[aprssig] APRS messaging issues

Steve Dimse steve at dimse.com
Tue Jan 6 08:47:15 CST 2015


On Jan 6, 2015, at 8:09 AM, Jason KG4WSV <kg4wsv at gmail.com> wrote:

> Bob, I don't disagree with your suggestions for making effective use of APRS messaging, but let's get the facts straight. Why do you claim ACKs are less reliable than messages?
> 
ACKs are not ACKed and they aren't resent. So a message is sent multiple times until an ACK is received or it times out. An ACK is sent once for each received message.

So two stations nearby on a clear channel the ACK may be slightly more likely to be received because they are shorter, but in the real world where there is a decent chance for packet loss Bob's claim has validity. 

Steve K4HG


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