WDM光网络的抗毁性路由设计  

Invulnerability routing design of WDM optical network

作　　者：李晶晶 田海丽 

机构地区：[1]郑州工商学院机械与电信工程学院

出　　处：《激光杂志》2018年第2期114-117,共4页Laser Journal

基　　金：河南省自然科学基金(No.152300410133)

摘　　要：WDM光网络是主干网络中重要的传送网,光路传输速率能够到达每秒Gbit级,而传统路由算法对于WDM光网络抗毁性设计存在缺陷,增加了网络切换和保护的代价。提出支持优先级与预留备用路由相结合的抗毁性路由算法设计,分析了光网络负载容量与路由跳数对优先级请求划分标准的影响;通过对光路连接备用路由波长数的限制,优化低级别光路建立请求的性能,并改善高级别光路备用路由和波长的可选择性;基于ILP网络保护策略实现对WDM光网络共享链路和共享通道的保护和切换,并提高了光网络路由设计的抗毁性能。仿真实验结果表明,提出的路由算法设计提高了网络资源的利用率和网络健壮性,降低了多任务请求的阻塞率。WDM optical network is the important backbone transmission network,whose light path transmission rate can reach second class. Traditional routing algorithm for WDM optical network design has flaws which increase the price of the network switch and protection. Therefore,this paper proposes an invulnerability routing algorithm design which combines priority supporting and alternative routing reserving. First analyzing the optical network load capacity and the routing hop count to the influence of the standard of priority requests; By spare the number of wavelength routing optical path connection limit,optimizing the influences of optical network load capacity and routing hops on level request. Then,limiting the wavelength amount of optical connecting alternative routing to improve the building request performance of low level optical path and improve the selectivity of high level alternative routing and wavelength. The protection and switch of WDM optical network sharing link and shared channel are realized based on the network protection policy,and the invulnerability of the optical network is improved. The simulation results show that the proposed routing algorithm is designed to improve the utilization and network robustness of network resources and reduce the blocking rate of multitask requests.

关 键 词：WDM 光网络 支持优先级 备用路由 抗毁性 

分 类 号：TN913[电子电信—通信与信息系统]