基于步进拍卖的认知无线网络动态频谱分配

动态频谱分配是认知无线电网络的关键技术之一,主要关心频谱拥有者如何将其空闲频谱动态地分配给二级用户.提出了一种基于拍卖理论的动态频谱分配模型--多卖家步进拍卖模型,其中频谱拥有者作为拍卖人,二级用户作为竞买人,其基本过程为:每个拍卖人从底价逐步抬高自己的频谱价格,每个竞买人决定是否购买频谱以及购买哪个拍卖人的频谱.所提方法的特点是:①分布式执行,复杂度很低;②频谱拥有者之间不需要信息交互,二级用户之间也不需要信息交互,节省信令开销;③最终的频谱分配结果近似于全局最优.

Dynamic spectrum allocation in cognitive radio networks based on multi-auctioneer progressive auction

Dynamic spectrum access (DSA) is a promising paradigm to achieve efficient utilization of spectrum resources by allowing unlicensed users (i. e. , secondary users, SUs) to access the licensed spectrums. A key issue in DSA is how to assign the idle spectrum bands of multiple primary spectrum owners (POs) among the SUs. A Multi-Auctioneer Progressive spectrum auction mechanism (MAP) based on the auction theory is proposed, where the POs act as the auctioneers and SUs act as the bidders. In MAP, each auctioneer systematically raises the price and each bidder subsequently chooses one auctioneer for bidding. It's shown analytically that MAP converges to an equilibrium where spectrum utilization is maximized. It's further shown that MAP dynamic spectrum access is low in complexity and traffic overhead.