MPLS网络中保证服务质量的多径路由选择策略

本文提出了一种在多协议标签交换(MPLS, Multiple Protocol Label Switching) 网络中保证服务质量 (QoS,Quality-of-Service) 的多径路由选择策略,其核心思想是引入多路径分散业务量机制,在保证用户服务质量要求的同时达到增加网络呼叫接受率和平衡网络负载的目的.文中着重讨论了用户端对端服务质量要求的多路分解和分配问题,在此基础上提出了多径路由的分支路径选择策略,并研究了策略中的关键参数K对该策略性能的影响.数值结果显示出多路径分散业务量在网络负载均衡方面的重要意义,并且表明用户的要求相对网络资源越高使用多径传输的优势越明显.

A QoS-Guaranteed Multipath Routing Policy for MPLS Networks

In this paper, we propose a QoS(Quality-of-Service)-guaranteed multipath routing policy in MPLS(Multiple protocol label Switching) networks. The key idea is traffic dispersion throughout the network, so that the load of the network can be balanced and call admission ratio is increased while user-required QoS being guaranteed. We first discuss the decomposition and allocation issues of end-to-end QoS constraints on paths. Based on these analyses, we present the traffic dispersion path selection strategy used by multipath routing,and also investigate the critical parameter K's effect on the performance of above path selection strategy. Numerical results show the effectiveness of multipath routing in traffic dispersion, load balancing, and call-admission-ratio improvement. We also conclude that the advantage of using multipath routing becomes more obvious as the users' requests for network resources get stricter.