Retransmission request transmitting method and the receiving device

In the retransmission request transmission method, at the timing of generating a STATUS-PDU, RLC sublayer of the receiving-side apparatus, yet unsuccessfully received RLC-PDU-data (or, RLC-data-Sub-PDU) retransmission control in the MAC sublayer for determines whether or not processing is being performed, based on the determination result, in RLC-data-PDU not yet received, and, only RLC-data-PDU retransmission control processing is not performed in the MAC sublayer It generates a STATUS-PDU (NACK) containing transmits.