High-efficiency and high-bandwidth communication method and system

Abstract

The invention provides a high-efficiency and high-bandwidth communication method, which is applied to a high-efficiency and high-bandwidth communication system, the communication system comprises a plurality of communication devices, and each communication device is provided with a unique physical ID; communication is periodically carried out through a communication link; the method comprises thefollowing steps that: communication equipment sends data frames in sequence according to the priority of data in each communication period; when the equipment sends the data frame, whether data needsto be sent or not in the next communication period in the data frame is declared, and the data priority is informed; in each communication period, the equipment without the data to be sent declares whether the data to be sent exists in the next communication period or not and the priority of the data after other equipment with the data to be sent finishes sending; and after obtaining the physicalIDs of the senders of all the data frames in the communication period and the corresponding priorities of the to-be-sent data, each equipment judges the data sending time point of the equipment itselfin the next communication period.

Description

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

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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