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Wireless sensor networks


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Wireless Sensor Networks (WSN)

Wireless Sensor Networks (WSN)

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  • 1. Wireless Sensor Networks zaahir salam
  • 2. Contents – Basic Introduction to Communication Network – Basic Network Topologies – WSN Concept – A Commercial Sensor Node – Sensor Network – Comparision Between a PC and Sensor Mote – Working of a Sensor Node – Some Real Time Applications – References
  • 3. Communication Network • A communication network is composed of nodes, each of which has computing power transmit and receive messages over communication links, wireless or cabled.
  • 4. Basic Network Topologies Star Topology Ring Topology Bus Topology Tree Topology
  • 5. Fully Connected Networks Mesh Networks Mesh nets can be good models for large-scale networks of wireless sensors that are distributed over a geographic region.
  • 6. Each node consists of Wireless Sensor Networks are networks that consists of sensors which are distributed in an ad hoc manner. These sensors work with each other to sense some physical phenomenon and then the information gathered is processed to get relevant results. WSN
  • 7. Basic Structure
  • 8. A single network may consist of several interconnected subnets of different topologies. A WSN is a wireless network consisting of spatially distributed autonomous devices using sensors to cooperatively monitor physical or environmental conditions, such as temperature, sound, vibration, pressure, motion or pollutants, at different locations.
  • 9. Sensor Node
  • 10. Sensor Network Interface electronics, radio and microcontrollerSoil moisture probe Mote Antenna Gateway Server Internet Communications barrier Sensor field
  • 11. The flowing of data ends at special nodes called base stations (sometimes referred to as sinks). A base station links the sensor network to another network (like a gateway) to disseminate the data sensed for further processing.
  • 12. Base stations have enhanced capabilities over simple sensor nodes since they must do complex data processing. Base stations have • workstation/laptop class processors, • enough memory, • energy, storage • computational power
  • 13. Computer Revolution 0.5 oz, 2.25 x 1.25 x 0.25 inch 25 lb, 19.5 x 5.5 x 16 inch ~14 mW~ 64 W ~ $35~ $6K (today) 512 KB Flash160 KB Floppies 128 KB RAM16-256 KB RAM 4 MHz4.77 MHz MICAZ Mote (2005)Original IBM PC (1981)
  • 14. Sensor Network Gateway Server Internet Sensor field Watershed
  • 15. Applications of WSN
  • 16. Military Military uses sensor networks for battlefield surveillance; sensors could monitor vehicular traffic, track the position of the enemy. .
  • 17. Smart Home / Smart Office Sensors controlling appliances and electrical devices in the house. Better lighting and heating in office buildings. The Pentagon building has used sensors extensively
  • 18. Traffic Management & Monitoring  Future cars could use wireless sensors to:  Handle Accidents  Handle Thefts Sensors embedded in the roads to: –Monitor traffic flows –Provide real-time route updates
  • 19. Biomedical / Medical • Health Monitors – Glucose – Heart rate – Cancer detection • Chronic Diseases – Artificial retina – Cochlear implants • Hospital Sensors – Monitor vital signs – Record anomalies
  • 20. Industrial & Commercial Numerous industrial and Commercial applications: -Agricultural Crop Conditions -Inventory Tracking -In-Process Parts Tracking -Automated Problem Reporting -RFID – Theft Deterrent and Customer Tracing -Plant Equipment Maintenance Monitoring
  • 21. References rial/WSN-future.ppt
  • 22. THANK YOU