TCP와 UDP 흐름의 공평성 향상을 위한 트래픽 조절 메커니즘 = A Traffic Conditioning Mechanism for Enhancing the Fairness of TCP and UDP Flows

국문 초록 (Abstract)

차별서비스 네트워크는 IP 네트워크를 기반으로 서비스 품질에 대해 유사한 요구조건을 갖는 연결 집합에 대해 동일한 서비스를 제공한다. 트래픽 조절 메커니즘은 차별서비스 네트워크를 실현시키는 핵심 기능 주에 하나이다. 본 논문은 TCP 와 U에 트래픽이 공존하는 네트워크 상황에서 TCP 트랙픽의 예약 전송률을 보장하고, 과잉 배치된 네트워크 구조에서 UDP와T TCP 흐름이 여분 대역폭을 공평하게 분배할 수 있는 개선된 트래픽 조절 메커니즘을 제안한다. 시뮬레이션 방법에 의한 분석을 통해, 제안된 메커니즘은 다양한 네트워크 상황에 대해서 UDP 흐름에 따른 TCP 트래픽의 성능 저하 문제를 크게 완화하고, 여분 대역폭에 대해서도 비교적 공평하게 분배한 것으로 나타났다.

다국어 초록 (Multilingual 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 mechanism. The paper proposes the enhanced traffic conditioning mechanism which can assure the reserved rates of TCP and UDP flows and support fair distribution of excess bandwidth. The simulation results show that the new mechanism is rather insensitive of the effect of UDP against TCP throughput, 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.

참고문헌 (Reference)

1 Network simulator, "University of California at Berkeley" 1997

2 P. Pieda, "The Dynamics of TCO and UDP interaction in IP QoS Differentiated Services Networks The 3rd Canadian Conference on Broadband Research" 1999

3 "Realizing Throughput Guarantees in a Differentiated Services Network" 1999

4 "Preliminary Simulation Evaluation of an Assured Service" 1998

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6 "How to Make Assured Services More Assured" 1999

7 Clark, "Explicit Allocation of Best effort Packet Delivery Service ACM Transactions on Networking" 1998

8 "Bandwidth Assurance Issues for TCP flows in a Differentiated Services Network" 1999

9 "Assured Forwarding PHB Group Internet RFC 2597" 1999

10 "An Expedited Forwarding PHB" 1999

11 "An Architecture for Differentiated Services" 1998

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13 "A Conceptual Model for DiffServ Routers, IETF Internet Draft, draft-ietf-diffserv-model-02.txt." 2000