Data synchronous transmission method for spaced-based routing exchange system, and device and system adopting same

Abstract

The invention discloses a data synchronous transmission method for a spaced-based routing exchange system, and a device and a system adopting the same. The method comprises the following steps: a broadcast unit board sends data to a receiving unit board based on a first clock, and continuously broadcasts the first clock to the receiving unit board; the receiving unit board receives data based on the received first clock; and the receiving unit board processes data ready for being sent to the broadcast unit board based on a second clock, and sends data to the broadcast unit board based on the received first clock. In the invention, the first clock of the broadcast unit board can be utilized to complete the data transmission between the broadcast unit board and the receiving unit board, and only three data cables are needed between the two unit boards for transmitting and receiving data, and transmitting the first clock. By adopting the technical scheme, data synchronous transmission among unit boards in a spaced-based routing exchange system can be realized, the synchronization cost is lowered, and the synchronization circuit is simplified.

Description

technical field [0001] Embodiments of the present invention relate to data processing technology, and in particular to a method, device and system for synchronous transmission of data in a space-based routing and switching system. Background technique [0002] The space-based information network is a satellite network (space-based), which integrates space-ground information, consists of various types of satellite systems in different orbits, and is interconnected and organically constituted in accordance with the principle of maximum and effective comprehensive utilization of space information resources. system. The space-based information network integrates a variety of aerospace information systems, has independent information acquisition, storage, processing and distribution capabilities, and can be interconnected with land, sea, and space-based information systems to achieve multiple and three-dimensional sharing of information and become the next generation of mobile A...

AI Technical Summary

Problems solved by technology

[0007] Due to the special operating environment of the on-board routing and switching system, it is difficult to effectively apply the existing data synchronization transmission method. Specifically: 1) For the first method, the system design is relatively complicated due to the need for auxiliary modules such as GPS, which does not meet the requirements The design concept of space system is simple and efficient; and with this method, time stamps must be transmitted while transmitting data, and the efficiency of data transmission is low, which is unfavorable for satellite systems with expensive resources; finally, for satellites with higher orbits node, GPS technology is often not applicable

2) For the second method, in order to meet the requirements of high-speed data transmission, a clock that is 4 times that of the driving clock for sending data is required, which puts higher requirements on data processing and transmission devices, and is difficult to apply to aerospace systems with harsh environments

3) For the third method, technologies such as analog phase-locked loops need to be used, which will increase the complexity of system design, and is also not conducive to the full digital design of the system. High design principles are violated

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