【摘要】：隨著移動(dòng)通信技術(shù)的不斷發(fā)展,多媒體業(yè)務(wù)需求的急劇增長(zhǎng),傳輸速率的不足和頻譜資源的稀缺成為目前移動(dòng)通信領(lǐng)域面臨的主要挑戰(zhàn)。為此,高級(jí)的長(zhǎng)期演進(jìn)技術(shù)(LTE-A)系統(tǒng)引入了終端直通技術(shù)(D2D)。D2D通信技術(shù)的引入,特別是和多播技術(shù)結(jié)合后,不僅能夠提高整個(gè)系統(tǒng)的吞吐量和頻譜利用率,而且還能極大地改善邊緣用戶的服務(wù)質(zhì)量。但是D2D通信技術(shù)的引入也會(huì)給蜂窩系統(tǒng)帶來(lái)一定的干擾。為了降低干擾,提升系統(tǒng)性能,如何進(jìn)行資源分配成為研究的重點(diǎn)。通過(guò)分析現(xiàn)有的D2D通信文獻(xiàn)發(fā)現(xiàn),多數(shù)D2D資源分配算法沒(méi)有考慮蜂窩與D2D混合網(wǎng)絡(luò)系統(tǒng)公平性的問(wèn)題。為此,本文研究了一種提升系統(tǒng)公平性的方案。首先,為了降低資源分配算法的復(fù)雜度和干擾強(qiáng)度,引入了D2D通信限制區(qū)域和D2D用戶限制復(fù)用蜂窩用戶資源區(qū)域的概念;其次,為了保證蜂窩系統(tǒng)服務(wù)質(zhì)量(QoS)需求并提升系統(tǒng)性能,提出一種提升蜂窩系統(tǒng)公平性的資源分配算法;最后,使用非線性規(guī)劃問(wèn)題中的乘子法來(lái)確定D2D用戶和蜂窩用戶的最佳發(fā)射功率。仿真結(jié)果表明所提算法與已有方案相比能夠顯著提升系統(tǒng)的吞吐量和公平性。為了更大程度地利用系統(tǒng)的頻譜資源,本文對(duì)LTE-A系統(tǒng)中D2D多播資源分配問(wèn)題進(jìn)行了研究�？紤]到當(dāng)前文獻(xiàn)對(duì)D2D多播分簇算法研究較少,本文提出了一種低復(fù)雜度的D2D多播分簇算法,以達(dá)到進(jìn)一步提升系統(tǒng)性能的目的。針對(duì)現(xiàn)有D2D多播資源分配算法的不足,本文提出了一種基于圖論的D2D多播資源分配算法。該算法共分兩步完成:首先,使用圖論中的著色算法把D2D多播簇劃分為若干D2D多播簇集合,同一D2D多播簇集合中的D2D多播簇復(fù)用相同的蜂窩用戶資源;其次,使用圖論中的最優(yōu)匹配算法為D2D多播簇集合選擇合適的蜂窩用戶。仿真結(jié)果表明,文章所提的D2D多播分簇算法能夠有效提高NACK用戶的被服務(wù)率和小區(qū)吞吐量,文章所提的D2D多播資源分配算法能夠顯著提高小區(qū)平均頻譜效率和D2D多播用戶的被服務(wù)率。
[Abstract]:With the development of mobile communication technology, the rapid growth of multimedia service demand, the shortage of transmission rate and the scarcity of spectrum resources have become the main challenges in the field of mobile communication. Therefore, the advanced long-term evolution technology (LTE-A) system introduces the terminal pass-through technology (D2D) and the D2D communication technology, especially when combined with multicast technology, it can not only improve the throughput and spectrum efficiency of the whole system, but also improve the throughput and spectrum efficiency of the whole system. And also can greatly improve the quality of service for edge users. However, the introduction of D2D communication technology will also bring some interference to the cellular system. In order to reduce the interference and improve the performance of the system, how to allocate resources has become the focus of the research. By analyzing the existing D2D communication literature, it is found that most D2D resource allocation algorithms do not consider the fairness of cellular and D2D hybrid network systems. Therefore, this paper studies a scheme to improve the fairness of the system. Firstly, in order to reduce the complexity and interference intensity of resource allocation algorithm, the concepts of D2D communication limiting area and D2D user limiting multiplexing cellular user resource area are introduced. Secondly, in order to ensure the quality of service (QoS) requirements and improve the performance of cellular systems, a resource allocation algorithm is proposed to improve the fairness of cellular systems. Finally, the optimal transmit power of D2D users and cellular users is determined by the multiplier method in nonlinear programming problem. Simulation results show that the proposed algorithm can significantly improve the throughput and fairness of the system compared with the existing schemes. In order to make greater use of the spectrum resources of the system, the problem of D2D multicast resource allocation in LTE-A system is studied in this paper. Considering that there is little research on D2D multicast clustering algorithm in current literature, a low complexity D2D multicast clustering algorithm is proposed to further improve the performance of the system. In view of the deficiency of existing D2D multicast resource allocation algorithms, this paper proposes a graph theory-based D2D multicast resource allocation algorithm. The algorithm is divided into two steps: firstly, the D2D multicast cluster is divided into several D2D multicast cluster sets by using the coloring algorithm in graph theory, and the D2D multicast cluster in the same D2D multicast cluster sets reuses the same cellular user resources; Secondly, the optimal matching algorithm in graph theory is used to select suitable cellular users for D2D multicast cluster set. The simulation results show that the proposed D2D multicast clustering algorithm can effectively improve the serviced rate and cell throughput of NACK users. The proposed D2D multicast resource allocation algorithm can significantly improve the cell average spectrum efficiency and the serviced rate of D2D multicast users.
【學(xué)位授予單位】：重慶郵電大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2016
【分類號(hào)】：TN929.5

【參考文獻(xiàn)】

相關(guān)期刊論文 前9條

1 王元;趙季紅;唐睿;曲樺;董姣姣;;D2D多播場(chǎng)景下面向節(jié)能的資源分配機(jī)制[J];西安電子科技大學(xué)學(xué)報(bào);2016年02期

2 趙季紅;王元;唐睿;張振偉;曲樺;;移動(dòng)中繼多播場(chǎng)景下的節(jié)能優(yōu)化[J];電信科學(xué);2015年04期

3 劉雯雯;楊陽(yáng);彭濤;王文博;;蜂窩終端直通混合網(wǎng)絡(luò)中基于不同終端速率要求的資源調(diào)度策略[J];電子與信息學(xué)報(bào);2014年10期

4 王俊義;鞏志帥;符杰林;陳小徽;林基明;;D2D通信技術(shù)綜述[J];桂林電子科技大學(xué)學(xué)報(bào);2014年02期

5 孫曉梅;王斌;王文鼐;張梅;;帶有D2D通信的LTE網(wǎng)絡(luò)中提高公平性的方案[J];南京郵電大學(xué)學(xué)報(bào)(自然科學(xué)版);2013年06期

6 顧聞;;D2D中繼網(wǎng)絡(luò)負(fù)載均衡的中繼選擇算法[J];電信快報(bào);2013年02期

7 徐同剛;;LTE系統(tǒng)中引入D2D技術(shù)后的干擾研究[J];電信快報(bào);2012年11期

8 關(guān)娜;周一青;石晶林;;IMT-Advanced增強(qiáng)多媒體多播技術(shù)[J];中興通訊技術(shù);2011年05期

9 崔鵬;陳力;;D2D技術(shù)在LTE-A系統(tǒng)中的應(yīng)用[J];現(xiàn)代電信科技;2011年Z1期

，

本文編號(hào)：2467145