本文選題：LTE-A + 異構(gòu)節(jié)點(diǎn)��； 參考：《天津大學(xué)》2014年碩士論文

【摘要】：為滿足未來(lái)無(wú)線通信市場(chǎng)的更高需求,LTE-A系統(tǒng)應(yīng)運(yùn)而生。為進(jìn)一步提高系統(tǒng)容量,異構(gòu)網(wǎng)絡(luò)成為L(zhǎng)TE-A的一個(gè)新特性。比如,通過(guò)在原來(lái)宏網(wǎng)絡(luò)中部署微蜂窩(micro)、微微蜂窩(pico)、毫微微蜂窩(femto)、中繼(relay)等低功率節(jié)點(diǎn)來(lái)改善室內(nèi)深度覆蓋、增加網(wǎng)絡(luò)容量、提升用戶感知。但是這些異構(gòu)節(jié)點(diǎn)的引入將不可避免的帶來(lái)新的干擾問(wèn)題,這將會(huì)嚴(yán)重影響LTE-A異構(gòu)網(wǎng)絡(luò)的整體性能。因此,如何抑制新引入節(jié)點(diǎn)與宏基站間的干擾問(wèn)題已成為業(yè)內(nèi)人士關(guān)注的焦點(diǎn),合理抑制異構(gòu)網(wǎng)絡(luò)中的干擾對(duì)下一代移動(dòng)通信系統(tǒng)的發(fā)展具有重要意義。本文詳細(xì)介紹了LTE-A關(guān)鍵技術(shù)、LTE-A異構(gòu)網(wǎng)絡(luò)發(fā)展歷程、干擾場(chǎng)景以及干擾抑制相關(guān)知識(shí)。針對(duì)LTE-A異構(gòu)網(wǎng)絡(luò),本文重點(diǎn)研究了relay系統(tǒng)和femto系統(tǒng)的干擾協(xié)調(diào)方案,包括方案的選取及改進(jìn)。論文主要工作和成果包括以下兩方面:第一,針對(duì)LTE-A relay系統(tǒng),本文主要研究系統(tǒng)中存在的上行干擾。文中從小區(qū)內(nèi)和小區(qū)間上行干擾兩方面入手,提出了一種聯(lián)合頻域協(xié)調(diào)和功率控制的干擾協(xié)調(diào)方案。與傳統(tǒng)干擾協(xié)調(diào)方案相比,該方案在考慮提高整個(gè)網(wǎng)絡(luò)的吞吐量和小區(qū)邊緣用戶速率的前提下,還考慮了提升用戶的滿意度;并首次將頻域協(xié)調(diào)和功率控制方法相結(jié)合,通過(guò)基于OI和RSRP的用戶類(lèi)型判定、基于HII的動(dòng)態(tài)頻譜分配方法以及基于RSRP修正的功率控制方法,從而達(dá)到減小LTE-A relay系統(tǒng)的上行干擾的效果。第二,對(duì)于LTE-A femto系統(tǒng),本文主要是對(duì)系統(tǒng)中存在的下行干擾進(jìn)行研究。通過(guò)分析研究現(xiàn)有的用于LTE-Afemto系統(tǒng)干擾抑制方案的優(yōu)勢(shì)和不足,提出了基于SFR的小區(qū)間干擾協(xié)調(diào)方案,并對(duì)新舊方案分別進(jìn)行了仿真驗(yàn)證。仿真結(jié)果表明,該方案減小了系統(tǒng)中femto節(jié)點(diǎn)對(duì)宏用戶的干擾,以及eNodeB和附近其他femto節(jié)點(diǎn)對(duì)femto用戶的干擾,提高了整個(gè)系統(tǒng)的吞吐量和小區(qū)邊緣用戶的平均吞吐量。
[Abstract]:LTE-A system emerges as the times require to meet the higher demand of future wireless communication market. In order to further improve the system capacity, heterogeneous networks become a new feature of LTE-A. For example low power nodes such as microcellular (micro), pico cellular (pico), femtosecellular (femto), relay (relay) are deployed in the original macro network to improve indoor depth coverage increase network capacity and enhance user perception. However, the introduction of these heterogeneous nodes will inevitably bring about new interference problems, which will seriously affect the overall performance of LTE-A heterogeneous networks. Therefore, how to suppress the interference between the newly introduced nodes and the Acer stations has become the focus of attention of the industry. It is of great significance for the development of the next generation mobile communication system to reasonably suppress the interference in heterogeneous networks. In this paper, the key technology of LTE-A is introduced in detail, including the development of LTE-A heterogeneous networks, interference scenarios and interference suppression knowledge. For LTE-A heterogeneous networks, this paper focuses on the interference coordination scheme of relay system and femto system, including the selection and improvement of the scheme. The main work and achievements are as follows: firstly, for LTE-A relay system, the uplink interference in LTE-A relay system is studied in this paper. In this paper, an interference coordination scheme of joint frequency domain coordination and power control is proposed from two aspects of intra-cell and inter-cell uplink interference. Compared with the traditional interference coordination scheme, the scheme not only takes into account the improvement of the throughput of the whole network and the cell edge user rate, but also considers the improvement of user satisfaction, and combines frequency domain coordination and power control methods for the first time. The Uplink interference of LTE-A relay system can be reduced by judging the user type based on Oi and RSRP, the dynamic spectrum allocation method based on HII and the power control method based on RSRP correction. Secondly, for LTE-A femto system, the downlink interference in the system is studied in this paper. By analyzing the advantages and disadvantages of the existing interference suppression schemes for LTE-Afemto systems, a SFR-based inter-cell interference coordination scheme is proposed, and the new and old schemes are verified by simulation. The simulation results show that the scheme reduces the interference of femto nodes to macro users and eNode B and other femto nodes nearby to femto users, and improves the throughput of the whole system and the average throughput of cell edge users.
【學(xué)位授予單位】：天津大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類(lèi)號(hào)】：TN929.5

【參考文獻(xiàn)】

相關(guān)期刊論文 前1條

1 馮川;李小文;;LTE終端小區(qū)選擇方案設(shè)計(jì)及實(shí)現(xiàn)[J];電訊技術(shù);2010年03期

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本文編號(hào)：2078984