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Method and Apparatus for Establishing a POC Session

  • US 20110231558A1
  • Filed: 09/19/2008
  • Published: 09/22/2011
  • Est. Priority Date: 09/19/2008
  • Status: Active Grant
First Claim
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1. A method of establishing a Push-to-talk over Cellular (PoC) communication session between an inviting PoC client and at least one invited PoC client using an IP Multimedia Subsystem network, the method comprising:

  • using the pre-established session procedure to negotiate media parameters between the inviting PoC client and a participating PoC server for the inviting PoC client;

    at the inviting PoC client, sending a Talk Burst Control Protocol (TBCP) or Media Burst Control Protocol (MBCP) message directly to its participating PoC server in order to initiate the PoC communication session, the TBCP or MBCP message containing the PoC address of the at least one invited PoC client; and

    at said participating PoC Server, in response to receipt of the TBCP or MBCP message, generating a SIP INVITE message and sending the SIP INVITE message towards a participating PoC server for the at least one invited PoC client.

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