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Estimation of Network Parameters for use in Congestion Control Algorithm

Azimi, Arvin | 2013

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 45030 (19)
  4. University: Sharif University of Technology
  5. Department: Computer Engineering
  6. Advisor(s): Jahangir, Amir Hossein
  7. Abstract:
  8. Many congestion control protocols proposed so far to alleviate the problems encountered by TCP protocol in high-speed networks and wireless links have to estimate the parameters of the network. For example, the TCP WESTWOOD congestion window is adjusted based on available bandwidth estimation, or TCP Vegas detects the congestion status based on RTT (Round Trip Time) estimation, and XCP protocol operates according to network traffic load. In this paper, we proposed a novel estimation algorithm that is based on burst identification techniques in router. we show through analysis and simulation that during burst periods this method can estimate the congestion window size of the specific flow causing the burst; we call it the effective flow in this project. As one of applications of this method one can estimate the effective number of users utilizing each link. The algorithm does not require maintenance of per-flow states within the network or additional fields in the packet header. The estimation scheme is designed independently from the control functions of the protocols and is thus universal in the sense that is operates effectively in a number of congestion control protocols. It can thus be successfully used in the design of new congestion control protocols
  9. Keywords:
  10. Estimating ; Network Traffic ; Availabe Bandwidth ; Transmission Control Protocol (TCP)Congestion Window ; Congestion Control

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