Integrated Game Theoretic-Grey Relational Analysis Handover Method for Heterogeneous Networks

In this paper, an integrated game theoretic and grey relational analysis handover method for dense small cell-heterogeneous networks is proposed. The game theory is deployed to optimize the transmission power of the base stations before applying the grey relational analysis technique. The payoff function of the game contains utility and cost functions. The game is solved by reaching the Nash equilibrium where we mathematically proved the existing of it. The grey relational analysis is then used to rank the small cells prior to handover. Results show that the proposed method outperformed the conventional method in terms of unnecessary handover, handover failure, average small cell throughput and average small cell load.