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Method of packet data transfer with hybrid ARQ

  • US 20020053058A1
  • Filed: 07/09/2001
  • Published: 05/02/2002
  • Est. Priority Date: 10/31/2000
  • Status: Active Grant
First Claim
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1. A method of transmitting packet data to a receiver in a communication system using a Hybrid ARQ technique, the method comprising the steps of:

  • (a) transmitting a first packet encoded with a first code rate to a receiver;

    (b) decoding said first packet in said receiver if a buffer used in said receiver is empty;

    (c) comparing an index representative of how much said first packet is damaged to a predetermined threshold value if a first error is occurred during the step (b);

    (d) storing said first packet in said buffer and requesting to transmit a second additional packet encoded with a second code rate if said index is greater than or equal to said threshold value, said second code rate being lower than said first code rate; and

    (e) requesting to re-transmit said first packet if said index is less than said threshold value.

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