FCC Approves Revised Rules for Safety Use of 5.9 Band
The FCC on Thursday adopted long-awaited final rules for cellular-vehicle-to-everything technology in the 5.9 GHz band. “These rules will improve transportation safety and permit more efficient mobility as this advanced communications technology is integrated into vehicles and infrastructure,” said a news release. FCC Chairwoman Jessica Rosenworcel circulated proposed rules in July.
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The FCC changed the rules for the spectrum in October 2020, reallocating the 5.9 GHz band to sharing between Wi-Fi and C-V2X, with no set-aside for dedicated short-range communications (DSRC), the historical allocation for the spectrum.
“We further address the transition of 5.9 GHz … operations from DSRC to C-V2X by codifying C-V2X technical parameters in the Commission’s rules, including band usage, message priority, and channel bandwidth,” the order said: “We promulgate rules governing equivalent isotropically radiated power (EIRP) and out-of-band emissions (OOBE) limits for C-V2X on-board units (OBUs) and roadside units (RSUs), and antenna height limits for RSUs.”
“The FCC’s efforts to evolve the 5.9 GHz band are a win-win,” Rosenworcel said. “It drives innovation in our wireless and transportation economies and can help keep us safe on our roadways when we walk, ride and drive.”