At its most recent meeting, on October 23, the FCC voted unanimously to move forward with the allocation of an additional 1.2 GHz of unlicensed spectrum in the 6 GHz band (5.925-7.125 GHz). As elsewhere in the spectrum, the US regulator is running out of virgin airwaves and needs to adopt creative solutions to allow wireless broadband services to coexist with incumbent users, without interference. The most complex system has been adopted in the 3.5 GHz CBRS band, which has three tiers of access including unlicensed, and relies on a series of spectrum access systems (SASs) to allocate vacant channels. In the 6 GHz band, the main existing users (in the 5.925-6.425 GHz and 6.525-6.875 GHz portions) are operators of…