• Journal of the Korean Society of Industry Convergence
• /
• v.20 no.5
• /
• pp.419-424
• /
• 2017

The purpose of this study is to develop a virtual testbed capable of predicting the functional performance of a linear electromagnetic actuator for a high voltage relay in order to reduce its development costs and time. The virtual testbed is defined by a multiphysics coupling approach in order to consider the complex interactions of multi-domains such as the solenoid model of electromagnets, the mass-spring-damper model of mechanical systems, the electric circuit model for an external control unit, and the thermal model for predicting temperature variations. The performances of the existing high voltage relay were estimated by the virtual testbed, and then the effectiveness and validation of the proposed testbed were discussed in comparison with the experimental test results. This study showed that the virtual testbed can be applied in design, optimization, and investigation of high voltage relays.

• Proceedings of the KSRS Conference
• /
• 2005.10a
• /
• pp.349-352
• /
• 2005

The telematics positioning testbed is an infrastructure to test and verify positioning technology, the sub-component of telernatics system. The positioning testbed provides the environment of performance analysis for acquisition of static and dynamic positioning information using telematics vehicle. This testbed consists of onboard positioning system, positioning reference station and lab positioning server. The onboard positioning system equipped in telematics vehicle, consists of target positioning system, reference positioning system, and analysis tool. A equipment acquiring high precision positioning data obtained from GPS combined with IMU was set as a reference positioning system. Analysis tool compares observed positioning data with high precision positioning information from a reference positioning system, and processes positioning information. Positioning reference station is RTK system used for reducing atmosphere error, and it transmits corrected information to reference positioning system. Positioning server which is located at laboratory manages positioning database and provides monitoring data to integrated testbed operating system. It is expected that the testbed supports commercialization of telernatics technology and services, integrated testing among component technology and verification.

• KSII Transactions on Internet and Information Systems (TIIS)
• /
• v.10 no.6
• /
• pp.2583-2605
• /
• 2016

Fingerprint positioning is a main stream and key technique for seamless positioning systems. In this paper, we develop a performance evaluation testbed for fingerprint based Wireless Local Area Network (WLAN) positioning system. The testbed consists of positioning server, positioning terminal, Access Point (AP) units, positioning accuracy analysis system and testing scenarios. Different from other testbeds tended to focus on testing in same situation, in the proposed testbed, a couple of scenarios are set to test the positioning system including indoor and outdoor environments. Handset-side positioning mode and network-side positioning mode are provided simultaneously. Variety of motion models, such as static model, low-speed model and high-speed model are considered as well as different positioning algorithms. Finally, some implementation cases are analyzed to verify the credibility of the testbed.

• The Journal of Korean Institute of Communications and Information Sciences
• /
• v.40 no.12
• /
• pp.2419-2426
• /
• 2015

Named Data Networking (NDN) is one of the powerfully evolving future internet architectures. In this paper installation, configuration and several tests are addressed to show how well and properly our NDN testbed have been prepared and established using NDN platform, in order to have interoperability with global NDN testbed. Global NDN testbed status with our NDN node participation was addressed. To verify one reachability on the NDN connection to global NDN testbed, a latency result is presented using NDN ping test.

• Proceedings of the Korean Society of Precision Engineering Conference
• /
• 2005.06a
• /
• pp.1024-1027
• /
• 2005

This paper describes the performance index of mobile robot and development of testbed which is used to evaluate the index. The developed testbed has rectangular structure similar to a living room of home. It is semi-automation testbed system for evaluation of cleaning performance index. This system is composed with scattering and cleaning equipment of test materials, equipment rifting of objects in inner space and sides itself, vision processing system. To be consistent of performance evaluation of cleaning robot, we make use of camera in this system for the sake of measurement of robot s mobility, path and suction quantity.

• Information and Communications Magazine
• /
• v.20 no.10
• /
• pp.43-49
• /
• 2003

우리나라는 아ㆍ태지역에서의 IT Hub 국가로 도약하고 첨단분야의 핵심기술기반을 확보하기위해 세계 선진 국가를 연결하는 TEIN, 아태지역 내 주요국가를 연결하는 APII Testbed 등의 초고속 연구망을 구축 운영하고 있다. APII Testbed는 1994년 APEC 정상회담에서 우리나라가 제안하고 1995년 제1차 APEC 정보통신장관회의에서 채택한 사업으로 아ㆍ태지역 정보통신 기반 구축을 위한 초고속 연구망이다. 또한 TEIN은 2000년 서울에서 개최된 제3차 ASEM 정상회의에서 채택된 ASEM의 국제기구사업으로 유럽과 아시아의 연구망을 연결하는 초고속 연구망으로서의 중요성을 갖는다. 현재, 국내 240개 기관이 TEIN/APII Testbed를 통해 IPv6, Grid 등 차세대 인터넷과 기상, 의료 등 다양한 기술응용분야에서의 국제공동연구가 수행되고 있으며, 아시아 및 유럽지역과의 급속한 연구수요 증가로 인해 TEIN/APII Testbed 증설이 적극 추진되고 있는 상황이다. 본고에서는 TEIN/APII Testbed의 추진배경 및 성과를 살펴보고 향후 발전방향을 전망하여 우리나라가 연구인프라 부문에서 한단계 진일보한 ‘IT 강국’으로서의 위상과 역할을 갖추기 위한 발전방안을 모색해 보고자 한다.

• Proceedings of the IEEK Conference
• /
• 2000.11a
• /
• pp.453-456
• /
• 2000

This paper describes IMT-2000 Testbed System which consists of ATM based IMT-2000 exchange(A-lMX), RNC simulator, HLR simulator, SCP simulator, B-ISDN subscriber simulator and MS simulator. Simulators were developed to verify the mobile functions and basic services of IMT-2000 like Videophone, VoD(Video on Demand), and Internet access. UPT(Universal Personal Telecommunication) service could be adapted well to this testbed system. Until the entire network elements are developed fully, this testbed system can be used to prove new services in IMT-2000 network.

• 제어로봇시스템학회:학술대회논문집
• /
• 2003.10a
• /
• pp.711-716
• /
• 2003

This study considers the implementation issues of the inter-vehicle communication system for the vehicle platoon experiments via a testbed. The testbed, which consists of three scale vehicles and one RCS(remote control station), is developed as a tool for functions evaluation between simulation studies and full-sized vehicle researches in the previous study. The cooperative communication of the vehicle-to-vehicle or the vehicle-to-roadside plays a key role for keeping the relative spacing of vehicles small in a vehicle platoon. The static platoon control, where the number of vehicles remains constant, is sufficient for the information to be transmitted in the suitably fixed interval, while the dynamic platoon control such as merge or split requires more flexible network architecture for the dynamical coordination of the communication sequence. In this study, the wireless communication device and the reliable protocol of the flexible network architecture are implemented for our testbed, using the low-cost, ISM band transceiver and the 8-bit microcontroller.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
• /
• v.9 no.2
• /
• pp.748-751
• /
• 2005

This paper introduces the testbed configuration for telematics wireless communications using terrestrial digital multimedia broadcasting (T-DMB) network. The testbed for telematics wireless communications is consisted of indoor laboratory testbed and outdoor field testbed. As a result of research, are derived testbed configurations for individual function verification at the indoor laboratory and performance test at the outdoor test road. In addition, a return channel configuration is described for interactive protocol as necessary for telematics services using T-DMB.

• Journal of KIISE:Information Networking
• /
• v.37 no.1
• /
• pp.16-26
• /
• 2010

We present a testbed for collecting log information and evaluating network security under various attacks. This testbed is modeled on real Internet, where attack traffic coexists with normal traffic. Attacks can be produced either by attack tools directly or by data sets including attack traffic. It costs less time and money than existing ones which are both costly and often time consuming in constructing. Also, it can be easily revised or extended according to the traffic types or the uses. Therefore, using our testbed can make various tests more efficient and facilitate collecting log information of sensors with attacks. We discuss how to use our testbed through replay procedures of DDoS attack and worm. We also discuss how we surmount some difficulty in constructing the testbed.