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Hybrid automatic repeat request acknowledge resource allocation for enhanced physical downlink control channel

  • US 9,877,230 B2
  • Filed: 08/05/2016
  • Issued: 01/23/2018
  • Est. Priority Date: 06/17/2011
  • Status: Active Grant
First Claim
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1. A user equipment, comprising:

  • a transceiver;

    a data processor connected to said transceiver; and

    a memory connected to said digital data processor storing data and at least one application program controlling operation of said data processor, said at least one application program operable to control said data processor toreceive a control message on an enhanced physical downlink control channel (EPDCCH);

    receive a second message indicated by the control message;

    receive a demodulation reference signal on the same antenna port as the associated EPDCCH physical resource;

    transmit an ACK/NAK signal on an ACK/NAK resource determined from the EPDCCH indicating whether the second message was correctly received by the user equipment;

    transmit the ACK/NACK using physical uplink control channel format 1a or 1b wherein the PUCCH resource is determined for at least one EPDCCH physical resource block set according to;


    nPUCCH(1)=nindex+NPUCCH(1)+g(NPUCCH,e(1))where nindex is the respective lowest indexed physical resource block or lowest indexed control channel element;

    NPUCCH(1) is the cell-specific offset;

    NPUCCH,e(1) is determined from a resource offset field corresponding to the EPDCCH, and g(NPUCCH,e(1)) is a function of NPUCCH,e(1).

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