Sending method, receiving method and equipment of digital communication

Abstract

The embodiment of the invention provides a sending method of digital communication, comprising the following steps: a system sends configuration tables and dictionaries to nodes in the network; sending nodes send data packets to receiving nodes, wherein, the data packet at least comprises the fields of four parts including address, control, length and data; the configuration tables are used for analyzing the fields of the four parts. The embodiment of the invention also provides a receiving method of digital communication and digital communication equipment. By defining uniform data format, the technical scheme provided by the embodiment of the invention provides network architecture which can be suitable for realizing industrial network automation and has the characteristics of openness,interoperability, standard, real time and safety. Besides, the realization of protocols is simple and efficient.

Description

Technical field [0001] The present invention relates to the field of digital communication, and in particular to a method and equipment for sending and receiving digital communication. Background technique [0002] There are many electric power communication protocols, but there is no uniform protocol, even the recent IEC61850 and IEC 61970 / 61968. These protocols make full use of the hardware implementation of the power communication network to ensure the real-time communication. However, the layering is unclear, the functions are interleaved, and the ISO model or the TCP / IP model is in many ways. The standard and openness are poor. Most of the uplink is easy, Downstream difficulties, such as CDT and Polling protocols, are far from interconnection requirements. [0003] The popular TCP / IP protocol standard on the Internet is open and interconnected. However, the well-known problem is that the real-time and security are poor. The real-time performance of the UDP protocol used for r...

AI Technical Summary

Problems solved by technology

These protocols make full use of the hardware implementation of the power communication network to ensure the real-time communication. However, the layers are unclear, the functions are crossed, and there are many conflicts with the ISO model or the TCP / IP model. The standards and openness are poor, and most of them are easy to connect. Downlink is difficult, such as CDT and Polling protocols, which are far from interconnection requirements

[0003] The popular TCP / IP protocol on the Internet is standard, open and interconnected. However, the well-known problem is that the real-time performance and security are poor. The UDP protocol used for real-time communication has no guarantee for real-time performance and reliability. The occasional disconnection of IP telephones is due to poor real-time performance; although the banking system adopts encryption technology, virus attacks and information leakage on the network are common problems on the Internet

There are many application layer protocols on the Internet, such as SMTP, FTP, HTTP, etc., but there is no unified encoding method for application data

[0004] To sum up, neither the power protocol nor TCP / IP can meet the communication requirements of the smart grid: standard, open, interconnected, reliable, real-time, secure and unified

[0005] The situation of other industrial networks is similar to the power protocol, and it cannot meet the requirements of the smart grid

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