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zur Erlangung des akademischen Grades
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@MISC{Fakultät_zurerlangung,
author = {Der Fakultät and Elektrotechnik Informationstechnik and Xiaolei Shi},
title = {zur Erlangung des akademischen Grades},
year = {}
}
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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 a MAC 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.
Keyphrases
zur erlangung rf transceiver sensor device important system parameter low-cost wireless sensor device channel efficiency wake-up-frame scheme analytical computation mac layer wake-up-frame scheme reasonable range complementary lowpower mac protocol response time power supplier mac layer duty cycle significant system battery rf transceiver on-demand preferred method power consumption traditional method cheap battery simulation result wireless sensor network ubiquitous computing low-traffic wireless sensor network recent year important issue booming research topic optimized solution power consumer combined scheme receive mode
