OpenFlow-Assisted Online Defragmentation in Single-/Multi-Domain Software-Defined Elastic Optical Networks [Invited]

Zhu, Zuqing; Chen, Xiaoliang; Chen, Cen; Ma, Shoujiang; Zhang, Mingyang; Liu, Lei; Yoo, S. J. B.

doi:10.1364/jocn.7.0000a7

Cited by 58 publications

(19 citation statements)

References 11 publications

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“…Also, with the architecture of SDONs, several applications, such as data-center service migration [17], spectrum defragmentation [18,19], and advance reservation request provisioning [20], have been studied too. However, none of these studies have addressed the problem of network survivability.…”

Section: Related Workmentioning

confidence: 99%

“…For the situation in which a lightpath needs to traverse the optical switches that are managed by multiple master OF-Cs, e.g., a lightpath from Node 1 to Node 12 in Fig. 1, the master OF-Cs work collaboratively to set it up, with the similar provisioning scheme demonstrated in [19] for multi-domain SD-EONs. A slave OF-C will remain silent if its master OF-C is working.…”

Section: Survivable Control Plane Establishment In Sd-eonsmentioning

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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Section: Related Workmentioning

confidence: 99%

Section: Survivable Control Plane Establishment In Sd-eonsmentioning

confidence: 99%

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

Zhao

Chen

Zhu

et al. 2016

J. Opt. Commun. Netw.

Self Cite

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“…There has been widespread discussion of the phenomenon as well as a wide range of solutions to it [20]. Fragmentation arises when the optical spectrum utilization on the various links in a network is such that, although there are spectral gaps for more traffic, it is difficult to make use of these because they are either too small to support required super-channels, or they are scattered over the C-band, making it impossible to find matching spectrum in multiple links.…”

Section: E Fragmentationmentioning

confidence: 99%

Core Networks in the Flexgrid Era

Lord

Wright

Mitra

2015

J. Lightwave Technol.

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“…The distributed SDN solution [31] is implemented with the cooperation of multiple OpenFlow controllers in multidomain elastic optical networks. It is a fantastic scheme to address the inter-domain service provisioning problem.…”

Section: E Semicentralized Semidistributed Architecturementioning

confidence: 99%

Intelligent Inter-domain Connection Provisioning for Multi-domain Multi-vendor Optical Networks

Liu¹,

Hua²,

Zheng³

et al. 2015

J. Opt. Commun. Netw.

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We propose a semicentralized semidistributed network architecture based on active stateful path computation elements (PCEs) to intelligently provide end-to-end inter-domain connections in multi-domain optical transport networks supplied by different equipment vendors. A novel control entity, called an inter-domain communication control and management element (ICCME), is introduced into the architecture to achieve flexible distributed interdomain control and centralized intra-domain management by integrating with "proactive" and "reactive" stateful capabilities. Inter-domain routing and signaling are completed with the collaboration of multiple ICCMEs in a peer-to-peer manner, which decentralizes highly intensive computation and signaling to multiple ICCMEs. In addition, we put forward a unified inter-domain communication protocol to eliminate the differences in private signaling message formats of various vendors' domains. We report a successful field trial of providing inter-domain connections across a commercial three-domain three-vendor optical transport network. Also, experimental results indicate that ICCMEbased architecture performs better than previous schemes in terms of scalability, i.e., low average routing load of control entities and low average delay in establishing interdomain connections, but results in higher message overhead and blocking probability.

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OpenFlow-Assisted Online Defragmentation in Single-/Multi-Domain Software-Defined Elastic Optical Networks [Invited]

Cited by 58 publications

References 11 publications

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

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

Core Networks in the Flexgrid Era

Intelligent Inter-domain Connection Provisioning for Multi-domain Multi-vendor Optical Networks

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