5G 系统移动台端D2D通信建立研究与实现

论文总字数：49182字

摘 要

D2D通信是在蜂窝网络的管制下相距较近的若干个设备间直接通信的技术，它的出现促成了无线通信系统往网络融合方向发展。5G系统中不仅要求频谱利用率、网络容量等指标进一步提升，还需要通信模式变得更丰富灵活，而D2D通信的出现正好满足了这两点要求。在5G网络架构中将D2D通信技术融入蜂窝通信网络，使其作为基站侧通信的一种补充，它能够有效地减轻蜂窝基站端的负载，满足海量移动用户终端的连接需求，提高无线资源利用率来缓解无线资源匮乏的问题。

本文以IMT- Advanced D2D技术白皮书和3GPP TR 36.843协议为基础，重点介绍了D2D通信中的自组网技术、设备发现机制、会话建立过程，还提到了D2D技术在实际应用到LTE时的无线帧结构、同步技术和信号的设计等。通过对大量文献资料的学习，依据标准设计并实现了一套D2D移动台端链路的建立流程，在Linux系统下使用C语言完成该系统的仿真。

该仿真系统设计了D2D通信协议中MAC层与PHY层的接口，定义了多种模块，程序运行结果正确，可以完成移动台端D2D通信中的通信建立和数据传输，同时还有挂机、蜂窝通信切换等功能。

关键词：D2D通信 自组网 设备发现 会话建立 Linux实现

Abstract

D2D communication is a technology of direct communication between several devices that are close to each other under the control of a cellular network, and its emergence promotes the development of wireless communication systems toward network convergence. In the 5G system, not only the spectrum utilization rate and network capacity are required to be further improved, but also the communication mode needs to be more flexible, and the emergence of D2D communication just meets these two requirements. In the 5G network architecture, D2D communication technology is integrated into the cellular network to make it a supplement to the base station side communication. It can effectively reduce the load of the cellular base station, meet the connection requirements of massive mobile user terminals, and improve the utilization of wireless resources to alleviate the shortage of wireless resources.

Based on the IMT-Advanced D2D technical white paper and the 3GPP TR 36.843 protocol, this paper focuses on the ad hoc network technology, device discovery mechanism, and session establishment process in D2D communication, it also mentions the radio frame structure, synchronization technology and signal design of D2D technology when it is actually applied to LTE. Through the study of a large amount of literature, a set of D2D mobile station link establishment process was designed independently, and the simulation of the system was completed under the Linux system using C language.

The simulation system designs the interface between the MAC layer and the PHY layer in the D2D communication protocol, defines a variety of modules, and the program runs correctly. It can complete communication establishment and data transmission in D2D communication of mobile station, and also has functions such as on-hook and cellular communication switching.

Keywords:D2D communication, Ad-hoc, device discovery, session establishment, Linux

implemantation

缩略词

API Application Programming Interface 应用程序接口

BP Beacon Period 信标期

BPST Beacon Period Start Time 信标周期起始时间

BS Base Station 基站

CQI Channel Quality Indication 信道质量指示

CCI Cloud Computing Interface 云计算接口

CSID Channel State Information Detector 信道状态信息探测器

D2D Device-to-Device 设备到设备

DwPTS Downlink Pilot Time Slot 下行导频时隙

DP Data Period 数据期

DMRS Demodulation Reference Signal 解调参考信号

DSC D2D Server Core D2D服务器核心

D2DSS D2D Synchronization Signal D2D同步信号

EPC Evolved Packet Core 演进的分组网核心

FDD Frequency Division Duplex 频分双工

GW Gateway 网关

IP Internet Protocol 互联网协议

LTE Long Term Evolution 长期演进

MIMO Multiple-Input Multiple-Output 多输入多输出

MAC Medium Access Control 媒体接入控制层

MME Mobility Management Entity 移动性管理实体

NAS Non-access stratum 非接入层

PDU Protocol Data Unit 协议数据单元

PCRF Policy and Charging Rules Function 政策与收费核心

PUSCH Physical Uplink Shared Channel 物理上行共享信道

PHY Physical Layer 物理层

PD2DSS Primary D2D Synchronization Signal D2D主同步信号

RRC Radio Resource Control 无线资源控制

RDC Resource Dispatching Core 资源调度器核心

SIP Session Initiation Protocol 会话发起协议

SAE System Architecture Evolution 系统架构演进

SD2DSS Secondary D2D Synchronization Signal D2D辅同步信号

TDD Time Division Duplex 时分双工

UE User Equipment 用户设备

UpPTS Uplink Pilot Time Slot 上行导频时隙

目 录

摘要 Ⅰ

Abstract Ⅱ

第一章 绪论 1

1.1 D2D通信研究背景 1

1.2 D2D通信研究现状 2

1.3 论文主要内容和意义 3

第二章 D2D通信系统 5

2.1 D2D通信场景描述 5

2.2 D2D自组网概述 6

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