Provisioning, Recovery, and In-Operation Planning in Elastic Optical Networks

11 Virtual Network Topology Design and Reconfiguration

Fernando Morales, Marc Ruiz and Luis Velasco

Universitat Politècnica de Catalunya, Barcelona, Spain

The introduction of new services requiring large and dynamic bitrate connectivity can cause changes in the direction of the traffic in metro and even core network segments along the day. As introduced in Chapter 4, this leads to large overprovisioning in statically managed virtual network topologies (VNTs) designed to cope with the traffic forecast. To reduce expenses while ensuring the required grade of service, in this chapter we propose the VNT reconfiguration based on real traffic measurements (VENTURE) approach; it regularly reconfigures the VNT for the next period, thus adapting the topology to both the current and the expected traffic volume and direction. The reconfiguration problem is modeled mathematically, and a heuristic is proposed to solve it in practical times. To support VENTURE, we propose a workflow to be realized on the Application‐Based Network Operation (ABNO) architecture. Exhaustive simulation results together with the experimental assessment of the proposed architecture are presented.

Table of Contents and Tracks’ Itineraries

Average	Theoretical	Practitioner
11.1 Introduction
11.2 VNT Design ...