Application-Centric Dynamic Multi-layer Resource Allocation in Availability-aware SDN-Orchestrated Networks

Rožić, Ćiril; Savi, Marco; Matrakidis, C.; Klonidis, Dimitrios; Siracusa, Domenico; Tomkos, Ioannis

doi:10.1109/ecoc.2017.8345992

Cited by 2 publications

(1 citation statement)

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“…Note that our restoration algorithm is fully reactive, i.e., no resources is pre-planned for backup paths before that restoration is triggered by a failure. Pre-planning of resources to increase availability and further reduce service downtime has been tackled in our previous work [46].…”

Section: Description Of the Algorithmmentioning

confidence: 99%

Application-aware service provisioning and restoration in SDN-based multi-layer transport networks

Savi

Siracusa

2018

Optical Switching and Networking

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Future 5G networks will run into the massive spread of applications with diverse and stringent requirements in terms of latency, reliability and security. Current multi-layer transport networks lack coordination between their constituent IP/MPLS and optical layers, and thus cannot provide to applications a full service differentiation all the way down to the optical layer. This limitation can be overcome by the adoption of a Software-Defined Network (SDN) orchestrator between the underlying multi-layer transport network and the applications, with the aim of offering them tailored network connectivity and minimizing network resources' consumption. The orchestrator must thus be able to dynamically compute multi-layer paths and allocate optical and IP/MPLS resources in an application-aware fashion (i.e, to meet applications' requirements), both when applications require service provisioning for the first time and when their connectivity must be restored after any network failure. In this paper, we propose a novel auxiliary-graph-based application-aware service provisioning algorithm, able to dynamically provision applications' service requests at runtime according to their needs. Simulations show that, unlike a benchmark application-unaware algorithm, it prevents the violation of application requirements (in terms of bandwidth, latency and availability) while guaranteeing a similar blocking probability. Following the same principles, we then propose an application-aware restoration algorithm, where fine-grained application traffic flows can be individually restored according to their tolerance to service disruption: a faster IP/MPLS restoration is considered more appropriate for applications with low tolerance, while slower multi-layer restoration is chosen for the others. Also this approach is proved to always comply with application requirements, and it can successfully restore much more application traffic flows than simple optical restoration.

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Section: Description Of the Algorithmmentioning

confidence: 99%

Application-aware service provisioning and restoration in SDN-based multi-layer transport networks

Savi

Siracusa

2018

Optical Switching and Networking

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Benefits of multi-layer application-aware resource allocation and optimization

Savi

Rožić

Matrakidis

et al. 2017

2017 European Conference on Networks and Communications (EuCNC)

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Internet traffic is generated by a multitude of applications, each one with diverse service requirements in terms of bandwidth, latency, reliability, etc. Today traffic engineering techniques can provide service differentiation at the IP/MPLS layer, but not at the optical layer. In this paper we propose a framework where application service requirements drive a dynamic multi-layer (IP/MPLS and optical) resource allocation and optimization. We compare by means of simulations such application-aware algorithmic framework with a multi-layer but application-unaware strategy. Results show that the applicationaware approach, unlike the application-unaware one, is always able to guarantee the specified service requirements to those applications whose generated traffic is accepted by the network. In addition, the application-aware strategy does not consume more network resources than the application-unaware one, but only requires a network that is more dynamic and responsive.

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Application-Centric Dynamic Multi-layer Resource Allocation in Availability-aware SDN-Orchestrated Networks

Abstract: We evaluate our method for dynamically accommodating applications that require more than just bandwidth. Our simulations show the advantages of two availability-aware approaches on a network equipped with an SDN orchestrator.

Cited by 2 publications

References 5 publications

Application-aware service provisioning and restoration in SDN-based multi-layer transport networks

Application-aware service provisioning and restoration in SDN-based multi-layer transport networks

Benefits of multi-layer application-aware resource allocation and optimization

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