Samsung Electronics Co., Ltd.

Korea Advanced Institute of Science and Technology

Hyun-Soo Yoon

Jong-Hyung Kwun

Dong-wook Kim

Young-Hyun Jeon

Han-Jin Lee

Jae-Won Lee

Chan-Ho Min

Youn-Ho Lee

Seung-Woo Jeon

Sawhney Mrinalini

Hee-Youl Kim

Byung-Chun Chung

A method for forming a moving network group by a mobile relay station (MRS) in a mobile multi-hop relay (MMR) system is provided. The MRS determines whether a transportation means mounted with the mobile relay station is at a predetermined location derived from travel information. When a velocity information of the transportation means at the predetermined location is zero (0), the MRS determines whether to include a mobile station (MS) to the moving network group based at least partly upon a signal that the mobile station receives from the mobile relay station.

Method for forming a moving network group in a mobile relay station and mobile multi-hop relay system supporting the same

An apparatus and method for performing a handover in a broadband wireless communication system is provided. In the broadband wireless communication system, a base station includes: a grouping unit for grouping mobile stations by using information on a movement path of each mobile station and information on a received signal strength of a neighboring base station, thereby constituting at least one group; a controller for modifying hystereses of remaining mobile stations among the mobile stations belonging to the same group, if a predetermined number of mobile stations perform handovers; and a transmitter for transmitting a message including modified hysteresis information to the remaining mobile stations belonging to the group.

Apparatus and method for performing handover in broadband wireless communication system

A license-management system and method is provided. A method of issuing a proxy certificate includes transmitting a proxy-certificate-issuance-request message to a license server in order for the local license manager to acquire an authority to issue a license by a local license manager; enabling the license server to verify the proxy-certificate-issuance-request message; if the proxy-certificate-issuance-request message is valid, transmitting a proxy certificate to the local license manager by the license server, the proxy certificate including information regarding the authority to issue a license; and verifying the proxy certificate by the local license manager.

License management system and method

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Daejeon, South Korea

Hyun-Soo Yoon