Backup Path Reprovisioning and Activation Planning with Differentiated Dual-Failure Restorability in WDM Mesh Networks

Konferenz: Photonische Netze - 10. ITG-Fachtagung
04.05.2009 - 05.05.2009 in Leipzig, Germany

Tagungsband: Photonische Netze

Seiten: 5Sprache: EnglischTyp: PDF

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Ni, Wenda; Zhang, Hanyi (Dept. of Electronic Engineering, Tsinghua University, 100084 Beijing, P. R. China)
Ni, Wenda; Schlosser, Michael (Fraunhofer-Institute for Telecommunications, Heinrich-Hertz-Institut, 10587 Berlin, Germany)

A general integer linear programming (ILP) model, which covers all possible second-failure flow recovery cases, is proposed in this paper to capture the structure of the global backup path reprovisioning scheme triggered after the first-failure flow recovery. Backup capacity contention in face of a new failure is resolved by incorporating a priority activation planning process into the model to achieve differentiated dual-failure restorability for two classes of flows. Numerical results show that without increasing the overall network-wide dual-failure non-restorability, the average network-wide dual-failure non-restorability of high class flows is relatively lower than that of low class flows by over 69% with the proposed differentiated backup path reprovisioning and activation planning (RAP) scheme.