Journal of the Korea Institute of Information and Communication Engineering (한국정보통신학회논문지)

The Korea Institute of Information and Commucation Engineering (한국정보통신학회)
권호 표지

A Study on a Traffic Conditioning Scheme for Alleviating a bias against Reserved Bandwidth Size in Differentiated Services Network

차별 서비스 네트워크에서 예약 대역폭의 편향성을 완화하는 트래픽 조절 기법 연구

  • Published : 2002.04.01
Download PDF
⟨ Previous Next ⟩

Abstract

Differentiated services network (DiffServ) aims to provide the same service to a group of connections that have similar Quality of Service requirements. One of the essential function to realize DiffServ is the traffic conditioning mechanisms to support the required services. The paper proposes the enhanced traffic conditioning mechanism which alleviates a bias against reserved bandwidth size. The simulation results show that the new mechanism is rather insensitive of size of reserved bandwidth, and performs better both in terms of throughput assurance and fair distribution of excess bandwidth in case of well-provisioned and over-provisioned network environment.

차별 서비스 네트워크는 유사한 서비스 품질에 대한 요구조건을 갖는 연결 집합에 대해 동일한 서비스를 제공한다. 트래픽 조절 메커니즘은 차별 서비스 네트워크를 실현시키는 핵심 기능 중의 하나이다. 본 논문은 예약 대역폭의 크기에 따른 처리율의 편향성을 완화시키는 트래픽 조절 메커니즘을 제안한다. 시뮬레이션 방법에 의한 분석을 통해, 제안된 메커니즘은 적절히 배치되거나 과잉 배치된 네트워크 상황에서도 예약 전송률의 크기에 따른 민감성을 완화시켰고, 모든 소스가 예약 대역폭을 달성하고, 초과되는 대역폭에 대해 비교적 공평 히 분배하는 것으로 나타났다.

Keywords

References

  1. S. Blake, et al., An Architecture for Differentiated Services, Internet RFC 2475, Dec., 1998
  2. D. Clark, W. Fang, 'Explicit Allocation of Best Effort Packet Delivery Service', ACM Transactions on Networking, Aug., 1998
  3. I. Yeom and N. Reddy, Impact of marking strategy on aggregated flows in a DiffServ network, IEEE ICMCS '99, 1999
  4. N. Seddigh, et al., Bandwidth Assurance Issues for TCP flows in a Differentiated Services Network, Globecom '99, Dec., 1999
  5. Network simulator (Ns), University of California at Berkeley, CA, 1997
  6. K. Nichols, et al., Definition of the Differentiated Services Field (DS Field) in the IPv4 and IPv6 Headers, Internet RFC 2474, Dec., 1998
  7. V. Jacobson, et al., An Expedited Forwarding PHB, Internet RFC 2598, June, 1999
  8. J. Heinanen, et al., Assured Forwarding PHB Group Internet RFC 2597, June, 1999
  9. Y. Bernet., et al., A Conceptual Model for DiffServ Routers, IETF Internet Draft, draft-ietf-diffserv-model-02.txt, March, 2000
  10. J. Ibanez and K. Nichols, Preliminary Simulation Evaluation of an Assured Service, IETF Internet Draft, Aug. 1998
  11. J. Heinanen, T. Finland and R. Guerin, A Single Rate Three Color Marker, IETF Internet Draft, May, 1999
  12. W. Lin, R.Zheng and J. Hou, How to Make Assured Services More Assured, ICNP '99, Oct., 1999
  13. I. Yeom, J. Hou, Realizing Throughput Guarantees in a Differentiated Services Network, ICMCS, Florence, Italy, June, 1999