On a Truthful Mechanism for Expiring Spectrum Sharing in Cognitive Radio Networks

We study how truthfulness can be enforced as a dominant strategy when a number of secondary cognitive radios participate in an online expiring spectrum sharing auction, held by the primary to lease its spectrum holes. The types of secondary cognitive radios, announced to the primary, are composed of valuation and arrival-departure periods. We show how, by the suitable choice of channel allocation and pricing schemes, the collusion incentive among secondary cognitive radios can be reduced. The performance of the deployed dynamic auction is compared with that of the Vickrey-Clarke-Groves (VCG) offline auction as a benchmark.