Dual-network switching device based on FPGA (field programmable gate array) and dual-network switching method thereof

Abstract

The invention discloses a dual-network switching device based on a FPGA (field programmable gate array). The dual-network switching device comprises a FPGA chip, a first PHY (physical layer) chip, a second PHY chip, a first communication interface module and a second communication interface module, wherein the FPGA chip comprises a MicroBlaze soft core processor, an MAC (measurement and control) controller and an alternative controller; the MicroBlaze soft core processor is electrically connected with the MAC controller in a bidirectional manner; the MAC controller is electrically connected with the alternative controller in the bidirectional manner; the alternative controller is electrically connected with the first and the second PHY chips in the bidirectional manner respectively; the alternative controller is used for selectively connecting the MAC controller to one of the first and the second PHY chips; the first and the second PHY chips are respectively connected with the first and the second communication interface modules electrically in the bidirectional manner in a one-to-one correspondence manner. The invention further discloses a method for performing dual-network switching on the dual-network switching device based on FPGA. Dual-network switching is realized through hardware, so that communication instantaneity is improved.

Description

technical field [0001] The invention relates to an FPGA-based dual-network switching device and a dual-network switching method. Background technique [0002] The ship engine room monitoring and alarm system has high requirements on the reliability and real-time performance of data transmission, so how to solve the data reliability and real-time performance is a very important problem in the communication process. Currently, dual-network redundancy and dual-network switching are mainly used to solve the problem of data transmission reliability. [0003] In the dual-network redundant communication mode, the application layer generally has two processing methods for the received data. The first one is to compare the data received by the two networks. If the data is consistent, it means that the data transmission is correct. This processing method needs to be processed at the same time. Receive data from two networks, and when one network fails, you need to wait to determine w...

AI Technical Summary

Problems solved by technology

This processing method needs to wait when judging the network failure, so this processing method cannot guarantee the real-time performance of data transmission

[0004] In the dual-network switching communication mode, the switching method commonly used now is to judge whether the network is faulty at the application layer. At present, the real-time switching speed is about 20 milliseconds, which is not enough for systems that require high real-time performance.

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