摘要
在分析无线Mesh网路由协议所面临挑战的基础上,结合无线Mesh网络的性能要求,以优化链路状态路由(OLSR)协议为原型,采用跨层设计理论,提出了一种基于链路状态良好程度的路由协议LR-OLSR。该协议引入了认知无线网络中的环境感知推理思想,通过对节点负载、链路投递率和链路可用性等信息进行感知,并以此为依据对链路质量进行推理,获得网络中源节点和目的节点对之间各路径状态良好程度的评价,将其作为路由选择的依据,实现对路由的优化选择,提高网络的吞吐量,达到负载均衡。通过与OLSR及其典型改进协议P-OLSR、SC-OLSR的对比仿真结果表明,LR-OLSR能够提高网络中分组的递交率,降低平均端到端时延,在一定程度上达到负载均衡。
Based on the analysis of the most important challenges in Wireless Mesh Network （WMN）, a routing protocol named LR-OLSR was proposed based on the Optimized Link State Routing （OLSR） protocol with cross-layer design theory. The LR-OLSR protocol greatly optimized routing performance by introducing the reasoning method to value the link quality depending on information such as the node load, the packet delivery ratio, and the link availability. The proposed protocol made use of link quality as the routing metric during route selection, and thus could achieve optimal routing and load balancing in WMN. The simulation results on LR-OLSR, OLSR and its typical improvement named P-OLSR and SC-OLSR show that the proposed routing protocol improves the packet delivery ratio, reduces the end-to-end delay, and achieves load balance in the route selection process.
出处
《计算机应用》
CSCD
北大核心
2010年第10期2636-2640,共5页
journal of Computer Applications
基金
信息产业部电子生产发展基金资助项目(H04010601W060679)
四川省科技支撑计划资助项目(2010GZ0095)
四川省软科学计划资助项目(08RKX0079
07ZR0023)
关键词
无线MESH网
优化链路状态路由
路由协议
表驱动路由
链路认知
Wireless Mesh Network （WMN）
Optimized Link State Routing （OLSR）
routing protocol
table-driven routing
link state reasoning
