Time-triggered unified network transmission end system scheduling method and device

Abstract

The invention relates to a time-triggered unified network transmission end system scheduling method and device, which comprises the following steps of: configuring a time scheduling table which comprises static configuration and online loading configuration; carrying out clock synchronization, and completing dynamic correction of a local clock according to the time solidification point compressedby the switch; performing data scheduling: dividing data types into a time synchronization protocol control frame, a TT message data frame, an RC message data frame and a BE message data frame according to priority levels from high to low; performing data transmission reliability check, including time window conformity check of the TT message by the end system. The method has the beneficial effects that the communication service provides a time synchronization service, high reliability, time determination and strong real-time unified network transmission of different message data are ensured,the conversion expenditure of different network protocols is reduced, the reliability of the system is improved, and the method adapts to the requirement of spaceflight redundant transmission.

Description

technical field [0001] The invention belongs to the technical field of time-deterministic network aerospace communication, and in particular relates to a scheduling method and device for a time-triggered unified network transmission end system. Background technique [0002] At present, spacecraft generally use traditional 1553B, CAN and other low-speed buses to transmit satellite platform data. This type of communication transmission has high reliability and can meet strong real-time requirements, but this type of data requirements has increased from 100kbps to Mbps, and even Dozens of Mbps, low-speed buses can no longer meet the requirements of future spacecraft applications. Using high-speed switched Ethernet technology can increase the communication delay to the us level and meet the requirements of data traffic. However, due to the mechanism of Ethernet event triggering, the formation of switches The state of come-first-execute cannot guarantee that the platform control ...

AI Technical Summary

Problems solved by technology

This is inseparable from the unified management of time scheduling for multi-task management, and must have clock synchronization technology guarantees. It mainly relies on static scheduling to generate offline time scheduling tables. However, the flexibility in engineering applications is poor, and many The time schedule is adjusted every time, and it is repeatedly downloaded to the PROM of the system hardware, which affects the efficiency of system development and verification

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