[aprssig] ID requirements...

Chris Rose kb8uih at sbcglobal.net
Thu Nov 11 07:50:43 EST 2004

In regard to a path of one,

Where does the traffic have to go past your digi?  If
its path is only 1, it wouldn't go past one station
away from you.  Is that one hop an I gate?  Is that
one station alwyas reliable?  If you don't want to
have your digi send past one hop, then is it on its
own net frequency that those two stations share and
off 144.39mhz?

As an aside Winaprs will tell me how many hops a
received packet takes, I can read it on the screen.  I
can see the stations identified to read the call signs
and make my own directed paths if necessarry.  When my
packets are digied I can see what digis heard it.


--- Robert Bruninga <bruninga at usna.edu> wrote:

> > WHY does a digipeater need to ID past one hop?
> > ... distant areas do NOT need to know about my
> local digi.
> I disagree.  Knowledge is power.  Knowledge of the
> network
> is what makes APRS work when needed and what
> separates
> true communicators from appliance operators.  There
> are 
> times when one needs to get a message to a distant
> station
> and knowing where the digis are, and their callsigns
> makes
> it easy to use a specific path to get there without
> QRM.
> > [If I use] RELAY,K9PUP,K9DOG,K9CAT. It makes it as
> > far RELAY*, but k9pup doesn't hear it due to a
> collision.
> That's why the sending station retries.  But a 4 hop
> path
> has such a low probability of success, I'd rather
> use a 2
> or 3 hop example. (and a fixed station should not
> start with
> RELAY either).
> > ... but we never know the number of hops our
> message 
> > will take to get there...
> That's the problem with MOST current APRS clones, 
> because
> they do not show the overlaping DIGI coverage PHG
> circles
> or do it wrong or poorly.   The range circles of a
> digi makes it
>  trivial to see how many hops it takes to get
> anywhere.  
> It amazes me that UIview ignroes this fundamental
> aspect of 
> communications...  Its users cannot visualize paths!
> >  but really, why do I need to know about a network
> resource 
> > that I cannot (practically) specifically address
> to get to a 
> > station
> Because a directed path is the BEST way to get
> there.
> and you need to know the callsign to use a directed
> path.
> >To me "advertising" your local digipeater out 2 or
> 3 hops
> > is just a ego thing.
> Anything beyond 2 hops or more often than once an
> hour
> true.  But one packet every hour to give a true DIGI
> map
> of the region is of trememdous value to people who
> actually
> "use" APRS, instead of just watching pretty maps...
> Bob

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