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Terminal apparatus and retransmission control method

  • US 10,455,516 B2
  • Filed: 11/15/2017
  • Issued: 10/22/2019
  • Est. Priority Date: 04/21/2009
  • Status: Active Grant
First Claim
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1. A terminal that communicates with a base station using a unit band group comprising a plurality of downlink unit bands and uplink unit bands, the plurality of downlink unit bands comprising a downlink base unit band and a downlink non-base unit band, the unit band group comprising control information, the terminal comprising:

  • a processor configured;

    to transmit a response signal to the base station using resources of an uplink control channel associated with the downlink base unit band based upon receiving downlink assignment control information transmitted in the downlink unit band and the downlink non-base unit band;

    not to transmit the response signal to the base station when either;

    (1) not receiving any downlink assignment control information, or (2) receiving an error detection result only about the downlink data information transmitted in a downlink non-base unit band.

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