6G (more like 7G) Communications Breakthrough

Liu says digital-to-analogue converters are currently used to send zeros and ones through the air in radio waves, but they struggle at higher frequencies. So his team used that technology for the lower portion of the range and a different technique involving lasers at the higher end

Not really a viable technology outside the lab. Might be objections to lasers flashing all over the place in the real world.
 
Wow, using the entire radio-light spectrum for one mobile phone download gave you a huge amount of bandwidth, go figure!
Yeah in the real world you cant just hog all frequencies to yourself, particularly as some frequencies will cause radio interference harm to equipment/scientific instruments.

If you were starting from scratch and built every possible beacon and radiocommunication device to be capable of multiplexing, yeah you could do that though there would still be frequency ranges you had to carve out for protection. But to practically implement this you would have to replace every existing radio device with with much more expensive broad spectrum capable hardware to avoid incompatibility.
 
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