• Journal of the Korean Society of Marine Environment & Safety
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• v.24 no.7
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• pp.960-966
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• 2018

Communication antennas used at sea have been developed remarkably. However, the speed of this development is insufficient when compared with user demands. Therefore, we developed an antenna for UWB/Bluetooth that operates on 3 [GHz] and 5.72 [GHz] bands in order to use the high-speed communication network system which improved antenna miniaturization, gain and radiation patterns. To improve bandwidth, a microstrip patch antenna was selected and CST Microwave Studio 2014 program was used. Through the program, we calculated the slot width, length, transmission line width, etc. using a theoretical formula at each step. These figures were checked through simulation to see if they meet production standards. UWB for high-speed wireless communication for short-range communication at sea, Bluetooth for exchanging information at a short distance by connecting each device, and corresponding technology can be easily utilized.

• Journal of the Korea Society of Computer and Information
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• v.29 no.1
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• pp.111-119
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• 2024

In this paper, we propose a big data platform that can collect information from various sources collected at ocean. Currently operating ocean-related big data platforms are focused on storing and sharing created data, and each data provider is responsible for data collection and preprocessing. There are high costs and inefficiencies in collecting and integrating data in a marine environment using communication networks that are poor compared to those on land, making it difficult to implement related infrastructure. In particular, in fields that require real-time data collection and analysis, such as weather information, radar and sensor data, a number of issues must be considered compared to land-based systems, such as data security, characteristics of organizations and ships, and data collection costs, in addition to communication network issues. First, this paper defines these problems and presents solutions. In order to design a big data platform that reflects this, we first propose a data source, hierarchical MEC, and data flow structure, and then present an overall platform structure that integrates them all.

• Journal of the Korean Society of Marine Environment & Safety
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• v.29 no.7
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• pp.902-909
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• 2023

This study evaluated the performance test of a small-sized LTE-Maritime(LTE-M) transceiver that was developed and promoted to expand the use of intelligent maritime traf ic information services led by the Ministry of Oceans and Fisheries with the aim of supporting the prevention of maritime accidents. Accoriding to statistics, approximately 30% of all marine accidents in Korean water occur with ships weighing less than 3 tons. Therefore, the blind spots of maritime safety must be supplemented through the development of small-sized transceivers. The small transceiver may be used in fishing boats that are active near coastal waters and in water leisure equipment near the coastline. Therefore, verifying whether sufficient performance and stable communication quality are provided is necessary, considering the environment of their real usage. In this study, we reviewed the communication quality goals of the LTE-M network and the performance requirements of small-sized transceivers suggested by the Ministry of Oceans and Fisheries, and proposed a test plan to appropriately evaluate the performance of small-sized transceivers. The validity of the proposed test method was verified for six real-sea areas with a high frequency of marine accidents. Consequently, the downlink and uplink transmission speeds of the small-sized LTE-M transceiver showed performances of 9 Mbps or more and 3 Mbps or more, respectively. In addition, using the coverage analysis system, coverage of more than 95% and 100% were confirmed in the intensive management zone (0-30 km) and interesting zone (30-50 km), respectively. The performance evaluation method and test results proposed in this paper are expected to be used as reference materials for verifying the performance of transceivers, contributing to the spread of government-promoted e-navigation services and small-sized transceivers.

• Journal of Korea Multimedia Society
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• v.13 no.1
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• pp.122-132
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• 2010

The analysis of ocean environment offers us essential information for ocean exploration. But ocean environment has a lot of environmental variables such as the movements of nodes by an ocean current, corrosion by salt water, attenuation of radio wave, occurrences of multi-path and difficulty of sensor nodes' deployment. It is accordingly difficult and complex to gather and process the environmental information through ocean data communication due to these constraints of ocean environment unlike the terrestrial wireless networks. To overcome these problems, we organized ocean communication network for monitoring underwater environment by real experiment in Gyeongpoho similar to ocean environment. Therefore, this paper aims at overcoming major obstacles in ocean environment, effectively deploying sensor nodes for ocean environment monitoring and defining an efficient structure suitable for communication environment by the implementation of ocean environment monitoring system in Gyeongpoho.

• Journal of the Korean Society of Marine Environment & Safety
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• v.24 no.6
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• pp.679-685
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• 2018

In order to reduce marine accidents using advanced information and communication technology, various research and development projects are conducted globally on e-Navigation related technologies and services. Existing studies do not provide policy measures for LTE-M. In order for these technologies and services to be installed on vessels and to contribute to the prevention of accidents at sea, the law should be expand operational organizations and systems. In particular, communication equipment and related technical standards should be prepared, and its digital communication technology (LTE-M, VDES, Digital-MF / HF, etc.) In this study, we conducted short, medium, and long term performance assessment of the identification system and the policy for effective implementation of Korean e-Navigation. We presented a visible plan of the relevant policy. For example, e-Navigation core services, e-Navigation communication networks and operating systems, e-Navigation international standard leading technologies and e-navigation services activated in the field. To do this, we conducted research based on the progress data of the Korean e-Navigation project, which was led by the Ministry of Maritime Affairs and Fisheries, and conducted research discussions with practitioners and experts in related fields. As a result of this study, it is expected that the proposed policies will contribute to the reduction of marine accidents, the promotion of the maritime industry and the development of additional government policies for national security.

• Current Industrial and Technological Trends in Aerospace
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• v.4 no.1
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• pp.74-82
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• 2006

정지궤도 상에서 기상 관측 임무를 수행하고 있는 주요 기상위성의 관측 데이터의 전송 및 분배 시스템의 구성 현황 및 주요 전송 파라미터를 분석하고 현재 개발되고 있는 통신해양기상위성의 관측 데이터 전송 시스템 구성 및 채널별 주요 전송 파라미터를 제시한다. 제한된 기상 주파수 전송 대역에 대해 갈수록 고성능화 되어가는 기상 센서에 따른 대용량 기상관측 데이터 전송 및 분배를 위한 전송 방법 및 주파수 대역의 변경, 지상망 및 상업용 위성 통신망의 활용방안을 살펴본다.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2022.06a
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• pp.304-305
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• 2022

Recently, as digital communication technology is widely applied to the maritime field, large amounts of maritime data are being accumulated. Accordingly, attempts to create new value by applying data science and Artificial Intelligence(AI) technologies are emerging. Typically, Ministry of Oceans and Fisheries has been providing korean e-Navigation service since 2021 based on LTE-Maritime communication network, as well as R&D for creating value-added service through analyzing huge-sized maritime traffic data is underway. By the way, to do any data-based research, legal system, as a research infra, that researchers can get the data whenever they need is essential. This paper looked at types of data in maritime fields, checked related legal system about scientific analysis and utilization. It is confirmed that there are some legal factors which restrict its scientific analysis and utilization, and suggested ways of improvement to boost R&D using maritime data as a conclusion.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2011.11a
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• pp.164-165
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• 2011

스마트폰 기술이 항만물류 산업에도 혁신적 변화를 일으키고 있다. 2010년 국토해양부는 '유무선 통합 Smart-Port' 정책을 발표하고 스마트폰과 Wibro, 3G, Wifi 등 통신망을 이용한 항만물류서비스를 통하여 항만자동화와 효율성 제고를 꾀하겠다는 계획을 발표하고 실행에 박차를 가하고 있다. 국내 항만물류 분야에서는 국토해양부의 정책에 발맞추어 다양한 형태의 항만물류 모바일 서비스를 제공하고 있다. 본 연구에서는 국내 항만물류 분야에서 도입, 사용되고 있는 스마트폰을 이용한 모바일 애플리케이션 사례를 분석하고, 활성화방안을 제시하였다.

• Journal of the Korean Society of Marine Environment & Safety
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• v.14 no.1
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• pp.55-64
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• 2008

In these days, not only many peoples were killed or wounded by seismic sea waves in Indonesia, but also our country is influenced by disasters such as tsunami and earthquake happened in sea areas adjacent to japan. The precaution against disaster and the rapid communication of disaster informations have become important. In order to minimize and prevent citizens' properties and lives from the loss or the damage by natural calamities suas storms, earthquakes and typhoons, the establishment of communication network for rapid information transmission and the development of system for preventing citizens from disasters should be performed.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2013.06a
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• pp.343-345
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• 2013

해양사고가 증가하고 이에 따른 피해가 늘어남에 따라 선박의 안전항해에 대한 관심이 높아지고 있으며, 해양사고에 대한 규제 및 사고 방지를 위한 기술 개발이 활발하게 진행되고 있다. 선박의 안전 입출항 지원 서비스는 일반적으로 육상과 선박을 연결하는 광대역 무선 데이터 통신기술, 해상 데이터를 처리할 수 있는 메타데이터 기술, 안전운항을 지원하는 서비스의 요소 기술로 구성된다. 본 논문에서는 광대역 애드혹 통신망을 기반으로 하는 안전 입출항 지원 시스템 및 서비스를 정의하고, 이를 시험하기 위한 시뮬레이터 시스템에 대하여 기술한다. 안전 입출항 지원 시스템은 선박에 탑재된 클라이언트에서 육상에 설치된 서버 시스템으로 서비스를 요청하고 해당 정보를 제공 받도록 설계 되었으며, 선박운항 시뮬레이터를 기반으로 하는 테스트 플랫폼을 이용하여 서비스의 구현 가능성을 검토하며, 향후 실 해역 실험을 통해 그 실효성을 검증할 예정이다.