Notes

WRAN using Cognitive Radio

IEEE 802.22, is a standard for wireless regional area network (WRAN) using white spaces in the television (TV) frequency spectrum.

IEEE 802.22 wireless regional area network
– Is the First Wireless Standard based on Cognitive Radios.
– Covers large rural areas using unused TV channels.
– Coexists with incumbent TV operator using various incumbent user detection and notification methods
– Requires periodic sensing.

• Multiple IEEE 802.22 networks can co-exist in the same area on the same channel.

• IEEE 802.22 will increase the efficiency of utilization of that spectrum, and provide large economic and societal benefits.

The development of the IEEE 802.22 WRAN standard is aimed at using cognitive radio (CR) techniques to allow sharing of geographically unused spectrum allocated to the television broadcast service, on a non-interfering basis, to bring broadband access to hard-to-reach, low population density areas, typical of rural environments, and is therefore timely and has the potential for a wide applicability worldwide.

It is the first worldwide effort to define a standardized air interface based on CR techniques for the opportunistic use of TV bands on a non-interfering basis.

IEEE 802.22 WRANs are designed to operate in the TV broadcast bands while assuring that no harmful interference is caused to the incumbent operation: digital TV and analog TV broadcasting, and low power licensed devices such as wireless microphones.

Khaled Gamal