• Journal of the Korea Institute of Information and Communication Engineering
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• v.8 no.8
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• pp.1670-1678
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• 2004

Currently, Price comparison sites receive inputs of product information and price manually after being joined by releted shopping mall companies, and can't support automatically price fluctuation of products in real time. Therefore, this paper designs and implements web service system based on SOAP for interactive product order and price comparison dynamically using web service technologies in real time. This web service system composes web service client module including functions of product search, sort and order, and server module including functions of remote procedure call for product search and order. This web service system implements interchanging product information based on SOAP messages and can support independence of platform and flexible potability in environment conforming to SOAP, WSDL and UDDI standards.

• Proceedings of the Korea Information Processing Society Conference
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• 2017.04a
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• pp.336-339
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• 2017

스마트폰 서드 파티 애플리케이션에 대한 포렌식 분석은 최근 수 년 간 탐구되어야 할 새로운 영역으로 떠올랐다. 현재 스마트폰 시장은 그 규모를 측정하는 것이 무의미할 만큼 커졌으며 각 스마트폰 플랫폼의 앱(App)마켓에는 셀 수 없이 많은 서드 파티 애플리케이션이 존재한다. 모바일 포렌식 소프트웨어 도구들은 일반적으로 연락처, 문자메시지, 통화기록 등의 전형적인 데이터를 수집한다. 이러한 도구들은 서드 파티 애플리케이션이 기기 내부에 저장하는 정보들을 간과하기 쉽다. 여러 제조사 중, 애플사의 모바일 기기에 설치된 많은 서드 파티 애플리케이션은 수사에 도움이 되는 많은 정보와 관련있는 디지털 증거를 남긴다. 이런 잠재적 증거들은 기기 내부에 저장되기도 하며, 비교적 손쉬운 방법으로 법정에 제출 가능하다. 스마트폰으로 이루어지는 많은 활동은 상당 부분 서드 파티 애플리케이션으로 이루어지며, 사이버 범죄 사건의 중심에 스마트폰이 있다면 서드 파티 애플리케이션 분석을 통한 핵심 증거 획득이 사건을 해결할 가능성이 높아진다. 본 논문에서는 스마트폰에서 널리 쓰이고 있는 소셜네트워크 애플리케이션인 '인스타그램(Instagram)'에서 행해진 포렌식 분석에 초점을 맞추고, 기기는 전 세계 적으로 가장 사용자 점유율이 높은 스마트폰인 아이폰에서 이루어졌다.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.19 no.5
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• pp.1163-1172
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• 2015

In this paper, an MQTT based protocol is designed and implemented for control, management and monitoring of HVAC in a cloud platform in real time. The MQTT protocol is a two-way messaging protocol, and has the generality, flexibility, light weighted, quickness with reliability and security. In the implemented system, performance and reliability of the communication protocol is considered for data acquisition and control between the CCU and the cloud server. Control and monitoring for the cloud server is performed in real time in conjunction with CCU and the MQTT server.

• The Journal of the Korea institute of electronic communication sciences
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• v.11 no.5
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• pp.499-504
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• 2016

The Service had a purpose to be heard through the Smart Phone APP and Smart TV Broadcasting Contents to Foreigner's Language in The Asia Culture Center. This Paper explained how to realize foreigner with Beacon's Signal and IoT gateway provided the voice service with selected his language using AllJoyn Protocol Interface function. IoT Service Platform received the Registration of foreigner's identifier, there sent messages to all devices, which were all IoT gateways, IoT gateway could connect to foreigner's Smart Phone App and heard the Broadcasting contents. If a foreigner went out of Beacon's management distance, the voice App service were released.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.15 no.3
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• pp.1691-1699
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• 2014

IEEE developing WAVE specifications are able to support V2V and V2I wireless communications, and these functionalities can be used to enhance vehicle operational safety. To overcome any security weaknesses that are inherent in wireless communications, WAVE specification should support message encryption and authentication functions. In this study, we have implemented WAVE security algorithms in IEEE P1609.2 with openssl library and C language. We have verified the normal operation of implemented software, using the test vectors of related specifications, and measured their performance. Our software is platform independent, and can be used for the full implementation of WAVE specification.

• Proceedings of the Korea Information Processing Society Conference
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• 2005.11a
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• pp.1223-1226
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• 2005

유비쿼터스 컴퓨팅 환경의 인프라는 센서, 미들웨어, 그리고 응용 프로그램으로 구성된다. 유비쿼터스 컴퓨팅 환경이 실현되기 위해서는 이 세 요소들이 상호 유기적으로 메시지를 전달해야 하며, 구성 요소를 구성하는 개체들에 대해서 존재 유무를 파악할 수 있어야 한다. 우리는 센서와 미들웨어간의 통신을 위한 컴포넌트를 쉽게 만들기 위하여 망 관리에서 사용되었던 SNMP 를 이용하였다. 하지만 SNMP 를 적용한 구조에서는 동적으로 변화는 센서에서 무방비한 입장이었다. 다시 말해서 동적으로 변하는 센서나 혹은 그 속성값들이 변할 때, 그 시스템의 전문가가 직접 통신 컴포넌트를 수정해야 했다. 또한 센서들이 접하게 될 플랫폼들이 여러 종류가 있기 때문에 센서를 만드는 벤더들 또한 여러 버전의 API 를 제공해야 한다. 따라서 본 아키텍처는 센서나 그 속성값들이 변할 때 사람에 의해서 조작하지 않고 시스템 스스로 설정하며 그 센서들을 사용할 수 있도록 하고, 벤더들의 수고를 덜어 줄 수 있는 아키텍처를 제안한다. 이러한 메커니즘은 기존 망 관리에서 사용했던 AgentX 에서 착안하였다. AgentX 프로토콜의 메커니즘을 이용함으로써 사용자의 입장에서 센서에 대한 Transparency 를 보장 받을 수 있으며, 부수적으로 센서를 만드는 벤더들은 여러 버전의 API를 만들어야 할 수고를 덜게 되었다.

• The Journal of the Korea Contents Association
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• v.8 no.8
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• pp.28-36
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• 2008

The worth of frequency resources is growing up because of development of wireless communication. However, frequency resources is short, because demand is much more than supply. So it needs Cognitive Radio(CR), which manages frequency resources efficiently. In this paper, we apply the efficient Spectrum Sensing method based on CR in an embedded board. We examine various Spectrum Sensing methods and apply these methods to an embedded platform on CR environment and verify the performance through the MAC message.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.18 no.8
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• pp.1955-1960
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• 2014

Many routing protocols have been proposed for low-power and ad-hoc networks to deliver command or data among nodes and recently, various researches are carried out about networking scheme considering reliability and scalability. In low-power networking technology, the performance of network layer is closely connected with the operation of data link layer and mesh routing mechanisms based on TDMA MAC are considered for reliability and scalability. This paper proposes mesh routing algorithm utilizing the characteristics of TDMA MAC and topological addressing in TDMA based low-power and ad-hoc networks and implementation results are presented.

• Journal of KIISE:Computing Practices and Letters
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• v.5 no.6
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• pp.793-800
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• 1999

TMN Agent Platform은 망 요소의 운영상태와 자원들을 GDMO에 따라 관리객체(Managed Object : MO)로 모델링 하고, 자원들의 현재 상태를 유지하며, 관리자(Manager)로부터의 망 관리 기능 요구에 따라 조작된다. 그러므로, 에이전트의 성능향상은 전체적인 통신망 관리의 성능향상에 직접적인 영향을 미친다.본 논문에서는 TMN 에이전트의 기능요구 사항을 분석하고, 이를 토대로 성능향상을 위해 멀티스레드 기법을 사용하는 병렬 처리 구조의 TMN Agent Platform의 기능구조를 제시한다. 또한 에이전트와 다양한 자원들간의 효율적인 메시지전달을 위한 체계를 제시하며, 구현된 TMN Agent Platform의 성능을 분석한다.Abstract TMN Agent manages the operational status and real-resources of network elements, such as switching nodes and transmission systems. It performs the requested management functions from manager and maintains consistent status data of real-resource. The performance of agent system affects directly the performance of network management operation. If the agent is implemented by sequential processing scheme with single process, the agent processing can be delayed or blocked according to the status of real-resources. This problem can be solved by parallel and distributed processing scheme.To improve the processing performance of TMN Agent, we propose a TMN Agent Platform's functional architecture that is based on parallel processing with multi-tread and effective message transferring scheme between agent and various real-resource. We analyze the performance of the implemented TMN Agent Platform.

• Journal of Platform Technology
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• v.9 no.3
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• pp.24-35
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• 2021

High-speed military aircraft shall be able to identify and resolve enemy threats or internal component defects with survival equipment and warning systems to minimize casualties. Warning system is divided into visual method with symbolic display and auditory method with communication equipment, which is superior in that they it has a short response time and does not cause pilot confusion by listening to simple messages. Thus, this paper suggested and evaluated effective design methods of voice/tone warning systems for military aircraft based on a life cycle perspective. Since military aircraft is safety-sensitive, priorities and three properties(Inhibitible, Interruptible, and Deactivatable) were applied to each warning to reflect criticality and urgency. As a result, we confirmed that it took 40ms to play the voice warnings, satisfying all requirements through V model-based development and testing, and improving product reliability.