TR 33.928
ADMF Logic for provisioning Lawful Interception (LI)
V18.3.0 (PDF)
2024/03 … p.
- Rapporteur:
- Mr. Rao, Nagaraja
Nokia Corporation
full Table of Contents for TR 33.928 Word version: 18.1.0
0 Introduction
1 Scope
2 References
3 Definitions of terms, symbols and abbreviations
4 ADMF and provisioning
5 LIPF logic
5.1 Background
5.2 Governing scenarios
5.3 Top-level LIPF provisioning logic
5.4 Data
5.5 Voice
5.6 Messaging
5.7 PTC
5.8 LALS
5.9 Location Acquisition
5.10 RCS
$ Change history
0 Introduction p. 5
The LI technical specifications (TS 33.126, TS 33.127, TS 33.128) contain the normative part of the LI requirements and the technical report TR 33.929 [5] contains additional information as an implementation guidance for LI. The ADMF that receives the warrant information from the Law Enforcement Agencies has the task of provisioning the LI functions present in various Network Functions (NFs) of the serving CSP network. Upon provisioning, the LI is activated in those NFs, and accordingly, the LI functions within those NFs monitor the target's communications and provide the LI as required by the warrant.
The scope of the NFs that provide the LI functions within the CSP network is determined based on various factors such as LI service type, CSP deployment choice, scope of LI as authorized in the warrant. The present document provides the logic used within the ADMF in provisioning the LI functions considering those points.
1 Scope p. 6
The present document provides ADMF provisioning logic for LI in association with the LI functions defined in TS 33.126, TS 33.127 and TS 33.128.
2 References p. 6
3 Definitions of terms, symbols and abbreviations p. 6
4 ADMF and provisioning p. 7
4.1 Overview p. 7
4.2 General p. 7
5 LIPF logic p. 10
5.1 Background p. 10
5.2 Governing scenarios p. 10
5.3 Top-level LIPF provisioning logic p. 11
5.3.1 LIPF logic for initial configuration p. 11
5.3.2 LI provisioning logic in LIPF p. 11
5.3.3 Service-based LI provisioning logic in LIPF p. 11
5.4 Data p. 12
5.4.1 Scope of interception p. 12
5.4.2 Top-level view p. 12
5.4.3 5GC p. 13
5.4.3.1 The flow-chart p. 13
5.4.3.3 LI provisioning for additional data services in 5GC p. 17
5.4.3.3.1 LI provisioning for AKMA p. 17
5.4.3.3.2 LI provisioning for NEF based services p. 18
5.4.3.3.2.1 Scope of interception p. 18
5.4.3.3.2.2 The flow-chart p. 18
5.4.3.3.2.3 Interception p. 19
5.4.3.3.3 LI provisioning for Edge Computing Service p. 20
5.4.3.3.4 LI provisioning for 5G Media Streaming p. 20
5.4.4 EPC p. 21
5.4.4.1 The flow-chart p. 21
5.4.4.2 Interception p. 24
5.4.4.2.1 PDHR p. 24
5.4.4.2.2 LALS triggering p. 24
5.4.4.2.3 SGW/PGW deployment options p. 24
5.4.4.2.4 HSS p. 25
5.4.4.2.5 Summary p. 25
5.4.4.3 LI provisioning for additional data services in EPC p. 26
5.5 Voice p. 28
5.5.1 Scope of interception p. 28
5.5.2 Initial configuration for N9HR/S8HR p. 28
5.5.3 Top level LIPF logic for service type voice p. 29
5.5.4 LIPF logic for targets that are not non-local ID p. 30
5.5.4.1 The flowchart p. 30
5.5.4.2 Interception p. 36
5.5.4.2.1 IMS deployment p. 36
5.5.4.2.2 LALS triggering p. 36
5.5.4.2.3 Summary p. 36
5.5.4.2.4 STIR/SHAKEN p. 38
5.5.5 LIPF logic for targets that are non-local ID p. 40
5.5.5.1 The flowchart p. 40
5.5.5.2 Interception p. 44
5.6 Messaging p. 46
5.6.1 Scope of interception p. 46
5.6.2 LIPF logic for service type messaging p. 47
5.6.2.1 Flowcharts p. 47
5.6.2.2 Interception p. 51
5.7 PTC p. 52
5.8 LALS p. 54
5.9 Location Acquisition p. 54
5.10 RCS p. 55
5.10.1 Scope of interception p. 55
5.10.2 LIPF logic for service type of RCS p. 56
5.10.3 Interception p. 59
5.10.3.1 Deployment p. 59
5.10.3.2 Summary p. 59
$ Change history p. 62
