Systems and methods for modeling non-visible optical sources in a spectrum controller for control thereof include receiving channel routing information and signal characteristics for the non-visible channels separately from visible channels, wherein the visible channels are formed by optical transceivers communicatively coupled to the spectrum controller and the non-visible channels are formed by optical transceivers without communication to the spectrum controller; utilizing a combination of the channel routing information and signal characteristics for both the visible channels and the non-visible channels as input to the spectrum controller; performing control of optical spectrum based on the input; and providing output adjustments based on the control.

Systems and methods for modeling non-visible optical sources in a spectrum controller for control thereof include receiving channel routing information and signal characteristics for the non-visible channels separately from visible channels, wherein the visible channels are formed by optical transceivers communicatively coupled to the spectrum controller and the non-visible channels are formed by optical transceivers without communication to the spectrum controller; utilizing a combination of the channel routing information and signal characteristics for both the visible channels and the non-visible channels as input to the spectrum controller; performing control of optical spectrum based on the input; and providing output adjustments based on the control.

Methods and systems are provided for determining a shortest minimum regeneration path in an optical network. The method includes creating a virtual node at a source node, the source node communicatively coupled to a destination node through a plurality of nodes and links. The method includes traversing the virtual nodes, wherein traversing the virtual nodes comprises selecting an unvisited virtual node at a node; identifying a candidate virtual node from the unvisited virtual node; determining whether the candidate virtual node exceeds a maximum permitted weight; determining whether the candidate virtual node violates a shortest minimum regeneration path condition; and creating the new virtual node from the candidate virtual node if the candidate virtual node does not exceed the maximum permitted weight and if the candidate virtual node does not violate the shortest minimum regeneration path condition.

A single-wavelength light path is selected between a source access node and a destination access node of a wavelength-division multiplexed optical network, including selecting an illuminated wavelength of the light path and selecting a start time and duration for a data transfer that would not interfere with other data transfers. If no start time/wavelength combination is available with duration sufficient to transport the data, an additional wavelength is automatically selected, based on modeling, that would not impair traffic being carried by other wavelengths in the network, and without a time-consuming manual process of the prior art. The scheduling process may include selecting a set of optical fibers, a wavelength, a start time and an end time to transport proposed traffic. A novel scheduler avoids checking every possible start time, thereby saving significant processing time. The scheduler schedules single-wavelength light paths, rather than relying on complex wavelength shifting schemes.

There is provided a network management device to manage a network on which an existing optical path is operated, the network management device including: a first receiver configured to receive data related to a measurement result of signal quality of a first optical signal having a first wavelength on the existing optical path; a second receiver configured to receive a request for adding a second optical signal having a second wavelength to the existing optical path; at least one memory configured to store a procedure; and at least one processor configured to execute the procedure of estimating a variation quantity in the signal quality of the first optical signal when the second optical signal is added to the existing optical path based on the data related to the measurement result, when the request is received, and determining whether to add the second optical signal based on results of the estimating.

Methods and systems may estimate nonlinear penalties for optical paths using spectral inversion in optical transport networks. Certain values of nonlinear transfer functions for nonlinear penalty estimation may be pre-calculated for optical paths between given nodes. When an optical path computation for using spectral inversion between a given source node and a given destination node is desired, the pre-calculated values may be concatenated for improved computational efficiency.

Systems and methods for computing disjoint paths in a network considering continuity constraints include, responsive to a request for disjoint paths in the network which are subject to the continuity constraints, initializing a plurality of variables associated with a graph defining the network where edges constitute nodes and vertices constitute links; determining a first path through the graph; determining an auxiliary directed graph based on the first path; and determining a second path through the auxiliary directed graph, wherein the second path is determined by considering entry into cut edges, exit from cut edges, and a destination in the auxiliary directed graph and the plurality of variables are adjusted based on the entry, the exit, and the destination to address the continuity constraints. This approach concept applies to not just continuity constraints but to any constraints, which are non-additive in nature; the objective function is still additive for Shortest Path First (SPF).

Methods and systems may implement a credit based approach for optimizing optical transmission and calculating optical paths in optical networks.

Methods and systems for embedding VI demands in a software-defined network include mapping virtual nodes over physical nodes in a network topology. An auxiliary graph including virtual links between physical nodes that have a residual capacity sufficient to meet a virtual infrastructure demand is constructed. Virtual links over physical links are mapped to maximize use of existing optical channels and to minimize switching of a virtual link between a wavelength division multiplexing layer and an IP layer. New optical channels with a maximum spectral efficiency are established. A set of potential solutions for embedding a set of virtual infrastructure demands is determined. A solution is selected from the set of potential solutions that maximizes a weighted average of spectrum needed to support the set of virtual infrastructure demands and a cost of provisioning the virtual infrastructure demands.

The present invention provides a fiber deployment method, storage medium, electronic device and system. The fiber deployment method includes the following steps: S10, traversing all single-mode fiber links and selecting a link for ultra-low loss fiber upgrade with the objective of minimizing the maximum number of frequency slots used in the whole network; and S20, when both an ultra-low loss fiber and a single-mode fiber satisfy the service demand, using preferentially spectrum resources in the single-mode fiber. The fiber deployment method of the present invention is simple and feasible. It allows a more efficient fiber upgrade strategy and more reasonable spectrum resource allocation and can make full use of the existing single-mode fibers in the elastic optical network, thereby allowing more efficient resource utilization.