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1、歲臻交碩士學(xué)位論文贍孑基于IXP2350的IP．DSLAM上行數(shù)據(jù)流處理的設(shè)計(jì)與實(shí)現(xiàn)DesignandImplementofIP-DSLAMUpstreamDataProcessingBasedonIXP2350作者：郝麗導(dǎo)師：張思東北京交通大學(xué)2006年12月中文摘要摘要：數(shù)字用戶線接入復(fù)用器(DSLAM)是實(shí)現(xiàn)端到端ADSL接入系統(tǒng)中最關(guān)鍵的設(shè)備。隨著ADSL業(yè)務(wù)的不斷擴(kuò)大和普及，DSLAM逐漸從ATM．DSLAM過渡到IP．DSLAM，IP．DSLAM將成為DSLAM的發(fā)展趨勢(shì)。由于現(xiàn)有的IP．DSLAM設(shè)備一般基于通用處理器或A
2、SIC芯片架構(gòu)，不能做到高性能和靈活性的兼?zhèn)?，為了提高IP．DSLAM的處理能力，滿足下一代互聯(lián)網(wǎng)寬帶化和綜合化的要求，本文采取了具有強(qiáng)大處理性能的IXP2350網(wǎng)絡(luò)處理器來架構(gòu)IP．DSLAM設(shè)備。論文進(jìn)行了IP．DSLAM上行數(shù)據(jù)流處理的設(shè)計(jì)和實(shí)現(xiàn)，將其數(shù)據(jù)面分為AAL5接收模塊、I，IC／PPPoE解封裝模塊、IPv4轉(zhuǎn)發(fā)模塊、以太網(wǎng)封裝模塊、數(shù)據(jù)包隊(duì)列管理模塊、數(shù)據(jù)包調(diào)度模塊、以太網(wǎng)發(fā)送模塊，從數(shù)據(jù)結(jié)構(gòu)和處理流程兩個(gè)方面對(duì)各個(gè)子模塊進(jìn)行了深入的描述，并給出了具體的實(shí)現(xiàn)方案。論文還對(duì)“基于IXP2350網(wǎng)絡(luò)處理器的IP．DSLAM
3、系統(tǒng)”的數(shù)據(jù)面設(shè)計(jì)和實(shí)現(xiàn)進(jìn)行了仿真，從功能和性能方面對(duì)結(jié)果進(jìn)行了分析，為修正和驗(yàn)證系統(tǒng)功能設(shè)計(jì)，提高系統(tǒng)性能指標(biāo)提供了依據(jù)和手段。論文最后對(duì)基于IXP2350的IP．DSLAM系統(tǒng)設(shè)計(jì)的未來思路作了展望。關(guān)鍵詞：網(wǎng)絡(luò)處理器；基于IP的數(shù)字用戶線接入復(fù)用器；上行；模塊分類號(hào)：TN915．05ABSTRACTABSTRACT：DSLAMisthekeyequipmentinapplyingpoint--to--pointADSLconnectingsystem．Duetotheincreasingdevelopmentandpopulari
4、zationofADSLtheDSLAMhasseenatransitionfromATM—DSLAMtoIP-DSLAM，theIP-DSLAMwillbecomethedevelopmenttendencyofDSLAM．BasedongeneralprocessororASICchiparchitecture，theexistingIP-DSLAMequipmentcannotachievehighperformanceandflexibilityatthesametime．Inordertoimprovetheprocessin
5、gcapabilityofIP．DSLAMinsatisfyingthedemandofbroadbandandintegrationofnextgenerationnetwork，thisarticleadoptsIXP2350networkprocessorwithpowerfulprocessingcapabilitytoconstructtheIP-DSLAMequipment．ThisarticleemphasizesonintroducingthedesignandrealizationofIP-DSLAMupstreamd
6、ataprocessing，whichconsistsofmanymodules：AAI5Receive，LLC／PPPoEDecapsulation，IPv4Transmitting，EthernetEncapsulation，Packetqueuemanager,Packetscheduler,Ethemetpackettransmit，andSOon．Everysub-modulehasbeenanalyzedindepthanddetailwithreferencetotwoaspects：datastructandproces
7、singprocedure．Furthermore，practicalblueprinthasbeenputforward．Inaddition，thisarticlealsodoesthesimulationtestof“theIP—DSLAMsystembasedonIXP2350networkprocessor”，andanalyzesthesimulationresultontwoaspects：function&performance．Allofthesehavebeenagreathelptotestandamendsyst
8、ematicalfunctiondesigninimprovingsystematicalcapabilityindex．Atlast，hisarticleviewsthefutureofIP．DSLAMs
