• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
• /
• 2011.05a
• /
• pp.173-176
• /
• 2011

New paradigm is based on the e-navigation policy which is the harmonised collection, integration, exchange, presentation and analysis of maritime information onboard and ashore by electronic means to enhance berth to berth navigation and related services, for safety and security at sea and protection of the marine environment. One of the requirements is seamless communications between various communication systems. So we need the maritime wireless communications based on the SDR technology. In this paper we analyse characteristics and issues of maritime wireless communication technology and service framework and propose a SDR based maritime system platform which can operate in multi-mode.

• Information and Communications Magazine
• /
• v.33 no.3
• /
• pp.46-52
• /
• 2016

통합공공용 주파수로 분배된LTE(Long Term Evolution) 718~728Mhz(상향) 및 773~783MHz(하향)에서 재난안전 통신망, 철도무선 통신망, 차세대 해상무선 통신망 등과 같은 LTE기반의 공공통신망(Public Network, 이하 공공망)이 상호 공존하여 사용하는 방안에 대하여 연구하였다. 두 개 이상의 복수의 LTE 네트워크가 동일 주파수를 사용하여 서비스하는 경우 통신 커버리지가 겹치는 영역에서의 간섭은 불가피하다. 셀 간 간섭에 의하여Mission Critical한 요구사항이 중요시되는 공공망에서의 품질 열화가 야기되며, 경우에 따라 심각한 상황을 초래할 수 있다. 본고에서는 국내 공공망의 현황을 살펴보고 네트워크 공유방식에 대한 기술 및 표준화 동향, 그리고 해외의 사례를 알아보았다. 국내 통합공공용 주파수에서 동일 주파수를 사용하게 될 공공망 간의 간섭을 최소화 하여 네트워크를 구축 및 연계를 위해서 개별 공공망간의 네트워크를 공유하는 방안을 고려하였다. 국내 공공망의 효율적인 네트워크 연계를 위해서는 개별 공공망의 서비스 특성과 내부 환경을 반영 할 수 있는 연계 방식이 추가적으로 필요하다.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
• /
• 2004.05b
• /
• pp.494-496
• /
• 2004

현재 우리나라에서 발생하는 전체 해양사고 중 약80%가 소형어선에서 발생하고 있는데, 소형어선은 사고발생즉시 전복되기 때문에 전복과 동시에 신속히 구조요청이 이뤄져야 인명피해를 줄일 수 있다. 최근 도입된 GMDSS통신설비들은 자동화되어 매우 빠르게 구조요청이나 조난통보를 할 수 있게되어 있지만, 우리나라에서 발생하는 소형어선의 사고는 대부분 5톤 미만의 선박이고, 이들 소형선박들은 GMDSS제도하에 관리되지 못하고있는 실정이다. 이를 위하여 본 연구를 통하여 우리나라에서 빈번히 발생하는 소형선박의 해양사고를 줄이고자 육상의 이동통신망을 해상으로 화장하여 이용하는 방법을 제시하였다.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
• /
• 2004.04a
• /
• pp.37-42
• /
• 2004

The Ministry of Maritime Affairs ＆ Fisheries have plaining the advancing fishery information integrated system for the fishing present condition, marine resource administration and applicability considering. The fishery information communication system is build up to the raw data ＆ process-network-content. The communication system must be small size, low cost and adapted SSB transceiver, that is using fishery shipping. In this paper We present digital data communication network to exchange information for fishery and safety between fishing ship and coast station in cheeper communication fee using SSB in HF band.

• Journal of the Korean Society of Marine Environment & Safety
• /
• v.24 no.7
• /
• pp.960-966
• /
• 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 Institute of Information and Communication Engineering
• /
• v.14 no.6
• /
• pp.1365-1374
• /
• 2010

The maritime traffic is more complex these days. It is more hard for the small fishing ships to navigated in shores. The requirements for the navigate information system to protect the sea environments and support the small fishing ships are more increased. However, the Inmarsat communication system is too burden to the fishermen with the expensive terminal and call fees. We propose the wireless digital fishing information network which use the existing MF/HF SSB communications system by connecting I-PHONE, PDA, NetBook, Notebook, PC, etc with the PSK31 method and AIS(Automatic Identification System) on the MF/HF radio Band.

• Proceedings of the Korea Information Processing Society Conference
• /
• 2012.04a
• /
• pp.832-835
• /
• 2012

선박 산업에서의 경쟁력 강화를 위해 IT 융합 기술 기반의 고부가가치 기술 및 서비스에 대한 요구가 증대되고 있다. IT 기반의 선박 탑재 장비의 증가로 인해 이러한 장비의 효율적인 관리 및 제어, 이에 기반을 둔 고급 서비스 개발을 위해서 필수적으로 해상에서의 광대역 무선 통신망 구축이 요구된다. 본 논문에서는 선박 간 무선 통신망 구축 및 시뮬레이션 구조에 대해 살펴보고, 해상 환경 시뮬레이션을 위한 시뮬레이션 모델을 제시한다. 또한 효율적인 해상 통신 환경 시뮬레이션을 위한 QualNet 시뮬레이터에서의 BER(Bit Error Rate) 패턴 기반의 시뮬레이션 구조를 제시한다.

• Journal of the Korea Institute of Information and Communication Engineering
• /
• v.18 no.9
• /
• pp.2140-2146
• /
• 2014

Ocean buoys are operated for safe navigation and collecting ocean data. Recently, to reducing marine buoy's damage by ocean weather's bad condition and collision with vessels has been conducted in several field research. This paper's experiment is buoy condition monitoring about predefined data form by users. As a result using Wireless remote control board applying a radio signal processing algorithms, it can observe buoy's state at an interval of three minutes on the land. Acquired data type is changeable according to ocean weather condition or buoy's purpose of using in advance. Also, this paper conducted an experiment such as data-transmission's stability and wireless communication's availability. As results of the analysis of the transmitted data, the solar, wind and wave power indicates the maximum amount of power, 50 W, 20 W and 40 W respectively. The communication system proven through this research can apply to buoy or other ocean facility.

• Journal of the Korea Institute of Information and Communication Engineering
• /
• v.8 no.8
• /
• pp.1620-1625
• /
• 2004

To advance fisheries, we set developmental directions of fishery information by grasping present situations and analyzing maritime & fisheries issues. We promote various policies through effective systematical information data bases, based on both control and utilization of oceanic resources. For these puposes, it is imperative that we set up fisheries communication networks. There are satellite assisted informational networks to assist fishing vessels with their marine based movements. However, there's no hope for poorly equipped fishermen to adopt this network because of extravagant network call charges. So we think that using existing SSB communication system is the best plan. We organize fishery communication network by HF SSB communication which doesn't have operational costs. We build wireless transmitting and receiving stations that are basic systems of informnation, and equip wireless data communication systems by the use of wireless communication network protocols in coastal stations. It is necessary that a fish boat has a terminal device for wireless data communication. In this research we can conclude that if we transmit the location of a fishing boat in-real time through GPS channels then we propose that some methods be formulated to able terminal devices on fishing boats to collect various types of information, such as meteorological and oceanic conditions.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
• /
• 2004.05b
• /
• pp.497-499
• /
• 2004

무선랜은 실내 유선랜의 대안으로서 컴퓨터 통신의 기반 네트워크로 등장하였으나. 장비의 성능향상과 관련기술의 급속한 발전으로 말미암아 다양한 분야에서 그 이용이 시도되고 있다. 최근 5년 간에 발생한 해양사고의 주된 유형은 GMDSS협약에 의해 관리되는 대형 선박과 이에 의하여 관리되지 못하는 5톤 미만의 소형선박과의 충돌 등이며, 그 원인이 소형선박의 영세성으로 안전 통신 시설이 도입되지 못하고 있는 실정이므로 븐 연구에서는 최근 들어 항만내의 해양사고를 줄이고자 도입이 되고 있는 AIS와 유사한 기능을 할 수 있으며 사용자 측면에서의 저가형 시스템을 제안하였다.