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Accelerating Data transfer in dataflow Architectures Through a Look-Ahead Acknowledgment Mechanism

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Journal of Computer Science & Technology 2022年第4期37卷 942-959页

作者：冯煜晶李德建谭旭叶笑春范东睿李文明王达张浩唐志敏 State Key Laboratory of Computer Architecture Institute of Computing TechnologyChinese Academy of SciencesBeijing 100190China Beijing Smartchip Microelectronics Technology Company Limited Beijing 100000China School of Computer and Control Engineering University of Chinese Academy of SciencesBeijing 100190China

The dataflow architecture,which is characterized by a lack of a redundant unified control logic,has been shown to have an advantage over the control-flow architecture as it improves the computational performance and power efficiency,especially of applications used in high-performance computing(HPC).Importantly,the high computational efficiency of systems using the dataflow architecture is achieved by allowing program kernels to be activated in a simultaneous manner.Therefore,a proper acknowledgment mechanism is required to distinguish the data that logically belongs to different contexts.Possible solutions include the tagged-token matching mechanism in which the data is sent before acknowledgments are received but retried after rejection,or a handshake mechanism in which the data is only sent after acknowledgments are received.However,these mechanisms are characterized by both inefficient Data transfer and increased area cost.Good performance of the dataflow architecture depends on the efficiency of Data transfer.In order to optimize the efficiency of Data transfer in existing dataflow architectures with a minimal increase in area and power cost,we propose a Look-Ahead Acknowledgment(LAA)mechanism.LAA accelerates the execution flow by speculatively acknowledging ahead without penalties.Our simulation analysis based on a handshake mechanism shows that our LAA increases the average utilization of computational units by 23.9%,with a reduction in the average execution time by 17.4%and an increase in the average power efficiency of dataflow processors by 22.4%.Crucially,our novel approach results in a relatively small increase in the area and power consumption of the on-chip logic of less than 0.9%.In conclusion,the evaluation results suggest that Look-Ahead Acknowledgment is an effective improvement for Data transfer in existing dataflow architectures.

关键词： dataflow model control-flow model high-performance computing application Data transfer power efficiency

Influence of data Clouds Fusion From 3D RealTime Vision System on Robotic Group Dead Reckoning in Unknown Terrain

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IEEE/CAA Journal of Automatica Sinica 2020年第2期7卷 368-385页

作者： Mykhailo Ivanov Oleg Sergyienko Vera Tyrsa Lars Lindner Wendy Flores-Fuentes Julio Cesar Rodriguez-Quinonez Wilmar Hernandez Paolo Mercorelli Universidad Autónoma de Baja California MexicaliB.C.21100Mexico Universidad de Las Américas Quito 170125Equador Leuphana University of Lueneburg Lüneburg 21335Germany

This paper proposes the solution of tasks set required for autonomous robotic group behavior optimization during the mission on a distributed area in a cluttered hazardous terrain.The navigation scheme uses the benefits of the original real-time technical vision system(TVS)based on a dynamic triangulation principle.The method uses TVS output data with fuzzy logic rules processing for resolution stabilization.Based on previous researches,the dynamic communication network model is modified to implement the propagation of information with a feedback method for more stable data exchange inside the robotic group.According to the comparative analysis of approximation methods,in this paper authors are proposing to use two-steps post-processing path planning aiming to get a smooth and energy-saving trajectory.The article provides a wide range of studies and computational experiment results for different scenarios for evaluation of common cloud point influence on robotic motion planning.

关键词： Data transfer group behavior machine vision navigation robotic group(RG) vision system

Combination of light-emitting diode positioning identification and time-division multiplexing scheme for indoor location-based service

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Chinese Optics Letters 2015年第12期13卷 12-17页

作者：刘翔杨爱英王雨冯立辉 School of Opto-electronics Beijing Institute of Technology National Science and Technology Venture Capital Development Center

A combination of light-emitting diode（LED） identification and a time-division multiplexing scheme is proposed in this Letter for indoor location-based service. With the scheme, the arrangement of white LED lamps and the structure of a data frame are designed to realize high-accuracy indoor positioning and location-based payload data transmission simultaneously. The results of the experiment demonstrate that the indoor positioning accuracy is 10 cm and 2 Mb/s data transmission with high signal quality is realized.

关键词： data communication systems Data transfer Indoor positioning systems Location Location based services Multiplexing Telecommunication services Time division multiplexing

High-speed phosphorescent white LED visible light communications without utilizing a blue filter

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Chinese Optics Letters 2015年第8期13卷 27-31页

作者：李洪磊张旖旎陈雄斌吴春晖郭俊清高宗余陈弘达 State Key Laboratory of Integrated Optoelectronics Institute of SemiconductorsChinese Academy of Sciences School of Computer and Communication Engineering University of Science and Technology Beijing

We experimentally demonstrate a high-speed phosphorescent white light emitting diode （LED） visible light communication （VLC） system without utilizing an optical blue filter. Here, the white light response is equalized by using the proposed analog equalizers. The 3 dB bandwidth of the VLC link could be extended from 3 to 132 MHz, which allows 330 Mbit/s non-return-to-zero on-off keying （NRZ-OOK） data transmission with a bit error ratio （BER） of 7,2 × 10^-10 and 672 Mbit/s 64-quadrature amplitude modulation （64-QAM） data transmission with a BER of 3.2 × 10^-3. These resultant BERs are less than the forward error correction （FEC） limit of 3.8× 10^-3. The VLC link distance is 1 m using a single 1 W LED. The transmitter and receiver modules are integrated to a compact size. Furthermore, the relationships between the signal performance and illumination level or optical power are investigated and analyzed.

关键词： Amplitude modulation data communication systems Data transfer Detector circuits Error correction Light Light emission Optical communication Phosphorescence Visible light communication

The Application Analysis of Concurrent Multipath transfer over Broadband Network

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电脑知识与技术 2016年第2Z期12卷 46-48页

作者：赵欢欢 College of Information Technology Engineering Tianjin University of Technology and Education

In the network for data transmission using CMT,there are multiple paths to choose,and the time delay of each path is not the same,there is a certain issue packet out-of-order.This article studied and analyzed the packet transmission in the sender,for each path assigned specific packet sequence number,in order to reduce the random sequence problem,improve the efficiency of network transmission.In the network for data transmission using CMT,there are multiple paths to choose,and the time delay of each path is not the same,there is a certain issue packet out-of-order.This article studied and analyzed the packet transmission in the sender,for each path assigned specific packet sequence number,in order to reduce the random sequence problem,improve the efficiency of network transmission.

关键词： Concurrent Multipath transfer Data transfer path selection buffer queue

Hierarchical Hybrid Routing Algorithm for Urban Public Transport

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Hierarchical Hybrid Routing Algorithm for Urban Public Trans...

Technical study of visible light wavelength division multiplexing using polymer optical fiber

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作者： Honglin Xie Ying Zhang College of Information Engineering Shanghai Maritime University

Vehicles have different features in the urban environment,while the traditional VANET treats all vehicle nodes equally and does not make good use of the characteristics of vehicles in the urban environment.Therefore,according to the urban public transport situation,this paper presents a hierarchical hybrid routing algorithm.Based on the traditional AODV routing,the fixed-routine vehicles such as buses and trams are used as the high-level architecture nodes,and the data bus mode is used for data transmission.When the number of the high-level node is scarce,the cars,roadside units and other low-layer nodes will help to forward or store the data temporarily.The algorithm also details the route discovery process and data forwarding.The simulation results show that the data transmission efficiency and end-to-end delay are obviously improved compared with the traditional VANET routing algorithms.

关键词： VANET Hierarchical Hybrid routing data bus mode AODV Data transfer

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Chinese Optics Letters 2005年第10期3卷 577-578页

作者：张永生马辉张涛王茁王东郑荣升杨海鹏明海 Department of Physics University of Science and Technology of China Hefei 230026

Visible light wavelength division multiplexing （VWDM） experiment was performed using polymer optical fiber （POF）. Lights of two different wavelengths （650 and 530 nm） were sent to a single POF. Red light （650 nm） was used for 100-Mb/s full duplex IP data transmission and green light （530 nm） was used for voice signal transmission. Light sources are light-emitting diodes （LEDs）. A POF coupler （splitter） and the prisms were employed as multiplexer and demultiplexer, respectively. The channel isolation and insert loss were measured, which are 20.5 and 17.65 dB for 650-nm channel respectively, and 19.16 and 20.55 dB for 530 nm one respectively.

关键词： Communication channels (information theory) Data transfer Light Light emitting diodes Light sources Polymers Signal processing Wavelength division multiplexing

Finite Element Simulation of Rod and Wire Continuous Rolling

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Journal of Shanghai Jiaotong university(Science) 2011年第2期16卷 195-198页

作者：张立文岳重祥原思宇阮金华顾森东高慧菊 School of Materials Science and Engineering Dalian University of Technology Dongbei Special Steel Group Corporation

This paper discusses the application of several techniques involved in the development of the 3D finite element (FE) models of rod and wire continuous rolling process.The FE models are implemented into the FE-program MSC.Marc and used to investigate the thermal and mechanical behavior of billet during the rolling process.All nonlinear equations included in the models are solved by the static and dynamic procedures,respectively.Data transfer technique is proposed to keep the continuity of simulation results.And the computational time of static procedure is significantly reduced by using a rigid pushing body.In all models,the constant time step method and the auto time step method are respectively used to define time step for the solution of equations.Simulation results of the models with different time step methods are compared.And comparison between calculated values and measured ones of the temperature at the surface of billet shows the validity of the FE models.

关键词： rod and wire rolling finite element (FE) simulation Data transfer auto time step

Implementation and design of a communication system of an agent-based automated substation

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Frontiers of Electrical and Electronic Engineering in China 2006年第4期1卷 396-399页

作者： LIN Yong-jun LIU Yu-tao ZHANG Dan-hui Industry Process Simulation and Control Laboratory North China Electric Power UniversityBaoding 071003China Department of Mathematic Application North China Electric Power UniversityBaoding 071003China

A substation system requires that communica-tion be transmitted reliably,accurately and in real-time.Aimed at solving problems,e.g.,flow confliction and sensi-tive data transmission,a model of the communication sys-tem of an agent-based automated substation is introduced.The running principle is discussed in detail and each type of agent is discussed further.At the end,the realization of the agent system applied to the substation is presented.The outcome shows that the communication system of an agent-based automated substation improves the accuracy and reliability of the Data transfer and presents it in real-time.

关键词： Data transfer substation automation agent system communication system