OFDMA感知无线电网络中一种基于拍卖博弈的频谱共享新算法

在基于OFDMA的感知无线电网络中,为了最大化从网络的吞吐量,考虑了空间频率复用,通过干扰判据和邻接矩阵描述感知链路在子载波上的冲突,将最大化从网络和速率的问题建模为基于VCG机制的多个赢家的子载波拍卖博弈。通过逐一求解单个子载波上的二进制整数规划问题获得最优解。仿真结果表明,所提出的子载波拍卖算法有效地提高了感知无线电网络中资源的利用效率。

Novel Auction-Based Spectrum Sharing Algorithm for OFDMA-Based Cognitive Radio Networks

In order to improve the utilization efficiency of the radio resources, the spatial frequency multiplexing is considered in an OFDMA-based cognitive radio system. The conflict between the cognitive radio links over sub-carriers is described by interference criteria and adjacency matrix, thus the optimization problem to maximize the sum-rate of secondary networks is modeled as a multi-winner sub-carrier auction game which is based on VCG (Vickrey-Clarke-Groves) mechanism, the optimal solution can be obtained by solving a binary integer programming for each of the sub-carriers. Numerical results show that the proposed sub-carrier auction game can effectively improve the utilization efficiency of the resources for cognitive radio networks.