Sensor networks
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Sensor networks Sensor networks Presentation Transcript

  • SummaryIntroduction 1. Sensor Networks 2. Architecture 3. Application Domain 4. Protocol Conclusion 2/24
  • Introduction It was noted that routing data from one sensor to the central controller required a costly and cumbersome cabling The progress made in microelectronics and wireless communication technologies, have produced a reasonable cost components called micro-sensors The deployment of several micro-sensors to collect and transmit environmental data to one or more collection points, is a network of wireless sensors. 3/24
  • SummaryIntroduction 1. Sensor Networks 2. Architecture 3. Application Domain 4. Protocol Conclusion 2/24
  • What’s a Wireless Sensor networks ? A special Capture andtype of ad transmit hoc environmentalnetworks data autonomously A large number of micro- sensors 5/24
  • What’s the environmental data? Temperature PressureLuminosity Environmental data sound vibration 6/24
  • How it works the sensor networksPhase 1 Phase 2 Phase 3The data are Routing data Thiscaptured by through a collection ofdifferent multi-hop to a "skin" isnodes. collection connected to point called the user via “sink”. web or satellite 7/24
  • SummaryIntroduction 1. Sensor Networks 2. Architecture 3. Application Domain 4. Protocol Conclusion 2/24
  • Architecture of a Sensor Network(1/2) 9/24
  • Architecture of a Sensor Network(2/2) 10/24
  • Architecture of a mote
  • Architecture of a mote The Control Unit of Energy The Transmission Unit The Processing Unit The Control Unit 12/24
  • Architecture of a micro-sensor (1/2) The capture unit : generally composed of two sub-units: the sensor and an Analog / Digital. The sensor is responsible for providing analog signals based on the phenomenon observed in Analog / Digital. This converts the signals into a digital signal understood by the processing unit. The processing unit :includes a processor generally associated with a small storage unit and works using an operating system designed for micro- sensors. This unit is responsible for implementing the communications protocols that allow the node to collaborate with other network nodes. It can also analyze data collected to reduce the workload of the node wells. 13/24
  • Architecture of a micro-sensor (2/2) The transmission unit : This unit is responsible for conducting all transmitting and receiving data over a wireless medium. It can be either optical or radio-frequency type. The control unit of Energy : She is responsible for distributing the energy available to other modules and reduce expenses by pausing the active components for example. This unit can also handle systems of charging energy from the observed environment such as solar cells, to extend the total lifetime of the network. 14/24
  • SummaryIntroduction 1. Sensor Networks 2. Architecture 3. Application Domain 4. Protocol Conclusion 15/24
  • Applications Domain Detect movements of the •Report a possible earth to predict earthquake outbreak of fire Location of •Detect dry areascombatants, vehicles 2:Securityand weapons on the application 3:Environmen battlefield tal application 1: Military 4:Medical applications Application 5:Commercial application It may be used to monitor patients from a Facilitate stock distance management www.them egallery.co 16/24
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  • SummaryIntroduction 1. Sensor Networks 2. Architecture 3. Application Domain 4. Protocol Conclusion 19/24
  • Protocol The protocol exploited in wireless sensor networks is Zigbee: ZigBee is a protocol for high-level communications of small radio stations (with reduced consumption), based on the IEEE 802.15.4 networks for personal dimension (Wireless Personal Area Networks: WPAN). We find this protocol in "embedded systems" where consumption is a criterion of selection. It is known by his reduced consumption. 20/24
  • ZigBee stackThe ZigBeeapplication layer The NWK layer has beenconsists of layers designed to allow thesublayer Application network to expand withSupport (APS), transmitters at low powerZigBee Device Object consumption and to manage(ZDO) and the a large number of nodes withApplication a very low latency.Framework definedby the manufacturers. The MAC (Media Access Control) has been designed to integrate multiple topologies without complexity. The PHY layer has been designed for high integration needs at low cost. 21/24
  • SummaryIntroduction 1. Sensor Networks 2. Architecture 3. Application Domain 4. Protocol Conclusion 22/24
  • Conclusion A problem related to the location is the placement of nodes in a sensor network, that mean how to position the nodes to each other. With the new technology, it has found the best way to improve the environment. 23/24
  • Thank you for your attention LOGO