This standard specifies the air interface, including the cognitive medium access control layer (MAC) and physical layer (PHY), ofpoint-to-multipoint wireless regional area networks comprised of a professional fixed base station with fixed and portable user terminals operating inthe VHF/UHF TV broadcast bands between 54 MHz to 862 MHz. Keywords: broadband wireless access network, cognitive radio, fixed user terminals, IEEE 802.22, portable user terminals, radio spectrum sensing, regional area network, WRAN standards