Network slicing with Quality of Experience/Quality of Service (QoE/QoS) guarantees is seen as one of the key enablers
of future 5G networks. Nevertheless, it poses several challenges in both resource provisioning and management that
need to be addressed for the efficient end-to-end service delivery. In particular, network slice deployments considering
operation across several domains and network segments, require of inter-domain configurations, continuous monitoring,
potential actuations, inter-slice isolation, among other, in order to be provisioned and maintained, looking forward to
guaranteeing their assured Key Performance Indicators (KPIs). In such scenario, optical networks are of prime
importance, enabling the inter-connectivity between multiple far away segments and Points of Presence (PoPs). In light
of this, in this paper we present an architecture design enabling network slice provisioning for 5G service chaining in
multi-segment/multi-domain optical network scenarios. The presented design is enriched with a policy-based monitoring
and actuation framework able to maintain the desired QoS for the provisioned end-to-end (E2E) network slice. We
experimentally validated the proposal against real slice deployments and traffic generation, providing a proof of concept
for the presented architecture, with special emphasis in the demonstration of the actuation framework as a key element
for quality guarantees.
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