本文關鍵詞： TD-LTE TDD LTE 網(wǎng)絡優(yōu)化　出處：《山東大學》2017年碩士論文　論文類型：學位論文

【摘要】：LTE(LongTerm Evolution)即長期演進,與3G技術相比,不但可以將用戶的上網(wǎng)速率由原來的1.5M左右提升到100M,而且能夠在時延、誤碼率等方面增強用戶的感知效果,隨時隨地的和任何終端進行聯(lián)系是移動通信發(fā)展的最終追求[1]。移動通信已邁入4G時代,"智慧城市"、"萬物互聯(lián)"、"超腦工程"等等新興產(chǎn)業(yè)的崛起無不依賴著無線網(wǎng)絡的發(fā)展,而TD-LTE的發(fā)展水平與質量便直接影響著全球無線互聯(lián)網(wǎng)的發(fā)展進程。3G時代主要使用的是CDMA技術,而TD-LTE則采用的是Orthogonal Frequency Division Multiplexing(OFDM)技術、Multiple-Input Multiple-Output(MIMO)技術[2]、高階調(diào)制技術以及網(wǎng)絡架構扁平化等多項前沿技術,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技術能夠實現(xiàn)在多個相互獨立的通道上進行多路空間傳輸,可以獲得更高的傳輸速率和更可靠的傳輸質量。高階調(diào)制技術可以將3G系統(tǒng)中的頻譜使用效率提升一半,這是因為它的最高調(diào)制為64QAM,即每個調(diào)制符號比3G系統(tǒng)中可多攜帶2比特信息。頻域多址技術可以更加靈活的處理多個系統(tǒng)寬帶。頻域調(diào)度可以通過OFDMA實現(xiàn),而CDMA無法實現(xiàn)。HARQ融合了自動重傳的高穩(wěn)定性和FEC的高效性。對于小區(qū)干擾,有更加靈活的方法提供相應的抑制或解決效果。論文的具體工作如下:1、分析研究了 TD-LTE網(wǎng)絡的關鍵技術及技術特征,從規(guī)劃建設、優(yōu)化特點、網(wǎng)絡集中優(yōu)化管理等方面詳細闡述了 TD-LTE網(wǎng)絡優(yōu)化的新思路。2、調(diào)查研究了 TD-LTE網(wǎng)絡的發(fā)展背景及關鍵技術。3、介紹了 TD-LTE網(wǎng)絡在規(guī)劃建設環(huán)節(jié)中,宏站和室分站的規(guī)劃思路。并闡述了 TD-LTE網(wǎng)絡基于多網(wǎng)協(xié)同建設的規(guī)劃思路。4、研究了 TD-LTE網(wǎng)絡主要優(yōu)化的內(nèi)容及相關考核指標。并從初始優(yōu)化、單站驗證、蔟優(yōu)化及專項優(yōu)化等方面提出了新的思路。5、提出了網(wǎng)絡集中優(yōu)化管理系統(tǒng),并從實施流程、內(nèi)容及主要工作等方面進行了詳細闡述。6、結合實際TD-LTE網(wǎng)絡優(yōu)化案例,從七個不同類別的網(wǎng)絡問題出發(fā),提出了具體的優(yōu)化方案,并進行了現(xiàn)場實測,用實際指標驗證TD-LTE網(wǎng)絡優(yōu)化后給用戶體驗帶來的良好感知。7、最后,對本文工作做了總結,對TD-LTE網(wǎng)絡發(fā)展以及基于無線網(wǎng)絡的智慧城市及相關行業(yè)發(fā)展進行了展望。
[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.
【學位授予單位】：山東大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TN929.5

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