Yuseong gu, South Korea
Yuseong gu, South Korea

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Jeong J.-D.,Energy IT Research Section | Han J.,Energy IT Research Section | Choi C.-S.,Energy IT Research Section | Park W.-K.,Energy IT Research Section | And 2 more authors.
2016 International Conference on Information and Communication Technology Convergence, ICTC 2016 | Year: 2016

Energy usage optimization in homes is an important issue because over 30% of the energy consumption of the world occurs in the residential sector. One of key points for home energy management is energy monitoring and control through low-power and low-cost wireless communication. The block-coded group PPM (BC-GPPM) is a scheme with low complexity typically proportional to power and cost because the BC-GPPM can support coding gain through modulation. This paper proposes a design method of BC-GPPM modem. From implementation results, the BC-GPPM achieves the improved complexity by about 6 times and the enhanced power efficiency by about 17 times. © 2016 IEEE.


Lee H.,Energy IT Research Section | Choi M.,Energy IT Research Section | Park W.-K.,Energy IT Research Section | Lee I.,Energy IT Research Section | Lee S.H.,Chungbuk National University
International Conference on ICT Convergence | Year: 2014

This paper describes energy application services for energy management technology. To save energy, walking commute and using stairs are considered. Various sensors are used to measure the distance of walking and the saved energy is calculated using the measured data. Using the proposed mechanism, users can easily recognize the saved energy by energy saving action, and result in energy cost saving. © 2014 IEEE.


Lee H.,Energy IT Research Section | Park W.-K.,Energy IT Research Section | Huh J.,Energy IT Research Section | Lee I.,Chungbuk National University | Lee S.H.,Chungbuk National University
International Journal of Applied Engineering Research | Year: 2014

This paper proposes a device adaptive content streaming mechanism for multiple consumer devices in a smart home to provide bandwidth-efficient content distribution. For the purpose of enhancing the CPU performance of the transformation server, a converted content-sharing method is also suggested for devices with same capabilities. First, the proposed mechanism requires three profiles, one for devices, one for display programs, and one for services. They are used by a content transformation server to determine adequate sizes, bit rates, and frame rates of the original content so that it may be transmitted efficiently to devices according to their capabilities. Second, the content-conversion mechanism is improved through content sharing among devices with the same characteristics, which reduces the processing time required for redundant content transformation. As a result, the proposed mechanism provides more efficient conversions and transmissions of content, in that CPU utilization for content transformation and bandwidth usage for streaming are approximately 50% more efficient due to the elimination of redundant receptions and conversions of content for the same types of devices. This method can be adapted for use with real-time streaming services such as broadcasting and surveillance cameras and optimized for various types of consumer devices. © Research India Publications.


Lee H.,Energy IT Research Section | Park W.-K.,Energy IT Research Section | Lee I.-W.,Energy IT Research Section | Lee S.H.,Chungbuk National University
International Journal of Applied Engineering Research | Year: 2014

This paper describes energy saving and management mechanism based on profiles and rules. Monitoring of energy consumption is the basis to save and manage energy. Smart plugs are used to collect energy usage data for devices, and the devices are controlled by users or automatically based on the predefined rules through the energy management server. First, users define the profiles and rules for energy saving in the energy management server (EMS). And the smart plugs are installed for devices in the smart buildings, collect the data of energy consumption, and send them to the EMS. And, the EMS analyzes energy consumption data, finds the energy saving context, turns off the devices according to the predefined rules, and reports the results to the users. Also, the mobile devices provide the graphic user interface (GUI) to users for monitoring and controlling devices. Using the proposed scheme, devices can be efficiently controlled and managed to avoid energy leakage. © Research India Publications.

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