NETWORK PROTECTION METHOD, NETWORK NODE AND SYSTEM

摘要

By the network protection method, network node and communication system provided in embodiments of the present invention, the communication state of the source node of a local protection section is obtained when signal degradation or signal failure occurs to a path of transmission service, and whether to perform protection switching is determined according to the communication state of the source node and the communication state of the local communication path. The incorrect switching can be avoided to a certain extent, thus improving the accuracy of protection switching of communication networks.