铁路交汇区域GSM-R无线网络覆盖方案研究

摘要

In the intersection region of the railway, it tends to form a triangle, "T" shape and cross shape. For these special regions, if the traditional coverage scheme such as Marco-cell base station or repeater is used, it is easy to pro-duce GSM-R network interference and Ping-Pong handover problems, which will lead to CTCS-3 train control information transmission failure and train common braking triggering and affect the normal running of high speed train. Taking inter-section area of Harbin-Dalian and PanYing High speed Railways as an example, this paper analyzes the principles of dis-tributed base station and total cell synchronization technology, puts forward the intersection area covered by total cell technology of distributed base station and calculates the carrier frequency capacity of base station. This scheme ensures GSM-R wireless signal is redundant, solves the network delay and network interference and meets the requirement of wireless communication services, such as CTCS-3 train control information transmission service etc. Before the imple-mentation of the scheme, Harbin-Dalian High-speed Railway GSM -R Numbering scheme is modified in the GSM-R Numbering scheme of PanYing High speed Railway to realize the group call and short number call service in the intersec-tion region.%铁路交汇区域往往会形成三角形、“T”形和十字交叉形等特殊区域。若采用传统宏基站或直放站覆盖方案，这些区域容易产生网内干扰和乒乓切换等问题，导致CTCS-3列控信息传送失败，列车触发常用制动，影响高速列车正常行驶。文章以哈大高速铁路和盘营高速铁路交汇区域为例，分析了分布式基站和共小区同步技术的原理，提出用分布式基站的共小区技术覆盖铁路交汇区域，并计算了基站的载频容量。该方案保证高速铁路交汇区域 GSM -R无线网络冗余覆盖，解决了网络时延和网内干扰等问题，较好地满足了CTCS-3列控信息传送质量等无线通信业务的需求。方案实施前，在盘营高速铁路GSM-R编号方案中对哈大GSM-R编号方案进行修改，实现交汇区域的组呼和短号码呼叫等业务。