WRAN中基于拍卖理论的频谱分配

Spectrum Allocation Based on Auction Theory in WRAN

本文将WRAN中电视广播台与认知用户之间的频谱分配过程建模为连续双向拍卖,通过该机制,有空闲电视频段的电视台可以将频谱出售给认知用户,由认知基站充当频谱经纪人。在频谱分配过程中,作为主用户的电视广播台和认知用户依据以往的历史交易信息建立自己的信心函数,结合自身的成本和预期收益,在最大化自己收益的前提下提出当前报价。仿真结果表明,采用该方法,可以保证电视广播台和认知用户之间的高效频谱分配,在供需平衡时,频谱分配效率接近100%。

The spectrum allocation for TV broadcasters in WRAN and cognitive users is modeled as a continuous double auction,in which the broadcaster can sell the idle spectrum to the cognitive users,with cognitive base station as a spectrum broker.During the allocation procedure,the TV broadcaster（primary user）and the cognitive users construct their own belief functions based on the trade information before,taking their cost and expected profit into consideration,and propose the current price to maximize their profits.Simulation results show that,this method can provide an efficient spectrum allocation solution.The allocation efficiency approaches 100%when supply is equal to demand.