基于非合作博弈论的多小区OFDMA系统动态资源分配算法研究

Dynamic Resource Allocation Algorithm for Multi-cell OFDMA Systems Based on Noncooperative Game Theory

该文采用非合作博弈论的方法研究了多小区OFDMA系统中的动态资源分配问题,首先将各基站的发射功率平均分配给各子载波,然后由所有小区在每个子载波上独立地进行资源分配博弈,给出了用户调度与功率分配联合博弈框架。为了进一步简化,将用户调度和资源分配分开完成,通过将信道增益引入到定价函数中,提出了一种新的定价机制,建立了用户确定时的非合作功率分配博弈模型,分析了其纳什均衡的存在性和唯一性,并设计了具体的博弈算法。仿真结果表明,所提算法在保证吞吐量性能的同时,进一步提升了系统的公平性。

Dynamic resource allocation algorithms are investigated for multi-cell Orthogonal Frequency Division Multiple Access （OFDMA） systems based on noncooperative game theory where the maximal power of each Base Station （BS） is assigned equally to all subcarriers and all BSs operate noncooperative user scheduling and resource allocation game at each subcarrier independently. Firstly, a joint noncooperative game framework is proposed for user scheduling and power allocation. Secondly, to simplify further, the whole procedure is divided into two steps where a noncooperative power allocation game model is formulated by introducing channel gain of each scheduled user into its pricing function. Thirdly, the existence and uniqueness of Nash equilibrium of the proposed game model are analyzed. Finally, a specific algorithm is developed accordingly. Simulation results demonstrate that the proposed algorithm improves system level fairness with good performance in terms of system throughput.