A data transmission method and device based on a time-triggered mechanism

Abstract

A data transmission method and device based on a time triggered mechanism. In the method, request packets transmitted by nodes connected to a switching device is received by same, and the length of time corresponding to time slices is determined on the basis of the total bandwidth of communication links to a network node and of acquired information on the total number of bytes comprised by packets-to-be-transmitted by the nodes within one scheduling time cycle; a time cycle schedule table is determined on the basis of the determined length of time corresponding to the time slices and of the information on the total number of bytes comprised by the packets-to-be-transmitted by the nodes; and, the packets of the nodes are forwarded to the network node on the basis of the time cycle schedule table. In the present invention, the switching device employs, on the basis of data transmission requirements of the nodes, the time triggered mechanism to schedule the nodes by formulating the time cycle schedule table, and prevents the problem that some of the packets cannot be processed timely, thus effectively increases the degree of security of service processing.

Description

technical field [0001] The invention relates to the technical field of node data communication in industrial Ethernet, in particular to a data transmission method and device based on a time-triggered mechanism. Background technique [0002] Industrial Ethernet is an Ethernet technology applied in the field of industrial control. Industrial Ethernet has outstanding performance in real-time, reliability, anti-interference, and operability. High communication rate is one of the outstanding features of industrial Ethernet. At present, 100M and Gigabit Ethernet have been widely used, and 1Gb / s Ethernet technology has gradually matured. Compared with the traditional fieldbus with a maximum communication rate of only 12Mb / s. Industrial Ethernet is more suitable for industrial control networks that require increasing bandwidth. [0003] Industrial Ethernet technology is widely used in industries such as smart grid, rail transit, and mining transportation, mainly because these indus...

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Problems solved by technology

[0006] In view of this, the embodiment of the present invention provides a data transmission method and device based on a time-triggered mechanism to solve the problem that the data transmission operations of nodes are triggered by the occurrence of events in the existing industrial Ethernet. As a result, some messages sent by nodes cannot be processed in time, which makes the business less secure

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