Multilayer protection switching method and device in optical network

Abstract

The invention discloses a multilayer protection switching method and device in an optical network. The multilayer protection switching method comprises the following steps: whether a client layer and a service layer fail is judged; when detecting that only the client layer fails, a client layer APS process starts and executes bridging after the operation is completed; when detecting that the service layer or the client layer and the service layer fail(s), the APS processes of the client layer and the service layer start simultaneously, and after the operation is completed, the APS process of the client layer is in a hold mode, and does not execute the bridging operation; the state of a protection switching state indicator is detected, and if the protection switching state indicator shows that the bridging of the service layer is successful, the APS process of the client layer is zeroed; and if the bridging of the service layer fails, the client layer executes bridging immediately. The method and device have the advantages that by the protection switching state indicator of the service layer, the protection switching actions of the client layer and the service layer are coordinated, and the parallel working of the protection switching processes of the client layer and the service layer is realized, so that the protection switching time is shortened.

Description

technical field [0001] The invention relates to an optical network protection switching technology, in particular to a multi-layer protection switching method and device in an optical network. Background technique [0002] With the strengthening of the trend of network convergence, equipment that integrates packet, ODUk, and optical crossover technologies has begun to appear. This equipment supports packet switching, optical channel data unit (ODUk) crossover, and optical channel layer (OCH) The flexibility of the device to process small-grained services and the high bandwidth of the transmission device to transmit large-grained services reduce network investment and operating costs. [0003] In an optical network, in order to ensure that services are not affected, when a network problem occurs, the protection switching time is required to be within 50ms. In a multi-technology fusion equipment and established network, the packet layer, ODUk layer, and OCH layer can all perf...

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is to solve the problem that the multi-layer protection switching coordination in the optical network makes the service damage time exceed 50ms

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