ETSI TS 122 179 V15.2.0 (2018-07)

LTE; Mission Critical Push to Talk (MCPTT) over LTE; Stage 1 (3GPP TS 22.179 version 15.2.0 Release 15)

RTS/TSGS-0122179vf20

General Information

• Status: Published
• Publication Date: 25-Jul-2018
• Technical Committee: 3GPP SA 1 - Services
• Current Stage: 12 - Completion
• Completion Date: 26-Jul-2018

Standards Content (Sample)

TECHNICAL SPECIFICATION
LTE;
Mission Critical Push to Talk (MCPTT) over LTE;
Stage 1
(3GPP TS 22.179 version 15.2.0 Release 15)

3GPP TS 22.179 version 15.2.0 Release 15 1 ETSI TS 122 179 V15.2.0 (2018-07)

Reference
RTS/TSGS-0122179vf20
Keywords
LTE
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ETSI
3GPP TS 22.179 version 15.2.0 Release 15 2 ETSI TS 122 179 V15.2.0 (2018-07)
Intellectual Property Rights
Essential patents
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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
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ETSI
3GPP TS 22.179 version 15.2.0 Release 15 3 ETSI TS 122 179 V15.2.0 (2018-07)
Contents
Intellectual Property Rights . 2
Foreword . 2
Modal verbs terminology . 2
Foreword . 8
Introduction . 8
1 Scope . 9
2 References . 9
3 Definitions and abbreviations . 10
3.1 Definitions . 10
3.2 Abbreviations . 12
4 Mission Critical Push To Talk overview . 12
4.1 General . 12
4.2 Typical use of the MCPTT Service . 13
4.3 Overview of MCPTT Group affiliation, call and transmission . 13
4.4 General handling of requests . 17
4.5 Overview of MCPTT UE and MCPTT User in the MCPTT Service . 17
4.5.1 MCPTT User association to MCPTT UE in on-network mode . 18
4.5.2 MCPTT User and MCPTT UE relationship . 18
4.5.3 MCPTT Users accessing the service through non-3GPP access interface . 18
4.5.4 Shareable MCPTT UEs and gateway UEs . 18
4.5.5 MCPTT User association to MCPTT UE in off-network mode . 19
4.6 Overview of MCPTT priorities . 19
4.6.1 MCPTT priority model . 19
4.6.2 Generic processing of priority information . 21
4.6.3 Handling of MCPTT priority information for Floor control . 21
4.6.4 Handling of MCPTT priority information for interactions at the transport layer . 21
4.6.5 Handling of MCPTT priority information for interactions with non-3GPP PTT systems . 22
4.6.6 MCPTT priority for Private Call . 22
4.7 Overview of MCPTT identifiers . 22
5 MCPTT Service requirements common for on the network and off the network . 22
5.1 General group call requirements . 22
5.1.1 General aspects . 22
5.1.2 Group/status information . 23
5.1.3 Group configuration . 23
5.1.4 Identification . 23
5.1.5 Membership/affiliation . 23
5.1.6 Group Call administration . 23
5.1.7 Prioritization . 23
5.1.8 Charging requirements for MCPTT . 23
5.2 Broadcast Group . 24
5.2.1 General Broadcast Group Call . 24
5.2.2 Group-Broadcast Group (e.g., announcement group) . 24
5.2.3 User-Broadcast Group (e.g., System Call) . 24
5.3 Late call entry . 24
5.4 Dynamic group management (i.e., dynamic regrouping) . 24
5.5 Receiving from multiple MCPTT calls . 24
5.5.1 Overview . 24
5.5.2 Requirements . 25
5.6 Private Call . 25
5.6.1 Private Call overview. 25
5.6.2 Private Call (with Floor control) general requirements . 25
5.6.3 Private Call (with Floor control) commencement requirements . 26
5.6.4 Private Call (with Floor control) termination . 26
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5.6.5 Private Call (with Floor control) administration . 27
5.7 MCPTT priority requirements . 27
5.7.1 Overview . 27
5.7.2 Call types based on priorities . 28
5.7.2.1 MCPTT Emergency Group Call . 28
5.7.2.1.1 MCPTT Emergency Group Call requirements . 28
5.7.2.1.2 MCPTT Emergency Group Call cancellation requirements . 28
5.7.2.2 Imminent Peril group call . 29
5.7.2.2.1 Imminent Peril group call requirements . 29
5.7.2.2.2 Imminent Peril group call cancellation requirements . 29
5.7.2.3 MCPTT Emergency Private Call (with Floor control) . 29
5.7.2.3.1 MCPTT Emergency Private Call (with Floor control) requirements. 29
5.7.2.3.2 MCPTT Emergency Private Call (with Floor control) cancellation requirements . 29
5.7.2.4 MCPTT Emergency Alert . 30
5.7.2.4.1 MCPTT Emergency Alert requirements . 30
5.7.2.4.2 MCPTT Emergency Alert cancellation requirements. 30
5.8 User ID . 30
5.9 MCPTT UE management . 30
5.10 MCPTT User Profile . 30
5.11 Support for multiple devices . 30
5.12 Location . 30
5.13 Security . 31
5.14 Audio / voice quality . 31
5.15 Interactions between MCPTT Group calls and MCPTT Private Calls (with Floor control) . 32
5.16 Relay requirements . 32
5.17 Gateway requirements . 32
5.18 Control and management by Mission Critical Organizations . 32
5.18.1 Overview . 32
5.18.2 General requirements . 32
5.18.3 Operational visibility for Mission Critical Organizations . 32
5.19 General Administrative – groups and users . 32
6 MCPTT Service requirements specific to on-network use . 33
6.1 General administrative – groups and users . 33
6.2 MCPTT calls . 33
6.2.1 Commencement modes for MCPTT Group calls. 33
6.2.2 Queuing . 34
6.2.3 Floor control . 34
6.2.3.1 General aspects . 34
6.2.3.2 Requesting permission to transmit . 34
6.2.3.3 Override . 35
6.2.3.3.1 General aspects . 35
6.2.3.3.2 Override – one transmitting Participant . 36
6.2.3.3.3 Override – simultaneously Transmitting MCPTT Group Members . 36
6.2.3.4 Terminating permission to transmit . 36
6.2.3.5 Transmit time limit . 36
6.2.3.6 Audio cut-in on designated MCPTT Groups . 36
6.2.3.6.1 Overview . 36
6.2.3.6.2 Requirements . 37
6.2.3.6.3 Requesting permission to transmit . 37
6.2.3.6.4 Terminating permission to transmit . 37
6.2.3.6.5 Transmit time limit . 37
6.2.3.7 MCPTT Groups configured for multi-talker control . 38
6.2.3.7.1 Overview . 38
6.2.3.7.2 General aspects . 38
6.2.3.7.3 Requesting permission to transmit . 38
6.2.3.7.4 Override . 38
6.2.4 Call termination . 39
6.3 General requirements . 39
6.4 General group call . 40
6.4.1 General aspects . 40
6.4.2 Group status/information . 40
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6.4.3 Identification . 40
6.4.4 Membership/affiliation . 40
6.4.5 Membership/affiliation list . 40
6.4.6 Authorized user remotely changes another MCPTT User's affiliated and/or Selected MCPTT
Group(s) . 40
6.4.6.1 Mandatory change . 40
6.4.6.2 Negotiated change . 41
6.4.7 Prioritization . 41
6.4.8 Relay requirements . 41
6.4.9 Administrative . 41
6.5 Broadcast group . 41
6.5.1 General Broadcast Group Call . 41
6.5.2 Group-Broadcast Group (e.g., announcement group) . 41
6.5.3 User-Broadcast Group (e.g., System Call) . 41
6.6 Dynamic group management (i.e., dynamic regrouping) . 42
6.6.1 General dynamic regrouping. 42
6.6.2 Group Regrouping . 42
6.6.2.1 Service description . 42
6.6.2.2 Requirements . 42
6.6.3 Temporary Group-Broadcast Group . 42
6.6.4 User regrouping . 42
6.6.4.1 Service description . 42
6.6.4.2 Requirements . 43
6.7 Private Call . 43
6.7.0 Overview . 43
6.7.1 General requirements . 43
6.7.2 Administrative . 44
6.7.3 Prioritization . 44
6.7.4 Private Call (without Floor control) commencement requirements . 44
6.7.4a Private Call (with Floor control) commencement requirements . 45
6.7.5 Private Call (without Floor control) termination . 45
6.7.6 Call back request requirements . 45
6.8 MCPTT priority requirements . 45
6.8.1 General . 45
6.8.2 3GPP system access controls . 46
6.8.3 3GPP system admission controls . 46
6.8.4 3GPP system scheduling controls . 46
6.8.5 UE access controls . 46
6.8.6 Application layer priorities . 46
6.8.6.1 Overview . 46
6.8.6.2 Requirements . 46
6.8.7 Call types based on priorities . 47
6.8.7.1 MCPTT Emergency Group Call requirements . 47
6.8.7.2 MCPTT Emergency Private Call (with Floor control) requirements . 47
6.8.7.3 Imminent Peril group call requirements . 47
6.8.7.4 MCPTT Emergency Alert . 47
6.8.7.4.1 Requirements . 47
6.8.7.4.2 MCPTT Emergency Alert cancellation requirements. 47
6.9 IDs and aliases . 47
6.10 User Profile management . 48
6.11 Support for multiple devices . 48
6.12 Location . 48
6.13 Security . 48
6.13.1 Overview . 48
6.13.2 Cryptographic protocols . 48
6.13.3 Authentication . 48
6.13.4 Access control . 48
6.13.5 Regulatory issues . 49
6.14 Interactions for MCPTT Group Calls and MCPTT Private Calls. 49
6.15 Audio MCPTT call performance . 49
6.15.1 General overview . 49
6.15.2 General requirements . 49
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6.15.3 MCPTT access time and mouth-to-ear latency . 49
6.15.3.1 General overview . 49
6.15.3.2 Requirements . 50
6.15.4 Late call entry performance . 51
6.15.4.1 General overview . 51
6.15.4.2 Requirements . 52
6.15.5 Audio / voice quality. 52
6.15.6 Radio Resource Efficiency Performance . 52
6.16 Additional services for MCPTT calls . 53
6.16.1 Discreet listening capabilities . 53
6.16.2 Ambient listening . 53
6.16.2.1 Overview of ambient listening . 53
6.16.2.2 Ambient listening requirements . 53
6.16.2.2.1 General Ambient Listening requirements . 53
6.16.2.2.2 Remotely initiated Ambient Listening requirements . 53
6.16.2.2.3 Locally initiated Ambient Listening requirements . 53
6.16.3 Remotely initiated MCPTT call . 53
6.16.3.1 Overview . 53
6.16.3.2 Requirements . 54
6.16.4 Recording and audit requirements . 54
6.17 Interaction with telephony services . 54
6.18 Interworking . 54
6.18.1 Non-3GPP access . 54
6.18.2 Interworking between MCPTT systems . 54
6.18.3 Interworking with non-3GPP PTT systems . 55
6.18.3.1 Overview . 55
6.18.3.2 Project 25 . 55
6.18.3.3 TETRA . 56
6.18.3.4 Legacy land mobile radio . 57
6.19 MCPTT coverage extension using ProSe UE-to-Network Relays . 57
7 MCPTT Service requirements specific to off-network use . 58
7.1 Off-network Push To Talk overview . 58
7.2 General off-network MCPTT requirements . 59
7.3 Floor control . 59
7.3.1 General aspects . 59
7.3.2 Requesting permission to transmit . 60
7.3.3 Override . 60
7.3.4 Terminating permission to transmit . 60
7.3.5 Transmit time limit . 61
7.4 Call Termination . 61
7.5 Broadcast Group . 61
7.6 Dynamic group management (i.e., dynamic regrouping) . 61
7.7 MCPTT priority requirements . 61
7.8 Call types based on priorities . 61
7.8.1 MCPTT Emergency Group Call requirements . 61
7.8.2 MCPTT Emergency Group Call cancellation requirements . 62
7.8.3 Imminent Peril Call . 62
7.8.3.1 Imminent Peril group call requirements . 62
7.8.3.2 Imminent Peril group call cancellation requirements . 62
7.9 Location . 62
7.10 Security . 62
7.11 Audio MCPTT Call performance . 62
7.11.1 MCPTT Access time and Mouth-to-ear latency . 62
7.11.1.1 General overview . 62
7.11.1.2 Requirements . 63
7.11.2 Late call entry performance . 63
7.11.2.1 General overview . 63
7.11.2.2 Requirements . 63
7.11.3 Audio / Voice quality . 63
7.12 Off-network MCPTT operations . 63
7.13 Off-network UE functionality . 63
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7.14 Switching to off-network MCPTT . 64
7.15 Off-network recording and audit requirements . 64
7.16 Off-network UE-to-UE Relay . 64
7.16.1 Private Calls . 64
7.16.2 Group Calls . 64
Annex A (informative): Variables . 65
Annex A1 (Informative): MCPTT Requirements for MCCoRe . 66
Annex B (informative): Bibliography . 80
Annex C (informative): MCPTT scalability guide . 81
Annex D (informative): Change history . 82
History . 85

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3GPP TS 22.179 version 15.2.0 Release 15 8 ETSI TS 122 179 V15.2.0 (2018-07)
Foreword
rd
This Technical Specification has been produced by the 3 Generation Partnership Project (3GPP).
The contents of the present document are subject to continuing work within the TSG and may change following formal
TSG approval. Should the TSG modify the contents of the present document, it will be re-released by the TSG with an
identifying change of release date and an increase in version number as follows:
Version x.y.z
where:
x the first digit:
1 presented to TSG for information;
2 presented to TSG for approval;
3 or greater indicates TSG approved document under change control.
y the second digit is incremented for all changes of substance, i.e. technical enhancements, corrections,
updates, etc.
z the third digit is incremented when editorial only changes have been incorporated in the document.
Introduction
The present document covers requirements for Mission Critical Push To Talk (MCPTT) service (represented by the
term, MCPTT Service). The MCPTT Service can be used for public safety applications and also for general commercial
applications (e.g., utility companies and railways). The specifications contained within the present document can also
form the basis for a non-mission critical Push To Talk service (called a PTT service).
Note that further development of mission critical services beyond MCPTT (such as Mission Critical Video and Mission
Critical Data) created an opportunity to re-use base functionality documented in the Stage 1 requirements for MCPTT.
For example, the ability to communicate mission critical information to groups of users is a common need regardless of
service type. Wherever originating MCPTT requirements were found to be in common with other mission critical
services, those requirements were moved to a new Technical Specification (3GPP TS 22.280). Each requirement that
was moved has been voided in this version of 3GPP TS 22.179, and an informative annex has been created at the end of
this specification documenting the location of the originating 3GPP TS 22.179 requirement in 3GPP TS 22.280.
ETSI
3GPP TS 22.179 version 15.2.0 Release 15 9 ETSI TS 122 179 V15.2.0 (2018-07)
1 Scope
The present document provides the service requirements for operation of the MCPTT Service. MCPTT makes use of
capabilities included in Group Communications System Enablers and Proximity Services, with additional requirements
specific to the MCPTT Service. The MCPTT Service can be used for public safety applications and also for general
commercial applications (e.g., utility companies and railways). The requirements in this specification do not apply to
GSM or UMTS.
2 References
The following documents contain provisions which, through reference in this text, constitute provisions of the present
document.
- References are either specific (identified by date of publication, edition number, version number, etc.) or
non-specific.
- For a specific reference, subsequent revisions do not apply.
- For a non-spec
...