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We summarized the development of Venture Photonics' sub-10 ns fast optical switch which demonstrates low insertion loss, excellent crosstalk level and polarization independent switching performance.
We present an FPGA-based optical switch and interface card (SIC) for an optical disaggregated OPS/OCS DCN. It eliminates electronics from ToR switch and enables direct intra-rack blade-to-blade communication to deliver ultra-low intra-rack latency.
The flexibility and trade-offs of node subsystems are evaluated for the first time under different design configurations. The proposed method presents a direct approach to identify the impact of various key subsystems figures of merit for add/drop networks and EONs.
This paper addresses scalability in mega-DCs combining for the first time graph factorization with compressive sensing theories. Our modelling results indicate drastically reduced amounts of traffic transferred from the data to control plane and number of optimization process variables.
Due to the large transmission speeds and enormous volumes of transferred data, network availability performance is one of the key issues in optical long-haul networks, comprising nodes implemented by optical cross-connects (OXCs). In this context, the design of OXCs is becoming very challenging since they have to support both legacy lower bit-rates and future highspeed super-channels by means of flexible...
Synthesis, placement and configuration of SSS and EDFAs for different power balance scenarios is presented, for the first time, for function programmable optical node architectures. Comparison on device's number and OSNR performance are reported.
To support scalable service provisioning in converged optical/wireless clouds we adopt for the first time compressive sensing (CS) techniques. CS achieves optimal service provisioning with significantly reduced control and management information and computational complexity.
A converged optical-wireless testbed is formed integrating TSON sub-wavelength networking in UK and the NITOS wireless solution in Greece. End-to-end service provisioning and flow differentiation are demonstrated across two networks communicating over the GEANT.
We demonstrate a real-time Elastic Interface for future flex-grid networks with a software-defined symbol rate transmission. Using PDM-QPSK modulation, live experiments show a line rate adaptation from 10.7 to 107Gbit/s with a sub-millisecond reconfiguration time.
We quantitatively measure and evaluate the flexibility of key optical devices of ROADMs considering maximum system entropy. We analyze the dependency and trade-offs between flexibility, connectivity, capacity, granularity and spectral efficiency, key design performance indicators.
Generally, data center's applications have different Quality of Service (QoS) requirements. Meanwhile, data center's tenants may give different priorities to performance and cost. Therefore, it is unsuitable to treat applications/tenants equally. In this paper, we adopt Dynamic Pricing (DP) to charge for the usage of bandwidth and provide tenants with capability to automatically response to the dynamic...
This paper focuses on the design of dependable Mobile Optical Virtual Networks (MOVNOs) to enable multi-tenancy over converged wireless, optical and computational infrastructures supporting cloud and mobile cloud services. Dependability is defined as the MOVNO's ability to offer resilience in case of network or computing resource failures and security guarantees in terms of isolation between MOVNOs...
In Mobile Cloud Computing where computing power and data storage are moving away from mobile devices to remote computing resources, traffic computational offloading has been proposed as a key enabling technology to provide improved computational performance and maximize the battery lifetime of end devices. However, traffic offloading can only be adopted, if strict latency constraints imposed by the...
Programmable optical nodes supporting heterogeneous traffic require optical backplanes with a high port count. We present two backplane architectures to enhance modularity, compare their scalability in terms of available cross-connections and we experimentally validate both proposals in a SDN scenario.
This paper describes a demonstration of SDN-based optical transport network virtualization and orchestration. Two scenarios are demonstrated: a dynamic setup of optical connectivity services inside a single domain as well as a multidomain service orchestration over a shared optical infrastructure using the architecture defined in the STRAUSS project.
We present and experimentally assess in an international testbed an ABNO-based network orchestrator for end-to-end multi-layer (OPS and Flexi-grid OCS) and multi-domain provisioning across heterogeneous control domains (SDN/OpenFlow and GMPLS/Stateful PCE) employing dynamic domain abstraction based on virtual node aggregation.
This study looks into network planning issues for synthetic MCF-based SDM networks implemented through programmable ROADMs. The results show that significant savings in switching modules and energy can be attained by exploiting the flexibility inherent in programmable ROADM through a proper network design.
The paper demonstrates the concept of optical networks with nodes implemented by the architecture on demand (AoD) and proposes a procedure for finding out possible benefits of AoD application, related to node and network availability. AoD node structure enables efficient failure management by creating a set of redundant components, which can be used for self-healing of optical nodes after failure...
Current over-provisioned and multi-tier data centre networks (DCN) deploy rigid control and management platforms, which are not able to accommodate the ever-growing workload driven by the increasing demand of high-performance data centre (DC) and cloud applications. In response to this, the EC FP7 project LIGHTNESS (Low Latency and High Throughput Dynamic Network Infrastructures for High Performance...
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