ETSI TS 123 283 V15.1.0 (2018-07)

TECHNICAL SPECIFICATION
LTE;
Mission Critical Communication Interworking
with Land Mobile Radio Systems
(3GPP TS 23.283 version 15.1.0 Release 15)

3GPP TS 23.283 version 15.1.0 Release 15 1 ETSI TS 123 283 V15.1.0 (2018-07)

Reference
RTS/TSGS-0623283vf10
Keywords
LTE
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3GPP TS 23.283 version 15.1.0 Release 15 2 ETSI TS 123 283 V15.1.0 (2018-07)
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Foreword
This Technical Specification (TS) has been produced by ETSI 3rd Generation Partnership Project (3GPP).
The present document may refer to technical specifications or reports using their 3GPP identities, UMTS identities or
GSM identities. These should be interpreted as being references to the corresponding ETSI deliverables.
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Modal verbs terminology
In the present document "shall", "shall not", "should", "should not", "may", "need not", "will", "will not", "can" and
"cannot" are to be interpreted as described in clause 3.2 of the ETSI Drafting Rules (Verbal forms for the expression of
provisions).
"must" and "must not" are NOT allowed in ETSI deliverables except when used in direct citation.
ETSI
3GPP TS 23.283 version 15.1.0 Release 15 3 ETSI TS 123 283 V15.1.0 (2018-07)
Contents
Intellectual Property Rights . 2
Foreword . 2
Modal verbs terminology . 2
Foreword . 8
1 Scope . 9
2 References . 9
3 Definitions, symbols and abbreviations . 9
3.1 Definitions . 9
3.2 Abbreviations . 10
4 Introduction . 10
5 Assumptions and architectural requirements . 10
5.1 Key management . 10
5.2 Packet format . 11
6 Involved business relationships . 11
7 Functional model . 11
7.1 General . 11
7.2 Functional model description . 11
7.3 Functional entities description . 12
7.3.1 IWF . 12
7.4 Reference points . 12
7.4.1 Reference point IWF-1 (between the IWF and the MCPTT server) . 12
7.4.2 Reference point IWF-2 (between the IWF and the MCData server) . 12
7.4.3 Reference point IWF-3 (between the IWF and the group management server) . 13
8 Identities . 13
8.1 Identity mapping . 13
9 Application of functional model to deployments . 13
10 Procedures and information flows . 13
10.1 Affiliation . 13
10.1.1 Information flows for affiliation . 13
10.1.1.1 General . 13
10.1.1.2 IWF group affiliation request . 13
10.1.1.3 IWF group affiliation response . 14
10.1.1.4 IWF group de-affiliation request . 14
10.1.1.5 IWF group de-affiliation response . 14
10.1.2 Affiliation procedures . 15
10.1.2.1 General . 15
10.1.2.2 Group affiliation to a group defined in the MC system . 16
10.1.2.3 Group de-affiliation from a group defined in the MC system . 17
10.1.2.4 Group affiliation to group defined in the LMR system . 17
10.1.2.5 Group de-affiliation from a group defined in the LMR system . 19
10.2 Group management . 20
10.2.1 Information flows for group management . 20
10.2.1.1 General . 20
10.2.1.2 IWF group regroup teardown notification . 20
10.2.1.3 IWF group regroup teardown notification response . 20
10.2.1.4 IWF group regroup request . 20
10.2.1.5 IWF group regroup response . 20
10.2.1.6 IWF group regroup notification . 20
10.2.1.7 IWF group regroup notification response . 21
10.2.1.8 IWF group information request . 21
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10.2.1.9 IWF group information response . 21
10.2.1.10 IWF group information provision request . 21
10.2.1.11 IWF group information provision response . 22
10.2.1.12 IWF group information subscribe request . 22
10.2.1.13 IWF group information subscribe response . 22
10.2.1.14 IWF group information notify request . 22
10.2.1.15 IWF group information notify response . 23
10.2.2 Group regrouping . 23
10.2.2.1 General . 23
10.2.2.2 MC system initiates the group regroup . 23
10.2.2.3 IWF initiates the group regroup . 25
10.2.2.4 Ownership of the group regroup . 26
10.2.2.5 Simultaneous group regroup requests from each side of the IWF-1 interface . 26
10.2.2.6 Resolution of vocoder and encryption mode for the group regroup . 26
10.2.3 Group configuration for interworking. 26
10.2.3.1 Overview . 26
10.2.3.2 MC system provides group configuration to the IWF . 26
10.2.3.3 IWF requests group configuration from the MC system . 27
10.2.3.4 IWF provides group configuration to the MC system . 28
10.2.3.5 MC system requests group configuration from the IWF . 29
10.2.3.6 IWF subscribes to group configuration . 29
10.2.3.7 MC system notifies group configuration . 30
10.2.3.8 MC system subscribes to group configuration . 30
10.2.3.9 IWF notifies group configuration . 31
10.3 Group call . 31
10.3.1 General . 31
10.3.2 Information flows for group call over interworking group . 32
10.3.2.1 General . 32
10.3.2.2 IWF group call request . 32
10.3.2.3 IWF group call response (IWF – MCPTT server) . 32
10.3.2.4 IWF Group-broadcast group call setup request . 32
10.3.2.5 IWF Group-broadcast group call setup response . 33
10.3.2.6 IWF Group-broadcast group call release request . 33
10.3.2.7 IWF group-broadcast group call release response . 33
10.3.2.8 IWF group join request . 34
10.3.2.9 IWF group join response . 34
10.3.2.10 IWF group call leave request . 34
10.3.2.11 IWF group call leave response . 35
10.3.2.12 IWF group call release request . 35
10.3.2.13 IWF group call release response . 35
10.3.3 Pre-arranged group call . 35
10.3.3.1 General . 35
10.3.3.2 Group call setup initiated by MCPTT user on an interworking group defined in MCPTT system . 36
10.3.3.3 Group call setup initiated by LMR user on an interworking group defined in MCPTT system. . 37
10.3.3.4 Group call setup initiated by MCPTT user on an interworking group defined in the LMR system . 38
10.3.3.5 Group call setup initiated by LMR user on an interworking group defined in the LMR system. . 40
10.3.3.6 Encrypted group call with transcoding . 41
10.3.3.7 Late Entry . 43
10.3.3.7.1 General . 43
10.3.3.7.2 Group call late entry on an interworking group defined in the MCPTT system . 43
10.3.3.7.3 Group call late entry on an interworking group defined in the LMR system . 44
10.3.3.8 Interworking group call release . 45
10.3.3.8.1 General . 45
10.3.3.8.2 Group call release on an interworking group defined in the MCPTT system. 46
10.3.3.8.3 Group call release on an interworking group defined in the LMR system . 47
10.3.4 Group broadcast . 48
10.3.4.1 General . 48
10.3.4.2 Group-broadcast group call procedure with an interworking group where the group-broadcast
group is defined in the MCPTT system. 48
10.3.4.3 Group-broadcast group call procedure with an interworking group where the group-broadcast
group is defined in the LMR system . 51
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10.3.4.4 Group-broadcast group call release with an interworking group procedure where the group-
broadcast group is defined in the MCPTT system . 53
10.3.4.5 Group-broadcast group call release with an interworking group procedure where the group-
broadcast group is defined in the LMR system . 55
10.3.5 Chat group call . 56
10.3.5.1 General . 56
10.3.5.2 MCPTT user initiated chat group call in an interworking group defined in LMR system . 56
10.3.5.3 LMR user initiated chat group call in an interworking group defined in MCPTT system . 57
10.3.5.4 Release chat group call on an interworking group defined in the LMR system . 58
10.3.5.5 Release chat group call on an interworking group defined in the MCPTT system . 59
10.3.5.6 void . 60
10.3.5.7 void . 60
10.3.6 Exiting group call due to de-affiliation . 60
10.3.6.1 General . 60
10.3.6.2 Exiting group call defined in the LMR system due to de-affiliation . 60
10.3.6.3 Exiting group call defined in the MCPTT system due to de-affiliation . 61
10.4 Private call . 61
10.4.1 Information flows for private calls . 61
10.4.1.1 General . 61
10.4.1.2 IWF private call request . 62
10.4.1.3 IWF private call response . 62
10.4.1.4 IWF ringing . 62
10.4.1.5 IWF call end request . 63
10.4.1.6 IWF call end response . 63
10.4.2 Private call setup in automatic commencement mode . 63
10.4.2.1 MCPTT user initiating an MCPTT private call . 63
10.4.2.2 LMR user initiating a private call with MCPTT user . 65
10.4.3 Private call setup in manual commencement mode . 66
10.4.3.1 MCPTT user is initiating an MCPTT private call . 66
10.4.3.2 LMR user initiating a private call with MCPTT user . 68
10.4.4 Private call release . 69
10.4.4.1 MCPTT client initiated . 69
10.4.4.2 MCPTT server initiated . 70
10.4.4.3 LMR user initiated . 71
10.4.5 Encryption of private calls . 72
10.5 Floor control . 72
10.5.1 General . 72
10.5.2 Information flows for floor control . 73
10.5.2.1 General . 73
10.5.2.2 IWF floor request . 73
10.5.2.3 IWF floor granted . 73
10.5.2.4 IWF floor rejected . 73
10.5.2.5 IWF floor request cancel . 73
10.5.2.6 IWF floor request cancel response . 74
10.5.2.7 IWF floor request cancel notify . 74
10.5.2.8 IWF floor idle . 74
10.5.2.9 IWF floor release . 74
10.5.2.10 IWF floor taken . 75
10.5.2.11 IWF floor revoked . 75
10.5.2.12 IWF floor acknowledgement . 75
10.5.2.13 IWF queue position request. 75
10.5.2.14 IWF queue position info . 76
10.5.2.15 IWF unicast media stop request . 76
10.5.2.16 IWF unicast media resume request . 76
10.5.3 Interworking floor control . 76
10.5.4 Floor override without using floor revoked on an interworking group . 77
10.5.5 Floor control on an interworking group homed in the LMR system . 78
10.5.6 Floor control on an interworking group homed in the MCPTT system . 80
10.5.7 Floor control without local filtering on an interworking group defined in the LMR system . 81
10.5.8 Floor control without local filtering on an interworking group defined in the MCPTT system . 82
10.6 Emergency and imminent peril . 84
10.6.1 Information flows for emergency and imminent peril . 84
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10.6.1.1 IWF emergency group call request . 84
10.6.1.2 IWF emergency group call response . 84
10.6.1.3 IWF imminent peril group call request . 84
10.6.1.4 IWF imminent peril group call response . 84
10.6.1.5 IWF in-progress imminent peril group state cancel request . 85
10.6.1.6 IWF in-progress imminent peril group state cancel response . 85
10.6.1.7 IWF emergency alert request . 85
10.6.1.8 IWF emergency alert response . 85
10.6.1.9 IWF emergency alert cancel request . 86
10.6.1.10 IWF emergency alert cancel response . 86
10.6.1.11 IWF in-progress emergency group state cancel request . 86
10.6.1.12 IWF in-progress emergency group state cancel response . 87
10.6.2 Emergency calls . 87
10.6.2.1 General . 87
10.6.2.2 Emergency group call . 87
10.6.2.2.1 Emergency group call setup initiated by a user in the LMR system on an interworking group
defined in the MCPTT system . 87
10.6.2.2.2 Emergency group call setup initiated by a user in the MCPTT system on an interworking
group defined in MCPTT system . 89
10.6.2.2.3 Emergency group call setup initiated by a user in the LMR system on an interworking group
defined in the LMR system . 91
10.6.2.2.4 Emergency group call setup initiated by a user in the MCPTT system to an interworking
group defined in the LMR system . 92
10.6.2.3 In-progress emergency group state cancel of an interworking group . 94
10.6.2.3.1 LMR user initiated in-progress emergency group state cancel of an interworking group
defined in the MCPTT system . 94
10.6.2.3.2 MCPTT user initiated in-progress emergency group state cancel of an interworking group
defined in the MCPTT system . 95
10.6.2.3.3 LMR user initiated in-progress emergency group state cancel of an interworking group
defined in an LMR system. 96
10.6.2.3.4 MCPTT user initiated in-progress emergency group state cancel of an interworking group
defined in an LMR system. 97
10.6.2.4 Losing audio . 98
10.6.2.5 Default emergency group . 99
10.6.2.6 Emergency private call . 99
10.6.2.7 LMR systems that do not track group emergencies . 99
10.6.3 Imminent peril calls . 99
10.6.3.1 General . 99
10.6.3.2 Imminent peril group call initiated by an MCPTT user on an interworking group . 99
10.6.3.3 Group call initiated by a user in the LMR system on an interworking group in imminent peril
state . 101
10.6.3.4 In-progress imminent peril state cancel on an interworking group . 102
10.6.4 Emergency alerts . 104
10.6.4.1 Emergency alert initiated by LMR user . 104
10.6.4.2 Emergency alert initiated by MC service user . 106
10.6.5 Emergency alert cancellation . 107
10.6.5.1 Emergency alert cancellation of an LMR user . 107
10.6.5.2 Emergency alert cancellation of an MC service user . 108
10.7 Codec . 110
10.7.1 Information flows for codec. 110
10.7.1.1 IWF codec reconciliation request . 110
10.7.1.2 IWF codec reconciliation response . 110
10.7.2 IWF transcoding . 110
10.7.3 Codec negotiation by the LMR system . 110
10.7.3.1 Description . 110
10.8 MCData short data service . 111
10.8.1 General . 111
10.8.2 Information flows for the short data service . 112
10.8.2.1 General . 112
10.8.2.2 IWF MCData standalone data request. 112
10.8.2.3 IWF MCData data disposition notification . 112
10.8.2.4 IWF MCData group standalone data request (IWF – MCData server) . 113
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10.8.2.5 IWF MCData group standalone data request (MCData server - IWF) . 113
10.8.2.6 IWF MCData data disposition notification(s) (MCData server to IWF) . 113
10.8.2.7 IWF MCData group standalone data request (IWF – MCData server) . 114
10.8.2.8 IWF MCData group standalone data request (MCData server – IWF) . 114
10.8.2.9 IWF MCData group standalone data response . 115
10.8.3 Behaviour at the MCData Client . 115
10.8.4 Behaviour at the IWF . 115
10.8.5 Behaviour at the MCData server . 115
10.8.6 MCData user one-to-one SDS request to an LMR user . 115
10.8.6.1 Signalling control plane . 115
10.8.6.2 Media plane . 116
10.8.7 LMR user one-to-one SDS request to an MCData user . 116
10.8.7.1 Signalling control plane . 116
10.8.7.2 Media plane . 116
10.8.8 MCData user group SDS request to an MCData group including LMR users . 116
10.8.8.1 Signalling control plane . 116
10.8.8.2 Media plane . 116
10.8.9 LMR user group SDS request to an MCData group . 116
10.8.9.1 Signalling control plane . 116
10.8.9.2 Media plane . 116
10.9 IWF as a security gateway . 117
10.9.1 Support for transcoding with encrypted speech . 117
10.10 Simultaneous interworked calls (on-network) . 117
10.10.1 General . 117
10.11 Location . 117
10.11.1 Location of current talker . 117
10.11.2 Location of current talker (MCPTT server to IWF) . 117
10.11.3 Location of current talker (IWF to MCPTT server) . 118
10.12 LMR security transport . 119
10.12.1 Information flows for LMR security transport. 119
10.12.1.1 Non-3GPP security message request . 119
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