• Title/Summary/Keyword: 5G 통신

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Standardization Trends on 5G Mobile Communication System (5G 이동통신 표준화 현황)

  • Yeh, C.I.;Kim, E.A.;Lee, K.S.;Kim, J.H.;Moon, S.H.;Kim, C.S.;Lee, J.H.;Kim, M.H.;Lee, J.H.
    • Electronics and Telecommunications Trends
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    • v.31 no.5
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    • pp.80-89
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    • 2016
  • 현재 이동통신 분야에서는 5세대(5th Generation: 5G) 이동통신 표준화 작업이 한창 진행 중이며, 그 표준화 현황을 살펴보기 위하여 대표적인 국제 표준화 단체인 ITU-R에서의 활동 및 3GPP에서의 활동을 살펴보고자 한다. 최근 ITU-R WP 5D에서는 IMT-2020으로 명명되는 5세대 이동통신 비전 문서를 토대로 기술 요구사항 및 평가 기준 마련을 위한 작업이 수행되고 있으며, 3GPP의 TSG SA, RAN 및 하위 WG에서는 관련 상위 레벨 요구사항 정립 및 무선 구간에서의 기술적인 SI 논의가 수행되고 있다. 본고에서는 위 두 표준화 활동을 위주로 5G 이동통신에 대한 현황을 기술한다.

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Performance Evaluation of PBCH Detection of LTE-Based 5G MBMS and 5G NR for Cellular Broadcast (셀룰러 방송을 위한 LTE 기반 5G MBMS와 5G NR의 PBCH 검출 성능 평가)

  • Ahn, Haesung;Kim, Hyeongseok;Cha, Eunyoung;Kim, Jeongchang;Ahn, Seok-Ki;Kwon, Sunhyoung;Park, Sung-Ik;Hur, Namho
    • Journal of Broadcast Engineering
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    • v.26 no.6
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    • pp.766-777
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    • 2021
  • This paper presents an improved scheme for detection of the physical broadcast channel (PBCH) in long-term evolution (LTE)-based fifth-generation (5G) multimedia broadcast and multicast services (MBMS) and 5G new radio (NR) for cellular broadcast. In the time domain, by combining the correlations between the received signal and primary synchronization signal (PSS) within all SS/PBCH blocks, the frame synchronization and the start position of the SS/PBCH blocks can be obtained. In this paper, to improve the detection performance of PBCH for 5G NR, a combining scheme of PBCH signals within a frame is proposed. In addition, the performance of the proposed detection scheme is evaluated and the performance is compared with the conventional scheme for PBCH detection of LTE-based 5G MBMS. The simulation results show that the detection performance of PBCH for 5G NR is improved by combining the PBCH signals and outperforms LTE-based 5G MBMS under the additive white Gaussian noise (AWGN), fixed, and mobile environments.

Trend Analysis of 5G Core-Net Technology (5G 코어 네트워크 기술 동향 분석)

  • Kim, J.S.;Song, J.T.;Kim, J.H.;Jung, H.Y.
    • Electronics and Telecommunications Trends
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    • v.28 no.6
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    • pp.37-48
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    • 2013
  • 향후 2020년경에는 현재보다 훨씬 빠른 5세대(5G) 이동통신이 도래할 것으로 예상하고 있다. 현재 5G에 관해서는 EU를 중심으로 여러가지 선행 연구 프로젝트가 진행되고 있는 수준이며, 아직까지 본격적으로 활동하고 있는 국제 표준화 그룹은 없다. 무선 접속(RAN: Radio Access Network) 부분에서는 몇몇 5G 후보 기술을 도출하는 등 나름대로 표준화 방향이 제시되고 있지만, 코어 네트워크(CN: Core Net) 부분에서는 그 활동이 미미한 실정이다. 본 논문은 5G 이동통신의 일반적인 요구사항 및 비전을 살펴보고, 5G 코어 네트워크부분에 대한국내외 연구개발 동향과 주요 요소 기술의 동향을 분석한다.

Performance Analysis of High-Speed 5G MIMO System in mmWave Band (mmWave대역에서 고속 이동상태 5G MIMO 시스템 성능 분석)

  • Lee, Byung-Jin;Ju, Sang-Lim;Kim, Nam-il;Kim, Kyung-Seok
    • The Journal of the Institute of Internet, Broadcasting and Communication
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    • v.18 no.5
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    • pp.103-109
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    • 2018
  • One of the 5G goals is provide to high data rates for users moving at high speeds, such as trains. High mobility scenarios such as high speed train (HST) scenarios are expected to be typical scenarios for fifth generation communication systems. As the HST develops rapidly, it is necessary to transmit wireless communication data to train passengers, and the communication speed required by users is gradually increasing. HST users require high network capacity and stable communication services regardless of the location or speed of the HST communication system. Therefore, a transmission frame is constructed for the 5G mobile communication system in the mm band to be used for the fifth generation mobile communication, the HST communication system is implemented, and the performance of the wideband non-stationary MIMO HST channel is analyzed in the HST scenario.

Scheduling Scheme Proposition for Spectral Efficiency Improvement in FD-MIMO (FD-MIMO 시스템에서 주파수 효율 향상을 위한 스케줄링 기법 제안)

  • Kim, Young-Jae;Ju, Sang-Lim;Jeong, Won-Ho;Kim, Kyung-Seok
    • Journal of Satellite, Information and Communications
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    • v.12 no.3
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    • pp.8-14
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    • 2017
  • In 4G mobile communication, data services of mobile communication began to be provided in earnest. As a result, services such as the internet and multimedia including the video have become the main contents in the recent wireless traffic. Accordingly, research on 5G mobile communication with higher transmission rate has been actively carried out. 5G mobile communication is expected to be based on 4G for compatibility with existing terminals. Therefore, the simulation of this paper is based on 4G and we propose a new user scheduling scheme based on the Max throughput scheduling algorithm to improve system performance. This paper derives the frequency efficiency and fairness to compare the existing user scheduling algorithm with the proposed user scheduling algorithm. The proposed scheme shows better frequency efficiency and fairness than Max throughput in all situations. This paper contributes to the research for improving the system performance of 5G mobile communication technology, and I hope that it will help some of the ongoing standardization work.

Security Vulnerability and Countermeasure on 5G Networks: Survey (5G 네트워크의 보안 취약점 및 대응 방안: 서베이)

  • Hong, Sunghyuck
    • Journal of Digital Convergence
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    • v.17 no.12
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    • pp.197-202
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    • 2019
  • In line with the era of the 4th Industrial Revolution, 5G technology has become common technology, and 5G technology is evaluated as a technology that minimizes the speed and response speed compared to 4G using technologies such as network slicing and ultra-multiple access. 5G NR stands for 5G mobile communication standard, and network slicing cuts the network into parallel connections to optimize the network. In addition, the risk of hacking is increasing as data is processed in the base station unit. In addition, since the number of accessible devices per unit area increases exponentially, there is a possibility of base station attack after hacking a large number of devices in the unit area. To solve this problem, this study proposes the introduction of quantum cryptography and 5G security standardization.

The Technical Trends for Intercell Interference Control including Small Cells (소형셀 간섭제어 기술동향)

  • Jwa, H.K.;Kim, S.H.;Na, J.H.
    • Electronics and Telecommunications Trends
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    • v.31 no.5
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    • pp.51-58
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    • 2016
  • 모바일 기기와 데이터 이용량의 폭발적인 증가에 따라 제한된 자원으로 좀 더 빠르고 많은 용량을 처리하기 위한 다양한 기술 중 단위 면적당 용량 증대가 가능한 소형 셀 기술이 3G/4G 이동통신 시스템뿐만 아니라 5G 이동통신에서도 더욱 밀집한 셀 구성과 셀 소형화 형태로 연구 중에 있다. 이에 따라 셀 간 간섭을 제어하는 기술에 대한 연구도 꾸준히 진행되고 있다. 본고에서는 셀 간 간섭제어 기술에 대한 표준화 동향과 5G 이동통신에서의 간섭제어 기술에 대한 동향 및 방향에 대해 소개하고자 한다.

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Analysis of Radio Spectrum Policy for the Fifth Generation Mobile Communications (5G 이동통신을 위한 전파정책 분석)

  • Kim, Chang-Joo
    • The Journal of Korean Institute of Electromagnetic Engineering and Science
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    • v.26 no.8
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    • pp.679-689
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    • 2015
  • The 5G mobile communication technologies have been extensively developed with the era of mobile broadband, but spectrum policy for this service has not yet set up. In this paper, We have investigated the 5G mobile service and analyzed the 5G spectrum policy taking the developing technologies into account. Based on the results of these analyses, We propose an expansion of spectrum sharing in the 3~5 GHz bands, spectrum harmonization of 5 GHz bands, and restructuring of spectrum management administration from currently three distributed management to centralized spectrum management structure.

Standardization Trends in Network Slicing and Management Technologies of 5G Core Network (5G 네트워크 슬라이싱 및 네트워크 관리 기술 표준화 동향)

  • Lee, S.I.;Lee, J.H.;Shin, M.K.
    • Electronics and Telecommunications Trends
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    • v.32 no.2
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    • pp.62-70
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    • 2017
  • 5G 네트워크 기술은 4G LTE 이동 통신 기술의 후속 기술로서, ITU-R, ITU-T, NGMN, 3GPP 등의 표준화 그룹을 중심으로 고성능, 저지연, 고가용성 등의 특성을 가지는 새로운 Clean-slate 형태의 이동 통신 시스템 및 네트워크 구조를 설계 중이다. 특히 다양한 5G 융합 서비스를 효율적으로 제공하기 위해 서비스 및 네트워크 자원의 독립성 및 유연성을 지향하는 네트워크 슬라이싱을 적용하고, ETSI NFV 네트워크 기능 가상화 기술을 포함하는 네트워크 관리 구조를 도입하고자 한다. 본고에서는 5G 네트워크 슬라이싱 기술 및 5G 네트워크 관리 기술의 개념 및 요구사항을 분석하고, 이에 대해 3GPP SA WG2 및 SA WG5에서 진행 중인 표준화 현황을 소개한다.

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Standardization Trends for Operation of Unmanned Aerial Vehicles based on 5G (5G 기반 무인 비행체 운용 표준화 동향)

  • Lee, H.;Bae, J.S.;Bahng, S.J.;Lee, H.S.
    • Electronics and Telecommunications Trends
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    • v.36 no.4
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    • pp.13-22
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    • 2021
  • Among the activities of 3GPP for operating 5G-based unmanned aerial vehicles, we introduce several use cases of UAVs in 5G mobile communication such as radio access node onboard UAV, simultaneous support data transmission for UAVs and eMBB users, autonomous UAVs controlled by AI, isolated deployment of radio access through UAV, and separation of UAV service area. From this, we further summarize 5G mobile communication requirements for UAVs, including definition and operational criteria of UAS, UAS remote identification requirements, UAS usage requirements, and performance requirements. Finally, regarding 5G mobile communication-based UAS connectivity, identification and tracking support, we discuss the 3GPP UAV architecture, seven major problems, the proposed solutions to each problem, and propose the results for future specification work.