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[aprssig] AUTO-ANSWER SPEC [AA]

Lynn W. Deffenbaugh (Mr) ldeffenb at homeside.to
Thu Nov 3 22:19:36 UTC 2011


The ack goes out for every copy of every message received, regardless of 
dupe status, per the APRS spec.  It's only the (courtesy, IMHO) 
Auto-Answer that gets limited to a single transmitted copy.  I'll see 
about possibly doing as you suggest and send the AA: for initial dupes, 
but retain the suppression for non-dupe multiple messages within the 
"Not More Than" interval.

Lynn (D) - KJ4ERJ - Author of APRSISCE for Windows Mobile and Win32

On 11/3/2011 6:07 PM, Bob Bruninga wrote:
>>> 3) Any such AA message is only sent once on each incoming message packet
>> Also, I deviate from #3 with a "Not More Than" timer that suppresses
>> multiple AA: responses to a single station for a time period after the
>> first one is issued.
> Not a good idea.  It needs to be on every one, because if you receive
> multiple copies of the same message, then he did not get your ack and surely
> will not get the longer AA: message.  So if you get a dupe, you need to dupe
> the ACK and the AA: message.  Though I am happy to limit it to 4 attempts.
> If he aint got it by then, he aint never going to get it.
>
> But I agree 100% in your idea for muiltiple DIFFERENT messages.  Then I
> agree, additional incoming -different- messages do not-retrigger the same
> AA: message...
>
> Bob, Wb4APR
>
>
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