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Detection and recovery of HARQ NAK-to-ACK feedback error in wireless communications systems

  • US 9,344,228 B2
  • Filed: 01/27/2015
  • Issued: 05/17/2016
  • Est. Priority Date: 07/07/2008
  • Status: Active Grant
First Claim
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1. A method to be performed by a first wireless communications device, the method comprising:

  • receiving a first transmission from a second wireless communications device, the first transmission containing a first hybrid automatic repeat request (HARQ) channel ID (ACID);

    transmitting a first NAK to the second wireless communications device to indicate that the first transmission was received incorrectly;

    monitoring for a retransmission of the first transmission;

    receiving, while monitoring for the retransmission, a second transmission from the second wireless communications device, the second transmission containing the first ACID and an indication that the second transmission is not a retransmission of the first transmission; and

    transmitting a second NAK to the first device to indicate that the first transmission was received incorrectly;

    wherein said transmitting the first NAK complies with a HARQ protocol and said transmitting the second NAK complies with an automatic repeat request (ARQ) protocol.

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