• Proceedings of the Korea Information Processing Society Conference
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• 2005.05a
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• pp.1381-1384
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• 2005

빠른 속도로 확산되고 있는 모바일 기기는 카메라, GPS, RFID 등과 같은 다양한 센서를 장착하고 Wi-Fi, WiMAX, WiBro 등의 무선 네트워크를 지원하는 형태로 발전하고 있다. 이러한 발전으로 사용자는 언제 어디서나 주변의 컴퓨팅 자원을 이용할 수 있게 되었고 모바일 기기의 서비스는 주변의 센서 또는 임베디드 컴퓨팅 장치로부터 수집되는 다양한 주변 환경 정보와 시스템 상태정보, 네트워크 상황정보 등의 디지털 정보를 이용하여 주변상황인식(context awareness)이 가능한 스마트 서비스로 발전하고 있다. 주변상황인식을 위하여 서비스는 주변에 존재하는 다양한 장치를 효율적으로 검색하고 이질적인(Heterogeneous) 장치와 정보의 표현 및 전송에 대한 호환성이 필요하다. 이러한 문제는 규격화된 프레임워크의 사용으로 해결할 수 있으며 상황정보의 관리 기능을 추가하여 서비스 개발의 생산성을 높일 수 있다 본 논문에서는 모바일 컴퓨팅 환경에서 상황정보의 제공과 사용에 적합한 프레임워크로서 MoCE(Mobile Context Exploerer) 아키텍처를 설계하였다. MoCE 는 상황정보의 수집, 변환, 분류, 통합 등의 기능을 제공하고 모바일 환경의 특성에 기인한 상황정보 발견 및 전송 프로토콜을 설계하여 사용하고 있다. 또한 Surround multiCam 서비스 예제를 구현하여 제안한 아키텍처의 안정성 및 성능을 실험하였다.

• The Journal of the Korea Contents Association
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• v.10 no.7
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• pp.1-9
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• 2010

This paper introduces a difference between mobile Augmented Reality (AR) authoring and desktop AR authoring, and suggests an interface system that can be applied to in-situ authoring of AR contents on a mobile device. The mobile devices have enabled users to use the AR system anytime and anywhere. It is now necessary to create user's individualized context information using mobile devices on the spot. To author AR contents easily with mobile devices, we need to maximize the convenience of mobile systems, which have yet limitation. To do so, this paper suggests new interaction approaches that manage augmented contents using visual cues and other simple attribute settings. In addition, to solve the problem that users have to hold their mobile devices to track markers while authoring contents, this system enables users to author contents in environment based on captured images. This interface system also can make cooperation environment for more than one users to author contents. This paper verifies the usefulness of the proposed interface by user tests. The results of an analyzing users' comments show that the proposed interface is suitable for in-situ mobile authoring system.

• The KIPS Transactions:PartC
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• v.12C no.2 s.98
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• pp.157-168
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• 2005

Group key agreement protocols are designed to provide a group of parties securely communicating over a public network with a session key. The mobile computing architecture is asymmetric in the sense of computational capabilities of participants. That is, the protocol participants consist of the stationary server(application servers) with sufficient computational Power and a cluster of mobile devices(clients) with limited computational resources. It is desirable to minimize the amount of computation performed by each group member in a group involving low-power mobile devices such as smart cards or personal digital assistants(PDAs). Furthermore we are required to update the group key with low computational costs when the members need to be excluded from the group or multiple new members need to be brought into an existing group. In this paper, we propose a dynamic group key protocol which offers computational efficiency to the clients with low-power mobile devices. We compare the total communicative and computational costs of our protocol with others and prove its suity against a passive adversary in the random oracle model.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2012.05a
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• pp.920-923
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• 2012

Recently, a Smartphone than a normal phone functions for computing ability, connectivity and communication is used as a handheld device, as used in the mobile social networking has been a breakthrough. This advanced Smartphone social networking and social life of the everyday of people living in communication found that many were affected. In this paper, the value of Smartphones and Smartphone users who use social networking to see how any of the benefits and the future of social networking between people on the impact of communications were analyzed.

• Smart Media Journal
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• v.2 no.1
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• pp.37-41
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• 2013

The Smart Use Interface Platform(SUIP) which is the next generation of smart phone's intelligent user interface platform researches, has a function of finding outer devices and has the dynamic loading function of the device driver. This paper introduce platform converter between smartphone and outer devices, named SUIP converter and it's applications, the SUIP converter can combines the smart phones which has Smart Use interface Platform and the Devices like sensor network devices which can be hardly connected to the smart phones.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.24 no.4
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• pp.536-545
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• 2020

When general statistical regression methods are applied to predict the battery remaining time of a mobile smart device, they yielded the poor accuracy of estimating battery remaining time as the deviations of battery usage time per battery level became larger. In order to improve the estimation accuracy of general statistical regression methods, a preprocessing task is required to refine the measured raw data with large deviations of battery usage time per battery level. In this paper, we propose a data preprocessing framework that preprocesses raw measured battery consumption data and converts them into refined battery consumption data. The numerical results obtained by experimenting the proposed data preprocessing framework confirmed that it yielded good performance in terms of accuracy of estimating battery remaining time under general statistical regression methods for given refined battery consumption data.

• Journal of the Korea Society of Computer and Information
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• v.19 no.10
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• pp.107-115
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• 2014

In recent years, large companies and public institutions in the Smartphone business purposes has been used a lot. Personal Smartphone are worried about security of personal information only. But if you are a corporate or business purposes requires a more cautious approach. It can destroy an organization's network to hack Smartphones have very serious damage. For this purpose, the existing solution, and try to solve security issues with MDM or MAM. However, Smartphone users discomfort and there is a limit of organizational control. In this paper, we can propose with these issues more broadly would like to suggest. Secure mobile traffic management system enables companies or agencies the ease for users to use a Smartphone. And, for organizations that provide smart phones are more powerful and can provide a means of control. In addition, wired/wireless integration and security measures that can provide new services to offer.

• The Journal of Society for e-Business Studies
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• v.17 no.3
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• pp.1-14
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• 2012

As the techniques of electronic and information are advancing, the computing power of a smart phone is becoming more powerful and the storage capacity of a smart phone is becoming larger. As the result, various new useful services are becoming available on smart phones. The context-aware service and mobile augmented reality have recently been the most popular research topics. For those newly developed services, identifying the object in the picture taken by the camera on the phone performs an extremely important role. So, many researches of identifying pictures have been published and most of them are based on the time consuming image recognition techniques. On the contrary, this paper introduces a very fast and effective method of identifying the objects on the photo making use of the sensor data obtained from the smart phone and electronic maps. Our method estimates the line of sight of the camera with the location and orientation information provided by the smart phone. Then it finds any element of the map which intersects the line of sight. By investigating those intersecting elements, our method identifies the objects on the photo.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2012.10a
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• pp.629-631
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• 2012

Android system has difficulty to expand the network as OS-based mobile systems fixed network hardware. Can be seen as essential to use this smart TV OS with Android OS for wireless network expansion. In this study, about the expansion of the limited hardware support for mobile Android OS WIFI module and USB-based external network devices, such as network research.

• Journal of the Korea Society of Computer and Information
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• v.19 no.4
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• pp.81-90
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• 2014

As mobile devices have become widely used and developed, PC based malwares can be moving towards mobile-based units. In particular, mobile Botnet reuses powerful malicious behavior of PC-based Botnet or add new malicious techniques. Different from existing PC-based Botnet detection schemes, mobile Botnet detection schemes are generally host-based. It is because mobile Botnet has various attack vectors and it is difficult to inspect all the attack vector at the same time. In this paper, to overcome limitations of host-based scheme, we compare two network-based schemes which detect mobile Botnet by applying HMM and SVM techniques. Through the verification analysis under real Botnet attacks, we present detection rates and detection properties of two schemes.