Airborne redundant network data transmission method

Abstract

The invention discloses an airborne redundant network data transmission method, which solves the contradiction between strong real-time burst data transmission and ordinary service data transmission in an airborne unified network. The present invention is achieved through the following technical solutions: configuring a redundant network transmission mode according to an avionics system, configuring the redundant network as a split transmission, data backup transmission or network backup transmission mode, in the split transmission mode, the processor and Its application unit distributes data packets of different characteristic types to different redundant transmission networks through the processor interface for transmission; when configured as data backup transmission mode, the same data packets are transmitted through the redundant transmission network, and the transmission management of the sending node The unit copies the data into multiple copies and transmits it through multiple redundant networks; in the network backup mode, only part of the redundant transmission network is in the transmission state, and when the working network fails, the backup network is enabled through network backup.

Description

technical field [0001] The invention relates to an airborne redundant network data transmission method, in particular to a method that supports heterogeneous transmission modes and can take into account the transmission of strong real-time burst data and common service data. Background technique [0002] The avionics system has experienced the development process of separation, combination and integration, and is developing in the direction of high integration. The bus network is a key factor determining the performance of the airborne electronic system. The carrier electronic system puts forward higher requirements on the transmission rate, real-time performance and reliability of the bus network. The use of a unified airborne high-speed network can not only meet the requirements of high-speed interconnection and transmission, but also simplify system design, facilitate system integration, maintenance and management, and further improve the degree of integration of the avio...

AI Technical Summary

Problems solved by technology

However, the time-triggered transmission method also has certain limitations: each node only transmits data in the assigned time slot, and cannot transmit data through the network at other times. If the data packet to be sent misses the current transmission time slot, it must wait for the next time slot. The transmission time slot of a bus cycle (the bus cycle can be configured according to the application scenario, usually in milliseconds), the maximum transmission delay of this transmission method is predictable, which can meet the requirements for the maximum transmission delay, or periodic business data transmission scenarios, but it cannot meet the transmission scenarios of some airborne sensor control information with strict real-time requirements. The data volume of this type of control information is usually low, but the requirements for data transmission delay are very high.

Considering the problem of poor certainty in event-triggered transmission, the industry has proposed a time-triggered transmission method. Although it can solve the deterministic problem of airborne network data transmission, time-triggered transmission only allows each node to transmit data within the allocated time slot, and other Data cannot be transmitted through the network within a certain period of time. If the data to be sent by the node just misses the transmission time slot, it must wait for the transmission time slot of the next bus cycle, that is, the maximum waiting delay for data transmission is one bus cycle, although the maximum transmission time The delay can be estimated (the maximum transmission delay is determined), but it cannot meet some strong real-time burst application scenarios in airborne applications. Usually, such strong real-time burst data transmission needs to be realized by an independent point-to-point design. To a certain extent Increases the complexity of the system, making it difficult to design and implement an airborne unified network

Therefore, in the airborne unified high-speed network, the simple time-triggered or event-triggered transmission method cannot meet the transmission requirements of strong real-time burst data and ordinary business data at the same time.

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