A high-efficiency and high-bandwidth communication method and system

Abstract

The present invention provides a high-efficiency and high-bandwidth communication method. The method is applied to a high-efficiency and high-bandwidth communication system. The communication system includes: several communication devices, and each communication device is provided with a unique physical ID; And communicate periodically through the communication link; the method includes: the communication device sends data frames successively according to the level of data priority in each communication cycle; when the device sends the data frame, the data frame Declare whether there is data to be sent in the next communication cycle, and inform the data priority; in each communication cycle, the device that has no data to send will declare whether there is data in the next communication cycle after other devices that have data to send have finished sending. The data to be sent and the priority of the data; each device determines the data sending time point of its own device in the next communication cycle after obtaining the physical ID of the sender of all data frames in the communication cycle and the corresponding priority of the data to be sent .

Description

technical field [0001] The invention belongs to the field of communication and industrial control automation, and in particular relates to an efficient and high-bandwidth communication method and system. Background technique [0002] There are many kinds of existing industrial network communication buses and mechanisms. Typical mechanisms include master-slave communication, arbitration communication and distributed communication, such as POWERLINK, CAN, EPA and so on. However, these communication buses cannot fully utilize the network bandwidth due to mechanism limitations. POWERLINK uses a master-slave question-and-answer mechanism for communication. Each data interaction requires a handshake and question-and-answer process between the master and the slave. As a result, a data interaction requires two round-trip data transmissions, and only half of the bandwidth data is valid data. CAN adopts an arbitration mechanism, and there is uncertainty. Equipment arbitration backoff...

AI Technical Summary

Problems solved by technology

The method of sending according to a fixed time slice has the above-mentioned defects of EPA distributed communication. At the same time, the device can only send in order, and there is no way to dynamically adjust the order of data with different priorities.

In addition, due to the time-sharing scheduling mechanism of this method, all devices need to be strictly synchronized. If the synchronization fails, communication will collide

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