NTIA Provides Views on 5.9 GHz Rules
NTIA offered additional comment on cellular vehicle-to-everything and Wi-Fi use of the 5.9 GHz band, in a filing posted Monday in docket 19-138. NTIA urged the FCC to adopt power limit rules for C-V2X on-board units (OBUs) “that provide for…
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optional use of ‘geofencing’ techniques.” NTIA proposed allowing equivalent isotropic radiated power (EIRP) of 33 dBm for OBUs “with geofencing capability operating outside a coordination zone.” The units should be limited to 23 or 27 dBm depending on the location without geofencing capability, NTIA said. The FCC reallocated the 5.9 GHz band for use by Wi-Fi and C-V2X in late 2020 after a prolonged fight, with DOT arguing the entire 75 GHz should remain set aside for automotive safety (see 2011180043) but has yet to adopt final rules.