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TS 24.379 (CT1)
Mission Critical Push To Talk (MCPTT) Call Control –
Protocol specification

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(P) V14.3.0    2017/09    535 p.
(P) V13.6.0    2017/09    479 p.


Rapporteur:  Mr. Kaura, Ricky
See also:  MCPTT-related TS/TR    


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.


 

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1   Scope [R13]   PDF-p. 23
2   References [R13]
3   Definitions, symbols and abbreviations [R13]   PDF-p. 26
4   General [R13]   PDF-p. 29
5   Functional entities [R13]   PDF-p. 46
6   Common procedures [R13]
6.1   Introduction
6.2   MCPTT client procedures   PDF-p. 51
6.2.0   Distinction of requests at the MCPTT client
6.2.1   SDP offer generation   PDF-p. 52
6.2.2   SDP answer generation
6.2.3   Commencement modes   PDF-p. 53
6.2.4   Leaving an MCPTT session initiated by MCPTT client   PDF-p. 55
6.2.5   Releasing an MCPTT session initiated by MCPTT client   PDF-p. 56
6.2.6   Receiving an MCPTT session release request
6.2.7   Void
6.2.8   Priority call conditions   PDF-p. 57
6.2.8.0   General [R14]
6.2.8.1   MCPTT emergency group call conditions
6.2.8.1.1   SIP INVITE request or SIP REFER request for originating MCPTT emergency group calls
6.2.8.1.2   Resource-Priority header field for MCPTT emergency group calls   PDF-p. 58
6.2.8.1.3   SIP re-INVITE request for cancelling MCPTT in-progress emergency group state
6.2.8.1.4   Receiving a SIP 2xx response to a SIP request for a priority call   PDF-p. 59
6.2.8.1.5   Receiving a SIP 4xx response, SIP 5xx response or SIP 6xx response to a SIP request for a priority group call   PDF-p. 60      Up
6.2.8.1.6   Determining authorisation for initiating or cancelling an MCPTT emergency alert
6.2.8.1.7   Determining authorisation for cancelling the in-progress emergency state of an MCPTT group
6.2.8.1.8   Determining authorisation for originating a priority group call   PDF-p. 61
6.2.8.1.9   SIP request for originating MCPTT imminent peril group calls
6.2.8.1.10   Determining authorisation for cancelling an imminent peril group call   PDF-p. 62
6.2.8.1.11   SIP re-INVITE request for cancelling MCPTT in-progress imminent peril group state
6.2.8.1.12   Resource-Priority header field for MCPTT imminent peril group calls
6.2.8.1.13   Receiving a SIP INFO request in the dialog of a SIP request for a priority group call   PDF-p. 63
6.2.8.1.14   SIP re-INVITE request for cancelling the in-progress emergency group state of a group by a third-party   PDF-p. 64
6.2.8.1.15   Retrieving Resource-Priority header field values      Up
6.2.8.1.16   Handling receipt of a SIP re-INVITE request for priority group call origination status within a pre-established session   PDF-p. 65
6.2.8.1.17   Priority group call conditions upon receiving call release   PDF-p. 66
6.2.8.1.18   Emergency private call conditions upon receiving call release
6.2.8.2   Request for an originating broadcast group call
6.2.8.3   MCPTT emergency private call conditions   PDF-p. 67
6.2.9   Location information   PDF-p. 72

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