一种基于可靠性的车载自组织网络路由算法
A Reliability-Based Routing Scheme for Vehicular Ad Hoc Networks
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摘要: 提出了一种改进的GPSR路由算法.该算法在选择转发节点过程中同时考虑位置和方向,进而提高转发节点选择的正确性来增加通信链路可靠性.用VanetMobisim交通仿真软件构建真实的VANETs网络城市场景,结合NS-2进行仿真研究,结果表明,和传统GPSR算法相比,改进的GPSR路由算法在端到端时延影响不大的条件下,能够有效地提高数据包传递率,降低数据丢包率.因此,改进的GPSR协议更适用于对实时性要求不高、而对可靠性要求较高的VANETs网络.Abstract: In this paper,an improved GPSR routing protocol is proposed,which considers not only consider the distance,but also takes into account the right direction.And then improve the forwarding right node selection to increase the communication reliability.The VanetMobiSim is used to construct typical urban simulation scenario.The protocol is simulated in NS-2under the urban scenario and compared with traditional GPSR and the new GPSR routing protocol.The simulation results show that the new GPSR protocol has higher packet delivery rate and lower loss rate,but its average end-to-end delay has not changed much compared to traditional GPSR.Therefore,the new GPSR protocol is suitable for VANETs,which requires relatively low response time and higher transmission reliability.
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