An End-to-End Proactive TCP Based on Available Bandwidth Estimation with Congestion Level Index

Authors:
Sangtae Bae;Doohyung Lee;Chihoon Lee;Jinwook Chung;Jahwan Koo;Suman Banerjee
Affiliations:
Korea Institute of S&T Evaluation and Planning,;School of Information and Communication Engineering, Sungkyunkwan University, Suwon, South Korea 440-746;School of Information and Communication Engineering, Sungkyunkwan University, Suwon, South Korea 440-746;School of Information and Communication Engineering, Sungkyunkwan University, Suwon, South Korea 440-746;Computer Sciences Department, University of Wisconsin-Madison, USA WI 53706;Computer Sciences Department, University of Wisconsin-Madison, USA WI 53706
Venue:
Proceedings of the Symposium on Human Interface 2009 on Human Interface and the Management of Information. Information and Interaction. Part II: Held as part of HCI International 2009
Year:
2009

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Abstract

Transmission control protocol (TCP) is one of the core communica-tion protocols of the Internet protocol suite. For this reason, significant enhancements on TCP have been made in both wired and wireless networks. In this paper, we propose an end-to-end proactive TCP based on available bandwidth estimation with congestion level index (CLI), called CLI-based TCP. From the previous TCP schemes, we have found that the TCP sender does not know how much the network is congested because network congestion is represented by only two status, congestion exists or not. Therefore, we define the concept of CLI, outline the procedure of the CLI algorithm, and describe how to realize the CLI-based TCP. In addition, we have shown that CLI-based TCP can handle network congestion more minutely and improve overall TCP performance. Simulation results show that under 90% traffic load, the CLI-based TCP outperforms TCP New Jersey by 49.8% improvement in goodput.