Order Tray | Contact Us | Home | SIG Lists

[aprssig] APRS Reply ACKS and message lesson 101

Doug Cox jdmcox at jdmcox.com
Wed Jan 16 22:10:27 UTC 2008


I can answer my own question, which was:
<Quote>
Sorry to ask a question that must be stupid because it's never asked, but:
Why doesn't the client program that sends the data (of any kind) repeatedly send it again in 10 seconds if it doesn't receive that data back from a digipeater? This method requires a digipeater, of course, but they seem necessary to the proper functioning of APRS. And once a digipeater gets the data, can't it re-send it without a blocked transmission? Thus 1 hop data should be guaranteed to arrive. Is there anything wrong with this logic?
<Unquote>

Sure, using the quoted method, the data can be received and re-sent by a digipeater, no problem. The problem is that the digipeater's re-transmission could still be stepped-on by other transmissions from other digipeaters, and so not received by the intended receiver.

So now I understand APRS Reply ACKS and message lesson 101.

Doug Cox
_______________________________________________
aprssig mailing list
aprssig at lists.tapr.org
https://lists.tapr.org/cgi-bin/mailman/listinfo/aprssig

_________________________________





More information about the aprssig mailing list