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TECHNICAL SPECIFICATION
Universal Mobile Telecommunications System (UMTS);
LTE;
Digital cellular telecommunications system (Phase 2+) (GSM);
3G security;
Lawful interception architecture and functions
(3GPP TS 33.107 version 15.4.0 Release 15)
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3GPP TS 33.107 version 15.4.0 Release 15 1 ETSI TS 133 107 V15.4.0 (2019-04)
Reference
RTS/TSGS-0333107vf40
Keywords
GSM,LTE,SECURITY,UMTS
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3GPP TS 33.107 version 15.4.0 Release 15 2 ETSI TS 133 107 V15.4.0 (2019-04)
Intellectual Property Rights
Essential patents
IPRs essential or potentially essential to normative deliverables may have been declared to ETSI. The information
pertaining to these essential IPRs, if any, is publicly available for ETSI members and non-members, and can be found
in ETSI SR 000 314: "Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to ETSI in
respect of ETSI standards", which is available from the ETSI Secretariat. Latest updates are available on the ETSI Web
server (https://ipr.etsi.org/).
Pursuant to the ETSI IPR Policy, no investigation, including IPR searches, has been carried out by ETSI. No guarantee
can be given as to the existence of other IPRs not referenced in ETSI SR 000 314 (or the updates on the ETSI Web
server) which are, or may be, or may become, essential to the present document.
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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.
The cross reference between GSM, UMTS, 3GPP and ETSI identities can be found under
.
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
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3GPP TS 33.107 version 15.4.0 Release 15 3 ETSI TS 133 107 V15.4.0 (2019-04)
Contents
Intellectual Property Rights . 2
Foreword . 2
Modal verbs terminology . 2
Foreword . 16
Introduction . 16
1 Scope . 17
2 References . 17
3 Definitions, symbols and abbreviations. . 20
3.1 Definitions . 20
3.2 Abbreviations . 21
4 Functional architecture . 23
5 Activation, deactivation and interrogation . 31
5.0 General . 31
5.1 Activation . 32
5.1.0 General . 32
5.1.1 X1_1-interface . 33
5.1.2 X1_2-interface (IRI) . 34
5.1.3 X1_3-interface (CC) . 35
5.2 Deactivation . 36
5.2.0 General . 36
5.2.1 X1_1-interface . 36
5.2.2 X1_2-interface (IRI) . 36
5.2.3 X1_3-interface (CC) . 37
5.3 Interrogation . 37
5.3.0 General . 37
5.3.1 Interrogation of the 3G ICEs. 37
5.3.2 Interrogation of Delivery Functions . 38
5A X Interfaces . 38
5A.1 General . 38
5A.2 X1 . 39
5A.2.1 General . 39
5A.2.2 X1 Detail . 39
5A.3 X2 . 39
5A.3.1 General . 39
5A.4 X3 . 39
5A.4.1 General . 39
6 Invocation of Lawful Interception (LI) for Circuit Switched (CS) services . 40
6.0 General . 40
6.1 Provision of Intercept CC - Circuit Switched . 41
6.2 Provision of CC - Short Message Service . 42
6.3 Provision of Intercept Related Information . 43
6.3.0 General . 43
6.3.1 X2-interface . 43
6.3.2 Structure of the events . 43
6.3.3 Call Related events . 46
6.3.3.1 Call establishment . 46
6.3.3.2 Answer . 46
6.3.3.3 Supplementary Services . 47
6.3.3.4 Handover . 47
6.3.3.5 Release . 47
6.3.4 Non Call Related events . 48
6.3.4.1 SMS. 48
ETSI
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3GPP TS 33.107 version 15.4.0 Release 15 4 ETSI TS 133 107 V15.4.0 (2019-04)
6.3.4.2 Location update . 48
6.3.4.3 Subscriber Controlled Input (SCI) . 48
6.3.5 HLR Related events . 48
6.3.5.1 Serving system . 48
6.3.5.2 HLR subscriber record change . 49
6.3.5.3 Cancel location . 49
6.3.5.4 Register location . 49
6.4 Intercept cases for circuit switched supplementary services . 51
6.4.1 Interception of Multiparty call . 51
6.4.2 Interception for Call Forwarding / Call Deflection / ECT . 51
7 Invocation of Lawful Interception for GSN Packet Data services . 52
7.0 General . 52
7.1 Provision of Intercept Product - Short Message Service . 53
7.2 Provision of Intercepted Content of Communications - Packet data GSN services . 54
7.2.0 General . 54
7.2.1 X3-interface . 54
7.3 Provision of Intercept Related Information . 55
7.3.0 General . 55
7.3.1 X2-interface . 55
7.3.2 Structure of the events . 56
7.4 Packet Data related events . 60
7.4.1 Mobile Station Attach . 60
7.4.2 Mobile Station Detach . 61
7.4.3 Packet Data PDP context activation . 61
7.4.4 Start of interception with PDP context active . 62
7.4.5 Packet Data PDP context deactivation . 62
7.4.6 RA update . 63
7.4.7 SMS . 63
7.4.8 Packet Data PDP context modification . 64
7.4.9 Serving System . 64
7.4.10 Start of interception with mobile station attached. 64
7.4.11 Packet Data Header Information . 64
7.4.11.0 Introduction . 64
7.4.11.1 Packet Data Header Report . 65
7.4.11.2 Packet Data Summary Report . 65
7.4.12 HLR subscriber record change. 66
7.4.13 Cancel location . 67
7.4.14 Register location . 67
7.4.15 Location information request . 67
7.4.16 Void . 67
7.5 Void . 67
7.6 Interception of the Multimedia Messaging Service (MMS) . 67
7A Invocation of Lawful Interception for Packet Data Multi-media Service . 68
7A.1 Provision of content of communications . 68
7A.1.A Decryption for IMS Media Plane Security . 68
7A.2 Provision of IRI . 68
7A.2.1 Provision of IRI with SIP messaging . 68
7A.2.2 Provision of IRI with XCAP messages . 69
7A.2.3 Provision of IRI with Diameter or MAP messages related to HSS. 69
7A.2.3.0 General . 69
7A.2.3.1 Serving system . 70
7A.2.3.2 Subscriber record change . 71
7A.2.3.3 Registration Termination . 72
7A.2.4 Provision of IRI for WebRTC. 73
7A.3 Multi-media events . 73
7A.3.0 General . 73
7A.3.1 Mid IMS Session Interception . 75
7A.3.1.0 General . 75
7A.3.1.1 SDES Media Security . 76
7A.4 Multi-media Call State Control Service Scenarios . 76
ETSI
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3GPP TS 33.107 version 15.4.0 Release 15 5 ETSI TS 133 107 V15.4.0 (2019-04)
7A.5 Push to talk over Cellular (PoC) . 76
7A.6 SMS over IMS . 76
7A.7 LI for KMS based IMS Media Security . 76
7A.7.1 LI Architecture and functions . 76
7A.7.2 Signalling over the Xk interfaces and LI events . 77
7A.7.3 Cooperating KMSs . 78
7A.7.4 Security . 78
7A.7.5 Start of interception for an already established IMS media secured session . 78
7A.8 IMS IMEI Interception . 79
7A.9 Void . 79
8 Security. 80
8.0 General . 80
8.1 Administration security . 80
8.2 IRI security . 80
8.2.1 Normal operation . 80
8.2.2 Communication failure . 80
8.3 CC security . 81
8.4 Security aspects of Lawful Interception (LI) billing . 81
8.5 Other security issues . 81
8.5.1 Log files . 81
8.5.2 Data consistency . 81
9 Invocation of Lawful Interception (LI) for 3GPP WLAN interworking services . 81
9.0 General . 81
9.1 Provision of Intercept Product - Short Message Service . 82
9.2 Provision of Intercepted Content of Communications - 3GPP WLAN Interworking services . 82
9.2.0 General . 82
9.2.1 X3-interface . 83
9.3 Provision of Intercept Related Information . 83
9.3.0 General . 83
9.3.1 X2-interface . 84
9.3.2 3GPP WLAN Interworking LI Events and Event Information . 84
9.4 Structure of I-WLAN Events. 91
9.4.1 I-WLAN Access Initiation . 91
9.4.2 WLAN Access Termination . 92
9.4.3 I-WLAN Tunnel Establishment . 92
9.4.4 I-WLAN Tunnel Disconnect. 93
9.4.5 Start of Intercept with I-WLAN Communication Active. 94
9.4.6 Packet Data Header Information . 95
9.4.6.0 Introduction . 95
9.4.6.1 Packet Data Header Report . 95
9.4.6.2 Packet Data Summary Report . 96
10 Interception of Multimedia Broadcast/MultiCast Service (MBMS) . 98
10.0 General .
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