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Cost-Efficient Traffic Aggregation Employing Cross-Layer Shared Protection

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Abstract

Shared protection/restoration is a promising solution for reducing protection resources and is supported at each layer of the current multi-layer networks. Software-defined networking is expected to reduce equipment cost as well as operational cost by orchestrating these shared protection functionalities. However, although protection resource sharing improves link utilization, it sometimes increases the required equipment. Meanwhile, traffic re-aggregation at each layer is an important technique for low volume traffic to utilize the underlying link capacity more efficiently, but re-aggregation also makes it difficult to share protection resources with traffic at lower layers. In this paper, we present multi-layer network design strategy and method that reduce equipment cost by means of both traffic re-aggregation at each layer and protection resource sharing among multiple service traffic at different layers. The strategy first prioritizes traffic re-aggregation at each layer, and then maximally delegates shared protection to lower layers as long as it does not increase the required capacity at the lower layer. Evaluation results from the example three-layer networks confirm that the proposed method can effectively reduce equipment cost compared to the conventional design method. Cost reduction is achieved by leveraging shared protection functions at multiple layers.

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Authors and Affiliations

  1. Fujitsu Laboratories LTD., 4-1-1 Kamikodanaka, Nakahara-ku, Kawasaki, 211-8588, Japan

    Tomohiro Hashiguchi, Yutaka Takita, Kazuyuki Tajima & Toru Katagiri

Authors
  1. Tomohiro Hashiguchi
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  2. Yutaka Takita
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  3. Kazuyuki Tajima
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  4. Toru Katagiri
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Correspondence to Tomohiro Hashiguchi.

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Hashiguchi, T., Takita, Y., Tajima, K. et al. Cost-Efficient Traffic Aggregation Employing Cross-Layer Shared Protection. J Netw Syst Manage 24, 557–577 (2016). https://doi.org/10.1007/s10922-016-9372-1

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  • DOI: https://doi.org/10.1007/s10922-016-9372-1

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