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

A switching system and data synchronization technology, applied in the field of data processing, can solve problems such as high reliability, difficulty in applying space systems, GPS technology cannot be applied, etc., and achieve the effect of reducing synchronization costs and simplifying synchronization lines

Inactive Publication Date: 2011-06-29
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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

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Embodiment 1

[0048] figure 2 The flow chart of the data synchronous transmission method of the space-based routing and switching system provided by Embodiment 1 of the present invention. The space-based routing and switching system can also be called the on-board routing and switching system. Take the implementation of synchronous transmission between them as an example to illustrate. The typical structure of the on-board routing and switching system is as follows: image 3 As shown, it includes a main control routing switching board 10 , a user interface board 20 , an inter-satellite link interface board 30 and a feeder link interface board 40 . The main control routing switching board 10 realizes data interactive transmission with the user interface board 20 , the inter-satellite link interface board 30 and the feeder link interface board 40 respectively, and completes the routing exchange of various data. The user interface board 20, the inter-satellite link interface board 30 and th...

Embodiment 2

[0059] Figure 4 A schematic structural diagram of a space-based routing and switching system data synchronization transmission device provided in Embodiment 2 of the present invention, the device includes: a clock receiving interface 410 , a clock management module 420 , a data receiving interface 430 , a data processing module 440 and a data sending interface 450 . Wherein, the clock receiving interface 410 is used to receive the first clock continuously broadcast by the broadcasting unit board, and the first clock may be the local clock of the broadcasting unit board; the clock management module 420 is used to provide the first clock received by the clock receiving interface 410 To the data sending interface 450 and the data receiving interface 430, and provide the second clock to the data processing module 440, the second clock can be the local clock of the receiving unit board; the data receiving interface 430 is used to receive the broadcasting unit board based on the fir...

Embodiment 3

[0065] Figure 5A schematic structural diagram of a space-based routing and switching system provided in Embodiment 3 of the present invention, the routing and switching system includes at least one broadcasting unit board 100 and at least one receiving unit board 200, and each broadcasting unit board 100 and receiving unit board 200 pass through The three data lines are connected. The broadcast unit board 100 includes: a first clock management module 110 , a first data sending interface 120 , a first clock broadcasting interface 130 and a first data receiving interface 140 . Wherein, the first clock management module 110 is configured to provide the first clock to the first data sending interface 120, the first clock broadcasting interface 130 and the first data receiving interface 140, and the first clock may be the local clock of the broadcast unit board 100; The first data transmission interface 120 is used to send data to the receiving unit board 200 based on the first c...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L7/00H04L12/56H04B7/185
Inventor 张涛张军苏阳谢晋东
Owner BEIHANG UNIV
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