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System and method for transmission in a grant-free uplink transmission scheme

  • US 10,149,327 B2
  • Filed: 07/21/2017
  • Issued: 12/04/2018
  • Est. Priority Date: 01/27/2015
  • Status: Active Grant
First Claim
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1. A method comprising:

  • receiving, by a user equipment (UE), a high-level signaling information regarding a first contention transmission unit (CTU) access region for an initial transmission in a first transmission time interval (TTI) and a second CTU access region for a redundant transmission in a second TTI;

    transmitting, by the UE, to a base station (BS), the initial transmission using at least one CTU in the first CTU access region during the first TTI without scheduling signaling from the BS; and

    transmitting, by the UE, to the BS, the redundant transmission using at least one CTU in the second CTU access region during the second TTI without waiting for acknowledgement/negative acknowledgement (ACK/NACK) feedback.

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