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中文摘要：
为了优化利用IP层和WDM层网络资源,在WDM网络集成辅助图模型的基础上,提出了一种面向IP/GMPLS over WDM网络的基于代价的优化综合路由算法,即CIR（Cost-based Integrated Routing）。该算法将IP层和WDM层资源可用信息以代价函数形式给出,并将因网络拓扑结构和网络负载分布不均衡等产生的瓶颈链路以及带宽碎片问题也统一纳入考虑,由此将LSP建立问题转化为在集成辅助图上找出一条源、目的节点之间的最短通路问题。仿真结果表明：CIR算法有效地实现了IP和WDM两层资源的联合优化,提高了网络资源利用,降低了网络阻塞率。
英文摘要：
Based on the model of WDM integrated auxiliary graph,an integrated routing algorithm for IP/GMPLS over WDM networks,named Cost-based Integrated Routing（CIR）is proposed.The algorithm presents the resource availability of both IP and WDM layers in the form of cost functions,and uniformly considers the problems of bottleneck links and bandwidth fragments caused by the asymmetry of network topology and the unbalance of load distribution.Therefore,the LSP optimized routing can be transformed to the problem of finding the shortest path（i.e.,the minimum cost path）between source and destination nodes within the integrated auxiliary graph.The simulation result shows that CIR can not only optimize the network resource utilization to admit more LSP connection requests,but also efficiently reduce the blocking probability of networks.
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