A5101695410- Indoor and Outdoor Localization Technologies
- Energy Efficient Wireless Sensor Networks
- Smart Grid Energy Management
- Wireless Communication Networks Research
- Underwater Vehicles and Communication Systems
- Microgrid Control and Optimization
- Green IT and Sustainability
- Robotics and Sensor-Based Localization
- Advanced MIMO Systems Optimization
- Trace Elements in Health
- Thin-Film Transistor Technologies
- Gas Dynamics and Kinetic Theory
- Cooperative Communication and Network Coding
- Advanced Wireless Communication Techniques
- Energy Harvesting in Wireless Networks
- Full-Duplex Wireless Communications
- Advanced Wireless Network Optimization
- Advanced Wireless Communication Technologies
- IoT and Edge/Fog Computing
- Folate and B Vitamins Research
- Software-Defined Networks and 5G
- Plasma and Flow Control in Aerodynamics
- Silicon and Solar Cell Technologies
- Laser Material Processing Techniques
- Astronomical Observations and Instrumentation
Gwangju Institute of Science and Technology
2015-2020
Sungkyunkwan University
2012-2015
Kangbuk Samsung Hospital
2015
Konkuk University Medical Center
2009
Stanford University
2002
A smart grid facilitates more effective energy management of an electrical system. Because both consumption and associated building operation costs are increasing rapidly around the world, need for flexible cost-effective used by buildings in a environment is increasing. In this paper, we consider system connected to external (utility) as well distributed resources including renewable source, storage system, vehicle-to-grid station. First, modeled using Markov decision process that...
Network slicing to create multiple virtual networks, called network slice, is a promising technology enable networking resource sharing among tenants for the 5th generation (5G) networks. By offering slice tenants, supports parallel services meet service level agreement (SLA). In legacy every tenant pays fixed and roughly estimated monthly or annual fee shared resources according contract signed with provider. However, such allocation mechanism may result in low utilization violation of user...
Demand response (DR) aims at improving the reliability and efficiency of power grids by shaping demand over time. Given that building energy consumption constitutes a significant portion overall grid load, management is critical component for DR portfolio. In this study, control policies lighting air-conditioner systems individual spaces in buildings are proposed. The designed to achieve reduction amount specified request while minimizing user discomfort. A challenge cope with uncertainty...
In wireless sensor networks powered by battery-limited energy harvesting, nodes that have relatively more can help other reduce their consumption compressing the sensing data packets in order to consequently extend network lifetime. this article, we consider a compression technique shorten packet itself energies consumed for transmission and reception eventually increase entire First, present an model, which at each node is derived. We then propose algorithm determines level decrease total...
Mobile communication technology in the field of ubiquitous computing is one important technologies. The development GPS mobile communications and PDA, vast majority devices such as smart phones also being equipped with functionality. This user where they are located based on number through services were able to receive information. In this paper, mounted a device user`s location using capabilities track migration routes accumulated determine migratory path system used recommend proposed...
In wireless sensor networks, the accurate estimation of distances between nodes is essential. addition to distance information available for immediate neighbors within a sensing range, two-hop can be exploited in various network applications such as localization, robust data transfer against hidden terminals, and geographic greedy routing. this article, we propose method, which first obtains region neighbor possibly exist then takes average points that region. The improvement accuracy...
This paper proposes an energy storage system (ESS) management algorithm to reduce the peak electricity consumption for demand response (DR). In a building equipped with ESS and photovoltaic generator, amount of charged into can be used following day. The proposed calculates feasible reduction using information about net in ESS, provides charging discharging schedule that achieve maximum DR requests. To examine performance algorithm, case study was conducted real-life data measured within...
In this paper, we propose a single-drone-based localization for radio frequency (RF) sources in an outdoor environment. For fast and accurate localization, dynamic trajectory planning scheme, which guides the RF scanning drone toward direction minimizing geometric dilution of precision (GDOP) order to minimize uncertainty location estimation target sources.
The analytical derivation of the diversity-multiplexing tradeoff (DMT) for a half-duplex dynamic decode and forward (DDF) MIMO relay protocol has been regarded as an open problem. Recently, however, minimization problem setting found, solution which corresponds to DMT function DDF protocol. In this paper, functions three special protocols using two antennas at nodes, source, relay, destination single antenna other node are derived first. Then, every is derived. These compared with one...
The downlink beamforming weights which can suppress interfering signals toward out-of-cell mobile stations for a TDD-based OFDMA system are introduced. First, the optimally designed based on iteration. Then, in sub-optimal way. It is shown that sub-optimally have same structure as of uplink derived MMSE. performance these schemes compared average receive SINR. heuristic scheme exploits also investigated.
When GPS signals are not available, a relative localization can be alternatively used to represent the topological relationship between mobile nodes. A location map of network constructed by using distance information all pairs nodes in network. If is large, number small local maps individually and merged obtain whole map. However, this approach may result high computation communication overhead. In paper, we propose reference-node selection scheme for construction, which chooses subset as...