[aprssig] Smart TX igate message routing?

Jess Haas km6gvw at jesshaas.com
Mon Mar 6 14:01:02 CST 2017


Maybe it is a stupid idea but I do think we could do a bit better than a
wide path. If we know a more specific path can't we decrease channel
congestion and QRM while increasing range without needing any modification
to the digipeater infrastructure?

Wouldn't the target station be more likely to receive the message if it is
only hearing it from the closest digipeater instead of a bunch of them
transmitting at the same time creating QRM?

When a mobile station is right next to an igate and they can hear each
other directly why should we spam the whole region with the traffic via
digipeaters?

Also it allows for using other stations not just digipeaters to extend your
range for receiving messages not just transmitting. So if im in a valley
and cant hit/hear a digipeater I can set the first hop in my path to
another station i can hit and then when an igate tries to get a message
back to me it will route it through that station.

-Jess


On Mon, Mar 6, 2017 at 10:11 AM, Robert Bruninga <bruninga at usna.edu> wrote:

> APRS by design will be digipeated by EVERY digipeater that hears it.  So
> if the one farther south hears it, it is already going to digipeat it
> anyway.  Nothing you need to do to make that happen…
>
>
>
> And in SoCal, there are so many digis, that your path should be just one
> hop and it will still hit every digi that hears it that first hop.
>
>
>
> Bob
>
>
>
> *From:* aprssig [mailto:aprssig-bounces at tapr.org] *On Behalf Of *Jess Haas
> *Sent:* Monday, March 06, 2017 1:08 PM
> *To:* TAPR APRS Mailing List
> *Subject:* [aprssig] Smart TX igate message routing?
>
>
>
> Where I am located in Southern California I can hit many digipeaters. For
> home station beaconing setting a single one of them as my route seems to be
> the way to go but for tx message igating I was thinking it may make more
> sense if the outgoing path was the one that the station was last heard on.
> Has anyone implemented anything like this?
>
>
>
> For example the digipeater I have the strongest path to may not be able to
> get a message to a station farther south but I can hear and hit a
> digipeater rather far south that the station can hear easily. Also if I
> have heard a station directly recently than I should have no problem
> getting a message to them directly even if they have moved some with my
> basestation antenna and possibly higher power so digipeating to the whole
> area may be unnecessary.
>
>
>
> Another advantage of this would be that a station that is in an RF hole
> such as a valley that can't hear or hit a digipeater but has a path to
> another station that can could set that station as a path and messages
> would automatically be routed back to them.
>
>
>
> Thoughts?
>
>     Jess
>
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>
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