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[aprssig] 9600 APRS

Jason KG4WSV kg4wsv at gmail.com
Thu Apr 2 14:08:21 UTC 2009


The 3 minute window just emphasizes the issue - reducing the time
won't make it go away (unless you reduce it to zero).

One of the problems regularly mentioned on the list is some
mis-configured digipeater erroneously doing exactly what you are
saying - holding packets for a while then sending them in a burst.
This destroys the usefulness of a mobile station/object track, as old
data gets interleaved with the new, and the station/object location
bounces around between old locations and newer.

Also, APRS is an Aloha network, and the random nature if the
transmissions is part of the design.  If you start semi-scheduling
stuff, you'll need to take a look at the design of the whole network.
I would guess that for starters, digipeaters would need fairly well
synchronized clocks.

The immediate transmission of a packet heard by a digi is a major part
of the traffic _reduction_ algorithm in the APRS network.  Your scheme
could easily result in _more_ channel utilization _and_ lost data (see
the part about sychronized digi clocks).

-Jason
kg4wsv



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