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Indoor High-Speed LiFi Access
A LED unit and a USB dongle provide high-speed LiFi network access through visible light and infrared data transfer in downward and upward directions respectively.
Indoor High-Speed LiFi AccessA LED unit and a USB dongle provide high-speed LiFi network access through visible light and infrared data transfer in downlink and uplink directions respectively.
Only portable devices within the light cone can receive the transmitted data unlike those modulating radiofrequency waves (RF), whose range is difficult to control
CEA/Luciom's high-speed LiFi modems were the first to provide a bidirectional high-speed access supporting up to 15 users per lamp or LED unit. On the user-side, the low cost-low consumption dongle developed ensures good mobility within the network cell. The full system provides a transparent IP link to any type of network. Connection or cell changeover times are virtually instantaneous
When dealing with large scale deployment, most of the scenarios are facing intercellular interferences due to the overlapping optical lighting zones of the different LiFi access points. The latest developments at CEA yielded to a custom network layer and software entity called "Global Controller" that collects interference detections, synchronizes the LiFi access points and coordinates them to cancel any intercellular interference. With this, the CEA LiFi solution is the first one to allow on one hand a complete coverage area in large scale deployments, and on the other hand a spatial reuse of the resources which brings a considerable increase of the aggregated network throughput.
CEA is a French government-funded technological research organisation in four main areas: low-carbon energies, defense and security, information technologies and health technologies. A prominent player in the European Research Area, it is involved in setting up collaborative projects with many partners around the world.