Coalition Formation Game for Green Resource Management in D2D Communications

Device-to-device (D2D) communication in cellular networks, providing a way of utilizing the proximity of communicating devices, may save the users´ battery power and achieve high energy efficiency. However, it also induces some pending problems such as the complex interference environment due to bandwidth reusing. To fully achieve the advantages of D2D communication, proper resource management becomes crucial. In order to improve the energy efficiency of wireless users, we model the joint mode selection and spectrum sharing as a coalition formation game and propose a coalition formation algorithm to jointly solve the mode selection and spectrum sharing in a D2D system. The algorithm is proven to be of convergence and stability. Numerical results demonstrate that the energy efficiency of all the wireless users can be dramatically improved.