DF协作中继网络基于买者/卖者博弈的中继选择和功率分配策略

该文针对采用解码-转发(DF)协议的协作中继网络,提出了一种基于买者-卖者博弈的中继选择和功率分配策略,通过将用户建模为买者,可以以最大效用为标准选择最优中继和确定最佳的购买功率;将中继建模为卖者,可通过先市场后利润的功率价格调整策略获得最大的利润.分析了两者博弈达到平衡的条件并进行了仿真,结果验证了纳什均衡点的存在并表明,该策略计算量少,收敛速度快,实用性强,在兼顾用户和中继节点的利益的同时可以有效提高用户的传输速率,扩大基站的覆盖范围,提高功率利用效率.

Relay Selection and Power Allocation Strategy for Decode-and-Forward (DF) Cooperative Relay Network Based on Buyer/Seller Game

In this article, a relay selection and power allocation strategy based on buyer-seller game is proposed for Decode-and-Forward (DF) cooperative relay network. The user is modeled as a buyer which selects the optimal relay and determines the optimal amount of power bought from the relay based on the maximum utility criterion. The relay is modeled as a seller which determines the price of the power using market-first-profit-second strategy to achieve the maximum profit. The equilibrium conditions of the game between the two sides are analyzed. The simulation results verify the existence of the Nash equilibrium point and illustrate the small amount of calculation, the fast convergence and the practicability of the strategy. The results also illustrate that using the strategy may increase the transmission rate of the user, the coverage of the base station and improve the power efficiency taking into account the interests of the user and the relay nodes.