FORUM ON NEXT GENERATION STANDARDIZATION
(Colombo, Sri Lanka, 7-10 April 2009)
Developing Physical Architecture of
NGN- a methodology
R. K. Siddhartha
Director,
Dept. of Telecommunications, INDIA
Colombo, Sri Lanka, 7-10 April 2009
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
Colombo, Sri Lanka, 7-10 April 2009
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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
Colombo, Sri Lanka, 7-10 April 2009
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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
recommendations in light of interoperability
Colombo, Sri Lanka, 7-10 April 2009
ITU
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Paradigm Shift !
ITU Mark
Colombo, Sri Lanka, 7-10 April 2009
Equipment testing
Physical Entity
Resolution
76
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Functional Architecture
Colombo, Sri Lanka, 7-10 April 2009
[Ref. ITU-T Y.2012]
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Need for Physical Architecture
Physical architecture will decrease interoperability
risk
Achieving seamless interoperability at the basiclevel is crucial
Functional architecture is for Implementers/
developers not for Operators & N/W designers
Modular Architecture-Implementation/ Deployment ease
-Vendor independence
-Optimize investment
Colombo, Sri Lanka, 7-10 April 2009
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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
Colombo, Sri Lanka, 7-10 April 2009
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) -----------------SIP
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
Colombo, Sri Lanka, 7-10 April 2009
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Functional Entities-Physical Entities
S-1: Serving call
session control FE (SCSC-FE)
S-5: Service user
profile FE (SUP-FE)
S-6: Service
authentication &
authorisation FE (SAAFE)
S-13: Media resource
control FE (MRC-FE)
S-14: Media Resource
broker FE (MRB-FE)
Application support
functions and service
support functions
Colombo, Sri Lanka, 7-10 April 2009
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
I
To other
Physical Entities
Of NGN Network
IOPt
III
Home
Subscriber
Server
IOPt
II
Media
Server
Colombo, Sri Lanka, 7-10 April 2009
To other
Physical
Entities of NGN
network
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Interop Req. for
Application Server
Total of Three Interfaces
IOPt
for
Application
Server
Colombo, Sri Lanka, 7-10 April 2009
=
IOPt
I
+
IOPt
II
+
IOPt
III
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Vertical Cut
API
--PHY
IOPt
Colombo, Sri Lanka, 7-10 April 2009
Protocols
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Types of Application Server
SIP AS
Colombo, Sri Lanka, 7-10 April 2009
towards
network
Using OSA
towards
network
Using CAMEL
OSA-SCS
IM-SSF
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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
Colombo, Sri Lanka, 7-10 April 2009
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Proposed Structure
Y.phy_arch_ngn
Four tier document
Physical
Architecture
of NGN
Each element
defined for
Interoperability
Colombo, Sri Lanka, 7-10 April 2009
Each
Interface
with vertical
cut layers
Each protocol
dressed up for
Interoperability
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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
Colombo, Sri Lanka, 7-10 April 2009
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Thank You !
Colombo, Sri Lanka, 7-10 April 2009
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