• Proceedings of the Korean Information Science Society Conference
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• 2005.07a
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• pp.532-534
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• 2005

웨어러블 컴퓨터는 인간의 의복이나 사용자의 신체에 소형 디바이스를 장착하여 다양한 서비스를 제공하는 인간 친화적인 컴퓨터 기술이다. 웨어러블 컴퓨터를 구성하는 착용형/휴대형 디바이스는 웨어러블 서비스를 제공하기 위해 각 디바이스의 하드웨어/소프트웨어에 대한 정보 교환이 필요하다. 이 때 디바이스간에 교환되는 정보가 프로파일이다. 프로파일은 디바이스의 하드웨어적 구성 정보와 탑재된 소프트웨어 정보 그리고 제공하는 서비스에 대한 정보를 포함한다. 본 논문에서는 웨어러블 컴퓨팅에 적합한 프로파일 구조를 제시하고 웨어러블 컴퓨팅에서 핵심 웨어러블 디바이스로 대두될 블루투스 디바이스 지원을 위해 블루투스 프로파일을 수용하는 웨어러블 컴퓨팅용 프로파일을 설계한다.

• Journal of the Korea Institute of Information Security & Cryptology
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• v.27 no.2
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• pp.397-408
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• 2017

As mobile traffic increases rapidly, DMM (Distributed Mobility Management) has been proposed as a mobility management technology for seamless communication of mobile devices as mobile traffic increases rapidly. the DMM distributes mobility management from the core network to the edge network, enabling stable binding updates with low latency. However, the DMM still have network delay and security problems for sessions. In this paper, we point out the problems existing in the DMM and propose a new protocol in which the MN (Mobile Node) directly participates in authentication and mutual authentication is correctly performed to solve this problem. We demonstrate not only security improvements but also performance improvements with performance analysis.

• The KIPS Transactions:PartC
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• v.12C no.4 s.100
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• pp.581-588
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• 2005

The performance of mobile devices and wireless networks is improved rapidly and Mobility management skills such as Mobile IP and ad-hoc technology were developed. So the requirement of processing the distributed computing is highly increased in any place and any time or in the state of movement. Therefore we studied the mobile grid system to process the distributed applications properly in wireless networks. In addition to typical computational resources, Mobile Grid brings new resources such as sensor, mobile devices or other wireless devices to distributed computing for the purpose of resource-sharing. In this paper, we design and implement the mobile grid system in wireless lan network environment for the providing the grid service. Also, we evaluate the performance of mobile grid system using the processing the distributed applications in implemented mobile grid environments.

• Journal of KIISE:Computer Systems and Theory
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• v.27 no.1
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• pp.81-88
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• 2000

As distributed systems become used in wider area of applications, many works has been done to invent more efficient way to manage the distributed systems. The client-server based distributed system management by using SNMP or CMIP has many problems such as scalability, interoperability, flexibility, and so on. Recently, it is evident that managing distributed systems using mobile agents have popularity, and the Java language helps the trend. However, the improvement of performance has to be analyzed when the mechanism of mobile agent is applied In this paper, we discuss a more efficient way to make use of the mobile agent mechanism for managing distributed systems, and propose an Agent-On-Demand (AOD) method. The core of the method is not to use the previous method that mobile agents doing management job is dispatched to the managed nodes by a manager application, but to make agents requested by the managed nodes and then the manager application send the requested agents to that nodes. This process is done through Hierarchical State Threshold (HST). Also we present a performance model for Java RMI and mobile agent, and compare the AOD method with the previous work in terms of network overhead and execution time.

• Journal of Digital Contents Society
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• v.9 no.4
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• pp.533-541
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• 2008

In distributed mobile systems, the congestion control and disconnection problems are current major issues. This paper proposes a grouping-based fuzzy reference streaming method to improve the performance of systems supporting distributed mobile transactions. The proposed method resolves transaction requests issued by mobile clients using the GS interface. In the paper disconnection problems are resolved efficiently using transaction read and update for improved streaming service. Experimental results show that the proposed method outperforms the other existing methods significantly.

• Journal of the Korea Society of Computer and Information
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• v.8 no.4
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• pp.132-137
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• 2003

Due to the advances of the Internet technologies and web-based applications, the demand for wide distributed processing is increased. Mobile Agents have been proposed as a model to meet with the requirement for such environment. But current mobile agent system has the technical restriction. The requirement of mobile agent for the wide distributed processing is analysed in mobile agent system architecture, programming paradigm and technologies.

• International Journal of Computer Science & Network Security
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• v.21 no.3
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• pp.275-286
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• 2021

As a result of the vast amount of data that is geographically found in different locations. Distributed data mining (DDM) has taken a center stage in data mining. The use of mobile agents to enhance efficiency in DDM has gained the attention of industries, commerce and academia because it offers serious suggestions on how to solve inherent problems associated with DDM. In this paper, a novel DDM model has been proposed by using a mobile agent to enhance efficiency. The main idea behind the model is to use the Naive Bayes algorithm to give the mobile agent the ability to learn, compare, get and store the results on it from each server which has different datasets and we found that the accuracy increased roughly by 0.9% which is our main target.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2021.10a
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• pp.543-544
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• 2021

In this paper, we consider the visiting changing scheme in distributed regions. To the sensor networks of remote separated regions, the mobile sink visits each area by the determinated method. However, as the property of network environments, the mobile sink system visiting might be irregular, and its visiting area can be changed. Hence, in the sensor networks it is considered that the mobile sink visiting can be altered by the gathered data property.

• The KIPS Transactions:PartA
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• v.10A no.5
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• pp.439-452
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• 2003

Mobile agent is one of the good technologies for overcoming network load and latency in distributed applications, and it may be a promising way of base technology of distributed applications because of its high adaptability for various network environments. In this paper, a mobile agent programming system, called HUMAN, is designed and implemented efficient use in various distributed applications based on mobile agents. HUMAN supports such high level utilities as file searhing, addressing by groups of nodes, storing path information, storing search information, and thus it gives us high easiness in agent-based programming. And it provides various itinerary modes and flexible reply modes for easy adaptation to given network environment. It also provides a management server for registering and active agents. Thus it can be efficiently applied for such varous distributed applications as searching distributed information, remote control, and file sharing in networks. A simple electronic commerce system is designed is designed and implemented as a HUMAN based illustrative application.

• Proceedings of the IEEK Conference
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• 1998.10a
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• pp.491-494
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• 1998

This paper describes the design and implementation of file system which allows the collaborative computing in mobile environment. The design goal is to make a logically one file system in the distributed computer systems. The characteristics of frequent, foreseeable and variable disconnections in a mobile environment wrer taken into consideration. We introduce an auto-hoarding system that provides the availability of large number of nodes which are weakly and intermittently connected. The data consistency problems in distributed or replicated mobile data are also discussed.