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Cost Comparison of Alternative Architectures for IP-over-Optical Core Networks

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Abstract

We explore alternative architectures to reduce cost of IP-over-optical core networks. We conducted a detailed cost study of three architectures. We start with a Baseline architecture that captures present mode of operations with future traffic projections and utilizes technologies such as Ethernet line-cards and OTN sub-wavelength switching. The next architecture, Streamlined, replaces the hub-and-spoke topology of Baseline with a flat topology and is also more judicious in its restoration design. Our detailed study shows significant cost savings for the Streamlined architecture compared to the Baseline. We reduce the cost further in our third proposed architecture: Ethernet enabled IP core consisting of OTN switches (with and without packet switching) and without any backbone routers or MPLS switches. Our results also demonstrate that we can achieve significant reduction in switching costs but reducing cost of transport remains a significant challenge. This paper is an extended version of our previous work published in (11th international conference on the design of reliable communication networks (DRCN), pp 227–234, 2015).

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Notes

  1. In the rest of the paper, we use BB and BR interchangeably.

  2. Streamline cost is the same as in Fig. 10b.

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Acknowledgments

We acknowledge the support of the DARPA CORONET Program, Contract N00173-08-C-2011. The views, opinions, and/or findings contained in this article are those of the authors and should not be interpreted as representing the official views or policies, either expressed or implied, of DARPA or the Department of Defense. Approved for Public Release, Distribution Unlimited.

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Authors and Affiliations

  1. AT&T Labs - Research, Middletown, NJ, USA

    Weiyi Zhang, Balagangadhar G. Bathula & Rakesh K. Sinha

  2. Network Evolution Strategies, LLC, Middletown, NJ, USA

    Robert Doverspike

  3. Silicon Lightwave Services, LLC, Newark, DE, USA

    Peter Magill

  4. AT&T Labs, Middletown, NJ, 07748, USA

    Aswatnarayan Raghuram & Gagan Choudhury

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  1. Weiyi Zhang
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  2. Balagangadhar G. Bathula
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  3. Rakesh K. Sinha
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  4. Robert Doverspike
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  5. Peter Magill
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  6. Aswatnarayan Raghuram
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  7. Gagan Choudhury
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Corresponding author

Correspondence to Balagangadhar G. Bathula.

Additional information

Robert Doverspike and Peter Magill were employed with AT&T when this work was done.

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Zhang, W., Bathula, B.G., Sinha, R.K. et al. Cost Comparison of Alternative Architectures for IP-over-Optical Core Networks. J Netw Syst Manage 24, 607–628 (2016). https://doi.org/10.1007/s10922-016-9374-z

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  • DOI: https://doi.org/10.1007/s10922-016-9374-z

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