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IP TAX Project. Presented by : R. K. Kaushik, Jt. DDG (TAX). NGN Concept. Service / Application Layer. Control Layer. PSPDN. PLMN. PSTN. Transport Layer. Access Layer. Each vertical on the left has to be split into Network Elements that map onto horizontals on the right. NGN Concept.

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Ip tax project

IP TAX Project

Presented by : R. K. Kaushik, Jt. DDG (TAX)


Ngn concept

NGN Concept

Service / Application Layer

Control Layer

PSPDN

PLMN

PSTN

Transport Layer

Access Layer

Each vertical on the left has to be split into Network Elements that map onto horizontals on the right


Ngn concept1

NGN Concept

Service / Application Layer

Application Layer

NGN

IMS

Transport Layer

Access Layer

PLMN

PSTN

Circuit to Packet migration is first step in mapping of

PSTN to NGN


Ngn itu perspective

NGN – ITU Perspective

  • Next Generation Network (NGN) provides a framework for network evolution, as defined by the ITU-T (Rec. Y.2001)

  • Key Characteristics

    • Packet-based network [generally Internet Protocol or IP]

    • Independence of service-related functions from underlying transport technologies

    • Interworking with legacy networks via open interfaces

    • Generalized mobility

    • Unrestricted access by users to different services and/or service providers


Etsi ngn vision

ETSI NGN Vision

  • Mobile/Fixed Convergence, based on the “IMS” platform

  • A multi-service, multi-protocol, multi-access,IP based network - secure, reliable and trusted

  • Multi-services: delivered bya common QoS enabled core network.

  • Multi-access: diverse connectivity networks;fixed and mobile terminals, (Mobile, xDSL, etc)

  • Not one network, but different networksthat interoperate seamlessly

  • Mobility of both users and devices

  • “My communications services”

    • anywhere, any terminal

      >>> all of this leads to a true Next Generation Network


The vendor s perspective

The Vendor’s Perspective

•Mobile: Motorola, NEC, Nokia, Samsung

•Fixed: Cisco, Italtel, Sonus, Tekelec, Veraz

•Mobile/Fixed: Alcatel, Ericsson, Siemens, Huawei, UTStarcom

•Fixed/Mobile: Lucent, Nortel

•Mobile/Fixed and Mobile are leaders in Session Management

•Fixed and Fixed/Mobile are leading with MGCF


Pstn to ngn migration bsnl perspective

PSTN to NGN MigrationBSNL Perspective


Ip tax project

PSTN to NGN

PSTN Switch

NGN Components

Call Server /

Soft Switch

Call Control

Switching

Routers of

IP/MPLS

Network

Interfaces

Gateways

SG / TMG / LAG

TDM Transport Network

Common IP MPLS Transport


Ip tax project

Softswitch

STPNetwork

Signaling

Gateway

Announcement

Server

Trunk

Media

Gateway

IP MPLS Core Network

PSTN Switch

Step- 1: IP TAX – Class 4 NGN


Ip tax project

GENERIC REFERENCE DIAGRAM FOR ‘IP BASED TAX’

NMS

Sigtran / SCTP

Sigtran / SCTP

Softswitch (MGC)

Softswitch (MGC)

SIP-T

SG 1,2

SG 1,2

Q.1912.5

SS7

SS7

ANNOUNCEMENT SERVER

ANNOUNCEMENT SERVER

H.248

STP Function

STP Function

NTP SERVER

CORE IP BACKBONENETWORK

H.248

SS7

SS7

PSTN

PSTN

Bearer Channels

Bearer Channels

MG

MG

IP/RTP


Scope of ip tax project

Scope of IP TAX Project

  • 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

  • Providing one Announcement Servers in each IP domain

  • Billing interface to Centralized Billing Server

  • NMS


Ip tax components

IP TAX Components

  • Soft Switch (or Call Agent or Telephony Server or Media Gateway Controller)

    • Based upon Open Architecture

    • Should preferably be developed on Commercially Available Hardware and Software Platforms

    • Should be able to provide all existing services available in TDM network

    • Performs Media Gateway Control Function

    • Performs Call control, signalling 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


Ip tax components1

IP TAX Components

  • Signalling Gateway

    • Provides interworking function between SS7 network and IP network

      • This involves providing various types of User Adaptations so that the SS7 signalling can be terminated in SGW and can be translated and messages transported over IP Network

    • Performs Packetization of signalling and ensures its transport through IP network


Ip tax components2

IP TAX Components

  • Trunk Media Gateway

    • Performs the functions of

      • Voice encoding & Compression

      • Packetization of voice channels

      • CNF (Comfort Noise Generation)

      • VAD (Voice Activity Detection)

      • Echo Cancellation

      • May provide the edge functionality and act as CE


Ip tax project

NMS

Soft switch (MGC)

AS

EMS

SG

New Delhi

0

PT - 8

AM - 4

MG

RJ - 4

MG

AG - 4

MG

MG

LW - 4

MG

MG

JLN - 4

MG

KOL - 16

ND -40

MG

GU - 4

BSNL’s MPLS Core

MG

Existing STP N/w

MG

MG

JPR - 4

MG

RPR - 4

AHM - 8

MG

MG

MG

HYD - 8

BPL - 4

MG

MG

MG

CHN - 16

MG

CBT - 4

MBI - 40

MG

MG

NGP – 4

BG - 12

ENK - 4

CK - 4

Chennai

Soft switch (MGC)

AS

EMS

SG


Future ip tax requirement

Future IP TAX Requirement


Ip tax project

Softswitch

Application

Servers

STPNetwork

Signaling

Gateway

Announcement /

Media

Server

Trunk

Media

Gateway

IP MPLS Core Network

Other VoIP Network

Session

Border

Controller

PSTN Switch

Line /

Access

Gateway

Customer Network

Access Network

Step 2: IP TAX and Access in NGN


Class 5 components

Class 5 Components

  • Application Server (or Feature Server)

    • Provides service logic and execution of user (or customer) services that are not directly hosted on Softswitch

    • Due to open architecture and standards it can be a third party product


Class 5 components1

Class 5 Components

  • Session Border Controller (SBC)

    • Deployed at edge (IP-IP network border as between service provider and customer / enterprise network) and core (IP-IP network border as between two service providers) of service provider’s network to control signaling and media streams as they enter / exit the network

    • Provides security, denial of service attacks, overload control, Network Address Translation and Firewall Traversal, Lawful Interception, QoS management, Protocol Translation, call accounting


Class 5 components2

Class 5 Components

  • Access Gateway

    • Performs the functions of

      • Media conversion

      • Codec Negotiation

      • Termination of line side interfaces like phones, devices and PBXs

      • Echo Cancellation

      • VAD (Voice Activity Detection and Comfort Noise Generation)

      • Providing edge functionality and act as CE router


Next generation switching architecture

RSU

Next Generation Switching Architecture

Application

Server

Soft switch

SBC

Line

Access

Gateway

PRI

Access

Gateway

SHDSL

V5.2

Common IP MPLS Transport

2B+D

ADSL/ADSL2+

AN

TMG

E1s

Local / Rural Exchanges

SSTP Network


Ngn definition

NGN Definition

  • 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


Ims architecture

Step 3: Fully Converged Architecture

IMS Architecture


Ims key components

Network Function

Role

Origin

Call Session Control Function (CSCF)

Handles registration of end points, routing of SIP signaling messages

SIP Proxy Servers, Developed from scratch

Home Subscriber Server (HSS)

One-stop database for user information

HLR from mobile network

Media Gateway Control Function (MGCF)

Softswitch Media Gateway Control

Softswitch

Application Server (AS)

Provide service logic for applications

Feature Servers, Feature sets from Softswitches

Policy Decision Function (PDF)

Provides QoS

Existing Policy Managers, from scratch

IMS Key Components


Migration path to ims

Migration Path to IMS


Thank you

THANK YOU


Ngn class 5 features

NGN Class 5 Features

  • Mobility: It should be possible for users to register dynamically their current location so that they can be contacted when mobile using a publicized address

  • Forking: It should be possible to associate multiple devices with a single address, so that all or a selection of these devices can be contacted simultaneously or in succession

  • Features Negotiation: It should be possible for the users to negotiate media and protocol extensions to be used for a particular call for setting up any type of media conversation, including voice, video and messaging


Ngn class 5 features1

NGN Class 5 Features

  • Applications Flexibility: It should be possible to define, create and implement new applications in the network. The new applications may be built up on separate Application Servers which may be located in the same network / domain or in some other network / domain. The addition of new applications will normally not require changes in any of the devices, other than hosts, in the transport network

  • Combinational services: It should be possible to combine different services into one service e.g., instant messaging and voice


Comparison

Soft Switch

Small step

Yields IP cost advantages

Easily supports current PSTN services

Makes use of Intelligent Network (IN) services

IMS

Big step

Yields IP cost advantages

Does not as easily support current PSTN services

Does not use IN

Platform for non PSTN services

Achieves fixed & mobile core network convergence.

Comparison


Circuit switching cas

Circuit Switching (CAS)

Transit

Local Exchange

Local Exchange

Call Control

Call Control

Call Control

Switching

Signaling & Bearer

Switching

Signaling & Bearer

Switching

Interfaces

Interfaces

Interfaces

Bearer is a voice channel


Circuit switching ccs

Circuit Switching (CCS)

Transit

Local Exchange

Local Exchange

Call Control

Call Control

Call Control

Switching

Bearer

Switching

Bearer

Switching

Interfaces

Interfaces

Interfaces

Call Control

Switching

Signaling

Signaling

Interfaces

STP


Circuit switching ccs1

Circuit Switching (CCS)

Transit

Local Exchange

Local Exchange

Call Control

Call Control

Call Control

Switching

Bearer

Switching

Bearer

Switching

Interfaces

Interfaces

Interfaces

Signaling

Signaling

Signaling Transfer


Circuit switching ccs2

Circuit Switching (CCS)

Transit

Local Exchange

Local Exchange

Call Control

Call Control

Call Control

Bearer

Bearer Transfer

Switching

Bearer

Switching

Interfaces

Interfaces

Signaling

Signaling

Signaling Transfer


Soft switching transit architecture

Soft Switching Transit Architecture

Transit

Local Exchange

Local Exchange

Soft switch

Call Control

Call Control

Gateway

Gateway

Bearer

Switching

Switching

Bearer

Common IP MPLS Transport

Interfaces

Interfaces

Signaling

Gateway

Gateway

Signaling


Next generation switching

Next Generation Switching

Transit

Local Exchange

Soft switch

Call Control

Gateway

Gateway

Bearer

Switching

Common IP MPLS Transport

Interfaces

Gateway

Signaling


When 3g and mpls core are available

When 3G and MPLS core are available

Transit Option-I

Local Exchange

GSM Network

3G

Call Control

Bearer

Switching

Interfaces

Signaling

Common IP MPLS Transport


When 3g and mpls core are available1

When 3G and MPLS core are available

Transit Option-II (Preferred Solution)

Local Exchange

Soft switch

GSM Network

3G

Call Control

TMG

Bearer

Switching

Common IP MPLS Transport

Interfaces

SGW

Signaling


Ims architecture1

IMS Architecture


Ip tax project

Overview of NMS Site - Chennai

NMS

Local Terminals

AS

LAN

SW

PLMN

SSW

FE

FE

Billing System

PSTN

TMG

Gig-E

SGW

E1/STM-1

FE

MPLS Edge

STP

PSTN/PLMN

Gig-E


Ip tax project

Overview of Soft Switch Site - New Delhi

Remote NMS Terminals

AS

LAN

SW

PLMN

SSW

FE

FE

PSTN

TMG

SGW

Gig-E

E1/STM-1

FE

MPLS Edge

STP

PSTN/PLMN

Gig-E


Ip tax project

Overview of SGW Site – Bangalore & Kolkatta

Remote NMS Terminals

LAN

SW

PLMN

PSTN

TMG

SGW

Gig-E

E1/STM-1

FE

MPLS Edge

STP

PSTN/PLMN

Gig-E


Ip tax project

Overview of Other 16 Level-I Sites

Remote NMS Terminals

LAN

SW

PLMN

PSTN

TMG

Gig-E

E1/STM-1

MPLS Edge

Gig-E


Ip tax project

EOI


Eoi for ngn project

EOI for NGN Project

  • The TAX requirement for next two years is about 6.5 million circuits

  • Tender for deployment of 200 KC IP TAX is under evaluation

  • EOI is being floated for inviting bidders to get their equipment validated

  • Successful bidders in EOI will become eligible to participate in the future requirement of 6.5 million DS0s


Eoi for ngn project1

EOI for NGN Project

  • The EOI is for both IP TAX(Class 4) and Access Network (Class 5)

  • The EOI envisages validation for three types of Configurations viz.,:

    •  a) Configuration 1.0 (IP-TAX)

    • b) Configuration 2.0 (Access Network)

    • c) Configuration 3.0 (Application Services)

  • Validation Certificates are proposed to be issued for each configuration


Equipment for configuration 1 0

Equipment for Configuration 1.0


Equipment for configuration 2 0

Equipment for Configuration 2.0


Equipment for configuration 3 0

Equipment for Configuration 3.0


Services requested

Services Requested

  • Caller ID related services (CLIP, CLIR, ...)

  • Call waiting, Call holding, Push to talk

  • Call forwarding, Call transfer

  • Follow me service

  • Call blocking services, Malicious Caller Identification

  • Click to Dial

  • Musical Ring Back

  • Lawful interception

  • Announcement services

  • Conference call services

  • Voicemail, Text-to-speech, Speech-to-text

  • SMS, MMS

  • IP Centrex

  • Calling Card

  • Pay Phone

  • Carrier Selection

  • Presence information, Instant messaging


Additional features in configuration 3 0

Additional Features in Configuration 3.0

  • Offered services shall have the following features:

    • Mobility: It should be possible for users to register dynamically their current location so that they can be contacted when mobile using a publicized address

    • Forking: It should be possible to associate multiple devices with a single address, so that all or a selection of these devices can be contacted simultaneously or in succession

    • Features Negotiation: It should be possible for the users to negotiate media and protocol extensions to be used for a particular call for setting up any type of media conversation, including voice, video and messaging


Additional features in configuration 3 01

Additional Features in Configuration 3.0

  • Offered services shall have the following features:

    • Applications Flexibility: It should be possible to define, create and implement new applications in the network. The new applications may be built up on separate Application Servers which may be located in the same network / domain or in some other network / domain. The addition of new applications will normally not require changes in any of the devices, other than hosts, in the transport network

    • Combinational services: It should be possible to combine different services into one service e.g., instant messaging and voice


Issues

Issues

  • Should separate validation certificates be issued for the above three configurations

  • Should validation be carried out in TEC lab (if feasible)or should BSNL allot one site to each bidder

  • SIP services (and user mobility features) are proposed to be validated in Configuration 3.0. However, this is not covered in TEC GRs presently.Either the existing GRof Soft Switch for Local Applications needs to be upgraded or a separate GR may be required

  • Edge Routers will be required at all Level-II TAX locations

  • Routers planning below LDCC level

  • ENUM


Ip tax 1 st step towards ngn

IP TAX - 1st Step towards NGN

  • Why NGN

Concept of NGN

1st Step

Future Steps


Current scenario

Current Scenario

  • Level-I TAXs at 21 locations (LDCAs)

  • Level-II TAXs at 301 locations (LDCAs) Total No. of LDCCs - 322

  • Tandem / Transit Switches at Big Cities / SDCC locations (2325 locations) Total No. of SDCCs 2647

  • Switches based on the principle of Circuit Switching


Essential features of public network

Essential Features of Public Network

  • Requirements

    • QoS guarantee

    • High availability

      • Equipment hot-swappable hardware

      • 99.999% availability

      • On-line software upgrades

    • Scalability

    • Based on global (open) standards

    • Support for a new range of applications


Need for ip tax ngn

Need for IP TAX / NGN

  • Traditional public networks:

    • typically comprise of individual voice & data networks

  • Separate networks mean:

    • Low Return on investment

    • High O&M costs due to separate networks

    • Low capability of services integration

    • Less Flexibility - High cost


Advantages of ip tax ngn

Advantages of IP TAX / NGN

  • Bandwidth Saving

    • Up to 1:4

  • Reduced Energy Consumption

    • Up to 1:3 saving

  • Reduced Operational Costs

  • Reduced spare & repair costs

    • Up to 90% saving

  • Reduced accommodation costs

    • Up to 1:5

  • Network Consolidation & Trunk optimization

  • Capability to provide all services including Network Wide Services


Ip tax 1 st step towards ngn1

IP TAX - 1st Step towards NGN

Why NGN

  • Concept of NGN

IP TAX Project of BSNL

Future Deployments


Ip tax 1 st step towards ngn2

IP TAX - 1st Step towards NGN

Why NGN

Concept of NGN

  • IP TAX Project

Future Steps


Ip tax 1 st step towards ngn3

IP TAX - 1st Step towards NGN

Why NGN

Concept of NGN

IP TAX Project

  • Future Steps


Migration steps

Migration Steps

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

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

  • Develop MPLS core at Circle and LDCA Level

  • Offer Voice and Multimedia services to Broadband Subscribers using DSL, Optical Ethernet technologies


Ip tax project

Below SDCA Level IP Network

A case of Metro City

RSU

P

Metro

Backbone

PE

BLC

MG

AGW

LAG

SHDSL

V5.2

ADSL/ADSL2+

E1

E1

PRI

AN

2B+D

Local / Rural Exchanges


Ip tax project

Below SDCA Level IP Network

A case of Normal City

RSU

P

PE

BLC

MG

AGW

LAG

SHDSL

V5.2

ADSL/ADSL2+

E1

E1

PRI

AN

2B+D

Local / Rural Exchanges


Ip tax project

Below SDCA Level IP Network

A case of Normal SDCA

RSU

P

PE

MG

AGW

V5.2

E1

E1

PRI

AN

Local / Rural Exchanges


Mpls core network

MPLS Core network

MPLS Core Network

Mesh network

Connecting all Level-1 TAXs at 2.5G λ / 10G λ


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