Short Distance Wireless Communication

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Short DistanceWireless Communication
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Team 5

• Thomas French
• Jordan Harris
• Mike Symanow
• Luseane Tangataevaha

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Wireless Communication

• Platforms
• Wi-Fi
• Bluetooth
• Zigbee
• WWan
• Concepts
• Advantages / Disadvantages
• Applications

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Wi-Fi

• IEEE 802.11g
• Data Rate Maximum 54
  Mbps
• Product Range up
  to 100 meters
• Operating Frequency 2.4 GHz
• Security
  Password Encryption

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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

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Wi-Fi Applications

• Modem for internet
• Cable
• DSL
• Device to device communication.

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Wi-Fi

• Advantages
• Comparatively higher data transfer rates than
  other similar technologies.
• Low infrastructure
• Wide availability
• Disadvantages
• Cost
• Limited range Restricted to Hot Spots

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Bluetooth

• Open Wireless Protocol, WPAN standard
• Operates ISM band at 2.4-2.4835 GHz
• Uses radio technology called frequency- hopping
  spread
• spectrum
• Modulation - Gaussian Frequency-Shift Key
  Modulation

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Bluetooth

• Frequency- Hopping Spread Spectrum
• Chunks of data transmitted
• Spread-spectrum signals are highly resistant to
  narrowband
• interference
• Difficult to intercept
• Transmissions share a frequency
• band with minimal interference

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Bluetooth

• Data rate up to 1Mb/s 3 Mb/s
• Use in mobile phones, laptops, telephones,
  printers, GPS, video game consoles
• Bluetooth USB dongle must use if computer is
  not Bluetooth enabled

http//en.wikipedia.org/wiki/Bluetooth
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Advantages/Disadvantages

• Advantages
• Wireless, Inexpensive, Automatic
• Low energy and power consumption
• Disadvantages
• Security
• Viruses over the years
• Bluejacking
• Health Concerns (same as mobile phones)

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ZigBee

• High-level communication protocol
• Aim low
• The Name
• Zig-zagging of bees from flower to flower
• Analogous to mesh networking

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ZigBee Applications
Source http//www.zigbee.org/imwp/idms/popups/pop
_download.asp?ContentID7092
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ZigBeeAdvantages

• Extremely low power
• Simple sensor 1 AA gt5 years
• Sleep modes allow decades of use
• Low response time
• Low cost

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ZigBee Disadvantages

• Low data rate
• Bluetooth 3Mbps ZigBee 250kbps
• Low range
• lt35m on average
• Geared towards very specific applications
• Aim low

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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.

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Applications

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

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Operation

• Cell Phone network for data transfer
• WiMAX communication.
• IEEE 802.16 communication standard
• Allows connection continuity between service areas

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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

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Future

• 4G Cell Networks
• Higher network capacity
• 100Mbit/s to 1Gbit/s data transfer rates
• Smoother handoff
• Operational by 2010
• Satelite Communication
• Global internet access
• High transfer rates

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Summary
Design Power Usage Range Data Transfer Ease of Integration Cost
Bluetooth 100mW  100m  3Mbps  Easy  150
 Wi-Fi 50mW  32m-95m  100Mbps  Medium  360
 ZigBee 45mW  lt35m  250Kbps  Difficult  12
 WWan N/A  7km  54Kbps  Difficult  850
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QUESTIONS?