3G与VOIP【荐】.ppt

3G行動通訊與VoIP網際電話之企業應用與發展 Content Introduction to Telecommunications 3G Licenses Auction UMTS WCDMA Wireless Applications VoIP its Implementation Conclusions Cellular Phone Generations 1G: AMPS (Advanced Mobile Phone System) = analog system 2G: GSM (Global System for Mobile communication) = digital system 2.5G: GPRS (General Packet Radio System) 3G: IMT-2000 (International Mobile Telecommunication for years 2000) Digital Services Vision Mobile Communication Evolution Mobile Phone Standards Network evolution convergence 2G to 3G evolution 3G執照-歐洲資料 台灣3G 執照拍賣 執照Ａ：遠致電信，101.69億元 執照B：聯邦電信，77億元 執照C：台灣大哥大，102.81億元 執照D：中華電信，101.79億元 執照E：亞太行動寬頻，105.7億元 總計：488.99億元 台灣3G 執照拍賣(續) 執照Ａ：2 x 15MHz (1920~1935MHz ; 2110~2125MHz) + 5MHz (1915~1920MHz) 執照B：2 x 10MHz (1935~1945MHz ; 2125~2135MHz) + 5MHz (2010~2015MHz) 執照C：2 x 15MHz (1945~1960MHz ; 2135~2150MHz) + 5MHz (2015~2020MHz) 執照D：2 x 15MHz (1960~1975MHz ; 2150~2165MHz) + 5MHz (2020~2025MHz) 執照E：2 x 20MHz (825~845MHz ; 870~890MHz) 3G 拍賣趨勢 GPRS Network 115 kbps using 8 time slots SGSN: Serving GPRS Support Node 3G Network 384 kbps ~ 2 Mbps Mobile multimedia streaming PDA handset FDD: frequency division duplex Uplink and downlink frequencies are difference and a enough frequency spacing must be exist. TDD: time division duplex Uplink and downlink use the same frequency, but transmit signals at different time. FDMA: frequency division multiple access Users use different frequency carriers 200 kHz/channel for GSM TDMA: time division multiple access Each carrier can contain many users, but they use the same carrier at different time slots. TDMA/TDD PHS from Japan Carrier spacing is 300 kHz TDMA/FDD GSM Carrier spacing is 200 kHz Each carrier contains 8 users CDMA: code division multiple access Wireless Applications Person-to-person (communications) services Mobile E-commerce services: video 1 and 2 Travel/location based services Remote diagnostics Telemetry services Mobile office (busin