User-centeric semi-dynamic clustering method for JT-CoMP scenarios

In order to decrease the interference between small cells in Ultra Dense Network(UDN),this paper a propose an user-centric semi-dynamic clustering method for Coordinated Multiple Point(CoMP) Joint Transmission(JT) scenarios.It divides small stations into non-overlapping clusters,and takes the small stations in the cluster and the small stations located outside the cluster but having large interference with the cluster as the optional service stations of the user.Zero-forcing precoding is used to eliminate interference to users from non-serving base stations in the optional service stations.Users select a number of candidate service stations from the optional service stations service and selected the cluster heads,with the goal of maximizing the sum of throughput of each user select the station clusters for users from the optional service stations.At the meanwhile a suboptimal method for selecting service station clusters for users is given to reduce the complexity.Simulation results show that compared with the existing scheme in the same scenario the proposed scheme improves the system throughput.