overview of ngn & ip tax. bsnl agenda present generation network concept of ngn ngn architecture...

Overview Of

NGN & IP TAX

BSNL

AGENDA

Present Generation Network

Concept of NGN

NGN Architecture

Concept of IPTAX

For internal circulation of BSNLonly

BSNL

COMPARISON NETWORK ACCESS CORE DESIGNED SWITCHING

FOR PRINCIPLE

PSTN Wires / LE TAX Voice Circuit

PLMN Air / BTS/BSC MSC Voice Circuit

PSPDN From Router Data PacketDifferent N/W

/Router


BSNL

PRESENT GENERATION NETWORK

• Fixed line usage is reducing dramatically

• Mobile use is increasing steadily

• Broadband Internet deployment shows a rapid growth trend.

• As per a study IP traffic increases 10 fold every year while voice traffic is relatively flat.


BSNL

PRESENT GENERATION NETWORK

• Complexity in maintenance-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


BSNL Regional Telecom Training centre

Features of NGN

• Packet-based network

• QoS-enabled transport technologies

• Service-related functions are independent of transport-related technologies

• Offers unrestricted access by users (Open Interface)

• Supports generalized mobility - Convergence btw. Fixed & Mobile

• Ubiquitous provision of services to users.

BSNL

CONCEPT OF NGN PSTN Switch

Call Control

Switching

Interfaces

TDM Transport Network

NGN Components

Call Server / Soft Switch

Routers of IP/MPLS Network

Gateways

Common IP MPLS Transport



ARCHITECTURE of NGN

Access Layer

Transport Layer

Control Layer (Soft-Switch)

Service Layer


Access Layer• Access Layers is responsible for direct subscriber

attachment function. • NGN is capable of processing traffic originated from

PSTN, GSM, CDMA, xDSL, WiMAX or any other access system.

• Access Layer consists of Gateways. • Trunk Media Gateway, Line Media gateway and

Signaling gateway.


Media Gateway

• The MG performs the task of packetizing voice and providing connections from switched circuits (TDM) to packetized circuits (IP)

BSNL

Functions of Media Gateway

• Voice encoding

• Packetization of voice channels

• CNF (Comfort Noise Generation)

• VAD (Voice Activity Detection)

• Echo Cancellation



Signaling gateway:

• The SG should be capable of providing conversions between SS7 addresses (point codes) and IP addresses.


Transport Layer

• Transport Layer forms the core of the Network.

• It basically consists of Routers

• Transport Layer of NGN is based on IP/ MPLS.


Control Layer

It consists of call servers• NGN may work on soft switch principle.• MGC (Media Gateway Controller)


Softswitch (Media gateway controller)

• The call handling is performed at the MGC

• The MGC is responsible for controlling all the MGs within its zone.

• The MGC also determines the QoS required for any one connection at the MG.

BSNL

Functions of soft switch

• Performs Call control, signaling and Interworking

• Traffic measurement and recording

functions

• Provides Addressing, Analysis, routing and

charging facilities

• Interacts with Application Server to supply

services not hosted on Softswitch



Service or Application Layer

• Enhanced services to the subscribers will be provided with the help of application servers.

• It may include prepaid servers, announcement servers, Service servers

BSNL

Functions of Announcement Server

• Announcement server performs the function of

giving the announcements as per requirements

in the network



Network Management System

• The Network Management System (NMS) manages all network elements in a Soft switch network.

• It typically uses SNMP to communicate with the network elements.


Media GatewayController Media Gateway

Controller

Application Server

Media Gateway

Signaling Gateway

PSTN/ End users

SIP, Parlay, Jain

Sigtran

H.248/Megaco

Application Server

Media Gateway

Signaling Gateway

PSTN/ End users

SIP-T

RTP

Application specific

NGN Protocols


NGN Architecture

using Soft switch


NGN SERVICES

• Voice Telephony

• Data (Connectivity) Services

• Multimedia Services

• Virtual Private Networks (VPNs

• Public Network Computing (PNC)

• Unified Messaging

• E-Commerce


• E-Commerce

• Call Center Services

• Interactive gaming

• Home Manager

• Push to talk over NGN .

• Point-to-Point interactive multimedia services


• Content delivery services

• Broadcast/Multicast Services

• Hosted and transit services for enterprises (IP Centrex, etc.)

• Sensor Network services


Review Questions…

1. The call control intelligence of NGN is known as ------

2. The ------------------ performs the task of packetizing voice and providing connections from switched circuits (TDM) to IP circuits

3. The NGN Access Layer consists of ---------------------

4. Transport Layer of NGN is basically consists of --------

5. Between Media Gateways (MGs) and Media Gateway Controllers (MGCs) the protocol used is -----

6. The protocol --------------- is used between two MGs for packetized bearer traffic.

BSNLRegional Telecom Training centre

NGN Implementation in BSNL (IP TAX)

BSNL

NGN Implementation in BSNL

• Migration Strategies:

• Two types of migration scenarios could be foreseen based on – A replacement strategy – An overlay strategy

Regional Telecom Training centre,Trivandrum

BSNL

Replacement strategy

It consists of replacing traditional PSTN equipment by next generation

equipment.


BSNL

Overlay Strategy

With an overlay strategy, the NGN network will integrate current circuit-switched and packet-switched

technologies


BSNL

Migration Strategy of BSNL

• Class 4 NGN

• Introduce IP Tax in Transit network at Level-1 TAX locations (IP TAX Project)


BSNL

Phase I Migration

• Replacing the transit network with soft switch architecture.

• Local Exchanges -Connected to Trunk Media Gateways for transportation of Media

• To Signaling Gateway for signaling transport.

Regional Telecom Training centre


Phase I Migration


Phase II Migration

BSNL

Phase III

• IMS

• End to end IP traffic .

Regional Telecom Training centre

BSNL

Class 5 NGN

• Extend IP network to Level-2 TAXs and large scale implementation in Access Network

• Develop MPLS core at Circle and LDCA Level.


BSNL

The implantation plan

• Setting up Two Soft Switches at New Delhi and Chennai and

• Signalling Gateways at New Delhi, Chennai, Kolkotta and Bangalore

• Providing Trunk Media Gateways (TMGs) at 21 Level-1 locations


BSNL


• Providing one Announcement Servers in each IP domain i.e. one at New Delhi and one at Chennai.

• Billing interface to Centralized Billing Server at Chennai.

• NMS at Chennai with FCAPS • (Fault,Configuration,Accounting,Perform

ance,Security) capabilities.


BSNL


• No separate NTP server is being used in IP TAX, the existing NTP server of our data network will be used for synchronization


BSNL Regional Telecom Training centre,Trivandrum


THANKS

overview of ngn & ip tax. bsnl agenda present generation network concept of ngn ngn architecture...

Documents

bsnl convergence slide

medium convergence slide

equipment convergence

highspeed network

core network

network entities

different services

various services