Author Topic: What is WRAN....?  (Read 973 times)


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What is WRAN....?
« on: May 26, 2015, 07:59:19 AM »
The IEEE 802.22 Working Group started its activities in 2004 with the aim of achieving a regional radio network. The frequency bands used are primarily the digital dividend, that is to say the frequency bands that will be freed when television will fully and finally digital. In France, it is planned for 2010. In the rest of the world, this should be spread between now and 2015.


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Re: What is WRAN....?
« Reply #1 on: July 09, 2015, 12:31:09 AM »
The initial drafts of the 802.22 standard specify that the network should operate in a point to multipoint basis (P2MP). The system will be formed by base stations (BS) and customer-premises equipment (CPE). The CPEs will be attached to a BS via a wireless link. The BSs will control the medium access for all the CPEs attached to it.

One key feature of the WRAN Base Stations is that they will be capable of performing a cognitive sensing. This is that the CPEs will be sensing the spectrum and will be sending periodic reports to the BS informing it about what they sense. The BS, with the information gathered, will evaluate whether a change is necessary in the channel used, or on the contrary, if it should stay transmitting and receiving in the same one.


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Re: What is WRAN....?
« Reply #2 on: September 15, 2015, 07:31:57 PM »

The IEEE 802.22 standard defines a system for a Wireless Regional Area Network, WRAN that uses unused or white spaces within the television bands between 54 and 862 MHz, especially within rural areas where usage may be lower.

To achieve its aims, the 802.22 standard utilises cognitive radio technology to ensure that no undue interference is caused to television services using the television bands. In this way 802.22 is the first standard to fully incorporate the concept of cognitive radio.