“T-Mobile USA is ready to deploy a new LTE technology over the same 5GHz frequencies used by Wi-Fi following U.S. government approval of the first ‘LTE-U’ devices,” reports Ars Technica. “The Federal Communications Commission today authorized the first LTE-U (LTE for unlicensed spectrum) devices after a controversial process designed to ensure that cellular network use of the 5GHz band won’t interfere with Wi-Fi networks.” From the report: LTE-U will help T-Mobile achieve its goal of offering gigabit LTE speeds, the carrier said. Verizon Wireless is also planning to use LTE-U. The company said in September that it is “eager to deploy” the technology and developed an equipment testing plan, but it’s not clear when a Verizon deployment will happen. Cellular carriers in the US generally hold exclusive licenses to spectrum, while Wi-Fi operates in unlicensed frequencies. Anyone can operate in unlicensed spectrum without an FCC license as long as they use certified radio equipment and comply with power limits and other technical requirements. The plan to bring LTE to unlicensed Wi-Fi spectrum set off an industry fight. LTE-U deployment plans drew opposition in 2015 from cable companies and the Wi-Fi Alliance, an industry group that certifies equipment to make sure it doesn’t interfere with other Wi-Fi equipment. Industry groups worked together to develop a “Coexistence Test Plan” to prevent interference, and the Wi-Fi Alliance said it’s satisfied with the result even though the new testing is voluntary rather than required by the FCC.
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