• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.11 no.5
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• pp.73-79
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• 2011

With increasing use of smartphone, users require a new message service to prevent security attack and provide integrated messages. Since smartphone uses data services such as 3G cell network and WiFi, it can provide reliable message transfer through various security policies. In addition, it can transfer various data collected using built-in camera and GPS. This paper proposes a smart message service platform which can provide security services such as authentication, confidentiality and integrity as well as transfer the integrated message including location, picture and text. To verity the functionality of the platform, this paper implements an iPhone app and message transfer server, and then shows the implementation results.

• Proceedings of the Korean Information Science Society Conference
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• 2012.06a
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• pp.60-62
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• 2012

차량 전장용 임베디드 소프트웨어 플랫폼의 공개 표준인 AUTOSAR SW 플랫폼에서의 CAN에서는 송신단말에서 전달하려는 메시지가 큰 경우에는 메시지를 여러 개의 프레임들로 쪼개어 전송을 하고, 수신 단말은 쪼개진 프레임들을 하나의 메시지로 재조립한다. 이 때에 전송 오류가 발생하여, 수신 단말에 프레임이 전송되지 못할 수 있으며, AUTOSAR SW 플랫폼에서 규정하고 있는 기존의 CAN 모듈들은 이와 같은 전송 오류를 처리할 수 있는 기술인 재전송 기술이 규정되어 있지 않다. 본 논문은 AUTOSAR SW 플랫폼 기반의 CAN 통신에서 발생할 수 있는 메시지 전송 오류시에 메시지 재전송 방법에 관한 것이다. 본 논문에서는 전송오류가 발생한 프레임만을 다시 전송하여, 재전송이 효율적으로 이루어지도록 하였다.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.12 no.2
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• pp.19-27
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• 2012

Although message services in mobile environments provide real-time transfer of various contents such as text, multimedia and location, they can't provide dynamic message services based on analysis of message contents. This paper proposes "message as a service" concept and presents the design methodology for a message platform. The message in this paper is composed of the data part and template part which is in charge of view and functional logic of contents. In addition, two parts of a message are transferred separately. If a terminal device stores message templates, message platform can transfer data part only and thus network traffic can be reduced. Besides an efficient network utilization, we can dynamically update message view and its functional logic by modifying templates.

• The Journal of the Korea Contents Association
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• v.19 no.4
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• pp.174-186
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• 2019

Twitter is very popluar with users who desire social interaction as it is a highly effective method of communicating compared to traditional communication platforms; and thus has garnered considerable interest from the academic community. This research reveals how election results can be predicted by the factors of total volume of messages, positive messages and negative messages tweeted about a candidate. Social matrix analysis revealed that the quantity of twitter messages was a strong predictor of election results in the 18th presidential election in Korea. In addition, more positive messages than negative messages about a candidate from twitter users recorded better results in the election. This research found that the total quantity of messages, positive messages, and negative messages as key factors for predicting election result. Future studies should investigate other SNS platforms to discover what is the most effective communication strategy on each platform.

• Journal of KIISE:Computing Practices and Letters
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• v.15 no.10
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• pp.724-739
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• 2009

This paper suggests the energy-efficient message delivery scheme and the software platform which exploits the multiple network interfaces of the mobile terminals and GPS in the current mobile devices. The mobile terminals determine the delivery method among 'direct', 'indirect', and 'WAN' based on the position information of itself and other terminals. 'Direct' method sends a message directly to the target terminal using local RAT. 'Indirect' method extends the service area by exploiting intermediate terminals as relay node. If the target terminal is too far to reach through 'direct' or 'indirect' method, the message is sent using wireless WAN technology. Our proposed scheme exploits the position information and, thus, power consumption is drastically reduced in determining handover time and direction. Network simulation results show that our proposed delivery scheme improves the message transfer efficiency and the handover detection latency. We implemented a message platform in a smart phone realizing the proposed delivery scheme. We compared our platform with other typical message platforms from energy efficiency aspect by observing the real power consumption and applying the mathematical modeling. The comparison results show that our platform requires significantly less power.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.8 no.5
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• pp.149-157
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• 2008

In this paper, a POI(Point-of-Interest) telematics service platform, in which detailed POI telematics services are discovered automatically and provided, is developed. The platform discovers services with UPnP middleware and provides a location-based service using GIS information. It is implemented by a telematics server, terminals, and service gateways and tested by applying test scenario for validation. Also, the response time and throughput of UPnP messages in the platform is measured and analyzed. The result shows that it has little impact on the service network congestion.

• Journal of KIISE:Computing Practices and Letters
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• v.15 no.1
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• pp.29-37
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• 2009

Recently, message based data transmission plays an important role in modem computing systems. Especially JMS(Java Message Service) is one of the most popular messaging platform. However, because of its characteristics for maintaining reliability, if we want to use it for transmission of large scale messages in a distributed Internet environment by using a WAN connection which may not be robust enough, we need to employ a different method to minimize total transmission time of messages. We found the fact that the total time of message transmission heavily depends on size of a message. In order to achieve the ideal size of a message, we develope a novel mechanism and a system which finds the ideal size of a message and automatical1y control JMS applications for minimizing transmission time. Finally, we test the proposed mechanism and system using real-data in order to prove advantages and compared with the naive mechanism. As a conclusion, we showed that our proposed mechanism and system provide an effective way to reduce transmission time of large scale messages in distributed environment.

• Proceedings of the Korean Information Science Society Conference
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• 2012.06d
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• pp.52-54
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• 2012

수년 전부터 환자와 병원 간 의료정보 교환의 표준에 관한 연구가 국내외에서 꾸준히 진행되고 있으며, 앞으로도 활발한 연구가 진행되어 많은 산출물들이 도출될 것이다. 현재 대부분의 연구에서는 병원정보시스템(HIS)을 기반으로 병원 내 의료 장비들 간의 메시지 표준화를 위한 것으로 환자와 병원 간 정보 교환을 위해 스마트 기기, Open Service Gateway Initiative(OSGi) 플랫폼 등에서 오픈소스를 이용한 HL7 메시지 교환 시스템을 구성하는 연구는 아직 미비한 실정이다. 본 논문에서는 Open eHealth Integration Platform(IPF)을 이용해 안드로이드와 OSGi 플랫폼에서 환자와 병원 간의 HL7(Health Level Seven) 메시지의 교환, 검증 그리고 모니터링 위한 시스템을 구현하였다.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2021.11a
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• pp.31-33
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• 2021

현재 진행 중인 '스마트 항로표지 현장시설 고도화 연구'는 '확장이 용이한 다목적 플랫폼 설계', '스마트 항로표지용 최적 통신장치 개발' 등이 포함되어 있다. 이 중 AIS-ASM은 AIS를 기반으로 특정 응용에 특화된 메시지를 보낼 수 있는 수단이며, ASM에 대한 활용 가능성이 증대됨에 따라, ITU-R M.2092-0에서는 두 개의 AIS 채널과는 별도로, 두 개의 ASM 채널을 새로 할당하였다. IALA-AISM에서는 각국의 ASM 메시지를 수집하여 제공하고 있는데, 본 논문에서는 이들을 분석하여 현재 운용하고 있는 항로표지 관련 메시지를 살펴보고, 향후 스마트 항로표지에서 활용 가능할 것으로 기대되는 메시지들을 정리한다.

• The Transactions of the Korea Information Processing Society
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• v.5 no.5
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• pp.1320-1332
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• 1998

We propose Multiph which is a virtual topology for a reliable group communication platform on dynamic high speed network. We also define group communication primitives for transmission of messages and group management. Multiph consists of a set of nodes which are process groups and a set of edges which are the connection between nodes providing the route of messages. Processes can send and receive messages overlapped in a several multicast groups. Overlapped process organizes non-overlapped logical group, which called meta-group. Multiph guarantees ordering of messages that received at the destination group. It has no extra node that decreases system performance. Although the group has dynamic group change to leave and add process, it does not reconstruct the existing platform structure.