BPL by kishorkna

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									       SEMINAR ON
BROADBAND OVER POWERLINES

            presented by
            Gyana Ranjan Sethi
            Electrical Engg
            Roll no-403022
            Regd no-04199ty01857
Topics to be discussed…

   What is BPL ?
   Types of BPL Service.
   The operation.
   BPL Modems.
   Advantages
   limitations
   Challenges.
What is BPL ?

   An emerging technology in the
    competitive world of broadband
    Internet service offering high-
    speed access to your home
    through the most unlikely path: a
    common electrical outlet.
   Combines technological principles
    of radio, wireless networking, and
    modems.
What is BPL ?(contd..)

   Data sent over power lines into homes at
    speeds between 500 kilobits and 3 megabits
    per second (equivalent to DSL and cable).
   BPL is already being tested in several cities
    around the United States and the United
    Kingdom.
   Developed by current communications group
    and Enikia.
Types of BPL Service.


 In-House   BPL

 Access   BPL
The big idea

   Idea is to transfer data using AC.
   RF is bundled with current without the need
    of separate data line.
   Used by Electrical companies to monitor
    performance of power grids.
   There are even networking solutions
    available today that transfer data using the
    electrical wiring in a home or business.
             Operation

Power transmission
Operation (contd..)
Different parts of operation


   REPEATER
   CT COUPLER
   CT BRIDGE
The whole operation (contd..)

1. REPEATERS:
   The repeaters are special devices that take
   in the data and repeat it in a new
   transmission, amplifying it for the next leg of
   the journey.
2. CT COUPLER:
   The CT Coupler is a device that allows the
   data on the line to bypass transformers.
Operation (contd..)

3. CT BRIDGE:
   It is the device capable of carry the signal
   with the electricity on the power line as well
   as putting wireless links on the poles and
   sending the data wirelessly into homes.
Other Functions of CT Coupler

   Manage symmetric data transmission
   Manage subscriber information
    Support security encryption of all
    transmissions
BPL MODEMS

   use silicon chips
    designed to send
    signals over electric
    power lines.
   Capable of handling
    powerline noise on a
    wide spectrums
BPL Modems
OVER ALL VIEW OF WORKING OF
B.P.L
advantages

   it is enexpensive
   It required no new wiring
   The network add no cost on your electric bills
   Cheapest method of connecting computers
    in differenet rooms
   It is fast rated at 14 megabits per second
   Acessing internet in rural areas
limitations

   BPL tends to generate much radio
    interference over the utility lines it runs .
   the costs for utility companies to prepare
    their grids to support BPL can be high.
   BPL Affecting VHF/UHF Public Safety Frequencies
Challenges

   Problem of INTERFERENCE
    The bandwidth needed for BPL directly
    interferes with ham radio and short-wave
    radio transmissions. Developers of BPL say
    that these interference issues have been
    solved. Only tests and time will tell. Until
    then, the advancement of BPL moves
    forward slowly as it waits for standards and
    logistics to be decided by regulating bodies.
Conclusion

   The potential of this new technology is
    exciting and its prospects are very bright. By
    providing high-speed data transmission
    between all of the electrical plugs in a house,
    there is the potential to network all kinds of
    common appliances in a household.

								
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