NGN Work in ITU-T SG11

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NGN Work in ITU-T SG11
GSC9/GTSC_005
SOURCE ITU-T
TITLE NGN Work in ITU-T SG11
AGENDA ITEM 5.0
CONTACT Yukio Hiramatsu, hiramatsu.yukio_at_lab.ntt.co.jp, Tel. [phone], Fax. [phone]

• 2004.5.11
• Yukio Hiramatsu
• Chairman of ITU-T SG11

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GSC-9, Seoul
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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

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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.

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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.

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Draft new Questions
Q Title
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
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Work programme for NGN
Reference Title
TRQ.NCAP1 High level functional requirements for Packet-based network control architecture
Q.NGN-NCA Network control architecture
TRQ.NCAP2 Gate control protocol requirements
TRQ.NCAPX Session control protocol requirements
TRQ.NGN-STM Service Triggering Mechanisms in SIP environments
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TRQ.NCAP1
Scope of NGN
Access Network
Customer Premises Network
User
Core Network
Access Network
Customer Premises 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.
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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)
• OAM Related Functions (Usage Control
  Management)
• Content Delivery Optimisation

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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

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

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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

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Security requirements for NGN
Untrusted Networks
Trusted Networks
ISDN
Secure interworking
PSTN
Private Networks
Internet
Secure operating concept
NGN