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讨论了 WDM(wavelength- division multiplexing,WDM)光传送网的快速恢复问题 ,分析了保障 Qo S的意义和在恢复路由搜索中的关键技术。针对 WDM光传送网的特点 ,提出了多业务传输条件下恢复路由优化的设计思路 ,同时采用基于遗传算法的快速搜索启发式算法解决了多约束多目标优化的问题。通过对美国和意大利两个国家级干线光网实例的计算以及与 Dijkstra算法的比较 ,验证了该算法能够在链路节点故障情况下为受损业务求取多个最优恢复路由的优势
This paper discusses the problem of fast recovery of WDM optical transport network and analyzes the significance of guaranteeing Qo S and the key technologies in the restoration of route search. Aiming at the characteristics of WDM optical transport network, a design idea for route restoration in multi-service transmission is proposed. At the same time, a fast search heuristic algorithm based on genetic algorithm is used to solve the problem of multi-constraint multi-objective optimization. Through the calculation of two national trunk optical networks in the United States and Italy and the comparison with Dijkstra’s algorithm, it is verified that the algorithm can obtain the advantages of multiple optimal recovery routes for damaged services in the case of link node failure