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Packet communication processing method

  • US 5,168,497 A
  • Filed: 09/19/1989
  • Issued: 12/01/1992
  • Est. Priority Date: 09/21/1988
  • Status: Expired due to Fees
First Claim
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1. A packet communication processing method for communication of packets between a sending end apparatus which sends said packets and a destination end apparatus which receives said packets through a network system having a plurality of node apparatuses, in which at least one of said node apparatuses located on a route between said sending end apparatus and said destination end apparatus contains a communication apparatus for communicating control frames and information frames with an adjacent one of said node apparatuses or an adjacent one of said end apparatuses located on said route, the adjacent one node apparatus or the adjacent one end apparatus implementing a connection type data link protocol which is of high level data link control, synchronous data link control or of logical link control, each one of said information frames includes one of said packets and a sending sequence number for expressing a sequence for sending said information frames, said method comprising:

  • a first step in which said communication apparatus accepts information frames received from the adjacent one node apparatus or the adjacent one end apparatus regardless of whether said sending sequence number of each of said information frames is correct or not and sends out the packets included in said accepted information frames onto a destination end apparatus side route, in which said first step includes,a step of counting a number of information frames received; and

    a step of sending a receive-ready frame to the adjacent one node apparatus or to the adjacent one end apparatus whenever said number of information frames received reaches a predetermined value, for indicating that said communication apparatus is ready to receive new information frames;

    a second step in which said destination end apparatus detects that packets sent from said sending end apparatus are missing, and in which said destination end apparatus sends a notification of the missing of packets to said sending end apparatus; and

    a third step in which said sending end apparatus re-sends the missing packets or a series of packets containing said missing packets upon reception of said notification of the missing of packets.

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