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Methods and systems for delivering presence information regarding push-to-talk subscribers

  • US 7,146,181 B2
  • Filed: 03/11/2004
  • Issued: 12/05/2006
  • Est. Priority Date: 03/11/2004
  • Status: Active Grant
First Claim
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1. A method for delivering presence information regarding push-to-talk subscribers, the method comprising:

  • (a) receiving, from push-to-talk or presence server, presence information regarding a first push-to-talk subscriber, the presence information being destined for a second push-to-talk subscriber;

    (b) determining whether the second push-to-talk subscriber is available; and

    (c) in response to determining that the second push-to-talk subscriber is available, delivering, using a short message service message, the presence information to the second push-to-talk subscriber in a manner that bypasses a short message service center (SMSC) and a store and forward mechanism of SMS delivery implemented by the SMSC.

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