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Communication apparatus and retransmission control method

  • US 10,484,155 B2
  • Filed: 10/11/2018
  • Issued: 11/19/2019
  • Est. Priority Date: 08/12/2011
  • Status: Active Grant
First Claim
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1. A communication apparatus comprising:

  • a receiver, which, in operation, in case of carrier aggregation aggregating a primary cell and one or more secondary cells, receives a physical HARQ indicator channel (PHICH) including an ACK or NACK transmitted from another communication apparatus in the primary cell and not in the one or more secondary cells;

    a retransmission controller, which, in operation, controls retransmission of data to the other communication apparatus in the primary cell based on the PHICH and assignment control information received in the primary cell, andcontrols retransmission of data to the other communication apparatus in the one or more secondary cells based on assignment control information received in one of the primary cell and the one or more secondary cells and not based on the PHICH; and

    a transmitter, which, in operation, transmits the retransmission data on a physical uplink shared channel (PUSCH).

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