An incremental capacity allocation with topology augmentation problem is investigated in this paper to maximize
the backup path provisioned services in WDM mesh networks. To tackle the optimal design problem, an
integer linear programming (ILP) formulation is presented. Numerical results show that all the services can be
provisioned a backup path with little number of new links added to the existing topology.
Backup path reprovisioning and activation planning (RAP) scheme is investigated in survivable WDM mesh
networks providing shared path protection under scheduled traffic. Results show that over 70% dual-failure
restorability benefits are achieved when the RAP is applied.
Performance of a resource-efficient provisioning framework (RPF) is evaluated in this paper in wavelength-continuous optical networks under static traffic. The structure of the survivable routing problem is unraveled by an integer linear programming (ILP) model. Numerical results from direct ILP approaches show that the RPF still achieves more than 10% capacity savings over the traditional provisioning framework when subject to the wavelength-continuity constraint. Next, Resource-Efficient Two-stEp Routing subject to Wavelength-ConTinuity constraint (RETER-WCT) algorithm is developed to overcome the drawback of the ILP approach.
Service differentiated survivable WDM mesh networks providing dedicated path protection and shared path
protection are investigated under scheduled traffic. Scheduled routing with holding-time aware and unaware
are studied for comparison. To tackle the service provisioning problem, an integer linear programming(ILP)
formulation is presented for either situation to find the optimal service provisioning solution for a given set of
traffic demands. Numerical results show that over 48% capacity savings are achieved when the holding-time
knowledge is exploited.
We fabricated ordered ZnO and nanowire arrays in anodic alumina membrane (AAM) by cathodic electrodeposition from a non-aqueous dimethylsulfoxide (DMSO) bath containing zinc chloride and dissolved oxygen. X-ray diffraction (XRD), high-resolution transmission electron microcsopy (HRTEM), and electron diffraction (ED) show that the ZnO nanowires are well crystallized with wurtzite structure. The morphologies and structure of the ZnO nanowires have been characterized by scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The results demonstrate that the ZnO nanowires with diameters of about 60nm are uniformly embedded into the hexagonally ordered nanopores of anodic alumina membrane. A sharp ultraviolet emission at 383nm and visible broad emission bands around 592nm were observed from ZnO nanowire arrays. They originated from the near-band emission due to the recombination of bound excitons and deep level emission due to defects, respectively. The cathodic electrodeposition technique in DMSO is also extended to synthesize CdO nanowire arrays.
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