Next Generation Networks

An Overview

INTERNAL/DTAX SECTION

INTERNET & BROADBANDINTERNET & BROADBAND

CDR/ERP,COMPUTERCDR/ERP,COMPUTEROCB LOCAL OCB LOCAL

MDF & PPMDF & PP

OCB TAXOCB TAX

Services/Units

PSTN model Vs NGN model

Voice Network

IPNetwork

VideoNetwork

StorageNetwork

IPNetwork (for Voice, Data & Video)

• Dedicated Network per service

• Large Invest

• Multiple technologies / Knowledge

• Convergence technologies

• Cost reduction

• One Protocol, one Knowledge

Voice Data Video Storage voice Data Video Storage

Gateways

Internet

Wireless TelephoneSystem

Workstation

IntegratedServices Over IP

Workstation

Evolving towards IP Communications

Next Generation Networks (NGN)Present Day Networks

PSTN and NGN comparison

PSTN NGNCarrier line Dedicated line for

voiceVoice – data – video on the same connection

Bandwidth Fixed consumption Less bandwidth used, with silence and compression algorithm.

Infra cost Large Invest Less Invest

Quality High Quality Difficult to predict

New added service

Hard to integrate Easy to integrate

Convergence Hard to converge Easy to converge

Knowledge for ISP

Acquired New acquisition

Knowledge for incumbent

acquired New acquisition

- Duplicating Capital Expenditure

- Cumbersome network and customer’s databases

- Complexity in maintenance I.e increased operational expenditure

- Difficulty in deployment of new services.

- Proprietary protocols between the network entities resulting into expensive add-ons.

- Demand of innovative services from customers

Current Generation Network

- Packet based network

- Integrated and converged network infrastructure for all the

existing services, plus innovative services.

- Unrestricted access to customers

- Service related functions independent from underlying transport

related technologies.

- Layered architecture with functional planes separated by open

interfaces enabling third party services and applications.

- Multi service network

Next Generation Networks

ITU-T definition for NGN:A Next Generation Network (NGN) is a packet-based network able to provide services including 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. It offers unrestricted access by users to different service providers. It supports generalized mobility which will allow consistent and ubiquitous provision of services to users

Interfaces

Switching

Call ControlCall Server / Soft Switch

Routers of IP/MPLS Network

Gateways

PSTN Switch

NGN Components

TDM Transport Network

Common IP MPLS Transport

SG / TMG / LAG

Control Layer

Transport Layer

Access Layer

Call Control

Switching

Interfaces

Transit

Call Control

Switching

Interfaces

Call Control

Switching

Interfaces

Local Exchange

Local Exchange

Signaling & Bearer

Signaling & Bearer

Circuit Switching (CAS)

Bearer is a voice channel

Call Control

Switching

Interfaces

Transit

Call Control

Switching

Interfaces

Call Control

Switching

Interfaces

Local Exchange

Local Exchange

Bearer Bearer

Circuit Switching (CCS)

Call Control

Switching

Interfaces

Signaling Signaling

STP

Call Control

Switching

Interfaces

Transit

Call Control

Switching

Interfaces

Call Control

Switching

Interfaces

Local Exchange

Local Exchange

Bearer Bearer

Circuit Switching (CCS)

Signaling SignalingSignaling Transfer

Call Control

Transit

Call Control

Switching

Interfaces

Call Control

Switching

Interfaces

Local Exchange

Local Exchange

Bearer Bearer

Circuit Switching (CCS)

Signaling SignalingSignaling Transfer

Bearer Transfer

Soft switch

Transit

Call Control

Switching

Interfaces

Call Control

Switching

Interfaces

Local Exchange

Local Exchange

Bearer

Bearer

Soft Switching Transit Architecture

Signaling Signaling

Gateway

GatewayGateway

Gateway

Common IP MPLS Transport

Soft switch

Transit

Call Control

Switching

Interfaces

Local Exchange

Bearer

Next Generation Switching

Signaling

Gateway

Gateway

Gateway

Common IP MPLS Transport

Application Layer

ControlBearer

Control Layer Softswitch

ControlIP ServiceSwitching

ApplicationServices

TransportLayer

PSTN

Internet

MultiservicePacket Switching

XX X XX

CORE NETWORKS

XNational Optical

BroadbandAccess

GbEGbE

DSLAMDSLAM

ACCESSNETWORK

Frame/ATM

Frame/ATM

WirelessWireless

CPECPE

Media Gateways

Metro Optical

X

XX

X

New Service Opportunities

Voice ServicesHigh-Speed Internet AccessCorporate VPNs“Friends & Family” VPNsVideo and Audio EntertainmentInteractive GamingPersonal Video ConferencingRemote MonitoringOn-Demand Storage Services

Distance Learning Health Care Financial Services Unified Messaging Mobility Services (Cell, PDA,

Paging) Derived Voice Lines (VoDSL,

VoIP) Security, Disaster Recovery Wi-Fi Integration Services

NGN Components

Media Gateway Controller (MGC)

Media Gateway (MG)

Signaling Gateway (SG)

Softswitch

Application/Feature Server

Protocols

Media Gateway Controller

MGC perform call control and signaling routing for PSTN and Signaling System #7 (SS7).

MGC uses a Signaling Gateway (SG) to get SS7 signaling over IP, and provides ISUP to SIP and back translation.

MGC controls Media Gateway (MG) using MEGACO/H.248 to translate the voice/media call component from TDM to RTP and back.

MGC talks to the SIP Server using Session Initiation Protocol (SIP).

Media Gateway

The media gateway provides a means to transport voice, data, fax, and video media between the IP network and the PSTN network.

The MG is governed by the MGC, which informs the MG when to prepare to setup a call, which MG to contact on the destination side, when to start sending the voice signal, and when to terminate a call.

TP1610

AudioCodes’ Media Gateway Offerings

Wireline & Wireless Up to 480 Ch.

1610

HA SystemWireline & Wireless

18,000 Ch.

7,200 Ch.

63101610

TP6310

Mediant 8000

Mediant™ 2000

Large GW

Small and Very Small GW

SMON’ Media Gateway Offerings

Signaling Gateway

A Signaling Gateway creates a bridge between the SS7 network and an IP network, under the control of the Media Gateway Controller.

The Signaling Gateway serves as the gateway between the SS7 Signaling network and the nodes managed by the Softswitch in the IP network. A Signaling Gateway requires physical connectivity to the SS7 network and must be aware of the required protocol suites.

Intel’s Signaling Gateway Offerings

Performance Tech’s Signaling Gateway Offerings

The SIP server is an application layer element which enables service provider to build scalable,reliable packet voice networks.

SIP server routes calls between MGCs, H.323 Gateways, IP endpoints (such as IP phones), and Application Servers.

SIP server enables centralized flexible routing.

Softswitch

Application/Features Server

The Application ServerApplication Server provides all the revenue generating features and services such as billing, multiparty conferencing, Lawful Intercepts etc.

Traffic Management System Operational Support System

The Media ServerMedia Server performs peripheral functions , to enrich the Softswitch with media capabilities.

Voice Mail Server Calling Card/PrePaid Server Annc. Server

Softswitch Architecture – Interdomain protocols

Application Server

Media Gateway

Signaling Gateway

Media GatewayController

PSTN/ End users

SIP, Parlay, Jain

Sigtran

H.248,MGCP

Application Server

Media Gateway

Signaling Gateway

Media GatewayController

PSTN/ End users

SIP-T,BICC

RTP

Application specific