• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2003.05a
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• pp.241-244
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• 2003

Recently, IETF Mobile IP WG focus on security problem issues in Mobile IPv6 and provide appropriate protocol to solve them. These include the protections of Binding Updates both to home agents and correspondent nodes, prefix discovery messages and transporting data packets. In Mobile IPv6, control traffics between home agents and mobile nodes uses IPsec to avoid that mobile nodes and correspondent nodes may be vulnerable to attacks. It is used, however, Return Routability procedure for correspondent node to assure that the right mobile node is sending the messages. In this paper, we propose method of IPser processing to protect messages between home agents and mobile nodes.

• Journal of information and communication convergence engineering
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• v.14 no.1
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• pp.9-13
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• 2016

With the introduction of the data-oriented plan for LTE service, one may concerned with the background of the ISP's policy in charging for LTE services. In this work we investigate the latest usage patterns of voice and data applications for customers over the current mobile network, via which we investigate why mobile operators introduced data-oriented plans. To be specific, we collected the real-field data for the volume of voice and data traffic from the LTE network before the data-oriented plans were introduced. From the collected data we compute the absolute volume as well as the proportion of voice and data applications. From these observations we infer mobile operators' reasoning behind the decision to introduce data-oriented plans with unlimited voice calls over the mobile network.

• Journal of Digital Convergence
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• v.4 no.2
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• pp.87-96
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• 2006

This study first tries to investigate factors that determine the quality of mobile game contents. Based on the information and information system-related studies, our research proposes to show the relationships among the quality of mobile game contents, the level of perceived easy of use and the perceived usefulness. Mobile game contents service providers can get insight on factors that should be considered to improve the quality of contents services. Also, the research findings provide a clue on the success of mobile game service.

• 한국디지털정책학회:학술대회논문집
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• 2006.06a
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• pp.409-417
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• 2006

This study first tries to investigate factors that determine the quality of mobile game contents. Base on the information and information system-related studies, our research proposes to show the relationship among the quality of mobile game contents, the level of perceived easy of use and the perceived usefulness. Mobile game contents service providers can get insight on factors that should be considered to improve the quality of contents services. Also, the research findings provide a clue on the success of mobile game service.

• Korean System Dynamics Review
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• v.2 no.2
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• pp.41-62
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• 2001

Perhaps, one of the typical emerging markets drawing tremendous attention from not only business professionals but also policy-makers would be the mobile Internet services. In recent years many research institutes reported their predictions on the growth of the mobile Internet services market, announcing that the market would show explosive growth and replace the wired Internet service market rapidly. Unfortunately, however, the reality we are facing at present is quite different from their expectations. The realized share of the mobile services in Korea last year has turned out remaining only about one percent of the total network service revenue. What are the reasons for the gap between the prospects and the reality? Starting from this question, this paper attempts to explore the generic pitfalls of the traditional number-crunching methods adopted thus far for the forecast of newly emerging market trends, and present an alternative by introducing systems thinking to the mobile Internet service market as an example, followed by its rationale as a new tool for forecasting and some reasoning about why traditional methods are no longer appropriate.

• Proceedings of the Korean Society for Quality Management Conference
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• 2004.04a
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• pp.31-37
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• 2004

This study analyzes strategy and main contents between each business market by mobile phone Number Portability. And, grasps what each mobile company customer satisfaction factors is effected on mobile phone Number Portability and estimates relative importance about the factors and understand counter strategies by these factors. Therefore, purpose of this study investigate weather the mobile phone Number Portability can specific function to promote competition in mobile Number Portability and present proper policy introduction direction examining factors to succeed

• 한국디지털정책학회:학술대회논문집
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• 2005.11a
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• pp.499-507
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• 2005

This study first tries to investigate factors that decide the quality of mobile contents with literature review from the previous studies. Second, we hope to establish and verify the research model, which shows the relationship among quality of mobile contents, the perceived usefulness, and the competent degree of expected value or not. Third, on the basis of research results, this study can suggest the advices and implications for activating mobile contents industry. Therefore, we believe that research results can provide basic guideline for measuring the quality of mobile contents. Also, mobile contents service providers who are preparing or on going can get the insight which factors should be considered to activate the quality of contents service.

• Journal of Information Technology Applications and Management
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• v.24 no.2
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• pp.81-96
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• 2017

Forecasting long-term mobile service demand is inevitable to establish an effective frequency management policy despite the lack of reliability of forecast results. The statistical forecasting method has limitations in analyzing how the forecasting result changes when the scenario for various drivers such as consumer usage pattern or market structure for mobile communication service is changed. In this study, we propose a dynamic model of the mobile communication service market using system dynamics technique and forecast the future demand for long-term mobile communication subscriber based on the dynamic model, and also experiment on the change pattern of subscriber demand under various scenarios.

• Journal of Digital Convergence
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• v.9 no.4
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• pp.131-141
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• 2011

This study empirically analyze the relationship of user's repurchase intentions directly and indirectly as combining user acceptance and flow experience on mobile content services. 360 users who experienced mobile contents are intended for this study, and results of this study expect to contribute a strategic approach to the mobile content application markets and to help the industries related to mobile contents understand the consumer behavior.

• International Journal of Computer Science & Network Security
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• v.21 no.4
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• pp.249-254
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• 2021

Our society is depending on mobile devices that play a major role in our lives. Utilizing these devices is possible due to their speed power and efficiency in performing basic as well as sophisticated operations that can be found in traditional computers like desktop workstations. The challenge with using mobile devices is that organizations are concerned with the interference between personal and corporate use due to Bring Your Own Device (BYOD) trend. This paper highlights the importance of mobile devices in our daily tasks and the associated risks involved with using these devices. Several technologies and countermeasures are reviewed in this paper to secure the mobile devices from different attempts of attacks. It is important to mention that this paper focuses on technical measures rather than considering different aspects of security measures as recommended by the cybersecurity community.