Research On Game-theory-based Interference Management In CoMP Systems

The heterogeneous network architecture based on co-frequency deployment is the trend of future mobile communication. But this will let the inter-cell interference become more and more serious, especially for the edge users.CoMP is an effective interference management method to improve cell edge users' spectral efficiency while it has no contribution to the whole system's performance. Non-cooperated power allocation game is an distributed power allocation method which considers the whole system's performance while sacrifices the edge users' spectral efficiency. This thesis combined CoMP and non-cooperated power allocation game together under the co-frequency deployed heterogeneous network. Due to the random deployment of HBSs, we chose the user-centric CoMP and we gave the algorithm of dynamic clustering. Then we analyzed the utility function of non-cooperated power allocation game under user-centric CoMP, proved the unique existence of Nash Equilibrium, and gave an iterative algorithm to search the Nash Equilibrium.This thesis analyzed the combined scheme's performance for different kinds of users from the aspects of both spectral efficiency and energy efficiency. Under the given system model and parameters, for edge users, HBS users and MBS users, the simulation results showed the combined method can improve their spectral efficiency and energy efficiency 26% and 89%, 12% and 51%, 10% and 19% respectively.