Fibre channel has been applied comprehensively to the new generation of avionics system. This paper presents the design and implementation of a high flexibility, XML-based configuration system of fibre channel avionic...
Fibre channel has been applied comprehensively to the new generation of avionics system. This paper presents the design and implementation of a high flexibility, XML-based configuration system of fibre channel avionics system, namely FC-X.
By using optical duo-binary (ODB) modulation format, we have demonstrated 4×25-Gbps WDM transmission over 40- km SMFs at 1550nm without dispersion compensation and optical amplification, which could be a cost-eff...
By using optical duo-binary (ODB) modulation format, we have demonstrated 4×25-Gbps WDM transmission over 40- km SMFs at 1550nm without dispersion compensation and optical amplification, which could be a cost-effective candidate for 100GE applications.
We improve the phase stabilization of remote RF distribution based on opto-electronic delay locked-loop with a different wavelength backward signal. RMS jitter measured at remote end is under 730fs for a 10GHz, 100km ...
We improve the phase stabilization of remote RF distribution based on opto-electronic delay locked-loop with a different wavelength backward signal. RMS jitter measured at remote end is under 730fs for a 10GHz, 100km transmission.
作者：
周江郭弘CREAM Group
State Key Laboratory of Advanced Optical Communication Systems and Networks and Institute of Quantum Electronics School of Electronics Engineering and Computer Science Peking University
Recently, people begin to analyze the dynamics of an extended system which incorporates two qubits and their respective reservoirs and successfully explain the process of information transmission in Markovian regime [...
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Recently, people begin to analyze the dynamics of an extended system which incorporates two qubits and their respective reservoirs and successfully explain the process of information transmission in Markovian regime [1, 2]. Inspired by their notable results, we study the entanglement dynamics of the composite system via a nonperturbative method [3] with both symmetrical and asymmetrical atom-reservoir couplings. We find that with the introduction of asymmetry, the quantitative criteria for the birth and death phenomena in both Markovian [1] and non-Markovian regime lose their validity. Besides, we investigate an interesting issue that the composite system is composed of a Markovian subsystem and a non-Markovian one.
Schemes integrating inter-carrier interference （ICI） self-cancellation and common phase error （CPE） com- pensation for coherent optical orthogonal frequency division multiplexing （CO-OFDM） systems are investi- g...
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Schemes integrating inter-carrier interference （ICI） self-cancellation and common phase error （CPE） com- pensation for coherent optical orthogonal frequency division multiplexing （CO-OFDM） systems are investi- gated. The purpose of our research is to counteract the impacts of laser phase noise and fiber nonlinearity. We propose two ICI self-cancellation-based CO-OFDM schemes, and adopt a pilot-aided decision feedback （DFB） loop for CPE compensation. The proposed schemes are compared with conventional CO-OFDM schemes at the same spectral efficiency. Simulations show that our schemes can not only enhance laser linewidth tolerance of the CO-OFDM system, but also present strong robustness against fiber nonlinearity.
A 60-GHz bidirectional radio-over-fiber （RoF） system using two-carrier-injected distributed feedback （DFB） laser is proposed and demonstrated to realize optical single sideband （SSB） modulation for *** injection...
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A 60-GHz bidirectional radio-over-fiber （RoF） system using two-carrier-injected distributed feedback （DFB） laser is proposed and demonstrated to realize optical single sideband （SSB） modulation for *** injection-locked Fabry-P＇erot laser is also carried out to realize wavelength reuse in *** of 2.5 Gb/s on a 60-GHz carrier for downlink and 622-Mb/s baseband signal for uplink are both successfully demonstrated over 50-km single mode fiber without chromatic dispersion compensation.
BitTorrent(BT) has emerged as one of the most popular protocols for content sharing in recent years. Most BT applications are network-oblivious which brings great challenges to traffic engineering. As basic input info...
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BitTorrent(BT) has emerged as one of the most popular protocols for content sharing in recent years. Most BT applications are network-oblivious which brings great challenges to traffic engineering. As basic input information, network-wide BT traffic distribution is of vital importance for service providers (SP) or carriers to enforce appropriate control policies. Direct online measurement of network-wide BT traffic faces scalability issue, for it requires deploying application identification deep packet inspection (DPI) device on every subject link. In this paper, we propose a novel approach to estimate network-wide BT traffic distribution through combining sFlow and Tracker traffic analysis. Owing to a noticeable increase of BT traffic using random port numbers, sFlow alone is no longer sufficient for BT recognition. We tackle this problem by combining sFlow with information collected from BT tracker's traffic. With assistance of this information, BT samples can be accurately distinguished from other sFlow samples. The efficacy of our approach is evaluated through experiments on backbone links of campus network. Evaluation results show that our approach can reach a high accuracy in network-wide BT traffic estimation.
Joint scheduling of both computation and communication resources for workflow based distributed computing application over opticalnetworks has been studied recently. Most algorithms proposed in previous work are main...
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ISBN:
(纸本)9781457702495
Joint scheduling of both computation and communication resources for workflow based distributed computing application over opticalnetworks has been studied recently. Most algorithms proposed in previous work are mainly based on static scheduling strategies with assumption that detail resource information and accurate performance prediction is available. In this paper, we propose to employ shared virtualized optical network (VON) for the task scheduling problem. Both customers and carriers can benefit from such architecture with better flexibility and scalability. Based on a new Scheduled Result Graph (SRG) concept, we propose a computation and communication delay aware rescheduling (C 2 DAR) scheme to deal with the dynamics from shared VON resources. We evaluate the performance of dynamic scheduling scheme over shared VON in comparison to the static scheduling over dedicated VON and entire optical network respectively. Simulation results also show that C 2 DAR scheme outperforms traditional computation delay aware rescheduling (CDAR) scheme under shared VON scenario.
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