Bitrate guarantees strategies for customer virtual networks dynamic reconfiguration

Abstract

Application-specific Quality of Service (QoS) and additional Service Level Agreement (SLA) parameters to guarantee the committed service quality and avoid service interruption may be crucial in emerging applications and services. Moreover, among the wide range of services over IP transport networks, those requiring bandwidth-on-demand and related to network functions virtualization (NFV) are of particular interest. IETF is working on the Abstraction and Control of Transport Networks (ACTN) framework to facilitate network resources virtualization to support NFV. Customers can request on-demand connectivity between their end-points (EPs) to reconfigure customer virtual network (CVN) topology dynamically. In addition to CVN reconfiguration, QoS constraints and service guarantees can be requested to satisfy application-specific requirements. In this work we study two different approaches to satisfy the committed bitrate guarantees in CVN links. Exhaustive simulation results show that the diversity strategy highly improves performance and provides remarkable CAPEX savings.