한국통신학회논문지 (The Journal of Korean Institute of Communications and Information Sciences)

  • 제38B권4호
  • /
  • Pages.229-239
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  • 2013
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  • 1226-4717(pISSN)
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  • 2287-3880(eISSN)
한국통신학회 (The Korean Institute of Commucations and Information Sciences)
권호 표지
DOI QR코드

DOI QR Code

셀룰라 네트워크 환경에서 시스템 레벨 시뮬레이션 기반 단말간 직접통신 성능 분석

Performance Evaluation of Device-to-Device Communications Based on System-Level Simulation in Cellular Networks

  • 이호원 (국립한경대학교 전기전자제어공학과) ;
  • 최현호 (국립한경대학교 전기전자제어공학과) ;
  • 정수정 (한국전자통신연구원 무선액세스시스템연구부) ;
  • 장성철 (한국전자통신연구원 무선액세스시스템연구부) ;
  • 권동승 (한국전자통신연구원 무선액세스시스템연구부)
  • 투고 : 2012.01.28
  • 심사 : 2013.04.04
  • 발행 : 2013.04.30
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초록

최근 셀룰라 네트워크의 주파수 효율을 높이고 다양한 사용자 경험을 제공하기 위하여 단말간 직접 통신(device-to-device, D2D) 기술이 주목을 받고 있다. 본 논문에서는 D2D 관련 표준 및 기존 연구에 대한 선행 조사를 통하여 D2D 통신이 가지는 많은 장점들과 이 장점들이 제대로 실제 시스템에 적용되기 위해서 해결되어야 할 주요 문제점들에 대해서 살펴본다. 특히, 가장 중요시 되는 셀룰라 링크와 D2D 링크간의 간섭 이슈를 고려하여 5가지 D2D 자원할당 및 간섭제어 시나리오에 대해 시스템 레벨 시뮬레이션을 수행한다. 성능 분석 결과, D2D를 사용할 경우에 주파수 재사용 및 데이터 오프로딩(off-loading) 효과로 인해 전체 셀 용량 및 D2D 사용자 전송률이 현저히 증가하며, 이들 성능을 최대화하는 최적 D2D 통신 허용 반경값이 존재함을 알 수 있다.

Recently, device-to-device (D2D) communications have been highlighted to improve the spectral efficiency and offer various user experiences in cellular networks. In this paper, we survey standards and literatures related to the D2D technology and address various advantages of D2D technology, and the problems to be resolved before practically implemented. Especially, by considering an important interference issue between cellular and D2D links, five resource allocation and interference management scenarios are provided and their performances are evaluated through the system level simulations. The simulation results show that the use of D2D significantly improve the cell capacity and the D2D user rate due to the effects of frequency reuse and data off-loading. Notably, it is also shown that an optimal D2D communication range exists to maximize the system performance.

키워드

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