Demonstrations of Efficient Online Spectrum Defragmentation in Software-Defined Elastic Optical Networks

Chen, Cen; Chen, Xiaoliang; Zhang, Mingyang; Ma, Shoujiang; Shao, Yan; Li, Suoheng; Suleiman, Munir Said; Zhu, Zuqing

doi:10.1109/jlt.2014.2364515

Cited by 49 publications

(5 citation statements)

References 34 publications

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“…To decrease spectrum fragmentation, some dynamic systems reconfigure the established connections. Several works have evaluated the impact of reconfiguration on point-to-point connections on flexible-grid optical networks [68][69][70][71][72]. As expected, reconfiguration decreases blocking [54] at the expense of higher complexity of the control plane.…”

Section: Service Naturementioning

confidence: 92%

“…To decrease the spectrum fragmentation, the re-allocation of FSUs to the different channels in a link has been proposed in the area of flexible-grid networks by Refs. [68][69][70][71][72]. In Ref.…”

Section: Optical Fiber and Wireless Communicationsmentioning

confidence: 99%

“…In Refs. [69][70][71], pro-active reconfiguration algorithms are presented for point-topoint connections over flexible-grid optical networks. Reconfiguration may take place every time a given number of virtual networks request has been received.…”

Section: Service Naturementioning

confidence: 99%

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Network Virtualization Over Elastic Optical Networks: A Survey of Allocation Algorithms

Bórquez‐Paredes¹,

Beghelli²,

Leiva³

2017

Optical Fiber and Wireless Communications

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Network virtualization has emerged as a paradigm for cloud computing services by providing key functionalities such as abstraction of network resources kept hidden to the cloud service user, isolation of different cloud computing applications, flexibility in terms of resources granularity, and on-demand setup/teardown of service. In parallel, flex-grid (also known as elastic) optical networks have become an alternative to deal with the constant traffic growth. These advances have triggered research on network virtualization over flex-grid optical networks. Effort has been focused on the design of flexible and virtualized devices, on the definition of network architectures and on virtual network allocation algorithms. In this chapter, a survey on the virtual network allocation algorithms over flexible-grid networks is presented. Proposals are classified according to a taxonomy made of three main categories: performance metrics, operation conditions and the type of service offered to users. Based on such classification, this work also identifies open research areas as multi-objective optimization approaches, distributed architectures, meta-heuristics, reconfiguration and protection mechanisms for virtual networks over elastic optical networks.under the conditions stated in a service level agreement (SLA), having dynamic scaling of resources and transparent access to network services, unaware of the location and hardware/ software characteristics of the required resources [2]. Apart from high bandwidth, cloud computing applications require the following functionalities from the underlying physical network [1]:• Abstraction: The technology/implementation specific details of the physical network resources are hidden to the users, due to the "computing as a utility" philosophy.• Isolation: Different cloud computing applications should not interfere with each other in the access to common physical resources.• Flexible resource granularity: The amount of resources (storage, processing power and bandwidth) required by different cloud computing applications might vary significantly.• On-demand setup/tear down: For efficiency, network resources should be set-up/torn down with a highly dynamic, rapidly reconfigurable and programmable network environment, something not possible with the current status of Internet [3].• Resiliency: Grid/cloud computing applications should continue running in spite of failures affecting the optical network.Network virtualization, which extends the well-known concepts of server and storage virtualization to networks, is envisaged as a key enabling technology for cloud computing services.As such, the benefits of running cloud applications on top of virtual networks (as opposed to on top of virtual servers alone, as usually done [4,5]), was evidenced by several preliminary studies on network virtualization for cloud computing. In Ref.[6], resource allocation of cloud-based data centres services was proposed by abstracting the service requests as virtual network requests. In Ref.[7], a network virt...

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Section: Service Naturementioning

confidence: 92%

Section: Optical Fiber and Wireless Communicationsmentioning

confidence: 99%

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Network Virtualization Over Elastic Optical Networks: A Survey of Allocation Algorithms

Bórquez‐Paredes¹,

Beghelli²,

Leiva³

2017

Optical Fiber and Wireless Communications

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“…The key is tighter integration of the optical layer and service layer. Considering recent progress in optical network control and management such as software-defined networking (SDN) [19] and OpenFlow [20], we can develop optical network control triggered by network services and applications. However, the granularity and scalability of service-layer control are totally different from the optical layer.…”

Section: Evolution Of Network Architecturementioning

confidence: 99%

Recent Progress in Optical Network Design and Control towards Human-Centered Smart Society

MIYAMURA,

MISAWA

2024

IEICE Trans. Commun.

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In this paper, we investigate the evolution of an optical network architecture and discuss the future direction of research on optical network design and control. We review existing research on optical network design and control and present some open challenges. One of the important open challenges lies in multilayer resource optimization including IT and optical network resources. We propose an adaptive joint optimization method of IT resources and optical spectrum under time-varying traffic demand in optical networks while avoiding an increase in operation cost. We formulate the problem as mixed integer linear programming and then quantitatively evaluate the trade-off relationship between the optimality of reconfiguration and operation cost. We demonstrate that we can achieve sufficient network performance through the adaptive joint optimization while suppressing an increase in operation cost.

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“…The 'packet-matching function' and forwarding rules for the OpenFlow switch are programmed by using the OpenFlow controller. The set of standard messages that are exchanged between the OpenFlow switch and the OpenFlow controller are defined using OpenFlow protocol [13] [14]. Those messages allow the controller to program the behavior in the switch Fig.…”

Section: Flow Table Matching Approach In Sdnmentioning

confidence: 99%

Match Field based Algorithm Selection Approach in Hybrid SDN and PCE Based Optical Networks

Selvaraj¹,

Nagarajan²

2018

KSII TIIS

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The evolving internet-based services demand high-speed data transmission in conjunction with scalability. The next generation optical network has to exploit artificial intelligence and cognitive techniques to cope with the emerging requirements. This work proposes a novel way to solve the dynamic provisioning problem in optical network. The provisioning in optical network involves the computation of routes and the reservation of wavelenghs (Routing and Wavelength assignment-RWA). This is an extensively studied multi-objective optimization problem and its complexity is known to be NP-Complete. As the exact algorithms incurs more running time, the heuristic based approaches have been widely preferred to solve this problem. Recently the software-defined networking has impacted the way the optical pipes are configured and monitored. This work proposes the dynamic selection of path computation algorithms in response to the changing service requirements and network scenarios. A software-defined controller mechanism with a novel packet matching feature was proposed to dynamically match the traffic demands with the appropriate algorithm. A software-defined controller with Path Computation Element-PCE was created in the ONOS tool. A simulation study was performed with the case study of dynamic path establishment in ONOS-Open Network Operating System based software defined controller environment. A java based NOX controller was configured with a parent path computation element. The child path computation elements were configured with different path computation algorithms under the control of the parent path computation element. The use case of dynamic bulk path creation was considered. The algorithm selection method is compared with the existing single algorithm based method and the results are analyzed.

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Demonstrations of Efficient Online Spectrum Defragmentation in Software-Defined Elastic Optical Networks

Cited by 49 publications

References 34 publications

Network Virtualization Over Elastic Optical Networks: A Survey of Allocation Algorithms

Network Virtualization Over Elastic Optical Networks: A Survey of Allocation Algorithms

Recent Progress in Optical Network Design and Control towards Human-Centered Smart Society

Match Field based Algorithm Selection Approach in Hybrid SDN and PCE Based Optical Networks

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