TD-LTE網(wǎng)絡(luò)室內(nèi)部署技術(shù)的研究
發(fā)布時間：2018-09-05 12:20
【摘要】：TD-LTE是一種專門為移動高寬帶應用而設(shè)計、具有核心自主知識產(chǎn)權(quán)的TDD模式的LTE標準,具有有效利用零散頻譜,靈活支持非對稱業(yè)務(wù)等優(yōu)勢。 隨著數(shù)據(jù)業(yè)務(wù)特別是室內(nèi)數(shù)據(jù)業(yè)務(wù)的快速增長,傳統(tǒng)的宏蜂窩小區(qū)難以滿足室內(nèi)用戶的業(yè)務(wù)需求。室內(nèi)部署技術(shù)通過在室內(nèi)部署小功率節(jié)點(包括Femto和DAS),與原有網(wǎng)絡(luò)構(gòu)成異構(gòu)網(wǎng)絡(luò),解決室內(nèi)網(wǎng)絡(luò)的覆蓋和容量問題。而如何在復雜網(wǎng)絡(luò)環(huán)境部署并評估室內(nèi)技術(shù),則是亟待解決的問題,也是本文的研究內(nèi)容。 首先,對實際城區(qū)室內(nèi)場景進行了三維建模。以往室內(nèi)部署技術(shù)的研究基于二維規(guī)則網(wǎng)絡(luò)模型,無法正確建模高度對網(wǎng)絡(luò)性能的影響。三維建�？紤]高度對地圖、用戶分布、傳播損耗、天線增益等各方面的影響,還原網(wǎng)絡(luò)的真實特性。 其次,研究了TD-LTE網(wǎng)絡(luò)室內(nèi)部署技術(shù)下行容量和室內(nèi)部署算法。理論推導了Femto和DAS兩種室內(nèi)部署技術(shù)的下行容量；針對室內(nèi)小功率節(jié)點部署數(shù)量大,計算復雜度高特點,設(shè)計了基于用戶分布(算法1)和基于中斷用戶分布(算法2)的兩種快速部署算法。兩種算法分別以一定區(qū)域內(nèi)用戶分布數(shù)量和中斷用戶分布數(shù)量為優(yōu)先級部署基站,目標是降低整個網(wǎng)絡(luò)的中斷率。 最后,利用室內(nèi)部署算法設(shè)計了多種室內(nèi)部署方案,并對部署方案以及部署算法進行了大量的仿真。結(jié)果表明,在以網(wǎng)絡(luò)中斷率為關(guān)鍵性能指標的網(wǎng)絡(luò)演進中,室內(nèi)部署技術(shù)相對室外部署技術(shù)、DAS部署技術(shù)相對Femto部署技術(shù)、三種異構(gòu)網(wǎng)絡(luò)部署技術(shù)相對兩種異構(gòu)網(wǎng)絡(luò)部署技術(shù)能更有效的提高網(wǎng)絡(luò)性能；兩種部署算法均能在保證降低中斷率前提下有效的提高網(wǎng)絡(luò)覆蓋和容量特性,其中算法1比算法2能更有效的提高網(wǎng)絡(luò)吞吐量,算法2比算法1能更有效的降低網(wǎng)絡(luò)中斷率。
[Abstract]:TD-LTE is a TDD standard specially designed for mobile high broadband applications with core independent intellectual property rights. It has the advantages of efficient use of scattered spectrum and flexible support of asymmetric services. With the rapid growth of data services, especially indoor data services, it is difficult for traditional macrocellular areas to meet the needs of indoor users. Indoor deployment technology solves the problem of indoor network coverage and capacity by deploying small power nodes (including Femto and DAS),) into heterogeneous networks. How to deploy and evaluate indoor technology in complex network environment is an urgent problem, and is also the research content of this paper. Firstly, three-dimensional modeling of indoor scene in actual urban area is carried out. Previous researches on indoor deployment technology were based on two-dimensional regular network model, which could not correctly model the influence of height on network performance. The 3D modeling takes into account the influence of height on map, user distribution, propagation loss, antenna gain and so on, so as to restore the real characteristics of the network. Secondly, the downlink capacity and indoor deployment algorithm of TD-LTE network indoor deployment technology are studied. The downlink capacity of two indoor deployment technologies, Femto and DAS, is derived theoretically. Two fast deployment algorithms based on user distribution (algorithm 1) and interrupt user distribution (algorithm 2) are designed. The two algorithms take the number of users distribution and the number of interrupt users as priority to deploy the base station respectively. The goal of the two algorithms is to reduce the outage rate of the whole network. Finally, various indoor deployment schemes are designed by using indoor deployment algorithms, and a large number of simulations are carried out on deployment schemes and deployment algorithms. The results show that in the evolution of the network with network outage rate as the key performance index, the indoor deployment technology is relative to the outdoor deployment technology, and the Das deployment technology is relative to the Femto deployment technology. Three kinds of heterogeneous network deployment techniques can improve network performance more effectively than two heterogeneous network deployment technologies, and both deployment algorithms can effectively improve network coverage and capacity characteristics under the premise of reducing interrupt rate. Algorithm 1 can improve network throughput more effectively than algorithm 2, and algorithm 2 can reduce network outage rate more effectively than algorithm 1.
【學位授予單位】：北京交通大學
【學位級別】：碩士
【學位授予年份】：2013
【分類號】：TN929.5
本文編號：2224251
[Abstract]:TD-LTE is a TDD standard specially designed for mobile high broadband applications with core independent intellectual property rights. It has the advantages of efficient use of scattered spectrum and flexible support of asymmetric services. With the rapid growth of data services, especially indoor data services, it is difficult for traditional macrocellular areas to meet the needs of indoor users. Indoor deployment technology solves the problem of indoor network coverage and capacity by deploying small power nodes (including Femto and DAS),) into heterogeneous networks. How to deploy and evaluate indoor technology in complex network environment is an urgent problem, and is also the research content of this paper. Firstly, three-dimensional modeling of indoor scene in actual urban area is carried out. Previous researches on indoor deployment technology were based on two-dimensional regular network model, which could not correctly model the influence of height on network performance. The 3D modeling takes into account the influence of height on map, user distribution, propagation loss, antenna gain and so on, so as to restore the real characteristics of the network. Secondly, the downlink capacity and indoor deployment algorithm of TD-LTE network indoor deployment technology are studied. The downlink capacity of two indoor deployment technologies, Femto and DAS, is derived theoretically. Two fast deployment algorithms based on user distribution (algorithm 1) and interrupt user distribution (algorithm 2) are designed. The two algorithms take the number of users distribution and the number of interrupt users as priority to deploy the base station respectively. The goal of the two algorithms is to reduce the outage rate of the whole network. Finally, various indoor deployment schemes are designed by using indoor deployment algorithms, and a large number of simulations are carried out on deployment schemes and deployment algorithms. The results show that in the evolution of the network with network outage rate as the key performance index, the indoor deployment technology is relative to the outdoor deployment technology, and the Das deployment technology is relative to the Femto deployment technology. Three kinds of heterogeneous network deployment techniques can improve network performance more effectively than two heterogeneous network deployment technologies, and both deployment algorithms can effectively improve network coverage and capacity characteristics under the premise of reducing interrupt rate. Algorithm 1 can improve network throughput more effectively than algorithm 2, and algorithm 2 can reduce network outage rate more effectively than algorithm 1.
【學位授予單位】：北京交通大學
【學位級別】：碩士
【學位授予年份】：2013
【分類號】：TN929.5
【參考文獻】
相關(guān)期刊論文 前2條
1 祝煒凱;趙竹巖;康劍鋒;談?wù)褫x;;基于實際城區(qū)場景的TD-LTE異構(gòu)網(wǎng)絡(luò)性能研究[J];電信科學;2012年09期
2 王丙參;魏艷華;張云;;利用反函數(shù)及變換抽樣法生成隨機數(shù)[J];重慶文理學院學報(自然科學版);2011年05期
，本文編號：2224251
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