Power sensitive power control in ad networks

  • Authors:
  • Natarajan Meghanathan;Andras Farago

  • Affiliations:
  • University of Texas at Dallas;University of Texas at Dallas

  • Venue:
  • Proceedings of the 43rd annual Southeast regional conference - Volume 2
  • Year:
  • 2005

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Abstract

In this paper, we propose battery power sensitive power control as a variable-range transmission power control strategy to maximize network lifetime and minimize end-to-end delay in wireless multi-hop networks. The network lifetime is defined as the time by which the first node runs out of battery power. To the best of our knowledge, there is no power control strategy that takes into account the remaining battery power of a node before changing the transmission power of the node. According to our power control strategy, each node starts with a higher transmission range and then gradually tunes down its transmission range depending on the battery power available at the node. If the transmission range to be reduced to falls below a minimum threshold level that just guarantees network connectivity, the node continues to operate at the minimum transmission range. The rate at which the nodes tune down their transmission range influences the network lifetime and the end-to-end delay. Our power control strategy is localized and does not require any significant global coordination overhead even in the presence of node mobility. Through extensive simulations conducted under varying mobility and traffic load, we show that our residual battery power based power control strategy can achieve higher network lifetime and lower end-to-end delay when compared to operating the network at a fixed common power level.