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[aprssig] Improving Messaging and dytnamic Object management

Steve Noskowicz noskosteve at yahoo.com
Fri Oct 23 22:00:23 UTC 2009


 
 
A disadvantage, cost or liability, is that a newcommer must wait to get the full picture.  This is similar to the new Digital TV system and one of the reasons you can have more information in the same bandwidth.  Only changes are sent "immediately", thus there is a  delay when changing channels (and you become a newcommer).  Yhave to wait for the data buffer to fill with all the old (slowly updated) data.

-- 73, Steve, K9DCI

From: Robert Bruninga bruninga at usna.edu


> This comment raises a question:  
> Why is such aggressive transmitting (8s/16s/30s/60s = average 30s interval) 
> desirable for objects, but aggressive smart beaconing for mobiles is anathema?  

Good observation.  Not an anathema at all during an event.  That
is where Smart beaconing is PERFECT...  And that is also an
ideal place where the Decay algorithm has the same advantage for
objects.

1) The original APRS Decay algorithm is required for any
meaningful use of objects at an event.  This is so that when
anything is moved by an operator, everyone gets the information
very quickly due to the initial 8, 16, and 30  second retries...
but the older objects he moved or situated several minutes ago
are at longer periods to keep the overall load down.
[...snip...]


      
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