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Naju, South Korea

Bayarmagnai E.,i2max | Lee S.-H.,Korea Communications Agency | Kim D.-H.,Jeju National University
Lecture Notes in Electrical Engineering | Year: 2012

Electric vehicles are fueled by a battery charger that transfers electricity provided by electric utilities into the vehicle battery to recharge it. This paper proposes architecture for remote monitoring of electric vehicle based on M2M(Machine to Machine) in mobile platform. This architecture is composed of mobile terminal and electric vehicles. Mobile terminal includes monitoring module, buffer, communication module, etc. And electric vehicle includes monitoring agent, logical object, memory, etc. This architecture provides a variety of the real-time sensing data such as velocity, acceleration, temperature and energy in vehicles. We design the remote monitoring system in mobile platform and electric vehicles. © 2012 Springer Science+Business Media.

Youn M.,Yonsei University | Kim S.G.,Korea University | Jeon H.E.,Korea Communications Agency | Lee J.,Yonsei University
IEICE Transactions on Communications | Year: 2012

Topology control is one of the key issues in wireless networks. In this letter, we propose a simple topology control algorithm based on Connected Dominant Set (CDS) theory. The proposed algorithm uses less memory and less overhead cost than other existing schemes, and is therefore appropriate for implementation in wireless sensor networks. We will prove that the algorithm can form a CDS and guarantee network connectivity. The performance of our algorithm is demonstrated by simulation results. Copyright © 2012 The Institute of Electronics, Information and Communication Engineers.

Yoon H.,Korea Communications Agency | Hwang J.,University of Management and Economics | Weiss M.B.H.,University of Pittsburgh
Computer Networks | Year: 2012

Because of increasing spectrum demand, the value of the spectrum resource has been increasing, and efficiency of spectrum usage has been an important issue in the wireless industry. Therefore, there have recently been many studies of changing the spectrum management framework based on market mechanisms. This research analyses three different mechanisms as alternative secondary trading frameworks: a brokerage mechanism, auction and direct trading, and suggests an optimal framework for secondary-use trading based on in-depth simulations that consider different attributes according to their technical characteristics and market changes. Based on the analysis, this study investigates economic values and competition environments of each alternative for secondary trading mechanisms. © 2011 Elsevier B.V. All rights reserved.

Lee S.,Korea Communications Agency | Kim K.,Korea Communications Agency | Jang W.,Korea Communications Agency | Le A.N.,Hanoi University
International Conference on Ubiquitous and Future Networks, ICUFN | Year: 2013

Recently, M2M (Machine-to-Machine) is a emerging technology to enhance the telecommunication market for the future. So, many global Standardization bodies (including ITU-T, ETSI, oneM2M) are actively promoting to work for making the global standards. And some of them have been worked architecture, use case and requirements for M2M service from a few years ago. However, they have some obstacles since M 2M h as a l ot o f stakeholders and is relate to a variety of industry fields such as smart home, telematics, healthcare, smart grid etc. Hence, starting to 2013, oneM2M begins in earnest to work for fundamental technical specification and ToR (Terms of Reference). Therefore, this paper proposes a service-adaptive functional architecture for M2M service from a global standardization (oneM2M) perspective. A service-adaptive functional architecture is composed of device domain, network domain and service domain to easily provide the related standards. © 2013 IEEE.

Kim B.C.,ETRI | Kim W.-K.,Korea Communications Agency | Lee G.-T.,Korea Communications Agency | Choi H.-D.,ETRI | And 2 more authors.
Bioelectromagnetics | Year: 2014

This paper presents the results of measurements from simultaneous human exposure to various radiofrequency (RF) signals at densely populated areas. Measurements were performed at 1260 positions across Korea to determine exposure compliance to electromagnetic fields for the general public. The measured exposure levels were very low compared with the international exposure guidelines and Korean human protection notice. The highest total exposure ratio was 5.1×10-3 (approximately 7.1% of guideline limits). © 2014 Wiley Periodicals, Inc.

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