Patent ID: 8619691

Claim:
A method for allocating resources for an uplink control message at base station, the method comprising: generating a packet data unit that includes a first field and a downlink control message, wherein the first field indicates whether unsolicited resource is to be allocated for an uplink control message; transmitting the generated packet data unit to a terminal; allocating resources for the uplink control message; and transmitting the allocated resources to the terminal, wherein the packet data unit further includes a second field and a third field, the second field indicates whether or not an acknowledgement (ACK) message for the downlink control message is required, and the third field indicates whether or not unsolicited resource is to be allocated for the ACK message, wherein the generating a packet data unit includes: determining whether or not an uplink control message for the downlink control message is required when the downlink control message is generated; and setting the first field to indicate that the unsolicited resource allocation is to be performed for the uplink control message when the uplink control message is required.