基于CVT-PXA270平臺的數(shù)字集群通信系統(tǒng)邏輯鏈路層基本鏈路的研究與實(shí)現(xiàn).pdf

1、北京交通大學(xué)碩士學(xué)位論文基于CVTPXA270平臺的數(shù)字集群通信系統(tǒng)邏輯鏈路層基本鏈路的研究與實(shí)現(xiàn)姓名：馬越申請學(xué)位級別：碩士專業(yè)：通信與信息系統(tǒng)指導(dǎo)教師：孫昕20090501ABSTRACTABSTRACTABSTRACT：Digitaltrunkedsystemsprovidesecure)reliableandefficientvoiceanddatacommunicationsTheyarebeingdevelopedrapid

2、lyacrosstheglobeAtpresentthetechnologyofdigitaltrunldngsystemaboardismoremature，butthepriceishigh，andthesecurityandcredibilityisnotgoodenoughDigitaltrunkedsysteminChinawaglatedeveloped；thematurityislessandneedmoretimetoc

3、ompleteSoitisimperativetodevelopdigitaltrunkedsystemwithindependentimeBectualpropertyrightsLogicLinkControl(LLC)protocollayerisoneofthemostimportantpartofdigitaltrunkedsystemprotocolstack，anditshallhandlethelogicallinksm

4、anagement，acknowledgementofreceiveddata，retransmissionsandexpansionerrorcontr01LLCbasiclinkismainlyusedtotransmitbasicsignallingmessagesindigitaltrunkedsystem；therefore，thedevelopmentofLLCprotocollayerforbasiclinkistheke

5、yofthedevelopmentofprotocolstackindilgitaltrunkedsystemFristofa11thethesissummarizesthetechnologycharacteristicsofdigitaltrunkedsystemanditsdevelopingsituationathomeandabroadBasedonanalysingdigitaltrunkedairinterfaceprot

6、ocolstack，thecomposition，functionsandservicesofbasiclinkinLLCprotocollayerareresearchedSecondlythedevelopinglanguages，toolsandmethodaregivenafteranalyzingandcomparingseveralmethodsThirdlybasedonTelelogicTauG2andTornadoin

7、tegrateddevelopmentenvironments，theacknowledgeddatatransmissionandunacknowledgeddatatransmissionservicesofbasiclinkinLLCprotocollayerareimplementedbyusingUML，SDLandClanguages，andtheprotocolconformancetestsaremadeAtlast，t