5G D2D通信建立机制与资源复用技术研究

发布时间：2018-02-13 12:30

本文关键词： 5G D2D 设备发现基于FFR的分区算法基于FFR的划分复用和通信限制区算法授权与非授权频谱共存　出处：《西南交通大学》2017年硕士论文　论文类型：学位论文

【摘要】：随着海量智能终端设备与日俱增和满足用户特定需求的新兴业务方兴未艾,移动通信承载的数据流量爆炸式增长和无线频谱资源紧缺的矛盾日益涌现。增加网络容量、提高频谱利用率和提升由更加丰富的通信模式带来的终端用户体验(QoS)刻不容缓。作为面向5G关键候选技术之一的设备到设备(Device-to-Device,D2D)通信技术,将依托未来移动通信技术超高速率、超大带宽、超大规模接入能力和超大数据处理能力等特征,充分彰显自身优势。D2D通信通过复用蜂窝网络频谱资源以提升系统吞吐量,但同时也带来了 D2D设备发现、连接建立和系统用户间干扰等问题,本文重点研究满足特定需求的D2D设备发现机制和降低用户间干扰提升系统吞吐量性能的资源复用算法。论文在介绍D2D通信研究背景、意义和发展现状的基础上,首先针对D2D设备发现过程提出了满足特定需求的不同方案;然后详细分析了 D2D通信复用5G蜂窝上行和下行授权频谱资源时不同用户所受的干扰;仿真验证了部分频率复用(Fraction Frequency Reuse,FFR)算法相比于其他资源分配算法的优越性;提出了基于FFR的分区资源复用算法和基于FFR的划分复用限制区和通信限制区的资源复用算法,仿真结果表明:D2D复用下行资源时,本文所提的两种算法相比FFR算法均能获得更高的系统吞吐量,同时找出了最大化小区吞吐量的中心区域与小区总面积的比值;另外,考虑到未来蜂窝用户部分数据传输将迁移到非授权频段,因此,分析了引入非授权频段后,D2D复用资源的多种模式,并仿真分析了四种复用模式下的用户吞吐量。结果表明:授权和非授权频谱共存场景下,CUE授权+CUE非授权+D2D复用授权模式下小区用户总吞吐量性能最优。
[Abstract]:With the increasing number of intelligent terminal devices and the emerging services to meet the specific needs of users, the contradiction between the explosive growth of data traffic carried by mobile communications and the shortage of wireless spectrum resources is emerging day by day. It is urgent to improve the spectrum efficiency and improve the end user experience (QoS) brought about by a richer communication mode. As one of the key candidate technologies for 5G, the device to device Device-to-device D2D communication technology will rely on the future mobile communication technology super high speed rate. The characteristics of ultra-large bandwidth, super-large-scale access capacity and super-large data processing capability fully demonstrate its advantages. D2D communication improves system throughput by multiplexing spectrum resources of cellular networks, but also brings D2D device discovery. In this paper, we focus on D2D device discovery mechanism and resource reuse algorithm to reduce inter-user interference to improve the throughput performance of the system. The background of D2D communication research is introduced in this paper. On the basis of the significance and current situation, different schemes are proposed to meet the specific requirements for the D2D device discovery process, and then the interference of different users when D2D communication multiplexes 5G cellular uplink and downlink authorized spectrum resources is analyzed in detail. The simulation results show that the partial frequency reuse Frequency reuse algorithm is superior to other resource allocation algorithms, and proposes a partition resource reuse algorithm based on FFR and a resource reuse algorithm based on FFR for dividing multiplexing restricted areas and communication limited areas. The simulation results show that the two algorithms proposed in this paper can achieve higher system throughput than the FFR algorithm, and find out the ratio of the center area to the total cell area to maximize the cell throughput. Considering that the future data transmission of some cellular users will be migrated to the non-authorized frequency band, this paper analyzes the various modes of D2D multiplexing resources after the introduction of the unauthorized frequency band. The simulation results show that under the coexistence of authorized and unauthorized spectrum scenarios, the total throughput of cell users is optimal in the case of cue authorized CUE unauthorized D2D multiplexing authorization mode.
【学位授予单位】：西南交通大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TN929.5

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