多层生存性网络层间协调机制建模及实验评估  

Modeling and experimental evaluation of inter-layer coordination for multilayer survivable networks

作　　者：李燕伟[1] 华楠[1] 陈悦[1] 李艳和[1] 刘志刚 曹毅宁 郑小平[1] 

机构地区：[1]清华大学电子工程系,北京100084 [2]中国电子设备系统工程公司研究所,北京100039

出　　处：《清华大学学报（自然科学版）》2013年第3期399-403,共5页Journal of Tsinghua University(Science and Technology)

基　　金：国家"九七三"重点基础研究项目(2010CB328203)

摘　　要：随着网络传输能力的提升,网络故障的危害日益突出。对于多层网络来说,只采用单层的生存性策略可能会导致资源竞争的剧烈化和业务的过保护,这就需要对多层网络的生存性策略进行层间协调。该文研究了IP-WDM(wavelength division multiplexing)两层网络中的生存性问题,通过对网络中的拓扑进行重构,使得两层的问题转化为单层的问题,提出了两层网络的层间协调机制策略,并通过在硬件模拟平台进行数据传输和故障模拟对策略的有效性进行了验证。实验结果表明:采用层间协调机制后,发生故障时,业务传输能够获得更好的恢复效果,网络的生存性得到了提升。With increasing network transmission capacities, a single fiber failure may lead to disastrous data losses. In multilayer networks, single layer transmission methods will lead to confused situations in both layers without an interlayer coordination mechanism, which will hurt survivability. This study analyzes the survivability scheme of IP over wavelength division multiplexing （WDM） networks and introduces an extended topology with network resources in both the top and bottom layers. An efficient inter-layer coordination scheme is given for multilayer survivable networks with the performance evaluated for data transfer with a simulated failure on a two layer network testbed. The results show that the coordination mechanism achieves better data transfer security when failures occur and enhances the network survivability.

关 键 词：光纤通信 光网络 多层网络 网络生存性 层间协调机制 实验评估 

分 类 号：TN929.11[电子电信—通信与信息系统]