Relay Selection and Power Allocation Strategy for Decode-and-Forward (DF) Cooperative Relay Network Based on Buyer/Seller Game
Ke Feng① Feng Sui-li① Hu Jie①② Zhuang Hong-cheng③
①(School of Electronic and Information Engineering, South China University of Technology, Guangzhou 510640, China) ②(Engineering College, South China Agriculture University, Guangzhou 510642, China) ③(Pre-research Dept. Huawei Technologies CO. Ltd, Shenzhen 518100, China)
Abstract：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.
2010, Vol. 32 
