Please download the dossier by clicking on the dossier button x
×

Mitigating ACK/NACK errors in MIMO/SIC/HARQ

  • US 7,940,663 B2
  • Filed: 07/15/2005
  • Issued: 05/10/2011
  • Est. Priority Date: 07/20/2004
  • Status: Expired due to Fees
First Claim
Patent Images

1. A method of mitigating effects of acknowledgement interpretation errors during communication in a wireless network, comprising:

  • identifying an error related to interpretation of an acknowledgement indicative of a successfully decoded data packet;

    determining error type, wherein the error is a downward mismatch error in which a transmitter incorrectly interprets the acknowledgment as indicating that a smaller number of data packets were successfully decoded by a receiver than actually were successfully decoded, and wherein the transmitter redundantly transmits one or more data packets in a subsequent transmission based at least in part on the incorrect interpretation of the acknowledgement;

    generating, by the receiver, a replica of a last successfully decoded data packet prior to decoding data packets in the subsequent transmission, and comparing the replica to a data packet in the subsequent transmission to determine whether a predetermined threshold correlation value is exceeded; and

    remedially restoring a state of synchronization between the receiver that provided the acknowledgement and the transmitter that misinterpreted the acknowledgement, based at least in part on the type of error identified.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×