The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
Modern in-vehicle networks are comprised of heterogeneous systems that use various communication protocols with different source clocks. Moreover, gateway systems are designed with additional features that ensure converted/forwarded data meet real-time constraints. In this paper, we propose a synchronization mechanism for FlexRay and Ethernet audio video bridging (AVB) network that guarantees a high...
We investigated the performance of the IEEE 802.1AS time synchronization protocol and its usage in in-vehicle networks by assessing the precise time synchronization mechanisms, such as offset correction, rate correction and the automatic optimal sync message period. In particular, this paper presents a method for adjusting the optimal synchronization message period to achieve high-precision time synchronization...
Network-based control systems are becoming increasingly popular for industrial applications; however, in these systems, it is impossible to transmit a control command to multiple devices at the same time due to network latency. The network latency of each device varies depending on network topology, which makes synchronous control difficult. In order to address this problem, this paper proposes a...
This paper presents the time synchronization performance of the IEEE 802.1AS standard using a hardwareassisted time stamp. The IEEE 802.1AS standard describes a time synchronization protocol that is part of Ethernet audio/video bridge (AVB) that is expected to be implemented in a wide variety of multimedia and infotainment applications of automotive systems.
Mechatrolink-III is a real-time Ethernet protocol designed to achieve high performance with short cycle time. The Mechatrolink-III protocol includes five communication phases: synchronization, cyclic communication, retry communication, C1 master message communication, and C2 master message communication. These communication phases directly affect the cycle time of Mechatrolink-III. This paper analyzes...
Ethernet based communication protocols have recently gained more importance. The IEEE 1588 standard is the most widely used synchronization algorithm for Ethernet based communication protocols. The IEEE 1588 standard uses the centralized synchronization method. In this case, the malfunction of a specific node that sends the master clock can affect the performance of synchronization of every node on...
The Ethernet-based network protocol is widely using in industrial environments. Its advantages include high speed, high performance, operation over long distances, and better interoperability. A number of techniques are used to implement the Ethernet protocol for the needs of industrial processes that must provide real time processes. This paper analyses network performance of an Embedded system based...
We measured synchronization performance of FlexRay for OSEKtime and described why we must consider synchronization performance. Previous studies present scheduling methods for time-triggered systems when ideal constraints WCET(Worst Case Execution Time), deadline, resource dependency, etc.) are given. However, there are some differences between real distributed systems and ideal constraints. Because...
It is very important to communicate between the many electronic components in automobiles. If any component has an error, is possible for the error to affect other components. We propose a method of handling cyclic redundancy check (CRC) errors in the network using FlexRay. The FlexRay vehicle network protocol features fault-tolerance and guaranteed message latency. According to the FlexRay specification,...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.