Multipath TCP algorithms: theory and design

  • Authors:
  • Qiuyu Peng;Anwar Walid;Steven H. Low

  • Affiliations:
  • Caltech, Pasadena, CA, USA;Bell Labs, Alcatel Lucent, New Providence, NJ, USA;Caltech, Pasadena, CA, USA

  • Venue:
  • Proceedings of the ACM SIGMETRICS/international conference on Measurement and modeling of computer systems
  • Year:
  • 2013

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Abstract

Multi-path TCP (MP-TCP) has the potential to greatly improve application performance by using multiple paths transparently. We propose a fluid model for a large class of MP-TCP algorithms and identify design criteria that guarantee the existence, uniqueness, and stability of system equilibrium. We characterize algorithm parameters for TCP-friendliness and prove an inevitable tradeoff between responsiveness and friendliness. We discuss the implications of these properties on the behavior of existing algorithms and motivate a new design that generalizes existing algorithms. We use ns2 simulations to evaluate the proposed algorithm and illustrate its superior overall performance.