Straight placeeing the stop receives the mobile station、The foundation stop signal is carried on the relay afterwards enlargeing fireing, Thereby the cover blind area attain、Aim of shadow zone, As a result, The consumer lower area of cipher code is living、Expressway、Conference heart、Tunnel、That some particular areas obtain the wide-ranging application awaited that in tourism district.
直放站接收移动台、基站的信号进行中继放大后发射，从而达到覆盖盲区、阴影区的目的，因而，在用户密度较低的区域、高速公路、会议中心、隧道、旅游区等一些特殊区域得到广泛的应用。