PowerPoint PresentationE2-E3
WELCOME
Module for the Topic: VSAT
• Eligibility: Those who have got the Upgradation
to from E2 to E3.
• This presentation is last updated on 15-3-2011.
• You can also visit the Digital library of BSNL to
see this topic.
AGENDA
VSAT Services
VSAT INTRODUCTION
(0.55-1.8 meters) for KU
- SMALL ANTENNA
VSAT INTRODUCTION
1. VSAT is a complete earth station that is installed at user
premises and provides business communication services.
2. VSAT systems can be designed to serve both
broadcast and interactive applications whether
data, voice or video.
3. Can be operated in either single or multi user
environment.
customer’s PC.
Interface RJ-45
V-SAT technology is a secure and reliable medium
to connect geographically dispersed locations and
represents a cost effective solution for users
seeking an independent communication network.
Broadband V-SAT of BSNL, operating in Ku band
of electromagnetic spectrum i.e. 11 to 18 GHz, offer
value added satellite based services capable of
supporting – Broadband internet access ,VOIP,
video conferencing, IP multicast, Local Area
Network, voice, Fax and can also provide powerful
dependable private communication solutions.
VSAT INTRODUCTION
provides high performance two-way
connectivity for Broadband access.
with the added advantage to serve remote
and inaccessible areas.
Corporate bodies, Training Centers,
Hospitals, Stock exchanges, Banks,
Technical institutions, Government, military
Advantages of VSAT Network
Relative independence of VSAT earth station from
terrestrial links.
superior to
the terrestrial alternatives.
The overall end to end availability to the users is in
excess of 99 percent.
Advantages of VSAT Network
locations that cannot afford to wait for such long lead
times.
calamities etc.
VSAT Components
VSAT consist of a small dish antenna ( 0.75 to 1.8
m), antenna feed, RF outdoor unit ( ODU ) and an
indoor unit (IDU).
Antenna dia < 3 M in C-Band and < 1.6 M in
Ku Band.
paraboloidal reflector and offset feeds.
For Internal circulation of BSNL only
VSAT Components
converts incoming I.F. (from IDU) to RF transmitting
frequency, amplifies it and passes it to feed.
LOW NOISE BLOCK DOWN CONVERTER
(LNB):-It amplifies incoming R.F. (Radio Frequency)
from feed using low noise amplifier, converts
it to I.F. and passes it to IDU.
-
INDOOR UNIT (IDU)
The indoor unit may be a small desktop box, or it
may be a network module integrated with a router
providing V-SAT network connectivity
Base T (RJ45), USB with maximum download
speed of up to 4 Mbps and maximum upload speed
of up to 2 Mbps.
For Internal circulation of BSNL only
INDOOR UNIT (IDU)
band signals which may be data, video or
voice.
band signals to I.F. and passes them to ODU.
I.F. is generally in L band. R.F. can be in C,
Ku or Ka bands.
VSAT IDU / ODU EQUIPMENT
flexible, Low-cost, and high performance Two way satellite User Terminal
•10/100 Fast Ethernet LAN port
Dish Power
LAN Link
Choice of Frequency Band
The case for C- and X band is ,when suitable Ku
bandwidth is not available or rain environment is
unsuitable in region of interest.
For these reasons, C-band, while demanding
dish sizes effectively twice that of Ku band, is
practical solution for VSAT’s in Pacific Islands,
Equatorial South America, Southeast Asia,
Central Africa and India.
FREQUENCY BANDS FOR VSAT
-INTERFERENCE TO ADJACENT SATELLITES &
Ku-BAND (14/10-12 GHz)
CAPACITY
VSAT NETWORKS
can be controlled from a single hub through
appropriate commands.
hub. The hub also takes care of billing etc.
BROADCAST CHARACTERISTICS :-The V-
for receiving TV broadcast signals in C band.
Small dishes measuring 1.5M to 3M are being
widely used for receive only applications for TV
broadcast for DTH services.
ELEMENTS OF VSAT NETWORKS
- NETWORK ARCHITECTURE
ELEMENTS OF VSAT NETWORKS (CONTD.)
- NETWORK PROTOCOLS
VSAT NETWORK SUBSYSTEMS
Network Topology
point, star, mesh, star/mesh and broadcast
configurations.
Star Network :- any number of V-SAT sites to
have two-way communication with a central
hub.
central hub is not necessary.
For Internal circulation of BSNL only
Satellite repeater
Uplink Downlink
Access Carriers from VSAT’s.
Figure : A Typical arrangement of outbound and inbound transmissions in a Star
VSAT network.
VSAT NETWORK ARCHITECTURE
APPLICATIONS
• COMMUNICATION VIA HUB
For Internal circulation of BSNL only
Star Configuration :
hops, through a Hub.
All information transfer is between remote node and
hub; direct single hop remote to remote data transfer is not
possible with this topology.
widely used.
VSAT NETWORK ARCHITECTURE
- It is received by all remote nodes within satellite
footprint.
desired remote to select the information destined for
them.
Star Configuration
- Inbound transmissions from VSAT’s employ one of
number of multiple access techniques ALOHA,TDMA,FDMA or CDMA.
VSAT networks with hub have the benefit of
centralized management and control provided with the
help of NOC (Network operation and control centre )
located at hub station.
Mesh Configuration :
Mesh configuration is point to point architecture and
allows any station to have a single hop connection with any
other station; using TDMA access.
There is no hub station with a large antenna to offset small
dish size and low transmit power of VSAT.
Each terminal has capability to reach any other at full data
rate, which is in range of 256 kbps to 10 Mbps.
This capability is sufficient to support full channel of
commercial quality MPEG 2 video along with audio and
other data.
KU band Broadband V-SAT Network
V-SAT Broadband (Ku band V-SAT) networks of BSNL designed in a hub and
spoke fashion
customer locations directly connected over the air to a central “hub” facility.
The equipment at a customer site
V-SAT receiver/router
Small dish mounted on top of or outside the building
For Internal circulation of BSNL only
KU band Broadband V-SAT Network
Equipment at the central hub facility
a large Satellite antenna of 8.1m Cassegrain feed type.
Sophisticated hub RF components receive and transmit to the remote sites, and route information to and from the internet or private networks.
GATEWAY Networking Equipment with interfaces to Terrestrial Networks
For Internal circulation of BSNL only
KU band Broadband V-SAT Network
Internet router is connected to BSNL National Internet Backbone using multiple 2 Mbps leased line
All Remote V-SAT locations are having private IP so that remote V-SAT users can connect to Internet.
BSNL’s Ku Band HUB (Earth Station) at BANGALORE
For Internal circulation of BSNL only
IP BASED VSAT BROADBAND SERVICE
Broadband Services on a single platform
Excellent networking solution for Corporate bodies, Banks, Hospitals, Stock exchanges, Educational institutions, Government, military etc.
Quick network deployment including inaccessible/remote areas
For Internal circulation of BSNL only
Quality Bandwidth Any Time Any Where
VSAT HUB EQUIPMENT
Services Offered
Leased Lines through VSAT on IP platform: Starting from 4Kbps and upto 2Mbps
High speed Broadband Internet
V-SAT Market
The Indian V-SAT market was valued at Rs 650crore in 2008-2009.
Around 25,000 V-SATs are sold every year, with the installed base growing at a CAGR of 25 percent.
For Internal circulation of BSNL only
The key driver of V-SAT market’s growth in India
need to spread connectivity to remote areas
the demand coming from the BFSI verticals
Telemedicine, interactive distance education, digital signage/cinema, stock-brokering SWAN projects, growth in the retail industry etc. will drive the growth in the market for the next 2-3 years.
Telecom/cellular networks are another major growth area, since the only way operators can affordably provide connectivity in some parts of India is through V-SAT.
For Internal circulation of BSNL only