資源描述：
《有線交互數(shù)字電視系統(tǒng)設(shè)計(jì)與系統(tǒng)負(fù)載均衡研究(I)》由會(huì)員上傳分享，免費(fèi)在線閱讀，更多相關(guān)內(nèi)容在學(xué)術(shù)論文-天天文庫(kù)。
1、上海交通大學(xué)碩士學(xué)位論文有線交互數(shù)字電視系統(tǒng)設(shè)計(jì)與系統(tǒng)負(fù)載均衡研究姓名：忻力申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：計(jì)算機(jī)技術(shù)指導(dǎo)教師：張堯弼;陳驥20081001上海交通大學(xué)工程碩士學(xué)位論文摘要載標(biāo)準(zhǔn)差與負(fù)載率的關(guān)系進(jìn)行分析。通過計(jì)算負(fù)載標(biāo)準(zhǔn)差，驗(yàn)證了兩種算法都可以使系統(tǒng)達(dá)到負(fù)載均衡，其中改進(jìn)負(fù)載優(yōu)先算法的負(fù)載標(biāo)準(zhǔn)差略高于基本負(fù)載優(yōu)先算法，但是它減少了遍歷播出卡次數(shù)，提高了算法的性能。本文對(duì)節(jié)目副本放置算法也進(jìn)行了理論推導(dǎo)。本文的意義在于，隨著我國(guó)有線電視網(wǎng)絡(luò)雙向改造、數(shù)字電視平移不斷深入，國(guó)內(nèi)交互電視業(yè)務(wù)也不斷發(fā)展，本文在總結(jié)現(xiàn)階段交互電視系統(tǒng)建設(shè)經(jīng)驗(yàn)的基礎(chǔ)上，將為新建設(shè)的交互數(shù)字電視系統(tǒng)提供一定的
2、指導(dǎo)。關(guān)鍵詞：有線交互電視、視頻點(diǎn)播、負(fù)載均衡、請(qǐng)求調(diào)度、節(jié)目調(diào)度II上海交通大學(xué)工程碩士學(xué)位論文ABSTRACTRESEARCHONINTERACTIVEDIGITALCABLETVSYSTEMANDITSLOADBALANCINGABSTRACTThispaperdiscussesthedesignofintractivedigitalcableTVsystemanditsloadbalancing.Atpresent,theintractivedigitalcableTVsystemisdevelopedandbuiltbycableoperatorinthebackgroundo
3、ftheconstructionintwo-waycablenetworkanddigitalTV.Firstly,thispaperoverviewstheprogressofintractivecableTVindomesticandforeignandtherecentstateofthetechqiueonvideoondemand,thenconcludesthesignificancetobuildandresearchtheintractivedigitalcableTVsystem.Secondly,thispaperfullydiscussesontheend-to-e
4、ndsolutionoftheintractivedigitalcableTVsystemandseveralkeytechnologysappliedinthesystem,describesthecomponentsofthesystemanditsfunctions,andexplainthegeneraldesignbytheactualcase.Thenthepapermakeresearchesonkeytechnologysinthesystem,thatincludetheworkingprincipleofvideoondemandincableTV,thedesign
5、oftheopenstructureinhead-endsystemandthesolutionofvideoserverstructure.Thirdly,thispaperdeeplyresearchesonsystemloadbalancingandfocusonthestrategyinVODrequestschedulingandmediacopyscheduling.IndispatchstrategyofVODrequest,throughintroducingtheloadweightvaluetomeasuretheloadofstreamingcard,thispap
6、erdesignsthebasicminimumloadfirstschedulingalgorithmandimprovedIII上海交通大學(xué)工程碩士學(xué)位論文ABSTRACTminimumloadfirstschedulingalgorithm.ThenthispapersetupaVODmodelby80/20principal,andproposesastrategyofprogramcopyscheduling.Finally,simulaitionandperformancecomparisonaremade.Thispaperverifiesandcomparestwoalg
7、orithmsofVODrequestschedulingtheoreticallyandmakeasimulaitionbycalculatingloadstandarddeviation,andmakedeductiononmediacopyschedulingstrategyintheory.WiththedevelopmentofintractiveTVinChina,thispaperwillbeconsideredasn
