| 摘要 |
<p>A radio controller (205) notifies a transfer rate that can be currently established in the radio line transfer rate to a transfer rate decision unit (207). A buffer monitor unit (208) monitors a medium data amount stored in a medium reception buffer (209). When the medium data storage amount exceeds a threshold value, it is notified to the transfer rate decision unit (207). The transfer rate decision unit (207) outputs a medium data transfer rate increase request to a control signal transmission/reception unit (206) when radio line transfer rate information from the radio controller (205) indicates that the radio line transfer rate can be increased and the monitor information from the buffer monitor unit (208) indicates that the data storage amount of the medium reception buffer (209) does not exceed the threshold value. Thus, even when the maximum radio line transfer rate that can be established is lowered by deterioration of the communication environment, data reproduction does not stop.</p> |
