Re: File transfer protocol for Radio Links

From: Joel Kolstad (JKolstad71HatesSpam_at_Yahoo.Com)
Date: 02/18/05 

Date: Fri, 18 Feb 2005 12:04:23 -0800

None of the protocols for 'wire line' file transfers will -- typically --
work well over radio links. Of course, if you're close enough and have a
really good signal, you can use whatever protocol you want and you'll be
fine, but as a rule of thumb most on-air protocols are designed with the
expectation of raw bit error rates in the ballpark of ONE IN ONE HUNDRED.
This is orders of magnitude worse than what wired proocols expect;
realistically you're either going to have to resign yourself to very short
distance links or find a protocol aimed at on-air applications. The amateur
radio guys have a wide number to choose from (e.g., Pactor, Olivia, etc. --
avoid the older stuff like RTTY, it gives up tremendous amounts of speed
because it doesn't use error correction).

Although nowhere near as complex as some cell phone protocols (where
carriers are trying to jam as many possible channels into the spectrum they
paid literally millions of dollars for), even the amateur radio protocols
are a lot more sophisticated that Kermit, X/Y/Z-Modem, etc.

---Joel Kolstad

Relevant Pages

  • Re: File transfer protocol for Radio Links
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