Patent ID: 7117003

Claim:
A communications control system for controlling packet communications between a base station and a mobile station, said system comprising: a preamble signal transmitter configured to transmit a preamble signal to said base station, varying the transmission power level, in advance of transmission of packet data or a reservation signal; a reservation signal transmitter configured to transmit information, as the reservation signal, regarding the amount and type of subsequent packet data to said base station, in parallel with transmission processing of said packet data; a determiner configured to determine the transmission power level of said packet data based on the received intensity of said preamble signal for a first amount of packet data, and based on said reservation signal and said information regarding the amount and type of said packet data for a second amount of packet data; and a packet data transmitter configured to obtain information regarding said determined transmission power level of said packet data and transmit said packet data based on said obtained information.