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A method for wireless network beacon frame synchronization

A wireless network and beacon frame technology, applied in wireless communication, synchronization devices, advanced technology, etc., can solve the problems of not receiving beacons, wasting electricity, etc., and achieve the effect of short reception lead time and simple and reliable measurement

Active Publication Date: 2022-01-11
SHENZHEN GALAXYWIND NETWORK SYST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Here, the slave wakes up regularly and starts the receiver to receive the beacon sent by the master. The timing is very important. If it is too early, it will waste electricity, and if it is too late, it will not receive the beacon.

Method used

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  • A method for wireless network beacon frame synchronization
  • A method for wireless network beacon frame synchronization
  • A method for wireless network beacon frame synchronization

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Embodiment Construction

[0034] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0035] In the present invention, the frequency errors of the CPU oscillators of the host computer and the slave computer are within the allowable range. For example, the host uses a 50ppm crystal oscillator, and the slave uses an RC oscillation period with a 1% error. The oscillator error of the host and slave can be considered to be about 1%, and the design can be designed according to a 1% error. The host uses its own clock to periodically send beacon messages at a period T.

[0036] Such as figure 2 As shown, one embodiment of the present invention comprises the following steps:

[0037] 1) When a beacon message is received, the slave starts the receiver at time t0 to receive the beacon message. Such as image 3 As shown, at time t1 the slave receives a beacon message from the master, and the theoretical transmission time of the beacon...

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PUM

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Abstract

The invention relates to a method for synchronizing wireless network beacon frames. The method is used for beacon message transmission between the host and several slaves, comprising the following steps: Step 1, calculating the time advance of the slave receiving the beacon message in a certain beacon message transmission; step 2. According to the comparison result of the time advance amount and the time advance amount standard value, determine the delay of the slave receiving the next beacon message compared to the beacon message in step 1; step 3, according to the delay described in step 2 , calculate the receiving time of the next beacon message; step 4, return to step 1 for iteration. The invention does not need the master and the slave to correct the clock first, is simple to implement, and is applicable to CPUs with few resources.

Description

technical field [0001] The invention relates to the technical field of wireless communication, in particular to a method for synchronization of wireless network beacon frames. Background technique [0002] In a star wireless network, the central point is the master and the rest are slaves. For example, the relationship between zigbee coordinator and terminal nodes, the relationship between WIFI routers and WIFI devices (such as mobile phones, notebooks), and the relationship between NB-IOT base stations and devices. [0003] In some cases, the slave is a battery-powered device, and it is not allowed for the wireless receiver to be turned on all the time, so beacon technology is used. The master sends beacons at regular intervals, and the slave wakes up to receive beacons at regular intervals, and determines the follow-up according to the beacon Whether the receiver is working. For example, the beacon mode of zigbee, the power saving mode of WIFI, and the DRX mode of NB-IOT...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W56/00H04W52/02
CPCH04W56/001H04W52/02Y02D30/70
Inventor 谭洪国
Owner SHENZHEN GALAXYWIND NETWORK SYST
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