【正文】 ................................................................. 49 快速頻道獲取 /切換 ........................................................................ 50 高效的傳送協(xié)議 .............................................................................. 50 靈活的帶寬要求 .............................................................................. 51 支持單頻組網(wǎng) .................................................................................. 51 業(yè)務(wù)能力 .............................................................................................. 52 廣域和局域內(nèi)容共存 ...................................................................... 52 實時、非實時節(jié)目與點播短片共存 .............................................. 52 面向各個節(jié)目流的 QoS 控制 ........................................................ 52 靈活的接收選擇 .............................................................................. 53 良好的用戶體驗 .............................................................................. 53 標準的節(jié)目源接口 .......................................................................... 53 設(shè)備成熟度和產(chǎn)業(yè)鏈 .......................................................................... 53 標準化情況 .......................................................................................... 54 設(shè)備和建網(wǎng)成本分析 .......................................................................... 54 市場應(yīng)用和業(yè)務(wù)開展情況 .................................................................. 54 專利授權(quán) .............................................................................................. 55 BCAST......................................................................................................... 55 BCAST 概述 ............................................................................................. 55 BCAST 架構(gòu)體系和技術(shù)協(xié)議 ................................................................. 57 BCAST 關(guān)鍵技術(shù)點和獲益 ..................................................................... 58 音視頻編解碼技術(shù) .......................................................................... 58 業(yè)務(wù)導(dǎo)航 (Service Guide)技術(shù) ........................................................ 58 內(nèi)容保護技術(shù) .................................................................................. 58 業(yè)務(wù)鑒權(quán)、計費實現(xiàn)方式 .............................................................. 58 第 4 頁 共 頁 OMA BCAST 系列規(guī)范 ........................................................................... 59 移動廣播業(yè)務(wù)需求文檔 (RD) ......................................................... 59 移動廣播業(yè)務(wù)架構(gòu)文檔 (AD) ......................................................... 63 移動廣播業(yè)務(wù)規(guī)范 .......................................................................... 66 移動廣播業(yè)務(wù)指南 規(guī)范 .................................................................. 67 移動廣播業(yè)務(wù)文件和流媒體分發(fā)規(guī)范 .......................................... 67 移動廣播業(yè)務(wù)和內(nèi)容保護規(guī)范 ...................................................... 68 OMA BCAST 和承載技術(shù)的適配規(guī)范 .......................................... 74 BCAST 規(guī)范的時間表和進展 ................................................................. 75 MBMS.......................................................................................................... 76 網(wǎng)絡(luò)架構(gòu) .............................................................................................. 76 關(guān)鍵技術(shù) .............................................................................................. 76 技術(shù)特點 .......................................................................................... 76 協(xié)議棧 .............................................................................................. 77 無線鏈路層主要技術(shù) ...................................................................... 78 MBMS 流程 ..................................................................................... 78 業(yè)務(wù)能力 .............................................................................................. 79 設(shè)備成熟度和產(chǎn)業(yè)鏈 .......................................................................... 80 標準化情況 .......................................................................................... 80 設(shè)備和建網(wǎng)成本分析 .......................................................................... 80 市場應(yīng)用和業(yè)務(wù)開展情況 .................................................................. 81 專利情況和收費模式 .......................................................................... 81 BCMCS（中興、高通） ............................................................................ 81 清華 DMBT................................................................................................ 81 網(wǎng)絡(luò)架構(gòu) .............................................................................................. 81 關(guān)鍵技術(shù) .............................................................................................. 81 物理層 .............................................................................................. 82 數(shù)據(jù)鏈路層 ...................................................................................... 84 網(wǎng)絡(luò)層 .............................................................................................. 85 應(yīng)用層 .............................................................................................. 85 小節(jié) .................................................................................................. 85 業(yè)務(wù)能力 .............................................................................................. 86 業(yè)務(wù)性能 .......................................................................................... 86 無線性能 .......................................................................................... 87 組網(wǎng)能力 .......................................................................................... 88 設(shè)備成熟度和產(chǎn)業(yè)鏈 .......................................................................... 88 設(shè)備成熟程度 .................................................................................. 88 產(chǎn)業(yè)鏈的支持情況 .......................................................................... 89 標準化情況 ......................