Dynamic transparent virtual network embedding over elastic optical infrastructures

Gong, Lei; Zhao, Wenwen; Wen, Yonggang; Zhu, Zuqing

doi:10.1109/icc.2013.6655086

Cited by 40 publications

(27 citation statements)

References 13 publications

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“…(1) can be used to measure the spectrum consecutiveness since it gives the number of accommodation states for all possible future sub-carrier demands. Hence, the spectrum consecutiveness of all the SFLs attached to a substrate node can be used to indicate the available consecutive sub-carriers connected to the node [11]. However, several issues could arise if the spectrum consecutiveness in Eq.…”

Section: Alignment and Consecutiveness-aware Vne (Act-vne)mentioning

confidence: 99%

“…The authors in [7] propose an Integer Linear Programming (ILP) method and two heuristics for VNE in EONs where multiple virtual nodes can be mapped to the same substrate node. The authors in [11] propose a VNE algorithm to map the virtual nodes and links based on the Layered Auxiliary graph and local information of the substrate nodes. The authors in [10] propose an ILP model and heuristics for VNE in both transparent VON and opague VON.…”

Section: Introductionmentioning

confidence: 99%

“…In this section, we compare the performance of the proposed ACT-VNE, ACT-VNE with RCLM-VNR (denoted by ACT-VNR), and Consecutiveness-aware Local Resource Capacity K-Shortest Path First Fit VNE (denoted by CaLRC-KSP-FF) proposed in [11]. Table I shows the simulation parameters we adopted in a 14-node NSFNET and 20-node ARPANET.…”

mentioning

confidence: 99%

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Virtual network embedding and reconfiguration in elastic optical networks

Shakya

Pradhan

Cao

et al. 2014

2014 IEEE Global Communications Conference

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Abstract-Recent innovations in Network Virtualization and Elastic Optical Networks (EONs) enable flexible deployment of optical networks as a service. However, one open challenge is how to embed Virtual Optical Network (VON) requests onto the physical substrate network to maximize the sharing of physical resources, which is the so called Virtual Network Embedding (VNE) problem. EONs are prone to the fragmentation of spectral resources during the process of routing and spectrum allocation. The fragmentation of spectral resources in the substrate fiber links may lead to the blocking of incoming virtual network requests. This degrades the utilization of the physical resources of the Infrastructure Providers and also, decreases the revenue of the Service Providers. In this paper, we propose a novel virtual network embedding algorithm called Alignment and Consecutiveness-aware Virtual Network Embedding (ACT-VNE), which takes into account the spectrum alignment and relative loss in spectrum consecutiveness when mapping virtual nodes/links onto the physical substrate nodes/links. We also propose a minmax reconfiguration scheme called Relative Consecutiveness Lossaware and Misalignment-aware Virtual Network Reconfiguration (RCLM-VNR) that minimizes relative consecutiveness loss and maximizes alignment with adjacent links when reconfiguring the virtual network. Simulation results show that ACT-VNE and RCLM-VNR yield a lower blocking probability and a higher link utilization ratio, which leads to better utilization of the physical resources and increased revenue.

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Section: Alignment and Consecutiveness-aware Vne (Act-vne)mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Virtual network embedding and reconfiguration in elastic optical networks

Shakya

Pradhan

Cao

et al. 2014

2014 IEEE Global Communications Conference

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“…Most previous papers address the offline version of the problem where all traffic or VON requests are known in advance. Recently, some research such as [17] and [18] have proposed heuristic algorithms to deal with the online composition of VON requests onto an elastic optical network.…”

Section: Related Workmentioning

confidence: 99%

“…In an O-OFDM network, switching and cross connections are realized using bandwidth variable optical cross connects (BV-OXC) [10]. Virtualization of an optical node can be achieved by partitioning of BV-OXC nodes based on their ports and/or the supported frequency range (e.g., a virtual BV-OXC can be mapped into a subset of ports and/or specific bandwidth/frequency slot range of a physical BV-OXC) [18].…”

Section: B O-ofdm-based Optical Network Virtualizationmentioning

confidence: 99%

Cross-Layer Optimization of Network Resource Virtualization in IP Over O-OFDM Networks

Hammad

Nejabati

Simeonidou

2016

J. Opt. Commun. Netw.

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Abstract-Optical orthogonal frequency division multiplexing (O-OFDM) is a promising transport technology for virtualization and bandwidth sharing over highcapacity optical fibers. In this paper, we propose an IP over O-OFDM optical network architecture utilizing network virtualization across IP and optical layers. A design goal of this architecture is to provide dynamicity and flexibility in addition to the high capacity required to support multirate traffic with various quality of service requirements. In this architecture, optimized allocation of optical resources to virtual optical networks that accommodate the traffic of IP networks is considered. O-OFDM is utilized to allocate a set of low-rate contiguous subcarriers to each traffic connection represented by a virtual optical link. In addition, we study virtualization of IP network resources (i.e., routers and bandwidth capacities of links) in order to compose several customized virtual IP networks. Furthermore, coordination between IP and optical network virtualization mechanisms is investigated in order to achieve the required optimization of network resource virtualization across the different domains. For this purpose, a novel replanning approach is proposed and is aimed to adapt the resources allocated for virtual optical networks based on the requirements of an IP layer.

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Upgrade-aware virtual infrastructure mapping in software-defined elastic optical networks

Patel

et al. 2014

Photon Netw Commun

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Dynamic transparent virtual network embedding over elastic optical infrastructures

Cited by 40 publications

References 13 publications

Virtual network embedding and reconfiguration in elastic optical networks

Virtual network embedding and reconfiguration in elastic optical networks

Cross-Layer Optimization of Network Resource Virtualization in IP Over O-OFDM Networks

Upgrade-aware virtual infrastructure mapping in software-defined elastic optical networks

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