System and method for sharing a control channel for carrier aggregation

  • US 11,051,287 B2
  • Filed: 08/11/2017
  • Issued: 06/29/2021
  • Est. Priority Date: 04/30/2010
  • Status: Active Grant
First Claim
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1. A method for providing a control channel at a network access device in a multi-carrier communication system, the method comprising:

  • determining a plurality of control channel element (CCE) subset candidates corresponding to a first carrier and a second carrier, wherein the plurality of CCE subset candidates are on the first carrier;

    determining whether one of the CCE subset candidates at an aggregation level corresponds to only one of the first and second carriers; and

    responsive to a determination that the one of the CCE subset candidates does not correspond to only one of the first and second carriers;

    allocating a carrier indicator field (CIF) in downlink control information (DCI) for the one of the CCE subset candidates, wherein the CIF includes an indication value indicating to which carrier the one of the CCE subset candidates belongs, andtransmitting the DCI in the one of the CCE subset candidates for a resource grant on a carrier indicated by the CIF.

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