Electronics and Telecommunications Research Institute

Jong Choul Yim

Sun Me Kim

Hyun Joo Bae

Ki Sook Chung

Sun Hwan Lim

Chang Sup Keum

Hyun Kyung Yoo

Disclosed is a blockchain system. A blockchain system according to an embodiment of the present disclosure includes: at least one confirmation node; at least one management node configuring a confirmation group by including the at least one confirmation node, and configuring a confirmation block by combining transactions generated in the confirmation group; and an operator node controlling the at least one management node, wherein the at least one management node configures blockchain by combining respective confirmation blocks, wherein the management node configures the blockchain by resetting a parent block on the basis of an generation order of the confirmation blocks and distributes the blockchain.

Blockchain system and operation method thereof

Provided is an apparatus for managing zone presence, which manages presence information of a zone including a plurality of wireless access points, including: a presence managing unit receiving a subscription request from an application server and determining whether user terminal access information received from at least any one among the plurality of wireless access points corresponds to the subscription request; and an API processing unit providing the presence information to the application server when the user terminal access information corresponds to the subscription request.

Apparatus and method for managing zone presence

An IP multimedia subsystem (IMS)-based service sharing system includes an IMS, a master IMS terminal registered in the IMS, and a slave IMS terminal not registered in the IMS, wherein the master IMS terminal transmits IMS registration information to the slave IMS terminal by using near field communication (NFC), and the slave IMS terminal is registered in the IMS on the basis of the transmitted IMS registration information.

Master IMS terminal for sharing IMS-based service, slave IMS terminal for sharing IMS-based service, system for sharing IMS-based service, and sharing method

Growing community of inventors

Daejeon, South Korea

Jong Choul Yim