无线移动互联网：原理、技术与应用 教学课件 作者 崔勇 CH3 AdHoc_2.ppt

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1、CS80240333CUIYong1MobileAdhocnetwork:MANETCS80240333Instructor:CUIYongCS80240333CUIYong2OutlineRoutinginMANETMANETRoutingProtocolDesignReactiveprotocolsDSRandOptimizationAODVProactiveprotocolsOLSRDSDVHybridprotocolsZRP,LANMARConclusionCS80240333CUIYong3Unic

2、astRoutinginMANETHostmobilitylinkfailure/repairduetomobilitymayhavedifferentcharacteristicsthanthoseduetoothercausesInstabilityRateoflinkfailure/repairmaybehighwhennodesmovefastNewperformancecriterianeededroutestabilitydespitemobilityenergyconsumptionPropos

3、edprotocolsSomehavebeeninventedspecificallyforMANETOthersareadaptedfromolderprotocolsforwirednetworksNosingleprotocolworkswellsomeattemptsmadetodevelopadaptiveprotocolsCS80240333CUIYong4TypesofProtocolsOn-demand/reactivetheroutesaredeterminedwhentheyarerequ

4、iredbythesourceusingaroutediscoveryprocess;Global/proactivedetermineroutestoallthedestinationsatthestartupmaintainbyusingperiodicrouteupdateprocess;Hybridcombinethebasicpropertiesofthefirsttwoclassesofprotocolsintoone.Advantage&Disadvantage?Internetrouter?B

5、GP/OSPF/ISIS/RIP?CS80240333CUIYong5Trade-offLatencyofroutediscoveryProactiveprotocolsmayhavelowerlatencysinceroutesaremaintainedatalltimesReactiveprotocolsmayhavehigherlatencybecausearoutefromXtoYwillbefoundonlywhenXattemptstosendtoYOverheadofroutediscovery

6、/maintenanceReactiveprotocolsmayhaveloweroverheadsinceroutesaredeterminedonlyifneededProactiveprotocolscan(butnotnecessarily)resultinhigheroverheadduetocontinuousrouteupdatingDependonthetrafficandmobilitypatternsCS80240333CUIYong6Howtosendmessagestodestinat

7、ionRoutingReactiveProactiveNoroutinginadvance?Anysimplesolutions?CS80240333CUIYong7FloodingforDataDeliveryBASEFHJDCGIKRepresentsthatconnectednodesarewithineachother’stransmissionrangeZYRepresentsanodethathasreceivedpacketPMNLSendingapacketfromStoDCS80240333

8、CUIYong8FloodingforDataDeliveryBASEFHJDCGIKRepresentstransmissionofpacketPRepresentsanodethatreceivespacketPforthefirsttimeZYBroadcasttransmissionMNLCS80240333CUIYong9FloodingforDataDeliveryBASEFHJDCGI