机会网络中基于传染路由的TCP性能分析.pdfVIP

第38卷第5期应用科技Vo1．38．№．5

2011年5月AppliedScienceandTechnologyMav2011

doi：10．3969／j．issn．1009—671X．2011．05．07

机会网络中基于传染路由的TCP性能分析

左朝树，雷仕英，李云

(1．必威体育官网网址通信重点实验室，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)

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“存储一携带一转发”

的路由模式来实现节点问通信，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．

关键词：机会网络；TCP／Reno；传染路由协议

中图分类号：TP393文献标识码：A文章编号：1009—671X(2011)05—0027—05

TCPperformanceanalysisofanepidemicroutingdesign

inanopportunisticnetwork

ZUOChaoshu，LEIShiying，LIYun

(1．ScienceandTechnologyonCommunicationSecurityLaboratory，Chengdu610041，China；2．CentreforWirelessInformationNet—

works，ChongqingUniversityofPostsandTelecommunicati0ns，Chongqing400065，China)

Abstract：OpportunisticnetworkshadattractedattentionfromresearchersbecauseO{theirinherentcharacteristics，

includinglonglatency，lowdatarate，andintermittentconnectivityandimplementingcommunicationsbetween

nodesbasedonthe“store—carry—forward”routingpattern．Extensiveresearchhadbeenconductedonopportunis—

ticnetworkroutingprotocolbasedonredundancy．However，fewresearchershadinvestigatedtheperformanceof

TCPinopportunisticnetworks，especiallywhenepidemicroutingisused．WeevaluatedtheperformanceofTCPin

opportunisticnetworks，especiallywhencombinedwithepidemicrouting，simulatedandcomparedtheperfomrance

ofTCPinopportunisticnetworkswithdifferentrouting，andanalyzedthefeasibilityofcombinationbetweenTCP

andepidemicrouting．TheresultsshowedthatTCPcouldworkwellwithepidemicroutingoncertainconditions．

However，thefloodingofepidemicroutingandintermittentconnectivityofnetworkdegradedt