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A Dual-Channel Secure Transmission Scheme for Internet-Based Networked Control Systems 认领 引用
1
作者 田德振 戴亚平 +1 位作者 胡敬炉 平泽宏太郎 《Journal of Beijing Institute of Technology》 EI CAS 2010年第2期183-190,共8页
Two significant issues in Internet-based networked control systems （ INCSs）, transport performance of different protocols and security breach from Internet side, are investigated. First, for improving the performanc... Two significant issues in Internet-based networked control systems （ INCSs）, transport performance of different protocols and security breach from Internet side, are investigated. First, for improving the performance of data transmission, user datagram protocol （UDP） is adopted as the main stand for controllers and plants using INCSs. Second, a dual-channel secure transmission scheme （DCSTS）based on data transmission characteristics of INCSs is proposed, in which a raw UDP channel and a secure TCP （transmission control protocol） connection making use of SSL/TLS （secure sockets layerransport layer security） are included. Further, a networked control protocol （NCP） at application layer for supporting DCSTS between the controllers and plants in INCSs is designed, and it also aims at providing a universal communication mechanism for interoperability of devices among the networked control laboratories in Beijing Institute of Technology of China, Central South University of China and Tokyo University of Technology of Japan. By means of a networked single-degree-of-free- dom robot arm, an INCS under the new protocol and security environment is created. Compared with systems such as IPSec or SSL/TLS, which may cause more than 91% network throughput deduction, the new DCSTS protocol may yield results ten times better, being just 5.67%. 展开更多
关键词 Internet-based networked control system （INCS） networked control protocol（NCP） dual-channel secure transmission scheme（DCSTS）
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MULTIPLE ELECTRONIC CONTROL UNITS CALIBRATION SYSTEM BASED ON EXPLICIT CALIBRATION PROTOCOL AND J1939 PROTOCOL 认领 引用 被引量：4
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作者 YANG Shiwei ZHU Keqing +2 位作者 XU Quankui YANG Lin ZHUO Bin 《Chinese Journal of Mechanical Engineering》 SCIE EI CAS 2008年第1期42-46,共5页
The rising number of electronic control units(ECUs)in vehicles and the decreasing time to market have led to the need for advanced methods of calibration.A multi-ECU calibration system was developed based on the expli... The rising number of electronic control units(ECUs)in vehicles and the decreasing time to market have led to the need for advanced methods of calibration.A multi-ECU calibration system was developed based on the explicit calibration protocol(XCP)and J1939 communication protocol to satisfy the need of calibrating multiple ECUs simultaneously.The messages in the controller area network(CAN)are defined in the J1939 protocol.Each CAN node can get its own calibration messages and information from other ECUs,and block other messages by qualifying the CAN messages with priority,source or destination address.The data field of the calibration message is designed with the XCP,with CAN acting as the transport layer.The calibration sessions are setup with the event-triggered XCP driver in the master node and the responding XCP driver in the slave nodes.Mirroring calibration variables from ROM to RAM enables the user to calibrate ECUs online.The application example shows that the multi-ECU calibration system can calibrate multiple ECUs simultaneously,and the main program can also accomplish its calculation and send commands to the actuators in time.By the multi-ECU calibration system,the calibration effort and time can be reduced and the variables in ECU can get a better match with the variables of other ECUs. 展开更多
关键词 Electronic control unit(ECU) Calibration Explicit calibration protocol(XCP) J1939 communication protocol Controlled area network(CAN)
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Development and Verification of Simulation Model Based on Real MANET Experiments for Transport Layer Protocols (UDP and TCP) 认领 引用 被引量：3
3
作者 Joarder Mohammad Mustafa Kamal Mohammad Shahidul Hasan +1 位作者 Alison L. Griffiths Hongnian Yu 《International Journal of Automation and computing》 CSCD 2013年第1期53-63,共11页
There is a lack of appropriate guidelines for realistic user traces, mobility models, routing protocols, considerations of real-life challenges, etc. for general-purpose mobile ad hoc networks （MANET）. In this paper... There is a lack of appropriate guidelines for realistic user traces, mobility models, routing protocols, considerations of real-life challenges, etc. for general-purpose mobile ad hoc networks （MANET）. In this paper, four laptops are used in an open field environment in four scenarios to evaluate the performances of Internet control message protocol （ICMP） based ping and transmission control protocol （TCP） based streaming video applications using optimised link state routing （OLSR） implementation in an IEEE 802.11g wireless network. Corresponding simulations are developed in Network Simulator ns-2 by setting simulation parameters according to the real experiments. Difficulties faced to regenerate real-life scenarios have been discussed and the gaps between reality and simulation are identified. A setup guideline to produce realistic simulation results has been established. 展开更多
关键词 Mobile ad-hoc networks （MANET） real-life experiment Internet control message protocol （ICMP） user datagram protocol （UDP） transmission control protocol （TCP） optimised link state routing （OLSR） ns-2
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An Arrangement of Channels and Transceivers in Optical Packet Switching Networks 认领 引用
4
作者 Ming Hu 《Journal of Electronic Science and Technology of China》 2008年第1期5-9,共5页
Based on a media access and control（MAC）protocol,an arrangement of channels and transceivers in optical packet switching dense wavelength division multiplexing（DWDM）networks is proposed in this paper.In order to r... Based on a media access and control（MAC）protocol,an arrangement of channels and transceivers in optical packet switching dense wavelength division multiplexing（DWDM）networks is proposed in this paper.In order to reduce the cost of nodes,fixed transmitters and receivers are used instead of tunable transmitters and receivers.Two fixed transmitters and many fixed receivers are used in each node in the scheme.The average waiting delay of this scheme is analyzed through mathematics and computer simulation.The result shows that the property of the scheme is almost the same as using tunable transmitter and receiver.Furthermore,if the tuning time of tunable transmitters is taken into account,the performance of the tunable transmitter scheme is poor than this scheme at the average waiting delay and throughput of the network. 展开更多
关键词 Dense wavelength division multiplexing（DWDM） media access and control （MAC） protocol,optical packet switching network transmitter and receiverarrangement tuning time.
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GMPLS: IP-Centric Control Protocols for Optical Networks(Tutorial) 认领 引用 被引量：1
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作者 Yaohui Jin Weisheng Hu 《光学学报》 EI CAS 北大核心 2003年第S1期663-664,共2页
Recent advances in optical networking technologies, particularly DWDM and MEMS, promise the transmission and switching of huge bandwidth capacity. The carriers have convinced of that their revenue must be earned from ... Recent advances in optical networking technologies, particularly DWDM and MEMS, promise the transmission and switching of huge bandwidth capacity. The carriers have convinced of that their revenue must be earned from efficient bandwidth management instead of unsophisticated increase in capacity. The distributed control plane can offer more flexibility, reliability and scalability, whose functions include addressing, resource and topology discovery, route computation, provisioning and restoration. Genera... 展开更多
关键词 GMPLS for IP-Centric Control Protocols for Optical Networks Tutorial
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