An Enhanced Slow-Start Mechanism for TCP Vegas

  • Authors:

  • Cheng-Yuan Ho;Yi-Cheng Chan;Yaw-Chung Chen

  • Affiliations:

  • Department of Computer Science and Information Engineering National Chiao Tung University;Department of Computer Science and Information Engineering National Changhua University of Education;Department of Computer Science and Information Engineering National Chiao Tung University

  • Venue:
  • ICPADS '05 Proceedings of the 11th International Conference on Parallel and Distributed Systems - Volume 01
  • Year:
  • 2005

Quantified Score

Hi-index 0.00

Visualization

Abstract

In this article, we present a new slow-start variant, which improves the throughput of TCP Vegas, we call this new mechanism Gallop-Vegas which quickly ramps up to the available bandwidth and reduces the burstiness during the slow-start phase. Since TCP (Transmission Control Protocol) is known to send bursts of packets during its slowstart phase due to the fast increase of window size and the ACK-clock based transmission. This phenomenon causes TCP Vegas to change from slow-start phase to congestionavoidance phase too early in the large BDP (bandwidthdelay product) links. Therefore, in Gallop-Vegas, we increase the congestion window size with a rate between exponential growth and linear growth during slow-start phase. Our extensive simulation results show that Gallop- Vegas significantly improves the performance during the slow-start phase. Furthermore, it is implementation feasible because only sending part needs to be modified.