实时Ad hoc按需距离矢量路由协议.pdfVIP

第36卷 第6期 电子 科 技 大 学 学 报 、，．0J．36 No．6 2007年 l2月 Journal ofUniversity ofElectronic Science and Technology ofChina Dec．2007 实时Ad hoc按需距离矢量路由协议 周满元，周力为 (桂林电子科技大学计算机与控制学院 广西 桂林 ~1004) 【摘要】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 h0 需距离 矢量路由(A0Dv)协议的基础上，提出了一种具有实时意识的A-d h0c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A0Dv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． 关 键 词 Adhoc网络；Adhoc-R-需距离矢量路由；实时意识；实时Adhoc-R-需要距离矢量路由 中图分类号 TP393 文献标识码 A A Real—-Time Ad hoe On—-Demand Distance Vector Routing Protocol ZHOU Man-yuan，ZHOU Li-wei (School ofComputer Science and Con~oL Guilin University ofElectronic Technology Guilin Guangxi 54 1004) Abstract 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(RAODV1 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 norm al network load condition．Under high network load condition，the perform ances of the two protocols both declined． However,the performance ofRAODV declined much smaller than that ofAODV：the form er has higher packet delivery fraction，lower average end-to-end delay ofdata packets，and routing load than the later． Key words Ad hoc networks； Ad hoc