Short DistanceShort DistanceWireless CommunicationWireless Communication

Team 5Team 5

Thomas FrenchThomas French

Jordan HarrisJordan Harris

Mike SymanowMike Symanow

Luseane TangataevahaLuseane Tangataevaha

Wireless Communication

Platforms: Wi-Fi Bluetooth Zigbee WWan

Concepts: Advantages / Disadvantages Applications

Wi-Fi

IEEE 802.11g Data Rate:

Maximum 54 Mbps Product Range:

up to 100 meters Operating Frequency:

2.4 GHz Security:

Password Encryption

Wi-Fi

How It works: Data Transmission/Acquisition

Wired Ethernet connection OFDM

Closely spaced orthogonal sub-carriers. Reduction of attenuation with high frequencies. Facilitates single-frequency networking.

Broadcasting Decoding of the Signal

Wireless Card

Wi-Fi Applications

Modem for internet Cable DSL

Device to device communication.

Wi-Fi

Advantages: Comparatively higher data transfer rates than other

similar technologies. Low infrastructure Wide availability

Disadvantages: Cost Limited range: Restricted to “Hot Spots”

BluetoothBluetooth

Open Wireless Protocol, WPAN Open Wireless Protocol, WPAN standardstandard

Operates ISM band at 2.4-2.4835 GHzOperates ISM band at 2.4-2.4835 GHz Uses radio technology called Uses radio technology called

frequency- hopping spread frequency- hopping spread

spectrumspectrum Modulation - Gaussian Frequency-Modulation - Gaussian Frequency-

Shift Key ModulationShift Key Modulation

BluetoothBluetooth

Frequency- Hopping Spread SpectrumFrequency- Hopping Spread Spectrum Chunks of data transmittedChunks of data transmitted Spread-spectrum signals are highly Spread-spectrum signals are highly

resistant to narrowband resistant to narrowband

interferenceinterference Difficult to interceptDifficult to intercept Transmissions share a frequencyTransmissions share a frequency

band with minimal interferenceband with minimal interference

BluetoothBluetooth

Data rate up to 1Mb/s – 3 Mb/sData rate up to 1Mb/s – 3 Mb/s Use in mobile phones, laptops, Use in mobile phones, laptops,

telephones, printers, GPS, video telephones, printers, GPS, video game consolesgame consoles

Bluetooth USB dongle – must Bluetooth USB dongle – must use if computer is not Bluetooth use if computer is not Bluetooth enabledenabled

http://en.wikipedia.org/wiki/Bluetooth

Advantages/Advantages/DisadvantagesDisadvantages

Advantages:Advantages: Wireless, Inexpensive, AutomaticWireless, Inexpensive, Automatic Low energy and power consumptionLow energy and power consumption

Disadvantages:Disadvantages: SecuritySecurity

Viruses over the yearsViruses over the years BluejackingBluejacking

Health Concerns (same as mobile phones)Health Concerns (same as mobile phones)

ZigBee High-level communication protocol Aim low The Name

Zig-zagging of bees from flower to flower Analogous to mesh networking

ZigBee Applications

Source: http://www.zigbee.org/imwp/idms/popups/pop_download.asp?ContentID=7092

ZigBeeAdvantages

Extremely low power Simple sensor: 1 AA = >5 years Sleep modes allow decades of use

Low response time Low cost

ZigBee Disadvantages

Low data rate Bluetooth = 3Mbps; ZigBee = 250kbps

Low range <35m on average

Geared towards very specific applications

“Aim low”

Wireless Wide Area Network (WWAN)

Wireless communication technology for data exchange over long distances. ~7 miles maximum range. Uses cell phone networks for data exchange.

Applications

Mobile Internet Access Laptop Computers Hand Held Devices (Cell Phones) Net Books

Operation

Cell Phone network for data transfer WiMAX communication. IEEE 802.16 communication standard

Allows connection continuity between service areas

Performance

Current networks are typically 3G Cell Typically 2.5 GHz, 70 Mb/s

Actual data transfer rates depend on range and strength of signal and data formatting.

Limitations Network availability Signal strength

Future

4G Cell Networks4G Cell Networks Higher network capacityHigher network capacity 100Mbit/s to 1Gbit/s data transfer rates100Mbit/s to 1Gbit/s data transfer rates Smoother handoff Smoother handoff Operational by ~2010Operational by ~2010

Satelite CommunicationSatelite Communication Global internet accessGlobal internet access High transfer ratesHigh transfer rates

SummarySummary

DesignPower Usage Range

Data Transfer

Ease of Integration Cost

Bluetooth 100mW  100m  3Mbps  Easy  ~$150

 Wi-Fi 50mW  32m-95m  100Mbps  Medium  ~$360

 ZigBee 45mW  <35m  250Kbps  Difficult  ~$12

 WWan N/A  7km  54Kbps  Difficult  ~$850

QUESTIONS?QUESTIONS?