664 network message construction algorithm

Abstract

The invention discloses a 664 network message construction algorithm, which comprises the following three steps of: determining the basis of a message algorithm, performing macro definition and valuecalculation thereof, and performing MESSAGE supplementary construction caused by DP deletion, modification and increment. The MESSAGE algorithm based determination comprises two-layer classification of DP in the same APP, internal construction of DS and internal DS classification of Message; the macro definition and value calculation comprises setting of main parameters and macro definitions, determination of a limiting relation satisfied between the macro definitions, and calculation of macro definition values; MESSAGE supplementary construction caused by DP deletion, modification and increment comprises determination of algorithm design limiting conditions, determination of a processing method of a deletion module, determination of a processing method of a modification module, determination of a processing method of an increment module and determination of a relationship among the three modules; the Message internal DS classification includes a simple and optimized filling method. According to the invention, various choices can be provided, the bandwidth utilization rate is higher, fewer switches are needed, the network delay is lower, the jitter is lower, the network determinacyis stronger, and the 664 network physical structure setting requirement applied to airplanes is fully met.

Description

technical field [0001] The invention relates to the technical field of algorithm application, in particular to a 664 network message construction algorithm. Background technique [0002] The physical structure of the ARINC664 (aviation electronics full-duplex communication Ethernet, hereinafter referred to as 664 network) avionics backbone network used in the existing aircraft is manually set, and has not been carefully optimized by the algorithm. Its disadvantages are as follows: 1. Manually setting up the physical structure is only a simple estimation without careful calculation of the algorithm, and this estimation is basically an estimation of the number of interfaces, and lacks an estimation of the internal bandwidth of the interface; in the actual development process of the avionics system In the process, the bandwidth is likely to be insufficient, so the physical structure needs to be reconfigured; the reconfiguration of the structure according to the airworthiness ce...

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