Developing Physical Architecture of NGN- a methodology

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Developing Physical Architecture of NGN- a
methodology
FORUM ON NEXT GENERATION STANDARDIZATION
(Colombo, Sri Lanka, 7-10 April 2009)

• R. K. Siddhartha
• Director,
• Dept. of Telecommunications, INDIA

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NGN -Interoperability is crucial

• A packet based network able to provide
  telecommunication services and able to make use
  of multiple broadband, QoS-enabled transport
  technologies and in which service related
  functions are independent from underlying
  transport related technologies. It enables
  unfettered access for users to networks and to
  competing service providers and/or services of
  their choice. It supports generalized mobility
  which will allow consistent and ubiquitous
  provision of services to users
• -Ref.
  ITU-T Y.2001

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ITU mark program

• a Catalyst for Interoperability standards in ITU
  Recommendations - intrinsic interoperability in
  standards
• Can be feedback mechanism for fixing up standards
  for including attributes of interoperability
• Boost to indigenization of the Telecom Equipments
• Enhance Knowledge creation process
• Increase Competitiveness

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Resolution 76

• that providing for interoperability should be the
  ultimate aim of future ITU-T Recommendations
• Considered the difficulties of equipment level
  interoperability
• Noted need to assist developing countries in
  facilitating solutions which will exhibit
  interoperability and reduce the cost of systems
  and equipment procurement by operators
• Instructed Study Groups to identify ITU
  recommendations in light of interoperability

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Paradigm Shift !

Physical Entity
Resolution 76
ITU Mark
Equipment testing
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Functional Architecture
Ref. ITU-T Y.2012
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Need for Physical Architecture

• Physical architecture will decrease
  interoperability risk
• Achieving seamless interoperability at the
  basic-level is crucial
• Functional architecture is for Implementers/
  developers not for Operators N/W designers
• Modular Architecture-
• -Implementation/ Deployment ease
• -Vendor independence
• -Optimize investment

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Functional Entities
Application support functions service
support function
S-6 S Authentication authorisation FE
S-5 Service user profile FE
S-14 Media Resource broker FE
S-1 Serving call Session control FE
S-13 Media Resource Control FE
Ref. ITU-T Y.2012
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Reference Points Interfaces

• Ref. points (Service control functions)
• S-1 (S-CSC-FE) - S-13 (MRC-FE) -----------------SI
  P
• S-1 (S-CSC-FE) - S-5(SUP-FE), S-6(SAA-FE)----
  Diameter
• Reference points (ASF/SSF)
• S-1 (S-CSC-FE) - ASF/SSF---------SIP
• S-5 (SUP-FE) - ASF/SSF------------Diameter
• S-6 (SAA-FE) ASF/SSF-----------Diameter
• S-13 (MRC-FE) ASF/SSF---------SIP, HTTP,
  VoiceXML,
• 
  MSCML
• S-14 (MRB-FE) ASF/SSF---------SIP, HTTP, SOAP

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Functional Entities-Physical Entities

• S-1 Serving call session control FE (S-CSC-FE)
• S-5 Service user profile FE (SUP-FE)
• S-6 Service authentication authorisation FE
  (SAA-FE)
• S-13 Media resource control FE (MRC-FE)
• S-14 Media Resource broker FE (MRB-FE)
• Application support functions and service support
  functions

• Proxy Registrar Server
• Home Subscriber Server (HSS)
• Media Server
• Application Server

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A Section of Possible Physical Architecture of
NGN for Interop
Proxy Registrar Server

Application Server
IOPt III
Home Subscriber Server
IOPt I
IOPt II
Media Server
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Interop Req. for Application Server

• Total of Three Interfaces

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Vertical Cut

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Types of Application Server

towards network Using OSA
towards network Using CAMEL
OSA-SCS
IM-SSF
SIP AS
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Y.phy_arch_ngn

• Architectural realizations and open interfaces
  in NGN
• Recommendation for Interoperability
• Basic Physical architecture showing physical
  elements of NGN
• Open interfaces are spelled for each element

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Proposed Structure Y.phy_arch_ngn

• Four tier document

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ITU Mark Y.phy-arch-ngn

• Can be a Seed document for Interoperability
  Standards testing in NGN
• Target 50 of elements of NGN are standardized
  as physical entities it can help achieving
  objectives of NGN (Y. 2oo1)
• Digital Opportunity Index will be improved in
  developing countries

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Thank You !