D2D通信的无线资源管理技术研究

发布时间：2018-02-28 02:26

本文关键词： LTE D2D 无线资源管理模式选择资源分配　出处：《北京交通大学》2014年硕士论文　论文类型：学位论文

【摘要】：近几年来,随着移动多媒体技术的迅猛发展,用户对数据传输速率的要求也越来越高。可是,蜂窝网络可以使用的频谱资源却十分有限。蜂窝网络中的终端直通(Device to Device, D2D)技术可以很好地解决这个问题。D2D终端可以直接进行数据传输,而不需要经过基站的转发。相比于传统的蜂窝通信,D2D通信技术可以节约一半的频谱资源,同时D2D通信技术具有传输速率高、时延小、低功耗等特点,因此研究D2D通信技术有着十分重要的意义。论文首先介绍了蜂窝移动通信系统的发展历史、D2D通信技术的基本原理、LTE系统以及衬底于LTE系统的D2D通信技术,分析了D2D通信技术的性能特点、D2D会话的建立过程以及D2D通信的信道测量机制,并对D2D通信的无线资源管理技术进行了详细介绍。其次,论文分析了蜂窝系统下行链路的干扰特性,并基于D2D用户在小区中的位置设计了一种联合模式选择与资源分配方案。该方案首先根据D2D用户在小区中的位置为D2D用户选择合适的通信模式,然后根据系统吞吐量的增益和蜂窝用户传输速率的约束为D2D用户分配合适的无线资源进行通信。仿真结果表明,基于位置的D2D联合模式选择与资源分配方案能在保证蜂窝网络性能的同时,减少终端之间的干扰,提升系统总吞吐量。最后,论文分析了蜂窝系统上行多业务场景下的干扰特性,并基于用户的QoS需求设计了一种联合模式选择与资源分配方案。该方案首先根据D2D用户的业务类型为D2D用户选择合适的通信模式,然后根据D2D用户的QoS需求和蜂窝用户的目标信干噪比约束为D2D用户分配合适的无线资源进行通信,同时,随着循环的不断进行,基站会根据当前的网络状态和用户的业务变化对D2D用户的通信模式和资源分配进行动态的调整。仿真结果表明,基于QoS感知的D2D联合模式选择与资源分配方案能带来更高的用户QoS满意度和系统总吞吐量。
[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.
【学位授予单位】：北京交通大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN929.5

【参考文献】