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Edit Comment Close Premium member Presentation Transcript Broadband Over Power Line: Broadband Over Power Line Submitted By : Veena Radhakrishnan S7 CSEOutline Of The Presentation.: Outline Of The Presentation. What is Broad Band Access? Introduction to BPL. History of BPL How Does it Works? BPL Modems. Method Of Transmission- OFDM Types of BPL Comparison with other technologies. Limitation Current Status Future Scope.What is BroadBand Access?: What is BroadBand Access? ?What is BroadBand Access?: What is BroadBand Access? High Speed Access to Internet. Greater than 128Kbps. Always ON! Simultaneous up-link and down-link communication. Made possible by digital modems. Leading BroadBand Technologies: xDSL, cable, satellite, ISDN digital modem,INTRODUCTION TO BROADBAND OVER POWERLINES : INTRODUCTION TO BROADBAND OVER POWERLINES Broadband alternative for homes & business. Also known as power line carrier, mains communication, power line telecom (PLT), or power line networking (PLN ). Requires no cabling or infrastructure . Cost and speed. Only equipment required: Special modem plugged into electrical receptacle.BRIEF HISTORY OF BPL.: BRIEF HISTORY OF BPL. PLC has been around for quite sometime. BPL began at the end of 1990. The first technique to make use of the power line for control messages was the method - Ripple Control (100-900Hz,10KW) 1950 : at a frequency of 10Hz, 10kW of power, one-way: town lighting, relay remote control. Mid 1980s : beginning of research into the use of the electrical grid to support data transmission, on bands between 5 - 500Khz, always in a one-way direction . 1997: first tests for bidirectional data signal transmission over the electrical supply network and the beginning of research by Ascom (Switzerland) and Norweb (U.K.) 2000 : first tests carried out in France by EDF R&D and AscomENABLING TECHNOLOGY: ENABLING TECHNOLOGY Advanced methods for modulating data signals. Faster Chip set. Digital equipments to amplify signals. Equipments to send or bypass signal through transformers.Slide 8: HOW STUFF WORKS ?? DeltaSlide 10: CT BRIDGE : routes and controls data traffic between the low and medium-voltage lines. CT COUPLER: Couples BPL signal to medium voltage primary lines. BACKHAUL POINT : CT VIEW MANAGEMENT SYSTEM : Network management system that monitors and controls the BPL system.BPL MODEM : BPL MODEM Use specially designed Silicon Chips. Capable of handling PowerLine Noise - through use of specially developed modulation technique & adaptive algorithm. roughly the size of a common power adapter. It plugs into a common wall socket. Ethernet cable running to computer finishes the connection. Wireless versions are also available.METHOD OF TRANSMISSION-OFDM(ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING): METHOD OF TRANSMISSION-OFDM(ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING) Most commonly used Modulation Technique . Another technology used is CDMA. Also called Discrete Multitone Modulation (DMT), is a transmission technique based upon the idea of frequency division multiplexing (FDM) (used in IEEE 802.11a ). Comparison to FDM: Coupling with "Channel Coding“: almost always used in conjunction with channel coding- an error correction technique, to create coded orthogonal FDM or COFDM .OFDM Contd…..: OFDM Contd….. Benefits & Usage: high spectrum efficiency, resistance against multipath interference (particularly in wireless communications), and ease of filtering out noise . has high performance. By combining the OFDM technique with error-correcting codes, adaptive equalization and reconfigurable modulation, Disadvantages of OFDM: suffers from time-variations in the channel, or presence of a carrier frequency offset. tends to have a high peak-to-average power ratio (PAPR) it is necessary to minimize intermodulation between the sub carriers, which would effectively raise the noise floor both in-channel and out of channel. For this reason circuitry must be very linearTYPES OF BPL: TYPES OF BPL Access BPL. Utilize the power distribution network, owned, operated and controlled by an electricity service provider . Use injectors, repeaters and extractors to deliver high-speed broadband services to the end-user .Types Contd..: Types Contd.. 2. In-House BPL Network machines within the building. Utilize electric power lines not owned, operated or controlled by an electricity service provider, such as the electric wiring in a privately owned building. Devices are connected to the in-building wiring and use electrical sockets as access points. designed to provide short-distance communication solutions Product applications include networking and sharing common resources such as printers.Slide 18: ACCESS BPL IN HOUSE BPLCOMPARISON OF POWER LINE COMMUNICATIONS AND OTHER RELEVANT TECHNOLOGIES : COMPARISON OF POWER LINE COMMUNICATIONS AND OTHER RELEVANT TECHNOLOGIES ISDN Cable Modem DSL BPL Transmission media Twisted pair Co axial Cable Twisted pair Electric lines Connection Dedicated Shared Dedicated Shared Availability On demand If cable present Users close to end office Also available to rural customers Capacity 128Kbps 100 times greater than twisted pair 1MbpsDownstream 19 256KbpsUp stream 45MbpsTECHNICAL CHALLENGES: TECHNICAL CHALLENGES Unpredictable Noise Levels on Power Line. Attenuation Problem. Attenuation Problem at Distribution Transformer. Potentially harmful Radio Frequency interference (RFI). High Voltage and Fluctuation corrupt Data. Distribution System.LIMITATIONS: LIMITATIONS Distances : distance between the customers home& supplying sub-station is a factor in the bit rate available to the user. Eq uipment : avg transformer will’t allow the radio frequencies to pass through . Cost: high capacity back bones . Competition : Competition from providers such as DSL and Cable ISPs Security : power lines produce a fair amount of EMI (Electro Magnetic Interference). Government Regulation : regulations for the use of certain technologies that produce EMIWhere Are We Today?: Where Are We Today? 12 – 15 Field tests across the U.S. (At least). No common standard (Yet!). City of Manassas first commercial deployment followed by Cinergy. FCC working on revised rules . But industry can deploy under existing rules. Huge potential for last mile broadband service. Need for more investment dollars and partners.CURRENT STATUS CONTD..: CURRENT STATUS CONTD.. BPL in IRELAND Govt supporting a trail of BPL. The trials are set to take place in Tuam, Co. Galway with the help from the ESB . The trials are set to commence in the next few months with homes, schools and businesses connected to the Internet by way of ESB power lines (PLC).CONTD…: CONTD… BPL in US. FCC to measure interference . FEMA & ARRl expressed concern over unlicensed BPL equipment interfacing with their licensed radio signals. FCC sees BPL as a potential competitor to DSL. Current technologies provide BPL to Cincinnati &Rockville, MaryLand CURRENT Technology- Home Plug -no interference with radio signals Other ISPs- Earth Link -to test BPL leased from Progress EnergyWhat Needs to Happen Next??: What Needs to Happen Next?? Need for franchise & financial partnerships Electric Utility Executives must commit to enterprise models & actively support projects Current roll-outs needs to better publicized Need for “business certainty” environmentFUTURE OF BPL…: FUTURE OF BPL… Following factors determine whether BPL will succeed in broadband market: Standardisation of BPL technology. Cost of BPL. Interference issues needs. The marketing of BPL needs to be performed to a high standard.REFERENCE: REFERENCE www.nwc.com www.currenttechnologie.com www.powerlinecommunication.comSlide 28: THANK YOU You do not have the permission to view this presentation. In order to view it, please contact the author of the presentation.
Broadband-Over-Power-Lines aSGuest93309 Download Post to : URL : Related Presentations : Share Add to Flag Embed Email Send to Blogs and Networks Add to Channel Uploaded from authorPOINT lite Insert YouTube videos in PowerPont slides with aS Desktop Copy embed code: (To copy code, click on the text box) Embed: URL: Thumbnail: WordPress Embed Customize Embed The presentation is successfully added In Your Favorites. Views: 352 Category: Science & Tech.. License: All Rights Reserved Like it (2) Dislike it (0) Added: April 05, 2011 This Presentation is Public Favorites: 2 Presentation Description No description available. Comments Posting comment... By: ravindra50 (9 month(s) ago) nice presentasion Saving..... Post Reply Close Saving..... Edit Comment Close By: jackey01 (13 month(s) ago) this presentation is very good i also presented dis ppt...... thanx it was so good yogesh Saving..... Post Reply Close Saving..... Edit Comment Close Premium member Presentation Transcript Broadband Over Power Line: Broadband Over Power Line Submitted By : Veena Radhakrishnan S7 CSEOutline Of The Presentation.: Outline Of The Presentation. What is Broad Band Access? Introduction to BPL. History of BPL How Does it Works? BPL Modems. Method Of Transmission- OFDM Types of BPL Comparison with other technologies. Limitation Current Status Future Scope.What is BroadBand Access?: What is BroadBand Access? ?What is BroadBand Access?: What is BroadBand Access? High Speed Access to Internet. Greater than 128Kbps. Always ON! Simultaneous up-link and down-link communication. Made possible by digital modems. Leading BroadBand Technologies: xDSL, cable, satellite, ISDN digital modem,INTRODUCTION TO BROADBAND OVER POWERLINES : INTRODUCTION TO BROADBAND OVER POWERLINES Broadband alternative for homes & business. Also known as power line carrier, mains communication, power line telecom (PLT), or power line networking (PLN ). Requires no cabling or infrastructure . Cost and speed. Only equipment required: Special modem plugged into electrical receptacle.BRIEF HISTORY OF BPL.: BRIEF HISTORY OF BPL. PLC has been around for quite sometime. BPL began at the end of 1990. The first technique to make use of the power line for control messages was the method - Ripple Control (100-900Hz,10KW) 1950 : at a frequency of 10Hz, 10kW of power, one-way: town lighting, relay remote control. Mid 1980s : beginning of research into the use of the electrical grid to support data transmission, on bands between 5 - 500Khz, always in a one-way direction . 1997: first tests for bidirectional data signal transmission over the electrical supply network and the beginning of research by Ascom (Switzerland) and Norweb (U.K.) 2000 : first tests carried out in France by EDF R&D and AscomENABLING TECHNOLOGY: ENABLING TECHNOLOGY Advanced methods for modulating data signals. Faster Chip set. Digital equipments to amplify signals. Equipments to send or bypass signal through transformers.Slide 8: HOW STUFF WORKS ?? DeltaSlide 10: CT BRIDGE : routes and controls data traffic between the low and medium-voltage lines. CT COUPLER: Couples BPL signal to medium voltage primary lines. BACKHAUL POINT : CT VIEW MANAGEMENT SYSTEM : Network management system that monitors and controls the BPL system.BPL MODEM : BPL MODEM Use specially designed Silicon Chips. Capable of handling PowerLine Noise - through use of specially developed modulation technique & adaptive algorithm. roughly the size of a common power adapter. It plugs into a common wall socket. Ethernet cable running to computer finishes the connection. Wireless versions are also available.METHOD OF TRANSMISSION-OFDM(ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING): METHOD OF TRANSMISSION-OFDM(ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING) Most commonly used Modulation Technique . Another technology used is CDMA. Also called Discrete Multitone Modulation (DMT), is a transmission technique based upon the idea of frequency division multiplexing (FDM) (used in IEEE 802.11a ). Comparison to FDM: Coupling with "Channel Coding“: almost always used in conjunction with channel coding- an error correction technique, to create coded orthogonal FDM or COFDM .OFDM Contd…..: OFDM Contd….. Benefits & Usage: high spectrum efficiency, resistance against multipath interference (particularly in wireless communications), and ease of filtering out noise . has high performance. By combining the OFDM technique with error-correcting codes, adaptive equalization and reconfigurable modulation, Disadvantages of OFDM: suffers from time-variations in the channel, or presence of a carrier frequency offset. tends to have a high peak-to-average power ratio (PAPR) it is necessary to minimize intermodulation between the sub carriers, which would effectively raise the noise floor both in-channel and out of channel. For this reason circuitry must be very linearTYPES OF BPL: TYPES OF BPL Access BPL. Utilize the power distribution network, owned, operated and controlled by an electricity service provider . Use injectors, repeaters and extractors to deliver high-speed broadband services to the end-user .Types Contd..: Types Contd.. 2. In-House BPL Network machines within the building. Utilize electric power lines not owned, operated or controlled by an electricity service provider, such as the electric wiring in a privately owned building. Devices are connected to the in-building wiring and use electrical sockets as access points. designed to provide short-distance communication solutions Product applications include networking and sharing common resources such as printers.Slide 18: ACCESS BPL IN HOUSE BPLCOMPARISON OF POWER LINE COMMUNICATIONS AND OTHER RELEVANT TECHNOLOGIES : COMPARISON OF POWER LINE COMMUNICATIONS AND OTHER RELEVANT TECHNOLOGIES ISDN Cable Modem DSL BPL Transmission media Twisted pair Co axial Cable Twisted pair Electric lines Connection Dedicated Shared Dedicated Shared Availability On demand If cable present Users close to end office Also available to rural customers Capacity 128Kbps 100 times greater than twisted pair 1MbpsDownstream 19 256KbpsUp stream 45MbpsTECHNICAL CHALLENGES: TECHNICAL CHALLENGES Unpredictable Noise Levels on Power Line. Attenuation Problem. Attenuation Problem at Distribution Transformer. Potentially harmful Radio Frequency interference (RFI). High Voltage and Fluctuation corrupt Data. Distribution System.LIMITATIONS: LIMITATIONS Distances : distance between the customers home& supplying sub-station is a factor in the bit rate available to the user. Eq uipment : avg transformer will’t allow the radio frequencies to pass through . Cost: high capacity back bones . Competition : Competition from providers such as DSL and Cable ISPs Security : power lines produce a fair amount of EMI (Electro Magnetic Interference). Government Regulation : regulations for the use of certain technologies that produce EMIWhere Are We Today?: Where Are We Today? 12 – 15 Field tests across the U.S. (At least). No common standard (Yet!). City of Manassas first commercial deployment followed by Cinergy. FCC working on revised rules . But industry can deploy under existing rules. Huge potential for last mile broadband service. Need for more investment dollars and partners.CURRENT STATUS CONTD..: CURRENT STATUS CONTD.. BPL in IRELAND Govt supporting a trail of BPL. The trials are set to take place in Tuam, Co. Galway with the help from the ESB . The trials are set to commence in the next few months with homes, schools and businesses connected to the Internet by way of ESB power lines (PLC).CONTD…: CONTD… BPL in US. FCC to measure interference . FEMA & ARRl expressed concern over unlicensed BPL equipment interfacing with their licensed radio signals. FCC sees BPL as a potential competitor to DSL. Current technologies provide BPL to Cincinnati &Rockville, MaryLand CURRENT Technology- Home Plug -no interference with radio signals Other ISPs- Earth Link -to test BPL leased from Progress EnergyWhat Needs to Happen Next??: What Needs to Happen Next?? Need for franchise & financial partnerships Electric Utility Executives must commit to enterprise models & actively support projects Current roll-outs needs to better publicized Need for “business certainty” environmentFUTURE OF BPL…: FUTURE OF BPL… Following factors determine whether BPL will succeed in broadband market: Standardisation of BPL technology. Cost of BPL. Interference issues needs. The marketing of BPL needs to be performed to a high standard.REFERENCE: REFERENCE www.nwc.com www.currenttechnologie.com www.powerlinecommunication.comSlide 28: THANK YOU