JPH10174152A - Mobile communication system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a mobile communication system in which a fault of a base station is analyzed in real time and the fault is easily and surely analyzed. SOLUTION: A mobile communication system having a plurality of base stations 1a, 1b,..., 1n is provided with a debug terminal equipment 9 that analyzes a fault in the base stations and nonvolatile memories which are provided to a plurality of base stations to store telephone numbers of the debug terminal equipment 9. On the occurrence of a fault in a base station, a telephone number stored in the nonvolatile memory is dialed and the data required for fault analysis are sent to the debug terminal equipment 9, in which the fault is analyzed in real time based on the data received.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mobile communication system, and more particularly to a failure analysis method for analyzing a failure of a base station in real time.

[0002]

2. Description of the Related Art In a conventional mobile communication system, a maintenance monitoring center and a plurality of base stations are connected by PVC packets, and packet messages are transmitted and received between the maintenance monitoring center and each base station. Is being monitored. Normally, the operation of the base station is monitored by inquiring the status of each base station from the maintenance monitoring center once a day.

[0003] Particularly, in a PHS system, since the radio area is a small zone, the number of base stations is enormous.
Also, there are many places where they are not suitable for maintenance work, such as outdoor high places and the upper part of telephone poles. Therefore, as described above, the maintenance monitoring center and the plurality of base stations are connected by the PVC packet, and the plurality of base stations are intensively remotely monitored.

[0004]

In the prior art, when a failure occurs in a base station, it takes time to detect the failure, and if the status is inquired once a day from the maintenance and monitoring center, the failure may occur. It takes up to a day to detect. For these reasons, the data at the time of occurrence of a failure in the base station may not be saved, and the cause may not be found even if the failure station is investigated.

[0005] In such a case, wait for the same fault to be reproduced, and immediately investigate the occurrence of the fault, or construct the same system for fault analysis and perform continuous operation to reproduce the same fault. Investigating obstacles by doing. However, in such a method, since the failure analysis is performed after the failure occurs, not only does it take time to investigate the failure, but also there is a problem that the trouble analysis requires troublesome work.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a mobile communication system capable of analyzing a failure of a base station in real time and analyzing the failure easily and surely.

[0007]

SUMMARY OF THE INVENTION The present invention provides a debugging terminal for analyzing a failure of a base station in a mobile communication system having a plurality of base stations. Storage means for storing a telephone number of the debugging terminal, provided in a plurality of base stations, and when a failure occurs in the base station, a call is transmitted to the telephone number stored in the storage means. By transmitting data required for failure analysis to the debugging terminal,
The method is characterized in that a failure is analyzed in real time based on data transmitted from the debugging terminal.

[0008]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a block diagram showing a configuration of a mobile communication system according to an embodiment of the present invention. In FIG. 1, reference numerals 1a, 1b,..., 1n denote base stations for relaying outgoing / incoming calls from mobile stations (not shown). Each base station is installed for each predetermined service area. Each of the base stations 1a, 1b,..., 1n is provided with a non-volatile memory, and the non-volatile memory stores a telephone number of a debugging terminal 9 described later.

FIG. 2 shows detailed data contents of the nonvolatile memory. In FIG. 2, the called number information element identifier is an identifier used for the ISDN line and indicates a called number, the number type is a type indicating domestic use, and the number plan identifier is an identifier indicating use on the ISDN line. The telephone number of the debugging terminal is a predetermined telephone number of the debugging terminal 9 provided for analyzing the failed station as described above. If a failure occurs in any of the base stations, the failure station automatically sends a call to this telephone number, and the failure station transmits data when the failure occurs.

Reference numeral 2 denotes a maintenance monitoring center for monitoring a plurality of base stations 1a, 1b,... The maintenance management center 2 and the plurality of base stations are connected to the ISD
They are connected by N lines and are usually connected by PVC packets using the D channel of this line. The maintenance monitoring center 2 remotely recovers a failed station when a failure occurs in the base station. 3 is a PHS local network, 4 is an exchange for connecting each base station to a general subscriber telephone, 5 is an exchange 4
And an ISDN line connecting each base station, and 6 is a DSU
(Digital line terminal device).

Further, 7 is an ISDN network, 8 is an exchange for connecting a general subscriber telephone, and 9 is each base station 1a, 1
b,..., a debugging terminal for analyzing a failed station when a failure occurs in 1n. Debugging terminal 9
Has fault analysis software and a processor circuit (not shown) for performing fault analysis using the fault analysis software as shown in FIG. 3, and performs fault analysis based on data transmitted from the fault station. Perform analysis.

That is, when a failure occurs in any of the base stations, the failure station transmits the data at the time of the failure transmission to the debugging terminal 9 as described above. The analysis software is configured to analyze the fault in real time using data at the time of the fault occurrence. Further, the debugging terminal 9 is always set to a state in which a call can be received in order to analyze a failure in real time.

Next, a specific operation of the present embodiment will be described with reference to FIGS. First, FIG. 4 shows an operation sequence of the base station 1a, 1b,..., 1n and the debugging terminal 9 when a failure occurs. In FIG. 4, first, when a failure occurs in any of the base stations, the failed base station recognizes the occurrence of the failure and the notification of the failure to the debugging terminal 9, and automatically detects the non-volatile memory provided inside. A call is made to the telephone number of the debugging terminal 9 stored in the memory of the caller and a call connection with the debugging terminal 9 is established. in this case,
The ISDN line has two channels, a B channel and a D channel. Call connection is performed using the D channel. The B channel is used for transmitting and receiving data between the faulty station and the debugging terminal 9.

For example, if a failure occurs in the base station 1a of FIG. 1, the base station 1a refers to the telephone number in the non-volatile memory and sends a call to the debugging terminal 9 to set up the call as shown in FIG. Do. The procedure for the call connection between the base station and the debugging terminal 9 is determined in advance by the ISDN.
As shown in (1), call setting is accepted, called, and responded in order. In this way, the call connection between the base station 1a and the debugging terminal 9 is completed, and data communication is possible between the two.

When the call connection is completed, data transmission / reception is performed between the base station and the debugging terminal 9 according to a predetermined message, and data necessary for failure analysis is transmitted from the base station to the debugging terminal 9. . In this case, data transmission and reception are performed using the B channel as described above.
FIG. 5 shows an operation sequence when data is transmitted and received using the B channel. Also in this case, the base station 1a
It is assumed that a failure has occurred.

In FIG. 5, first, when the call connection is completed, the debugging terminal 9 requests data for failure analysis from the base station 1a. The request for data for failure analysis from the debugging terminal 9 includes a memory for dump data as shown in FIG.
Includes I / O type, address, request length, etc.
In response to this request, the base station 1a transmits to the debugging terminal 9 data necessary for analyzing a failure when a failure has occurred. In this case, since the amount of data that can be transmitted at one time is limited, the debugging terminal 9 repeatedly requests the base station 1a for failure analysis data as shown in FIG. 9 to send the data.

When data transmission / reception is performed as described above and all the data for failure analysis is transmitted from the base station 1a to the debugging terminal 9, the base station 1a performs a procedure predetermined by the ISDN as shown in FIG. And disconnect the line according to. Similarly, the debug terminal 9 releases the line according to a predetermined procedure, and completes the release with the base station 1a.

On the other hand, when the debugging terminal 9 receives all the failure analysis data transmitted from the base station 1a, the internal processor circuit activates the failure analysis software and converts the transmitted failure analysis data into data. Perform failure analysis based on the failure. The debugging terminal 9 analyzes the failure of the base station 1a by using the failure analysis software as described above, and when the failure analysis is completed, transmits the obtained failure analysis result to the maintenance monitoring center 2. The maintenance monitoring center 2 remotely performs a recovery process on the base station 1a based on the transmitted failure analysis result. From the above,
When a failure occurs in the base station, a series of processes from transmission of the failure analysis data to the debugging terminal 9, analysis of the failure using the transmitted data, and restoration of the failure station of the maintenance monitoring center 2 are completed. I do.

[0019]

As described above, according to the present invention, when a failure occurs in a base station, data necessary for analyzing the failure is transmitted to the debugging terminal, so that the data when the failure occurs in the base station is transmitted. Is not lost, can be reliably acquired by the debugging terminal, and the failure can be analyzed in real time based on the data transmitted by the debugging terminal. Therefore, not only can the cause of the failure of the base station be surely investigated, but also the time from the occurrence of the failure to the analysis of the failure can be shortened, so that the time until the failure of the base station is restored can be reduced.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of an embodiment of a mobile communication system according to the present invention.

FIG. 2 is an explanatory diagram showing detailed data contents of a nonvolatile memory provided in each base station in the embodiment of FIG. 1;

FIG. 3 is an explanatory diagram showing data contents of a debugging terminal of the embodiment of FIG. 1;

FIG. 4 is a flowchart showing an operation sequence between a base station and a debugging terminal of the embodiment of FIG. 1;

FIG. 5 is a flowchart showing in detail the transmission and reception of B-channel data in the operation sequence of FIG. 4;

[Explanation of symbols]

 1a, 1b,..., 1n base station 2 maintenance and monitoring center 3 PHS local network 4, 8 exchange 5 ISDN line 6 DSU 7 ISDN network 9 debugging terminal

Claims (2)

[Claims] In a mobile communication system having a plurality of base stations, a debugging terminal for analyzing a failure of the base station and a telephone number of the debugging terminal provided in the plurality of base stations are stored. When a failure occurs in the base station, a call is made to a telephone number stored in the storage means, and data necessary for failure analysis is transmitted to the debugging terminal. A mobile communication system for analyzing a failure in real time based on data transmitted from the debugging terminal. 2. The mobile communication system according to claim 1, wherein said debugging terminal is always set to a call-receiving state.