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Content for  TS 33.107  Word version:  18.0.0

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0  Introductionp. 18

This Technical Specification has been produced by the 3GPP TSG SA to allow for the standardisation in the area of lawful interception of telecommunications. This document describes in general the architecture and functions for lawful interception. Laws of individual nations and regional institutions (e.g. European Union), and sometimes licensing and operating conditions define a need to intercept telecommunications traffic and related information in modern telecommunications systems. It has to be noted that lawful interception shall always be done in accordance with the applicable national or regional laws and technical regulations.
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1  Scopep. 19

The present document describes the architecture and functional requirements within a Third Generation Mobile Communication System (3GMS) and the Evolved Packet System (EPS).
The present document shows the service requirements from a Law Enforcement point of view only. The aim of this document is to define a 3GMS and EPS interception system that supports a number of regional interception regulations, but these regulations are not repeated here as they vary. Regional interception requirements shall be met by using specific (regional) mediation functions allowing only required information to be transported.
The handover interfaces for Lawful Interception (LI) of Packet-Data Services, Circuit Switched Services, and Multimedia Services within the UMTS network and Evolved Packet System for Stage 3 are described in TS 33.108.
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2  Referencesp. 19

The following documents contain provisions which, through reference in this text, constitute provisions of the present document.
  • References are either specific (identified by date of publication, edition number, version number, etc.) or non-specific.
  • For a specific reference, subsequent revisions do not apply.
  • For a non-specific reference, the latest version applies. In the case of a reference to a 3GPP document (including a GSM document), a non-specific reference implicitly refers to the latest version of that document in the same Release as the present document.
[1]  Void
[2]
ETSI ES 201 158 (V1.2.1 April 2002): "Lawful Interception; Requirements for network functions".
[3]
ETSI ES 201 671 (V3.1.1 May 2007): "Handover Interface for the lawful interception of telecommunications traffic".
[4]  Void
[5]  Void
[6]  Void
[7]
TS 33.106: "3G Security; Lawful Interception Requirements".
[8]
ANSI J-STD-025-A (April 2003): "Lawfully Authorised Electronic Surveillance".
[9]  Void
[10]
TS 23.060: "General Packet Radio Service (GPRS); Service description".
[11]
TS 33.108: "3G Security; Handover interface for Lawful Interception".
[12]  Void
[13]
TR 21.905: "Vocabulary for 3GPP Specifications".
[14]
TS 23.234: "3GPP system to Wireless Local Area Network (WLAN) Interworking; System Description".
[15]
TS 23.008: "Organization of subscriber data".
[16]
TS 29.234: "3GPP system to Wireless Local Area Network (WLAN) interworking; Stage 3".
[17]
TS 24.234: "3GPP system to Wireless Local Area Network (WLAN) interworking; User Equipment (UE) to network protocols; Stage 3".
[18]
RFC 1122  (October 1989): "Requirements for Internet Hosts -- Communication Layers".
[19]
RFC 1123  (October 1989): "Requirements for Internet Hosts -- Application and Support".
[20]
TS 23.246: "Multimedia Broadcast/Multicast Service (MBMS); Architecture and Functional Description".
[21]
TS 24.147: "Conferencing Using the IP Multimedia (IM) Core Network (CN) subsystem 3GPP Stage 3".
[22]
TS 23.401: "General Packet Radio Service (GPRS) enhancements for Evolved Universal Terrestrial Radio Access Network (E-UTRAN) access".
[23]
TS 23.402: "Architecture enhancements for non-3GPP accesses".
[24]
TS 29.273: "Technical Specification Group Core Network and Terminals; Evolved Packet System (EPS); 3GPP EPS AAA interfaces".
[25]
TS 33.328: "IP Multimedia Subsystem (IMS) media plane security".
[26]
TS 29.212: "Policy and Charging Control (PCC); Reference points".
[27]  Void
[28]
TS 33.310: "Network Domain Security (NDS); Authentication Framework (AF)".
[29]
TS 33.210: "Network Domain Security (NDS); IP network layer security".
[30]
TS 23.272: " Circuit Switched (CS) fallback in Evolved Packet System (EPS); Stage 2"
[31]
TS 22.220: " Service Requirements for Home NodeBs and Home eNodeBs".
[32]
TS 36.300: "Evolved Universal Terrestrial Radio Access (E-UTRA) and Evolved Universal Terrestrial Radio Access Network (E-UTRAN); Overall description; Stage 2".
[33]
TS 25.467: "UTRAN architecture for 3G Home Node B (HNB); Stage 2"
[34]
TS 33.320: "Security of Home Node B (HNB) / Home evolved Node B (HeNB) ".
[35]
TS 33.220: "Generic Authentication Architecture (GAA); Generic Bootstrapping Architecture (GBA)".
[36]
RFC 3966  (December 2004): "The Tel URILs for Telephone Numbers ".
[37]
TS 29.060: "General Packet Radio Service (GPRS); GPRS Tunnelling Protocol (GTP) across the Gn and Gp interface".
[38]
TS 29.274: "3GPP Evolved Packet System (EPS); Evolved General Packet Radio Service (GPRS) Tunnelling Protocol for Control plane (GTPv2-C); Stage 3".
[39]
RFC 791:  "Internet Protocol".
[40]
RFC 2460:  "Internet Protocol, Version 6 (IPv6) Specification".
[41]
RFC 3697:  "IPv6 Flow Label Specification".
[42]
TS 29.334: "IMS Application Level Gateway (IMS-ALG) - IMS Access Gateway (IMS-AGW); Iq Interface (Stage 3)".
[43]
TS 23.228: "IP Multimedia Subsystem; Stage 2".
[44]
TS 23.203: "Policy Charging and Control Architecture".
[45]
TS 23.237: "IP Multimedia Subsystem (IMS) Service Continuity; Stage 2".
[46]
TS 29.162: "Interworking between IM CN subsystem and IP Networks".
[47]
TS 29.163: "Interworking between IP Multimedia Core Network (CN) subsystem and Circuit Switched (CS) Networks"
[48]
TS 23.334: "IP Multimedia Subsystem (IMS) Application Level Gateway (IMS-ALG) - IMS Access Gateway (IMS-AGW) interface: Procedures descriptions".
[49]
TS 24.229: "IP multimedia call control protocol based on Session Initiation Protocol (SIP) and Session Description Protocol (SDP); Stage 3".
[50]
TS 22.278: "Service requirements for the Evolved Packet System (EPS)".
[51]
TS 22.468: "Group Communication System Enablers for LTE (GCSE_LTE)".
[52]
TS 23.303: "Proximity-based services (ProSe); Stage 2".
[53]
TS 23.468: "Group Communication System Enablers for LTE (GCSE_LTE); Stage 2".
[54]  Void.
[55]
TS 24.623: "Technical Specification Group Core Network and Terminals; Extensible Markup Language (XML) Configuration Access Protocol (XCAP) over the Ut interface for Manipulating Supplementary Services".
[56]
RFC 4825:  "The Extensible Markup Language (XML) Configuration Access Protocol (XCAP)".
[57]
TS 33.303: "Proximity-based Services (ProSe); Security aspects".
[58]
TS 24.333: "Proximity-services (ProSe) Management Objects (MO)".
[59]
TS 32.277: "Telecommunication management; Charging management; Proximity-based Services (ProSe) charging".
[60]
TS 22.101: "Universal Mobile Telecommunications System (UMTS); Service aspects; Service principles".
[61]
TS 29.002: "3rd Generation Partnership Project; Technical Specification Group Core Network and Terminals; Mobile Application Part (MAP) specification ".
[62]
TS 29.228: "Technical Specification Group Core Network and Terminals; IP Multimedia (IM) Subsystem Cx and Dx interfaces; Signalling flows and message contents".
[63]
TS 29.328: "Technical Specification Group Core Network and Terminals; IP Multimedia (IM) Subsystem Sh interface; Signalling flows and message contents".
[64]  Void.
[65]
GSMA IR.61: "Wi-Fi Roaming Guidelines".
[66]
TS 29.329: " Technical Specification Group Core Network and Terminals; Evolved Packet System (EPS); 3GPP EPS AAA interfaces ".
[67]
TS 22.071: "Location Services (LCS); Service description; Stage 1".
[68]
TS 23.271: "Functional stage 2 description of Location Services (LCS)".
[69]
RFC 3320:  "Signaling Compression (SigComp)".
[70]
RFC 4896:  "Signaling Compression (SigComp) Corrections and Clarifications".
[71]
GSMA IR.65: "IMS Roaming and Interworking Guidelines".
[72]
MMS Architecture OMA-AD-MMS-V1_3-20110913-A.
[73]
Multimedia Messaging Service Encapsulation Protocol OMA-TS-MMS_ENC-V1_3-20110913-A.
[74]
TS 22.140: "Multimedia Messaging Service (MMS); Stage 1".
[75]
TS 23.214: "Architecture enhancements for control and user plane separation of EPC; Stage 2".
[76]
OMA MLP TS: "Mobile Location Protocol", [http://www.openmobilealliance.org].
[77]
RFC 2822:  "Internet Message Format".
[78]
TS 23.228: "IP Multimedia Subsystem (IMS);Stage 2".
[79]
TS 32.272: "Push-to-talk over Cellular (PoC) charging".
[80]
TS 24.379: "Mission Critical Push To Talk (MCPTT) call control; Protocol specification".
[81]
OMA-TS-PoC_System_Description-V2_1-20110802-A.
[82]
OMA-AD-PoC-V2_1-20110802-A.
[83]
OMA-TS-PoC UserPlane-V2_1-20110802-A.
[84]
TS 23.179: "Functional architecture and information flows to support MCPPT Stage 2".
[85]
TS 22.179: "Mission Critical Push to Talk (MCPTT) over LTE; Stage 1".
[86]
RFC 3550:  "Real Time Transport Protocol".
[87]
RFC 3998:  "Integrated Services Digital Network (ISDN) User Part (ISUP) to Session Initiation Protocol (SIP) Mapping".
[88]
RFC 3261:  "Session Initiation Protocol".
[89]
ETSI TS 103 221-1 (V1.1.1): "Lawful Interception (LI); Internal Network Interface X1 for Lawful Interception".
[90]
TS 33.127: "Lawful Interception (LI) Architecture and Functions".
[91]
TS 36.413: "Evolved Universal Terrestrial Radio Access Network (E-UTRAN); S1 Application Protocol (S1AP)."
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3  Definitions, symbols and abbreviationsp. 22

3.1  Definitionsp. 22

For the purposes of the present document, the terms and definitions given in TR 21.905 and the following apply.
Application layer:
As defined by Internet Engineering Task Force (IETF) in RFC 1123.
Closed access mode:
H(e)NB provides services only to its associated CSG members. A H(e)NB configured for closed access broadcasts a CSG Indicator and a specific CSG Identity.
CUPS:
As defined in TS 23.214, represents PLMN with architecture enhancements for control and user plane separation of EPC nodes.
Hybrid access mode:
H(e)NB provides services to its associated CSG members and to non-CSG members. A H(e)NB configured for hybrid access does not broadcast a CSG Indicator but does broadcast a CSG Identity.
IP layer:
As defined by Internet Engineering Task Force (IETF) in RFC 1122.
Interception Area:
is a subset of the network service area comprised of a set of cells which defines a geographical zone.
Location Dependent Interception:
is interception of a target mobile within a network service area that is restricted to one or several Interception Areas (IA).
MCPTT Identity:
Attributes configured in the MCPTT service that relate to the human user of the MCPTT service.
Non-Local Identity:
As defined by clause 5.1.2 General principles in TS 33.106.
Open access mode:
H(e)NB operates as a normal NodeB or eNodeB. A H(e)NB configured for open access does not broadcast either a CSG Indicator or CSG Identity.
Push to Talk over Cellular (PTC):
This term, when used in the present document, represents either a PoC or MCPTT type service.
S8 Home Routed (S8HR):
The term as used in this standard represents a roaming architecture where PDN-GW and P-CSCF are located in the HPLMN and therefore, UE IMS signalling and media are routed directly to the HPLMN through S8 reference point. Roaming architecture with S8HR for VoLTE is described in GSMA IR.65 [71] clause 2.4.3.
Other LI specific definitions are given in TS 33.108.
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3.2  Abbreviationsp. 23

For the purposes of the present document, the abbreviations given in TR 21.905 and the following apply:
3GMS
3rd Generation Mobile Communications System
3G GGSN
3rd Generation Gateway GPRS Support Node
3G GSN
3rd Generation GPRS Support Node (GGSN/SGSN)
3G MSC
3rd Generation Mobile Switching Centre
3G SGSN
3rd Generation Serving GPRS Support Node
3G UMSC
3rd Generation Unified Mobile Switching Centre
AAA
Authentication, Authorization, and Accounting
ADMF
Administration Function
AGW
Access Gateway
AN
Access Network
AP
Access Provider
AS
Application Server
BBIFF
Bearer Binding Intercept and Forwarding Function
BM-SC
Broadcast-Multicast Service Centre
BSF
Bootstrapping Serving Function
B-TID
Bootstrapping Transaction Identifier
CC
Content of Communication
CS
Circuit Switched
CSCF
Call Session Control Function
CSG
Closed Subscriber Group
CSP
Communications Service Provider
CSR
Cell Site Report
CUPS
Control and User Plane Separation of EPC nodes
DF
Delivery Function
DSMIP
Dual Stack Mobile IP
ECT
Explicit Call Transfer
EPC
Evolved Packet Core
ePDG
Evolved PDG
EPS
Evolved Packet System
E-UTRAN
Evolved UTRAN
FTP
File Transfer Protocol
GBA
Generic Bootstrapping Architecture
GGSN
Gateway GPRS Support Node
GPRS
General Packet Radio Service
GSM
Global System for Mobile communications
GSN
GPRS Support Node (SGSN or GGSN)
HA
Home Agent
HeMS
HeNB Management System
HeNB
Home enhanced NodeB
HeNB GW
HeNB Gateway
H(e)NB
Home and Home enhanced NodeB
HI
Handover Interface
HLR
Home Location Register
HMS
HNB Management System
HNB
Home NodeB
HNB GW
HNB Gateway
HRPD
High Rate Packet Data
HSS
Home Subscriber Server
IA
Interception Area
IBCF
Interconnecting Border Control Function
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)
IETF
Internet Engineering Task Force
IM-MGW
IMS Media Gateway
IMEI
International Mobile station Equipment Identity
IMPI
IP Multimedia Private Identity
IMPU
IP Multimedia Public Identity
IMS
IP Multimedia Core Network Subsystem
IMS-AGW
IMS Access Gateway
IMSI
International Mobile Subscriber Identity
INEs
Intercepting Network Elements (3G MSC Server, 3G GMSC Server, P-CSCF, S-CSCF, SGSN, GGSN, MGW, HLR, AAA Server, PDG)
IP
Internet Protocol
IP-SM-GW
IP-Short-Message-Gateway
IRI
Intercept Related Information
I-WLAN
Interworking WLAN (3GPP WLAN interworking subnetwork)
LALS
Lawful Access Location Services
LAN
Local Area Network
LBO
Local Breakout
LCS
Location Services
LDI
Location Dependent Interception
LEA
Law Enforcement Agency
LEMF
Law Enforcement Monitoring Facility
LIPA
Local IP Access
LMISF
LI Mirror IMS State Function
LTE
Long Term Evolution
MBMS
Multimedia Broadcast/Multicast Service
MC ID
Mission Critical User Identity
MCPTT
Mission Critical Push-To-Talk
MCPTT ID
Mission Critical Push to Talk Identity
MF
Mediation Function
MGCF
Media Gateway Control Function
MGW
Media Gateway
ME
Mobile Entity
MIP
Mobile IP
MM
Multimedia Message
MMBox
Multimedia Message Box
MME
Mobility Management Entity
MN
Mobile Node
MRF
Media Resource Function
MSISDN
Mobile Subscriber ISDN Number
NAF
Network Application Function
NAI
Network Access Identifier
NO
Network Operator
PCRF
Policy and Charging Rules Function
P-CSCF
Proxy CSCF
PDG
Packet Data Gateway
PDN
Packet Data Network
PDN-GW
PDN Gateway
PMIP
Proxy Mobile IP
PoC
Push to talk over Cellular
PS
Packet Switched
PTC
Push to Talk over Cellular
RA
Routing Area
RAI
Routing Area Identity
S8HR
S8 Home Routing
SAI
Service Area Identity
S-CSCF
Serving CSCF
SeGW
Security Gateway
SGSN
Serving GPRS Support Node
SIP
Session Initiation Protocol
SMS
Short Message Service
S-GW
Serving Gateway
SR-VCC
Single Radio Voice Call Continuity
SX3LIF
Split X3 LI Interworking Function
TEL URI
"tel" URI, as defined in RFC 3966
TLS
Transport Layer Security
TrGW
Transit Gateway
TRF
Transit Routing Function
TWAN
Trusted WLAN Access Network
UE
User Equipment
UMTS
Universal Mobile Telecommunication System
URI
Universal Resource Identifier
URL
Universal Resource Locator
VoIP
Voice over IP
VoLTE
Voice over LTE
WLAN
Wireless LAN
WAF
WebRTC Authorisation Function
WebRTC
Web Real Time Communications
WIC
WebRTC IMS Client
WWSF
WebRTC Web Server Function
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