本文關(guān)鍵詞： LTE D2D 無線資源管理 模式選擇 資源分配　出處：《北京交通大學(xué)》2014年碩士論文　論文類型：學(xué)位論文

【摘要】：近幾年來,隨著移動多媒體技術(shù)的迅猛發(fā)展,用戶對數(shù)據(jù)傳輸速率的要求也越來越高。可是,蜂窩網(wǎng)絡(luò)可以使用的頻譜資源卻十分有限。蜂窩網(wǎng)絡(luò)中的終端直通(Device to Device, D2D)技術(shù)可以很好地解決這個問題。D2D終端可以直接進(jìn)行數(shù)據(jù)傳輸,而不需要經(jīng)過基站的轉(zhuǎn)發(fā)。相比于傳統(tǒng)的蜂窩通信,D2D通信技術(shù)可以節(jié)約一半的頻譜資源,同時D2D通信技術(shù)具有傳輸速率高、時延小、低功耗等特點,因此研究D2D通信技術(shù)有著十分重要的意義。 論文首先介紹了蜂窩移動通信系統(tǒng)的發(fā)展歷史、D2D通信技術(shù)的基本原理、LTE系統(tǒng)以及襯底于LTE系統(tǒng)的D2D通信技術(shù),分析了D2D通信技術(shù)的性能特點、D2D會話的建立過程以及D2D通信的信道測量機(jī)制,并對D2D通信的無線資源管理技術(shù)進(jìn)行了詳細(xì)介紹。 其次,論文分析了蜂窩系統(tǒng)下行鏈路的干擾特性,并基于D2D用戶在小區(qū)中的位置設(shè)計了一種聯(lián)合模式選擇與資源分配方案。該方案首先根據(jù)D2D用戶在小區(qū)中的位置為D2D用戶選擇合適的通信模式,然后根據(jù)系統(tǒng)吞吐量的增益和蜂窩用戶傳輸速率的約束為D2D用戶分配合適的無線資源進(jìn)行通信。仿真結(jié)果表明,基于位置的D2D聯(lián)合模式選擇與資源分配方案能在保證蜂窩網(wǎng)絡(luò)性能的同時,減少終端之間的干擾,提升系統(tǒng)總吞吐量。 最后,論文分析了蜂窩系統(tǒng)上行多業(yè)務(wù)場景下的干擾特性,并基于用戶的QoS需求設(shè)計了一種聯(lián)合模式選擇與資源分配方案。該方案首先根據(jù)D2D用戶的業(yè)務(wù)類型為D2D用戶選擇合適的通信模式,然后根據(jù)D2D用戶的QoS需求和蜂窩用戶的目標(biāo)信干噪比約束為D2D用戶分配合適的無線資源進(jìn)行通信,同時,隨著循環(huán)的不斷進(jìn)行,基站會根據(jù)當(dāng)前的網(wǎng)絡(luò)狀態(tài)和用戶的業(yè)務(wù)變化對D2D用戶的通信模式和資源分配進(jìn)行動態(tài)的調(diào)整。仿真結(jié)果表明,基于QoS感知的D2D聯(lián)合模式選擇與資源分配方案能帶來更高的用戶QoS滿意度和系統(tǒng)總吞吐量。
[Abstract]:In recent years, with the rapid development of mobile multimedia technology, users' demand for data transmission rate is becoming higher and higher. However, However, the spectrum resources that can be used in cellular networks are very limited. The technology of terminal direct access device to device (D2D) in cellular networks can solve this problem very well. D2D terminals can transmit data directly. Compared with the traditional cellular communication technology, D2D communication technology can save half of the spectrum resources, and D2D communication technology has the characteristics of high transmission rate, low delay, low power consumption and so on. So it is very important to study D2D communication technology. Firstly, the paper introduces the development history of cellular mobile communication system, the basic principle of D2D communication technology and the D2D communication technology based on LTE system. This paper analyzes the performance characteristics of D2D communication technology and the establishment process of D2D session and the channel measurement mechanism of D2D communication, and introduces the wireless resource management technology of D2D communication in detail. Secondly, the paper analyzes the interference characteristics of the downlink in the cellular system. Based on the location of D2D users in the cell, a joint mode selection and resource allocation scheme is designed. Firstly, according to the location of the D2D user in the cell, the scheme selects the appropriate communication mode for the D2D user. Then, according to the constraints of system throughput gain and cellular user transmission rate, D2D users are assigned appropriate wireless resources for communication. The simulation results show that, Location based D2D joint mode selection and resource allocation scheme can not only guarantee the performance of cellular network, but also reduce the interference between terminals and enhance the total throughput of the system. Finally, the paper analyzes the interference characteristics of the cellular system under the uplink multi-service scenario. A scheme of joint mode selection and resource allocation is designed based on the QoS requirements of the user. Firstly, according to the service type of the D2D user, a suitable communication mode is selected for the D2D user. Then, according to the QoS requirements of D2D users and the target signal-to-noise ratio of cellular users, the D2D users are assigned appropriate wireless resources for communication. Meanwhile, as the cycle goes on, The base station dynamically adjusts the communication mode and resource allocation of D2D users according to the current network state and the service changes of the users. The simulation results show that, The D2D joint mode selection and resource allocation scheme based on QoS awareness can bring higher user QoS satisfaction and total system throughput.
【學(xué)位授予單位】：北京交通大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TN929.5

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本文編號：1545357