A time slot sharing cooperation strategy based on game theory in D2D networks

Abstract

In order to promote the devices belonging to different users to participate in cooperative communication in D2D networks, a time slot sharing cooperation strategy based on game theory is proposed. At first, the cooperative communication between devices which help each other to relay data is established based on sharing time slots. Secondly, the time slot sharing problem is analyzed by using Nash bargaining method of game theory. Meanwhile, the length of time slot which is used to relay the other devices is obtained by adopting Lagrange multiplier method. Thus, the problem that the devices how to cooperate is solved. Finally, the cut-off conditions of devices cooperation is derived, and the problem that devices when to cooperate is solved. Simulation results show that，compared with the direct transmission mode, the proposed strategy can improve energy efficiency of the devices effectively.

Keywords

• D2D networks
• time slot sharing
• game theory
• Nash bargaining