Physical topological structure generation algorithm of 664 avionics network

Abstract

The invention discloses a physical topological structure generation algorithm of a 664 avionics network. The algorithm comprises four steps of basic determination of the algorithm, input and output determination of the algorithm and an algorithm process. The basic determination of the algorithm comprises the following steps: determining annotation attributes in algorithm input, determining a physical topological structure of a 664 network, and determining a virtual link path; wherein the input determination of the algorithm comprises switch attribute determination, terminal attribute determination, APP attribute determination and known connection relationship determination; the algorithm process comprises target model determination of the algorithm, basic thought determination of the algorithm and a specific calculation process. 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 determinacy is stronger, and the 664 network physical structure setting requirement applied to airplanes is fully met. The defects of low calculation precision, low bandwidth utilization rate and high maintenance cost due to manual setting of the physical structure of the avionics backbone network in the prior art are overcome.

Description

technical field [0001] The invention relates to the technical field of algorithm application, in particular to an algorithm for generating a physical topology structure of a 664 avionics network. 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 stru...

AI Technical Summary

Problems solved by technology

[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 certification process will lead to high costs, so in order to avoid resetting the structure, the vacant bandwidth space has to be allocated. very big

2. There is no optimization calculation of the algorithm, and the bandwidth utilization rate of the manual setting structure is not high. For the same transmission requirements, the bandwidth caused by the manual setting of the physical structure may be several times higher than the bandwidth caused by the algorithm optimization setting

3. The bandwidth utilization rate is not high, and more switches need to be added, which increases the physical cost and the complex system of security.

4. The bandwidth utilization rate is not high. During internal transmission, information needs more buffering and waiting inside the switch, and the delay is higher, which easily exceeds the performance requirements of information transmission.

[0003] The reasons for the shortcomings of manual settings are as follows: 1.664 network is the backbone network of a new type of integrated modular avionics system. The general 664 bandwidth has 100Mbit / S. It is a very new network protocol. It has a history of more than 10 years since the protocol was issued. , for the previous avionics system, the communication demand is not large, and the bandwidth resources are basically sufficient; but now there are some projects, even if it is a 664 network, without structural optimization, it still cannot meet the performance requirements of the system for communication

2. Traditional avionics system networks are single-point-to-single-point and single-point-to-multipoint simple networks. They have never used 664 networks, which require multiple switches to support deterministic Ethernet, so due to the inertia of technology use , did not realize the importance of resource calculation and optimization for network performance

3. In the process of system development, there is a process of dismantling requirements from top to bottom. The physical structure of the network is a structural existence in the avionics system. In the dismantling of requirements, it belongs to the upper-level requirements; and the configuration of the network (the configuration affects the bandwidth Calculation) as the lower-layer requirements, the lower-layer requirements need to be done according to the upper-layer requirements; for the 664 network, the existing physical structure seriously affects the network configuration, which in turn affects the performance of the network; It is also difficult to do a good job; and the existing avionics system development has project process control of iterative development. If problems arise, the upper system scheme can be modified, so this problem is not paid much attention to; but now some projects, especially civil aircraft projects, are airworthy. The seriousness of the certification, the iterative modification of the physical structure of the avionics system will cause a lot of follow-up work, resulting in too high cost

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