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Energy-Efficient MAC Protocols for Wireless Communications: Optimizing IEEE 802.11 Standards

This document delves into energy-efficient approaches to the IEEE 802.11 MAC protocol, specifically implementing the CSMA/CA mechanism. It discusses the physical and virtual carrier sensing methods and channel access coordination via Distributed Coordination Function (DCF) and Point Coordination Function (PCF). It highlights the importance of power-saving mechanisms, including the Dynamic Power Saving Mechanism (DPSM), which enables wireless interfaces to manage states effectively. Future work includes potential integration of error correction codes and the use of master nodes for enhanced performance.

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Energy-Efficient MAC Protocols for Wireless Communications: Optimizing IEEE 802.11 Standards

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  1. Serhat Kucukomeroglu & Weng Liong Low Energy-efficient Wireless 802.11 MAC Protocol CS 603 - Wireless Communications & Networks Summer II 2003 Dr. Ajay Gupta

  2. The IEEE 802.11 MAC protocol based on CSMA/CA 1)Physical carrier sense (sender) 2)virtual carrier sense (receiver) - Request to Sent (RTS) - Clear to Sent (CTS) • The 802.11 MAC protocol uses two ways to coordinate channel access. - Distributed Coordination Function (DCF) - Point Coordination Function (PCF).

  3. Power saving mechanism in the Distributed Coordination Function • A wireless interface can in - off state - doze state - awake state (transmit, receive, idle)

  4. Distributed Coordination Function

  5. Dynamic Power Saving Mechanism (DPSM)

  6. Dynamic Power Saving Mechanism (DPSM)

  7. Future works • Adding error corrections codes. • Using “master nodes” in DCF mode.

  8. References • [1] Jung & Vaidya, An Energy Efficient MAC Protocol for Wireless LANs (2001). http://citeseer.nj.nec.com/541068.html • [2] Jung & Vaidya, A Power Saving MAC Protocol for Wireless Networks (2002). http://citeseer.nj.nec.com/551865.html • [3] Zheng & Kravets, On-demand Power Management for Ad Hoc Networks (2002). http://citeseer.nj.nec.com/zheng02demand.html • [4] Singh & Raghavendra, PAMAS Power Aware Multi-Access protocol with Signaling for Ad Hoc Networks (1999). http://citeseer.nj.nec.com/singh99pamas.html • [5] Sharma, Analysis of 802.11b MAC: A QoS, Fairness, and Performance Perspective (2003). http://citeseer.nj.nec.com/sharma03analysis.html • [6] Holland et al, A Rate-Adaptive MAC Protocol for Multi-Hop Wireless Networks (2001). http://citeseer.nj.nec.com/446806.html • [7] Stine & de Veciana, Tactical Communications Using the IEEE 802.11 MAC Protocol (1998). http://www.argreenhouse.com/society/TacCom/papers98/17_04i.pdf • [8] Tseng et al., Power-Saving Protocols for IEEE 802.11-Based Multi-Hop Ad Hoc Networks (2002). http://citeseer.nj.nec.com/509561.html • [9] Qiao et al., Energy-Efficient PCF Operation of IEEE 802.11a Wireless LAN (2002). http://citeseer.nj.nec.com/qiao02energyefficient.html

  9. Questions

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