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A synchronization method and device

A synchronization device and a technology of synchronous operation, applied in the field of communication, can solve problems such as system clock punctuality, clock offset, and inability to realize synchronization among multiple terminals, and achieve low implementation cost, avoid synchronization failure, and high synchronization accuracy Effect

Active Publication Date: 2018-03-16
HUAWEI TECH CO LTD
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Problems solved by technology

[0005] However, this method relies on the complete synchronization of the system clock. If the system clock is not synchronized, the synchronization between multiple terminals cannot be realized. However, the system clock itself has a problem of punctuality. After the system runs for a long time, the clock will gradually become biased. shift, this method requires constant clock calibration

Method used

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Embodiment Construction

[0053] In order to enable those skilled in the art to better understand the technical solutions in the embodiments of the present invention, and to make the above-mentioned purposes, features and advantages of the embodiments of the present invention more obvious and understandable, the following describes the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings For further detailed explanation.

[0054] see figure 1 , is a flowchart of a synchronization method according to an embodiment of the present invention.

[0055] The method can include:

[0056] Step 101, the first terminal obtains at least two ping-pong time delays between the first terminal and the second terminal.

[0057] In the embodiment of the present invention, the terminal may be a mobile communication tool such as a mobile phone. Wherein, "first" and "second" are only used to distinguish different terminals, and are not specific or limited.

[0058...

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Abstract

The embodiment of the invention discloses a synchronization method and device. A synchronization method includes: the first terminal obtains at least two ping-pong delays between the first terminal and the second terminal; the first terminal judges whether the plurality of ping-pong delays meet channel stability conditions; if so, The first terminal estimates a channel transmission delay between the first terminal and the second terminal; the first terminal sends a synchronization control signal to the second terminal, and the synchronization control signal is used for the second terminal The two terminals perform a synchronization operation after receiving the synchronization control signal; and the first terminal performs a synchronization operation with a delay equal to the channel transmission time delay after sending the synchronization control signal. The embodiment of the present invention realizes the synchronization control between terminals by estimating the channel transmission time delay between terminals, and according to the channel transmission time delay.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a synchronization method and device. Background technique [0002] As mobile terminals become more and more popular, multiple mobile terminals can be used to work together in many scenarios (such as parties, business meetings, etc.), so that they can achieve functions and effects that are difficult to achieve with a single mobile terminal. [0003] The key to the coordination of multiple mobile terminals lies in the synchronization technology. In some application scenarios, such as multi-person table games, whiteboard conferences, etc., the multi-terminal collaboration in these scenarios mainly satisfies the coordination of user operations, and does not require high synchronization. In other application scenarios, such as terminal Audio arrays, video splicing, etc. have high requirements for synchronization, otherwise it will cause problems such as audio pan shift...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L7/04H04W76/10
Inventor 张梦晗张清
Owner HUAWEI TECH CO LTD
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