Online energy consumption monitoring of wireless testbed infrastructure through the NITOS EMF framework

Abstract

Development of energy-efficient protocols and algorithms requires in-depth understanding of the power consumption characteristics of real world devices. To this aim, energy efficiency analysis is performed by the research community, mainly focusing on the development of power consumption models. However, recent studies [1] have highlighted the inability of existing models to accurately estimate energy consumption even in non-composite scenarios, where the operation of a single device is analyzed. The inability of such models is further highlighted under real life scenarios, where the impact induced by the simultaneous operation of several devices renders the application of traditional models completely inappropriate. As a result, energy efficiency evaluation under complex configurations and topologies, needs to be experimentally investigated through the application of online monitoring solutions. In this work, we propose the innovative NITOS Energy consumption Monitoring Framework (EMF) able to support online monitoring of energy expenditure, along with the experiment execution. The developed framework is built on a distributed network of low-cost, but highly accurate devices and is fully integrated with the large-scale wireless NITOS testbed. Framework evaluation is performed under both low-level experiments that demonstrate the platform's high-level accuracy, as well as through high-level experiments that showcase how online and distributed monitoring can facilitate energy performance assessment of realistic testbed experiments.

Online energy consumption monitoring of wireless testbed infrastructure through the NITOS EMF framework

“…Towards enabling accurate energy efficiency evaluation of proposed protocols, under real world scale and settings, advanced methodologies and solutions need to developed. Our work in [5] proposes the innovative NITOS EMF Framework that is able to characterise Permission to make digital or hard copies of all or part of this work for personal or classroom use is granted without fee provided that copies are not made or distributed for profit or commercial advantage and that copies bear this notice and the full citation on the first page. Copyrights for components of this work owned by others than ACM must be honored.…”

Experimental evaluation and comparative study on energy efficiency of the evolving IEEE 802.11 standards

“…We also modified the nodes' power supplies by inserting a current-shunt resistor of 0.01Ω in series between the power supply and the node's motherboard. In order to accurately measure the voltage drop across the resistors, we used the NITOS ACM card that was introduced in our previous work [9]. The developed card, which is presented in Fig.…”

“…The followed power measurement methodology is based on custombuilt hardware that was developed in our previous work [9] and enables online energy consumption evaluation at both the Network Interface Card (NIC) and the total wireless node levels. In-depth analysis of the extensive list of obtained measurements aided in identifying factors that affect energy consumption on commodity 802.11 hardware.…”

Green frame aggregation scheme for Wi-Fi networks

“…The power consumption of the wireless interface cards in our testbed, Atheros AR9380, was measured by Keranidis et al [13] using an online energy consumption monitoring framework. They varied the operation mode at the transmitter side and repeatedly monitored the energy consumption of each wireless NICs at both the transmitter and the receiver side.…”