A relay station relays communication between a base station and a wireless terminal, and the relay station includes: a first wireless unit, a second wireless unit and a third wireless unit, each of which communicates with at least one of the base station and the wireless terminal, wherein when the first wireless unit is connected to the wireless terminal and the second wireless unit is connected to the base station and when there is a trigger of handover, the third wireless unit is used to execute at least one of handover to another base station and handover to switch a control channel with the wireless terminal.