Realities in Wireless Sensor Networks

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Realities inWireless Sensor Networks
Jack Stankovic

University of Virginia
October 17, 2005
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Address Rugged Environmental Realities

• Wireless communications
• Irregular communication ranges (link quality)
• Interference Ranges
• Even if logical collision, message may still get
  through
• Communications Quality Dynamics
• Operate in Presence of a Crowded Spectrum
• Sensing
• In-field Calibration
• Wake-up times
• False alarms
• Objects can prevent communication

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Reality - Radio Irregularity
Radio Communication Range
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Solutions

• Explicitly address
• Asymmetric detection protocol in VigilNet
• SGF Symmetric Geographic Forwarding
• Implicitly Overcome
• Bound neighbor distance

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Turn-Key WSN Systems

• Self-
• Self-organize
• Self-monitor
• Self-heal (to a degree)
• Self-calibrate
• Sensing
• Communications
• Self-tune (continuously)