This document specifies the session control protocols needed to support Mission Critical Push To Talk (MCPTT). This document specifies both on-network and off-network protocols.
Mission critical communication services are services that require preferential handling compared to normal telecommunication services, e.g. in support of police or fire brigade.
The MCPTT service can be used for public safety applications and also for general commercial applications (e.g., utility companies and railways).
This document is applicable to User Equipment (UE) supporting the MCPTT client functionality, and to application servers supporting the MCPTT server functionality.
for V13, V14, V15:
(F) Correction and clarification of XML integrity protection
| (F) Location correction for emergency alert
| (F) Addition of missing warning code 136 for I_MESSAGE authentication failure
| (F) Four most significant bits of PCK-ID
| (F) Off-network call type control procedures: merge of two calls
| (F) Off-network Broadcast group call procedures
for V14, V15:
(F) Replace obsolete references to 33.179 with updated references to 33.180
| (F) Introduction of MuSiK for alignment with Rel-14 security procedures
| (F) Removal of MKFC processing as part of replacing MKFC wit h MuSiK
(B) Remotely initiated group call client procedures
| (B) Remotely initiated group call server procedures
| (B) Remotely initiated private call client procedures
| (B) Remotely initiated private call server procedures