Handover controller communication apparatus

A communication apparatus in a wireless communication system in which a plurality of cells with different bands are overlaid and which includes the communication apparatus and a user equipment, the communication apparatus comprising:

• an acquisition unit configured to acquire communication quality of the user equipment in a first cell in which the user equipment resides;
• a determination unit configured to determine whether to perform switching to a second cell overlaid with the first cell based on the communication quality of the user equipment;
• and
• an instruction unit configured to instruct the user equipment to perform the switching to the second cell when the switching to the second cell overlaid with the first cell is determined,
• wherein the communication quality of the user equipment is a throughput of the user equipment for a predetermined period,
• wherein the user equipment measures and reports downlink reception quality in the first cell to the communication apparatus, and
• wherein the determination unit estimates the throughput of the user equipment for the predetermined period based on the downlink reception quality in the first cell reported by the user equipment.