ETSI TS 124 282 V14.12.0 (2026-02)

LTE; Mission Critical Data (MCData) signalling control; Protocol specification (3GPP TS 24.282 version 14.12.0 Release 14)

RTS/TSGC-0124282vec0

General Information

• Status: Not Published
• Technical Committee: 3GPP CT 1 - MM/CC/SM [lu] (formely CN1)
• Current Stage: 12 - Citation in the OJ (auto-insert)
• Completion Date: 10-Feb-2026

Standards Content (Sample)

TECHNICAL SPECIFICATION
LTE;
Mission Critical Data (MCData) signalling control;
Protocol specification
(3GPP TS 24.282 version 14.12.0 Release 14)

3GPP TS 24.282 version 14.12.0 Release 14 1 ETSI TS 124 282 V14.12.0 (2026-02)

Reference
RTS/TSGC-0124282vec0
Keywords
LTE
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ETSI
3GPP TS 24.282 version 14.12.0 Release 14 2 ETSI TS 124 282 V14.12.0 (2026-02)
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3GPP TS 24.282 version 14.12.0 Release 14 3 ETSI TS 124 282 V14.12.0 (2026-02)
Contents
Intellectual Property Rights . 2
Legal Notice . 2
Modal verbs terminology . 2
Foreword . 11
1 Scope . 12
2 References . 12
3 Definitions, symbols and abbreviations . 14
3.1 Definitions . 14
3.2 Abbreviations . 14
4 General . 14
4.1 MCData overview . 14
4.2 Identity, URI and address assignments . 15
4.2.1 Public Service identi ties . 15
4.2.2 MCData session identity . 15
4.2.3 MCData client ID . 16
4.3 Pre-established sessions . 16
4.4 Emergency Alerts . 16
4.5 MCData Protocol . 16
4.6 Protection of sensitive XML application data . 16
4.7 Protection of TLV signalling and media content . 19
4.8 MCData client ID . 19
4.9 Warning Header Field . 20
4.9.1 General . 20
4.9.2 Warning texts . 20
5 Functional entities . 23
5.1 Introduction . 23
5.2 MCData client . 23
5.3 MCData server . 24
6 Common procedures. 25
6.1 Introduction . 25
6.2 MCData client procedures . 25
6.2.1 Distinction of requests at the MCData client . 25
6.2.1.1 SIP MESSAGE request . 25
6.2.2 MCData conversation items . 26
6.2.2.1 Generating an SDS Message . 26
6.2.2.2 Generating an FD Message for FD using HTTP . 27
6.2.2.3 Generating an FD Message for FD using media plane . 28
6.2.3 Disposition Notifications . 29
6.2.3.1 Generating an SDS Notification . 29
6.2.3.2 Generating an FD Notification . 29
6.2.4 Sending SIP requests and receiving SIP responses . 30
6.2.4.1 Generating a SIP MESSAGE request towards the originating participating MCData function . 30
6.3 MCData server procedures . 30
6.3.1 Distinction of requests at the MCData server . 30
6.3.1.1 SIP MESSAGE request . 30
6.3.1.2 SIP INVITE request . 32
6.3.2 Sending SIP requests and receiving SIP responses . 33
6.3.2.1 Generating a SIP MESSAGE request towards the terminating MCData client . 33
6.3.3 Retrieving a group document . 33
6.3.4 Determining targeted group members for MCData communications . 34
6.3.5 Affiliation check . 34
6.4 Handling of MIME bodies in a SIP message. 34
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6.5 Confidentiality and Integrity Protection of sensitive XML content . 35
6.5.1 General . 35
6.5.1.1 Applicability and exclusions . 35
6.5.1.2 Performing XML content encryption . 35
6.5.1.3 Performing integrity protection on an XML body . 35
6.5.1.4 Verifying integrity of an XML body and decrypting XML elements . 35
6.5.2 Confidentiality Protection . 36
6.5.2.1 General . 36
6.5.2.2 Keys used in confidentiality protection procedures . 36
6.5.2.3 Procedures for sending confidentiality protected content . 36
6.5.2.3.1 MCData client . 36
6.5.2.3.2 MCData server. 36
6.5.2.3.3 Content Encryption in XML elements . 37
6.5.2.3.4 Attribute URI Encryption . 37
6.5.2.4 Procedures for receiving confidentiality protected content . 37
6.5.2.4.1 Determination of confidentiality protected content . 37
6.5.2.4.2 Decrypting confidentiality protected content in XML elements . 38
6.5.2.4.3 Decrypting confidentiality protected URIs in XML attributes . 38
6.5.2.5 MCData server copying received XML content . 38
6.5.3 Integrity Protection of XML documents . 39
6.5.3.1 General . 39
6.5.3.2 Keys used in integrity protection procedures . 40
6.5.3.3 Sending integrity protected content . 41
6.5.3.3.1 MCData client . 41
6.5.3.3.2 MCData server. 41
6.5.3.3.3 Integrity protection procedure . 41
6.5.3.4 Receiving integrity protected content. 42
6.5.3.4.1 Determination of integrity protected content . 42
6.5.3.4.2 Verification of integrity protected content. 42
6.6 Confidentiality and Integrity Protection of TLV messages . 42
6.6.1 General . 42
6.6.2 Derivation of master keys for media and media control . 43
6.6.3 Protection of MCData Data signalling and MCData Data messages . 43
6.6.3.1 General . 43
6.6.3.2 The MCData client . 44
6.6.3.3 The participating MCData function . 44
6.6.3.4 The controlling MCData function . 44
7 Registration and service authorisation . 44
7.1 General . 44
7.2 MCData client procedures . 45
7.2.1 SIP REGISTER request for service authorisation . 45
7.2.1AA SIP REGISTER request without service authorisation . 46
7.2.1A Common SIP PUBLISH procedure . 46
7.2.2 SIP PUBLISH request for service authorisation and MCData service settings . 47
7.2.3 Sending SIP PUBLISH for MCData service settings only . 48
7.2.4 Determination of MCData service settings . 48
7.3 MCData server procedures . 49
7.3.1 General . 49
7.3.1A Confidentiality and Integrity Protection . 49
7.3.2 SIP REGISTER request for service authorisation . 51
7.3.3 SIP PUBLISH request for service authorisation and service settings . 52
7.3.4 Receiving SIP PUBLISH request for MCData service settings only . 53
7.3.5 Receiving SIP PUBLISH request with "Expires=0" . 53
7.3.6 Subscription to and notification of MCData service settings . 54
7.3.6.1 Receiving subscription to MCData service settings . 54
7.3.6.2 Sending notification of change of MCData service settings . 54
8 Affiliation . 55
8.1 General . 55
8.2 MCData client procedures . 55
8.2.1 General . 55
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8.2.2 Affiliation status change procedure . 55
8.2.3 Affiliation status determination procedure . 56
8.2.4 Procedure for sending affiliation status change request in negotiated mode to target MCData user . 57
8.2.5 Procedure for receiving affiliation status change request in negotiated mode from authorized
MCData user . 58
8.3 MCData server procedures . 58
8.3.1 General . 58
8.3.2 Procedures of MCData server serving the MCData user . 58
8.3.2.1 General . 58
8.3.2.2 Stored information . 59
8.3.2.3 Receiving affiliation status change from MCData client procedure . 59
8.3.2.4 Receiving subscription to affiliation status procedure . 62
8.3.2.5 Sending notification of change of affiliation status procedure . 63
8.3.2.6 Sending affiliation status change towards MCData server owning MCData group procedure . 64
8.3.2.7 Affiliation status determination from MCData server owning MCData group procedure . 65
8.3.2.8 Procedure for authorizing affiliation status change request in negotiated mode sent to served
MCData user . 67
8.3.2.9 Forwarding affiliation status change towards another MCData user procedure . 68
8.3.2.10 Forwarding subscription to affiliation status towards another MCData user procedure . 69
8.3.2.11 Affiliation status determination . 69
8.3.2.12 Affiliation status change by implicit affiliation. 70
8.3.2.13 Implicit affiliation status change completion . 71
8.3.2.14 Implicit affiliation status change cancellation . 71
8.3.2.15 Implicit affiliation to configured groups procedure . 72
8.3.3 Procedures of MCData server owning the MCData group . 73
8.3.3.1 General . 73
8.3.3.2 Stored information . 74
8.3.3.3 Receiving group affiliation status change procedure . 74
8.3.3.4 Receiving subscription to affiliation status procedure . 75
8.3.3.5 Sending notification of change of affiliation status procedure . 76
8.3.3.6 Implicit affiliation eligibilty check procedure . 77
8.3.3.7 Affiliation status change by implicit affiliation procedure . 77
8.4 Coding . 78
8.4.1 Extension of application/pidf+xml MIME type . 78
8.4.1.1 Introduction . 78
8.4.1.2 Syntax . 78
8.4.2 Extension of application/simple-filter+xml MIME type . 80
8.4.2.1 Introduction . 80
8.4.2.2 Syntax . 80
9 Short Data Service (SDS) . 81
9.1 General . 81
9.2 On-network SDS . 81
9.2.1 General . 81
9.2.1.1 Sending an SDS message . 81
9.2.1.2 Handling of received SDS messages with or without disposition requests . 82
9.2.1.3 Handling of disposition requests . 83
9.2.2 Standalone SDS using signalling control plane . 83
9.2.2.1 General . 83
9.2.2.2 MCData client procedures . 84
9.2.2.2.1 MCData client originating procedures . 84
9.2.2.2.2 MCData client terminating procedures . 85
9.2.2.3 Participating MCData function procedures . 85
9.2.2.3.1 Originating participating MCData function procedures . 85
9.2.2.3.2 Terminating participating MCData function procedures . 87
9.2.2.4 Controlling MCData function procedures . 87
9.2.2.4.1 Originating controlling MCData function procedures . 87
9.2.2.4.2 Terminating controlling MCData function procedures . 88
9.2.3 Standalone SDS using media plane . 90
9.2.3.1 General . 90
9.2.3.2 MCData client procedures . 90
9.2.3.2.1 SDP offer generation . 90
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9.2.3.2.2 SDP answer generation . 91
9.2.3.2.3 MCData client originating procedures . 91
9.2.3.2.4 MCData client terminating procedures . 93
9.2.3.3 Participating MCData function procedures . 94
9.2.3.3.1 SDP offer generation . 94
9.2.3.3.2 SDP answer generation . 95
9.2.3.3.3 Originating participating MCData function procedures . 95
9.2.3.3.4 Terminating participating MCData function procedures . 97
9.2.3.4 Controlling MCData function procedures . 98
9.2.3.4.1 SDP offer generation . 98
9.2.3.4.2 SDP answer generation . 99
9.2.3.4.3 Originating controlling MCData function procedures . 99
9.2.3.4.4 Terminating controlling MCData function procedures . 100
9.2.4 SDS session . 102
9.2.4.1 General . 102
9.2.4.2 MCData client procedures . 102
9.2.4.2.1 SDP offer generation . 102
9.2.4.2.2 SDP answer generation . 103
9.2.4.2.3 MCData client originating procedures . 103
9.2.4.2.4 MCData client terminating procedures . 105
9.2.4.3 Participating MCData function procedures . 106
9.2.4.3.1 SDP offer generation . 106
9.2.4.3.2 SDP answer generation . 106
9.2.4.3.3 Originating participating MCData function procedures . 107
9.2.4.3.4 Terminating participating MCData function procedures . 108
9.2.4.4 Controlling MCData function procedures . 110
9.2.4.4.1 SDP offer generation . 110
9.2.4.4.2 SDP answer generation . 110
9.2.4.4.3 Originating controlling MCData function procedures . 111
9.2.4.4.4 Terminating controlling MCData function procedures . 112
9.3 Off-network SDS . 114
9.3.1 General . 114
9.3.1.1 Message transport to a MCData Client . 114
9.3.1.2 Message transport to a MCData Group . 114
9.3.2 Standalone SDS using signalling control plane . 114
9.3.2.1 General . 114
9.3.2.2 Sending SDS message . 114
9.3.2.3 Retransmitting SDS message . 116
9.3.2.4 Receiving SDS message . 117
9.3.2.5 SDS Read while TFS3 (delivery and read) is running . 117
9.3.2.6 Timer TFS3 (delivery and read) expires . 117
10 File Distribution (FD) . 117
10.1 General . 117
10.2 On-network FD . 118
10.2.1 General . 118
10.2.1.1 Sending an FD message . 118
10.2.1.2 Handling of received FD messages . 118
10.2.1.2.1 Initial processing of the received FD message . 118
10.2.1.2.2 Mandatory Download . 118
10.2.1.2.3 Non-Mandatory download . 119
10.2.1.3 Discovery of the Absolute URI of the media storage function . 120
10.2.1.3.1 General . 120
10.2.1.3.2 MCData client procedures . 121
10.2.1.3.3 Participating MCData function procedures . 121
10.2.1.3.4 Controlling MCData function procedures . 122
10.2.2 File upload using HTTP . 124
10.2.2.1 Media storage client procedures . 124
10.2.2.2 Media storage function procedures . 125
10.2.3 File download using HTTP . 126
10.2.3.1 Media storage client procedures . 126
10.2.3.2 Media storage function procedures . 126
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10.2.4 FD using HTTP . 126
10.2.4.1 General . 126
10.2.4.2 MCData client procedures . 127
10.2.4.2.1 MCData client originating procedures . 127
10.2.4.2.2 MCData client terminating procedures . 127
10.2.4.3 Participating MCData function procedures . 128
10.2.4.3.1 Originating participating MCData function procedures . 128
10.2.4.3.2 Terminating participating MCData function procedures . 129
10.2.4.4 Controlling MCData function procedures . 130
10.2.4.4.1 Originating controlling MCData function procedures . 130
10.2.4.4.2 Terminating controlling MCData function procedures . 130
10.2.5 FD using media plane . 133
10.2.5.1 General . 133
10.2.5.2 MCData client procedures . 133
10.2.5.2.1 SDP offer generation . 133
10.2.5.2.2 SDP answer generation . 134
10.2.5.2.3 MCData client originating procedures . 134
10.2.5.2.4 MCData client terminating procedures . 136
10.2.5.3 Participating MCData function procedures .
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