Need of interoperability within an ngn an approach
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FORUM ON NEXT GENERATION STANDARDIZATION (Colombo, Sri Lanka, 7-10 April 2009). Need of Interoperability “within” an NGN – An approach. Rajeshwar Dayal, Director Dept. of Telecommunications, India. What interoperability means for :.

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Need of Interoperability “within” an NGN – An approach

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Need of interoperability within an ngn an approach

FORUM ON NEXT GENERATION STANDARDIZATION (Colombo, Sri Lanka, 7-10 April 2009)

Need of Interoperability “within” an NGN – An approach

Rajeshwar Dayal,

Director

Dept. of Telecommunications, India


What interoperability means for

What interoperability means for :

  • ITU – The ability of two or more systems or applications to exchange and mutually use the information that has been exchanged ( Y.101)

  • ETSI – Capability to provide successful communication between end users across a mixed environment of different domains, networks, facilities, equipments etc. ( TR 101 287)

    - where one component, from one manufacturer, can be replaced with another, and the basic operation of system remains unaffected. (TR 102 136 )

  • IETF –The ability of software and hardware on multiple machine from multiple vendors to communicate meaningfully. ( RFC 1983)


Context of interoperability

Context of interoperability

  • No common definition or context

  • Multiple definitions by same SDO

    • Network

    • System

    • Application

    • Component

    • Terminal/ CPE

    • Software & Hardware


Interoperability between networks and within a network

Interoperability –Between networks and within a network

Operator B

Operator A

Network B

Network A

SIP Application

Server

WEB

Portal

VOIP

Gateway

Router

Within a network there are

various network elements,

systems, equipments,

Components……


Network expansion case 1 same vendor

Network Expansion Case 1– Same vendor

SIP Application

Server

WEB

Portal

Expansion equipments

from Vendor A

Router

VOIP

Gateway

Interoperability

is ensured

Network from Vendor A

Smooth expansion


Network expansion case 2 different vendor

Network ExpansionCase 2 –Different vendor

SIP Application

Server

Expansion equipments

from

Vendor B & vendor C

WEB

Portal

Router

VOIP

Gateway

Interoperability

Missing

Network from Vendor A

Network Expansion ???


Need of interoperability within ngn

Need of interoperability ‘within’ NGN

  • More modularity in the network

    • Comfort of plug-and-play

    • More competition

  • Faster and smooth deployment

    • Eliminate locking up with vendor

  • Need of time

    • Scenario of convergence & merger

  • ITU-T

    • Objective of NGN (Y.2001)-Fair competition

    • Resolution 2- Mandate & responsibility of SG13


Current approach to achieve interoperability

Current approach to achieve Interoperability

  • Testing against Conformance and Interoperability Test Suits

  • Interop Events ..

    • Plugtests

    • Plugfest

    • Bake off


Why interop is not a natural outcome of conformance to standard

Why Interop. is not a natural outcome of conformance to standard ?

  • Misinterpretations : Ambiguity, Not complete ( Normal Expected behavior but what if unexpected happens)

  • Multiple options for implementation

  • Difficult to interpret

  • Flexibility - for consensus or … interests

  • Not comprehensive - cross references


What is specified by itu for ngn

What is specified by ITU for NGN

ANI

NNI

UNI

  • Functional architecture

    ( Y.2012)

For interworking and

interoperability at network boundary level.


What is specified for within ngn

What is specified for ‘within’ NGN ?

“Within” NGN

  • Y.2012

  • Functional

  • Architecture

  • Q.3030

  • Signalling

  • Architecture for

  • service control plane


What is required for interoperability within an ngn

What is required for interoperability ‘within’ an NGN?

  • Standards providing :

    • Architecture identifying interoperable Functional / Physical Entities and their open interfaces.

    • Requirements, spelt out unambiguously & comprehensively, for such open interfaces covering aspects such as its applicable stacks /layers, protocols & their profiles for interoperability, technology specific interfaces / protocols, etc.


From existing architecture to an architecture with open interfaces

From existing architecture to An architecture with open interfaces

SIP Application

Server

WEB

Portal

Router

VOIP

Gateway

Interoperability

Missing

Open interfaces

Multi-vendor equipments


Conclusion 1 2

Conclusion (1/2)

Steps to bring interoperability as natural outcome of conformance to standards-

  • Standards / Recommendations need to be categorized e.g. for ‘Protocol’, ‘Network’, ‘Equipment’, ‘Services’.

  • A template & checklist need to defined/ developed for each, to address interoperability.

    e.g. physical equipment aspect ( and not only functional aspects) in standards related to equipments.


Conclusion 2 2

Conclusion (2/2)

  • Mechanism need to be worked out for :

    • Testing of Standards - before final approval.

      - may be those required for developing

      interoperable equipments or services

      - testing infrastructure e.g. ITU-ZNIIS ITTC

    • Feedback - from developers, implementers, users, testing / certifying agencies, etc.

      e.g.Resolution-44, Forums of Interop Events

    • Synergy of related activities at ITU & SDOs. e.g. JCA-CIT, SG-17,SG-11, ITTC, Res. 44


Need of interoperability within an ngn an approach

Thank You


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