| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To ensure normal communication between a user device and a base station apparatus using a common channel for uplink, even when delivery confirmation information which is NACK is erroneously decoded as ACK. <P>SOLUTION: The base station apparatus communicates with the user device in a mobile communication system. The base station apparatus includes a means for preparing the delivery confirmation information indicating whether an uplink signal received from the user device should be retransmitted, a means for preparing control information that permits the user device to transmit an uplink signal, and a means for notifying the user device of the delivery confirmation information and the control information. When the delivery confirmation information indicates a negative acknowledgement, the control information includes retransmission information indicating that an uplink signal previously transmitted by the user device should be retransmitted. <P>COPYRIGHT: (C)2010,JPO&INPIT</p> |
