Patent ID: 7839821

Claim:
A packet transmission control device for controlling transmission of packets to each of a plurality of wireless terminals, the packet transmission control device comprising: channel assignment means for assigning a channel to the plurality of wireless terminals, based on an evaluated value calculated by the evaluation function calculation portion from an evaluation function including in a denominator of the evaluation function an average radio channel quality value for each of the wireless terminals, the evaluation function being C n =(R n ) α /(avrgR n ) β , where R n is the radio channel condition, avrgR n is the average transmission rate of a wireless terminal n, and α and β are parameter coefficients between 0 and 1; and initializing means for initializing the average transmission rate when the evaluated value becomes an abnormal value, that is, when the evaluated value approaches zero; wherein when one of the plurality of wireless terminals transitions to an abnormal state, the frequency of assigning packets to the wireless terminal is reduced.