The LOG-a-TEC testbed is a combined outdoor and indoor heterogeneous wireless testbed for experimentation with sensor networks and machine-type communications, which is included within the Fed4FIRE+ federation. It supports continuous deployment principles; however, it is missing an option to monitor and control the experiment in real-time, which is required for experiment execution under comparable conditions. The paper describes the implementation of the experiment control and monitoring system (EC and MS) as the upgrade of the LOG-a-TEC testbed. EC and MS is implemented within existing infrastructure management and built systems as a new service. The EC and MS is accessible as a new tab in sensor management system portal. It supports several commands, including start, stop and restart application, exit the experiment, flash or reset the target device, and displays the real-time status of the experiment application. When nodes apply Contiki-NG as their operating system, the Contiki-NG shell tool is accessible with the help of the newly developed tool, giving further experiment execution control capabilities to the user. By using the ZeroMQ concurrency framework as a message exchange system, information can be asynchronously sent to one or many devices at the same time, providing a real-time data exchange mechanism. The proposed upgrade does not disrupt any continuous deployment functionality and enables remote control and monitoring of the experiment. To evaluate the EC and MS functionality, two experiments were conducted: the first demonstrated the Bluetooth Low Energy (BLE) localization, while the second analysed interference avoidance in the 6TiSCH (IPv6 over the TSCH mode of IEEE 802.15.4e) wireless technology for the industrial Internet of Things (IIoT).
<p>Current solutions for distance estimation using the IEEE 802.15.4 TSCH standard mainly focus on improving localization performance, but in turn reduce communication performance. In this paper, we propose a novel improvement to the TSCH protocol that enables distance estimation between two devices without compromising the ongoing communication. We further improve the current state-of-the art phase-based distance estimation algorithm by combining conclusions from several research works into a single solution, that reduces energy consumption while maintaining the accuracy and sensitivity of the distance estimation results. We implemented the proposed method in the Contiki-NG OS and created a real-world measurement campaign to study the impact of the proposed solution on communication and energy consumption, which is of great concern in low-power IoT networks.</p>
<p>Current solutions for distance estimation using the IEEE 802.15.4 TSCH standard mainly focus on improving localization performance, but in turn reduce communication performance. In this paper, we propose a novel improvement to the TSCH protocol that enables distance estimation between two devices without compromising the ongoing communication. We further improve the current state-of-the art phase-based distance estimation algorithm by combining conclusions from several research works into a single solution, that reduces energy consumption while maintaining the accuracy and sensitivity of the distance estimation results. We implemented the proposed method in the Contiki-NG OS and created a real-world measurement campaign to study the impact of the proposed solution on communication and energy consumption, which is of great concern in low-power IoT networks.</p>
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