EPON在計(jì)算機(jī)控制系統(tǒng)中的研究與應(yīng)用.pdf

1、西安電子科技大學(xué)碩士學(xué)位論文EPON在計(jì)算機(jī)控制系統(tǒng)中的研究與應(yīng)用姓名：陳光武申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：電路與系統(tǒng)指導(dǎo)教師：李玉山20060101AbstractAbstractTransferEPONintopracticalindustrycomputersystem，useEtherentprotocolonammunisationsbetweencontrolcomputerandfieldequipments，thechanne

2、lmediumusestheopticalfiber。achievethelong—distancereal—timecontr01simplifymultilayercomputercontrolsystemcommunicateprotocol。alsocanmarkablyenhancereliabilityofthesystemThispaperbasedonthecharactersofEPONandpracticalcomp

3、utercontrolsystemthroughcomparingstaticanddynamicbandwidthassignmentalgorithmofEPON，proposesonekindofprovedsuitabletothepracticalfieldcontrolsystemAndcompletethehardwareandsoftwaredesignsofONUOnthefoundationofthealgorith

4、madoptsrotationcallandreplayway，withinfixedtimecycle，determinesaminimumtimegapandamaximaloneWhichcanrespondeachintelligentnodeandcanimprovethesystem’Sreal—timeatthesametimeThealgorithmestablishesdifferentpritorityaceordi

5、ngtothedifferentimportanceofintelligentnode’sdutyofthepraclicaJequipmentwhichCandeterminetheorderIfthelowprioritynodecannotberespondedincertaintimeit’sprioritygradecanbeincreasedautomaticallyAlsothealgorithmhasachievedau

6、tomaticwithdrawingandindrawingofintelligentnodeTheimprovedalgorithmhasbeenemulatedinthepaperThehardwareofONUhasbeenachievedinthepaperusingMCU，ThecommunicationfunctioncometrueoftheimprovedalgorithmandopticalEthernetthroug

7、hmigratetheNut／OSoperatingsystemandsoftwareprogramming011theMCUFinally，thepaperproposedtheadvantagesincombiningEPONwithcomputercontrolsystem，andtheproplemsindesigingandtesingthemThroughtheimprovementthedesignandtestonONU

8、withdynamticbandwidthalgorithm，it’SprovedtobefeasiblethatutilizesEPONinthecomputercontrolsystemwhichcallsatisfythesystem’Srealtimerequests，andenhancetheusabilityandtheflexibilityofthesystemKeywords：EPONDynamticbandwidtha