Hybrid Survivability Schemes Achieving High Connection Availability With a Reduced Amount of Backup Resources [Invited]

Ahmed, Jawwad; Çavdar, Çiçek; Monti, Paolo; Wosinska, Lena

doi:10.1364/jocn.5.00a152

Cited by 17 publications

(18 citation statements)

References 24 publications

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“…This way, the assessment of the benefits of introducing the relocation option during the restoration process is performed. This benchmarking approach is based on the solution of an ILP formulation and it is referred to as ILP PR [3].…”

Section: A Simulation Setupmentioning

confidence: 99%

“…These strategies pre-reserve backup resources during the provisioning phase so that they can be made promptly available to recover a cloud service disrupted by a failure. As a result, a cloud service is guaranteed 100% survivability against the failure scenario(s) considered by the protection strategy [3]. This very good resiliency performance comes at the expense of large resource consumption since backup resources are pre-reserved and cannot be used to provision other cloud services.…”

mentioning

confidence: 99%

“…Another option to provide resiliency for cloud services is based on restoration-based techniques [3]. These strategies are reactive and they do not rely on pre-reserved backup resources to recover the cloud services disrupted by a failure.…”

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confidence: 99%

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Restoration in Optical Cloud Networks With Relocation and Services Differentiation

Natalino

Wosinska

Spadaro

et al. 2016

J. Opt. Commun. Netw.

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Abstract-Optical cloud networks allow for the integrated management of both optical and IT resources. In this paradigm, cloud services can be provisioned in an anycast fashion, i.e., only the source node asking for a service is specified, while it is up to the cloud control/management system to select the most suitable destination data center (DC) node. During the cloud service provisioning process resiliency is crucial in order to guarantee continuous network operations also in the presence of failures. On the one hand, a survivability strategy needs to be able to meet the availability requirements of each specific cloud service, while on the other hand it must be efficient in using backup resources. This paper proposes a restoration-based survivability strategy, which combines the benefits of both cloud service relocation and service differentiation concepts. The former is used to enhance the restorability performance (i.e., the percentage of successfully restored cloud services) offered by restoration, while the latter ensures that critical services are given the proper consideration while backup resources are assigned. The paper proposes both an ILP formulation which guarantees optimal results and a heuristic, which trades the optimality of the solution achieved by the ILP for faster processing times. Simulation results show that the average service availability and restorability performance obtained by both the ILP and the heuristic are very close to the one achievable using a protection-based strategy, but with the inherent benefit, in terms of efficient use of resources, offered by a restoration-based approach.

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Section: A Simulation Setupmentioning

confidence: 99%

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confidence: 99%

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Restoration in Optical Cloud Networks With Relocation and Services Differentiation

Natalino

Wosinska

Spadaro

et al. 2016

J. Opt. Commun. Netw.

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“…While most protection approaches consider single component failures, several methods have also been developed to deal with multiple failures [20], [21]. The concept of shared risk groups (SRGs), where multiple network resources are assumed to fail as a group, e.g., fibers sharing the same fiber conduit, has been considered in survivability approaches by ensuring that the working and backup paths are SRG-disjoint [22].…”

Section: Related Workmentioning

confidence: 99%

Attack-Aware Dedicated Path Protection in Optical Networks

Furdek

Skorin-Kapov

Wosinska

2016

J. Lightwave Technol.

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Abstract-Due to the high data rates in optical networks, physical-layer attacks targeting service degradation, such as power jamming, can potentially lead to large data and revenue losses. Conventional network survivability approaches which establish link-disjoint working and backup paths to protect from component faults may not provide adequate protection for such attacks. Namely, the working and the backup paths, although link-disjoint, might both be affected by a single attack scenario due to specific attack propagation characteristics. To enhance the existing survivability approaches, we utilize the concept of an attack group (AG) which incorporates these characteristics to identify connections which can simultaneously be affected by a single attack. We apply this concept to dedicated path protection (DPP) and develop attack-aware DPP (AA-DPP) approaches which aim to establish AG-disjoint primary and backup paths in a cost-effective manner. We provide a two-step ILP formulation for the routing and wavelength assignment of the working and backup paths, as well as a heuristic for larger problem instances. Numerical results indicate that the proposed approaches provide dedicated path protection schemes with enhanced attack protection without using more resources (i.e., wavelengths, average path lengths) than standard DPP methods.

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“…In [11], authors proposed a hybrid scheme to achieve high connection availability with low backup resources in double link failure scenario. The hybrid scheme is based on backup re-provisioning, path restoration and 1:1 dedicated path protection.…”

Section: Related Workmentioning

confidence: 99%

Availability analysis of resilient geometric routing on Internet topology

Sahhaf

Tavernier

Colle

et al. 2014

2014 10th International Conference on the Design of Reliable Communication Networks (DRCN)

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Abstract-Scalable routing schemes for large-scale networks, especially future Internet, are required. Geometric routing scheme is a promising candidate to solve the scalability issue of routing tables in conventional IP routing based on longest prefix matching. In this scheme, network nodes are assigned virtual coordinates and packets are forwarded towards their intended destination following a distance-decreasing policy. Dynamics in the network such as node/link failures might affect this forwarding and lead packets to a dead end. We proposed recovery techniques in geometric routing to deliver packets to the destination in case of failures. In this paper, we perform an analysis on the availability of the proposed protection techniques on the Internet graph. The routing scheme over optical transport network is considered and the reliability data of physical components and a known network availability model are used. This evaluation is compared with the shortest cycle scheme which finds two node disjoint paths between every source and destination in the topology and also with geometric routing with no protection. The results show that the proposed scheme performs reasonably well compared to the shortest cycle scheme and significantly enhances the availability compared to geometric routing without any protection.

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Hybrid Survivability Schemes Achieving High Connection Availability With a Reduced Amount of Backup Resources [Invited]

Cited by 17 publications

References 24 publications

Restoration in Optical Cloud Networks With Relocation and Services Differentiation

Restoration in Optical Cloud Networks With Relocation and Services Differentiation

Attack-Aware Dedicated Path Protection in Optical Networks

Availability analysis of resilient geometric routing on Internet topology

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