電信行業(yè)--3G行動通訊與VoIP網(wǎng)際電話之企業(yè)應用與發(fā)展( 32頁)ppt課件

1、3G行動通訊與VoIP網(wǎng)際電話之企業(yè)應用與發(fā)展.ContentIntroduction to Telecommunications3G Licenses AuctionUMTS WCDMAWireless ApplicationsVoIP & its ImplementationConclusions.Cellular Phone Generations1G: AMPS (Advanced Mobile Phone System) = analog system2G: GSM (Global System for Mobile communication) = digital system2.

2、5G: GPRS (General Packet Radio System)3G: IMT-2000 (International Mobile Telecommunication for years 2000).Digital Services Vision032649.61281443842,0001G2G3GVoiceText MessagingVideo StreamingStill ImagingAudio StreamingData Transmission Speed - k bps ElectronicNewspaperRemoteMedical Service(Medical

3、 image) Video Conference(High quality)Telephone (Voice)Voice MailFax ElectronicPublishing Video on Demand:Sports, News Weather Karaoke Video Conference(Lower quality)JPEG Still PhotosMobile RadioViideo Surveillance,Video Mail, TravelImageAudioVoice-driven Web PagesStreaming AudioDataWeather, Traffic

4、, News,Sports, Stock updatesMobile TVE-CommerceSource: Motorola.Mobile Communication Evolution.Mobile Phone Standards.Network evolution convergence.2G to 3G evolution.3G執(zhí)照-歐洲資料.臺灣3G 執(zhí)照拍賣執(zhí)照：遠致電信，101.69億元執(zhí)照B：聯(lián)邦電信，77億元 執(zhí)照C：臺灣大哥大，102.81億元執(zhí)照D：中華電信，101.79億元執(zhí)照E：亞太行動寬頻，105.7億元總計：488.99億元.臺灣3G 執(zhí)照拍賣(續(xù))執(zhí)照：2 x

5、15MHz (19201935MHz ; 21102125MHz) + 5MHz (19151920MHz)執(zhí)照B：2 x 10MHz (19351945MHz ; 21252MHz) + 5MHz (20212021MHz)執(zhí)照C：2 x 15MHz (19451960MHz ; 22150MHz) + 5MHz (20212020MHz)執(zhí)照D：2 x 15MHz (19601975MHz ; 21502165MHz) + 5MHz (20202025MHz)執(zhí)照E：2 x 20MHz (825845MHz ; 870890MHz).3G 拍賣趨勢.1Q 2000 2Q 2000 3Q 2

6、000 4Q 2000 1H2001 2H2001LiechtensteinSpainUKJapanNetherlandsGermanyItalyAustriaNorwaySwitzerlandSwedenPortugalFinlandFrance5 x WCDMA6 x WCDMA2 x WCDMA1 x CDMA20001 x WCDMA4 x WCDMA4 x WCDMA5 x WCDMA5 x WCDMA4 x WCDMA4 x WCDMA4 x WCDMA6 x WCDMAS. Korea5 x WCDMA2 x WCDMA1 x CDMA2000DenmarkGreeceIrela

7、ndHong KongTaiwanCzechBelgium3 x WCDMA73 WCDMA licences awarded plus more to come (120 by end 2001)Vs13 CDMA2000 networks planned (out of which 2 already opted for WCDMA)AustraliaNew ZealandSingapore4 x WCDMA4 x WCDMA5 x WCDMA.GPRS Network115 kbps using 8 time slotsSGSN: Serving GPRS Support Node 電路

8、交換封包交換GPRS 中心InternetGPRS 骨幹 IP 網(wǎng)路MSCBSCSGSNGGSNBTS網(wǎng)路開始有效時間: 3Q 2000PSTN.3G Network384 kbps 2 Mbps電路交換封包交換GPRS 中心PSTNInternetGPRS 骨幹 IP 網(wǎng)路MSCBSCSGSNGGSNBTSRNCBTS.Mobile multimedia streaming.PDA handset.FDD: frequency division duplex Uplink and downlink frequencies are difference and a enough frequen

9、cy spacing must be exist. 17101785 MHz18051880 MHz.TDD: time division duplexUplink and downlink use the same frequency, but transmit signals at different time.18951918 MHz18951918 MHz.FDMA: frequency division multiple accessUsers use different frequency carriers200 kHz/channel for GSM Channel #1Chan

10、nel #2.TDMA: time division multiple accessEach carrier can contain many users, but they use the same carrier at different time slots.channel #1time slot #1channel #1time slot #2.TDMA/TDDPHS from JapanCarrier spacing is 300 kHzT1T2T3T4R1R2R3R4UplinkdownlinktimeCchCchUser 1User 2User 3User 1User 2User

11、 3.TDMA/FDDGSMCarrier spacing is 200 kHzEach carrier contains 8 usersT1T2T3T4T5T6T7T8R1R2R3R4R5R6R7R8uplinkfrequencydownlinkfrequency.CDMA: code division multiple access.Wireless ApplicationsPerson-to-person (communications) services Mobile E-commerce services: video 1 and 2Travel/location based ser

12、vicesRemote diagnostics Telemetry servicesMobile office (business) services Entertainment/leisure services: video 1 and 2.Conclusions3G will provide wide range of voice and non-voice service including circuit/packet switching and multimedia service.It is possible for 3G to create new applications in

13、 a cost-effective manner.Mobile and the Internet will be the major demand drivers for the future.VoIP網(wǎng)際網(wǎng)路電.Skype官方網(wǎng)站:skype/languagehtml臺灣PCHOME說明:skype.pchome.tw/index.htm假設有需求經常打長途電話或國際電話的人,這玩意應該很實用.安裝容易以後國際電話公司能夠要去喝西北風了.VoIP.網(wǎng)友評論:*最近很紅的一個對談軟體Skype(繁體中文語言包)用了P2P技術, 過防火牆後還是超級清楚, 美東與臺灣連線時對方說話就像坐在正對面一樣, 讓我徹底對網(wǎng)路語音軟體改觀, 想想以前用yahoo messenger或MSN那種模糊延遲的語音真是好笑.然後因為它免費又太清楚, 介紹親友後我已經很久沒花錢打國際電話了.*明晰度一級棒，即時通和MSN根本無法比??！並且即時通和MS