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Method, device and system for time synchronization

A time synchronization and time technology, applied in the field of positioning systems, can solve problems such as expensive atomic clocks, cumbersome operations, and GNSS timing receivers that are easily affected by the external environment

Inactive Publication Date: 2014-03-26
上海德思普微电子技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, atomic clocks are very expensive and require regular time calibration, which is very cumbersome to operate
[0007] 3) Use GNSS (Global Navigation Satellite System, Global Navigation Satellite System) timing receiver for time synchronization, but in this method, the GNSS timing receiver is easily affected by the external environment, and its accuracy is only about 100 nanoseconds

Method used

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  • Method, device and system for time synchronization
  • Method, device and system for time synchronization
  • Method, device and system for time synchronization

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] figure 1 It is a flow chart of a time synchronization method provided in Embodiment 1 of the present application.

[0055] like figure 1 As shown, the method includes:

[0056] S101. The augmented signal transmitter receives the reference signal transmitted by the reference signal transmitter.

[0057] A time synchronization method provided by an embodiment of the present application is applied to a reference signal transmitter and at least one augmented signal transmitter. In the method, the augmented signal transmitter first receives the reference signal transmitted by the reference signal transmitter.

[0058] S102. The augmented signal transmitter acquires the oscillation frequency, location information and reference signal transmission time of the reference signal transmitter carried in the reference signal.

[0059] In this embodiment of the application, the augmented signal transmitter tracks the oscillation frequency of the reference signal transmitter carrie...

Embodiment 2

[0071] figure 2 It is a schematic structural diagram of a time synchronization device provided in Embodiment 2 of the present application.

[0072] like figure 2 As shown, the device includes: a reference signal receiving module 1 , an acquisition module 2 , an oscillation frequency correction module 3 , a data transmission time setting module 4 , a transmission delay calculation module 5 and a delay correction module 6 .

[0073] Wherein, the reference signal receiving module 1 is used for receiving the reference signal transmitted by the reference signal transmitter.

[0074] The acquiring module 2 is connected with the reference signal receiving module 1, and is used for acquiring the oscillation frequency, location information and reference signal transmission time of the reference signal transmitter carried by the reference signal.

[0075] The oscillation frequency correction module 3 is connected with the acquisition module 2, and is used for correcting the oscillat...

Embodiment 3

[0086] image 3 It is a schematic structural diagram of a time synchronization system provided in Embodiment 3 of the present application.

[0087] like image 3 As shown, the system includes: a reference signal transmitter and at least one augmented signal transmitter, and the augmented signal transmitter is provided with a time synchronization device as shown in the second embodiment above.

[0088] In the embodiment of the present application, preferably but not limited to, one such as image 3 For the time synchronization system shown, the inventor can also set it as above according to actual needs image 3 The shown at least one time synchronization system communicates by bridging each time synchronization system to form a larger time synchronization system.

[0089] The embodiment of the present application provides a time synchronization system, which includes a reference signal transmitter and at least one augmented signal transmitter. By using the time of a referen...

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Abstract

The invention provides a method, device and system for time synchronization. A reference signal transmitter and at least one augmented signal transmitter are arranged in a locating system, then time synchronization between the augmented signal transmitter and a reference signal transmitter is completed, so that in the time synchronization process of the locating system, on the premise that the time synchronization precision of each transmitter is ensured, cost is reduced, and the requirement for large range erection is met.

Description

technical field [0001] The present application relates to the technical field of positioning systems, in particular to a time synchronization method, device and system. Background technique [0002] The ground-based navigation and positioning system moves the signal transmitted by the satellite to the surface of the earth, and uses a static transmitter to broadcast the positioning signal to the outside, so as to realize the positioning of the user. [0003] However, in the process of positioning a land-based navigation and positioning system, it is usually necessary to set up 4 or more transmitters as reference signals for positioning calculations. In order to obtain accurate positioning results, these 4 or more transmitters are required The time between transmitters is strictly synchronized. Therefore, in the prior art, the problem of time synchronization between transmitters in the ground-based navigation and positioning system is a key problem faced by the ground-based na...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04J3/06
Inventor 方桂成
Owner 上海德思普微电子技术有限公司
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