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1 1 1 mori@mlab.t.u-tokyo.ac.jp IMT kHz 25kHz 12.5kHz 6.25kHz 100km 30km 2km 0.3km 150MHz, 800MHz, 1.9GHz (PDC) (IS-54/136) (GSM) (IS-95) 800/1500MHz 800MHz 800 MHz 800 MHz TDMA TDMA TDMA CDMA(DS) 3 (6) 3 (6) 8 (16) 25 khz 30 khz 200 khz 1,250 khz 42 kbps 48.6 kbps kbps /4DQPSK /4DQPSK GMSK BPSK/QPSK km km km km VSELP 11.2k/5.6bps VSELP 7.95kbps RPE-LTP 13kbps QCELP 8 32kbps / MHz, BS 5-13kbps DSP 200ms R/T FDD D-AMPS/TDMA(27 ) CDMA(9 ) GSM(4 ) AMPS (60 ) D-AMPS/TDMA(39 ) CDMA(5 ) GSM(1 ) AMPS (55 ) GSM(89%) TACS, NMT (11%) GSM(88 ) TACS, AMPS. NMT (12 ) GSM(35 ) CDMA(14%) D-AMPS/TDMA(3%) PDC, PHS, TACS, NMT (48 ) 5 Source: ITU World Telecommunication Development Report,

2 cdmaone vs PDC PHS DECT CT-2 ISDN cdmaone (EVRC) PDC (VSELP) PDC (PSI-CELP) 8kbps 6.7kbps 3.45kbps PCM: 64kbps 9.6kbps 11.2kbps 5.6kbps 1.9GHz 1.9GHz 800 MHz TDMA-TDD TDMA-TDD SCPC-TDD khz 1728 khz 100 khz 384 kbps 1.15 Mbps 72 kbps /4 QPSK GMSK GFSK 32kbps ADPCM 32kbps ADPCM 32kbps ADPCM 5 ms 10 ms 2 ms 5 ms 10 ms 2 ms 7 8 MHz, BS 32kbps ADPCM 10mW 50ms TDD PHS Network ISDN (NTT ) PHS PHS PHS 9 10 IMT-2000 Evolution Path IMT-2000 (International Mobile Telecommunications) FPLMTS(Future Public Land Mobile Telecommunication Systems) MHzWARC-92 2 Mbps W-CDMA, cdma s First Generation Analog Voice 2.4 kbps 1990 s Second Generation Digital Voice/Data kbps GSM, PDC, IS-95, IS-54/136, etc s IMT-2000 Wideband Digital Voice / Multimedia 144 kbps: vehicular 384 kbps: pedestrian 2000 kbps: indoor Global standard

3 Wideband CDMA Cellular Generation 1st Generation (1G) - Analog AMPS, NMT, other; 94 M users worldwide 2nd Generation (2G) DigitalTODAY GSM: Europe, Asia Pacific, N. America; 280M users TDMA: N. America, Japan; 100 M users CDMA: Korea, N. America; 50 M users PHS: Japan, 6M users (Microcell), 2.5 Generation (2.5G) GPRS, EDGE 3rd Generation (3G) WCDMA(GSM), CDMA2000(Qualcom), TDSCDMA(China, MII) Wireless Everywhere LAN PAN (personal area network) : Bluetooth and HomeRF ITS Wireless Pros & Cons Pros Flexibility & mobility Broad geography support at specific frequency Can compliment a wired network with bridging Convenience (Easy-to-Use and Simple to Install) Cons Relatively expensive Distance limits & wall attenuation (150ft barrier) Security must be addressed Prone to narrowband interference IEEE 802 Wireless Standards IEEE 802 committee sets standards for LANs and MANs Wireless standards IEEE Wireless Local Area Network IEEE Wireless Personal Area Network IEEE Broadband Wireless Access Wireless LANs To extend of replace wired LANs Infrastructure based of Ad-hoc configuration ISM bands Industrial, Scientific and Medical Bands Unlicensed commercial use 2.4 GHz, 5 GHz Wireless standards IEEE802.11: 1Mbps, 2Mbps, and up

4 2.4GHz PAN (Personal Area Network) 2400MHz 2500MHz ISM Band Microwave Oven Amateur Radio 2450MHz MHz MSS MHz 2427MHz Mobile ID WLAN 2400MHz 2471MHz 2497MHz Extended WLAN Frequency(MHz) Home Network / Office Network CATV Telephone line 5GHz DVD VTR Personal Computer Display Personal Computer Display 5GHz Personal Computer Display IEEE1394 LAN HomePNA(Home Phoneline Networking) HomeRF Working Group SWAP-CA(Shared Wireless Access Protocol Cordless Access) = IEEE DECT 1MHz 2MHz TDMA, CSMA/CA, 2.4GHzDECT/PHS Bluetooth MHz 2MHz, 10m Satellite Tuner Wireless LAN and PAN Wireless LAN and PAN RF 2.4 GHz Name IEEE b HomeRF Bluetooth Max speed 11 Mbps 1.6/10 Mbps 1 Mbps Modulation DSSS FHSS FHSS BW 83.5 MHz 5 GHz IEEE a HiperLAN2 MMAC 54 Mbps 54 Mbps 54 Mbps OFDM (U.S.) OFDM (EUR) OFDM (JAP) 200 MHz

5 (WLL) FR/ATM PSTN Internet Competitive Access Technologies ISDN, 128kbps, FTTH(Fiber to the Home), *, xdsl (Digital Subscriber Line), 100kbps10Mbps, CATV, 100kbps, guaranteed/best-effort, symmetric/asymmetric,,,) Satellites Coverage for wide areas at potentially higher data rates For low latency data, low earth orbit (LEO) is preferred Regional Area Providers focused on global voice services, with data second Iridium: 66 satellites, 780km, 48 spot beams/satellite, Motorola Teledesic: 840 satellites (21 orbits), 700km, $9 billion, 2Mbps voice/data, phased array antenna, faster than terrestrial network, Bill Gates, Craig McCaw 27 GEO vs LEO GEO (Geostationary Orbit) 35,786km 250ms coverage shadowing LEO (Low Earth Orbit) 1,500km GEO 1/ ITS Vehicle to Vehicle Transponder Multi-Application Transponder Toll & Parking Transponder Other ITS Communications Equipment (VICS) FM (ETC) DSRC (Dedicated Short Range Communication), 5.8GHz, Gas Payment Transponder MHz FM subcarrier 800 to 900 MHz Cellular Phone 29 Interface Devices (Built-in Display, Annunciator, Microphone, Keypad, etc. connected to the Computer) MHz GPS Receiver GHz Collision Avoidance Radar 30 5

6 IC 31 6

7 PAN (Personal Area Network) PAN nodes Grandma s Brownies 3 cups flour 1 cup grated chocolate 1 cup sugar 1 stick butter 1394 USB Camera Game Pad Printer Phone Cable Stereo Camcor der VCR TV HomePNA 20

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