3GPP SA3-LI is a subcommittee of 3GPP SA3 and is responsible for supporting LI on the services defined by 3GPP. Services all know: 4G, 5G, IMS.

Meetings

SA3-LI has several meetings per year. It follows the overall 3GPP release schema to support new features. Interaction with the various other 3GPP groups is common.

Delegates in SA3-LI represent LEAs, CSPs, network vendors and lawful interception vendors.

Ongoing work

3GPP SA3-LI is currently working on the following topics:

  • 5G LI refinements
  • Porting of 4G LI features to 3GPP TS 33.128

Published specifications

3GPP TS 33.128: LI implementation

Next generation of TS 33.108, introduces support for LI on 5G networks. In this new generation, the HI2/HI3 interfaces have been delegated to ETSI TS 102 232-7. Additionally, network vendors are now expected to implement the standardized X1/X2/X3 interfaces as defined in ETSI TS 103 221.

Download the latest version from the 3GPP website.

3GPP TS 33.127: LI architecture

Next generation of TS 33.107. Various new concepts have been introduced, specifically around the more dynamic and flexible nature of virtualisation.

Download the latest version from the 3GPP website.

3GPP TS 33.126: LI requirements

Similar to TS 33.106 and essentially the "next generation" of LI requirements. Specifically, requirements around security and virtualisation have a major impact to the architecture.

Download the latest version from the 3GPP website.

3GPP TS 33.108: LI implementation

Defines the HI2/HI3 interfaces used for 2G, 3G, 4G mobile data interception, CS services, IMS and several other services.

Download the latest version from the 3GPP website.

Note that this specification is becoming less important since the publication of 3GPP TS 33.128.

3GPP TS 33.107: LI architecture

Defines the overall LI architecture for the services supported in TS 33.108. Also defines that a (typically proprietary) X2/X3 implementation is mandatory for implementation by the network vendors.

Download the latest version from the 3GPP website.

3GPP TS 33.106: LI requirements

Defines the overall LI requirements in a 3GPP context.

Download the latest version from the 3GPP website.