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[e-mail]„„„„„„2G3G„2G3G„——„„„„199911„20013„199910„200011„CDMA2000200011„—WCDMA2000111„„„„„1„2„3„42„„„„2G1„2G2„3G1„3G2„„„„„1AMC20001130„2MAC50001231EMAILWord---„„„„„„„„„„„„„„„„„„„„Beyond3G„„„„„SIM/UIM3-30kHzVLF„waveguide„„„30kHz-3MHzLMMF„LM„„„MF„&„AM3-30MHzHF„„„„„30MHz--3GHzVHFUHF„„„&„FM&...3-30GHz15–30GHz„LOS„„„„„30-300GHzExtra„„„e.g.60GHz„„„ITUMHz4400500035004200170026901668.4169014271525470960440470406.1430335.4339.9223328.6174223156.8375174150.05156.7625148149.91381448710075.2876874.885468475029.747WARC’92„MHz„MHzIMT2000188520252110220017002690198020102170220016101626.52483.52500137138400.15401148149.9„5GHz17GHz2860GHzWLAN802.11aHyperLANWMANLMDS1CellularstationVCnαn2t0t1t1+τ11t1+τ12t0t2t2+τ21t2+τ22t0+αt3t3+τ31t3+τ323——„„„CDMAMAI---„„„„„„„„4„HLRVLR„„„„„„„„„„„„„„„---TDDFDD„---FDMATDMACDMASDMA„---„---MANLANPANVAN„---„---„---„------OSI„„„„„„ASN.1„Web„---„1G2G3G---„---„---„---„WLAN---802.11HyperLAN„WPAN/WVAN---„WMAN---WLLLMDS„---DABDVB1„„„„„„„„2„„„„„„Turbo„AMC3„„ISI„ISI„——DFE“Viterbi”——MLSE„„OFDMMC-CDMA„MIMO4„CDMAMAI„UWBGHz„„„„FCC„FDMATDMACDMASDMA„„ALOHAALOHAPRMA„CSMABTMA„„CDPDGPRS„VoIP„„„„„1„MM„„„MIPMIPv6MIP„RRM„RRM„„MACRLCARQTCP2„AAA„„„„„„„„„„„„„„„„„„„„„„„„Beyond3G„„200020022004200620082010201220142016051015202530„IP2004199820002002200420060246810121416+IPIP()„PSTN„PCSPBX„„Internet„adhocInternetWLANWPAN„Internet---„1880“”——7002515km„19“”„18971912„1905---„19211945„1928——AM„30„1935FM„3„“”„“”---„19461968„1946Bell„——FM120kHz3kHzAM3kHz60FM30kHz/25kHz„——„60„60“IMTS——”FM150/450MHzFM30„„„30~50km50~200W30m„PSTN„„„„„——„19491982„40Bell601974„1978——AMPS10FM——1982AT&T7„1983AMPS1980NMT1979NAMTS1985TACS800/900MHz„„„„„„BASESTATION5GHAPS20-100Mb/sIP2020s1980s4GHAPS2-20Mb/sIMT-20003G2Mb/sIPGSMIS-54PDCDECTPHS2010s1990s2000s„----„„---„FM„FDMA——„„8090——„1992GSM„1991IS-54„1993PDC„1993IS-95(N-CDMA)„„„GMSKQPSK„TDMACDMA„„„RAKE„„„——„90Wideband2Mbps„1G2G„2G3G25„ITU„WCDMACDMA„cdma2000IS-95„TD-SCDMACDMA„UWC-136IS-136„DECT„„CDMA„QPSK/„FDMA/TDMA/CDMA„„mediaMultimedia„DS-CDMA„„„QoS„IMT-2000„2GHzIMT-2000——IP„2G3G„Broadband100Mbps„3GB3GIP510ITUB3G„B3GNomadic„B3G3G3G„BroadbandB3G100Mbps„Mbps/3GB3Gdenotesinterconnectionbetweensystemsvianetworksorthelike,whichallowsflexibleuseinanyenvironmentswithoutmakingusersawareofconstituentsystemsMobilityMediumBSdigitalBroadcastingTerrestrialdigitalbroadcastingCommunicationspeed(Mbit/s)1Nomadic/LocalareawirelessaccessLowIMT-200010100EnhancedIMT-2000SystemsbeyondIMT-2000EnhancementNewElementsofSystemsBeyondMobileAccessHigh---„„Whoever„Whenever„Wherever„Whomever„Whatever„„UMTS20052010„Orange2020„2003„WLAN2005WLAN„Internet2010Internet2090„2015„20252030„“”„“”„“”„“”PC„PC19802000PersonalComputer„PC20012020PersonalCommunication„PC20202040PowerChip„„„„„„„„„„„„„„„„„„„„Beyond3G„„„„„„„„„„„„ITU„ITU„ITUIFRBCCIRCCITT„19933ITU„CCIR+IFRBITU-R„CCITTITU-T„BDT„„CEPT„ETSI1988GSMDECTHiperLANUMTS„„/EIA/TIA„CTIA„FCC„ANSI„„TTC„——CWTS„IEEELANATMInternetIETF