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Author Mellia, Marco ♦ Meo, Michela ♦ The, Enables
Source CiteSeerX
Content type Text
File Format PDF
Language English
Subject Domain (in DDC) Computer science, information & general works ♦ Data processing & computer science
Subject Keyword Live Measurement ♦ Tcp-sf Source ♦ Tcp Performance ♦ Tcp Congestion Control ♦ Server Tcp Stack ♦ Real Traffic Measurement ♦ Retransmission Timeout ♦ Segmentation Algorithm ♦ Analytical Model ♦ Full-sized Segment ♦ Byte-oriented Scheme ♦ Tcp Flavor ♦ Congestion Window ♦ Tcp Performance Evaluation ♦ Several Buffer Management Scheme ♦ Small Window Region ♦ Classic Tcp ♦ Short-lived Flow ♦ Additive-increase Multiplicative-decrease Paradigm ♦ Novel Segmentation Algorithm ♦ Fast Retransmit Recovery ♦ Index Term Performance Evaluation ♦ Flexible Segmentation Algorithm ♦ Tcp Modification ♦ Valid Tool ♦ General Scope ♦ Tcp Smart Framing ♦ Protocol Design ♦ Fast Recovery ♦ Packet Loss ♦ Recent Tcp Enhancement ♦ Key Idea ♦ In-flight Segment
Description Fast Retransmit/Recovery algorithms even when the congestion window is small. Without modifying the TCP congestion control based on the additive-increase/multiplicative-decrease paradigm, TCP-SF adopts a novel segmentation algorithm: while Classic TCP always tries to send full-sized segments, a TCP-SF source adopts a more flexible segmentation algorithm to try and always have a number of in-flight segments larger than 3 so as to enable Fast Recovery. We motivate this choice by real traffic measurements, which indicate that today’s traffic is populated by short-lived flows, whose only means to recover from a packet loss is by triggering a Retransmission Timeout. The key idea of TCP-SF can be implemented on top of any TCP flavor, from Tahoe to SACK, and requires modifications to the server TCP stack only, and can be easily coupled with recent TCP enhancements. The performance of the proposed TCP modification were studied by means of simulations, live measurements and an analytical model. In addition, the analytical model we have devised has a general scope, making it a valid tool for TCP performance evaluation in the small window region. Improvements are remarkable under several buffer management schemes, and maximized by byte-oriented schemes. Index Terms—Performance evaluation, protocol design, TCP enhancements. I.
Proceedings of the 2nd International Workshop on QoS in Multiservice IP Networks (QoS-IP 2003
Educational Role Student ♦ Teacher
Age Range above 22 year
Educational Use Research
Education Level UG and PG ♦ Career/Technical Study
Learning Resource Type Article
Publisher Date 2003-01-01