机会网络中基于传染路由的TCP性能分析  

TCP performance analysis of an epidemic routing design in an opportunistic network

作　　者：左朝树[1] 雷仕英[2] 李云[2] 

机构地区：[1]保密通信重点实验室,四川成都610041 [2]重庆邮电大学无线信息网络研究中心,重庆400065

出　　处：《应用科技》2011年第5期27-31,共5页Applied Science and Technology

基　　金：国家自然科学基金资助项目(61071118;60702055);教育部新世纪优秀人才支持计划资助项目(NCET-07-0914)

摘　　要：不同于传统互连网络,机会网络具有时延长、数据率低和间断连接等特性,其以"存储-携带-转发"的路由模式来实现节点间通信,其研究重点是基于冗余的机会网络路由协议.为了研究机会网络中TCP的性能,特别是与传染路由结合时的TCP性能,通过对机会网络使用不同路由时TCP的性能进行对比仿真,分析了TCP与传染路由结合的可行性.仿真结果表明:传染路由在一定条件下能与TCP结合,但传染路由的"洪泛"特性和机会网络的间断特性会使得TCP性能较差.Opportunistic networks had attracted attention from researchers because of their inherent characteristics,including long latency,low data rate,and intermittent connectivity and implementing communications between nodes based on the＂store-carry-forward＂ routing pattern.Extensive research had been conducted on opportunistic network routing protocol based on redundancy.However,few researchers had investigated the performance of TCP in opportunistic networks,especially when epidemic routing is used.We evaluated the performance of TCP in opportunistic networks,especially when combined with epidemic routing,simulated and compared the performance of TCP in opportunistic networks with different routing,and analyzed the feasibility of combination between TCP and epidemic routing.The results showed that TCP could work well with epidemic routing on certain conditions.However,the flooding of epidemic routing and intermittent connectivity of network degraded the performance of TCP.The paper analyzes the problems and some related suggestions are given as well.

关 键 词：机会网络 TCP/Reno 传染路由协议 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]