Patent ID: 8229418

Claim:
A wireless control apparatus of a wireless communication system including a base station and a mobile station, the mobile station configured to perform handover for changing the base station for communication in response to the mobile station moving from one cell to another cell, the wireless control apparatus forming and controlling an area of the base station according to an antenna pattern, the apparatus comprising: a receiving unit that receives information from the mobile station, the information relating to a neighboring base station corresponding to a handover destination candidate; an adjacency calculating part that calculates adjacency between a current cell and a neighboring cell by accumulating the information of the neighboring base station corresponding to the handover destination candidate, the information being received by the receiving unit; and an antenna pattern control part that controls and directs at least one of a main lobe, a side lobe, and a null point between the main lobe and the side lobe of the antenna pattern based on the adjacency to reduce frequency interference between a current cell formed by a current base station and a neighboring cell formed by the neighboring base station, wherein the adjacency calculating part increases an adjacency counter value by a predetermined value in response to an active set including a cell of the base station as a main branch being changed, the adjacency counter value indicating the adjacency between the cell of the base station and the cell of the corresponding neighboring base station, the base station being included in the information that is received by the receiving unit and that relates to the neighboring base station corresponding to a handover destination candidate, the main branch being the base station transmitting a common pilot channel or a common control channel with the highest reception level, the active set referring to a combination of the main branch and a certain number of major branches having small differences from the highest reception level, and wherein the antenna pattern control part controls at least one of an antenna pattern tilt angle and an antenna pattern azimuth of at least one of the current base station and the neighboring base stations based on a comparison of the adjacency counter values.