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Asia communications and Photonics Conference, ACP 2013

作者： Chen, Yuanxiang Li, Juhao Zhu, Paikun Xu, Yingying Guo, Bingli Zhang, Fan He, Yongqi Chen, Zhangyuan State Key Lab. of Advanced Optical Communication Systems and Networks Peking University Beijing 100871 China

3-fold 1.2 Tb/s optical PDM SCFDM and OFDM superchannel multicasting by HNLF are experimentally demonstrated and compared in this paper. The OSNR penalty of the newly generated SCFDM superchannel is 0.5 dB lower than ... 详细信息

ISBN: (纸本)9781557529893

关键词： Multicasting

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Experimental demonstration of grooming functionality on Tbit/s optical superchannel

Experimental demonstration of grooming functionality on Tbit...

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Signal Processing in Photonic communications, SPPCom 2013

作者： Chen, Yuanxiang Li, Juhao Zhu, Paikun Xu, Yingying Zhong, Yucheng Guo, Bingli He, Yongqi Chen, Zhangyuan State Key Lab. of Advanced Optical Communication Systems and Networks Peking University Beijing 100871 China

We propose a node architecture that supports grooming functionality for optical superchannel. And we experimentally demonstrate the add/drop, spectral defragmentation and power equalization functionality on Tbit/s OFD... 详细信息

ISBN: (纸本)9781557529817

关键词： Attenuation coefficient optical networks Orthogonal frequency division multiplexing Q factor Reconfigurable optical add drop multiplexers Tunable lasers networks (060.4250) optical communications (060.4510) Nonlinear optics, four-wave mixing (190.4380)

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A novel coherent optical single-carrier Frequency-division-multiplexing (CO-SCFDM) scheme For optical fiber transmission system

A novel coherent optical single-carrier Frequency-division-m...

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Photonics in Switching, PS 2010

作者： Juhao, Li Zhang, Su Zhang, Fan Chen, Zhangyuan State Key Lab. of Advanced Optical Communication Systems and Networks Peking University Beijing 100871 China

We propose a novel coherent optical single-carrier frequency-division-multiplexing (CO-SCFDM) scheme, which has significantly lower PAPR while achieves high commonality in parameter design with CO-OFDM system. Moreove... 详细信息

ISBN: (纸本)9781557528957

关键词： Peak to average power ratio

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A Novel Approach for TNA Address Management

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光学学报 2003年第S1期23卷 767-768页

作者： Xiaodong Wang, Yaohui Jin, Weishen Hu, Shenli Zhu state key lab of advanced optical communication systems and networks, Shanghai Jiao Tong University, P. R.China State Key Lab of Advanced Optical Communication Systems and Networks Shanghai Jiao Tong University P. R.China

We present a new scheme to allocate/de-allocate Transport network Assigned (TN A) address using Link Management Protocol (LMP) and to register/resolution these addresses using Lightweight Directory Access Protocol (LD... 详细信息

关键词： ASON et on A Novel Approach for TNA Address Management for OIF link LDAP LMP TNA

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Study of dual-polarization OQAM-OFDM PON with direct detection

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Optoelectronics Letters 2016年第1期12卷 65-68页

作者：罗清龙冯敏白成林胡卫生 Key Laboratory of Optical Communications Science & Technology in Shandong Province College of Physics Science and Information EngineeringLiaocheng University State Key Lab.of Advanced Optical Communication Systems and Networks Shanghai Jiao Tong University

An offset quadrature amplitude modulation orthogonal frequency-division multiplexing(OQAM-OFDM) passive optical network(PON) architecture with direct detection is brought up to increase the transmission range and improve the system *** optical line terminal(OLT),OQAM-OFDM signals at 40 Gbit/s are transmitted as *** each optical network unit(ONU),the optical OQAM-OFDM signal is demodulated with direct *** results show that the transmission distance can exceed 20 km with negligible penalty under the experimental conditions.

关键词： Amplitude modulation Frequency division multiplexing optical fiber communication Passive optical networks Quadrature amplitude modulation Signal detection

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A Demonstration of Automatically Switched optical network

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光学学报 2003年第S1期23卷 669-670页

作者： Weisheng Hu, Yaohui Jin, Chun Jiang, Yue Wang, Xiaodong Wang, Chunlei Zhang, Yang Lu,Buwei Xu, Peigang Hu, Qingji Zengstate key lab of advanced optical communication systems and networks, Shanghai Jiao Tong University, P. R.China, Tel: 86-21-62932029, E-mail: wshu@*** State Key Lab of Advanced Optical Communication Systems and Networks Shanghai Jiao Tong University P. R.China

We build an automatically switched optical network (ASON) testbed with four optical cross-connect nodes. Many fundamental ASON features are demonstrated, which is implemented by control protocols based on generalized ... 详细信息

关键词： GMPLS ASON A Demonstration of Automatically Switched optical network OXC of link

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A new prediction method at the edge of optical burst switching network

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Chinese Optics Letters 2005年第4期3卷 199-201页

作者：隋志成曾庆济肖石林 State Key Lab of Advanced Optical Communication Systems and NetworksShanghai Jiao Tong University Shanghai 200030

To achieve lower assembly delay at optical burst switching edge node, this paper proposes an approach called current weight length prediction (CWLP) to improve existing estimate mechanism in burst assembly. CWLP method takes into account the arrived traffic in prediction time adequately. A parameter 'weight' is introduced to make a dynamic tradeoff between the current and past traffic under different offset time. Simulation results show that CWLP can achieve a significant improvement in terms of traffic estimation in various offset time and offered load.

关键词： SNR time A new prediction method at the edge of optical burst switching network length node CLP OBS

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Computing Power in the Sky: Digital Twin-assisted Collaborative Computing with Multi-UAV networks

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IEEE Transactions on Vehicular Technology 2025年

作者： Wang, Chao Han, Yu Zhang, Long Jia, Ziye Zhang, Hongliang Hong, Choong Seon Han, Zhu Hebei University of Engineering School of Information and Electrical Engineering Handan056038 China Qilu University of Technology Shandong Academy of Sciences Key Laboratory of Computing Power Network and Information Security Ministry of Education Jinan250014 China Nanjing University of Aeronautics and Astronautics College of Electronic and Information Engineering Nanjing211106 China Southeast University National Mobile Communications Research Laboratory Jiangsu Nanjing211111 China Peking University State Key Laboratory of Advanced Optical Communication Systems and Networks School of Electronics Beijing100871 China Kyung Hee University Department of Computer Science and Engineering Gyeonggi-do Yongin-si17104 Korea Republic of University of Houston Department of Electrical and Computer Engineering HoustonTX77004 United States Kyung Hee University Department of Computer Science and Engineering Seoul446-701 Korea Republic of

The collaboration of computing powers (CPs) among unmanned aerial vehicles (UAVs)-mounted edge servers is essential to handle data-intensive tasks of user equipments (UEs). This paper presents a multi-UAV computing power network (CPN) that orchestrates the CP resources of edge servers to cooperatively process tasks through collaborative computing. Due to the frequent interactions among edge servers and the increased complexities for large-scale task executions, we propose a digital twin (DT)-driven multi-UAV CPN framework, where the aerial DT network is created as a digital replica of the multi-UAV network to assist collaborative computing. A joint optimization problem of the service association, offloading power control, task partitions, CP allocation, and UAV trajectory design is formulated to minimize the long-term average delay of UEs. We use the Lyapunov technique to tackle the long-term energy constraint, forming a tractable optimization problem, which is modeled as a Markov decision process to balance the UAV's deficit queue stability and the UE's task completion delay. A hybrid soft actor-critic based deep reinforcement learning algorithm is developed to optimize the joint design by sampling the hybrid action from the Gumbel and Gaussian distributions. Simulation results verify that the multi-UAV CPN contributes to significant performance gains when supported by DTs. © 2025 IEEE.

关键词： Markov processes

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An insertion loss balance aware routing scheme in photonic network on chip

An insertion loss balance aware routing scheme in photonic n...

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7th International Conference on Information, communications and Signal Processing, ICICS 2009

作者： Chang, Zhijuan Tang, Jianxiong Jin, Yaohui State Key Lab. of Advanced Optical Communication System and Network Shanghai Jiao Tong University Shanghai 200240 China

ISBN: (纸本)9781424446575

The paper presents a novel energy efficient routing scheme for photonic network on chip (PNoC) based on the micro-resonator which takes the insertion loss and the path-setup latency into consideration in order to design a high performance per watt multi-processors. The path-setup latency is a major contributor to the whole system's latency that has something to do with queuing. And insertion loss which has impact on power consumption is closely related to the number of micro-resonators in on state. To solve the multi-objective optimization problem, we design a straight line first heuristic routing scheme. The goal of this routing scheme is to reduce the path-setup latency and insertion loss. Simulation results show that this scheme can low the latency with lower the insertion loss as little as possible. ©2009 IEEE.

关键词： Insertion losses

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Trajectory pattern change analysis in campus WiFi networks 2

Trajectory pattern change analysis in campus WiFi networks

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2nd ACM SIGSPATIAL International Workshop on Mobile Geographic Information systems, MobiGIS 2013, held in conjunction with the 21st ACM SIGSPATIAL International Conference on Advances in Geographic Information systems, GIS 2013

作者： Gong, Wenjuan Chen, Xiaming Qiang, Siwei Jin, Yaohui State Key Lab of Advanced Optical Communication System and Network Shanghai China Shanghai Jiao Tong University Shanghai China

ISBN: (纸本)9781450325318

Mobile devices equipped with geo-location modules facilitate researches on the nature of human mobility. While valuable contributions have been made to discover trajectory patterns from movement history, there are still not a comparative amount of works specialized in analyzing how trajectory patterns change over time. In this paper, we facilitate this problem in a systematic and quantified manner as identifying potential change points of user trajectory patterns extracted from successive time intervals. Specifically, we present a unified, information-based measure to quantify pattern changes between two intervals, and perform a Bayesian analysis on a sequence of aggregate measures for each individual interval to detect the actual change points. Experimenting on a three-month long dataset in real campus WiFi networks, we show that our approach is effective to identify trajectory pattern changes in practice with a discussion on the impact of internal parameters of proposed model on detection performance. Furthermore, we also inspect external factors influencing user mobility in reality by associating trajectory pattern changes with public events, and there shows an interesting connection between group pattern changes and real-world principles such as the weekday calendar or public events such as the May Day holiday. © 2013 ACM.

关键词： Trajectories

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