originating MCPTT client to originating participating MCPTT function (O-PF)

Request-URI contains the PSI for the private call service.

P-Preferred-Identity may contain IMPU of originating user

MCPTT ID of called user (resource-lists)

PSI for private call is configured on the client.

O-PF to controlling MCPTT function (CF)

Request-URI contains the PSI for the private call service.

P-Asserted-Identity contains IMPU of originating user.

MCPTT ID of called user (resource-lists)

MCPTT ID of calling user contained in "mcptt-calling-user-id" (mcptt-info)

–

CF to terminating participating MCPTT function (T-PF)

Request-URI contains the address of the T-PF.

P-Asserted-Identity contains IMPU of originating user.

MCPTT ID of calling user contained in "mcptt-calling-user-id" (mcptt-info).

MCPTT ID of called user contained in "mcptt-called-party-id" (mcptt-info).

If the terminator is in another domain, the CF can map the MCPTT ID of the terminator to a PSI identifying an interrogating function in the partner network that is able to find the T-PF using the MCPTT ID.

T-PF to terminating MCPTT client

Request-URI contains the IMPU of the terminating user.

P-Asserted-Identity contains IMPU of originating user.

MCPTT ID of calling user contained in "mcptt-calling-user-id" (mcptt-info).

MCPTT ID of called user contained in "mcptt-called-party-id" (mcptt-info).

–

terminating MCPTT client to T-PF (response)

as in TS 24.229

"mcptt-called-party-id" contains contacted client’s MCPTT ID (mcptt-info).

–

T-PF to CF (response)

as in TS 24.229

"mcptt-called-user" contains contacted client’s MCPTT ID (mcptt-info).

–

CF to O-PF (response)

as in TS 24.229

"mcptt-called-party-id" contains contacted client’s MCPTT ID (mcptt-info).

–

O-PF to originating MCPTT client (response)

as in TS 24.229

"mcptt-called-party-id" contains contacted client’s MCPTT ID (mcptt-info).

–