Samsung Electronics Co., Ltd.

Ajou University Industry-Academic Cooperation Foundation

Hyun-Jin Lee

Jae-Hyun Kim

Jong-Hyung Kwun

Young-Hyun Jeon

Ok-Seon Lee

Ji-Soo Kim

Chan-Ho Min

Sin-Hun Kang

The present invention relates to a method and a device for controlling the hand-over message transmission power of a mobile station in a mobile communication system. The present invention comprises the processes of: acquiring uplink data relating to a hand-over target base station; using the uplink data to determine the maximum transmission power of a hand-over ranging message; and transmitting a hand-over ranging message having a power level below the determined maximum transmission power to the hand-over target base station.

Method and device for controlling hand-over message transmission power in a mobile communications system

Group handover method and apparatus in a broadband wireless communication system which supports a mobile relay station are provided. A method of a serving base station for group handover of the mobile relay station includes when receiving a measurement report message from a relay station, determining whether the relay station is a mobile relay station of a simple type which forwards a signal; collecting handover related information of the mobile relay station and mobile terminals belonging to the mobile relay station, from pre-stored information; requesting handover of the mobile relay station and the mobile terminals by transmitting the collected handover related information to a target base station; and receiving a message indicating whether the handover of the mobile relay station and the mobile terminals is approved, from the target base station.

Group handover method and apparatus in broadband wireless communication system that supports mobile relay station

An apparatus and method for reduction of a handover interruption time using an estimated handover time negotiation in a broadband wireless communication system are provided. A method for supporting a handover of a mobile station in a serving base station includes receiving a handover pre-notification response message including a residual estimated handover time from a target base station, determining a current residual estimated handover time using the residual estimated handover time, and exchanging the determined residual estimated handover time with the target base station.

Apparatus and method for reduction of handover interruption time using estimated handover time negotiation in a broadband wireless communication system

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Pohang-si, South Korea

Hyun-Jin Lee