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HARQ ACK/NAK coding for a communication device during soft handoff

  • US 7,013,143 B2
  • Filed: 04/30/2003
  • Issued: 03/14/2006
  • Est. Priority Date: 04/30/2003
  • Status: Active Grant
First Claim
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1. A method in a mobile station for improving uplink performance, the method comprising the steps of:

  • receiving at least one downlink ACK/NAK transmission;

    discriminating between ACK/NAK transmissions meant for the mobile station and ACK/NAK transmissions meant for other communication devices by applying coded bits that uniquely associate ACK/NAK transmissions with the mobile station; and

    utilizing the information in the ACK/NAK transmission coded for the mobile station in determining uplink transmission activity,the method further comprising the step of using one ACK/NAK channel in a first set of ACK/NAK channels if a first BTS schedules the mobile station and optionally using one ACK/NAK channel in a second set of ACK/NAK channels by the first BTS if other than the first BTS schedules the mobile station.

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