한국통신학회논문지 B : 네트워크 및 융합 서비스, v.28, no.4C, pp.343-355
ISSN
1226-4717
Publisher
한국통신학회 (KICS)
Language
Korean
Type
Journal Article
Abstract
라우터에서 공평 대역 할당은 네트워크 폭주 상황에 반응하여 흐름을 제어하는 트래픽을 그렇지 않은 트래픽으로부터 보호한다. 그러나 Weighted Fair Queueing, Flow Random Early Drop 등의 전통적인 공평 대역 할당 방법은 상태 관리나 버퍼 관리, 스케쥴링 등을 흐름 단위로 수행하므로 초고속 네트워크의 백본에서 사용되는 경우 구현의 복잡성 뿐 아니라 흐름의 증가에 따른 네트위크의 확장성과 견고성을 확보하기 위해 코어 라우터에서의 흐름단위 관리를 배제하는 Core-stateless 메커니즘들이 제안되었다. Core-Stateless Fair Queueing 과 Rainbow Fair Queueing 등은 Core-Stateless 네트워크에서 근접한 공평 대역 할당 메커니즘들에 비해 단순해진 패킷 레이블 할당 방법과 패킷 폐기 방법을 사용하여 실제 구현 가능성을 높인 새로운 Core-stateless 알고리즘인 Simple Layered Fair Queueing (SLFQ) 를 제안하고 몇가지 형태의 시뮬레이션과 그 결과를 다른 메커니즘의 결과와 비교하면서 대역 공평성 보장 정도를 확인한다. 마지막으로 제안된 알고리즘의 향후 응용 가능성을 제시한다.
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