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Comment by hansor | Hacker News Reader

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hansor·

Why can't we just use TCP over AX.25?

This "problem" (TCP over HF/VHF) has been solved around 1979(sic!).

- https://en.wikipedia.org/wiki/KISS_(TNC)

- https://en.wikipedia.org/wiki/Packet_radio

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Technology has evolved since 1979, modern encodings can get a lot better numbers than what was possible back then. And amateur radio is at least nominally about experimentation, not "only do the same thing we did 40 years ago and question everything newer" or "but somebody else is already working on this".

Yep, and even all of the problems with these, have been solved with new protocols and megabit speeds over long distances:

http://lea.hamradio.si/~s53mv/nbp/nbp.html

http://lea.hamradio.si/~s53mv/nbp/new.html (10mbits over ~100km)

Does it need a license?

Yes, you need a ham licence to transmit in those bands (also for the bands in the original article)

Werent UHF freqs license free because of DVB-T adoption? At least in a good chunk of Europe...

Nah, in europe you have PMR446[0] free for all, but this was free even before the dvb-t adoption, and you can use it only for voice communications. Former TV bands were/are used for 4G and 5G (eg 700MHz and 800MHz bands).

In most european countries, getting a ham licence is a pretty cheap process (in slovenia, in some radio clubs, if you don't need a printed book (just a pdf), you can join a 10-15hour theoretical and practical course + licence exam for somewhere around 50eur)

[0] https://en.wikipedia.org/wiki/PMR446

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