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Deployment Analysis in Underwater Acoustic Wireless Sensor Networks

Deployment Analysis in Underwater Acoustic Wireless Sensor Networks. Dario Pompili , Tommaso Melodia , lan F. Akyildiz ACM WUWNet’06 2008. 12. 9. Ahn Jung-Sang. Content. Introduction Communication Architectures Deployment Strategies in 2D Deployment Strategies in 3D Conclusion.

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Deployment Analysis in Underwater Acoustic Wireless Sensor Networks

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  1. Deployment Analysis in Underwater Acoustic Wireless Sensor Networks Dario Pompili, TommasoMelodia, lan F. Akyildiz ACM WUWNet’06 2008. 12. 9. Ahn Jung-Sang

  2. Content • Introduction • Communication Architectures • Deployment Strategies in 2D • Deployment Strategies in 3D • Conclusion

  3. Introduction • Underwater Acoustic Sensor Network (UW-ASN) • Challenges • Harsh environment • Limited bandwidth • High & variable propagation delay, error rates • Etc. • This Paper • Propose a mathematical & hydrodynamics model in 2D • Considering depth, current, and so on. • Determine the minimum number of sensors • Provide guidelines on how to choose the optimal deployment • And extend this 3D briefly

  4. Communication Architectures • 2D Architecture

  5. Communication Architectures • 3D Architecture

  6. Deployment in 2D • Triangular-grid Coverage Properties • Sensors with same sensing range r • Optimal deployment to cover a 2D area with minimum number of sensors

  7. Deployment in 2D • Triangular-grid Coverage Properties • Sensing coverage η • We can estimate d/r when we set η. • In this paper, η=0.95, and corresponding d/r = 1.95 Overlap Non-overlap

  8. Deployment in 2D Coverage=0.95 • Triangular-grid Coverage Properties Ratio of sensor distance and sensing range=d/r=1.95

  9. Deployment in 2D • Triangular-grid Coverage Properties 100 x 100 m^2 300 x 200 m^2

  10. Deployment in 2D • Trajectory of a Sinking Object

  11. Deployment in 2D • Trajectory of a Sinking Object • Assumptions in this paper: • No vertical movement of ocean water • The considered area is neither an upwelling nor a downwelling • The velocity of the ocean current depends on depth • H: # of different ocean current layers • Current in each layer has a fixed module and angular deviation (with known statistics) • Thermohaline Circulation (ocean’s conveyor belt)

  12. Deployment in 2D • Trajectory of a Sinking Object • Kind of Hydrodynamics

  13. Deployment in 2D • Trajectory of a Sinking Object

  14. Deployment in 2D • Communication Properties of 2D UW-ASNs • Every sensed data should pass gate-way • Sensor & gate-way have different weights • Gate-way is heavier than sensor

  15. Deployment in 2D • Deployment Surface Area: Side Margins

  16. Deployment in 3D • 3 Strategies • 3D-random • The simplest strategy. • Random deploy, random depth. • Bottom-random • Random deploy. • Surface station calculates the depth for each sensor. • Bottom-gird • Assisted by one or multiple AUV • Grid deploy. • Assigned a desired depth by the AUV

  17. Deployment in 3D • 3 Strategies

  18. Conclusion • Deployment strategies for 2D and 3D architectures for UW-ASNs • Deployment analysis in order to: • Determine the minimum number of sensors • Provide guidelines on how to choose the deployment • Determine the minimum number of uw-gateways, given some desired communication properties of clusters

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