• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2010.05a
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• pp.80-83
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• 2010

As the recent development of mobile technology, users want to multi-service in anytime, anywhere, any terminal. To meet the needs of users, it causes a lot of expense that redesign of the entire network or expand the network of services areas. Therefore, IEEE, IETF is offering Handover technology between Heterogeneous Network. In this paper, the IEEE 802.21 MIH Information Server is based on the network. It proposes an improved Handover that L3 layer to optimize the Handover process use of FMIPv6 and executes simulation.

• 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.

• Journal of the Korea Convergence Society
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• v.10 no.7
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• pp.33-37
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• 2019

Nowadays, the needs for linking smart devices are growing fast because of wide spread of smart devices such as smart TV, smart phones, smart pad and so on. This paper presents a game framework for linking smart TV and smart phones and proves its applicability by developing an example contents. The problem of connection between smart devices is basically a problem of connection between heterogeneous devices. The problem is that data transmission and reception between heterogeneous devices must be considered. Therefore, the core data is implemented by adopting the concept of cloud computing and storing it in a server, and in a smart TV, playing the game by using this data. The proposed framework could be applied to a lot of applications such as computer games.

• The Journal of the Korea Contents Association
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• v.11 no.4
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• pp.83-91
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• 2011

The roadmap DB update for unknown roads is a very important factor for car navigation systems. In this paper, we propose a cloud computing based roadmap generation method for use between heterogeneous navigation system for unknown roads. While the drivers drive on unknown roads, the proposed method extracts the road attribute information, and then generates the metadata in an XML format that is available for the heterogeneous navigation systems in a cloud environment. The metadata is proposed to be used as a replacement for conventional proprietary roadmap formats which used by roadmap providers, which is efficient for heterogeneous navigation system providers in a cloud computing environment. Then, this metadata is provided to the roadmap DB providers through the cloud computing interfaces. With the proposed method, the roadmap DB providers update the own roadmap DB for navigation systems in real time. Therefore, the proposed method can reduce the costs of an actual traveling test and the maintenance for the roadmap DB provides. Thus, the cloud-oriented road map generation method can more efficiently update the unknown road information.

• Journal of Korea Spatial Information System Society
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• v.2 no.2 s.4
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• pp.49-58
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• 2000

With the growing realization that the GIS data management becomes important more than ever, a great deal of the spatial data is being digitalized through various GIS projects, such as NGIS project. However, the integrated search and analysis for GIS data are highly constrained by the databases being heterogeneous and distributed among organizations. This paper is to introduce the system developed to solve the problem of interoperability in the heterogeneous and distributed databases environment. The system architecture is presented which is composed of spatial data servers, nodes, and a gateway. Also, the paper provides the implementation details of the client application to access and analyze the distributed and heterogeneous spatial data with the standardized interface. Finally, based on the technical architecture, the korea spatial data infrastructure is explained.

• Annual Conference of KIPS
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• 2012.04a
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• pp.21-24
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• 2012

최근 인터넷의 발달과 함께 웹을 기반으로 하는 클라이언트-서버 분산 구조의 웹서비스 시스템 구조가 점차 확산되고 있다. 게다가, 최근에는 스마트폰을 이용한 스마트폰 애플리케이션이 대중화 되면서, 웹 서비스의 활용이 점차 확대되는 추세이다. 웹을 기반으로 클라이언트와 서버 사이에 통신을 하기 위해서는 원격 프로시저를 정의한 인터페이스가 규정되어야 하며, 기존에는 W3C에서 정의한 WSDL를 사용하여 웹서비스를 기술하곤 하였다. 그러나, 이와 같은 기존의 웹서비스 기술 및 사용방법은 그 구성이 복잡하고 오버헤드가 큰 이유로 널리 활용되지 못하였다. 최근에는 스마트폰이 대중화 되면서 REST 웹서비스의 활용이 확산되는 추세다. SOAP 기반 웹서비스에 대해서는 서비스 조합에 대해서 충분히 다루어 졌으며, 어느정도 정리된 연구분야이다. SOAP 웹서비스는 기계가 인식하기 쉽도록 엄격한 규약과 인터페이스를 정의한 것이기 때문이다. 반면, REST 웹서비스는 최근 이기종(heterogeneous) 시스템 통합 및 스마트폰에서 서버 측 데이터를 접근하는 가장 유리하고 편리한 방법이다. 따라서, 그 활용방법에 대하여 많은 수요가 발생하고 있으나, 일반적으로 잘 소개되어 있지 않으므로 본 논문에서 REST Web Service Open API의 스마트폰 애플리케이션 개발의 활용방법을 소개한다.

• Journal of KIISE:Software and Applications
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• v.32 no.12
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• pp.1238-1246
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• 2005

This thesis is written with web security module for safe data transmission between heterogeneous systems(ex. OS). Web system has allowed users to have great convenience and a lot of information. Though web service business has been progressed much, because of the limitation of it's own system, lots of loss, derived from data spillage which is the weakest point of security, has also followed. Suggested security module is realized by two module. One for server security module for web server, the other is client security module for client. The security structure, suggested on this thesis guarantee safe data transmission by only simple installation of modules in clients and servers. for speed sensitive transmission between web server and browser, Triple-DES, symmetric encryption system suitable for fast encryption communication, is adapted. To solve problems caused from key management, Diffie-Hellman's key exchange algorithm is adapted. By this method, all symmetric encryption troubles from key distribution and management, speed could be work out a solution. And Diffie-Hellman type algorithm secures Authentication for safe data Protection.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.14 no.11
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• pp.2451-2456
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• 2010

As the recent development of mobile technology, users want to multi-service in anytime, anywhere, any terminal. To meet the needs of users, it causes a lot of expense that redesign of the entire network or expand the network of services areas. Therefore, IEEE, IETF is offering Handover technology between heterogeneous network. In this paper, the IEEE 802.21 MIH information server is based on the network. It proposes an improved handover that L3 layer to optimize the handover process use of FMIPv6 and executes simulation.

• Annual Conference of KIPS
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• 2004.11a
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• pp.571-574
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• 2004

디지털화 된 멀티미디어 데이터가 증가함에 따라 데이터의 효과적인 분류 및 검색 작업이 더욱 중요해 지고 있으며, 네트워크와 하드웨어의 발전으로 영상 정보를 검색함에 있어 기존의 웹상의 클라이언트/서버 기반 검색만으로는 부족하게 되었다. 이에 따라 영상 정보를 웹상에서 뿐만 아니라 모바일 같은 이기종간의 검색이 필요하다. 그러나 이기종 간의 플랫폼에서 동일한 정보를 얻기 위해서는 상호운용성에 문제가 있다. 웹 서비스(Web Service)는 분산 애플리케이션에 대한 언어-중립적(language-neutral)과 벤더-중립적(vendor-neutral)[5]을 제시하고 있어 기존의 서로 다른 플랫폼간의 정보 이전 문제를 해결할 수 있다. 따라서 본 논문에서는 영화 컨텐츠 검색 시스템을 웹 서비스화 하였다.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.22 no.3
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• pp.391-398
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• 2018

There are many problems caused by data sharing between general heterogeneous digital devices due to various interfaces. To solve this problem, this paper proposes heterogeneous data sharing with cloud service and mobile through D2D communication that supports communication between different devices. The proposed technique is used to reduce the load on the server to perform data synchronization. Also, in order to minimize data latency caused by data replication between different devices, a technique to enhance the speed of data writing with copying only the modified parts in the chunk list is adopted and cloud service model integrated with mobile environment is realized in order to minimize the network bandwidth consumed for synchronization for data sharing. Therefore, it is possible to share data in different spaces efficiently with maintaining data integrity and minimizing latency in data.