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Clock synchronization method in FC-AE-1553 network

A clock synchronization and time synchronization technology, applied in the field of FC-AE-1553 network communication, can solve the problems of high cost and low time synchronization accuracy, achieve high time synchronization accuracy and reduce hardware investment.

Active Publication Date: 2017-07-28
TECH & ENG CENT FOR SPACE UTILIZATION CHINESE ACAD OF SCI
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Problems solved by technology

[0013] In view of the above analysis, the present invention aims to provide a clock synchronization method in the FC-AE-1553 network, in order to solve the problem that the existing time synchronization accuracy is low and hardware equipment is required to cause high cost

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  • Clock synchronization method in FC-AE-1553 network
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  • Clock synchronization method in FC-AE-1553 network

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Embodiment Construction

[0083] Preferred embodiments of the present invention will be specifically described below in conjunction with the accompanying drawings, wherein the accompanying drawings constitute a part of the application and are used together with the embodiments of the present invention to explain the principle of the present invention.

[0084] The invention discloses a clock synchronization method in FC-AE-1553 network. In the FC-AE-1553 network, there are four network models: master clock (time synchronization server, Master Clock), boundary clock (BC), transparent clock (TC) and ordinary clock (OC). Among them, NC / NT (network controller / network terminal) corresponds to the main clock or ordinary clock, and the network switch corresponds to the transparent clock or boundary clock.

[0085] Described master clock (time synchronous server, Master Clock) refers to the terminal node that receives GPS signal, corrects self frequency and time by receiving 1PPS and ToD signal of GPS, reaches...

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Abstract

The invention relates to a clock synchronization method in an FC-AE-1553 network. The method comprises the following steps: a main clock of the FC-AE-1553 network receives time information, and accomplishes the clock synchronization of the main clock according to the time information, wherein the main clock subjected to the clock synchronization is marked as BMC; and other nodes in the FC-AE-1553 network performs the clock synchronization based on a time synchronization frame according to the BMC. The clock synchronization comprises frequency synchronization and time synchronization, estimation and correction of own frequency offset are realized by the frequency synchronization, and the compensation of delay time is realized by the time synchronization. The clock synchronization mode in the FC-AE-1553 network further comprises a gradual synchronization mode, a boundary clock / transparent clock switch synchronization mode and a transparent clock switch mode. The design of the clock synchronization mode in the FC-AE-1553 network solves the problems that the time synchronization precision is low and that a special hardware device needs to be paved, resulting in a high investment cost in the prior art, and the time synchronization demands of the majority of the new generation of loads can be satisfied.

Description

technical field [0001] The invention relates to the technical field of FC-AE-1553 network communication, in particular to a clock synchronization method in the FC-AE-1553 network. Background technique [0002] The synchronization requirements of modern communication networks mainly include two types of requirements: frequency synchronization and time synchronization. Frequency synchronization, also known as clock synchronization, refers to the maintenance of a strict specific relationship between the frequency or phase of the signals, and the corresponding effective instants appear at the same average rate to maintain all devices in the communication network at the same rate. speed operation. After the clocks are synchronized (frequency synchronized), the phase / time of the two clocks is still different. Time synchronization is also called phase synchronization. Two network nodes that have been time synchronized have the same frequency and the same time / phase. [0003] Due...

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Application Information

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IPC IPC(8): H04J3/06
CPCH04J3/0638
Inventor 乔旷怡何建华畅响曹素芝展月英张莹魏玮李龙许辉
Owner TECH & ENG CENT FOR SPACE UTILIZATION CHINESE ACAD OF SCI
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