BROADBAND POWERLINE COMMUNICATION

NETWORK ANALYSIS

MADE BY:SMRITI TIKOOMTECH- 1ST YR

14-ECP-015

Contents Introduction BPL Working Why BPL Applications Software used WIRESHARK Uses of WIRESHARK Features Limitation of Wireshark Drawbacks Conclusion References

Introduction…..Broadband wireless communication: high speed internet access.Originally broadband - technical term but

became a marketing term . Increase in demand for BWC .Led to development with high growth rate. Bottleneck for telecom.- “last mile

connectivity to end users”.Gave birth to- “BPL”.

BPL

Broadband Power line Communication or broadband over power line.

High speed digital transmission over public electric power distribution wiring.

High frequencies used, wider frequency range.2- 34 MHz . High rate communication over long distances.Prone to interference as frequencies – a part of

radio spectrum allocated to over air communication services.

More about BPL Uses OFDM. Also uses adaptive modulation . Duplexing schemes used: FDD( Frequency division Duplexing). TDD(Time division duplexing). BPL stds. IEEE 1901 std: usable by all classes of BPL devices G.hn: defines networking over power lines, phone lines,

coaxial cables for home networking applications. BPL - type of PLC. PLC –carry data on conductor -simultaneously used for

AC electric power transmission/distribution to consumers.

Working of BPLMain components: “ Head End”, “ Repeaters”,

CPE’s”.Head end: injects BW from telecom provider’s

pt of presence to utility lines as RF data.Repeater: placed at intermediate points for

amplification of RF signals as it dies down.CPE’s: placed at user location for converting

RF data to BW for ultimate connection to user PC.

For connection of Head End and Repeaters to power lines suitable external couplers required (capacitive or inductive).

Continued…….

For CPE’s couplers are internal to the equipment .

CPE’s: “Customer Premises Equipment”A portable device – plugged into any of the

AC electrical outlets.Thus provides- “Plug and Play” broadband

at home.

Why BPLBPL - carries data on the existing power lines -

providers of electricity to households . Providing data access to remote regions .Remote areas not suitable for fiber optic networks.BPL offers- a) benefit over regular cable modem or

DSL.b) Hardly any investment on infrastructure and

equipment .c ) uses carrier frequencies in parallel – to spread data

over wide range of frequencies.d) communication less vulnerable to nulls or

interference from noise or any other devices.

Applications• In house applications: occur within a single

building - both ends of communication link within the building. Building – can be a house / apartment block /office building.

• Path over which transfer of data occurs- is less than 100 m between devices.

• Last –mile applications :connection to home or office of internet via broadband service suppliers.

• In addition to broadband internet connections -also provide voice-IP telephony, video-VHS video quality, surveillance systems, entertainment- gaming , electric metering.

Software usedThe software used to compare the

various network parameters of the different sites using BPL system is wire shark.

Wire shark – a GUI network packet analyzer.

Displays the packet and its details .

Wireshark• Wire shark -------- network packet analyzer.• A network packet analyzer will capture network

packets and display that packet data as detailed as possible.

• You could think of a network packet analyzer as a measuring device used to examine what's going on inside a network cable, just like a voltmeter is used by an electrician to examine what's going on inside an electric cable (but at a higher level, of course).

• Wire shark is perhaps one of the best open source packet analyzers available today.

Use of Wire shark• Network administrators use it to troubleshoot

network problems .• Network security engineers use it to examine

security problems .• Developers use it to debug protocol

implementations .• People use it to learn network protocol

internals.

Features • Available for UNIX and Windows.• Capture live packet data from a network interface. • Open files containing packet data captured with tcp dump /Win

Dump, Wire shark, and a number of other packet capture programs. • Import packets from text files containing hex dumps of packet data. • Display packets with very detailed protocol information. • Save packet data captured. • Export some or all packets in a number of capture file formats. • Filter packets on many criteria.• Search for packets on many criteria.• Colorize packet display based on filters.• Create various statistics.• ... and a lot more

TCP-Protocol Data

Capture Filter Profile

Time Date Format

Info about TCP endpoints

Graph Analysis

MAC addresses

Address names

Protocol Hierarchy Statistics

Limitation of the network/software• Although using Wireshark helps in managing

the network parameters but it can’t prevent the damages caused by the equipments used in networks . It can only monitor the losses in packets and enlist the movement of protocol specific data .

Drawbacks Power lines- inherently posses noisy environment. Switching power supplies- noisy harmonics in power line. Power system design philosophy – plays major role in

deployment of BPL. e.g. -USA and Europe. Power distribution – step down transformers- reduce voltage

– for used by customers. BPL signals can’t readily pass thru transformers – as high inductance makes them behave – low pass filters Blocking high frequency signals- so Repeaters to be attached

to transformers. No of repeaters to be deployed may vary – based on design

philosophy. Electro magnetic compatibility – a major issue.

Conclusion….• Possible way to provide- last mile

broadband connectivity – to internet users – requiring high BW.

• Prospects of satisfactory deployment- semi urban and rural sectors.

• BPL tech. – to progress – can assist utility org.- with intelligent capabilities in electric network.

• Resulting – improved efficiency in – energy management.

References

• Broadband power line communication an Indian experience , 2011 IEEE International symposium on PLC and its applications.

• en.Wikipedia.org/wiki/Broadband _ over_ power_ lines.

• en .Wikipedia. org/wiki/Power-line_ communication.

• Broadband power line communication systems – a background brief by Australian communications authority.

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