Expanding Flexible Use of the 3.7 to 4.2 GHz Band

In this document, the Federal Communications Commission (Commission or FCC) adopts a Notice of Proposed Rulemaking (NPRM) to pursue the joint goals of making 3.7-4.2 GHz band spectrum available for new wireless uses while balancing desired speed to the market, efficiency of use, and effectively accommodating incumbent Fixed Satellite Service (FSS) and Fixed Service (FS) operations in the band. The Commission seeks comment on various proposals for transitioning all or part of the band for flexible use, terrestrial mobile spectrum, with clearing for flexible use beginning at 3.7 GHz and moving higher up in the band as more spectrum is cleared. The Commission also seeks comment on potential changes to its rules to promote more efficient and intensive fixed use of the band on a shared basis starting in the top segment of the band and moving down the band.