Dong-Seong Kim received the Ph.D. degree in electrical and computer engineering from the Seoul National University, Seoul, South Korea, in 2003, where he was a fulltime Researcher with ERC-ACI, from 1994 to 2003. From 2003 to 2005, he was a Postdoctoral Researcher with the Wireless Network Laboratory, School of Electrical and Computer Engineering, Cornell University, NY, USA. From 2007 to 2009, he was a Visiting Professor with the Department of Computer Science, University of California at Davis, Davis, CA, USA. He is currently the Director of the KIT Convergence Research Institute and the ICT Convergence Research Center, Kumoh National Institute of Technology (ITRC and NRF Advanced Research Center Program supported by the Korean Government). His current main research interests include the real-time IoT and smart platform, industrial wireless control networks, networked embedded systems, and intelligent transportation systems. He is a Senior Member of IEEE/ACM and the Executive Manager of the Korean Institute of Communications and Information Sciences.
Industrial and Military Networks, Real-time Embedded System and IoT
Ph.D, School of ECE - Seoul National University, Korea
Senior Member of the IEEE and ACM,
Life Member of the KICS(Executive Director), AFCEA, IEEK and KSII)
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CONTROL ENGINEERING PRACTICE 11, 1301-1313
This paper proposes a new method to obtain a maximum allowable delay bound for a scheduling of networked control systems. The proposed method is formulated in terms of linear matrix inequalities and can give a much less conservative delay bound than the existing methods. A network scheduling method is presented based on the delay obtained through the proposed method, the bandwidth of a network is allocated to each node and the sampling period of each sensor and controller is determined. The presented method can handle three types of data (periodic data, sporadic data, and message) and guarantees real-time transmission of periodic and sporadic data, and minimum network utilization for non-real time message.
INDUSTRIAL INFORMATICS, IEEE TRANSACTIONS ON 8 (1), 61-68
This paper proposes gradient routing with two-hop information for industrial wireless sensor networks to enhance real-time performance with energy efficiency. Two-hop information routing is adopted from the two-hop velocity-based routing, and the proposed routing algorithm is based on the number of hops to the sink instead of distance. Additionally, an acknowledgment control scheme reduces energy consumption and computational complexity. The simulation results show a reduction in end-to-end delay and enhanced energy efficiency.
CONTROL SYSTEMS TECHNOLOGY, IEEE TRANSACTIONS ON 10 (3), 318-330
This paper presents a scheduling method for network-based control systems with three types of data (periodic data, sporadic data, and messages). As a basic parameter for the scheduling method for network-based control systems, a maximum allowable delay bound is used,which guarantees stability of network-based control systems and is derived from characteristics of the given plant using the presented theorems. The presented scheduling method for network-based control systems can adjust the sampling period as small as possible, allocate the bandwidth of the network for three types of data, and exchange the transmission orders of data for sensors and actuators.