Virtual topology mapping in elastic optical networks

Zhao, Jun; Subramaniam, Suresh; Brandt-Pearce, Maïté

doi:10.1109/icc.2013.6655167

Cited by 49 publications

(39 citation statements)

References 10 publications

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“…The process of mapping virtual nodes/links to substrate nodes/links is called Virtual Network Embedding (VNE). Recently, the VNE problem in EONs, SLICE or Flex-Grids networks has received attention from the research communities [7]- [10]. 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.…”

Section: Introductionmentioning

confidence: 99%

“…Recently, the VNE problem in EONs, SLICE or Flex-Grids networks has received attention from the research communities [7]- [10]. 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.…”

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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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: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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%

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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“…The process of constructing VONs is called virtual optical network embedding (VONE) [3]. Although the VONE problem over WDM networks has been lucubrated [4], the VONE problem over EONs is still in the preliminary research stage [5]. It is necessary to consider spectrum continuity constraint and contiguity constraint of the VONE problem over EONs, which is different from the virtual network mapping over WDM networks.…”

Section: Introductionmentioning

confidence: 99%

“…It is necessary to consider spectrum continuity constraint and contiguity constraint of the VONE problem over EONs, which is different from the virtual network mapping over WDM networks. In [5], the authors formulated a virtual network mapping problem for both static and dynamic traffic. In [3], the authors proposed two heuristic algorithms with a layered-auxiliary-graph.…”

Section: Introductionmentioning

confidence: 99%

Resource and load aware mapping algorithm for elastic optical network

Yang

Wang

et al. 2016

IEICE Electron. Express

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To improve the efficiency of network, virtualization has developed by sharing the same physical network's resources for different users and applications. As one of the substrate networks, elastic optical network (EON) is expected to be used for the virtualization due to its flexibility and effectiveness. In this letter, we propose a virtual network mapping algorithm called resource and load aware algorithm based on ant colony optimization (RL-ACO), which considers the load jointly with spectrum continuity and spectrum contiguity during the node mapping stage. The variation of node availability rank is defined in the process of link mapping which helps to decrease the blocking ratio of virtual network requests. Simulation results show that RL-ACO not only reduces the blocking probability and the occupied frequency slots, but also balances the link load.

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Virtual topology mapping in elastic optical networks

Cited by 49 publications

References 10 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

Resource and load aware mapping algorithm for elastic optical network

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