一种分簇Ad Hoc网络场景下的路由发现方案

摘要

针对分簇结构Ad Hoc网络场景下的路由问题，提出一种基于接收信号强度( RSSI)和邻居先验信息的按需路由发现方案。该方案根据网络的分簇特点，在路由发现RREQ广播中，考虑节点间RSSI和中继节点业务负载情况，引入随机延时退避转发机制，综合判断是否转发RREQ报文，以解决场景中“广播风暴”引起的路由开销问题、优化路由发现的质量。仿真结果表明，与CBRP协议路由发现的性能相比，该方案大大降低了路由发现过程中控制包的开销，缩短了路由发现的时延，总体提高了网络性能。%A scheme of reactive route discovery is proposed based on RSSI and neighbor priori-knowledge,aiming at routing problem of the clustering Ad Hoc scenario. Based on cluster network feature,this scheme considers the RSSI between nodes and traffic-load of relay nodes during RREQ broadcast,and introduces the delay back-off forwarding mechanism to comprehensively determine whether to for-ward RREQ packet,solving the routing overhead problem caused by broadcast storm and optimizing performance of route discovery. Sim-ulation results show that compared with performance of protocol CBRP,the scheme significantly reduces the route discovery control over-head and shortens the discovery delay,improving overall network performance.