System and method for sharing a control channel for carrier aggregation

  • US 10,693,617 B2
  • Filed: 06/13/2018
  • Issued: 06/23/2020
  • Est. Priority Date: 06/15/2009
  • Status: Active Grant
First Claim
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1. A method for a network access device in a wireless communication system, the method comprising:

  • transmitting, to user equipment, a signal indicating a first carrier index associated with a first carrier and a second carrier index associated with a second carrier;

    determining a first search space and a second search space associated with the user equipment, wherein;

    the first search space and the second search space are on the first carrier, the first search space comprises a first group of physical downlink control channel (PDCCH) candidates,the second search space comprises a second group of PDCCH candidates,the first group of PDCCH candidates is used to transmit resource grants for the first carrier,the second group of PDCCH candidates is used to transmit resource grants for the second carrier,the first and second groups of PDCCH candidates comprise an overlapping PDCCH candidate, andone of the first and second carriers has priority; and

    transmitting a resource grant for the first or second carrier of the user equipment via the overlapping PDCCH candidate of the first and second groups of PDCCH candidates based on the priority of the first or second carrier, the resource grant including a field identifying the first carrier index or the second carrier index.

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