JPH01296790A - Software revision control system for exchange - Google Patents

Abstract

PURPOSE:To change software during on-line service even in an exchange whose main controller is not duplicated by providing a control means loading an execution program of a task to a main memory from an external storage during on-line service. CONSTITUTION:Upon the receipt of an execution program change of a task from a maintenance personnel, an execution program management task 110 loads a new execution program file of the task from a magnetic disk device 30 to an idle area on the main storage memory of a main controller 20. Then the program address loaded newly is registered to the entry corresponding to the task program table. Then in the case of starting the corresponding task, the operation is started by using the new execution program. Thus, even if the main controller 20 is not duplicated, the software is revised during the on-line service.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a software change control method for an exchange.

[Conventional technology]

Conventionally, software change control methods during online services have been provided only in exchanges with dual main control devices, and not in converters with only one main control device. In a switch with dual main controllers, first stop the operation of one of the main controllers and change the 280M, or load a new execution program from the external storage device onto the main memory and install it. After changing the main controller, restart the exchange service for that main controller, then stop the operation of the other main controller and change its software in the same way, thereby realizing the software change of the exchange during online service. Was.

[Problem to be solved by the invention]

The conventional software change i1j control method described above is applicable only to exchanges with dual main controllers, and software cannot be changed in exchanges with only one main controller without stopping the exchange service. This was a practical problem.

In addition, in exchanges with redundant main control units, during software changes, only one main control unit must perform the exchange service, and the original redundancy function cannot be achieved, which poses a problem in terms of fault countermeasures. was.

[Failure to solve the problem]

The software change control system for an exchange according to the present invention has a main control unit of an exchange that realizes an exchange service function through the mutual operation of a plurality of tasks. and a control means for switching an execution program of a certain task from an old execution program to a new execution program, and the software of the exchange wall can be modified and changed during online service.

〔Example〕

Next, the present invention will be explained with reference to the drawings.

FIG. 1 is a system configuration diagram of an embodiment of the present invention. The exchange shown here includes a communication path switch 10 and a main controller 2.
0, a magnetic disk device 30, and telephone terminals 40 and 41.

FIG. 2 is a software configuration diagram of a portion of the internal software of the main controller 20 in FIG. 1 that is related to the present invention. Real-time operating system 100 original execution program management task 11O2 terminal control task 120. Connection control task 130 and maintenance management task 14
0 is working. Additionally, there is a disk file input/output function 150 for accessing files on the disk as a common function that can be used from each task. The execution program management task 110 loads the execution program from the disk onto the main memory and manages the task program table. The terminal control task 120 controls the telephone terminal. The connection control task 130 controls communication path switches and performs connection processing between terminals. The terminal control task 120 and the connection control task 130 cooperate to realize an exchange service, and it is also possible to provide a plurality of task entities for each task to perform multitasking. The maintenance management task 140 controls the registration and reading of station data.

FIG. 3 shows the structure of the task program table on the main memory of the main controller 20. Each task has a task program number 0 to 3 depending on its type.
is assigned, and the address of the execution program corresponding to the task program number is registered in the task program table.

1. In the above configuration, execution program management task 1
10 receives a request from a maintenance person to change the execution program of a certain task, and loads a new execution program file for that task from the magnetic disk device 3° into an empty area on the main memory of the main controller 20. Then, the newly loaded program address is registered in the corresponding entry in the task log 2 staff. Thereafter, when the corresponding task is activated, the new execution program is used to start the operation.

〔Effect of the invention〕

As explained above, according to the present invention, by realizing the function of changing the execution program of a certain task in the main control unit during the online service of the exchange, online service can be provided even in the exchange where the main control unit is not duplicated. It is now possible to change the software during the process, and there is no need to stop the service to change the software. Furthermore, in exchanges where the main controller is duplexed, the software can be changed while the duplexing function remains intact during online service.

[Brief explanation of the drawing]

Figure 1 is a system configuration diagram of an embodiment of the present invention, Figure 2 is a software configuration diagram inside the main controller in Figure 1, and Figure 3 is a task program table on the main memory of the main controller. FIG. 10... Communication path switch, 2o... Main controller, 3o... Magnetic disk device, 40,
41°...°°°Telephone terminal, 100... Real-time operating system, l 10-°-
Execution program management task, 120...Terminal control task, 130...Connection control task, 140
...Maintenance management task, 150...Disk file input/output function. Figure 1 Figure 2 Main 1 piece 1L meso Figure 3

Claims (1)

[Claims] A main controller of an exchange that realizes an exchange service function through mutual operation of a plurality of tasks includes a control means for loading a task execution program from an external storage device into the main memory during online service of the exchange, and an execution program for a certain task. and a control means for switching from an old execution program to a new execution program, and the software of the exchange can be modified and changed during online service.