11.1.4 Ending the private call initiated by the MCPTT server

24.3793GPPMission Critical Push To Talk (MCPTT) call controlProtocol specificationRelease 18TS

11.1.4.1 General

This clause describes the procedures of each functional entity for ending the private call initiated by the MCPTT server.

NOTE: For private call without floor control, ending the private call is initiated only by the MCPTT client.

11.1.4.2 MCPTT client procedures

Upon receiving a SIP BYE request for private call session, the MCPTT client shall follow the procedures as specified in clause 6.2.6.

11.1.4.3 Participating MCPTT function procedures

11.1.4.3.1 Originating procedures

When the MCPTT session for private call needs to be released as specified in clause 6.3.8.2, the participating MCPTT function shall follow the procedures in clause 6.3.3.1.5.

11.1.4.3.2 Terminating procedures

11.1.4.3.2.1 Receipt of SIP BYE request for private call on-demand

Upon receiving a SIP BYE request from the controlling MCPTT function, the participating MCPTT function shall follow the procedures as specified in clause 6.3.2.2.8.1.

11.1.4.3.2.2 Receipt of SIP BYE request when ongoing pre-established session

Upon receiving a SIP BYE request from the controlling MCPTT function and if the MCPTT session id refers to an MCPTT user that has a pre-established session with the participating MCPTT function, the participating MCPTT function shall follow the procedures in clause 11.1.3.2.2.2.

11.1.4.4 Controlling MCPTT function procedures

When the MCPTT session for private call needs to be released as specified in clause 6.3.8.2, the controlling MCPTT function shall follow the procedures in clause 6.3.3.1.5.