MOBILE COMMUNICATION SYSTEM UTILIZING DISTRIBUTED SMALL BASE STATION AND METHOD THEREOF

摘要

The present invention relates to a mobile communication system including a distributed small base station (DBS) and a beam forming method. The method includes: a step in which a DBS transmits an initializing signal of a first frequency to a macro base station (MBS), and the MBS compares the transmission power and reception power of the initializing signal and estimates the distance to the DBS; a step of comparing the estimated distance and a direct route distance between the MBS and DBS to determine whether a direct route between the MBS and DBS exists; a step in which the MBS gradually manages at least one of the frequency or beam width and transmits a pilot signal repeatedly when the direct route is determined to exist, and the DBS transmits a reception confirmation signal to the MBS only when the pilot signal is normal received; and a step of ending the step of repeatedly transmitting when the MBS does not receive a reception confirmation signal and determining the beam characteristics based on the frequency and the beam width when a reception confirmation signal is received lastly. [Reference numerals] (AA) Start; (BB) End; (S100) Determine the presence of a direct route between an MBS and a DBS within a cellular band; (S200) Determine optimal BDMA beam characteristics by controlling frequency and the width of a beam