Successfully reported this slideshow.
We use your LinkedIn profile and activity data to personalize ads and to show you more relevant ads. You can change your ad preferences anytime.
Real-Time and Reliable WSNsfor Smart Wireless Automation Applications<br />Maurizio Bocca, M.Sc.<br />Department of Automa...
1<br />WSNs Applications<br />Maurizio Bocca - Automaatio XIX, Helsinki, 16.3.2011<br />
Wireless Automation Challenges<br />Energy efficiency:<br />Guarantee an extended lifetime of the system<br />Scalability:...
Outline<br />3<br />TSMP-Lite Initialization<br />RNP Protocol<br />Device-Free Tracking<br />Maurizio Bocca - Automaatio ...
TSMP-Lite Initialization<br />TSMP-Lite: Time Synchronized Mesh Protocol for WSNs applications<br />Network initialization...
Case Study: Industrial Environment<br />5<br />Maurizio Bocca - Automaatio XIX, Helsinki, 16.3.2011<br />
Case Study: Greenhouse<br />6<br />Maurizio Bocca - Automaatio XIX, Helsinki, 16.3.2011<br />
Real-Time Networking Protocol<br />Mesh networking based on nodes cooperation:<br />Transmission in broadcast mode based o...
RNP MAC and PHY Layers<br />TDMA and CSMA hybrid channel access:<br />TDMA to control delays and introduce determinism<br ...
Case Study: Industrial Environment<br />9<br />NO antenna diversity<br />WITH antenna diversity<br />Maurizio Bocca - Auto...
Device-Free Tracking<br />A person crossing a LoS link between two nodes causes shadowing of the radio signal<br />Movemen...
DF Tracking Performance (1/2)<br />Alarm notifications received from the network processed at the sink<br />Tracking perfo...
DF Tracking Performance (2/2)<br />Distributed RSSI processing reduces the communication overhead<br />Alarm notifications...
Conclusions<br />The use of WSNs in industrial environment brings several advantages:<br />Possibility to deploy a high nu...
A Look at the Future<br />14<br />“The Economist”<br />December 2010<br />Maurizio Bocca - Automaatio XIX, Helsinki, 16.3....
Thank You!<br />15<br />Questions?<br />maurizio.bocca@tkk.fi<br />http://autsys.tkk.fi/MaurizioBocca<br />
Upcoming SlideShare
Loading in …5
×

Real-Time and Reliable Wireless Sensor Networks for Smart Wireless Automation Applications

1,627 views

Published on

Published in: Technology, Business
  • Be the first to comment

Real-Time and Reliable Wireless Sensor Networks for Smart Wireless Automation Applications

  1. 1. Real-Time and Reliable WSNsfor Smart Wireless Automation Applications<br />Maurizio Bocca, M.Sc.<br />Department of Automation and Systems Technology<br />Aalto University School of Electrical Engineering<br />www.wsn.tkk.fi<br />
  2. 2. 1<br />WSNs Applications<br />Maurizio Bocca - Automaatio XIX, Helsinki, 16.3.2011<br />
  3. 3. Wireless Automation Challenges<br />Energy efficiency:<br />Guarantee an extended lifetime of the system<br />Scalability:<br />Cope with a large and varying number of nodes<br />Reliability:<br />Packets must arrive at destination<br />Timeliness:<br />Fulfill the deadlines of the monitored industrial processes<br />2<br />Maurizio Bocca - Automaatio XIX, Helsinki, 16.3.2011<br />
  4. 4. Outline<br />3<br />TSMP-Lite Initialization<br />RNP Protocol<br />Device-Free Tracking<br />Maurizio Bocca - Automaatio XIX, Helsinki, 16.3.2011<br />
  5. 5. TSMP-Lite Initialization<br />TSMP-Lite: Time Synchronized Mesh Protocol for WSNs applications<br />Network initialization procedure:<br />Neighbors discovery and connectivity graph<br />Useful to adjust the routes in case of nodes failures<br />Link quality evaluation and topology definition<br />High-accuracy time synchronization<br />For energy-efficient multi-channel time-slotted communications<br />4<br />Maurizio Bocca - Automaatio XIX, Helsinki, 16.3.2011<br />
  6. 6. Case Study: Industrial Environment<br />5<br />Maurizio Bocca - Automaatio XIX, Helsinki, 16.3.2011<br />
  7. 7. Case Study: Greenhouse<br />6<br />Maurizio Bocca - Automaatio XIX, Helsinki, 16.3.2011<br />
  8. 8. Real-Time Networking Protocol<br />Mesh networking based on nodes cooperation:<br />Transmission in broadcast mode based on network status<br />Packet forwarding over multiple hops by pyggybacking<br />Redundant paths to be utilized when required<br />Base for reliable wireless data transfer<br />7<br />Network status related information<br />Maurizio Bocca - Automaatio XIX, Helsinki, 16.3.2011<br />
  9. 9. RNP MAC and PHY Layers<br />TDMA and CSMA hybrid channel access:<br />TDMA to control delays and introduce determinism<br />CSMA for avoiding collisions and improving coexistance with other systems<br />Antenna diversity:<br />Additional redundancy at the physical layer<br />Reduces link failures and need for retransmissions<br />Improves reliability and decreases latency<br />8<br />Maurizio Bocca - Automaatio XIX, Helsinki, 16.3.2011<br />
  10. 10. Case Study: Industrial Environment<br />9<br />NO antenna diversity<br />WITH antenna diversity<br />Maurizio Bocca - Automaatio XIX, Helsinki, 16.3.2011<br />
  11. 11. Device-Free Tracking<br />A person crossing a LoS link between two nodes causes shadowing of the radio signal<br />Movement in the close proximity of the nodes causes multipath fading<br />Distributed processing of the RSSI:<br />RSSI signals are processed locally in the nodes to detect significant changes<br />The nodes transmit to the sink only information concerning significant events<br />High-accuracy time synchronization<br />10<br />Maurizio Bocca - Automaatio XIX, Helsinki, 16.3.2011<br />
  12. 12. DF Tracking Performance (1/2)<br />Alarm notifications received from the network processed at the sink<br />Tracking performance improved by applying a Kalman filter<br />Experimental setup:<br />12 nodes covering 36 m2<br />Average error: 0.17 m<br />11<br />Maurizio Bocca - Automaatio XIX, Helsinki, 16.3.2011<br />
  13. 13. DF Tracking Performance (2/2)<br />Distributed RSSI processing reduces the communication overhead<br />Alarm notifications account only for 7.18 % of the total number of broadcasts<br />Through time synchronization, the radio is enabled for:<br />TX slot: 2.30 ms<br />RX slot: 4.05 ms<br />Extended system lifetime<br />12<br />Maurizio Bocca - Automaatio XIX, Helsinki, 16.3.2011<br />
  14. 14. Conclusions<br />The use of WSNs in industrial environment brings several advantages:<br />Possibility to deploy a high number of sensors/actuators at a reduced cost<br />Improved screening capability<br />Reduction of installation time and costs<br />Ease of maintenance<br />Industrial applications are expected to increase significantly in number over the next years<br />13<br />Maurizio Bocca - Automaatio XIX, Helsinki, 16.3.2011<br />
  15. 15. A Look at the Future<br />14<br />“The Economist”<br />December 2010<br />Maurizio Bocca - Automaatio XIX, Helsinki, 16.3.2011<br />
  16. 16. Thank You!<br />15<br />Questions?<br />maurizio.bocca@tkk.fi<br />http://autsys.tkk.fi/MaurizioBocca<br />

×