一种具备实时意识的Ad hoc路由协议  

An Ad hoc Routing Protocol Equipped with Real-time Sense

作　　者：邬春学[1] 赵献静[1] 

机构地区：[1]上海理工大学光电信息与计算机工程学院,上海200093

出　　处：《小型微型计算机系统》2012年第2期315-318,共4页Journal of Chinese Computer Systems

基　　金：国家自然基金项目(60573142;60874002)资助;湖北省自然科学基金项目(2004ABA076)资助;湖北省教育基金重点项目(2004D003;D200512002)资助;科学研究计划技术创新基金项目(J200512001)资助

摘　　要：在任何类型的网络中,影响实时数据传输的因素无非是传输的延迟和包的丢失.Ad hoc网络拓扑结构的动态变化使得实时业务的服务质量(QoS)更难得到保障.包的丢失不仅会造成包的错误,还会为后继的包的传输带来错误[1].当今适用于Adhoc网络的路由协议都是针对大规模的Ad hoc网络,并且都趋向于减少路由开销,相应的带来很多影响数据实时性的弊端.本文会分析找出这些弊端的来源并加以改进,提出一个简化的实时DSR协议-MRDSR.仿真实验证明,MRDSR降低了传输的丢包率,降低了点到点的延迟.Real-time data is very sensitive for delay and packet losses. And the changing topology in Ad hoe network make it much harder to guarantee the QoS on real-time data. A lost frame will not only cause error within its frame but also introduce error propaga- tion in the following frames. The most common routing protocols today are reactive routing protocols that focus on scalability for very large network and to reduce the routing overhead. Accordingly, it brings lots fault to the transfer of real-time data. This paper will an- alyze the current protoeol＇s weakness for real-time transferring and give some solution to rectify these faults. Finally we propose a Multipath Real-time DSR protocol, MRDSR. Simulation results show that the new protocol is improved compared to the original pro- toeol. End-to-end delay and packet loss rate are all reduced, and the transmission efficiency is improved at the same time.

关 键 词：AD HOC网络 网络实时性 DSR改进 及时路由发现 GloMoSim仿真 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]