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WiFi device and its time synchronization method

A technology for time synchronization and equipment, which can be used in synchronization devices, wireless communication, network topology, etc., and can solve problems such as waste of resources.

Active Publication Date: 2019-11-26
SPREADTRUM COMM (SHANGHAI) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, when the WIFI device serves as a site with multiple roles at the same time and establishes data transmission links between different access points at the same time, it needs to use multiple counters to complete the time synchronization on the corresponding links at the same time, which is a waste of resources. The problem

Method used

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  • WiFi device and its time synchronization method
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  • WiFi device and its time synchronization method

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Embodiment Construction

[0031] In order to solve the above-mentioned problems existing in the prior art, the technical solution adopted in the embodiment of the present invention can obtain any time difference between the current receiving time and the next receiving time by adding the recorded time deviation value to the time of the local counter at the current time. When the time information of the corresponding access point in the time point is used, resources can be saved.

[0032] In order to make the above objects, features and advantages of the present invention more comprehensible, specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0033] figure 1 A flow chart of a time synchronization method for WIFI devices in an embodiment of the present invention is shown. like figure 1 The time synchronization method of the shown WIFI device may include the following steps:

[0034] Step S101: When the WIFI device is connect...

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Abstract

The invention relates to a WIFI device and time synchronization method thereof. The method comprises: when a WIFI device serving as a station of different roles is connected in parallel with a plurality of access points, time information of the access points at a current reception time is obtained; time of a local counter at the current reception time is subtracted from the time of the access points at the current reception time to obtain corresponding time deviation values; and time synchronization is carried out on the multiple access points by using the corresponding time deviation values between the current reception time and a next reception time on the premise that the time of the local counter is not changed. Therefore, when the WIFI device serving as a station of different roles establishes a data transmission line with the plurality of access points, resources occupied by time synchronization can be saved.

Description

technical field [0001] The invention relates to the technical field of wireless transmission detection, in particular to a WIFI device and a time synchronization method thereof. Background technique [0002] The 802.11 protocol is a standard developed by the Institute of Electrical and Electronics Engineers (IEEE) for wireless local area networks. According to the 802.11 standard, when a WIFI device establishes a data transmission link between a station and an access point, it can synchronize the corresponding time stamp information carried in the beacon (Beacon) frame or probe response (probeResponse) frame to the local Time synchronization function (TimingSynchronization Function, TSF) counter, to keep the local TSF time value consistent with the time of the access point, so as to achieve the purpose of time synchronization. [0003] However, when the WIFI device serves as a site with multiple roles at the same time and establishes data transmission links between differen...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W56/00H04W84/12
CPCH04W56/001H04W84/12
Inventor 刘丽华
Owner SPREADTRUM COMM (SHANGHAI) CO LTD