论文部分内容阅读
南京地铁1号线无线系统采用EADS公司800M数字集群系统,由交换机、基站、直放站等设备组成,有地下漏缆和地面天线两种无线网络覆盖方式。经过运营使用一段时间后发现无线网络中存在弱场区和通话不良区域,造成越区切换通话中断,主要是覆盖设计不合理的问题。通过对网络原有漏缆覆盖方式优化改造,使场强覆盖达到-85dB以上(95%概率),改善了通话质量,为南京地铁1号线运营的顺畅沟通提供了良好的保障。
Nanjing Metro Line 1 wireless system uses EADS Corporation 800M digital trunking system, which is composed of switches, base stations, repeaters and other equipment. There are two kinds of wireless network coverage modes: underground leakage cable and ground antenna. After some period of operation and use, it is found that there is a weak field area and a poor call area in the wireless network, which results in interruption of the call of the handover and mainly covers problems of unreasonable design. By optimizing and revamping the existing overlay network of the network, the coverage of field strength reaches over -85dB (95% probability) and the call quality is improved, which provides a good guarantee for the smooth communication of Nanjing Metro Line 1 operation.