CMMB系统引入地铁解决方案研究

研究目的:CMMB系统作为一种新兴媒体,将其引入地铁内是个新课题。根据CMMB系统的技术特点和技术指标要求,实现CMMB系统在利用既有通信资源的情况下引入地铁,并提供详细的系统实施技术解决方案。研究结论:通过CMMB系统引入地铁解决方案研究,得出:基于地铁内现有通信资源,CMMB系统引入地铁在车站可与PIS系统共用车站子系统,在隧道区间可与民用移动通信引入系统共用无线覆盖子系统;CMMB系统无线信号利用天线覆盖半径大约为10 m,利用漏泄电缆覆盖距离在1.2 km时不需要加中继设备,无线信号同步采用GPS同步方式;CMMB系统引入的频段建议在600～800 MHz之间,工程建设的设备材料应满足地铁使用环境。

Research on Solution of CMMB System into Metro

Research purposes: The CMMB system into the metro is a new topic as a popular media.According to technical features and technical requirements of CMMB system,the paper is mainly to research on the CMMB system how into metro in use of existing communication resource,and gives detailed system implement technological solutions. Research conclusions:Through research on solution of CMMB system into metro,the paper draws following conclutions:Based on the existing communication resource,CMMB system can share the station subsystem with PIS system and radio coverage subsystem with civil mobile communication system in metro;CMMB system radio signaling coverage radius using antenna is about 10 meters,and coverage distance using leaking cable is 1.2km without radio repeater,and CMMB system radio signaling synchronization mode uses GPS;CMMB system frequency band is between 600 MHz and 800 MHz into metro,and the equipment and materials shall meet requirements of metro environment in engineering construction.