Abstract
Wake-up radio (WuR) system is often presented as the best candidate for replacing traditional duty cycled Medium Access Control (MAC) protocols in Wireless Sensor Networks (WSNs). The Double Radio (DoRa) protocol is a new MAC protocol for in-band WuR system with addressing capabilities. While the DoRa protocol improves the WSNs energy efficiency, it still suffers from an overhearing problem when the WuR system is very often requested. The WuR wastes a noticeable amount of energy when overhearing to wake-up demand intended to other nodes, but it is neither measured nor solved in other works. In this paper, an adaptive duty-cycled DoRa (DC-DoRa) is then proposed to solve the overhearing problem. The primary concept of the work is to enable the WuR functionality before the node is addressed and to disable the WuR after the node sent data. Extensive simulations under OMNeT++ using real input parameters are then performed to show the significant energy-savings through the two protocols and the nearly suppression of overhearing with DC-DoRa. In fact, the mean power consumption is three-order below using the DoRa protocol compared to traditional MAC protocols. While overhearing can represent up to 93% of the WuR energy consumption with the DoRa protocol, it is reduced to only 1% with the DC-DoRa protocol.
Highlights
Wireless Sensor Networks (WSNs) are one of the most promising technologies and they are used in many ap-How to cite this paper: Lebreton, J.M., Kandukuri, S., Murad, N. and Lorion, R. (2016) An Energy-Efficient Duty-Cycled Wake-Up Radio Protocol for Avoiding Overhearing in Wireless Sensor Networks
Evaluating the energy repartition gives a good understanding on what to do for improving the energy efficiency, especially it shows that the DC-Double Radio (DoRa) protocol solves the overhearing problem completely
The results show the energy efficiency of the duty-cycled DoRa (DC-DoRa) protocol compared to the DoRa protocol for low Wake-up Call (WuC) inter arrival time, where the overhearing problem is more pronounced
Summary
Wireless Sensor Networks (WSNs) are one of the most promising technologies and they are used in many ap-. (2016) An Energy-Efficient Duty-Cycled Wake-Up Radio Protocol for Avoiding Overhearing in Wireless Sensor Networks. Few MAC protocols have been proposed during the last years to incorporate the WuR features, such as RTM [9], On Demand MAC [10] and SCM-MAC [8] These protocols significantly reduce the energy consumption of the nodes, even though a more energy-efficient wake-up scheme can be achieved. The only work comparing WuR protocols performance among themselves was performed by [11], but it was applied for implantable body sensor networks and simulations were carried out in MATLAB with few details about the implementation. We propose a new MAC protocol, namely DC-DoRa, to avoid the overhearing problem by essentially duty cycling the WuRx. To the best of our knowledge, there is no other work dealing with this approach.
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