A system is provided in which capacity and satisfaction rate with a
quality of service in packet communications performed through a radio
link established between a transmitting station and a receiving station
is improved by dynamically limiting transmission power of packets in the
transmitting station and keeping an increase of an interference level in
the receiving station, which belongs to another cell, within a TPC
margin. The present invention includes a resource allocator configured to
set transmission power of packets in a next step period, by use of
transmission power of packets in a preceding step period (slot) and an
interference level of the receiving station.