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1、計算機研究與發(fā)展DOI：10．7544“ssn1OOO一1239．2014．20110891JournalofComputerResearchandDevelopment51(5)：984—996，20l4綠色路由器的低功耗FIS轉(zhuǎn)發(fā)機制及其能耗分析袁博戴藝汪斌強(國家數(shù)字交換系統(tǒng)工程技術(shù)研究中心鄭州450002)。(國防科學(xué)技術(shù)大學(xué)計算機學(xué)院長沙410073)(yuanbonet@163．corn)ALow—PowerFISMechanismandEnergyAnalysisforGreenRouterYuanBo，DaiYi，andWangBinqiang(NationalDigitalS
2、witchingSystemEngineering＆TechnologyCenter．Zhengzhou450002)。(CollegeofComputer，NationalUniversityofDefenseTechnology，Changsha410O73)AbstractWiththedevelopmentofthenextgenerationInternet，theexistingrouterarchitecturefacesmanyproblems，suchasperformance，complexityandpowerconsumption．Withtheincreasingof
3、networksize，howtoimplementalow—powerforwardingisachallengeingreenandhigh—performancerouterdesign．Inthispaper，weconsiderbuildingaFISmechanismbasedonforwardinginswitchingidea．Thememoryrequiringandaccessingarereducedbyblurredlyforwardingandpipingswitching．ThemultilevellineframeworkinFISismadebymanyslow
4、processingunits．Itcanobtainhigherperformanceandlookupspeedthroughcosmicallyrunning．Simultaneously，itcanreducethecomplexityofhardwareimplementation．EnergymodelofFISandFBSisestablished．Weproposedifferentmodelingmethodologiesfornodeswitches，internalbuffersandinterconnectwiresinsideswitchfabricarchitect
5、ures．Inthispaperfourswitchfabricarchitecturesareana1yzedunderdifferenttrafficthroughputanddifferentnumbersofingress／egressports．Experimentsusingreal—liferoutingtablesdemonstratethatourFISsolutioncanreducethepowerofroutinglookupby12．59／6thanFBSclearly．Thisframeworkandanalysiscanbeappliedtothearchitec
6、turalexplorationforlowpowerhighperformancenetworkrouterdesigns．Keywordslowpower；greenrouter；routingforwarding；routinglookup；energyanalysis摘要隨著互聯(lián)網(wǎng)的發(fā)展，現(xiàn)有路由器體系結(jié)構(gòu)在性能、復(fù)雜性和節(jié)能等方面存在許多難以克服的問題，如何實現(xiàn)高效節(jié)能的轉(zhuǎn)發(fā)機制是綠色高性能路由器設(shè)計面臨的重大挑戰(zhàn)．基于邊交換邊轉(zhuǎn)發(fā)思想提出一種邊轉(zhuǎn)發(fā)邊交換(forwardinginswitching，F(xiàn)IS)機制，通過模糊轉(zhuǎn)發(fā)流水交換減少了路由器轉(zhuǎn)發(fā)和交換階段的存儲需求和訪存次數(shù)．該
7、機制復(fù)用多個低速節(jié)點構(gòu)成多級流水線結(jié)構(gòu)，通過低成本執(zhí)行部件的規(guī)?；\行提高交換性能和IP查找速率，可降低報文查表交換的硬件實現(xiàn)復(fù)雜度．建立了先轉(zhuǎn)發(fā)后交換(forwardingbeforeswitching，F(xiàn)BS)機制和FIS機制的能耗模型，使用不同模型模擬內(nèi)部緩存、輸入輸出端口等具有不同結(jié)構(gòu)的節(jié)點，仿真實驗證明FIS機制比現(xiàn)有的FBS機制減少約12．5的能耗．提出的分析模型適用于可擴展和綠色節(jié)能
