Patent ID: 8358627
Filing Date: 2013-01-22
Classification: H04W

Abstract:
1. A radio communication system comprising a first radio communication system, a second radio communication system and a mobile station connectable to the first radio communication system and the second radio communication system separately, the mobile station configured to perform a handover from the first radio communication system to the second radio communication system, wherein the mobile station transmits mobile station capability information to the first radio communication system via a first radio connection set between the mobile station and the first radio communication system, before a disconnection of the first radio connection, the mobile station capability information indicating the capability of the mobile station in the second radio communication system, the first radio communication system transmits the mobile station capability information to the second radio communication system, before the disconnection of the first radio connection, the second radio communication system transmits a parameter to the first radio communication system, before the disconnection of the first radio connection, the parameter being used in a second radio connection to be set between the mobile station and the second radio communication system, the first radio communication system transmits the parameter to the mobile station via the first radio connection, before the disconnection of the first radio connection, the second radio communication system includes a circuit switching domain and a packet switching domain, the handover is a handover from the first radio communication system to the packet switching domain, and upon receipt of data via the packet switching domain, and the mobile station starts the handover from the packet switching domain to the circuit switching domain.