• The Journal of the Korea Contents Association
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• v.6 no.1
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• pp.126-136
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• 2006

This paper intended to observe the present state of the U-City development in local governments and to present the basic view-point to carry out it in the context of total urban area. Also, this paper has a meaning to present a fundamental perspective for making plan to go on the U-City development. For this reason, it was investigated on the concept of 'Ubiquitous', the related technologies to realize the U-City, the related policies for 'Ubiquitous' in the central government, and the circumstances of the U-City development in the local government. Finally, on developing the U-City in local government, this paper presented its developing direction in the context of the whole urban structure and in the relation with the developed urban areas.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.33 no.5B
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• pp.275-284
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• 2008

In this paper we design and implement a management framework base on JMX to control and manage ubiquitous home networks. To do this, we organize the ubiquitous home network test-bed that consists of information electronics and sensor devices. In the test-bed network, we implement the management framework which can control and manage various applications and devices in home network environment. In addition, it can also define and add new services easily. Moreover, it is possible to provide various management interfaces with multi-protocols. The framework is formed to integrate legacy management systems readily.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.9 no.3
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• pp.702-709
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• 2008

In this paper, Developed u-Marketing system prototype based on location base service could offer because this treatise combines personalized and mobility. It is u-Marketing system takes advantage of u-LBS base skill to support marketing that is old Mobile more efficiently u-marketing call center. If it was marketing in spam way that marketing to be Mobile passes public information contents one-sidely to unspecificness many customers so far, u-Marketing system takes advantage of u-LBS base skill-marketing system is u-marketing system of location base that can take advantage of subscriber's location information through portable phone or GPS with transfer telegraph operator adulterating member's distinction of sex, age, residential district, profession and support satisfied article ordered style Target marketing.

• Proceedings of the Korean Institute of Intelligent Systems Conference
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• 2006.11a
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• pp.391-394
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• 2006

This paper deals with the method will be able to support a common interface softly for the different with each other operating system users in next generation ubiquitous network. To controls in proxy servers that data portion be able to use commonly such as each different instruction, metaphor, image based on operating system, icons, it will be able to increases the efficiency of bandwidth use and minimizes a duplication transmission data from inside the bandwidth which is limited. Also it will be able to do method of common user interface provision to support seamless connectivity with each different network devices in the next generation.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2009.10a
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• pp.1014-1017
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• 2009

Ubiquitous makes it possible to expand a short-distant wireless communications infra and provide various services. Especially, it is very important to develop multimedia contents service technology through ZigBee and WPAN technology. But because the data transmission rate of IEEE 802.15.4 Standard ZigBee is low, there are many barriers for multimedia contents services. In this paper, to improve ZigBee that has the limitation of transmission rate in IEEE 802.15.4 Standard, an upgraded model to 1Mbps through MAC Layer remodeling is designed. And Zigbee-based broadcasting multimedia contents services system is designed and implementation to provide the service in Ubiquitous environment.

• Journal of the Korea Society for Simulation
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• v.18 no.4
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• pp.175-184
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• 2009

The distance of sensor nodes is an important factor in having influence on capability of networks in underwater acoustic sensor networks. Our proposed scheme is to establish an efficient distance to design a route of communication in underwater environment and it proposes a Level scheme that the areas divided by transmit/receive distance in network are given different levels. Our proposed scheme is pursued research to maintain a established route and maximize an energy efficiency. The established route will have fluid modification by an internal and external factors and it will construct more robust underwater sensor networks over our proposed multiple path configuration scheme.

• Journal of the Korea Society of Computer and Information
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• v.14 no.7
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• pp.143-150
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• 2009

Recently "Green IT" technology has been attracting public attention that the Ministry of Environment has come up with new plans to make "low carbon and green growth" technology and to promote u-City industries. Making an offer, Uubiquitous Service needs RFID/USN Middleware to handle heterogeneous RFID/USN devices in order to gather existing informations. In this paper, we propose the design and implementation of a dynamic management method for heterogeneous RFID/USN devices. In compliance with the paper I will furnish Uubiquitous Service regarding existing circumstances by handling heterogeneous RFID/USN devices such as new RFID/Sensor devices addition and deletion and so on.

• Journal of Korea Spatial Information System Society
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• v.8 no.3
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• pp.27-37
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• 2006

It defined the standard list of the urban foundation facility which from the local self-government it is managing with commonness and standard items and standard option and a construction plan it drew up "Urban Foundation Facility Electronic Library" it researched. "Urban Foundation Facility Electronic Library" defines with the aggregate of the component DB which lets to collect the organization, quality and form of the urban Foundation facility back attribute item system from the Geographic Information System(GIS). Consequently after the "Urban Foundation Facility Electronic Library" is constructed, it presented the application plan from on-the-spot inspection. Also it applied in the ubiquitous environment which is actualized quickly the plan which it does in the RFID and sensor network and electronic library grafting it presented. The connection use of the RFID and was possible from the Facility civil official test which applies the RFID.

• 한국HCI학회:학술대회논문집
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• 2008.02b
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• pp.47-52
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• 2008

J.E.N(Joint Enjoyment Network) is the ubiquitous UCC play contents system that provides amusements off-line by utilizing the UCC that people are able to participate in. It is also the entertainment service system that is devised to use contents that could be enjoyed through the cell phone and to make people participate in production, in cases of meeting people off-line during their pastime. The development of this system begins from pointing out the problem of the limitation of the UCC that does participate in production but the produced contents could only be watched, and the UCC only works on-line. The goal of researching this ubiquitous UCC play contents is to suggest the UCC entertainment service system that are available off-line by applying the interactive system to UCC and, by this, to obtain the positive responses about the off-line participating UCC contents. In this research, it chooses scenario and 테스크 performance as the method of deriving the participating UCC from the off-line, and it suggests the ubiquitous UCC play contents system through analyzing the behaviors in each off-line place. Moreover, by developing the prototype that could practically perform the system, it verifies the potentialities of the UCC entertainment service. The anticipation of this study is to make people participate and enjoy not only in production, but also in the contents made. This research will provide the modern people who concern about where to go and what to do with the amusements and will also present a way of new form of contents mixed with UCC and the entertainment service.

• Journal of the Institute of Electronics Engineers of Korea TC
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• v.47 no.1
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• pp.91-98
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• 2010

This paper proposes authority delegation for secure social community creation and mutual authentication scheme between the community members using proxy signature in community-based ubiquitous networks. In community-based ubiquitous network, User's context-awareness information is collected and used to provide context-awareness network service and application service for someone who need it. For the many reason, i.e. study, game, information sharing, business and conference, social community could be created by members of a social group. However, in community-based ubiquitous network, this kind of the context-awareness information could be abused and created by a malicious nodes for attack the community. Also, forgery community could be built up to attack the community members. The proposed scheme using the proxy signature provides a mutual authentication and secure secret key exchange between community members, and supports secure authority delegation that can creates social community. Also, when delegation of signing authority and mutual authentication, this scheme reduces total computation time compared to the RSA signature scheme.