由于节点的移动性、无线链路的带宽有限、可获得的能量有限等原因,对移动Ad hoc网络进行路由提出了具有挑战性的要求。基于位置的路由协议由于不必维护明确的路由,在这种高度动态的网络中具有很好的扩展性。该文通过仿真将一种基于位置的贪婪转发路由:基于改进进程无信标路由(IPPBBLR),与一种基于拓扑的路由:动态源路由(DSR)进行了性能比较。仿真结果表明基于位置的路由比基于拓扑的路由在移动的情况下可以达到更高的发送成功率和更小的端到端延迟,且端到端延迟几乎不受移动速率的影响。
It is a challengeable issue to route in the mobile ad hoc networks due to the mobility of the nodes,the limited bandwidth of wireless links,and the limited energy available in the mobile nodes.The position based routing protocols have scalability in the dynamic networks because they needn't maintain explicit routings.This paper compares the performance of a position based routing(IPPBBLR)with a topology based routing(DSR)by simulating.The simulations show that the improved progress position based beaconless routing can achieve higher delivery rate and shorter end-to- end delay than the Dynamic Source Routing,and its delay varies little with the velocity.