• IEMEK Journal of Embedded Systems and Applications
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• v.5 no.1
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• pp.29-38
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• 2010

It is highly requested that the more complicated embedded software is used for high performance and multiple functions of the systems. This is inevitably increasing the errors. Therefore the embedded software testing is getting important recently. There are not general testing methods which are able to be applied for any embedded systems, but via this research, we introduce a testing method which is based on TTCN-3, a testing standard, for embedded systems. A testing environment for network-based embedded software is implemented with considering the features of TTCN-3 testing which is based on message exchange. The testing environment has two additional parts with TTCN-3 test system, the network analyzer to access the network-based systems and the communication interface which is suggested for embedded systems in previous work, and we have implemented the whole testing environment with interacting these two parts. In addition to the normal testing domain, called single node testing as a unit testing of V-model, we suggest another concept to test multiple nodes in network. It could be achieved by adding keywords such as supervisor and object which are describing the feature of TTCN-3 testing component and generating the TTCN-3 Executable code which contains new keywords. The testing has done for embedded software which is based on CAN network and the demonstration of the testing environment has been shown in this paper.

• Proceedings of the Korean Information Science Society Conference
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• 2001.10c
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• pp.439-441
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• 2001

본 논문에서는 ARM7TDMI CPU를 기반으로 한 네트워크 장비에 구현된 DHCP의 설계 및 구현에 대하여 논한다. 실시간 운영 체제인 uC/OS와 Watt TCP/IF 등의 소프트웨어가 탑재되어 있는 시스템에 DHCP를 구현 함으로써, 네트워크 설정이 편리한 시스템이 되도록 하였다. 제안할 'tiny-DHCF' 는 본래의 기능은 수행하면서, 그 크기를 축소한 것이다. 임베디드 시스템에서 더 경제적으로 구현할 수 있는 소형 UHCP인 'tiny UHCP' 적용 방법에 관하여 논의하고자 한다.

• Proceedings of the Korean Information Science Society Conference
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• 2005.11b
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• pp.475-477
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• 2005

향후 유비쿼터스 컴퓨팅 환경에서의 임베디드 소프트웨어는 다원화된 네트워크 환경에서 동작하게 될 것이다. 임베디드 소프트웨어가 이 기종의 시스템에서 다양한 형태의 응용 프로그램으로 쉽게 탑재되기 위해서는 설계와 코드의 재사용이 필수적이다. 임베디드 시스템에서 소프트웨어 설계의 재사용이 가능하다면 개발 시 소요되는 시간과 비용이 절감될 것이다. 그러나 임베디드 소프트웨어는 많은 부분이 시스템에 의존적이기 때문에 재사용이 어렵다는 단점을 가지고 있다. 본 논문에서는 이러한 단정을 해결하고자 기존의 MDA 메커니즘과 개선한 Multiple V-model의 접목을 시도하고 임베디드 소프트웨어 컴포넌트 설계의 재사용을 제안하다. 그리고 적용사례로서, 이기종의 임베디드 시스템들에 소프트웨어 컴포넌트를 탑재하였다.

• KIISE Transactions on Computing Practices
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• v.23 no.7
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• pp.417-423
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• 2017

Recently, many embedded devices that have the computing capability required for deep learning have become available; hence, many new applications using these devices are emerging. However, these embedded devices have an architecture different from that of PCs and high-performance servers. In this paper, we propose a method that improves the performance of deep-learning framework by considering the architecture of an embedded device that shares memory between the CPU and the GPU. The proposed method is implemented in Caffe, an open-source deep-learning framework, and is evaluated on an NVIDIA Jetson TK1 embedded device. In the experiment, we investigate the image recognition performance of several state-of-the-art deep-learning networks, including AlexNet, VGGNet, and GoogLeNet. Our results show that the proposed method can achieve significant performance gain. For instance, in AlexNet, we could reduce image recognition latency by about 33% and energy consumption by about 50%.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2007.06a
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• pp.690-694
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• 2007

This study provide Car driver with car sensor information which is car trouble code in engine and many sensors. This provide car manager with many information of tar sensors when we go to vehicle maintenance. This system consist of embedded linux system which uses RS232 and EML327 for CAN communication of car system. This System can control digital appliances in home network using wireless and ZigBee. Finally this is a lot of application for embedded linux system which get sensor informations of car control sensor system.

• The Journal of the Korea Contents Association
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• v.21 no.6
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• pp.51-61
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• 2021

In the era of the 4th industrial revolution symbolized by the Internet of Things, big data and artificial intelligence, various embedded devices are increasing exponentially. These devices have communication functions despite their low specifications, so the possibility of personal information leakage is increasing, and security threats are also increasing. Embedded devices can have security issues at most levels, from hardware to services over the network. In addition, it is difficult to apply general security techniques because it has characteristics of resource constraints such as low specifications and low power, and the related technology has not been standardized. In this study, we present vulnerabilities and possible problems and considerations in applying SDN to embedded devices in consideration of structural characteristics and real-world discovered cases. This study presents vulnerabilities and possible problems and considerations when applying SDN to embedded devices. From a hardware perspective, we consider the problems of Wi-Fi chips and Bluetooth, the problems of open flow implementation, SDN controllers, and examples of structural properties. SDN separates the data plane and the control plane, and provides a standardized interface between the two, enabling efficient communication control. It can respond to the security limitations of existing network technologies that are difficult to respond to rapid changes.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.12 no.3
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• pp.1336-1340
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• 2011

In this paper, the efficient prevention of cross talk technique for basically avoiding the confusion problem between the overlapped ubiquitous network of the other object is developed within the same area. The intelligent unified wireless network remote meter reading system of the ubiquitous ZigBee base is developed based on this technology. Therefore, in this paper, each meter reading equipments managed the information of its own adjacent ZigBee channel. The intelligent network system steadily transmitting data a relay was developed based upon this information in each region through the flexible channel conversion technique.

• Proceedings of the Korean Information Science Society Conference
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• 2011.06b
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• pp.442-445
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• 2011

본 연구에서는 슈퍼컴퓨터를 이용하여 분산 임베디드 시스템의 대표적인 응용인 센서네트워크 시스템 연구/개발에 사용할 수 있는 병렬 센서 네트워크 시뮬레이터에 관하여 연구를 수행하였다. 현재 센서네트워크 개발자들이 많이 사용하는 Avrora 라는 분산 시뮬레이터를 슈퍼컴퓨터에 적재하여 시뮬레이션 성능을 분석하고, 슈퍼컴퓨터를 이용하여 시뮬레이션 속도가 개선되는지를 확인하였으며, 이를 바탕으로 향후 이러한 분산 임베디드 시스템의 시뮬레이션 서비스를 제공하기 위해 개선되어야 하는 소프트웨어 및 시스템적 요구사항을 도출하였다.

• Proceedings of the Korean Information Science Society Conference
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• 2004.10c
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• pp.622-624
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• 2004

내부 시스템을 통합하는 비즈니스 관점에서 발전하던 웹 서비스가 모든 가정 내 통신과 가전제품을 연결하는 홈 네트워크와 같은 외부 시스템으로의 적용이 확대되면서 정차 보편화 되어가고 있다. 이런 외부 시스템으로의 적용을 위해서는 웹 서비스와 홈 네트워크 장치 간의 정보를 변환하고 제어하는 미들웨어 개발이 필요하다. 본 논문에서는 홈 네트워크의 자동 탐지 및 제어를 위한 UPnP 표준 기술과 서로 다른 플랫폼이나 언어로 작성된 어플리케이션 통합에 대한 표준 메커니즘을 제공하는 웹 서비스 기술을 이용하여 홈 네트워크나 유비쿼터스 환경에서의 분산 어플리케이션 개발 및 연계를 용이하게 하는 미들웨어를 설계 하고 구현하였다. 이 미들웨어를 임베디드 타입으로 개발함으로써 셋탑박스 또는 가정 내 모든 디바이스들에 내장 형태로 구성이 가능해짐으로 확장성을 제공한다.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2003.10a
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• pp.243-246
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• 2003

The design of router that converts IP packets from IPv4 network to IPv6 network using embedded Linux toolkit based on processor is presented. As an address transition platform, IPv6 module is transplanted to Linux using processor and the experiment was done with IPv4 and IPv6. In order to build the test network, it is constructed with Tunneling mechanism of IPv4 and IPv6 network. The packet value is obtained about 2$\mu$sec on average a 2 hops on the ICMP ping6.