Cooperative Game Theoretic Approach for Distributed Resource Allocation in Heterogeneous Network

Small cells are low-powered cellular radio access nodes which make best use of available spectrum by reusing the same frequencies many times within a geographical area. However, the deployment of small cells (e.g., femtocells) may introduce extra interferences such as cross-tier(macrocellfemtocell) and co-tier (femtocell-femtocell) interferences. In this regard, an effective interference management mechanism is required for improving the performance of the network. In this study, a distributed resource allocation is introduced to deal with the interference problem in two-tier network. Specifically, we first apply FFR scheme to mitigate interference for crosstier problem. To reduce co-tier interference, a cooperative game model is proposed where each femtocells are regard as players of the game. Simulation results reveal that the proposed approach significantly improves capacity of the networks.