TY - GEN
T1 - Power control for mobile sensor networks
T2 - 7th Annual IEEE Communications Society Conference on Sensor, Mesh and Ad Hoc Communications and Networks, SECON 2010
AU - Ko, Jeong Gil
AU - Terzis, Andreas
PY - 2010
Y1 - 2010
N2 - Techniques for controlling the transmission power of wireless mobile devices have been widely studied in ad-hoc and cellular networks. However, as mobile applications for wireless sensor networks (WSNs) emerge, the unique characteristics of these networks, such as severe resource constraints, suggest that transmission power control should be revisited from a WSN perspective. In this work, we take an experimental approach to examine the effectiveness of power control for WSN applications that involve mobility at human walking speeds. Furthermore, we propose two light-weight transmission power control schemes to improve energy efficiency and spatial reuse. The first is an active probing based scheme that adjusts transmission power based on (the lack of) packet losses and applies to all low-power radios. On the other hand, the second scheme requires radios that offer link quality indicators (LQI) to estimate the proximity between the transmitter and receiver. We evaluate both schemes using mobile nodes in an indoor and an outdoor environment. Our results show that the energy efficiency of the proposed transmission power control schemes can be very close to that of the optimal offline strategy. Moreover, our schemes significantly reduce the interference to unintended receivers and improve spatial reuse. To our knowledge, this is the first work that evaluates the effect of transmission power control in mobile WSNs.
AB - Techniques for controlling the transmission power of wireless mobile devices have been widely studied in ad-hoc and cellular networks. However, as mobile applications for wireless sensor networks (WSNs) emerge, the unique characteristics of these networks, such as severe resource constraints, suggest that transmission power control should be revisited from a WSN perspective. In this work, we take an experimental approach to examine the effectiveness of power control for WSN applications that involve mobility at human walking speeds. Furthermore, we propose two light-weight transmission power control schemes to improve energy efficiency and spatial reuse. The first is an active probing based scheme that adjusts transmission power based on (the lack of) packet losses and applies to all low-power radios. On the other hand, the second scheme requires radios that offer link quality indicators (LQI) to estimate the proximity between the transmitter and receiver. We evaluate both schemes using mobile nodes in an indoor and an outdoor environment. Our results show that the energy efficiency of the proposed transmission power control schemes can be very close to that of the optimal offline strategy. Moreover, our schemes significantly reduce the interference to unintended receivers and improve spatial reuse. To our knowledge, this is the first work that evaluates the effect of transmission power control in mobile WSNs.
UR - http://www.scopus.com/inward/record.url?scp=77955097755&partnerID=8YFLogxK
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U2 - 10.1109/SECON.2010.5508282
DO - 10.1109/SECON.2010.5508282
M3 - Conference contribution
AN - SCOPUS:77955097755
SN - 9781424471515
T3 - SECON 2010 - 2010 7th Annual IEEE Communications Society Conference on Sensor, Mesh and Ad Hoc Communications and Networks
BT - SECON 2010 - 2010 7th Annual IEEE Communications Society Conference on Sensor, Mesh and Ad Hoc Communications and Networks
Y2 - 21 June 2010 through 25 June 2010
ER -