A Method for Critical Business Burst Processing in Airborne Avionics Network

Abstract

The invention belongs to the technical field of avionics, and discloses a method for processing bursts of critical services in an airborne avionics network. The method for processing bursts of critical services in the airborne avionics network is based on business planning and partition scheduling of a TTE network The mechanism divides the time axis into multiple basic periods, and each basic period is divided into two sections: the TT segment that only transmits TT and the ET segment that transmits RC / BE. The present invention solves the problem that the network carries burst messages without causing packet loss through the replacement of key burst services and the one-way conversion of downgrading priority. The optimized ET scheduling method is based on the level of burst services, which not only ensures The deterministic delay of the key services sent will not bring much delay impact on the original TT and RC services, and also improve the link utilization rate of the TT segment.

Description

technical field [0001] The invention belongs to the technical field of avionics, and in particular relates to a key business burst processing method in an airborne avionics network. Background technique [0002] The airborne network is considered to be the "central nerve" of the aircraft. It interconnects airborne systems such as electromechanical and flight control systems. It requires high bandwidth and strict end-to-end delay. It is a typical strong real-time safety-critical control network. It is necessary to ensure the reliability of information services in a mixed security-critical business environment. The network environment is usually unpredictable. Network business burst refers to the simultaneous arrival of multiple services that cause the buffer queue of a certain node port to overflow in a very short time, or the rate mismatch blocking caused by the input rate of the link being greater than the output rate. . Business bursts will not only affect the real-time ...

AI Technical Summary

Problems solved by technology

[0003] To sum up, the problems existing in the existing technology are: most of the current burst processing methods are to directly discard the burst messages, but the burst messages themselves may be security-critical messages, and directly discarding them will seriously affect the communication requirements of the network , the real-time and deterministic nature of the network cannot be guaranteed, and there is no special processing method for emergency messages such as sporadic messages

The AS6802 specification pointed out that TTE switches have the function of traffic type conversion, but did not discuss its application scenarios and real-time impact

In addition to affecting itself and the certainty of the original real-time news, the burst is also likely to cause network congestion.

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