—A trio of Tokyo-based
technology developers have created a prototype white-space device based on the
IEEE 802.22 Wireless Regional Area Network standard. The National Institute of Information
and Communications Technology, Hitachi Kokusai Electric and ISB Corp., said
they have developed IEEE 802.22 base station and consumer-premise device prototypes
that operate in TV white spaces at 470 - 710 MHz.
The consortium notes that the device could be used to provide broadband in
unserved and underserved areas and a backup channel for emergency
communications. The United States, the United Kingdom and Japan all have
white-space initiatives to deploy unlicensed devices on unoccupied TV channels.
NICT, Hitachi and ISB said IEEE 802.22 systems have “10 times” the coverage of
Wi-Fi, and are reliable for backup provision of broadband communications during
Hitachi developed the physical layer that allows the devices to work in white
spaces. NICT developed the medium-access control layer that provides the
point-to-multipoint access, cognitive interference estimation, geo-location and
white-space database access over Internet Protocol. ISB Corp. is providing the
indicates which TV frequencies are no occupied by TV stations or other licensed
NICT, Hitachi and ISB said they intend to develop “enhanced technologies based on
the IEEE 802.22 standard and also work closely with White Space Alliance
to provide products
for worldwide markets.” They intend to demonstrate the prototypes at the Super
WiFi Summit in Miami, taking place Jan. 30 to Feb. 1.