本文選題：Vo + LTE��； 參考：《蘭州交通大學(xué)》2017年碩士論文

【摘要】：近年移動通信業(yè)務(wù)飛速發(fā)展,4G網(wǎng)絡(luò)成為全球運(yùn)營商為客戶提供高速數(shù)據(jù)業(yè)務(wù)的主要承載網(wǎng)絡(luò),但語音業(yè)務(wù)依然承載在2G和3G網(wǎng)絡(luò)。隨著技術(shù)的發(fā)展,VoLTE技術(shù)應(yīng)運(yùn)而生,VoLTE即Voice over LTE,它是一種IP數(shù)據(jù)傳輸技術(shù),無需2G/3G網(wǎng)絡(luò),將語音業(yè)務(wù)承載在4G網(wǎng)絡(luò)上,可實(shí)現(xiàn)數(shù)據(jù)與語音業(yè)務(wù)在同一網(wǎng)絡(luò)下的承載。目前VoLTE技術(shù)已經(jīng)成熟,全球運(yùn)營商正在廣泛部署,意在利用4G網(wǎng)絡(luò)為客戶提供高清語音、視頻業(yè)務(wù)。2016年7月,中國移動除涉藏、涉疆外,所有區(qū)域均實(shí)現(xiàn)了VoLTE的商用,如何進(jìn)行大量的網(wǎng)絡(luò)優(yōu)化,提高業(yè)務(wù)質(zhì)量是目前運(yùn)營商網(wǎng)絡(luò)運(yùn)維工作的核心。VoLTE采用IMS作為業(yè)務(wù)控制層,EPC作為承載層,要求終端、無線網(wǎng)絡(luò)、分組域、電路域和IMS域端到端的技術(shù)配合來實(shí)現(xiàn)基于IMS的分組域語音和多媒體業(yè)務(wù)。VoLTE采用了無線承載QoS等級標(biāo)識、AMR-WEB語音編碼、SIPSDP、RoHC健壯性包頭壓縮協(xié)議、SPS半持續(xù)調(diào)度、eSRVCC等關(guān)鍵技術(shù)來保障VoLTE業(yè)務(wù)質(zhì)量。論文通過大量的現(xiàn)場實(shí)際優(yōu)化,對無線網(wǎng)絡(luò)從三個層面對VoLTE優(yōu)化進(jìn)行了方法歸納。首先,對4G網(wǎng)絡(luò)弱覆蓋和干擾的解決方法進(jìn)行了論述,歸納了基礎(chǔ)網(wǎng)絡(luò)優(yōu)化方法;其次,通過對掉話、接通、切換、RRC重建的整理,對網(wǎng)絡(luò)中關(guān)鍵事件的優(yōu)化方法進(jìn)行了梳理,形成了關(guān)鍵事件的優(yōu)化方法論;再次,對高清語音質(zhì)量經(jīng)常出現(xiàn)的MOS質(zhì)量不高和單通問題進(jìn)行了總結(jié),形成了四維八步法等優(yōu)化手段;最后,對VoLTE業(yè)務(wù)主要參數(shù)設(shè)置進(jìn)行了說明,形成了參數(shù)設(shè)置的原則。論文通過對優(yōu)化方法的總結(jié),在VoLTE商用初期提供了無線網(wǎng)絡(luò)優(yōu)化思路,在提高網(wǎng)絡(luò)優(yōu)化工作效率的同時(shí),通過典型的問題描述,給VoLTE優(yōu)化提供了大量的應(yīng)用的案例,供VoLTE優(yōu)化現(xiàn)場參考。
[Abstract]:With the rapid development of mobile communication services in recent years, 4G network has become the main carrier network for global operators to provide high-speed data services to customers, but voice services are still carried in 2G and 3G networks. With the development of technology, VoLTE (Voice over LTE,) is a kind of IP data transmission technology. It can carry voice service on 4G network without 2G/3G network, which can realize the bearing of data and voice service in the same network. At present, VoLTE technology is mature, and global operators are widely deployed to provide high-definition voice and video services to customers using 4G networks. In July 2016, China Mobile realized the commercial use of VoLTE in all regions except Tibet and Xinjiang. How to optimize a large number of networks and improve the service quality is the core of the network operation and maintenance of the operators at present. IMS is adopted as the service control layer and EPC is used as the carrier layer, which requires terminal, wireless network, packet domain. Circuit domain and IMS domain end-to-end cooperation to implement packet domain voice and multimedia services based on IMS. VoLTE adopts wireless bearer QoS class identifier AMR-Web speech coding, SIPSDPU RoHC robust header compression protocol, SPS semi-persistent scheduling, ESRVCC and so on. Technology to ensure the quality of VoLTE services. In this paper, through a lot of field optimization, the methods of VoLTE optimization in wireless network are summarized from three aspects. Firstly, the methods to solve the weak coverage and interference of 4G network are discussed, and the optimization methods of basic network are summarized. Secondly, the optimization methods of key events in the network are combed through the arrangement of dropping, connecting and switching RRC reconstruction. The optimization methodology of key events is formed. Thirdly, the problems of low MOS quality and single pass that often occur in HD speech quality are summarized, and four dimensional and eight step optimization methods are formed. Finally, The main parameter setting of VoLTE service is explained, and the principle of parameter setting is formed. Through the summary of optimization methods, this paper provides a wireless network optimization idea in the initial commercial stage of VoLTE. At the same time, it improves the efficiency of network optimization and provides a large number of application cases for VoLTE optimization through the typical problem description. For VoLTE optimization site reference.
【學(xué)位授予單位】：蘭州交通大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TN929.5

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本文編號：1917019