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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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IEMEK Journal of Embedded Systems and Applications
Journal Basic Information
Journal DOI :
Institute of Embedded Engineering of Korea
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Volume & Issues
Volume 10, Issue 6 - Dec 2015
Volume 10, Issue 5 - Oct 2015
Volume 10, Issue 4 - Aug 2015
Volume 10, Issue 3 - Jun 2015
Volume 10, Issue 2 - Apr 2015
Volume 10, Issue 1 - Feb 2015
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Acoustic Event Detection and Matlab/Simulink Interoperation for Individualized Things-Human Interaction
Lee, Sanghyun ; Kim, Tag Gon ; Cho, Jeonghun ; Park, Daejin ;
IEMEK Journal of Embedded Systems and Applications, volume 10, issue 4, 2015, Pages 189~198
DOI : 10.14372/IEMEK.2015.10.4.189
Most IoT-related approaches have tried to establish the relation by connecting the network between things. The proposed research will present how the pervasive interaction of eco-system formed by touching the objects between humans and things can be recognized on purpose. By collecting and sharing the detected patterns among all kinds of things, we can construct the environment which enables individualized interactions of different objects. To perform the aforementioned, we are going to utilize technical procedures such as event-driven signal processing, pattern matching for signal recognition, and hardware in the loop simulation. We will also aim to implement the prototype of sensor processor based on Arduino MCU, which can be integrated with system using Arduino-Matlab/Simulink hybrid-interoperation environment. In the experiment, we use piezo transducer to detect the vibration or vibrates the surface using acoustic wave, which has specific frequency spectrum and individualized signal shape in terms of time axis. The signal distortion in time and frequency domain is recorded into memory tracer within sensor processor to extract the meaningful pattern by comparing the stored with lookup table(LUT). In this paper, we will contribute the initial prototypes for the acoustic touch processor by using off-the-shelf MCU and the integrated framework based on Matlab/Simulink model to provide the individualization of the touch-sensing for the user on purpose.
Implementation of a MTM-based secure OTP Generator for IoT Devices
Kim, Young-Sae ; Han, Jin-Hee ; Jeon, Yong-Sung ; Kim, Jung-Nyu ;
IEMEK Journal of Embedded Systems and Applications, volume 10, issue 4, 2015, Pages 199~206
DOI : 10.14372/IEMEK.2015.10.4.199
In this paper, we present the implementation of a secure OTP(One Time Password) generator for IoT(Internet of Things) devices. Basically, MTM(Mobile Trusted Module) is used and expanded considering secure IoT services. We combine the MTM architecture with a new hardware-based OTP generation engine. The new architecture is more secure, offering not only the security of devices but also that of the OTP service. We have implemented and verified the MTM-based OTP generator on a real mobile platform embedded with the MTM chip. The proposed method can be used as a solution for enhancing security of IoT devices and services.
Adaptive Power Saving Protocol Based on Traffic Estimation for Wi-Fi Direct Networks
Yoo, Hongseok ; Park, Yang-Woo ; Lee, Chae-Soo ; Yun, Tae-Jin ;
IEMEK Journal of Embedded Systems and Applications, volume 10, issue 4, 2015, Pages 207~212
DOI : 10.14372/IEMEK.2015.10.4.207
Wi-Fi Direct allows battery powered mobile devices to form a wireless ad hoc network. Since one member of the network called Group Owner (GO) takes the role of managing the network, the network lifetime is mainly affected by the energy efficiency of GO. Hence, Wi-Fi Direct defines power saving schemes that allow GO to save the energy by turning off its radio interface during the periods called absence periods. However, the Wi-Fi Direct specification does not specify how to set parameters (denoted by PS parameters) determining the schedule of the absence periods. In this paper, we therefore propose a novel traffic-aware power saving scheme for Wi-Fi Direct networks. In particular, the proposed scheme estimates the application-level traffic load and adaptively tunes the PS parameters according to the estimated value.
Appliance identification algorithm using multiple classifier system
Park, Yong-Soon ; Chung, Tae-Yun ; Park, Sung-Wook ;
IEMEK Journal of Embedded Systems and Applications, volume 10, issue 4, 2015, Pages 213~219
DOI : 10.14372/IEMEK.2015.10.4.213
Real-time energy monitoring systems is a demand-response system which is reported to be effective in saving energy up to 12%. Real-time energy monitoring system is commonly composed of smart-plugs which sense how much electrical power is consumed and IHD(In-Home Display device) which displays power consumption patterns. Even though the monitoring system is effective, users should themselves match which smart plus is connected to which appliance. In order to make the matching work to be automatic, the monitoring system need to have appliance identification algorithm, and some works have made under the name of NILM(Non-Intrusive Load Monitoring). This paper proposed an algorithm which utilizes multiple classifiers to improve accuracy of appliance identification. The algorithm proposes to understand each classifiers performance, that is, when a classifier make a result how much the result is reliable, and utilize it in choosing the final result among result candidates from many classifiers. By using the proposed algorithm this paper make 4.5% of improved accuracy with respect to using single best classifier, and 2.9% of improved accuracy with respect to other method using multiple classifiers, so called CDM(Commitee Decision Mechanism) method.
Trend of IoT-based Healthcare Service
Heo, Sung-Phil ; Noh, Dong-Hee ; Moon, Chang Bae ; Kim, Dong-Sung ;
IEMEK Journal of Embedded Systems and Applications, volume 10, issue 4, 2015, Pages 221~231
DOI : 10.14372/IEMEK.2015.10.4.221
This paper provides the trend of Internet of Things (IoT) for smart healthcare services and applications. IoT has provided a promising opportunity to build intelligent healthcare system and smart wearable applications by using the growing capability of wireless mobile devices, interactive sensors/actuators, and RFID technologies. For analysis of state-of-art technology of smart healthcare system, this paper includes comparative analysis and investigation of existing standard, network protocol, and devices, etc. In this paper, we examine the market trend of IoT healthcare. In particular, we examine the variety of IoT based healthcare type such as mobile, wearable device. After that, we examine the technologies of IoT healthcare such as standard, sensor, network and security. This survey contributes to better understanding of the challenges in existing IoT healthcare and further new light on future research directions.
Heterogeneous Operating Systems Integrated Trace Method for Real-Time Virtualization Environment
Kyong, Joohyun ; Han, In-Kyu ; Lim, Sung-Soo ;
IEMEK Journal of Embedded Systems and Applications, volume 10, issue 4, 2015, Pages 233~239
DOI : 10.14372/IEMEK.2015.10.4.233
This paper describes a method that is integrated trace for real-time virtualization environment. This method has solved the problem that the performance trace may not be able to analyze integrated method between heterogeneous operating systems which is consists of real-time operating systems and general-purpose operating system. In order to solve this problem, we have attempted to reuse the performance analysis function in general-purpose operating system, thereby real-time operating systems can be analyzed along with general-operating system. Furthermore, we have implemented a prototype based on ARM Cortex-A15 dual-core processor. By using this integrated trace method, real-time system developers can be improved productivity and reliability of results on real-time virtualization environment.
An Experimental Analysis of Linux TCP Variants for Video Streaming in LTE-based Mobile DaaS Environments
Seong, Chaemin ; Hong, Seongjun ; Lim, Kyungshik ; Kim, Dae Won ; Kim, Seongwoon ;
IEMEK Journal of Embedded Systems and Applications, volume 10, issue 4, 2015, Pages 241~255
DOI : 10.14372/IEMEK.2015.10.4.241
Recent network environment has been rapidly evolved to cloud computing environment based on the development of the Internet technologies. Furthermore there is an increasing demand on mobile cloud computing due to explosive growth of smart devices and wide deployment of LTE-based cellular networks. Thus mobile Desktop-as-a-Service(DaaS) could be a pervasive service for nomadic users. In addition, video streaming traffic is currently more than two-thirds of mobile traffic and ever increasing. All such trends enable that video streaming in mobile DaaS could be an important concern for mobile cloud computing. It should be noted that the performance of the Transmission Control Protocol(TCP) on cloud host servers greatly affects Quality of Service(QoS) of video streams for mobile users. With widely deployed Linux server platforms for cloud computing, in this paper, we conduct an experimental analysis of the twelve Linux TCP variants in mobile DaaS environments. The results of our experiments show that the TCP Illinois outperforms the other TCP variants in terms of wide range of packet loss rate and propagation delay over LTE-based wireless links between cloud servers and mobile devices, even though TCP CUBIC is usually used in default in the current Linux systems.
A Way-Point Tracking of Hovering AUV by PID control
Kim, Min J. ; Bae, Seol B. ; Baek, Woon-Kyung ; Joo, Moon G. ; Ha, Kyoung Nam ;
IEMEK Journal of Embedded Systems and Applications, volume 10, issue 4, 2015, Pages 257~264
DOI : 10.14372/IEMEK.2015.10.4.257
For the tracking of the way-points of hovering AUV (HAUV), we suggest a simple PID controller. The way-points are designed to approach to a virtual underwater structure and the heading angles at each way-point are set to look at the structure in the face. The proposed controller consists of a vertical controller to maintain the depth and pitch angle, and a horizontal controller to move to the desired position as well as to adjust the heading angle of the HAUV. In the simulation using Matlab/Simulink, the HAUV with the proposed PID controller is shown to track all the way-points within 1 m range while maintaining proper heading angle at each way-point.