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Re: Digipeater filter rules


Angus Ainslie
 

Hi Kenneth,

Thanks fro the ideas with APRX. With the digipeaters in my area I don't ever see the packet fratricide that was described in the link.

I'm my case I think it would be sufficient to delay 100 milliseconds and then a clear channel as the packet is either digipeated immediately or not at all. With APRX running on the kiss interface it probably can't do clear channel detection.

Can it do subsecond delays ?

Angus

--------------------------------------------

On Sun, 1/22/17, Kenneth Finnegan KennethFinnegan2007@... [direwolf_packet] <direwolf_packet@...> wrote:

Subject: Re: [direwolf_packet] Re: Digipeater filter rules
To: direwolf_packet@...
Date: Sunday, January 22, 2017, 10:15 AM


?









On Sun, Jan 22, 2017 at 6:12 AM,
wb2osz@...
[direwolf_packet]?<direwolf_
packet@...>?wrote:
As
far as I know there has been only one implementation.
And that implementation is
the one I now maintain, Aprx:?.
com/aprx/
Some of the old guard APRS
developers don't like it, but the situation that Bob
describes in the linked thread where he wants digipeaters to
all have PWAIT=0 and walk over each other rarely happens
anyways due to poor documentation / his packet fratricide
theory lacking universal support, so I have lots of users
who run viscous delay and are very happy with the reduced
load on their local network / reduced transmit duty cycle on
their digi (particularly users who suffer desense on their
home base station).
I believe you can use
Direwolf to expose a KISS socket for Aprx, then you add a
"viscous-delay 5" line in your digipeater config.
It will queue every digipeated packet for 5-7 seconds
checking for any echos from other digipeaters before
transmitting it. It's impact on the local transmitter
can be seen here:?
PhirePhly/aprx/blob/master/
ViscousDigipeaterTxEffect.png
If you have any questions
about setting up Aprx, you can post them on our forum
here:?.
com/forum/#!forum/aprx- software
--
Kenneth Finnegan, W6KWF
.
com/












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