Taxonomy and Evaluation of TCP-Friendly Congestion-Control Schemes on Fairness, Aggressiveness, and Responsiveness

Many TCP-friendly congestion control schemes have been proposed to pursue the TCP-equivalence criterion, which states that a TCP-equivalent flow should have the same throughput with TCP if it experiences identical network conditions as TCP. Additionally, the throughput should converge as fast as TCP...

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Bibliographic Details
Published in:IEEE network 2007-11, Vol.21 (6), p.6-15
Main Authors: Tsao, Shih-chiang, Lai, Yuan-cheng, Lin, Ying-dar
Format: Article
Language:English
Subjects:
Bandwidth
Bursting
Classification
Criteria
Delay
Faults
Fluid flow measurement
Internet
Networks
Policies
Programming profession
Protocols
Simulation
Steady-state
Taxonomy
TCP (protocol)
Testing
Throughput
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Summary:Many TCP-friendly congestion control schemes have been proposed to pursue the TCP-equivalence criterion, which states that a TCP-equivalent flow should have the same throughput with TCP if it experiences identical network conditions as TCP. Additionally, the throughput should converge as fast as TCP when the packet-loss conditions change. This study classifies eight typical TCP-friendly schemes according to their underlying policies on fairness, aggressiveness, and responsiveness. The schemes are evaluated to verify whether they meet TCP-equivalence and TCP-equal share. TCP-equal share is a more realistic but more challenging criterion than TCP-equivalence and states that a flow should have the same throughput with TCP if competing with TCP for the same bottleneck. Simulation results indicate that one of the selected schemes, TCP-friendly rate control (TFRC), meets both criteria under more testing scenarios than the others. Additionally, the results under non-periodic losses, low-multiplexing, two-state losses, and bursty losses reveal the causes that bring fault cases to the schemes. Finally, appropriate policies are recommended for an ideal scheme.
ISSN:0890-8044
1558-156X
DOI:10.1109/MNET.2007.4395105