My Insanely Long Field Guide To The C-Band Spectrum Fight, And Why This Won’t End In December.

The C-Band is a slice of spectrum that in the US that lies between 3.7 GHz and 4.2 GHz. When first authorized for commercial satellite use back in the day, these frequencies were considered far too high to have much value for terrestrial use. These days, of course, 3.7 GHz is considered prime “midband” spectrum perfect for mobile 5G deployment, and sits right on top of the CBRS spectrum the Federal Communications Commission intends to auction next June. So wireless carriers want the FCC to repurpose some or all of it for 5G. In addition, a bunch of folks (including my employer Public Knowledge) support opening up portions of the band in rural areas for point-to-point backhaul (on a secondary basis, which means the backhaul guys need to protect the incumbents from interference). The logic and straightforward thing to do would be to treat this like we did the 700 MHz auction/DTV transition over ten years ago. Tell the C-Band guys “sorry guys, we’re shrinking your available spectrum from 500 MHz to 200 MHz and taking back the other 300 MHz for auction. We’re also going to allow point-to-point backhaul on a non-interfering basis because that will really help rural ISPs. Don’t worry, we’ll set aside some of the auction money for a transition fund.” Sure, the incumbent licensees would scream (they always do), but this is a fairly proven solution that worked well to get us spectrum fro 4G (and raised $20 bn for the Treasury) so why not do it again?