On Tue, Apr 27, 1999 at 08:53:09AM -0500, Tim Salo wrote:
> Based on a casual inspection of the APRS protocols, I think that:
>
> o We need to do a better job of applications-level protocol
> design. Personally, I think a series of binary-encoded
True, every application level protocol needs to transmit only what
is necessary. Application designers need to evaluate what needs to be
sent and how it may be used (is it necessary to be human readable?).
> o An AX.25-level compression protocol may be useful, but probably
> can't make up for poorly applications-level encoding.
> For example, a lower-level compression protocol can't determine
> what bits are simply irrelevant and should be tossed, (e.g.,
> fixed-location decimal points, longer-than-necessary keywords,
> etc.).
Compression in data transmission cannot be lossy compression (like mpeg
and jpeg compression), it must recover exactly what was sent. The task
of tossing irrelevant bits will always be the application's job.
Pat
