Few techies around the World to keep on configuring the likes of Rfinder or custom solutions. We don't really want a World where the Government or Elon Musk must help. If say the texting or transactions can be done in millisecond bursts with frequency hopping no need for a Government radio license. All this with a calling scheme etc no need for a phone number. Brave new World.
Can it go Transatlantic? Africa to Hong Kong or Australia? Just a matter or experimentation. Not that the ordinary links are down
On Wednesday, November 1, 2023 at 04:49:31 PM GMT+3, Stewart Bryant <stewart.bryant@xxxxxxxxx> wrote:
On 31 Oct 2023, at 16:31, Nyagudi Musandu Nyagudi <nyagudim=40yahoo.com@xxxxxxxxxxxxxx> wrote:There is an experiment on YouTube where two people using simple Baofeng UV5 walkie talkies, software modems and Internet software conduct a peer to peer data transfer from Europe to the USA. The experiment is important to the extent that it runs on the margins of known Physics as UV5R works on VHF/UHF Band with a simple 5 watts.A growing number of smartphone apps can switch from Ham Radio, Satellite Bands, and peer-to-peer as well as other networks.Suffice it to say that the Users may not be interested on whether it is long range peer to peer or DMRoIP, if Artificial Intelligence can generate and maintain a multifaceted datalink including Load Balancing where possible, and simply inform you on what you can use the link for eg Texting or VoiceNyagudi Musandu Nyagudi
There was an off-list comment that I received suggesting that VHF is only line of site. I know that is what they teach in elementary communications classes, but it is not quite like that.
There are various propagation modes that enhance the range, such as tropospheric ducting and aircraft scatter. Then power and antenna gain are everything.
For example if you look here
https://www.rsgbcc.org/cgi-bin/vhfresults.pl?Contest=VHF%20NFD&year=2023#sa and click the 144 tab about half way down you can see that the longest distance on 144MHz (ODX) is is up to about 1000Km. That is beyond LoS but way short of a transatlantic distance. These are highly optimised stations running at least 400W to a well sited antenna usually with a gain of over 20dB - ie an ERP of 40KW, and this is using SSB or CW which is better than FM over weak signal paths. A UV5 out of the box is 5W FM with a gain of close to 0db it has a useful range of about 20 miles depending on terrain.
There are specialist modes that can do better but here we are talking of bandwidths of the order of a few 10s of bits per minute.
There are some transatlantic VHF beacons that have been deployed. I am not sure if they have been received across the Atlantic yet, but if they have it is the result of a rare anomalous propagation event.
The OP refers to DMRoIP. I am not sure what that is, but I think this is DMR VHF to a gateway and then connecting via the Internet. The UV5 cannot do DMR. The UV5 could connect to a data gataway and then onto the Internet but there is no way radios of its general type can make the long path across the Atlantic on its own as the reader would have been led to believe.
There is also no need for AI to do multilink and load balancing there are “ordinary” technologies that can do that and are widely deployed.
Best regards
Stewart/G3YSX
