[aprssig] Fixing HID problems on APRS!
bruninga at usna.edu
Sat Jul 24 21:13:40 EDT 2004
> Seeing over 50 HID's per hour (Counting dupes this
> is as many as 200 per hour), this is an abomination on
> 144.39 just in my area. This is a BIG problem that we
> need to fix now.
The facts are simple:
HOME STATIONS: Benign home stations average about
2 packets per 30 minutes (a POSIT and a STATUS). Adding
an HID packet EVERY 10 minutes changes this to *5*
packets every 30 minutes. Thus, HID packets represent
60% of the channel load for every station with HID ON.
DIGIS: Digis properly set with a POSITION once
every 10 mins local, every 30 mins with one hop and
once every hour 2 hops are averaging about 21 total
copies per hour. BUT if HID is set, and this digi
has an UNPROTO path of 3 hops, then the HID
packet can generate almost 174 potential copies
per hour over a large area!
Just watch your raw packet stream. On average
I am seeing an ID packet about every minute.
And for a packet that has no value on APRS, this
is something we need to fix... and CAN fix.
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