IP/MPLS over WDM网中的动态选路和波长分配算法  

DYNAMIC ROUTING AND WAVELENGTH ASSIGNMENT ALGORITHMS IN IP/MPLS OVER WDM NETWORKS

作　　者：何荣希[1] 张治中[1] 王光兴[2] 李乐民[1] 王晟[1] 

机构地区：[1]电子科技大学宽带光纤传输与通信系统技术国家重点实验室,成都610054 [2]东北大学信息科学与工程学院网络与通信中心,沈阳110004

出　　处：《电子与信息学报》2003年第8期1081-1087,共7页Journal of Electronics & Information Technology

基　　金：国家自然科学基金(基金号:69990540;60002004)

摘　　要：该文研究了IP/MPLS over WDM网中,利用综合路由法为到达的业务流建立标签交换路径(LSP)时,如何选择是在WDM层为它新建一条光路,还是利用现有的逻辑IP链路来满足其要求,提出一种带宽碎片消除的策略,该策略在决定是否利用逻辑IP链路来建立LSP时,总是尽量减少造成带宽碎片,从而可以有效提高全网的资源利用率,仿真结果表明带宽碎片消除策略可以进一步改善综合路由算法的性能。One of the key issues in integrated dynamic IP and wavelength routing algorithm is how to determine whether it is better to route an arriving Label Switch Path (LSP) establishment request over the existing topology or to open new wavelength paths. A new scheme, Bandwidth Defragment Method (BDM), is presented in this paper. It makes full use of the statistic information of the networking link-state and resource availability to determine how to route an arriving LSP request. The integrated dynamic Routing and Wavelength Assignment (RWA) algorithm based on BDM can reduce the numbers of bandwidth fragment and increase the utility of network resource. Simulation results show that the scheme can improve the performance of the network significantly.

关 键 词：IP/MPLSoverWDM网 动态选路 波长分配算法 通用多协议标签交换 带宽碎片消除 波分复用 

分 类 号：TN929.1[电子电信—通信与信息系统]