White Space IEEE 802.22

The IEEE has published a standard for the White Space spectrum to utilize the former unused space between terrestrial television bands to transmit data. There is still a White Space scare after the DC crowd monkeyed with the rules around who can use the spectrum or how its allocated. I guess for now the geeks are undeterred and pushing ahead to try and make a go of it before the politicians and lobbyist carve it up for big business.

From the IEEE press release:

“This new standard for Wireless Regional Area Networks (WRANs) takes advantage of the favorable transmission characteristics of the VHF and UHF TV bands to provide broadband wireless access over a large area up to 100 km from the transmitter. Each WRAN will deliver 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. This technology is especially useful for serving less densely populated areas, such as rural areas, and developing countries where most vacant TV channels can be found.

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.”

I like the language on the working group site: “The charter of IEEE 802.22, the Working Group on Wireless Regional Area Networks (“WRANs”), under the PAR approved by the IEEE-SA Standards Board is to develop a standard for a cognitive radio-based PHY/MAC/air_interface for use by license-exempt devices on a non-interfering basis in spectrum that is allocated to the TV Broadcast Service.”

The core technologies document was published in June of 2010 but I guess is just being released publicly.  (PDF)

Standards overview:

  • Focus-RuralBroadbandWirelessAccess
  • Core Technology – Cognitive radio technology based un-licensed use, primarily designed to operate in the TV Whitespaces from 54-862 MHz, on a non- interfering basis with the primary users (incumbents).
  • Representation–Commercial industry,Broadcasters, Govt., regulators, and Academia
  • Membership–40 on anaverage • Projects–IEEE802.22,IEEE802.22.1,IEEE
  • CONOPS – VHF and UHF band operation allows long range propagation and cell radius of 17 – 33 km. Approx 280 MHz of Bandwidth with 47 TV channels.
  • PHY-Optimized for long channel response times and highly frequency selective fading channels.
  • MAC–Provides compensation for long round trip delays
  • Unique features introduced for Cognitive Radio based operation: spectrum sensing, spectrum management, intra-system co-existence, geo-location and security
  • Mobility and Portability-Portability–IEEE802.22 allows portability (nomadic use). In case the rules do change, IEEE 802.22 PHY is designed to support mobility of up to 114 km/hr (no hand-off is included in the current version).

About Daniel Davenport

Daniel is a digital media executive with internet and broadcast experience. Daniel is currently the executive strategy director at THINK Interactive.

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