基于分段修复的区域路由协议

在自组网中,ZRP的域间路由维护策略使ZRP具有较多的丢包数目和较多的路由重发现次数。前者使ZRP的数据包投递率较低,从而使其可靠性较低;后者使ZRP的传输时延和路由开销较高。针对上述问题,提出一种基于分段修复的区域路由协议SRZRP(Segmented Repairment based Zone Routing Protocol)。在SRZRP中,每个节点通过维护一个基于域内拓扑结构的有向无环图来保存到达其域内每个节点的多条备份路由,尽量利用备份分段路由进行域间路由修复。理论分析表明,SRZRP具有较高的可靠性。仿真结果表明,SRZRP提高了数据包投递率,说明SRZRP提高了协议的可靠性;同时,SRZRP降低了平均端到端时延和路由开销。

Reliable Zone Routing Protocol in Ad-hoc Networks

In Ad-hoc networks,interzone-route maintenance scheme of ZRP makes ZRP to have many lost packets’ number and many route rediscovering times.The former makes ZRP’s delivery ratio of data packets low,which makes ZRP’s reliability low.The latter makes ZRP’s transmission delay and routing overheads high.Aiming at the above problem,the segmented repairment based zone routing protocol SRZRP was proposed.In SRZRP,each node saved multiple backup routes to each node in its intrazone by maintaining an intrazone topology structure based directed acyclic graph,and an interzone route was repaired by using backup segment-routes as much as possible.The theoretical analysis shows that SRZRP takes higher reliability.The simulation result shows that SRZRP improves delivery ratio of data packets which shows that SRZRP improves the protocol’s reliability,and SRZRP also reduces the transmission delay and routing overheads of the protocol.