What problems are you referring to? As far as I aware US seems to be doing fine, other than have a different mmWave strategy than rest of the world. If you are asking about aviation and specific spectrum, they are tiny if not irrelevant in the grand scheme of things.
Europe has a quite different mobile telco landscape, and avoided certain issues (like aviation impact) from start instead of pushing into dangerous ground.
This means both a more level playing field and a lot more competition, but also less regulatory issues like USA has with 3.8-3.98GHz spectrum.
The spectrum is different in Europe and might be one reason why there are fewer problems in Europe. And the aviation impact was taken into account. Deployment was more of a joint effort...
Europe Has 5G. Here Is Why It Hasn’t Messed Up the Airlines.
One thing is for sure: a green light for 5G in Europe doesn’t come from a lack of caution among regulators. After all, the European Union Aviation Safety Agency (EASA) last month warned about the potential risk of interference from 5G near airports—in the U.S.
The EASA said at the time that “no risk of unsafe interference has been identified in Europe.” Instead, the regulator cited the Federal Aviation Administration, which saw specific risk in the U.S. due to the implementation of potentially higher 5G ground station power emissions early this year.
[..]
George Holmes, the chair and CEO of Resonant (RESN) a 5G industry player, told Barron’s that the difference between the U.S. and Europe stems from allocated frequencies for 5G, and their proximity to the defined band for altimeters.
Resonant is a Nasdaq-listed company that designs radio frequency filters, which are used to isolate signals from the right band while blocking unwanted noise from elsewhere in the radio spectrum. These filters are critical in 5G applications.
In the U.S., 5G is allocated to a range of between 3.7GHz and 3.98GHZ, which is closer to the 4.2GHz-4.4GHz frequency for altimeters than in Europe, which has allocated the 3.4GHz-3.8GHz range for 5G. Holmes said that in Europe altimeter filters will be better at stopping 5G signals, which will result in less potential interference.
Europe rolled out 5G without hurting aviation. Here's how
Why is there a potential problem in the United States, but not Europe? It comes down to technical details.
Mobile phone companies in the United States are rolling out 5G service in a spectrum of radio waves with frequencies between 3.7 and 3.98 GHz. The companies paid the US government $81 billion in 2021 for the right to use those frequencies, known as the C-Band. But in Europe, 5G services use the slower 3.4 to 3.8 GHz range of spectrum.
The aviation industry is worried that US 5G service is too close to the spectrum used by radar altimeters, which is between 4.2 and 4.4 GHz. Europe does not face the same risk, according to the industry, because there is a much larger buffer between the spectrum used by radar altimeters and 5G.
What France did
There are other differences in how 5G is being rolled out, according to the US Federal Aviation Administration (FAA). Some countries are using lower power levels, restricting the placement of 5G antennas near airfields and requiring them to be tilted downward to limit potential interference with aircraft.
In France — cited by telecom carriers such as AT&T (T) and Verizon (VZ) as an example of 5G and aviation working seamlessly together — the height of a 5G antenna and the power of its signal determine how close it is allowed to a runway and the flight path of an aircraft, according to a technical note from France's National Frequency Agency (ANFR).
Antennas around 17 major French airports are also required to be tilted away from flight paths to minimize the risk of interference, the agency's director of spectrum planning and international affairs, Eric Fournier, told CNN.
Sort of unrelated, but I'm surprised aircraft need that spectrum. I'm not an expert, but my impression was that using lower frequency has lower speeds but longer range and less sensitive to interference. This seems better for the aircraft usecase.
The answer could be just that they were built using this spectrum which at the time seemed fine, and now that we want to use it for something else it's an issue. Curious if anyone knows more.
Because the FCC sold off an infrequently used guard band adjacent to that used by Radar Altimeters, for use by the 5G providers, which was an incredibly bad idea, with predictably awful, and life endangering results.
The root cause is the idea that we should "sell" the airwaves to cell phone providers. It's a tax on us users, and leads to bad outcomes like this one.
5G already uses a wide range of frequencies, they didn't need this particular band.
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This means both a more level playing field and a lot more competition, but also less regulatory issues like USA has with 3.8-3.98GHz spectrum.
https://www.barrons.com/articles/5g-europe-airlines-51641398...
Europe Has 5G. Here Is Why It Hasn’t Messed Up the Airlines.
One thing is for sure: a green light for 5G in Europe doesn’t come from a lack of caution among regulators. After all, the European Union Aviation Safety Agency (EASA) last month warned about the potential risk of interference from 5G near airports—in the U.S.
The EASA said at the time that “no risk of unsafe interference has been identified in Europe.” Instead, the regulator cited the Federal Aviation Administration, which saw specific risk in the U.S. due to the implementation of potentially higher 5G ground station power emissions early this year.
[..]
George Holmes, the chair and CEO of Resonant (RESN) a 5G industry player, told Barron’s that the difference between the U.S. and Europe stems from allocated frequencies for 5G, and their proximity to the defined band for altimeters.
Resonant is a Nasdaq-listed company that designs radio frequency filters, which are used to isolate signals from the right band while blocking unwanted noise from elsewhere in the radio spectrum. These filters are critical in 5G applications.
In the U.S., 5G is allocated to a range of between 3.7GHz and 3.98GHZ, which is closer to the 4.2GHz-4.4GHz frequency for altimeters than in Europe, which has allocated the 3.4GHz-3.8GHz range for 5G. Holmes said that in Europe altimeter filters will be better at stopping 5G signals, which will result in less potential interference.
https://edition.cnn.com/2022/01/19/business/5g-aviation-safe...
Europe rolled out 5G without hurting aviation. Here's how
Why is there a potential problem in the United States, but not Europe? It comes down to technical details.
Mobile phone companies in the United States are rolling out 5G service in a spectrum of radio waves with frequencies between 3.7 and 3.98 GHz. The companies paid the US government $81 billion in 2021 for the right to use those frequencies, known as the C-Band. But in Europe, 5G services use the slower 3.4 to 3.8 GHz range of spectrum.
The aviation industry is worried that US 5G service is too close to the spectrum used by radar altimeters, which is between 4.2 and 4.4 GHz. Europe does not face the same risk, according to the industry, because there is a much larger buffer between the spectrum used by radar altimeters and 5G.
What France did
There are other differences in how 5G is being rolled out, according to the US Federal Aviation Administration (FAA). Some countries are using lower power levels, restricting the placement of 5G antennas near airfields and requiring them to be tilted downward to limit potential interference with aircraft.
In France — cited by telecom carriers such as AT&T (T) and Verizon (VZ) as an example of 5G and aviation working seamlessly together — the height of a 5G antenna and the power of its signal determine how close it is allowed to a runway and the flight path of an aircraft, according to a technical note from France's National Frequency Agency (ANFR).
Antennas around 17 major French airports are also required to be tilted away from flight paths to minimize the risk of interference, the agency's director of spectrum planning and international affairs, Eric Fournier, told CNN.
The answer could be just that they were built using this spectrum which at the time seemed fine, and now that we want to use it for something else it's an issue. Curious if anyone knows more.
https://en.wikipedia.org/wiki/Radar_altimeter
The root cause is the idea that we should "sell" the airwaves to cell phone providers. It's a tax on us users, and leads to bad outcomes like this one.
5G already uses a wide range of frequencies, they didn't need this particular band.