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Method and Apparatus for Maintaining Information at an Ims Client

  • US 20080256177A1
  • Filed: 09/15/2005
  • Published: 10/16/2008
  • Est. Priority Date: 09/15/2005
  • Status: Abandoned Application
First Claim
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1. A method of synchronizing data stored at an IP Multimedia Subsystem client with data stored at a SIP application server of the IP Multimedia Subsystem, the method comprising:

  • receiving at the application server, a SIP SUBSCRIBE request sent from the client, said request requesting data stored at the application serve;

    determining whether the request contains within a header thereof, an indication of the current state of the data stored at the client;

    if the request does not contain the indication, sending all of said data from the SIP application server to the client within a SIP NOTIFY message; and

    if the request does contain the indication, determining at the application server, from the condition, whether the data stored at the client differs from the data stored at the SIP application server and, if yes, sending the requested data to the client within a SIP NOTIFY message.

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