On capacity planning for the GMPLS network control plane |
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Authors: | Daniel Morató Javier Aracil Juan Pedro Fernández-Palacios Óscar González de Dios Jesús-Felipe Lobo Poyo |
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Affiliation: | (1) Universidad Pública de Navarra, Campus de Arrosadía s/n, 31006 Pamplona, Spain;(2) Universidad Autónoma de Madrid, Campus de Cantoblanco, 28049 Madrid, Spain;(3) Telefónica I+D, Emilio Vargas 6, 28043 Madrid, Spain;(4) Telefónica S.A., Gran Vía 28, 28013 Madrid, Spain |
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Abstract: | This article presents capacity planning rules for the control plane of all-optical networks featuring GMPLS and RSVP-TE as
a connection setup protocol. As per RSVP standard, a refresh message mechanism is incorporated to RSVP such that the state
is periodically refreshed on a link per link basis. We provide analytical expressions for the bandwidth and buffer sizes to
be provided such that no flows are torn down due to lack of refresh messages. Our findings show that small buffers (several
KBytes) suffice to sustain the signaling load for as much as 400 RSVP flows per link, with the simplest RSVP refresh mechanism
(neither using link bundling nor acknowledgments). On the other hand, we also find the packet drop probability per link for
a given network topology for the case that the flow survival probability is larger than a given threshold. We provide numerical
examples based on the COST 239 european network topology and real RSVP traffic traces from early-commercial switching equipment.
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Keywords: | Optical control plane GMPLS Optical control plane capacity planning |
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