What is NGN? - Sharifce.sharif.edu/courses/90-91/2/ce873-1/resources/root...What is NGN? The network...
Transcript of What is NGN? - Sharifce.sharif.edu/courses/90-91/2/ce873-1/resources/root...What is NGN? The network...
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What is NGN?
Hamid R. Rabiee
Spring 2012
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Digital Media Lab - Sharif University of Technology2
Outlines
Next Generation Network (NGN)
Definition
Applications
Requirements
Network Architecture
QoS
Issues
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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
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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
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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)
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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)
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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
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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
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Drivers and motivation for NGN deployment
External drivers and internal motivation put pressure on operators’
NGN deployments
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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
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NGN Applications
www access (browsing, information, e-commerce…)
VoIP
Video calling
Video on Demand (VoD)
Broadcast television (IPTV, unicast, multicast)
Multimedia Messaging
Games
…
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NGN Applications
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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
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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
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Basic Concepts of NGN
A Next Generation Network can be defined by six key criteria.
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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
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One schematic view of NGN
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Main idea!
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NGN Layers
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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
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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
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Network Architecture
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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
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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
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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.
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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
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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
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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
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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
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Next Session
QoS Control Mechanisms
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