Short Distance Short Distance Wireless Communication Wireless Communication
Dec 21, 2015
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
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
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.
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