-
8/9/2019 Vsat Technology for the Rural Upliftment - Copy
1/17
VSAT TECHNOLOGY FOR THE
RURAL UPLIFTMENT
By:
N Vamsee Krishna 07b81a1054
P Priyanka 07b81a1031
CVR College Of Engineering
-
8/9/2019 Vsat Technology for the Rural Upliftment - Copy
2/17
What is VSAT?
VSAT stands for Very Small Aperture Terminalwhich refers to a
small fixed earth station.
VSAT technology is atelecommunications system
based on wireless technology. A Very Small Aperture Terminal
(VSAT), is atwo-
way satellite ground station withadishantennathat is smaller
than 3 meters.
VSATs access satellites ingeosynchronous orbit torelay data from
small remoteearth stations toother terminals or master earth
station,the"hubs"
-
8/9/2019 Vsat Technology for the Rural Upliftment - Copy
3/17
Vital roleand Importance
VSATs provide the vital communication link required to
set up a satellite based communication network.
It is very easy to use, the connections are extremely
fast, and the service is flexible and always reliable,evenin the
villages.
This type of Internet connection is also great for areas
that are rural or are perhaps undeserved by reliableInternet
Service Providers.
VSAT broadband is a way to have the latest technology
without having to go through a local ISP.
-
8/9/2019 Vsat Technology for the Rural Upliftment - Copy
4/17
COMPONENTS OF VSAT NETWORKTherearethreecomponents in VSAT
technology
MASTER EARTH STATION
VSAT REMOTE STATION
SATELLITE(GEO STATIONARY SATELLITE)
-
8/9/2019 Vsat Technology for the Rural Upliftment - Copy
5/17
MASTER EARTH STATION
Anearth station, ground station, or earthterminal is
aterrestrial terminal stationdesigned for
extraplanetarytelecommunication withspacecraft, and/or
receptionofradio waves from anastronomical radio source.
Earth stations may occupy either a fixed or
itinerantposition.
Theearth station itself is usually anantenna thatincludes a
low-noiseamplifier, adown-converter, aswell as anelectronics
receiver.
Whenanearth station successfully transmits radiowaves to a
spacecraft (or viceversa), itestablishes atelecommunications
link.
-
8/9/2019 Vsat Technology for the Rural Upliftment - Copy
6/17
VSAT EARTH STATION
It is thehardware installedatthecustomers
premises.Ithas againthree units. They are
Outdoor unit Indoor unit
Interlink facility
-
8/9/2019 Vsat Technology for the Rural Upliftment - Copy
7/17
-
8/9/2019 Vsat Technology for the Rural Upliftment - Copy
8/17
SATELLITE(GEO STATIONARY SATELLITE)
A geostationary satellite is anearth-orbiting
satellite,placedatanaltitude ofapproximately 35,800kilometers
(22,300 miles) directly over theequator.
The principal advantage ofthis type of satellite is
thefactthatanearthbounddirectional antennacan beaimedandthen left
in position without furtheradjustment.
Another advantage is the factthat becausehighlydirectional
antennas can be used, interference fromsurface-based sources, and
from other satellites, isminimized.
-
8/9/2019 Vsat Technology for the Rural Upliftment - Copy
9/17
VSAT TOPOLOGIES
Thenetwork of VSATs atdifferent locations
adopts differenttopologies depending onthe
endapplications traffic flow requirements.
Thesetopologies are
Mesh Topology
Star Topology
-
8/9/2019 Vsat Technology for the Rural Upliftment - Copy
10/17
MESH AND STAR TOPOLOGIES
MESH STAR
-
8/9/2019 Vsat Technology for the Rural Upliftment - Copy
11/17
VSAT ACCESS TECHNOLOGIES
The primary objectiveandadvantage ofthesenetworks is to
maximisethe use ofcommonsatelliteand other resources amongstall
VSATsites.
The method by whichthesenetworks optimisethe use of
satellitecapacity, and spectrumutilisation ina
flexibleandcosteffective mannerare referredto as satelliteaccess
schemes.
Each oftheabovetopologies is associated withanappropriate
satelliteaccess scheme. The mostcommonly used satelliteaccess
schemes are:
-
8/9/2019 Vsat Technology for the Rural Upliftment - Copy
12/17
Time Division Multiple Access(TDMA) :
Frequency Division Multiple Access(FDMA) : Code Division
Multiple Access(CDMA)
Demand Assigned Multiple Access(DAMA) :
Frequency-Time Division MultipleAccess(FTDMA)
-
8/9/2019 Vsat Technology for the Rural Upliftment - Copy
13/17
FDMATDMA
-
8/9/2019 Vsat Technology for the Rural Upliftment - Copy
14/17
CDMA DAMA
-
8/9/2019 Vsat Technology for the Rural Upliftment - Copy
15/17
ADVANTAGES OF VSAT
LastMile Problem
Reach
Reliability
Time
NetworkManagement Maintenance
Flexibility
Cost
-
8/9/2019 Vsat Technology for the Rural Upliftment - Copy
16/17
CONCLUSION
With VSAT, dedicateddata,voice,fax,internet, orvideo
conferencing can be provided withaguaranteedavailability exceeding
99.95% in
remoteareas and invillages. Invillages onecanusethis technology
for their progress.
They can usethis technology inthe fields
liketelemedicine,teleeducation, onecaneventhe
lectures from the internet. VSAT networks arenow viewedas the
most
flexible platform inthecommunications.
-
8/9/2019 Vsat Technology for the Rural Upliftment - Copy
17/17
THANK YOU
