NGN Work in ITU-T SG Yukio Hiramatsu Chairman of ITU-T SG11 1GSC-9, Seoul SOURCE:ITU-T TITLE:NGN Work in ITU-T SG11 AGENDA ITEM:5.0 CONTACT:Yukio Hiramatsu, Tel , Fax GSC9/GTSC_005

GSC-9, Seoul 2 Outline Major achievements during the current study period NGN activities in SG11 New Questions of SG11 for the next study period Work programme for NGN signalling requirements and protocols Draft Technical Reports on NGN Draft Technical Report on IP QoS Possible work on security

GSC-9, Seoul 3 Major achievements during the current study period IN work completed with approval of CS4 (Interworking with IP) (Q.124x-series) BICC CS2 (support of IP bearer) approved. BICC CS3 (further enhancement) progressed. (Q.1902-series, etc.) Support of International Emergency Preferential Service (IEPS) step1 approved. (Amendments to the existing ISDN, B-ISDN, SS7 and BICC protocols) Interworking between SIP – BICC/ISUP CS1 approved. (Q ) ATM over MPLS signalling progressed. (Amd Q.2920) Interworking between AAL2 signalling CS3 and IP control signalling progressed. (Q.263x-series) NGN related protocol work has been started.

GSC-9, Seoul 4 NGN activities in SG11 Two brainstorming sessions (Feb 2002 and Nov 2002 SG11). Initial idea for Draft 3 new Questions (Nov.2002 SG11). TRQs identified at the NCAP Rapporteurs meeting in Paris (April 2003) Draft 3 new Questions developed (Sep 2003 SG11). Work programme updated (March 2004 SG11). Set of new Questions for the next study period (March 2004). Existing Questions have been studying NGN related issues. –Q.1/11 (Requirements for IP and IN based services)  Draft TRQs. –Q.4/11 (API requirements)  Q.supp.40, 48 –Q.7/11 (IP telephony requirements)  Q.supp.49 (TRQ.2840) –Q.8/11 (QoS requirements)  Draft TRQ.

GSC-9, Seoul 5 Draft new Questions QTitle AA Network control functional architectures in emerging NGN environment BB Application control and signalling requirements and protocols CC Session control and signalling requirements and protocols DD Bearer control and signalling requirements and protocols EE Resource control and signalling requirements and protocols FF Assistance in preparation of handbooks for the deployment of packet based networks GG Control architecture, requirements and protocols to support user nomadicity and mobility in NGN environments

GSC-9, Seoul 6 Work programme for NGN ReferenceTitle TRQ.NCAP1 High level functional requirements for Packet-based network control architecture Q.NGN-NCANetwork control architecture TRQ.NCAP2Gate control protocol requirements TRQ.NCAPXSession control protocol requirements TRQ.NGN- STM Service Triggering Mechanisms in SIP environments

GSC-9, Seoul 7 TRQ.NCAP1 Core Network Access Network Customer Premises Network User Scope of NGN CATV network, ADSL/VDSL, fiber network, RITL (Radio in the loop), satellite and wireless network. Telecommunication network, PSTN, N-ISDN, B-ISDN provided by carriers. CPN comprising access unit, TV, PC, phone, wireless phone

GSC-9, Seoul 8 High level functional requirements Extract from TRQ.NCAP1: Addressing, Naming and Directory Services features User Profile Management Terminal Management Handling of Various Communication Patterns Mobility Management and Nomadism Multi-level Quality of Service Support Security Network Integrity Service Creation Failure Avoidance and Recovery Including from Congestion and Failure (Network Reliability) Public Safety (ETS/TDR) OA&M Related Functions (Usage Control & Management) Content Delivery Optimisation

GSC-9, Seoul 9 Q.NGN-NCA Description of various service control architecture options in the context of a SIP-based Next Generation Network 2 scenarios for SIP server with abstract call state machine and trigger processing (INAP based and OSA/Parlay based) 4 scenarios for SIP server with trigger processing and without abstract call state machine (INAP based, OSA/Parlay based, full SIP and hybrid) Scenario for SIP server without trigger processing nor abstract call state machine

GSC-9, Seoul 10 Some scenarios in Q.NGN-NCA SIP signalling entity Abstract Call State Machine CCFCCF SIP Service access manager SSFSSF Service Execution Environment Service Logic Program SCFSCF INAP SIP signalling entity Service Access Manager SIP signalling entity Service Execution Environment Service Logic Program SIP ASAS Full SIP SIP-IN direct access

GSC-9, Seoul 11 Signalling requirements for gate control interfaces (TRQ.ncap2) IP Core Network IP Access Network GW IP Access Network Session control signalling Gate controller Gate controller Session control signalling Session control signalling

GSC-9, Seoul 12 Signalling requirements for NGN session control (TRQ.ncapx) Bearer Level ACSFSCSF ACSF UNI NNI NGN-SCF These may be collocated in a single physical entity. Access Domain Core Domain ACSF: NGN-SCF: Access server function NGN session control protocol SCSF: Service call server function

GSC-9, Seoul 13 Work on IP QoS QoS is one of the most important features in NGN signalling. Draft TRQ.IPQOS.SIG.CS1 is under development in SG11. Scope expanded to include both “On-path” and “Off-path”, and to include various underlying technologies other than MPLS. Mr. Wei Feng (Huawei Technologies, China) has been nominated as Rapporteur on Q.8/11 dealing with QoS signalling in this study period. Interim Rapporteur meeting has been scheduled in July (in Shenzhen) with kind invitation by China members.

GSC-9, Seoul 14 Possible work on security Requirements for secured communication interface between PSTN and VoIP networks Analysis and examination of protocols and system interaction such as, but not limited to: SignTran, SS7, IPSec, H.248/Megaco, and SIP. The end result may be enhanced protocol specifications with additional security measures as well as raising awareness of industry best practices. Draft Recommendation X Security Architecture for Systems Providing End-to-End Communication be used as a sample tool for protocol security evaluation

GSC-9, Seoul 15 Security requirements for NGN PSTN Internet NGN ISDN Private Networks Trusted Networks Secure operating concept Untrusted Networks Secure interworking