• Proceedings of the Korean Information Science Society Conference
• /
• 2004.10c
• /
• pp.619-621
• /
• 2004

ARP는 IP 네트워크 상에서 IP 주소를 물리적 네트워크 주소로 대응시키기 위해 사용되는 프로토콜이다. 네트워크에서 데이터를 전송할 때는 컴퓨터간의 물리적 주소를 이용하여 전승하는데 이 물리적 주소는 각각의 랜카드마다 고유하게 갖는 값으로 네트워크에서는 실제로 데이터를 전달할 때 네트워크 카드가 가진 물리적 주소를 이용하여 전달 하지만 소프트웨어 차원에서는 IP 주소라는 것을 사용한다. ARP 프로토콜은 IP 주소를 실질적인 네트워크 어댑터의 물리적 주소와 연관시킬 때 사용되는 것이다. 본 논문에서는 ARP 동보 패킷을 이용한 네트워크 강시 대상 노드들의 정보를 자동적으로 구축하는 기능을 갖는 네트워크 모니터링 시스템을 설계하고 구현한다. 본 네트워크 모니터링 시스템은 ARP 동보 패킷을 분석하여 네트워크 감시 대상 노드들을 인식하고 NETBIOS 모듈을 이용한 노드 이름 확인과 Ping 모듈을 이용한 노드 상태 및 정보를 표시하며 주기적인 업데이트를 통해 노드 정보를 표시하는 기능을 갖는다.

• Journal of IKEEE
• /
• v.24 no.4
• /
• pp.1069-1073
• /
• 2020

This paper presents the performance analysis of a long-range marine communication system developed for monitoring the fishing gears. LoRa based buoys were developed to monitor fishing gears. The buoy sends its coordinates along with other relevant information to the central monitoring station via a gateway. During the experiment, a up to 30 km of communication between a buoy and a gateway was successfully tested.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
• /
• 2016.05a
• /
• pp.558-559
• /
• 2016

현재 대부분의 출입관리시스템은 중앙 서버와 각각의 자동 개폐기로 구성된 중앙 관제 시스템으로 빈번한 출입이 필요한 환경에서의 출입보안에 목적을 두고 있다. 그러나 기존의 중앙집중식 관제 시스템은 인증기가 야외에 노출되거나 네트워크 인프라의 구축이 어려운 특수한 환경에서의 도입에 문제가 있다. 따라서 본 논문에서는 스마트폰을 인증키로 하는 출입관리시스템의 개발을 최종 목표로 하고 있으며, 이를 위해 출입관리시스템 웹 서버를 구현하였다. 출입관리시스템 서버는 개폐기 및 사용자관리, 개폐기 권한 할당, 지도기반 모니터링, 출입 모니터링, 출입내역 조회가 가능하다.

• Journal of KIISE:Computing Practices and Letters
• /
• v.10 no.3
• /
• pp.221-230
• /
• 2004

In general, remote monitoring systems monitor the status of distributed hosts and/or applications in real-time for diverse managerial purposes. However, most of the extant systems have a few undesirable problems. First of all, they are platform-dependent and are not resilient to network and/or host failures. Moreover, they normally focus on the resource usage trends in monitored hosts, rather than on the status change of the applications running on them. We strongly believe that the latter has more direct and profound effect on the resource usage patterns on each host. In this paper, we present the design and implementation of the Remote Applications Monitoring System (RAMS) that enables us to effectively manage distributed applications through a real-time monitoring of their respective resource usages. The RAMS is a centralized system that consists of many distributed agents and a single centralized manager. An agent on each host is in charge of collecting and reporting the status of local applications. The manager handles agent registration and provides a central access point to the selection and monitoring of distributed applications. The salient features of the system include robustness and portability The adoption of JINI greatly facilitates an automatic recovery from partial network failure and host failure.

• Proceedings of the KIEE Conference
• /
• 2011.07a
• /
• pp.1746-1747
• /
• 2011

BACnet(Building Automation and Control Network)은 빌딩 자동제어 시스템을 위해 개발된 데이터 통신 프로토콜로 ISO에 의해 국제 표준규격으로 제정되었으며, 지난 20여 년간 미국과 유럽을 중심으로 연구 및 개발이 활발히 진행되고 있다. 그러나 국내의 경우 아직까지 개발사례 및 연구활동이 미비한 실정이다. 이에 본 연구에서는 BACnet MS/TP 프로토콜 기반 네트워크 시스템의 실험적 성능해석을 위한 네트워크 모니터링 시스템의 개발 사례를 소개함으로써 BACnet의 국내 기술보급 및 기술확산에 기여하고자 한다.

• Proceedings of the Korea Air Pollution Research Association Conference
• /
• 2004.11a
• /
• pp.119-120
• /
• 2004

• Proceedings of the Korea Water Resources Association Conference
• /
• 2006.05a
• /
• pp.1305-1312
• /
• 2006

This study is about the development of measurement system using ubiquitous wireless communication for river flow monitoring. The system can acquire water depth, quality (temperature, pH, conductivity, turbidity etc.) while a GPS module for getting the location data of measurement points. Also this system is able to acquire the field data via RF connection and can be controlled same time. The acquired data is transmitted to a gateway system from the remote buoy using Zigbee wireless connection. And the gateway system is able to monitor the data through GIS monitoring tool. Finally the data are transmitted to a server computer using CDMA wireless connection by gateway system. The D/B of server computer are constructed automatically and monitored the project web site. The resulting system can be used for scour monitoring, environment monitoring and the other monitoring purposes such as a river flow monitoring system.

• The Journal of the Korea Contents Association
• /
• v.12 no.10
• /
• pp.22-34
• /
• 2012

In this paper, we design and implement an advanced cattle shed management system using a infrared wireless sensor nodes and surveillance camera. Our system provides three main capabilities, such as 24-hours cattle shed monitoring, trespassing detection, automatic control of cattle shed. For this, our system can monitor cattle shed as well as the condition of cows/bulls for 24 hours per day by using surveillance cameras. Our system also can detect intruders inside the cattle shed by using infrared wireless sensor nodes. In addition, our system can control the power of electric equipments in the cattle shed by using a power controller. Finally, we combine the three components into a system by using a smartphone application program and verify the effectiveness of our system by a testbed.

• Journal of Apiculture
• /
• v.34 no.1
• /
• pp.47-55
• /
• 2019

Honey bees are a vital part of the food chain as the most important pollinators for a broad palette of crops and wild plants. The climate change and colony collapse disorder (CCD) phenomenon make it challenging to develop ICT solutions to predict changes in beehive and alert about potential threats. In this paper, we report the test results of the bee-counting system which stands out against the previous analogues due to its comprehensive components including an improved dual infrared sensor to detect honey bees entering and leaving the hive, environmental sensors that measure ambient and interior, a wireless network with the bluetooth low energy (BLE) to transmit the sensing data in real time to the gateway, and a cloud which accumulate and analyze data. To assess the system accuracy, 3 persons manually counted the outgoing and incoming honey bees using the video record of 360-minute length. The difference between automatic and manual measurements for outgoing and incoming scores were 3.98% and 4.43% respectively. These differences are relatively lower than previous analogues, which inspires a vision that the tested system is a good candidate to use in precise apicultural industry, scientific research and education.

• Convergence Security Journal
• /
• v.8 no.2
• /
• pp.27-34
• /
• 2008

In this paper, we designed and implemented mobile object automatic system based on senor networks for telematics. For developing this system, we gather the various sensing data through wireless communication method using zigbee sensor networks and analyze them in monitoring equipment. And we enable the driver to recognize the car state information on the whole by interfacing analyzed data to telematics unit. And, we implemented automatic controller that can control temperature and humidity in car automatically by actuating air conditioner based on the data that was monitored throughout temperature sensor, humidity sensor and brightness sensor based on sensor networks.