The invention provides a method for assisting communication between a target base station and user equipment in a source base station. The method includes the following steps: a, as for the user equipment needing to be switched from the source base station to the target base station, the DOA between the user equipment and the target base station is determined in cooperation with the position information of the target base station according to the position information, reported by the user equipment, of the user equipment; b, the DOA between the user equipment and the target base station is provided for the target base station. According to the method, before the user equipment switched to the target base station reports the position information of the user equipment, the DOA between the user equipment and the target base station is determined, and therefore the communication waiting time after the user equipment is switched to the target base station is shortened.