KR100357704B1 - Method for detecting error of signal device in a mobile communication exchange - Google Patents

Abstract

The automatic signal equipment error detection method of a mobile communication switch according to the present invention is to determine whether or not re-use is possible by testing equipment in real time to determine whether the cause is a function of signaling equipment when an R2 call processing fails. It is possible to minimize the call failure rate due to the re-use of the device by determining the abnormality within the shortest time, and also to quickly identify the error in the use of many signaling equipment and to find the cause of the actual equipment failure. It is to reduce human costs.

Description

Method for detecting error of signal device in a mobile communication exchange

The present invention relates to a method for automatically detecting a signal equipment error of a mobile communication switch. In particular, the signal equipment of a mobile communication switch that can reduce the call failure rate due to the reuse of the signal equipment by determining the abnormality of the signal equipment within the shortest time. An automatic error detection method is provided.

In general, a mobile communication switch (PCS switch) is a wired / wireless hybrid digital switch that performs an intelligent network service in conjunction with other networks and performs visitor location information management.

FIG. 1 is a diagram schematically illustrating a configuration of a general mobile communication switch, and as shown in FIG. 1, the mobile communication switch includes a central control subsystem (CCS), an intercinnection network subsystem (INS), and an access switching subsystem (ASS). Consists of.

CCS performs system maintenance and various statistical functions, control and management of hard disk and auxiliary memory, control various inputs and outputs from the operator, and connects data channels with other systems.

In addition, INS connects CCS and ASS or ASS mutually, performs number translation, route control, centralized call processing, and functions as a network synchronizer.

In addition, ASS-S (Access Switching Subsystem-Subscriber) connects analog subscribers (general landline telephone subscribers) with digital INS, and ASS-I (Access Switching Subsystem-ISDN) connects with ISDN subscribers. -T (Access Switching Subsystem-Trunk) performs connection with the trunk line between stations, and ASS-7 (Access Switching Subsystem-No 7) performs packet processing.

On the other hand, ASS-W (Access Switching Subsystem-Wireless) performs call processing of personal communication subscribers, subscribers capable of interworking with PBC handoff processing, BC and No.7 signal matching processing, and VLR (Visitor Location Resister). Perform management of mobility and maintenance of radio access channels. Here, the VLR, that is, the visited subscriber location registration device, performs the functions of identification management of the subscriber, such as location information, subscriber number, and terminal routing number, and location registration and location update for each subscriber.

In addition, it supports call processing and authentication procedures for outgoing subscribers, supports encryption, and manages necessary subscriber databases such as additional service subscription information.

FIG. 2 is a diagram illustrating the structure of signaling equipment of a general mobile communication switch. As shown in FIG. 2, the structure of signaling equipment performs the state management and testing of the signaling equipment and determines that the signal equipment is impaired. Signaling device maintenance block 1a to be excluded from service, fixed call, incoming / outgoing processing is performed, and when the idle line is requested, the subscriber line maintenance block 1a requests the subscriber line status to idle. A call processing block 1b for performing / incoming, a signaling equipment control processor 6 for controlling the operation mode of the signaling equipment, and transmitting the received signal information to the matching exchange subsystem 1, and a channel to the signaling equipment. When the information and performance function operation mode information are transmitted, a group of signal equipment for outputting the R2MFC, DTMF, continuity test tones and audible tones to the time switch 8 according to the function information designated for each channel (7). Alarm information such as a time switch (8), a signal equipment board and a time switch (8), and a time slot interchange function, a signaling device, a recording guide device, a subscriber line matching device, and a relay line matching device. It consists of an alert collector 9 that collects and delivers the device line status to the subscriber line maintenance block 1a of the match exchange subsystem 1. Here, the signal equipment 7 receives the R2MFC, DTMF, and PCM (Pulse Code Modulation) input data of the continuity test tone signal input through the time switch 8, receives and detects each channel, and then the signal equipment processor 6 To notify).

Let us briefly explain the test method for subscriber line matching device and signaling equipment path in such a mobile switching center.

First, the conventional subscriber line test function is not provided inside the exchange. However, in the case of signaling equipment test, there is a function to test some internal paths by configuring a path to the time switch stage without connecting subscriber lines.

Such a test has a limitation in testing only a part of a path connected on an actual subscriber line service, and there is a problem in that it is not possible to determine whether there is an abnormality of a subscriber line.

Conventional subscriber line tests are performed by connecting external separate equipment to the subscriber line. In such a case, separate equipment must be purchased, and each individual line must be connected and tested, so an interface function between the subscriber line and external equipment must exist.

In the case of connecting and testing external equipment, it is impossible to verify the connection path between the subscriber line and the signal equipment because the operator cannot control the path connection between the subscriber line and the signal equipment.

As a result, the function of monitoring the abnormality of the signaling equipment provided by the existing mobile communication switch has the function of sequentially testing one channel per predetermined time term without any abnormality or abnormality of all signaling equipment channels. . In this case, after testing one channel, if you need to test the channel again, you need time as the number of time term × signal equipment channels, and if the term time is small because this time is to test sequentially regardless of normal / abnormal As a result, the load on the system, and the large number of signaling equipment channels, significantly lengthens the test time term for each channel. Therefore, even if the test considering the time and the number of channels, there is a problem that can not immediately determine whether there is a channel abnormality.

Therefore, the present invention has been made to solve the above problems according to the prior art, the object of the present invention is to test the equipment in real time to determine whether the cause is in the function of the signal equipment when the R2 call processing failure The present invention provides a method for automatically detecting a signal equipment error of a mobile communication switch that determines whether it can be reused and makes it known to an operator.

A feature of the automatic signal equipment error detection method of a mobile communication switch according to the present invention for achieving the above object is an R2 relay in the signal equipment error detection method of a mobile communication switch having a TCR, RTTA, TCDT, TDSL, TLSI Determining whether a received call is occupied by an R2 outgoing call or a receiving incoming call by a TCR (Transit Call Control for R2) that is an upper block of the ASP in charge of the call; If the result of the determination is that the call received by the TCR is occupied by the R2 outgoing call, the TCR block notifies the TLSI block of the occupancy of the signaling equipment necessary to prepare for call setup.If the call received by the TCR is occupied by the receiving side, TLSI In the block, initializing signaling equipment and recognizing a channel occupation state; Managing step by step such that data transmission and reception are normally performed in the TLSI block; Determining whether data is normally transmitted or received in the TLSI block or whether an error occurs or not; Performing test routing on a corresponding channel of a corresponding signal device when an error occurs and an abnormal transmission / reception occurs as a result of the determination; Channel release processing if the test is normal, and if an error occurs, notifying the upper DCDT of the result to limit re-occupancy of the corresponding channel; The TCDT notified of the error occurrence is reflected in the TDSL to prevent the corresponding signal channel from being reused in the future.

1 is a view schematically showing a configuration of a general mobile communication switch,

2 is a view showing the signal equipment structure of a general mobile communication switch,

3 is a view showing a detailed structure of an ASS-T block shown in FIG.

4 is a flowchart illustrating an operation of a signal equipment error automatic detection method of a mobile communication switch according to the present invention;

<Explanation of symbols for main parts of drawing>

11 trunk interface 12 time switch

13: RTTA 14: ASP

15: TLSP

Hereinafter, a method for automatically detecting a signal equipment error of a mobile communication switch according to the present invention will be described in detail with reference to the accompanying drawings.

First, the technical principle of the automatic signal equipment error detection method of the mobile communication switch according to the present invention.

The signaling equipment test mechanism provided by the existing mobile communication switch and the test mechanism of the present invention basically use the same test function. However, it is the gist of the present invention to make a change at the time of starting the test.

Conventionally, the method of repeating the test of the signal equipment is fixed at every predetermined term, but the present invention controls the actual signal equipment and determines that the cause of the call processing failure in the block participating in the R2 call processing control is higher than the signaling equipment. The test is performed immediately on the relevant channel regardless of the result, and if the result is abnormal, it is notified to the upper block (block having the existing test mechanism) to prevent reuse of the signaling equipment channel.

In addition, the most important function for the automatic test of signaling equipment is to determine whether there is a possibility of signaling equipment related to R2 call processing failure, and to immediately test the corresponding channel occupied.

It is designed to have an active test function in the sub-software block Time Switch Local Signal Interface (TLSI) that controls the actual device, performs the register signaling function, and is responsible for the actual operation of the existing test function. will be.

FIG. 3 is a diagram showing the detailed structure of the ASS-T block shown in FIG. 1 and has three components as follows for the R2 relay call.

That is, as shown in FIG. 3, the ASP 14 is a hardware module in which upper software blocks of a subsystem are loaded and executed, and the time switch local signal processor (TLSP) 15 is a lower software block for controlling signaling equipment. TLSI (Time Switch Signal Interface) (not shown) is a module that is loaded and performed, RTTA (R2MFC / DTMF / CCT, Audible Tone Transceiver Receiver Board Assembly) 13 unit is a device that performs the actual hardware function.

The ASP 14 includes an upper block TCR (Transit Call Control for R2) in charge of the R2 relay call, a Telephony Common Device Test (TCDT) block in charge of testing, and a TDSL (Telephony Device Supervision Library) that collects and manages the state of the equipment. And the like.

IPC signal communication is performed between the upper and lower software blocks, and the TLSP 15 and the RTTA 14 are connected through a TD-bus, and are used by the TLSI block controlling the bus to communicate with each other.

Hereinafter, a method of automatically detecting a signal equipment error of a mobile communication switch according to the present invention will be described with reference to FIGS. 3 and 4.

4 is a flowchart illustrating an operation of an automatic signal equipment error detection method of a mobile communication switch according to the present invention.

First, it is determined whether a call received by a Transit Call Control for R2 (TCR), which is an upper block of the ASP 14 that is in charge of the R2 relay call, is occupied by an R2 outgoing call or a receiving incoming call (S101).

Subsequently, as a step of recognizing the TCR call and the signaling equipment, if the call received by the TCR is occupied by the R2 outgoing call, the TCR block notifies the TLSI block of the occupancy of the signaling equipment necessary to prepare for call setup. If the call received by the TCR is occupied by the receiving side incoming call, the TLSI block initializes the signaling equipment and recognizes the channel occupancy state. In this case, the TCR block and the TLSI block on the destination exchange side perform the same operation (S102).

Subsequently, step-by-step management is performed to normally perform the data transmission / reception process (S103). In other words, the TLSI block notified of the transmission data transmits this information to the RTTA 13 to change the corresponding information into a register tone.

The receiving (receiving) side TLSI block continuously checks whether a register tone has been received from the RTTA 13 channel already occupied in step S102.

That is, if there is data received in the TLSI block, it is notified to the upper block TCR. On the other hand, the TLSI continuously monitors whether there is no problem in the process of sending data received from a higher level or data received from another exchange to a higher level. In addition, the TLSI performs all processes such as a timer and a state transition according to a specification as a specification for a monitoring function.

Therefore, in the TLSI block, it is determined whether normal termination or transmission or reception of data is generated (S104).

That is, if data transmission and reception is normally performed, the TLSI checks the normality of the signal equipment. When it is judged that data transmission and reception was not normal, that is, when there is no response from the counterpart within a predetermined time or when necessary data is not normally received from a higher level, the call is failed by its own algorithm. If in doubt, monitor if this is the case.

Subsequently, after error determination, a test is performed on the signaling equipment channel, and the result is read from the TLSI block (S105). That is, in the case of the error set in step S104, test routing for the corresponding signal channel is performed. It generates the device self test tone and determines whether it recognizes it normally and whether the actual operation tone through the call path is recognized.

Test tones have different tones for the self test of the equipment and different types of tones used in different countries.

Then, the notification and the channel for the test result is released (S106). That is, if the test is normal, only the channel release processing is performed. In case of an error, the upper TCDT block is notified of this result to prevent reoccupancy.

Subsequently, the TCDT received the notification of the occurrence of an error in the process of reflecting the state management reflects this to the TDSL block to prevent the corresponding signal channel from being used again later (S107).

Automatic signal equipment error detection method of a mobile communication switch according to the present invention as described above is to determine whether or not reusable by testing the equipment in real time to determine whether the cause of the function of the signal equipment when the R2 call processing failure As a result, it is possible to minimize the call failure rate due to the reuse of the device by determining the abnormality of the signal equipment in the shortest time.

In addition, there is an effect that can quickly identify the error in the use of a large number of signaling equipment to reduce the time and human cost to find the cause of the actual equipment failure.

Claims (5)

In the signal equipment error detection method of a mobile communication switch having a TCR, RTTA, TCDT, TDSL, TLSI, Determining whether a received call is occupied by an R2 outgoing call or a receiving incoming call by a TCR (Transit Call Control for R2), which is an upper block of the ASP in charge of the R2 relay call; If the result of the determination is that the call received by the TCR is occupied by the R2 outgoing call, the TCR block notifies the TLSI block of the occupancy of the signaling equipment necessary to prepare for call setup.If the call received by the TCR is occupied by the receiving side, TLSI In the block, initializing signaling equipment and recognizing a channel occupation state; Managing step by step such that data transmission and reception are normally performed in the TLSI block; Determining whether data is normally transmitted or received in the TLSI block or whether an error occurs or not; Performing test routing on a corresponding channel of a corresponding signal device when an error occurs and an abnormal transmission / reception occurs as a result of the determination; Channel release processing if the test is normal, and if an error occurs, notifying the upper DCDT of the result to limit re-occupancy of the corresponding channel; Method for automatic detection of signal equipment error of a mobile communication switch, characterized in that the TCDT notified of the occurrence of the error is reflected to the TDSL so that the corresponding signal channel is not reused later. The method of claim 1, The step of determining whether the data is normally transmitted or received or an error has occurred abnormally is transmitted and received, by transmitting the information to the RTTA in the TLSI block notified of the transmission data and changing the corresponding information into a register tone. ; At a called (receiving) side block, continuously checking whether a register tone has been received from the occupied RTTA channel; If there is any data received, it is notified to the upper block, and the TLSI continuously monitors whether there is no problem in sending the data received from the upper layer or the data received from another exchange to the upper layer. Automatic detection of signal equipment error. The method of claim 1, When the transmission and reception of the data is normally performed, the TLSI checks the normality of the signaling equipment, and if the transmission and reception of the data is abnormal, fail the signal equipment error of the mobile communication switch, characterized in that the call is failed by its own algorithm. Way. The method of claim 1, After the error determination, the step of performing test routing on the corresponding channel of the signaling equipment is characterized by generating a device self test tone, determining whether it is normally recognized and whether the actual operating tone is recognized through the call path. Signaling device error detection method of a mobile communication switch. The method of claim 4, wherein The device self test tone is a tone for a signal device self test and a tone actually used by another station, and the signal device error detection method of the mobile communication switch, characterized in that for testing both tones.