Network Coding as a WiMAX Link Reliability Mechanism: An Experimental Demonstration

  • Surat Teerapittayanon
  • Kerim Fouli
  • Muriel Médard
  • Marie-José Montpetit
  • Xiaomeng Shi
  • Ivan Seskar
  • Abhimanyu Gosain
Part of the Lecture Notes in Computer Science book series (LNCS, volume 7642)

Abstract

Our demonstration showcases a network-coding (NC)– enabled reliability architecture for next generation wireless networks. Our NC architecture uses a flexible thread-based design, applying systematic intra-session random linear network coding as a packet erasure code at the IP layer. Using GENI WiMAX platforms, a series of point-to-point transmission experiments are conducted to compare NC with Automatic Repeated reQuest (ARQ) and Hybrid ARQ (HARQ). At the application layer, Iperf and UFTP are used to measure throughput, packet loss and file transfer delay. In our selected scenarios, NC offers up to 5.9 times gain in throughput and 5.5 times reduction in file transfer delay, compared to HARQ and joint HARQ/ARQ. Our demonstration hence illustrates that lower-layer redundancy mechanisms such as HARQ and ARQ incur high cost since they operate at the packet-level. Conversely, running NC at higher layers (e.g., IP) amortizes the cost of redundancy over several packets, thus leading to higher efficiency.

Keywords

ARQ GENI HARQ Network Coding WiMAX 

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References

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Copyright information

© Springer-Verlag Berlin Heidelberg 2012

Authors and Affiliations

  • Surat Teerapittayanon
    • 1
  • Kerim Fouli
    • 1
  • Muriel Médard
    • 1
  • Marie-José Montpetit
    • 1
  • Xiaomeng Shi
    • 1
  • Ivan Seskar
    • 2
  • Abhimanyu Gosain
    • 3
  1. 1.Research Laboratory of Electronics (RLE)Massachusetts Institute of Technology (MIT)CambridgeUSA
  2. 2.WINLABRutgers UniversityPiscatawayUSA
  3. 3.Raytheon BBN TechnologiesCambridgeUSA

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