COMMUNICATION METHOD FOR OPTIMIZIING BEAM WIDTH AND SELECTING A TARGET BASE STATION AND TERMINAL AND BASE STATION PERFORMING THE COMMUNICATION MEHTOD THEREOF

摘要

The terminal may select any one of the plurality of neighbor base stations as the target base station to transmit the uplink signal. When the terminal transmits reference signals to a plurality of neighbor base stations in order to select a target base station, the plurality of neighbor base stations may estimate the position and distance of the terminal based on the received reference signals. Each of the plurality of neighbor base stations may determine a signal quality when communicating with the terminal based on the estimated position and distance of the terminal. Each of the plurality of neighbor base stations may determine whether to respond to the reference signal based on the determined signal quality. The terminal may select a target base station from neighbor base stations, that is, candidate base stations, responding to the reference signal. More specifically, the terminal may determine the signal quality when communicating with the candidate base station based on the number of antennas and the signal incident angle of the candidate base station. The terminal may select the target base station from among the plurality of candidate base stations based on the determined signal quality. Furthermore, the target base station or the terminal may optimize the beam width in consideration of the angle formed by the target base station and the terminal and the connection probability.