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Presence tracking for datagram based protocols with search

  • US 20050108331A1
  • Filed: 10/31/2003
  • Published: 05/19/2005
  • Est. Priority Date: 10/31/2003
  • Status: Abandoned Application
First Claim
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1. A system that facilitates determining presence of an object, comprising:

  • a transmit component that transmits a multicast-type message as a unicast message to the object, the object having a timeout period associated therewith; and

    a presence component that monitors a response to the unicast message from the object, and if a response is not received, the object is presumed to be off-line.

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