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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
> Journal Vol & Issue
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 7, Issue 6 - Dec 2012
Volume 7, Issue 5 - Oct 2012
Volume 7, Issue 4 - Aug 2012
Volume 7, Issue 3 - Jun 2012
Volume 7, Issue 2 - Apr 2012
Volume 7, Issue 1 - Feb 2012
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Multi-layer Surveillance System based on Wireless Mesh Networks
Yoon, Tae-Ho ; Song, Yoo-Seoung ;
IEMEK Journal of Embedded Systems and Applications, volume 7, issue 5, 2012, Pages 209~217
DOI : 10.14372/IEMEK.2012.7.5.209
In the present, Wireless Sensor Network(WSN) has been used for the purpose of the military operation with surveillance systems and for collecting useful information from the natural environment. Basically, low-power, easy deployment and low cost are the most important factors to be deployed for WSNs. Lots of researches have been studied to meet those requirements, especially on the node capacity and battery lifetime improvements. Recently, the study of wireless mesh networks applied into the surveillance systems has been proceeded as a solution of easy deployment. In this paper, we proposed large-scale intelligent multi-layer surveillance systems based on QoS assuring Wireless Mesh Networks and implemented them in the real testbed environment. The proposed system explains functions and operations for each subsystem as well as S/W and H/W architectures. Experimental results are shown for the implemented subsystems and the performance is satisfactory for the surveillance system. We can identify the possibility of the implemented multi-layer surveillance system to be used in practice.
Software Platform for Stability Assure of Sensor Network in u-Health Environment
Jung, Min Woo ; Cho, Jeonghun ;
IEMEK Journal of Embedded Systems and Applications, volume 7, issue 5, 2012, Pages 219~226
DOI : 10.14372/IEMEK.2012.7.5.219
The rises of the life index quality together with the medical technology improvement lead to a longer life expectancy. Then a better health care program, especially for elderly, is needed. The common health problems facing those senior citizens are changed from acute diseases to chronic diseases, such as diabetes, hypertension. Then u-Health takes center stage in medical industry. Although u- Health medical device manufacturers have been improving their instruments, these instruments still rely on proprietary technologies without fixed platform. Even if the interface has been provided by the manufacturer, there is no widely-accepted uniform data model to access data of various u-Health devices. IEEE 11073 is a standard attempting to unify the interfaces of all medical devices. In this paper we have proposed a conversion software platform that assures interoperability among medical devices for ubiquitous sensor network. This module uses in order to develop a standard platform of medical system.
Study on Design of Embedded Control Network System using Cyber Physical System Concept
Park, Jee-Hun ; Lee, Suk ; Lee, Kyung-Chang ;
IEMEK Journal of Embedded Systems and Applications, volume 7, issue 5, 2012, Pages 227~239
DOI : 10.14372/IEMEK.2012.7.5.227
Recent advances in electronics have enabled various conventional products to incorporate with numerous powerful microcontroller. Generally, an embedded system is a computer system designed for specific control functions within a larger system, often with real-time computing constraints. The growing performance and reliability of hardware components and the possibilities brought by various design method enabled implementing complex functions that improve the comport of the system`s occupant as well as their safety. A cyber physical system (CPS) is a system featuring a tight combination of, and coordination between, the system`s computational and physical elements. The concept of cyber physical system, including physical elements, cyber elements, and shared networks, has been introduced due to two general reasons: design flexibility and reliability. This paper presents a cyber physical system where system components are connected to a shared network, and control functions are divided into small tasks that are distributed over a number of embedded controllers with limited computing capacity. In order to demonstrate the effectiveness of cyber physical system, an unmanned forklift with autonomous obstacle avoidance ability is implemented and its performance is experimentally evaluated.
Efficient Data Distribution Service in CPS
Lee, Soo-Hyung ; Kim, Won-Tae ; Ryou, Jae-Cheol ;
IEMEK Journal of Embedded Systems and Applications, volume 7, issue 5, 2012, Pages 241~246
DOI : 10.14372/IEMEK.2012.7.5.241
As the convergence between the conventional physical systems and IT computing resource is increased, the new paradigm of embedded system called Cyber Physical System (CPS) emerged. CPSs have many sensors, actuators and computing devices to understand and to control the physical system. As these all components are tightly coupled each other, standardized middleware such as Data Distribution Service (DDS) is considered to be deployed. But DDS takes too long time to discover each other in the large-scal CPS environment and has not precise specification of its execution architecture to provide efficient data exchange. In this paper, we design the efficient DDS architecture for development with interoperability to provide the high reliable data distribution. in real-time and propose the communication entity discovery procedure.
Design and Implementation of Sensor Network based Autonomous Vehicle Control System
Jang, Won-Chul ; Kim, Jong-Myon ;
IEMEK Journal of Embedded Systems and Applications, volume 7, issue 5, 2012, Pages 247~253
DOI : 10.14372/IEMEK.2012.7.5.247
This paper presents sensor network based autonomous vehicle system using a proposed image processing algorithm. The proposed image processing algorithm consists of pre-processing and five-stage image processing: coordinate calculation, driving area decision, line segment calculation, steeling decision, and acceleration decision. We evaluate the performance of the proposed algorithm on both straight road and curved road. Experimental results indicate that the proposed algorithm works well for autonomous vehicles. However, control accuracy of the proposed algorithm decreases as speed is increasing.
The Study on the Cyber Security Requirements of Cyber-Physical Systems for Cyber Security Frameworks
Park, Soo-Youl ; Choi, Wook-Jin ; Chung, Bo-Heung ; Kim, Jeong-Nyeo ; Kim, Joo-Man ;
IEMEK Journal of Embedded Systems and Applications, volume 7, issue 5, 2012, Pages 255~265
DOI : 10.14372/IEMEK.2012.7.5.255
A cyber-physical system(CPS) is a collection of cyber and physical components that interact with each other to achieve a particular application. Here, the CPS is emerged the reliability and security problems. Particularly, the defect of reliability in the data/control transmission under the CPS can lead to serious damage. We discuss the reliability and security problem on CPS architecture. Then we would suggest the considerations of cyber security in industrial control systems built with CPS.
Model-based Autonomic Computing Framework for Cyber-Physical Systems
Kang, Sungjoo ; Chun, Ingeol ; Park, Jeongmin ; Kim, Wontae ;
IEMEK Journal of Embedded Systems and Applications, volume 7, issue 5, 2012, Pages 267~275
DOI : 10.14372/IEMEK.2012.7.5.267
In this paper, we present the model-based autonomic computing framework for a cyber-physical system which provides a self-management and a self-adaptation characteristics. A development process using this framework consists of two phases: a design phase in which a developer models faults, normal status constrains, and goals of the CPS, and an operational phase in which an autonomic computing engine operates monitor-analysis-plan-execute(MAPE) cycle for managed resources of the CPS. We design a hierachical architecture for autonomic computing engines and adopt the Model Reference Adaptive Control(MRAC) as a basic feedback loop model to separate goals and resource management. According to the GroundVehicle example, we demonstrate the effectiveness of the framework.
Performance Evaluation and Analysis for Discrete Wavelet Transform on Many-Core Processors
Park, Yong-Hun ; Kim, Jong-Myon ;
IEMEK Journal of Embedded Systems and Applications, volume 7, issue 5, 2012, Pages 277~284
DOI : 10.14372/IEMEK.2012.7.5.277
To meet the usage of discrete wavelet transform (DWT) on potable devices, this paper implements 2-level DWT using a reference many-core processor architecture and determine the optimal many-core processor. To explore the optimal many-core processor, we evaluate the impacts of a data-per-processing element ratio that is defined as the amount of data mapped directly to each processing element (PE) on system performance, energy efficiency, and area efficiency, respectively. This paper utilized five PE configurations (PEs
A Fast Scalable Video Encoding Algorithm
Moon, Yong Ho ;
IEMEK Journal of Embedded Systems and Applications, volume 7, issue 5, 2012, Pages 285~290
DOI : 10.14372/IEMEK.2012.7.5.285
In this paper, we propose a fast encoding algorithm for scalable video encoding without compromising coding performance. Through analysis on multiple motion estimation processes performed at the enhancement layer, we show redundant motion estimations and suggest the condition under which the redundant ones can efficiently be determined without additional memory. Based on the condition, the redundant motion estimation processes are excluded in the proposed algorithm. Simulation results show that the proposed algorithm is faster than the conventional fast encoding method without performance degradation and additional memory.