ETSI TS 133 107 V15.6.0 (2019-07)

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 15.6.0 Release 15)

3GPP TS 33.107 version 15.6.0 Release 15 1 ETSI TS 133 107 V15.6.0 (2019-07)

Reference
RTS/TSGS-0333107vf60
Keywords
GSM,LTE,SECURITY,UMTS
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ETSI
3GPP TS 33.107 version 15.6.0 Release 15 2 ETSI TS 133 107 V15.6.0 (2019-07)
Intellectual Property Rights
Essential patents
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Legal Notice
This Technical Specification (TS) has been produced by ETSI 3rd Generation Partnership Project (3GPP).
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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 33.107 version 15.6.0 Release 15 3 ETSI TS 133 107 V15.6.0 (2019-07)
Contents
Intellectual Property Rights . 2
Legal Notice . 2
Modal verbs terminology . 2
Foreword . 17
Introduction . 17
1 Scope . 18
2 References . 18
3 Definitions, symbols and abbreviations. . 21
3.1 Definitions . 21
3.2 Abbreviations . 22
4 Functional architecture . 24
5 Activation, deactivation and interrogation . 32
5.0 General . 32
5.1 Activation . 34
5.1.0 General . 34
5.1.1 X1_1-interface . 34
5.1.2 X1_2-interface (IRI) . 35
5.1.3 X1_3-interface (CC) . 36
5.2 Deactivation . 37
5.2.0 General . 37
5.2.1 X1_1-interface . 37
5.2.2 X1_2-interface (IRI) . 38
5.2.3 X1_3-interface (CC) . 38
5.3 Interrogation . 39
5.3.0 General . 39
5.3.1 Interrogation of the 3G ICEs. 39
5.3.2 Interrogation of Delivery Functions . 39
5A X Interfaces . 40
5A.1 General . 40
5A.2 X1 . 40
5A.2.1 General . 40
5A.2.2 X1 Detail . 40
5A.3 X2 . 41
5A.3.1 General . 41
5A.4 X3 . 41
5A.4.1 General . 41
6 Invocation of Lawful Interception (LI) for Circuit Switched (CS) services . 41
6.0 General . 41
6.1 Provision of Intercept CC - Circuit Switched . 43
6.2 Provision of CC - Short Message Service . 44
6.3 Provision of Intercept Related Information . 44
6.3.0 General . 44
6.3.1 X2-interface . 45
6.3.2 Structure of the events . 45
6.3.3 Call Related events . 48
6.3.3.1 Call establishment . 48
6.3.3.2 Answer . 48
6.3.3.3 Supplementary Services . 49
6.3.3.4 Handover . 49
6.3.3.5 Release . 49
6.3.4 Non Call Related events . 50
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6.3.4.1 SMS. 50
6.3.4.2 Location update . 50
6.3.4.3 Subscriber Controlled Input (SCI) . 50
6.3.5 HLR Related events . 51
6.3.5.1 Serving system . 51
6.3.5.2 HLR subscriber record change . 51
6.3.5.3 Cancel location . 51
6.3.5.4 Register location . 52
6.4 Intercept cases for circuit switched supplementary services . 53
6.4.1 Interception of Multiparty call . 53
6.4.2 Interception for Call Forwarding / Call Deflection / ECT . 53
7 Invocation of Lawful Interception for GSN Packet Data services . 54
7.0 General . 54
7.1 Provision of Intercept Product - Short Message Service . 55
7.2 Provision of Intercepted Content of Communications - Packet data GSN services . 56
7.2.0 General . 56
7.2.1 X3-interface . 56
7.3 Provision of Intercept Related Information . 57
7.3.0 General . 57
7.3.1 X2-interface . 58
7.3.2 Structure of the events . 58
7.4 Packet Data related events . 62
7.4.1 Mobile Station Attach . 62
7.4.2 Mobile Station Detach . 63
7.4.3 Packet Data PDP context activation . 63
7.4.4 Start of interception with PDP context active . 64
7.4.5 Packet Data PDP context deactivation . 64
7.4.6 RA update . 65
7.4.7 SMS . 65
7.4.8 Packet Data PDP context modification . 66
7.4.9 Serving System . 66
7.4.10 Start of interception with mobile station attached. 66
7.4.11 Packet Data Header Information . 66
7.4.11.0 Introduction . 66
7.4.11.1 Packet Data Header Report . 67
7.4.11.2 Packet Data Summary Report . 67
7.4.12 HLR subscriber record change. 68
7.4.13 Cancel location . 69
7.4.14 Register location . 69
7.4.15 Location information request . 69
7.4.16 Void . 69
7.5 Void . 69
7.6 Interception of the Multimedia Messaging Service (MMS) . 70
7A Invocation of Lawful Interception for Packet Data Multi-media Service . 70
7A.1 Provision of content of communications . 70
7A.1.A Decryption for IMS Media Plane Security . 70
7A.2 Provision of IRI . 71
7A.2.1 Provision of IRI with SIP messaging . 71
7A.2.2 Provision of IRI with XCAP messages . 71
7A.2.3 Provision of IRI with Diameter or MAP messages related to HSS. 72
7A.2.3.0 General . 72
7A.2.3.1 Serving system . 73
7A.2.3.2 Subscriber record change . 74
7A.2.3.3 Registration Termination . 75
7A.2.4 Provision of IRI for WebRTC. 76
7A.3 Multi-media events . 76
7A.3.0 General . 76
7A.3.1 Mid IMS Session Interception . 78
7A.3.1.0 General . 78
7A.3.1.1 SDES Media Security . 79
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7A.4 Multi-media Call State Control Service Scenarios . 79
7A.5 Push to talk over Cellular (PoC) . 79
7A.6 SMS over IMS . 79
7A.7 LI for KMS based IMS Media Security . 79
7A.7.1 LI Architecture and functions . 79
7A.7.2 Signalling over the Xk interfaces and LI events . 80
7A.7.3 Cooperating KMSs . 81
7A.7.4 Security . 81
7A.7.5 Start of interception for an already established IMS media secured session . 82
7A.8 IMS IMEI Interception . 82
7A.9 Void . 82
8 Security. 83
8.0 General . 83
8.1 Administration security . 83
8.2 IRI security . 83
8.2.1 Normal operation . 83
8.2.2 Communication failure . 84
8.3 CC security . 84
8.4 Security aspects of Lawful Interception (LI) billing . 84
8.5 Other security issues . 84
8.5.1 Log files . 84
8.5.2 Data consistency . 84
9 Invocation of Lawful Interception (LI) for 3GPP WLAN interworking services . 85
9.0 General . 85
9.1 Provision of Intercept Product - Short Message Service . 85
9.2 Provision of Intercepted Content of Communications - 3GPP WLAN Interworking services . 85
9.2.0 General . 85
9.2.1 X3-interface . 86
9.3 Provision of Intercept Related Information . 86
9.3.0 General . 86
9.3.1 X2-interface . 87
9.3.2 3GPP WLAN Interworking LI Events and Event Information . 87
9.4 Structure of I-WLAN Events. 94
9.4.1 I-WLAN Access Initiation . 94
9.4.2 WLAN Access Termination . 95
9.4.3 I-WLAN Tunnel Establishment . 95
9.4.4 I-WLAN Tunnel Disconnect. 96
9.4.5 Start of Intercept with I-WLAN Communication Active. 97
9.4.6 Packet Data Header Information . 98
9.4.6.0 Introduction . 98
9.4.6.1 Packet Data Header Report . 98
9.4.6.2 Packet Data Summary Report . 99
10 Interception of Multimedia Broadcast/MultiCast Service (MBMS) . 101
10.0 General . 101
10.1 Provision of Content of Communications . 101
10.2 Provision of Intercept Related Information . 101
10.2.0 General . 101
10.2.1 X2-interface . 102
10.2.2 MBMS LI Events and Event Information . 102
10.3 Structure of MBMS Events . 104
10.3.1 Service Joining . 104
10.3.2 Service Leaving . 104
10.3.3 Start of Interception with Service Active . 104
10.3.4 Subscription Activation . 105
10.3.5 Subscription Modification . 105
10.3.6 Subscription Termination . 106
11 IMS Conference Services . 106
11.1 Background for IMS Conference Services . 106
11.1A Start of Interception for IMS Conference Services . 107
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11.2 Provision of Intercepted Content of Communication - IMS Conference Services . 107
11.2.0 General . 107
11.2.1 X3-interface . 108
11.3 Provision of Intercept Related Information for IMS Conference Service . 108
11.3.0 General . 108
11.3.1 X2-interface . 109
11.3.2 IMS Conference Events and Event Information . 109
11.3.3 Structure of Conference Events . 113
11.3.3.1 Start of Conference . 113
11.3.3.2 Party Join . 113
11.3.3.3 Party Leave . 114
11.3.3.3A Conference Bearer Modification . 114
11.3.3.4 Start of Intercept on an Active Conference . 115
11.3.3.5 Conference End . 115
11.3.3.6 Creation of Conference . 116
11.3.3.7 Update of Conference . 116
12 Lawful Interception for Evolved Packet System . 117
12.1 LI functional architecture for EPS . 117
12.2 Functional requirements for LI in case of E-UTRAN access and GTP based S5/S8. . 120
12.2.0 General . 120
12.2.1 Provision of Intercept Related Information . 121
12.2.1.0 General . 121
12.2.1.1 X2-interface . 121
12.2.1.2 Structure of the events . 121
12.2.2 X3-interface . 126
12.2.3 EPS related events . 127
12.2.3.1 Attach . 127
12.2.3.2 Detach . 127
12.2.3.3 Bearer activation . 128
12.2.3.4 Bearer deactivation. 128
12.2.3.5 Bearer modification . 129
12.2.3.6 Start of interception with active bearer . 130
12.2.3.7 Tracking Area/EPS Location Update . 130
12.2.3.8 Serving Evolved Packet System . 131
12.2.3.9 UE requested PDN connectivity . 131
12.2.3.10 UE requested PDN disconnection . 131
12.2.3.11 UE requested Bearer Resource Modification . 132
12.2.3.12 Void. 132
12.2.3.13 Start of interception with E-UTRAN attached UE . 132
12.2.3.14 Packet Data Header Information . 133
12.2.3.14.0 Introduction . 133
12.2.3.14.1 Packet Data Header Report . 133
12.2.3.14.2 Packet Data Summary Report . 134
12.2.3.15 HSS subscriber record change. 135
12.2.3.16 Cancel location . 136
12.2.3.17 Register location . 136
12.2.3.18 Location information request . 136
12.3 Functional requirements for LI in case of E-UTRAN access and PMIP based S5/S8 interfaces . 136
12.3.0 General . 136
12.3.1 Provision of intercept related information . 137
12.3.1.0 General . 137
12.3.1.1 X2 interface . 137
12.3.1.2 Structure of the events . 138
12.3.2 X3-interface . 141
12.3.3 LI events for E-UTRAN access with PMIP-based S5 or S8 . 141
12.3.3.1 Initial E-UTRAN Attach and UE PDN requested connectivity with PMIP-based S5 or S8 . 141
12.3.3.2 Detach and PDN disconnection for PMIP-based S5/S8 . 142
12.3.3.3 Start of interception with active tunnel for PMIP based S5/S8 . 142
12.3.3.4 Dedicated Bearer Procedures for E-UTRAN Access with PMIP-based S5/S8 . 142
12.3.3.5 PDN-GW initiated PDN-disconnection Procedure . 142
12.3.3.6 PMIP Session modification . 143
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12.3.3.7 Packet Data Header Information . 143
12.3.3.7.0 Introduction . 143
12.3.3.7.1 Packet Data Header Report . 143
12.3.3.7.2 Packet Data Summary Report . 144
12.4 Functional requirements for LI in case of trusted non-3GPP IP access . 145
12.4.0 General . 145
12.4.1 Provision of Intercept Related Information . 146
12.4.1.0 General . 146
12.4.1.1 X2-interface . 146
12.4.1.2 Structure of the events . 146
12.4.2 X3-interface . 151
12.4.3 LI events for trusted Non-3GPP IP access . 151
12.4.3.1 Initial Attach and PDN connection activation with PMIPv6 on S2a . 151
12.4.3.2 Initial Attach and PDN connection activation procedures with MIPv4 FACoA on S2a. 152
12.4.3.3 Initial Attach and PDN connection activation procedures with DSMIPv6 over S2c . 152
12.4.3.4 Detach and PDN disconnection with PMIPv6 on S2a . 153
12.4.3.5 Detach and PDN disconnection with MIPv4 FACoA . 153
12.4.3.6 Detach and PDN disconnection with DSMIPv6 on S2c . 153
12.4.3.7 PDN-GW reallocation upon initial attach on s2c . 154
12.4.3.8 PDN GW initiated Resource Allocation Deactivation with S2a PMIP .
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