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HARQ timelines for TDD-FDD carrier aggregation

  • US 9,538,565 B2
  • Filed: 06/27/2014
  • Issued: 01/03/2017
  • Est. Priority Date: 09/26/2013
  • Status: Active Grant
First Claim
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1. A user equipment (UE) configured for cross-carrier scheduled carrier aggregation, the UE comprising:

  • circuitry configured to;

    decode a physical hybrid automatic repeat request (HARQ) indicator channel (PHICH) or a physical downlink control channel (PDCCH) in a scheduling cell to obtain information for scheduling physical uplink shared channels (PUSCHs), the PUSCHs including a first PUSCH in the scheduling cell and a second PUSCH in a scheduled cell, the scheduling cell having a first duplex mode, the scheduled cell having a second duplex mode that is different from the first duplex mode;

    detect from the PHICH, a first HARQ in response to the first PUSCH, in which the first HARQ is detected according to a first predefined HARQ timing corresponding to the first duplex mode; and

    detect from the PHICH, a second HARQ in response to the second PUSCH, in which the second HARQ is detected according to a second predefined HARQ timing corresponding to the first duplex mode or the second duplex mode, in which, in response to the UE receiving during a subframe index value of n a PDCCH or a PHICH associated with the scheduled cell, the second PUSCH is configured to be transmitted during a subframe index value of n+k, where k≧

    4 and where k is based on a preconfigured time division duplex (TDD) configuration type.

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