• Proceedings of the Korean Institute Of Construction Engineering and Management
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• 2007.11a
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• pp.90-94
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• 2007

Location tracking automation of resources in construction industry is one of the most important procedures to improve construction project performance and reduce the period of construction. Recently, location tracking technologies have proven to be effective in tracking construction materials and equipment in real time through the instrumentality of RFID (Radio Frequency Identification). By using wireless communication and inter-working system between RFID and USN, it is possible that construction engineers receive the location information of construction resources without additional efforts that move the RFID reader to read tags periodically. In the inter-working system, RFID reader delivers the acquired materials information to sensor node which is connected by serial interface. Then sensor node transmits the received data to the data aggregation terminal that is a sink node. The data aggregation terminal can transmit collected data to construction manager who is out of construction site using infrastructure such as CDMA(Code Division Multiple Access) network. The combination model of the two system and field test scenarios are presented in this paper.

• Proceedings of the Korean Operations and Management Science Society Conference
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• 2006.05a
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• pp.1264-1271
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• 2006

최근 RFID/USN (Radio Frequency IDentity/Ubiquitous Sensor Network) 시장의 급격한 성장으로 비즈니스 영역에서 물류/유통 뿐만 아니라 국방, 창고 및 공정관리 등 영역을 지속적으로 확장하고 있다. 본 연구는 RFID를 이용한 농작물 개체관리와 USN을 이용한 농작물 생장환경 관리를 구현하고 두 시스템을 통합하는 비즈니스 모델(한국형 u-Farm 모델)을 제시하였다. 이를 통하여 소비자에게는 농작물 이력데이터를 제공하여 상품에 대한 신뢰성을 확보할 수 있고, 생산자는 생장환경정보를 주기적으로 획득하여 최적의 생산조건을 구현하는 기반을 마련하였다.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.38B no.9
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• pp.687-699
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• 2013

IP-based IP-USN overcomes that disadvantages of verify the existence and geographic limits of the sensor by applying a standard technique called 6LoWPAN. However, in terms of the management and cost, The USN node should work for a long period of time without periodic batter replacement. but this solution is insufficient.In this paper, we configure the node using TI's CC2530 that low-power Soc solution and Contiki OS for optimal low-power operation IP-USN and implement the gateway to support connecting IP networks and Sensor networks. In addition, a system implemented to measure and analyze the energy consumption of an independent power supply to look for ways.

• The Journal of the Korea institute of electronic communication sciences
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• v.5 no.4
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• pp.486-493
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• 2010

This paper demonstrates the design and implementation of fruit larder system that is able to monitor and control restoration environment using mobile equipment. Based on RFID/USN technology, it builds wireless sensor network to enhance its efficiency to fruit larder environment and inventory management and performs automated environment management through window-based application that works in desktop environment. Additionally, using WINC service, it provides remote control function for fruit larder using mobile equipment.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2014.05a
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• pp.247-249
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• 2014

Ubiquitous Sensor Network (USN) environments, sensors and sensor nodes, and coming from heterogeneous sensor networks consist of one another, the characteristics of each component are also very diverse. Thus the sensor and the sensor nodes to interoperability between metadata for a single definition, management is very important. For this, the standard language for modeling sensor SensorML (Sensor Model Language) has. In this paper, sensor devices, sensor nodes and sensor networks for information technology in the application stage XMDR-DAI -based metadata to define the USN. The proposed XMDR-DAI USN based store and retrieve metadata for a method for effectively agent technology. Metadata of the proposed sensor is based SensorML USN environment by maintaining interoperability 50-200 USN middleware or a metadata management system for managing metadata in applications can be utilized directly.

• Journal of the Korean Association of Geographic Information Studies
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• v.14 no.4
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• pp.150-160
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• 2011

IT convergence and integration technology aims to create new synergies by combining IT related technology and performance. This study conducted a basic research for combining construction and IT technology to create new synergies. Specifically, the purpose of this study is to combine USN and GIS technology and then apply it to urban facilities management. For this, we have developed the USN hardware, tested propagation communications, and made the GIS Algorithm and a system. Existing sensor node allocation method is mostly to install in a random way or with in-situ survey, but the problem with this method is contradictory to cost effectiveness and efficiency. To solve this problem, we developed a new method for sensor allocation. Using this method, the USN technology could be applied in the range of city unit. This technology can be applied to the ubiquitous urban development such as U-City and Smart City.

• KSCE Journal of Civil and Environmental Engineering Research
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• v.32 no.2D
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• pp.159-166
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• 2012

During concrete placement, the formwork structure supports the weight of concrete mass. The complexity of the operation can cause concentrated workloads, which in turn brings about a collapse of the temporary structure. As a countermeasure, the operation needs to be constantly monitored to maintain safety and prevent accidents. This paper presents a USN (Ubiquitous Sensor Network)-based safety monitoring system for formwork construction. The system takes advantage of ubiquitous technology in monitoring the behavior of the formwork structure such as deflection, load weight, and tilting. The collected data are sent to the host computer wirelessly for real time monitoring. The data can be then compared with the allowed limits on guidelines. The comparison can indicate whether the concrete placement operation is executed in a safe condition.

• Electronics and Telecommunications Trends
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• v.23 no.5
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• pp.67-78
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• 2008

환경 및 에너지 자원의 보호 일환으로 세계 각국에서 도입이 적극 검토되는 AMI는 에너지를 효율적으로 관리할 수 있는 서비스로, 소비자에게 실시간으로 에너지 사용량 정보가 제공되어 소비자 스스로 혹은 자동화된 기기 제어를 통해 에너지 사용을 제어함으로써 가정 및 기업의 에너지 비용을 절감할 수 있다. 또한 유틸리티 회사들 역시 검침 및 유지관리 비용의 절감뿐만 아니라 요구 응답과 에너지 부하 제어를 통해 피크 때의 최대 출력을 줄임으로써 에너지 생산 비용 혹은 추가적인 인프라 확장을 방지하는 효과를 기대할 수 있다. AMI 시스템 구축에 유용한 것으로 평가되는 USN 기술과 전력 기술을 융합한 USN 기반 AMI 서비스는 국내 에너지 효율 향상과 세계 AMI 시장 선점을 위해 연구개발이 필요하다. 본 고에서는 AMI 서비스 시장전망과 기술동향, 국내외 시범사업과 적용사례를 살펴본다. 마지막으로 AMI 제공을 위한 주요 기술들을 비교 분석하고, USN 기반 AMI의 국내적용에 대한 기회 및 위험을 살펴보기로 한다.

• Journal of Advanced Navigation Technology
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• v.18 no.6
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• pp.648-652
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• 2014

The core of existing IT industry has been multimedia contents based on internet network. But nowadays, ubiquitous technology which combines sensors and network technology is emerging and is called USN (ubiquitous sensor network). Health care industry is one of suitable areas for USN application. In this paper, sensor network for baby care is proposed. The proposed baby care system consists of bluetooth network to transfer information which comes from various sensors like falling detecting, crying and fever detecting sensor to keep infant's status safe from external-potential threats. The effectiveness of the implemented system is showed through demonstration.

• The Journal of the Korea Contents Association
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• v.9 no.12
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• pp.64-76
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• 2009

Recently, the ubiquitous environment and the practical technology associated with it become more popular topic along with the rapid development of wireless technologies. The necessity of the automated system based on the ubiquitous environment has been increasing when the concept of the ubiquitous is integrated into the fields of existing IT. Also, the necessity of formulating a power-saving plan on large buildings and public institutions is gathering strength because of a raise in exchange rates and high oil prices. In this paper, to efficiently manage the power consumption of the electronic machine such as electric lights, electric heaters, and air conditioners in a building, power-saving manage- ment system using RFID/USN technologies is proposed. Proposed system controls the electric machine and monitor it's condition by RFID and collects the real time information about the surrounding and the power consumption of the electric machine by USN. Especially, proposed system analyzes the real time information and supports the intelligent scheduler with the best power-saving. Finally, this paper shows the difference between proposed system and existing system and establishes thereality of our system through experiments in variety environments.