IDEALIST control and service management solutions for dynamic and adaptive flexi-grid DWDM networks

Wavelength Switched Optical Networks (WSON) were designed with the premise that all channels in a network have the same spectrum needs, based on the ITU-T DWDM grid. However, this rigid grid-based approach is not adapted to the spectrum requirements of the signals that are best candidates for long-reach transmission and high-speed data rates of 400Gbps and beyond. An innovative approach is to evolve the fixed DWDM grid to a flexible grid, in which the optical spectrum is partitioned into fixed-sized spectrum slices. This allows facilitating the required amount of optical bandwidth and spectrum for an elastic optical connection to be dynamically and adaptively allocated by assigning the necessary number of slices of spectrum. The ICT IDEALIST project will provide the architectural design, protocol specification, implementation, evaluation and standardization of a control plane and a network and service management system. This architecture and tools are necessary to introduce dynamicity, elasticity and adaptation in flexi-grid DWDM networks. This paper provides an overview of the objectives, framework, functional requirements and use cases of the elastic control plane and the adaptive network and service management system targeted in the ICT IDEALIST project

ACINO: Second year report on dissemination and communication activities

This ACINO deliverable presents the communication and dissemination activities performed by the consortium during the first two years of the project. We have communicated using our website, Twitter account and by various communication actions: The website saw over 3000 unique visitors during the first year and over 4000 during the second year; The consortium Twitter account had 49 followers at the end of the first year and 80 at the end of the second year. We posted 50 tweets during the first year and 40 more during the second year; We also held a press release and an interview in a magazine during the first year, and had three more similar communication actions during the second year. The dissemination activities have been composed of participation in public events where the goals and concepts of ACINO were presented via publications, presentation, workshops, courses and demonstrations. Overall, over forty different dissemination activities have been performed: An article has been published in peer-reviewed, open access Journal of Green Engineering; Eighteen articles have been published in conferences: four during the first year and fourteen during the second. One of them was a post-deadline and six were invited papers; We have co-organised three workshops: the Workshop on Network Function Virtualization and Programmable Networks at EUCNC 2015, the first Workshop on Multi-Layer Network Orchestration (NetOrch) at ICTON 2016 and the stand-alone ONOS/CORD workshop; We have held 16 talks, tutorial, courses and demonstrations; Consortium members have won two prizes for work related to ACINO: a team of developers won the 3rd prize of the ONOS Build Hackathon, and Telefónica won the Best SDN-NFV solution award at the LTE and 5G World conference by presenting a solution in which Sedona Systems was involved; We have contributed to six IETF standardisation documents and done some implementation and test of these standards. We have contributed to two open source projects: the NetPhony and ONOS controllers, with the implementation of main features being accepted and merged to the core code of these open source projects. Finally, the project has devised detailed plans for its dissemination activities for the last year of the project. We have: Confirmed plans for the organisation of a workshop, the second edition of the NetOrch workshop, co-located with the ICTON conference; A solid plan for continued dissemination in conferences (already five accepted conference papers, five talk invitations and a list of conferences of interest) and in peer-reviewed journals, with one article accepted for publication in the Journal of Lightwave Technology, two articles under review and plans for four more; Some more planned contribution to open source projects

IDEALIST control and service management solutions for dynamic and adaptive flexi-grid DWDM networks

Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works. R. Muñoz, V. López, R. Casellas, O. González de Dios, F. Cugini, N. Sambo, A. d'Errico, O. Gerstel, D. King, S. López-Buedo, P. Layec, A. Cimmino, R. Martínez, and R. Moro, "IDEALIST control and service management solutions for dynamic and adaptive flexi-grid DWDM networks", in Future Network and Mobile Summit, 2013, pp. 1-10Wavelength Switched Optical Networks (WSON) were designed with the premise that all channels in a network have the same spectrum needs, based on the ITU-T DWDM grid. However, this rigid grid-based approach is not adapted to the spectrum requirements of the signals that are best candidates for long-reach transmission and high-speed data rates of 400Gbps and beyond. An innovative approach is to evolve the fixed DWDM grid to a flexible grid, in which the optical spectrum is partitioned into fixed-sized spectrum slices. This allows facilitating the required amount of optical bandwidth and spectrum for an elastic optical connection to be dynamically and adaptively allocated by assigning the necessary number of slices of spectrum. The ICT IDEALIST project will provide the architectural design, protocol specification, implementation, evaluation and standardization of a control plane and a network and service management system. This architecture and tools are necessary to introduce dynamicity, elasticity and adaptation in flexi-grid DWDM networks. This paper provides an overview of the objectives, framework, functional requirements and use cases of the elastic control plane and the adaptive network and service management system targeted in the ICT IDEALIST project.This work was partially funded by the European Community’s Seventh Framework Programme FP7/2007-2013 through the Integrated Project (IP) IDEALIST under grant agreement nº 317999

Dynamic Wavelength Allocation in All-Optical Ring Networks

We focus on wavelength allocation schemes for all-optical WDM ring networks. For an N node network we characterize the traffic by its load L (the maximum number of lightpaths that share a link) and do not assume knowledge of the arrival/departure processes. We prove that shortest path routing produces a routing which has at most twice the load of the optimal solution. We show that at least 0:5L log 2 N wavelengths are required by any algorithm in the worst case, and develop an algorithm which requires up to 3L log 2 N wavelengths. For the case when the load is high and blocking is necessary we present an improved algorithm. Technical Subject Area: Optical communications This work was supported in part by grant MDA 972-95-C-0001 from ARPA. A preliminary version of this paper was published as an IBM research report no. RC20462, May Dynamic Wavelength Allocation in All-Optical Ring Networks, O. Gerstel and S. Kutten 1 1 Introduction 1.1 Background As WDM systems start emerging from ..

On The Future Of Wavelength Routing Networks

This article discusses the possible applications for optical networks based on wavelength division multiplexing and how they compete and complement current high-speed networks (SONET,ATM). We first outline the best-case scenario for this technology and describe the spectrum of proposed optical networks (WDM links, passive optical access networks, broadcast-and-select networks, and wavelength routing networks). Then we focus on wavelength routing networks and describe their advantages and disadvantages relative to other competing alternatives for very high-speed networks. Finally, we analyze the different markets for such networks in the telco and data communications arena. Keywords: Optical networks, Wavelength division multiplexing, SONET/SDH. 1 Introduction Wavelength division multiplexing (WDM) is the technology of transmitting multiple data streams independently on a single fiber using different light wavelengths. This technology, in the form of point-to-point multiplexer/demulti..

Cost-effective traffic grooming in WDM rings

We provide network designs for optical wavelength division multiptezed (OWDM) rings that minimize overall network cost, rather than just the number of wavelengths needed. The network cost includes the cost of the transceivers re-quired at the nodes as well as the number of wavelengths. The transceiver cost includes the cost of terminating ecluip-ment EM well as higher-layer electronic processing equipment, and in practice, can dominate over the cost, of the number of wavelengths in the network. The networks support dynamic (time varying) traffic streams that are at lower rates (e.g., OC-3, 155 Mb/s) than the lightpath capacities (e.g., OC-48, 2.5 Gb/s). A simple OWDM ring is the point-to-point ring, where traffic is transported on WDM links optically, but switched through nodes electronically. Although the network is efficient in using link bandwidth, it has high electronic and opto-electronic processing costs. Two OWDM ring net-works are given that have similar performance but are less expensive. Two other OWDM ring networks are considered that are nonblocking, where one has a wide sense nonblocking property and the other has a rearrangeubly nonblocking prop-erty. All the networks are compared using the cost criteria of number of wavelengths and number of transceivers.

Fault Tolerant Multiwavelength Optical Rings with Limited Wavelength Conversion

This paper presents methods for recovering from channel failures, link failures, and node failures in a wavelength-division multiplexed (WDM) ring network, with limited wavelength conversion capabilities at the nodes. Different recovery schemes are presented to handle each type of failure. Each scheme is evaluated based on the network hardware configuration required to support it, and the performance and management overheads associated with fault-recovery. Keywords: Optical networks, fault-tolerance, self-healing rings. This work was supported in part by grant MDA 972-95-C-0001 from ARPA. 1 Introduction Today's telecommunications infrastructure is based on SONET/SDH self-healing rings. To increase the bandwidth of their trunks, the carriers are actively deploying wavelength-division-multiplexed (WDM) pointto -point links. It is likely that WDM ring networks will come next, as a natural evolution of WDM links and SONET rings. A WDM network provides lightpaths. A lightpath is an en..