What is NGN? - Sharifce.sharif.edu/courses/90-91/2/ce873-1/resources/root...What is NGN? The network...

What is NGN?

Hamid R. Rabiee

Spring 2012

Digital Media Lab - Sharif University of Technology2

Outlines

Next Generation Network (NGN)

Definition

Applications

Requirements

Network Architecture

QoS

Issues

What is NGN?

The network of 10 years from now won’t be the network of today.

Our goal for this session is to consider some ideas which may influence

what the Internet of the future will be.

ITU-T SERIES Y: GLOBAL INFORMATION INFRUSTRUCTURE,

INTERNET PROTOCOL ASPECTS AND NEXT GENERATION

NETWORKS

Y.2001 (12/2004): General overview of NGN

Y.2011 (10/2004): General principles and general reference model for NGN


NGN Definitions

NGN Definition (Y.2001): 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

Practical description (ETSI): the convergence of the public switched

telephone network, the voice network, the wireless network (Wi-Fi,

WiMAX, GSM,..) and the data network

IP based packet switched network that provides a single network

capable of carrying any and all services


NGN Concepts

A multi-service network able to support voice, data and video

A network with a control plane (signaling, control) separated from the

transport/switching plane

A network with open interfaces between transport, control and

applications

A network using packet mode technology to transport of all kind of

information

A network with guaranteed QoS for different traffic types and SLAs

(SLA refers to service-level agreement)


Why NGN?

Flexibility for service building and offering

Expectation of cost reductions by sharing infrastructure

and systems

Simplification in

(Operation and Manipulation)

lowering OPEX.

Use of open interfaces leads for:

quick deployment of services and applications

new services (third parties)


Existing Telecommunications

Benefits

Worked well for stand-alone systems

Challenges

Many networks= high operational and interworking costs

Slow to introduce new services

Users require different devices for different services

Difficult to integrate new services or technologies


Emerging Telecommunications

Benefits

Rapid service deployment= new service revenues

Allowed continued growth of network

Flexible architecture for future growth and new technologies

Allows for competition at individual layers

Challenges

Legacy policy frameworks are challenged by the emerging telecommunications

model throughout the world


Drivers and motivation for NGN deployment

External drivers and internal motivation put pressure on operators’

NGN deployments


develop new services easier

and faster

enhance flexibility

reduce operational

expenditures

replace of old platforms at

their end of lifecycle

massive growth of data

traffic

flat growth of voice market

massive access competition

maturity of IP technology

open standards and

architectures

Deployment of Next Generation Network

Operators’ MotivationDrivers

NGN Applications

www access (browsing, information, e-commerce…)

VoIP

Video calling

Video on Demand (VoD)

Broadcast television (IPTV, unicast, multicast)

Multimedia Messaging

Games

…


NGN Applications


NGN Requirements

Business Continuity required to maintain ongoing dominant services

and customers that require carrier-grade service

Flexibility to incorporate existing new services and react quickly to the

ones that appear on real time (main advantage of IP mode)

Profitability to allow feasible return on investments and in the best

practices market values

Privacy and security to ensure


NGN Requirements

Survivability to allow service assurance in case of failures and external

unexpected events

Quality of Service to guarantee the Service Level Agreements for

different traffic mixes, conditions and overload.

Interoperability across networks to allow to carry end to end services

for flows in different network domains


Basic Concepts of NGN

A Next Generation Network can be defined by six key criteria.


NGN

concept

integration of

existing

infrastructure

packet-

oriented

networksupport

broad

variety of

services

openness

and

flexibility

regarding

new

services

separation

into different

layers using

open

interfaces

application

focused -

access

independent

One schematic view of NGN


Main idea!


NGN Layers


NGN layers and functions

Application layer enables the provisioning of services and provides the

control and logic for the execution of services

Control layer controls the elements of the network, establishes and

tears down media connections

Access Independent layer is responsible for the transport of media and

signaling messages

Access Dependent layer connects customer networks or terminals with

the components of the NGN network and aggregate the dedicated

traffic type

Management layer covers network management ensuring service

fulfillment, service assurance and billing


Customer & Operator benefits

Customer benefits

device independence

access independence

service variety

enhanced usability

Operator/ Provider benefits

new revenue potential

improves time-to-market

easy integration of 3rd party services

one platform for voice, data and multimedia


Network Architecture


Areas of interest for NGN standards activity

International Telecommunications Union (ITU-T)

Telecommunication Standardization Advisory Group (TSAG)

Study Groups (SG13 lead SG for NGN)

NGN Global Standards Initiative (NGN-GSI), since Jan 2006

European Telecommunications Standards Institute (ETSI)

TISPAN, 3GPP / IMS

Internet Engineering Task Force (IETF)

Protocols (IP, SIP, MGCP, ENUM, etc)

Global Standards Collaboration (GSC)

Asia-Pacific Economic Cooperation (APEC) Telecommunications and

Information Working Group APEC TEL


Defining Standards

Smaller industry for a have helped shape international standards.

IETF have developed many of the core NGN technologies (IP, MPLS, SIP, etc.)

3GPP integrated IP-based technologies into a building block of the NGN, IP

Multimedia Subsystem (IMS)

Release based (ETSI TISPAN r1, 3GPP r7, ITU NGN r1-3)

ITU involvement is necessary at the international level to define an

evolutionary framework to help solve interworking, mobility and service

definitions issues, but…

There could be more pro-active cooperation between the ‘telco’ and

internet stakeholders


IP Multimedia Subsystem (IMS)

What is the IP Multimedia Subsystem?

An architectural framework for delivering IP multimedia services in the

3GPP environment

Part of the 3GPP (and 3GPP2: MMD) vision for evolving mobile networks

beyond GSM

Original formulation (Rel-5) an approach to deliver "Internet services" over

GPRS

Updated by 3GPP, 3GPP2, TISPAN through including support of other

access network technologies, e.g., Wireless LAN, CDMA2000, fixed line,

xDSL, etc.


IP Multimedia Subsystem (IMS)

IMS builds on IETF protocols

Based upon SIP, SDP, COPs and Diameter protocols

3GPP have enhanced these IETF protocols for mobility

IMS in short…

Open-system architecture that supports a range of I-based services over

the PS domain, employing both wireless and fixed access technologies


IMS Layers

IMS consists of three planes:

Application plane

Control plane (or core IMS): The IMS

control plane is used in the service

stratum

IP transport plane: Resource

control and admission based on the

negotiated QoS parameters are

mainly executed in the transport

stratum


NGN Competition Issues

Market power and network effects

Implications for existing and future customer access services

Any-to-any connectivity

Interconnect

Charging models for multiple providers in an E2E service

Pricing

Standards

Australian Competition and Consumer Commission (ACCC) has

begun canvassing some of the issues in discussion with stakeholders

and public


Longer-term NGN Issues

Implications for competition policy

Jurisdiction and extraterritoriality

Privacy and security

Digital rights management

Access and interoperability

Common standards

Consumer interests

International and domestic governance issues

Scope for industry self-regulation


Next Session

QoS Control Mechanisms

32Digital Media Lab - Sharif University of Technology

What is NGN? - Sharifce.sharif.edu/courses/90-91/2/ce873-1/resources/root...What is NGN? The network...

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