Method, system and device for transmitting serial port service data

Abstract

The invention discloses a method, a system and a device for transmitting serial port service data. An MAC (medium access control) address is configured for a serial port service data processing module in a serial SOE device for receiving and outputting the serial port service data based on an Ethernet network; a first processing module of the serial port service data in a first SOE device receives a first serial port service data, and acquires a target MAC address mapped by the MAC address of the first processing module of the serial port service data from a mapping relation of a pre-stored source MAC address and the target MAC address, and encapsulates as a first Ethernet message, and the first Ethernet message is sent to a second SOE device through the Ethernet network; the second SOE device receives the first Ethernet message for de-encapsulation and acquires the first serial port service data, and the first serial port service data are output through the second processing module of the serial port service data corresponding to the target MAC address according to the target MAC address obtained by the de-encapsulation. By adopting the invention, the transmission delay of the serial port service data and the device cost can be reduced.

Description

technical field [0001] The invention relates to serial port communication technology, in particular to a method, system and equipment for transmitting serial port service data. Background technique [0002] At present, as a traditional way of automatic control equipment in industry and power industry, serial port communication still has a wide range of uses. [0003] figure 1 It is a schematic diagram of the existing serial port communication connection structure. see figure 1 , the host device is connected to each remote device through the shared recommended standard (RS, Recommend Standard) 485 bus, the host device sends the serial port service data carrying the remote device identification through the RS485 bus, and each remote device The remote device identification carried in the device determines whether it is the business data sent to itself, and the serial port business data carrying its own identification is sent to the host device through the RS485 bus. [0004...

AI Technical Summary

Problems solved by technology

The serial port server needs to process the TCP / IP protocol stack, so the processor performance is required to be high, which makes the cost of the serial port server relatively high

[0012] (2) The data processing delay is relatively large

Serial servers generally use software to encapsulate and process IP packets. The delay caused by encapsulation and processing is relatively large, generally requiring several ms or even more than ten ms, which cannot meet some delay-sensitive service transmissions.

[0013] (3) For multi-port serial servers, the serial port business data is not easy to isolate, which affects business security

as mentioned above Figure 4 As shown, when a two-port serial server is connected to different remote serial servers through an IP network, since the host devices 1 and 2 may need data isolation, and usually a serial server only has one IP address, it is impossible to connect the host devices 1, 2 2 business is isolated by Virtual Local Area Network (VLAN, Virtual Local Area Network)

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