Flexible Availability-Aware Differentiated Protection in Software-Defined Elastic Optical Networks

Chen, Xiaoliang; Tornatore, Massimo; Zhu, Shilin; Fan, Jiawei; Zhou, Wenshuang; Chen, Cen; Hu, Daoyun; Liu, Jiang; Zhu, Zuqing

doi:10.1109/jlt.2015.2456152

Cited by 65 publications

(11 citation statements)

References 30 publications

(32 reference statements)

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“…The research related to the protection in EONs applies, among others, path-based methods Chen et al, 2015;Wang et al, 2015) with respect to two spectrum sharing policies: dedicated protection Chen et al, 2015) and shared protection (Wang et al, 2015). Also regarding survivable EONs a majority of papers focus only on unicast flows.…”

Section: Related Workmentioning

confidence: 99%

A column generation technique for routing and spectrum allocation in cloud–ready survivable elastic optical networks

Goścień

Walkowiak

2017

International Journal of Applied Mathematics and Computer Science

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Driven by increasing user requirements and expectations, the fast development of telecommunications networks brings new challenging optimization problems. One of them is routing and spectrum allocation (RSA) of three types of network flows (unicast, anycast, multicast) in elastic optical networks (EONs) implementing dedicated path protection (DPP). In the paper, we model this problem as integer linear programming (ILP) and we introduce two new optimization approaches-a dedicated heuristic algorithm and a column generation (CG)-based method. Then, relying on extensive simulations, we compare algorithm performance with reference methods and evaluate CG efficiency in detail. The results show that the proposed CG method significantly outperforms reference algorithms and achieves results very close to optimal ones (the average distance to optimal results was at most 2.1%).

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Section: Related Workmentioning

confidence: 99%

A column generation technique for routing and spectrum allocation in cloud–ready survivable elastic optical networks

Goścień

Walkowiak

2017

International Journal of Applied Mathematics and Computer Science

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“…However, none of these studies have addressed the problem of network survivability. The work in [13][14][15]21] considered how to improve the data plane resiliency in SDONs and demonstrated several fast and efficient failure recovery mechanisms. Nevertheless, they considered neither the controller failures nor the data plane failures that might affect control channels.…”

Section: Related Workmentioning

confidence: 99%

“…if the union of the n c OF-Cs' slave relevancy sets still covers V then 13 select slave OF-C for each node in V; 14 get slave control channel of each node in V and ensure that it is node-disjoint with the node's master control channel; 15 if one or more slave control channels cannot be found then 16 f lag 0; …”

Section: B Heuristic Algorithmmentioning

confidence: 99%

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Survivable Control Plane Establishment With Live Control Service Backup and Migration in SD-EONs

Zhao

Chen

Zhu

et al. 2016

J. Opt. Commun. Netw.

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It is known that software-defined elastic optical networks (SD-EONs) are programmable and application-aware. However, due to the centralized network control and management, SD-EONs are vulnerable to the network failures that can affect control plane operations. In this paper, we study the problem of survivable control plane establishment (SCPE), i.e., the controller placement and related communication planning for control service backup and migration to protect the control plane of an SD-EON against single node failures. We first propose a novel mutual backup model to improve the survivability of the control plane with high protection efficiency. An integer linear programming (ILP) model is then formulated to solve the SCPE problem with the objective to minimize both the number of deployed OpenFlow controllers (OF-Cs) and the average control channel latency. We also propose a time-efficient heuristic and use simulations to verify that it can obtain similar solutions to those of the ILP. On top of the theoretical investigation, we design and implement the system to facilitate live control service backup and migration with SCPE in an SD-EON control plane testbed. Experimental results demonstrate that the proposed scheme works efficiently, and compared with that using a single OF-C, our scheme achieves much shorter average provisioning latency in dynamic provisioning.Index Terms-Controller placement; Control plane resiliency; Mutual backup; OpenFlow; Software-defined elastic optical networks (SD-EONs).It is known that by decoupling the control and data planes, software-defined networking (SDN) can make the NC&M in optical networks programmable, adaptive, and application-aware [5]. Specifically, software-defined optical networks (SDONs) can typically be realized by leveraging protocols such as the OpenFlow (OF) [6], the network configuration protocol (NETCONF) with YANG as a data modeling language [7], and the path computation element communication protocol (PCEP) [8]. Here, OF is an open standard protocol that incorporates flow-based switching and centralized controller(s) to facilitate software-defined routing, switching, and network management. Moreover, to support software-defined EONs (SD-EONs), the latest OF specification (version 1.5) [6] has included the extensions for identifying flexible-grid optical flows. Hence, by implementing the OF protocol in the control plane, the network operator can manage the data plane elements (i.e., BV-Ts and BV-WSSs) in an EON intelligently with one or more controllers and realize a SD- EON [5,[9][10][11][12].In the meantime, as an optical fiber can carry over Tb/s traffic, ensuring network survivability is vital in optical networks. Hence, researchers have considered the data plane failures in SD-EONs and proposed a few schemes to improve the data plane resiliency [13][14][15]. Note that in a practical SD-EON, the control plane is definitely not failure-proof without specific considerations on the control plane resiliency. For instance, as it counts on the centralized control...

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“…A mathematical model is developed for calculating the availability of a sharedprotected connection in [12] and the problem of provisioning connections cost effectively while satisfying the connections' availability requirements is addressed in optical wavelength-division multiplexing (WDM) meshed networks. A theoretical analysis on service availability in elastic optical networks (EONs) is presented in [13]. An availability-aware differentiated protection (ADP) algorithm and a service availability-aware backup reprovisioning strategy are proposed.…”

Section: Introductionmentioning

confidence: 99%

Improving Network Availability—A Design Perspective

Girão‐Silva

Martins

Gomes

et al. 2018

Advances in Intelligent Systems and Computing

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The availability of the resources in communication networks is critical, due to the impact that possible disruptions of communication services may have in the society. Therefore providing adequate levels of availability for every demand in a network is of paramount importance. In this work, we focus on the topological structure of a network to select a set of links that provide a high availability path to be used by the different end-to-end demands. This set of links constitutes a high availability structure (the spine) and is used as the working path for each demand. The backup path for each demand is edge-disjoint with the corresponding working path. This path pair provides end-to-end protection for critical service demands in the network. An exact formulation of the problem is presented and solved for small instances networks. A heuristic resolution approach with centrality measures is also put forward, with an experimental study comparing the exact and the approximate results.

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Flexible Availability-Aware Differentiated Protection in Software-Defined Elastic Optical Networks

Cited by 65 publications

References 30 publications

A column generation technique for routing and spectrum allocation in cloud–ready survivable elastic optical networks

A column generation technique for routing and spectrum allocation in cloud–ready survivable elastic optical networks

Survivable Control Plane Establishment With Live Control Service Backup and Migration in SD-EONs

Improving Network Availability—A Design Perspective

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