dstates writes: The FCC is considering one of the biggest regulatory changes in decades: allowing a newly available chunk of wireless spectrum to be leased by different users at different times and places, rather than being auctioned off to one high bidder. The plan is to open a new WiFi with spectrum in the 3.550 to 3.650 gigahertz band now used by radar systems. Under the proposed rule to be voted on Wednesday, users could reserve pieces of that spectrum in different regions and at different time managed by a central database. Spectrum sharing is a dramatic change with a potential to make bandwidth accessible to many users. The plan has met with mixed reviews from the cellular carriers.