【正文】 receiving 1 spreading amp。 。 。 Reference Model Definition Definition of Research amp。 “ 頻率復(fù)用 ” 的概念 特點(diǎn)：用戶容量大，服務(wù)性能較好，頻譜利用率較高，用戶終端小巧且電池 使用時(shí)間長(zhǎng)，輻射小等 問題：系統(tǒng)復(fù)雜，越區(qū)切換，漫游，位置登記；更新和管理以及系統(tǒng)鑒權(quán)等 蜂窩分類 宏蜂窩 (Macrocell) 220km 微蜂窩 (Microcell) － 2 km 微微蜂窩 (Picocell) 400m 分層蜂窩 (由多種蜂窩組成 ) 36 WTI Wireless Technology Innovation Institute 移動(dòng)通信系統(tǒng)的全球覆蓋 1 37 WTI Wireless Technology Innovation Institute 蜂窩 —頻率復(fù)用方式 FDMA 頻率復(fù)用 1 1 1 1 1 1 1 1 1 3 6 6 2 2 2 5 1 4 7 CDMA 頻率復(fù)用 38 WTI Radio tower Radio tower Radio tower Radio tower Radio tower Radio tower Radio tower Radio tower Radio tower Radio tower Radio tower Radio tower Radio tower Radio tower Radio tower Radio tower Radio tower Radio tower Radio tower Radio tower Radio tower Radio tower Radio tower Radio tower Radio tower Radio tower Radio tower Radio tower Radio tower Radio tower Radio tower Radio tower Radio tower Radio tower Radio tower Radio tower Radio tower Radio tower Radio tower Radio tower Radio tower Radio tower Radio tower Radio tower Radio tower Radio tower Radio tower Radio tower Radio tower Wireless Technology Innovation Institute FDMA—蜂窩覆蓋 Radio tower Radio tower Radio tower Radio tower Radio tower Radio tower Radio tower Radio tower Radio tower Radio tower Radio tower Radio tower Radio tower Radio tower Radio tower Radio tower Radio tower Radio tower Radio tower Radio tower Radio tower BTS BTS BTS BTS 39 WTI Radio tower Radio tower Radio tower Radio tower Radio tower Radio tower Radio tower Radio tower Radio tower Radio tower Radio tower Radio tower Radio tower Radio tower Radio tower Radio tower Radio tower Radio tower Radio tower Radio tower Radio tower Radio tower Radio tower Radio tower Radio tower Radio tower VLR MSC GMSC BSC Abis BSS Radio tower PSTN E D C AUC H HLR VLR MSC A PSTN BSC Abis BSS Radio tower A Wireless Technology Innovation Institute 移動(dòng)通信網(wǎng)絡(luò)結(jié)構(gòu) Wireless Technology Innovation Institute WTI 小區(qū)軟切換 Base 2 Base 1 Base 3 40 WTI Wireless Technology Innovation Institute SSDT ? 蜂窩系統(tǒng) 的改進(jìn) ? 同宏分集 相比 41 42 Wireless Technology Innovation Institute WTI 分布式天線系統(tǒng) CS MicroBS with TX/RX and MODEM Passive Splitter bunched 系統(tǒng) 43 WTI Wireless Technology Innovation Institute 李建業(yè)的方法 44 WTI Wireless Technology Innovation Institute 從 3G、 E3G演進(jìn)： LTE和 AIE 45 Wireless Technology Innovation Institute WTI 46 Wireless Technology Innovation Institute WTI 47 Wireless Technology Innovation Institute WTI 48 Wireless Technology Innovation Institute WTI 49 Wireless Technology Innovation Institute WTI 50 Wireless Technology Innovation Institute WTI 51 WTI Wireless Technology Innovation Institute 4G與以前的移動(dòng)通信系統(tǒng) 可能的不一樣 4G的特點(diǎn) 4G的發(fā)展現(xiàn)狀 WiMAX、 Wibro 52 Wireless Technology Innovation Institute WTI Agreed position on system capabilities for Systems Beyond IMT2022 (7th ITUR WP8F meeting) Source: ITUR WP8F 7th Meeting, Queenstown, February 27 March 5, 2022, TEMP 251r1e , like Mobility BS digital Broadcasting Terrestrial digital broadcasting ( 1 Nomadic / Local area wireless access Medium Low IMT2022 10 100 Enhanced IMT2022 IMT Systems beyond 2022 Enhancement New Elements of Systems Beyond Mobile Access High Communication speedMbit/s) denotes interconnection between systems via works or the which allows flexible use in any environments without making users aware of constituent systems. ITUR WP8F position on systems beyond IMT2022 includes plementary mobile systems 3G Evolution 53 Wireless Technology Innovation Institute WTI – 3GPP TR “ Requirements for Evolved UTRA and Evolved UTRAN” 支持更高的終端移動(dòng)速度（ 250km/h） – ITUR : “ Framework and overall objectives of the future development of IMT2022 and systems beyond IMT2022” 全 IP網(wǎng)絡(luò)架構(gòu)、承載與控制分離 – – ITUT SG13 FGNGN 3GPP TS Service requirements for an All IP Network 提供無處不在的服務(wù)、異構(gòu)網(wǎng)絡(luò)協(xié)同 – 3GPP TR “ 3GPP system architecture evolution (SAE)” 提供更為豐富的分組多媒體業(yè)務(wù) – WWRF（ MUSE） 4G 無線通信系統(tǒng)愿景 提供更高的傳輸速率（ 100M～ 1Gbps） Wireless Technology Innovation Institute WTI Evolution of mobile munication systems European research on 3G started in 1989 within the RACE I program and 1991 in RACE II 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 European research on systems beyond 3G started in 1999 within the IST program Framework Program 6 on future systems 54 full mercial deployment trials standardisation research 3G Evolution 55 Book of Visions 2022 published – Initial set of WWRF research tasks Initial system concept amp。 1998年，基于 SCDMA技術(shù)，起草了 TDSCDMA RTT，并將其提交給 ITU，作為 IMT2022 RTT的一 種侯選方案。擴(kuò)頻信號(hào)近似白噪聲，難以檢測(cè)，寬帶擴(kuò)頻信號(hào)功 率譜密度很低，難以監(jiān)聽 易于實(shí)現(xiàn)大容量多址通信 易于精確定時(shí)和測(cè)距 易于采用各種先進(jìn)的分集技術(shù)，如 RAKE接收、智能天線等 20 Wireless Technology Innovation Institute WTI 三種主流 3G標(biāo)準(zhǔn)的基本知識(shí)和特點(diǎn) 21 Wireless Technology Innovation Institute WTI IMT2022的由來 1985年提出 FPLMTS 即 Future Public Land Mobile Telemunications System 1996年正式更名為 IM