本文關(guān)鍵詞： TD-LTE TDD LTE 網(wǎng)絡(luò)優(yōu)化　出處：《山東大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

【摘要】：LTE(LongTerm Evolution)即長(zhǎng)期演進(jìn),與3G技術(shù)相比,不但可以將用戶的上網(wǎng)速率由原來(lái)的1.5M左右提升到100M,而且能夠在時(shí)延、誤碼率等方面增強(qiáng)用戶的感知效果,隨時(shí)隨地的和任何終端進(jìn)行聯(lián)系是移動(dòng)通信發(fā)展的最終追求[1]。移動(dòng)通信已邁入4G時(shí)代,"智慧城市"、"萬(wàn)物互聯(lián)"、"超腦工程"等等新興產(chǎn)業(yè)的崛起無(wú)不依賴著無(wú)線網(wǎng)絡(luò)的發(fā)展,而TD-LTE的發(fā)展水平與質(zhì)量便直接影響著全球無(wú)線互聯(lián)網(wǎng)的發(fā)展進(jìn)程。3G時(shí)代主要使用的是CDMA技術(shù),而TD-LTE則采用的是Orthogonal Frequency Division Multiplexing(OFDM)技術(shù)、Multiple-Input Multiple-Output(MIMO)技術(shù)[2]、高階調(diào)制技術(shù)以及網(wǎng)絡(luò)架構(gòu)扁平化等多項(xiàng)前沿技術(shù),其中OFDM系統(tǒng)可以將一條高速度高帶寬的數(shù)據(jù)流分割成多條并行[3]的窄帶數(shù)據(jù)流,MIMO技術(shù)能夠?qū)崿F(xiàn)在多個(gè)相互獨(dú)立的通道上進(jìn)行多路空間傳輸,可以獲得更高的傳輸速率和更可靠的傳輸質(zhì)量。高階調(diào)制技術(shù)可以將3G系統(tǒng)中的頻譜使用效率提升一半,這是因?yàn)樗淖罡哒{(diào)制為64QAM,即每個(gè)調(diào)制符號(hào)比3G系統(tǒng)中可多攜帶2比特信息。頻域多址技術(shù)可以更加靈活的處理多個(gè)系統(tǒng)寬帶。頻域調(diào)度可以通過(guò)OFDMA實(shí)現(xiàn),而CDMA無(wú)法實(shí)現(xiàn)。HARQ融合了自動(dòng)重傳的高穩(wěn)定性和FEC的高效性。對(duì)于小區(qū)干擾,有更加靈活的方法提供相應(yīng)的抑制或解決效果。論文的具體工作如下:1、分析研究了 TD-LTE網(wǎng)絡(luò)的關(guān)鍵技術(shù)及技術(shù)特征,從規(guī)劃建設(shè)、優(yōu)化特點(diǎn)、網(wǎng)絡(luò)集中優(yōu)化管理等方面詳細(xì)闡述了 TD-LTE網(wǎng)絡(luò)優(yōu)化的新思路。2、調(diào)查研究了 TD-LTE網(wǎng)絡(luò)的發(fā)展背景及關(guān)鍵技術(shù)。3、介紹了 TD-LTE網(wǎng)絡(luò)在規(guī)劃建設(shè)環(huán)節(jié)中,宏站和室分站的規(guī)劃思路。并闡述了 TD-LTE網(wǎng)絡(luò)基于多網(wǎng)協(xié)同建設(shè)的規(guī)劃思路。4、研究了 TD-LTE網(wǎng)絡(luò)主要優(yōu)化的內(nèi)容及相關(guān)考核指標(biāo)。并從初始優(yōu)化、單站驗(yàn)證、蔟優(yōu)化及專項(xiàng)優(yōu)化等方面提出了新的思路。5、提出了網(wǎng)絡(luò)集中優(yōu)化管理系統(tǒng),并從實(shí)施流程、內(nèi)容及主要工作等方面進(jìn)行了詳細(xì)闡述。6、結(jié)合實(shí)際TD-LTE網(wǎng)絡(luò)優(yōu)化案例,從七個(gè)不同類別的網(wǎng)絡(luò)問(wèn)題出發(fā),提出了具體的優(yōu)化方案,并進(jìn)行了現(xiàn)場(chǎng)實(shí)測(cè),用實(shí)際指標(biāo)驗(yàn)證TD-LTE網(wǎng)絡(luò)優(yōu)化后給用戶體驗(yàn)帶來(lái)的良好感知。7、最后,對(duì)本文工作做了總結(jié),對(duì)TD-LTE網(wǎng)絡(luò)發(fā)展以及基于無(wú)線網(wǎng)絡(luò)的智慧城市及相關(guān)行業(yè)發(fā)展進(jìn)行了展望。
[Abstract]:LTE(LongTerm Evolution is a long-term evolution, compared with 3G technology, not only can users access the Internet rate from 1.5m to 100m. Moreover, it is the ultimate pursuit of the development of mobile communication to enhance the perceived effect of the user in the aspects of delay, bit error rate and so on, and contact with any terminal at any time, anywhere and at any time. [1. Mobile communication has entered the 4G era. The rise of new industries, such as "smart city", "interconnection of everything", "superbrain engineering" and so on, all depend on the development of wireless network. The development level and quality of TD-LTE will directly affect the development of the global wireless Internet. 3G era is the main use of CDMA technology. TD-LTE uses Orthogonal Frequency Division Multiplexing OFDM (OFDM) technology. Multiple-Input Multiple-Output Mimo technique. [2, high order modulation technology and flat network architecture, among which OFDM system can divide a high speed and high bandwidth data stream into multiple parallel. [3) the narrowband data stream MIMO technology can realize multi-channel spatial transmission on multiple independent channels. Higher transmission rate and more reliable transmission quality can be achieved. High-order modulation technology can increase spectrum efficiency in 3G system by half because its maximum modulation is 64QAM. That is, each modulation symbol can carry 2 bits more information than in 3G system. Frequency domain multiple access technology can deal with multiple systems more flexibly. Frequency domain scheduling can be implemented through OFDMA. However, CDMA can not realize. HARQ combines the high stability of automatic retransmission and the high efficiency of FEC. There are more flexible methods to provide the corresponding inhibition or solution effect. The specific work of this paper is as follows: 1. The key technologies and technical characteristics of TD-LTE network are analyzed and studied, from the planning and construction, optimization characteristics. This paper expounds the new idea of TD-LTE network optimization in detail from the aspects of centralized network management, and investigates the background and key technology of TD-LTE network. This paper introduces the planning ideas of macro station and branch station in the planning and construction of TD-LTE network, and expounds the planning thinking of TD-LTE network based on multi-network cooperative construction. This paper studies the main optimization contents and relevant assessment indexes of TD-LTE network, and puts forward a new idea of 5. 5 from the aspects of initial optimization, single station verification, cocooning optimization and special optimization. Put forward the network centralized optimization management system, and from the implementation process, content and main work and other aspects of detailed elaboration. 6, combined with the actual TD-LTE network optimization case. Based on the seven different network problems, this paper puts forward the specific optimization scheme, and carries out the field measurement, and verifies the good perception of the TD-LTE network optimization to the user experience by using the actual indicators. Finally, the work of this paper is summarized, and the development of TD-LTE network, intelligent city based on wireless network and related industries are prospected.
【學(xué)位授予單位】：山東大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TN929.5

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