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【正文】 新能力 New Mobile Access 2022/2/12 14 A M P SV o i c eS e r v i c eT r a c kC D M AI S 9 5C D M A2 0 0 04 GE T A C S G S MW C D M A1 s t G e n e r a t i o nA n a l o g2 n d G e n e r a t i o nD i g i t a l3 r d G e n e r a t i o nW i d e b a n dF i x e dC o m p u t e rN e t w o r kW L A NO F D M /? ?N o r t hA m e r i c aE u r o p eD a t aS e r v i c eT r a c kV o i c e amp。 forward ? playback Content Micro BS BTS UMTS/GSM CDMA2022 Wireless Backbone and Gateways Location Services IP Network 2022/2/12 9 Drivers of 3G Beyond 3G evolution …but difficult ? to extend to higher data rate with CDMA only technology。2022/2/12 1 數(shù)字無(wú)線傳輸 寬帶無(wú)線與多媒體中心 王德勝 2022 2022/2/12 2 第 1章 概論 引言 ☆移動(dòng)通信已成為當(dāng)代通信領(lǐng)域內(nèi)發(fā)展?jié)摿ψ畲?、市?chǎng)前景最廣的熱點(diǎn)技術(shù)， ☆移動(dòng)通信用戶的增長(zhǎng)遠(yuǎn)遠(yuǎn)超過了人們的預(yù)期， ☆未來(lái)的無(wú)線便攜終端數(shù)量會(huì)超過目前計(jì)算機(jī)聯(lián)網(wǎng)的數(shù)量， ☆其業(yè)務(wù)也從面向語(yǔ)音通信轉(zhuǎn)變?yōu)槊嫦蚨嗝襟w數(shù)據(jù)通信 2022/2/12 3 展望 ☆高頻譜效率 ☆高功率效率 ☆高性價(jià)比 ☆高質(zhì)量的服務(wù)體系：扁平、透明、按需區(qū)分服務(wù) 2022/2/12 4 ☆傳輸方式變化 ☆ 交換方式變化 ☆服務(wù)內(nèi)容變化 ☆用戶容量增大 ☆覆蓋范圍與全球漫游 ☆效率提高 1G到 4G的發(fā)展 2022/2/12 5 European research on 3G started in 1989 within the RACE I program and 1991 in RACE II European research on systems beyond 3G started in 1999 within the IST program 1980s 1990s 2022s 2022s 1G+ 1G 2G+ 2G 3G+ 3G Beyond 3G+ Beyond 3G Analog Wideband Digital ??? Digital European research on 3G continued in 1995 within the ACTS program Framework Program 6 on future systems full mercial deployment trials standardisation research Evolution of mobile munication systems 2022/2/12 6 Wireless data already be introduced in second generation mobile First Generation ? Analogue ? Circuit switched ? Basic voice telephony ? Low capacity ? Limited local and regional coverage Second Generation ? Digital ? Circuit switched ? Voice plus basic data applications ? Low data speed ? Enhancements towards ? packet switching ? higher data rates ? Transnational and global roaming ? Digital ? Packet and circuit switched ? Advanced data (multimedia) applications ? Fast data access ? Global coverage ? Global roaming Third Generation Beyond Third Generation ? Digital ? Packet switched ? All IP based (IPv6) ? More advanced multimedia applications ? User in control ? Flexible platform of plementary access systems ? High speed data ? Improved QoS ? Global coverage ? Global roaming Paradigm shift from 1st generation towards beyond 3G 2022/2/12 7
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