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[aprssig] Its time for new Igates...

Gregory A. Carter gcarter at openaprs.net
Mon Sep 15 19:02:46 UTC 2008


I'm not sure how this would be accomplished really, perhaps with the path or
some other trickery but it would be nice if there was a way for an APRS-IS
program like OpenAPRS's backend daemon to be able to "force" or highly
encourage an iGate or set of iGates in a particular area to broadcast an
object based on it's lat/lng obviously.  I'm not referring to an iGate
randomly deciding if it feels like transmitting an object but rather some
flag or path feature to request an iGate in a given lat/lng coverage area
gates an APRS-IS object to RF.

We house quite a bit of data that is applicable to local traffic that
they'll never see on RF like local earthquakes we've been broadcasting  to
APRS-IS for a couple of months now...  I'd love to collect traffic data etc
and display that as well and create local RF objects for that purpose.  But
as it stands it doesn't seem like there is a good method for this.  I
suppose this is related to getting IRLP/Echolink objects out to RF but I'm
afraid that route will be some sort of iGate auto detects specific
IRLP/Echolink formats and only gates those.  I want a method to literally
tell an iGate "Hey please RF this..."

If I'm unaware of a method already in use I'd love to be enlightened...

Greg

NV6G
OpenAPRS.Net

On Mon, Sep 15, 2008 at 11:34 AM, Robert Bruninga <bruninga at usna.edu> wrote:

> > When I've tried messaging/email from remote
> > locations via I-Gates, I can often get a
> > message out, but can't receive replies because
> > the I-Gates restrict the number of hops on a reply.
>
> The problem is, we need new Igate software that takes advantage
> of the New-N paradigm and better implements APRS messaging and
> acking.
>
> 1) Few IGates do reverse-pathing for messaging as an Igate.  The
> new-N paradigm assures that ALL packets are traceable, so reply
> messaging should work much better than it does now.
>
> 2) Uiview does not do many of the APRS techniques for improving
> ACK reliabiility so acking suffers significantly.  Uiview does
> not do reply-acking which would also help
>
> 3) Most Igates do not allow for separate IS-to-RF paths separate
> from the stations own RF path.  There should also be separate
> paths for objects.
>
> 4) Also, there should be specific techniques for assuring that
> the local IRLP and ECHOlink APRS objects get to RF in each Igate
> area (and only 1 hop usually)...
>
> 5) Any other lessons leared?  I'm sure there is a wish list
> somewhere?
>
> Bob, WB4APR
> >
> > I've asked about this before, and the answer has been,
> "contact the
> > I-Gate op and have him tweak his settings for your call and
> > location."
> > That can certainly work, *if* I know in advance what I-Gates
> > I will be
> > able to reach and can actually contact the operator :)
> >
> > How are the I-Gates configured for messaging in NWAPRS land?
> (didn't
> > see it offhand on the website.)  Are the settings something
> > that can be
> > generalized for other places - or will they only work with
> > your region's
> > particular set of mountaintops and high-octane coffee? :)
> >
> > The I-Gate ops that I have talked to have been more than
> > happy to adjust
> >   settings to meet my needs.  But they are generally not
> > knowledgeable
> > about what settings *should* be.  If we had some standards
> > listed on the
> > "settings cheat sheets" posted by nwaprs, kcaprs and others,
> maybe we
> > would have more reliable messaging coverage.
> >
> > Thanks!
> >
> >    --Jeff, N0JUH
> >
> >
> > Herb Gerhardt wrote:
> > > ...
> > > Now regarding the I-Gate statement, the beauty of APRS is
> > that it uses RF
> > > and even if the local I-Gates are down, the radio signals,
> > at least in our
> > > NW APRS network can reach out over 100 miles via RF.
> > Emergencies generally
> > > effect a local area and not all areas within 100 miles, so
> > generally, you
> > > will be able to still hit an I-Gate to send and receive
> > APRS and WinLink
> > > Email messages via your APRS radio like the Kenwood D7A,
> > D700 and D710 or a
> > > home APRS station if it is still operational.
> > >
> > > I use this method for sending emails from the mountains in
> > Western WA where
> > > there is NO cell phone coverage but if you know how to make
> > the APRS system
> > > work, you can generally get a digital message out even when
> > it is not
> > > possible to make any voice contact!  I regularly go hiking
> > or hunting for
> > > more than a week at a time and do want to "keep in touch"
> > with my wife.
> > >
> > > No if you don't have enough I-Gates or APRS stations in
> > your area, that is
> > > another problem which your local hams must resolve in a
> > cooperative effort.
> > > Fortunately we have quite a few APRS stations and high
> > mountain digipeaters
> > > set up in our network that we can cover our area fairly
> > well and that covers
> > > several states including portions of Canada.
> >
> >
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> >
>
>
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