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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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### Transcript of "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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