• 대한조선학회논문집
• /
• 제40권6호
• /
• pp.69-79
• /
• 2003

Existing large-scale complex programs usually reside In a single computer, and the user has to be physically in contact with the computer. With the wide spread use of the internet, the need to carry out the design and analysis tasks geographically away from the main computer is increasing. In this paper existing Windows-based propeller design and analysis package is separated into the server-client modules and the protocol program is developed to implement the communication between multi-client computers and a single server computer. A new protocol packet is designed to use the Windows socket and the server/client programs control the receive/send operations using the information transmitted in the packet. Test runs show that the remote user, connected to the server computer through the internet only, can perform the required tasks.

• 한국정보과학회:학술대회논문집
• /
• 한국정보과학회 2004년도 봄 학술발표논문집 Vol.31 No.1 (A)
• /
• pp.808-810
• /
• 2004

유비쿼터스 컹퓨팅 환경에서 모바일 디바이스는 Service Controller의 역할을 수행한다. 그러나 모바일 디바이스를 이용하여 원격지 리소스에 접근하는 것은 제약이 따른다. Desktop에서 흔히 쓰이는 FTP와 같은 원격지 접속 기술은 모바일 디바이스에서는 사용 할 수 없다. 또 다른 방안으로 모바일 디바이스에서 Java Application을 이용하여 원격지 컴퓨터에 접속하는 방법이 있다. 그러나 이 또한 Java Security 문제를 해결해야 한다. 모바일 디바이스에서의 Java Security 문제는 그 응용 범위나 필요성에 비해 아직까지 구현 모델은 없다. 따라서 본 논문에서는 Desktop상에서 구현하는 Java Security 접근 방법 모델을 이용하여 모바일 디바이스에서 웹 브라우저를 통해 Java Application으로 원격지 컴퓨터에 접근하는 방법을 구현한다.

• 대한전자공학회:학술대회논문집
• /
• 대한전자공학회 2006년도 하계종합학술대회
• /
• pp.131-132
• /
• 2006

XML Web Services are a distributed computing component which enables users to use services existing in remote places by using a standardized language called XML. Web Services were developed as the cooperation and business scales between companies as businesses had been widened due to the improvement of internet services. For this reason, enterprise sized Web Services are mainly used at present. But as the number of Internet users has been increased, they became in need of more diverse services, and providing individual Web Services are also being more emphasized. Therefore, an Embedded Web Server for personal Web Services for embedded systems such as cell phones had been implemented in this paper. This paper shows the possibility of building up a small, personal sized Web Services Server not the enterprise sized one by doing real implementation.

• 한국정보처리학회:학술대회논문집
• /
• 한국정보처리학회 2002년도 춘계학술발표논문집 (상)
• /
• pp.385-388
• /
• 2002

그리드 컴퓨팅 환경을 이용하여 인터넷을 통해 프로세스를 원격에서 수행, 결과를 전달받을 수 있다. 기존의 프로세스 원격수행 모델은 다음과 같은 조건을 필요로 한다. 첫째, 해당 프로그램 또는 객체가 원격 컴퓨터에 존재하여야 하거나, 클라이언트와 서버관계를 설정하는 미들웨어가 요구된다. 둘째, 원격 프로그램 수행요청을 받아들이는 어플리케이션 또는 미들웨어가 미리 존재하여야 한다. 그러나 이와 같은 필요조건은 그리드 컴퓨팅 환경을 통해 계산자원을 동적으로 확장시키는데 사용되는 것을 제약한다. 본 논문에서는 이러한 필요조건 없이 원격 수행을 가능케 하는 프로세스 원격 수행 모델과 펑션 메시지를 활용하여 원격 계산자원을 동적으로 획득하는 방법을 제시한다.

• Journal of Communications and Networks
• /
• 제18권2호
• /
• pp.135-149
• /
• 2016

Cloud radio access network (C-RAN) refers to the virtualization of base station functionalities by means of cloud computing. This results in a novel cellular architecture in which low-cost wireless access points, known as radio units or remote radio heads, are centrally managed by a reconfigurable centralized "cloud", or central, unit. C-RAN allows operators to reduce the capital and operating expenses needed to deploy and maintain dense heterogeneous networks. This critical advantage, along with spectral efficiency, statistical multiplexing and load balancing gains, make C-RAN well positioned to be one of the key technologies in the development of 5G systems. In this paper, a succinct overview is presented regarding the state of the art on the research on C-RAN with emphasis on fronthaul compression, baseband processing, medium access control, resource allocation, system-level considerations and standardization efforts.

• 한국정보처리학회:학술대회논문집
• /
• 한국정보처리학회 2002년도 춘계학술발표논문집 (하)
• /
• pp.865-868
• /
• 2002

Computer Resource의 대용량화 및 인터넷 속도의 발달은 원거리에서 사용자가 인터넷을 통해 서버에 접속하여 컴퓨터를 사용하는 요구를 증가시켰다. 이는 Server-based 원격 컴퓨팅을 활용한 서비스의 연구 개발을 활성화 시켰으며, 최근 들어서는 Thin Client를 기반으로하는 중앙 집중형 원격 데스크탑 시스템(Remote Desktop System)을 꾸준히 발달시켰다. 그러나 단순한 파일 데이터의 접근에 대한 보안만을 제공하는 현재의 보안 체계는 이러한 Server-based 컴퓨팅 환경에서 다수의 사용자에 대한 복잡한 형태의 정보 공유 및 미세한 수준의 접근 권한이 요구되는 경우에는 적합하지 않다. 본 논문에서는 ASP(Application Service Provider) 컴퓨팅 시스템과 같은 중앙 집중형 원격 데스크탑 시스템에 적용하여 하나의 응용 프로그램에 대해 사용자별 세부적인 하위명령 사용 제한을 수행하는 사용자 명령 인증시스템을 제안한다.

• 대한원격탐사학회:학술대회논문집
• /
• 대한원격탐사학회 2003년도 Proceedings of ACRS 2003 ISRS
• /
• pp.600-602
• /
• 2003

In Korea, fire is the second frequent disaster. A total of 32,966 fires were happened in 2002, and injured 2,235 people and damaged 12 million dollars. So, we developed several components related to fire in order to decrease these victims and the amount of damage and have applied those components to Daegu Fire Agency. In this paper, we describe the developing system. It consists of 5 major components: mobile fire facility management component, web service component, fire management component, fire server, and fire application. They were developed in object-oriented computing environment, ATL/COM and Visual C++. So, they have some advantages such as high reusability, full interoperability, and easy understanding.

• 대한원격탐사학회:학술대회논문집
• /
• 대한원격탐사학회 2003년도 Proceedings of ACRS 2003 ISRS
• /
• pp.656-658
• /
• 2003

Recently, loosely-coupled systems are widely used for distributed computing environment. We develop a web GIS server who conforms to the international standards developed by the Open GIS Consortium (OGC), such as web feature service (WFS) implementation specification, Geography Markup Language (GML) implementation specification, and the simple features specification for OLE/COM. The web GIS server provides interoperable access of spatial data among data formats in the distributed environment.

• 대한원격탐사학회:학술대회논문집
• /
• 대한원격탐사학회 2003년도 Proceedings of ACRS 2003 ISRS
• /
• pp.631-633
• /
• 2003

Invisible networks have hidden bits flows from human being and become the periphery in the Internet overload; technologies become invisible and everywhere computing. The appearance of the calm environment requires a new relationship between human being and machines and geographic features: a paradigm shift. However no one says what next steps to those environments on details are, a reason why lots of people focus on the endeavors. In this paper, we touch the geographic features on ubiquitous environments and research the transition step of GIS mobile applications in order to achieve a natural integration of connectivity, capability and functionality.

• 대한전기학회:학술대회논문집
• /
• 대한전기학회 2003년도 학술회의 논문집 정보 및 제어부문 B
• /
• pp.701-704
• /
• 2003

The home network system of ubiquitous computing concept is changing present our home life as more comfortable and safe. Also, it permits that we can connect the home network system and control the appliance which is linked to the home network system without limitation in time and place. But, as other systems that use the public network like the Internet, remote control/monitoring of the home network system that use the Internet includes problems such as user's access which is not admitted and information changing. This paper presents the efficient solution about the security problem that is recognized to important problem of the home network system. Also this paper implements the security of the home network system based on the UPnP (Universal Plug and Play), adding VPN (Virtual Private Network) router that uses the IPsec to the home network system which is consisted of the ARM9 and the Embedded Linux.