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| 1 | Human detection based on motion object extraction and head–shoulder feature显示文摘 | Qing Ye Rentao Gu Yuefeng Ji | 2013 | Optik - International Journal for Light and Electron Optics2013，，： | 1 |
| 2 | Adaptability Analysis of Fluctuating Traffic for IP Switching and Optical Switching显示文摘The technological development of smart devices and Internet of Things(IoT)has brought ever-larger bandwidth and fluctuating traffic to existing networks.The analy⁃sis of network capital expenditure(CAPEX)is extremely important and plays a fundamen⁃tal role in further network optimizing.In this paper,an adaptability analysis is raised for IP switching and optical transport network(OTN)switching in CAPEX when the service bandwidth is fluctuating violently.This paper establishes a multi-layer network architec⁃ture through Clos network model and discusses impacts of maximum allowable blocking rate and service bandwidth standard deviation on CAPEX of IP network and OTN network to find CAPEX demarcation point in different situations.As simulation results show,when the bandwidth deviation mean rate is 0.3 and the maximum allowable blocking rate is 0.01,the hardware cost of OTN switching will exceed IP switching as the average band⁃width is greater than 6100 Mbit/s.When the service bandwidth fluctuation is severe,the hardware cost of OTN switching will increase and exceed IP switching as the single port rate is allowed in optical switching.The increasing of maximum allowable blocking rate can decrease hardware cost of OTN switching.Finally,it is found that Flex Ethernet(FlexE)can be used to decrease CAPEX of OTN switching greatly at this time. | LIAN Meng GU Rentao JI Yuefeng WANG Dajiang LI Hongbiao | 2021 | ZTE Communications2021，19，1： | 0 |
| 3 | Dual-layer efficiency enhancement for future passive optical network显示文摘Ever-increasing demands on bandwidth compel us to improve the bandwidth utilization of access networks. It is more important to enhance the efficiency of passive optical networks(PON) than other access technologies, as they are the primary solutions to various access scenarios. To satisfy the demands of improved bandwidth efficiency, we propose a dual-layer(data link layer and network layer) efficiency enhancement scheme for future PON system. Under this architecture, a data-link-layer flexible coding scheme is introduced to extend the downstream link throughput, and a network-layer centralized active queue management(AQM) scheme is introduced to increase bandwidth efficiency. Both of these technologies are designed to suit the future centralized cooperative control mode. The results of an experimental demonstration of the network coding PON scheme reveal the efficiency of the proposed architecture. The results of simulations show that the centralized AQM scheme has a positive influence on queuing delay and jitter. To the best of our knowledge, this is the first time that a data link layer mechanism and a network layer policy have been integrated to provide high efficiency and quality of service in access networks. | Yuefeng JI Xiaoxiong WANG Shizong ZHANG Rentao GU Tonglu GUO Zhaozhi GE | 2016 | Science China(Information Sciences)2016，59，2： | 0 |
| 4 | Parallel Optical Interconnect Technology: Combination of Higher Performance and Lower Energy Consumption显示文摘This paper analyzes the physical potential, computing performance benefi t and power consumption of optical interconnects. Compared with electrical interconnections, optical ones show undoubted advantages based on physical factor analysis. At the same time, since the recent developments drive us to think about whether these optical interconnect technologies with higher bandwidth but higher cost are worthy to be deployed, the computing performance comparison is performed. To meet the increasing demand of large-scale parallel or multi-processor computing tasks, an analytic method to evaluate parallel computing performance ofinterconnect systems is proposed in this paper. Both bandwidth-limit model and full-bandwidth model are under our investigation. Speedup and effi ciency are selected to represent the parallel performance of an interconnect system. Deploying the proposed models, we depict the performance gap between the optical and electrically interconnected systems. Another investigation on power consumption of commercial products showed that if the parallel interconnections are deployed, the unit power consumption will be reduced. Therefore, from the analysis of computing influence and power dissipation, we found that parallel optical interconnect is valuable combination of high performance and low energy consumption. Considering the possible data center under construction, huge power could be saved if parallel optical interconnects technologies are used. | Qiao Yaojun Gu Rentao Ji Yuefeng | 2010 | China Communications2010，7，3： | 0 |
| 5 | Artificial intelligence-driven autonomous optical networks: 3S architecture and key technologies显示文摘In the optical networks,the dynamicity,the complexity and the heterogeneity have dramatically increased owing to the deployment of advanced coherent techniques,and the optical cross-connect technologies and diverse network infrastructures pose great challenges in the optical network management and maintenance for the network operators.In this review,we propose a'3 S'architecture for AI-driven autonomous optical network,which can aid the optical networks operated in'self-aware'of network status,'self-adaptive'of network control,and'self-managed'of network operations.To support these functions,a number of artificial intelligence(AI)-driven techniques have been investigated to improve the flexibility and the reliability from the device aspect to network aspect.Adaptative erbium-doped fiber amplifier(EDFA)controlling is an example for the device aspect,which provides a power self-adaptive capability according to the network condition.From the link aspect,adaptive fiber nonlinearity compensation,optical monitoring performance and quality of transmission estimation are developed to monitor and alleviate the link-dependent signal impairments in an automatic way.From the network aspect,traffic prediction and network state analysis methods provide the self-awareness,while automatic resource allocation and network fault management powered by AI enhance the self-adaptiveness and self-management capabilities.Benefit from the sufficient network management data,powerful data-mining capability and matured computation units,these AI techniques have great potentials to provide autonomous features for optical networks,including the network resource scheduling and the network customization. | Yuefeng JI Rentao GU Zeyuan YANG Jin LI Hui LI Min ZHANG | 2020 | Science China(Information Sciences)2020，63，6： | 0 |
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