Information Document 20-E

1
Information Document 20-E

• ITU-T Study Group 2
• March 2003
• QUESTION ALL
• SOURCE TSB
• TITLE NGN activities in ITU-T (by Y-H. Choe,
  Engineer, ITU-T SG4)

2
CONTENTS

• NGN activities
• NGN project plan
• NGN Aspects
• Total solution in ITU-T
• Conclusions

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NGN Initial Considerations

• NGN difficult to define in terms of
• specific technologies, specific architecture,
  Topology
• Identify high-level paradigms
• Separation of concerns, services from networks,
  Service Platform approach
• Identify emerging NGN-generic issues
• Architectural principles, OSI model relevance
• Need for NGN models to show separation of
  concerns via functional architectures
• Access/Core Separation
• Competitive Access to Services
• Access Network to include switching/routing
• Multiple transport technologies, Ethernet, ATM,
  IP, MPLS in various combinations
• Global Roaming (fixed and wireless networks)

4
NGN Service concept
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NGN Backbone N.K. technology
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ITU-T NGN activities

• SG2 (Operational aspects of service provision,
  networks and performance, including numbering,
  naming, and addressing)
• SG 4 (Network Management including TMN)
• SG 11 (Signaling requirements and protocols)
• SG 12 (End-to-end transmission performance of
  networks and terminals, QoS)
• SG 13 (Multi-protocol and IP-based networks and
  their internetworking)
• SG 15 (Optical and other transport networks)
• SG16 (Multimedia services, systems and terminals)
• SG 17 (Data Networks and Telecommunication
  Software)
• SSG ("IMT-2000 and Beyond and for mobility)

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NGN project plan

• The concept of a NGN has been introduced to take
  account the new situation in telecoms,
  characterized by a lot of factors
• it aims at open competition between operators due
  to the total deregulation of markets,
• explosion of digital traffic, e.g. due to the
  increasing use of internet, increasing demand
  from users for new multimedia services,
• increasing demand from users for a general
  mobility, etc..
• major goal is to facilitate convergence of
  networks and services.

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Basic characteristics of NGN

• Packet-based transfer,
• Separation of control functions
• Decoupling of service provision
• Support for a wide range of services
• Broadband capabilities
• Interworking with legacy networks
• Generalized mobility
• Unfettered access

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ITU-T Study areas on NGN

• General framework models
• Functional architecture models
• End-to-end Quality of Service (QoS)
• Service platforms (APIs)
• Network management
• Security
• Mobility

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General framework models

• General architectural principles
• This will provide a basis for NGN.
• The technical objective will be to develop a
  functional methodology and general model
• Functional architecture methodology model
• will provide guidelines on how to define a
  functional architecture for NGN

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Functional architecture models

• Use of generic RM techniques, Definition of
  interworking functions,
• Determination of how end-to-end service, call
  control and user mobility can be supported across
  heterogeneous networks,
• Definition of functionality of NGN-aware
  terminals,
• In terms of software upgrade mechanisms
• Redundancy and evolution of cost-reduced
  terminals
• Version negotiation and management

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Overall functional architecture model for NGN I

• .

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End-to-end Quality of Service (QoS)

• To handle both the way in which different end
  system can reach agreement
• on the end-to-end QoS for a call
• how the parameters set with this upper layer
  protocol can be used to control the lower layer
• transport and access level QoS mechanisms.
• For the issue of upper layer QoS control
• a distinction can be made between telephony? the
  wider topic of QoS for multimedia
• Likewise the control of lower layer QoS
  mechanisms is best divided into two topics
• vertical protocol linking the upper and lower
  layer QoS mechanisms (diffserv, etc)
• lower layer horizontal mechanism to link the
  lower layer QoS control between different domains
  and networks.

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Control Mechanism for QoS

• DWDM based NGN QoS provision

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Service platforms(APIs)

• NGN work on service platforms(API) should
  concentrate on
• Definition of service control architectures
  covering both OSA APIs and proxy aspects
• Enhancement of mechanisms to support provision of
  services across multiple networks covering both
  service roaming and interconnectivity of
  services
• Development of mechanisms to support user
  presence and user control of service
  customisation and profiles
• Impact of user mobility on service platforms.

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Network management

• Enhancement core network management
  architecture
• definition of basic network management services
  and interfaces
• Development common TMN working methods
• TMN to TMN interoperation using X-interface
• Information models for Optical Transport Network
  (OTN) management for NGN
• Inclusion and application of new architectural
  concepts and new technologies such as tML.

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MPLS Gateway Networking Solution implicat.s

• .

Multiservice Access Networks
Multiservice Access Networks
Core Network
MPLS Gateway
MPLS Gateway
ATM
ATM
FR
FR
CR-LDP/RSVP-TE
L2 Access Networks
L2 Access Networks
PNNI
PNNI
Ethernet
Ethernet
MPLS Core
IP-based Networks
IP Routing
IP Routing

• L3 VPN and other IP services

• L3 VPN and other IP services

IP-based Networks
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OAM Fault Management
I.610
Y.1711
Y.iw
IWF
IWF
ATM Network A
ATM Network B
Q3, M3
?
OSF/TMN
SNMP
Possible trouble location
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Security

• Key Production
• Key Management
• Authentication
• Need to further develop authentication
• Global certification on security
  products/solutions
• provision of support for the transition from a
  traditional network environment to IP-based
  networks

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Mobility

• NGN wireless network and terminal
  configurability, including the adaptation of
  resource allocation,
• Integration of fixed/mobile/broadcasting networks
  and rules for distribution and decentralized
  control of functional entities,
• Protocols that permit the network to adapt
  dynamically to changing channel
  conditions/Hand-over
• Global Roaming,
• Congestion-control algorithms,

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Total Solution in ITU-T

• Perfect Environment and Universal Functionality
• Optical and Transport Network
• Security
• QoS, Data network and Telecommunication Software
• Network Management
• Signaling and protocols
• Mobility
• Language and Tools
• Multi protocol and IP-based network
• Operational aspects, Service provision and
  Performance
• Electro-magnetic environment
• Multimedia

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CONCLUSIONS

• NGN is the most expected near future network
• First Recommendation is expected 2004
• Will combine Fixed network and Wireless network
• Makes come true to Mobile computing Environment
• ITU-T is the most perfect org. to NGN
• Bring your business/requirements and make it
  Universal Recommendation
• Please visit http//www.itu.int