That is not the case in the POCSAG protocol. But maybe the pagers had a duplicate-message-within-short-interval rejection in the firmware. I never actually tested that... Still have some old pagers here but lost interest in this technology.
When you say "mesh" I think of the MESH company and that means Ethernet/802.11. That's different waveform than pagers.
It's possible to have two waveforms in one box but it's not the usual thing to do.
-- Les Cargill
Les,
I used the term "mesh" as a network topology (in contrast to a star topology or hub-and-spoke).
I agree, ham-radio mesh-radio is usually equated to HSMM (i.e. wifi IBSS/adhoc mode) but you can implement the topology on top of every RF layer.
Mesh-networks can be routed (e.g. using oslrd) or flooded. So, in fact, APRS is an example of a flooded mesh network.
The excelent radiohead arduino-library is another example. It supports different kinds of radio-module (covering 2 m, 70 cm and 13 cm ham-band) ... and includes a mesh mode:
And this is where all these ISM-band devices come into play, for two reasons:
- they are "mass-market" so they very cheap
- quite a few of them can be modified to offer modes not legal for ISM-band use, but very much legal if you have a ham-licence. (like wifi on 2.3 Ghz or between 5.65-5.85 Ghz ... or these 2 Watt 433 Mhz modules, ... ).
For me the most fundamental issue here is that this technology offers the possibility to build sollutions, not on "high power / few radio" but "lots of radio @ low power": networks of intelligent nodes.
And I think this is an area where ham-radio still has a lot to learn.
Cheerio! Kr. Bonne.
Yeah, I suspected.
some would be more equal than others :)
*Kewl*
Yeah; I am actually habituated away from those sorts of solutions.
-- Les Cargill
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