Browsing by Author "Castoldi, Piero"
Now showing items 1-20 of 21
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Active PCE demonstration performing elastic operations and hitless defragmentation in flexible grid optical networks
(2015-02-01)
Article
Restricted access - publisher's policy -
BER degradation detection and failure identification in elastic optical networks
(2017-08-30)
Article
Open AccessIEEE Optical connections support virtual links in MPLS-over-optical multilayer networks and therefore, errors in the optical layer impact on the quality of the services deployed on such networks. Monitoring the performance ... -
Dedicated protection with signal overlap in elastic optical networks
(Institute of Electrical and Electronics Engineers (IEEE), 2017-11-15)
Article
Restricted access - publisher's policyIn optical dedicated path protection (1 1), the same optical signal is transmitted along both working and backup paths. Thus, in 1 1, the transmission parameters need to be configured according to the most impaired path, ... -
Dynamic core VNT adaptability based on predictive metro-flow traffic models
(Institute of Electrical and Electronics Engineers (IEEE), 2017-12-01)
Article
Open AccessMPLS-over-optical virtual network topologies (VNTs) can be adapted to near-future traffic matrices based on predictive models that are estimated by applying data analytics on monitored origin-destination (OD) traffic. ... -
Early pre-FEC BER degradation detection to meet committed QoS
(Optical Society of American (OSA), 2017)
Conference report
Restricted access - publisher's policyEarly optical layer BER degradation detection is proposed to trigger affected demands re-routing, targeting at reducing SLA violation. Results show that the proposed detection and re-routing algorithms noticeably reduce ... -
Experimental assessment of ABNO-driven multicast connectivity in flexgrid networks
(2015-01-14)
Article
Open AccessThe increasing demand of internet services is pushing cloud services providers to increase the capacity of their data centers (DC) and create DC federations, where two or more cloud providers interconnect their infrastructures. ... -
Experimental assessment of in-operation spectrum defragmentation
(2014-06-01)
Article
Restricted access - publisher's policyDynamic operation of flexgrid networks might cause optical spectrum to be divided into fragments, which makes it difficult finding contiguous spectrum of the required width for incoming connection requests, leading thus ... -
Experimental demonstration of an active stateful PCE performing elastic operations and hitless defragmentation
(2013)
Conference report
Restricted access - publisher's policyAn experimental demonstration of active stateful PCE for flexgrid networks is presented. The PCE enables elastic operations on established connections and, when required, performs hitless defragmentation of spectrum ... -
Filter optimization in SDN-based flexgrid networks
(Optical Society of American (OSA), 2014)
Conference report
Restricted access - publisher's policyThe novel super-filter technique for flexgrid optical networks is proposed to compact spectrum-contiguous lightpaths. The technique is applied in a specifically extended SDN architecture, showing significant gains in terms ... -
First experimental assessment of ABNO-driven in-operation flexgrid network re-optimization
(2015-02-01)
Article
Open AccessTraffic affected by link failures can be recovered using path restoration schemes. In dynamically operated networks provided with a control plane, restoration algorithms run in a centralized element, such as the path ... -
First experimental demonstration of ABNO-driven in-operation flexgrid network re-optimization
(The Optical Society (OSA), 2014)
Conference report
Open AccessThe after failure repair optimization problem is used to experimentally validate in-operation planning using the ABNO architecture to control a flexgrid optical network. A back-end PCE is used to solve this computational ... -
Fully disaggregated ROADM white box with NETCONF/YANG control, telemetry, and machine learning-based monitoring
(Institute of Electrical and Electronics Engineers (IEEE), 2018)
Conference report
Restricted access - publisher's policyA first demonstration of ROADM White Box augmented with machine learning capabilities is demonstrated. The white box includes various level of disaggregation, NETCONF/YANG control, telemetry and spectrum-based advanced ... -
ICT BONE views on the network of the future: the role of optical networking
(2010)
Conference report
Open AccessPart of the activities of the ICT EU Network of Excellence “Building the future Optical Network in Europe” (BONE) project is the development of the European Roadmap on Optical Networking in the context of the “Network ... -
Impact of multi-wavelength sliceable transponders in elastic optical networks
(Institute of Electrical and Electronics Engineers (IEEE), 2015)
Conference report
Open AccessThe utilization of sliceable bandwidth variable transponders based on multi-wavelength technology is evaluated in EONs. A routing and spectrum assignment scheme is proposed specifically designed to consider the constraints ... -
Multipath restoration and bitrate squeezing in SDN-based elastic optical networks [Invited]
(2014-08-01)
Article
Restricted access - publisher's policySliceable bandwidth-variable transponders (SBVTs) enable the adaptation of transmission parameters according to traffic requirements and network constraints. In this study, SBVTs capabilities are evaluated in the context ... -
On the benefits of differentiating the filter configurations in flexi-grid optical networks
(Institute of Electrical and Electronics Engineers (IEEE), 2014)
Conference report
Restricted access - publisher's policyAn effective strategy exploiting differentiated filter configurations in flexi-grid optical networks is proposed and evaluated. Results show that 15% throughput improvements can be achieved with respect to traditional ... -
Routing, spectrum, and transponder assignment in elastic optical networks
(2015)
Article
Open AccessBackbone networks are evolving toward Elastic Optical Network (EON) architecture that allows a flexible and efficient use of spectrum resources. Flexibility in EONs is guaranteed also by emerging sliceable bandwidth variable ... -
Signal overlap for efficient 1+1 protection in elastic optical networks (EONs)
(Optical Society of American (OSA), 2017)
Conference report
Restricted access - publisher's policyAn innovative transmission technique enabling signal overlap is introduced for spectrally-efficient 1+1 protection. Simulation results show that the proposed technique successfully reduces the overall amount of occupied ... -
Soft failure localization during commissioning testing and lightpath operation
(Institute of Electrical and Electronics Engineers (IEEE), 2017-11-09)
Article
Open AccessIn elastic optical networks (EONs), effective soft failure localization is of paramount importance to early detection of service level agreement violations while anticipating possible hard failure events. So far, failure ... -
Superfilter technique in SDN-controlled elastic optical networks
(Institute of Electrical and Electronics Engineers (IEEE), 2015-02-01)
Article
Restricted access - publisher's policyIn flexigrid elastic optical networks, filtering cascade effects strongly affect the overall transmission performance. To avoid these detrimental impairments, each lightpath is typically configured, in an independent way, ...
