My 4G lawful interception notes

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Evolved Packet Systems (EPS)

  • 3GPP TS 33.107
  • 3GPP TS 33.108

EPS Data

IRI

The following events are applicable to the MME:

  • Attach;
  • Detach;
  • Tracking Area/EPS Location Update;
  • UE requested PDN connectivity;
  • UE Requested PDN disconnection;
  • Start of interception with E-UTRAN attached UE.

The following events are applicable to the Serving GW (S-GW) and PDN GW (P-GW):

  • Bearer activation (valid for both Default and Dedicated bearer);
  • Start of intercept with bearer active;
  • Bearer modification;
  • Bearer deactivation;
  • UE Requested Bearer Resource Modification;
  • Packet Data Header Information.

The following events are applicable to the HSS:

  • Serving Evolved Packet System.
  • HSS subscriber record change;
  • Cancel location
  • Register location;
  • Location information request.

The following LALS Reports are applicable to the EPS (see Clause 19):

  • Report for LALS Target Positioning;
  • Report for LALS Enhanced Location for IRI.

Home Subscriber Server (HSS) IRI

Clause 10.5.1.1

  • as a national option, a mobile terminal is authorized for service with another network operator or service provider; in that case, other related events are required as cancel location, register location, location information request from a third party’s node;
  • as a national option, a REPORT record have to be generated when there is a HSS subscriber record change of IMSI or of MSISDN or IMEI triggered by a messages to or from the HSS;

IRI reports

  • Table 10.5.1.1.12: Serving Evolved Packet System REPORT Record
  • Table 10.5.1.1.17: HSS subscriber record change REPORT Record
  • Table 10.5.1.1.18: Cancel location REPORT Record
  • Table 10.5.1.1.19: Register location REPORT Record
  • Table 10.5.1.1.20: Location information request REPORT Record


EPS Multimedia

This includes IMS-based voice (VoLTE) or other services.

33.108 12.1.4 Lawful intercept identifier (LIID) and Network identifier are same as data. The correlation number is unique per VoIP session.

For IMS-based VoIP, the S-CSCF and optionally, the P-CSCF provide the IRI events. For IMS-based VoIP, the functional element that provides the communication content (CC) interception depends on the call scenario and network configuration.

The term "CC Intercept Function" is a generic term used to denote a network function that has access to the voice media of an intercepted call. The term "CC Interception Triggering Function" is a generic term used to denote a network function that provides a trigger to intercept the CC.

As described in 33.107, CC interception may be done by one of the following functional elements (referred to as CC Intercept Function)

  • PDN-GW/GGSN
  • IMS-AGW
  • TrGW
  • IM-MGW
  • MRF

The trigger to perform the CC interception at the above functional elements may be provided by the following functional elements (referred to as CC Interception Triggering Function)

CC Interception Triggering Function CC Intercept Function
P-CSCF PDN-GW/GGSN
P-CSCF IMS-AGW
IBCF TrGW
MGCF IM-MGW
S-CSCF MRF

Abbreviations

3GPP TS 33.107 V15.6.0 (2019-06)

Abbreviation Description Source
3GMS 3rd Generation Mobile Communications System 3GPP TS 33.107 V15.6.0 (2019-06)
3G GGSN 3rd Generation Gateway GPRS Support Node 3GPP TS 33.107 V15.6.0 (2019-06)
3G GSN 3rd Generation GPRS Support Node (GGSN/SGSN) 3GPP TS 33.107 V15.6.0 (2019-06)
3G MSC 3rd Generation Mobile Switching Centre 3GPP TS 33.107 V15.6.0 (2019-06)
3G SGSN 3rd Generation Serving GPRS Support Node 3GPP TS 33.107 V15.6.0 (2019-06)
3G UMSC 3rd Generation Unified Mobile Switching Centre 3GPP TS 33.107 V15.6.0 (2019-06)
AAA Authentication, Authorization, and Accounting 3GPP TS 33.107 V15.6.0 (2019-06)
ADMF Administration Function 3GPP TS 33.107 V15.6.0 (2019-06)
AGW Access Gateway 3GPP TS 33.107 V15.6.0 (2019-06)
AN Access Network 3GPP TS 33.107 V15.6.0 (2019-06)
AP Access Provider 3GPP TS 33.107 V15.6.0 (2019-06)
AS Application Server 3GPP TS 33.107 V15.6.0 (2019-06)
BBIFF Bearer Binding Intercept and Forwarding Function 3GPP TS 33.107 V15.6.0 (2019-06)
BM-SC Broadcast-Multicast Service Centre 3GPP TS 33.107 V15.6.0 (2019-06)
BSF Bootstrapping Serving Function 3GPP TS 33.107 V15.6.0 (2019-06)
B-TID Bootstrapping Transaction Identifier 3GPP TS 33.107 V15.6.0 (2019-06)
CC Content of Communication 3GPP TS 33.107 V15.6.0 (2019-06)
CS Circuit Switched 3GPP TS 33.107 V15.6.0 (2019-06)
CSCF Call Session Control Function 3GPP TS 33.107 V15.6.0 (2019-06)
CSG Closed Subscriber Group 3GPP TS 33.107 V15.6.0 (2019-06)
CSP Communications Service Provider 3GPP TS 33.107 V15.6.0 (2019-06)
CSR Cell Site Report 3GPP TS 33.107 V15.6.0 (2019-06)
CUPS Control and User Plane Separation of EPC nodes 3GPP TS 33.107 V15.6.0 (2019-06)
DF Delivery Function 3GPP TS 33.107 V15.6.0 (2019-06)
DSMIP Dual Stack Mobile IP 3GPP TS 33.107 V15.6.0 (2019-06)
ECT Explicit Call Transfer 3GPP TS 33.107 V15.6.0 (2019-06)
EPC Evolved Packet Core 3GPP TS 33.107 V15.6.0 (2019-06)
ePDG Evolved PDG 3GPP TS 33.107 V15.6.0 (2019-06)
EPS Evolved Packet System 3GPP TS 33.107 V15.6.0 (2019-06)
E-UTRAN Evolved UTRAN 3GPP TS 33.107 V15.6.0 (2019-06)
FTP File Transfer Protocol 3GPP TS 33.107 V15.6.0 (2019-06)
GBA Generic Bootstrapping Architecture 3GPP TS 33.107 V15.6.0 (2019-06)
GGSN Gateway GPRS Support Node 3GPP TS 33.107 V15.6.0 (2019-06)
GPRS General Packet Radio Service 3GPP TS 33.107 V15.6.0 (2019-06)
GSM Global System for Mobile communications 3GPP TS 33.107 V15.6.0 (2019-06)
GSN GPRS Support Node (SGSN or GGSN) 3GPP TS 33.107 V15.6.0 (2019-06)
HA Home Agent 3GPP TS 33.107 V15.6.0 (2019-06)
HeMS HeNB Management System 3GPP TS 33.107 V15.6.0 (2019-06)
HeNB Home enhanced NodeB 3GPP TS 33.107 V15.6.0 (2019-06)
HeNB GW HeNB Gateway 3GPP TS 33.107 V15.6.0 (2019-06)
H(e)NB Home and Home enhanced NodeB 3GPP TS 33.107 V15.6.0 (2019-06)
HI Handover Interface 3GPP TS 33.107 V15.6.0 (2019-06)
HLR Home Location Register 3GPP TS 33.107 V15.6.0 (2019-06)
HMS HNB Management System 3GPP TS 33.107 V15.6.0 (2019-06)
HNB Home NodeB 3GPP TS 33.107 V15.6.0 (2019-06)
HNB GW HNB Gateway 3GPP TS 33.107 V15.6.0 (2019-06)
HRPD High Rate Packet Data 3GPP TS 33.107 V15.6.0 (2019-06)
HSS Home Subscriber Server 3GPP TS 33.107 V15.6.0 (2019-06)
IA Interception Area 3GPP TS 33.107 V15.6.0 (2019-06)
IBCF Interconnecting Border Control Function 3GPP TS 33.107 V15.6.0 (2019-06)
ICEs Intercepting Control Elements (3G MSC Server, 3G GMSC Server, P-CSCF, S-CSCF, SGSN, GGSN, HLR, AAA Server, PDG, MME, S-GW, PDN-GW, HSS) 3GPP TS 33.107 V15.6.0 (2019-06)
IETF Internet Engineering Task Force 3GPP TS 33.107 V15.6.0 (2019-06)
IM-MGW IMS Media Gateway 3GPP TS 33.107 V15.6.0 (2019-06)
IMEI International Mobile station Equipment Identity 3GPP TS 33.107 V15.6.0 (2019-06)
IMPI IP Multimedia Private Identity 3GPP TS 33.107 V15.6.0 (2019-06)
IMPU IP Multimedia Public Identity 3GPP TS 33.107 V15.6.0 (2019-06)
IMS IP Multimedia Core Network Subsystem 3GPP TS 33.107 V15.6.0 (2019-06)
IMS-AGW IMS Access Gateway 3GPP TS 33.107 V15.6.0 (2019-06)
IMSI International Mobile Subscriber Identity 3GPP TS 33.107 V15.6.0 (2019-06)
INEs Intercepting Network Elements (3G MSC Server, 3G GMSC Server, P-CSCF, S-CSCF, SGSN, GGSN, MGW, HLR, AAA Server, PDG) 3GPP TS 33.107 V15.6.0 (2019-06)
IP Internet Protocol 3GPP TS 33.107 V15.6.0 (2019-06)
IP-SM-GW IP-Short-Message-Gateway 3GPP TS 33.107 V15.6.0 (2019-06)
IRI Intercept Related Information 3GPP TS 33.107 V15.6.0 (2019-06)
I-WLAN Interworking WLAN (3GPP WLAN interworking subnetwork) 3GPP TS 33.107 V15.6.0 (2019-06)
LALS Lawful Access Location Services 3GPP TS 33.107 V15.6.0 (2019-06)
LAN Local Area Network 3GPP TS 33.107 V15.6.0 (2019-06)
LBO Local Breakout 3GPP TS 33.107 V15.6.0 (2019-06)
LCS Location Services 3GPP TS 33.107 V15.6.0 (2019-06)
LDI Location Dependent Interception 3GPP TS 33.107 V15.6.0 (2019-06)
LEA Law Enforcement Agency 3GPP TS 33.107 V15.6.0 (2019-06)
LEMF Law Enforcement Monitoring Facility 3GPP TS 33.107 V15.6.0 (2019-06)
LIPA Local IP Access 3GPP TS 33.107 V15.6.0 (2019-06)
LMISF LI Mirror IMS State Function 3GPP TS 33.107 V15.6.0 (2019-06)
LTE Long Term Evolution 3GPP TS 33.107 V15.6.0 (2019-06)
MBMS Multimedia Broadcast/Multicast Service 3GPP TS 33.107 V15.6.0 (2019-06)
MC ID Mission Critical User Identity 3GPP TS 33.107 V15.6.0 (2019-06)
MCPTT Mission Critical Push-To-Talk 3GPP TS 33.107 V15.6.0 (2019-06)
MCPTT ID Mission Critical Push to Talk Identity 3GPP TS 33.107 V15.6.0 (2019-06)
MF Mediation Function 3GPP TS 33.107 V15.6.0 (2019-06)
MGCF Media Gateway Control Function 3GPP TS 33.107 V15.6.0 (2019-06)
MGW Media Gateway 3GPP TS 33.107 V15.6.0 (2019-06)
ME Mobile Entity 3GPP TS 33.107 V15.6.0 (2019-06)
MIP Mobile IP 3GPP TS 33.107 V15.6.0 (2019-06)
MM Multimedia Message 3GPP TS 33.107 V15.6.0 (2019-06)
MMBox Multimedia Message Box 3GPP TS 33.107 V15.6.0 (2019-06)
MME Mobility Management Entity 3GPP TS 33.107 V15.6.0 (2019-06)
MN Mobile Node 3GPP TS 33.107 V15.6.0 (2019-06)
MRF Media Resource Function 3GPP TS 33.107 V15.6.0 (2019-06)
MSISDN Mobile Subscriber ISDN Number 3GPP TS 33.107 V15.6.0 (2019-06)
NAF Network Application Function 3GPP TS 33.107 V15.6.0 (2019-06)
NAI Network Access Identifier 3GPP TS 33.107 V15.6.0 (2019-06)
NO Network Operator 3GPP TS 33.107 V15.6.0 (2019-06)
PCRF Policy and Charging Rules Function 3GPP TS 33.107 V15.6.0 (2019-06)
P-CSCF Proxy CSCF 3GPP TS 33.107 V15.6.0 (2019-06)
PDG Packet Data Gateway 3GPP TS 33.107 V15.6.0 (2019-06)
PDN Packet Data Network 3GPP TS 33.107 V15.6.0 (2019-06)
PDN-GW PDN Gateway 3GPP TS 33.107 V15.6.0 (2019-06)
PMIP Proxy Mobile IP 3GPP TS 33.107 V15.6.0 (2019-06)
PoC Push to talk over Cellular 3GPP TS 33.107 V15.6.0 (2019-06)
PS Packet Switched 3GPP TS 33.107 V15.6.0 (2019-06)
PTC Push to Talk over Cellular 3GPP TS 33.107 V15.6.0 (2019-06)
RA Routing Area 3GPP TS 33.107 V15.6.0 (2019-06)
RAI Routing Area Identity 3GPP TS 33.107 V15.6.0 (2019-06)
S8HR S8 Home Routing 3GPP TS 33.107 V15.6.0 (2019-06)
SAI Service Area Identity 3GPP TS 33.107 V15.6.0 (2019-06)
S-CSCF Serving CSCF 3GPP TS 33.107 V15.6.0 (2019-06)
SeGW Security Gateway 3GPP TS 33.107 V15.6.0 (2019-06)
SGSN Serving GPRS Support Node 3GPP TS 33.107 V15.6.0 (2019-06)
SIP Session Initiation Protocol 3GPP TS 33.107 V15.6.0 (2019-06)
SMS Short Message Service 3GPP TS 33.107 V15.6.0 (2019-06)
S-GW Serving Gateway 3GPP TS 33.107 V15.6.0 (2019-06)
SR-VCC Single Radio Voice Call Continuity 3GPP TS 33.107 V15.6.0 (2019-06)
SX3LIF Split X3 LI Interworking Function 3GPP TS 33.107 V15.6.0 (2019-06)
TEL URI "tel" URI, as defined in RFC 3966 [ 36] 3GPP TS 33.107 V15.6.0 (2019-06)
TLS Transport Layer Security 3GPP TS 33.107 V15.6.0 (2019-06)
TrGW Transit Gateway 3GPP TS 33.107 V15.6.0 (2019-06)
TRF Transit Routing Function 3GPP TS 33.107 V15.6.0 (2019-06)
TWAN Trusted WLAN Access Network 3GPP TS 33.107 V15.6.0 (2019-06)
UE User Equipment 3GPP TS 33.107 V15.6.0 (2019-06)
UMTS Universal Mobile Telecommunication System 3GPP TS 33.107 V15.6.0 (2019-06)
URI Universal Resource Identifier 3GPP TS 33.107 V15.6.0 (2019-06)
URL Universal Resource Locator 3GPP TS 33.107 V15.6.0 (2019-06)
VoIP Voice over IP 3GPP TS 33.107 V15.6.0 (2019-06)
VoLTE Voice over LTE 3GPP TS 33.107 V15.6.0 (2019-06)
WLAN Wireless LAN 3GPP TS 33.107 V15.6.0 (2019-06)
WAF WebRTC Authorisation Function 3GPP TS 33.107 V15.6.0 (2019-06)
WebRTC Web Real Time Communications 3GPP TS 33.107 V15.6.0 (2019-06)
WIC WebRTC IMS Client 3GPP TS 33.107 V15.6.0 (2019-06)
WWSF WebRTC Web Server Function 3GPP TS 33.107 V15.6.0 (2019-06)

Resources

My 3GPP TS 23.228 Notes

My lawful interception notes
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