基于跨层设计的AODV路由优化机制

作者:余翔;许未;马箫雯 刊名:光通信研究 上传者:赵铁源

【摘要】以AODV(无线自组网按需平面距离矢量路由)协议为原型,针对WMN(无线Mesh网)中传统AODV协议路由判据单一从而导致路由性能较差的缺陷,采用跨层设计方法为WMN设计了一种新的IAODV(优化的AODV)协议。在路由计算过程中通过跨层操作机制提取节点当前负载和链路投递率这两个影响链路质量的因素,结合路由跳数设计出合理的路由判决函数。理论分析和NS2仿真结果证明,这种路由优化机制提高了吞吐量,降低了网络时延,并且能够达到负载均衡的路由效果。

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无线通信技术基于跨层设计的AODV路由优化机制 余 翔,许 未,马箫雯 (重庆邮电大学 通信与信息工程学院,重庆 400065) 摘要:以 AODV(无线自组网按需平面距离矢量路由)协议为原型,针对 WMN(无线 Mesh网)中传统 AODV 协议路由判据单一从而导致路由性能较差的缺陷,采用跨层设计方法为 WMN设计了一种新的IAODV(优化的 AODV)协议。在路由计算过程中通过跨层操作机制提取节点当前负载和链路投递率这两个影响链路质量的因素,结合路由跳数设计出合理的路由判决函数。理论分析和 NS2仿真结果证明,这种路由优化机制提高了吞吐量,降低了网络时延,并且能够达到负载均衡的路由效 果。 关键词:无线 Mesh网;路由协议;跨层设计;无线自组网按需平面距离矢量路由中图分类号:TP393   文献标志码: A   文章编号:1005-8788(2012)06-0060-04 Cross-layer-based AODV routing  optimization Yu Xiang,Xu Wei,Ma Xiaowen ( School of Communication and Information Engineering,Chongqing Universityof Posts and Telecommunications,Chongqing 400065,China) Abstract:On the basis of Ad hoc On-Demand Distance Vector Routing(AODV)protocol and in view of the defects of poor rou-ting performance arising from unitary routing criterion for traditional AODV Wireless Mesh Networks(WMN),this paper de-signs a novel Improved AQDV (IAODV)by employing  a cross-layer design method.Furthermore,it extracts such factors af-fecting the link quality as the current node load and link delivery rate by the cross-layer operation mechanism in the route calcu-lation process and designs a rational routing decision function in combination with the routing hops.Theoretical analysis and NS2simulation results prove that this route optimization mechanism improves the throughput,reduces the network delay and a- chieves load balanced routing. Key words:WMN;routing protocol;cross-layer design;AODV 0 引 言 WMN(无线 Mesh网)是一种新型的分布式宽带无线网络架构,能为用户提供高速率、高容量的互联网宽带无线接入[ 1]。WMN具有无中心、自组织、自适应

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