A device and method for generating concurrent services of data frame based on VL

Abstract

The invention discloses data frame concurrent service generating equipment based on a VL. The data frame concurrent service generating equipment comprises a frame payload data register, an FPGA module and an MAC layer interface circuit. The FPGA module comprises control information registers, a frame number hardware concurrent processing circuit, an SN generating circuit, a frame interval concurrent processing module, a frame interval control module and a frame convergence module. The FPGA module reads frame control information and frame payload data at first, then frame numbers generated by the SN generating circuit are added to data frame ends to form complete data frames, the complete data frames are sent to the frame convergence module through the frame interval control module for data frame rearrangement, and ultimately the data frames are sent to the MAC layer interface circuit for data frame physical sending. Concurrent operation control over hardware can be achieved through VL data frames within the range of 2048, and each VL data frame is provided with one exclusive control information register.

Description

technical field [0001] The present invention relates to an AFDX (Avionics Full Duplex Switched Ethernet, avionics full-duplex switched Ethernet) aviation data based on FPGA (Filed-Programmable Gate Array, Field Programmable Gate Array) and VL (Virtual link). A method for generating concurrent data frame services, in particular a device and method for generating concurrent data frame services based on VL. Background technique [0002] With the rapid development of avionics equipment and avionics network, due to the characteristics of high reliability, fixed time delay and high communication rate of AFDX data bus, AFDX bus has begun to be used as the aircraft internal communication data bus in the new generation of aviation data bus . But the corresponding domestic AFDX bus test equipment has not been developed yet, and the technology is lagging behind. AFDX bus products are mostly developed in communication, and are suitable for communication within the range of specific VL...

AI Technical Summary

Problems solved by technology

In addition, as a test board, the time resolution is required to be relatively high, and it is generally required to reach the level of us. At present, there is no such test instrument in China, and most of the existing foreign instruments that realize multi-channel VL data frame testing are implemented by software. , only supports concurrent processing of 128 channels of VL data frames, if more VL data frames are to be processed concurrently, it will lead to greater time inaccuracy

This software processing method inevitably has problems such as poor real-time performance and poor data packet jitter delay accuracy, which cannot meet the requirements of high delay resolution.

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