this post was submitted on 10 Oct 2023
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I totally agree we can't simply drop SMS immediately, but what am I missing in supporting backwards compatibility (for example via my pseudo number solution, like how VOIP works) preventing us from moving forward during a stagged shutdown in the span of decades? MMS and RCS both would also fail under cellular data loss, and SMS itself hasn't always been available during major disasters. I'm not sure I buy the argument you can't have similarly low energy towers (even with net neutrality states, you can still cap all bandwidth per user), and a simpler tower that only does data should be far more reliable than a tower that provides multiple carrier services given the simplicity (and it's very rare to have towers that only do voice + SMS anymore).
Neither has running water or electricity. And SMS isn't actually the last fall-back (over here), that's FM radio which has better reach and crank-powered receivers start at like 10 bucks. Also there's a ton of generator-powered receivers around (called cars). Oh, dang, no, that's not actually the last fall-back that'd be megaphone trucks and cars practically all emergency service vehicles have some kind of PA system.
Solar storm killed the electrics of the new vehicles? There's a 60-year old Unimog still standing around getting moved once a year to keep it operational and I bet you'll find an analog megaphone in storage somewhere. It's astonishing how little stuff gets thrown away, we once stumbled across a stash of field telephones, half of them with swastikas ground off, the others still intact. Those require a crank and a copper cable to operate, nothing more. We used them to organise parking for a summer camp before the days of mobile flatrates.
The actual upside of plain ole GSM is that practically everyone carries around a receiver all the time, and there's reception literally everywhere. Better reach and better signal bandwidth than sirens, though of course nothing beats the oh fuck oh fuck hear it in your marrow aspect of sirens.
Catastrophe relief isn't an area where you ever want to have a single strategy because absolutely nothing is 100% fail-safe. In principle something like TETRA would be better than GSM but civilian phones don't speak it. (TETRA uses mesh networking, you can do direct handset to handset calls, drive around base stations in trucks to extend reach, etc)
Great points!
I don't know for certain. But one point to consider is that you have to qualify your “simply” statements with the fact that we are talking about millions of towers and hundreds of millions of repeaters over millions of square miles. While RCS works on top of the backbone that's already there and fallsback to SMS by design. So it might actually be simpler. The big up is that the server is on the carrier, not centralized, which makes it entirely different than what you are talking about and giving it more resilience.
There is so much nonsense being said about RCS, it will not fail under "cellular data loss".