消除青藏线铁路通信中隧道弱场盲区的研究

Research on Eliminating Blind Spot and Weak-field in Tunnel of Qinghai-Tibet Railway

文中介绍和分析了青藏线铁路通信昆仑桥隧道中弱场盲区的具体状况,针对该隧道实际情况和青藏铁路组网中GSM-R通信系统采用O2+O1的双基站冗余配置方案,文中设计了光纤直放站+漏缆中继器的冗余配置通信方案,消除该隧道通信中弱场盲区。实际测试结果表明:采用文中设计的思路和方案,隧道内覆盖场强值提高了35dBm,彻底消除了该隧道弱场盲区,满足了设计要求。

This paper describes and analyzes the specific situation of the blind spot and weak-field in the Kunlun Tunnel of the Qinghai-Tibet Railway, In view of the actual situation, and the O2 ＋ O1 dual-redundant configuration in the GSM-R communication system used in the Qinghai-Tibet railway, a communication program is designed with fiber Repeater plus Leakage cable repeater, thus to eliminate the weak-field in the tunnel. The actual test results shows that： with this ideas and the program, the field strength values is increased by 35 dBm in the tunnel, thus eliminating the weak-field and the blind spots in the tunnel, and satisfying the design requirements.