• KSII Transactions on Internet and Information Systems (TIIS)
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• v.8 no.11
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• pp.3916-3936
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• 2014

Smartphone applications like games, image processing, e-commerce and social networking are gaining exponential growth, with the ubiquity of cellular services. This demands increased computational power and storage from mobile devices with a sufficiently high bandwidth for mobile internet service. But mobile nodes are highly constrained in the processing and storage, along with the battery power, which further restrains their dependability. Adopting the unlimited storage and computing power offered by cloud servers, it is possible to overcome and turn these issues into a favorable opportunity for the growth of mobile cloud computing. As the mobile internet data traffic is predicted to grow at the rate of around 65 percent yearly, even advanced services like 3G and 4G for mobile communication will fail to accommodate such exponential growth of data. On the other hand, developers extend popular applications with high end graphics leading to smart phones, manufactured with multicore processors and graphics processing units making them unaffordable. Therefore, to address the need of resource constrained mobile nodes and bandwidth constrained cellular networks, the computations can be migrated to resourceful servers connected to cloud. The server now acts as a bridge that should enable the participating mobile nodes to offload their computations through Wi-Fi directly to the virtualized server. Our proposed model enables an on-demand service offloading with a decision support system that identifies the capabilities of the client's hardware and software resources in judging the requirements for offloading. Further, the node's location, context and security capabilities are estimated to facilitate adaptive migration.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.14 no.12
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• pp.2657-2662
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• 2010

Demand on information security in mobile devices based control system grows rapidly with a view to counteracting information hacking and leakage. Among these techniques, encryption and authentication are most common. This paper presents CBC-MAC (Cipher Block Chaining-Message Authentication Code) based mobile devices control system. The system is termed as Secure Mobile in Vehicle (SMIV)We use CBC-MAC that is one of the most efficient authentication modes to protect information against any malicious attacks. By sharing the secret key of CBC-MAC between the transmitter and receiver, it asserts authentic information. The proposed system is verified in such a way that we develop mobile devices control system, apply the CBC-MAC algorithm to the control system and validate the received data. Unlike conventional systems where the development of control mechanism in mobile devices based control systems is main concern, this proposed system offers a secure communication link of the data in mobile devices control system and therefore would be useful to the design and implementation of various mobile devices based control systems.

• Proceedings of the Korean Information Science Society Conference
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• 2001.10c
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• pp.358-360
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• 2001

In Integrated Services Internet the Resource Reservation Protocol (RSVP) provides a signaling mechanism for end to end QoS. In this paper, we propose a novel scheme using a Hierarchical Mobile Agents Tree (HMAT) based on the definition of new option called QoS Object Option (QOO) in order to improve the efficiency during handoff in Integrated Services Internet. Mobile agents are required to manage QOO, resource reservation and other mobility related basks un behalf of mobile hosts. This scheme is based on Mobile IPv6.

• Proceedings of the Korean Information Science Society Conference
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• 1999.10c
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• pp.679-681
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• 1999

인터넷과 이동통신의 연동결과 이동 노드(Mobile Node)의 이동성을 지원하지 않는 인터넷 프로토콜로 인하여 문제점들이 제기되었고, 이를 해결하고자 제안된 방법중의 하나가 Mobile IP이다. 그러나, 이 프로토콜도 이동 노드의 실시간 이동(즉, 데이터 통신중의 이동)은 지원하지 못하는 실정이다. 따라서, 본 논문은 실시간 이동이 가능하도록 이동통신망 상에서 Mobile IP를 효과적으로 지원하는 방법을 제안한다. 이동노드의 움직임을 추적하여 이동 방향을 예측하고 이동노드가 핸드오버를 수행하기 전에 선핸드오버(pre-handover) 처기 과정을 두어 문제점이었던 패킷의 손실과 전송시간의 지연을 줄이고자 한다.

• Proceedings of the Korean Information Science Society Conference
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• 2004.10c
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• pp.37-39
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• 2004

Mobile IPv6 기술은 단말의 이동성을 제공하는 기술로서 AII-IP기반의 차세대 유무선 통합 망 구축을 위한 핵심 기술이다. 기존의 소프트웨어 Mobile IPv6는 특정 OS에 의존적일 뿐 아니라, OS 구동 시 발생하는 오버 헤드로 인한 높은 전력 소모로 인해 시스템의 성능이 저하되는 문제점이 있다. 이에 본 논문에서는 기존 소프트웨어 기반 Mobile IPv6의 문제점을 해결하고 최신 표준에 따르는 이동성과 고속 통신을 제공하기 위한 하드웨어 Mobile IPv6를 설계 및 구현하였다. 그리고 구현된 모듈은 시험 망 패킷 데이터와 시뮬레이션을 통해 동작을 검증하였다.

• Journal of information and communication convergence engineering
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• v.5 no.3
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• pp.265-268
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• 2007

In previous papers [1] and [2], we proposed two improved methods protecting mobile users from active attacks[3,4] of network providers in mobile communication environment. But they were the case that mobile users were located in only home domain. In [5], we proposed protocol extending the method of [1] in case of roaming from the home domain to the remote domain. The purpose of this paper is to propose new mobile terminated protocol extending the method of [2] and analyze its security.

• Proceedings of the Korea Information Processing Society Conference
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• 2012.11a
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• pp.1344-1347
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• 2012

Mobile Cloud Computing services anywhere, anytime access to the Internet via a mobile terminal means to provide services, speakers are called Mobiloud. Computing processing power limitations of mobile devices, storage, due to space constraints, the tasks handled by mobile devices and data processing services to move to cloud environments. In recent years, smartphone, tablet PC and mobile device companies and individuals to spread and spread, and the content of the accelerating cloud painters, mobile cloud that can communicate with each other requires a standard service.

• Journal of the Korean BIBLIA Society for library and Information Science
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• v.17 no.1
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• pp.305-324
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• 2006

The requirements to use high speed internet under wireless environment are increased. To satisfy the requirements. the WiBro service combining high speed of wired internet service with mobility of wireless internet service will be launched as an alternative. This paper reviews and analyzes its overview, features, and comparison with existing mobile internet and wireless LAN in the information providing aspect. This paper also proposes how to adapt mobile information service and how to satisfy the requirements to construct mobile library based on the WiBro service. With the current problems in mobile-based information services provided by libraries. especially this paper proposes information service areas. considerations to provide information services, and service provisioning method based on the WiBro service.

• The Journal of Information Systems
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• v.13 no.1
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• pp.59-75
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• 2004

Fixed-mobile convergence services can be defined as the combination of previously separate fixed and mobile services, and networks and commercial practices. Examples of fixed-mobile convergence services include single voice-mail box, single number and unified messaging across fixed and mobile networks. Recently as more voice is transferred to mobile networks, convergence services between fixed and mobile become more important. In Korea convergence services are only starting to become established, and are likely to become an important part of any operator's offering. In this paper, we search the different levels of fixed-mobile convergence services and the trends and regulations for fixed-mobile convergence services in major countries. And at the same time, we also suggest the corresponding Marketing strategies by operators related to fixed-mobile convergence services.

• Proceedings of the Korean Information Science Society Conference
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• 2000.10c
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• pp.411-413
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• 2000

Internet망에서 mobile comupting에 대한 관심은 커져하고 있다. Mobile IP는 노드의 이동성을 지원하는 방법 중의 하나이다. 그렇지만 handoff 하는 과정에서 발생하는 패킷 손실 때문에 신뢰성의 문제가 발생한다. 게다가 mobile node(MN)와 foreign agent(FA)사이가 무선 링크인 경우 패킷 손실은 더욱 심각하다. TCP/IP는 고정된 네트워크에서 고안되어진 것이기 때문에 기존의 TCP/Mobile IP가 무선에는 부적합하다. 그러므로 본 논문에서 TCP/Mobile IP와 application사이에 midddleware로써 mobile agen(MA)를 사용하는 것을 제안했다. TCP mobile agent(TCP MA)을 여러 application에서 TCP 성능의 향상을 위해 제안했다. TCP MA는 FA와 MN를 위해 행동하고, 그리고 MN의 현재 위치에 상관없이 MN에 결과를 보낸다. 이러한 TCP MA는 handoff 동안에 발생하는 패킷 손실을 감소시킨다.