移动Ad hoc网络基于链路质量的地理位置路由协议  

Link-quality Aware Beacon-less Geographic Routing Protocol for Mobile Ad hoc Networks

作　　者：董萍[1] 兰少华[1] 钱焕延[1] 

机构地区：[1]南京理工大学计算机科学与技术学院,南京210094

出　　处：《计算机科学》2012年第7期48-51,共4页Computer Science

基　　金：国家自然科学基金项目(90820004);江苏省科技支撑计划-工业部分(BE2010199)资助

摘　　要：基于地理位置的路由算法要周期性发送信标报文,以维护邻居节点的位置信息。但是频繁广播信标控制包会占用大量的网络带宽,于是近几年提出了基于竞争机制的无信标路由算法来减少控制开销。然而,大部分路由协议没有考虑到实际无线信道的不可靠性,使其在实际应用中表现不理想。提出了一种基于链路质量的地理位置跨层路由协议(LQBGR)。它利用跨层技术,在竞争机制中充分考虑链路质量因素,通过选择通信质量较好的链路来减少重传,提高整体网络性能。最终仿真结果表明,该协议能够达到较高的数据包投递率、较短的端到端延迟及较低的通信总量。Geographic routing algorithms require nodes to periodically transmit HELLO messages to allow neighbors get their positions （beaconing mechanism）. But periodically transmitting the messages will result in high bandwidth o- verhead. For this reason, beacon-less routing algorithms have been recently proposed to reduce the control overhead. However, existing beacon-less algorithms don＇t consider unreliability of realistic physical channels. In this paper, a novel beacon-less routing protocol called LQBGR was presented. Based on cross-layer routing technology, its design takes link quality into account to reduce the retransmission and enhance the performance. Simulation results show that LQBGR achieves higher packet delivery ratio, shorter end-to-end delay and lower traffic.

关 键 词：竞争转发 链路质量 跨层路由 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]