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View article: Beyond Redundancy: Toward Agile Resilience in Optical Networks to Overcome Unpredictable Disasters
Beyond Redundancy: Toward Agile Resilience in Optical Networks to Overcome Unpredictable Disasters Open
Resilience in optical networks has traditionally relied on redundancy and pre-planned recovery strategies, both of which assume a certain level of disaster predictability. However, recent environmental changes such as climate shifts, the e…
View article: Experimental Evaluation of an SDN Controller for Open Optical-circuit-switched Networks
Experimental Evaluation of an SDN Controller for Open Optical-circuit-switched Networks Open
Open optical networks have been considered to be important for cost-effectively building and operating the networks. Recently, the optical-circuit-switches (OCSes) have attracted industry and academia because of their cost efficiency and h…
View article: Semi-Automatic Line-System Provisioning with Integrated Physical-Parameter-Aware Methodology: Field Verification and Operational Feasibility
Semi-Automatic Line-System Provisioning with Integrated Physical-Parameter-Aware Methodology: Field Verification and Operational Feasibility Open
We propose methods and an architecture to conduct measurements and optimize newly installed optical fiber line systems semi-automatically using integrated physics-aware technologies in a data center interconnection (DCI) transmission scena…
View article: Fast WDM provisioning with minimal probing: the first field experiments for DC exchanges
Fast WDM provisioning with minimal probing: the first field experiments for DC exchanges Open
There are increasing requirements for data center interconnection (DCI) services, which use fiber to connect any DC distributed in a metro area and quickly establish high-capacity optical paths between cloud services and mobile edge comput…
View article: Fast WDM provisioning with minimal probing: the first field experiments for DC exchanges
Fast WDM provisioning with minimal probing: the first field experiments for DC exchanges Open
We propose an approach to estimate the end-to-end GSNR accurately in a short time when a data center interconnect (DCI) network operator receives a service request from users, not by measuring the GSNR at the operational route and waveleng…
View article: Dynamic optical path provisioning for alien access links: architecture, demonstration, and challenges
Dynamic optical path provisioning for alien access links: architecture, demonstration, and challenges Open
With the spread of Data Center Interconnect (DCI) and local 5G, there is a growing need for dynamically established connections between customer locations through high-capacity optical links. However, link parameters such as signal power p…
View article: Increasing Capacity of a Strictly Non-blocking Clos Network Composed of Optical Switches
Increasing Capacity of a Strictly Non-blocking Clos Network Composed of Optical Switches Open
Clos networks are widely used due to their non-blocking property.However, in strictly non-blocking Clos networks composed of ordinary optical switches (switches with equal numbers of input/output ports), we find that a substantial number o…
View article: Distributed Time Series Data Management and Analysis
Distributed Time Series Data Management and Analysis Open
At NTT Network Innovation Laboratories, we are studying sophisticated network management schemes based on network data analysis.In this article, we focus on a distributed data analysis scheme for large amounts of network data.With this sch…