Ericsson and PowerLight have demonstrated what they claim to be the world’s first wireless powered 5G base station. The proof-of-concept (PoC) demo milestone was achieved recently in Seattle using optical beaming—a laser-based technology that converts electricity into high-intensity light which is then captured and transformed to electricity at the radio base station. No wires were connected to the site from the street power grid network and no on-site power generation was involved. The base station site was completely ‘powerless’ until wirelessly powered over the air through a laser beam.
The achievement is part of a partnership between the two companies to explore and develop innovative 5G solutions aimed at enhancing the speed and flexibility of network deployment in diverse environments.
Wireless power was safely distributed to an Ericsson Streetmacro 6701—a 5G millimeter wave (mmWave) radio base station. It was achieved using PowerLight’s laser technology to transmit hundreds of watts over hundreds of meters through the air, the partners note, adding that they view the milestone as a major step toward a goal for subsequent generations of the solution to transmit kilowatts of energy over longer distances.
Kevin Zvokel, head of networks for Ericsson North America, said, “Both PowerLight and Ericsson are focused on innovation. This opens new possibilities for Ericsson and our customers. The ability to safely transfer power across distances without having to be connected to the power grid eliminates one of the big obstacles we have when building new cell sites. The time savings and flexibility gains will make this an attractive solution for our customers.”
Added Claes Olsson, PowerLight Technologies' executive chairman, “Most people are aware that wireless charging technology is available today for small electronic devices, such as cell phones and watches. This breakthrough demonstration, which utilized the best innovative technology from PowerLight and Ericsson, underscores the major leaps we have made recently toward the commercialization of safe, wireless power transmission for larger-scale systems. PowerLight is developing systems today to transfer kilowatts of safe power over distances of kilometers that will be commercially available in the next few years.”
The demo also underlined the safety of the technology, the two note; the laser beam has a virtual shield or safety ring that automatically and temporarily shuts down power transmission before any living or inanimate object crosses its path. When the safety ring is activated, the site’s back-up battery takes over until the beam is cleared. Vital base stations use batteries for local energy provisioning to ensure highly reliable mobile services.
With wireless power Ericsson is striving to cut the last cable—the power cord. This next-generation technology demo from Ericsson and PowerLight shows how power can be distributed wirelessly and create new and innovative network deployment and use case opportunities. Apart from rapid street radio rollouts, wireless power could support use cases such as provisional deployments in case of emergency or time-specific densification demands, for example, during music festivals and sport events. It could also support power-cable-free machines such as automated guided vehicles and drones, as well as devices like IoT-sensors and lamps. Communications-service providers will also have the flexibility to position a base station without compromising communication needs in relation to where a power wire is located.
The two companies are exploring the possibility of delivering safe wireless power-beaming capabilities to enable cleaner and more sustainable operations for mobile networks. Ericsson provides broad and complete RAN site solutions worldwide that cater to different environments and use cases.