Abstract

The energy consumption in wireless sensor networks is the critical concern of different studies, especially because of the great effort, or even the impossibility, to replace the battery of their motes. Consequently, it is fundamental to investigate and evaluate the energy spent by every individual task executed by the motes in order to provide an efficient use of their batteries. In this work, we employ different metrics to present a thorough study of how the use of multiple transmission power levels affects multihop wireless sensor networks. This work is motivated by the current employment of the multiple transmission power levels, on both academic works and commercial solutions, which is a novel feature of some radio transceivers commonly used in wireless sensor network motes. Aiming for reliable and extensive analysis, this study employs simulations in different scenarios and models of commonly employed electronic components. The contribution of this works is a detailed investigation of the impact caused by the use of different transmission power levels employing different metrics, offering a wide perspective on the subject. In general, the results of this study indicate that the use of multiple power levels grants both positive and negative results, according to the scenario and metrics analyzed.

Highlights

  • The electronic industry is regularly lowering the power consumption of their products, achieving even figures of nanowatts [1]

  • We investigate the use of multiple transmission power levels on wireless sensor networks in different scenarios and analyze its impact using various metrics in order to provide useful study about the subject

  • It is important to note that every electronic part used in a mote consumes energy, including when they are in secondary states, like idle and sleep and that the energy consumption of secondary states is usually very low when compared to the primary states [9]

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Summary

Introduction

The electronic industry is regularly lowering the power consumption of their products, achieving even figures of nanowatts [1]. The problem is that that even a small but continuous consumption can deplete a battery, which usually is the primary power supply of a mote, in the longterm. Recent research works [4,5] and commercial devices [6,7] use dynamic transmission power levels in order to achieve different goals. We investigate the use of multiple transmission power levels on wireless sensor networks in different scenarios and analyze its impact using various metrics in order to provide useful study about the subject

Related Works and Methodology
Mote Architecture
Energy Consumption
Primary and Secondary Energy Consumption
Transmission Power Levels
Network Lifetime
Network Cost
Message Log
Simulations and Results
Primary and Secondary Consumption
Energy Consumption Profile
Lifetime
Network Cost per Working Hour
Conclusion
Full Text
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