Real-time transmission method and device of field layer bus architecture based on industrial Internet

Abstract

The invention relates to a real-time transmission method and device of a field layer broadband bus architecture based on the industrial Internet, belonging to the field of industrial communication. The field layer broadband bus architecture based on the industrial Internet comprises a bus controller, at least one bus terminal and a two wire bus; the bus controller and bus terminals are connected by the two wire bus to form a network; and the communication between the bus controller and any one bus terminal and the communication between the bus terminals are based on the OFDM technology, and non interference occurs between the sub carriers occupied by each bus terminal. The real-time transmission method of the field layer broadband bus architecture based on the industrial Internet comprises the following steps: the bus controller receives a fixed rate service sent by the bus terminal based on pre-assigned fixed rate service resource blocks; and in the variable rate business resource blocks, the resource blocks are assigned to the bus terminal variable rate service dynamically in real time. According to the invention, the OFDM technology is introduced to the industrial field bus, and the data service and the channel resources are divided, therefore, the reliability, high speed and real time of the data transmission is realized.

Description

technical field

[0001] The invention relates to the field of industrial communication, in particular to a real-time transmission method and device based on an industrial Internet field layer bus architecture. Background technique

[0002] The Industrial Internet is the result of the integration of global industrial systems and advanced computing, analysis, sensing technologies, and Internet connections. Fieldbus realizes data communication between industrial field devices and automation systems.

[0003] In the prior art, the field bus adopts single-carrier technology, such as CAN, PROFIBUS, etc., and the transmission bandwidth is relatively low, generally below 50 Mbits, resulting in a slow transmission rate. For example, for Ethernet buses such as Profinet, although compared with CAN and PROFIBUS, the transmission bandwidth is higher, but with the expansion of the industrial field scale, the industrial field devices are also complicated and numerous, and the field bus need...

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