Method, system and control device for protecting multi-section cascade transmission network

Abstract

The invention relates to a protection method, a system and a protection control device for a multi-section cascaded transmission network. The method comprises the following steps: detecting the signals of the working path and the protected path in each section; when detecting that the working path and the protected path of the first-level section loss the signals at the same time or successively within a first preset time period, maintaining the states of the working path and the protected path of the first-level section before the business-side fault is cleared; when detecting that the working path and the protected path of each section posterior to the first-level section loss the signals at the same time or successively within a second preset time period, maintaining the states of the working path and the protected path of the section within a preset switch lag time period. The protection method, system and device solve the problem that the failure of a certain upstream section in the prior network results in the random, out-of-order and frequently-switched misoperation of several downstream sections, ensure stable business on the original path when the downstream sections are normal, avoid the incorrect switching and the incorrect alarm report, facilitate the network operation maintenance, and achieve the effect of rapid fault location.

Description

technical field [0001] The invention relates to a protection method for a multi-section cascaded transmission network, in particular to a method for avoiding frequent switching of the downstream section due to the switching of the upstream section when there is no failure in the downstream section in the multi-section cascading network structure, Thereby stabilizing the method on the original path; the present invention also relates to a protection control device, especially a protection device that avoids frequent switching of services and ensures the stability of transmission; the present invention also relates to a multi-section transmission network protection system , especially a system for ensuring stable transmission in a transmission network and avoiding frequent switching of services, belonging to the technical field of communications. Background technique [0002] The IP-based business has led to major changes in the structure, function, and business composition of...

AI Technical Summary

Problems solved by technology

[0011] The first purpose of the present invention is to provide a multi-section cascaded transmission network protection method, which is used to solve the problem that a fault occurs in a certain upstream section in the existing multi-section cascaded transmission network. It may lead to multiple switching errors in multiple downstream sections, and whether the switching is a random phenomenon, so that when there is no failure in the downstream section, frequent switching of services and wrong fault alarms are avoided, and the business is stable on the original path; ensuring transmission Stability, easy network operation and maintenance, quick fault location

[0012] The second object of the present invention is to provide a protection control device, which is used to solve the misoperation and false alarm reporting that may trigger switching when the existing protection control unit does not fail in this road section, so as to realize that there is no fault in the protected road section. In case of failure, avoid frequent switching of services, stabilize on the original path, and realize rapid fault location

[0013] The third object of the present invention is to provide a multi-section cascaded transmission network protection system, which is used to solve the problem that a failure of a certain section in the existing multi-section cascaded transmission network structure may lead to failures in downstream multiple The faulty operation of multiple switching of a section, and whether the switching is a random phenomenon, realizes that when there is no failure in the middle and downstream sections of the transmission network system, frequent switching of services is avoided, and the service is stable on the original path; ensuring the stability of transmission and facilitating the network Operation and maintenance, quick fault location

Images