TS 33.127 – Lawful Interception Architecture
3GPP TS 33.127 is the 3GPP Technical Specification for Lawful Interception Architecture. Its official 3GPP title is “Lawful Interception (LI) architecture and functions”. It is published in 5 releases (Rel-15 to Rel-19); the latest version is 19.8.0 in Rel-19.
Defines the 3GPP architecture and functional requirements for lawful interception across 5G, EPS, IMS, location services, and other network and service domains.
Releases and versions of TS 33.127
| Release | Latest version | Links |
|---|---|---|
| Rel-19 | 19.8.0 | Read · Download (3GPP) |
| Rel-18 | 18.15.0 | Read · Download (3GPP) |
| Rel-17 | 17.17.0 | Read · Download (3GPP) |
| Rel-16 | 16.14.0 | Read · Download (3GPP) |
| Rel-15 | 15.5.0 | Read · Download (3GPP) |
Scope of TS 33.127
Category: Security (Lawful Interception). Technology generation: Multi-Gen. Network layer: Security.
Who should read this specification?
- Network operators
- Device manufacturers
- Regulators and standards bodies
- Researchers and academics
Implementation notes
Complexity level: Expert. Implementation difficulty: High.
Key technologies
Specifications referenced by TS 33.127
- TS 33.107 Lawful Interception Architecture & Functions
- TS 23.214 Control and User Plane Separation for EPC
- TS 23.228 IP Multimedia Core Network Subsystem
- TS 38.413 NG Application Protocol (NGAP) Specification
- TS 33.128 Lawful Interception Protocols and Procedures
- TS 22.140 MMS Stage 1 Requirements
- TR 21.905 3GPP Terminology and Definitions
- TS 33.108 LI Handover Interface Specification
- TS 23.401 Evolved Packet System Architecture
- TS 23.402 EPC for Non-3GPP Access (PMIP)
- TS 23.280 Common Functional Architecture for Mission Critical Services
- TS 24.147 IMS Conferencing Protocol Details
Specifications that reference TS 33.127
Other specifications in the 33 series
- TS 33.116 Security Assurance Specification for MME
- TS 33.117 Catalogue of Security Requirements and Tests
- TS 33.122 CAPIF Security Architecture Specification
- TS 33.126 Lawful Interception Requirements
- TS 33.128 Lawful Interception Protocols and Procedures
- TS 33.141 Security for Presence Service (Ut reference point)
- TS 33.163 Battery Efficient Security for Low Throughput MTC
- TS 33.179 MCPTT Security Architecture and Procedures
Frequently asked questions
What is 3GPP TS 33.127?
3GPP TS 33.127 is the 3GPP Technical Specification for Lawful Interception Architecture. Defines the 3GPP architecture and functional requirements for lawful interception across 5G, EPS, IMS, location services, and other network and service domains.
Which 3GPP releases include TS 33.127?
TS 33.127 is published in 5 releases, from Rel-15 to Rel-19. The latest version on 3GPP Explorer is 19.8.0 (Rel-19).
What category does TS 33.127 belong to?
TS 33.127 belongs to the Security (Lawful Interception) category of 3GPP specifications. It applies to Multi-Gen networks.
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