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Implementation and Assessment of Pre-reservation Mechanism for PCE Environments

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Abstract

Path computation element (PCE) architecture has been defined for different scenarios such as multi-layer and multi-domain. PCE computes the routes based on the information in the traffic engineering database (TED). TED is updated with the control plane information. However, resource status in the network elements may differ from the information in the TED, because there is a delay from the network element reserves a resource, until the TED is updated. Therefore, PCE can reply with resources, which are busy leading to extra blocking. Pre-reservation mechanism eliminates this blocking, because PCE can book the computed path resources for a certain period as if they were busy. This work demonstrates the importance of this mechanism in two scenarios: multiple PCEs architecture and massive restoration. To do so, we have implemented and tested on a real control plane set-up three schemes to operate with multiple PCEs in a single domain and a massive restoration scenario.

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Acknowledgments

The research leading to these results has received funding from the European Community’s Seventh Framework Programme FP7/2007–2013 under Grant Agreement No. 247674 (STRONGEST project).

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Authors and Affiliations

  1. Telefónica I+D, c/Don Ramón de la Cruz 82-84, Madrid, Spain

    Marta Cuaresma Saturio, Víctor López, Óscar González de Dios, Fernando Muñoz del Nuevo & Juan Pedro Fernández-Palacios

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  1. Marta Cuaresma Saturio
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  2. Víctor López
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  3. Óscar González de Dios
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  4. Fernando Muñoz del Nuevo
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  5. Juan Pedro Fernández-Palacios
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Correspondence to Víctor López.

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Cuaresma Saturio, M., López, V., de Dios, Ó.G. et al. Implementation and Assessment of Pre-reservation Mechanism for PCE Environments. J Netw Syst Manage 22, 488–508 (2014). https://doi.org/10.1007/s10922-013-9296-y

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  • DOI: https://doi.org/10.1007/s10922-013-9296-y

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