Mobile network or internet on Long-Fi?

AI Thread Summary
The discussion centers on the feasibility of using Long-Fi technology for cellular networks, particularly in relation to companies like Tesla potentially leveraging it to connect with the Starlink backbone instead of relying on traditional cellular infrastructure. Key points include the lack of available information on the theoretical maximum bandwidth of Long-Fi, with existing applications like Helium Hotspot offering limited speeds (5 kb/s), which are inadequate for commercial internet or mobile use. The data rates for Long-Fi, based on the LoRaWAN modulation scheme, range from 0.3 kbps to 27 kbps, but actual performance on a loaded network is likely to be much lower. The conversation highlights the challenges of miniaturizing modems for mobile devices and the regulatory constraints on spectrum use, which complicate the potential for higher data rates. Long-Fi may be suitable for low-data-rate applications such as agricultural monitoring and utility metering, but it is unlikely to support voice or video services effectively.
TimeSkip
Messages
44
Reaction score
4
I have a question if it would be possible to have a cellular network on Long-Fi? I have tried searching for information on the theoretical maximum bandwidth of Long-Fi; but, can't find anything. I also am unsure if the idea would be of interest to companies like Tesla to set up a hub connecting to Starlink backbone, and having it operate instead of on the cellular backbone and paying high fees for connectivity. Obstacles would be something like miniaturization of the modem of receiver for a cell phone; but, seemingly for a car it wouldn't be much of a problem.

There are companies like Helium Hotspot that offer such technology for their network; but, have some strange applications to mining bitcoin which make the cost bloated for companies like Tesla to buy them out if possible. As far as I know, Helium Hotspot offers 5 kb/s :(, which would prevent it from commercial internet or mobile use. Does anyone know the theoretical maximum of bandwidth for Long-Fi?

Could someone enlighten me if it makes sense to utilize it for internet or cellular service with the above ambiguities clarified if possible.

Thanks.
 
Physics news on Phys.org
I think it is impossible to determine a "theoretical maximum". Any real-life protocol will be compromise not only because of the underlying physics/engineering but also because you are always restricted to a small part of the available spectrum for licensing reasons . Hence, whereas it might be physically possible to increase the data rate I suspect you need to go outside the license exempt band to see a significant increase in speed.
I believe this is one reason for why there is now a drive to use much higher frequencies where the spectrum is less crowded, the downside is that the range is typically lower for higher frequencies.
 
Last edited:
  • Like
Likes russ_watters
In the simplest terms, the data rate for LoRaWAN (the modulation scheme for LongFi) is from 0.3 kpbs to 27 kbps. But don't expect anywhere near an average 27 kbps per user on a loaded network. Here's a Wikipedia article on it:
https://en.wikipedia.org/wiki/LoRa

Here's a more scholarly article from arxiv.org (a link to a PDF document). I believe this article was later published in IEEE Communications Magazine (Volume: 55, Issue: 9, Sept. 2017), but there's a paywall for the final article. So here's the arxiv.org version, without the paywall: Understanding the Limits of LoRaWAN.

It sounds like it would be a good idea for such things as agricultural monitoring (e.g., monitoring an array of devices that measure soil moisture content), utility metering, smart parking, transportation logistics, and other low data rate applications. I'm not sure if it's up for the task of supporting voice, even with high, vocoder compression (I doubt it is). Video surveillance is right out.
 
Last edited:
collinsmark said:
In the simplest terms, the data rate for LoRaWAN (the modulation scheme for LongFi) is from 0.3 kpbs to 27 kbps. But don't expect anywhere near an average 27 kbps per user on a loaded network. Here's a Wikipedia article on it:
https://en.wikipedia.org/wiki/LoRa

Here's a more scholarly article from arxiv.org (a link to a PDF document). I believe this article was later published in IEEE Communications Magazine (Volume: 55, Issue: 9, Sept. 2017), but there's a paywall for the final article. So here's the arxiv.org version, without the paywall: Understanding the Limits of LoRaWAN.
There's also DASH7?

https://en.wikipedia.org/wiki/DASH7
 
Similar to the 2024 thread, here I start the 2025 thread. As always it is getting increasingly difficult to predict, so I will make a list based on other article predictions. You can also leave your prediction here. Here are the predictions of 2024 that did not make it: Peter Shor, David Deutsch and all the rest of the quantum computing community (various sources) Pablo Jarrillo Herrero, Allan McDonald and Rafi Bistritzer for magic angle in twisted graphene (various sources) Christoph...
Thread 'My experience as a hostage'
I believe it was the summer of 2001 that I made a trip to Peru for my work. I was a private contractor doing automation engineering and programming for various companies, including Frito Lay. Frito had purchased a snack food plant near Lima, Peru, and sent me down to oversee the upgrades to the systems and the startup. Peru was still suffering the ills of a recent civil war and I knew it was dicey, but the money was too good to pass up. It was a long trip to Lima; about 14 hours of airtime...
Back
Top