Analysis of Traffic Characteristics of Skype Video Calls Over the Internet

  • Gulshan Kumar
  • N. G. GoudruEmail author
Conference paper
Part of the Advances in Intelligent Systems and Computing book series (AISC, volume 906)


Skype is an important application of real-time systems (RTS). It uses Transmission Control Protocol (TCP) for connection establishment and User Datagram Protocol (UDP) port for transfer of audio and video data. In spite of the popularity of Skype, relatively little is known about its traffic characteristics. In this paper, the sender is sending the audio visual data using UDP port at a constant bit rate (CBR). The destination receives the data and checks with its buffer threshold values. The minimum and maximum threshold values are fixed based on the receiver buffer. When the sender data is higher than the threshold value, the destination asks source to reduce the flow rate by sending an explicit control packet. When the sender rate is lower than the threshold value, the destination can ask the source to increase the sending rate. The introduction of feedback system using a control message overcomes the congestion at the receiver, minimizes the data loss, increases optimal utilization of resources, and enhances the quality of expectation. In Skype application, an ordinary node acts one time as a sender and other time as a receiver. The proposed technique is to be built at both the end nodes. Important quality parameters such as packet loss due to congestion, one-way packet delay, effect of queuing delay on sender performance of feedback are analyzed using graphs and statistical data. Mathematical models are used to analyze the Skype performance. MATLAB software is used to simulate the system and for model authentication.


Skype Audio Video UDP Feedback VoIP 


  1. 1.
    Carlucci, G., De Cicco, L., Holmer, S., & Mascolo, S. (2017). Congestion control for web real-time communication. IEEE/ACM Transactions on Networking, pp. 1063–6692 © 2017, IEEE.Google Scholar
  2. 2.
    Kumara, W. G. C. W., Jayasekara, J. M. N. D. B., & Gunarathne, T. (2013). Video quality and traffic characteristics of Skype video calls in WAN. In SAITM Research Symposium on Engineering Advancements.Google Scholar
  3. 3.
    Zhang, X., Xu, Y., Hu, H., Liu, Y., Guo, Z., & Wang, Y. (2012). Profiling Skype video calls: Rate control and video quality (p. 100871). Institute of Computer Science & Technology: Peking University, Beijing.Google Scholar
  4. 4.
    Santiago del Río, P. M., Ramos, J., García-Dorado, J. L., & Aracil, J. (2011). On the processing time for detection of Skype traffic. 978-1-4244-9538-2/11/$26.00 c, IEEE.Google Scholar
  5. 5.
    Molnár, S., & Perényi, M. (2011). On the identification and analysis of Skype traffic. International Journal of communication systems, 24(1), 94–117. Wiley & Sons, Ltd.CrossRefGoogle Scholar
  6. 6.
    Bonfiglio, D., Mellia, M., Meo, M., & Rossi, D. (2009). Detailed analysis of Skype traffic. IEEE Transactions on Multimedia, 11(1), 117–127.CrossRefGoogle Scholar
  7. 7.
    Xie, H., & Yang, Y. R. (2007). A measurement based study of the Skype peer to peer VoIP performance. Computer Science Department, Yale University.Google Scholar
  8. 8.
    Guha, S., Daswani, N., & Jain, R. (2006). An experimental study of the Skype peer-to-peer VoIP system. USA: Cornell University.Google Scholar
  9. 9.
    Baset, S. A., & Schulzrinne, H. An analysis of the Skype peer-to-peer internet telephony protocol. Department of Computer Science, Columbia University, New York NY 10027.Google Scholar
  10. 10.
    Goudru, N. G., & Vijaya Kumar, B. P. (2016). Enhancement of performance of TCP using normalized throughput gradient in wireless networks. Journal of Information and Computing Science (JIC) (published by World Academic Press, World Academic Union, England, UK), 11(3), 214–234.Google Scholar

Copyright information

© Springer Nature Singapore Pte Ltd. 2019

Authors and Affiliations

  1. 1.Department of ISENitte Meenakshi Institute of Technology (Affiliated to Visvesvaraya Technological University)BangaloreIndia

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