Mobile communication system and mobile station device

摘要

The present invention relates to a mobile communication system in which data is transmitted and received through a wireless transmission line between a mobile station device and a network-side device, wherein a transmitting-side device comprises: a transmitter configured to transmit each data unit of the data to a receiving-side device; and a retransmission controller configured to perform retransmission processing on the data unit, in accordance with a retransmission request from the receiving-side device; and the receiving-side device comprises: an acknowledgement issue prohibition period manager configured to manage an acknowledgement issue prohibition period during which issue of an acknowledgement on a received data unit is prohibited; a retransmission request issue prohibition period manager configured to manage a retransmission request issue prohibition period during which, when a reception error is detected in the data unit, issue of a retransmission request for requesting retransmission processing on the data unit is prohibited; and a control information transmitter configured to transmit the acknowledgement on the data unit received within the acknowledgment information issue prohibition period, after a lapse of the acknowledgment information issue prohibition period, and to transmit the retransmission request on the data unit in which a reception error is detected within the retransmission request issue prohibition period, after a lapse of the retransmission request issue prohibition period.