ETSI TS 129 379 V16.1.1 (2020-11)

LTE; 5G; Mission Critical Push To Talk (MCPTT) call control interworking with Land Mobile Radio (LMR) systems; Stage-3 (3GPP TS 29.379 version 16.1.1 Release 16)

RTS/TSGC-0129379vg11

General Information

• Status: Not Published
• Technical Committee: 3GPP CT 1 - MM/CC/SM [lu] (formely CN1)
• Current Stage: 12 - Completion
• Completion Date: 05-Nov-2020

Standards Content (Sample)

ETSI TS 129 379 V16.1.1 (2020-11)






TECHNICAL SPECIFICATION
LTE;
5G;
Mission Critical Push To Talk (MCPTT) call control
interworking with Land Mobile Radio (LMR) systems;
Stage-3
(3GPP TS 29.379 version 16.1.1 Release 16)

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3GPP TS 29.379 version 16.1.1 Release 16 1 ETSI TS 129 379 V16.1.1 (2020-11)



Reference
RTS/TSGC-0129379vg11
Keywords
5G,LTE
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3GPP TS 29.379 version 16.1.1 Release 16 2 ETSI TS 129 379 V16.1.1 (2020-11)
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ETSI

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3GPP TS 29.379 version 16.1.1 Release 16 3 ETSI TS 129 379 V16.1.1 (2020-11)
Contents
Intellectual Property Rights . 2
Legal Notice . 2
Modal verbs terminology . 2
Foreword . 9
1 Scope . 11
2 References . 11
3 Definitions of terms, symbols and abbreviations . 12
3.1 Terms . 12
3.2 Abbreviations . 13
4 General . 13
4.1 IWF overview . 13
4.2 Warning Header Field . 13
4.2.1 General . 13
4.2.2 Warning texts . 13
4.3 MCPTT priority calls and alerts . 13
4.4 Media security at the IWF . 13
4.5 Broadcast group calls . 14
5 Functional entities . 14
5.1 General . 14
5.2 Functional connectivity models . 15
6 Call control common procedures . 17
6.1 SDP . 17
6.1.1 SDP offer generation . 17
6.1.2 SDP answer generation . 17
6.2 Commencement modes . 18
6.2.1 Automatic commencement mode for private calls . 18
6.2.2 Manual commencement mode for private calls . 18
6.3 Receiving an MCPTT session release request . 19
6.4 Priority call conditions . 19
6.4.1 MCPTT emergency group call conditions . 19
6.4.1.1 SIP INVITE request for originating MCPTT emergency group calls . 19
6.4.1.2 Resource-Priority header field for MCPTT emergency group calls . 20
6.4.1.3 SIP re-INVITE request for cancelling MCPTT in-progress emergency group state . 20
6.4.1.4 Receiving a SIP 2xx response to a SIP request for a priority call . 21
6.4.1.5 Receiving a SIP 4xx response, SIP 5xx response or SIP 6xx response to a SIP request for a
priority group call . 22
6.4.1.6 SIP request for originating MCPTT imminent peril group calls . 22
6.4.1.7 SIP re-INVITE request for cancelling MCPTT in-progress imminent peril group state . 22
6.4.1.8 Resource-Priority header field for MCPTT imminent peril group calls . 23
6.4.1.9 Receiving a SIP INFO request in the dialog of a SIP request for a priority group call . 23
6.4.1.10 SIP re-INVITE request for cancelling the in-progress emergency group state of a group by a
third-party. 24
6.4.1.11 Resource-Priority header field values . 24
6.4.2 MCPTT emergency private call conditions . 25
6.4.2.1 SIP request for originating MCPTT emergency private calls . 25
6.4.2.2 Resource-Priority header field for MCPTT emergency private calls . 25
6.4.2.3 SIP re-INVITE request for cancelling MCPTT emergency private call state . 25
6.5 Location information . 26
6.5.1 Location information for location reporting . 26
6.6 IWF server role procedures . 27
6.6.1 Distinction of requests sent to the IWF . 27
6.6.1.1 SIP INVITE request . 27
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3GPP TS 29.379 version 16.1.1 Release 16 4 ETSI TS 129 379 V16.1.1 (2020-11)
6.6.1.2 SIP MESSAGE request . 27
6.6.2 IWF participating role . 28
6.6.2.1 Requests initiated by a participant homed in the IWF . 28
6.6.2.1.1 SDP offer generation . 28
6.6.2.1.1.1 On-demand session . 28
6.6.2.1.2 Sending an INVITE request . 29
6.6.2.1.3 IWF sending a SIP BYE request . 29
6.6.2.1.4 Priority call conditions . 29
6.6.2.1.4.1 General . 29
6.6.2.1.4.2 Determining authorisation for originating a priority group call . 29
6.6.2.1.4.3 Determining authorisation for initiating or cancelling an MCPTT emergency alert . 30
6.6.2.1.4.4 Validate priority request parameters . 30
6.6.2.1.4.5 Retrieving Resource-Priority header field values . 30
6.6.2.1.5 Sending a SIP INVITE request on receipt of SIP 3xx response . 31
6.6.2.2 Requests terminated to the IWF . 32
6.6.2.2.1 SDP offer generation . 32
6.6.2.2.2 SIP BYE request towards the terminating IWF . 32
6.6.2.2.2.1 On-demand. 32
6.6.3 IWF controlling role . 32
6.6.3.1 Requests initiated by the IWF performing the controlling role . 32
6.6.3.1.1 Sending an INVITE request . 32
6.6.3.1.2 Sending a SIP BYE request . 32
6.6.3.1.3 Sending a SIP re-INVITE request for MCPTT emergency group call . 33
6.6.3.1.4 Sending a SIP INVITE request for MCPTT emergency group call . 34
6.6.3.1.5 Sending a SIP UPDATE request for Resource-Priority header field correction. 35
6.6.3.1.6 Generating a SIP re-INVITE request to cancel an in-progress emergency . 36
6.6.3.1.7 Populate mcptt-info and location-info MIME bodies for emergency alert . 36
6.6.3.1.8 Authorisations . 36
6.6.3.1.8.1 Determining authorisation for initiating an MCPTT emergency alert . 36
6.6.3.1.8.2 Determining authorisation for initiating an MCPTT emergency group or private call . 37
6.6.3.1.8.3 Determining authorisation for cancelling an MCPTT emergency alert . 37
6.6.3.1.8.4 Determining authorisation for cancelling an MCPTT emergency group or private call . 37
6.6.3.1.8.5 Determining authorisation for initiating an MCPTT imminent peril call . 38
6.6.3.1.8.6 Determining authorisation for cancelling an MCPTT imminent peril call . 38
6.6.3.1.8.7 Sending a SIP OPTIONS request to authorise an MCPTT user at a non-controlling
MCPTT function of a MCPTT group . 38
6.6.3.1.9 Generating a SIP 403 response for priority call request rejection . 40
6.6.3.1.10 Handling the expiry of timer TNG2 (in-progress emergency group call timer) . 40
6.6.3.1.11 Sending a SIP INFO request in the dialog of a SIP request for a priority call . 41
6.6.3.1.12 Retrieving Resource-Priority header field values . 41
6.6.3.2 Requests terminated by the IWF performing the controlling role . 41
6.6.3.2.1 Receiving a SIP BYE request . 41
6.6.3.3 Handling of the acknowledged call setup timer (TNG1) . 42
6.6.3.4 Generating a SIP NOTIFY request . 44
6.6.3.5 Handling of the group call timer (TNG3) . 45
6.6.3.5.1 General . 45
6.6.3.5.2 Interaction with the in-progress emergency group call timer (TNG2) . 45
6.6.4 IWF non-controlling role . 46
6.6.4.1 Request initiated by the IWF performing the non-controlling role of a group . 46
6.6.4.1.1 SDP offer generation . 46
6.6.4.1.2 Sending an INVITE request towards the MCPTT client . 46
6.6.4.1.3 Sending a SIP INFO request . 47
6.6.4.1.4 Sending an INVITE request towards the controlling MCPTT function . 48
6.6.4.2 Requests terminated by the non-controlling MCPTT function of an MCPTT group . 49
6.6.4.2.1 SDP answer generation . 49
6.6.4.2.2 Sending a SIP response to the SIP INVITE request . 49
6.6.4.2.2.1 Sending a SIP 183 (Session Progress) response. 49
6.6.4.2.2.2 Sending a SIP 200 (OK) response . 49
6.6.4.3 Generating a SIP NOTIFY request . 50
6.6.5 Retrieving and processing a group document . 51
6.6.5.1 General . 51
6.6.5.2 Rules for joining a group session . 51
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3GPP TS 29.379 version 16.1.1 Release 16 5 ETSI TS 129 379 V16.1.1 (2020-11)
6.6.5.3 Determining the group members to invite . 51
6.6.6 Error handling . 51
6.6.6.1 Public service identity does not exist . 51
6.6.7 Session release policy . 51
6.6.7.1 Session release policy for group call . 51
6.6.7.2 Session release policy for private call . 52
6.7 Implicit floor request . 52
6.8 Confidentiality and Integrity Protection . 52
6.8.1 General . 52
6.8.1.1 Applicability and exclusions . 52
6.8.1.2 Performing XML content encryption . 52
6.8.1.3 Performing integrity protection on an XML body . 52
6.8.1.4 Keys used in confidentiality protection procedures . 53
6.8.2 Confidentiality Protection . 53
6.8.2.1 Procedures for sending confidentiality protected content . 53
6.8.2.1.1 IWF performing any role of an MCPTT server . 53
6.8.2.2 IWF copying received XML content. 53
6.8.3 Integrity Protection of XML documents . 54
6.8.3.1 Keys used in integrity protection procedures . 54
6.8.3.2 Integrity protection at the IWF . 54
6.9 Priority sharing . 54
6.10 Private call parameters . 55
6.10.1 Private call parameter check . 55
6.10.2 Private call parameter response values . 55
7 Registration and service authorisation . 55
8 Pre-established session . 55
9 Affiliation . 56
9.1 General . 56
9.2 Procedures . 56
9.2.1 IWF procedures towards the MCPTT system . 56
9.2.1.1 General . 56
9.2.1.2 Procedures towards the MCPTT system of an IWF serving the user homed in the IWF . 57
9.2.1.2.1 General . 57
9.2.1.2.2 Stored information . 57
9.2.1.2.3 Procedure for handling affiliation status change of a user homed in the IWF . 57
9.2.1.2.4 Receiving subscription to affiliation status procedure . 59
9.2.1.2.5 Sending notification of change of affiliation status procedure . 60
9.2.1.2.6 Sending affiliation status change towards MCPTT server owning MCPTT group procedure . 60
9.2.1.2.7 Affiliation status determination from MCPTT server owning MCPTT group procedure. . 62
9.2.1.2.8 Affiliation status determination . 64
9.2.1.2.9 Affiliation status change by implicit affiliation . 65
9.2.1.2.10 Implicit affiliation status change completion . 66
9.2.1.2.11 Implicit affiliation status change cancellation . 67
9.2.1.2.12 Automatic affiliation to configured groups procedure. 67
9.2.1.3 Procedures of MCPTT server owning the MCPTT group . 67
9.2.1.3.1 General . 67
9.2.1.3.2 Stored information . 67
9.2.1.3.3 Receiving group affiliation status change procedure . 67
9.2.1.3.4 Receiving subscription to affiliation status procedure . 69
9.2.1.3.5 Sending notification of change of affiliation status procedure . 70
9.2.1.3.6 Implicit affiliation eligibility check procedure . 70
9.2.1.3.7 Affiliation status change by implicit affiliation procedure . 71
9.2.1.3.8 Affiliation eligibility check procedure . 71
9.2.1.3.9 Receiving subscription to group dynamic data procedure . 72
9.2.1.3.10 Sending notification of change of group dynamic data procedure . 72
10 Call signalling - group call . 73
10.1 Prearranged group call .
...