In Tokyo, the National Institute of Information and Communications Technology, Hitachi Kokusai Electric and ISB have developed prototypes of base station and customer premises equipment (CPE) based on the IEEE 802.22 standard operating in TV White Spaces (TVWS) (470 MHz - 710 MHz). The developed prototypes are designed to provide broadband wireless access to underserved and unserved regional areas around the world, as well as backup broadband communications in emergency.