The problem of how to provide, in a cost-efficient manner, high levels of availability and service differentiation in communication networks was investigated in Tipper (Telecommun Syst 56(1): 5–16 2014), Gomes et al. (2014), and Alashaikh et al. (Comput Netw 82:4–19 2015). The strategy adopted was to embed in the physical layer topology a high availability set of links and nodes (termed the “spine”). The spine enables through protection, routing, and cross-layer mapping, the provisioning of differentiated classes of resilience with varying levels of end-to-end availability. Here, we present an optimization model formulation of the spine design problem, considering link availability and the cost of upgrading link availability. The design problem seeks to minimize the cost while attaining a desired target flow availability. Extensive numerical results illustrate the benefits of modifying the availability of a subset of links of the network to implement quality of resilience classes.
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T. Gomes was partially supported by Fundação para a Ciência e a Tecnologia (FCT) under project grant UID/Multi/ 00308/2019 and was financially supported by FEDER Funds and National Funds through FCT under project CENTRO-01-0145-FEDER-029312. This paper is also based upon work from COST Action CA15127 (“Resilient communication services protecting end-user appli- cations from disaster-based failures – RECODIS”) supported by COST (European Cooperation in Science and Technology).
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Alashaikh, A., Tipper, D. & Gomes, T. Embedded network design to support availability differentiation. Ann. Telecommun. 74, 605–623 (2019). https://doi.org/10.1007/s12243-019-00730-w
- Crosslayer mapping
- Differentiated services
- Flow availability