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

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.