A nanoafdx network communication system compatible with universal afdx

Abstract

The invention discloses a nanoAFDX network communication system compatible with general AFDX, which includes a terminal device and a switch. The terminal protocol logic on the terminal device includes a sending protocol processing module, a virtual channel parallel shaping module, and a core scheduling module; The data is packaged according to the agreed application configuration to form an AFDX data frame and input to the shaping buffer corresponding to the virtual channel to wait for shaping scheduling; the parallel shaping module of the virtual channel is used to store the AFDX data frame on each shaping buffer into the scheduling according to the fixed shaping scheduling cycle Buffer; the core scheduling module sends data frames from different virtual channels from the scheduling buffer in a serial scheduling manner according to the preset frame scheduling cycle, so that only one frame is sent in each scheduling cycle. The invention enables the terminal equipment to send data regularly according to a fixed period, and simplifies the design of the system architecture.

Description

technical field [0001] The invention belongs to the technical field of airborne bus communication in avionics systems, relates to a nanoAFDX network communication system compatible with general AFDX, provides a layered architecture combining standard AFDX and nanoAFDX, and satisfies real-time performance and high efficiency in the fields of electromechanical and flight control , safety and reliability. Background technique [0002] Due to the different data communication characteristics within each functional domain in the aircraft electronic system (aviation electronics, electromechanical, and flight control), there are many types of tasks in the avionics field, the granularity of the task execution cycle is large, the amount of data generated by the task is large, and the traffic load is large. The tasks in the field of electromechanical and flight control are relatively single, and the real-time efficiency, safety and reliability of task execution are pursued. Each funct...

AI Technical Summary

Problems solved by technology

Each functional domain uses different communication architectures and communication protocols for transmission, such as RS422, 232, A429, 825, 717, ARINC825, 1553B, TTP, 1394, AFDX, etc. The variety of communication types leads to various types of connectors, complex connections, The weight and cost of cables are high, the interconnection design complexity is high, and the electromagnetic environment is complex

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