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In large network environment, in the application of Etrust Intrusion Detection and Netflow Analysis, we need to solve the following problems: data type and acquisition method. An overall comparison between 4 current netflow acquisition technologies based on flow is made in this paper from network application level, flow data comprehensiveness, data acquisition protocol, installation and deployment...
In the simulation of power electronic devices, the high-power switching devices, such as IGBT and IGCT, has been treated as an ideal switching device due to its fast switching characteristics and complex electromagnetic characteristics. Although the ideal model has the best switching characteristics, the switching losses of the real device working in high-frequency can not be ignored. This paper discussed...
The benefits of utilizing service oriented architectures (SOA) in industrial automation are well recognized. Nevertheless these architectures imply connection establishments and message exchanges with a large amount of overhead which is inappropriate when considering the real time characteristics of an industrial application. Furthermore, wireless sensor networks (WSNs) which are often part of such...
The PROFINET IEC 61158 standardized Real Time Ethernet (RTE) protocol, Class C, has traditionally been limited by an artificially imposed 250us cycle time, originating from the requirement to ensure that full-sized legacy Ethernet frames can be transmitted in a single cycle through a network. Occasionally, especially in the case of high performance motion-control systems, this minimum cycle time is...
The application of Switched Ethernet is becoming more and more popular on the platforms of ships and aircrafts. On such specific platforms, Switched Ethernet is greatly appreciated by its low-cost and flexibility, meanwhile, its real-time performance is greatly challenged. Therefore, evaluation of Switched Ethernet's performance, that is, a reliable analysis on its real-time performance, plays a very...
We propose in this paper, a timing analysis of dynamic partial reconfiguration (PR) applied to a NoC (network on chip) structure inside a FPGA. In the context of a SDR (software defined radio) example, PR is used to dynamically reconfigure a baseband processing block of a 4G telecommunication chain running in real-time (data rates up to 100 Mbps). The results presented show the validity of our methodology...
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,...
Switched Ethernet is being used for real time transmissions in industrial automation more and and more. Most modern industrial switches are equipped with mechanisms to deal with time predictability. However, real-time transmission not only requires these mechanisms, but also the proper policies for managing network resources. This paper proposes the use of contracts. A contract is a set of transmission...
High reliability and real-time performance is a must in the industrial control networks. This article discussed both advantages and disadvantages of traditional fieldbus, then the open standard Ethernet technology was introduced. By discussing the disadvantage of applying commercial Ethernet to industrial control networks, this article analyzed two methods to improve the reliability and real-time...
Real-Time Services (RTS) will rely on distributed capabilities to enable end-to-end management of IP based voice and video services across multiple domains. Policy Based Enterprise Management (PBEM) will be a key RTS enabler by coordinating and automating management processes among domains. This will facilitate effective distributed management of RTS services across the enterprise. For example, PBEM...
This paper shows the results from a study on data transmission with different characterization (best-effort, high-priority best-effort and two types of real time traffic) through the switching protocol for multi-protocol labels in IP networks, compared to the IP data transmission using the asynchronous transfer mode. This study illustrates the best performance the MPLS shows under a network congestion...
This paper presents the RCP (reconfigurable hardware-software codesign platform incorporating real-time task management technique) for hardware-software codesign of network protocols in SoC (system-on-chip) based system. In the RCP, we decompose a network protocol suite into real-time application-specific and reconfigurable hardware and software tasks. Such a task decomposition technique can improve...
Next generation wireless networks will encompass a wide range of heterogeneous technologies in the radio access part. In such networks, the all-IP paradigm has been identified as a promising solution that will contribute benefits by providing IP-based transport through the radio and core network parts. However, this concept requires a precise management of the userpsilas mobility, especially in order...
In this paper, we propose a novel error concealment algorithm for intra frames of h.264/AVC. By using the high correlation of adjacent frames sequence, the proposed algorithm performs quadratic interpolation to the error pixel value of the concealed intra frame from the corresponding pixels of the previously decoded frame and the adjacent blocks received correctly while remaining the least distortion...
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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