MPLS over WDM光互联网中多优先级标记交换路径路由算法研究

该文针对分层图模型的局限,设计了结点光收发器数受限的MPLS over WDM光互联网的扩展分层图.提出并研究了MPLS over WDM光互联网中具有不同QoS约束的多种优先级标记交换路径的路由算法--区分综合路由算法(Differentiating Integrated Routing Algorithm,DIRA).该算法综合考虑了对标记交换路径QoS的满足和网络资源的优化利用.与目前实用的WDM光网络路由算法的性能仿真对比表明,DIRA在提高网络总的吞吐量,降低有时延约束标记交换路径的阻塞率方面,性能更优.

The Study on Routing Algorithms of Multi-priority Label Switch Path in MPLS over WDM Mesh Networks

An extended layered graph of MPLS over WDM mesh networks is designed in this paper, which overcomes the shortcomings of original layered graph and involves the limited optical transceivers at routing nodes. Based on different QoS constraint, the priority of label switch paths is classified and the corresponding routing algorithm DIRA (Differentiating Integrated Routing Algorithm) is proposed and studied. The LSP’s QoS and optimized network resources utilization are taken into account comprehensively in DIRA. The comparison of DIRA with the representative optical routing algorithms via simulation shows that it can reduce the blocking probability of delay-constraint LSP and improve the network throughput.