Journal of Broadcast Engineering (방송공학회논문지)

The Korean Institute of Broadcast and Media Engineers (한국방송∙미디어공학회)
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Outage Probability and Throughput Analysis of Hybrid-ARQ Based Opportunistic Relaying with Outdated CSI

지연된 채널 정보를 가진 하이브리드 ARQ 기반 기회적 중계 기법의 불능 확률 및 처리율 분석

  • Park, Jin-Hyun (Department of Electrical Engineering and Computer Science, Seoul National Univ.) ;
  • Lee, Jae-Hong (Department of Electrical Engineering and Computer Science, Seoul National Univ.)
  • 박진현 (서울대학교 전기 컴퓨터공학부) ;
  • 이재홍 (서울대학교 전기 컴퓨터공학부)
  • Received : 2012.01.11
  • Accepted : 2012.03.05
  • Published : 2012.03.30
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Abstract

Hybrid-ARQ and opportunistic relaying are the widely used schemes for obtaining diversity gain in wireless communications. In opportunistic relaying, channel state information(CSI) between relays and destination is required to select the best relay. But if the destination moves very fast, the CSI becomes outdated. In this paper, performance of hybrid-ARQ based opportunistic relaying with outdated CSI is analyzed in outage probability and throughput perspective. The analysis is verified by computer simulations.

하이브리드 ARQ 및 기회적 중계 기법(opportunistic relaying)은 이동통신 환경에서 다이버시티 이득(diversity gain)을 높이기 위해 널리 사용되는 기법이다. 기회적 중계 기법에서 최적의 중계기(relay)를 선택하는 데 중계기와 단말기 간 채널 상태 정보(CSI: channel state information)가 요구되는데, 수신 단말기가 고속으로 이동하는 경우 채널 상태 정보는 지연된(outdated) 정보가 된다. 본 논문에서는 하이브리드 ARQ 기반 기회적 중계 기법에서 지연된 채널 정보를 알 때의 시스템 성능을 불능 확률(outage probability) 및 처리율(throughput) 관점에서 분석하고자 한다. 컴퓨터 모의실험을 통해 이 분석이 정확한지 검증한다.

Keywords

Acknowledgement

Supported by : 한국연구재단

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