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Article: Research conducted by T. Tandai and co-researchers has updated our knowledge about telecommunications.(Report)
- Article from:
- Telecommunications Weekly
- Article date:
- October 7, 2009
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"Cognitive Radio (CR) is expected to bring about a more flexible wireless communication environment by the efficient utilization of spectrum resources. In this paper, a CR coexisting with IEEE 802.11 Wireless Local Area Networks (WLANs) is proposed," investigators in Kawasaki, Japan report.
"In the Distributed Coordination Function (DCF) access scheme in IEEE 802.11 WLAN, a station (STA) transmits a data frame by executing a random backoff procedure after Distributed Inter Frame Space (DIFS) period, and the destination STA of the data frame responds with Ack frame to the source STA after Short Inter Frame Space (SIFS) period. After the Ack frame is transmitted, ...