• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.8 no.6
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• pp.55-61
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• 2008

In this paper, we proposed a multi-agent based healthcare system (MAHS) which is the combination of medical sensor module and wireless communication technology. This MAHS provides wide services to mobile telemedicine, patient monitoring, emergency management, doctor's diagnosis and prescription, patients and doctors, information exchange between hospital workers in a long distance. Also, MAHS is connected to Body Area Network (BAN) and a doctor and hospital workers. In addition, we designed and implemented extended JADE based MAHS that reduces hospital server's burden. Agents gather, integrate, and deliver the collected patient's information from sensor, and provide presentation in healthcare environment. Proposed MAHS has advantage that can handle urgent situation in the far away area from hospital like Islands through PDA and mobile device. In addition, by monitoring condition of patient (old man) in a real time base, it shortens time and expense and supports medical service efficiently.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2014.05a
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• pp.475-478
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• 2014

This paper proposed the position tracking and recognition method of workers and cars in construction field. The reason why the position of workers and cars has to be tracked is to prevent the safety accident, emergency rescue, and theft of building materials by unauthorized people and car, etc. To realize the tracking, it needs to adopt the Information Telecommunication technology to the construction field as an integrated support system. In this paper, we proposed the continuous positioning tracking algorithm for workers and moving cars using the selected wireless communication network. And we proposed the virtual gateway method to detect the entrance status of moving workers and cars. All of these proposed methods are evaluated in real construction field using the prototype of support system made by ourselves.

• The Journal of The Korea Institute of Intelligent Transport Systems
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• v.23 no.1
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• pp.61-81
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• 2024

eCall system assists traffic accident victims by connecting emergency rescue institutions with accurate accident information, helping them to identify the on-site situation in the event of a traffic accident. The purpose of this paper is to develop a Korean eCall system that reflects the requirements of domestic emergency rescue institutions and to analyze the expected effects through an integrated demonstration. The results of an integrated demonstration indicated that the communication success rate between the eCall IVS and the call center was 99.25%, and the average location information error was 1.2 m. In particular, it has been confirmed that the average location information error is less than 21.6 meters, as assessed by the Korea Communications Commission when evaluating the accuracy of domestic emergency rescue location information. When the eCall system was introduced, it was confirmed that the time from traffic accidents to hospital arrival could be shortened by 3 m 38 s for highways and 1 m 22 s for general roads. By it to traffic deaths from 2005 to 2022, it was analyzed that the number of fatalities decreased by 82,662, resulting in a reduction of approximately social costs.

• The Transactions of the Korea Information Processing Society
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• v.1 no.2
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• pp.244-253
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• 1994

Computer networks need a variety of services. Some services such as, video, voice and plantcontrol traffic require a real-time communication with explicit timing constraints. In this pater, we introduce a real-time communication technique which use a reservation technique on dualilnk networks. We introduce an enhanced technique that determines priorities of the message based on time constraints when real-time messages are transmitted. A simulation was conducted to compare and to analyze traditional technique. We used the SLAM II language to simulate this technique. Message loss rate were compared and analyzed as a performance criteria in this simulation.

• Journal of Digital Contents Society
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• v.9 no.1
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• pp.87-99
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• 2008

High Altitude Platform network systems utilize Unmanned Aerial Vehicle as routers for ground node communication. For this purpose, geographical clustering of ground nodes must be required. In this paper, we assume mobile ground nodes over wide area and the clusters composed of ground nodes are identified. UAVs can be positioned at the point of centroid of clusters. The number of UAVs are derived from the area size and the number of ground nodes deployed in that area. From the simulation and application of clustering algorithms, we showed visual clustering results with dynamic variance of number of ground nodes.

• Journal of Advanced Marine Engineering and Technology
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• v.39 no.9
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• pp.953-958
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• 2015

Raspberry Pi is a credit card-sized computer with support for a large number of input and output peripherals. This makes it the perfect platform for interaction with many different devices and for usage in a wide range of applications. When combined with Wi-Fi, it can communicate remotely, therefore increasing its suitability for the construction of wireless sensor nodes. In addition, data processing and decision-making can be based on artificial intelligence, what is performed in developed testbed on the example of monitoring and determining the confidence of fire. In this paper, we demonstrated the usage of Raspberry Pi as a sensor web node for fire-safety monitoring in a building. When the UV-flame sensors detect a flame as thin as that of a candle, the Raspberry Pi sends a push-message to notify the assigned smartphone of the on-site situation through the GCM server. A mobile app was developed to provide a real-time video streaming service in order to determine a false alarm. If an emergency occurs, one can immediately call for help.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.13 no.3
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• pp.537-545
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• 2009

Though there were many research and development about telemedicine on land recently, not yet applied to that on the shore. In this paper, when emergency clinic situation were generated in a ship on shore, the telemedicine system was designed and implemented for transfer and clinic service to doctors on the land by measuring basic body signals of patients. Presently, wireless communication and inmarsat telephone are usually used by simple questions and clinic consults to remote doctors when emergency situation were happened in the ship. In this paper, the telemedicine system on the shore were developed for improving this problems by measuring patient's fundamental conditions such as the blood pressure, pulse, the respiratory condition, electrocardiogram, body temperature, patient image and sending these information to remote doctors on land for more accurate prescription. The developed system can supply the high level clinic service to emergency patients on the shore and cope with the emergency situation in ship.

• Proceedings of the Korean Society of Broadcast Engineers Conference
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• 2011.07a
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• pp.143-147
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• 2011

3월11일 오후 2시46분경 일본 동북지역을 중심으로 M. 9.0 규모의 동일본대지진이 발생해 수많은 희생자가 나왔다. 지진발생 후 쓰나미가 일어나 방사선이 대량으로 유출되는 등 일본사상 최대의 국가적인 복합재난이 일어났다. 그럼에도 불구하고, 일본인들이 침착함을 잃지 않은 시민의식에 대해 세계 시민들은 극찬을 아끼지 않았다. 우리나라도 국가적으로는 대형 재난발생 시를 대비하여 행정안전부, 방송통신위원회, 소방방재청, 기상청, KBS, 재난전문가 등으로 구성된 가칭 "긴급재난방송협의회" 같은 것을 구성하여 긴밀하게 재난정보를 교환하는 유기적인 협력체제구성이 필요하다. 또, 나아가서는 이들 관련 부서에서는 재난방송 전담관을 두어 재난방송에 적극적으로 대처하여야 할 것으로 본다. 정부도 KBS에 대해 대폭적인 지원을 아끼지 않아야 하겠지만, KBS 또한 지금까지의 대응 자세에서 벗어나 "재난방송의 선진화"를 위해 재난방송시스템을 새로 구축해야 할 것이다. 마지막으로 KBS는 NHK의 지상파방송과 같이 KBS 위상에 걸 맞는 재난방송시스템을 구축하는 한편, 디지털시대에 있어서의 뉴 미디어를 이용하여 DMB나 스마트 폰, SNS 등을 이용한 각종 재난경보체제를 선도해야 할 재난주관방송사로서의 의무가 있다. 그것이 곧 공영방송의 본연의 임무이자 국민의 생명과 재산을 지키는데 최선을 다하는 길이다.

• Proceedings of the Korean Information Science Society Conference
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• 2006.10d
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• pp.59-63
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• 2006

이동 애드 혹 네트워크(Mobile Ad Hoc Network; MANET)는 인프라 없이 빠른 구성이 가능한 네트워크이다. 하지만, 긴급 상황과 같은 특수한 경우가 아닌 일상생활에서 사용 가능한 네트워크로 발전하기 위해서는 MANET과 인터넷의 연결이 꼭 필요하다. 인터넷 노드와 MANET 노드 간의 통신을 가능하게 만드는 것은 인터넷과 MANET을 중계하는 인터넷 게이트웨이를 통해서 이다. 고장 감내(fault tolerance)를 지원하고 대역폭을 늘리기 위해 다중 인터넷 게이트웨이들을 MANET에 배치하여 사용할 수 있다. 다중 게이트웨이들 간의 부하를 잘 분배한다면 네트워크 성능 향상을 얻을 수 있으므로, MANET 내에 여러 개의 인터넷 게이트웨이가 존재할 경우 이들 간의 부하 균등화는 중요한 이슈이다. 본 연구에서는 노드들의 이동이 빈번하고 인터넷 게이트웨이들이 고정되어 있는 MANET 환경에서의 부하 균등화 인터넷 게이트웨이 발견 기법들을 제안한다. 기존에 제안된 부하 균등화 기법들로 Shortest Path (SP), Minimum Load Index(MLI), Running Variance Metric (RVM) 기법들을 소개하고 각 기법들에 대한 시뮬레이션 결과를 제공한다. 시뮬레이션을 통해 이들 기법을 분석하여 문제점을 찾아내고 이를 수정 및 보완하여 새로운 기법들을 제안하며, 새로운 기법들의 성능이 기존 기법들에 비하여 향상되었음을 보인다.

• Journal of the Institute of Electronics Engineers of Korea CI
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• v.46 no.6
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• pp.63-69
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• 2009

The decentralized and open characteristic of the internet, along with the mobility and portability of mobile communication, and the interactivity of the internet and mobile communications all have been grafted to enable the creation of wireless internet in our lives, bringing about a lot of change. However, existing system management software solutions show limitations in time and space, as well as problems such as uncertain error messages, and also difficulty providing swift assistance or real time emergency support. Therefore, a wireless remote control system has been designed and implemented in this thesis, which is capable of managing and monitoring remote systems using mobile communication devices (Mobile Phone, PDA, Smart Phone, Webpad) for realtime control. The implemented real time wireless remote control system provides remote server management functions, error or event message functions, log record functions, authentication function via mobile devices and system performance evaluation function classified by client transaction.