Power-saving protocols for IEEE 802.11-based multi-hop ad hoc networks

  • Authors:

  • Yu-Chee Tseng;Chih-Shun Hsu;Ten-Yueng Hsieh

  • Affiliations:

  • Department of Computer Science and Information Engineering, National Chiao Tung University, Hsin-Chu 30050, Taiwan;Department of Computer Science and Information Engineering, National Central University, Chung-Li 32054, Taiwan;Department of Computer Science and Information Engineering, National Chiao Tung University, Hsin-Chu 30050, Taiwan

  • Venue:
  • Computer Networks: The International Journal of Computer and Telecommunications Networking
  • Year:
  • 2003

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Abstract

Power-saving is a critical issue for almost all kinds of portable devices. In this paper, we consider the design of powersaving protocols for mobile ad hoc networks (MANETs) that allow mobile hosts to switch to a low-power sleep mode. The MANETs being considered in this paper are characterized by unpredictable mobility, multi-hop communication, and no clock synchronization mechanism. In particular, the last characteristic would complicate the problem since a host has to predict when another host will wake up to receive packets. We propose three power management protocols, namely dominating-awake-interval, periodically-fully-awake-interval, and quorum-based protocols, which are directly applicable to IEEE 802.11-based MANETs. As far as we know, the power management problem for multihop MANETs has not been seriously addressed in the literature. Existing standards, such as IEEE 802.11, HIPERLAN, and bluetooth, all assume that the network is fully connected or there is a clock synchronization mechanism. Extensive simulation results are presented to verify the effectiveness of the proposed protocols.