Abstract
Cognitive radio (CR) networks experience fluctuating spectrum availability that impacts the end to end bandwidth of a connection. In this paper, we conduct an extensive simulation study of three different window-based TCP flavors- NewReno, Westwood+, and Compound, each of which has unique methods to determine the available bandwidth and scale the congestion window appropriately. These protocols also differ in their respective sensitivities to the metrics of round trip time, loss rate, residual buffer space, among others. These metrics exhibit divergent behavior in CR networks, as compared to classical wireless networks, owing to the frequent channel switching and spectrum sensing functions, and this influences the choice of the TCP protocol. Our ns-3 based simulation study reveals which specific rate control mechanism in these various TCP protocols are best suited for quickly adapting to varying spectrum and bandwidth conditions, and ensuring the maximum possible throughput for the connection.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
Preview
Unable to display preview. Download preview PDF.
References
Akyildiz, I.F., Lee, W.Y., Chowdhury, K.R.: CRAHNs: Cognitive radio ad hoc networks. Elsevier Ad Hoc Networks 7(5), July 2009
Chowdhury, K.R., Di Felice, M., Akyildiz, I.F.: TCP CRAHN: A Transport Control Protocol for Cognitive Radio Ad Hoc Networks. IEEE Trans. on Mobile Computing 12(4), 790–803 (2011)
Al-Ali, A., Chowdhury, K.R.: An Equation-based Transport Protocol for Cognitive Radio Networks. Elsevier Ad Hoc Networks 11(6), 1836–1847 (2013)
Floyd, S., Henderson, T.: The NewReno Modification to TCP’s Fast Recovery Algorithm. Internet Engineering Task Force, Request for Comments (Experimental 2582), April 1999
Mascolo, S., Casetti, C., Gerla, M., Sanadidi, M.Y., Wang, R.: TCP westwood: bandwidth estimation for enhanced transport over wireless links. In: Proc. of the ACM Conf. on Mobile Computing and Networking, pp. 287–297 (2001)
Tan, K., Song, J., Zhang, Q., Sridharan, M.: A compound TCP approach for high-speed and long distance networks. In: MSR-TR-2005-86 (techreport) Microsoft Research, July 2005
Author information
Authors and Affiliations
Corresponding author
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2015 Institute for Computer Science, Social Informatics and Telecommunications Engineering
About this paper
Cite this paper
Zhou, F., Al Ali, A., Chowdhury, K. (2015). Investigation of TCP Protocols in Dynamically Varying Bandwidth Conditions. In: Weichold, M., Hamdi, M., Shakir, M., Abdallah, M., Karagiannidis, G., Ismail, M. (eds) Cognitive Radio Oriented Wireless Networks. CrownCom 2015. Lecture Notes of the Institute for Computer Sciences, Social Informatics and Telecommunications Engineering, vol 156. Springer, Cham. https://doi.org/10.1007/978-3-319-24540-9_14
Download citation
DOI: https://doi.org/10.1007/978-3-319-24540-9_14
Published:
Publisher Name: Springer, Cham
Print ISBN: 978-3-319-24539-3
Online ISBN: 978-3-319-24540-9
eBook Packages: Computer ScienceComputer Science (R0)