US telecommunications companies and airlines have struggled for weeks during the potential impact of 5G wireless services on airplanes, in contrast to the launch of new generation services elsewhere, which has extended without turning on new safety problems.
Here are some backgrounds in disputes, where Verizon Communications and AT & T agree on Monday to a two-week delay in using a newly obtained wireless spectrum, pulling back from a threatening deadlock will interfere. Agreement promised to prevent most, but not all, potential interference on air travel from the spread of 5G
What is the problem?
The US middle class bandwidth auctioned into a cellphone company in early 2021 in the range of 3.7-3.98 GHz in the spectrum, known as the C-band, around $ 80 billion.
U.S. The aviation industry group in recent months increases fears and administration of Federal flight (FAA) issued formal warnings in November the risk of disruption with aviation equipment.
In the aviation industry, the radar altimeter, which measures heights, operates in the range of 4.2-4.4 GHz and there is concern that there is no large buffer from the frequency that will be used by telecommunications companies.
The company has faced pressure from the White House, airlines and airlines to delay the spread amid concerns about the potential of 5G disorders with sensitive electronic aircraft such as radio altimeter.
Why is potentially important for flights?
Radio altimeter helps minimize the risk of accidents or collisions by providing accurate readings about proximity to the ground. The reading is also used to facilitate automatic landing and to help detect a harmful current called Windshear.
What is the difference between frequency?
In short, the higher the frequency in the spectrum, the faster service. So to get full value from 5G, the operator wants to operate at a higher frequency.
Some of the C-band spectrums are auctioned in the United States have been used for satellite radio but the transition to 5G means there will be more traffic.
Is this a problem elsewhere?
After years of international discussions, the European Union in 2019 set a standard for the 5G frequency of the middle class in the range of 3.4-3.8 GHz.
They have been auctioned and used in many block member countries so far without problems.
The European Union Flight Safety Agency (EASA), which oversees 31 countries, said on December 17, this last discussion was specialized in the airspace A.S. “At this stage, there is no risk of unsafe interference has been identified in Europe,” he said.
AT & T and Verizon have agreed to adopt the exclusion zone in many airports M.S. Similar to those used in France for six months.
FAA officials note the spectrum used by France (3.6-3.8 GHz) is located further from the spectrum (4.2-4.4 GHz) used for radio altimeters than in the United States and the level of French power for 5G is also lower From what the United States is authorized.
But Verizon said it would not use a closer spectrum than France used for several years.
In South Korea, 5G cellular communication frequency is a 3.42-3.7GHz band and there has been no reports of disturbances with radio waves since the commercialization of 5G in April 2019.
At present, the 5G cellular communication wireless station operates near the airport, but there has been no problem report.
CTIA, the US Wireless Trade Group, said in submission of the Federal Communication Commission “wireless operators in almost 40 countries in Europe and Asia are now using C-band for 5G, without the effects reported on radio altimeters operating in the same case. Set International 4.2-4.4 GHz band. “
It adds “every day of the US aircraft, carrying thousands of US citizens, landing in these countries without incidents and without expression of concerns by FAA or foreign flight regulators. This is a classic dog that does not bark. Physics law is not different in the United States
