Sustaining TCP throughput using assured forwarding and ECN in a Differentiated Services network

Author

Leung, Ivan Kai-Kin ; Muppala, Jogesh K.

Author_Institution

Dept. of Comput. Sci., Hong Kong Univ. of Sci. & Technol., Kowloon, China

fYear

2002

fDate

2002

Firstpage

143

Lastpage

150

Abstract

This paper examines the interaction among the congestion control mechanisms built into the Transmission Control Protocol (TCP), the Assured Forwarding (AF) PHB of Differentiated Services (DiffServ) mechanism, and Explicit Congestion Notification (ECN) mechanism. We show that ECN improves the fairness in sharing excess bandwidth among different AF flows. We then propose two mechanisms: (a) an out marking scheme, and (b) throughput sustaining scheme to foster cooperation between ECN and AF mechanisms to further improve the throughput of TCP sources. Our results show that the new schemes achieve significant improvement in the TCP throughput performance

Keywords

Internet; bandwidth allocation; performance evaluation; quality of service; queueing theory; telecommunication traffic; transport protocols; AF PHB; AF flows; Assured Forwarding; DiffServ; Differentiated Services network; ECN; Explicit Congestion Notification; TCP; Transmission Control Protocol; congestion control; excess bandwidth sharing; fairness; out marking scheme; per-hop behavior; performance; throughput sustaining scheme; Aggregates; Bandwidth; Computer science; Diffserv networks; Harmonic analysis; Intelligent networks; Network topology; Quality of service; Throughput; Transport protocols;

fLanguage

English

Publisher

ieee

Conference_Titel

Performance, Computing, and Communications Conference, 2002. 21st IEEE International

Conference_Location

Phoenix, AZ

Print_ISBN

0-7803-7371-5

Type

conf

DOI

10.1109/IPCCC.2002.995145

Filename

995145