FORUM ON NEXT GENERATION STANDARDIZATION
(Colombo, Sri Lanka, 7-10 April 2009)
An Implementable NGN Architecture, and
its Capabilities
Session Moderator
Ghassem Koleyni
Colombo, Sri Lanka, 7-10 April 2009
Presentations and presenters
Session 4P1: Technical challenges in building the
NGN - NTT’s activities (Mr. Tatsuro Murakami, NTT,
Japan)
Session 4 P2: Requirements and capabilities for an
evolving NGN infrastructure (Mr. Marco Carugi,
Nortel, France)
Session 4 P3: An implementable NGN architecture
and its capabilities (Mr. Tilak De Silva, Sri Lanka
Telecom, Sri Lanka)
Session 4 P4: Access networks for NGN
implementations (Mr. Bharat Bhatia, Motorola,
India)
Session 4 P5: Converged Service Network (Mr.
Mingdong Li, ZTE, China)
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Colombo, Sri Lanka, 7-10 April 2009
Session 4 objectives
Discussion on the standards-based,
implementable NGN architecture
considering
Overall functional architecture of an
implementable NGN architecture
Functional architecture for supporting mobility
and realization of FMC environments
Architectural view points of “Quality of Services”
and “Network Performance” to meet NGN service
requirements from users and providers
Relevance of IPV6 for NGN transportation
NGN Access Networks
Colombo, Sri Lanka, 7-10 April 2009
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Highlights and proposals from Presentation 1
Technical challenges in building the NGN - NTT’s
activities
NTT has been experimentally investigating
VoIP using SIP for a long time.
Selected SIP to promote broadband
services.
Mandated to have low interconnection
charge LLU (Local Loop Unbundling)
Selected overlay to create a new service
structure and increase ARPU
NTT believes that NGN brings both Network
Innovation and service innovation.
Phasing out PSTN after 2010
Colombo, Sri Lanka, 7-10 April 2009
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Highlights and proposals from Presentation 2
Requirements and capabilities for an evolving NGN
infrastructure
IMS as central component in NGN
Key architectural challenges
Application-driven QoS
Mobility
Scalability
Mobility: a fundamental enabler of NGN
The multiple dimensions of convergence
Convergence of services, service platform,
networks, devices, management
Interoperable Identity Management
solutions are required
Connectivity-oriented vs Service-oriented
Interconnect
Both will co-exist, addressing different markets5
Colombo, Sri Lanka, 7-10 April 2009
Highlights and proposals from Presentation 3
An implementable NGN architecture and its
capabilities
Today’s network vertically integrated:
TDM Tx Back Bone (PSTN / ISDN, TDM Data network, CDMA
Network), IP / MPLS Back Bone, Metro Ethernet Network
Future network (i.e. NGN)
IP / MPLS Back Bone (NGN /IMS), TDM Tx Network (CDMA
Network)
Reasons for migration
End of life cycle, end of signaling support for R2, customer
demand for new features
Why going to NGN?
High system capabilities (Call handling, subscriber capacity,
traffic handling, etc…..)
Availability of new services. (Unified messaging, IP
Centrex/Hosted PBX, etc…)
More cost effective (i.e. Less CAPEX)
Step-by-step approach to ALL IP & FMC
TDM → ALL IP; ALL IP + Voice (soft switch); ALL IP + Multimedia
(IMS); ALL IP + FMC
Colombo, Sri Lanka, 7-10 April 2009
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Highlights and proposals from Presentation 4
Access networks for NGN implementations
Today: Access Network  Device  Service 
Application
Tomorrow: The NGN access technologies Providing
all IP transport
India is going wireless with subscribers increasing
at the rate of 10-15 Million per month
WiMAX & LTE Makes On-Demand Possible
WiMAX & LTE provide Faster, more responsive,
lower cost, added capacity, flexible and global
accessibility
WiMAX & LTE are Accelerating the delivery of
media experiences (Broadband everywhere,
Optimized networks, Content to the consumer)
Colombo, Sri Lanka, 7-10 April 2009
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Highlights and proposals from Presentation 5
Converged Service Network
Current situation of service ecosystem
Integration of the value chain
Decrease of revenue from consumers and enterprises
High CAPEX/OPEX
Issues related to charging
Trends in service evolution
Mobility across fixed and mobile networks
Convergence (Terminal, network, service, resource aggregation)
UGC and UGS
Next generation service creation environment
Key issues
Identity Management (Global ID)
Service, Capability, Resource Addressing
Open service framework
Intelligent Policy decision and network adaption
Data mining
Colombo, Sri Lanka, 7-10 April 2009
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Conclusions / Recommendations
Majority of current networks are vertically integrated.
This needs to be changed.
NTT has decided to phase out PSTN by 2010 and
moving to NGN
Application-driven QoS , mobility and scalability are
major challenges which need attention in evolving the
NGN
Convergence is needed for services, service platforms,
networks, devices and management services
WiMAX & LTE provide Faster, more responsive, lower
cost, added capacity, flexible and global accessibility
Some key issues for convergence service framework
need to be addressed in standardization
Colombo, Sri Lanka, 7-10 April 2009
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