The plethora of network planning results published in top-ranked journals is a good sign the success research field. Unfortunately, it often difficult for carriers and ISPs to reproduce these investigations on their networks. This partially because absence software tool, meeting requirements industry academia, which can make adaptation validation algorithms less time consuming. We describe how paradigm shift an open source view field emphasizes power distributed peer review transparency...

Network slices combine resource virtualization with the isolation level required by future 5G applications. In addition, use of monitoring and data analytics help to maintain network performance, while reducing total cost ownership. this paper, an architecture enable autonomic slice networking is presented. Extended nodes make local decisions close devices, whereas centralized domain systems collate export metered transparently customer controllers, all them leveraging customizable isolated...

Focused on reducing capital expenditures by opening the data plane to multiple vendors without impacting performance, node disaggregation is attracting interest of network operators.Although SDN paradigm key for control such networks, increased complexity multilayer networks strictly requires monitoring/telemetry and analytics capabilities assist in creating operating selfmanaged (autonomic) networks.Such autonomicity greatly reduces operational expenditures, while improving performance.In...

Disaggregation at the optical layer is expected to bring benefits network operators by enriching offering of available solutions and enabling deployment nodes that better fit their needs. In this paper, we assume a partially disaggregated model with transponder for transmission ROADMs switching, where each node conceived as whitebox consisting set devices local controller exposes single interface software-defined networks (SDN) controller. An architecture provide autonomic networking...

The software-defined networking (SDN) paradigm brings unprecedented agility and flexibility to network operators. usage of centralized software-based controllers simplifies operation management enables innovation in the control plane through programmability. Besides, a controller may be operated via third-party applications using so-called northbound application programming interfaces (APIs). In this paper, we report our preliminary work on interaction between interface open-source...

In heterogeneous flex-grid networks, optical connections for different line rates, spectral widths, and modulations can coexist in the same infrastructure. Optical are transparently routed by reconfigurable add/drop multiplexers (ROADMs). Flex-grid ROADMs enabled state-of-the-art evolution from original wavelength-selective switches (WSSs), designed fixed-grid applications, to WSSs that operate flexible grids. Broadcast-and-select (B&S) subject internal blocking as their counterparts,...

Atherosclerosis is a cardiovascular disease very widespread into population. It characterized by thickening of the arterial walls, which affects blood flow. The intima-media thickness (IMT) has emerged as reliable early indicator this pathology.

Novel end-to-end services are expected to emerge with the advent of 5G. In order satisfy QoS/QoE requirements (e.g., lower latency, higher traffic volume and dynamicity, or availability) those services, major changes on network architecture required. Technologies such as SDN NFV, in conjunction edge-computing paradigm facilitate this transition, enabling presence cloud-enabled systems mobile radio access networks. paper, we present a novel approach handle Service Chaining handover,...

We show that IP-over-WDM multilayer networks can be designed to guarantee a large majority of the traffic is restored at subsecond timescale, using IP Fast Rerouting techniques. The rationale enforcing OSPF/ECMP balancing on SRG-disjoint lightpaths.

When designing a multilayer IP-over-WDM optical network, an important requirement is finding the most cost-effective design that tolerant of set selected failures arbitrarily defined, so 100% IP traffic survives for them. A second concern need to guarantee maximum end-to-end latency (e.g. 50 ms in continental US). Unfortunately, fault tolerance and at layer are performance merits extremely challenging enforce networks, since they depend on both routing over lightpaths lightpath fibers, how...

We argue that open source network planning tools like Net2Plan, and related repositories of resources, can help to bridge the gap between academia industry speeding-up technology transfer investigations.

The massive adoption of real-time Internet services (e.g., online gaming or video streaming) is threatening the way in which operators and service providers design operate their networks. New requirements, such as maximum latency, are becoming de facto indicators to measure network quality, complementing classical requisites fault tolerance increase availability. However, finding fault-tolerant designs that also limit end-to-end latency IP flows challenging multilayer IP-over-WDM networks,...

A distributed architecture enabling active and passive optical network telemetry is presented; a YANG data model used for remotely configuring monitoring devices purposes. Experimental demonstration carried out failure localization.

Economic sustainability of the ever-increasing traffic requirements is built on cost reduction IP-over-WDM backbone networks. These networks are composed a set IP routers connected via all-optical circuits (or lightpaths), bypassing intermediate nodes, thanks to reconfigurable optical equipment. Today, survivability ensured by over-dimensioning layer and using some IP/MPLS fast convergence/reroute mechanism, without making use reconfigurability layer. In this paper, we provide algorithms...

This paper presents Net2Plan tool and Java Optimization Modeler (JOM) library discusses their application as research tools educational resources in the field of network optimization. is designed to assist users definition comparative evaluation original planning algorithms, well simulation testing connection admission control protection/restoration schemes. In its turn, JOM a which helps model optimization problems language solve them interfacing with integrated linear non-linear solvers....

In IP over WDM multilayer optical networks, routers are interconnected by all-optical channels called lightpaths, of typical rates 10, 40, or, more recently, 100 Gb/s. this context, lightpath bundling (LB) and anycast switching (AS) control plane data techniques, respectively, both them to be implemented in the routers. LB permits grouping a set lightpaths between two nodes that follow common route so they perceived layer as single virtual link aggregated capacity. its turn, AS consists...

Multilayer networking is an enabling technology to support the exponential growth of traffic and its dynamicity, with sustainable costs. However, automation collaboration between layers are still on early stage. One reasons absence pure multilayer planning management solutions considering network as a whole entity, where cooperate each other, instead sum individual providing isolated services. In this paper, we revisit our open-source Net2Plan tool present new features. The novel...

Leveraging on reference implementations of PCEP and BGP-LS protocols, we have developed an active stateful multilayer PCE extension for the open-source Net2Plan planning tool to orchestrate service provisioning restoration in IP/MPLS-over-WDM networks.

The dawn of 5G is pushing operators to deploy high-capacity, agile networks capable adapting time-varying traffic patterns, especially into metro sections. ROADMs are key enablers for agility in the optical layer, however benefits this do not always compensate increased costs. As such, filterless emerging as a cost-effective and reliable solution compared active photonics, thanks winning combination coherent transponders passive splitters/couplers. However, spectrum allocation management...

In this paper, we evaluate the capacity reduction in a network composed of directionless-colorless ROADMs, caused by internal blocking ROADMs that are not contentionless. We interested determining number add/drop modules, so-called contention factor C, eliminate practice. Under simulation, show moderated (C = 2) is sufficient to roughly provide same performance as contentionless nodes terms either probability long-run or carried traffic before first event. Results were obtained within...

A generic node agent supporting disaggregated telemetry is presented.Data collection close to devices enable making local decisions, leveraging SDN controllers for network-wide operations.The demonstrated in a BER-triggered transponder reconfiguration scenario.

With new data hungry application flooding the air traffic management (ATM) world, driven by system-wide information (SWIM), advanced aeronautical (AIM) exchange, and latest remote virtual tower (RVT) video applications, ATM industry is looking at modern, safe, secure network technologies such as Software Defined Networks (SDN). Just a few years ago, only forward-leaning organizations embraced this compelling concept to programmatically control their resources.Today, SDN acknowledged major...

Lightpath bundling (LB) technique consists of grouping a set lightpaths between two nodes so that they appear to the IP layer as single pipe aggregated capacity. Anycast switching (AS) makes per-packet granularity balancing traffic among bundled. LB+AS combination requires seamless changes in and no optical infrastructure. This paper evaluates by means simulation improvements TCP performances when paradigm is applied network. In our results, improved throughput (up 18%), decreased average...

Continuous advances in network technologies challenge architects their attempt to foresee what new deserve resources and investments, existing infrastructure keep, interplay during migration processes. Moreover, topics like energy efficiency, disaster resilience, or SDN/NFV are being intensively considered investigated the last years. As a result, R&D efforts have led number of solutions. Unfortunately, it is often difficult for operators reproduce such results on networks, maybe due...