無線通訊網路 - ::: NIU

1 Email: I . I.. I. 2.. 1 2 .. 2 .. 1 4 .. 4 . 3.. ? ? ? 4.. 5.. (Wi (Wireless (Wi (Wireless l ) . Communications). Communications) . C i ti ) .. ((radio (radio ( di ffrequency: . RF) . RF).. (Mobile (Mobile Communication)- Communication)- .. (Stationary Communication)- . (Stationary Communication)- . 6.. 7.. (Pager) . (Pager) .. 8.. (WLAN, wireless local area network). (WPAN). (WWAN, wireless wide area network). (Fixed Wireless). (Protocols). 9. (WLAN).. IEEE . WLAN WLAN 11 Mbps . 11 Mbps . IEEE . 5 GHz 54 Mbps . 5 GHz . 5 GHz 54 Mbps . 54 Mbps .. IEEE . 11g WLAN. 802 11g 2. WLAN 2. 4 GHz 54 Mbps . 54 Mbps .. HiperLan HiperLan/2 WLAN.))

2 /2 .. WLAN . WLAN . 54 Mbps 5 GHz . 5 GHz . 54 Mbps . 10. (WWAN).. (Cellular Network) . (Cellular Network) . (Satellite). WWAN . WWAN . CDPD(Cellular CDPD(Cellular( Digital g Data) Packet Data) .. 11. (WPAN).. WLAN WWAN. WLAN . WWAN .. (Bluetooth) Bluetooth (Bluetooth) piconet . Bluetooth piconet .. 12.. (Fixed Wireless).. LMDS(Local Multipoint Distribution service) . service) .. 216 MHz . 216 MHz 600 MHz . 600 MHz . 10Km 155 Kbps . 155 Kbps 10Km . 13.. 14.. (radio (radio frequency).. (laser).. (Infrared). 1993 . 1993 .. 30 . 30 . (clear ((clear line of sight). g ). 15.. (Microwave).. 2 GHz 40 GHz 2 GHz .. (Bluetooth)) . (Bluetooth).)

3 (.. 16.. (LEOs, (LEOs, Low Earth Orbits).. 100 300 90. 100--300 . 90 .. (MEOs, (MEOs, Medium Earth Orbits).. 6000 12000 . 6000--12000 .. (GEOs, (GEOs, Geostationary Orbits).. 22282 . 22282 . 17.. MTS (Mobile Telephone Service).. (public (public mobile system). MTS . MTS . IMTS(Improved Mobile Telephone Service). 1965 . 1965 IMTS . IMTS . 30 MHz~30 MHz 19. 30 MHz~30 MHz 30 KHz 19 . 30 KHz . 450 MHz 26. 450 MHz 25 KHz 26 . 25 KHz . 50.. 50 . 18.. AMPS (Advanced Mobile Phone Service). AT. AT T .. (handoff) . (handoff).. AMPS . AMPS . FCC(Federal Communications Commission) . Commission) . 666.. 666 . A. A . (A carrier) B . (A band carrier) (B.)))))

4 (B. carrier) . band carrier) . MSAs (metropolitan statistical areas) . areas) . RSAs(rural service areas) 19.. MSAs (metropolitan statistical areas) . areas) . RSAs(rural service areas). FCC . FCC 734 (cellular 734 (cellular market).. MSA MSA . 306 . 306. 150,000 . 150,000 MSA.. RSA . RSA . 150. 150,000. 000 428. 428. 428 . 150,000 . 150 000 RSA. 20.. 21.. (cellular network) .. (reuse) (interference).. (capacity) . 22.. 23.. (mobile . station) . (base station).. (cell) .. (mobile switching center). (fixed network) .. 24.. (cellular . network) (cells) . (BTS, base transceiver station) . (cell phone) . (cell phone) . phone) . (registration).

5 (. (MSU,, mobile subscriber unit) (MS, mobile system) . (amplifier) . ( p ).. 25.. (MSC, (MSC, mobile switching center) (uplink). center) . (uplink) . (( . )). MSC . MSC . MSC. MSC. MSC . MSC .. MSC (call MSC routing) . (call routing) .. MSC. MSC MTSC(mobile MTSC(mobile telephone switching office) . office) MSC(mobile center) . MSC(mobile--service switching center) . MTX(mobile telephone exchange) 26.. HLR(home location register) . register) MSC. MSC .. (authentication center) . (authentication center) .. MSC GMSC(gateway MSC GMSC(gateway mobile center) GMSC. switching center) MSC. GMSC . MSC . (route). (route).. GMSC . GMSC . GMSC.. GMSC.

6 (roaming (roaming agreement) 27.. NAM(number NAM(number module) (MIN, assignment module) (MIN, mobile number) .. identification number) . (SID, ID) . (SID, system ID) .. (ESN, (ESN, electronic serial *#06#. number) . number) . *#06# .. overhead overhead g a SID. signal . ssignal S .. SID .. 28.. pre dialing .. pre--origination dialing . < . < >. > . MSC.. MSC .. MIN MIN . MIN ESN .. ESN . ESN . MSC. MSC MSC (call MSC (call request) GMSC. request) GMSC. GMSC . GMSC . (signaling GMSC . GMSC tones) . (signaling tones) .. 29. (handoff).. (handoff) .. (channel). (channel).. (frequency reuse) . reuse). reuse) . 30.. (amplifier) .. (receiver) (transmitter).

7 31.. (MSC, . mobile switching center) . MTSC(mobile telephone switching office) .. MSC(mobile-service switching center) . MTX(mobile telephone exchange). MSC (uplink) . - .. MSC . MSC . MSC MSC .. 32.. MSC . HLR(home location register) MSC .. (authentication ( center) . ).. MSC GMSC(gateway mobile switching center) GMSC MSC . (route). (route). GMSC . GMSC . 33.. 34.. (cell).. (channel ( group) . g ).. footprint .. (propagation prediction model) . 35.. T (duplex channel) . k . N .. T = kN. N . (cluster) M . C .. C = MkN = MT. 36.. N (cluster . size) 4 7 12. (co-channel (. cells) . ((co-channel interference) . ). (frequency reuse factor) 1/N.)

8 1/N. 37.. 38.. 39.. 40.. (WLAN) (wireless (WLAN) PBX) . (wireless PBX) .. GSM . GSM 100 Kbps 100 Kbps p TDMA 30 Kbps TDMA 30 Kbps SMR(Specialized Mobile Radio) . Radio) .. Radio) .. 41.. (vertical). (vertical).. (horizontal). (horizontal). 42. (privacy) . (privacy) .. (security) . (security).. (privacy) (security) . (security). (privacy) .. (wireless viruses) . (wireless viruses) .. (cell phone) . (cell phone) .. IPSec . IPSec . SSL (Secure Sockets Layer). 43.. (fixed (fixed wireless communication)).. (mobile (mobile wireless communication).. (optical(optical wireless communication). 44.