Method, base station, and user equipment for feeding back ACK/NACK information for carrier aggregation

CAFC
  • US 8,885,587 B2
  • Filed: 06/02/2012
  • Issued: 11/11/2014
  • Est. Priority Date: 12/03/2009
  • Status: Active Grant
First Claim
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1. A method for feeding back Acknowledgement/Negative-acknowledgement (ACK/NACK) information for carrier aggregation, the method comprising:

  • configuring a common field preset in Downlink Control Information (DCI) as one command according to a type of a downlink component carrier transmitting the DCI, wherein the common field is indicative of one of a transmission power control (TPC) command and an ACK resource indication (ARI) command; and

    sending the DCI to a user equipment;

    wherein configuring the common field comprises configuring the common field in at least one piece of DCI transmitted by a system-linked downlink component carrier as a TPC command and configuring the common field in at least one piece of DCI transmitted by a non-system-linked downlink component carrier as an ARI command.

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