GSM-R网络越区切换性能研究

GSM-R(GSM for Railway)是以GSM(全球移动通信系统)为平台,集列车公务通信和区间通信为一体的铁路专用移动通信系统,已经成为我国铁路通信技术的发展方向。越区切换是GSM-R系统的关键技术之一,由于列车速度的提升导致多普勒效应更严重、切换位置更靠后、越区切换更频繁,最终GSM-R的安全性和可靠性会严重降低,因此对越区切换的研究具有非常重要的意义。本文分析了GSM—R网络越区切换掉话的原因并提出了优化方案。

GSM - R （GSM for Railway）is based on GSM （global system for mobile communications） platform, concluding the train business communication and interval communication.Nowadays it has become the development direction of Railway communication technology in China. Handoff is one of the key technology of GSM - R system. As the Speed-raising of trains causes the severe Doppler Effect,postponement of handover triggering and frequent handover,the safety and reliability of the GSM-R system will be seriously reduced.So the.research is of great importance. This article analyzes the reasen of GSM - R network handoff drop words and put forward the optimization scheme