The alert was also not received on my DISH phone, a Project Genesis device that was on native DISH 5G.
On Wed, Oct 4, 2023 at 4:33 PM Nathan Anderson via VoiceOps < [email protected]> wrote: > ...huh. > > > https://cacm.acm.org/magazines/2021/10/255719-securing-the-wireless-emergency-alerts-system/fulltext > > Guess it is delivered over a separate interface to the MME than SMS would > be. > > Kinda boggles the mind that "WEA over IMS" isn't a thing. > > Perhaps it's an issue of scalability? WEA messages over NAS presumably > doesn't require that much overhead: MME sends the message out to all eNBs, > who in turn I'd guess would just indiscriminately transmit it to all > attached UEs. More broadcast-y than unicast-y. Whereas I guess an > IMS-based solution would require the CSCF to enumerate all active > registrations and then transmit a SIP message individually to each > subscriber, one-by-one. > > Still, the lack of at least some IP-based way of accomplishing this seems > like a huge oversight, especially in an age where it seems like more people > (especially in more rural areas) are more reliant on VoWiFi than ever > before in order to have any use whatsoever of their mobile voice service > while at home. > > -- Nathan > > -----Original Message----- > From: VoiceOps [mailto:[email protected]] On Behalf Of Nathan > Anderson via VoiceOps > Sent: Wednesday, October 4, 2023 3:53 PM > To: [email protected] > Subject: Re: [VoiceOps] IPAWS/FEMA National Test - VoWIFI > > Darn...it actually had occurred to me to test this very thing by forcing > airplane mode and then enabling WiFi, but then spaced it and didn't manage > to do that before the broadcast went out! > > Assuming I'd actually managed to run the test, I was actually fully > prepared to be surprised if I had NOT gotten the test broadcast while > exclusively on WiFi Calling. It seems bizarre to me to learn that WEAs are > dependent on the same NAS CP messages that non-IP-based SMS over LTE is > also dependent on...can this really be true?? This is strange because it > would require that all mobile carriers continue to run and maintain a 2G > core, since (as far as I know) SMS can only be encapsulated within LTE NAS > by way of the SGs interface. (Perhaps there is some separate interface > over which WEA payloads specifically are sent to the MME?) > > Some months ago -- but well after the 3G UMTS shutdown had taken place -- > I found that my ability to use SMS on the AT&T network had suddenly broken > in a weird way, and ONLY worked over WiFi. Which was naturally a *wee* bit > inconvenient. After digging into it over a few days, I figured out that > the SMS over IP (IMS) setting in my (non-5G) handset's baseband was > disabled. And apparently this setting is ignored when you are on VoWiFi, > since IMS is literally the only way to deliver SMS over ePDG. I enabled it > & that fixed my problem with SMS over LTE. I did some back-and-forth > testing and every time I re-disabled that baseband setting, SMS over LTE > broke again. I took this all as a sign that AT&T was probably looking to > retire their entire 2G/3G core, though admittedly I haven't tried forcing > the same handset back to SMS-over-SGs since then in order to see if maybe > this was just a temporary (yet prolonged) glitch on their side. > > -- Nathan > > -----Original Message----- > From: VoiceOps [mailto:[email protected]] On Behalf Of Jay R. > Ashworth via VoiceOps > Sent: Wednesday, October 4, 2023 2:08 PM > To: jra > Cc: VoiceOps > Subject: Re: [VoiceOps] IPAWS/FEMA National Test - VoWIFI > > I now have a counter report that the Cellular Control Channel necessary to > get > these alerts to a cellphone *is not proxied by carrier WIFI-connect*, by > design. > > I'm familiar with his credentials, and I'll assume he knows what he's > talking about, > cause *I* know what he's talking about, and he sounds like he's talking > sense. :-) > > Thanks to everyone who responded. > > If you *did* get an alert, *and you know you were not in range of ANY cell > network*, > only WIFI proxy, that wasn't supposed to be possible and I would still > like to hear > about that. > > Cheers, > -- jr 'just zis guy, you know?' a > > ----- Original Message ----- > > From: "Jay R. Ashworth via VoiceOps" <[email protected]> > > To: "VoiceOps" <[email protected]> > > Sent: Wednesday, October 4, 2023 3:25:04 PM > > Subject: [VoiceOps] IPAWS/FEMA National Test - VoWIFI > > > I have a report from a usually reliable source that he did not receive > today's > > IPAWS/CMAS/WEA test message, and he surmises this might be because his > phone > > handset is forced to VoWIFI. I have a number of other reports, mostly > though > > not all, from the broadcast engineering community; nobody reported > expecting > > a CMAS and not getting it, so that's not data here. > > > > Is anyone on the list involved with the FEMA/IPAWS/CMAS link, or knows > someone > > who is, and has a channel to clear this query up through? > > > > I could be unsurprised to find that the carrier VoWIFI proxies missed > out on > > proxying SMS Cell Broadcast, which I gather provides the underlying PHY > for > > CMAS. > > > > Cheers, > > -- jra > > > > -- > > Jay R. Ashworth Baylink > [email protected] > > Designer The Things I Think > RFC 2100 > > Ashworth & Associates http://www.bcp38.info 2000 Land > Rover DII > > St Petersburg FL USA BCP38: Ask For It By Name! +1 727 > 647 1274 > > _______________________________________________ > > VoiceOps mailing list > > [email protected] > > https://puck.nether.net/mailman/listinfo/voiceops > > -- > Jay R. Ashworth Baylink > [email protected] > Designer The Things I Think RFC > 2100 > Ashworth & Associates http://www.bcp38.info 2000 Land > Rover DII > St Petersburg FL USA BCP38: Ask For It By Name! +1 727 647 > 1274 > _______________________________________________ > VoiceOps mailing list > [email protected] > https://puck.nether.net/mailman/listinfo/voiceops > _______________________________________________ > VoiceOps mailing list > [email protected] > https://puck.nether.net/mailman/listinfo/voiceops > _______________________________________________ > VoiceOps mailing list > [email protected] > https://puck.nether.net/mailman/listinfo/voiceops >
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