Patent ID: 7558225

Claim:
A radio base station apparatus used in a radio communication system in which an initiator holds a transmission opportunity (TXOP) period in a frame exchange sequence and a responder responds to the initiator in the frame exchange sequence, comprising: a setting device configured to set a ratio between a first period necessary for transmitting a first frame from the initiator to the responder and a second period necessary for transmitting a second frame from the responder to the initiator; and a calculation device configured to calculate the first period to be used by the initiator and the second period to be used by the responder, on the basis of the transmission opportunity period and of the ratio which is set, wherein the setting device acquires a transmission amount of data that higher order layers transmit and a transmission amount of transmission acknowledgement frames for the data transmitted by the higher order layers and sets a ratio between the transmission amount of data of the higher order layers and the transmission amount of the transmission acknowledgement frames for the data transmitted by the higher order layers, when communication of the data is performed in accordance with a communication method by which two protocols are used for transmissions of the higher order layers and lower order layers, the transmission acknowledgement frames in the higher order layers are provided for the data transmissions of the higher order layers and the transmission acknowledgement frames of the higher order layers become the transmission data of the lower order layers.