A graph-based dynamic coordinated clustering scheme for base station cooperation

In this paper, a graph-based dynamic coordinated clustering scheme is proposed for base station cooperation (BSC) wireless systems. An interference weighted graph is constructed to assist dynamic coordinated clustering for inter-cell interference mitigating and improving the cell-user performance. The assist graph is constructed with weighted interference value among users, considering the overhead exchange constraint, only 2 bits (1 bit for diversity set judgment, 1 bit for user status) signalling exchange between base stations are needed during the graph constructing. Based on the interference weighted graph, a modified Hungarian algorithm is used for the coordinated clustering. Simulation results show that the proposed scheme can improve the performance of cell-edge users.