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HARQ signaling for grant-free uplink transmissions

  • US 10,673,593 B2
  • Filed: 10/31/2017
  • Issued: 06/02/2020
  • Est. Priority Date: 11/03/2016
  • Status: Active Grant
First Claim
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1. A method performed by a base station comprising:

  • receiving a first grant-free uplink transmission from a first user equipment (UE);

    receiving a second grant-free uplink transmission from a second UE;

    transmitting, to the first UE and to the second UE, a group ACK/NACK message indicating an ACK or a NACK corresponding to the first grant-free uplink transmission and an ACK or a NACK corresponding to the second grant-free uplink transmission;

    wherein the first UE and the second UE are in a group having a group ID, wherein the group ACK/NACK is associated with the group ID, wherein the group ACK/NACK is transmitted in group-common downlink control information (DCI), and wherein a cyclic redundancy check (CRC) of the group-common DCI is masked by the group ID.

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