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分析了虚级联的传输延时和由LCAS协议引入的固定延时。在现有的SDH/SONET网络中,仅采用复用段保护或通道保护不能完全满足生存性的要求。基于它们各自的优点提出了组合保护的方法。通过仿真和分析,组合保护在恢复率和恢复时间上优于复用段保护和通道保护。
The transmission delay of virtual concatenation and the fixed delay introduced by LCAS are analyzed. In the existing SDH / SONET network, only the use of multiplex section protection or channel protection can not fully meet the requirements of survivability. Based on their respective merits, a method of combined protection is proposed. Through simulation and analysis, combined protection is superior to multiplex section protection and channel protection in recovery rate and recovery time.