Journal of KIISE:Information Networking (한국정보과학회논문지:정보통신)

Korean Institute of Information Scientists and Engineers (한국정보과학회)
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Selfish Retransmission Scheme in IR-UWB System

IR-UWB 통신 기반의 이기적 재전송 프로토콜

  • 강지명 (한국전기연구원 전기정보망연구그룹) ;
  • 박영진 (한국전기연구원 전기정보망연구그룹) ;
  • 이순우 (한국전기연구원 전기정보망연구그룹) ;
  • 김용화 (한국전기연구원 전기정보망연구그룹) ;
  • 김관호 (한국전기연구원 전기정보망연구그룹)
  • Published : 2009.10.15
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Abstract

In this paper, we focus on the retransmission following transmission failure in impulse radio ultra wideband (IR-UWB). The reasons of transmission failure are classified and a new 'selfish' retransmission protocol is proposed because time hopping can support multiple transmissions at the same time. Selfish retransmission protocol retransmits packets immediately without any kind of timeout or channel observation. Simulation results show that the proposed protocol improves throughput up to 50% and decreases retransmission delay also up to 70%, compared to a conventional retransmission system in IR-UWB.

본 논문에서는 IR-UWB(Impulse Radio Ultra Wide Band) 통신에서 패킷 전송이 실패하였을 경우에 그 원인을 알아보고 이에 맞는 최선의 재전송 프로토콜을 제안한다. 최근 많이 연구되고 있는 IR-UWB 통신에서는 시간 호핑이라는 기능을 사용하면 동시에 여러 사용자가 패킷을 충돌 없이 전송할 수 있는 특징이 있다. 제안하는 이기적 재전송 프로토콜은 패킷 전송 실패를 탐지한 후 타임아웃이나 채널 탐색 없이 이기적으로 재전송을 수행하며, 채널을 효율적으로 사용하여 전체처리율을 50%까지 높이고 재전송시의 패킷 지연 시간을 70%까지 줄이는 효과가 있음을 시뮬레이션을 통하여 검증하였다.

Keywords

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