Abstract
Network coding is able to address output conflicts when fanout splitting is allowed for multicast switching. Hence, it successfully achieves a larger rate region than non-coding approaches in crossbar switches. However, network coding requires large coding buffers and a high computational cost on encoding and decoding. In this paper, we propose a novel Online Network Coding framework called Online NC for multicast switches, which is adaptive to constrained buffers. Moreover, it enjoys a much lower decoding complexity O(n 2) by a Vandermonde matrix based approach, as compared to conventional randomized network coding O(n 3). Our approach realizes online coding with one coding algorithm that synchronizes buffering and coding. Therefore, we significantly reduce requirements on buffer space, while also sustaining high throughputs. We confirm the superior advantages of our contributions using empirical studies.
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Supported by the National 863 Projects of China (2009AA01Z205), the Fund of National Laboratory (P080010), the Natural Science Foundation of China (60872010, 60972016), the Program for New Century Excellent Talents in University (NCET070339), and the Funds for Distinguished Young Scientists of Hubei, China (2009 CDA150).
Communication author: Wang Wei, born in 1982, female, Ph.D. candidate.
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Wang, W., Yu, L., Zhu, G. et al. A novel framework of online network coding for multicast switches with constrained buffers. J. Electron.(China) 28, 460–467 (2011). https://doi.org/10.1007/s11767-012-0621-5
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DOI: https://doi.org/10.1007/s11767-012-0621-5