Intermediate node, cascade protection system and cascade protection method

Abstract

The embodiment of the invention belongs to the technical field of communication and discloses an intermediate node, a cascade protection system and a cascade protection method. The intermediate node is connected with a first node through a first working channel and a first protection channel, and connected with a second node through a second working channel and a second protection channel. The cascade protection system comprises a receiving unit and a processing unit, wherein the receiving unit is used for receiving and then outputting a first signal of the first working channel and a second signal of the first protection channel, and receiving and then outputting a first monitoring message corresponding to the first signal and a second monitoring message corresponding to the second signal; the processing unit is used for judging whether the first signal and the second signal are normal according to the first monitoring message and the second monitoring message output by the receiving unit; and if the first signal and the second signal are judged to be normal, the first signal is output to the second working channel, and the second signal is output to the second protection channel. The intermediate node, the cascade protection system and the cascade protection method can shorten the switching time of services during a single-point fault.

Description

technical field [0001] The invention relates to the field of network management, in particular to an intermediate node, a cascade protection system and a cascade protection method. Background technique [0002] Due to man-made or natural reasons, communication optical cables are often blocked. The current fiercely competitive communication market requires communication operators to ensure unimpeded customer communication, and communication services have higher and higher requirements for recovery time after business interruption. SNCP (Sub-network Connection Protection, sub-network connection protection) was developed under this background. SNCP is a dedicated protection mechanism, used to protect the protection class of some paths in one or more operator networks, and can support cascaded protection subnets, which is an important protection type in the transport network. [0003] According to the implementation of SF (Signal Failure, signal failure) / SD (Signal Degrade, sig...

AI Technical Summary

Problems solved by technology

As a result, one fault triggered three switching operations, making the switching time longer and unable to meet customer needs

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