Network Virtualization Over Elastic Optical Networks With Different Protection Schemes

Assis, K. D. R.; Peng, Shuping; Almeida, Raul C.; Waldman, Hélio; Hammad, Ali; Santos, Alex Ferreira dos; Simeonidou, Dimitra

doi:10.1364/jocn.8.000272

Cited by 36 publications

(41 citation statements)

References 16 publications

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“…To save network resources, a number of research studies considered a weaker form of protection, called bandwidth squeezing, where only a reduced bandwidth is guaranteed after a failure, according to a given BSR [7]- [11], [30]. The advantages of using bandwidth squeezing can be amplified when combined with virtual link demand splitting over multiple disjoint substrate paths [7], [11], [31]. The latter is commonly known as survivable multi-path provisioning [12], [13], [30], [31].…”

Section: Related Workmentioning

confidence: 99%

“…In this paper, we propose a VN embedding solution with dedicated protection that incorporates two techniques to decrease the network-resource consumption: (i) bandwidth squeezing, i.e., the opportunity to tune the amount of bandwidth guaranteed in case of failures [7]- [11]; and (ii) survivable multi-path provisioning [12], [13], i.e., VLink demand splitting over multiple disjoint paths. Bandwidth squeezing is motivated by the fact that not all services require the full bandwidth to be operational, e.g., a file transfer service can still be operational with reduced bandwidth during a failure.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Reliable Slicing of 5G Transport Networks with Dedicated Protection

Shahriar

Taeb

Chowdhury

et al. 2019

2019 15th International Conference on Network and Service Management (CNSM)

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In 5G networks, slicing allows partitioning of network resources to meet stringent end-to-end service requirements across multiple network segments, from access to transport. These requirements are shaping technical evolution in each of these segments. In particular, the transport segment is currently evolving in the direction of the so-called elastic optical networks (EONs), a new generation of optical networks supporting a flexible optical-spectrum grid and novel elastic transponder capabilities. In this paper, we focus on the reliability of 5G transport-network slices in EON. Specifically, we consider the problem of slicing 5G transport networks, i.e., establishing virtual networks on 5G transport, while providing dedicated protection. As dedicated protection requires a large amount of backup resources, our proposed solution incorporates two techniques to reduce backup resources: (i) bandwidth squeezing, i.e., providing a reduced protection bandwidth with respect to the original request; and (ii) survivable multi-path provisioning. We leverage the capability of EONs to fine tune spectrum allocation and adapt modulation format and Forward Error Correction (FEC) for allocating rightsize spectrum resources to network slices. Our numerical evaluation over realistic case-study network topologies quantifies the spectrum savings achieved by employing EON over traditional fixed-grid optical networks, and provides new insights on the impact of bandwidth squeezing and multi-path provisioning on spectrum utilization.

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Section: Related Workmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Reliable Slicing of 5G Transport Networks with Dedicated Protection

Shahriar

Taeb

Chowdhury

et al. 2019

2019 15th International Conference on Network and Service Management (CNSM)

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“…The studies [318]- [320] have examined so-called bandwidth squeezed restoration for virtual topologies. With bandwidth squeezing, the back-up path bandwidths of the surviving virtual topologies are generally lower than the bandwidths on the working paths.…”

Section: Virtualizationmentioning

confidence: 99%

Software Defined Optical Networks (SDONs): A Comprehensive Survey

Thyagaturu

Mercian

McGarry

et al. 2016

IEEE Commun. Surv. Tutorials

283

114

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The emerging Software Defined Networking (SDN) paradigm separates the data plane from the control plane and centralizes network control in an SDN controller. Applications interact with controllers to implement network services, such as network transport with Quality of Service (QoS). SDN facilitates the virtualization of network functions so that multiple virtual networks can operate over a given installed physical network infrastructure. Due to the specific characteristics of optical (photonic) communication components and the high optical transmission capacities, SDN based optical networking poses particular challenges, but holds also great potential. In this article, we comprehensively survey studies that examine the SDN paradigm in optical networks; in brief, we survey the area of Software Defined Optical Networks (SDONs). We mainly organize the SDON studies into studies focused on the infrastructure layer, the control layer, and the application layer. Moreover, we cover SDON studies focused on network virtualization, as well as SDON studies focused on the orchestration of multilayer and multidomain networking. Based on the survey, we identify open challenges for SDONs and outline future directions

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“…Maximizing the traffic carried by the physical network due to the established virtual networks has also been the objective of some algorithms [54,[57][58][59]. As with the blocking ratio, the value of this performance metric depends on the topologies of the physical and virtual networks as well as the capacity of physical nodes/links and capacity requirements of virtual nodes/links, which makes difficult drawing general conclusions about the quality of different algorithms.…”

Section: Performance Metricsmentioning

confidence: 99%

“…0.99999) to a virtual network has not been addressed by the proposed virtual network allocation algorithms to date, although availability (the fraction of time that a service is in operative state) is one of the most important quality of service metrics in a service level agreement (SLA). However, some efforts have been carried out in guaranteeing operation under specific failure conditions [49,53,59,61,62].…”

Section: Performance Metricsmentioning

confidence: 99%

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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Network Virtualization Over Elastic Optical Networks With Different Protection Schemes

Cited by 36 publications

References 16 publications

Reliable Slicing of 5G Transport Networks with Dedicated Protection

Reliable Slicing of 5G Transport Networks with Dedicated Protection

Software Defined Optical Networks (SDONs): A Comprehensive Survey

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

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