Multi-path TCP: a joint congestion control and routing scheme to exploit path diversity in the internet

  • Authors:
  • Huaizhong Han;Srinivas Shakkottai;C. V. Hollot;R. Srikant;Don Towsley

  • Affiliations:
  • University of Massachusetts, Amherst, MA;University of Illinois at Urbana-Champaign, Urbana, IL;University of Massachusetts, Amherst, MA;University of Illinois at Urbana-Champaign, Urbana, IL;University of Massachusetts, Amherst, MA

  • Venue:
  • IEEE/ACM Transactions on Networking (TON)
  • Year:
  • 2006

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Abstract

We consider the problem of congestion-aware multi-path routing in the Internet. Currently, Internet routing protocols select only a single path between a source and a destination. However, due to many policy routing decisions, single-path routing may limit the achievable throughput. In this paper, we envision a scenario where multi-path routing is enabled in the Internet to take advantage of path diversity. Using minimal congestion feedback signals from the routers, we present a class of algorithms that can be implemented at the sources to stably and optimally split the flow between each source-destination pair. We then show that the connection-level throughput region of such multi-path routing/congestion control algorithms can be larger than that of a single-path congestion control scheme.