Timer-Based Distributed Node Selection Scheme Exploiting Power Control and Capture

Dewangan, Vikas Kumar and Mehta, Neelesh B (2015) Timer-Based Distributed Node Selection Scheme Exploiting Power Control and Capture. In: IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS , MAR 2015, pp. 1457-1467.

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Abstract

Opportunistic selection in multi-node wireless systems improves system performance by selecting the ``best'' node and by using it for data transmission. In these systems, each node has a real-valued local metric, which is a measure of its ability to improve system performance. Our goal is to identify the best node, which has the largest metric. We propose, analyze, and optimize a new distributed, yet simple, node selection scheme that combines the timer scheme with power control. In it, each node sets a timer and transmit power level as a function of its metric. The power control is designed such that the best node is captured even if. other nodes simultaneously transmit with it. We develop several structural properties about the optimal metric-to-timer-and-power mapping, which maximizes the probability of selecting the best node. These significantly reduce the computational complexity of finding the optimal mapping and yield valuable insights about it. We show that the proposed scheme is scalable and significantly outperforms the conventional timer scheme. We investigate the effect of. and the number of receive power levels. Furthermore, we find that the practical peak power constraint has a negligible impact on the performance of the scheme.

Item Type:	Conference Proceedings
Publication:	IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS
Publisher:	IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
Additional Information:	Copy right for this article belongs to the IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA
Keywords:	Selection; capture; power control; medium access control protocols; timer; distributed schemes
Department/Centre:	Division of Electrical Sciences > Electrical Communication Engineering
Date Deposited:	29 Apr 2015 04:47
Last Modified:	29 Apr 2015 04:47
URI:	http://eprints.iisc.ac.in/id/eprint/51443

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