KR100355039B1 - Method of controlling dual change in an Exchanger - Google Patents

Abstract

According to the present invention, when a redundant switching is performed to replace a software version of a processor of a redundant design, a predetermined delay time is assumed so that new and old versions of software are not mixed, so that a stable redundant switching is executed. The present invention relates to a control method of redundant switching of an exchanger.

According to the present invention, the transfer command for the redundant processor from the operator is transmitted to each MP (Main Processor) -ACT that is currently active, and the redundant transfer command is transferred from each MP in the activated state to the MP in the standby state. The processor is switched from the active MP to the standby MP after the redundant switching is delayed for a predetermined time from the time of the transfer of the redundant switching command, and the user is passed from the delay time after the execution of the processor switching. By allowing the block to be driven, a stable processor is replaced without mixing new and old versions of the software.

Description

Method of controlling dual change in exchange

The present invention relates to a redundant switching control method of an exchange. More particularly, the redundant switching control of the exchange to prevent the version conflict failure of the software when replacing the version of the software by the switching of the redundant structure applied to the exchange. It is about a method.

As is well known, the electronic exchange is designed to relay (or exchange) voice and / or text data to provide various types of exchange service functions for wired / wireless analog / digital subscribers.

Fig. 1 is a block diagram showing a basic outline of the electronic exchange, in which the electronic exchange shown in the figure is called lines or other stations for receiving analog subscriber terminals at its input side. (ASS) Access Switching Subsystem (ASS) 10a to 10n performing a function of distributed call processing, including a line for relaying (iii) and a line for receiving an optical subscriber terminal (optical subscriber lines); An INS (Interconnection Network Subystem) 20 which performs a routing function of centralized call processing while an optical link is employed as a transmission medium for the ASS 10a to 10n; It will include a Central Control Subsystem (CCS) 30 that is responsible for the overall operation and maintenance of the corresponding exchange.

The processor provided in the exchanger consisting of the ASSs 10a to 10n, the INS 20, and the CCS 30 shown in FIG. 1 is usually a main processor (MP) 40 and a lower processor which perform a high level control function. It is divided into sub-processors (PP) 42a to 42c that perform a level control function.

The MP 40 controls the lower PPs 42a to 42c while performing the upper function and the overall operation and maintenance function of the corresponding exchange during the call processing process, and the PPs 42a to 42c are variously controlled. The devices 44a to 44c are controlled to perform tasks requiring real-time processing, and under the control of the MP 40, the lower functions and the maintenance functions of the devices 44a to 44c are handled during the call processing process.

Preferably, the entire processor used in the exchange is designed and operated as a redundant structure to ensure reliability. In practice, the processor of the redundant structure is a processor on one side of the processor when the processor on the other side is active (ACT). It remains in the state STAND-BY; SBY.

For such a redundant structure, it is necessary to upgrade the version of the software in operation of the exchange. FIG. 3 is a diagram illustrating a process of replacing software in the redundant structure designed for the electronic exchange shown in FIG.

That is, 100 in FIG. 3 is an operator (ie, operator terminal) for relatively remote management of the corresponding exchange.

In FIG. 3, 200 is a Human-Machine Interface (HMI) that is responsible for interfacing the INS 20 and the CCS 30 and the operator 100 including the MP 40 and the PPs 42a to 42c.

In addition, the CCS 30 is provided with an OMP (Operation Maintenance Processor) -ACT (300a) and OMP-SBY (300b) designed in a redundant structure, the OMP (300a; 300b) is network management, billing, statistical database management Operation functions such as; Maintenance functions such as state management, fault management, and test management of the corresponding exchange; It is responsible for the communication function between the operator 100 and the switching center, and for such function is to match the input / output devices and various auxiliary storage devices.

Here, the version replacement process of the software executed by the operator 100 will be described with reference to the duplex structure shown in FIG. 3.

Currently, the OMP-ACT 300a is applied to the execution of various functions given to the corresponding exchange, and when the software needs to be replaced, the operator 100 passes the OMP-ACT 300a via the HMI 200. The switch of the redundant structure is notified to the SSL (Space Switch Link) 302 (see S1 and S2 in FIG. 3).

Then, the SSL 302 transmits a redundant transfer command to the PL (Program Loader) 402 of the MP-ACT 400a provided in the INS 20 (for example, in the case of the OMP, the process is performed). Omitted) (see S3 in FIG. 3).

Therefore, in the case of the OMP, the SSL 302 of the OMP-ACT 300a, which is currently activated, transfers the transfer command to the CROS (Concurrent Real-time Operating System) 304 (see S4 of FIG. 3). Accordingly, the CROS 304 transmits the transfer command to the CROS 306 side of the OMP-SBY 300b in the standby state in S5 of FIG. 3, and the CROS 306 is operated by the operator 100. In the state where the delivered software is replaced, the subscriber layer (ie, Appl) 308 corresponding to the devices 44a to 44c and 44 is driven based on the replaced software (S6 in FIG. 3).

Similarly, when the PL 402 of the MP-ACT 400a receives the redundant transfer command in S3 of FIG. 3, the PL 402 transfers the transfer command to the corresponding CROS 404 (S7 of FIG. 3). Accordingly, the CROS 404 transmits the transfer command to the CROS 406 of the MP-SBY 400b in standby state at S8 of FIG. 3.

Accordingly, the CROS 404 also drives the subscriber layer (Appl) 408 based on the replaced software while the software is replaced in the same manner as the OMPs 400a and 400b (Fig. 3). S9).

However, in the redundant switching process of the exchange according to the conventional example shown in FIG. 3, the redundant switching is performed according to its own judgment for each MP, and the driving of the subscriber layer is performed immediately after the switching is performed. In the redundancy process, there is a high possibility of time delay between processors, resulting in a mix of new and old versions of the software.

In such a case, the possibility of damage to the system memory or disk data is increased due to the exchange of interprocessor communication (IPC) and / or access to a database (D / B) related to interprocessor communication using different data structures. do.

Accordingly, the present invention has been made in view of the above-described circumstances of the prior art, in which a new / old version of the software is mixed by allowing the switching to the redundant structure employed in the exchanger to be executed in a state where temporal matching is secured between processors. It is an object of the present invention to provide a control method of redundant switching of an exchanger to prevent the failure.

In order to achieve the above object, according to a preferred embodiment of the present invention, in a switch having a redundant processor, a method of performing a redundant switching of the processor, wherein the processor redundant switching instruction from an operator is currently activated. It is delivered to each MP (Main Processor) -ACT, and the duplication transfer command is transferred from each MP in the active state to the standby MP, and the duplication transfer is delayed for a predetermined time from the point of time of the transfer transfer command. The processor switching from the active MP to the standby MP is executed, and the redundant switching control method of the exchange is provided so that the user block is driven while the processor is switched.

According to the present invention, the user block is driven at the time when the delay time elapses after the execution of the processor switching.

According to the redundant switching control method of the switch according to the present invention having the above-described configuration, in the case of replacing the software version of the processor designed in the redundant structure, a predetermined delay time has elapsed from the time when the processor transfer command is transmitted, This ensures that the new and old versions of the program are mixed, which results in stable redundancy.

1 is a block diagram showing a basic outline of a general electronic exchange;

2 is a schematic diagram illustrating the basic structure of a control system applied to the electronic exchange shown in FIG. 1;

3 is a view for explaining a switching process of the redundant structure designed in the electronic exchange shown in FIG.

Figure 4 is a block diagram for implementing a redundant switching control method of the exchange according to a preferred embodiment of the present invention,

5 is a flowchart for explaining a redundant switching control method of the exchange according to the present invention.

* Description of the symbols for the main parts of the drawings *

10a-10n: ASS, 20: INS,

30: CCS, 40: main processor (MP),

42a to 42c: subprocessor (PP), 44a to 44c: device,

100: operator, 200: human-machine interface (HMI).

Hereinafter, with reference to the accompanying drawings, the present invention will be described in detail.

4 is a block diagram of a redundant switching control method of the exchanger according to a preferred embodiment of the present invention.

According to the present invention, when the redundant transfer command from the operator 100 is transmitted to the SSL 502 provided in the OMP-ACT 500a of the CCS 30 via, for example, the HMI 200, the OMP-ACT The transfer from 500a to OMP-SBY 500b and, for example, the transfer of INS 20 from MP-ACT 600a to MP-SBY 600b are performed in a timely matched state, and thus the processor Even when the delay time is applied differently, the optimized redundancy is achieved and the software version is replaced.

Such a process will be described in detail with reference to the flowchart shown in FIG.

First, when a duplication transfer command is transmitted from the operator 100 to the SSL 502 of the OMP-ACT 500a through the HMI 200 (S10, S11) (step 700 of FIG. 5), the SSL 502 ) Transfers a redundant transfer command to the PL 602 of each MP (eg, the MP-ACT 600a of the INS 20) (step 702 of FIG. 5).

The SSL 502 transfers a transfer command to the PL 504 of the OMP-SBY 500b of the transfer target (S13), while the PL 602 of the MP-ACT 600a transfers the MP-SBY of the transfer target. The transfer command is transmitted to the PL 604 of 600b (S18) (step 704 of FIG. 5).

According to the present invention, a predetermined delay time is set in the state where the transfer command is transmitted, thereby providing a margin for taking appropriate follow-up measures after receiving the transfer command on the MP side in the standby state.

Therefore, if a predetermined time elapses after the transfer command is transmitted (YES in step 706 of FIG. 7), duplication transfer is performed (step 708 of FIG. 7), and the duplication transfer process receives the transfer command. In the standby state, the timer signal is set and the IPC address is periodically checked to confirm the point of change to the active state.

Then, the SSL 502 transfers the processor transfer request from the corresponding CROS 508 to the CROS 508 of the OMP-SBY 500b (S14, S15), and the CROS (of the MP-ACT 600a). 606 also transmits a processor transfer request to CROS 608 of MP-SBY 600b (S19, S20).

Therefore, the CROS 506 of the OMP-ACT 500a and the CROS 508 of the OMP-SBY 500b, and the CROS 606 and MP-SBY 600b of the MP-ACT 600a. The CROS 608 performs the switching of the processor while exchanging information (step 708 of FIG. 7).

When the transfer is completed by the above process (YES in step 710 of FIG. 7), the PL 504 of the OMP-SBY 500b and the PL 604 of the MP-SBY 600b in the standby state are IPC. While checking the address, the completion state of the processor switching is detected (S16, S21), and accordingly, the PL (504, 604) is a user block (Appl) as a subscriber layer when a predetermined delay time elapses so that the entire processor is switched. ) Is driven (S17, S20) (step 712 in FIG. 7).

As described above, according to the redundant switching control method of the switch according to the present invention to compensate for the time difference between the switching between processors by including a predetermined delay time at the time of the switching in the redundant structure of the processor that needs to replace the software version By enabling the user block to be driven after a predetermined delay time even in the state of actual switching, the state in which the old and new versions of software are mixed when switching between the redundant processors is eliminated and a more stable redundant switching is achieved. It is guaranteed.

Claims (2)

In the redundant switching control method of the exchange for replacing the software version for the processor of the exchange designed in a redundant structure, The processor is transferred by the operator to each MP (Main Processor) -ACT that is currently active, The duplication transfer command is transmitted from each MP in the activated state to the MP in the standby state. After the redundancy switching is delayed for a predetermined time from the point of time when the redundancy switching command is transmitted, processor switching is performed from the activated MP to the standby MP. Redundancy switching control method of the switch characterized in that the drive of the user block is made in the state of the switching of the processor. 2. The method of claim 1, wherein the user block is driven at a time elapsed after the execution of the processor switching.