A network protection method, network node and system

Abstract

The network protection method, network node, and communication system provided by the embodiments of the present invention obtain the communication status of the source node of the protection section when the path of the transmission service has signal degradation or signal failure, and according to the communication status of the source node, and The communication status of the local communication path determines whether to perform protection switching, which can avoid false switching to a certain extent, thereby improving the accuracy of protection switching in the communication network.

Description

technical field [0001] The invention relates to the technical field of communication, in particular to a network protection method, a network node and a communication system. Background technique [0002] The robustness of the communication network is a network characteristic that communication operators are very concerned about. In order to enhance the robustness of the communication network, communication operators often establish a backup path or backup network for the communication path or communication network during the network construction process. Business offers protection. [0003] With the rapid development of communication technology, the communication network becomes more diverse and complex. At the same time, network protection technology is also facing many new challenges. [0004] like figure 1 as shown, figure 1 A communication network is given as an example. figure 1 Among them, node A, node B, and node C are connected in sequence, among which, node A...

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Problems solved by technology

[0005] However, in the actual network operation process, the inventor found that during the protection switching process of node B, due to known or unknown reasons such as clock switching and path switching, node B could not normally send data to node C within a certain period of time. In addition, due to the difference in the length of the active and standby optical fibers, etc., it is easy for the C node to misjudge that W2 is faulty, and then perform protection switching between W2 and P2

It can be seen that in the prior art, the protection switching between nodes may sometimes be mistaken switching, and the accuracy of protection switching is relatively low

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