SIST-TS ETSI/TS 102 232-5 V3.5.1:2016

SLOVENSKI STANDARD
SIST-TS ETSI/TS 102 232-5 V3.5.1:2016
01-februar-2016
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Lawful Interception (LI);Handover Interface and Service-Specific Details (SSD) for IP

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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3GPP and LTE™ are Trade Marks of ETSI registered for the benefit of its Members and

GSM® and the GSM logo are Trade Marks registered and owned by the GSM Association.

Intellectual Property Rights ................................................................................................................................ 5

Foreword ............................................................................................................................................................. 5

Modal verbs terminology .................................................................................................................................... 5

Introduction ........................................................................................................................................................ 5

1 Scope ........................................................................................................................................................ 6

2 References ................................................................................................................................................ 6

2.1 Normative references ......................................................................................................................................... 6

2.2 Informative references ........................................................................................................................................ 7

3 Definitions and abbreviations ................................................................................................................... 7

3.1 Definitions .......................................................................................................................................................... 7

3.2 Abbreviations ..................................................................................................................................................... 7

4 General ..................................................................................................................................................... 8

4.1 Reference Model for Lawful Interception .......................................................................................................... 8

4.2 Reference system model ................................................................................................................................... 10

4.2.1 Network layer Interception ......................................................................................................................... 10

4.2.2 Service layer Interception ........................................................................................................................... 11

4.3 General Requirements ...................................................................................................................................... 11

5 Interception of IP Multimedia services .................................................................................................. 12

5.1 Identification of target of interception .............................................................................................................. 12

5.1.1 SIP Target Identification ............................................................................................................................. 12

5.1.2 H.323 Target Identification ......................................................................................................................... 12

5.2 Interception of signalling .................................................................................................................................. 12

5.2.1 Provisioning of the SIP IRI IIF ................................................................................................................... 12

5.2.2 Provisioning of the H.323 IRI IIF ............................................................................................................... 12

5.2.3 Location information .................................................................................................................................. 13

5.3 Assigning a value to the Communication Identity Number ............................................................................. 13

5.3.1 Assigning a CIN value to SIP related IRI ................................................................................................... 13

5.3.2 Assigning a CIN value to H.323 related IRI ............................................................................................... 13

5.4 Events and IRI record types ............................................................................................................................. 13

5.5 Interception of Content of Communication ...................................................................................................... 14

5.6 Direction for IMS IRI for Signalling Messages ............................................................................................... 14

5.7 Direction for IMS sessions ............................................................................................................................... 15

5.7.1 Direction for SIP sessions ........................................................................................................................... 15

5.7.2 Direction for H.323 sessions ....................................................................................................................... 15

6 Handover Interface ................................................................................................................................. 15

6.1 Intercepted Related Information ....................................................................................................................... 15

6.2 Correlation of IRI and CC ................................................................................................................................ 15

7 ASN.1 specification for IRI and CC....................................................................................................... 15

Annex A (informative): Interception using H.248 ............................................................................... 19

A.1 Purpose of this annex ............................................................................................................................. 19

A.2 Notes on interception using H.248 ......................................................................................................... 19

A.2.1 Target identification (see also clause 5.1) ........................................................................................................ 19

A.2.2 Provisioning of the H.248 IRI IIF (see also clause 5.2) ................................................................................... 20

A.3 Problems in H.248 interception .............................................................................................................. 20

A.3.1 Missing information in H.248 signalling .......................................................................................................... 20

A.3.2 Missing call content.......................................................................................................................................... 21

Annex B (normative): Minimum set of functional attributes to be provided ................................. 22

B.1 General requirements ............................................................................................................................. 22

B.2 Result of interception ............................................................................................................................. 22

B.3 Location information .............................................................................................................................. 23

B.4 Time constraints ..................................................................................................................................... 23

B.5 Technical handover interfaces and format requirements ........................................................................ 24

Annex C (informative): Change request history .................................................................................. 25

History .............................................................................................................................................................. 27

IPRs essential or potentially essential to the present document may have been declared to ETSI. The information

pertaining to these essential IPRs, if any, is publicly available for ETSI members and non-members, and can be found

in ETSI SR 000 314: "Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to ETSI in

respect of ETSI standards", which is available from the ETSI Secretariat. Latest updates are available on the ETSI Web

Pursuant to the ETSI IPR Policy, no investigation, including IPR searches, has been carried out by ETSI. No guarantee

can be given as to the existence of other IPRs not referenced in ETSI SR 000 314 (or the updates on the ETSI Web

This Technical Specification (TS) has been produced by ETSI Technical Committee Lawful Interception (LI).

The present document is part 5 of a multi-part deliverable. Full details of the entire series can be found in part 1 [2].

The ASN.1 module is also available as an electronic attachment to the original document from the ETSI site (see

In the present document "shall", "shall not", "should", "should not", "may", "need not", "will", "will not", "can" and

"cannot" are to be interpreted as described in clause 3.2 of the ETSI Drafting Rules (Verbal forms for the expression of

"must" and "must not" are NOT allowed in ETSI deliverables except when used in direct citation.

The present document focuses on Lawful Interception of IP Multimedia Services. It is to be used in conjunction with

ETSI TS 102 232-1 [2], in which the handling of the intercepted information is described.

The present document specifies interception of Internet Protocol (IP) Multimedia (MM) Services based on the Session

Initiation Protocol (SIP) and Real Time Transport Protocol (RTP) and Message Session Relay Protocol (MSRP) and IP

The present document is consistent with the definition of the Handover Interface, as described in ETSI

The present document does not override or supersede any specifications or requirements in 3GPP TS 33.108 [9] and

References are either specific (identified by date of publication and/or edition number or version number) or

non-specific. For specific references, only the cited version applies. For non-specific references, the latest version of the

Referenced documents which are not found to be publicly available in the expected location might be found at

NOTE: While any hyperlinks included in this clause were valid at the time of publication, ETSI cannot guarantee

The following referenced documents are necessary for the application of the present document.

[1] ETSI TS 101 671: "Lawful Interception (LI); Handover interface for the lawful interception of

NOTE: Periodically TS 101 671 is published as ES 201 671. A reference to the latest version of the TS as above

[2] ETSI TS 102 232-1: "Lawful Interception (LI); Handover Interface and Service-Specific Details

[3] Recommendation ITU-T X.680: "Information technology - Abstract Syntax Notation One

[6] Recommendation ITU-T H.323: "Packet-based multimedia communications systems".

NOTE: H.248 was renumbered when revised on 2002-03-29. H.248 main body, Annexes A to E and Appendix I

were included in H.248.1. Subsequent annexes were sequentially numbered in the series, e.g. H.248

[9] ETSI TS 133 108: "Universal Mobile Telecommunications System (UMTS); LTE; 3G security;

[10] ETSI TS 101 331: "Lawful Interception (LI); Requirements of Law Enforcement Agencies".

[11] ATIS-PP-1000678.2006: "Lawfully Authorized Electronic Surveillance (LAES) for Voice over

Packet Technologies in Wireline Telecommunications Networks", Version 2 (Revision of

[12] Recommendation ITU-T H.225.0: "Call signalling protocols and media stream packetization for

[13] Recommendation ITU-T H.245: "Control protocol for multimedia communication".

[16] Recommendation ITU-T T.38: "Procedures for real-time Group 3 facsimile communication over

References are either specific (identified by date of publication and/or edition number or version number) or

non-specific. For specific references, only the cited version applies. For non-specific references, the latest version of the

NOTE: While any hyperlinks included in this clause were valid at the time of publication, ETSI cannot guarantee

The following referenced documents are not necessary for the application of the present document but they assist the

[i.1] ETSI TR 102 528: "Lawful Interception (LI); Interception domain Architecture for IP networks".

[i.2] ETSI TR 102 503: "Lawful Interception (LI); ASN.1 Object Identifiers in Lawful Interception and

For the purposes of the present document, the terms and definitions given in ETSI TS 101 671 [1], ETSI

IP MultiMedia service: multimedia service that utilizes the Internet Protocol (IP) for the transport of data

MultiMedia (MM): use of computers to present text, graphics, video, animation, and sound in an integrated way

MultiMedia service: communication service that offers Multimedia communication to end-users

NOTE: Terminations may be physical, such as a given channel on a TDM line, or ephemeral, such as an IP

TSAP identifier: piece of information used to multiplex several transport connections of the same type on a single

H.323 entity with all transport connections sharing the same Network Address (e.g. the port number in a TCP/UDP/IP

NOTE: Transport layer Service Access Point (TSAP) identifiers may be (pre)assigned statically by some

international authority or may be allocated dynamically during the setup of a call. Dynamically assigned

TSAP identifiers are of transient nature, i.e. their values are only valid for the duration of a single call.

The present document adopts the generic reference model for the interception domain from ETSI TR 102 528 [i.1], its

internal intercept functions, Intercept Related Information Interception Function (IRI IIF), Content of Communication

Trigger Function (CCTF), and Content of Communication Internal Interception Function (CC IIF), and the Internal

Network Interfaces INI1, INI2, INI3, Content of Communication Trigger Interface (CCTI) and Content of

• INI1a provisions Intercept Related Information Internal Interception Function (IRI IIF).

• INI1b may (statically) provision Content of Communications Trigger Function (CCTF).

• Intercept Related Information Internal Intercept Function (IRI IIF) generates IRI.

• Content of Communication Trigger Interface (CCTI) may trigger CCTF for provisioning of the CC IIF.

• Content of Communication Control Interface (CCCI) may dynamically provision the CC IIF.

• Internal interface INI1 carries provisioning information from LIAF to the Internal Intercept Functions (IIF).

• Internal interface INI2 carries Intercept Related Information (IRI) from IRI IIF to the MF.

• Internal interface INI3 carries Content of Communication (CC) information from CC IIF to the MF.

For an in-depth explanation of the functions and interface, refer to clause 4 of ETSI TR 102 528 [i.1].

The reference system model applied in the present document, as depicted in figure 2, provides a simplified model of a

technology independent, IP MultiMedia (MM) service platform, accessed by multiple different access networks. The

access networks may provide different forms of network access, using different technologies; they all have in common

that they provide IP connectivity among end-users and between end-users and the IP MM services provided by the IP

Access from the access networks into the IP Core network of the IP MM service provider is assumed to be protected by

some gateway device (e.g. a session border controller, border gateway controller or a firewall/router combination).

The IP MM Service platform contains a signalling server that provides session initiation functionality (e.g. a SIP call

manager or an H.323 gatekeeper) among end-users and between end-users and communication services (e.g. unified

Network Layer interception requires a copy of all signalling information as well as call content exchanged in the

This can be achieved by means of span-ports in the layer 2 switching backbone or by means of passive splitters (either

copper or fibre) at strategic points in the SvP's core network. Either way, due to the bandwidth of copied network

traffic, some form of filtering will most likely be required (e.g. by means of a layer 3 switch).

Service Layer interception requires LI interfaces and functionality to be available in both the signalling server and the

Typically the IRI IIF in the signalling server is provisioned with the target ID. At detection of a session setup for a

target, the IRI IIF will provide the IRI for the intercepted session and may provide session information to be used for

ad-hoc provisioning of the gateway devices. In some implementations, the gateway devices are also provisioned with

the target ID beforehand and are capable of detecting sessions independent from the signalling server.

1) Annex B provides the functional description of the minimal set of information that is to be provided to Law

2) The present document supports the interception of communication services defined in the following

3) Any deviation from the supported IETF and ITU-T specifications identified in item 2, e.g. vendor specific

parameters, shall be agreed in advance between the Communications Service Provider (CSP) and Law

4) The present document specifies the handover of intercepted signalling containing all information required in

5) IRI that is not part of intercepted signalling shall also be delivered. The format of such information on the

6) As a national option, mapping of the IRI information onto specific messages at the handover interface may be

The target identity is not a network layer or transport layer address. The target identity shall be an address type that

uniquely identifies the target in the CSP's network and by means of which sessions among users can be established,

The target identity is not a network layer or transport layer address. The target identity shall be an address type that

uniquely identifies the target in the CSP's network and by means of which sessions among users can be established,

SIP messaging IETF RFC 3261 [4] is reported as Intercept Related Information (IRI) for the interception of multi-media

service. All SIP messages executed on behalf of a target subscriber are subject to interception at the IRI Internal