> We could go from always-on surveillance to letting people decide on a per-notification basis if declaring their location is worth receiving the rest of the message. Or if they should move to a different location before doing so.
Could a similar capability be built on a local LoRA mesh?
LoRA will always have spotty coverage. There might be a lot of spots all over the place, but they're still just little spots. For short messages, you need much lower frequency. Then you can cover entire cities from one or two sites.
You really want something VHF or below. Like a chunk of the former analog TV bands. A really really tiny sliver is enough.
LoRA is a horrifically bandwidth-inefficient protocol. It craps on a gigantic swath of frequencies in order to send a few bits of data. They call it a "chirp", not a "crap". The only reason anybody gets away with such a wasteful modulation scheme is that it happens in the garbage band.
Could a similar capability be built on a local LoRA mesh?