Lord a localized reactive and distributed protocol for node scheduling in wireless sensor networks
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LORD: A Localized, Reactive and Distributed Protocol for Node Scheduling in Wireless Sensor Networks. Arijit Ghosh and Tony Givargis Center for Embedded Computer Systems Department of Computer Science. Design, Automation, and Test in Europe Conference and Exhibition (DATE’05). Outline.

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Lord a localized reactive and distributed protocol for node scheduling in wireless sensor networks

LORD: A Localized, Reactive and Distributed Protocol for Node Scheduling in Wireless Sensor Networks

Arijit Ghosh and Tony Givargis

Center for Embedded Computer Systems

Department of Computer Science

Design, Automation, and Test in Europe Conference and Exhibition (DATE’05)


Outline
Outline Node Scheduling in Wireless Sensor Networks

  • Introduction

  • The LORD protocol

  • Simulation

  • Conclusion


Introduction
Introduction Node Scheduling in Wireless Sensor Networks

  • Energy is a major design bottleneck in wireless sensor network

    • System energy conservation by reduction of active nodes

  • This paper propose a distributed node-scheduling protocol

    • Maintains coverage

    • The number of scheduled nodes is minimized


Introduction1
Introduction Node Scheduling in Wireless Sensor Networks

  • The node-scheduling problem is to identify a minimal subset C of F that covers A. More specifically, compute C:

  • F = {s1,s2,…,sŋ}


Introduction2
Introduction Node Scheduling in Wireless Sensor Networks

Sj

Sm is a redundant sensor

Si

Sm

Sl

Sk


The lord protocol
The LORD protocol Node Scheduling in Wireless Sensor Networks

  • Set-up phase

    • All the sensors individually run a heuristic algorithm to decide their initial state

  • The steady phase

    • All dying sensors run a localized heuristic algorithm and nominate the sleeping sensors that can cover for themselves


The lord protocol set up
The LORD protocol Node Scheduling in Wireless Sensor Networks~set-up

  • Each sensor first builds up its list of neighbors, si.NL


The lord protocol set up1
The LORD protocol Node Scheduling in Wireless Sensor Networks~set-up

  • s1.NL={s3,s4.s5}


The lord protocol set up2
The LORD protocol Node Scheduling in Wireless Sensor Networks~set-up

  • The sensor sidefers its decision on its intial state untilall sensors sj such that sj ∈ si.NL and j < i have made their decisions


The lord protocol set up3
The LORD protocol Node Scheduling in Wireless Sensor Networks~set-up


Simulation
Simulation Node Scheduling in Wireless Sensor Networks

  • 50m x 50m

  • The sensing area of each is equal to its communication area and both are set to be a circle of radius 10m

  • We deploy 80, 90, 100, 110, 120 and 130 sensors


The lord protocol set up4
The LORD protocol Node Scheduling in Wireless Sensor Networks~set-up

  • To eliminate this redundancy, each ON sensor sireevaluates its initial decision.


The lord protocol set up5
The LORD protocol Node Scheduling in Wireless Sensor Networks~set-up

sleep


The lord protocol steady
The LORD protocol Node Scheduling in Wireless Sensor Networks~steady


The lord protocol set up6
The LORD protocol Node Scheduling in Wireless Sensor Networks~set-up

  • s1.NL={s3,s4.s5}


Simulation system lifetime
Simulation Node Scheduling in Wireless Sensor Networks~System Lifetime


Simulation communication
Simulation Node Scheduling in Wireless Sensor Networks~Communication


Simulation communication overhead
Simulation Node Scheduling in Wireless Sensor Networks~Communication overhead


Conclusion
Conclusion Node Scheduling in Wireless Sensor Networks

  • we have presented a distributed, localized

    and reactive protocol for node-scheduling in a sensor network.

  • As future work, we intend to incorporate other system dependent parameters, like routing and communication, in our protocol.


Thank you

Thank You!! Node Scheduling in Wireless Sensor Networks


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