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摘要本文针对怎么样测试和评估 GSM-R 越区切换性能有关方面进行了讨论，提 出了一种利用信号的质量来确定切换性能的方法，GSM-R 网络中的无缝切换得 到实现，进一步增强系统运营的安全性和可靠性。69963
论文主要分析了 GSM-R 网络中原有和国内外的研究境况，介绍说明了切换 的理论依据和可能影响到切换的一些主要问题，可能会影响到系统切换模型的几 个因素：列车的运行速度、覆盖模型和通信模型。依据现代发展的境况，举例说 明了会影响 GSM-R 系统的链路层的切换原因：切换所花费的具体时间以及切换 成功率指标来评估设计的分析和测试方法的具体含义，进行了如何去评估和分析 以及测试设计的方法。在此基础上，提出了一种新的基于信号电平的切换算法的 性能评价方法。
对于硬切换存在的问题，结合在高速铁道 GSM-R 系统运行环境下快速列车 运行轨迹和方向的确定性，提出双天线技术的越区切换方法。该技术的可行性分 析，双天线技术下越区的转换的基本原理，通道的调整和具体的实施过程进行阐 述，最后双天线越区转换技术性能评价评价显示方案能够有效地降低越区切换时 间中断和段落切换越替换的成功率，又很好地避免了“乒乓转换”。所以说双天 线切换技术可以明显的增强 GSM-R 网络中越区切换的性能。因此在双天线的切 换能够让 GSM-R 网络技术越区切换性能提高，进而能提高高速列车系统的可行 性和安全性。
本论文有图 19 幅，表 4 个，参考文献 43 篇
关键字：GSM-R 高速铁路 越区切换 性能评估
Handover in GSM-R Networks of the High Speed Railway System
Abstract For high speed railway special wireless communication system of GSM-R is hard handoff handoff technology existing problems, this thesis of GSM-Rthe handoff performance evaluation test methods and performance evaluation are studied, andputs forward the method to estimate a signal level based on the handoff performanceassessment, and puts forward a dual antenna handoff scheme, seamless handover in GSM-R network is realized, improve the handover performance, to further strengthen the safety and reliability of the operation of high speed railway system. At first, this paper analyzes the GSM-R network in the original more Handoff Technology and the domestic and foreign research situation, clarify the handoff principle and influence the handoff performance of the main factors, including wireless channel model, coverage model and train operation speed. According to the international standard, this paper puts forward on the GSM-R system link switching layer performance metrics: switching time and indicators of the success rate of to evaluate the specific meaning of design analysis and testing method for indicators to assess the specific meaning of the design. And for hard handoff problems, combined with the dual antenna technology in high-speed railway GSM-R system running environment under rapid trains running track and direction to determine the mobile nodes, train length and high operating speed proposed handoff method. The feasibility of the technique analysis and dual antenna technology conversion of the basic principle, adjust the channel and the specific implementation process described in this paper, finally double antenna handoff technology performance evaluation indicates that the scheme can effectively reduce handoff time interrupt and paragraph switch is replaced by the success rate and well avoid "table tennis". Therefore, the handover of the dual antenna handover enables the GSM-R network technology to improve the handoff performance, and improve the reliability and security of the high-speed train system.