基于DTN的空间网络互联服务研究综述-论文.pdf

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1、计算机研究与发展DOI：10．7544／issnlO001239．2014．20130769JournalofComputerResearchandDevelopment51(5)：931—943，2Ol4基于DTN的空间网络互联服务研究综述林闯董扬威单志广(清华大学计算机科学与技术系北京100084)。(国家信息中心信息化研究部北京100045)(chlin@tsinghua．edu．cn)ResearchonSpaceInternetworkingServiceBasedonDTNIinChuang，DongYangwei，andShanZhi

2、guang(DepartmentofComputerScienceandTechnology，TsinghuaUniversity，Beijing100084)(DepartmentofInformatizationResearch，StateInformationCenter，Beijing100045)AbstractTheincreasingdemandonspacecommunicationstimulatestheinternetworkingandspace—groundintegrationforspacecommunications

3、ystems．Spacenetworksarefeaturedinheterogonoussubnets，dynamictopology，largetransmissiondelay，andhighlinkerrors．TCP／IPprotocolsuiterequiresstableconnectivityandshorttransmissiondelay，whichcannotbesatisfiedinspacenetworks．Asaresult，existingprotocolsforthecurrentInternetcannotbedi

4、rectlyappliedtospacenetworks．Delay／disruptiontolerantnetwork(DTN)isageneralmessage—orientedoverlaynetworkarchitecturethatcanbeadaptedtospacenetworks．ThismakesDTNaverypromisingapproachforinterconnectingspacecommunicationsystems．Thispaperfirstdemonstratesthesystemarchitecturewhi

5、chappliesDTNinspaceinternetworkingservice(SIS)，andthenanalyzesthekeycomponentsandworkingpatternsincludingprotocolstack，messageforwardingmechanism，namingandaddressing，licklidertransmissionprotocol(LTP)，etc．ThenwegivearealscenarioofMarsexploration．Bysurveyingsomekeytechnologiesa

6、ndresearchtrends，weanalyzesometechnicalproblemstobesolvedandproposesomefutureresearchdirectionsincludingrouting，security，andQoScontro1．Andthen，weintroducerelateddevelopmentefforts，practice，andaircraftverificationprojects．Finally，weanalyzetheprospectsfortheresearchandapplicatio

7、nofDTNandSIStechnologiesinChina．Keywordsdelay／disruptiontolerantnetwork(DTN)；spaceinternetworkingservice(SIS)；routing；security；QoS摘要空间通信需求的迅猛增长促使空间通信向网络化和天地一体化的方向不断发展．空间网络具有子网异构、网络拓扑不断变化、链路传输延迟大、链路误码率高等特点．TCP／IP网络协议族需要连续稳定的网络连接和较短的传输时延，空间网络不能满足这些条件，因此相关协议不能直接应用于空间网络．延迟／中断容忍网络(

8、delay／disruptiontolerantnetwork，DTN)是一种通用的面向消息的覆盖层网络体系结构，能够适应