NanoAFDX network communication system compatible with universal AFDX

Abstract

The invention discloses a nanoAFDX network communication system compatible with universal AFDX. The system comprises end equipment and a switch, and a terminal protocol logic on the end equipment comprises a sending protocol processing module, a virtual channel parallel shaping module and a core scheduling module; the sending protocol module packages the data generated by the application accordingto the agreed application configuration to form an AFDX data frame, and inputs the AFDX data frame into a shaping buffer area corresponding to a virtual channel to wait for shaping scheduling; the virtual channel parallel shaping module is used for storing the AFDX data frames on each shaping buffer area into a scheduling buffer area according to a fixed shaping scheduling period; and the core scheduling module realizes that only one frame is sent in each scheduling period in a serial scheduling mode from data frames from different virtual channels in a scheduling buffer area according to a preset frame scheduling period. According to the invention, the end equipment sends data regularly according to a fixed period, and the system architecture design is simplified.

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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