JP3270990B2 - Base station fault detection method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for detecting a failure in a base station connected to an ISDN network for relaying to a portable telephone using radio waves.

[0002]

2. Description of the Related Art Currently used mobile telephones can communicate with an ISDN network by relaying a nearest base station using radio. Therefore, if a failure occurs in the base station, the mobile phone cannot be used in the service area. Therefore, the base station is provided with hardware failure detection means such as detection of antenna breakage, monitoring of transmission power, and lock monitor of a synthesizer, so that a failure can be immediately detected and dealt with. In addition, when there are a plurality of base stations, there is a case where a fault is detected by monitoring each other.

[0003]

However, in the conventional hardware failure detection method, the cost and the size of the base station increase, which may hinder installation. Further, there is a problem that a failure in the receiving system cannot be detected. In addition, the method of monitoring each other receives radio waves from other base stations and determines which base station has a fault, which is very complicated, and it is difficult to determine accurately in a short time. is there.

[0004] When monitoring is performed on the control channel, there is no guarantee for the communication channel. Further, when monitoring is performed on the communication channel, there is a problem that the control channel is not guaranteed and the number of communication channels used by the user decreases.

SUMMARY OF THE INVENTION The present invention has been made in consideration of the above problems, and has as its object to provide a method for detecting a failure in a base station, which measures the access interval and detects the presence or absence of a failure.

[0006]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention relates to a method for detecting a failure in a base station connected to an ISDN network and relaying with a portable telephone using radio waves.
Access interval information is stored in the base station, and the base station is provided with an access interval measuring means for measuring a time interval of access from the mobile phone, and whether the base station is periodically accessed from the mobile phone is determined. And the access interval measuring means measures a time interval, and when a continuous time during which no access is made exceeds the access interval of the access interval information, it is determined that a failure has occurred depending on the degree and processed.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION

Embodiment 1 An embodiment of the present invention will be described below in detail with reference to the drawings. Figure 3 shows the configuration of the base station and ISD
It is a figure showing the example of connection to N network. As shown in the figure, the base station 3 is connected to the ISDN 1 like the center 2, and is connected to the mobile phone 4 via radio waves. Base station 3 is D
SU (Digital Service Unit) 3-1, Line Control Unit 3-2, Control Unit 3-3, CPU (Central Processing Unit) 3-3
-1, memory 3-3-2, timer 3-3-3, RTC
(Real time clock) 3-3-4, Wireless control unit 3-
4. An antenna 3-5 is provided.

A signal transmitted from the mobile phone 4 is received by an antenna 3-5, demodulated by a radio control unit 3-4, digitized by a control unit 3-3, and digitized by a line control unit 3-2.
U (digital service unit) 3-1 via ISD
Output to N network 1. On the contrary, the signal from the ISDN 1 is modulated by the radio control unit 3-4 via the DSU 3-1 and the line control unit 3-2 and the control unit, and transmitted as a radio signal from the antenna 3-5.

The control unit 3-3 includes a CPU 3-3-1, a memory 3-3-2, a timer 3-3-3, and an RTC 3-3-4, and performs signal processing, protocol processing, and overall processing of the base station 3. Perform control. The memory 3-3-2 has a CPU 3-3-
1 stores programs to be executed, data on access intervals for each time zone based on statistical information, data on short access periods, a counter for measuring the current access interval, and the like.

FIG. 1 is a diagram showing a processing flow of a failure detection method for a base station according to the present invention. The program for executing this flowchart is stored in the memory 3-3-2,
It is repeatedly executed at an appropriate cycle according to 3-1.

FIG. 2 is a diagram showing access interval information based on statistical information and a current access interval.
Shows access interval information for each time zone, and FIG. 10B shows a counter for measuring the current access interval. CPU3-
3-1 periodically executes the processing of FIG. 1 to check whether or not the base station 3 is accessed, add a time during which the base station 3 is not continuously accessed, and compare it with an access interval based on statistical information to determine whether a failure has occurred. to decide. Both data are stored in the memory 3-3.
-2 is used in the program shown in FIG.

The procedure of the fault detection method will be described with reference to FIG. First, RTC (real time clock) 3-3-4
Is read from (step ST11). The access state from the mobile phone 4 is checked (step ST1).
2) If there is no access, the statistical information is referenced to check whether or not the access is short (step ST1).
3). If the access period is too short, the counter is cleared (step ST14) and the process ends. This period is a time period during which there is no access, such as midnight, and is not a target for failure detection.

In step ST13, if the access period is not too short, the current period (access check period) is added to the counter (step ST1).
5) Compare the value of the counter with the access interval of the statistic information in the time zone to check whether the current counter value is somewhat longer than the access interval of the statistic information (the criterion is that a failure occurs due to statistics). It is determined whether or not a failure has occurred (step ST16). If it is determined that a failure has occurred, the base station 3 sends the block to the center 2 via the line control unit 3-2 and the DSU 3-1. Is notified that a failure has occurred (step ST17).

In step ST12, the access status from the mobile phone 4 is checked, and if there is access, the counter is cleared (step ST18).
Referring to the statistical information, it is checked whether or not the access is in a short period (step ST19). If the access is in the short period, the statistical information is updated and the short access period is changed according to the program (step ST20).

As described above, according to the present embodiment, the time during which access is not continuously performed is compared with the access interval based on the statistical information to determine the occurrence of a failure in the receiving system block. The overall reliability is increased. Also, no special hardware is required and the size is reduced at low cost. In addition, it is possible to detect a failure on a base station basis, and the configuration is simplified. Further, it becomes easy to obtain information for considering traffic such as an effective arrangement of base stations.

[Embodiment 2] FIG. 4 is a diagram showing another example of the processing flow of the method for detecting a failure in a base station according to the present invention. Here, a method of determining the access count measurement period on a daily basis and detecting a failure in the base station is described. The procedure of the failure detection method will be described with reference to FIG. This program is activated once a day. First, RTC (real-time clock) 3-
The date is read from 3-4 (step ST41). The access state from the mobile phone (terminal) 4 is checked (step ST42). If there is no access, the statistical information is referred to and it is checked whether or not the access is short (step ST43). If the counter is 0 during the short period of access (step ST44), the process ends. This period is a period during which there is no access and is not a target of failure detection.

If it is determined in step ST43 that the access is not in the short period, or if the previous count is performed in the short access period, the count is added to the counter (step ST45).
T46), the database is corrected, and the date to be determined is registered in the access shortage period (step ST47), and DS
The base station 3 notifies the center 2 via U3-1 that a failure has occurred in the block of the receiving system (step ST4).
8), the counter is cleared (step ST49), and the process ends.

In step ST42, the access status from the mobile phone 4 is checked, and if there is access, the counter is cleared (step ST50), and it is checked whether or not the access is in a short period by referring to the statistical information. If the access from the mobile phone 4 is more than 20 times during the short access period (step ST51) (step ST52), the database is corrected and the date to be determined is deleted from the short access period (step ST51). Step ST5
3). The number of accesses (statistical information) from the mobile phone 4 is initialized (step ST54), and the process ends.

As described above, according to the embodiment of the present invention, if the days of no access are consecutive (in the above example, 3 days).
Day) The center 2 is notified that there is a possibility of a failure, and the period is registered in the access shortage period. The period is automatically deleted if the number of accesses actually increases even if it is registered during the access shortage period. Accordingly, the occurrence of a failure in the receiving system block is determined according to the environment such as the communication traffic (traffic), so that the reliability of the entire base station is improved. In the above embodiment, since the processing is performed by software, the criterion for determining the occurrence of a failure, the criterion for registration / deletion during a short access period, and the like can be easily changed and set.

[0020]

As described above, according to the present invention,
The following excellent effects can be obtained. (1) The access interval information is stored in the base station, and the time interval at which the base station is accessed from the mobile phone is measured. If the continuous non-access time exceeds the access interval of the access interval information, As a result, it is determined that a failure has occurred in the receiving system block and the processing is performed (notified to the center), so that there is immediacy and the reliability of the base station as a whole increases.

(2) No special hardware is required, and the size is reduced at low cost.

(3) In addition, it is possible to detect a failure in a receiving system block for each base station, and the configuration is simplified.

(4) Further, it is easy to obtain information for considering traffic such as effective arrangement of base stations.

[Brief description of the drawings]

FIG. 1 is a diagram showing an example of a processing flow of a failure detection method for a base station according to the present invention.

FIGS. 2A and 2B are diagrams showing access interval information based on statistical information and a current access interval, wherein FIG. 2A shows time interval access interval information and FIG. 2B shows a counter for measuring the current access interval. is there.

FIG. 3 is a diagram illustrating a block configuration of a base station and an example of connection to an ISDN network.

FIG. 4 is a diagram showing another example of the processing flow of the failure detection method for a base station according to the present invention.

[Explanation of symbols]

 1 ISDN Network 2 Center 3 Base Station 3-1 DSU (Digital Service Unit) 3-2 Line Controller 3-3 Controller 3-3-1 CPU (Central Processing Unit) 3-3-2 Memory 3-3 -3 timer 3-3-4 RTC (real-time clock) 3-4 wireless controller 3-5 antenna 4 mobile phone

Claims (1)

(57) [Claims] 1. A method for detecting a failure of a base station connected to a telephone network and relaying to a mobile phone by using a wireless communication, wherein access interval information is stored in the base station, and the mobile station stores the access interval information in the base station. An access interval measuring means for measuring a time interval accessed from the telephone; periodically checking whether or not the base station is accessed from the mobile phone; the access interval measuring means measuring the time interval; A method for detecting a failure in a base station, characterized in that if a continuous time that is not performed exceeds an access interval of the access interval information, it is determined that a failure has occurred according to the degree of the failure and the processing is performed.