System and method for sharing a control channel for carrier aggregation

  • US 10,594,467 B2
  • Filed: 06/13/2018
  • Issued: 03/17/2020
  • Est. Priority Date: 06/15/2009
  • Status: Active Grant
First Claim
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1. A method for user equipment (UE) in a wireless communication system, the method comprising:

  • receiving a signal indicating a first carrier index associated with a first carrier and a second carrier index associated with a second carrier;

    monitoring a first search space including a first group of physical downlink control channel (PDCCH) candidates, and a second search space including a second group of PDCCH candidates, the first search space and the second search space being on the first carrier, wherein the first group of PDCCH candidates is used to transmit resource grants for the first carrier, and the second group of PDCCH candidates is used to transmit resource grants for the second carrier;

    receiving a resource grant via at least one PDCCH candidate of the first or second group of PDCCH candidates, the resource grant including a field identifying the first carrier index or the second carrier index; and

    determining that the at least one PDCCH candidate is used to transmit resource grants for the first carrier or the second carrier based on priorities of the first carrier and the second carrier, wherein the at least one PDCCH candidate includes an overlapping PDCCH candidate of the first and second groups of PDCCH candidates.

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