Device and method for implementing protection switching control

Abstract

A device and method for realizing the protection of reversing control is applied by using logic cruising module to replace CPU handling circuit plate like inspecting comparison job. The cruising circuit board comprises two parts, a reading value and a comparison. For CPU, the reading value is rather simple, with one value taking one to two clock cycle of the CPU. The emphasis is that when cruise the chip register, handling the comparison job of the register to cruise module, with greatly reduced CPU cruise comparison time, with the CPU having more time to handle other normal communication issues to improve the normal communication speed of the CPU. Due to the quick logical cruise inspection speed and quick issue feedback and submission, it can quickly react to the failure and make corresponding treatment, quickly maintaining equipment unit protection reverse, greatly reducing operation loss, preventing the interruption of the communication.

Description

technical field [0001] The invention relates to the technical field of communication, in particular to a device and method for realizing protection switching control. Background technique [0002] In communication equipment, in order not to affect the normal progress of communication when a certain part of the equipment is damaged or fails, many backup protection measures are often set up in communication equipment, and backups are often made for units such as cross-connect, clock, and master control. These units are redundant units and do not work normally. When the protected unit fails, these units will replace the protected unit to work normally. If a component unit fails, the upper-level control system will promptly use the backup unit to perform unit switching protection processing to ensure that the business will not be damaged or interrupted, and the communication can proceed normally. [0003] In order to accurately locate the point of failure, the upper control sys...

AI Technical Summary

Problems solved by technology

These access protocols must be carried out through communication protocols, and the procedures are cumbersome

At the same time, the communication results also need a communication protocol to be reported from the inspection CPU to the main CPU, which further increases the complexity of the software and the workload of software development.

[0011] At the same time, because the communication protocol is usually relatively slow, it will affect the speed of fault reporting, so that the response of the main CPU to the fault is slowed down, and there is a switch of access to the service chip, which undoubtedly slows down the normal access of the CPU to the chip. Slow down the CPU's normal control over business chips

The CPU must also be supported by its small system peripheral devices, such as crystal oscillator, watchdog, memory, FLASH, etc., which will undoubtedly increase the cost

And there is an extra CPU and its peripheral devices, which occupy the PCB area and increase the size of the equipment.

[0012] Moreover, according to the standard, the fault detection time should be completed within 10ms, and in a general real-time system, a task scheduling time slice of the CPU is 10ms, which determines that it is impossible to complete the fault detection within 10ms by using software polling. Therefore, neither of the above two schemes can meet the requirements of the standard.

Especially when the number of product registers reaches thousands, polling and detection by the CPU cannot be processed in time.

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