[aprssig] NextGen

[Bill V WA7NWP]

> AIS
>>    also has a patented algorithm to assign time slots to vessels. It is
>>    called "Self-Organized Time-Division Multiple Access" (STDMA).

> In the AIS system, timeslots are 256 bits, so there are 2250 timeslots per
> minute. Data is transmitted in a very compact binary format. The most
> frequent messages (like position reports) occupy a single timeslot. As a
> result, this system can carry a lot of payload without congestion.
>
> ITU Recommendation M.1371-3 is a highly recommended reading for
> inspiration.


This sounds exactly like what we need for our dumb trackers without
receives to assign their transmission time slots.  Maybe we could come
up with an AX version that doesn't intrude (too much) on the patent.
The ITU document doesn't appear to be openly available.  Is there a
summary somewhere?

Good stuff!  Thanks.

73
Bill - WA7NWP