NGN Work in ITU-T SG11

1. GSC9/GTSC_005 NGN Work in ITU-T SG11 2004.5.11 Yukio Hiramatsu Chairman of ITU-T SG11 GSC-9, Seoul 1

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.1912.5) • 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 GSC-9, Seoul

6. Work programme for NGN GSC-9, Seoul

7. TRQ.NCAP1 Scope of NGN Customer Premises Network Access Network User Core Network Customer Premises Network Access Network User CATV network, ADSL/VDSL, fiber network, RITL (Radio in the loop), satellite and wireless network. CPN comprising access unit, TV, PC, phone, wireless phone Telecommunication network, PSTN, N-ISDN, B-ISDN provided by carriers. 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 S C F Service Logic Program Service Logic Program A S Service Execution Environment Service Execution Environment SIP signalling entity INAP S S F SIP Service access manager SIP signalling entity C C F Abstract Call State Machine Service Access Manager SIP SIP SIP SIP SIP signalling entity SIP signalling entity Full SIP SIP-IN direct access GSC-9, Seoul

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

12. Signalling requirements for NGN session control (TRQ.ncapx) These may be collocated in a single physical entity. NNI ACSF SCSF SCSF ACSF UNI NGN-SCF UNI Bearer Level Access Domain Core Domain Access 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.805 - 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 Untrusted Networks Trusted Networks ISDN Secure interworking PSTN Private Networks Internet Secure operating concept NGN GSC-9, Seoul