In a mobile communication system in which a plurality of base stations are connected
to a communication network via a packet transfer node and a transmission rate of
a forward link radio channel between a base station and a mobile station dynamically
changes, each of the base stations designates a packet transmission rate in accordance
with the status of a radio channel of each of mobile stations under control for
the packet transmission node, and the packet control node transfers packets destined
for each of mobile stations to the base station at the designated transfer rate.