JPH0580879B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (1) Technical Field of the Invention The present invention relates to a system initialization method when a terminal failure occurs in an electronic exchange system configured with a distributed function multiprocessor.

(2) Prior art and problems An electronic switching system composed of a functionally distributed multiprocessor exchanges information with a terminal line control processor that accommodates multiple lines to which terminals are connected. For example, in the case of a digital terminal, synchronous communication is performed between the terminal and the terminal line control processor. Further, the main control processor sends a periodic message to the terminal line control processor at regular intervals, and the terminal line control processor sends a response message to the periodic test message to the main control processor.

In a system having such a configuration, failure recovery processing is required when the terminal itself connected to the terminal line control processor becomes faulty, or when the terminal line control processor itself becomes faulty.

Conventionally, when a terminal line control processor detects an abnormality in a terminal due to an out-of-synchronization or the like, the terminal line control processor notifies the main control processor of the failure of its own terminal line control processor. Furthermore, when detecting a terminal line control processor failure, the main control processor recognizes that the terminal line control processor has failed when a response to a periodic test message cannot be received for a certain period of time.

Here, the main control processor that recognized the failure
Regardless of whether the faulty device is a terminal or a terminal line control processor, a reset signal is sent to the terminal line control processor that detects the fault to forcefully initialize the entire device. The terminal line control processor that has been installed will turn off the power supply to all terminals connected to it.
The initial settings of the terminal were being performed by turning on, etc.

For this reason, conventionally, all calls related to the terminal line control processor in which a terminal failure has been detected are locked, even if they are not directly related to the terminal in which the failure has occurred. It was hot.

(3) Purpose of the Invention In order to solve the above-mentioned problems, an object of the present invention is to detect a failure in a terminal-compatible manner when initializing a terminal that has caused a failure, and to change the initial setting target to the corresponding terminal and its terminal. The purpose of the present invention is to provide a method that is limited to terminals related to calls and does not affect other calls.

(4) Structure of the Invention In order to achieve the above object, the present invention provides a dedicated processor LPR that accommodates and controls a terminal line, a main control processor MCPR that exchanges control signals with the dedicated processor LPR, and a main control processor MCPR that exchanges control signals with the dedicated processor LPR. In an electronic switching system having a call management information block a for managing location information of a plurality of terminals forming a connected call and a connection status of the call for each call in the main memory MEM of the MCPR, Main memory of control processor MCPR
Terminal control information TCM consisting of the failure status of the terminal and the corresponding address of the call management information block a is provided in the MEM corresponding to the terminal line, and the main controller receives the terminal failure notification from the dedicated processor LPR. The processor MCPR extracts the location information of the terminal connected to the faulty terminal based on the terminal control information TCM corresponding to the faulty terminal, and sends the processor MCPR to a dedicated processor LPR that controls the faulty terminal and each of the extracted terminals. ,
The present invention is characterized in that initial settings are requested only for the faulty terminal and the extracted terminal.

(5) Embodiments of the Invention The present invention provides that in a multiprocessor system, in order to control a terminal, it is essential to send and receive information between the main control processor and the terminal line control processor, and the terminal line control processor Focusing on the fact that call processing operations can be performed using the same call management information from call generation to call termination, terminal status display and call management are performed as terminal control information for each terminal line in the main control processor. By setting information on the information destination, failures can be detected for each terminal using the above information, and initial settings can be made only for failure-related terminals.This will be explained in detail below with reference to embodiments.

FIG. 1 is a system configuration diagram according to the present invention.
In the figure, NW is a switching network, SUB is a telephone terminal, LC is a subscriber circuit, MCPR is a main control processor, and MEM is a memory. The network NW is controlled in a time-sharing manner by a main control processor. The subscriber circuit LC is equipped with a terminal line control processor LPR, and the exchange of control signals, etc. with the main control processor MCPR is performed via the switching network NW.
It is inserted into a time slot in the telephone and is transmitted and received over a telephone line. Terminal control information TCM is provided in the memory for each terminal, and the terminal control information TCM includes, for example, terminal status display TST and call management information.
There is CDBN, and TST is “normal” and “faulty”.
There are three states: "initial setting request in progress". The main control processor MCPR is provided with a terminal control function section P1, a terminal failure detection section P2, and a terminal initialization section P3.
The terminal control function section P1 is the main control processor MCPR.
The terminal line control processor LPR sends and receives control signals, etc. to and from the terminal line control processor LPR, and refers to the call management information block a that manages the connected call and the accommodation locations of the plurality of terminals that make up the call. The function performs address linkage by displaying the address a of the call management information block a in the call management information CDBN of the terminal control information TCM corresponding to the terminal control information TCM. When receiving a terminal failure notification message, it has a function to set "failure" in the terminal status display TST of the terminal control information TCM of the corresponding terminal. Furthermore, in the case of a failure in the terminal line processor LPR, that is, when a failure is detected from the terminal line processor LPR by the above-mentioned periodic monitoring, P1 initializes the entire line control device LPR by the above-mentioned reset signal. “Failure” in terminal status display TST of terminal control information TCM corresponding to all terminals
It has the function to set. The terminal failure detection unit P2 detects a terminal whose terminal status display TST of the terminal control information TCM is "failure", and if the call management information block has address linkage to the call management information CDBN of the terminal control information TCM, call management information is detected. It has a function that uses the block to extract all terminals related to the call, sets "initial setting requesting" to the terminal status display TST of the terminal control information TCM corresponding to the terminal, and deletes the link in the call management information block. . The terminal initial setting unit P3 detects a terminal whose terminal status display TST in the terminal control information TCM is "requesting initial setting", and requests the terminal line control processor LPR of the line equipment LC accommodating the terminal to initialize the terminal. Terminal initial setting request message requesting settings (the difference is that the reset signal is the initial setting for a single terminal, whereas the reset signal is for the initial setting for the entire device)
The terminal is provided with a function to send "normal" to the terminal status display TST of the terminal control information TCM of the terminal after the initial setting is completed. As described above, the terminal control function unit P1 detects a failure in the terminal, and the terminal failure detection unit P2 and the terminal initialization unit P3 initialize the failed terminal and related terminals, thereby performing initial settings for the failed terminal.

This will be explained below using a specific example. FIG. 2 is an explanatory diagram for explaining call processing control according to the present invention, and FIGS. 3A to 3C show transition states of control information accompanying call control according to the present invention. Normally, when telephone terminals A and B are under call processing control such as during a telephone conversation, as shown in Fig. 2,
Terminal control information A-TCM, B-TCM of terminals A and B
The terminal status display TST is set to normal display,
Each call management information CDBN stores an address that is linked to the same call management information block a. Call management information block a stores call path information (time slot numbers, etc.) for terminals A and B, and is used by the main control processor MCPR to control the call. Although only call management information block a is shown in FIG. 2, there are usually a plurality of blocks (a predetermined number depending on the call volume) that are captured for each call that originates, and are released (“empty”) when they are no longer needed at the end of the call. ”), creating a chain of empty blocks so that they can be used for the next call control.

Therefore, if a failure occurs in the terminal A system, for example, the terminal line control processor LPR, the main control processor
The MCPR recognizes the failure of the terminal line control processor LPR and sets "failure" in the TCT of the call control information TCM of all terminals accommodated by the terminal line control processor LPR. On the other hand, in the event of a failure in terminal A, communication information identifying the failed terminal (for example, the line number of terminal A) is received from the terminal line control processor LPR, and the terminal function unit P1 of the main control processor MCPR uses the communication information to identify the failed terminal. Find A and display the call control information A-TCM status for this terminal A.
Set “failure” indication on TST. This state is shown in FIG. 3A. Terminal failure detection unit P2 is terminal A
When it is detected that the status display TST of the corresponding terminal control information A-TCM indicates "failure", it identifies the call management information block a based on the call management information CDBN,
It recognizes that the terminals related to the call are A and B, and provides terminal control information A- for terminals A and B.
Set the "initialization requesting" display to the status display TST of TCM and B-TCM, respectively. This state is shown in FIG. 3B (note that the word "request" is omitted from the figure). Next, the terminal initial setting section P3 sets the terminal A,
When it detects that the status display TST of the terminal control information A-TCM and B-TCM corresponding to B is "initialization requesting" display, a terminal initialization request is sent to the line control processor LPR that accommodates the corresponding terminals A and B. Send a message and initialize terminals A and B. After completing the initialization, display the status of the terminal control information TCM.
Set “normal” display on TST. This state is shown in FIG. 3C.

Therefore, according to the embodiment of the present invention, it is possible to detect each faulty terminal and to initialize only the faulty terminal and terminals related to the faulty terminal, without affecting the others.

In the above description, the status display TST of the terminal control information TCM is set to three states, but it is not limited to three states and can be given various states depending on the initial setting method, etc.

Furthermore, since the status of the terminal can be recognized from the status display TST of the terminal control information TCM, access to a faulty terminal can be easily prohibited. The "failure" setting of the status display TST of the terminal control information TCM is performed by the terminal control function unit P1, but without being limited to this, for example, the status display TST of the terminal control information TCM is By setting "failure" to "failure", initial settings can be made for any terminal.

(6) Effects of the invention According to the present invention, if a terminal becomes a failure, initial settings can be made only for that terminal and related terminals, so the effect on the entire system is minimized and the reliability of the system as a whole is improved. There is.

[Brief explanation of the drawing]

FIG. 1 is a system configuration diagram according to the present invention, FIG. 2 is a diagram explaining processing control of the present invention, and FIGS. 3A to 3C are diagrams showing transition states of call control in the present invention. MCPR is the main control processor, LPR is the terminal line control processor, TCM is terminal control information, TST is terminal status display, and CDBN is call management information.

Claims (1)

[Claims] 1. Dedicated processor that accommodates and controls terminal lines
LPR, a main control processor MCPR that exchanges control signals with the dedicated processor LPR, and a main memory MEM of the main control processor MCPR.
In the electronic switching system, the main control processor (MCPR) has The failure status of the terminal and the corresponding call management information block a are stored in the main memory (MEM) corresponding to the terminal line.
The main control processor MCPR, which receives a terminal failure notification from the dedicated processor LPR, uses the terminal control information TCM corresponding to the failed terminal to determine whether it is currently connected to the failed terminal. a dedicated processor LPR that extracts the location information of the terminal and controls the faulty terminal and the extracted terminal, respectively;
A faulty terminal initial setting method, characterized in that initial settings of only the faulty terminal and the extracted terminal are requested. 2 Dedicated processor that accommodates and controls terminal lines
LPR, a main control processor MCPR that exchanges control signals with the dedicated processor LPR, and a main memory MEM of the main control processor MCPR.
In the electronic switching system, the main memory of the main control processor MCPR includes a call management information block a that manages location information of a plurality of terminals forming a call being connected and the connection status of the call for each call. Device
In the MEM, terminal control information TCM consisting of terminal status display information TST indicating the failure status of the terminal and link information CDBN indicating the address of the call management information block a is provided corresponding to the terminal line, and the main control processor When the MCPR detects a failure in the dedicated processor LPR, the MCPR performs initial settings for the failure dedicated processor LPR, and sets the link information of the terminal control information TCM.
The call management information block a determined by the CDBN extracts the location information of the terminals connected to all the terminals accommodated in the failure-dedicated processor, and the terminal status of all the accommodated terminals and the extracted terminals. Displays the failure status in the display information TST, and in accordance with the displayed failure status, controls the dedicated processor LPR, which controls each of the accommodated terminals and the extracted terminals, based on the extracted location information. A failed terminal initialization method, characterized in that initialization is requested only with the extracted terminal.