1、 ETSI TS 101 909-20-2 V1.2.1 (2006-03)Technical Specification Digital Broadband Cable Access to the Public Telecommunications Network;IP Multimedia Time Critical Services;Part 20: Lawful Interception;Sub-part 2: Streamed multimedia servicesfloppy3 ETSI ETSI TS 101 909-20-2 V1.2.1 (2006-03) 2 Referen
2、ce RTS/AT-020050 Keywords IPCable, Lawful Interception ETSI 650 Route des Lucioles F-06921 Sophia Antipolis Cedex - FRANCE Tel.: +33 4 92 94 42 00 Fax: +33 4 93 65 47 16 Siret N 348 623 562 00017 - NAF 742 C Association but non lucratif enregistre la Sous-Prfecture de Grasse (06) N 7803/88 Important
3、 notice Individual copies of the present document can be downloaded from: http:/www.etsi.org The present document may be made available in more than one electronic version or in print. In any case of existing or perceived difference in contents between such versions, the reference version is the Por
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5、on on the current status of this and other ETSI documents is available at http:/portal.etsi.org/tb/status/status.asp If you find errors in the present document, please send your comment to one of the following services: http:/portal.etsi.org/chaircor/ETSI_support.asp Copyright Notification No part m
6、ay be reproduced except as authorized by written permission. The copyright and the foregoing restriction extend to reproduction in all media. European Telecommunications Standards Institute 2006. All rights reserved. DECTTM, PLUGTESTSTM and UMTSTM are Trade Marks of ETSI registered for the benefit o
7、f its Members. TIPHONTMand the TIPHON logo are Trade Marks currently being registered by ETSI for the benefit of its Members. 3GPPTM is a Trade Mark of ETSI registered for the benefit of its Members and of the 3GPP Organizational Partners. ETSI ETSI TS 101 909-20-2 V1.2.1 (2006-03) 3 Contents Intell
8、ectual Property Rights6 Foreword.6 Introduction 6 1 Scope 7 2 References 8 3 Definitions and abbreviations.9 3.1 Definitions9 3.2 Abbreviations .12 4 Overview and analysis of IP multimedia Time Critical Services.13 4.1 Overview 13 4.2 Architecture (TS 101 909-2) 13 4.2.1 IPCablecom architecture.13 4
9、.2.2 Generic centralized architecture .14 4.2.3 Decentralized architecture (peer-to-peer) .15 4.2.4 Multimedia architecture in IPCablecom .15 4.2.5 AM - PS - CMTS policy architecture .17 4.2.6 Traffic control using gates 18 4.3 Multimedia service scenarios .19 4.3.1 Scenarios for QoS-based multimedi
10、a services19 4.3.1.1 Support of client type 1 .19 4.3.1.2 Support of client type 2 .20 4.3.1.3 Support of client type 3 .21 4.3.2 QoS-unaware multimedia communications scenarios 22 4.3.2.1 Centralized services 22 4.3.2.2 Peer-to-peer applications.23 5 LI architecture for IP multimedia Time Critical
11、Services 23 5.1 Overview 23 5.2 Description of functional elements.25 5.2.1 Intercept Related Information Interception Function (IRIIF) .25 5.2.2 Content of Communication Interception Function (CCIF) .25 5.2.3 Lawful Interception Mediation Function (LIMF).25 5.2.4 Lawful Intercept Administration Fun
12、ction (LIAF) .25 5.3 LI Architecture .26 5.3.1 LI in the multimedia architecture of J.17926 5.3.2 LI architecture for QoS unaware communication.27 6 Interception of user signalling28 6.1 Interception protocol at interface INI2 .28 6.1.1 Content of IRI Record.29 6.2 Signal sets and interception30 6.3
13、 Location of LI functions.30 6.4 Interception of specific signalling 33 6.4.1 IRI protocol service model .33 6.4.2 Target activity monitor .33 6.4.2.1 Data provision and encoding.34 6.4.2.1.1 Version 34 6.4.2.1.2 Lawful Interception (LI) instance identity.34 6.4.2.1.3 Timestamp .34 6.4.2.1.4 Target
14、location.34 6.4.2.1.5 Direction35 6.4.2.1.6 IRI transaction type .35 6.4.2.1.7 IRI transaction number 35 6.4.2.1.8 User signal.35 ETSI ETSI TS 101 909-20-2 V1.2.1 (2006-03) 4 6.4.2.1.9 Crypto check sum35 7 Interception of Content of Communication (CC).36 7.1 Internal delivery of Content of Communica
15、tion (CC) across interface INI336 7.1.1 General model.36 7.1.2 CC protocol service model .37 7.1.2.1 T_TRAFFIC_req_ind37 7.1.2.2 CT_TRAFFIC_req_ind.38 7.1.2.3 Data provision and encoding.38 7.1.2.3.1 Version 38 7.1.2.3.2 Lawful Interception instance identity 38 7.1.2.3.3 Correspondent count38 7.1.2.
16、3.4 IRI transaction number 38 7.1.2.3.5 Traffic packet 38 7.1.2.3.6 Crypto check sum39 8 Security.39 8.1 General .39 8.2 Security requirements.39 8.3 Interface INI1 .39 8.4 Interfaces to the DF 40 8.4.1 Security services .40 8.4.1.1 Interface AM-DF.40 8.4.1.2 Interface PS-DF.40 8.4.1.3 Interface CMT
17、S-DF 41 8.4.2 Security mechanisms 41 8.5 End-to-End security41 8.6 Use of IPSec to secure intercepted content (INI3) .41 Annex A (normative): ASN.1 Module 42 Annex B (informative): Information flows on INI1 44 B.1 Activation of LI44 B.2 Modification of LI45 B.3 Deactivation of LI 46 B.4 Interrogatio
18、n of LI47 B.5 ASN.1 model of INI1 flows .48 B.6 Implementation example for INI1 using SNMPv3 MIBs 54 B.6.1 Introduction to SNMP 54 B.6.2 LI MIB description.54 B.6.3 Provisioning Intercepts through SNMPv355 B.6.3.1 Creation of an MD Entry 55 B.6.3.1.1 Use of “CreateAndWait“ Method56 B.6.3.1.2 Use of
19、“CreateAndGo“ Method. .56 B.6.3.2 Creation of a stream entry.56 B.6.3.2.1 Provision of generic stream.56 B.7 Implementation example for INI1 using COPS .57 B.7.1 COPS gate control object for LI.57 B.7.2 LI Requirements for the CMTS58 Annex C (informative): Handover of intercepted material 59 C.1 Ove
20、rview 59 C.2 Mapping to Handover Interface .59 Annex D (informative): SDL Model60 D.1 System model .60 ETSI ETSI TS 101 909-20-2 V1.2.1 (2006-03) 5 D.2 LI Block definition.62 D.3 Signal definitions63 D.4 Process models .63 D.4.1 IRIIF process model .64 D.4.2 CCIF process model .65 Annex E (informati
21、ve): Signalling message classification 66 E.1 SIP 66 E.1.1 Analysed services.66 E.1.2 Signal classification66 E.2 MGCP.67 E.2.1 Analysed services.67 E.2.2 Signal classification67 E.3 H.32368 E.3.1 Analysed services.68 E.3.2 Signal classification68 E.4 RTSP 69 E.4.1 Signal classification69 Annex F (i
22、nformative): Bibliography.70 History 71 ETSI ETSI TS 101 909-20-2 V1.2.1 (2006-03) 6 Intellectual Property Rights 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
23、 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 server (http:/weba
24、pp.etsi.org/IPR/home.asp). 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 server) which are, or may be, or may becom
25、e, essential to the present document. Foreword This Technical Specification (TS) has been produced by ETSI Technical Committee Access and Terminals (AT). The present document is part 20, sub-part 2, of a multi-part deliverable. Full details of the entire series can be found in part 1 1. Introduction
26、 The cable industry in Europe and across other global regions have already deployed broadband cable television Hybrid Fibre/Coaxial (HFC) data networks running the Cable Modem Protocol. The cable industry is in the rapid stages of deploying Internet Protocol (IP) Voice and other time critical multim
27、edia services over these broadband cable television networks. The cable industry has recognized the urgent need to develop ETSI Technical Specifications aimed at developing interoperable interface specifications and mechanisms for the delivery of end to end advanced real time IP multimedia time crit
28、ical services over bi-directional broadband cable networks. IPCablecom is a set of protocols and associated element functional requirements developed to deliver Quality of Service (QoS) enhanced secure IP multimedia time critical communications services using packetized data transmission technology
29、to a consumers home over the broadband cable television Hybrid Fibre/Coaxial (HFC) data network running the Cable Modem protocol. IPCablecom utilizes a network superstructure that overlays the two-way data-ready cable television network. While the initial service offerings in the IPCablecom product
30、line are anticipated to be Packet Voice, the long-term project vision encompasses packet video and a large family of other packet-based services. The cable industry is a global market and therefore the ETSI standards are developed to align with standards either already developed or under development
31、 in other regions. The ETSI Specifications are consistent with the CableLabs/ IPCablecom set of specifications as published by the SCTE. An agreement has been established between ETSI and SCTE in the US to ensure, where appropriate, that the release of IPCablecom and IPCablecom set of specifications
32、 are aligned and to avoid unnecessary duplication. The set of IPCablecom ETSI specifications also refers to ITU-SG9 draft and published recommendations relating to IP Cable Communication. The whole set of multi-part ETSI deliverables to which the present document belongs specify a Cable Communicatio
33、n Service for the delivery of IP Multimedia Time Critical Services over a HFC Broadband Cable Network to the consumers home cable telecom terminal. “IPCablecom“ also refers to the ETSI working group program that shall define and develop these ETSI deliverables. ETSI ETSI TS 101 909-20-2 V1.2.1 (2006
34、-03) 7 1 Scope The present set of documents specify IPCablecom, a set of protocols and associated element functional requirements. These have been developed to deliver Quality of Service (QoS), enhanced secure IP multimedia time critical communication services, using packetized data transmission tec
35、hnology to a consumers home over a cable television Hybrid Fibre/Coaxial (HFC) data network. NOTE 1: IPCablecom set of documents utilize a network superstructure that overlays the two-way data-ready cable television network, e.g. as specified within ES 201 488 6 and ES 200 800 7. While the initial s
36、ervice offerings in the IPCablecom product line are anticipated to be Packet Voice and Packet Video, the long-term project vision encompasses a large family of packet-based services. This may require in the future, not only careful maintenance control, but also an extension of the present set of doc
37、uments. NOTE 2: The present set of documents aims for global acceptance and applicability. It is therefore developed in alignment with standards either already existing or under development in other regions and in International Telecommunications Union (ITU). The present document of the above mentio
38、ned series of ETSI deliverables specifies the interception of those multi-media services carried over the network defined in the remainder of the above mentioned series of ETSI deliverables that do not fall into the interception domain covered by sub-part 1 of TS 101 909-20-1 5. The present document
39、 describes the implementation of a Lawful Interception (LI) interface in an IPCablecom system. It provides the requirements and specification of the interface within an IPCablecom system for the purpose of providing data to Law Enforcement Agencies (LEAs) in the area of (LI) of communications. The p
40、rovision of a (LI) interface for IPCablecom is a national option, however where it is provided it shall be provided as described in the present document. The structure of (LI) in telecommunications is in two parts: The internal interface of a network that is built using a particular technology; and,
41、 the external interface (known as the Handover Interface) that links the LEA to the network. Between these two parts may lie a mediation function to cater for national variances and delivery of the result of interception. The Handover Interface is specified in TS 102 232 11 and TS 102 234 10. In add
42、ition, the Handover Interface may be the subject of national regulation and therefore the mediation function may also be a matter of national regulation. The subject of the present document is the internal LI interface that lies between the IPCablecom infrastructure and the mediation function. The p
43、resent document describes the data content of information flows from the IPCablecom system to the mediation function. The present document is structured as follows: clause 4 describes the IPCablecom architecture and services to which LI applies; clause 5 presents architecture for LI in an IPCablecom
44、 system; clause 6 presents the data model and behaviour for interception of signalling; clause 7 presents the data model and behaviour for interception of the content of communication; NOTE 3: The content of communication in IPCablecom is an IP packet. clause 8 presents the security provisions for L
45、I; the annexes provide illustrations of the management of LI in an IPCablecom environment. The present document applies to IPCablecom services where access to the communication of IPCablecom users is available in a network, and where the services being intercepted do not include the PSTN/ISDN emulat
46、ion services whose interception is described in TS 101 909-20-1 5. ETSI ETSI TS 101 909-20-2 V1.2.1 (2006-03) 8 The present document does not describe the means of transporting data from the IPCablecom network to the LEA, but describes only the means of capturing and encoding the activities of a tar
47、get within the IPCablecom network and delivering this data to the mediation function. The present document does not define the operations or technical requirements of the Handover Interface that takes data from the mediation function to the LEMF. The present document does not define the operations o
48、r technical requirements of the Law Enforcement Monitoring Facility (LEMF). NOTE 4: No test point is provided in the present document to ensure conformance. 2 References The following documents contain provisions which, through reference in this text, constitute provisions of the present document. R
49、eferences are either specific (identified by date of publication and/or edition number or version number) or non-specific. For a specific reference, subsequent revisions do not apply. For a non-specific reference, the latest version applies. Referenced documents which are not found to be publicly available in the expected location might be found at http:/docbox.etsi.org/Reference. 1 ETSI TS 101 909-1: “Digital Broadband Cable Access to the Public Telecommunications Network; IP multimedia Time Critical Services; Part 1: General“. 2 ETSI TS
