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World Class Standards Summary of NGN LI requirements Fitting standards together Scott CADZOW.

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Presentation on theme: "World Class Standards Summary of NGN LI requirements Fitting standards together Scott CADZOW."— Presentation transcript:

1 World Class Standards Summary of NGN LI requirements Fitting standards together Scott CADZOW

2 World Class Standards 2 The goals for NGN LI standardisation  Conformance to International User Requirement  As annex to COM 96/C329/01: "European Union Council Resolution COM 96/C329/01 of 17 January 1995 on the Lawful Interception of Telecommunications"  As found in TS "Telecommunications security; Lawful Interception (LI); Requirements of Law Enforcement Agencies“  Compliance with objectives of ECN&S regulatory framework  The NGN consists of many ECN and many ECS with loose relationships  Clear identification of Points of Interception  What is available at different PoI  Correlation between different PoI  Prevention of duplication of invocation of interception at PoIs

3 World Class Standards Documents to integrate  TISPAN  TS , in draft for NGN-R2  3GPP SA3-LI  , stage 2 in draft for R8  , stage 3 in draft for R8  TC LI  TS , handover to IP networks  ES /TS , handover to Circuit Switched networks 3

4 World Class Standards Technologies supported by the NGN  Separation of ECN and ECS  ECS technologies:  IMS (care of 3GPP)  PES (ISDN/PSTN on soft-switches)  IPTV  Corporate services  ECN technologies:  ADSL  PLMN Radio (care of 3GPP)  LAN radio (mostly care of 3GPP)  PSTN/ISDN 4

5 World Class Standards Interception in the NGN - identity  ECS identity  MSISDN  E.164  SIP-url  Other …  ECN identity  IMSI  Chap credential and identity 5

6 World Class Standards Interception in the NGN - signalling  ECS  IMS (SIP) signalling REGISTER (equivalent to MAP, found at HLR/VLR like entities) INVITE, ACK, BYE, CANCEL, OPTIONS (found at CSCF entities)  PES/PSS ISDN emulation signalling found at Signalling gateways (H.248) SIGTRAN, SIP-I  ECN  Access signalling (no service), CHAP, PPP etc. 6

7 World Class Standards Interception in the NGN - content  ECS  No traffic content  Some extended signalling content in SDP/SIP  ECN  IP traffic content TCP, UDP, RTP  Non-IP traffic content 7

8 World Class Standards Problems in NGN, ECN&S interception  Correlation across ECN/ECS boundary  IMS into NASS via RACS (Gq’) for QoS transport control  Resource requests from ECS to ECN not personalised  Ownership break across ECN/ECS boundary (one CSP for each of ECN and ECS)  No correlation as there is no common visibility to CSP 8

9 World Class Standards IMS interception  IMS is an instance of ECS technology  Independent of ECN technologies  IMS is a platform  No services per-se  Expectation from NGN  Clear identification of PoI for various IMS capabilities  Common capability for all IMS implementations 9

10 World Class Standards Concerns to be addressed  Structure of IMS interception  One clause for any technology (IMS is an ECS technology and any ECN technology can/should be able to access it)  Reference from TS to  Annex showing normative application from TS to  Timetable for IMS interception  Required for NGN-R2  TS to be finalised very soon and needs to have IMS interception included Ideally by reference to and If not by reference then in a transferable way (i.e. defined in TISPAN for movement to and when appropriate) 10


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