Introduction to Wireless Sensor Networks



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Military

  • Remote deployment of sensors for tactical monitoring of enemy troop movements.

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
  • Introduction to Wireless Sensor Networks

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
  • Introduction to Wireless Sensor Networks
  • Dense Node Deployment
  • Sensor nodes are usually densely deployed in a fi eld of interest. The number of sensor nodes in a sensor network can be several orders of magnitude higher than that in a MANET.
  • Battery - Powered Sensor Nodes.
  • Sensor nodes are usually powered by battery. In most situations, they are deployed in a harsh or hostile environment, where it is very diffi cult or even impossible to change or recharge the batteries.
  • Severe Energy, Computation, and Storage Constraints.
  • Sensor nodes are highly limited in energy, computation, and storage capacities.
  • Introduction to Wireless Sensor Networks

Self - Confi gurable.

  • Self - Confi gurable.
  • Sensor nodes are usually randomly deployed without careful planning and engineering. Once deployed, sensor nodes have to autonomously configure themselves into a communication network.
  • Application Specific.
  • Sensor networks are application specifi c. A network is usually designed and deployed for a specifi c application. The design requirements of a network change with it’s a.pplication
  • Introduction to Wireless Sensor Networks
  • Unreliable Sensor Nodes.
  • Sensor nodes are usually deployed in harsh or hostile environments and operate without attendance. They are prone to physical damages or failures.
  • Frequent Topology Change.
  • Network topology changes frequently due to node failure, damage, addition, energy depletion, or channel fading.
  • No Global Identifi cation.
  • Due to the large number of sensor nodes, it is usually not possible to build a global addressing scheme for a sensor network because it would introduce a high overhead for the identifi cation maintenance.
  • Introduction to Wireless Sensor Networks

Many - to - One Traffic Pattern.

  • Many - to - One Traffic Pattern.
  • In most sensor network applications, the data sensed by sensor nodes fl ow from multiple source sensor nodes to a particular sink, exhibiting a many to one traffi c pattern.
  • Data Redundancy.
  • In most sensor network applications, sensor nodes are densely deployed in a region of interest and collaborate to accomplish a common sensing task. Thus, the data sensed by multiple sensor nodes typically have a certain level of correlation or redundancy.
  • Introduction to Wireless Sensor Networks

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