Improving Westwood over Bandwidth Instability

Abstract:

The design of TCP/IP is the key of the success of Internet. Due to the network considered as a “black box”, the congestion control algorithm becomes the most important part of TCP. TCP Westwood provides an eligible rate estimation algorithm that improves upon the performance of TCP Reno in wired as well as wireless networks. The improvement is most significant in wireless networks with lossy links. In mobile communication, due to the node mobility, the bandwidth shifting requires higher demands to QoS. In mobile networks with high bandwidth, such as 3G/LTE, the bandwidth will shift rapidly in different positions. We call this bandwidth instability, which is the cause of the degradation of performance. However, Westwood TCP or the other popular TCP cannot response quickly to this situation. In this paper, we verify the problem mentioned above of varied TCP protocols. After that, we propose an improved fast recovery mechanism based on Westwood TCP. The new mechanism can adjust the congestion window in time when the bandwidth shifts.

• Periodical: Advanced Materials Research (Volumes 926-930)
• Pages: 1947-1952
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.926-930.1947
• Online since: May 2014
• Authors: Ming Kun Wang, Wei Zhang*
• Keywords: Bandwidth Shift, Mobile Communication, Non-Congestion, TCP Flow Control, Westwood

References

[1] Pacifico, Davide, et al. Improving TCP performance during the intra LTE handover., Global Telecommunications Conference, 2009. GLOBECOM 2009. IEEE. IEEE, (2009).

DOI: 10.1109/glocom.2009.5425540

[2] Afanasyev, Alexander, et al. Host-to-host congestion control for TCP., Communications Surveys & Tutorials, IEEE 12. 3 (2010): 304-342.

DOI: 10.1109/surv.2010.042710.00114

[3] Mascolo, Saverio, et al. TCP westwood: Bandwidth estimation for enhanced transport over wireless links., Proceedings of the 7th annual international conference on Mobile computing and networking. ACM, (2001).

DOI: 10.1145/381677.381704

[4] Chan, Mun Choon, and Ramachandran Ramjee. TCP/IP performance over 3G wireless links with rate and delay variation., Wireless Networks 11. 1-2 (2005): 81-97.

DOI: 10.1007/s11276-004-4748-7

[5] Grieco, Luigi A., and Saverio Mascolo. Performance evaluation and comparison of Westwood+, New Reno, and Vegas TCP congestion control., ACM SIGCOMM Computer Communication Review 34. 2 (2004): 25-38.

DOI: 10.1145/997150.997155

[6] Sanadhya, Shruti, and Raghupathy Sivakumar. Adaptive flow control for TCP on mobile phones., INFOCOM, 2011 Proceedings IEEE. IEEE, (2011).

DOI: 10.1109/infcom.2011.5935130

[7] Misra, Sudip, et al. QoS-Guaranteed Bandwidth Shifting and Redistribution in Mobile Cloud Environment., (2013): 1-1.

[8] Grieco, Luigi Alfredo, and Saverio Mascolo. Tcp westwood and easy red to improve fairness in high-speed networks., Protocols for High Speed Networks. Springer Berlin Heidelberg, (2002).

DOI: 10.1007/3-540-47828-0_9

[9] Kim, Tai Suk, Ho-Shin Cho, and Dan Keun Sung. Moving elevator-cell system in indoor buildings., Vehicular Technology, IEEE Transactions on49. 5 (2000): 1743-1751.

DOI: 10.1109/25.892579

[10] Kaneko, Kazumi, and Jiro Katto. Reno friendly TCP Westwood based on router buffer estimation., Autonomic and Autonomous Systems and International Conference on Networking and Services, 2005. ICAS-ICNS 2005. Joint International Conference on. IEEE, (2005).

DOI: 10.1109/icas-icns.2005.84