Routing, Modulation, and Spectrum Assignment in Programmable Networks Based on Optical White Boxes

Abedifar, Vahid; Furdek, Marija; Muhammad, Ajmal; Eshghi, Mohammad; Wosinska, Lena

doi:10.1364/jocn.10.000723

Cited by 12 publications

(4 citation statements)

References 27 publications

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“…While the single-vendor solution provides optimal performance, disaggregation is demonstrated to be effective in multi-domain deployments, while in single-domain the introduction of additional OEO interfaces may impact its attractivity [7]. Routing and spectrum assignment in white box based on the architecture-on-demand framework have been proposed and evaluated taking into account the number of components used for a connection, the spectrum usage and the path length [18]. The activities carried out by the Telecom Infra Project (TIP), and in particular by the Open Optical and Packet Transport (OOPT) sub-group have resulted in the availability of different open transponder platforms, such as Voyager, Cassini, and Apollo [19].…”

Section: Related Work On White Box Disaggregationmentioning

confidence: 99%

OpenConfig and OpenROADM Automation of Operational Modes in Disaggregated Optical Networks

et al. 2020

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OpenConfig and OpenROADM are emerging as the most relevant initiatives to support partial disaggregation, in which the optical line system is provided by a single vendor while transponders can be provided, in pairs, by different vendors. This way, vendor lock-in is eliminated at the transponder level, without significantly impacting the transmission performance. Although the above initiatives have defined YANG models reaching a good level of maturity, there are still open issues that prevent the full deployment of vendor-neutral partially disaggregated solutions. Among these, the candidate transmission modes in a transponder, including proprietary solutions, are exposed in the YANG models as opaque attributes called Operational (OP) Modes, thus limiting the awareness and the effectiveness of the SDN controller in the selection of the most appropriate transmission mode. In this work, we focus on the open issues related to the configuration and adaptation of transmission parameters. In particular, we focus on the OpenConfig concept of OP Mode enabling the abstraction of transmission complexity but currently preventing an SDN controller to manage transponders in a fully vendor-neutral way. This work first estimates, through a simulative study, the network performance benefit that is achievable by optimizing the OP mode selection. Then, a telemetry-based automated solution is proposed, designed and implemented to enhance the OP mode concept in case of both provisioning and adaptation scenarios (e.g., upon failure), also considering the impact in the tributary/client network. In particular, the following components have been designed and implemented: (i) software agent for OpenConfig transponders; (ii) software agent for OpenROADM line systems, (iii) an automatic telemetryassisted monitoring handler; and (iv) SDN control procedures implemented in the ONOS Controller. The proposed components and comprehensive solution have been evaluated in a network testbed encompassing multi-vendor network elements, successfully demonstrating a full vendor-neutral partially disaggregated provisioning and recovery operations.

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Section: Related Work On White Box Disaggregationmentioning

confidence: 99%

OpenConfig and OpenROADM Automation of Operational Modes in Disaggregated Optical Networks

et al. 2020

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“…Additionally, considering different modulation methods and spectrum fragment-aware, resource utilization, [18]- [20] proposed various of routing algorithms in the elastic optical networks, without considering balancing risk of the networking, however. Actually, the network balancing risk is not only related with the distribution of carried services but also the underlying network structure.…”

Section: Related Work a Routing Algorithms In Optical Networkmentioning

confidence: 99%

Risk-Aware Service Routes Planning for System Protection Communication Networks of Software-Defined Networking in Energy Internet

Liu

Qiu

et al. 2020

IEEE Access

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“…This paper presents a study through mixed-integer linear programming (MILP) and heuristics of how to map virtual topologies on an optical elastic substrate network, subject to certain constraints to such topologies, notably the flow conservation and spectrum continuity and contiguity on the routing and spectrum assignment (RSA) problem [8]. Modulation format constraints and substrate resources (nodes and links) constraints are also considered [9,10].…”

Section: Introductionmentioning

confidence: 99%

Virtualization of elastic optical networks and regenerators with traffic grooming

Assis

Santos

Almeida

et al. 2020

J. Opt. Commun. Netw.

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An elastic optical network (EON) plays an important role in transport technology for virtualization of networks.A key aspect of EONs is to establish lightpaths (virtual links) with exactly the amount of spectrum that is needed and with the possibility of grooming, the process of grouping many small traffic flows into larger units, creating a super-lightpath. Grooming eliminates the need for many guard bands between lightpaths and also saves transceivers; however, it often leads to the need to perform O/E/O conversions to multiple-data-rate optical signals at intermediate nodes. The aim of this paper is to provide a mixed-integer linear programming (MILP) formulation, as well as heuristic and meta-heuristic approaches, for the design of multiple virtual optical networks (VONs) in an elastic optical substrate network with bandwidth-variable lightpaths, modulation format constraints and virtual elastic regenerator placement. Traffic grooming is allowed inside each VON and a distance-adaptive modulation-format technique is employed to guarantee efficiency in terms of bandwidth for a physical substrate, subject to several virtual topologies. A reduced (EQ2) MILP formulation without grooming capability is also proposed for comparison. The complete MILP formulation jointly solves the virtual topology design, the regenerator placement, grooming as well as the routing, modulation and spectrum assignment (RMSA) problems. The reduced (EQ2) MILP formulation, heuristics and meta-heuristic, on the other hand, separate the virtual topology design problem from the RMSA problem. It is shown that the grooming approach can provide good results, since it solves the problem for a complete design when compared to the approach without grooming. Furthermore, heuristic solutions for large networks are proposed, which present good performance (in terms of saving spectrum) for the design with large instances.

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Routing, Modulation, and Spectrum Assignment in Programmable Networks Based on Optical White Boxes

Cited by 12 publications

References 27 publications

OpenConfig and OpenROADM Automation of Operational Modes in Disaggregated Optical Networks

OpenConfig and OpenROADM Automation of Operational Modes in Disaggregated Optical Networks

Risk-Aware Service Routes Planning for System Protection Communication Networks of Software-Defined Networking in Energy Internet

Virtualization of elastic optical networks and regenerators with traffic grooming

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