本文選題：LTE-A + 異構(gòu)網(wǎng)絡(luò)　； 參考：《南京郵電大學》2017年碩士論文

【摘要】：移動通信和互聯(lián)網(wǎng)的快速發(fā)展,用戶對于數(shù)據(jù)業(yè)務(wù)的需求日益增加,在這些業(yè)務(wù)中其中很大部分的業(yè)務(wù)是發(fā)生在室內(nèi)的。由于室內(nèi)存在著很大的穿墻損耗,為了提高用戶的性能,LTE-A系統(tǒng)中引入了異構(gòu)網(wǎng)絡(luò),即將宏基站與低功率節(jié)點組合的網(wǎng)絡(luò)。雖然異構(gòu)網(wǎng)絡(luò)能夠提高整個網(wǎng)絡(luò)的容量,但是宏基站與低功率節(jié)點間的干擾問題卻大大影響著用戶的性能。為此3GPP組織提出了增強型小區(qū)間干擾協(xié)調(diào)技術(shù),包括了幾乎全空白子幀技術(shù)和RE偏置技術(shù),大大提高了異構(gòu)網(wǎng)絡(luò)的性能。在現(xiàn)實場景中,Macro-Pico的異構(gòu)網(wǎng)絡(luò)場景是應(yīng)用最廣泛的,其存在的干擾問題也是比較復雜的。本文針對Macro-Pico的異構(gòu)場景,分析了網(wǎng)絡(luò)中主要的干擾問題,并對網(wǎng)絡(luò)中的干擾問題進行了分析研究。具體的研究和創(chuàng)新如下。在Macro-Pico異構(gòu)網(wǎng)絡(luò)中,增強型小區(qū)間干擾協(xié)調(diào)技術(shù)主要采用基于ABS技術(shù)和RE偏置技術(shù)的時域干擾協(xié)調(diào)技術(shù)。本文對特定的Macro-Pico異構(gòu)網(wǎng)絡(luò)進行組網(wǎng)建模,分析了ABS子幀技術(shù)和RE偏置技術(shù)對網(wǎng)絡(luò)中干擾的改善情況,并給出了比較合理的ABS模式和RE偏置值的范圍。該分析工作對實際中網(wǎng)絡(luò)情景的RE偏置值和ABS比例的設(shè)置有一定的參考意義。在采用了增強型小區(qū)間干擾協(xié)調(diào)技術(shù)的Macro-Pico異構(gòu)網(wǎng)絡(luò)中,Pico擴展區(qū)用戶受到了Macro基站強烈的下行干擾。針對該問題,本文提出了將自適應(yīng)天線陣列技術(shù)與增強型小區(qū)間干擾協(xié)調(diào)技術(shù)相結(jié)合的方案。對該方案進行了建模仿真,結(jié)果顯示添加了自適應(yīng)天線陣列的方案在保證了整個小區(qū)網(wǎng)絡(luò)性能的前提下,對Pico擴展區(qū)用戶的吞吐量有了提升。
[Abstract]:With the rapid development of mobile communication and Internet, users' demand for data services is increasing day by day. Most of these services occur indoors. In order to improve the performance of users, heterogeneous networks are introduced into the LTE-A system, that is, the combination of Acer stations and low power nodes. Although heterogeneous networks can improve the capacity of the whole network, the interference problem between Acer stations and low power nodes greatly affects the performance of users. In order to improve the performance of heterogeneous networks, 3GPP proposes enhanced inter-cell interference coordination techniques, including almost all blank subframes and RE bias technologies. Macro-Pico 's heterogeneous network scenario is the most widely used in the real world, and its interference problem is complex. In this paper, the main interference problems in Macro-Pico are analyzed, and the interference problems in the network are analyzed. Specific research and innovation are as follows. In Macro-Pico heterogeneous networks, the enhanced inter-cell interference coordination technology mainly adopts the time-domain interference coordination technology based on ABS technology and RE bias technology. In this paper, the network modeling of a specific Macro-Pico heterogeneous network is carried out, and the improvement of interference in the network by ABS subframe technology and RE bias technology is analyzed, and the reasonable ABS mode and the range of RE bias values are given. This work has some reference significance for setting RE bias value and ABS ratio of network scene in practice. In the Macro-Pico heterogeneous network with enhanced inter-cell interference coordination technology, the Macro base station strongly interferes with the users in the extension area. In order to solve this problem, a scheme of combining adaptive antenna array technology with enhanced inter-cell interference coordination technique is proposed in this paper. The simulation results show that the scheme with adaptive antenna array can improve the throughput of Pico extension users on the premise of ensuring the performance of the whole cell network.
【學位授予單位】：南京郵電大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TN929.5

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本文編號：1824389