Communication-Ad-Hoc-NetworkPPT课件

CommunicationAd-HocNetworks,DongseoUniversityDivisionofComputer&InformationEngineeringCryptographyandNetworkSecurityLaboratory,MohammedAbsi:20185123FuRui:20185106,1,1,.,TypesofAd-HocNetwork:,MobileAd-HocNETwork(MANET).VehicularAd-HocNETwork(VANET).FlyingAd-HocNETwork(FANET).ShipAd-HocNETwork(SANET).,2,.,Amobilead-hocnetworkgenerallydoesnothaveanyinfrastructure(basestations)andeachmobilehostalsoperformsasarouter.Communicationbetweenvarioushoststakesplacethroughwirelesslinks.ThisfigurerepresentsaMANETof4nodes.Node1cancommunicatedirectlywithNode2,Node3andNode4.Butanycommunicationbetween(Nodes2and3)or(Node3and4)mustberoutedthroughNode1.,ArchitectureofMobileAd-HocNETwork(MANET).,Figure:AMANETof4Nodes.,3,.,ArchitectureofVehicularAd-HocNETwork(VANET),ThecommunicationinVANETisbroadlyclassifiedasVehicletoInfrastructure(V2I),VehicletoVehicle(V2V).ThecommunicationsbetweenV2VandV2IaredisplacedoutviatheDedicatedShortRangeCommunication(DSRC)Standard,soeachRSUandOBUusesaDSRCbasedonIEEE802.11ptoenterthewirelesschannel.,4,.,ArchitectureofFlyingAd-HocNETwork(FANET),FANETisanad-hocnetworkestablishedbetweenUAVstoovercomeproblemsininfrastructurebasednetwork.ThemainproblemwithFANETiscommunicationbetweenUAVs.In2012,IlkerBekmezciintroducedtheconceptofFANET,anad-hocnetworkofflyingnodesandprovidedadetailedsurveyonFANET.UAVsareusedinmanyapplicationssuchasTrafficMonitoring,CropMonitoring,SearchandRescue,becauseoftheirlowcost,easyinstallation,betterflyingcapabilities.,5,.,ArchitectureofShipAd-HocNETwork(SANET),Shipstheymaycancommunicateusingtomodecombination.Firsttheycancommunicateusingsatellitewherethissatellitecanconnectshiptoshore,shoretoshipandshiptoshipwiththehighbandwidthfrequency.Secondistheshiptoship,shiptobasestation,basestationtoshipcommunicationwhereusinglimitedrangeforcommunication.,6,.,Inamaritimewirelesscommunicationenvironment,thechannelstateorqualityoveracommunicationlinkisaffectedbythreeattenuationfactorsPathloss.Pathlossisduetothepropagationdistancebetweenthetransmitterandreceiverstationalthoughthecommunicationlinkbetweenthemisinthelineofsight(LOS)ofthetransmitter.Pathshadowing.Pathshadowingiscausedbythelargeobstaclesbetweenthetransmitterandreceiverstationandmaycausemoreattenuationthanpathloss.Multipathfading.Multipathfadingiscausedbythemultiplereceptionsoftheoriginalsi