Wireless communication system, wireless communication method, wireless base station, and wireless communication terminal

A wireless base station comprising:

• a target cell extracting unit that extracts a handover destination cell of a wireless communication terminal;
• a target cell notifying unit that notifies first HO preparation information, which is information for handover of the wireless communication terminal including information about the handover destination cell, to another wireless base station accommodating the handover destination cell;
• and
• a subsequent candidate cell notifying unit that receives, from the another wireless base station, information about a subsequent candidate cell which is a candidate of handover destination other than the handover destination cell, and notifies second HO preparation information including the information about the subsequent candidate cell to a wireless base station accommodating the subsequent candidate cell.

A wireless communication method for controlling a plurality of wireless base stations, the wireless communication method comprising:

• causing a first wireless base station connected to a wireless communication terminal to extract a handover destination cell of the wireless communication terminal;
• causing the first wireless base station to notify first HO preparation information, which is information for handover of the wireless communication terminal including information about the handover destination cell, to a second wireless base station accommodating the handover destination cell;
• causing a second wireless base station to obtain the information about the handover destination cell from the first HO preparation information, and extract the subsequent candidate cell based on a state between the handover destination cell and another cell in wireless communication;
• causing the second wireless base station to extract the subsequent candidate cell, which is a candidate of handover destination other than the handover destination cell, based on a state between the handover destination cell and another cell in wireless communication;
• causing the first wireless base station to receive information about the subsequent candidate cell transmitted from the second wireless base station;
• and
• causing the first wireless base station to notify second HO preparation information including the information about the subsequent candidate cell to a wireless base station accommodating the subsequent candidate cell.