Patent ID: 7012910

Claim:
A wireless packet communication system comprising a base station and a plurality of mobile units, wherein a mobile unit “i” notifies information indicating a transmission rate DRC i (n) receivable with downlink, information of the transmission rate DRC i (n) itself or information from which the transmission rate DRC i (n) can be derived to a base station in every slots, and the base station computes R i (n) relevant to all the mobile units “i” in every slots capable of transmission in accordance with the following formula (1) or a formula equivalent to the formula (1), further, the base station computes an evaluation function F i (n) in a slot “n” relevant to all the mobile units “i” in accordance with the following formula (2); determines a mobile unit “m” showing maximum value of the evaluation function Fi (n); and transmits a packet to the mobile unit “m” with a downlink at a transmission rate DRC m (n) at which the mobile unit “m” is receivable, R i ⁡ ( n ) = ( 1 - 1 t c ) × R i ⁡ ( n - 1 ) + 1 t c × f ⁡ ( r i ⁡ ( n - 1 ) ) ( 1 ) wherein r i (n) represents a transmission rate in a slot “n” relevant to a mobile unit “i”; t c represents a time constant; and f ( ) denotes an arbitrary function, provided if f (x)≠C·x. F i ⁡ ( n ) = D ⁢ ⁢ R ⁢ ⁢ C i ⁡ ( n ) R i ⁡ ( n ) ⁢ ⁢ ( C ⁢ ⁢ is ⁢ ⁢ an ⁢ ⁢ arbitrary ⁢ ⁢ constant ) . ( 2 )