한국정보과학회논문지:정보통신 (Journal of KIISE:Information Networking)

한국정보과학회 (Korean Institute of Information Scientists and Engineers)
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이더네트 기반 DAVIC 주거망에서의 실시간 성능향상 기법

A Real-Time Performance Enhancement Scheme for Ethernet-based DAVIC Residential Network

  • 이정훈 (제주대학교 전산통계학과) ;
  • 김성백 (제주대학교 컴퓨터교육학과) ;
  • 김태웅 (서울대학교 컴퓨터공학부)
  • 발행 : 2000.06.30
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초록

본 논문은 이더네트에 기반한 DAVIC 주거망에서의 실시간 성능향상 기법을 제시하고 성능을 평가한다. 주거망은 접근망으로부터 수신된 멀티미디어 트래픽을 가입자 댁내의 서비스 소비 장치에 전송하는 기능을 가지며 이 트래픽은 종료시한 이내에 전송이 완료되어야 하는 실시간 특성, 즉 시간제약 조건을 갖는다. 케이블의 길이가 짧고 대부분의 트래픽이 게이트웨이 장치인 STU를 통과한다는 특징을 갖기 때문에 큐의 분리 및 패킷의 조기 기각 등의 기능을 부여하고 네트워크의 부하를 적정하게 유지함으로써 종료시한 만족도와 같은 실시간 성능을 향상시킬 수 있다. 이를 위해 STU의 하드웨어 인터페이스와 더불어 스케쥴러, 디바이스 드라이버, 연결 관리자 등의 기능을 기능적으로 설계한다. SMPL을 이용한 모의 실험 결과는 제안된 네트워크가 저비용 주거망으로 사용될 수 있음을 보이며 주거망에서 현재 점유중인 실시간 트래픽에 대해 비실시간 트래픽이 차지할 수 있는 대역폭을 측정한다.

This paper proposes and evaluates a scheme which enhances real-time performance on the Ethernet-based residential network where cable length is very short and most of traffic passes through a specific device. The scheme aims at enhancing deadline meet ratio of the real-time traffic, for example, video stream by means of applying the functionalities such as queue discrimination and early packet discard as well as maintaining network load properly. The design includes the description on hardware interfaces along with the software modules such as scheduler, device driver and connection manager. The simulation results via SMPL suggest that the proposed network can be used as a cost-effective residential network. We also measure the permissible bandwidth for non-real-time traffic without degrading the performance of real-time traffic.

키워드

참고문헌

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