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Fair early drop marker for improving TCP fairness in multiple domain DiffServ networks

Authors
Hur, KyeongEom, Doo-SeopLee, Jae-HoPark, NhoKyungHwang, Kwang-il
Issue Date
26-3월-2007
Publisher
ELSEVIER SCIENCE BV
Keywords
assured services; demotion; promotion; differentiated services; fairness; internet; quality-of-service
Citation
COMPUTER COMMUNICATIONS, v.30, no.6, pp.1205 - 1219
Indexed
SCIE
SCOPUS
Journal Title
COMPUTER COMMUNICATIONS
Volume
30
Number
6
Start Page
1205
End Page
1219
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/125800
DOI
10.1016/j.comcom.2006.12.004
ISSN
0140-3664
Abstract
The differentiated services (DiffServ) model, proposed as a scalable way of providing quality of service in the Internet, provides packet level service differentiation on a per-hop basis. To provide the end-to-end service differentiation more efficiently for the assured services, as as a source marker, an interdomain marker placed at the boundary edge routers connecting network domains is necessary because an Internet connection usually spans through a path involving one or more network domains. Such an interdomain marker should be operated at the aggregate flow level due to the scalability problem. The random early demotion and promotion (REDP) marker was proposed as an interdomain marker. It introduces randomness and early decisions on the three-color packet marking process at the aggregate flow level to remove the phase effect that brings about the unfairness in the demotion and promotion among different flows. The REDP marker achieves good UDP fairness in demoting and promoting packets through random and early marking decisions on packets. However, TCP fairness of the REDP marker is not obvious as for UDP sources. In this paper, we propose a new interdomain marker to resolve the problem of the REDP marker. Instead of unfair packet droppings at the RIO buffers in the core routers which cause unfairness of TCP flows, it fairly drops the green packets of each TCP flow with a token filling rate configuration method before they enter into the core routers. By doing this fair early packet dropping, it increases TCP fairness at a minor expense for the total throughput. (c) Elsevier B.V. All rights reserved.
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