Patent ID: 8243684

Claim:
A radio communication apparatus executing a handover from a first radio communication network to a second radio communication network employing a radio communication scheme different from the first radio communication network, the apparatus comprising: a link controller configured to set a radio link for any one of the first radio communication network and the second radio communication network; a mobility manager configured to manage a mobility of the radio communication apparatus, the mobility from the first radio communication network to the second radio communication network; and a handover controller configured to control a handover from the first radio communication network to the second radio communication network, wherein the mobility manager notifies the handover controller of a service quality requirement value in a higher layer entity of the mobility manager, the handover controller sets a first communication quality threshold of the radio link to the link controller and a second communication quality threshold of the radio link to the link controller, the first communication quality threshold being associated with the service quality requirement value notified from the mobility manager, and the second communication quality threshold not being associated with the service quality requirement value notified from the mobility manager, the link controller notifies to the handover controller that a communication quality of the radio link reaches the first communication quality threshold or the second communication quality threshold, when the communication quality of the radio link reaches the first communication quality threshold or the second communication quality threshold, the handover controller notifies to the mobility manager that a condition for the handover from the first radio communication network to the second radio communication network is satisfied, when the handover controller is notified from the link controller that the communication quality of the radio link reaches the first communication quality threshold or the second communication quality threshold, the mobility manager notifies to the link controller via the handover controller an instruction related to the handover from the first radio communication network to the second radio communication network, when the mobility manager is notified from the handover controller that the handover is satisfied, and the first communication quality threshold and the second communication quality threshold are thresholds that relate to the handover from the first radio communication network to the second radio communication network.