Journal of the Institute of Electronics Engineers of Korea TC (대한전자공학회논문지TC)

The Institute of Electronics and Information Engineers (대한전자공학회)
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Hop-by-Hop Priority Increasing Scheme for Improving End-to-end Throughput in Multi-Hop OBS Networks

다중 홉 광 버스트 교환망에서 종단간 수율 향상을 위한 홉 단위 우선 순위 증가 기법

  • 김병철 (경북대학교 전자전기컴퓨터학부) ;
  • 조유제 (경북대학교 전자전기컴퓨터학부)
  • Published : 2003.10.01
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Abstract

In this paper, we classified the wavelength reservation mechanisms of optical burst switching (OBS), and investigated the path length priority effect of the offset time/delayed reservation (OT/DR)-based scheme like the just-enough-time (JET) protocol. And, we showed that the fiber delay line (FDL)-based scheme can avoid the path length priority effect in multiple hop network environments. Also, we proposed a novel FDL/DR with hop-by-hop priority increasing (HPI) scheme which can improve the end-to-end throughput by increasing the priority of bursts hop-by-hop using the input FDLs at each node. The simulation results showed that the proposed FDL/DR with HPI scheme could avoid the path length priority effect and enhance the end-to-end throughput in multiple hop network environments.

본 논문에서는 광 버스트 교환 방식에서 사용되는 제어 패킷 처리 시간 보상 기법 및 자원 예약 기법을 분류하고 다중 홉 환경에서 대표적인 예약 방식인 OT/DR (Offset Time/Delayed Reservation) 기반 JET(Just-Enough-Time) 방식의 문제점인 Path length priority effect를 분석하였다. 그리고, 이러한 문제점을 해결하면서 입력 FDL(Fiber Delay Line)을 사용하여 홉 단위로 우선 순위를 증가시켜 종단간 수율을 개선시킬 수 있는 FDL/DR 방식 기반의 홉 단위 우선 순위 증가 기법을 제안하고 시뮬레이션을 통하여 성능을 비교 분석하였다. 시뮬레이션을 통한 성능 분석 결과 제안된 방식은 다중 홉 환경에서 path length priority effect로 인해 발생하는 기존 방식의 문제점을 개선하여 종단간 성능이 향상됨을 알 수 있었다.

Keywords

References

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