America’s telecom-regulating Federal Communications Commission “has opened up the entire 6 GHz frequency band to very low-power devices,” reports the Register, “alongside other unlicensed applications such as Wi-Fi kits.”
The FCC said it has adopted extra rules to allow very low-power device operation across the entire 1,200 MHz of the 6 GHz band, from 5.925 to 7.125 GHz, within the US. The agency had already opened up 850 MHz of the band to small mobile devices a year ago, and has now decided to open up the remaining 350 MHz.
It hopes that this will give a shot in the arm to an ecosystem of short-range devices such as wearables, healthcare monitors, short-range mobile hotspots, and in-car devices that will be able to make use of this spectrum without the need of a license. These applications often call for low power transmission across short distances, but at very high connection speeds, the FCC says — otherwise, existing technologies like Bluetooth could suffice. “This 1,200 MHz means unlicensed bandwidth with a mix of high capacity and low latency that is absolutely prime for immersive, real-time applications,” said Jessica Rosenworcel, the FCC’s outgoing chair. “These are the airwaves where we can develop wearable technologies and expand access to augmented and virtual reality in ways that will provide new opportunities in education, healthcare, and entertainment.”
Because these are such low-power devices, no restrictions have been placed on where they can be used, and they will not be required to operate under the control of an automatic frequency coordination system, as some Wi-Fi equipment must to avoid interference with existing services that use the 6 GHz spectrum. However, to minimize the risk of any potential interference, the devices will be required to implement a transmit power control mechanism and employ a contention-based protocol, requiring a device to listen to the channel before transmission. They are, however, prohibited from operating as part of any fixed outdoor infrastructure.
