本文選題：長(zhǎng)期演進(jìn)增強(qiáng)版 + 異構(gòu)網(wǎng)絡(luò)��； 參考：《電子科技大學(xué)》2014年碩士論文

【摘要】：隨著移動(dòng)互聯(lián)網(wǎng)日漸成為未來(lái)網(wǎng)絡(luò)發(fā)展的方向,移動(dòng)終端在接入互聯(lián)網(wǎng)時(shí)將優(yōu)先選擇已經(jīng)廣泛部署的移動(dòng)通信網(wǎng)絡(luò),使得用戶大量涌入無(wú)線通信系統(tǒng)獲得數(shù)據(jù)流量。另外,相關(guān)研究表明未來(lái)60%~80%的移動(dòng)數(shù)據(jù)業(yè)務(wù)的場(chǎng)景發(fā)生改變。越來(lái)越多的用戶選擇在室內(nèi)使用移動(dòng)數(shù)據(jù)業(yè)務(wù),并且大量用戶聚集的公共場(chǎng)所也將形成熱點(diǎn)區(qū)域。傳統(tǒng)的蜂窩網(wǎng)絡(luò)架構(gòu)并不能適應(yīng)這種應(yīng)用場(chǎng)景的新變化,必須引入新型網(wǎng)絡(luò)架構(gòu)以滿足用戶需求。第三代合作伙伴計(jì)劃(3rd Generation Partnership Project,3GPP)在長(zhǎng)期演進(jìn)增強(qiáng)版(Long Term Evolution-Advanced,LTE-Advanced)系統(tǒng)中加入了多種低功率節(jié)點(diǎn)。而這種新型的網(wǎng)絡(luò)架構(gòu)被稱為異構(gòu)網(wǎng)絡(luò)。而由于異構(gòu)網(wǎng)絡(luò)復(fù)雜的拓?fù)涮卣?不可避免地帶來(lái)嚴(yán)重的層間干擾問題。通過節(jié)點(diǎn)間信息的協(xié)調(diào)交互可以有效的減少以上的干擾問題。另外,低功率節(jié)點(diǎn)的引入導(dǎo)致異構(gòu)網(wǎng)絡(luò)節(jié)點(diǎn)密集分布,這為節(jié)點(diǎn)間的協(xié)作通信提供可能。綜上,協(xié)作通信是異構(gòu)網(wǎng)絡(luò)提高系統(tǒng)性能的重要手段。本文首先介紹了LTE-Advanced系統(tǒng)、異構(gòu)網(wǎng)絡(luò)部署方案及傳統(tǒng)的協(xié)作通信技術(shù)。然后基于LTE-Advanced系統(tǒng)中宏(Macro)基站和微微(Pico)基站共存的異構(gòu)網(wǎng)絡(luò),本文中提出了一種資源塊級(jí)別的跨層協(xié)作傳輸機(jī)制。此協(xié)作傳輸機(jī)制采用相干傳輸預(yù)編碼技術(shù),能夠使得多個(gè)協(xié)作用戶在同一個(gè)資源塊上接受協(xié)作簇中多個(gè)協(xié)作基站的服務(wù)以減少層間干擾�；谏鲜龅目鐚訁f(xié)作傳輸框架,本文還提出了一種協(xié)作資源塊分配策略,實(shí)現(xiàn)Macro基站和Pico基站的協(xié)作無(wú)線資源控制。為驗(yàn)證上述的跨層協(xié)作傳輸技術(shù),研究中搭建了基于LTE-Advanced的異構(gòu)網(wǎng)絡(luò)系統(tǒng)級(jí)仿真平臺(tái)。并且通過對(duì)異構(gòu)網(wǎng)絡(luò)系統(tǒng)性能的仿真,表明所提出的協(xié)作傳輸機(jī)制在系統(tǒng)吞吐量性能方面優(yōu)于3GPP標(biāo)準(zhǔn)化的的小區(qū)間干擾協(xié)調(diào)增強(qiáng)技術(shù)。最后,為適應(yīng)更高系統(tǒng)容量和頻譜效率的5G網(wǎng)絡(luò)的無(wú)線接入技術(shù),根據(jù)非正交多址技術(shù)(Non-Orthogonal Multiple Access,NOMA)原理,提出了結(jié)合NOMA的異構(gòu)網(wǎng)絡(luò)協(xié)作通信機(jī)制,以解決異構(gòu)網(wǎng)絡(luò)中小區(qū)范圍擴(kuò)展區(qū)域內(nèi)的層間干擾問題。在此異構(gòu)網(wǎng)絡(luò)協(xié)作通信系統(tǒng)的基礎(chǔ)上,采用了宏基站和低功率基站間的協(xié)作用戶調(diào)度和協(xié)作功率分配機(jī)制。經(jīng)過系統(tǒng)級(jí)仿真驗(yàn)證,采用此協(xié)作通信技術(shù)可以得到顯著的系統(tǒng)吞吐量性能增益。
[Abstract]:With the mobile Internet becoming the direction of the future network development, mobile terminals will give priority to the mobile communication network which has been widely deployed when accessing the Internet, which makes users pour into wireless communication systems to obtain data traffic. In addition, research indicates that 60% of mobile data traffic scenarios will change in the future. More and more users choose to use mobile data services indoors, and a large number of public places where users gather will form hot spots. The traditional cellular network architecture can not adapt to the new changes of the application scenario, so it is necessary to introduce a new network architecture to meet the needs of users. The 3rd Generation Partnership Project 3GPP adds a variety of low-power nodes to the long term Evolution-Evolution-Advanced system. This new network architecture is called heterogeneous network. Due to the complex topological characteristics of heterogeneous networks, it inevitably brings serious interlayer interference problem. The above problems can be effectively reduced by the coordination and interaction of information between nodes. In addition, the introduction of low power nodes leads to the dense distribution of heterogeneous network nodes, which provides the possibility for cooperative communication between nodes. In summary, cooperative communication is an important means to improve system performance in heterogeneous networks. This paper first introduces LTE-Advanced system, heterogeneous network deployment scheme and traditional cooperative communication technology. Then, based on the heterogeneous network where Macro and Pico base stations coexist in LTE-Advanced system, a cross-layer cooperative transmission mechanism at resource block level is proposed in this paper. The cooperative transmission mechanism uses coherent transmission precoding technology to enable multiple cooperative users to receive the services of multiple cooperative base stations in the collaboration cluster on the same resource block in order to reduce interlayer interference. Based on the above cross-layer cooperative transmission framework, this paper also proposes a cooperative resource block allocation strategy to realize the cooperative radio resource control between Macro base station and Pico base station. In order to verify the above cross-layer cooperative transmission technology, a heterogeneous network system-level simulation platform based on LTE-Advanced was built. The simulation of heterogeneous network system shows that the proposed cooperative transmission mechanism is superior to the 3GPP standardized inter-cell interference coordination enhancement technique in system throughput performance. Finally, in order to adapt to the wireless access technology of 5G network with higher system capacity and spectral efficiency, according to the principle of Non-orthogonal multiple access (NOMA), a cooperative communication mechanism based on NOMA for heterogeneous networks is proposed. In order to solve the problem of interlayer interference in the extended area of cell scope in heterogeneous networks. Based on this heterogeneous network cooperative communication system, the cooperative user scheduling and cooperative power allocation mechanism between the macro base station and the low power base station are adopted. The system level simulation shows that the system throughput performance gain can be achieved by using this cooperative communication technology.
【學(xué)位授予單位】：電子科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TN929.5

【參考文獻(xiàn)】

相關(guān)碩士學(xué)位論文 前1條

1 安瑞虹;LTE系統(tǒng)中家庭基站干擾管理研究[D];北京郵電大學(xué);2011年

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本文編號(hào)：2097917