發(fā)布時間：2018-05-18 10:30

  本文選題：LTE + 語音業(yè)務��； 參考：《吉林大學》2014年碩士論文

【摘要】：移動通信的多業(yè)務化、高速化要求，促進了無線組網(wǎng)技術的不斷發(fā)展。最新的應用體現(xiàn)在LTE(Long Term Evolution)網(wǎng)絡的大規(guī)模建設和全球迅猛發(fā)展。LTE是基于數(shù)據(jù)服務的無線網(wǎng)絡，是以提供盡量大的數(shù)據(jù)吞吐量為目的，在此基礎上實現(xiàn)各種通信服務，2G和3G的發(fā)展路徑是以語音業(yè)務為基礎，進而延伸到互聯(lián)網(wǎng)業(yè)務。LTE業(yè)務的發(fā)展與其有著明顯的區(qū)別。事實上，LTE被認為是‘一步到位’且‘技術可以不斷生長’的無線數(shù)據(jù)通信平臺。為實現(xiàn)高帶寬、低延時的目的，LTE網(wǎng)絡在網(wǎng)絡結構和無線接口采用了不同于3G的技術，散失了對3G網(wǎng)絡的后向兼容性，使得新老網(wǎng)絡間的互通成為亟待解決的問題，尤其體現(xiàn)在語音服務方面。 LTE的語音解決方案也是運營商LTE網(wǎng)絡建設及終端廠家重點關注的問題。LTE網(wǎng)絡是完全基于分組域架構，，無法提供像3G WCDMA和2G GSM基于電路域的語音通話，而要實現(xiàn)全網(wǎng)VoLTE的語音解決方案，需要終端、無線和核心網(wǎng)的全面支持和優(yōu)化，需要全網(wǎng)部署IMS網(wǎng)絡，以當前技術來看其實現(xiàn)難度較大。 本文通過對現(xiàn)有2G GSM網(wǎng)和3G WCDMA網(wǎng)所能承載業(yè)務的能力、各網(wǎng)已建設基站數(shù)量及覆蓋范圍等情況的調查和分析，依據(jù)LTE的業(yè)務特點，結合目前網(wǎng)絡承載語音和數(shù)據(jù)的發(fā)展情況，對未來用戶業(yè)務進行合理分析及預測。科學預測話務分布重點、合理布局網(wǎng)絡和均衡話務量，得出LTE網(wǎng)絡需要建設的重點區(qū)域及預計承載的業(yè)務量，并對LTE原理、網(wǎng)絡架構及幾個關鍵技術進行了深入研究，在此基礎上，結合LTE試驗網(wǎng)的經(jīng)驗數(shù)據(jù)，確定LTE網(wǎng)絡的建設原則。主要研究內容如下： 在分析2G、3G和LTE網(wǎng)絡結構和信令流程的基礎上，對當前的LTE語音服務實現(xiàn)的解決方案中雙待機(SV-LTE:Simultaneous Voice and LTE)、CSFB (Circuit SwitchedFallback)和VoLTE（Voice LTE），進行了歸納比較，分析其優(yōu)劣。通過對某城市聯(lián)通LTE網(wǎng)絡語音業(yè)務解決方案設計，認為在LTE未來實現(xiàn)普遍覆蓋并全面替代3G網(wǎng)絡之前，語音回落技術（CS Fallback）是可行的方案，是在產(chǎn)業(yè)界未實現(xiàn)VoLTE時提出的一種相對較為簡單的語音解決方案。且必將在相當長的時期內保持存在。 通過對LTE實現(xiàn)語音回落的技術原理、要求等進行探討，對LTE語音業(yè)務實現(xiàn)的網(wǎng)絡結構提出了建議�；诒疚牡难芯抗ぷ骱统晒麨長TE網(wǎng)絡建設中語音業(yè)務部分，提供了技術參考，具有理論和實際工程意義。
[Abstract]:The multi-service and high-speed requirements of mobile communication promote the continuous development of wireless networking technology. The latest applications are embodied in the large-scale construction of the LTE(Long Term Evolution network and the rapid development of the world. LTE is a wireless network based on data services that aims to provide as much data throughput as possible. On this basis, the development path of various communication services such as 2G and 3G is based on voice service, and then extends to the development of Internet service. LTE has obvious difference with it. In fact, LTE is considered a 'one-step' wireless data communication platform. In order to realize the goal of high bandwidth and low delay, LTE network adopts different technology than 3G in network structure and wireless interface, and the backward compatibility of 3G network is lost, which makes the interworking between new and old networks an urgent problem to be solved. Especially in voice services. The voice solution of LTE is also the focus of LTE network construction and terminal manufacturers. LTE network is completely based on packet domain architecture, and can not provide voice calls such as 3G WCDMA and 2G GSM based on circuit domain. In order to realize the voice solution of VoLTE in the whole network, it needs the support and optimization of the terminal, wireless and core network, and the IMS network needs to be deployed in the whole network, which is difficult to realize in view of the current technology. Based on the investigation and analysis of the capacity of the existing 2G GSM network and 3G WCDMA network to carry the service, the number and coverage of the base stations built in each network, and according to the characteristics of the LTE service, combined with the development of the current network carrying voice and data, this paper analyzes the characteristics of the existing 2G GSM network and 3G WCDMA network. Reasonable analysis and forecast of future user service. Scientific prediction of traffic distribution, rational distribution of network and balanced traffic, the key areas to be constructed and the traffic volume expected to be carried out in LTE network are obtained. The principle of LTE, network architecture and several key technologies are studied in depth. On this basis, combined with the empirical data of LTE network, the construction principle of LTE network is determined. The main contents of the study are as follows: Based on the analysis of 2G 3G and LTE network structure and signaling flow, the advantages and disadvantages of SV-LTE: Simultaneous Voice and LTEX / CSFB Circuit switched Fallbackand VoLTE(Voice LTEN are summarized and compared in the current solution of LTE voice service implementation, and the advantages and disadvantages are analyzed. Based on the solution design of LTE network voice service of a certain city Unicom, it is considered that before LTE realizes universal coverage and replaces 3G network in the future, the voice fallback technology (CS Fallback) is a feasible scheme. It is a relatively simple voice solution when VoLTE is not implemented in industry. And must remain in existence for quite a long time. Based on the discussion of the technical principle and requirements of LTE to realize voice fallback, the paper puts forward some suggestions on the network structure of LTE voice service. Based on the research work and results of this paper, it provides a technical reference for the voice service in the construction of LTE network, and has theoretical and practical engineering significance.
【學位授予單位】：吉林大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TN929.5

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相關期刊論文 前3條

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2 吳瓊;朱愛華;薛楠;;CSFB部署對網(wǎng)絡的影響分析[J];電信科學;2013年09期

3 蔣佳俊;胡波;;LTE系統(tǒng)下行鏈路的一種AMC方案[J];信息與電子工程;2009年05期

本文編號：1905493