实时Ad hoc按需距离矢量路由协议

针对现存的Ad hoc网络路由协议普遍存在延时较大、不能满足实时应用的传输需求的缺陷,在Ad hoc按需距离矢量路由(AODV)协议的基础上,提出了一种具有实时意识的Ad hoc按需距离矢量路由协议实时Ad hoc按需要距离矢量路由(RAODV),并通过仿真实验在不同的网络状态下对RAODV与AODV的性能进行了对比。实验结果表明:在常规网络负载的情况下,RAODV可以获得和AODV同等水平的分组投递率,而数据分组的平均端到端延时和路由负荷则相对要低一些;在网络负载比较大的情况下,两种协议的性能都有所下降,但相对于AODV来说,RAODV的性能下降幅度要小很多,并且可以获得更高的分组投递率,更低的数据分组平均端到端延时和路由负荷。

A Real-Time Ad hoc On-Demand Distance Vector Routing Protocol

Most of the existed Ad hoc routing protocols have the disadvantages of high delay and can not satisfy the transmission requirements of real-time applications. Based on the Ad hoc On-demand Distance Vector Routing (AODV) protocol, a Real-time aware Ad hoc On-demand Distance Vector routing (RAODV) protocol is proposed in this paper. The performances of RAODV and AODV under different network conditions are compared by simulation experiments. The experiment results show that RAODV can obtain as good packet delivery fraction as AODV, but has lower average end-to-end delay of data packets and lower routing load than AODV under normal network load condition. Under high network load condition, the performances of the two protocols both declined. However, the performance of RAODV declined much smaller than that of AODV: the former has higher packet delivery fraction, lower average end-to-end delay of data packets, and routing load than the later.