The FCC also requires that all low-power devices incorporate permanently attached integrated antennas to prevent the potential for users to replace a device’s antenna with a higher gain antenna and the potential for interference. Next are the standard-power APs and they will primarily be used to support outdoor communications in a subset of the 6GHz band, specifically U-NII-5 and U-NII-7 bands.
The maximum EIRP for a standard-power AP will higher, at 36 dBm to support the greater distances typically required for outdoor operation. However, this also increases the chances of 6E interfering with existing users of the 6GHz band, the incumbents. To address this the FCC has mandated spectrum management services be used to protect the licensed incumbent fixed services. So prior to transmitting, a standard-power access point must consult a database to ensure non-interference. This is the new AFC system and will be discussed below.Īs a final device type, the VLP APs, this is mainly focused on allowing the use of 6 GHz Wi-Fi in cars, trains, and other transportation verticals. However, this is still in discussion and nothing has been defined at this time. Ok, back to standard power APs and the requirement for the use of automatic frequency coordination (AFC). So what is AFCs job – For outdoor Wi-Fi communications in the U-NII-5 and U-NII-7 bands, the FCC mandates the use of AFC which is a geolocation database that manages real-time frequency assignments to protect incumbent operations from RF interference. Prior to transmitting, a standard-power access point will consult a local AFC system a list of permissible frequencies or a list of prohibited frequencies on which it cannot transmit. The AFC system will identify the geographic coordinates of the access point, nearby incumbent 6GHz operation, channel/power usage, and will automatically check for possible interference.
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