ETSI TS 123 379 V15.6.0 (2019-07)

ETSI TS 123 379 V15.6.0 (2019-07)






TECHNICAL SPECIFICATION
LTE;
Functional architecture and information flows to support
Mission Critical Push To Talk (MCPTT);
Stage 2
(3GPP TS 23.379 version 15.6.0 Release 15)

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3GPP TS 23.379 version 15.6.0 Release 15 1 ETSI TS 123 379 V15.6.0 (2019-07)



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3GPP TS 23.379 version 15.6.0 Release 15 2 ETSI TS 123 379 V15.6.0 (2019-07)
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3GPP TS 23.379 version 15.6.0 Release 15 3 ETSI TS 123 379 V15.6.0 (2019-07)
Contents
Intellectual Property Rights . 2
Legal Notice . 2
Modal verbs terminology . 2
Foreword . 10
1 Scope . 11
2 References . 11
3 Definitions, symbols and abbreviations . 12
3.1 Definitions . 12
3.2 Symbols . 13
3.3 Abbreviations . 13
4 Introduction . 15
5 Architectural requirements . 15
5.1 Media routing requirements . 15
5.2 Requirements for user identity management . 15
5.3 MCPTT group affiliation and MCPTT group de-affiliation . 15
5.4 MCPTT call requirements . 16
5.4.1 General . 16
5.4.2 Group call requirements . 16
5.5 GCS AS requirements for the MCPTT service . 16
5.6 Group selection . 16
5.7 Bearer management . 16
5.7.1 General . 16
5.7.2 EPS bearer considerations . 16
5.7.2.1 Void. 16
5.7.2.2 Void. 16
5.7.3 EPS unicast bearer considerations for MCPTT . 16
5.7.4 MBMS bearer management . 17
5.8 MCPTT system interconnect requirements . 17
6 Involved business relationships . 17
7 Functional model . 17
7.1 General . 17
7.2 Description of the planes . 17
7.3 Functional model description . 18
7.3.1 On-network functional model . 18
7.3.2 Off-network functional model . 19
7.4 Functional entities description . 20
7.4.1 General . 20
7.4.2 Application plane of MCPTT service . 20
7.4.2.1 General . 20
7.4.2.2 Common services core . 20
7.4.2.3 MCPTT application service . 20
7.4.2.3.1 MCPTT client . 20
7.4.2.3.2 MCPTT server . 20
7.4.2.3.3 Floor participant . 22
7.4.2.3.4 Floor control server . 22
7.4.2.3.5 Media distribution function . 22
7.4.2.3.6 Media mixer . 22
7.4.2.3.7 MCPTT user database . 23
7.4.2.3.8 MC gateway server . 23
7.4.3 Signalling control plane . 23
7.5 Reference points . 23
7.5.1 General reference point principle . 23
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3GPP TS 23.379 version 15.6.0 Release 15 4 ETSI TS 123 379 V15.6.0 (2019-07)
7.5.2 Application plane of MCPTT service . 23
7.5.2.1 General . 23
7.5.2.2 Reference point MCPTT-1 (between the MCPTT client and the MCPTT server). 23
7.5.2.3 Reference point MCPTT-2 (between the MCPTT server and the MCPTT user database) . 24
7.5.2.4 Reference point MCPTT-3 (between the MCPTT server and the MCPTT server and between the
MCPTT server and the MC gateway server) . 24
7.5.2.5 Reference point MCPTT-4 (unicast between the floor control server and the floor participant) . 24
7.5.2.6 Reference point MCPTT-5 (between the media distribution function and the EPS) . 24
7.5.2.7 Reference point MCPTT-6 (between the MCPTT server and the EPS) . 24
7.5.2.8 Reference point MCPTT-7 (unicast between the media distribution function and the media
mixer) . 25
7.5.2.9 Reference point MCPTT-8 (multicast between the media distribution function and the media
mixer) . 25
7.5.2.10 Reference point MCPTT-9 (multicast between the floor control server and the floor participant) . 25
7.5.2.11 Reference point IWF-1 (between the MCPTT server and the interworking function to legacy
s yste ms) . 25
7.5.2.12 Reference points of common services core used in the MCPTT service . 25
7.5.2.13 Reference point MCPTT-10 (between the MC gateway server and the MC gateway server in a
different MCPTT system) . 25
8 Identities . 25
9 Application of functional model to deployments . 25
10 Procedures and information flows . 26
10.1 MCPTT service configuration . 26
10.2 User authentication and authorization for MCPTT service . 26
10.3 Affiliation and de-affiliation to/from MCPTT group(s) . 26
10.3a Activation and de-activation of/from functional alias(es) . 27
10.4 MCPTT group selection . 27
10.4.1 General . 27
10.4.2 Information flows for group selection . 27
10.4.2.1 Group selection change request. 27
10.4.2.2 Group selection change response . 27
10.4.2.3 Group selection change notification . 28
10.4.3 Authorized user remotely changes another MCPTT user's selected MCPTT group – mandatory mode . 28
10.5 Pre-established session (on-network) . 29
10.5.1 General . 29
10.5.2 Information flows for pre-established session . 29
10.5.2.1 Pre-established session establishment . 29
10.5.2.2 Pre-established session modification . 30
10.5.2.3 Pre-established session release - client initiated . 30
10.5.2.4 Pre-established session release - server initiated . 31
10.5.2.5 Pre-established session call connect request . 31
10.5.2.6 Pre-established session call disconnect request . 31
10.5.3 Procedures. 32
10.5.3.1 General . 32
10.5.3.2 Call connect and disconnect procedures using pre-established session . 32
10.5.3.2.1 Call connect over unicast . 32
10.5.3.2.2 Call disconnect over unicast . 33
10.6 Group call . 33
10.6.1 General . 33
10.6.2 On-network group call . 33
10.6.2.1 General . 33
10.6.2.2 Information flows for group call in on-network . 33
10.6.2.2.1 MCPTT emergency group call request . 33
10.6.2.2.1a MCPTT emergency group call response . 34
10.6.2.2.2 MCPTT in-progress emergency group state cancel request . 34
10.6.2.2.2a MCPTT in-progress emergency group state cancel response . 34
10.6.2.2.3 MCPTT emergency alert request . 35
10.6.2.2.3a MCPTT emergency alert response . 35
10.6.2.2.3b MCPTT emergency alert area trigger . 36
10.6.2.2.4 MCPTT emergency alert cancel request . 36
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3GPP TS 23.379 version 15.6.0 Release 15 5 ETSI TS 123 379 V15.6.0 (2019-07)
10.6.2.2.4a MCPTT emergency alert cancel response . 36
10.6.2.2.5 MCPTT imminent peril group call request . 36
10.6.2.2.5a MCPTT imminent peril group call response . 37
10.6.2.2.6 MCPTT in-progress imminent peril group state cancel request . 37
10.6.2.2.6a MCPTT in-progress imminent peril group state cancel response . 37
10.6.2.2.7 Group call request (MCPTT client – MCPTT server) . 38
10.6.2.2.8 Group call request (MCPTT server – MCPTT server) . 38
10.6.2.2.9 Group call request (MCPTT server – MCPTT client) . 39
10.6.2.2.10 Group call response (MCPTT server – MCPTT client) . 39
10.6.2.2.11 Group call response (MCPTT server – MCPTT server) . 39
10.6.2.2.12 Group call response (MCPTT client – MCPTT server) . 39
10.6.2.2.13 Group call notify (MCPTT server – MCPTT client) . 40
10.6.2.2.14 Group call release request (MCPTT server – MCPTT client) . 40
10.6.2.2.14a Group call release request (MCPTT client – MCPTT server) . 40
10.6.2.2.15 Group call release request (MCPTT server – MCPTT server) . 41
10.6.2.2.16 Group call release response (MCPTT client – MCPTT server) . 41
10.6.2.2.17 Group call release response (MCPTT server – MCPTT server) . 41
10.6.2.2.18 Group call rejoin request (MCPTT client – MCPTT server) . 42
10.6.2.2.19 Group call rejoin response (MCPTT server – MCPTT client) . 42
10.6.2.2.20 Group join request (MCPTT client – MCPTT server) . 42
10.6.2.2.21 Group join response (MCPTT server – MCPTT client) . 43
10.6.2.2.22 Group call leave request (MCPTT server – MCPTT client) . 43
10.6.2.2.23 Group call leave response (MCPTT client – MCPTT server) . 44
10.6.2.2.24 Group interrogate request (MCPTT server – MCPTT server) . 44
10.6.2.2.25 Group interrogate response (MCPTT server – MCPTT server) . 44
10.6.2.2.26 Group-broadcast group call request (MCPTT client – MCPTT server) . 44
10.6.2.2.27 Group-broadcast group call request (MCPTT server – MCPTT client) . 45
10.6.2.2.28 Group-broadcast group call response (MCPTT client – MCPTT server) . 45
10.6.2.2.29 Group-broadcast group call response (MCPTT server – MCPTT client) . 46
10.6.2.2.30 Group-broadcast group call release request (MCPTT client – MCPTT server) . 46
10.6.2.2.31 Group-broadcast group call release request (MCPTT server – MCPTT client) . 46
10.6.2.2.32 Group-broadcast group call release response (MCPTT server – MCPTT client) . 46
10.6.2.2.33 Group-broadcast group call release response (MCPTT client – MCPTT server) . 47
10.6.2.3 Group call within one MCPTT system. 47
10.6.2.3.1 Group call models. 47
10.6.2.3.1.1 Pre-arranged group call . 47
10.6.2.3.1.2 Chat group call . 52
10.6.2.3.2 Exiting group call due to de-affiliation . 57
10.6.2.4 Group call involving groups from multiple MCPTT systems . 58
10.6.2.4.1 Group call for temporary groups across multiple MCPTT systems . 58
10.6.2.4.1.1 Group call setup . 58
10.6.2.4.1.2 Group call release . 60
10.6.2.4.2 Group call for temporary group formed by group regroup procedure involving multiple
MCPTT systems via trusted mode . 61
10.6.2.4.3 Group call for an MCPTT group defined in the partner MCPTT system . 63
10.6.2.4.3.1 Group call setup procedure – initiating side . 63
10.6.2.4.3.2 Group call setup – terminating side . 64
10.6.2.4.4 Merging of groups involving multiple MCPTT systems . 65
10.6.2.5 Broadcast group call . 66
10.6.2.5.1 General . 66
10.6.2.5.2 Common broadcast group call procedure . 66
10.6.2.5.2.1 Group-broadcast group call procedure . 67
10.6.2.5.2.2 Group-broadcast group call procedure when a subordinate group has an on-going MCPTT
emergency group call . 69
10.6.2.5.2.3 Group-broadcast group call release procedure . 70
10.6.2.5.2.4 Server-initiated broadcast group call release procedure. 71
10.6.2.5.3 Temporary group – broadcast group call procedure . 72
10.6.2.6 Emergency and imminent peril procedures . 73
10.6.2.6.1 MCPTT emergency group call .
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