Patent ID: 9277546
Filing Date: 2016-03-01
CPC Classification: H03M,H04L,H04W

Claim Text:
1. A method of operating a base station terminal that is configured to wireless communication over a primary carrier and at least one secondary carrier, the method comprising: transmitting, from the base station, one or more downlink control messages to the wireless terminal, wherein each downlink control message contains scheduling information scheduling the wireless terminal to receive a downlink transmission on either a primary carrier or a secondary carrier during a first subframe; wherein a format for an uplink control message is based on whether any of the one or more downlink control messages includes scheduling information scheduling the wireless terminal to receive a downlink transmission on a secondary carrier; receiving an uplink control message from the wireless terminal, the uplink control message based on the selected format, wherein the uplink control message includes feedback information associated with at least one carrier, the feedback information indicating whether the wireless terminal has received a downlink transmission scheduled for the associated carrier.