1. Overview Of NGN & IP TAX

2. AGENDA Present Generation Network Concept of NGN
NGN Architecture Concept of IPTAX
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3. PRESENT GENERATION NETWORK
Internet
Gateways
Wireless
PSTN
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4. For internal circulation of BSNLonly
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
Packet
Different N/W
/Router
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5. 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.
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6. 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
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7. Convergence

8. (Equipment Convergence)
ITU – 5 point Definition
1. Integration of Customer End Equipments/Access devices such as Telephones, TV and PC.
(Equipment Convergence)

9. Convergence ?
2. Provision of various Communication services such as Text, Data, Image, Multimedia and Video services over the existing Infrastructure or over a single Transmission medium.
(Medium Convergence)

10. Convergence ?
3. Capability of same Technology to offer various services. (Technology Convergence)
4. Different services under a converged licensing regime.
5. Fixed Mobile substitution/Convergence

11. CONCEPT OF NGN Target Standards Area
A NGN is a packet-based network able to provide 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.
Definition of NGN
(Draft Rec. Y.2001)
Target Standards Area
Generalized Mobility Unrestricted Access
Convergence btw. Fixed & Mobile
Open Access I/F
Separation Services with Transport
Architecture and Open API
QoS-enabled Transport
Manageable Broadband
Multiple-Broadband

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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.
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13. Call Server / Soft Switch Common IP MPLS Transport
CONCEPT OF NGN
PSTN Switch
NGN Components
Call Server / Soft Switch
Call Control
Routers of
Switching
IP/MPLS Network
Interfaces
Gateways
TDM
Transport Network
Common IP MPLS Transport
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FEATURES OF NGN
·  Packet-based network
· Very High-Speed Network from access to core
· Network providing generalized mobility:
· Unified and Universal Networks
· Centralized Control
Open Interfaces
Common transport
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ARCHITECTURE of NGN
·  Access Layer
·  Transport Layer
· Control Layer (Soft-Switch)
· Service Layer
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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.
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Media Gateway
The MG performs the task of packetizing voice and providing connections from switched circuits (TDM) to packetized circuits (IP)
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22. Functions of Media Gateway
• Voice encoding
• Packetization of voice channels
• CNF (Comfort Noise Generation)
• VAD (Voice Activity Detection)
• Echo Cancellation
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Signaling gateway:
The SG should be capable of providing conversions between SS7 addresses (point codes) and IP addresses.
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Transport Layer
Transport Layer forms the core of the Network.
It basically consists of Routers
Transport Layer of NGN is based on IP/ MPLS.
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Control Layer
It consists of call servers
NGN may work on soft switch principle.
MGC (Media Gateway Controller)
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26. 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.
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27. Functions of Soft Switch
• Based upon Open Architecture
• Provide all existing services available in TDM network
• Performs Media Gateway Control Function
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28. 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
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29. 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
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30. Functions of Announcement Server
• Announcement server performs the function of giving the announcements as per requirements in the network
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31. 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.
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32. Integrated Access Devices
The Integrated Access Device (IAD) provides voice or voice and data services for individuals, and SOHO subscribers by connecting the subscribers´ terminal equipment such as PC, telephone and fax machine into the packet network.
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NGN Protocols
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NGN Protocols
Media Gateway
Controller
Application
Server
Media
Gateway
Signaling
PSTN/
End users
SIP, Parlay, Jain
Sigtran
H.248/Megaco
SIP-T
RTP
Application specific
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NGN Architecture using Soft switch
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NGN SERVICES
Voice Telephony
Data (Connectivity) Services
Multimedia Services
Virtual Private Networks (VPNs
Public Network Computing (PNC)
Unified Messaging
E-Commerce
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E-Commerce
Call Center Services
Interactive gaming
Home Manager
Push to talk over NGN .
Point-to-Point interactive multimedia services
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Content delivery services
Broadcast/Multicast Services
Hosted and transit services for enterprises (IP Centrex, etc.)
Sensor Network services
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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.
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NGN Implementation
in BSNL (IP TAX)
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41. NGN Implementation in BSNL
Migration Strategies:
Two types of migration scenarios could be foreseen based on
A replacement strategy
An overlay strategy
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Replacement strategy
It consists of replacing traditional PSTN equipment by next generation equipment.
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Overlay Strategy
With an overlay strategy, the NGN network will integrate current circuit-switched and packet-switched technologies
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44. Migration Strategy of BSNL
Class 4 NGN
Introduce IP Tax in Transit network at Level-1 TAX locations (IP TAX Project)
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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.
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Phase I Migration
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Phase II Migration
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Phase III
IMS
End to end IP traffic .
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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.
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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
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The implantation plan
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,Performance,Security) capabilities.
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The implantation plan
No separate NTP server is being used in IP TAX, the existing NTP server of our data network will be used for synchronization
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THANKS
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