Fixed Link Margins Outperforms Power Control in
Energy-Limited Wireless Sensor Networks.
, Uppsala University.
IEEE International Conference on
Acoustics Speech and Signal Processing ICASSP 2007
Honolulu, Hawaii, USA, April 2007.
We investigate whether adapting the transmit power
optimally to the time-varying channel compares
favorably,in terms of total energy consumption,to using
a fixed link margin in wireless networks over short
transmission distances. Over short distances,the circuit
energy consumption dominates the transmission energy.
For that reason, feeding back channel state information
a requirement for power control may not be a power
efficient strategy. We investigate both slow and
fast power control and conclude, somewhat surprisingly,
that using a fixed margin is typically more power-efficient
than using power control.
Paper at ICASSP07
on multihop versus single hop transmission
in energy-limited sensor networks.
entry in list of publications
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