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First introduction to wireless sensor networks

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A first introduction to wireless sensor networks.

A first introduction to wireless sensor networks.

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  • 1. A First Introduction toWireless Sensor Networks
    Aparna S Balan
    Vidya Academy of Science and Technology,
    Thrissur -680 501, India
    16 July 2010
  • 2. Wireless Sensor Networks
    • Number of sensors spread across a geographical area.
    • 3. Each sensor has
    • 4. wireless communication capability
    • 5. some level of intelligence
  • 6.
  • 7. K
    C
    A
    D
    B
    E
    H
    I
    J
    Sink
  • 8. Schematic of Node
    Power
    Signal
    Processor
    Wireless Transmitter/ Receiver
    Processing And Decision Making
    Sensors
    Control
  • 9. Classification of Sensor Networks
    • Proactive
    • 10. provides the snapshot of the relevant parameters at regular intervals
    • 11. Reactive
    • 12. nodes react immediately to the events
  • Protocols for Sensor Networks
    • To avoid collision at a time only one node will transmit
    • 13. Static channel allocation
    • 14. If N node, bandwidth is divided into N equal partitions
    • 15. Dynamic channel allocation
    • 16. No fixed assignment of bandwidth
  • Protocols for Sensor Networks
  • Base Station
    Second Level Cluster Head
    First Level Cluster Head
    Simple Sensor Nodes
  • 21. Goal of WSN
    • Determine value of some parameters
    • 22. Detect the occurrence of events
    • 23. Classify a detected object
    • 24. Track an object
  • WSN requirements
    • Large number of sensors
    • 25. Low energy use
    • 26. Network self-organization
    • 27. Collaborative signal processing
    • 28. Querying ability
  • Applications
    • Defense Application
    • 29. Crisis-Management Applications
    • 30. Detect Environmental changes
    • 31. Motor Vehicle traffic monitoring
  • Thanks …

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