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PUCCH resource compression for EPDCCH in TDD mode

  • US 10,327,233 B2
  • Filed: 07/17/2018
  • Issued: 06/18/2019
  • Est. Priority Date: 01/14/2013
  • Status: Active Grant
First Claim
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1. A user equipment (UE) comprising:

  • processing and receiver circuitry to receive downlink control information (DCI) on an enhanced physical downlink control channel (EPDCCH) that includes indexed enhanced control channel elements (ECCEs), the DCI to schedule a physical downlink shared channel (PDSCH) resource for a downlink subframe;

    receive an acknowledgment resource offset (ARO) value in an ARO field of the DCI that instructs the UE to shift a PUCCH resource index by an amount equal to a value of the ARO; and

    determine a physical uplink control channel (PUCCH) resource index to acknowledge PDSCH transmissions as a function of a lowest ECCE index used to construct the EPDCCH;

    wherein the value of the ARO field corresponds to an ARO value to shift the PUCCH resource index to a range used for acknowledging PDSCH transmissions in an earliest subframe of a bundling window,wherein, for a downlink subframe having a relative index m between 0 and M−

    1 with M being a number of subframes in the bundling window and with m=0 representing the earliest subframe, the PUCCH resource index nPUCCH(1) is used to determine the resource block pair, and cyclic shift, andwherein a format 1 PUCCH is computed as;

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