Wednesday, December 14, 2011

WhiteSpace Alliance Sets Charter

A new WhiteSpace Alliance has been formed with the goal of enabling the emerging worldwide WhiteSpace ecosystem to deliver cost-effective broadband solutions, and support products and services that use WhiteSpace spectrum.


The Alliance is supporting IEEE 802.22 technology, which promises broadband wireless access over a large area up to 100 km from the transmitter. This technology delivers up to 29 Mbps per TV channel, and with over 40 available channels can deliver more than 1 Gbps capacity.


Initial members include AmeriSys, BAE Systems, ETRI, NICT and RelayServices. http://www.whitespacealliance.org




  • In July 2011, The IEEE published the 802.22 standard for Wireless Regional Area Networks (WRANs) using the favorable transmission characteristics of the VHF and UHF TV bands. 802.22 enables broadband wireless access over a large area up to 100 km from the transmitter. The standard specifies up to 22 Mbps per channel without interfering with reception of existing TV broadcast stations, using the so-called white spaces between the occupied TV channels.


    IEEE 802.22 incorporates advanced cognitive radio capabilities including dynamic spectrum access, incumbent database access, accurate geolocation techniques, spectrum sensing, regulatory domain dependent policies, spectrum etiquette, and coexistence for optimal use of the available spectrum. It operates generally in the 54-862 MHz range. For the United States, it specifies the following VHF / UHF Bands54 – 60, 76 – 88, 174 – 216, 470 - 608 and 614 –698 MHz => Total of 282 MHz or 47 Channels.


  • In September 2010, The FCC issued an order that opens up vacant airwaves between TV channels for new unlicensed applications such as "super Wi-Fi." Specifically, a Second Memorandum Opinion and Order (Second MO&O) resolves numerous legal and technical issues regarding unlicensed spectrum usage. Notably, the Order eliminates the requirement that TV bands devices that incorporate geo-location and database access must also include sensing technology to detect the signals of TV stations and low-power auxiliary service stations (wireless microphones). It also requires wireless microphone users who seek to register in the TV bands databases to certify that they will use all available channels from 7 through 51 prior to requesting registration. Requests to register in the database will be public, thus allowing interested parties to weigh in on any given request.


    The FCC order also includes steps to ensure that incumbent services are protected from interference from the use of white spaces in various ways. This includes reserving two vacant UHF channels for wireless microphones and other low power auxiliary service devices in all areas of the country.

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