基于時域改進的異構(gòu)網(wǎng)絡(luò)干擾管理研究
發(fā)布時間：2019-01-06 07:30
【摘要】：近年來,由于移動互聯(lián)網(wǎng)的迅猛發(fā)展以及城鎮(zhèn)人口數(shù)量的快速增長,人們對通信業(yè)務的需求量與日俱增,這也就導致了在地域上通信熱區(qū)、通信盲區(qū)會出現(xiàn)越來越多。正因為這樣,傳統(tǒng)的宏基站“補盲、補熱”的方式,不僅對運營商造成了巨大的成本壓力,也會造成現(xiàn)有的基站之間出現(xiàn)十分強烈的干擾。在LTE-A系統(tǒng)中,引入低功率節(jié)點組成異構(gòu)網(wǎng)絡(luò),改變了傳統(tǒng)的網(wǎng)絡(luò)拓撲結(jié)構(gòu),能夠有效改善系統(tǒng)的吞吐量情況。但是,隨著低功率節(jié)點部署量的增加,異構(gòu)網(wǎng)絡(luò)中會出現(xiàn)嚴重的同層和跨層干擾。在本文中,重點研究Macro-Pico情境下的異構(gòu)網(wǎng)絡(luò)干擾問題。Pico基站的作用是為了“補盲、補熱”,其中“補熱”的Pico因為受到來自Macro的強烈干擾導致非常少的用戶接入量,這樣不能達到的“補熱”的目的。應用CRE技術(shù)可以使得更多的用戶接入到Pico,然而,對于那些處在了Pico擴展區(qū)域內(nèi)的用戶來說,它會受到來自Macro基站嚴重的干擾,信道質(zhì)量會變得很差,同時吞吐量也會下降。基于異構(gòu)網(wǎng)絡(luò)存在的這類干擾問題,本文重點研究了基于LP-ABS的e ICIC技術(shù),提出一種自適應配置的LP-ABS方案和一種Co MP與LP-ABS結(jié)合的干擾協(xié)調(diào)方案。在論文的開篇,介紹了LTE-A異構(gòu)網(wǎng)絡(luò)中的一些重點技術(shù),分析了LTE-A異構(gòu)網(wǎng)絡(luò)存在的干擾問題,干擾場景。然后,對CRE技術(shù)和e ICIC技術(shù)進行了簡要分析,搭建了異構(gòu)網(wǎng)絡(luò)仿真平臺。在論文的第三章,介紹了時域e ICIC中的LP-ABS技術(shù),仿真分析了不應用e ICIC與應用LP-ABS與CRE結(jié)合的技術(shù)下,用戶吞吐量的情況。提出了一種自適應的LP-ABS技術(shù),仿真分析了固定配置和自適應的LP-ABS技術(shù)對系統(tǒng)性能的影響。在異構(gòu)網(wǎng)絡(luò)中只采用LP-ABS技術(shù),還是會存在一些干擾問題亟待解決。所以,在論文中提出一種Co MP和LP-ABS結(jié)合的干擾協(xié)調(diào)方案。該方案根據(jù)用戶受干擾程度,將Macro基站進行區(qū)域劃分,根據(jù)中心區(qū)域的用戶Io T值對用戶進行功率分配,并應用Co MP技術(shù)進行協(xié)作傳輸,對處于邊緣區(qū)域的用戶應用自適應LP-ABS技術(shù)。仿真對比不采用任何干擾協(xié)調(diào)技術(shù),只采用自適應LP-ABS技術(shù)以及Co MP和LP-ABS結(jié)合方案下系統(tǒng)的性能情況。通過仿真結(jié)果看到結(jié)合方案在不影響宏基站中心用戶性能的情況下,提高了宏基站邊緣用戶、Pico基站用戶以及小區(qū)吞吐量。
[Abstract]:In recent years, with the rapid development of mobile Internet and the rapid growth of urban population, the demand for communication services is increasing day by day, which leads to more and more communication hot areas in the region, communication blind areas will appear more and more. Because of this, the traditional method of "blind compensation, heating compensation" not only causes huge cost pressure to operators, but also causes very strong interference between existing base stations. In LTE-A systems, the introduction of low power nodes to form heterogeneous networks changes the traditional network topology, and can effectively improve the throughput of the system. However, with the increase of low power node deployment, there will be serious peer and cross-layer interference in heterogeneous networks. In this paper, we focus on the problem of heterogeneous network interference in Macro-Pico. The function of Pico base station is to "compensate for blindness and heat", in which the "heating" Pico is subjected to strong interference from Macro, resulting in very little access to users. This cannot achieve the goal of "replenishing heat". The application of CRE technology can make more users access to the Pico,. However, for those in the Pico extension area, it will be seriously interfered from the Macro base station, the channel quality will become poor, and the throughput will decline. Based on this kind of interference problem in heterogeneous networks, this paper focuses on the e ICIC technology based on LP-ABS, and proposes an adaptive LP-ABS scheme and an interference coordination scheme combining Co MP and LP-ABS. At the beginning of this paper, some key technologies in LTE-A heterogeneous network are introduced, and the interference problems and interference scenes in LTE-A heterogeneous network are analyzed. Then, the CRE technology and e ICIC technology are briefly analyzed, and the heterogeneous network simulation platform is built. In the third chapter, the LP-ABS technology in time domain e ICIC is introduced, and the user throughput is simulated and analyzed under the combination of e ICIC and LP-ABS and CRE. An adaptive LP-ABS technique is proposed. The effects of fixed configuration and adaptive LP-ABS technology on the system performance are simulated and analyzed. Only using LP-ABS technology in heterogeneous networks, there are still some interference problems to be solved. Therefore, a new interference coordination scheme combining Co MP and LP-ABS is proposed in this paper. According to the interference degree of the user, the Macro base station is divided into regions, the power is allocated according to the Io T value of the central area, and the cooperative transmission is carried out by using the Co MP technology. Adaptive LP-ABS technology is applied to users in edge area. The simulation results show that no interference coordination technique is used, only adaptive LP-ABS technology and the performance of the system under the combination of Co MP and LP-ABS are adopted. The simulation results show that the proposed scheme can improve the throughput of Acer station edge users, Pico base station users and cell throughput without affecting the performance of Acer station central users.
【學位授予單位】：吉林大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TN929.5
[Abstract]:In recent years, with the rapid development of mobile Internet and the rapid growth of urban population, the demand for communication services is increasing day by day, which leads to more and more communication hot areas in the region, communication blind areas will appear more and more. Because of this, the traditional method of "blind compensation, heating compensation" not only causes huge cost pressure to operators, but also causes very strong interference between existing base stations. In LTE-A systems, the introduction of low power nodes to form heterogeneous networks changes the traditional network topology, and can effectively improve the throughput of the system. However, with the increase of low power node deployment, there will be serious peer and cross-layer interference in heterogeneous networks. In this paper, we focus on the problem of heterogeneous network interference in Macro-Pico. The function of Pico base station is to "compensate for blindness and heat", in which the "heating" Pico is subjected to strong interference from Macro, resulting in very little access to users. This cannot achieve the goal of "replenishing heat". The application of CRE technology can make more users access to the Pico,. However, for those in the Pico extension area, it will be seriously interfered from the Macro base station, the channel quality will become poor, and the throughput will decline. Based on this kind of interference problem in heterogeneous networks, this paper focuses on the e ICIC technology based on LP-ABS, and proposes an adaptive LP-ABS scheme and an interference coordination scheme combining Co MP and LP-ABS. At the beginning of this paper, some key technologies in LTE-A heterogeneous network are introduced, and the interference problems and interference scenes in LTE-A heterogeneous network are analyzed. Then, the CRE technology and e ICIC technology are briefly analyzed, and the heterogeneous network simulation platform is built. In the third chapter, the LP-ABS technology in time domain e ICIC is introduced, and the user throughput is simulated and analyzed under the combination of e ICIC and LP-ABS and CRE. An adaptive LP-ABS technique is proposed. The effects of fixed configuration and adaptive LP-ABS technology on the system performance are simulated and analyzed. Only using LP-ABS technology in heterogeneous networks, there are still some interference problems to be solved. Therefore, a new interference coordination scheme combining Co MP and LP-ABS is proposed in this paper. According to the interference degree of the user, the Macro base station is divided into regions, the power is allocated according to the Io T value of the central area, and the cooperative transmission is carried out by using the Co MP technology. Adaptive LP-ABS technology is applied to users in edge area. The simulation results show that no interference coordination technique is used, only adaptive LP-ABS technology and the performance of the system under the combination of Co MP and LP-ABS are adopted. The simulation results show that the proposed scheme can improve the throughput of Acer station edge users, Pico base station users and cell throughput without affecting the performance of Acer station central users.
【學位授予單位】：吉林大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TN929.5
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