tổng quan mạng NGN overview

Transition to NGN: First wave• Growth of Internet and other IP-based networks with their requirements for bandwidth and capacity has driven rapid innovation in telecommunication access a

1 Next Generation Networks

1.2 Key drivers of NGN development

1.3 Evolution of networks’ architecture to NGN

1.3 Evolution of networks’ architecture to NGN

1.4 NGN architecture

1.5 Main NGN protocols and building blocks

1.1 Transition to NGN: First wave

• Growth of Internet and other IP-based networks with their

requirements for bandwidth and capacity has driven rapid

innovation in telecommunication access and transport networks Examples:

– leveraging copper wire “last-mile” networks through digital

subscriber line (“DSL”) technologies

– re-architecturing of cable networks to support IP services

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– re-architecturing of cable networks to support IP services

– advances in optical networking technologies (e.g PON)

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Convergence of Telephony World and Internet World

Transition to NGN: Second wave

• Ongoing trend towards integration & interoperability of

IP-based and PSTN network services and applications

• Emergence of differentiated Quality of Service IP-based services

• Managed end-to-end performance needed for new applications requiring real-time traffic (e.g., video, voice)

• New network management, QoS, traffic engineering, pricing & accounting models

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accounting models

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Transition to NGN: Third wave

• Evolution of current PSTN, mobile, wireless and

IP-based networks to unified Next Generation Networks

providing both Internet and carrier-grade telecommunications

networks and services offerings with QoS

• Transition to Third wave:

Ubiquitous & Pervasive Networks

– anybody, anytime, anywhere

• Global Information Infrastructure (GII) – ITU, 1995

• EII ETSI Project (1995)

• EII ETSI Project (1995)

• ETSI – 3GPP (1998)

• 3GPP activity (FMC and IMS development)

• TISPAN Project (ETSI, 2003)

TISPAN - Telecoms & Internet converged Services & Protocols for

Advanced Networks

• ITU NGN 2004 Project

• Y.1xx ITU-T – SG 13 “NGN – Architecture, Evolution and Convergence”

The Unified Network

The Vision

Voice Fix and Mobile

The Unified FR

IP ATM

The Unified Multi Service Network

The Unified Network The Data Migration

The Unified Multi Service Network

Pure technology/standardization matter:

How different data services can transport over a unique data backbone

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The Unified Network The Voice Migration

Voice

The Unified

Somewhat more complex

- From circuit switched to packet switched

- Voice switches need to disappear in the long term

FR

IP ATM

The Unified Multi Service Network

A new network concept supporting voice in

a packetized environment is required

The Next Generation Network

A new network concept supporting voice in

a packetized environment is required

The Next Generation Network

ITU-T definition of NGN (Y.2001, Feb 2004)

able to provide services including Telecommunications Services

transport technologies and in which service-related functions

are independent from underlying transport-related technologies

It offers unrestricted access by users to different service

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providers It supports generalized mobility which will allow

consistent and ubiquitous provision of services to users.”

One of the primary goals of NGN is to provide a common, unified, and flexible service architecture that can support multiple types of services over multiple types of transport networks

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NGN is the public packet-based network with the

following main features:

– Layered architecture

– Open interfaces between the layers and all other networks

– Seamless control of multiple transport technologies

– Centralized intelligence

NGN Characteristics

The NGN is characterized by the following fundamental aspects:

• Packet-based transfer in the core NGN network

• Support for a wide range of services, applications and mechanisms

(including real time/ streaming/ non-real time services and multi-media)

• Independence of service-related functions from underlying transport

• Broadband capabilities with required end-to-end QoS

• Interworking with legacy networks via open interfaces

• Generalized mobility

• Unrestricted access by users to different service providers

• Services convergence between Fixed/Mobile

• Compliance with all Regulatory requirements, for example concerning

emergency communications, security/privacy, etc.

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1.2 Key drivers of NGN development

• Short Term objective :

Create new revenue possibilities

– Removal of boundaries between voice and data opens the way to new kind of services

– Can be realized relatively quickly with limited

investments

• Long Term objective :

Realize cost savings

– Simpler network

– More efficient network

– Cheaper network components

– Full benefit only realized when all separate networks

Driven by

Cost Reduction

Possibilities

Driven by Revenue Increase Possibilities

Key drivers: technologies and services

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• User demands

– easiness to use and personalization of services

– seamless service regardless of the access technology

– a “beautiful garden” offering valuable services with security– openness to the entire Community

NGN key drivers:

From IP Technology to User and Application

Centric

– openness to the entire Community

• Operator challenges need to be addressed

– need to manage complexity to deliver simplicity

– platform for convergence of services and technologies

– support of different device and access technologies

– revenue opportunities by mobility and nomadicity, worldwide use

– support migration from existing technologies

NGN services

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NGN Services

• Voice Telephony – NGN will likely need to support various existing voice telephony services (e.g., Call Waiting, Call Forwarding, 3-Way Calling, various IN features,

various Centrex features and etc.).

• Data Services – Allows for the real-time establishment of connectivity between

endpoints, along with various value-added features

• Multimedia Services – Allows multiple parties to interact using voice, video, and/or data.

• Virtual Private Networks (VPNs) – Voice VPNs improve the interlocation networking capabilities of businesses by allowing large, geographically dispersed organizations to combine their existing private networks with portions of the PSTN, thus providing

subscribers with uniform dialing capabilities

.

NGN Services

network-based computing services for businesses and

• Information Brokering – Involves advertising, finding, and

providing information to match consumers with providers

services electronically over the network Home banking and

home shopping fall into this category of services This also

includes business-to-business applications

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NGN Services

• Call Center/Web Contact Services – A subscriber could place

a call to a call/Web contact center agent by clicking on a Web page

• Interactive gaming – Offers consumers a way to meet online and establish interactive gaming sessions (e.g., video games)

• Distributed Virtual Reality – Refers to technologically

generated representations of real world events, people,

generated representations of real world events, people,

places, experiences, etc.,

• Home Manager – With the advent of in-home networking and intelligent appliances, these services could monitor and

control home security systems, energy systems, home

entertainment systems, and other home appliances

NGN Today:

Facing the Multi-Application/Multi-Access Challenge

Conversational

real-Web, email, chat, etc.

Video on Demand

Gaming

Conversational time communication

real-Video on Demand (VoD)

High Definition TV (HDTV)

Smart Home

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