基于博弈论的D2D通信功率控制算法

Device-to-Device communication power control algorithm based on game theory

针对多D2D通信用户共享蜂窝网络频谱资源中的干扰进行研究,为了减少D2D用户间干扰带来的影响,提出了一种改进的基于博弈论的D2D通信功率控制算法。算法中的博弈者是复用相同频谱资源的多D2D通信用户。建立了博弈模型,并在代价函数中引入代价因子,确定了效用函数,得到参与博弈的D2D用户的最优响应函数。文中对博弈均衡特性进行分析,证明了模型中的策略能够达到稳定状态。通过仿真实验验证了算法的有效性,并且与其他算法对比,证明使用此改进算法的D2D用户吞吐量更大,公平性更高。

The introduction of D2 D communication technology in cellular networks has become a research hotspot. In order to maximize its advantages, the interference of D2 D users in the system needs to be managed. This paper mainly studies the scenario where cellular user spectrum resources in a cell are multiplexed by multiple D2 D communication users. Aiming at the interference problem of D2 D communication users, an improved algorithm based on game theory is proposed to control the power of D2 D communication users. The game players in the algorithm are the multi-D2 D communication users that multiplexes the same spectrum resources. The game model is established, and the cost factor is introduced into the cost function, the utility function is determined, and the optimal response function of the D2 D user participating in the game is obtained. The paper analyzes the equilibrium characteristics of the game and proves that the strategy in the model can reach a steady state. Simulation results show the effectiveness of the proposed algorithm. Comparing with other algorithms, it is proved that D2 D users using this improved algorithm have higher throughput and higher fairness.