ngn next generation network

NGNNext Generation Network

Concepts

Havar Bathaee

University of Tehran

December 7, 2014

Agenda

Introduction

NGN Definition

NGN Standardization

NGN Conceptual Model

Convergence Towards NGN

NGN Softswitch-Base Architecture

NGN Configuration and Topology

Conclusion

Havar Bathaee, NGN, Next Generation Network Concepts, University of Tehran

Introduction

Today, telephony, the Internet, and the cellular mobile

networks continue to be different domains, each has its own

protocols and services.

PSTN

INTERNET MOBILE

NGN


Others…

All-IP Network

Introduction General Idea

Packets

Voice

Data

Multimedia


IntroductionHistory


NGN Definition

NGN is a packet-based network able to provide

Telecommunication Services to users and able to make use of

multiple broadband, QoS-enabled transport technologies and in

which service-related functions are independent of the

underlying transport-related technologies. It enables unfettered

access for users to networks and to competing service providers

and services of their choice. It supports generalized mobility

which will allow consistent and ubiquitous provision of services to

users.


NGN Definition

Unified Global Networking Platform

Packet-Based Network

Provides Telecommunication Services to Users

QoS-enabled Transport Technologies

(Delay, Throughput, and Reliability)

Services are Independent of Transport Technologies

Unfettered Access for Users to Networks and Services

Generalized Mobility Which Allow Consistent and

Ubiquitous Provision of Services to Users


Characteristics

3GPP

NGN StandardizationKey Players

ITU-T

ITU Telecommunication

Standardization Sector

ITU-TNGN-GSI

ATISNGN FG

ETSITISPAN

ATIS

Alliance for Telecom.

Industry

ETSI

European Telecom.

Standards Institute

3GPP

3rd Generation Partnership

Project


NGN StandardizationKey Players (continued)


NGN StandardizationProblems

Within the NGN concepts the standardization institutions are still

working on the following issues and problems:

• Existing networks migration towards NGN

• Development in the field of access technologies

• Connection of other networks to IP networks

• Provision of services and development of new ones

• Interworking in the area of addressing

• Interworking of signaling systems

• Roaming a mobility



Fixed, Data, Cable,

Wireless fixed, Mobile,

Satellite

Transmission Packet

network, VOIP, Media

gateways, Signalling

gateway, Core Packet

network

MGC, Softswitch, Call

Agent, Gatekeeper

NGN applications and

services, application

server, features server,

media server

Access to

NGN


In the NGN it is required that the network control is not determined

only by the terminal equipment applications, but that the network

intelligence may carry out control over the network at all levels.

Management layer

Management layer tasks:

Resource management (capacity, ports, and physical elements)

and QoS in access to the network and the transport network

Various media processing, encoding, data transfer (information

flows)

Management of calls and connection. Management and

interworking of all elements of the reference architecture

Service control



Convergence towards NGN

Today’s network is divided into:

• Public Switched Telephone Network

• Packet Switched Networks (LAN, WAN,…)

• Cellular Mobile Networks

Convergence is the process of interconnection of traditional switched

circuit networks (PSTN and Mobile Networks) and packet-base

networks that use IP (Internet Protocol).


Migration scenarios of different types of networks platforms are

based on the idea to integrate TDM (Time Division Multiplexing)

and IP (Internet Protocol) platforms into one converged NGN

platform (from the point of network infrastructure, as well as

services).

Evolutional scenarios

TDM

IP

NGN



Evolutional scenarios (continued)


PSTN & IntelligentNetworks

Internet & DataNetworks

Cable Networks

Wireless & Mobile Networks

InternetTelephony

HybridNetworks

VoIPNetworks

VoCATV

GSM GPRS UMTS

NGN


From Vertical Silos to Horizontal NGN Architecture


Transport

Service

Control

Application

Access

End Points

Mob

ile

Net

work

s

PS

TN

/IS

DN

Data

/IP

Net

work

s

Cab

le/T

erre

stri

al

TV

Vertical Silo Architecture

per service

Services

Existing and Newly Emerging

Services

Horizontal Layered

Multi-Service Architecture

Services & Network Control

(QoS, Security, IP Mobility)

Multi-Service IP Backbone

Wireless

AccessWireline

Access

Services


Comparing the Features of PSTN/IN, Internet, and NGN


PSTN/IN Internet NGN

Multimedia Services NO YES YES

QoS support YES NO YES

Network Intelligence YES NO YES

Intelligent Terminal Equipment NO YES YES

Integrated Supervision & Control YES NO YES

Reliability High Low High

Service Creation Complex ad-hoc Systematic

Simplicity of Services use Medium High High

Modularity Low Medium High

Time of Service Introduction Long Short Short

Openness of Architecture Small High High


NGN Softswitch-Base Architecture

Access

Network

PSTN /

IN

RTP

RTCP

VoIP

IP / MPLS

MGCP

H.323

SIP

Trunking

Gateway

(MGW)

TDM RTP/RTCP

Access

Gateway

Media

ServerApplication

ServerSIG

T

M

Signaling

Gateway

Media

Gateway

Controller

SIP

SIP

MGCP

H.248

MGCP

H.323

SIP

MGCP

H.248

Media Gateway ControllerSIP-T, BICC


AG

NGN Softswitch-Base ArchitectureComponents

M

Media Gateway

Controller

Generally serves as components for controlling of communication

relations of users and other network components; provides call

routing, network signaling, billing, and other logical functions.

Call Agent Softswitch



T

Media Gateway

Operate within transport plane, perform all function related to media

physical transport between different networks, media processing

functions (transcoding, echo cancellation, jitter managing), tones

processing and management of information transport.

Trunking gateways: interface between the PSTN/PLMN and VoIP

Residential gateway: provide traditional analog (RJ11) interface to VoIP

Access gateway: provide traditional analog or PBX interface to VoIP

Signaling network: provide change of signalization systems between

PSTN/PLMN to VoIP



Application

Server

Application server is implemented to perform functionalities specific

to certain service, perform specialized service logic call control, also

includes more functionalities in terms of user web interface, end-

points management, etc. For example it can provide specific

videoconferencing service, Call Center service or IP Centrex service.



Media

Server

Media server provides functionalities allow interaction between

calling party and application using end-point device. It provides

Media Resource Functions (tones detection, speech synthesis and

recognition, compressions, media mixing, etc.) and Media Control

Functions that control of media functions (voice message play

management, conference bridge, fax message management, etc.)


NGN Configuration and Topology

INNI: Internal Network-Network Interface

NNI: Network-Network Interface

UNI: User Network Interface


Conclusion

Other Architectures

• IMS and entities (P-CSCF, I-CSCF,…)

• TISPAN NGN

• GSM

• …

NGN Protocols

• SIP (Session Initiation Protocol)

• SDP (Session Description Protocol)

• RTP (Real Time Transport Protocol)

• ...

NGN Standards

Services and QoS


Thank You

Any Question?

Havar Bathaee

University of Tehran

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