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Distributed control can achieve good control performance with fast response speed, it will be the development trend of protection and control applications in distribution network. Real-time data fast transmission technology is a key supporting technology for distributed control. A transmission scheme (GOOSE over UDP) based on UDP(User Datagram Protocol) to transmit GOOSE real-time message is proposed...
Cyber-Physical Production Systems are characterized by integrating sensors, processing and communication in Industrial Environments like in advanced manufacturing plants or in the new generation Smart Grids. In these context, the accuracy on the synchronization plays a vital role because it is the base for control operations and for the correlation among the distributed sensor data sampling. In this...
In this paper an architecture for High-Availability Cyber-Physical Production Systems with sub-microsecond synchronization capabilities is presented. The proposed CPPS nodes are based on cost-affordable components. These CPPS can deal with most of the challenges set by Industry for a massive adoption of the distributed computing philosophy in critical systems like Smart-Grids or Advanced Manufacturing...
Nowadays, multiple sensor nodes are often incorporated into technical solutions forming distributed sensor systems. Herein, advanced detection mechanisms are often realised by using data from multiple sensors in such a network. However, sometimes active sensors — like Time-Of-Flight cameras — interfere with each other. To solve this problem and assist in data correlation, a clock synchronisation method,...
Based on intensive study of CAN & TCP/IP protocol, an active atmospheric boundary layer(ABL) simulator for wind tunnel test was developed, the multi-axes in-phase and multi-locomotion control was achieved. The experiment results show that the high controlling precision, fast responses, good performance and stability can be found in this system.
IP traceback can be used to find the origins and paths of attacking traffic. However, so far, most approaches for IP traceback are hard to be deployed in the Internet because of deployment difficulties. In this paper, we present an incrementally deployable approach based on sampled flows for IP traceback (SampleTrace). In SampleTrace, it is not necessary to deploy any dedicated traceback software...
With the emergence of multimode terminals and the deployment of multiple access networks, users are expecting ubiquitous and seamless connectivity across heterogeneous networks when using IP-based applications. For bandwidth intensive IP-based application such as Internet Protocol Television (IPTV), the multimedia contents are usually transmitted via multicast delivery for reason of efficiency. However,...
The goal is to distribute UTC(CH) in a remote location via TCP/IP. The MC (Master Clock) is locked to UTC(CH) via a combination of IRIG-B and 1-PPS signals. The SC (Slave Clock) is controlled by a PI control loop that tracks the MC. The SC-MC clock offset and the transmission delay are estimated simultaneously by means of a TW (Two-Way) comparison process similar to NTP but based on TCP/IP.
We report on a Synchronous Ethernet based clock distribution and timestamp synchronization implementation over 1000BASE-T (Gigabit over twisted pair) Ethernet. A central 125 MHz global clock is distributed to all detector modules using only commercial off-the-shelf components. The timestamps generated on different modules has a maximum fixed offset of 24-60 ns (depending on the switch tested), and...
Targeting the distribution of accurate frequency and time references across Packet Switched Networks (PSNs), the IEEE Std 1588™-2008 (a.k.a. 1588V2 or PTPV2) standard specifies network infrastructure components intended to reduce the impact of network elements located between the Grandmaster clock and Slave clocks. Also referred to as On-Path Supports (OPS), these PTPV2 build-in network components...
Based on the principle of Pipeline ADC, a 10-bit, 50-MS/s pipeline A/D converter is presented in this paper. Combining with bootstrap circuit and bottom-plate sampling technology, a high linearity on-chip sample-and-hold (S/H) is realized. This ADC is optimized for high static and dynamic performance applications in imaging and digital communications. It operates at 1.2 V power supply and achieves...
State of the art VLSI systems are characterised by their small, deca-nano feature size. In order to accommodate the complexity and scalability, a new design paradigm, system on chip (SoC) has been introduced. Performance and power of giga-scale SoC is ever more communication-dominated. However typical SoC communication infrastructure is based in standard buses and protocols which are difficult to...
A 118.4 GB/s multi-casting network-on-chip (MC-NoC) is developed as communication platform for a real-time object recognition processor. To support application-specific data transactions, the MC-NoC adopts the combination of hierarchical star and ring topology with the multi-casting capability. As a result, the proposed MC-NoC improves data transaction time and energy consumption by 20% and 23%, respectively,...
The specifications of the protocols supporting mobility - MIPv6, NEMO - centralize their key functionalities on the home agent, which represents a single point of failure. In the context of the French research project REMORA, we have developed a solution to make home agent-based mobility protocols more reliable against the home agent failures. This paper presents the design, the implementation and...
A set of SoC low power design methods is presented based system level, IP module level and gate level. These methods were applied to low power design of a SoC. The SoC power simulation results showed that the static and dynamic power of this SoC was quite low. The goals of the low power design methods applied on the design were achieved. The SoC has been implemented in 0.18 ??m COMS process, the area...
A fully power aware globally asynchronous locally synchronous network-on-chip circuit is presented in this paper. The circuit is arranged around an asynchronous network-on-chip providing a 17 Gbits/s throughput and automatically reducing its power consumption by activity detection. Both dynamic and static power consumptions are globally reduced using adaptive design techniques applied locally for...
Video-streaming can now be offered on third-generation (3G) mobile networks. Most research efforts have focused on video download. This paper presents a detailed study of challenges faced for successfully deploying applications requiring life video upload. Both subjective and objective qualities as well as the effects of mobility are analyzed on real 3G networks. Consequently, video profiles are identified...
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