• Information and Communications Magazine
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• v.29 no.3
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• pp.58-67
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• 2012

미래인터넷 연구 아이디어를 검증하기 위한 테스트베드는 연구자들이 창의적인 네트워킹 개념들을 실험적으로 실증할 수 있도록 연결용 네트워크와 이에 연동된 장비들, 그리고 이를 지원하는 각종 실험용 소프트웨어 일체를 지칭하는 일종의 가상적인 실험실이어야 한다. 본 논문에서는 미래인터넷 테스트베드에서 수행될 실험과 이를 검증하기 위해 사용될 실험적인 설비 전반에 걸친 이해를 다음과 같이 돕고자 한다. 먼저 미래인터넷 테스트베드에서 사용하는 자원들에 대한 요구사항과 안정적으로 실험자원을 공급하기 위한 과정을 포함하여 슬라이스 기반으로 실험자원을 관리하는 이슈들을 설명한다. 이어서 실험자가 서비스 합성 기반 실험을 진행하는 전체적인 절차를 설명하고, 효율/확장 지향으로 테스트베드를 구축하고 운영하는 방식을 선택하는 수직적, 수평적인 접근 방식들도 비교한다. 마지막으로 FIRST@PC 사례를 통해 컴퓨팅/네트워킹을 균형 있게 다루는 새로운 서비스 지향 테스트베드 구축 노력을 설명한다.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2018.10a
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• pp.507-511
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• 2018

This paper proposes a method for system development for high speed (300MHz) test of system IC semiconductors. The high-speed test system proposes a high-speed test circuit interface and a PCB design method for noise reduction. This paper proposes evaluation items and procedures for verifying the performance of the developed system. System IC The development of high speed test systems will help optimize the development of domestic system IC test equipment.

• Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography
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• v.39 no.6
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• pp.525-531
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• 2021

The importance and utilization of underground spatial is increasing due to urban concentration. And so underground spatial information is being built. Because underground spatial information is an important NSDI (National Spatial Data Infrastructure), the accuracy and performance of underground spatial exploration devices used for construction are managed separately. In accordance with the laws and regulations related to spatial information, the government is conducting performance tests for underground facilities surveying equipment. The current performance test site mainly targets metal pipelines, and there is no absolute position surveying inspection system. In this study, test bed model for performance inspection of underground space exploration equipment was presented. The test bed presented in this study can be used as a test site to supplement the limitations of the existing domestic test bed and to verify the performance of the latest equipment.

• Journal of the Institute of Electronics Engineers of Korea SD
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• v.43 no.10 s.352
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• pp.104-110
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• 2006

The huge test data volume, test time and power consumption are major problems in system-on-a-chip testing. To tackle those problems, we propose a new test data compression technique. Initially, don't-cares in a pre-computed test cube set are assigned to reduce the test power consumption, and then, the fully specified low-power test data is transformed to improve compression efficiency by neighboring bit-wise exclusive-or (NB-XOR) scheme. Finally, the transformed test set is compressed to reduce both the test equipment storage requirements and test application time.

• Journal of IKEEE
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• v.18 no.1
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• pp.64-76
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• 2014

In the image acquisition tests of image sensors and modules, how to compare pixel values, how to digitize "defect", and how to determine "fault" are extremely varied from test equipments. Therefore, setup of test equipments for image acquisition characteristics should be customized for target devices under test. In general, test procedures are delivered as technical documents in not standardized but arbitrary formats. So test equipment should be manually programmed fitting individual setup condition. This costs huge time and effort and has high risk of human error. In this paper, the standardized description method is proposed to apply to almost all existing tests where various tests are described in a single framework.

• Journal of Broadcast Engineering
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• v.10 no.4 s.29
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• pp.599-609
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• 2005

There are many test parameters in the DTV measurement, which uses several test measuring instruments and miscellaneous devices. To operate all of those devices and analyse test results is a tedious and time-consuming process with a high error rate committed by inexperienced test crews. In this paper, we propose an integrated DTV measurement and analysis system(IMAS) that remotely controls and manages any instruments with standard network interface. This system can take, organize, store the field data into an integrated database and easily produce systematic output according to user-defined form. It can also measure several types of digital broadcasting signals such as DTV, DMB, DAB with generalized measurement procedures. Proposed measurement system was applied in the DTV field test by KBS and proved that it could enhance the accuracy and efficiency of entire test sequences and also dramatically reduce measurement time compared to conventional measurement systems.

• Electronics and Telecommunications Trends
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• v.10 no.4 s.38
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• pp.143-153
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• 1995

ATM 테스트베드는 응용서비스기능을 극대화할 수 있는 하부구조제시, ATM 통신망기능과 응용서비스간의 효율적 응용 프로그래밍 개발환경 제공, 이를 활용한 실제적 시험 및 검증, 그리고 최적 표준개발 유도를 통한 국제 경쟁력 확보 등 다양한 기능을 제공할 수 있는 효과적인 기반이라 할 수 있다. 본 논문에서는 이와 같은 필요성을 만족시킬 수 있는 ATM 테스트베드 구조를 제시하고, ATM 테스트베드를 구성하는 주요 시스템 및 관련장비들의 세부요구사항을 기술한다. 아울러 테스트베드 상에서의 LAN 서비스 수용방안과 APE(Application Programming Environment) 기능지원을 위한 요구사항 및 구현구조를 제시하며, 멀티미디어 서비스 지원을 위한 망, 단말구조 및 소프트웨어 구조에 대하여 기술한다.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2022.06a
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• pp.98-99
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• 2022

해양 산업은 e-Navigation 시스템을 시작으로 체계적인 접근 방식과 다양한 전략을 바탕으로 다양한 해양 서비스를 제공하고 있으며, 서비스 운영에 필수적인 장비 개발 및 스마트 항로표지 서버 구축 등 통합 운영이 가능한 스마트 항만 구축을 목표로 나아가고 있다. 그러나 고도로 자동화된 스마트 항만의 자율 시스템을 검증하기 위한 테스트베드는 기존의 테스트베드와 달리 복잡한 접근 방식과 다양한 요소가 필요하며, 특히 인공지능 등 최첨단 디지털 기술이 적용할 수 있게 됨에 따라 신규 서비스 제공과 이에 따른 잠재적으로 발생이 가능한 치명적인 문제점을 조기에 발견하고 대응하기 위하여 사이버보안체계 연구 및 이를 검증할 테스트베드 구축에 대한 준비가 필요한 시점이다.

• Korean Journal of Construction Engineering and Management
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• v.23 no.4
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• pp.3-14
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• 2022

Autonomous equipment requires a large amount of data from various environments. However, it takes a lot of time and cost for an experiment in a real construction sites, which are difficulties in data collection and processing. Therefore, this study aims to develop a virtual environment for autonomous tower cranes technology development and validation. The authors defined automation functions and operation conditions of tower cranes with three performance criteria: operational design domain, object and event detection and response, and minimum functional conditions. Afterward, this study developed a virtual environment for learning and validation for autonomous functions such as recognition, decision making, and control using the Unity game engine. Validation was conducted by construction industry experts with a fidelity which is the representative matrix for virtual environment assessment. Through the virtual environment platform developed in this study, it will be possible to reduce the cost and time for data collection and technology development. Also, it is also expected to contribute to autonomous driving for not only tower cranes but also other construction equipment.

• Journal of the Korean Society for Aeronautical & Space Sciences
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• v.44 no.9
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• pp.825-832
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• 2016

This paper describes the development of a data bus analyzer for use in avionics systems integration test. The data bus analyzer is equipped with MIL-STD-1553B, CAN and Ethernet interface cards which is incorporated in a majority of the avionics systems to accommodate a variety of interfaces. It has an individual hardware for a capture engine and a analyzing engine in order to perform the collection and the analysis of the bus data at the same time efficiently. It provides a data display function of the grid, 2-dimensional and 3-dimensional form to increase the data analysis efficiency. Verification of the data bus analyzer was carried out module unit testing and inter-module integration testing on the basis of the test procedures. Verification of interlocking requirement and usefulness of developed equipment was confirmed through an integration test result performed on a system integration laboratory of aircraft which is an actual testing environment.