[OZAPRS] European v USnewparadigmand pathlimiting +confusion....

[Robert Bruninga]

> >> Whats this idea I see of WIDE3-3 for home stations?? 
> >> ...We use W2-2 in Adelaide .. If we use WIDE3-3 then 
> >> we will cross the border to Mildura and Ouyen 
> >> Or are we going to recomend WIDE3-3 and then Trap 
> >> the last hop in the digis

For clarity, you cannot "trap" a last hop, except at the Digi
which is the "next-to-last hop.  Let me think a bit... In my
last email I suggested maybe all mobiles use the 3 hop path of
WIDE1-1,WIDE2-2 and then let "midway digis" trap "WIDE2-1" to
keep them from entering an area that does not want to see them
from that direction.

But I don't think this will work if we try to use this technique
to trap the middle of a 3 hope packet that begins as WIDE3-3.
Its middle hop will be WIDE3-2...  Well, yes it can be used that
way.  At these same middle digis, (between two metro areas that
don't want to see each other) then these middle digis can trap
"WIDE2-1" and "WIDE3-2".  This will let them be a firewall
between the two metro areas for both mobiles and fixed stations
using 3 hop paths of either type (W1-1,W2-2 for mobiles and W3-3
for home stations)...

We may need to think this through a bit more, but it looks like
a possibility.??

De Wb4APR, Bob



> >> which is one approach..
> >>
> >> Ive seen this WIDE3-3 mentioned a couple of times now and 
> thought it must
> >> have been a typo at first ..
> >>
> >> Also 50 stations within 50miles of Adelaide.. I concur 
> with Terry.. We 
> >> must
> >> be on a different map or planet to Bob .. Our Igate shows 
> about 15 locals
> >> presently which is about normal
> >> http://121.44.67.103:14501/
> >> There are 23 VK5s currently listed on my Client here some 
> of which are via
> >> the Igate and not on RF..
> >>
> >> There are about 40 listed here but about 1/2 of them are 
> over a day old 
> >> with
> >> no recent posits.
> >> http://www.findu.com/cgi-bin/find.cgi?vk5*
> >>
> >> 50 Stations!! I gota to see that .. Talk about rush hour 
> in Adelaide.. We
> >> are just an oversized country town here and pleased to be 
> that way..
> >>
> >> Melbourne is the traffic worry on 2m APRS from what Ive 
> experienced..
> >>
> >> Tony  Hunt  VK5AH
> >>
> >> ----- Original Message ----- 
> >>     
> >>> Your thoughts Richard 3JFK too please.
> >>>
> >>> Regards,
> >>> Ron
> >>>
> >>> On Wed, 2006-11-08 at 11:06 +0800, Chris Hill wrote:
> >>>       
> >>>> Hi All,
> >>>>
> >>>> May I suggest the following "KISS" outcome for APRS in
VK:
> >>>>
> >>>>
> >>>> 1.  Mobiles set path to "APRS v WIDE1-1,WIDE2-2"
> >>>>
> >>>> 2.  Home users set path to "APRS v WIDE3-3"
> >>>>
> >>>>         
> >> Bob Said
> >>
> >>     
> >>> Boy was I wrong.  I just zoomed on the first call I saw
and
> >>> found that even Adelade is probably just about optimally
loaded
> >>> and cannot afford much coming in from say Melbourne
without
> >>> having some impact on throughput.  I see 50 stations
within 50
> >>> miles of Adelade and that is about as high as you want to
go
> >>> without losing reliability for small trackers.
> >>>
> >>> Then I zoomed in on Melbourne and see that it is as dense
as
> >>> some of our highest density cities in the USA!  We use
WIDE2-2
> >>> in those areas...
> >>> (see MAP on
http://www.ew.usna.edu/~bruninga/aprs/fix14439.html
> >>>
> >>> Seeing these maps, I now am convinced that you are on the
right
> >>> track to implement the New-N paradigm measures to help
improve
> >>> the reliability of local area APRS.  And since these
population
> >>> densities seem quite well focused with big gaps inbetween,
then
> >>> it does make sense to limit the WIDEn-N hops so that
mobiles in
> >>> one area are not QRMING long distances away to the other
> >>> areas...
> >>>
> >>> Great work!
> >>> Bob, Wb4APR
> >>>
> >>>       
> >> _______________________________________________
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> >>
> >>
> >> -- 
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> >>
> >>
> >>     
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