Wireless providers in the U.S. and Canada use different spectrum for their 5G deployments, and Canada already has measures in place to address the issue of interference
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The potential airport interference from 5G rollouts in the United States that led some flights to be cancelled isn’t an issue in Canada, experts say.
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Wireless providers AT&T and Verizon have reached a last-minute deal to temporarily delay deployment of hundreds of 5G cell towers near U.S. airports, but a long-term solution will still have to be worked out.
In the United States, the 5G towers broadcast on frequencies close to those used by radar altimeters, which help aircraft land in poor weather, leading to some flights being cancelled over safety concerns.
Canada isn’t facing the same problem because wireless providers in the U.S. and Canada use different spectrum for their 5G deployments, and the Canadian government has already put measures in place to address the issue of interference.
John Gradek, a lecturer at McGill University who specializes in commercial aviation management issues, said Canada has “a pretty good handle in terms of what the risk is associated with full 5G deployment.”
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In the U.S., there’s a “little bit of a tug of war about who calls the shots” between the aviation industry and telecom industry, and the two are currently in a standoff, he said.
But in Canada, Gradek said, the “system is pretty well under control.”
Gradek said U.S. wireless providers use so-called C-band spectrum – the airwaves on which wireless signals travel – which is in the 3700 MHz range and above.
In Canada, telecoms are currently using 3500 MHz spectrum for their 5G rollouts. Innovation, Science and Economic Development Canada (ISED) put out regulations that included mitigation measures for that spectrum back in November, said David Farnes, general manager of the Radio Advisory Board of Canada.
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He said after the 3500 MHz spectrum was auctioned off last year, “as this issue of potential interference was emerging or getting louder, the department quickly held a consultation and made the decision to impose more restrictive measures on the telecom operators,” he said.
That includes establishing an exclusion zone near airports, “meaning you can’t turn on an antenna near an airport,” and rules about how antennas can be tilted.
“The operators in Canada couldn’t turn on a system and operate the same way that the U.S. operators could,” Farnes said.
ISED has “taken a pretty conservative approach in terms of the mitigation measures they put in place.”
Canadian telecom providers will begin using C-band spectrum in the coming years – ISED is planning to hold an auction for 3800 MHz spectrum in 2023.
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Farnes noted that in its consultation on that spectrum auction, ISED asked about the issue of airport interference and mitigation measures. He added that his organization has also put together a working group that includes telecom operators, equipment manufacturers and representatives from airlines and airplane manufacturers.
A spokesperson for ISED said the department designed its technical rules “to ensure that 5G is deployed in a manner that minimizes the potential for interference to radio altimeters.”
The spokesperson added that “ISED continues to study this issue, and it is expected that as new information and studies become available, and as new radio altimeter standards are developed internationally, these measures may be modified or relaxed.”
— With additional reporting by Bloomberg
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2022-01-20 11:04:43Z
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