[aprssig] conflicting APRS intructions

kai.brandt at hjemme.no kai.brandt at hjemme.no
Thu Oct 29 05:44:59 EDT 2009

>WIDE1-1 fill-in digis provide a way for mobiles in a dead zone to be 
>able to be digipeated out without that same digipeater adding to the 
>congestion elsewhere by also digipeating every other packet heard from 
>everywhere else.  In otherwords, it only responds to 1st hop packets 
>from mobiles and/or stations that explicitly use the WIDE1-1 hop first
>in their path. 

>This is in direct conflict with a stated goal of 2-way communication, as the "fill-in" is only repeating packets FROM the mobile >station, and wouldn't repeat TO that mobile station any packet (unless it happened to have an unused WIDE1-1 hop specified in its >path - which is unlikely.)

Not sure if you got any answer to this but a fill-in is two way.

>If the mobile can't talk to the major WIDE2 digi's in the area, they likely can't "hear" them either.  The WIDE1 "fill in" digi, in >this case, only serves to support "dump-one-way-trackers" and does nothing to facilitate 2-way communication between the station in >the dead zone and the rest of the APRS network. 

>Take care
>Gary / K3WOW

i.e a Fill-In called DIGI1 is turning a WIDE1-1,WIDE2-1 to DIGI1*,WIDE2-1
So messages to that station is going two way.

But regular traffic from wide area digipeaters are not retransmitted in the fill-in area and are most likely not wanted either.  

Kai Gunter

More information about the aprssig mailing list