Bela Berde

Improving network performance through policy-based management applied to generalized multi-protocol label switching

Automatically switched circuit establishment is a big step for the operators towards the automation of transport services. The aim is to reduce OPEX while improving service capabilities through a distributed generalized multi-protocol label switching (GMPLS) control plane. Nevertheless, the control plane may not operate on its own and, hence, network operators need a holistic service production platform where intensified traffic engineering (TE) capabilities exist when operating the control plane. The aim of this paper is to point out and discuss issues to be addressed and to provide guiding principles as well as a policy-based management (PBM) solution pertaining to enhanced TE related to the GMPLS control plane protocols and the corresponding network management issues.

Service level agreement in optical networks

This article proposes a Service Level Agreement applied to the optical domain (O-SLA), which is expected to be the near and long term network technology thanks, among other things, to the great bandwidth capacity offered by optical devices. After an exposition of the rationale behind an optical SLA, parameters which could enter in this O-SLA, as well as their values for four classes of services, are proposed. Different client (wavelength or sub-wavelength) and services types (from leased wavelength to bandwidth on demand) are distinguished when necessary.

Generalized Multi-Protocol Label Switching (GMPLS) Unified Control Plane Validation

Generalized Multi-Protocol Label Switching (GMPLS) has become the protocol suite of choice for unified control plane implementation. However, its adoption is facing major challenges in terms of feasibility, performance, and gain when migrating from legacy packet over optical multi-layer networks driven by overlaid control planes. The ITEA TBONES project aims at tackling both objectives through the development of a platform including all the elements constituting such networks: network dimensioning, management plane and GMPLS control plane. This paper details the control plane architecture of the TBONES software platform, including its realization and applicability for multi-area networks, as well as the Testbed. Several experiments are described, both for validation and for demonstration of its capabilities and future usage.

Service Level Agreement in optical networks

This article proposes a Service Level Agreement applied to the optical domain (O-sla), which is expected to be the near and long term network technology thanks, among other things, to the great bandwidth capacity offered by optical devices. After an exposition of the rationale behind an optical sla, parameters which could enter in thisO-sla, as well as their values for four classes of services, are proposed. Different client (wavelength or sub-wavelength) and services types (from leased wavelength to bandwidth on demand) are distinguished when necessary.RésuméCet article propose un Contrat de Niveau Service appliqué au domaine optique. Ce dernier est sensé être la future technologie réseau à court et long terme grâce, entre autres, à la grande capacité en bande passante offerte par les routeurs optiques. Après avoir démontré le besoin en Contrat de Niveau Service dans un réseau optique, nous proposerons des paramètres qui pourraient constituer la Spécification de Niveau Service (Sls) optique, ainsi que leurs valeurs pour quatre classes de services. Nous distinguons, lorsque nécessaire, différents types de clients (longueur d’onde et sous-longueur d’onde) et différents types de services (de la longueur d’onde laissée à la bande passante à la demande).

Policy-based provisioning in hybrid photonic networks

The aim of this work is to present provisioning strategies for GMPLS-enabled Hybrid Photonic Networks (HPN). Contributing to network flexibility, the paper presents extensions to the management system of these transparent wavelength and switching capable networks that provide the means to leverage their inherent capabilities. The paper first addresses the motivation and utility of HPN. Building on this information, it goes on with the constraints to be applied in provisioning of those networks. Finally, to achieve the strategic goal of provisioning, a protocol independent Policy-based Management (PBM) approach is proposed with the corresponding policy control framework and relevant policy categories.

Policy-based hybrid hierarchical optical networks

This document presents provisioning strategies for emerging hybrid optical networks. The idea is to make use of policy-based management that guides the behavior of a network through high-level declarative directives. In this regard and in the context of hybrid optical networks, policy rules are employed as the main means to extend the functionality of the control system and to complement its role in order to achieve the service provisioning.

Traffic Engineering Element for GMPLS Networks

In future multilayer packet circuit networks, the traffic engineering (TE) apparatus is foreseen as a fundamental (logically independent) toolset, which carries out TE tasks, taking into account the operators operational considerations and fulfilling their TE constraints. The TE toolset relies on the generalized multi-protocol label switching (GMPLS) suite of protocols; its description is provided in terms of its functional scope and properties. Next a new TE element (TeE) is proposed that complements the existing TE toolset and its delivered features. Finally, this paper analyzes and compares the architectural and implementation options for the TeE logical entity

Efficient Recovery Strategies for IP/MPLS over Transport Networks 1

Three recovery mechanisms are implemented with the end-to-end signaling capabilities The results presenting the network equipment interface requirements and recovery time performance confirm the advantages of cross-layer coordination of the IP/MPLS data client networks served by a GMPLS transport network

Network management and control for intelligent and agile optical networks

This paper presents work in progress in the framework of the research project NOBEL (Next generation Optical networks for Broadband European Leadership), funded by the European Commission through the IST Program. The NOBEL project has the goal to design and validate the target architecture for an intelligent and agile optical network, which will enable ubiquitous broadband end-to-end services, based on an appropriate core and metro network infrastructure, which aggregates end user traffic and ensures a cost-effective end-to- end transport with the desired level of quality. To this end, the project investigates the evolution of metro and core networks and derives from there the functional requirements of network control and management. The project addresses a multi- dimensional problem space, namely the provision of end-to-end services, the integration of multiple network layers, the simplification of network management and control, and the support of multi-service and multi-domain networks. This paper presents the aims and activities in the area of Network Management and Control Planes (performed in NOBEL Work Package 4). The paper explains that close interworking between all components and instances in care of network control and management is necessary and depicts an approach to achieve this goal.