[aprssig] Digital two-way Radio communication in emergency situations
scott at opentrac.org
Mon Sep 8 12:52:59 CDT 2014
On 9/8/2014 9:20 AM, Robert Bruninga wrote:
>> A new network ought to allow only users with... coordination
>> You don't get to transmit without knowing the exact time... [slot]
>> The tricky part is coordinating slot reuse between overlapping digis...
> An easy fix for purpose built nets for special events is to eliminate that
> problem by using split freqs. One for the trackers and the other for the
> digi outputs. Just like we do here for local special events. 144.39 for
> digi outputs (so everyone can see everything and everyone) and +600 for
> tracker inputs.
That's not exactly what I meant... though for the Burning Man project I
was working on slotted digis that would aggregate traffic over a 5
second period and transmit everything within a dedicated 1-second digi slot.
The problem I'm talking about is if you have a digi acting as a channel
access control authority and assigning slots to trackers. You don't
want the same slot on the same channel being used by different trackers
in overlapping digi coverage areas.
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