基于负载均衡和服务分级的光网络波长路由算法  

, Optical network wave-length road from calculate way based on load-balance and service lever

作　　者：程亚锋[1] 沈建华[1] 绍钟浩[1] 

机构地区：[1]南京邮电大学通信与信息工程学院

出　　处：《网络电信》2006年第12期63-67,共5页Network Telecom

摘　　要：WDM光网络中的路由和波长分配问题，常常被拆分成路由选择和波长分配两个字问题来加以解决。然而对于路由的选择问题，有很多种选路算法和实现方法，而且对于链路故障也有不同的处理方法。文章首先对光网络的保护和恢复进行了讨论，然后对服务分级和负载均衡两个问题进行了研究，最后给出了静态和动态以及链路故障的保护和恢复的网络仿真模型和工作流程。不同的网络目标有不同的设计思路和实现方法，使用负载均衡和服务分级的思想，可以使网络有较高的资源利用率和较低的链路拥塞率，而且针对不同级别的业务进行相应级别的保护和恢复策略是一种更为合理的服务方式。Abstract The problem of routing and wavelength assignment （RWA） in the WDM optical network is typically partitioned into two sub-problems： the routing sub-problem and the wavelength assignment sub-problem. For routing sub-problem, there are many approaches to the routing and carrying out, And there are also many methods to the link-failure. First the study talks about the protection and restoration in the optical network, then studies the service level and the load-balance, at last puts forward the simulation models and the flow charts for the static RWA, dynamic RWA and the protection/restoration methods to the link-failure. Different demands have the different ideas and approaches. Using the load-balance and service level leads to the higher utilizing of the resources and the less link-congestion. And the study considers that the assignment of the protection and restoration level according to deferent requirements is a more reasonable service approach.

关 键 词：光网络 生存性 服务等级 负载均衡 路由与波长分配 

分 类 号：TN929.1[电子电信—通信与信息系统]