Journal of South China University of Technology (Natural Science Edition) ›› 2005, Vol. 33 ›› Issue (12): 46-51.

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An 802．1 1 DCF-Based Power-Saving Protocol for Ad Hoc Networks

Li Ning1  Xu Yan1  Xie Sheng-li2   

  1. 1.No.7 Research Institute,China Electronics Tech.Group College of Electronic and Inform ation Engineering,South ChinaCorporation,Guangzhou 510310,Guangdong,China;Univ.of Tech.,Guangzhou 5 10640,Guangdong,China
  • Received:2005-02-25 Online:2005-12-25 Published:2005-12-25
  • Contact: 黎宁(1973-)，男，博士，现在华南理工大学与中国电子科技集团公司第七研究所合作开设的博士后工作站工作，主要从事宽带网络技术和无线通信研究． E-mail:liningbjqh@yahoo.com.cn
  • About author:黎宁(1973-)，男，博士，现在华南理工大学与中国电子科技集团公司第七研究所合作开设的博士后工作站工作，主要从事宽带网络技术和无线通信研究．
  • Supported by:

    国家杰出青年科学基金资助项目(60325310)；广东省自然科学基金团队研究项目(04205783)

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Abstract:

To extend the usage scope of an 802.1 1 DCF-based wireless LAN power-saving MAC protocol 802.1 1 PS to a multi.hop mobile environment,a modified version called 802.1 1 NPS is proposed.It applies a packet-driven dynamic switching.of mechanism to the wireless network interface card to save power.By delaying the switching operations after the nodes receive unrelated control packets,802.1 1 NPS can excellently support the upper-layer
routing protocol.It does not need the global synchronization and can also be used in fully-connected networks.Mo‘ reover,by using a more accurate power-consumption model,the performance of 802.1 l NPS is studied by simula-tion.The results show that.within the simulated scenarios under consideration.802.1 1 NPS can save power by 60%at its maximum in a fully-connected network and by 18% at its maximum in a multi-hop mobile ad hoc network,and that 802.1 l NPS is of a similar throughput to 802.1 l DCF and is of better delay perform ance than the latter.

Key words: 802.1 1 NPS, powersaving, ad hoc network, wireless network interface card, medium access control