JP5196140B2 - Transmission source determination program, recording medium, and transmission source determination method - Google Patents

Description

  The present invention relates to a CDMA (Code Division Multiple Access) mobile communication system using a relay station, which is used for determining whether a transmission source of a signal received by a path detection function is a base station or a relay station. It relates to a source determination program.

  In general, a mobile communication carrier installs necessary base stations to cover a service area provided by its mobile communication network (hereinafter referred to as “stationary station”). Here, the basic unit of the service area that satisfies the predetermined reception quality covered by the installed base station is called a “cell”. One base station has 3 cells, ie 3 sectors (or 3 cells) with 3 base station antennas, or 1 base station has 1 cell, ie 1 sector with 1 base station antenna ( Or 1 cell). These base station antennas transmit a cell identification signal for identifying each cell. When the reception quality parameter is measured in the actual field after being placed as described above, the cell coverage or the radio coverage (hereinafter referred to as “coverage”) in the service area is insufficient as compared with the prediction. In some cases, the coverage is too large and overlaps the area of another cell, resulting in interference. Work to solve such a problem is called cell design optimization (RF Field Optimization).

  The reception quality parameters measured and recorded for evaluating the communication quality of the service area include the total received power (Received Signal Strength Indicator: RSSI) of the corresponding radio band, the received power of the desired signal (in the mobile communication CDMA system, Received Signal Code Power (RSCP), desired signal-to-interference noise ratio (CIR: Carrier-to-Interference Ratio (before despreading), Signal-to-Interference Ratio: SIR (after despreading), etc. in mobile communication CDMA systems) The desired signal to total received power ratio (Ec / Io (before despreading) in a mobile communication CDMA system) is used.

  In the above-described work of cell design optimization, adjustment work such as compensation of coverage shortage of each cell or reduction of coverage overlap that causes interference is performed. For this purpose, it is generally necessary to determine from which station the signal measured at an arbitrary location is transmitted.

  When solving the problem of insufficient coverage of each cell, there are mainly three ways: 1) adjusting the direction and / or transmission power of the base station antenna, 2) newly placing a station, and 3) separately arranging relay stations. Will be dealt with.

  The above 1) is the method that can be dealt with at the lowest cost. However, if there is no possibility of obtaining an effective adjustment result no matter how it is devised, the above 2) or 3) is an effective countermeasure. The above 2) can increase not only the coverage but also the system capacity, but the cost is the highest. Compared with this, in 3), the system capacity does not increase, but it can be realized at a very low cost in expanding the coverage. For this reason, there are many cases where it is employed in a radio wave insensitive zone such as a suburb of a city or a local small city that does not require an increase in capacity.

  Here, when adopting the method of separating the relay stations in the above 3), first, in order to confirm the effect of the coverage as a result of adopting the method, the reception quality of radio waves acquired in outdoor and indoor fields Regarding measurement data, it is necessary to determine a signal transmitted from a base station and a signal transmitted from a relay station that receives and relays the signal of the base station. As a method for realizing this determination, it is obvious that a method of performing radio wave measurement in each of the state where the relay operation function of the relay station is stopped (OFF) and the state where it is operated (ON) may be used. In this method, the time and cost required for the measurement operation are doubled as compared to the normal measurement operation. Therefore, it is desirable that the transmission signal from the relay station can be identified by one measurement in a state where the relay operation function is activated.

  Hereinafter, a conventional method for identifying a transmission signal from a relay station by one measurement in a state where the relay operation function is activated will be described. Generally, in a mobile communication system, when a transmission signal of a relay station and a direct transmission signal from a base station that is the source of the transmission signal reach the measurement system at the same time, it is difficult to identify them. Therefore, in a mobile communication CDMA system, conventionally, determination is performed to identify a transmission signal from a relay station and a transmission signal from a base station by a method according to the following procedure.

Step 1.
A spread spectrum signal that is a cell identification signal unique to each cell that reaches a plurality of paths in a multipath propagation environment of mobile communication (PSC: Primary Scrambling Code, Mobile Communication CDMA2000 in a mobile communication WCDMA (Wideband CDMA) system) In the process of receiving PN (Pseudo Noise, etc.) in the system and despreading the received signal, two path detection functions that separate and detect the signals of the two paths one by one in descending order of power in the multipath (Hereinafter referred to as “Finger1” and “Finger2”), a time delay of a path detected by Finger1 and Finger2 of a predetermined PSC or PN is measured.

  FIG. 24 shows an example of the waveform after despreading of the cell identification signal that has passed through the two paths in the order of power in the multipath, and the correspondence between Finger1 and Finger2 that capture them. In FIG. 24, the horizontal axis represents time, and the vertical axis represents signal intensity. As shown in FIG. 24, since the time of the waveform captured by Finger1 is time t1, and the time of the waveform captured by Finger2 is time t2, the time delay difference between Finger1 and Finger2 is t2-t1. . The information obtained from these Finger1 etc. is not only the time delay difference of each detected path, but also the identification number (PSC number, PN number) of the reference spreading code used in the despreading process of the corresponding path by Finger1 etc. In addition, various quality information of the corresponding path (signal-to-interference noise energy ratio: Ec / Io (also expressed as Ec / No), despread identification signal power: RSCP, total reception of radio signal band) The measurement result of power (RSSI etc.) can also be obtained by the received signal processing following path detection by Finger1 etc.

Step 2.
The difference in time delay between the paths detected by Finger1 and Finger2 is compared with the relay processing delay τ _r of the relay station, and the following determination is made.

<Case 1>
If the absolute value of the time delay difference between the paths detected by Finger1 and Finger2 is greater than or equal to the relay processing delay τ _r , the finger with the smaller delay (the earlier time in FIG. 24) of Finger1 and Finger2 is detected The received signal is determined as a signal that is emitted from the base station and does not pass through the relay station (hereinafter referred to as “base station signal”), and the signal detected by the finger with the larger delay (the time is later in FIG. 24) is relayed. It is determined that the signal has passed through the station (hereinafter referred to as “relay station signal”).

<Case 2>
If the absolute value of the time delay difference between the paths detected by Finger 1 and Finger 2 is less than the relay processing delay τ _r , the determination for discriminating between the transmission signal from the relay station and the transmission signal from the base station is suspended.

  Next, the method of performing radio wave measurement in each of the state where the relay operation function of the relay station is stopped (OFF) and the state of operation (ON), and the method according to steps 1 and 2 described above were applied to the actual measurement example. The results will be described. FIG. 25 shows a three-dimensionally shaded map of the topographical situation regarding the altitude of the area including the service area to be measured in the mobile communication WCDMA system. In FIG. 25, a solid mesh pattern (inside the dotted ellipse 151) indicates the travel route of the measurement vehicle. The center of the three arrows 152, 153 and 154 on the right side of the center of FIG. 25 represents the base station 155, and each arrow 152 etc. represents a cell covering a service area of approximately 120 ° azimuth in the base station 155. Or, it represents the directional direction of the sector. Furthermore, the right end of the quadrilateral 156 on the left side of the center of FIG. 25 represents the relay station 157, and the direction of the left end of the quadrilateral 156 indicates the approximate orientation that the relay station 157 covers. As is clear from FIG. 25, the service area to be actually measured is located in a valley between mountains above and below in the map shown in FIG. 25, and the relay station 157 is located on the left side of that position in the map. It is stationed to increase the electric field strength of radio waves in the valley service area.

  FIG. 26 shows the measurement result of the relay station 157 by measuring the radio wave in the state where the relay operation function of the relay station is turned on (actuated) / off (stopped) in the service area to be measured shown in FIG. An example of actually measuring the effective service area is shown. 26, the same reference numerals as those in FIG. 25 indicate the same elements, and the description thereof is omitted. The original drawing of FIG. 26 is shown in color, but is black and white in the application drawing. In FIG. 26, the points plotted in red, yellow, white background with stripes and grays indicate the increase in the RSCP measurement value at that point when the relay operation function of the relay station 157 is switched from OFF to ON (in other words, For example, the RSCP measurement value difference between the relay operation function ON and OFF is shown. As shown in FIG. 26, the breakdown is as follows.

Red: RSCP measurement value difference between ON and OFF of relay operation function of relay station 157 is 4 dB or more (increase)
Yellow: RSCP measurement value difference between ON and OFF of relay operation function of relay station 157 is 1 dB or more and less than 4 dB (increase)
Stripes on white background: RSCP measurement value difference between ON and OFF of relay operation function of relay station 157 is -2 dB or more and less than 1 dB (including descending)
Gray: RSCP measurement value difference between relay operation function ON and OFF of relay station 157 is less than -2 dB (down)

  In order to determine the effective service area of the relay station 157, it is necessary to extract an area where the effect of the relay operation function is noticeable, and the area is an area where the points plotted in red (rise of 4 dB or more) are dense. Applicable. Areas that are plotted in other colors and points that are plotted in red, but not densely packed, are points due to fluctuations due to the interaction of radio waves transmitted from the base station and the relay station or measurement errors. You can think of it as an area. Based on the above measurement and inference, the effective service area of the relay station 157, that is, the area where the points plotted in red are concentrated, is a circular shape in which the relay station 157 is eccentric to the left slightly from the center of the map shown in FIG. It can be seen that

  Next, it is not inferred from the measurement of radio waves twice when the relay operation function of the relay station 157 is turned on (actuated) / off (stopped) as described above, but only once when the relay station 157 always performs the relay operation. An actual measurement example of the above-described conventional determination method (method comprising steps 1 and 2 above) for identifying each transmission signal of the base station 155 and the relay station 157 from the measurement result and determining their service area will be described. To do.

FIG. 27 shows a determination result when the above-described conventional determination method is applied to the service area to be measured shown in FIG. In FIG. 27, the same reference numerals as those in FIG. Here, the processing delay τ _r of the relay station 157 is 6.5 μsec≈25 chips (1 μsec = 3.84 chips in the mobile communication WCDMA system). In FIG. 27, “/” and black rhombus indicate points determined as “relay station signal” and “base station signal”, respectively, by <Case 1> described above. In FIG. 27, “.” (Period) and “−” (minus) indicate the points where the determination is suspended according to <Case 2> described above (denoted as “not determinable”). , Respectively “.” Or “−”. As apparent from FIG. 27, there is a case where the absolute value of the time delay difference between the paths detected by Finger1 and Finger2 is smaller than the relay processing delay τ _r (25 chips). It can be seen that the result is that the determination cannot be made completely.

“What is Optimization”, [online], Hiroei Co., Ltd., [Searched on December 25, 2007], Internet, <URL: http: //www.couei.co.jp/service/index.html>

As described above, in the conventional determination method for identifying the transmission signals of the base station 155 and the relay station 157 from the result of measurement only once and determining their service area, the signal from the same station is the relay station 157. When the finger 1 and finger 2 are detected via different paths having a temporal delay difference within the relay processing delay τ _r, it is difficult to determine at many measurement points. Providing good communication quality within a service area is essential in a mobile radio communication system, and therefore it is necessary to optimize coverage for areas where quality is not good. However, the above-described conventional determination method has a problem that it cannot determine whether the signal received by the measuring device (mobile station) is a “base station signal” or a “relay station signal” at many measurement points. It was. When cell optimization design is performed in a mobile communication WCDMA system, the received signal is a transmission signal from any station including not only the base station but also the relay station by using PSC and PN as cell identification signals of the base station. There was a problem that occurred when determining whether or not. That is, since the cell identification signal transmitted from the relay station is the same as the cell identification signal from the base station, it is determined whether the received cell identification signal is a transmission signal from the base station or a transmission signal from the relay station. There was a problem that could not be done.

  FIGS. 28A and 28B respectively show conceptual diagrams of service areas when the above determination cannot be made and when it can be made. The portions denoted by the same reference numerals as those in FIG. 25 in FIGS. In FIGS. 28A and 28B, reference numeral 160 denotes a mobile station (portable terminal). As shown in FIG. 28A, in the conventional determination method, the coverage classification between the base station 155 and the relay station 157 results in an unclear measurement, and the radio wave propagation environment for the mobile station 160 needs to be improved. However, it is not clear which station should be adjusted and how. On the other hand, as shown in FIG. 28B, when the coverage section B of the base station 155 and the coverage section R of the relay station 157 can be determined, the problem area of the radio wave propagation environment for the mobile station 160 can be improved. Become.

  In the mobile communication CDMA2000 system, cell identification signals of all base stations are synchronized with GPS (Global Positioning System), and the mobile stations are also synchronized with the base stations. Therefore, if the synchronization reference time is held by some means in the mobile station, the delay time from the base station to the mobile station can be measured. Therefore, although it is possible to determine the transmission source of the received signal to some extent by the determination of the delay time according to the conventional determination method described above, avoid leaving many points where the determination of the transmission source of the signal is suspended. I can't. In the case of a mobile communication WCDMA system, which is a system that operates asynchronously with respect to GPS, there is a problem that it is extremely difficult to determine the transmission source of a signal received by the conventional method described above.

  Accordingly, an object of the present invention is to solve the above-described problem, and when performing cell optimization design in a mobile communication WCDMA system and a mobile communication CDMA2000 system, PSC, When using the PN, it is possible to determine whether the transmission source of the received signal is a base station or a relay station from the result of measurement only once, and to clearly determine each coverage division between the base station and the relay station It is to provide a transmission source determination program and the like that can be used.

A transmission source determination program according to the present invention is a predetermined CDMA mobile communication system using a relay station, and a series of information obtained by performing alignment processing on a series of information acquired by a plurality of path detection functions over a plurality of time zones. The observation sample is obtained, the transmission source of the signal received by the predetermined path detection function is performed for the series of observation samples, and the predetermined path detection function for the observation sample is received based on the series of the temporary determinations. A transmission source determination program for determining whether a transmission source of a received signal is a base station or a relay station , and a plurality of connection calls indicating a time interval in a connection state from connection to disconnection of a call The information is composed of a series of pieces of information acquired in the time period, and each piece of information is composed of a block of data acquired for each of the plurality of path detection functions. A time relative position at which the data is acquired with reference to a standard time defined in a CDMA mobile communication system, and a predetermined value of a predetermined signal in the data, and each block for each information An observation sample acquisition step for obtaining each observation sample arranged based on the values; a temporal relative position of a predetermined block in the observation sample acquired in the observation sample acquisition step; and a predetermined block in the observation sample immediately before the observation sample A primary determination (or provisional determination) step for determining a transmission source of a signal received by the path detection function corresponding to the predetermined block in the observation sample based on the temporal relative position of the observation sample, , In the connection call based on the determination of the transmission source for the series of observation samples performed in the primary determination step. A second determination step of determining a transmission source of the received signal by the path detection function corresponding to the block, wherein the predetermined block is a block in which a predetermined value of the predetermined signal is maximum, and the connection call A series of information and a series of information of a non-connection call indicating a time interval in a non-connection state from disconnection to connection of the call are alternately recorded in the call information recording unit, and the predetermined signal is a cell identification signal, The predetermined value is a signal-to-interference noise energy ratio, and the observation sample acquisition step includes, for each piece of information of the connected call recorded in the call information recording unit, a temporal relative value, a cell identification signal, and An organizing step for creating organizing information composed of organizing blocks from which the signal-to-interference noise energy ratio is extracted, and an organizing block is transmitted to each organizing information created in the organizing step. An alignment step of obtaining observation samples arranged in descending order of the noise-to-interference noise energy ratio; and for each observation sample obtained in the alignment step, the signal pair of the best block that is the organizing block having the maximum signal-to-interference noise energy ratio If the interference noise energy ratio is less than or equal to a predetermined lower limit, the observation sample is deleted from the connected call, and if the signal-to-interference noise energy ratio of the best block exceeds a predetermined lower limit, the observation sample in the best block A change amount calculating step for obtaining a change amount between a temporal relative value and a temporal relative value in the best block of the observation sample immediately before the observation sample, wherein the primary determination step is performed for the observation sample of the connection call. The cell identification signal received by the best path detection function which is the path detection function corresponding to the best block of the observed sample For the transmission source, when the amount of change obtained in the change amount calculation step is equal to or greater than a predetermined threshold, the relay station determination step for obtaining a primary determination result for determining the transmission source as a relay station, and the change amount calculation step When the obtained change amount is equal to or less than a negative value of the predetermined threshold, a base station determination step for obtaining a primary determination result for determining the transmission source as a base station, and a change amount obtained in the change amount calculation step Is less than the predetermined threshold and greater than the negative value of the predetermined threshold, a determination hold step for determining that the transmission source is held, and if the determination is not completed for all the observation samples of the connected call, A primary determination repetition step that returns to the relay station determination step and repeats the process, and the secondary determination step is an observation sample in which the transmission source is determined to be suspended in the determination suspension step If there is an observation sample in which a primary determination result obtained in the primary determination step is obtained in a connection call for a determination pending observation sample that is a prior to the first observation sample in which the primary determination result was obtained in the connection call The determination opposite to the primary determination result of the first observation sample is applied to the determination pending observation sample, and the primary determination result is obtained for the determination pending observation sample after the first observation sample. A determination applying step that applies the same determination as the primary determination result of a previous observation sample, and there is no observation sample from which the primary determination result obtained by the primary determination step is obtained in the connection call, and the point where the information is acquired is a base station And the base station that determines the source of the cell identification signal received by the best path detection function for all the determination pending observation samples in the connection call as the base station. If there is no observation sample from which the primary determination result obtained in the primary determination step is obtained in the next determination step and the connection call and the point where the information is acquired is not within the predetermined distance from the base station, The same processing as in the observation sample acquisition step is performed for each piece of information in the unconnected call, and the observation source for the cell identification signal received by the best path detection function of the observation sample is received for each observation sample of the non-connection call. If the time difference between the sample and the observation sample immediately before the observation sample is greater than or equal to a predetermined time, or if the amount of change obtained in the change amount calculation step exceeds a predetermined other threshold, the determination is not possible, and the observation When the time difference between the sample and the observation sample immediately before the observation sample is less than a predetermined time, and the change amount obtained in the change amount calculation step is When the change amount calculated in the change amount calculation step is greater than or equal to the predetermined threshold value, the transmission source is determined to be a relay station, and the change amount is less than or equal to the predetermined threshold value. A non-connection call determination step that determines that the transmission source is a base station if it is less than or equal to a negative value, and that cannot be determined if the amount of change is less than the predetermined threshold and greater than a negative value of the predetermined threshold; If the determination is not impossible in the non-connection call determination step, the non-connection call determination step as a transmission source of the cell identification signal received by the best path detection function for all determination pending observation samples in the connection call A cell identification received by the best path detection function for all determination pending observation samples in the connection call when the determination by the non-connection call determination application step and the non-connection call determination step are not possible signal Proximity observation sample determination application that applies the determination for the closest observation sample that is a connection call before the non-connection call and that has received the determination of the transmission source of the cell identification signal received by the best path detection function And a secondary determination repetition step that returns to the determination application step and repeats the process when the determination or application of the determination is not completed for all determination pending observation samples of the connected call. .

Here, in the transmission source determination program according to the present invention, the predetermined block is a block in which the predetermined value of the predetermined signal is the maximum and a next largest block , and the change amount calculating step is performed for both blocks. The amount of change in the relative value of the target is calculated separately, and the primary determination step shows that the amount of change in the time relative value of the opposite polarity and the same absolute amount is present in both blocks calculated individually in the amount of change calculation step. further comprising can Rukoto the step of detecting.

A transmission source determination program according to the present invention is a predetermined CDMA mobile communication system using a relay station, and a series of information obtained by performing alignment processing on a series of information acquired by a plurality of path detection functions over a plurality of time zones. The observation sample is obtained, the transmission source of the signal received by the predetermined path detection function is performed for the series of observation samples, and the predetermined path detection function for the observation sample is received based on the series of the temporary determinations. A transmission source determination program for determining whether a transmission source of a signal is a base station or a relay station, wherein the series of information is based on a series of measurement information acquired in a plurality of time zones in a predetermined time unit. The series of measurement information is recorded in the measurement information recording unit, and each measurement information includes a first path having the maximum power and a second path having the next highest power in the multipath. Each power recorded in the measurement information recording unit includes the power value of each path acquired at each measurement time by the first path detection function and the second path detection function to detect the separation and the relative delay amount of the two paths. An observation sample acquisition step for obtaining each observation sample that has been subjected to alignment processing based on each measurement time with respect to measurement information, and the observation sample based on the relative delay amount and a predetermined threshold in the observation sample acquired in the observation sample acquisition step The primary determination step of determining the transmission source of the signal received by the first path detection function for a series of observation samples, the power value of the first path in the observation sample, and the first in the observation sample immediately before the observation sample The signal received by the first path detection function in the observation sample based on the power value of the first path, the power value of the second path, and a predetermined power difference threshold value. A first path detection function for the observation sample based on the replacement determination and the transmission source determination for the series of observation samples performed in the primary determination step. Re-determine the transmission source of the received signal, and based on the comparison between the relative delay amount in the observation sample and the predetermined threshold and the re-determination, or the power of each path in the comparison and the observation sample based on a comparison of the values and該再determination, characterized in that a secondary determination step of final determination of the transmission source of the signal by the first path detection function for the observed sample is received for a series of observations sample And

  Here, in the transmission source determination program according to the present invention, the primary determination step is configured to perform the observation on the transmission source of the cell identification signal received by the first path detection function with respect to the observation sample acquired in the observation sample acquisition step. When the relative delay amount of the sample is equal to or greater than a predetermined threshold, a base station determination step for obtaining a primary determination result for determining the transmission source as a base station; and the relative delay amount of the observation sample is the predetermined threshold A relay station determination step for obtaining a primary determination result for determining that the transmission source is a relay station, the relative delay amount of the observation sample is less than the predetermined threshold and the predetermined threshold If it is greater than a negative value, a determination hold step for determining that the transmission source is hold, and for all observation samples acquired in the observation sample acquisition step If the serial determination is not completed, it is possible and a primary determination repeating step of repeating the process returns to the base station determining step.

  Here, in the transmission source determination program according to the present invention, the secondary determination step includes the first pass power value and the first observation sample immediately before the observation sample with respect to the observation sample acquired in the observation sample acquisition step. The difference between the power value of the first path is larger than the first power difference threshold value, and the absolute value of the difference between the power value of the first path and the power value of the second path in the observation sample immediately before the observation sample is the second power difference. If it is smaller than the threshold value, the determination is put on hold by the change determination step for determining that a change has occurred in the transmission source of the cell identification signal received by the first path detection function at the time of the observation sample, and the determination hold step. For the observation sample, it is not determined that the replacement has occurred in the replacement determination step, and the observation sample immediately before the observation sample is primary. When a fixed result is obtained, the same determination as that of the primary determination result is applied to the observation sample, and when it is determined that a replacement has occurred in the replacement determination step, In the re-determination step that applies the same determination as the primary determination result of the observation sample from which the primary determination result was first obtained after the observation sample, and in the re-determination step, it is determined that a replacement has occurred in the replacement determination step. If the primary determination result is not obtained for the observation sample immediately before the observation sample, the primary determination result for the observation sample is the same as that of the nearest observation sample obtained before the observation sample. And the relative delay of the observation sample acquired in the observation sample acquisition step. If the absolute value of is not greater than or equal to a predetermined threshold, the determination pending observation sample final determination step in which the determination applied to the observation sample in the re-determination step or the re-determination step is a final determination, and the observation sample acquisition step When the absolute value of the relative delay amount of the observed sample is greater than or equal to a predetermined threshold, if the power value in the first path is smaller than the power value in the second path, the primary determination result obtained in the primary determination step If the power value in the first path is not smaller than the power value in the second path, the primary determination result obtained in the primary determination step is used as the final determination. For all observation samples acquired in the final determination step and the observation sample acquisition step When the final determination is not completed, a secondary determination repeating step of returning to the replacement determination step and repeating the process can be provided.

Transmission source determination program of the present invention, the relay station a predetermined CDMA mobile communication system using the computer, in a section of the connected call to execute the transmission source determination program according to claim 1 or 2, non A transmission source determination program for executing the transmission source determination program according to any one of claims 3 to 5 in a connected call section.

The recording medium of the present invention is a computer-readable recording medium in which the transmission source determination program according to any one of claims 1 to 6 is recorded.

The transmission source determination method according to the present invention is a predetermined CDMA mobile communication system using a relay station, and a series of observation samples obtained by aligning a series of information acquired by a plurality of path detection functions over a plurality of time zones. The transmission source of the signal received by the predetermined path detection function for the observation sample is determined based on the temporary determination of the transmission source of the signal received by the predetermined path detection function for the series of observation samples. Is a transmission source determination method for determining whether is a base station or a relay station, and the connection call indicating the time interval in the connection state from connection to disconnection of the call is acquired in a plurality of time zones in a predetermined time unit It is composed of a series of information, each information is composed of a plurality of blocks of data acquired for each of the path detection functions, and each block is a standard time determined by a predetermined CDMA mobile communication system Each observation sample including the relative time position at which the reference data is acquired and a predetermined value of a predetermined signal in the data is obtained by aligning each block based on the predetermined value for each information. Based on the observation sample acquisition step, the temporal relative position of the predetermined block in the observation sample acquired in the observation sample acquisition step, and the temporal relative position of the predetermined block in the observation sample immediately before the observation sample A primary determination (or tentative determination) step for determining a transmission source of a signal received by a path detection function corresponding to the predetermined block in a sample for a series of observation samples, and a series of steps performed in the primary determination step Based on the determination of the transmission source for the observation sample, the path detection function corresponding to the predetermined block has been received in the connection call. A second determination step of determining a transmission source of the signal, wherein the predetermined block is a block in which a predetermined value of the predetermined signal is maximum, the predetermined signal is a cell identification signal, The value is a signal-to-interference noise energy ratio, and the observation sample acquisition step includes an organization block composed of an organization block obtained by extracting a temporal relative value, a cell identification signal, and a signal-to-interference noise energy ratio from each block for each information. An arrangement step for creating information, an alignment step for obtaining observation samples in which the arrangement blocks are arranged in descending order of the signal to interference noise energy ratio for each arrangement information created in the arrangement step, and For each observation sample obtained, the signal-to-interference noise energy of the best block, which is the organizing block with the largest signal-to-interference noise energy ratio, is obtained. If the energy ratio is less than or equal to a predetermined lower limit value, the observed sample is deleted from the connected call, and if the signal-to-interference noise energy ratio of the best block exceeds a predetermined lower limit value, A change amount calculating step for obtaining a change amount between a relative value and a temporal relative value in the best block of the observation sample immediately before the observation sample, wherein the primary determination step is performed for the observation sample of the connection call For the transmission source of the cell identification signal received by the best path detection function that is the path detection function corresponding to the best block of the observation sample, when the change amount obtained in the change amount calculation step is equal to or greater than a predetermined threshold, the transmission A relay station determination step for obtaining a primary determination result for determining a source as a relay station, and a change amount obtained in the change amount calculation step is equal to the predetermined threshold value. A base station determination step for obtaining a primary determination result for determining the transmission source as a base station, and a change amount obtained in the change amount calculation step is less than the predetermined threshold and the predetermined threshold If it is greater than a negative value, a determination hold step for determining that the transmission source is held, and if the determination has not been completed for all observation samples of the connected call, return to the relay station determination step and repeat the process. A determination repetitive step, wherein the secondary determination step is a primary determination result by the primary determination step in a connection call with respect to a determination hold observation sample that is an observation sample determined to be a hold source in the determination hold step If there is an observation sample obtained for the decision pending observation sample prior to the first observation sample for which the primary decision result was obtained during the connection call, Apply the opposite judgment to the primary judgment result of the first observation sample, and the primary judgment result of the nearest previous observation sample from which the primary judgment result was obtained for the judgment pending observation sample after the first observation sample If there is no observation sample from which the primary determination result by the primary determination step is obtained in the connection call and the point where the information is acquired is within a predetermined distance from the base station, the determination application step applying the same determination as A base station secondary determination step for determining the transmission source of the cell identification signal received by the best path detection function for all determination pending observation samples in the connection call as a base station, and a primary determination by the primary determination step in the connection call If there is no observation sample from which the result is obtained and the point from which the information is acquired is not within the predetermined distance from the base station, the observation support for each piece of information in the unconnected call immediately before the connected call is obtained. For each observation sample of the unconnected call, for the transmission source of the cell identification signal received by the best path detection function of the observation sample, the observation sample and the observation sample immediately before the observation sample are processed. When the time difference between and the observation amount is greater than or equal to a predetermined time, or when the amount of change obtained in the change amount calculation step exceeds a predetermined other threshold, the determination is impossible, and the observation sample and the observation sample immediately before the observation sample And when the amount of change obtained in the change amount calculation step is less than or equal to the other threshold value, the amount of change obtained in the change amount calculation step is the predetermined amount. When the threshold is equal to or greater than the threshold, the transmission source is determined as a relay station, and when the amount of change is equal to or less than a negative value of the predetermined threshold, the transmission source is determined as a base station. A non-connection call determination step in which determination is impossible if it is less than the predetermined threshold and greater than a negative value of the predetermined threshold, and if determination is not impossible in the non-connection call determination step, all of the connections in the connection call In the non-connection call determination application step for applying the determination in the non-connection call determination step as a transmission source of the cell identification signal received by the best path detection function, and in the non-connection call determination step If all of the pending determination observation samples in the connected call are the transmission source of the cell identification signal received by the best path detection function, it is a connected call before the non-connected call and the best path detection function. A proximity observation sample determination application step that applies a determination on the closest observation sample from which a determination of the transmission source of the received cell identification signal is obtained, and all connection calls If the application of the decision or determination to the constant hold observation sample has not been completed, characterized by comprising a secondary determination repeating step of repeating the process returns to the determination step of applying.

Here, in the transmission source determination method according to the present invention, the predetermined blocks are a block in which the predetermined value of the predetermined signal is the largest and a next largest block , and the change amount calculation step is performed for both blocks. The amount of change in the relative value of the target is calculated separately, and the primary determination step shows that the amount of change in the time relative value of the opposite polarity and the same absolute amount is present in both blocks calculated individually in the amount of change calculation step. further comprising can Rukoto the step of detecting.

The transmission source determination method according to the present invention is a predetermined CDMA mobile communication system using a relay station, and a series of observation samples obtained by aligning a series of information acquired by a plurality of path detection functions over a plurality of time zones. The transmission source of the signal received by the predetermined path detection function for the observation sample is determined based on the temporary determination of the transmission source of the signal received by the predetermined path detection function for the series of observation samples. A transmission source determination method for determining whether is a base station or a relay station, wherein the series of information includes a series of measurement information acquired in a plurality of time zones in a predetermined time unit, and the series of measurement information Is recorded in the measurement information recording unit, and each measurement information is a first path detection function and a second path detection for separately detecting the first path having the maximum power and the second path having the next largest power among the multipaths. Machine An observation sample acquisition step for obtaining each observation sample that is aligned based on each measurement time for each measurement information, including the power value of each path acquired at each measurement time and the relative delay amount of the two paths by Based on the relative delay amount in the observation sample acquired in the observation sample acquisition step and a predetermined threshold, the transmission source of the signal received by the first path detection function in the observation sample is determined for a series of observation samples. The primary determination step to be performed, the power value of the first path in the observation sample, the power value of the first path and the power value of the second path in the observation sample immediately before the observation sample, and a predetermined power difference threshold In the observation sample, a replacement determination is made as to whether or not the transmission source of the signal received by the first path detection function has occurred. And determining the transmission source of the signal received by the first path detection function for the observation sample based on the determination of the transmission source for the series of observation samples performed in the primary determination step, and The first path for the observation sample based on the comparison between the delay amount and the predetermined delay amount threshold and the redetermination, or based on the comparison and the comparison of the power value of each path in the observation sample and the redetermination. characterized by comprising a secondary determination step of final determination of the transmission source of the signal detection function, it received for a series of observations sample.

  Here, in the transmission source determination method according to the present invention, the primary determination step is configured to perform the observation on the transmission source of the cell identification signal received by the first path detection function for the observation sample acquired in the observation sample acquisition step. When the relative delay amount of the sample is equal to or greater than a predetermined threshold, a base station determination step for obtaining a primary determination result for determining the transmission source as a base station; and the relative delay amount of the observation sample is the predetermined threshold A relay station determination step for obtaining a primary determination result for determining that the transmission source is a relay station, the relative delay amount of the observation sample is less than the predetermined threshold and the predetermined threshold If it is greater than a negative value, the determination hold step for determining that the transmission source is hold, and the determination for all observation samples acquired in the observation sample acquisition step. If but not completed, it may comprise a primary determination repeating step of repeating the process returns to the base station determining step.

  Here, in the transmission source determination method according to the present invention, the secondary determination step includes the first path power value and the first observation sample immediately before the observation sample with respect to the observation sample acquired in the observation sample acquisition step. The difference between the power value of the first path is larger than the first power difference threshold value, and the absolute value of the difference between the power value of the first path and the power value of the second path in the observation sample immediately before the observation sample is the second power difference. If it is smaller than the threshold value, the determination is put on hold by the change determination step for determining that a change has occurred in the transmission source of the cell identification signal received by the first path detection function at the time of the observation sample, and the determination hold step. For the observation sample, it is not determined that the replacement has occurred in the replacement determination step, and the primary determination result is obtained for the observation sample immediately before the observation sample. Is obtained, the same determination as the primary determination result is applied to the observation sample. When it is determined that the replacement has occurred in the replacement determination step, the observation sample is subjected to the observation. In the re-determination step that applies the same determination as the primary determination result of the observation sample from which the primary determination result was first obtained after the sample, and in the re-determination step, it is not determined that the replacement has occurred in the replacement determination step and If the primary determination result is not obtained in the observation sample immediately before the observation sample, the same determination as the primary determination result of the closest observation sample for which the primary determination result was obtained before the observation sample Re-determination step for applying the observation sample, and the relative delay amount of the observation sample acquired in the observation sample acquisition step If the value is not equal to or greater than a predetermined threshold, the determination is obtained in the determination pending observation sample final determination step and the observation sample acquisition step in which the determination applied to the observation sample in the re-determination step or the re-determination step is a final determination. When the absolute value of the relative delay amount of the observation sample is equal to or greater than a predetermined threshold, and the power value in the first path is smaller than the power value in the second path, the inverse of the primary determination result obtained in the primary determination step When the power value in the first path is not smaller than the power value in the second path, the primary determination result obtained in the primary determination step is used as the final determination for the observation sample. The final determination step to be applied and all the observation samples acquired in the observation sample acquisition step When the final determination is not completed, a secondary determination repeating step of returning to the replacement determination step and repeating the process can be provided.

The transmission source determination method according to the present invention is a predetermined CDMA mobile communication system using a relay station, and uses the transmission source determination method according to claim 8 or 9 in a connected call section and claim 10 in an unconnected call section. The transmission source determination method according to any one of 1 to 12 is used.

  In the first transmission source determination program or the like of the present invention, first, each observation sample obtained by aligning each block based on the value of Ec / Io of PSC is obtained for each Finger info data. Next, the temporal relative position of the block (best block) in which the value of Ec / Io of the cell identification signal in the acquired observation sample is the maximum and the temporal block of the best block in the observation sample immediately before the observation sample. Based on the change amount δ (fing_pos) between the relative positions, the transmission source of the signal received by the Best finger corresponding to the best block in the observation sample is determined for a series of observation samples (primary determination). In the primary determination, a determination for identifying the direct transmission source (relay station or donor base station) is performed for each Finger info data of the target PSC. Finally, the transmission source of the signal received by the Best finger in the connected call is determined based on the transmission source determination for the series of observation samples performed in the primary determination (secondary determination). When only the best finger is the target, the change amount δ (fing_pos) of the temporal relative value between the current and previous best fingers is calculated, and the target PSC that occurs when the measurement system enters and exits the coverage area of the relay station Changes in the relative time value of are detected. That is, in the secondary determination, the determination is made because there is a high degree of accuracy with which it is possible to determine that the base station signal and the relay station signal are switched before and after the observation sample when the primary determination result is first output. Do. On the other hand, for the determination pending observation sample after the observation sample when the primary determination result is first output, the determination is confirmed by prioritizing the primary determination result in front. As described above, according to the first transmission source determination program of the present invention, when cell optimization design is performed in the mobile communication WCDMA system and the mobile communication CDMA2000 system, PSC and PN are used as cell identification signals of the base station, respectively. In this case, it is possible to determine whether the transmission source of the received signal is a base station or a relay station from the measurement results of connected calls and non-connected calls composed of a series of finger info data measured only once. It is possible to provide a transmission source determination program or the like that can clearly determine each coverage division between the relay station and the relay station. For this reason, when cell optimization design is performed in the mobile communication WCDMA system and the mobile communication CDMA2000 system, the cost of coverage determination work by the actual measurement data of the area where the relay station is located is reduced, the accuracy of coverage determination is improved, and the problem occurs There is an effect that there is a big advantage in various points such as the certainty improvement of the solution at the time.

  In the second transmission source determination program of the present invention, not only the best finger but also the secondary best finger corresponding to the block having the second highest Ec / Io value of the cell identification signal in the observation sample is used in the primary determination. it can. The amount of change δ (fing_pos) of the temporal relative value of both the current best finger and the secondary best finger is individually calculated. In both cases, the amount of change δ (fing_pos) of the temporal relative value of opposite polarity and the same absolute amount is calculated. ) Is detected, it is possible to provide a transmission source determination program or the like that can obtain a more reliable primary determination result.

  In the third transmission source determination program of the present invention, data acquired from a measurement system that can provide relative delay information using two or more fingers for the same PSC (or PN) can be used. In this case, the primary determination is performed using the relative delay amount of each path captured by the two Finger1 and Finger2. In the secondary determination, first, a replacement determination as to whether or not a replacement has occurred in the transmission source of the signal received by Finger1 in the observation sample is obtained. Based on the replacement determination and the transmission source determination for the series of observation samples performed in the primary determination, the transmission source of the signal received by Finger1 for the observation sample is re-determined and final determination is performed. As described above, according to the third transmission source determination program of the present invention, by using data acquired from a measurement system that can provide relative delay information using two or more fingers for the same PSC (or PN). Based on the measurement result composed of a series of data measured only once, it can be determined whether the transmission source of the received signal is a base station or a relay station, and each coverage division between the base station and the relay station is clarified There is an effect that a transmission source determination program or the like that can be determined can be provided.

  According to the fourth transmission source determination program of the present invention, the first or second transmission source determination program is executed in the connected call section, and the third transmission source determination program is executed in the non-connected call section. Thus, the advantage of each transmission source determination program can be obtained.

  Hereinafter, the theoretical background for supporting the validity of the transmission source determination program of the present invention will be described first, and then each embodiment will be described in detail with reference to the drawings.

Theoretical background.
First, a radio wave propagation path from a base station to a mobile station in the case of a multipath propagation environment of mobile communication where radio waves are distributed and arrived at a plurality of paths when no relay station is present will be considered. FIG. 1 shows a model of a radio wave propagation path from a base station to a mobile station when no relay station is present. In FIG. 1, reference numeral 10 is a base station, 12 is a mobile station, and 20 is a reflector. As shown in FIG. 1, the main path from the base station 10 to the mobile station 12 is a path P1 where a direct wave arrives, and a delayed wave that reaches due to reflection by a reflector 20 or diffraction by an obstacle (not shown). Route P2. In general, a plurality of delay wave paths P2 may exist. Here, a path that obtains the maximum received power among the plurality of paths is treated as the path P2. The transmission source determination program of the present invention is intended to determine the transmission source of the identification signal received in each path of the maximum level and the next highest level in the mobile station 12, and therefore the object to be handled is described above. Even so, the generality of the discussion will not be lost.

  As shown in FIG. 1, since there is a difference in path length between the path P1 and the path P2, a relative delay time τ represented by the following expression 1 is generated in the identification signal reaching the mobile station 12.

    τ = (P2−P1) / speed of light (1)

  In a radio wave propagation environment in an urban area or indoors, the average power distribution p (τ) of a delayed wave with respect to the relative delay time τ based on the arrival time of the direct wave (referred to as a delay profile) is generally expressed by the following equation: It is known that it can be well approximated by the exponential function model shown by 2 (Yoshio Hosoya, Kitami Institute of Technology Planning and Supervision "Radio Wave Propagation Handbook", Realize Science Center (Realize AT Co., Ltd.) published, January 1999 (See 28th, 1st printing, page 131).

However, P _R is the received power, the sigma _tau is the delay spread (standard deviation of the relative delay time tau). In this case, the received power P _R at normalized normalized delay profile P (tau) / P _R is a formula 3 below.

When the normalized delay profile P (tau) / P _R integrated between the tau, normalized cumulative power Formula 4 below P _{C (τ) (receiving} the received power relative delay time is less tau power P _R Obtained by normalization).

Incidentally, typical value in urban delay spread sigma _tau in a mobile communication cell radius 2 (miles) or less, of the order of 0.1 (μsec) ~1 (μsec) . Figure 2, as an example, is a graph showing an example of a σ _τ = 0.5 _(μsec) and when normalized delay profile P (τ) / P _R and the normalized cumulative power P _{C (τ).} In FIG. 2, the horizontal axis represents the relative delay time τ (μsec), the vertical axis represents the normalized value, the rhombus indicates the normalized delay profile P (τ) / P _R , and the square indicates the normalized accumulated power P _C (τ). . As shown in FIG. 2, for example, the value of the normalized accumulated power P _C (τ) at which the relative delay time τ is 2 (μsec) or less is 0.98 (98% of the total received power). Here, the capture signal of confidence as (probability) power, the normalized delay profile P (tau) / P _R and the normalized cumulative power P _{C (tau)} is the probability density function (PDF on the relative delay time tau : Probability Density Function) and Cumulative Distribution Function (CDF). Therefore, in the example in which the delay spread σ _τ = 0.5 (μsec) as shown in FIG. 2, all of the identification signals having a relative delay time τ of 2 μsec or less arrived via two different paths. It can be seen that the reliability when the signals from the same transmission source are judged is 98%.

  Next, a radio wave propagation path from a base station (a base station having a relay relationship with the relay station is generally referred to as a donor base station) to the mobile station when a relay station exists will be considered. 3 and 4 show a model of a radio wave propagation path from a base station to a mobile station in the presence of a relay station. 3 and 4 that are denoted by the same reference numerals as those in FIG. 3 and 4, reference numeral 14 is a relay station, reference numeral 22 in FIG. 3 is a reflector, and reference numeral 24 in FIG. 4 is a reflector. In addition to the route configurations P1 and P2 shown in FIG. 1, it is necessary to consider the routes shown in FIGS. 3 and 4 as the route passing through the relay station 14. FIG. 3 shows a delay due to a reflector P 22 generated between the base station 10 via the relay station 14 and the mobile station 12 and a direct wave reaching the mobile station 12 and the relay station 14 to the mobile station 12. A path P4 through which a wave (reflected wave or diffracted wave) reaches is shown. FIG. 4 shows a path P5 on which a delayed wave (reflected wave or diffracted wave) due to the reflector 24 generated between the base station 10 and the relay station 14 arrives in addition to the path P3.

  Now, a method of determining whether the source immediately before the identification signal received by the mobile station 12 is the base station 10 or the relay station 14 is that it does not pass through the relay station 14 (not through the relay station) and passes through the identification signal. It is determined from the difference in radio wave propagation delay with the identification signal (via relay station). FIG. 5 shows a combination of routes via / without a relay station and a delay difference between the routes (P1, P2, P3, P4 and P5) modeled in FIGS. 3 and 4 according to the case. A summary table 30 is shown. In FIG. 5, reference numeral 31 is a case classification column, 32 is a path combination column in the case, 33 is a radio wave propagation delay difference column in the case, and 34 is a remarks column in the case. As shown in FIG. 5, the difference in radio wave propagation delay in case 1 (combination of paths P3 and P1) is the difference in radio wave propagation delay between path P3 and path P1 + the processing delay in relay station 14. As shown in the remarks column 34, in case 1, it is assumed that there are no reflectors and obstacles. Next, the difference in radio wave propagation delay in case 2 (combination of paths P3 and P2) is the difference in radio wave propagation delay between path P3 and path P1, that is, the difference in radio wave propagation delay in case 1 from path P2. The difference of the radio wave propagation delay with respect to the path P1 is subtracted. Subsequently, the difference in radio wave propagation delay in case 3 (combination of paths P4 and P1) is the difference in radio wave propagation delay between path P3 and path P1, that is, the difference in radio wave propagation delay in case 1 and path P4. The difference of the radio wave propagation delay with respect to the path P3 is added. The difference in radio wave propagation delay in case 4 (combination of paths P4 and P2) is the difference in radio wave propagation delay between path P3 and path P2, that is, the difference in radio wave propagation delay in case 2 is the difference between path P4 and path P3. The difference in radio wave propagation delay between the two is added. The difference in radio wave propagation delay in case 5 (combination of paths P5 and P1) is different from the difference in radio wave propagation delay between path P3 and path P1, that is, the difference in radio wave propagation delay in case 1 between path P5 and path P3. The difference in radio wave propagation delay between the two is added. Finally, the difference in radio wave propagation delay in case 6 (combination of paths P5 and P2) is different from the difference in radio wave propagation delay between path P3 and path P2, that is, the difference in radio wave propagation delay in case 2 with path P5. The difference of the radio wave propagation delay with respect to the path P3 is added. Difference in radio wave propagation delay in case 1, difference in radio wave propagation delay between path P2 and path P1, difference in radio wave propagation delay between path P4 and path P3, propagation of radio wave between path P5 and path P3 Since each delay difference is positive, the difference in radio wave propagation delay becomes the minimum value from Table 30 because the difference in radio wave propagation delay between path P3 and path P2 (case 2: minimum delay difference). I understand that. On the other hand, cases 3 and 5 have the maximum difference in radio wave propagation delay (maximum delay difference). Since the coverage area of the relay station 14 is smaller than that of the base station 10 and the beam width of the directional antenna for the base station 10 (referred to as a donor antenna) of the relay station 14 is small, the radio wave between the path P4 and the path P3. It can be assumed that the difference in propagation delay and the difference in radio wave propagation delay between the paths P5 and P3 are both smaller than the difference in radio wave propagation delay between the paths P2 and P1. From the above, in order to determine whether the identification signal is a “relay station signal” via the relay station 14 or a “base station signal” via the relay station, the following criterion is adopted.

<Criteria 1> If the delay difference in case 2 is larger than the predetermined threshold τ _th , the one with the larger delay is determined as the “relay station signal”.
<Criteria 2> When the delay difference in case 2 is less than or equal to the predetermined threshold τ _th , both are determined to be identification signals from the same station (the same base station or the same relay station).

However, the setting condition of the predetermined threshold value τ _th is determined as follows.

<Setting Condition 1> Normalized Cumulative Power P _C (τ _th ) = Lower Value of Predetermined Reliability <Setting Condition 2> Predetermined Threshold τ _th <Relay Processing Delay τ _t

In the following, it is assumed that the delay spread σ _τ = 0.5 (μsec) as in the above example, and all the identification signals having the relative delay time τ of 2 (μsec) or less are transmitted via two different paths. Assuming that the normalized accumulated power P _C (τ _th ) = 0.98 is 0.98, which is the reliability when it is determined that the signal has arrived from the same transmission source, is the lower limit value of the predetermined reliability, and the relay station _Let us consider a case where the relay processing delay τ _r = 5 (μsec) is assumed. Here, the assumption that the normalized accumulated power P _C (τ _th ) = 0.98 is that the predetermined threshold value τ _th = 2 (μsec), and 2 μsec for the occurrence of the delay difference due to reflection from the reflector. This means that the following delayed wave components are considered. FIG. 6 shows a radio wave propagation path modeled on a two-dimensional coordinate formed by a horizontal axis (X axis) and a vertical axis (Y axis) when the separation distance between the relay station and the donor base station is 2 km. In FIG. 6, the portions denoted by the same reference numerals as those in FIG. In FIG. 6, the horizontal axis (X axis) is the horizontal distance between the donor base station 10 and the relay station 14, and the vertical axis (Y axis) is the vertical direction between the donor base station 10 and the relay station 14. Distance P0 is a path between the donor base station 10 and the relay station 14. As shown in FIG. 6, when the coordinates of the donor base station 10 are taken as the origin (0, 0), the coordinates of the relay station 14 are (2 km, 0). The coordinates of the mobile station 12 are (x, y). In FIG. 6, each variable is newly defined as follows.

τ ₀ : Radio wave propagation delay between donor base station 10 and relay station τ ₁ : Direct wave radio wave propagation delay between donor base station 10 and mobile station 12 τ ₂ : Radio wave propagation delay τ _{3 on} path P ₂ : Radio wave propagation delay τ _r between relay station 14 and mobile station 12: Relay processing delay of relay station 14 = 5 (μsec)

At this time, the difference τ _{d in} radio wave propagation delay between the path P3 and the path P2 is given by the following equation (5).

τ _d = τ ₀ + τ ₃ + τ _r − τ ₂ (5)

  However,

(C = 3 × 10 ⁵ (km / sec) = 0.3 (km / μsec): speed of light)

  In summary, the following equation 10 is obtained.

As is apparent from the rightmost side of Expression 10, the difference τ _{d in} the radio wave propagation delay between the path P3 and the path P2 is the radio wave propagation delay τ ₃ (Formula 9) between the relay station 14 and the mobile station 12. This is a value obtained by adding a fixed value (τ ₀ +3 (μsec)) to the difference from the direct wave radio wave propagation delay τ ₁ (Equation 8) between the donor base station 10 and the mobile station 12. Accordingly, it can be seen that the locus of the mobile station 12 (coordinates (x, y)) where τ _d is constant draws a hyperbola with a constant difference in distance from the donor base station 10 and the relay station 14.

FIGS. 7 and 8 show the results of calculating the radio wave propagation delay difference τ _d between the path P3 and the path P2 of FIG. 6 based on the equation 10 as a three-dimensional graph 40 and a two-dimensional graph 50, respectively. In both graphs 40 and 50, the same reference numerals as those in FIG. In both graphs 40 and 50, the X axis is the horizontal distance between the donor base station 10 and the mobile station 12, and the Y axis is the vertical distance between the donor base station 10 and the mobile station 12, The Z axis is a delay (μsec). Although black and white are displayed in the application drawing, the delays are color-coded as shown in the legend in both graphs 40 and 50 of the original drawing. As shown in both graphs 40 and 50, the delay difference is 3 μsec or more in all areas. This is because the sum (τ ₀ + τ ₃ ) of the first and second terms in the rightmost side of Equation 10 and the third term component (τ ₁ ) are the donor base station 10, the relay station 14, the movement It is positive because it is equivalent to the relationship between the sum of the two sides of the triangle with the station 12 as the vertex and the remaining one side (the sum of the two sides of the triangle is greater than one side). This is because the difference {(τ ₀ + τ ₃ ) −τ ₁ } is a non-negative value including the case where they are arranged, so that τ _d is 3 (μsec) or more. As described above, in the above parameter setting example, the radio wave propagation delay difference τ _d (3 (μsec) or more) between the path P3 and the path P2 is larger than the predetermined threshold τ _th (= 2 (μsec)). Therefore, if the delay difference in the above-mentioned “<reference 1> case 2 is larger than the predetermined threshold τ _th ”, the larger delay is determined as the “relay station signal”. "Is established. Therefore, when the “base station signal” and the “relay station signal” are mixed in the received signal (for example, the above-mentioned Finger1 is “base station signal” (without relay station), the above-mentioned Finger2 is “relay station signal” ( It is understood that the transmission source can be determined with a reliability of 98% (normalized accumulated power P _C (τ _th ) = 0.98).

  When both of the two fingers capture only “base station signal” or “relay station signal”, the absolute determination as to whether the transmission source is the donor base station 10 or the relay station 14 remains as it is. It's not easy. However, according to the configuration of the present invention described below, the transmission source can be determined with high accuracy even in such a case. First, an outline common to the embodiments of the present invention will be described. FIG. 9 shows an environment in which the transmission source determination program in each embodiment of the present invention is executed. In FIG. 9, reference numeral 60 denotes a computer that executes the transmission source determination program in each embodiment of the present invention, 62 denotes a display that displays the output result of the computer 60, 64 denotes a recording device such as a disk of the computer 60, 71, 72, 73 and 74 are transmission source determination programs in the first, second, third, and fourth embodiments of the present invention, respectively, and 80 is a series of connection call information used in the transmission source determination programs 71, 72, and 74 (described later). A recorded call information recording database DB (call information recording unit) 100 is a measurement information recording database DB (measurement information recording unit) in which a series of measurement information (described later) used in the transmission source determination programs 73 and 74 is recorded. ). The functions common to the transmission source determination programs 71 to 74 are as follows. That is, in a predetermined CDMA mobile communication system using a relay station, it is acquired by the computer 60 by a plurality of path detection functions (referred to as “Finger1 etc.” as described in the background art) over a plurality of time zones. A series of observation samples obtained by aligning the series of information is obtained, and the transmission source of the signal received by Finger 1 or the like is made to the series of observation samples. Based on the series of provisional judgments, This is a function for determining whether a transmission source of a signal received by Finger 1 or the like is a base station or a relay station. As the predetermined CDMA mobile communication, a mobile communication WCDMA system and a mobile communication CDMA2000 system are suitable. Hereinafter, each embodiment will be described in detail with reference to the drawings.

  In the first embodiment, a transmission source determination program 71 for identifying the signal of the relay station 14 and the signal of the base station 10 using data acquired from the measurement system will be described. FIG. 10 shows a call connection in a mobile phone terminal (mobile station 12 in FIG. 1; hereinafter also referred to as mobile terminal 12) recorded in a call information recording database DB80 (hereinafter abbreviated as “call information recording DB80”). The time chart of a state and a non-connection state is shown. As shown in FIG. 10, the connection calls C1, C2, C3,. . . , Cn is defined as the time interval (dark shaded time interval) in the connection state from call connection to disconnection. On the other hand, unconnected calls ID1, ID2, ID3,. . . , IDn is defined by a time interval (light shaded time interval) in a non-connection state from when the call is disconnected until reconnection is made, including the Idle state. The connection call Ci (for example, C2) is composed of a series of information (C2-1, C2-2, C2-3,..., C2-k) acquired in a plurality of time zones in a predetermined time unit. Yes. In FIG. 10, the predetermined time unit is a time interval such as C2-1, and the plurality of time zones is k. An unconnected call, for example IDn, is also composed of a series of information (IDn-1, IDn-2, IDn-3, ..., IDn-m) acquired in a plurality of time zones in a predetermined time unit. . In FIG. 10, the predetermined time unit in the non-connected unit is a time section such as IDn-1, and the plurality of time zones is m. As shown in FIG. 10, in the call information recording DB 80, a series of information Ci-j of the connected call Ci and a series of information IDi-k of the unconnected call IDi are alternately recorded. Hereinafter, the information Ci-j shown in FIG. 10 is referred to as Finger Info data. The connection call C2 has k sets of Finger Info data.

  FIG. 11 exemplifies Finger info data Ci-j acquired from the mobile terminal 12. As shown in FIG. 11, the first row indicated by reference numeral 81 shows the acquisition date and time (2006 Sep 14 11: 42: 55.545) of Finger info data Ci-j (11:42:55 on September 14, 2006). Num_fing: 6 in the third row indicated by reference numeral 82 indicates that the total number of fingers is six. That is, the finger info data Ci-j is composed of data blocks 83, 84, 85, etc. acquired for each of a plurality (six in this example) of fingers. In FIG. 11, only the first part of the three blocks 83, 84 and 85 and the fourth block is shown for the convenience of the drawing. The first row of each block 83 etc. starts with finger [0], finger [1], fing [2], fing [3], etc., and records information indicating the states of Finger0, Finger1, Finger2, and Finger3, respectively. . Hereinafter, only the items necessary for understanding the configuration of the present invention will be described in the data block 83 obtained for each finger. First, finger_pos indicated by reference numeral 83a is a time relative position (position) of each finger from which data is acquired with reference to a standard time defined in a network of a predetermined CDMA mobile communication system. = 1/3840000 seconds) unit. For example, the relative time position of Finger0 is indicated as 71453. The same applies to finger_pos indicated by reference numerals 84a, 85a, etc., and the temporal relative position of Finger1 is indicated as 214581, and the temporal relative position of Finger2 is indicated as 71383. Next, CPICH Ec / Io TOTAL (dB) indicated by reference numeral 83b is Ec / Io (signal pair) of PSC (Primary scrambling code) which is a cell identification signal (predetermined signal in data) captured by Finger0. Interference noise energy ratio) (a predetermined value of a predetermined signal in the data. The unit is a logarithmic value in dB). For example, in Finger0, it is shown as -14.493 dB. The same applies to CPICH Ec / Io TOTAL (dB) indicated by reference numerals 84b, 85b, etc., which is −13.549 dB for Finger1 and −9.818 dB for Finger2. Prim_sc_code_idx indicated by reference numeral 83c indicates the cell identification number of the PSC. For example, it is 200 for Finger0. The same applies to prim_sc_code_idx indicated by reference numerals 84c, 85c, etc., which is 208 for Finger1 and 200 for Finger2.

FIG. 12 shows a processing outline and a transmission source determination method of the transmission source determination program 71 according to the first embodiment of the present invention for determining a relay station signal and a base station signal using data acquired from a measuring instrument such as the portable terminal 12. The flow is shown in a flowchart. As shown in FIG. 12, first, for each Finger info data Ci-j, each observation sample Si-j is obtained by aligning each block on the basis of the Ec / Io value (predetermined value) of PSC (observation sample). Acquisition step, step S100). Here, the observation sample Si-j corresponds to the Finger info data Ci-j. Next, a temporal relative position of a predetermined block in the observation sample Si-j acquired in the observation sample acquisition step (step S100) and a predetermined time in the observation sample Si- (j-1) immediately before the observation sample. Based on the temporal relative positions of the blocks, the transmission source of the signal received by the Finger corresponding to the predetermined block in the observation sample Si-j is determined for the series of observation samples Si-j (primary determination). Or a temporary determination step (step S200). The predetermined block is preferably a block in which the value of Ec / Io of PSC (the predetermined value of the predetermined signal in the data) is maximized. In the primary determination step (step S200), the finger of the target PSC
For each info data Ci-j, a determination for identifying the direct transmission source (relay station or donor base station) is performed. Finally, based on the determination of the transmission source for the series of observation samples Si-j performed in the primary determination step (step S200), the Finger corresponding to the block with the maximum PSC Ec / Io value in the connection call Ci is The transmission source of the received signal is determined (secondary determination step, step S300). That is, the signal received by Finger is identified for each connected call Ci. Hereinafter, each step S100, S200, and S300 will be described in detail.

Observation sample acquisition step (step S100).
FIG. 13 is a flowchart showing in detail the processing of the observation sample acquisition step (step S100). As shown in FIG. 13, first, for each Finger info data Ci-j of the connection call Ci recorded in the call information recording DB 80, a temporal relative position, a cell identification signal, and Ec / Io were extracted from each block. Organizing information Wi-j composed of organizing blocks is created (organizing step, step S110). That is, the above values are extracted from the finger info data Ci-j acquired in the mobile terminal 12 along the data time.

  Next, for each organizing information Wi-j created in the organizing step (step S110), an observation sample Si-j in which the organizing blocks are arranged in descending order of Ec / Io is obtained (alignment step, step S120). In other words, in each Finger info data Ci-j, the temporal relative positions of the PSC (used by the relay station) are arranged in the order of Ec / Io. That is, a plurality of blocks such as fing [0] are arranged in the order of Ec / Io. Here, the finger corresponding to the block having the highest Ec / Io is defined as the best finger. The observation sample Si-j is a set of information arranged as described above in one short time zone in which the Finger info data Ci-j is acquired.

  Subsequently, for each observation sample Si-j obtained in the alignment step (step S120), Ec / Io of the organizing block having the maximum Ec / Io (hereinafter referred to as “best block”) is a predetermined lower limit. It is determined whether or not the value is equal to or smaller than the value (step S130). If the value is equal to or smaller than the predetermined lower limit value, the observation sample Si-j is deleted from the connection call Ci (step S140). This is to improve the reliability of the temporal relative position. When the Best finger Ec / Io is equal to or lower than a predetermined lower limit (for example, -30 dB), the observation sample Si-j, which is data in that time zone, is deleted. Is to do. On the other hand, when Ec / Io of the best block exceeds a predetermined lower limit value, the temporal relative value (fing_pos) t of the observation sample Si-j in the best block and the observation sample Si- (j immediately before the observation sample Si-j A variation δ (fing_pos) between the temporal relative value (fing_pos) t−1 in the best block of (−1) is obtained (a variation calculation step, step S150). That is, with respect to the Finger info data Ci-j of the PSC, the temporal relative value in the block corresponding to the best finger of the current observation sample Si-j (ie, the best block) and the observation sample Si- (j−1) immediately before it. ) Is calculated as shown in the following equation 11 with respect to the temporal relative value that can be placed in the block corresponding to the best finger (ie, the best block).

  δ (fing_pos) = (fing_pos) t− (fing_pos) t−1 (11)

  If the determination in step S130 has not been completed for all the observation samples Si-j, the process returns to step S130 to repeat the process. If the determination has been completed, the process in the observation sample acquisition step (step S100) is terminated to perform a primary determination. Proceed to step (step S200).

Primary determination step (step S200).
FIG. 14 is a flowchart showing in detail the process of the primary determination step (step S200). In the primary determination step (step S200), for the observation sample Si-j of the connection call Ci, the cell identification signal received by the best finger (best path detection function) that is the finger corresponding to the best block of the observation sample Si-j. The transmission source is determined. As shown in FIG. 14, first, it is determined whether the finger info data Ci-j is connected or not (step S210). If it is determined in step S210 that it is in a connected state (a connected call), the following steps are started. On the other hand, if it is determined in step S210 that it is in a disconnected state (is a disconnected call), the determination is suspended and the primary determination step (step S200) ends.

Change amount calculation step when the change amount calculated in (step S150) δ (fing_pos) is the predetermined threshold value tau _th or more (a predetermined threshold value tau _th is used in the above-described <reference 1> and <criteria 2> It is the same as the predetermined threshold value τ _th .), A primary determination result for determining the transmission source of the cell identification signal captured by Best finger as the relay station 14 is obtained (relay station determination step; steps S220 and S230). That is, the cell identification signal is determined as a signal that has passed through the relay station 14. Thereafter, the process proceeds to step S270. On the other hand, when the change amount δ (fing_pos) obtained in the change amount calculation step (step S150) is equal to or less than the negative value −τ _th of the predetermined threshold, a primary determination result for determining the transmission source as the base station 10 is obtained. (Base station determination step. Steps S240 and S250). That is, the cell identification signal is determined as a signal that does not pass through the relay station 14. Thereafter, the process proceeds to step S270. When the change amount δ (fing_pos) obtained in the change amount calculation step (step S150) is less than the predetermined threshold value τ _th and larger than the negative value −τ _th of the predetermined threshold value, the transmission source is determined to be on hold (determination hold) Step, step S260). When the primary determination is not completed for all the observation samples Si-j of the connection call Ci, the process returns to the relay station determination step (step S220) and the process is repeated (primary determination repetition step, step S270). When the primary determination is completed for all the observation samples Si-j of the connection call Ci, the primary determination (step S200) is ended and the process proceeds to the secondary determination step (step S300). As is clear from the above description of the primary determination (step S200), the temporal relative value in the block corresponding to the Best finger of the current observation sample Si-j and the Best of the observation sample Si- (j-1) immediately preceding it. The amount of change δ (fing_pos) between the relative time values in the block corresponding to finger is calculated using Equation 1, and the object generated when the measurement system enters and exits the coverage area of the relay station 14 It can be seen that the change in the relative time value of PSC (or PN) can be detected effectively.

Secondary determination step (step S300).
In the secondary determination step (step S300), a determination is made on the observation sample (determination hold observation sample) Si-j for which the transmission source is determined to be hold in the determination hold step (step S260). Specifically, when an observation sample Si-j in which a primary determination result of “base station signal” or “relay station signal” exists within one connected call Ci section, the primary of the observation sample Si-j Using the determination result, the determination is performed for another observation sample Si-k having no primary determination result. On the other hand, the connection call Cp section in which the primary determination results are all on hold is determined in units of the connection call Cp section, and the determination result is applied to all the observation samples Cp-j in the connection call Cp section.

  FIG. 15 is a detailed flowchart showing the process of the secondary determination step (step S300). First, it is determined whether there is at least one observation sample Si-j from which the primary determination result obtained in the primary determination step (step S300) is obtained in the connection call Ci (step S310). When it is determined in step S310 that there is one or more observation samples Si-j from which the primary determination result is obtained, the determination before the first observation sample Si-f from which the primary determination result is obtained in the connection call Ci. The determination opposite to the primary determination result of the first observation sample Si-f is applied to the suspended observation sample. On the other hand, the same determination as the primary determination result of the nearest previous observation sample Si-q from which the primary determination result is obtained is applied to the determination pending observation sample after the first observation sample Si-f ( Determination application step (step S320). In either case, the process proceeds to step S390. For example, the temporary determination results of the observation samples Si-1, Si-2, Si-3, Si-4, and Si-5 in the connection call Ci are the determination hold, base station, determination hold, relay station, and determination hold, respectively. Suppose there was. In this case, the first observation sample from which the primary determination result is obtained in the connection call Ci is Si-2 (Si-f is Si-2). Therefore, the determination (relay station) opposite to the primary determination result (base station) of the first observation sample Si-2 is applied to the determination pending observation sample Si-1 before the first observation sample Si-2. . On the other hand, for the determination pending observation samples Si-3 and Si-5 after the first observation sample Si-2, the same determination as the primary determination result of the nearest previous observation sample from which the primary determination result was obtained. Apply. That is, for the determination pending observation sample Si-3, the same determination as the primary determination result (base station) of the nearest previous observation sample Si-2 (Si-q is Si-2) from which the primary determination result was obtained. (Base station), the primary determination result (relay) of the nearest previous observation sample Si-4 (Si-q is Si-4) from which the primary determination result was obtained for the determination pending observation sample Si-5 The same judgment (relay station) is applied. In another example, the temporary determination results of the observation samples Si-1, Si-2, Si-3, Si-4, and Si-5 of the connected call Ci relay station are the determination hold, the relay station, the determination hold, and the base station, respectively. In the case of pending determination, the base station determination is applied to Si-1, the relay station determination is applied to Si-3, and the base station determination is applied to Si-5. The reason for the above determination method is as follows. In the first embodiment, only the best finger is targeted, a change amount δ (fing_pos) of the temporal relative value of the current finger and the previous best finger is calculated, and the measurement system 12 enters and exits the coverage area of the relay station 14. It is the structure which detects the change of the time relative value of the object PSC which occurs at the time. For this reason, there is a high degree of accuracy with which it can be determined that the base station signal and the relay station signal are switched before and after the first primary determination result. On the other hand, for the determination pending observation sample after the first observation sample Si-f, the determination is finalized by prioritizing the primary determination result ahead.

  There is no observation sample Si-j from which the primary determination result by the primary determination step (step S200) is obtained in the connection call Ci, and the point where the information such as Finger Info data Ci-j is acquired is within a predetermined distance from the base station 10 (When geographically close to the base station 10), the transmission source of the cell identification signal received by the Best finger is determined as the base station for all determination pending observation samples in the connection call Ci (base station 2). Next determination step, steps S330 and S340). Thereafter, the process proceeds to step S390.

  There is no observation sample Si-j from which the primary determination result by the primary determination step (step S200) is obtained in the connection call Ci, and the point where the information such as the Finger Info data Ci-j is acquired is within the predetermined distance from the base station. If it is not present (when not geographically close to the base station 10), processing is performed as in the following unconnected call determination step (step S350).

Unconnected call determination step (step S350).
The same processing as that of the observation sample acquisition step (step S100) is performed on each information IDi-j in the non-connection call IDi immediately before the connection call Ci. Next, for each observation sample IDSi-j of the unconnected call IDi, the cell identification signal transmission source received by the Best finger of the observation sample IDSi-j is processed as follows.

  When the time difference between the observation sample IDSi-j and the observation sample IDSi- (j-1) immediately before the observation sample IDSi-j is equal to or longer than a predetermined time (for example, 5 seconds), or a change amount calculation step (step S150) When the change amount δ (fing_pos) obtained in (1) exceeds a predetermined threshold value (for example, 60 chips), the determination is impossible. That is, even if the change amount δ (fing_pos) ≧ τth = 2 μs, the determination is impossible when the change amount δ (fing_pos)> 60 chips = 15.6 μs. The reason for the above is that the temporal relative value of the mobile station 12 in the non-connected state (non-connected call IDi) is relatively fixed and easily changed in the same place as compared to the connected state (connected call Ci). In particular, the reason why the determination is impossible despite the large change amount δ (fing_pos) is as follows. When the power of the mobile station 12 is turned off / on in a disconnected state, the temporal relative value after the ON is randomly determined between 0 and 38,399 chips (depending on the algorithm of the mobile station), and the temporal relative value before the OFF The association (or continuity) with the value is lost. If the difference between the new time relative value of the mobile station and the time relative value of the previous observation sample is larger than expected, as in this example, there is no relationship between two consecutive observation samples. Judgment is impossible due to reasons.

  The time difference between the observation sample IDSi-j and the observation sample IDSi- (j-1) immediately before the observation sample IDSi-j is less than the predetermined time and is obtained in the change amount calculation step (step S150). When the amount of change is less than or equal to the other predetermined threshold, when the amount of change δ (fing_pos) obtained in the amount of change calculation step is greater than or equal to the predetermined threshold, the transmission source is determined as a relay station, and the amount of change δ ( When fing_pos) is less than or equal to the negative value of the predetermined threshold, the transmission source is determined to be a base station, and when the change amount δ (fing_pos) is less than the predetermined threshold and greater than the negative value of the predetermined threshold Judgment is impossible. The above is the unconnected call determination step (step S350).

  It is determined whether or not there is a determination in the unconnected call determination step (step S350) (step S360). If the determination is not impossible in step S360, the determination by the non-connection call determination step (step S350) is applied to all the determination pending observation samples in the connection call Ci as the transmission source of the cell identification signal received by the Best finger. (Non-connection call determination application step. Step S370). Thereafter, the process proceeds to step S390.

  On the other hand, when the determination is not possible in the non-connection call determination step (step S350), the non-connection call IDi is used as the transmission source of the cell identification signal received by Best finger for all the determination pending observation samples in the connection call Ci. The determination is applied to the nearest observation sample S (ip) -j or the like in which the determination of the transmission source of the cell identification signal received by Bestfinger is obtained, such as the earlier connection call Ci-p (proximity observation) Sample determination application step (step S380). In a situation where the determination is not finalized for the connected call Ci and there is no determination for the immediately preceding unconnected call IDi, the closest observed sample S (ip) obtained from the connected call Ci-p before the unconnected call IDi or the like. This is to apply the secondary determination result in −j etc. to all the observation samples Si−j of the connection call Ci.

  When determination or application of determination is not completed for all determination pending observation samples of the connection call Ci, the process returns to the determination application step (step S310) and the process is repeated (secondary determination repetition step, step S390). When the determination or application of the determination is completed for all the determination pending observation samples of the connection call Ci, the secondary determination step is ended.

  FIG. 16 shows an example of a result of identifying “base station signal” and “relay station signal” by the method of the first embodiment described above. The field measurement data is the same as that described with reference to FIGS. 25 and 26 in the background art, and the portions denoted by the same reference numerals in FIG. 16 as those in FIG. In FIG. 16, “/” and “•” indicate points determined as “relay station signal” or “base station signal”, respectively. The point where the determination is put on hold is unmarked. As is clear from FIG. 16, most of the points measured in the traveling route of the measurement vehicle indicated by the mesh pattern (inside the dotted ellipse 151) have obtained a determination result, and the point where the determination is put on hold (there is no mark, It appears that the line that follows with “/” or “•” appears as a break in the line.) As apparent from a comparison between FIG. 16 and FIG. 26, the RSCP measurement value difference between the area determined as the “relay station signal” in FIG. 16 and the relay operation function ON and OFF of the relay station 157 in FIG. It can be seen that the above-mentioned (rising) points are in good agreement with the dense area.

  As described above, according to the first embodiment of the present invention, first, each observation sample Si-j obtained by aligning each block with respect to each Finger info data Ci-j based on the value of Ec / Io of PSC is obtained. Next, the temporal relative position of the block (best block) in which the value of Ec / Io of the cell identification signal in the acquired observation sample Si-j is maximum and the observation sample Si- ( Based on the variation δ (fing_pos) between the best block and the relative time position of the best block in j-1), the transmission source of the signal received by the Best finger corresponding to the best block in the observation sample Si-j is determined. It performs with respect to a series of observation samples Si-j (primary determination step). In the primary determination step, determination is performed to identify the direct transmission source (relay station or donor base station) for each Finger info data Ci-j of the target PSC. Finally, based on the transmission source determination for the series of observation samples Si-j performed in the primary determination step, the transmission source of the signal received by the Best finger in the connection call Ci is determined (secondary determination step). In the first embodiment, only the best finger is targeted, a change amount δ (fing_pos) of the temporal relative value of the current finger and the previous best finger is calculated, and the measurement system 12 enters and exits the coverage area of the relay station 14. A change in the relative time value of the target PSC that occurs at the time is detected. For this reason, in the secondary determination, the determination is performed for the reason that it is highly accurate that it can be determined that the switching between the base station signal and the relay station signal occurs before and after the first primary determination result. On the other hand, for the determination pending observation sample after the first observation sample Si-f, the determination is finalized by prioritizing the primary determination result ahead. As described above, when cell optimization design is performed in the mobile communication WCDMA system and the mobile communication CDMA2000 system, a series of Finger info data Ci measured only once when PSC and PN are used as cell identification signals of the base station 10, respectively. Based on the measurement results of the connected call Ci and the unconnected call IDCi, etc. composed of -j etc. and IDi-j etc., it is possible to determine whether the transmission source of the received signal is the base station 10 or the relay station 14, A transmission source determination program 71 or the like that can clearly determine each coverage division between the station 10 and the relay station 14 can be provided. For this reason, when cell optimization design is performed in the mobile communication WCDMA system and the mobile communication CDMA2000 system, the cost of coverage determination work by the actual measurement data of the area where the relay station 14 is located is reduced, the accuracy of coverage determination is improved, and the problem There are significant advantages in terms of improving the certainty of solutions when they occur.

In the second embodiment, the transmission source determination program 72 uses not only the best finger in the primary determination but also the secondary best finger corresponding to the block having the second highest Ec / Io value of the cell identification signal in the observation sample Si-j. explain. That is, the Best finger corresponding to the block in which the Ec / Io value of the cell identification signal is maximum in the observation sample Si-j (the block in which the predetermined value of the predetermined signal is maximum), and the observation sample Si-j Then, the secondary best finger corresponding to the block having the second highest Ec / Io value of the cell identification signal (the block having the second predetermined value of the predetermined signal) is used. Specifically, the change amount δ (fing_pos) of the temporal relative value of both the current best finger and the secondary best finger is calculated individually, and in both cases, the change amount of the temporal relative value of opposite polarity and the same absolute amount is calculated. By detecting that δ (fing_pos) is exhibited, a primary determination result with higher reliability than that of the first embodiment can be obtained. Here, “the amount of change δ (fing_pos) of the temporal relative value having the opposite polarity and the same absolute amount is exhibited” is as follows. For example, the transmission source of the signal received by Best finger in the current (time t) observation sample Si-t is a base station, and the transmission source of a signal delayed by τ _th received by Secondary best finger is a relay station. The transmission source of the signal received by Best finger in observation sample Si- (t-1) at (time t-1) is a relay station, and the transmission source of the signal τ _th earlier received by Secondary best finger is a base station. Assumes something. In this case, the change amount δ (fing_pos) of the temporal relative value is −τ _{th for the} Best finger, while the change amount δ (fing_pos) of the temporal relative value is + τ _th for the Secondary best finger. That is, it is possible to detect that both the Best finger and the Secondary best finger exhibit a change amount δ (fing_pos) of the temporal relative value of opposite polarity (+ and −) and the same absolute amount (τ _th ).

  In the primary determination method according to the second embodiment, the magnitude relationship between the powers of the paths that give the maximum powers of the “base station signal” and the “relay station signal” (the best finger and the secondary best finger are respectively captured in descending order). It is obvious that the reliability is improved because the occurrence of the change of the number is detected. The configuration of the second embodiment can be realized as long as it is a measurement system that can provide two or more finger information to the same PSC (or PN). However, since the above method is premised on the existence of the secondary best finger, when the secondary best finger does not exist, the primary determination method in the first exemplary embodiment using only the best finger may be used in combination. The transmission source determination program 72 in the second embodiment executes the primary determination as described above, and executes the observation sample acquisition step and the secondary determination step in the same manner as in the first embodiment.

  As described above, according to the second embodiment of the present invention, not only the best finger in the primary determination but also the secondary best finger corresponding to the block having the second highest Ec / Io value of the cell identification signal in the observation sample Si-j. Also used. The amount of change δ (fing_pos) of the temporal relative value of both the current best finger and the secondary best finger is individually calculated. In both cases, the amount of change δ (fing_pos) of the temporal relative value of opposite polarity and the same absolute amount is calculated. ) Is detected, a transmission source determination program 2 or the like that can obtain a primary determination result with higher reliability than that of the first embodiment can be provided.

  In the third embodiment, data obtained from a measurement system (mobile terminal 12 or scanner (not shown)) that can provide relative delay information using two or more fingers to the same PSC (or PN) is used, and the relay station A transmission source determination program 73 for identifying a signal and a base station signal will be described. The scanner or the like can measure and record only control signals such as pilot signals of a plurality of cells and cell identification signals cyclically and continuously without performing call connection as in the first embodiment. FIG. 17A shows the power of each path of Finger1 and Finger2 that captures two paths of a path having the maximum power and a path having the next largest power among the multipaths of the same PSC (or PN). An example in which the value and the relative delay amount are measured by a scanner or the like and recorded in the measurement information recording DB 100 is shown. FIG. 17B shows an example of a determination result to which the method described in the third embodiment is applied. FIG. 17B is referred to as appropriate in the description of the determination result described later.

In FIG. 17A, reference numeral 101 denotes a measurement data number (NO) column for each observation sample Pj, 102 denotes a measurement time (TIME) column, 103 denotes a cell identification signal number (CH1_CODE) column, and 104 denotes a measurement target. The total received power (CH1-RSSI in the radio channel (CH1 in this example)) (in units of dBm: a logarithmic value with a power of 1 milliwatt as a reference 0 dBm) is a column. Subsequently, reference numeral 105 denotes a relative delay amount (CH1_F1_DLY. Unit: chip: minimum time period of instantaneous fluctuation of spread signal used in mobile communication CDMA system) between a reference path and a path captured by Finger1. Since Finger1 is the reference path, CH1_F1_DLY = 0. Reference numeral 106 denotes a power (CH1_F1_RSCP in the path captured by Finger1) column, and 107 denotes a relative delay amount (CH1_F2_DLY between the path captured by Finger1 and the path captured by Finger2 (in units of chips). Finger1 is a relative reference) column, and 108 is a power (CH1_F2_RSCP. Unit is dBm) column of the path captured by Finger2. Among the relative delay amounts in the CH1_F2_DLY column 107, the numerical value shown in bold (for example, the numerical value of 29.5 in the CH1_F2_DLY column 107 when the NO column 101 is 442), the absolute value of which is set in advance A case where a predetermined threshold value τ _th is exceeded is shown. Reference numerals in FIG. 17B will be described later as appropriate. The difference between the first embodiment (and 2) and the third embodiment is that, in the first embodiment, the primary determination is performed using the relative time value based on the standard time of the mobile communication CDMA system network. In Example 3, the primary determination is performed using the relative delay amount (the amount shown in the CH1_F2_DLY column 107) of each path captured by the two Finger1 and Finger2 described above.

  A series of information in the third embodiment is measured continuously and continuously by a scanner or the like as described above, and a series of measurement information F acquired in a plurality of time zones in a desired measurement time unit (predetermined time unit). It is composed of The series of measurement information F is recorded in a measurement information recording DB (measurement information recording unit) 100. Each measurement information Fj is obtained by Finger1 (first path detection function) and Finger2 (second path detection function) for separately detecting the first path having the maximum power and the second path having the next largest power among the multipaths. The power value of each path acquired at each measurement time and the relative delay amount of the two paths are included. Each measurement information Fj may include data other than these. The observed samples Pj (how to find out later) corresponding to each measurement information Fj are acquired in a plurality of time zones indicated by the NO column 101 in the measurement time units indicated by the TIME column 102 in FIG. Further, at least the power value of each path and the relative delay amount of the two paths are included. The value of the subscript j of the observation sample Pj may be the row number of the table shown in FIG. 17A, or the value of the NO column 101 (such as 442).

  FIG. 18 shows an outline of the processing of the transmission source determination program 73 and the transmission source determination method according to the third embodiment of the present invention for identifying a relay station signal and a base station signal using data acquired from a measuring instrument such as a scanner. The flow is shown in a flowchart. As shown in FIG. 18, first, each observation sample Pj that is aligned based on each measurement time for each measurement information Fj recorded in the measurement information record DB 100 is obtained (observation sample acquisition step, step S400). The observation sample acquisition step (step S400) is a process of organizing and manipulating measurement data. Relative delay (Δf_dly), total received power RSCP or signal-to-interference noise energy ratio (Ec / Io) defined by the difference in the relative delay amount of the path where the PSC (or PN) is captured by Finger1 and Finger2 from the measurement data Etc. are arranged in time order. The observation sample Pj is a set of information obtained by observing and organizing the information Fj in one short time zone as described above.

  Based on the relative delay amount (shown in the CH1_F2_DLY column 107) in the observation sample Pj acquired in the observation sample acquisition step (step S400) and a predetermined threshold, the transmission source of the signal received by Finger1 in the observation sample Pj Is determined for a series of observation samples Pj (primary determination or provisional determination step, step S500).

  The power value of the first path in the observation sample Pj (shown in the CH1_F1_RSCP column 106), the power value of the first path and the power value of the second path in the observation sample P (j-1) immediately before the observation sample Pj. (Shown in the CH1_F2_RSCP column 108) and a predetermined power difference threshold value, a replacement determination is made as to whether or not a replacement has occurred in the transmission source of the signal received by Finger1 in the observation sample Pj. Based on the replacement determination and the transmission source determination for the series of observation samples Pj performed in the primary determination step (step S500), the transmission source of the signal received by Finger1 for the observation sample Pj is determined again. Next, 1) a series of observations of the final determination of the transmission source of the signal received by Finger1 for the observation sample Pj based on the comparison between the relative delay amount in the observation sample Pj and the predetermined threshold and the re-determination This is performed on the sample Pj. Alternatively, 2) Finger1 receives the measurement sample Pj based on the comparison between the relative delay amount in the observation sample Pj and the predetermined threshold, the comparison of the power values of the paths in the observation sample Pj, and the re-determination. The final determination of the transmission source of the signal is performed on the series of observation samples Pj. The above is the secondary determination step (step S600). Hereinafter, the primary determination step (S500) and the secondary determination step (S600) will be described in detail.

Primary determination step (step S500).
The relative delay amount (Δf_dly) of the paths captured by Finger1 and Finger2 is defined by the following Expression 12 using the parameters shown in FIG.

D (f_dly) = CH1_F2_DLY−CH_F1_DLY = CH1_F2_DLY (12)

here,
CH1_F1_DLY: Relative delay amount of the path captured by Finger1 = 0
CH1_F2_DLY: Relative delay amount of the path captured by Finger2 (All are based on CH1_F1_DLY)

After the above data arrangement, primary determination is performed for each observation sample Pj as follows. FIG. 19 is a flowchart showing in detail the processing of the primary determination step (step S500) using each finger data from the measurement system that provides the relative delay amount to the PSC (or PN). In the primary determination step (step S500), the transmission source of the cell identification signal received by Finger1 is determined for the observation sample Pj acquired in the observation sample acquisition step (step S400). As shown in FIG. 19, first, when the relative delay amount (Δf_dly) of the observation sample Pj is equal to or larger than a predetermined threshold (τ _th ), a primary determination result for determining the transmission source as a base station is obtained (base Station determination step (steps S510, S520). Thereafter, the process proceeds to step S560. When the relative delay amount (Δf_dly) of the observation sample Pj is equal to or less than a negative value (−τ _th ) of a predetermined threshold, a primary determination result for determining the transmission source as a relay station is obtained (relay station determination step, step). S530, S540). Thereafter, the process proceeds to step S560. When the relative delay amount (Δf_dly) of the observation sample Pj is less than the predetermined threshold value (τ _th ) and larger than the negative value (−τ _th ) of the predetermined threshold value, the transmission source is determined to be on hold (determination hold step). Step S550). If the determination is not completed for all the observation samples Pj acquired in the observation sample acquisition step (step S400), the process returns to the base station determination step (step S510) and the process is repeated (primary determination repetition step, step S560). . When the determination is completed for all the observation samples Pj acquired in the observation sample acquisition step (step S400), the primary determination step (step S500) is ended. As described above, in the primary determination, a rough determination is made within a range in which it is possible to determine whether the path captured by Finger1 is a “base station signal” or a “relay station signal”. When the primary determination is finished, the secondary determination flow described below is entered. Here, the relay processing delay (τ _r ) of the relay station 14 in the above-described measurement example shown in FIG. 17 is 27 (chip, corresponding to about 7 μsec), and the predetermined threshold (τ _th ) is 22 (chip. In a mobile communication CDMA system, it is set to approximately 5.7 μsec). Reference numeral 110 in FIG. 17B indicates a primary determination result (F1 decision) column made for the observation sample Pj shown in FIG. F1
As shown in the decision column 110, for example, when the NO column 101 is an observation sample of 442, the relative delay amount (Δf_dly) is 29.5 chips in the CH1_F2_DLY column 107. Therefore, since 29.5 ≧ τ _th = 22 chips, the primary determination result is the base station (shown as “bts”). When the NO column 101 is the observation sample of 447, the relative delay amount (Δf_dly) is 9.0 chip in the CH1_F2_DLY column 107. Therefore, since 9.0 ≧ τ _th = 22 and not 9.0 ≦ −τ _th = −22, the primary determination result is pending determination (indicated by a blank). When the NO column 101 is the observation sample of 454, the relative delay amount (Δf_dly) is −29.0 chip in the CH1_F2_DLY column 107. Therefore, -29. Since ≧ τ _th = 22 rather than −29.0 ≦ −τ _th = −22 chips, the primary determination result is a relay station (shown as “rpt”).

Secondary determination step (step S600).
In the following description, a case will be described in which a measuring device configured to preferentially capture a path of maximum power by one specific finger (for example, Finger1) is preferentially described. In the secondary determination, for all the observation samples Pj including the observation samples whose determination is suspended in the primary determination for the path captured by Finger1, whether the path first captured by Finger1 is a “base station signal” or “relay station” Re-determination is performed to determine again whether the signal is a “signal” based on the relationship between the previous and next time points. Finally, a final determination is performed to determine whether the path with the highest power at all measurement points is the “base station signal” or the “relay station signal”.

  20 and 21 show in detail the processing of the secondary determination step (step S600). For convenience of drawing, the secondary determination step (step S600) is divided into two drawings. The external connector A in FIG. 20 is connected to the external connector A in FIG. 21, and the external connector B in FIG. It is connected to the external connector B in FIG. First, in the current observation sample Pt and the previous observation sample P (t−1), the Finger1 signal capturing the PSC (or PN) is changed from the “base station signal” path to the “relay station signal” path. Or the time point of the observation sample Pt at which the switching from the “relay station signal” path to the “base station signal” path occurs is defined as “Turning Point” (hereinafter referred to as “TP”). Determine when it occurred. Specifically, between Finger1 in the observation sample Pt at the current time t and Finger1 in the observation sample P (t-1) at the previous time point t-1, and between Finger1 in the observation sample Pt at the current time t and the previous time point t-1. When the power difference (dB) of the direct power (RSCP value) of the path captured by each Finger is calculated with Finger 2 in the observation sample P (t−1), and the following Expressions 13 and 14 are satisfied It is determined that the current time t is the time when TP occurs.

(Finger1 RSCP) _t − (Finger1 RSCP) _t−1 > δ _1th dB (13)
| (Finger1 RSCP) _t − (Finger1 RSCP) _t−1 | <δ _2th dB (14)
here,
(Finger1 RSCP) _t : RSCP value of Finger1 in the observation sample Pt at the current time t
(Finger1 RSCP) _t-1 : RSCP value of Finger1 in the observation sample P (t-1) at the previous time point t-1.
(Finger2 RSCP) _t-1 : This is the RSCP value of Finger2 in the observation sample P (t-1) at the previous time point t-1, and the unit is dBm. further,
δ _1th : First power difference threshold (unit: dB)
δ _2th : second power difference threshold (unit: dB)
| · |: Absolute value.

By setting as in Expressions 13 and 14, in the observation sample Pt at the current time t, the power value (Finger1 RSCP) _{t of} the path captured by Finger1 becomes Finger1 in the observation sample P (t−1) at the previous time point t−1. The power value (Finger1 RSCP) _{t-1 of} the path to be captured increases abruptly (the increase is _greater than or _equal to the first power difference threshold value δ _1th ), and the observation sample P (t−1) at the previous time point t−1 The power value (Finger2 RSCP) _t of the path captured by Finger2 is close to the power value (Finger1 RSCP) _t of the path captured by Finger1 in the observation sample Pt at the current time t (the difference is within the second power difference threshold δ _2th ) Under the condition, the event that the path with the large power value captured by Finger2 in the observation sample P (t-1) at the previous time point t-1 has changed to Finger1, that is, the occurrence of TP is detected. You can see that Incidentally, it has been empirically known that the first and second power difference threshold _values δ _1th and δ _2th may be about 10 dB each. The above TP generation criterion (Equations 13 and 14) is applied to a measuring instrument configured to preferentially capture a maximum power path in a specific finger (Finger 1 in the above example). It is. However, in the case of a measuring instrument that does not have such a configuration, it is self-evident that in the description of the determination criterion, it is necessary to add a determination criterion in which Finger1 and Finger2 are interchanged as a logical sum condition.

Summarizing the above, as shown in FIG. 20, with respect to the observation sample Pt acquired in the observation sample acquisition step (step S400), the power value (Finger1 RSCP) _{t of} Finger1 (first path) and the observation sample Pt The difference between the power value of Finger1 (Finger1 RSCP) _{t-1 in the} immediately preceding observation sample P (t-1) is _greater than the first power difference threshold δ _1th and the power value of Finger1 (Finger1 RSCP) _t and the observation sample When the absolute value of the difference from the power value (Finger2 RSCP) _t-1 of the previous observation sample P (t-1) with Finger2 (second path) _t-1 is smaller than the second power difference threshold δ _2th , It is determined that a change (TP) has occurred in the transmission source of the cell identification signal received by Finger1 at time t (replacement determination step, step S610). Reference numeral 111 in FIG. 17B indicates a determination point (Turning point TP) column at the time of occurrence of TP performed on the observation sample Pj shown in FIG. As shown in the Turning point TP column 111, for example, when the NO column 101 is an observation sample of 445, the power value of Finger1 (Finger1 RSCP) _{t at} the current time t is −84.8 dBm in the CH1_F1_RSCP column 106, and the previous time t Finger _-1 power value (Finger1 RSCP) _{t−1 at} −1 is −95.7 dBm in the CH1_F1_RSCP column 106 when the NO column 101 is an observation sample of 444. Therefore, −84.8 − (− 95.7) = 10.9> δ _1th = 10 dB, and Expression 13 is established. Finger2 power value (Finger2 RSCP) _t-1 at the immediately preceding time point t-1 is -81.7 dBm in the CH1_F2_RSCP column 108 when the NO column 101 is an observation sample of 444. Accordingly, | −84.8 − (− 81.7) | = | −3.1 | = 3.1 <δ _2th = 10 dB, and Expression 14 is also established. For this reason, it is determined that TP has occurred, and “TP?” Is described in the Turning point TP column 111.

  Next, for the observation sample Pt for which the determination is suspended in the determination suspension step (step S550), it is not determined that the replacement has occurred in the replacement determination step (step S610) and the observation sample P (immediately before the observation sample Pt ( When the primary determination result is obtained in t-1), the same determination as the primary determination result of the immediately preceding observation sample P (t-1) is applied to the observation sample Pt (steps 630 and S640). . On the other hand, when it is determined in the replacement determination step (step S610) that the replacement has occurred, the observation sample P (t + k) obtained from the primary determination result first after the observation sample Pt is obtained for the observation sample Pt. The same determination as the primary determination result is applied (step S620). The above steps S630, S640, and S620 are redetermination steps. Thereafter, the process proceeds to step S660 of FIG. Reference numeral 112 in FIG. 17B indicates a determination result when the occurrence of TP is considered. For example, when the NO column 101 is an observation sample of 452, the determination is suspended as shown in the F1 decision column 110. Since TP has occurred as shown in Turning point TP column 111, NO column 101 is the primary determination result of the observation sample of 454. A certain rpt (relay station) is applied to an observation sample whose NO column 101 is 452. As a result, rpt (relay station) is described in the determination result (F1 decision after considering TP effect) column 112 indicated by reference numeral 112. When the NO column 101 is an observation sample of 447, the determination is suspended as shown in the F1 decision column 110. As shown in the Turning point TP column 111, TP is not generated, and the primary determination result is bts (base station) in the observation sample in which the immediately preceding NO column 101 is 446. For this reason, the same determination as bts (base station), which is the primary determination result of the observation sample in which the immediately preceding NO column 101 is 446, is applied to the observation sample in which the NO column 101 is 447. As a result, Fts decision after considering TP effect column 112 is described as bts (base station).

  In the re-determination step (steps S630, S640, and S620), it is not determined that the replacement has occurred in the replacement determination step (step S610), and the primary determination result is obtained for the observation sample P (t-1) immediately before the observation sample Pt. If not, the same determination as the primary determination result of the nearest observation sample P (t−m) obtained as the primary determination result before the observation sample Pt is applied to the observation sample Pt (again). Determination step, step S650). Thereafter, the process proceeds to step S660 of FIG. When the NO column 101 is 450 observation samples, as shown in the F1 decision column 110, the determination is blank (pending). As shown in the Turning point TP column 111, no TP is generated, and the primary determination result is not obtained in the observation sample in which the immediately preceding NO column 101 is 449. For this reason, for the observation sample whose NO column 101 is 450, the closest NO column 101 from which the NO column 101 was obtained before the 450 observation sample is the primary determination result of the 448 observation sample is the closest bs. The same judgment as (base station) is applied. As a result, the base station (bts) is described in the Decision for all F1 column of reference numeral 113 indicating the re-determination result. The Decision for all F1 column 113 shows a determination result obtained by combining the determination result obtained in the redetermination step (steps S630, S640, and S620) and the result obtained in the redetermination step (step S650).

As shown in FIG. 21, when the absolute value (| Δf_dly |) of the relative delay amount of the observation sample Pt acquired in the observation sample acquisition step (step S400) is not equal to or greater than a predetermined threshold (τ _th ), re-determination is performed. The determination applied to the observation sample Pt in the step (steps S630, S640, and S620) or the re-determination step (step S650) is set as the final determination (determination pending observation sample final determination step, step S670). Thereafter, the process proceeds to step S690. As a basis for configuring the determination method in this way, at this time, the signal captured by Finger1 and Finger2 is one path of the identification signal transmitted from the same station (only one of the base station 10 or the relay station 14). It is highly possible that this is a delay path.

On the other hand, when the absolute value (| Δf_dly |) of the relative delay amount of the observation sample Pt acquired in the observation sample acquisition step (step S400) is equal to or larger than a predetermined threshold (τ _th ), the power value (Finger1) in Finger 1 RSCP) When _t is smaller than the power value at Finger 2 (Finger2 RSCP) _t , the reverse determination of the primary determination result obtained in the primary determination step (step S500) is applied to the observation sample Pt as the final determination (step S675, S685). Since it can be concluded that Finger 2 has captured the path having the maximum power, the reverse of the primary determination result is the final determination (whether the identification signal with the maximum power in the observation sample Pt is the “base station signal”). It is applied as a “relay station signal” determination. On the other hand, when the power value in Finger 1 (Finger1 RSCP) _t is not smaller than the power value in Finger 2 (Finger2 RSCP) _t , the primary determination result obtained in the primary determination step (step S500) is used as the final determination, and the observation sample Pt Apply to This means that since it can be concluded that Finger1 has captured the path having the maximum power, the primary determination result is applied as it is as the final determination result of the observation sample Pt. The above steps S670, S680, and S685 are final determination steps. If the final determination is not completed for all the observation samples Pt acquired in the observation sample acquisition step (step S400), the process returns to the replacement determination step (step S610) and repeats the process (secondary determination repetition step). S690). When the final determination is completed for all the observation samples Pt acquired in the observation sample acquisition step (step S400), the secondary determination is ended. The column indicated by reference numeral 114 in FIG. 17B indicates the final decision result (Final decision for best signal). In the Decision for all F1 column 113 of the observation sample in which the NO column 101 is 442, bts (base station) is indicated. However, the absolute value of the relative delay amount (= 29.5) indicated by the CH1_F2_DLY column 107 of the observation sample is equal to or greater than a predetermined threshold (= 22), and the power value at Finger1 indicated by the CH1_F1_RSCP column 106 (= − 92.9) is smaller than the power value (= −80.3) in Finger 2 indicated in the CH1_F2_RSCP column 108. For this reason, as shown in the Final decision for best signal column 114, the determination of rpt (relay station) opposite to bts (base station), which is the determination obtained from the primary determination result, is the final determination.

Hereinafter, some other examples illustrated in FIG. 17B will be described. When the NO column 101 is the observation sample of 445, the conditions of Expressions 13 and 14 are satisfied, and it is determined that TP is generated. In this case, since the primary determination regarding Finger1 is not put on hold, this determination of the occurrence of TP is ignored. As described above, TP is also generated for the observation sample whose NO column 101 is 452. In the Decision for all F1 column 113, it can be seen that the NO column 101 at the immediately preceding time point is 451 observation samples, and the base station changes to the relay station. In the Final decision for best signal column 114, if the condition that the absolute value (| Δf_dly |) of the relative delay amount is equal to or greater than a predetermined threshold (τ _th ) is satisfied in step S660 of FIG. It can be seen that when the power value CH1_F1_RSCP is smaller than the power value CH1_F2_RSCP of the path captured by Finger2, the decision result in the Decision for all F1 column 113 is shown in the Final decision for best signal column 114. When the above condition is not satisfied, it can be confirmed that the determination result in the Decision for all F1 column 113 is applied to the Final decision for best signal column 114 as it is.

  When the results of the final decision for best signal column 114, which is the final determination result obtained by the above determination flow, are viewed comprehensively, the NO column 101 is relayed with the base station signal (bts) in the observation sample interval of 442 to 450. The station signal (rpt) alternates, but the NO column 101 is stable to the relay station signal (rpt) after the time point of the observation sample with 451. From this, it is easy to estimate that the measurement point of this measurement example is gradually shifting from the area where the coverage of the services of the base station 10 and the relay station 14 overlaps to the service area of the relay station 14 Can do.

  FIG. 22 shows an example of a result of discriminating “base station signal” and “relay station signal” for each observation sample. The field measurement data is the same as that described with reference to FIGS. 25 and 26 in the background art, and the portions denoted by the same reference numerals in FIG. 22 as those in FIG. The notation format of FIG. 22 and the target measurement data are both the same as in FIG. As is clear from FIG. 22, there are no measurement points (blanks) that have been put on hold on the travel route of the measurement vehicle indicated by the mesh pattern (inside the dotted ellipse 151), and the determination results for the entire continuous measurement area without interruption. It can be seen that the service area of the relay station 157 has been divided. When comparing FIG. 22 and FIG. 26 as in FIG. 16, the area determined as “relay station signal” in FIG. 22 is the RSCP measurement between the relay operation function ON and OFF of the relay station 157 in FIG. It can be seen that the value difference is in good agreement with a dense area at a point where the value difference is 4 dB or more (rise) or more.

  As described above, according to the third embodiment of the present invention, data acquired from a measurement system that can provide relative delay information using two or more fingers for the same PSC (or PN) is used. First, the transmission source determination program 73 obtains each observation sample Pj in which the alignment processing is performed on each information Fj recorded in the measurement information recording DB 100 based on each measurement time. That is, the relative delay (Δf_dly) defined by the difference between the relative delay amounts of the paths where the PSC (or PN) is captured by Finger1 and Finger2 from the measurement data, the total received power RSCP or the signal to interference noise energy ratio (Ec / Io) etc. are arranged in time order. Based on the relative delay amount (shown in the CH1_F2_DLY column 107) in the acquired observation sample Pj and a predetermined threshold value, the determination of the transmission source of the signal received by Finger1 at the observation sample Pj is made into a series of observation samples Pj. (Primary judgment). The third embodiment is characterized in that the primary determination is performed using the relative delay amount (the amount shown in the CH1_F2_DLY column 107) of each path captured by the two Finger1 and Finger2. The power value of Finger1 in the observation sample Pj (shown in the CH1_F1_RSCP column 106), the power value of Finger1 and the power value of Finger2 in the observation sample P (j-1) immediately before the observation sample Pj (shown in the CH1_F2_RSCP column 108) ) And a predetermined power difference threshold value, a change determination is made as to whether or not a change has occurred in the transmission source of the signal received by Finger1 in the observation sample Pj. Based on the replacement determination and the transmission source determination for the series of observation samples Pj performed in the primary determination, the transmission source of the signal received by Finger1 for the observation sample Pj is determined again. Next, 1) a series of observations of the final determination of the transmission source of the signal received by Finger1 for the observation sample Pj based on the comparison between the relative delay amount in the observation sample Pj and the predetermined threshold and the re-determination This is performed on the sample Pj. Alternatively, 2) Finger1 receives the measurement sample Pj based on the comparison between the relative delay amount in the observation sample Pj and the predetermined threshold, the comparison of the power values of the paths in the observation sample Pj, and the re-determination. The final determination of the transmission source of the signal is performed on the series of observation samples Pj (secondary determination). As described above, when cell optimization design is performed in the mobile communication WCDMA system and the mobile communication CDMA2000 system, when each PSC and PN is used as the cell identification signal of the base station 10, it is composed of a series of information F measured only once. Transmission that can determine whether the transmission source of the received signal is the base station 10 or the relay station 14 based on the measurement result, and can clearly determine each coverage division between the base station 10 and the relay station 14 A source determination program 73 and the like can be provided. For this reason, when cell optimization design is performed in the mobile communication WCDMA system and the mobile communication CDMA2000 system, the cost of coverage determination work by the actual measurement data of the area where the relay station 14 is located is reduced, the accuracy of coverage determination is improved, and the problem There are significant advantages in terms of improving the certainty of solutions when they occur.

  In the fourth embodiment, the transmission source determination program 71 or 72 of the first or second embodiment is executed in the section of the connection call Ci, and the transmission for executing the transmission source determination program 73 of the third embodiment is executed in the section of the unconnected call IDi. The source determination program 74 will be described. In general, in the system operation of the mobile terminal 12, the mobile terminal 12 constantly observes the communication status in the section of the connected call Ci, and therefore the frequency of the determination result is high. On the other hand, in the section of the unconnected call IDi, Since the intermittent reception operation is performed to suppress the consumption of the accumulated power energy, the frequency of the determination result is reduced. Therefore, in the case of using the measurement data obtained from the mobile terminal 12 in the first or second embodiment, since the frequency of the determination result is extremely high in the section of the connection call Ci, the reliability of the determination result is high, but the reverse In addition, since the frequency of the determination result decreases in the non-connected call section, the reliability of the determination result is relatively low. On the other hand, the frequency of obtaining the determination result in Example 3 using measurement data of a measuring instrument such as a scanner that detects the relative delay is intermediate between the above two types of frequencies. In other words, since only the control signals such as pilot signals of a plurality of cells are measured cyclically and continuously without performing call connection in a scanner or the like, the frequency of the determination result per control signal of one cell is Become. Therefore, the reliability is intermediate between the above two types.

  As described above, according to the fourth embodiment of the present invention, the transmission source determination program 74 causes the transmission source determination program 71 or 72 of the first or second embodiment to be executed in the section of the connected call Ci, and is executed in the section of the unconnected call IDi. The transmission source determination program 73 of Example 3 is executed. As a result, the advantages of the first to third embodiments can be extracted.

  FIG. 23 is a block diagram showing an internal circuit 120 of the computer 60 that executes the computer program (transmission source determination programs 71 to 74) of the present invention for realizing the above-described embodiments. As shown in FIG. 23, the CPU 121, ROM 122, RAM 123, image control unit 125, controller 126, input control unit 128, and external interface (I / F) unit 130 are connected to a bus 131. In FIG. 23, the transmission source determination program 71 and the like of the present invention described above are recorded in a recording medium (including a removable recording medium) such as a ROM 122, a recording device 64 such as a disk, or a CD-ROM 127. The recording device 64 records the call information recording DB 80 and the measurement information recording DB 100 described above. The transmission source determination program 71 of the present invention is loaded from the ROM 122 via the bus 131 or from the recording medium such as the recording device 64 or CD-ROM 127 via the controller 126 to the RAM 123 via the bus 131. The input control unit 128 is connected to an input operation unit 129 such as a mouse or a numeric keypad, and performs input control and the like. The VRAM 124 that is an image memory has a capacity corresponding to the data capacity of at least one screen of the display device 62 of the computer 60, and the image control unit 125 converts the data in the VRAM 124 into image data and sends it to the display device 62. It has a function to do. The external I / F unit 130 has an input / output interface function with the outside.

  As described above, the CPU 121 executes the transmission source determination program 71 and the like of the present invention, thereby achieving the object of the present invention. The transmission source determination program 71 and the like can be supplied to the computer CPU 121 in the form of a recording medium such as the CD-ROM 127 as described above, and the recording medium such as the CD-ROM 127 on which the transmission source determination program 71 and the like are recorded is also the same. It constitutes the invention. As a recording medium on which the transmission source determination program 71 or the like is recorded, for example, a memory card, a memory stick, a DVD, an optical disk, an FD, or the like can be used in addition to the recording medium described above.

  Examples of the use of the present invention include application to mobile communication WCDMA systems and mobile communication CDMA2000 systems.

FIG. 3 is a diagram showing a model of a radio wave propagation path from a base station to a mobile station when no relay station is present. As an example, it is a graph showing an example of a normalized delay profile and normalized accumulated power when σ _τ = 0.5 μsec. FIG. 3 is a diagram showing a model of a radio wave propagation path from a base station to a mobile station when a relay station exists. FIG. 3 is a diagram showing a model of a radio wave propagation path from a base station to a mobile station when a relay station exists. Table 30 summarizing combinations of routes passing through relay stations / not passing through relay stations and their delay differences from the set of routes (P1, P2, P3, P4 and P5) modeled in FIGS. 3 and 4 according to cases. FIG. FIG. 3 is a diagram illustrating a radio wave propagation path modeled on a two-dimensional coordinate including a horizontal axis (X axis) and a vertical axis (Y axis) when a separation distance between a relay station and a donor base station is 2 km. FIG. 7 is a diagram showing a three-dimensional graph 40 showing a result of calculating a radio wave propagation delay difference τ _d between the path P3 and the path P2 of FIG. FIG. 7 is a diagram illustrating a two-dimensional graph 50 showing a result of calculating a radio wave propagation delay difference τ _d between the path P3 and the path P2 of FIG. It is a figure which shows the environment where the transmission source determination program in each Example of this invention is performed. It is a figure which shows the time chart of the connection state of the call in the mobile telephone terminal 12 recorded on call information recording DB80, and a non-connection state. It is a figure which illustrates Finger info data Ci-j acquired from the mobile telephone terminal. It is a flowchart which shows the process outline | summary of the transmission source determination program 71 in Example 1 of this invention which discriminate | determines a relay station signal and a base station signal using the data acquired from measuring devices, such as a portable terminal. It is a flowchart which shows the process of an observation sample acquisition step (step S100) in detail. It is a flowchart which shows the process of a primary determination step (step S200) in detail. It is a flowchart which shows the process of a secondary determination step (step S300) in detail. It is a figure which shows the example of the result of having identified the "base station signal" and the "relay station signal" by the method of the present Example 1 mentioned above. Among the multipaths of the same PSC (or PN), the power value and relative delay amount of each path of Finger1 and Finger2 that captures two paths of the path having the maximum power and the path having the next largest power It is a figure which shows the example and determination result example which were measured with the measuring device called a scanner, and were recorded on measurement information recording DB100. It is a flowchart which shows the process outline | summary of the transmission source determination program 73 in Example 3 of this invention which identifies a relay station signal and a base station signal using the data acquired from measuring devices, such as a scanner. It is a flowchart which shows the detail of the process of the primary determination step (step S500) using each Finger's data from the measurement system which provides a relative delay amount with respect to PSC (or PN). It is a flowchart which shows the process of a secondary determination step (step S600) in detail. It is a flowchart which shows the process of a secondary determination step (step S600) in detail. FIG. 27 is a diagram illustrating an example of a result of discriminating a “base station signal” and a “relay station signal” for each observation sample using the actual field measurement data examples of FIGS. 25 and 26 described in the background art. It is a block diagram which shows the internal circuit 120 of the computer 60 which performs the computer program (transmission source determination program 71 thru | or 74) of this invention for implement | achieving each described Example. It is a figure which shows the example of the waveform after de-spreading of the cell identification signal which passed two paths from the order with big electric power in multipath, and the correspondence of Finger1 and Finger2 which capture these. It is the map which showed the topographical situation regarding the altitude of the area | region containing the service area of the measurement object in a mobile communication WCDMA system in a three-dimensionally shaded manner. In the service area to be measured shown in FIG. 25, the effective service area of the relay station 157 is determined by measuring the radio wave in the state where the relay operation function of the relay station is turned on (actuated) / off (stopped). It is a figure which shows the example actually measured. It is a figure which shows the determination result at the time of applying the conventional determination method mentioned above in the service area of the measurement object shown by FIG. It is a conceptual diagram of the service area in the case where determination is not possible and the case where it is possible.

Explanation of symbols

10, 155 Base station, 12, 160 Mobile terminal, 14, 157 Relay station, 20, 22, 24 Reflected object, 30 Combination of route through / without relay station and delay difference according to case Table, 31 case classification column, 32 path combination column, 33 radio wave propagation delay difference column, 34 remarks column, 40 three-dimensional graph of propagation delay difference calculation result, 50 two-dimensional graph of propagation delay difference calculation result , 60 computer, 62 display, 64 recording device, 71, 72, 73, 74 transmission source determination program, 80 call information recording DB, 81 first row, 82 third row, 83, 84, 85 block, 83a, 84a, 85a fing_pos, 83b, 84b, 85b CPICH Ec / Io TOTAL, 83c, 84c, 85c prim_sc_code_idx, 100 measurement information record DB, 101 NO column, 102 TIME , 103 CH1_CODE column, 104 CH1_RSSI column, 105 CH1_F1_DLY column, 106 CH1_F1_RSCP column, 107 CH1_F2_DLY column, 108 CH1_F2_RSCP column, 110 F1
decision field, 111 Turning point (TP) field, 112 F1 decision after considering TP effect field, 113 Decision
for all F1 column, 114 Final decision for best signal column, 120 internal circuit, 121 CPU, 122 ROM, 123 RAM, 124 VRAM, 125 image control unit, 126 controller, 127 CD-ROM, 128 input control unit, 129 input operation Part, 130 external I / F part, 131 bus, 151 dotted ellipse, 152, 153, 154 cell directivity, 156 quadrilateral.

Claims (13)

In a predetermined CDMA mobile communication system using a relay station, a computer is caused to obtain a series of observation samples obtained by performing an alignment process on a series of information acquired by a plurality of path detection functions over a plurality of time zones. The transmission source of the signal received by the predetermined path detection function for the observation sample is provisionally determined, and the transmission source of the signal received by the predetermined path detection function for the observation sample based on the series of temporary determinations is the base station. A transmission source determination program for determining whether a relay station is used,
A connection call indicating a time interval in a connection state from call connection to disconnection is composed of the series of information acquired in a plurality of time zones in a predetermined time unit, and each information is acquired for each of the plurality of path detection functions. Each block is composed of a block of data, and each block has a time relative position at which the data is acquired with reference to a standard time determined by a predetermined CDMA mobile communication system and a predetermined value of a predetermined signal in the data Including
An observation sample acquisition step for obtaining each observation sample in which each block is aligned based on the predetermined value for each piece of information;
Based on the temporal relative position of the predetermined block in the observation sample acquired in the observation sample acquisition step and the temporal relative position of the predetermined block in the observation sample immediately before the observation sample, the predetermined block in the observation sample A primary determination (or tentative determination) step for determining a transmission source of a signal received by a path detection function corresponding to a series of observation samples;
A secondary determination step of determining a transmission source of a signal received by the path detection function corresponding to the predetermined block in the connection call based on the determination of the transmission source for the series of observation samples performed in the primary determination step. ,
The predetermined block is a block in which a predetermined value of the predetermined signal is maximum,
The series of information on the connected call and the series of information on the non-connected call indicating a time interval in a non-connection state from disconnection to connection of the call are alternately recorded in the call information recording unit, and the predetermined signal is a cell identification signal. And the predetermined value is a signal to interference noise energy ratio;
The observation sample acquisition step includes:
Arrangement for creating arrangement information composed of arrangement blocks obtained by extracting temporal relative values, cell identification signals, and signal-to-interference noise energy ratios from each block for each information of the connected call recorded in the call information recording unit. Steps,
For each organizing information created in the organizing step, an aligning step for obtaining observation samples in which organizing blocks are arranged in descending order of signal to interference noise energy ratio;
For each observation sample obtained in the alignment step, if the signal-to-interference noise energy ratio of the best block, which is the organizing block with the largest signal-to-interference noise energy ratio, is equal to or lower than a predetermined lower limit value, the observation sample is connected When it is deleted from the call and the signal-to-interference noise energy ratio of the best block exceeds a predetermined lower limit value, the temporal relative value of the observed sample in the best block and the time in the best block of the observed sample immediately before the observed sample A change amount calculating step for obtaining a change amount between the relative value and the relative value,
In the primary determination step, the cell identification signal transmission source received by the best path detection function, which is the path detection function corresponding to the best block of the observation sample, for the observation sample of the connection call,
When the amount of change obtained in the change amount calculating step is equal to or greater than a predetermined threshold, a relay station determination step for obtaining a primary determination result for determining the transmission source as a relay station;
A base station determination step for obtaining a primary determination result for determining that the transmission source is a base station, when the change amount obtained in the change amount calculation step is equal to or less than a negative value of the predetermined threshold;
When the amount of change obtained in the change amount calculating step is less than the predetermined threshold and greater than a negative value of the predetermined threshold, a determination hold step for determining that the transmission source is hold;
If the determination has not been completed for all the observation samples of the connection call, the primary determination repetition step of repeating the process by returning to the relay station determination step,
In the secondary determination step, for the determination pending observation sample that is the observation sample determined to hold the transmission source in the determination suspension step,
When there is an observation sample in which a primary determination result obtained in the primary determination step is obtained in a connection call, the determination pending observation sample before the first observation sample in which the primary determination result is obtained in the connection call Apply the opposite judgment to the primary judgment result of the first observation sample, and the primary judgment result of the nearest previous observation sample that obtained the primary judgment result for the judgment pending observation sample after the first observation sample A determination applying step for applying the same determination as
When there is no observation sample from which the primary determination result by the primary determination step is obtained in the connection call and the point where the information is acquired is within a predetermined distance from the base station, for all determination pending observation samples in the connection call A base station secondary determination step of determining the transmission source of the cell identification signal received by the best path detection function as a base station;
If there is no observation sample from which the primary determination result obtained by the primary determination step is obtained in the connected call and the point where the information is acquired is not within the predetermined distance from the base station, each of the unconnected calls immediately before the connected call The same processing as the observation sample acquisition step is performed on the information, and for each observation sample of the unconnected call, for the transmission source of the cell identification signal received by the best path detection function of the observation sample,
When the time difference between the observation sample and the observation sample immediately before the observation sample is a predetermined time or more or when the amount of change obtained in the amount of change calculation step exceeds a predetermined other threshold, it is not possible to determine,
When the time difference between the observation sample and the observation sample immediately before the observation sample is less than a predetermined time, and when the change amount obtained in the change amount calculation step is equal to or less than the predetermined other threshold value, the change amount When the amount of change obtained in the calculation step is greater than or equal to the predetermined threshold, the transmission source is determined as a relay station, and when the amount of change is less than or equal to the negative value of the predetermined threshold, the transmission source is A non-connection call determination step in which it is determined that the station is a station and the determination is impossible when the amount of change is less than the predetermined threshold and greater than a negative value of the predetermined threshold;
If determination is not impossible in the non-connection call determination step, the non-connection call determination step serves as a transmission source of the cell identification signal received by the best path detection function for all determination pending observation samples in the connection call. An unconnected call determination application step for applying the determination;
If it is determined that the determination is not possible in the unconnected call determination step, the connection before the unconnected call is used as a transmission source of the cell identification signal received by the best path detection function for all determination pending observation samples in the connected call. A proximity observation sample determination applying step that applies a determination on the closest observation sample that is a call and the determination of the transmission source of the cell identification signal received by the best path detection function;
A transmission source determination comprising: a secondary determination repetition step that returns to the determination application step and repeats the process when the determination or application of determination has not been completed for all determination pending observation samples of the connected call program. In the transmission source determination program according to claim 1, wherein the predetermined block is Ri block and the next larger block der the predetermined value of the predetermined signal is maximized,
The change amount calculating step individually calculates a change amount of a temporal relative value for both the blocks,
The primary determination step further includes a step of detecting that both blocks calculated individually in the change amount calculation step exhibit a change amount of a temporal relative value of opposite polarity and the same absolute amount. Transmission source judgment program. In a predetermined CDMA mobile communication system using a relay station, a computer is caused to obtain a series of observation samples obtained by performing an alignment process on a series of information acquired by a plurality of path detection functions over a plurality of time zones. The transmission source of the signal received by the predetermined path detection function for the observation sample is provisionally determined, and the transmission source of the signal received by the predetermined path detection function for the observation sample based on the series of temporary determinations is the base station. A transmission source determination program for determining whether a relay station is used,
The series of information is composed of a series of measurement information acquired in a plurality of time zones in a predetermined time unit, the series of measurement information is recorded in a measurement information recording unit, and each measurement information is maximum in the multipath. The power value of each path acquired at each measurement time by the first path detection function and the second path detection function for separately detecting the first path having power and the second path having the next largest power and the two paths Relative delay amount,
An observation sample acquisition step for obtaining each observation sample that has been aligned based on each measurement time for each measurement information recorded in the measurement information recording unit;
Based on the relative delay amount in the observation sample acquired in the observation sample acquisition step and a predetermined threshold, the transmission source of the signal received by the first path detection function in the observation sample is determined for a series of observation samples. A primary determination step to be performed;
Based on the power value of the first path in the observation sample, the power value of the first path and the power value of the second path in the observation sample immediately before the observation sample, and the predetermined power difference threshold, the first path in the observation sample The detection function obtains a replacement determination as to whether or not the transmission source of the received signal has occurred, and based on the replacement determination and the determination of the transmission source for the series of observation samples performed in the primary determination step, the observation sample Re-determining the transmission source of the signal received by the first path detection function for the observation sample, based on the comparison between the relative delay amount in the observation sample and the predetermined threshold and the re-determination, or the comparison and the observation Based on the comparison of the power values of the paths in the sample and the re-determination, the final determination of the transmission source of the signal received by the first path detection function for the observation sample is performed. Transmission source determination program characterized by comprising a secondary determination step performed on the observation sample. The transmission source determination program according to claim 3 , wherein the primary determination step is performed with respect to the observation source acquired in the observation sample acquisition step with respect to the transmission source of the cell identification signal received by the first path detection function.
When the relative delay amount of the observation sample is a predetermined threshold or more, a base station determination step for obtaining a primary determination result for determining the transmission source as a base station;
When the relative delay amount of the observation sample is equal to or less than a negative value of the predetermined threshold, a relay station determination step for obtaining a primary determination result for determining the transmission source as a relay station;
A determination hold step for determining that the transmission source is held when the relative delay amount of the observation sample is less than the predetermined threshold and greater than a negative value of the predetermined threshold;
A transmission source comprising: a primary determination repetition step that returns to the base station determination step and repeats the process when the determination has not been completed for all observation samples acquired in the observation sample acquisition step. Judgment program. The transmission source determination program according to claim 4 , wherein the secondary determination step includes:
For the observation sample acquired in the observation sample acquisition step, the difference between the power value of the first path and the power value of the first path in the observation sample immediately before the observation sample is greater than the first power difference threshold and the first When the absolute value of the difference between the power value of the path and the power value of the second path in the observation sample immediately before the observation sample is smaller than the second power difference threshold, the first path detection function is received at the time of the observation sample. A replacement determination step for determining that a replacement has occurred in the transmission source of the cell identification signal;
If the observation sample for which the determination is suspended in the determination suspension step is not determined that the replacement has occurred in the replacement determination step and the primary determination result is obtained in the observation sample immediately before the observation sample, the observation The same determination as the primary determination result is applied to the sample, and when it is determined that the replacement has occurred in the replacement determination step, the primary determination result is first applied to the observation sample after the observation sample. A re-determination step that applies the same determination as the primary determination result of the obtained observation sample;
In the re-determination step, if it is not determined that a replacement has occurred in the replacement determination step and a primary determination result has not been obtained for the observation sample immediately before the observation sample, the observation sample may be prior to the observation sample. A re-determination step that applies the same determination as the primary determination result of the closest observed sample from which the primary determination result was obtained in
When the absolute value of the relative delay amount of the observation sample acquired in the observation sample acquisition step is not greater than or equal to a predetermined threshold value, the determination applied to the observation sample in the redetermination step or the re-determination step is a final determination. A determination pending observation sample final determination step,
When the absolute value of the relative delay amount of the observation sample acquired in the observation sample acquisition step is greater than or equal to a predetermined threshold, if the power value in the first path is smaller than the power value in the second path, the primary determination step When the determination opposite to the primary determination result obtained in step 1 is applied to the observation sample as the final determination, and the power value in the first path is not smaller than the power value in the second path, the primary determination obtained in the primary determination step. A final decision step to apply the result to the observed sample as a final decision;
A secondary determination repetition step that repeats the process by returning to the replacement determination step when the final determination has not been completed for all observation samples acquired in the observation sample acquisition step. Source determination program. In a predetermined CDMA mobile communication system using a relay station, a computer is caused to execute the transmission source determination program according to any one of claims 1 and 2 in a connected call section, and in a non-connected call section, claims 3 to transmission source determination program for executing the transmission source determination program according to any of the 5. A computer-readable recording medium on which the transmission source determination program according to any one of claims 1 to 6 is recorded. In a predetermined CDMA mobile communication system using a relay station, a series of observation samples obtained by aligning a series of information acquired by a plurality of path detection functions over a plurality of time zones is obtained, and the series of observation samples is obtained. Temporarily determine the transmission source of the signal received by the predetermined path detection function, and determine whether the transmission source of the signal received by the predetermined path detection function for the observation sample is a base station or a relay station based on the series of temporary determinations A transmission source determination method for performing
A connection call indicating a time interval in a connection state from call connection to disconnection is composed of the series of information acquired in a plurality of time zones in a predetermined time unit, and each information is acquired for each of the plurality of path detection functions. Each block is composed of a block of data, and each block has a time relative position at which the data is acquired with reference to a standard time determined by a predetermined CDMA mobile communication system and a predetermined value of a predetermined signal in the data Including
An observation sample acquisition step for obtaining each observation sample in which each block is aligned based on the predetermined value for each piece of information;
Based on the temporal relative position of the predetermined block in the observation sample acquired in the observation sample acquisition step and the temporal relative position of the predetermined block in the observation sample immediately before the observation sample, the predetermined block in the observation sample A primary determination (or tentative determination) step for determining a transmission source of a signal received by a path detection function corresponding to a series of observation samples;
A secondary determination step of determining a transmission source of a signal received by the path detection function corresponding to the predetermined block in the connection call based on the determination of the transmission source for the series of observation samples performed in the primary determination step. ,
The predetermined block is a block in which a predetermined value of the predetermined signal is maximum,
The predetermined signal is a cell identification signal, the predetermined value is a signal-to-interference noise energy ratio, and the observation sample acquisition step includes:
For each information, an organizing step for creating organizing information composed of organizing blocks obtained by extracting a temporal relative value, a cell identification signal and a signal-to-interference noise energy ratio from each block;
For each organizing information created in the organizing step, an aligning step for obtaining observation samples in which organizing blocks are arranged in descending order of signal to interference noise energy ratio;
For each observation sample obtained in the alignment step, if the signal-to-interference noise energy ratio of the best block, which is the organizing block with the largest signal-to-interference noise energy ratio, is equal to or lower than a predetermined lower limit value, the observation sample is connected When it is deleted from the call and the signal-to-interference noise energy ratio of the best block exceeds a predetermined lower limit value, the temporal relative value of the observed sample in the best block and the time in the best block of the observed sample immediately before the observed sample A change amount calculating step for obtaining a change amount between the relative value and the relative value,
In the primary determination step, the cell identification signal transmission source received by the best path detection function, which is the path detection function corresponding to the best block of the observation sample, for the observation sample of the connection call,
When the amount of change obtained in the change amount calculating step is equal to or greater than a predetermined threshold, a relay station determination step for obtaining a primary determination result for determining the transmission source as a relay station;
A base station determination step for obtaining a primary determination result for determining that the transmission source is a base station, when the change amount obtained in the change amount calculation step is equal to or less than a negative value of the predetermined threshold;
When the amount of change obtained in the change amount calculating step is less than the predetermined threshold and greater than a negative value of the predetermined threshold, a determination hold step for determining that the transmission source is hold;
If the determination has not been completed for all the observation samples of the connection call, the primary determination repetition step of repeating the process by returning to the relay station determination step,
In the secondary determination step, for the determination pending observation sample that is the observation sample determined to hold the transmission source in the determination suspension step,
When there is an observation sample in which a primary determination result obtained in the primary determination step is obtained in a connection call, the determination pending observation sample before the first observation sample in which the primary determination result is obtained in the connection call Apply the opposite judgment to the primary judgment result of the first observation sample, and the primary judgment result of the nearest previous observation sample that obtained the primary judgment result for the judgment pending observation sample after the first observation sample A determination applying step for applying the same determination as
When there is no observation sample from which the primary determination result by the primary determination step is obtained in the connection call and the point where the information is acquired is within a predetermined distance from the base station, for all determination pending observation samples in the connection call A base station secondary determination step of determining the transmission source of the cell identification signal received by the best path detection function as a base station;
If there is no observation sample from which the primary determination result obtained by the primary determination step is obtained in the connected call and the point where the information is acquired is not within the predetermined distance from the base station, each of the unconnected calls immediately before the connected call The same processing as the observation sample acquisition step is performed on the information, and for each observation sample of the unconnected call, for the transmission source of the cell identification signal received by the best path detection function of the observation sample,
When the time difference between the observation sample and the observation sample immediately before the observation sample is a predetermined time or more or when the amount of change obtained in the amount of change calculation step exceeds a predetermined other threshold, it is not possible to determine,
When the time difference between the observation sample and the observation sample immediately before the observation sample is less than a predetermined time, and when the change amount obtained in the change amount calculation step is equal to or less than the predetermined other threshold value, the change amount When the amount of change obtained in the calculation step is greater than or equal to the predetermined threshold, the transmission source is determined as a relay station, and when the amount of change is less than or equal to the negative value of the predetermined threshold, the transmission source is A non-connection call determination step in which it is determined that the station is a station and the determination is impossible when the amount of change is less than the predetermined threshold and greater than a negative value of the predetermined threshold;
If determination is not impossible in the non-connection call determination step, the non-connection call determination step serves as a transmission source of the cell identification signal received by the best path detection function for all determination pending observation samples in the connection call. An unconnected call determination application step for applying the determination;
If it is determined that the determination is not possible in the unconnected call determination step, the connection before the unconnected call is used as a transmission source of the cell identification signal received by the best path detection function for all determination pending observation samples in the connected call. A proximity observation sample determination applying step that applies a determination on the closest observation sample that is a call and the determination of the transmission source of the cell identification signal received by the best path detection function;
A transmission source determination comprising : a secondary determination repetition step that returns to the determination application step and repeats the process when the determination or application of determination has not been completed for all determination pending observation samples of the connected call Way . In the transmission source determination method of claim 8, wherein the predetermined block is Ri block and the next larger block der the predetermined value of the predetermined signal is maximized,
The change amount calculating step individually calculates a change amount of a temporal relative value for both the blocks,
The primary determination step further includes a step of detecting that both blocks calculated individually in the change amount calculation step exhibit a change amount of a temporal relative value of opposite polarity and the same absolute amount. Transmission source determination method. In a predetermined CDMA mobile communication system using a relay station, a series of observation samples obtained by aligning a series of information acquired by a plurality of path detection functions over a plurality of time zones is obtained, and the series of observation samples is obtained. Temporarily determine the transmission source of the signal received by the predetermined path detection function, and determine whether the transmission source of the signal received by the predetermined path detection function for the observation sample is a base station or a relay station based on the series of temporary determinations Is what
The series of information is composed of a series of measurement information acquired in a plurality of time zones in a predetermined time unit, the series of measurement information is recorded in a measurement information recording unit, and each measurement information is maximum in the multipath. The power value of each path acquired at each measurement time by the first path detection function and the second path detection function for separately detecting the first path having power and the second path having the next largest power and the two paths Relative delay amount,
An observation sample acquisition step for obtaining each observation sample that is aligned based on each measurement time for each measurement information;
Based on the relative delay amount in the observation sample acquired in the observation sample acquisition step and a predetermined threshold, the transmission source of the signal received by the first path detection function in the observation sample is determined for a series of observation samples. A primary determination step to be performed;
Based on the power value of the first path in the observation sample, the power value of the first path and the power value of the second path in the observation sample immediately before the observation sample, and the predetermined power difference threshold, the first path in the observation sample The detection function obtains a replacement determination as to whether or not the transmission source of the received signal has occurred, and based on the replacement determination and the determination of the transmission source for the series of observation samples performed in the primary determination step, the observation sample Re-determining the transmission source of the signal received by the first path detection function with respect to, based on the comparison between the relative delay amount in the observation sample and the predetermined delay amount threshold and the re-determination, or the comparison Based on the comparison of the power value of each path in the observation sample and the re-determination, the final determination of the transmission source of the signal received by the first path detection function for the observation sample is performed. Transmission source determination method characterized by comprising a secondary determination step of for a series of observations sample. The transmission source determination method according to claim 10 , wherein in the primary determination step, the transmission source of the cell identification signal received by the first path detection function for the observation sample acquired in the observation sample acquisition step,
When the relative delay amount of the observation sample is a predetermined threshold or more, a base station determination step for obtaining a primary determination result for determining the transmission source as a base station;
When the relative delay amount of the observation sample is equal to or less than a negative value of the predetermined threshold, a relay station determination step for obtaining a primary determination result for determining the transmission source as a relay station;
A determination hold step for determining that the transmission source is held when the relative delay amount of the observation sample is less than the predetermined threshold and greater than a negative value of the predetermined threshold;
A transmission source comprising: a primary determination repetition step that returns to the base station determination step and repeats the process when the determination has not been completed for all observation samples acquired in the observation sample acquisition step. Judgment method. The transmission source determination method according to claim 11 , wherein the secondary determination step includes:
For the observation sample acquired in the observation sample acquisition step, the difference between the power value of the first path and the power value of the first path in the observation sample immediately before the observation sample is greater than the first power difference threshold and the first When the absolute value of the difference between the power value of the path and the power value of the second path in the observation sample immediately before the observation sample is smaller than the second power difference threshold, the first path detection function is received at the time of the observation sample. A replacement determination step for determining that a replacement has occurred in the transmission source of the cell identification signal;
If the observation sample for which the determination is suspended in the determination suspension step is not determined that the replacement has occurred in the replacement determination step and the primary determination result is obtained in the observation sample immediately before the observation sample, the observation The same determination as the primary determination result is applied to the sample, and when it is determined that the replacement has occurred in the replacement determination step, the primary determination result is first applied to the observation sample after the observation sample. A re-determination step that applies the same determination as the primary determination result of the obtained observation sample;
In the re-determination step, if it is not determined that a replacement has occurred in the replacement determination step and a primary determination result has not been obtained for the observation sample immediately before the observation sample, the observation sample may be prior to the observation sample. A re-determination step that applies the same determination as the primary determination result of the closest observed sample from which the primary determination result was obtained in
When the absolute value of the relative delay amount of the observation sample acquired in the observation sample acquisition step is not greater than or equal to a predetermined threshold value, the determination applied to the observation sample in the redetermination step or the re-determination step is a final determination. A determination pending observation sample final determination step,
When the absolute value of the relative delay amount of the observation sample acquired in the observation sample acquisition step is greater than or equal to a predetermined threshold, if the power value in the first path is smaller than the power value in the second path, the primary determination step When the determination opposite to the primary determination result obtained in step 1 is applied to the observation sample as the final determination, and the power value in the first path is not smaller than the power value in the second path, the primary determination obtained in the primary determination step. A final decision step to apply the result to the observed sample as a final decision;
A secondary determination repetition step that repeats the process by returning to the replacement determination step when the final determination has not been completed for all observation samples acquired in the observation sample acquisition step. Source judgment method. In a predetermined CDMA mobile communication system using a relay station, the transmission source determination method according to claim 8 or 9 is used in a connected call section, and the transmission according to any one of claims 10 to 12 is performed in a non-connected call section. A transmission source determination method using a source determination method.