Title: Performance evaluation of threshold-based control mechanism for Vegas TCP in heterogeneous cloud networks

Authors: Rung-Shiang Cheng, Ming-Yi Shih, Chih-Chun Yang

Addresses: Department of Computer and Communication, Kun Shan University, No. 949, Dawan Rd., Yongkang Dist., Tainan City 710, Taiwan. ' Department of Computer Science and Information Engineering, National Changhua University of Education, No. 2, Shi-Da Rd., Changhua City 500, Taiwan. ' Department of Computer and Communication, Kun Shan University, No. 949, Dawan Rd., Yongkang Dist., Tainan City 710, Taiwan

Abstract: Many studies have shown that Vegas TCP has a better throughput and stability than Reno TCP in homogeneous networks with a single TCP flavour, but performs less well in heterogeneous networks in which two-TCP flavours coexist. The progressive behaviour of Reno TCP and the conservative behaviour of Vegas TCP cause a bias when they are used simultaneously, and thus, Vegas TCP fails to obtain a fair share of the bandwidth. This paper examines the origins of this bias and proposes a threshold-based congestion control mechanism designed to alleviate the resulting unfairness problem. The simulation results show that the proposed scheme achieves a higher throughput than the conventional Vegas TCP scheme and preserves the stability of the conventional scheme when used in heterogeneous cloud networks.

Keywords: Reno TCP; unfairness; heterogeneous networks; performance evaluation; threshold-based control; Vegas TCP; cloud networks; cloud computing; transmission control protocol; congestion control.

DOI: 10.1504/IJIPT.2010.039231

International Journal of Internet Protocol Technology, 2010 Vol.5 No.4, pp.202 - 209

Available online: 28 Mar 2011 *

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