Adaptive channel allocation spectrum etiquette for cognitive radio networks
Mobile Networks and Applications
Enhancing cognitive radio systems with robust reasoning
International Journal of Communication Systems
International Journal of Sensor Networks
Stochastic Traffic Engineering in Multihop Cognitive Wireless Mesh Networks
IEEE Transactions on Mobile Computing
Cooperative spectrum sensing with imperfect feedback channel in the cognitive radio systems
International Journal of Communication Systems - Part 1: Next Generation Networks (NGNs)
International Journal of Communication Systems
An overview of configurable computing machines for software radio handsets
IEEE Communications Magazine
The software radio architecture
IEEE Communications Magazine
Cognitive radio: brain-empowered wireless communications
IEEE Journal on Selected Areas in Communications
Spectrum sharing for unlicensed bands
IEEE Journal on Selected Areas in Communications
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In IEEE 802.22 wireless regional area networks (WRAN), it is indispensable to prevent the in-use channel from interfering with incumbent services such as digital TV. To achieve this end, in this paper, we propose a dynamic frequency hopping based on rank accounting. In this method, a base station utilizes a ranking database where a rank of a channel which is used frequently is high. Each base station uses an idle channel whose rank is the highest based on the database, and hence this can reduce the number of channels which are used for the data transmission. Moreover, the proposed method performs interference avoidance processes. The proposed method does not require a strict coordination for base stations. We evaluate the performance of the proposed method with simulation. Numerical examples show that the failure probability of the channel switching for the proposed method is smaller than that for the conventional random method. It is also shown that the number of channels that are used for the data transmission can be reduced by using the proposed method. Finally, we investigate the performance of the proposed method in some situations. Copyright © 2011 John Wiley & Sons, Ltd.