3G和无线网络技术的展望.PDF

2011 3 China ComputerCommunication 3G WIFI 3G WIFI 3G IEEE 802.11b IEEE 802.11a IEEE 802.11g Wi-Fi 3G ipad WIFI WIFI WIFI 3G generation CDMA 1995 CDMA2000 3G 3G 3G 3rd- 1G 1996 1997 1G GSM 3G WCDMA 384kbit/s 2008 5 24 3.6Mbit/s 2.8Mbit/s WIFI 100 54mbps WIFI WIFI PDA WIFI 802.11g/a 802.16e 802.11i WiMAX WIFI 802.16 802.11b/g/a WiFi/WiMAX Cable DSL WMAN 802.11b CDMA 3G WIFI 2008 12 31 3G TD-SCDMA WCDMA CDMA2000 TD-SCDMA Time Division-Synchronous Code Division Multiple Access 3G 41;WCDMA IP TD-SCDMA R5 WIFI CDMA2000 GSM-MAP R4 IMS IP IP 3G ANSI- 3G WIFI WIFI 3G WIFI Wi-Fi wireless fidelity WIFI ( 63 ) 61 2011 3 3.1 RIP China ComputerCommunication OSPF IP IP ICMP Internet 10 5 3.2 1 IP 3 IP IP [1] CCNA Exploration [2] CCNA Exploration IP [3] .. [4] . 1965- . . ( 61 ) 3G SCDMA 3G 3G WIFI WIFI IP WIFI TD- 3G 3G 3G WIFi WIFI [1] (10) . [2] [3] [4] . WiFi . WiFi . 3G WiFi[J]. . WIFI [J]. , 2009, [J]. ( [J]. , 2008, (02) . ), 2009, (07) . , 2009, (10) . 63