The Federal Communications Commission on Wednesday launched the agency's first high-band 5G spectrum auction as it works to clear space for next-generation faster networks.

Bidding is beginning on Wednesday on spectrum in the 28 GHz band and will be followed by bidding for spectrum in the 24 GHz band. The FCC is making 1.55 gigahertz of spectrum available and the auctions will be followed by a 2019 auction of three more millimeter-wave spectrum bands — 37 GHz, 39 GHz, and 47 GHz.

"These airwaves will be critical in deploying 5G services and applications," FCC Chairman Ajit Pai said on Wednesday, who disclosed the planned auction in February.