Adaptive method of communication rate

Abstract

The invention discloses a self-adaptation method of communication rate. The self-adaptation method of the communication rate comprises a step of ensuring that the connection of the network between a master station and N slave stations is normal, a step of setting that the master station communicates with the N slave stations with a preset rate and calculating score of communication efficiency of each slave station, a step of adjusting gear shifts of communication rate between the master station and each slave station to enable the score of communication efficiency of each slave station to be lower than preset communication efficiency threshold value, a step of choosing gear shifts of communication rate of next round according to the score of communication efficiency which corresponds to the situation that the communication efficiency score of each slave station is lower than the preset communication efficiency threshold value, a step of communication between the master station and the N slave stations with the gear shifts, chosen from the previous step, of the communication rate of the next round and calculating corresponding scores of the communication efficiency, a step of screening out and classifying the slave station which has lower score of the communication efficiency than the preset communication efficiency threshold value as a speed-to-be-measured-station of a following round. By means of the method, the best communication rate between each slave station and the master station can be chosen according to real time communication channel conditions between each slave station and the master station.

Description

technical field [0001] The invention relates to the technical field of communication, in particular to an adaptive method of communication rate. Background technique [0002] In the field of industrial automatic control, serial buses are widely used, especially the RS-485 bus, which is widely used due to its advantages of long transmission distance, strong anti-interference, low cost, and simple connection. In the RS-485 wiring network, if there is a master station and multiple slave stations, the asynchronous communication rate of the serial bus is generally set to a fixed rate, and each slave station communicates with the master station at this fixed rate, even if it is The closer slave stations cannot independently increase the communication rate with the master station, so that the communication efficiency is reduced and the bus utilization rate is reduced. [0003] Therefore, it is necessary to provide an adaptive method of communication rate to solve the above problem...

AI Technical Summary

Problems solved by technology

In the RS-485 wiring network, if there is a master station and multiple slave stations, the asynchronous communication rate of the serial bus is generally set to a fixed rate, and each slave station communicates with the master station at this fixed rate, even if it is The closer slave stations cannot independently increase the communication rate with the master station, so that the communication efficiency is reduced and the bus utilization rate is reduced.

Images