  With the rapid development of high-speed railways, demands on high mobility
wireless communication increase greatly. To provide stable and high data rate
wireless access for users in the train, it is necessary to properly deploy base
stations along the railway. In this paper, we consider this issue from the
perspective of channel service which is defined as the integral of the
time-varying instantaneous channel capacity. It will show that the total
service quantity of each base station is a constant. In order to keep high
service efficiency of the railway communication system with multiple base
stations along the railway, we need to use the time division to schedule the
multiple stations and allow one base station to work when the train is running
close to it. In this way, we find a fact that if the ratio of the service
quantity provided by each station to its total service quantity is given, the
base station interval(i.e. the distance between two adjacent base stations) is
a constant, regardless of the speed of the train. On the other hand, interval
between two neighboring base stations will increase with the speed of the
train. Furthermore, using the concept of channel service, we also analyze the
transmission strategy of base stations.
