• Title/Summary/Keyword: embedded system

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The study of verification for reliability in train control embedded system (열차 제어 임베디드 시스템에서의 신뢰성 검증에 관한 연구)

  • Hong, Hyo-Sik
    • Proceedings of the KSR Conference
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    • 2009.05a
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    • pp.483-494
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    • 2009
  • Since the embedded system is more intelligent, the importance of the reliability in the embedded system is a lot more visible. Especially the reliability of the embedded system in the train control system is even better important. As the special quality of the embedded system, the hardware of the system is directly controlled by the software in the embedded system. As the expansion of complexity, the expense amd the time for verification is required more and more. This paper is presented the verification of the reliability as the method with background of failure Embedded system is gradually, the importance of 'A built-in on the system embedded system's reliability is focused. In particular, in the train control system built-in of the embedded system, reliability is even more important. The embedded system of the system controls over hardware, software with built-in directly. The more complex system is, the more increasable of depending on the reliability of the time verification and expensive is. This paper is about he characteristics of the reliability and verification of embedded system under the failure mechanisms, based on the verification methodology suggested by in the train control system.

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HW-SW Embedded System (HW-SW 임베디드 시스템)

  • Park, Chun-Myoung
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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    • 2013.10a
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    • pp.880-881
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    • 2013
  • This paper present a method of constructing embedded system based on the hardware and software which is a center of 21th information technology. For the purpose of that, we discuss the embedded system classification and necessity also the main points which is the key when we constructing the embedded system. We discuss the embedded system modelling. The proposed hardware and software embedded system be able to contribute future advanced information technology upcoming.

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Implementation of the Embedded System Screen Control using Text-Based Mobile Network (문자기반 모바일 네트워크를 이용한 임베디드 전광판의 원격제어 시스템의 구현)

  • Lee Yeon-Seok;Yoon Young-June
    • Journal of Institute of Control, Robotics and Systems
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    • v.12 no.1
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    • pp.72-77
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    • 2006
  • In this paper, a remote screen control by mobile networks on embedded system is implemented. For this system a server program is ported on the embedded system connected with internet. And on the side of a mobile phone, a client program is ported using GVM. The embedded system can display the text from the mobile phone on its LCD. In the implemented embedded system, the text data from GVM emulator is sent to the system for display on its LCD. The realization of the proposed embedded system can display the text from a working mobile phone.

Implementation of the Embedded System Screen Control using Mobile Network (모바일 네트워크를 이용한 임베디드 전광판제어기의 구현)

  • Lee Yeon-Seok;Kim Yang-Woo
    • 한국정보통신설비학회:학술대회논문집
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    • 2006.08a
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    • pp.269-273
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    • 2006
  • In this paper, a remote screen control by mobile networks on embedded system is implemented. For this system a server program is ported on the embedded system connected with internet. And on the side of a mobile phone, a client program is ported using GVM. The embedded system can display the text and image from the mobile phone on its LCD. In the implemented embedded system the text and image data from GVM emulator is sent to the system for display on its LCD. The realization of the proposed embedded system can display the text :md image from a working mobile phone.

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A Reusability Enhancement Technique of Embedded System using Plug-In Method (플러그인 기법을 이용한 임베디드 시스템의 재사용 향상 기법)

  • Kim, Chul-Jin;Lee, Sook-Hee;Cho, Eun-Sook
    • Journal of the Korea Society for Simulation
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    • v.18 no.4
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    • pp.81-94
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    • 2009
  • Research of reusability and variability design for embedded system development is insufficient. An embedded system should be designed to support new devices. If extensibility of embedded system is not considered, it is difficult to reconstruct. Currently, the development productivity and reusability of embedded system are very poor, and this will be cased about problems of increasing maintenance and development cost, and decreasing system quality such as software crisis. In this paper, we present framework of embedded system that address those problems of embedded system. We suggest a plug-in technique, based on reusability framework, which can support various devices dynamically. Also, we propose a dynamic Meta model which is base on plug-in technique.

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Embedded Operating Systems;Windows CE, Embedded Linux, pSOS, uC/OS

  • Park, Kwang-Hyun;Jeon, Jae-Wook
    • 제어로봇시스템학회:학술대회논문집
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    • 2003.10a
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    • pp.1976-1981
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    • 2003
  • Except a desktop computer and workstation, an embedded system is a system containing microprocessors. While a desktop computer and a workstation are designed for a general purpose, an embedded system is designed for a dedicated purpose. Thus, an embedded system must meet some constraints such as low power consumption, low cost, small size, real-time, or user-defined ones. A simple and low cost embedded system may be able to be designed without using embedded operating systems (OS). However, considered design time and effort, some embedded system had better be designed with using embedded OS. Under given constraints and purpose of some embedded systems, one embedded OS can save more time, cost, and effort in designing those embedded systems than others. This paper compares four embedded OSs, Windows CE, Embedded Linux, pSOS, and uC/OS. It analyzes several issues of embedded OS such as process scheduling, inter-process communication (IPC), memory management, and network support. Also, it describes the product of each embedded OS.

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Designing Specific Object Tracking Robots with Enhanced Functionality (향상된 기능을 가진 특정 개체 추적 로봇 설계)

  • Kim, Ki-Sik;Lee, Jeong-Hun;Jeong, Young-Bin;Lee, Seung-Hyeon;Dong, Hong-Suk;Hwang, Kwang-il
    • Proceedings of the Korea Information Processing Society Conference
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    • 2019.10a
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    • pp.80-83
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    • 2019
  • 지능형 로봇 기술은 더 나은 생활을 위한 현대 기술의 집약체이다. 산업, 생활, 정밀 기술 등 다양한 분야에서 응용이 가능한 확장성 넓은 분야이다. 해당 분야의 추적 기술은 LIDAR를 활용하는 방향으로 활발한 연구가 진행 중이다. LIDAR는 사방의 거리를 정확하게 측정할 수 있는 유용한 센서지만, LIDAR만으로는 로봇의 성능을 최대화할 수는 없다. 본 논문은 LIDAR 추적을 연장하여 Vision 기술의 융합에 관련하여 서술한다. Vision 기술의 융합을 통한 향상된 기능을 가지는 추적 로봇 설계 방법을 제안한다.

Appplication of Role-based access control in Embedded OS (임베디드 OS에서의 역할기반 접근제어 적용)

  • Lim, Jae-Deok;Un, Sung-Kyong;Kim, Ki-Young;Kim, Jeong-Nyeo;Lee, Choel-Hoon
    • Proceedings of the KIEE Conference
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    • 2007.04a
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    • pp.163-165
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    • 2007
  • Recently, the security requirements of the embedded system which were not considered when the embedded system is independently deployed are being increased because the embedded system is connected to an internet. The connection to the internet of embedded system is the meaning that it is exposed to the various kinds of external attack and can be a victim to these attacks in anytime. Particularly, it is trend that the user-related information is stored into the personal terminals and/or electrical appliances such as PDA, home gateway for home network, settop boxes and so on. So it is needed the security mechanism which protects the user information from the malicious accesses. Accordingly, the coverage of the system security is being expanded from the general server to the embedded system. And it is not enough that the embedded system supports only its inherent functions and it becomes the essential element to provide the security function to the embedded system. This paper applies the RBAC(role-based access control) function to the embedded linux OS and tries to strengthen the security of the embedded linux OS. RBAC is implemented as a loadable kernel module with LSM(Linux Security Module) security framework for user's flexibility.

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Regular File Access of Embedded System Using Flash Memory as a Storage (플래시 메모리를 저장매체로 사용하는 임베디드 시스템에서의 정규파일 접근)

  • 이은주;박현주
    • Journal of Information Technology Applications and Management
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    • v.11 no.1
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    • pp.189-200
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    • 2004
  • Recently Flash Memory which is small and low-powered is widely used as a storage of embedded system, because an embedded system requests portability and a fast response. To resolve a difference of access time between a storage and RAM, Linux is using disk caching which copies a part of file on disk into RAM. It is not also an exception on embedded system. A READ access-time of flash memory is similar to RAMs. So, when a process on an embedded system reads data, it is similar to the time to access cached data in RAM and to access directly data on a flash memory. On the embedded system using limited memory, using a disk cache is that wastes much time and memory spaces to manage it and can not reflects the characteristic of a flash memory. This paper proposes the regular file access of limited using a page cache in the file system based on a flash memory and reflects the characteristic of a flash memory. The proposed algorithm minimizes power consumption because access numbers of the RAM are reduced and doesn't waste a memory space because it accesses directly to a flash memory Therefore, the performance improvement of the system applying the proposed algorithm is expected.

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