LTE SRVCC語音解決方案及關(guān)鍵技術(shù)探討

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目 錄
摘 要 I
ABSTRACT II
一、緒論 1
1.1 研究背景和意義 1
1.2 研究現(xiàn)狀及存在問題 2
1.3 研究目標(biāo)和內(nèi)容 4
二、LTE系統(tǒng)概述 5
2.1 LTE標(biāo)準(zhǔn)演進(jìn)過程 5
2.2 LTE網(wǎng)絡(luò)的關(guān)鍵技術(shù) 6
2.2.1 OFDM技術(shù) 6
2.2.2 MIMO技術(shù) 8
2.3 LTE的網(wǎng)絡(luò)架構(gòu) 9
三、現(xiàn)階段LTE語音解決方案概述 12
3.1 雙待機(jī)終端方案 12
3.2 CSFB語音方案 13
3.2 SRVCC語音方案 15
四、SRVCC語音方案的關(guān)鍵技術(shù)探討 16
4.1 會(huì)話持續(xù)性 16
4.1.1 IP多媒體子系統(tǒng)中IMS的會(huì)話持續(xù)性 16
4.1.2 會(huì)話持續(xù)性的范圍 17
4.2 SRVCC語音方案的網(wǎng)絡(luò)功能模塊 18
4.2.1 SRVCC語音方案的網(wǎng)絡(luò)架構(gòu) 18
4.2.2 相關(guān)網(wǎng)元 19
4.3 SRVCC語音方案的業(yè)務(wù)流程 22
4.4 SRVCC增強(qiáng)方案（eSRVCC） 24
4.5 SRVCC語音方案對(duì)現(xiàn)網(wǎng)的影響 25
4.6 小結(jié) 27
五、結(jié)論 28
致謝 29
參考文獻(xiàn) 30

摘 要
隨著移動(dòng)通信技術(shù)的迅猛發(fā)展，移動(dòng)通信寬帶化已經(jīng)成為未來通信系統(tǒng)的主要發(fā)展趨勢(shì)。LTE作為目前移動(dòng)通信系統(tǒng)的主要演進(jìn)方向，越來越受各大運(yùn)營(yíng)商的重視。
LTE 網(wǎng)絡(luò)是完全基于統(tǒng)一分組域架構(gòu)的，無法提供像3G和2G那樣基于電路域的語音通話，而要實(shí)現(xiàn)全網(wǎng) SRVCC的語音解決方案，需要全網(wǎng)部署IMS網(wǎng)絡(luò)，這在網(wǎng)絡(luò)部署前期無法實(shí)現(xiàn)的。本文在介紹了LTE網(wǎng)絡(luò)和現(xiàn)階段LTE網(wǎng)絡(luò)的各種語音解決方案，分析其優(yōu)缺點(diǎn)，探析LTE語音部署策略，并重點(diǎn)分析SRVCC語音方案的關(guān)鍵技術(shù)。在本文最后，通過對(duì)不同語音解決方案的比較分析，得出SRVCC技術(shù)必將成為L(zhǎng)TE網(wǎng)絡(luò)的最終語音解決方案。

關(guān)鍵詞：LTE；語音解決方案；SRVCC


ABSTRACT
With the rapid development of the mobile communication technology, Mobile Broadband has become the main tread of the mobile communication system. The major operators are paying more and more attention to the LTE which has become the main evolution direction of mobile communication system.
LTE network is totally based on the packet switched architecture, which cannot provide customers with voice service in the circuit switched network. We need to implement the IMS network to make the SRVCC work. However, it is impossible in the early days of the network implementation. This article introduces LTE network and several voice solutions over LTE network at the present stage, analyses advantages and disadvantages about each solution, researches the strategies of LTE voice implementation and mainly analyses the key technology of SRVCC. At last, through the comparative analysis of different voice solutions, we can conclude that SRVCC will be the final voice solution of LTE network.

Keywords: LTE; voice solution; SRVCC