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Method and system in a data communications system for the retransmission of only an incorrectly transmitted portion of a data packet

  • US 6,141,784 A
  • Filed: 11/26/1997
  • Issued: 10/31/2000
  • Est. Priority Date: 11/26/1997
  • Status: Expired due to Fees
First Claim
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1. A method in a data communications system having a first and a second computer system for retransmitting only a portion of a data packet which had been originally transmitted incorrectly, said method comprising the steps of:

  • establishing a single physical communication link between said first computer system and said second computer system;

    said physical communication link including a first logical link and a second logical link, said first and second logical links being logically related so that said first and second logical links utilize a single set of sequence numbers;

    transmitting a plurality of data packets from said first computer system to said second computer system utilizing said first logical link, each of said data packets including a plurality of segments;

    determining if each of said plurality of data packets is received correctly;

    in response to each determination that one of said plurality of data packets is not received correctly, determining a portion of said one of said plurality of data packets which was transmitted incorrectly; and

    said first computer system retransmitting only said portion of said one of said plurality of data packets utilizing said second logical link.

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