Because Valdemar is battery operated, and the base-station container is solar and wind-powered, the equipment installed needed to consume as little power as possible. For this job, we tested cellular routers from Perle, Cradlepoint, and Sierra Wireless. Perle’s power consumption was half of the competitive products. That, along with the fact that Perle did not have the SIM card recognition issues that we experience with the others, made our decision to choose the IRG Routers easy.
Christoph Tieben , Team Leader Robot-Control at DFKI

Perle IRG Routers are designed to operate on limited power sources by consuming less than 1 Watt in idle mode and 52mW in standby mode. This makes them ideal for battery, solar, and wind-powered applications. They also meet all the environmental requirements with a small form factor, rugged die-cast aluminum IP54 enclosure, shock, and vibration resistance certified to MIL-STD-810G, and -40°C to 70°C operating temperatures.

An IRG5541+ LTE Router is installed on Valdemar and an IRG7440 5G Router is located inside the base-station to maintain a continuous VPN LTE connection between the robot and the container.

When Valdemar returns to base-station container, the data is automatically transferred using a local WLAN 6E network. The base-station processing equipment compresses and reduces the data before it is uploaded to the cloud-based data center overnight using the Perle IRG7440 5G Router.

DFKI Network Diagram showing connectivity between robot, base station and cloud-based data center

About Deutsches Forschungszentrum für Künstliche Intelligenz

The German Research Center for Artificial Intelligence (DFKI) has operated as a non-profit, Public-Private-Partnership (PPP) since 1988. Today, it maintains sites in Kaiserslautern, Saarbrücken, Bremen, Niedersachsen, laboratories in Berlin and Darmstadt, as well as branches in Lübeck and Trier. DFKI combines scientific excellence and commercially-oriented value creation with social awareness and is recognized as a major Center of Excellence by the international scientific community. In the field of artificial intelligence, DFKI has focused on the goal of human-centric AI for more than 30 years. Research is committed to essential, future-oriented areas of application and socially relevant topics. Currently, with a staff of about 1,460 employees from more than 65 countries, DFKI is developing the innovative software technologies of tomorrow. The financial budget was 76.3 million euros in 2021.