摘要
存量地铁隧道信号覆盖主要方式为泄漏电缆,但2019年之前建设漏缆为13/8″漏缆,不支持3.5 GHz频段。当前存量地铁隧道5G覆盖主要有3种方案,分别为新建2路5/4″漏缆、新建3.5 GHz RRU+贴壁天线以及新增2.1 GHz NR 2/4TR信源合路存量漏缆。通过对比3种方案,综合协调难度、建设成本、建设周期等因素,确定适合存量地铁隧道5G覆盖方案,使之具有较好的推广借鉴意义。
The main way of signal coverage for existing subway tunnels in stock is leaky cable communication,but the leaky cable constructed before 2019 is 13/8"leaky cable,which does not support 3.5 GHz band.At present,there are three schemes for 5G coverage of existing subway tunnels:two new 5/4"leaky cables;new 3.5 GHz RRU+Wall covering antenna;new 2.1 GHz NR 2/4TR combined leaky cables.Through comparison of the three schemes,and comprehensive coordination of difficulties,construction cost,construction period and other factors,the 5G coverage scheme suitable for existing subway tunnels is determined,so that it has a good promotion and reference significance.
作者
李宗
刘海龙
LI Zong;LIU Hailong(GCI Science&Technology Co.,Ltd.,Guangzhou Guangdong 510310,China)
出处
《通信技术》
2021年第9期2283-2290,共8页
Communications Technology
关键词
存量地铁隧道
5G覆盖
贴壁天线
泄露电缆
existing MTR tunnel
5G signal cover
wall covering antenna
leakage cable communication
