[Xastir] Change to RELAY digipeat function

[Bennett, Joe]

I'm gonna agree with Gerry here. "Work arounds" are
only just that, the loopholes remain. IMHO fixing the
issues of rogue paths in an area can only be regulated
via the infrastructure itself. I'm open to other
opinions here, but years of dealing with cellular
networks leads me down this path. Yes, in cellular
networks we have more control over these types of
situations since I can tell a mobile, "I don't want to
hear from you for a while". That luxury is not
available to us. What we can do is look to coordinate
and develop the infrastructure needed. 

My vote is for firmware algorithms to be developed to
handle channel congestion in the TNC. Additionally a
protocol developed for the software digis so they can
get a better idea on the channel conditions. Albeit we
cannot stop it all,


Just my $.02



-Joe

  
--- Gerry Creager N5JXS <gerry.creager at tamu.edu>
wrote:
> Deep breath.  Exhale.  Do it again.
> 
> <opinion>
> Most of this is not going to relieve packet
> congestion on metro-digi 
> networks.  It's gonna look like it for a period of
> time until the folks 
> who don't follow the APRS sig catch up/catch on, and
> then the congestion 
> will return.  The transient interlude of inadequate
> user upgrades will 
> provide the appearance of success.  The short memory
> cycles associated 
> with most hams will preclude recollection of the
> previous congestion and 
> the implication will be that things were better for
> a while, but the 
> population's growing.
> 
> At some point, physics will have to intrude on
> conjecture in the 
> application of RF networking.
> 
> This is a band-aid approach to an arterial
> laceration.
> </opinion>
> 
> gerry
> 
> 
> James Ewen wrote:
> >> While we're at it, why would the home stations
> act on WIDE1-1 in the 
> >> second
> >> slot anyways?
> > 
> > 
> > The concept is to try and get rid of the multiple
> copies of packets that 
> > bounce around when using the alias of RELAY. By
> using the alias of 
> > WIDE1-1, you can get the same type of help from a
> "walnut" TNC in a home 
> > station (via MYALIAS WIDE1-1), while the high
> level "walnut" TNCs on the 
> > mountain tops can act upon it adding it to their
> antiduping list (via 
> > UITRACE WIDE,28).
> > 
> > This keeps the number of copies of a packet down
> to a minimum. WIDE1-1 
> > as a home alias is used, since it can be
> implemented across all TNCs, 
> > not just a specific brand. It is also not
> implemented via UIFLOOD in 
> > home TNCs, since that would turn the home TNC into
> a digipeater that 
> > would act upon all values of n-n. We want the home
> fill-in stations to 
> > act only upon the WIDE1-1 path.
> > 
> > Remember that a tnc looks for it's name anywhere
> in the path, so ANY 
> > position containing WIDE1-1 would trigger the home
> fill-in stations.
> > 
> > It would be the same as currently running a path
> such as:
> > 
> > WIDE2-2, RELAY
> > 
> > We wouldn't do that, since every home fill-in
> station around the outer 
> > WIDEn-n digipeaters would fire up.
> > 
> > The simple rule of thumb is use WIDE2-2 as your
> path. IF and only IF you 
> > NEED to make use of the home fill-in stations to
> get out, use a path of 
> > WIDE1-1, WIDE2-1.
> > 
> > WIDE2-2 activates only the mountain top digis.
> > 
> > WIDE1-1 activates home fill-in stations, as well
> as the mountain top 
> > digis. WIDE2-1 will give you that second hop, but
> only through the 
> > mountain top digis without triggering the home
> fill-in stations. In the 
> > mountain top stations, since they are acting upon
> the path using the 
> > anti-duping routine, they never repeat the same
> packet twice which is 
> > what can currently happen when using the path of
> RELAY,WIDE1-1 or higher.
> > 
> > James
> > VE6SRV
> > 
> > _______________________________________________
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> 
> -- 
> Gerry Creager -- gerry.creager at tamu.edu
> Texas Mesonet -- AATLT, Texas A&M University	
> Cell: 979.229.5301 Office: 979.458.4020 FAX:
> 979.847.8578
> Page: 979.228.0173
> Office: 903A Eller Bldg, TAMU, College Station, TX
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