• Journal of Biosystems Engineering
• /
• 제32권3호
• /
• pp.197-205
• /
• 2007

The objective of this study was to design and implement a gateway for remote monitoring a combine. Many researchers have designed and implemented trouble-shooting system of agricultural machine. but the system didn't have network system or used wired network system. But monitoring machine have been operated in the out of door. In such an environment, each machine have to be operated under on a guarantee of mobility and stability. Thus, we have developed a gateway with an embedded system including the XScale PXA255 processor and wireless network device. We have also built an embedded Linux kernel and several devices. We developed an embedded application for monitoring a combine and this application is also capable of receiving signals from other clients and sending them to a server via Wireless LAN. Finally, results of performance evaluation which measured CPU share and memory sizes have shown that it is possible to provide monitoring service stably.

• 한국통신학회논문지
• /
• 제39B권2호
• /
• pp.75-85
• /
• 2014

본 논문에서는 모바일 단말에서 실행되는 여러 종류의 모바일 애플리케이션 트래픽 중, 급격히 증가하고 있는 SNS 트래픽을 해결할 방안으로 모바일 통합 SNS 게이트웨이를 제안한다. 현재 모바일 SNS 애플리케이션들은 해당하는 SNS 서버에 각각 대응하여 개별적으로 접근하여 정보를 갱신한다. 우리가 제안하는 통합 SNS 게이트웨이는 다양한 SNS 애플리케이션들을 하나의 통합된 애플리케이션에서 반복되는 트래픽을 줄이고, 모바일 통신 성능을 개선한다. 본 논문에서 제안한 방법은 통신 성능을 개선하고, SNS 사용자에게 통합된 SNS를 제공하기 위해서 캐싱 엔진, 동기화 그리고 통합인증기능을 포함하고 있으며, 실제 통신 환경을 구축하여 제안한 설계를 바탕으로 모바일 통합 SNS 게이트웨이 통신 모듈과 프로토콜을 구현한 후, 게이트웨이의 캐시율 및 응답 시간에 대한 성능평가를 하였다.

• 한국조명전기설비학회:학술대회논문집
• /
• 한국조명전기설비학회 2006년도 춘계학술대회 논문집
• /
• pp.302-308
• /
• 2006

We introduce the concept of a remote distributed embedded system to integrated fieldbus based control systems in internet/Intranet. As a result fieldbus systems are opened up for remote monitoring, remote maintenance, and remote control applications using state of the art Web-technology. This paper addresses the design of a remote distributed embedded system using Internet and CAN for multi-Induction motor of Building and Industrial field. The fieldbus used the CAN based networked intelligent multi-motor control system using DSP2812 microprocessor. To build such a system, the TCP/IP-CAN Gateway which convert a CAN protocol to TCP/IP protocol and vice verse, was designed. A experimental simulation system consists of a TCP/IP-CAN Gateway in remote place and a command PC ti be connected ti Ethernet.

• 전자공학회논문지SC
• /
• 제48권6호
• /
• pp.24-33
• /
• 2011

본 논문은 다른 종류의 프로토콜을 가지는 자동차 네트워크를 통합하기 위해 MOST 네트워크를 백본으로 하는 게이트웨이 시스템에 대한 것이다. 서로 다른 프로토콜들의 상위 계층의 메시지와 데이터 구조에 상관없이 서로간의 통신을 위해 MOST와 비슷한 구조를 가지는 Pseudo MOST 프로토콜을 설계하여 이를 데이터 수송을 위한 매개체로 이용하였다. 자동차 네트워크에 적용하기위해 일체형 게이트웨이와 소형 독립형 게이트웨이 두 가지 타입이 개발되었다. 일체형 게이트웨이는 이더넷포트, 영상 및 음성 포트를 가지고 있는 반면 소형 독립형 게이트웨이는 영상, 음성, 블루투스 그리고 Flexray용으로 각각 개발 되었다. 소형 독립형 게이트웨이를 이용한 네트워크 시스템 실험을 통해 개발된 게이트웨이가 서로 다른 프로토콜간의 데이터 송수신이 효율적으로 수행될 수 있음을 보여주었고 자동차 네트워크 통합용으로도 활용이 가능함을 보여주었다.

• International Journal of Advanced Culture Technology
• /
• 제4권3호
• /
• pp.13-19
• /
• 2016

The growth of mobile devices in Internet of Things (IoT) leads to a number of remote and controlling system related IoT applications. For instance, home automation controlling system uses client system such web apps on smartphone or web service to access the home server by sending control commands. The home server receives the command, then controls for instance the light system. The web service gateway responsible for handling clients' requests attests an internet latency when an increasing number of end users requests submit toward it. Therefore, this web service gateway fails to detect several commands, slows down predefined actions which should be performed without human intervention. In this paper, we investigate the performance of a web server-side platgorm based event-driven, non-blocking approach called Node.js against traditional thread-based server side approach to handle a large number of client requests simultaneously for remote and controlling system in IoT remote monitoring applications. The Node.JS is 40% faster than the traditional web server side features thread-based approach. The use of Node.js server-side handles a large number of clients' requests, then therefore, reduces delay in performing predefined actions automatically in IoT environment.

• 대한임베디드공학회논문지
• /
• 제4권3호
• /
• pp.126-133
• /
• 2009

There are already many researches providing u-Healthcare service, but they have left problems to be improved. First of all, the transmission range between sensor nodes and the gateway are restricted. Hence, patients feel uncomfortable because of they need to possess or locate closed to a gateway all the time when they aggregates their medical data. Also, the existing systems have not considered life environment that is important to analyze patient's diseases. Moreover, a guardian need to located close to patient or possess a mobile device that monitors a patients' status in real time when they are in outdoor. In this research, we present multi-hop packet transfer algorithm and compilation of life environment which help improve the problem of the existing researches. Likewise, we designed and implemented a medical information database and a real-time web monitoring system that manage patients' personal history and monitor a patients' status in real time. In this paper, we design and implement the u-Healthcare system based on mobile environment and we present a result when we tested our u-Healthcare system in scenario environment.

• 전자공학회논문지
• /
• 제51권1호
• /
• pp.233-240
• /
• 2014

최근 노인인구의 증가하는 추세에 따라 만성질환자의 수도 증가하고 있으며 건강 관리문제가 중요하게 대두되고 있다. 본 논문에서는 만성질환자의 건강관리를 위한 유헬스케어 시스템을 구현하고자 한다. 제안한 만성 질환자 관리 시스템은 생체 계측 시스템과 모바일 게이트웨이 그리고 의료정보 관리 서버 그리고 클라이언트로 구성되면 생체 신호는 심전도, 혈압, 혈당, 산소포화도 등의 모듈로 구성하였다. 혈당체크는 이동성을 고려하여 생체계측 시스템으로 전송하는 방법과 게이트웨이로 전송하는 방법 중 선택할 수 있도록 구현하였다. 제안한 생체 계측 시스템과 모바일 게이트웨이는 블루투스 통신을 이용하여 전송한다. 전송된 생체 데이터는 모바일 게이트웨이에서 건강상태를 감시하거나 네트워크 서버로 전송하고 클라이언트을 이용하여 검색 할 수 있도록 하였다. 만성질환자의 생체신호 감시 시스템을 구현함으로서 측정되어진 생체 데이터를 모니터링하여 현재의 건강상태를 확인할 수 있었으며 모바일 환경에서 다양한 생체신호를 전송하였다.

• 디지털산업정보학회논문지
• /
• 제12권1호
• /
• pp.63-69
• /
• 2016

Although the previous information technologies had been used for the quick and accurate processing of work, At present, however, as the combination with the Internet, the IOT(Internet-of-Things) era in which the diverse pieces of information are collected and handled through the sensor networks is in progress. Among these application fields of the IoT, the indoors position identification technology has been developing in the direction of providing the position information in the buildings of which the lengths and the interiors are complicated and in the direction of providing the various pieces of information and others of the like to the nearby customers. In this paper, we proposed an indoors position identification system that detects the patrol positions of the prison officers in the correctional facilities and in the prisons by using the ultrasonic waves, that transmits these to the control system and the data gateway, and that transmits the detected data. The Indoors Positioning identification System is organized with the tags for recognizing the positions that transmit the ultrasonic signal, ultrasonic receiver and data gateway. And the indoors position information data were transmitted to the management system through the data gateway. We evaluated the transmission error, by changing the distance of the proposed system for location recognition tag and the receiver, As a result, we found out that, when the transmission distance was 10 cm or less, the errors occurred in the form of the distortions. And when it was 110 cm or more, the transmission errors occurred due to the propagation diminutions of the ultrasonic wave signals. And when the transmission distance was from 10 cm to 100 cm, it was shown that the proposed system was possible without any errors.

• 한국컴퓨터산업학회논문지
• /
• 제3권5호
• /
• pp.623-630
• /
• 2002

본 논문에서는 Legacy 데이터베이스 사이의 데이터 이동을 지원하는 XML Gateway를 설계하고 구현하는 방법을 제안한다. 이를 위해 XML 기술, Oracle XML Utility, 그리고 JDeveloper를 사용한다. 그리고 데이터를 추출하기 위해 XSQL 페이지를 사용하고, 이를 파싱하고 XSL 변환을 거친 후 XSQL 서블릿의 XMLHttpRequest 객체를 사용하여 저장한다. 구현된 시스템을 사용함으로써 업무담당자는 SQL＊Plus 도구를 이용하여 작업을 처리하지 않아도 되며 시스템이 제공하는 익숙한 Web 환경 인터페이스를 사용하여 데이터 이동을 편리하게 처리할 수 있게 되었다.

• 한국IT서비스학회:학술대회논문집
• /
• 한국IT서비스학회 2010년도 춘계학술대회
• /
• pp.151-154
• /
• 2010

In this paper, we propose an energy monitoring and management service based on wireless sensors and a home gateway for homes and buildings. Homes and buildings have a significant energy saving potential compared with other sectors. Sensing, monitoring, and managing of the information on the energy consumption are required for an efficient energy saving service. The proposed system is composed of two main components, wireless sensor and an intelligent home gateway. Wireless sensors have the ZigBee communication interface for communication, and the intelligent home gateway is an energy portal. We expect that energy saving could be achieved with this system. As a further work, we will analyze the practical impact of the proposed service.