Sensor Based Network


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Sensor Based Network

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Sensor Based Network

  2. 2.  Presented By: Saqib Naveed 07010656-071 2
  3. 3. Introduction A sensor network is composed of a large number of sensor nodes, which are densely deployed either inside the phenomenon or very close to it. Random deployment Cooperative capabilities 3
  4. 4. Applications of sensornetworks temperature humidity vehicular movement lightning condition pressure soil makeup noise levels the presence or absence of certain kinds of objects mechanical stress levels on attached objects the current characteristics such as speed, direction, and size of an object 4
  5. 5. Applications of sensornetworksMilitary applications Monitoring friendly forces, equipment and ammunition Battlefield surveillance Reconnaissance of opposing forces and terrain Battle damage assessment Nuclear, biological and chemical attack detection and reconnaissance 5
  6. 6. Applications of sensornetworksEnvironmental applications Forest fire detection Flood detection Precision agriculture 6
  7. 7. Applications of sensornetworksHealth applications Telemonitoring of human physiological data Tracking and monitoring patients and doctors inside a hospital Drug administration in hospitals 7
  8. 8. Applications of sensornetworksHome applications Home automation Smart environment 8
  9. 9. Applications of sensornetworksOther commercial applications Environmental control in office buildings Interactive museums Managing inventory control Vehicle tracking and detection Detecting and monitoring car thefts 9
  10. 10. Factors influencing sensor network designFault tolerance Fault tolerance is the ability to sustain sensor network functionalities without any interruption due to sensor node failures. The fault tolerance level depends on the application of the sensor networks. 10
  11. 11. Factors influencing sensornetwork designScalability Scalability measures the density of the sensor nodes. Density =  =(N R (R) 2)/A 11
  12. 12. Factors influencing sensornetwork designProduction costs The cost of a single node is very important to justify the overall cost of the networks. The cost of a sensor node is a very challenging issue given the amount of functionalities with a price of much less than a dollar. 12
  13. 13. Factors influencing sensornetwork design Hardware constraints 13
  14. 14. Factors influencing sensornetwork designPower consumption Sensing Communication Data processing 14
  15. 15. Communication architectureof sensor networks 15
  16. 16. Communication architectureof sensor networks 16
  17. 17. Communication architectureof sensor networksApplication layer The three possible application layer protocols are - Sensor management protocol (SMP) Task assignment and data advertisement protocol (TADAP) Sensor query and data dissemination protocol (SQDDP) 17
  18. 18. Communication architectureof sensor networksTransport layer This layer is especially needed when the system is planned to be accessed through Internet or other external networks. No attempt thus far to propose a scheme or to discuss the issues related to the transport layer of a sensor network in literature. 18
  19. 19. Communication architecture of sensor networksNetwork layer Power efficiency is always an important consideration. Data aggregation is useful only when it does not hinder the collaborative effort of the sensor nodes. An ideal sensor network has attribute-based addressing and location awareness. 19
  20. 20. Communication architectureof sensor networksData link layerThe data link layer is responsible for the medium access and error control. It ensures reliable point-to-point and point-to- multipoint connections in a communication network. 20
  21. 21. Communication architectureof sensor networksMedium access control Creation of the network infrastructure Fairly and efficiently share communication resources between sensor nodes 21
  22. 22. Communication architectureof sensor networksError control Forward Error Correction (FEC) Automatic Repeat Request (ARQ). Simple error control codes with low- complexity encoding and decoding might present the best solutions for sensor networks. 22
  23. 23. Communication architectureof sensor networksPhysical layer The physical layer is responsible for frequency selection, frequency generation, signal detection, modulation and data encryption. 23
  24. 24. Thank You Alls….. 24