- 标题
- 摘要
- 关键词
- 实验方案
- 产品
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[IEEE 2019 22nd International Multitopic Conference (INMIC) - Islamabad, Pakistan (2019.11.29-2019.11.30)] 2019 22nd International Multitopic Conference (INMIC) - Secure optical fiber transmission via ghost imaging
摘要： We demonstrate error-free 100-Gb/s optical packet switching with low power consumption by using a combination of a label processor and 8 × 8 broadcast-and-select (B&S) optical switch. To achieve energy-ef?cient label processing, an optical-trigger-pulse generator that consumes energy only for a very short duration is realized, whereas the optoelectronic serial-to-parallel converter used to interface the fast label bits to a slow CMOS processor has been improved to operate with a reduced trigger pulse energy of 0.35 pJ. Moreover, the electro-absorption-modulator-based B&S optical switch is signi?cantly enhanced by introducing a surface ground electrode for eliminating electrical crosstalk and integrated spot-size converters with easy fabrication process. The total power consumption of the full 8 × 8 optical packet switch is estimated to be as low as 27.3 W or 3.4 W/100-Gb/s port.
关键词： optical label processor,optical switches,optical circuit switching (OCS),optical packet switching (OPS),Data center network
更新于2025-09-19 17:13:59
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[IEEE 2019 IEEE 8th International Conference on Advanced Optoelectronics and Lasers (CAOL) - Sozopol, Bulgaria (2019.9.6-2019.9.8)] 2019 IEEE 8th International Conference on Advanced Optoelectronics and Lasers (CAOL) - Laser Cutting of the Materials in Presence of Oil Flame (Invited)
摘要： Energy consumed by network constitutes a significant portion of the total power budget in modern data centers. Thus, it is critical to understand the energy consumption and improve the power efficiency of data center networks (DCNs). In doing so, one straightforward and effective way is to make the size of DCNs elastic along with traffic demands, i.e., turning off unnecessary network components to reduce the energy consumption. Today, software defined networking (SDN), as one of the most promising solutions for data center management, provides a paradigm to elastically control the resources of DCNs. However, to the best of our knowledge, the features of SDN have not been fully leveraged to improve the power saving, especially for large-scale multi-controller DCNs. To address this problem, we propose E3MC, a mechanism to improve DCN’s energy efficiency via the elastic multi-controller SDN. In E3MC, the energy optimizations for both forwarding and control plane are considered by utilizing SDN’s fine-grained routing and dynamic control mapping. In particular, the flow network theory and the bin-packing heuristic are used to deal with the forwarding plane and control plane, respectively. Our simulation results show that E3MC can achieve more efficient power management, especially in highly structured topologies such as Fat-Tree and BCube, by saving up to 50% of network energy, at an acceptable level of computation cost.
关键词： energy management,SDN,Data center network,multi-controller,elastic structure
更新于2025-09-19 17:13:59
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[IEEE 2019 IEEE 46th Photovoltaic Specialists Conference (PVSC) - Chicago, IL, USA (2019.6.16-2019.6.21)] 2019 IEEE 46th Photovoltaic Specialists Conference (PVSC) - Design of Light-Weight Solar Panels
摘要： Energy consumed by network constitutes a significant portion of the total power budget in modern data centers. Thus, it is critical to understand the energy consumption and improve the power efficiency of data center networks (DCNs). In doing so, one straightforward and effective way is to make the size of DCNs elastic along with traffic demands, i.e., turning off unnecessary network components to reduce the energy consumption. Today, software defined networking (SDN), as one of the most promising solutions for data center management, provides a paradigm to elastically control the resources of DCNs. However, to the best of our knowledge, the features of SDN have not been fully leveraged to improve the power saving, especially for large-scale multi-controller DCNs. To address this problem, we propose E3MC, a mechanism to improve DCN’s energy efficiency via the elastic multi-controller SDN. In E3MC, the energy optimizations for both forwarding and control plane are considered by utilizing SDN’s fine-grained routing and dynamic control mapping. In particular, the flow network theory and the bin-packing heuristic are used to deal with the forwarding plane and control plane, respectively. Our simulation results show that E3MC can achieve more efficient power management, especially in highly structured topologies such as Fat-Tree and BCube, by saving up to 50% of network energy, at an acceptable level of computation cost.
关键词： Data center network,multi-controller,SDN,elastic structure,energy management
更新于2025-09-19 17:13:59
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Modal delay and modal bandwidth measurements of bi-modal optical fibers through a frequency domain method
摘要： We propose a simple and robust frequency domain method for measuring modal delay and bandwidth of bi-modal optical ?bers. An analytical transfer function model is formulated showing excellent agreement with experimental results for relatively short ?bers. Using the model, a full set of information can be extracted, including modal delay and modal bandwidth under any launch conditions. As a result, one can obtain a worst-case modal bandwidth that can gauge the ?ber modal bandwidth under general conditions. In addition, the frequency domain measurement method and the analytical model are validated through the excellent agreements with the time domain measurement results. The analytical model is also generalized for longer ?ber lengths when additional degradation e?ects become signi?cant to alter the behavior of the transfer function. Through the detailed study, we show that the simple frequency domain measurement method as facilitated by the analytical model can deliver a full set of modal delay and modal bandwidth information that otherwise requires more complex method of di?erential mode delay measurements.
关键词： Optical ?ber communications,Data center,Fiber modal bandwidth,Bi-modal ?bers
更新于2025-09-19 17:13:59
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[IEEE 2019 18th International Conference on Optical Communications and Networks (ICOCN) - Huangshan, China (2019.8.5-2019.8.8)] 2019 18th International Conference on Optical Communications and Networks (ICOCN) - Time-Division based Scheduling Scheme for Hybrid Optical/Electrical Data Center Network
摘要： the Past few years have witnessed the great development of Optical Circuit Switches (OCSes), which support high and dynamic bandwidth at low per-bit overhead in the data center network. Although OCSes deliver variety of attractive properties, the challenge still remains due to the unneglectable reconfiguration delay of OCSes. Previous OCS-based proposals amortize long reconfiguration overhead by reconfiguring OCSes at intervals of a few 100s of milliseconds, which inevitably incurs a mass of packets waiting during reconfiguration intervals, hence the degradation of network performance happens. In this paper, we propose an OCS-based scheduling scheme named Time-Division Scheduling (TDS), which groups OCSes and reconfigures different groups in sequential time slots, instead of periodically reconfiguring all OCSes. TDS diminishes the impact of the long reconfiguration delay with mere directly software modifications. We evaluate the performance of TDS via OMNET++. The experimental results show that TDS delivers significant performance enhancements in latency and benefits slightly on the throughput.
关键词： Optical Circuit Switch,Data Center Networks,Scheduling Scheme
更新于2025-09-16 10:30:52
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[IEEE 2018 Asia Communications and Photonics Conference (ACP) - Hangzhou (2018.10.26-2018.10.29)] 2018 Asia Communications and Photonics Conference (ACP) - Data center optical interconnection based on IRZ-DPSK signal
摘要： the expansion of optical data centers will lead to insufficient wavelength resources. This paper proposes a wavelength-reused scheme. Two signals are imposed on the same optical carrier to reduce the number of wavelengths by half.
关键词： Passive optical interconnection,Data center,DPSK
更新于2025-09-11 14:15:04
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[IEEE 2019 21st International Conference on Transparent Optical Networks (ICTON) - Angers, France (2019.7.9-2019.7.13)] 2019 21st International Conference on Transparent Optical Networks (ICTON) - SDN-Enabled Reconfigurable Optical Data Center Networks Based on Nanoseconds WDM Photonics Integrated Switches
摘要： An SDN-controlled optical DCN based on photonics integrated switch enabling QoS-driven network-slice provisioning and reconfiguration is experimentally assessed. Network-slice can be dynamically reconfigured within 150 ms to maintain specified QoS per network-slice. Controlled by the optical flow control protocol, the deployed photonics integrated switches perform error-free 10 Gb/s switching with < 2dB penalty and zero packet-loss caused by the packet contention.
关键词： network slicing,software-defined networking,photonics integrated switch,optical data center
更新于2025-09-11 14:15:04
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[IEEE 2019 24th OptoElectronics and Communications Conference (OECC) and 2019 International Conference on Photonics in Switching and Computing (PSC) - Fukuoka, Japan (2019.7.7-2019.7.11)] 2019 24th OptoElectronics and Communications Conference (OECC) and 2019 International Conference on Photonics in Switching and Computing (PSC) - Fast Dynamic Control of Optical Data Center Networks Based on Nanoseconds WDM Photonics Integrated Switches
摘要： We demonstrate a fast and dynamic control of photonic switches based DCN by a distributed optical-flow control. Results show error-free 10 Gb/s switching with < 2dB penalty, no packet-loss at switch and 260.66ns end-to-end latency.
关键词： Data Center Network and Subsystem,Optoelectronic and all-optical switches
更新于2025-09-11 14:15:04
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[IEEE 2019 21st International Conference on Transparent Optical Networks (ICTON) - Angers, France (2019.7.9-2019.7.13)] 2019 21st International Conference on Transparent Optical Networks (ICTON) - Demonstration of an OpenROADM SDN-Enabled Network for Geo-Distributed Data Centers
摘要： This paper describes an integrated system consisting of three domains (or layers): a Wavelength Division Multiplexing (WDM) optical domain, an Ethernet packet switching domain, and a data center compute domain. The resources across the three domains are managed by a single orchestrator software module through the use of standard interfaces based on OpenROADM, OpenFlow, and OpenStack, respectively. A demonstration consisting of OpenROADM-certified optical equipment from two vendors, OpenFlow commercial switches, and repurposed Stampede compute nodes is also reported.
关键词： SDN Orchestrator,OpenROADM,OpenStack,optical network,data center interconnection,TransportPCE
更新于2025-09-11 14:15:04
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Hardware implementation of optical switching node for data center networks
摘要： In high performance data center networks, switching the data from source node to destination node needs a proper signal processing to decode the address bits and switch the data and to avoid contention. In this article, we propose the hardware design for switching the data from one node to other bi-directionally. The design is verified in an experimental test bed.
关键词： hardware implementation,data center networks,optical switching
更新于2025-09-10 09:29:36