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Apple/Google don't hold any RF spectrum rights worldwide... This is presumably about 4G/LTE, so mostly between 0.4-2.5 GHz or so. https://en.wikipedia.org/wik

by tpmx 3y ago

Apple/Google don't hold any RF spectrum rights worldwide... This is presumably about 4G/LTE, so mostly between 0.4-2.5 GHz or so. https://en.wikipedia.org/wiki/LTE_frequency_bands https://en.wikipedia.org/wiki/LTE_frequency_bands

Scoundreller 3y ago
> Apple/Google don't hold any RF spectrum rights worldwide... yet. Apple (and android baseband suppliers, “Google” may be the wrong name to mention here), have the ability to take relatively worthless spectrum and make it widely useful in a way nobody else can. I wonder how spectrum allocation works for C-Band satellite broadcasters that just blast continents with their signals. Grandfathered?
- tpmx 3y ago
  Those several-GHz bands don't really work indoors.
  - Scoundreller 3y ago
    Most satellite-y things don’t and Starlink’s direct to cell won’t either. Hence why the spectrum should be pretty cheap (along with its incredible susceptibility to obstructions… which is less of an issue when you’re going roughly “up” without pesky considerations like curvature of the earth) And you do get a ton of gain with a small antenna at those high frequencies.
    - tpmx 3y ago
      > and Starlink’s direct to cell won’t either I could see it kinda working, at low frequencies. They are not that far away and there's not many things blocking the signal besides your roof.
      - Scoundreller 3y ago
        Me too, but at slower data rates. At 550km above, that’s still a big signal loss by inverse square law. Problem with slow data rates is that they clog up the channels.
        tpmx 3y ago
        The inverse square law effect can be remedied using similar tech as in the Starlink consumer antennas. You aim the signal to where it's consumed. > Problem with slow data rates is that they clog up the channels. Yes, we must protect the tubes! :)
        Scoundreller 3y ago
        Phased arrays work without having to repoint, but they don't overcome lack of incidence (insolation?) (e.g. we can't build a solar panel that works perpendicular to the sun (or nearly perpendicular) using phased array technology because there just isn't much solar radiation hitting the "dish" in the first place)
lxgr 3y ago
I wouldn't be surprised if Apple were to end up buying Globalstar, which would get them access to valuable globally available L-band spectrum. They have already invested hundreds of millions into Globalstar's ground station hardware [1] and future satellite launches [2]. [1] https://www.apple.com/newsroom/2022/11/emergency-sos-via-satellite-made-possible-by-450m-apple-investment/ https://www.apple.com/newsroom/2022/11/emergency-sos-via-sat... [2] https://spacenews.com/apple-loans-globalstar-252-million-for-satellite-enabled-iphones/ https://spacenews.com/apple-loans-globalstar-252-million-for...

by tpmx 3y ago

Scoundreller 3y ago

> Apple/Google don't hold any RF spectrum rights worldwide... yet. Apple (and android baseband suppliers, “Google” may be the wrong name to mention here), have the ability to take relatively worthless spectrum and make it widely useful in a way nobody else can. I wonder how spectrum allocation works for C-Band satellite broadcasters that just blast continents with their signals. Grandfathered?

tpmx 3y ago
Those several-GHz bands don't really work indoors.
- Scoundreller 3y ago
  Most satellite-y things don’t and Starlink’s direct to cell won’t either. Hence why the spectrum should be pretty cheap (along with its incredible susceptibility to obstructions… which is less of an issue when you’re going roughly “up” without pesky considerations like curvature of the earth) And you do get a ton of gain with a small antenna at those high frequencies.
  - tpmx 3y ago
    > and Starlink’s direct to cell won’t either I could see it kinda working, at low frequencies. They are not that far away and there's not many things blocking the signal besides your roof.
    - Scoundreller 3y ago
      Me too, but at slower data rates. At 550km above, that’s still a big signal loss by inverse square law. Problem with slow data rates is that they clog up the channels.
      - tpmx 3y ago
        The inverse square law effect can be remedied using similar tech as in the Starlink consumer antennas. You aim the signal to where it's consumed. > Problem with slow data rates is that they clog up the channels. Yes, we must protect the tubes! :)
        Scoundreller 3y ago
        Phased arrays work without having to repoint, but they don't overcome lack of incidence (insolation?) (e.g. we can't build a solar panel that works perpendicular to the sun (or nearly perpendicular) using phased array technology because there just isn't much solar radiation hitting the "dish" in the first place)

lxgr 3y ago

I wouldn't be surprised if Apple were to end up buying Globalstar, which would get them access to valuable globally available L-band spectrum. They have already invested hundreds of millions into Globalstar's ground station hardware [1] and future satellite launches [2]. [1] https://www.apple.com/newsroom/2022/11/emergency-sos-via-satellite-made-possible-by-450m-apple-investment/ https://www.apple.com/newsroom/2022/11/emergency-sos-via-sat... [2] https://spacenews.com/apple-loans-globalstar-252-million-for-satellite-enabled-iphones/ https://spacenews.com/apple-loans-globalstar-252-million-for...