Mobile Networks
Module G – Wireless Sensor Networks
J.-P. Hubaux and J. Panchard
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Outline
What technology for what applications?
WSNs characteristics and design
issues, with special focus on:
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Power management
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Reliable data collection
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Hybrid architectures
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Time Synchronization
Conclusion
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The Internet revolution was about people
wanting to talk to each other.
Now we realize that things have much to
tell as well.
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Earthquake detection
The occurrence of an earthquake can be detected automatically
by accelerometers.
Earthquake speed: around 5-10km/s
If the epicenter of an earthquake is in an unpopulated area
200km from a city center, an instantaneous detection system
can give a warning up to 30 seconds before the shockwave hits
the city.
If a proper municipal actuation network is in place:
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Sirens go off
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Traffic lights go to red
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Elevators open at the nearest floor
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Pipeline valves are shut
Even with a warning of a few seconds,
the effects of the earthquake can be
mitigated.
Similar concept can be applied to
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Forest fire
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Landslides
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Etc.
Motivation
Ref: RagavSZ06
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Cold Chain Management
Supermarket chains need to track the storage temperature of
perishable goods in their warehouses and stores.
Tens if not hundreds of fridges should be monitored in real-time
Whenever the temperature of a monitored item goes above a
threshold
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An alarm is raised and an attendant is warned (pager, SMS)
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The refrigeration system is turned on
History of data is kept in the system for
legal purpose
Similar concept can be applied to
pressure and temperature monitoring in
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Production chains
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Containers
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Pipelines
Motivation
Ref: http://www.ip01.com