光网络中基于路径计算单元的路由机制研究

Research on routing mechanism based on the path computation element in optical networks

针对大规模多层多域光网络群故障发生时的网络受损情况,提出基于路径计算单元(PCE)架构的跨域路由算法进行快速恢复,并基于OMNet平台对多层多域路由方案进行了性能仿真分析。结果表明,基于PCE架构的路由策略在群故障发生时能够大大减少网络中的路径计算请求泛洪信息,降低路由计算收敛时间,可以提高全网剩余资源的资源利用率,为业务的快速恢复提供了路由基础。

Against to the network damage due to the group-failure in large-scale multi-layer multi-domain optical networks,the cross-domain routing algorithm based on path computation element（PCE） structure is proposed as the survivability mechanism.The simulation on OMNet software platform is taken to verify its validity.The results show that the PCE-based routing mechanism can decrease the routing calculation requirement flooding information and reduce the routing calculation convergence time when the group-failure happens,and the mechanism can also improve the resource utilization of remaining network resource.