基于ETX链路质量的方向贪婪转发地理路由  

ETX-based link quality directional greedy forwarding geographic routing

作　　者：孙伟[1] 安进[1] 房亚群[1] SUN Wei AN Jin FANG Ya-qun(Department of Information Engineering, Jiangsu Food and Pharmaceutical Science College, Huai’an 223003,Chin)

机构地区：[1]江苏食品药品职业技术学院信息工程系,江苏淮安223003

出　　处：《计算机工程与设计》2017年第11期2988-2993,共6页Computer Engineering and Design

基　　金：淮安市产学研协同创新计划基金项目(HAC2014007);江苏省政策引导类计划基金项目(BY2015054-02)

摘　　要：尽管基于贪婪转发(greedy forwarding,GF)地理路由广泛应用于车载网(vehicular ad hoc networks,VANETs),但仍存在链路稳定性不足的问题。为此,提出基于期望传输次数(expected transmission count,ETX)链路质量感知的方向贪婪转发的地理路由协议(ETX-based link quality aware directional greedy forwarding geographic routing,ETX-DGF)。利用距离、节点移动方向以及链路质量计算每个节点的转发权值,利用经典的ETX估计链路质量,将具有最小转发权值的邻居节点选为下一跳转发节点。实验结果表明,ETX-DGF协议降低了数据包丢失率,提高了网络吞吐量。Greedy forwarding geographic routing was widely used in vehicular ad hoc networks（VANETs）,but it results in unstable link.Therefore,ETX-based link quality aware directional greedy forwarding geographic routing（ETX-DGF）was proposed.A next-hop node was chosen based on distance,direction and link quality.The well-known link quality estimation metric ETX was utilized,and the neighbor node with minimum forwarding weight value was selected as a next-hop.Simulation results show that ETX-DGF protocol reduces the packet loss ratio,and increases the total network throughput.

关 键 词：车载网 地理路由 方向贪婪转发 链路质量 期望传输次数 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]