Data transmission bus system, device and method

Abstract

The invention discloses a data transmission bus system, device and method, and the bus comprises at least two groups of data buses for transmitting to-be-transmitted data; the arbitration bus is usedfor transmitting the multi-system symbol; and the node controller is used for comparing the multi-system symbol with the voltage on the arbitration bus, outputting the multi-system symbol to the arbitration bus and sending the to-be-sent data to the data bus. The device comprises a data module for data transmission; the arbitration module is used for arbitrating information transmission; and the node control module is used for outputting the multi-valued logic level to the arbitration bus module and sending data needing to be sent to the data bus module through the node control module. The method comprises the following steps: converting an arbitration signal into a multi-valued logic level; outputting to an arbitration bus; obtaining arbitration priority; obtaining right to use data bus.According to the data transmission bus system, device and method provided by the invention, the arbitration efficiency of the bus is improved, and the data transmission rate of the bus is increased.

Description

technical field [0001] The present invention relates to the technical field of data transmission, in particular to a data transmission bus system, device and method. Background technique [0002] Point-to-point communication refers to a dedicated communication link between two systems or processes. The two systems exclusively occupy this line for communication. Its control is simple and the transmission efficiency is high. However, in practical applications in many fields, if point-to-point communication is used between various devices, the application cost will be too high due to too many communication lines. At the same time, too many lines will affect the design of the entire system, and it is not conducive to the expansion of system equipment. [0003] Therefore, in practical applications, the communication between devices mostly adopts the form of bus, that is, each device shares a communication line for data transmission, which greatly saves costs and simplifies system...

AI Technical Summary

Problems solved by technology

Since each device shares a communication line, there will be a problem of data transmission collision. Usually, the right to use the communication line is allocated through the transmission of arbitration signals for priority arbitration. Since there is only one communication line, the probability of collision is high, resulting in communication failures. The efficiency of the line is very low

At the same time, due to the round-trip delay in the transmission of the arbitration signal, the transmission rate of the arbitration signal cannot be too high, and the data transmission and the arbitration signal are transmitted on the same communication line, resulting in a very low data transmission rate of the communication line.

And the arbitration signal is transmitted through binary symbols, that is, through the symbols "0" and "1". Using binary symbols for priority arbitration, the arbitration efficiency is too low, and the queuing time of the equipment is long

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