[aprssig] Igates Are A Fair Weather Solution (was:"Finito")

AE5PL Lists HamLists at ametx.com
Mon Aug 29 14:04:56 EDT 2005

In an emergency situation, the key is _local_ operation.  As I
described, a temporary NSR digipeater would be put in to fill a whole
left by a disabled digipeater.  Multiple methods could be used: use the
disabled digipeater's callsign-SSID to be part of the existing network,
use a different callsign-SSID to operate autonomously (probably most
desired in most emergency operations), or use a different callsign-SSID
and coordinate with _one_ digipeater sysop to be part of the larger
network.  Better to coordinate with one person than to have everyone
involved in the emergency communications have to try and modify their
path settings, especially when many of those people won't be able to do
those modifications during the emergency or immediate aftermath.

Keep in mind: single-channel, half-duplex repeating (digipeating)
efficiency and reliability decreases exponentially as you increase the
number of repeaters (digipeaters) in the path.  APRS is "tactical" and,
during an emergency, is of primary interest to _local_ emergency
coordinators to manage _local_ assets.


Pete Loveall AE5PL
mailto:pete at ae5pl.net 

> -----Original Message-----
> From: Jason Winningham
> Posted At: Monday, August 29, 2005 12:20 PM
> Subject: Re: [aprssig] Igates Are A Fair Weather Solution 
> On Aug 29, 2005, at 10:57 AM, AE5PL Lists wrote:
> >  Even _temporary_ digipeaters using the NSR algorithm
> NSR (as I understand it) appears to be 100% static routing.  
> How do temporary digis fit in?  It looks like surrounding 
> digi operators would have to manually configure (or 
> pre-configure) to repeat packets from the temp digi.

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