本文選題：LTE-A系統(tǒng) + D2D通信��； 參考：《蘭州理工大學(xué)》2017年碩士論文

【摘要】：隨著智能移動終端的廣泛應(yīng)用以及新型無線數(shù)據(jù)業(yè)務(wù)的不斷涌現(xiàn),以基站為核心的傳統(tǒng)LTE-A系統(tǒng)面臨著嚴峻的挑戰(zhàn)。D2D通信是一種使移動終端之間不通過基站轉(zhuǎn)發(fā)而直接進行數(shù)據(jù)傳輸?shù)男滦屯ㄐ偶夹g(shù),在LTE-A系統(tǒng)中引入D2D通信技術(shù)不僅能夠提高系統(tǒng)容量、數(shù)據(jù)傳輸速率以及能量效率,還可以提高頻譜資源利用率,很大程度上緩解頻譜資源匱乏的難題。本文主要研究了LTE-A系統(tǒng)下D2D通信資源分配以及干擾抑制問題,分別針對D2D通信復(fù)用蜂窩上行資源與下行資源兩種場景下干擾問題,提出相應(yīng)的資源分配算法,旨在通過合理的資源分配來抑制通信干擾。此外,在資源分配時還結(jié)合了兩種功率控制方法調(diào)節(jié)用戶發(fā)送功率,以降低能耗。具體內(nèi)容如下:1.針對D2D通信復(fù)用蜂窩上行資源時產(chǎn)生的同頻干擾問題,提出了一種基于模糊聚類分組的資源分配算法以抑制干擾。該算法允許多個D2D用戶復(fù)用同一蜂窩用戶上行資源,首先將系統(tǒng)內(nèi)所有D2D用戶進行模糊聚類分組,其次基于最小化中斷概率為每個D2D分組選擇一個最優(yōu)蜂窩用戶上行資源。最后,考慮到D2D應(yīng)用于社交網(wǎng)絡(luò)中對系統(tǒng)能量效率要求較高的情況,聯(lián)合一種有效的功率控制方案調(diào)節(jié)用戶的發(fā)送功率,以提高能效。仿真表明,該算法降低了用戶間干擾以及系統(tǒng)能耗,提高了系統(tǒng)吞吐量以及系統(tǒng)滿意度。2.針對D2D通信復(fù)用蜂窩下行資源時產(chǎn)生的同頻干擾問題,提出一種基于圖著色的加權(quán)優(yōu)先資源分配算法以抑制干擾。該算法首先建立異構(gòu)干擾圖,對系統(tǒng)內(nèi)終端用戶及干擾類型進行分類異構(gòu)。其次考慮多種因子計算用戶的著色優(yōu)先級,并且同時進行著色資源分配。最后依據(jù)資源分配結(jié)果,基于最小化能耗調(diào)節(jié)用戶發(fā)送功率。仿真表明,該算法既可以降低用戶間干擾、提高系統(tǒng)吞吐量,又能夠降低系統(tǒng)能耗、延長移動終端通信時間。
[Abstract]:With the wide application of intelligent mobile terminals and the emergence of new wireless data services, The traditional LTE-A system with base station as its core is facing a severe challenge. D2D communication is a new communication technology that enables mobile terminals to transmit data directly without transmitting by base station. The introduction of D2D communication technology in LTE-A system can not only improve the system capacity, data transmission rate and energy efficiency, but also improve the efficiency of spectrum resources, to a large extent, alleviate the problem of lack of spectrum resources. In this paper, the problem of D2D communication resource allocation and interference suppression in LTE-A system is studied, and the corresponding resource allocation algorithm is proposed for the interference problem of D2D communication multiplexing cellular uplink resource and downlink resource respectively. The aim is to restrain communication interference by rational resource allocation. In addition, two power control methods are combined in resource allocation to reduce energy consumption. The details are as follows: 1. A resource allocation algorithm based on fuzzy clustering is proposed to suppress the interference caused by co-frequency interference caused by D2D communication multiplexing cellular uplink resources. The algorithm allows multiple D2D users to reuse the same cellular user's uplink resources. Firstly, all D2D users in the system are grouped by fuzzy clustering, and then an optimal cellular user's uplink resource is selected for each D2D packet based on minimizing the outage probability. Finally, considering the high requirement of system energy efficiency in the application of D2D in social networks, an effective power control scheme is proposed to adjust the transmission power of users to improve energy efficiency. Simulation results show that the proposed algorithm reduces interuser interference and system energy consumption and improves system throughput and system satisfaction. A weighted priority resource allocation algorithm based on graph coloring is proposed to suppress the interference caused by co-frequency interference caused by D2D communication multiplexing cellular downlink resources. The algorithm firstly builds the heterogeneous interference graph and classifies the end users and interference types in the system. Secondly, various factors are considered to calculate the user's coloring priority, and coloring resources are allocated at the same time. Finally, according to the result of resource allocation, the user transmission power is adjusted based on minimizing energy consumption. Simulation results show that the proposed algorithm can not only reduce interuser interference, improve system throughput, but also reduce system energy consumption and prolong communication time of mobile terminal.
【學(xué)位授予單位】：蘭州理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TN929.5

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本文編號：1851135