一种用于自组网的主动源路由协议

该文提出一种用于自组网的按需主动源路由协议ASR。每个节点利用接收到的路由应答包和路由响应包提取到目的节点的多条路径,每条路径与一个过期时间相关联。如果在规定时间内该路由未被使用或者更新的话,将被自动删除。基于周期状态更新和主动无偿应答的动态路由维护机制获取最新的网络拓扑信息,帮助源节点动态选择最短路径。仿真结果表明,与DSR协议相比,ASR的吞吐量提高约1倍,包分发率优于95%,且能提供相对稳定的平均延迟时间。ASR协议的整体性能不受节点暂停时间的影响,受节点移动速度的影响也较小,仅在高负载情况下性能有所恶化。

An Active Source Routing Protocol for Ad Hoc Networks

This paper proposes an on demand active source routing protocol for ad hoc networks,which is termed as the Active Source Routing(ASR)protocol.Via processing the route reply and the route acknowledge messages,each node finds multiple paths associated with an expiry time,which will be removed if it has not been used or updated during such a period of time.A dynamic route maintenance approach,which is based on periodic state update and actively gratuitous route acknowledge,is introduced to obtain up-to-date network topology information and to help the source dynamically select the shortest path.Simulation results compared with DSR show that ASR provides about twice throughput,over 95 percent packet delivery ratio,and relatively stable average latency.The overall performance of ASR protocol does not been affected by the pause time and slightly decreases with the mobility rate increasing while its performance degrades only under the heavy load.