基于DSR协议的备用路由机制设计和性能评价  

Design and Performance Evaluation of Backup Routing Mechanism Based on DSR Routing Protocol

作　　者：李君[1] 舒炎泰[1] 窦志斌[1] 张连芳[1] 

机构地区：[1]天津大学电信学院,天津300072

出　　处：《计算机工程与应用》2006年第36期100-103,共4页Computer Engineering and Applications

基　　金：国家自然科学基金资助项目(90604013);中兴通讯"无线Adhoc网络多媒体传输预研项目"

摘　　要：由于Adhoc网络中无线节点的移动性及无线信道的不稳定性,已经建立起来的源和目的节点间的路由在多媒体业务传输过程中往往会失效,重新发现路由会导致较大延迟和丢包,对实时多媒体业务传输这是不能接受的,因此需要在Adhoc网络中建立一种快速路由恢复机制以减少因路由失效引起的较大端到端的延迟和丢包。将有线网络中广泛使用的备用路由机制扩充到了无线Adhoc网络DSR路由协议上,并通过实验床上进行的户外实验,分析和评价了增加了备用路由的DSR协议在减少路由失效次数和投递率方面的性能改善。As the bandwidth of Wireless Ad hoc network increasing,muhimedia applications in Ad hoc network would be rapidly spreading in the near future.Becanse of nodes mobility and lack of stability of wireless channels,the established routing paths for multimedia traffics between sources and destinations may be frequently broken and rerouting will incur large delay and huge amount of dropping.This is not acceptable for real time multimedia transmissions.And some kind of fast routing recovery mechanisms is needed in order to decreasing delay and packet loss caused by path broken in this paper,backup routing mechanism,which has been widely applied in wired networks,is extended to wireless Ad hoc DSR protocol.The outdoor experiments carried in test bed and analysis show that,after extended DSR with backup routing,the number of routing failure is effectively decreased,and delivery ratio of network is raised.

关 键 词：AD HOC网络 动态源路由协议 实时多媒体业务 备用路由机制 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]