3GPP Scout / Specifications

Specification

3GPP TR 33.929-4: Security; Lawful Interception (LI) implementation guidance; LI for data in 5G core

Published 2026-10-16Updated 2026-10-16

At a glance

Title
Security; Lawful Interception (LI) implementation guidance; LI for data in 5G core
Newest version
V19.0.0 (Rel-19)
Versions indexed
1
Newest per release
Rel-19: V19.0.0 (2026-09-24)

In plain words

TR 33.929-4 gives implementation background for lawful interception (LI) functions, including "other background information which can be useful to implement the LI functions". It illustrates LI for data in the 5G core, focusing on interception aspects for PDU session related events, including handover cases. The scope of interception provided by the LI functions in network functions can depend on services offered by the communications service provider (CSP).

Source: 3GPP TR 33.929-4 V19.0.0, clause 1. © 3GPP Organizational Partners (ARIB, ATIS, CCSA, ETSI, TSDSI, TTA, TTC). Official text: https://www.3gpp.org/ftp/Specs/archive/33_series/33.929-4/33929-4-j00.zip

Sources

  1. 3GPP TR 33.929-4 V19.0.0, clause 1. © 3GPP Organizational Partners (ARIB, ATIS, CCSA, ETSI, TSDSI, TTA, TTC). Official text: https://www.3gpp.org/ftp/Specs/archive/33_series/33.929-4/33929-4-j00.zip
  2. 3GPP TR 33.929-4 V19.0.0, clause 4.1. © 3GPP Organizational Partners (ARIB, ATIS, CCSA, ETSI, TSDSI, TTA, TTC). Official text: https://www.3gpp.org/ftp/Specs/archive/33_series/33.929-4/33929-4-j00.zip

How this page was made

The facts box comes straight from the 3GPP TDoc list and specification archive as indexed by 3GPP Scout. An AI model (GPT-6 Luna) wrote the paragraph and named the source of each sentence. Code checked every quote word for word against the stored source text and every number against the cited source. A second AI model from another company (Claude Opus 5.5) reviewed the paragraph against the same sources. The 3GPP documents themselves govern.