摘要(英) |
Cognitive radio is a well-known communication paradigm that can significantly improve spectrum utilization by allowing the cognitive radio users (unlicensed users) to dynamically utilize the licensed spectrum. Studying efficient spectrum allocation mechanism is urgent due to this situation. In this paper, we consider a cognitive radio network consisting of a primary spectrum owner (PO), multiple primary users (PU) and multiple secondary users (SU). We propose a sequential posted-price auction mechanism (SPA) for spectrum sharing in cognitive radio networks where the SUs bid to buy spectrum bands from the PO who acts as the auctioneer, selling idle spectrum bands to make a profit and consider a more general and more realistic case where channels have different qualities. Also, SUs are allowed to express their preferences for each channel separately. That is, each SU submits a vector of bids, one for each channel and purchase the spectrum bands under their own budgets. This mechanism will proceed by the Linear Programming Relaxation (LPR) to achieve the high efficiency of the spectrum allocation which involves the economic properties and the budget limit. Finally, we will show some results to show what performance in terms of utility, revenue and social welfare between our work and the previous. |
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