TS 33.127
SA3
★
Lawful Interception Architecture and Functions
use "3GPP‑Page" to get the Word version
use "ETSI‑search" to get the PDF version
for a better overview, the Table of Contents (ToC) is reproduced
use "ETSI‑search" to get the PDF version
for a better overview, the Table of Contents (ToC) is reproduced
V16.3.0 (Wzip)
2020/03 88 p.
V15.4.0 (PDF)
2020/03 55 p.
WI Acronym: LI15
Rapporteur: Mr. Jaspers, Koen
Rapporteur: Mr. Jaspers, Koen
The present document specifies both the architectural and functional system requirements for Lawful Interception (LI)
in 3GPP networks. The present document provides an LI architecture supporting both network layer based and service
layer based Interception.
National regulations determine the specific set of LI functional capabilities that are applicable to a specific 3GPP
operator deployment.
full Table of Contents for TS 33.127 Word version: 16.2.0
1 Scope Word-p. 8
2 References
3 Definitions, symbols and abbreviations Word-p. 9
4 Requirements realisation Word-p. 11
5 Functional architecture
5.1 General
5.2 High-level generic LI architecture Word-p. 12
5.3 Functional entities Word-p. 13
6 Network layer based interception
5.3.1 Law Enforcement Agency (LEA)
5.3.2 Point of Interception (POI)
5.4 LI interfaces
5.3.2.1 General
5.3.2.2 Directly provisioned and triggered POIs
5.3.2.3 IRI-POIs and CC-POIs
5.3.2.4 Failure handling
5.3.3 Triggering Function
5.3.4 Mediation and Delivery Function (MDF) Word-p. 14
5.3.5 Administrative Function (ADMF)
5.3.6 System Information Retrieval Function (SIRF)
5.3.7 LEMF - Law Enforcement Monitoring Facility Word-p. 16
5.4.1 General
5.4.2 Interface LI_SI Word-p. 17
5.4.3 Interface LI_HI1
5.4.4 Interface LI_X1
5.4.5 Interface LI_X2
5.4.6 Interface LI_X3
5.4.7 Interface LI_T Word-p. 19
5.4.8 Interface LI_HI2
5.4.9 Interface LI_HI3
5.4.10 Interface LI_HI4 Word-p. 20
5.4.11 Interface LI_ADMF
5.4.12 Interface LI_MDF
5.5 LI service discovery
5.6 LI in a virtualised environment Word-p. 21
5.4.9 Interface LI_HI3
5.4.10 Interface LI_HI4 Word-p. 20
5.4.11 Interface LI_ADMF
5.4.12 Interface LI_MDF
6.1 General
6.2 5G Word-p. 26
7 Service layer based interception
6.2.1 General
6.2.2 LI at AMF Word-p. 27
6.3 EPC
6.2.2.1 Architecture
6.2.2.2 Target identities Word-p. 28
6.2.2.3 Identity privacy Word-p. 29
6.2.2.4 IRI events
6.2.2.5 Common IRI parameters
6.2.2.6 Specific IRI parameters Word-p. 30
6.2.2.7 Network topologies
6.2.3 LI for SMF/UPF
6.2.2.6 Specific IRI parameters Word-p. 30
6.2.2.7 Network topologies
6.2.3.1 Architecture
6.2.3.2 Target identities Word-p. 32
6.2.3.3 IRI events Word-p. 33
6.2.3.4 Common IRI parameters
6.2.3.5 Specific IRI parameters
6.2.3.6 Network topologies
6.2.4 LI at UDM for 5G Word-p. 34
6.2.5 LI at SMSF
6.2.5.1 Architecture
6.2.5.2 Target identities Word-p. 35
6.2.5.3 IRI events Word-p. 36
6.2.5.4 Common IRI parameters
6.2.5.5 Specific IRI parameters
6.2.5.6 Network topologies
6.2.6 LI support at NRF
6.2.7 External data storage Word-p. 38
6.3.1 General [R16]
6.3.2 LI at the MME [R16]
6.4 3G
6.5 VoNR
6.6 4G/5G Interworking [R16] Word-p. 46
6.3.2.1 Architecture
6.3.2.2 Target identities Word-p. 39
6.3.2.3 IRI events
6.3.2.4 Common IRI parameters
6.3.2.5 Specific IRI parameters Word-p. 40
6.3.2.6 Network topologies
6.3.3 LI at SGW/PGW [R16]
6.3.3.1 Architecture
6.3.3.2 Target identities Word-p. 42
6.3.3.3 IRI events
6.3.3.4 Common IRI parameters
6.3.3.5 Specific IRI parameters
6.3.3.6 Network topologies
6.3.4 LI at ePDG [R16] Word-p. 43
7.1 General
7.2 Central subscriber management
8 LI security and deployment considerations
7.2 Central subscriber management
7.2.1 General
7.2.2 LI at UDM Word-p. 47
7.3 Location
7.2.2.1 Architecture
7.2.2.2 Target identities Word-p. 48
7.2.2.3 Identity privacy
7.2.2.4 IRI events
7.2.2.5 Common IRI parameters
7.2.2.6 Specific IRI parameters Word-p. 49
7.2.2.7 Network topologies
7.2.3 LI at HSS
7.3.1 General
7.3.2 Service usage location reporting
7.3.3 Lawful Access Location Services (LALS) Word-p. 50
7.4 IMS Word-p. 54
7.3.3.1 General
7.3.3.2 Target positioning Word-p. 51
7.3.3.3 Triggered location
7.3.3.4 LI_X2 interface for target positioning and triggered location Word-p. 53
7.3.4 Cell database information reporting
7.4.1 General [R16]
7.4.2 Architecture [R16] Word-p. 55
7.4.3 IRI-POI [R16]
7.5 MMS [R16]
7.6 PTC service [R16]
7.4.3.1 General
7.4.3.2 IRI events
7.4.3.3 Common IRI parameters Word-p. 58
7.4.3.4 Specific IRI parameters
7.4.4 CC-TF and CC-POI [R16]
7.4.5 Correlation of xCC and xIRI [R16] Word-p. 59
7.4.6 Network topologies [R16]
7.4.6.1 General
7.4.6.2 IMS Network Functions providing the IRI-POI
7.4.6.3 IMS Network Functions providing the CC-TF and CC-POI functions Word-p. 60
7.4.7 Roaming cases [R16] Word-p. 62
8.1 Introduction
8.2 Architectural alternatives Word-p. 68
A 5G LI network topology views Word-p. 72
8.2.1 Full target list at every POI node
8.2.2 Full target list only in LICF
8.2.3 Provisioning for registered users
8.3 LI key management at ADMF
8.4 Virtualised LI security Word-p. 69
8.5 Points of Interception
8.6 Deployment considerations [R16] Word-p. 70
A.1 Non-roaming scenario
A.2 Interworking with EPC/E-UTRAN Word-p. 73
A.3 Multiple DN connections in a PDU session Word-p. 76
A.4 Non-3GPP access in a non-roaming scenario Word-p. 78
Z Change history Word-p. 80
