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Considering PCF for WSN

Presenter: Jae Weon Choi Affiliation: Graduate School of Convergence IT. Considering PCF for WSN. Motivation. Collision worsen Power Waste Issue Delivery Latency Issue Delivery Completion Rate Collision Happen because Contention Based Multi Access Approach has been taken

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Considering PCF for WSN

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  1. Presenter: Jae Weon Choi Affiliation: Graduate School of Convergence IT Considering PCF for WSN

  2. Motivation • Collision worsen • Power Waste Issue • Delivery Latency Issue • Delivery Completion Rate • Collision Happen because Contention Based Multi Access Approach has been taken • In addition, Collision Avoidance has overhead • Using PCF Network can become Collision-Free

  3. PCF Adaptation • 계층 형 WSN • Cycle 분활 형 • Cycle 순례 형

  4. PCF Adaptation(cont.) • Cycle 분활 형 (No Buffer) • Cycle=(Sum((End node Number)*(Node Limit)^N))*2 while N = {0…(Number of Layer-1)} • Retransmission period = Cycle

  5. PCF Adaptation(cont.)

  6. PCF Adaptation(cont.) • Cycle 분활 형 (With Buffer) • Cycle = (Node Limit) * 3 * (Transmission Time) • Retransmission period = Cycle

  7. PCF Adaptation(cont.)

  8. PCF Adaptation(cont.) • Cycle 순례 형 • Cycle = 3 * (Transmission Time) • Retransmission period = Cycle * (End Node Number)

  9. PCF Adaptation(cont.)

  10. Expected Result of PCF • Increase in Delivery Completion Rate • More Accurate estimation of Latency • No Power waste due to collision

  11. Problems Found • Increase in Cycle Time and Delivery Latency • Increase in Idle Listening • Collision Still exist • Complicated Network Initialization

  12. Why do Collision Still Exist? • When 1-1-2 is registered at 1-1-0 and 1-2-1 is registered at 1-2-0 • When 1-1-2 and 1-2-1 was assigned same sending Period • It does not happen at Cycle 순례 형

  13. Conclusion • Currently, not Competent • Adaptive Wakeup Scheduling Used SPEED MAC May Improve it • Utilizing PCF just for Multi-Source Traffic Mode

  14. 즐거운 겨울 되세요. 감사합니다.

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