Evaluating Availability of Optical Networks Based on Self-Healing Network Function Programmable ROADMs

OSNR Aware Composition of an Open and Disaggregated Optical Node and Network

“…However, this work presents several limitations because the use of MUX/DEMUX and couplers introduce a large number of optical cross-connections and cannot provide power control and power balancing capabilities of the traversing light paths. Besides, up-to-date analyses of functional programmable optical networks commonly rely on a set of assumptions and simplifications to investigate particular metrics such as cost [13] and resiliency [16], or to propose resource allocation policies in SDM networks [17]. However, these works lack of a detailed physical layer modeling and analysis avoiding the optical signal-to-noise ratio (OSNR) impact or power imbalance implications in the AoD design.…”

“…Related work includes an Integer Linear Programming (ILP) formulation and a heuristic for a scalable, effective, and cost-efficient network design [13]; a network-wide resiliency analysis using AoD nodes [16]; a dynamic connection provisioning strategy which exploits AoD idle redundant modules to reduce network blocking [27]; an AoD-based network provisioning scheme accounting on traffic dynamicity [28]; a power-consumption comparison between AoD and ROADM nodes in network scenarios [29]; and SDM networks with AoD-based optical nodes [17]. It is worthwhile to mention that these works report the usefulness of AoD nodes to support both static [16] [16] reports benefits when deploying redundant AoD nodes over doing so in hard-wired ROADMs in terms of operator revenues, mean down times reduction, and redundancy costs reduction. Moreover, note that the economic viability of AoD in a network scenario considering cost aspects is widely analyzed in [13].…”

Programmable filterless network architecture based on optical white boxes

“…Their common objective is to dimension network nodes and perform routing and spectrum assignment to connection requests in a way which minimizes the number of used components. The impact of white box deployment to the availability of connections in the network was evaluated in [19], showing strong reduction in network downtime. Note that in all of these studies, optical white boxes were used to create complex ROADM structures, where the optical backplane interconnects other active components such as SSSs, amplifiers, or sub-wavelength switches.…”

Searching of Optimum Characteristics of Multi-Layer Switching Architecture in All-Optical Networks

“…At the receiver, several parallel frequency sensitive filters can be used to separate the signals from each other. Wavelength division multiplexing (WDM) is an emerging technology for increasing the bandwidth of optical networks [10], [12].…”

“…In multilayer WDM networks, traffic is carried over optical fiber connections which occupy a wavelength in each traversed fiber and terminates at an optical-to electrical receiver at the destination node [10]- [13]. The connections are optically switched at the intermediate nodes and routing and wavelength assignment mechanisms are drawn on for determining the sequence of optical fibers traversed.…”