Patent ID: 7310531

Claim:
A base station apparatus comprising: a communication unit which communicates with a terminal apparatus at variable transmission rates; a channel allocation unit which allocates predetermined ones of a plurality of time slots included in a frame, such that time slots in a plurality of frames consecutive over a predetermined period are allocated to the terminal apparatus, and time slots in a plurality of frames consecutive over a period other than the predetermined period are allocated to another terminal apparatus; a change planning unit which plans timing for changing a transmission rate for the terminal apparatus in a period which is defined by a plurality of frames and in which the time slots are allocated; and a change determination unit which determines to change the transmission rate for the terminal apparatus if a remaining period, occurring between a change in the transmission rate planned by the change planning unit and an end of the period defined by the plurality of frames and in which the time slots are allocated, is equal to or greater than a threshold value, and determines not to change the transmission rate for the terminal apparatus if the remaining period is not equal to or greater than the threshold value.