本文關(guān)鍵詞：LTE-A異構(gòu)網(wǎng)絡(luò)小區(qū)間干擾協(xié)調(diào)技術(shù)研究　出處：《西安電子科技大學(xué)》2014年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： LTE-A 異構(gòu)網(wǎng)絡(luò) 增強(qiáng)型小區(qū)間干擾協(xié)調(diào) ABS CoMP

【摘要】：近十幾年來,蜂窩移動通信技術(shù)迅猛發(fā)展。為了滿足人們對于移動通信的日益增長且多樣的需求,同構(gòu)網(wǎng)絡(luò)的基礎(chǔ)上,發(fā)展出了異構(gòu)網(wǎng)絡(luò)。在3GPP LTE-A相關(guān)標(biāo)準(zhǔn)的制定過程中,異構(gòu)網(wǎng)絡(luò)技術(shù)也被放在了一個(gè)重要位置上。由于LTE-A異構(gòu)網(wǎng)絡(luò)改變了原有的網(wǎng)絡(luò)拓?fù)浣Y(jié)構(gòu),如何處理異構(gòu)網(wǎng)絡(luò)中的小區(qū)間干擾成為了重要研究課題。在LTE-A異構(gòu)網(wǎng)絡(luò)小區(qū)間干擾協(xié)調(diào)技術(shù)中,功率控制和時(shí)域的干擾協(xié)調(diào)技術(shù)最受重視。小區(qū)范圍拓展(CRE)技術(shù)和幾乎空白子幀技術(shù)(ABS)都成為了LTE-A異構(gòu)網(wǎng)絡(luò)小區(qū)間干擾協(xié)調(diào)的關(guān)鍵技術(shù)。CRE技術(shù)可以打破Macro小區(qū)和Pico小區(qū)由于用戶接入能力不同所導(dǎo)致的負(fù)載不平衡。ABS技術(shù)則通過讓Macro基站在某些子幀上不發(fā)送數(shù)據(jù)信號,減少M(fèi)acro基站對Pico基站CRE區(qū)域用戶受到的小區(qū)間干擾,從而提升Pico小區(qū)吞吐量。本文詳細(xì)介紹了LTE-A中的異構(gòu)網(wǎng)絡(luò),并且介紹了包括頻域、功率控制、時(shí)域這三種主要的異構(gòu)網(wǎng)絡(luò)小區(qū)間干擾協(xié)調(diào)技術(shù)。本文主要研究了時(shí)域增強(qiáng)型小區(qū)間干擾協(xié)調(diào)方法。對LTE-A異構(gòu)網(wǎng)絡(luò)進(jìn)行了仿真模型的建立,并對ABS技術(shù)進(jìn)行了仿真分析。詳細(xì)介紹了LTE-A異構(gòu)網(wǎng)絡(luò)時(shí)域eICIC中的CRE技術(shù)。著重研究了在ABS上進(jìn)行改進(jìn)提出的LP-ABS,通過系統(tǒng)仿真,研究了LP-ABS相比傳統(tǒng)ABS帶來的各種影響和對系統(tǒng)性能的增益。分析了不同的CRE條件下,不同功率衰減值對LP-ABS方案性能的影響。并且,還分析了LP-ABS技術(shù)在不同功率衰減值下,對Macro層和Pico層的不同作用和影響。根據(jù)對仿真數(shù)據(jù)分析,總結(jié)出使用LP-ABS方案時(shí),各種參數(shù)的設(shè)置方法。對ABS技術(shù)和CoMP技術(shù)的結(jié)合進(jìn)行了研究。提出了一種自適應(yīng)的ABS-CoMP方案,通過每次比較ABS和CoMP波束賦形的系統(tǒng)容量,自適應(yīng)地選擇出容量更大的方案,從而提升整個(gè)系統(tǒng)的增益。并對自適應(yīng)ABS-CoMP方案進(jìn)行了系統(tǒng)建模與仿真,分析了ABS-CoMP方案相比傳統(tǒng)方案和單純ABS方案帶來的增益和存在的不足,分別分析了ABS-CoMP方案對Macro小區(qū)用戶,Pico邊緣用戶和Pico中心用戶的帶來的影響。
[Abstract]:In recent years, cellular mobile communication technology has developed rapidly. In order to meet the increasing and diverse needs of mobile communication, the isomorphic network is based on. The development of heterogeneous networks. 3GPP LTE-A standards in the formulation process. Heterogeneous network technology has also been placed in an important position because of the LTE-A heterogeneous network has changed the original network topology. How to deal with inter-cell interference in heterogeneous networks has become an important research topic. In LTE-A heterogeneous network inter-cell interference coordination technology. Most attention is paid to power control and interference coordination in time domain. Cell area expansion (CRE) technique and almost blank subframe technique (ABS). CRE technology can break the load imbalance of Macro cell and Pico cell due to the difference of user access ability. BS technology by having the Macro base station do not send data signals on certain subframes. Reduce the Macro base station to Pico base station CRE area users suffered by the inter-cell interference, thereby improving the Pico cell throughput. This paper introduces the heterogeneous network in LTE-A in detail. It also introduces frequency domain and power control. In this paper, the time-domain enhanced inter-cell interference coordination method is studied, and the simulation model of LTE-A heterogeneous network is established. The ABS technology is simulated and analyzed. The CRE technology in the time domain eICIC of LTE-A isomerous network is introduced in detail. The LP-ABS which is improved on ABS is studied emphatically. Through the system simulation, the effects of LP-ABS on the performance of the system compared with the traditional ABS are studied, and the performance gains of the system are analyzed under different CRE conditions. The influence of different power attenuation values on the performance of LP-ABS scheme is also analyzed. Furthermore, the LP-ABS technology under different power attenuation values is also analyzed. According to the analysis of simulation data, the paper summarizes the use of LP-ABS scheme. The combination of ABS technology and CoMP technology is studied, and an adaptive ABS-CoMP scheme is proposed. By comparing the system capacity of ABS and CoMP beamforming each time, the scheme with larger capacity is selected adaptively. In order to improve the gain of the whole system, the adaptive ABS-CoMP scheme is modeled and simulated. Compared with the traditional scheme and the simple ABS scheme, the gain and the shortcomings of the ABS-CoMP scheme are analyzed, and the ABS-CoMP scheme to the Macro cell users is analyzed respectively. The impact of Pico Edge users and Pico Center users.
【學(xué)位授予單位】：西安電子科技大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TN929.5;TN972

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