A Fractional Scheduling Method Applied to Shared Ethernet

Abstract

The invention discloses a fractional scheduling method applied to a shared Ethernet, including: 1. obtaining allocated time slots; 2. further dividing the time slots into TT time slices and ET time slices; The priority of the data is sent to the on-time scheduling port, timing scheduling port or random access port; four: on-time scheduling port, timing scheduling port, and random access port frame the received data and store them in their corresponding on-time scheduling data frames Queue, scheduled data frame queue, random access data frame queue; 5. In the TT time slice, send data frames in the scheduled data frame queue; 6. In the ET time slice, send the scheduled data frame queue, random access A data frame in the data frame queue. The invention is applicable to the field of avionics communication, especially in the field of flight control, engine control and electromechanical control, which requires extremely high certainty and safety of data transmission.

Description

technical field [0001] The invention belongs to the field of airborne bus communication technology in avionics systems, and in particular relates to the selection of bus network architecture in the field of communication, which requires extremely high certainty and safety of data transmission in the field of flight control, engine control and electromechanical control design method. Background technique [0002] In the past few decades, Ethernet, as an open and standardized network, has achieved the most extensive and successful application in the world, and it has experienced the evolution of network configuration from shared to switched. The current mainstream switched Ethernet has developed from 100Mbps to 100Gbps. Due to its open nature, it is vulnerable to various attacks, and the security level cannot meet the high-security application fields of aviation and airborne; at the same time, the best-effort transmission method adopted by Ethernet does not take too much into...

AI Technical Summary

Problems solved by technology

As a relatively closed bus technology, TTP's research scope and technical advancement are not as extensive and continuous as Ethernet technology, and its physical layer technology has almost no new update iterations, resulting in poor scalability of transmission bandwidth; The backbone network based on 802.3 standard, such as industrial switched Ethernet AFDX, time-triggered Ethernet TTE and optical fiber Ethernet, is widely used in avionics systems. Design a high-deterministic, low-cost, and bandwidth-compatible Ethernet-compatible It is very potential to replace TTP with network and apply to aviation distributed control system

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