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Chapter2:WirelessNetworkingChapter2outlineElementsofawirelessnetworkElementsofawirelessnetworkElementsofawirelessnetworkChapter2outlineCharacteristicsofselectedwirelesslinkstandardsWirelessLinkCharacteristicsWirelessLinkCharacteristicsWirelessnetworkcharacteristicsCodeDivisionMultipleAccess(CDMA)CDMAalgorithm：supposeNnodes,asenderSenderCDMAcodedsignalfordatabitdi:{Zi,m}={di·cm}(cm,m=1,2,…,M—,sender’sCDMAcodebit)atreceive-end,recoverthedatadi:（cm,m=1,2,…m—sender’sCDMAcodebit）CDMAdemonstration:Ifasenderissending……×CDMAalgorithm：supposeNnodes,NsendersForsenders,itsencodedoutputisChapter2outlineIEEE802.11WirelessLAN802.11LANarchitecture802.11:Channels,association(合作)802.11multipleaccessprotocol802.11MACProtocol:CSMA/CAAvoidingcollisions(more)CollisionAvoidance:RTS-CTSexchangeframecontrolframecontrolChapter2outlineCellularnetworks:thefirsthopCellularstandards:briefsurveyCellularstandards:briefsurveyCellularstandards:briefsurveyCellularstandards:briefsurveyChapter2outlineWhatismobility?Howdoyoucontactamobilefriend:Mobility:approachesIndirectRouting:commentsIndirectRouting:movingbetweennetworksMobilityviaDirectRouting:commentsChapter2outlineMobileIPMobileIP:agentdiscoveryMobileIP:registrationexampleChapter2outlineHandlingmobilityincellularnetworksMobility:GSMversusMobileIPChapter2outlineWireless,mobility:impactonhigherlayerprotocolsChapter2outlineChapter2SummaryHomeworkmultipathpropagation(多径传播)
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