无线网状网路由判据研究

无线网状网(WMN)相关技术的研究非常活跃,路由判据的设计是提高其性能的关键。WMN具有同时拥有移动节点和静态节点及每个节点可能配置多信道等特点。对路由判据的设计提出了特别的要求:必须保证网络的稳定性;保证最小权重路由有最佳性能;该路由可以通过多项式复杂度算法得到;得到的路由中无转发环路。研究了几种现有的路由判据,包括HOP、ETX、ETT、WC-ETT、MIC、mETX、ENT。MIC能较好适应WMN,但需要在自由因子的设定及网络中加入移动节点后的性能方面做改进。对路由判据的跨层、多准则设计是以后的研究方向,基于此文中也对几个改进方案进行分析。

Research to the Routing Metrics of Wireless Mesh Networks

Study on Wireless Mesh Networks is very active.Designing routing metrics is critical for performance in wireless mesh networks.The unique characteristics of mesh networks impose unique requirements on designing routing metrics for mesh networks.In this paper,we study several existing routing metrics,including HOP,ETX,ETT,WCETT,MIC,mETX,ENT.We think that MIC could suit WMN well but still have to do more study on setting the proper factors which cause the degree-of-freedom and have to improve its performance in the mesh networks with mobile nodes as well as static nodes.Study on the cross-layer and multi-standard metrics would be the future work,and based on which,several modified schemes would also be analyzed.