一种MANET网络的位置辅助路由协议

Ad-Hoc网络（即MANET）由于节点的移动，导致路由频繁变化．基于位置辅助路由协议（LAR1），本文提出了一种带路径优化的增强LAR1协议（ELAR1）．节点通过在接收到的路由请求包中获取其携带的其它转发节点位置信息，提高发起路由请求时预知目的节点位置的几率，降低网络内路由广播包的数量．针对路由路径中可能存在非最短路由，利用位置信息对获得的路由进行路径优化．仿真结果表明，ELAR1比LAR1有较低的路由请求开销、较高的包投递率和较低的端到端延迟．

Location-Aided Routing Protocol in Mobile Ad-Hoc Networks

A mobile ad hoc network consists of wireless hosts that may move often.Movement of hosts results in a change in routes frequently.Based on the Location-Aided Routing protocol Scheme1(LAR1),an enhanced routing protocol with path optimization is proposed,called the enhanced LAR1(ELAR1).A host obtains other host's location information that piggybacked by received route request packets.This can increase the probability of getting destination host's location information as a host initializes a route request.This results in a reduction in the number of routing broadcast packets.A source host maybe get a non-shortest path to a destination host by route request,using hosts' location information in routing path to optimize this path and get a shortest one(fewest hops).Compared with LAR1,the protocol has high packet delivery ratio with low route request overhead and low average end-to-end delay.