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1、ABSTRACTThedevelopmentofautomobileindustrytopromotethedevelopmentofautomotiveelectronics,butalsothedevelopmentofautomotivenetworkbusrapid,anetworkbusisCANbusdevelopmentquickly.Alltheinformationofthecontrollerinthenetworkofinteractivemostbus,signalcommunicationhasgreateffectonvehicl
2、esafety,sothenetworksecurityisparticularlyimportant.Ifanodeonthebussuddenlydroppedorfaultoccurs,thesignaltransmissiontoothernodeswillwaitforthenode,islikelytohaveotherserioussecurityproblems.Inordertoimprovethesafetyofbus,eachnodeneedsanetworkmanagementsystem,tosolvethenodeintotheb
3、us,leavingthebus,statetransition,testingitsnetworkstatusandotherfunctions,andcandetectothernodesonthebus,inordertoensurethecommunicationsecurity.Inthisthesis,aimingattheaboveproblems,theautomobileinstrumentastheplatform,thenetworkmanagementsystemofOSEKstandardastheresearchobject,fo
4、cusonthedevelopmentandimplementationofthesystemalgorithmandsoftware.Themainresearchcontents:Firstly,thehardwareandsoftwarerequirementsoftheautomobileinstrument,wehaveproposedanewmethodforCANbustorealizethecommunication.ThedesignofthenetworktopologystructureandlowCAN,highspeedCAN,LI
5、Ncomposition,automobileinstrumentinhighspeedCANbus.Analysisoftheautomobileinstrumenthardwarerequirements,designedthenetworkcommunicationsoftware,toprovidesupportfornetworkmanagementsystem.Secondly,thenetworkmanagementcontentsinOSEKstandards,putsforwardthreemethodstorealizenetworkma
6、nagementmessageoperationfunction,namely,onlinemessage,logicringmessage,limpmodemessage.Throughtheanalysisofthenetworknodestate,messagedemand,timemonitoringneeds,toestablishalogicalringmodel,busdesignofthenetworkmanagementsystemofsleepandwake,designthealgorithmandprogramonlinemessag
7、e,logicringmessage,limpmodepacket,networkmanagementsoftwaredesignofAutomobilestandardOSEK.Finally,Studyoftheembeddedcontrollerbustestenvironment,proposesavirtualnodeandthenodetestmethod.Theautomobileinstrumenttestenvironment,testtarget,testedbyprofessionaltoolCANoe,andfinallytheana
8、lysisandevaluationoftestre
