5G系统中小区选择策略研究

5G系统中小区选择策略研究(任务书,开题报告,论文13000字)
摘 要
本文主要研究了5G系统小区的选择策略，通过对近年来国内外无线通信的发展引出了5G超密集网络概念。为了解决5G超密集网络带来的邻近小站间距小干扰大的问题，用户为中心的网络结构因而面世，增强了用户的抗干扰能力，使得频繁的业务切换也得以简化。以用户为中心网络也需要用户对站点进行选择，而其核心便是减少用户选择站点时的切换失败次数。根据这这一核心理念，本文对比分析了几种不同的站点选择方法，结合各种方法优缺点优化了基于驻留时间的选站方法。通过公式推导，模型建立以及仿真分析找到了合适的门槛时间，用户速度，TTT与Offset取值，以保证用户切换失败次数，不必要切换概率和乒乓切换概率最低。
关键词：超密集网络  用户为中心网络  驻留时间  站点切换
 
Abstract
This paper mainly studies the selection strategy of 5G system cell, and introduces the concept of 5G ultra-dense network through the development of wireless communication at home and abroad in recent years. In order to solve the problem of small interference between adjacent small stations caused by 5G ultra-dense network, a user-centered network structure occurred, which enhances the user's anti-interference ability and makes frequent service switching easier. User-centric networks also require users to choose sites, and the core is to reduce the number of failed handovers when users choose a site. According to this core concept, this paper looks for a comparative analysis of several different site selection methods, and combines the advantages and disadvantages of various methods to select a station selection method based on dwell time. Through formula derivation, model establishment and simulation analysis find the appropriate threshold time, speed of the user as well as value of TTT and Offset, guarantee the number of user handover failures, and the unnecessary handover probability and ping-pong handover probability are the lowest.
Keywords：Ultra-dense network user-centric network dwell time site switching

目录
第 1章 绪论    1
1.1 研究背景及意义    1
1.2 国内外发展现状    1
1.3 本文的结构    2
第 2 章 5G系统小区选择    3
2.1 超密集网络    3
2.2 以用户为中心网络    4
2.3 UCN站点选择    5
2.4 本章小结    6
第 3 章 基于驻留时间的站点选择    7
3.1 原理介绍    7
3.1.1 平均驻留时间    8
3.1.2 直线移动模型分析    9
3.1.3 站点驻留时间计算及切换影响因素    10
3.2 本章小结    11
第 4 章 仿真分析    12
4.1 平均驻留时间    12
4.2 直线移动模型分析    13
4.3 用户切换仿真    14
4.4 本章小结    18
第 5 章 总结与展望    19
5.1 总结    19
5.2 展望与不足    19
参考文献    20
致谢    21