1069Re: [tracker2] NSR support?
- Sep 29, 2006On Fri, 29 Sep 2006, Jason Winningham wrote:
> If I understand things correctly, doesn't the "preemptive" flag on theYes. But now you've added 7 bytes per callsign, three times, for a
> T2 digi config indicate that I can do something like preemptive digi on
> a call of SAR and use
> so that it'll use the normal infrastructure or any special SAR even
> digis that are up, if they're doing preemptive? The special event
> digis could ignore WIDE and focus the traffic on the SAR paths, but a
> tracker would still get in if it happened to hit a WIDE before it hit a
total of 21 bytes added to the packet header. That's an extra
17.5ms we could get rid of if we had no path at all.
Yea, the preemptive digipeating would probably work well.
> Or is that the problem you're trying to solve?Kind'a. It wouldn't be a bad idea at all to have the SAR units be
able to use the existing APRS infrastructure, and I posted with that
in mind up until my last post or two.
If however the SAR network was a self-contained ad-hoc network all
to its own and didn't strictly _need_ the APRS digipeaters, then we
could shorten the packets greatly by doing away with the path and
doing our own thing with the destination callsign slot.
Even in this case it might be good for the SAR trackers to send to
"WIDE1-1,WIDE2-1" on the way to the search area, but then the path
could be truncated at the first SAR digi encountered, or one could
reconfigure all of the SAR trackers for the correct path as they
enter/exit the woods (remotely configure via a program at base?).
Heck, they could listen for a broadcast from the BASE unit and
change their path based on that. During a mission the path
recommended might be "". When the mission is over, BASE tells them
to go to a path of "WIDE1-1,WIDE2-1". Or just have the tracker set
up to change to an alternate path if within XX miles of some
I know I'm dreaming a bit, and Scott hasn't jumped in here and said
anything on it. Thanks for letting us hijack the list for a bit!
Curt, WE7U. APRS Client Comparisons: http://www.eskimo.com/~archer
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