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Synchronization method and device

A technology of synchronization device and synchronization operation, applied in the field of communication, can solve the problems of inability to achieve synchronization between multiple terminals, clock skew, system clock punctuality, etc., and achieve low implementation cost, avoid synchronization failure, and high synchronization accuracy. Effect

Active Publication Date: 2014-12-24
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. The synchronization method comprises the steps that a first terminal acquires at least two ping-pong time delays between the first terminal and a second terminal; the first terminal judges whether the multiple ping-pong time delays meet the channel stabilizing condition; the first terminal estimates the channel transmission time delay between the first terminal and the second terminal if yes; the first terminal sends a synchronization control signal to the second terminal, wherein the synchronization control signal is used for making the second terminal execute synchronization operation after the synchronization control signal is received by the second terminal; the first terminal executes the synchronization operation after a time delay which is equal to the channel transmission time delay after sending the synchronization control signal. By estimating the channel transmission time delay between the terminals, synchronized control of the terminals is achieved 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 Applications(China)
IPC IPC(8): H04L7/04H04W76/02
Inventor 张梦晗张清
Owner HUAWEI TECH CO LTD
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