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研究了WDM光网中的链路保护问题 提出了一种新的共享链路保护策略———基于SRLG的共享链路保护策略 (SRLG SLP) SRLG(共享风险链路组 )定义了对一条工作光通道分配保护资源时的资源可用性的约束 它规定任意两条有着同样故障风险或者说处于同一个SRLG的工作光通道不能利用同样的保护资源 另外 ,还提出了一种更加符合实际的单链路故障模型 ,其中链路故障间隔时间和链路故障保持时间被考虑作为两个独立的变量 基于该链路故障模型 ,通过大量的仿真试验 ,比较了专用链路保护 (DLP)、共享链路保护 (SLP)和提出的SRLG SLP保护策略的资源利用率、保护效率以及业务中断率 结果显示 ,我们提出的SRLG SLP在保护效率和业务中断率方面的保护性能远好于DLP和SLP ,但会牺牲一些资源利用率
This paper studies the link protection problem in WDM optical network and proposes a new shared link protection strategy - SRLG-based shared link protection strategy (SRLG SLP) SRLG (shared risk link group) Optical Channel Allocation Resource Availability Constraints for Resource Protection It specifies that any two working optical channels that have the same failure risk or are in the same SRLG can not utilize the same protection resources. In addition, a more realistic single-link Fault model in which the link failure interval and the link failure hold time are considered as two independent variables based on the link failure model. Through a large number of simulation tests, the DLP, the shared link protection (SLP) and proposed SRLG SLP protection strategy The results of resource utilization, protection efficiency and service interruption rate show that the SRLG SLP we proposed has far better protection performance in protection efficiency and service interruption rate than DLP and SLP but sacrifices Some resource utilization