Ultra low power MAC layer wake-up frame scheme for low cost and low traffic wireless sensor networks
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Date
2006-03-17T10:22:36Z
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Abstract
Wireless sensor networks, as a key enabling technology of Ubiquitous Computing, have
been a booming research topic in the recent years. Upon designing a low-cost wireless
sensor device, power consumption is one of the most important issues, because cheap
batteries are normally the power suppliers. Since the RF transceiver is one of the biggest
power consumers in such a sensor device, enabling the RF transceiver to sleep as much as
possible is the preferred method to save power, which is normally realized by MAC layer
duty cycle scheduling.
This dissertation proposes aMAC layer wake-up-frame scheme to wake up an RF transceiver
on-demand to minimize the standby waiting time in receive mode to save power.
Analytical and simulation results show that, for a low-traffic wireless sensor network, this
scheme gives significant system battery lifetime gain compared to the traditional methods.
Furthermore, the combination of the wake-up-frame scheme and a complementary lowpower
MAC protocol is discussed. Analytical computation and simulation prove that the
combined scheme achieves a further optimized solution in the sense of power-saving, while
other important system parameters, such as response time and channel efficiency, are limited
to a reasonable range.
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Keywords
Low-power MAC, Wireless sensor network, Duty cycle scheduling