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针对通过用多协议标签交换(GMPLS)光网络中工作光路出现故障时保护光路的激活过程可能导致较长的故障恢复时间,成为限制应用的一个关键因素。本文从信令机制的角度研究缩短故障恢复时间的方法,扩展了现有的GMPSL信令协议,提出了一种保护光路的快速双向激活信令机制,分别从首尾两个方向同时激活一条保护光路,从而缩短了故障恢复时间。与现有的单向机制相比,双向机制减少了保护倒换过程中超过40%的告警激活时间,且在激活过程中需要更少的信息消息数,可以降低网络故障时控制平面的负载。
The key to limiting applications is the activation process that protects the optical path when a working optical path in a multi-protocol label switched (GMPLS) optical network fails, which can result in longer failover times. This paper studies the method to shorten the fault recovery time from the aspect of signaling mechanism and extends the existing GMPSL signaling protocol. A fast two-way activation signaling mechanism for optical path protection is proposed, which activates a protection optical path , Thus shortening the fault recovery time. Compared with existing unidirectional mechanisms, the bidirectional mechanism reduces alarm activation time by more than 40% in the protection switching process and requires less information and messages during activation to reduce the load on the control plane in case of network failure.