• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.20 no.3
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• pp.25-30
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• 2020

This study is to provide high-quality mobile communication service to subscribers and wireless communication users in a Mobile communication environment. It is about a method to secure the quality of a call by early processing a faulty radio station. The purpose of this study is to design and implement a direction detection system suitable for a mobile communication environment and portable as a method for early detection and resolution of interference and illegal wireless stations occurring in 5G mobile communication. The basic configuration of a portable direction detection system was designed, and a method was proposed to find and repair a faulty wireless station in a short time through manufacturing and experimentation.

• Journal of Broadcast Engineering
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• v.26 no.2
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• pp.197-207
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• 2021

The emergency alert broadcast service based on cellular communications is defined as CBS. However, the CBS just supports a limited text message, which might be unavailable to foreigners, who are unfamiliar with local characters. The CBS protocol relies on a broadcast mechanism. Such a broadcast technology exhibits that the number of outage users significantly increases under poor channel conditions. In this paper, we present a supplementary service technology for 5G CBS, which considerably enhances the accessibility of foreigners and illiterate persons, and the receiver performance. For the enhanced receiver performance, the proposed supplementary service approach effectively exploits the device-based geo-targeting capability that the 5G CBS can afford to offer.

• Electronics and Telecommunications Trends
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• v.36 no.6
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• pp.13-24
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• 2021

Industrial networks has been developing various technologies from fieldbus technology to industrial Ethernet and time-sensitive networking. The industry expects that the 5G mobile network will solve the diverse and highly specific industrial site requirements. Accordingly, 3GPP has been developing standard functions to provide ultra-high reliability, ultra-high speed, ultra-connection, and ultra-low latency services, and 3GPP Rel-16 began developing ultra-low latency and ultra-high reliability communication functions for 5G mobile networks to support vertical industries. In this paper, we show the related standardization trends and requirements to apply industrial IoT service scenarios to 5G mobile networks, and in particular, we introduce 5G system features and extended 5G system architecture to provide time sensitive communication and time synchronization services.

• Information and Communications Magazine
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• v.32 no.9
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• pp.24-30
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• 2015

새로운 서비스의 실현을 목표로 하는 차세대5G이동통신에 대한 비전, 요구사항 및 주요 요소 기술들에 대한 연구가 다양하게 진행 중이다. 지연 시간에 민감한 새로운 저지연 서비스의 지원을 위해 5G 이동통신 비전의 핵심 성능 지표 중 하나로 무선구간에서 1ms 이내의 사용자 데이터 전송이 제시되었다. 본고에서는 ITU-R WP 5D의 5G 이동통신 비전 권고 내용들과 권고 내용을 직접적인 반영하는 5G 관련 기술 개발 단계는 아니지만 3GPP 에서 현재 진행 중인 Release-13 표준화 활동 중에서 사용자 데이터 전송에 있어서 지연 감소를 목표로 논의되는 후보 기술들을 살펴보고 이를 바탕으로 3GPP에서의 관련 표준화 동향을 정리한다.

• The Journal of the Korea institute of electronic communication sciences
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• v.17 no.2
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• pp.229-236
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• 2022

This article studied the radio station inspection method, which utilizes the 8T8R combiner to reduce 5G radio station inspection measurement times. It is a common that 5G radio station inspections measure RF (Radio Frequency) output signals, which correspond to the number of arrayed antennas individually. However, this study suggested a way to save the time spent on existing methods, by comparing measurement values of individual channels and 8T8R. As a result, it is confirmed that when the 8T8R combiner is used, not only the resulting value of radio station inspections was accurate, but also the measurement time being shortened by up to 8 times compared to existing method.

• Proceedings of the Korea Information Processing Society Conference
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• 2019.10a
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• pp.21-23
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• 2019

5G 기반의 스마트시티 서비스 데이터 수집 및 공유 시스템은 5G 융합서비스 플랫폼의 시스템컴포넌트로 설계 및 개발된 시스템이다. 본 시스템은 크게 데이터 수집 서브시스템, 데이터베이스 서브시스템, 및 데이터 공유 서브시스템 세 서브시스템으로 이루어져 있으며, 범용성, 확장성, 유연성 및 개방성에 중점을 두고 설계 및 개발되었다.

• Proceedings of the Korean Society of Broadcast Engineers Conference
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• 2021.06a
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• pp.120-122
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• 2021

최근 기후 변화와 사회적 위험 요인이 결합된 복합 재난의 발생이 급격하게 증가하고 있다. 이러한 재난에 신속하게 대응하기 위하여 통신망을 이용한 긴급재난문자 시스템에 대한 관심이 증가하고 있다. 기존 LTE 기반의 긴급재난문자 서비스는 한정된 자원으로 인해 시스템의 한계가 있으며, 단순한 정보 전달의 기능만 제공하는 문제점이 있다. 5G 이동 통신 서비스가 상용화 되면서 다양한 서비스 제공이 가능하기 때문에 긴급재난문자 서비스를 고도화하기 위한 연구가 수행되고 있다. 본 논문에서는 고도화된 5G 기반 긴급재난문자 서비스의 성능을 검증하기 위한 리빙랩을 설계한다.

• Journal of Information Technology and Architecture
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• v.10 no.2
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• pp.197-209
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• 2013

This study analyzes the nature of consumers and smart phones as well as its limitations that domestic mobile communication companies confront. According to the analysis results, emerging technologies such as 5G communication, pervasive computing, augmented reality, and big data seem to have significant effect on the ICT ecosystem in the near future. Based on the results, this study suggests four counterstrategies for domestic mobile communication companies: big data strategy, preparation of things acting as a main communication agent, new service platform development, and 'total life care service provider' strategy.

• The Journal of the Korea institute of electronic communication sciences
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• v.15 no.5
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• pp.835-840
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• 2020

In this paper, we described the verification results on method by using the computer simulation and practical experiment for reduction of total radiated power (TRP) measurement time consuming tens of hours. TRP measurements are used in the 5G band in order to exactly evaluate the wireless communication equipment, but it takes a long measurement time because of dense sampling interval. Moreover, if there are various beam forming scenarios, the total measurement time increases exponentially. Therefore, the world-wide research on reduction method of the TRP measurement time is intensively on going. The verified method in this paper is to calculate the TRP through effective isotropical radiated power (EIRP). At first, the relation of TRP and EIRP was investigated, and an antenna for testing was designed and constructed. And, the amount of error was analyzed through simulation and measurement. The analysed results showed that the derived TRP through EIRP has very small error. This method could be applied for TRP measurements of 5G wireless communication equipments.

• Electronics and Telecommunications Trends
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• v.31 no.1
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• pp.121-133
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• 2016

모바일 트래픽의 증가와 새로운 서비스의 진화방향은 5세대 이동통신 기술을 요구하고 있다. 혁신적 접근방법의 5세대 이동통신 기술은 이를 실험하고 검증하기 위한 테스트베드 구현이 바탕이 되어야 한다. 또한, 다각도의 핵심 성능 파라미터에 부합하는 각 기술 요소 간 연동 및 점진적 접근방법에 따라 발전하는 4세대 이동통신 기술과의 공존성 검증은 개방형 글로벌 테스트베드의 실현을 필요로 한다. 본고에서는 5세대 이동통신의 요구사항 및 주요기술을 소개하며, 세계 각국과 기관에서 제시하고 있는 5세대 글로벌 테스트베드 구축을 위한 기술동향을 분석하여 소개하고자 한다. 개방형 5세대 테스트베드는 개별적으로 개발된 5세대 기술들의 통합 시험 및 서비스 시험을 제공함으로써 새로운 통신시장 발전의 터전이 될 것이다.