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Method and apparatus for providing likely updates to views of group members in unstable group communication systems

  • US 7,548,972 B2
  • Filed: 10/23/2002
  • Issued: 06/16/2009
  • Est. Priority Date: 10/23/2002
  • Status: Active Grant
First Claim
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1. A method of providing updates to views of group members in unstable group communication systems, the method comprising the computer-implemented steps of:

  • a receiving node receiving a group message from a sender associated with a sending node in a network, wherein the group message includes a message view having a counter and an acknowledgment set, wherein the acknowledgment set contains information that identifies one or more receiving nodes to which the group message is directed;

    wherein a receiving node is a processing node that comprises one or more group members;

    deferring issuance of an acknowledgment of the group message to the sending node;

    delivering the group message to the one or more group members;

    receiving an acknowledgment of the group message from one of the receiving nodes;

    updating the message view by removing, from the acknowledgment set, information that identifies each receiving node that issues an acknowledgment;

    determining a number of group members of one of the receiving nodes that received the message;

    updating the message view by incrementing the counter to the number of group members that received the message; and

    providing the updated message view to the sender.

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