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First introduction to wireless sensor networks

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A first introduction to wireless sensor networks.

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First introduction to wireless sensor networks

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

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