• Journal of Information Technology Applications and Management
• /
• v.14 no.2
• /
• pp.1-10
• /
• 2007

The ubiquitous computing system is expected to be widely utilized in digital home, logistics control, environment/disaster management, medical/health-care services and other applications. The ubiquitous sensor network (USN) is a key infra-structure of this system. Nodes in the USN are exposed to adverse environments and required to perform their missions with very limited power supply only. Also the sensor network is composed of much more nodes. In case some node consumes up its power capacity under a certain required level, the network topology should change and re-routing/ re-transmission of data is necessitated. Resultantly communication protocols studied for conventional wireless networks or ad-hoc networks are not suitable for the sensor network. Schemes should be devised to control the efficient usage of node power in the sensor network. This paper proposes a routing algorithm to enhance the efficiency of power consumption for USN node and analyzes its performance by simulation.

• Journal of Sensor Science and Technology
• /
• v.18 no.6
• /
• pp.409-416
• /
• 2009

A lot of valuable-piece of information are acquisited through ubiquitous sensor network(USN) system composed of man-made sensors. The telemetry system used for communicating to access informations between nature and human-beings monitors and estimates the status of infrastructure, utilities and natural environments to prevent hidden disasters, improving quality of life and productivity in multi-directional views. That would be the reason of USN subsistence. This paper will be a review on how to build long-term USN system. Therefore, this paper focuses on reviewing the sensor interface and the sensor network interface and its significance as the foundation stone for varying USN service profiles and showing its development example, and finally proposing a few of things to set up future-oriented USN open system.

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

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
• /
• 2010.10a
• /
• pp.485-488
• /
• 2010

Recently, as the dissemination of the Internet and development of computer network technology, Research is actively underway for realization of the next-generation computing paradigm called Ubiquitous Computing. It will not be constrained by Space-time and It will be a cornerstone of human-oriented services. Such ubiquitous computing as a core technology for USN (Ubiquitous Sensor Network) is presented. In this paper, the sensor information into a standardized form to describe the information describing standards and USN sensor applications for the service standard for directory services protocols were investigated.

• Journal of the Korea Institute of Information and Communication Engineering
• /
• v.16 no.2
• /
• pp.378-383
• /
• 2012

Nowadays, the study is going on develop USN(Ubiquitous Sensor Network) with diffusion of the internet and development of computer network technology. USN sensor nodes equipped with various types of sensors provide sensor information to each individual sensors. To do this there needs standardized data description language for allowing many people to use based on XML in web services environment. In this paper, USN sensor information required for application services in a standardized form to describe the sensor data representation language was designed. USN-based technology utilized in the field, and will be utilized for service activation.

• Journal of the Korea Institute of Information and Communication Engineering
• /
• v.14 no.3
• /
• pp.774-780
• /
• 2010

USN(Ubiquitous Sensor Network) is a core infrastructure that u-life use to enable the realization in the ubiquitous society through various services of area such as u-city, u-Health. Therefore, we need a research for domestic standards to establish USN technique. Currently, status of USN standards is most standard and research that it is a technology for sensor node implementation and a protocol for energy-efficient communication and interlock with existing network. But, Standard and research for sensor network and integration management of heterogeneous sensor networks for USN application and sensing data management and USN database structure definition such as application and middleware is weak level. In this paper, we researched for standard development of domestic a sensor network and the relevant standard analysis to configure SWE(Sensor Web Enablement) of OGC(Open Geospatial Consortium) for standarded plattform technology. Also we researched that it's a connection between domestic ITA(Telecommunications Technology Association) standards and SWE Standard.

• Journal of Advanced Navigation Technology
• /
• v.19 no.6
• /
• pp.643-647
• /
• 2015

Nowadays, ubiquitous technology which combines sensors and network technology is emerging and it is called ubiquitous sensor network (USN). In this paper, mobile application for baby care using smart sensor is proposed. The proposed mobile application consists of mobile networks to transfer the information. It detects various information such as falling detecting, crying and fever detecting of infants. It keeps infants from external threats. The developed mobile application will be examined by simulation.

• Journal of the Korea Society of Computer and Information
• /
• v.15 no.8
• /
• pp.173-180
• /
• 2010

This research aims to enhance the security and safety of bicycle facilities by utilizing convergence technology of ubiquitous sensor network in the transportation system. To achieve the aim, U-bike system has developed by utilizing sensor network technology, and the serviceability and safety function of public facilities in the system have enhanced. This research also presents a plan for the construction of U-bike using ubiquitous sensor network and safety infrastructure of facilities by analyzing bicycle traffic reports and characteristics of service through studying the literature on the security of bicycles and the safety of facilities on bicycle lanes. The result of this research will contribute to the enhancement of safety function of bicycle lanes and facilities around National 4 major rivers bicycle lanes in the future.

• Journal of the Korean Society of Hazard Mitigation
• /
• v.8 no.4
• /
• pp.9-16
• /
• 2008

Ubiquitous technology is proposed which is used wireless sensor network for deflection management at casting and after casting of FCM bridge. Proposed method are analyzed which are sensor experiment and existing FCM bridge using ubiquitous sensor network. Wireless sensor network enables low-cost sensing of environment. As a results, the field application shows that USN is useful method for structural health monitoring system which long distance away.

• Journal of the Korea Institute of Information and Communication Engineering
• /
• v.13 no.5
• /
• pp.854-859
• /
• 2009

Many pilot projects are developed using USN(Ubiquitous Sensor network). Recently USN has more attention to be used for the applications of circumstance monitoring. In order to acquire information from sensor nodes, sensor nodes need a RF transceiver. In this paper we describe the design of a RF transceiver, based on IEEE 802.15.4, for sensor nodes operating in 2.4GHz frequency band. The architecture to be implemented and the electrical performance specifications satisfied IEEE 802.15.4 are presented. The noise figure of a receiver, selectivity, phase noise of a frequency synthesizer, transmitter's linearity and spectrum mask are derived as a design parameters from the specifications of IEEE 802.15.4.