Method for high-performance data transfer in a data network with, in part, real-time requirements and device for carrying out the method

A high-performance, network technology, applied in transmission systems, electrical components, etc., can solve the problem that the performance of AVB system is not enough to meet the delay requirements of industrial applications

Active Publication Date: 2020-03-06
SIEMENS AG
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The performance of AVB networks is sufficient for audio and video applications, but the performance of AVB systems is not sufficient for the latency requirements of industrial applications

Method used

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  • Method for high-performance data transfer in a data network with, in part, real-time requirements and device for carrying out the method
  • Method for high-performance data transfer in a data network with, in part, real-time requirements and device for carrying out the method
  • Method for high-performance data transfer in a data network with, in part, real-time requirements and device for carrying out the method

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Embodiment Construction

[0070] image 3 and Figure 4 An exemplary transmission of data frames F1 , F2 , . . . , Fm from a sender 1 . The transmission takes place via several hops B0, B1, . . . Bn in the network and is respectively followed by a slight delay (forwarding delay D1, D2, . . . Dn). During the transmission, further time slots G1, G2 between two data frames can also occur, which are also included in the total transmission time MS of the data stream. In this case, the total transmission time MS is smaller than the transmission time window RW reserved for the transmission of the data stream. It can be seen that there is a time delay, also called forwarding delay FDxn, between the first feed of data packets at the first switching point B0 and the first feed of data packets at the last bridge Bn.

[0071] The total transmission time MS consists of this forwarding delay FDxn+burst length BL.

[0072] image 3 An exemplary embodiment is shown in which packets are forwarded in a store-and-fo...

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Abstract

The invention relates to a method and to a device that describe a real-time network plan for industrial control and monitoring applications, wherein standard Ethernet switching elements are used for the communication network, in particular on the basis of the new mechanisms according to the IEEE 802.1 TSN Task Group. The sequence plan combines clocked data transfer with the stream reservation concept and thus provides determinism with guaranteed maximum latency and access controls at runtime.

Description

Background technique [0001] Industrial applications, such as distributed IO systems in industrial automation, depend on the availability and reliability of deterministic data transmission. This means that the data to be transmitted should reach the recipient as real-time, reliably and with low latency as possible. The data transmission in these networks is characterized here in particular by the fact that small, predictable data volumes can be transmitted at regular intervals in a pre-programmable manner, for example to transmit measured values ​​from sensors or control commands to industrial plants in the executor. The amount of data is usually combined into a burst (Burst), or also called a stream, that is, a collection of multiple data frames. [0002] In the past, hardware specially developed for this purpose and used in industrial environments has been used to construct industrial networks, preferably in a BUS topology, ie a topology in which all participants are connec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L29/08H04L47/56H04L47/80
CPCH04L67/12H04L47/56H04L47/72H04L47/801H04L47/805
Inventor 陈峰弗朗茨-约瑟夫·格茨马塞尔·基斯林安·宁赫·恩固因于尔根·施米特
Owner SIEMENS AG
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