JP5020658B2 - Wireless communication control method and wireless communication apparatus - Google Patents

Description

  The present invention relates to a wireless communication control method and a wireless communication apparatus that implements the wireless communication control method.

  In recent years, there are a plurality of systems corresponding to respective standards in wireless communication devices such as mobile phones.

  Normally, a wireless communication apparatus is configured to support any one of the standards, but for example, recent mobile phone terminals provide high-function services so that a plurality of communication systems can be used. Many are multi-banded. As an example, there is a mobile phone terminal that can use two communication systems, for example, a cdma2000 1x system (hereinafter abbreviated as 1x as appropriate) and a cdma2000 1xEV-DO system (hereinafter abbreviated as EVDO as appropriate). (For example, refer to Patent Document 1).

  The mobile phone terminal conforming to cdma2000 is configured to transmit a base station or a sector of a system on which the terminal is waiting as a connection destination when transmitting from the terminal.

  In the conventional mobile phone terminal of this type, for example, when transmitting a packet, as shown in the flowchart of FIG. 13, first, the standby state of the system in the own terminal is determined (step S301). As a result, when both the 1x base station and the EVDO base station are waiting, a packet is transmitted to the waiting EVDO base station (step S302), and only the 1x base station is waited. If it is, the packet is transmitted to the 1x base station (step S303). If only the EVDO base station is awaited, the packet is transmitted to the EVDO base station (step S304). . Thereafter, it is determined whether or not the transmission is successful (step S305). If the transmission is successful, the transmission operation is terminated.

  On the other hand, if it is determined in step S301 that no base station is waiting, or if it is determined in step S305 that the transmission is unsuccessful (failed), that is, the destination base station is congested and restricted. When the connection is refused due to the situation, the connection status, etc., an out-of-service scan is attempted (step S306), and it is determined whether the scan is successful, that is, whether a communicable base station is detected ( In step S307), if successful, the process proceeds to step S301, and if unsuccessful (failed), the outgoing operation is terminated.

  Also, when transmitting a voice, as shown in the flowchart of FIG. 14, first, the standby state of the terminal is determined (step S321), and both the 1x base station and the EVDO base station are awaited. In this case, voice is transmitted to the waiting 1x base station (step S322), and when only 1x base station is waiting, the voice is transmitted to the 1x base station (step S322). S323). Thereafter, it is determined whether or not the transmission is successful (step S324). If the transmission is successful, the transmission operation is terminated.

  On the other hand, when only the EVDO base station is awaited at step S321, when it is determined that it is out of range, or when it is determined that transmission is unsuccessful (failed) at step S324, that is, the destination base When the connection is refused by the station due to congestion, regulation status, connection status, etc., as in the case of packet transmission, out-of-service scanning is attempted (step S325), and it is determined whether the scanning is successful ( In step S326), if successful, the process proceeds to step S321. If unsuccessful (unsuccessful), the transmission operation is terminated.

  In FIG. 13 and FIG. 14, when the transmission is unsuccessful (failed), a base station that can be transmitted is searched by out-of-service scanning, and when it is found, the base station is changed and the transmission operation is performed again. However, other methods include the same system, the same channel, the same channel, the method of transmitting to a base station with high radio field strength, and the same system from the PRL (Priority Roaming List: roaming area information) registered in the terminal Another method is to scan different channels and different systems, change the base station that can be awaited, and transmit. In the case of the former method, there is a high possibility that it will be the same as the base station that failed to make a call.

On the other hand, the following methods are known as methods for changing the base station at the initiative of the terminal side.
(1) Hash calculation is performed in the standby system, and the base station is changed to another base station registered in the Neighbor List (neighboring base station list) transmitted from the base station based on the calculation result. Method (in this case, since there is no limitation on the same system and the same channel, it is possible to change to a base station registered in the Neighbor List).
(2) A method of changing to a base station with high radio field strength (Idle Handoff) in the same system.
(3) A method of changing to a base station with high radio field intensity after traffic is established after transmission (Active Handoff).
(4) A method of scanning a system having a higher priority than the system that is currently waiting from a system registered in the PRL at regular intervals, and changing the base station if successful (Reselection).

In addition, the following methods are known as methods for changing a base station on the initiative of the base station side.
(1) A method of changing from a base station to a designated base station (Redirection).
(2) After transmission, after the traffic is established, the base station takes the initiative to change to another base station (Active Handoff).

JP 2006-186686 A

  However, in the conventional mobile phone terminal described above, at the time of outgoing call, prediction or determination of whether or not outgoing call is rejected without taking into account any restriction status or connection status of the base station that is waiting. The transmission is made to the base station without performing it. Similarly, even when another base station is found and transmitted after failure in transmission, the transmission is performed without considering any restriction status or connection status of the base station. If you are waiting at a base station that is 100% restricted, make sure that you are aware of the restriction at the time of outgoing call and do not connect, and then remove the waiting system from the scan target. Thus, the base station of another system is scanned to change the standby base station.

  For this reason, it may take time until the transmission is successful, or it may be inconvenient for the user, such as when the waiting system is 100% regulated, it is impossible to make a transmission on the same system. There is a concern that the connection rate will be lowered.

  Such a problem occurs similarly in the case where the base station has a plurality of sectors. Therefore, in this specification, the simple description of “base station” includes “sector”.

  The present invention has been made in view of the above-described circumstances, and an object of the present invention is to provide a radio communication control method capable of transmitting to an optimal base station or sector, improving the connection rate, and improving user convenience. And providing a wireless communication device.

The invention of the wireless communication control method according to claim 1 that achieves the above object is as follows:
A search step in which the wireless communication device acquires broadcast information from a neighboring base station or sector when transmitting,
When moving from the standby base station or sector to another base station or sector based on the broadcast information acquired from the neighboring base station or sector and the broadcast information acquired from the standby base station or sector, A selection step of selecting a base station or sector of the same system as the waiting base station;
And transmitting to the selected optimum base station or sector.

The invention according to claim 2 is the wireless communication control method according to claim 1,
The selection step includes
Based on the restriction information included in the broadcast information of each acquired base station or sector, a base station or sector of the same system as the standby base station is selected.

The invention according to claim 3 is the wireless communication control method according to claim 1 or 2,
The selection step includes
Based on the obtained broadcast information of each base station or sector, an average uplink transmission rate is calculated, and based on the calculated average uplink transmission rate of each base station or sector, the same as the standby base station A system base station or sector is selected.

Further, the invention of a wireless communication device according to claim 4 that achieves the above object is as follows:
Search means for obtaining broadcast information from neighboring base stations or sectors at the time of transmission;
Based on the broadcast information acquired by the search means and the broadcast information acquired from the standby base station or sector, when the standby base station or sector moves to another base station or sector, the standby Selecting means for selecting a base station or sector of the same system as the base station of
Transmitting means for transmitting to the optimum base station or sector selected by the selecting means;
It is characterized by having.

  According to the present invention, when making a call, search for neighboring base stations or sectors to obtain broadcast information, and obtain the broadcast information from the obtained neighboring base stations or sectors and the standby base station or sector. Based on the broadcast information, since the optimum base station or sector of the destination is selected and transmitted, it can be transmitted to the optimum base station or sector, the connection rate can be improved, and the user's Convenience can be improved.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a functional block diagram showing a configuration of a wireless communication apparatus according to an embodiment of the present invention. The wireless communication apparatus is a mobile phone terminal that performs communication conforming to, for example, cdma2000, and includes a control unit 1 that controls the overall operation. The control unit 1 includes a display unit 2 and a key operation unit 3. In addition to being connected, the EVDO protocol control unit 4 and the 1x protocol control unit 5 are connected.

  An EVDO transmission control unit 6 and an EVDO reception control unit 7 are connected to the EVDO protocol control unit 4, and a 1x transmission control unit 8 and a 1x reception control unit 9 are connected to the 1x protocol control unit 5.

  The EVDO transmission control unit 6 and the 1x transmission unit 8 are connected to the primary antenna 11 through the transmitter 10, and the EVDO reception control unit 7 and the 1x reception control unit 9 are connected to the reception antenna control unit 12, and this reception antenna The control unit 12 is connected to the primary antenna 11 through the primary receiver 13 and is connected to the secondary antenna 15 through the secondary receiver 14.

  In the packet communication by the EVDO system, this mobile phone terminal drives the transmitter 10 via the EVDO transmission control unit 6 by the EVDO protocol control unit 4 and also via the EVDO reception control unit 7 and the reception antenna control unit 12. The primary receiver 13 and the secondary receiver 14 are driven to transmit a packet from the transmitter 10 via the primary antenna 11 in transmission, and in reception, the diversity scheme is adopted and the primary antenna 11 is passed through. While the primary receiver 13 receives the packet, the secondary receiver 14 is controlled to receive the packet via the secondary antenna 15.

  In the packet communication by the EVDO system, the 1x protocol control unit 5 drives the 1x reception control unit 9, and the primary receiver 13 or the secondary receiver 14 periodically notifies the incoming call from the base station in the 1x system. Control is performed so as to monitor incoming voice information by receiving broadcast information (paging).

  On the other hand, in voice communication using 1x, the 1x protocol control unit 5 drives the transmitter 10 via the 1x transmission control unit 8 and the primary receiver 13 via the 1x reception control unit 9 and the reception antenna control unit 12. In transmission, audio information is transmitted from the transmitter 10 via the primary antenna 11 in transmission, and in reception, audio information is controlled to be received by the primary receiver 13 via the primary antenna 11. .

  In the present embodiment, the management memory 16 and the selection unit 17 are provided in the control unit 1 to search for neighboring base stations to obtain broadcast information, and the obtained broadcast information from the neighboring base stations and the standby base station The management memory 16 manages the restriction status and the connection status based on the notification information acquired from the information, and the selection unit 17 selects the optimum base station of the transmission destination at the time of outgoing call based on the management result and makes the outgoing call. . Therefore, in the present embodiment, the search means is configured by several combinations of the control unit 1, the EVDO reception control unit 7, the 1x reception control unit 9, the primary antenna 11, the primary receiver 13, and the management memory 16 The control unit 1 including the selection unit 17 constitutes a selection unit, and the transmission unit includes several combinations of the control unit 1, the EVDO transmission control unit 6, the 1x transmission control unit 8, the primary antenna 11, the transmitter 10, and the like. Is configured.

  Note that various information obtained from broadcast information transmitted by the base station of the 1x system is related to 3GPP2C. S. 0002 and 3GPP2C. S. The various information obtained from the broadcast information transmitted by the base station of the EVDO system is described in 3GPP2C. S. Detailed description will be omitted here.

  FIG. 2 is a flowchart showing a schematic operation of packet transmission by the wireless communication apparatus of the present embodiment. In the packet transmission operation, when a packet transmission request is received (step S21), first, broadcast information from a neighboring base station is acquired by a neighbor scan (step S22), and further, the base of the system registered in the PRL by a PRL scan. Broadcast information from the station is acquired (step S23). After that, based on the broadcast information acquired by the Neighbor scan and the PRL scan and the broadcast information acquired from the currently waiting base station, the base station with the best regulation status and connection status is selected (step S24), Packet transmission is executed to the selected base station (step S25).

  FIG. 3 is a flowchart showing a specific operation of packet transmission according to this embodiment. In the present embodiment, first, a standby state of the system in the own terminal is determined (step S41). Here, if it is within the range waiting for the base station of any system, next, whether or not the transmission is a transmission by retry operation, that is, out-of-service scan after the transmission is unsuccessful (failed) once It is determined whether or not it is the second and subsequent transmissions (step S42).

  If it is determined in step S42 that the call is the first call that is not a retry operation, the restriction connection status determination process is executed (step S43) to search for a base station that can stand by in a system other than the currently waiting system. The base station having the best regulation status and connection status is selected from the found base stations that can be standby and the currently standby base stations. This restricted connection status determination process will be described later.

  As a result, when the EVDO base station is selected as the best base station, a packet is transmitted to the EVDO base station (step S44), and the 1x base station is selected as the best base station. If so, a packet is transmitted to the 1x base station (step S45). Thereafter, it is determined whether or not the transmission is successful (step S46). If the transmission is successful, the transmission operation is terminated.

  On the other hand, if it is determined in step S41 that the base station of any system is out of the service area, or if a base station that can make a call is not found in step S43, or if the call is unsuccessful (failure) in step S46. ) Is determined (step S47), it is determined whether the scan is successful, that is, whether a communicable base station is detected (step S48). The process proceeds to step S41, and in the case of unsuccess (failure), the transmission operation is terminated.

  In step S42, if the outgoing call operation is a retry operation, the standby status of the system found in the out-of-service scan in step S47 is determined without executing the restriction connection status determination process again (step S49). . As a result, when both the 1x base station and the EVDO base station are awaited, or when only the EVDO base station is awaited, a packet is transmitted to the EVDO base station in step S44. If only the base station is waiting, a packet is transmitted to the 1x base station in step S45.

  That is, in the present embodiment, prior to the first transmission in response to the packet transmission request, the restricted connection status is determined in step S43, and the base station with the best restricted status and connection status is selected and selected. For the second and subsequent transmissions that failed to be transmitted for the first time, the transmission operation is executed in the same manner as in FIG. 13 without determining the restricted connection status.

  Next, the above-described regulated connection status determination process will be described with reference to the flowchart shown in FIG.

  First, the outgoing call type of emergency call (1x), voice, packet, and 1x packet is determined (step S61). Here, when the call type is determined to be an emergency call, the call is transmitted to the waiting 1x base station without executing the restriction connection status determination process.

  When the call type is determined to be voice or 1x packet, the current standby type is determined (step S62). As a result, when waiting for both the 1x and EVDO systems, or when waiting for only the 1x system, the current status acquisition of the 1x system (step S63), the 1x system Neighbor scan (step S64), and the 1x system The PRL scan process (step S65) is executed, and information on each base station obtained by each process is stored in the management memory 16 shown in FIG.

  Thereafter, based on the stored 1x restricted connection status list 66, the selection unit 17 shown in FIG. 1 determines (selects) the base station with the best restricted status and connection status in the 1x system as the originating base station. (Step S67). The determination result is determined in step S68, and if a source base station is found, the process proceeds to step S45 in FIG. 3 to execute 1x packet transmission processing, and if the source base station is not found. In step S47 of FIG. 3, assuming that there is no callable system, the out-of-service scan is executed. If it is determined in step S62 that the 1x system is not awaited, the process ends, and the process proceeds to step S47 in FIG. 3 to execute out-of-service scanning.

  Details of each process of the 1x current state acquisition (step S63), the 1x neighbor scan (step S64), and the 1xPRL scan (step S65) described above will be described later.

  On the other hand, if it is determined in step S61 that the transmission type is a packet, the current standby type is similarly determined (step S69). As a result, when waiting for both the 1x and EVDO systems, or when waiting for only the EVDO system, the current status of the EVDO system is acquired (step S70), the neighbor scan of the EVDO system (step S71), and the EVDO system. The PRL scan process (step S72) is executed, and information on each base station obtained by each process is stored in the management memory 16 shown in FIG.

  After that, based on the stored EVDO restriction connection status list 73, the selection unit 17 shown in FIG. 1 determines (selects) the base station with the best restriction status and connection status in the EVDO system as the transmission base station. (Step S74). The determination result is determined in step S75, and if the originating base station is found, the process proceeds to step S44 in FIG. 3 to execute the EVDO packet originating process, and the originating base station is not found. Further, it determines whether or not there is a standby for the 1x system (step S76), and if there is no standby for the 1x system, the system moves to step S47 in FIG.

  If it is determined in step S69 that the 1x system is waiting, or if it is determined in step S76 that the 1x system is waiting, the process proceeds to step S63. Therefore, in this case, the packet can be transmitted from the 1x system.

  Details of the above-described processes of EVDO current status acquisition (step S70), EVDO Neighbor scan (step S71), and EVDO PRL scan (step S72) will be described later.

  Next, each process shown in FIG. 4 will be described with reference to the flowcharts shown in FIGS.

(1x current status acquisition)
FIG. 5 is a flowchart showing the process of obtaining the 1x current status. In the 1x current status acquisition process, the radio field intensity (step S81), the connection regulation value (step S82), and the transmission type regulation (step S83) are obtained based on the notification information from the standby base station of the current 1x system, A 1x restricted connection status list 66 of the base station is generated.

  Here, the radio wave intensity is obtained from the received electric field intensity of the broadcast information, and the connection restriction value and the transmission type restriction are based on restriction information included in the “access parameters message” (access parameter message) of the broadcast information from the base station. get.

(1x Neighbor scan)
FIG. 6 is a flowchart showing a 1 × Neighbor scan process. In the 1x Neighbor scan, the 1x scan is executed for each base station registered in the Neighbor List (neighboring base station list) included in the “sector parameters message” of the broadcast information from the base station. (Step S101), the result is determined in Step S102, and if the scan is successful, that is, if the base station of the 1x system is found, the 1x current state similar to FIG. 5 is based on the broadcast information from the base station. Acquisition is executed (step S103), and a 1x restricted connection status list 66 in the base station is generated. These processes are executed for all base stations registered in the Neighbor List, except for the currently waiting 1x base station.

(1x PRL scan)
FIG. 7 is a flowchart showing a 1 × PRL scan process. In the 1xPRL scan, the 1x scan is executed for each Acquisition Record (band class, channel) of the PRL registered in the terminal (step S121), and the result is determined in step S122. That is, if a base station of the 1x system is found, 1x current status acquisition similar to that of FIG. 5 is executed based on the broadcast information from the base station (step S123), and the 1x regulated connection status list 66 in the base station is obtained. create. These processes are executed for all Acquisition Records.

(1x transmission base station determination)
FIG. 8 is a flowchart showing a process of 1x transmission base station determination. In the 1x transmission base station determination process, first, internal data (1x restricted connection status list) acquired by acquiring the 1x current state in FIG. 5 is initialized as the optimal transmission base station data 140 for the standby base station of the current 1x system. (Step S141).

  Next, for each 1x restricted connection status list 66 acquired in the 1x Neighbor scan and 1x PRL scan, the presence / absence of outgoing call restriction is determined from the outgoing call type restriction information (step S142). It is determined from the information whether or not there is a 100% transmission restriction (step S143). Are weighted (step S145). Here, examples of the application include voice, browser, mail transmission, mail reception, IP phone, and TV phone.

  Thereafter, the weighted 1x restricted connection status list 66 data is compared with the optimum outgoing base station data 140, which is internal data, to determine whether the transmission restriction is better than the internal data (step S146). If it is good, it is further determined whether the radio wave intensity is better than the internal data (step S147).

  As a result, when the radio field intensity is better than the internal data, the transmission restriction value is written in the 1x restricted connection status list 66 to the optimum outgoing base station data 140 (step S148), and the connection restriction value is written (step S148). S149), the radio wave intensity, band class, channel, and PN are written (step S150), and the optimum transmission base station data 140, that is, internal data is updated.

  It should be noted that there is a transmission restriction in step S142, a 100% transmission restriction in step S143, a transmission restriction that is worse than internal data in step S146, or a radio wave intensity that is worse than internal data in step S147. Ends the processing for the 1x restricted connection status list 66 at that time.

  When the above processing is executed for all 1x restricted connection status lists 66 acquired in the 1x Neighbor scan and the 1x PRL scan, it is determined whether there is an optimum outgoing base station by referring to the optimum outgoing base station data 140. (Step S151), and the 1x transmission base station determination process is terminated.

  Therefore, if there is a 1x base station that is more optimal than the currently waiting 1x base station, the optimum outgoing base station data 140 includes the restriction status of the 1x base station and the band class channel for transmission to the 1x base station. If there is a PN and there is no 1x base station that is more optimal than the currently waiting 1x base station, the data of the currently waiting 1x base station becomes the optimum outgoing base station data. As a result, the 1x base station optimal for transmission is selected.

(EVDO status acquisition)
FIG. 9 is a flowchart showing the EVDO current status acquisition process. In the EVDO current status acquisition process, first, the uplink upper limit transmission rate (transmission rate upper limit value) defined by “Reverse Rate Limit” included in the broadcast information from the standby base station of the current EVDO system is used as the transmission rate upper limit total data. Internal data is initialized as an initial value for calculating 160 (step S161).

  Next, the radio wave intensity (step S162) and the connection regulation value (step S163) are acquired based on the broadcast information of the standby base station of the current EVDO system, and the information is stored in the EVDO regulation connection status list 73. To do.

  Thereafter, for each of the number of channels (number of channels) connectable to the standby base station acquired from the broadcast information, the transmission speed upper limit value is acquired from the broadcast information and added to the transmission speed upper limit total data 160 (step) In S165, the received communication band effective value (FT Valid) is acquired from “Quick Config” included in the broadcast information, and added to the received communication band effective value total data 166 (step S167).

  When the above transmission rate upper limit addition processing and reception communication bandwidth valid value addition processing are completed for all connectable numbers, the transmission rate upper limit total data 160 is divided by the connectable number (RPC Count). Then, the average uplink transmission rate that is the average value of the transmission rate upper limit values is calculated (step S168), the calculated average uplink transmission rate is stored in the EVDO restricted connection status list 73, and the received communication band effective value total data 166 is divided by the connectable number to calculate the average value of the received communication band, that is, the downlink connection status of the base station (step S169), and the calculated downlink connection status is displayed in the EVDO restricted connection status list 73. The EVDO restriction connection status list 73 is stored in the base station.

(EVDO Neighbor scan)
FIG. 10 is a flowchart showing EVDO Neighbor scan processing. In the EVDO Neighbor scan, the EVDO scan is executed for each base station registered in the Neighbor List included in the broadcast information from the base station (step S181), and the result is determined in step S182. If successful, based on the broadcast information from the base station, EVDO current status acquisition similar to FIG. 9 is executed (step S183), and the EVDO restricted connection status list 73 in the base station is created. These processes are executed for all base stations registered in the Neighbor List except for the EVDO base station that is currently waiting.

(EVDO PRL scan)
FIG. 11 is a flowchart showing EVDO PRL scan processing. In the EVDO PRL scan, the EVDO scan is executed for each Acquisition Record of the PRL registered in the own terminal (step S201), the result is determined in step S202, and if the scan is successful, the base station Based on the notification information, EVDO current status acquisition similar to that in FIG. 9 is executed (step S203), and the EVDO restricted connection status list 73 in the base station is created. These processes are executed for all Acquisition Records.

(EVDO transmission base station determination)
FIG. 12 is a flowchart showing EVDO transmission base station determination processing. In the EVDO transmission base station determination process, first, internal data acquired by acquiring the EVDO current status in FIG. 9 is initialized as optimum transmission base station data 220 for the standby base station of the current EVDO system (step S221).

  Next, for each EVDO restriction connection status list 73 acquired in the EVDO Neighbor scan and the EVDO PRL scan, it is determined whether there is a transmission 100% restriction from the transmission type restriction information (step S222). If not, each piece of information in the EVDO restricted connection status list 73 is weighted with data 223 set in advance for each application as in the case of the 1x transmission base station determination shown in FIG. 8 (step S224).

  Thereafter, the weighted EVDO restriction connection status list 73 data is compared with the optimum transmission base station data 220 as internal data to determine whether or not the transmission restriction is better than the internal data (step S225). If it is good, it is next determined whether or not the reception speed band effective value (number of downlinks used) is better than the internal data (step S226). If it is good, the transmission speed upper limit value (uplink average transmission) is further determined. It is determined whether or not (speed) is better than the internal data (step S227).

  As a result, when the transmission rate upper limit value is better than the internal data, the connection restriction value is written in the EVDO restriction connection status list 73 to the optimum transmission base station data 220 (step S228), and the received communication band effective value. Is written (step S229), the transmission speed upper limit value is written (step S230), and the radio wave intensity, band class, channel, and PN are written (step S231) to update the optimum transmission base station data 220, that is, internal data.

  It should be noted that there is a transmission 100% restriction in step S222, a transmission restriction is worse than internal data in step S225, a reception speed band effective value is worse than internal data in step S226, and a transmission speed upper limit is set in step S227. If it is worse than the internal data, the processing for the EVDO restricted connection status list 73 is terminated at that time.

  When the above processing is executed for all EVDO restriction connection status lists 73 acquired in the EVDO Neighbor scan and EVDO PRL scan, it is determined whether there is an optimal transmission base station by referring to the optimal transmission base station data 220. (Step S232), and the EVDO transmission base station determination process is terminated.

  Therefore, if there is an EVDO base station that is more optimal than the EVDO base station that is currently waiting, the optimal transmission base station data 220 is the band class channel when transmitting to the EVDO base station and the regulation status of the EVDO base station. If there is no EVDO base station that is more optimal than the currently waiting EVDO base station, the data of the currently waiting EVDO base station becomes the optimum outgoing base station data. As a result, the EVDO base station that is optimal for transmission is selected.

  The case of transmitting a packet has been described above as an example, but the same applies to the case of voice transmission. In this case, in FIG. 4, 1x current state acquisition (step S63), 1x Neighbor scan (step S64), and 1x PRL In the scan (step S65), a 1x restricted connection status list 66 of all the base stations that can be awaited including the current standby base station is generated. Based on the 1x restricted connection status list 66, the voice is sent in step S67. The 1 × transmission base station that is optimal for transmission is selected.

  According to the present embodiment, by performing a Neighbor scan and a PRL scan at the time of outgoing call, search for neighboring base stations to obtain standby information of standby base stations, and obtain from the acquired standby base stations Based on the broadcast information and the broadcast information acquired from the currently waiting base station, the restriction status and the connection status are managed, and the selection unit 17 selects the optimum base station of the transmission destination from the management result. Thus, the connection rate can be improved and the convenience of the user can be improved.

  In addition, this invention is not limited only to the said embodiment, Many deformation | transformation or a change is possible. For example, in the above-described embodiment, both the Neighbor scan and the PRL scan are performed, but only one of them is executed, and the broadcast information obtained from the neighboring base stations that can be obtained as a result, and the current standby It can also be configured to select and transmit the optimum base station of the transmission destination based on the broadcast information acquired from the inside base station. In the above embodiment, the two systems of cdma2000 1x and EVDO are provided. However, the present invention can be effectively applied even when only one of the systems is provided. Furthermore, the present invention can be applied not only to communication conforming to cdma2000 but also to other types of wireless communication.

It is a functional block diagram which shows the structure of the radio | wireless communication apparatus which concerns on one embodiment of this invention. 3 is a flowchart showing a schematic operation of packet transmission by the wireless communication apparatus shown in FIG. 1. 4 is a flowchart showing a specific operation of packet transmission by the wireless communication apparatus shown in FIG. 1. It is a flowchart which shows the process of the restriction | limiting connection status determination of FIG. It is a flowchart which shows the process of 1x present condition acquisition of FIG. FIG. 5 is a flowchart showing processing of 1 × Neighbor scan in FIG. 4. FIG. FIG. 5 is a flowchart showing a 1 × PRL scan process of FIG. 4. FIG. It is a flowchart which shows the process of 1x transmission base station determination of FIG. It is a flowchart which shows the process of EVDO present condition acquisition of FIG. FIG. 5 is a flowchart showing a process of EVDO Neighbor scan in FIG. 4. FIG. 6 is a flowchart showing processing of the EVDO PRL scan of FIG. It is a flowchart which shows the process of EVDO transmission base station determination of FIG. It is a flowchart which shows the conventional packet transmission operation | movement. It is a flowchart which shows the conventional voice transmission operation | movement.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Control part 2 Display part 3 Key operation part 4 EVDO protocol control part 5 1x protocol control part 6 EVDO transmission control part 7 EVDO reception control part 8 1x transmission control part 9 1x reception control part 10 Transmitter 11 Primary antenna 12 Reception antenna control Unit 13 Primary receiver 14 Secondary receiver 15 Secondary antenna 16 Management memory 17 Selection unit

Claims (4)

A search step in which the wireless communication device acquires broadcast information from a neighboring base station or sector when transmitting,
When moving from the standby base station or sector to another base station or sector based on the broadcast information acquired from the neighboring base station or sector and the broadcast information acquired from the standby base station or sector, A selection step of selecting a base station or sector of the same system as the waiting base station;
And transmitting to the selected optimum base station or sector. The selection step includes
The radio according to claim 1, wherein a base station or a sector of the same system as the standby base station is selected based on restriction information included in the broadcast information of each acquired base station or sector. Communication control method. The selection step includes
Based on the obtained broadcast information of each base station or sector, an average uplink transmission rate is calculated, and based on the calculated average uplink transmission rate of each base station or sector, the same as the standby base station The radio communication control method according to claim 1 or 2, wherein a base station or a sector of the system is selected. Search means for obtaining broadcast information from neighboring base stations or sectors at the time of transmission;
Based on the broadcast information acquired by the search means and the broadcast information acquired from the standby base station or sector, when the standby base station or sector moves to another base station or sector, the standby Selecting means for selecting a base station or sector of the same system as the base station of
Transmitting means for transmitting to the optimum base station or sector selected by the selecting means;
A wireless communication apparatus comprising:

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