DAMW: Double Auction Multi-winner Framework for Spectrum Allocation in Cognitive Radio Networks

Under-utilization of wireless spectrum by the licensed owners creates spectrum holes which can be opportunistically exploited by secondary users (SUs). By incorporating dynamic spectrum access techniques, Cognitive Radio (CR) emerges as a novel technology which facilitates redistribution of the spectrum holes dynamically. In this context, this paper proposes a double auction framework for CR networks which addresses the channel allocation problem to boost the spectrum utilization efficiency. Multi-winner allocation relates to the condition where a common channel can be utilized by multiple non-interfering SUs which induces spectrum reuse. However, a single SU obtains at most one channel. To avoid disturbances during data transmission, availability time of a channel plays a key role. In this paper, bid submission from SUs rely on channel availability time, and to lease the idle channels, licensed users specify certain ask values. The proposed double auction mechanism develops winner determination and pricing strategies which are proved to be truthful and significantly improves the usage of the radio spectrum. Network simulations validate the improved performance of the proposed auction model compared to the McAfee auction.