Effect of network-coding overhead on end-to-end throughput for multihop wireless networks

  • Authors:
  • Takashi Yazane;Hiroyuki Masuyama;Shoji Kasahara;Yutaka Takahashi

  • Affiliations:
  • Graduate School of Informatics, Kyoto University, Yoshida-honmachi, Sakyo-ku, Kyoto 606-8501, Japan;Graduate School of Informatics, Kyoto University, Yoshida-honmachi, Sakyo-ku, Kyoto 606-8501, Japan;Graduate School of Information Science, Nara Institute of Science and Technology, 8916-5 Takayama, Ikoma, Nara 630-0192, Japan;Graduate School of Informatics, Kyoto University, Yoshida-honmachi, Sakyo-ku, Kyoto 606-8501, Japan

  • Venue:
  • Performance Evaluation
  • Year:
  • 2013

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Abstract

Network coding is expected to improve throughput performance of multihop wireless networks. However, the end-to-end throughput is significantly affected by the coding overhead. This paper considers the impact of the coding overhead on throughput performance for multihop wireless networks. Focusing on a three-node chain topology, we model an intermediate node as a single-server queueing system with two buffers. We construct a discrete-time Markov chain on the epochs where one of nodes starts a packet transmission, analyzing the per-flow throughput. The analysis is validated by simulation. Numerical examples show that a long processing time for coding significantly degrades the per-flow throughput.