U.S. seeks new 5G delay to study interference with planes – Japan Today

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U.S. authorities have asked telecom operators AT&T and Verizon to delay for up to two weeks their already postponed rollout of 5G networks amid uncertainty about interference with vital flight safety equipment.
The two companies said Saturday they are reviewing the request.
The U.S. rollout of the high-speed mobile broadband technology had been set for December 5, but was delayed to January 5 after aerospace giants Airbus and Boeing raised concerns about potential interference with the devices planes use to measure altitude.
U.S. Transportation Secretary Pete Buttigieg and the head of the Federal Aviation Administration, Steve Dickson, asked for the latest delay in a letter sent Friday to AT&T and Verizon, two of the country’s biggest telecom operators.
The U.S. letter asked the companies to “continue to pause introducing commercial C-Band service” — the frequency range used for 5G — “for an additional short period of no more than two weeks beyond the currently scheduled deployment date of January 5.”
Asked by AFP for comment, Verizon spokesman Rich Young replied, “We’ve received the government’s letter after 6 p.m. on New Year’s Eve. We’re in the process of reviewing it.”
AT&T also said it was reviewing the government request.
In the letter, the U.S. officials assure the companies that 5G service will be able to begin “as planned in January with certain exceptions around priority airports.”
The officials say their priority has been “to protect flight safety, while ensuring that 5G deployment and aviation operations can co-exist.”
Last February, Verizon and AT&T were authorized to start using 3.7-3.8 GHz frequency bands as of December 5, after obtaining licenses worth tens of billions of dollars.
But when Airbus and Boeing raised their concerns about possible interference with airplanes’ radio altimeters — which can operate at the same frequencies — the launch date was pushed back to January.
The FAA requested further information about the instruments, and it issued directives limiting the use of altimeters in certain situations, which sparked airline fears over the potential costs.
When Verizon and AT&T wrote to federal authorities in November to confirm their intention to start deploying 5G in January, they said they would take extra precautions beyond those required by U.S. law until July 2022 while the FAA completes its investigation.
The conflict between 5G networks and aircraft equipment led French authorities to recommend switching off mobile phones with 5G on planes in February.
France’s civil aviation authority said interference from a signal on a nearby frequency to the radio altimeter could cause “critical” errors during landing.
Nah, 5G interference with planes is just a conspiry theory.
Nah, 5G interference with planes is just a conspiry theory.
Jeff, read the details in the link below. You are probably not a commercial rated pilot with a lot of experience using radar altimeters. There are situation where a safe approach and landing rely on accurate information from the radalt. Helicopters I flew relied an the radalt for low their low visibility automatic approach and hover capability, which we needed for hoisting survivors during search and rescue operations. The pilots of passenger aircraft have an automatic couple approach feature to allow them to land in very bad weather but the decision to land or go around at what is called Decision Height or DH, where the pilot needs to have the runway environment in sight or the approach is aborted, relies on accurate radalt information.
https://www.icao.int/safety/FSMP/MeetingDocs/FSMP%20WG11/IP/FSMP-WG11-IP08_ICAO%20Flight%20Operations%20Panel%20and%20IATA%20%20IFALPA%205G%20problem%20statement.pdf
I wonder if they will use this to further limit air travel.
The conflict between 5G networks and aircraft equipment led French authorities to recommend switching off mobile phones with 5G on planes in February
.
Anytime i flew in the past, i always turned off my phone
That was one of the things the airlines had on their information.
I even took the battery out.
That was almost 18 years ago.
.
If i was to fly now, i would automatically turn off my phone before boarding.
Despite he operating frequency ranges of the two technologies being more than 2 GHz apart this potential conflict has been known about for a long time and should have been dealt with by now by improving filtering of the transmitted 5G signal, and any harmonics, so that its passband is effectively kept within the designated upper and lower cutoff frequencies. Selectivity of the radar altimeters should have been improved so that they cannot receive signals of any significant strength outside their own frequency range.
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