High-speed rail mobile network coverage is one of the key points of the three major telecommunications operators

and high-speed rail tunnel mobile network coverage is a major difficulty for operators. According to an example of high-speed railway line coverage in the central province of China

this paper adopts the mode of "equipment + PoI + leaky cable"

that is

the signal source equipment of three operators is connected through PoI

the signal is output to leaky cable for tunnel coverage

and the tunnel is extended and covered by broadband switching antenna installed at the tunnel entrance Changping station

and the main equipment signal sources are reasonably arranged through the link budget to realize the seamless coverage from the tunnel to the outside. Finally

according to the existing mature network coverage solutions

the future mobile network coverage scheme of 5G high-speed railway tunnel is discussed.