Method and Apparatus for Establishing a POC Session
First Claim
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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Abstract
According to a first aspect of the present invention there is provided 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 comprises 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, the TBCP or MBCP message containing the PoC address of the at least one invited PoC client. 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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Citations
6 Claims
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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:
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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. - View Dependent Claims (2, 3, 4)
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5. An apparatus configured to operate as a Push-to-talk over Cellular (PoC) client, the apparatus comprising:
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a negotiating unit for negotiating media parameters with a participating PoC server of the PoC client using the pre-established session procedure; and a PoC session initiation unit for generating and sending a Talk Burst Control Protocol (TBCP) or Media Burst Control Protocol (MBCP) message directly to said participating PoC server in order to initiate a PoC communication session, the TBCP or MBCP message containing the PoC address of at least one other PoC client.
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6. An apparatus configured to operate as a Push-to-talk over Cellular (PoC) server, the apparatus comprising:
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a negotiating unit for negotiating media parameters with a PoC Client using the pre-established session procedure; and a PoC session processing unit for receiving a Talk Burst Control Protocol (TBCP) or Media Burst Control Protocol (MBCP) message from said PoC client initiating a PoC communication session, the TBCP or MBCP message comprising the PoC addresses of at least one other PoC client, and in response generating a SIP INVITE message using said negotiated parameters and sending the SIP INVITE message towards a participating PoC server for the at least one other PoC client.
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Specification