摘要随着我国高速铁路以及客运专线的不断重建与发展，铁路无线通信系统必须具备很好的保证列车行车安全的功能才能满足广大用户的需求。

GSM-R系统是铁路专用的数字通信系统，GSM-R无线网络技术在铁路通信中的作用变得越来越重要。从铁路的特殊安全考虑，对GSM-R无线系统的线状覆盖和越区切换也提出的更高的要求。

针对这些问题，研究GSM-R无线网络覆盖方式、应用方式以及在专用模式下GSM-R双层网络的实现方法。研究越区切换过程，对切换掉话、阻塞性能进行分析，研究切换掉话率以及阻塞率等。设计越区切换的算法，并对该算法进行改进和仿真。通过改善越区切换性能，缩短切换时间，提高效率来解决高铁中GSM-R越区切换可能出现的问题。81145

该论文有图25幅，表19个，参考文献21篇。

毕业论文关键词：GSM-R  双网  覆盖方式  越区切换  算法性能

The Design of GSM-R network coverage and Handover

Abstract With the development of high-speed railway and passenger dedicated line in China, the railway wireless communication system must have a good function to ensure the safety of the train to meet the needs of users。

GSM-R system is a special railway digital communication system, the role of GSM-R wireless network technology in railway communication becomes more and more important in view of the special railway safety, of GSM-R wireless system linear coverage and hand off is also proposed higher requirements。

To solve these problems, research of GSM-R wireless network coverage, application mode and implementation method of GSM-R double layer network in special mode。 Study hand off process, to switch out words, the blocking performance analysis, the switching of the off rate and blocking probability。 Design is cut for the algorithm and the algorithm were improved and simulated。 Through the improvement of hand off performance, shorten the switching time and improve the efficiency to solve the problem of high speed railway GSM-R hand off may occur。

There are 25 figures, 19 tables and 21 references in this paper。

Key words: GSM-R  network  coverage performance  hand off   algorithm

目 录

摘要 I

Abstract II

图清单 IV

表清单 V

变量注释表 VI

1 绪论 1

1。1 GSM-R系统的研究背景及意义 1

1。2 国内外GSM-R的发展 2

1。3 论文的主要工作 3

2 铁路GSM-R无线网络覆盖方式 4

2。1 GSM-R无线网络覆盖方式 4

2。2 无线双网覆盖应用方式 6

2。3 专用模式下GSM-R双网的实现 7

3 越区切换性能分析 12

3。1 越区切换的流程分析 12

3。2 切换掉话性能分析 15

3。3切换阻塞性能分析 18

4 高速铁路GSM-R越区切换 25

4。1 高速铁路越区切换算法 25

4。2 高速铁路GSM-R越区切换存在的问题 30

5 总结