AFH update method and device

Abstract

The invention provides an AFH (Adaptive Frequency-Hopping) update method and device. The method includes the following steps: current transmit-receive property quality of a link is determined, the link is the link between a primary device and a slave device; a real update time is determined according to the current transmit-receive property quality; at least one AFH request is sent to the slave device, wherein the AFH request includes the real update time, so as to enable the slave device to update the AFH information at the real update time; the AFH information is updated at the real update time; the worse the transmit-receive property quality is, the longer an interval between the real update time and a first emitting time of the AFH request is. The slave device has more opportunities toreceive the AFH request, so that the slave device can change to adopt the AFH frequency point group identical to that adopted by the primary device on time, and the transmit-receive failure rate caused by adopting different AFH frequency point groups through the primary and slave device can be effectively reduced.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to an AFH updating method and device. Background technique [0002] Bluetooth (Bluetooth, BT) works in the Industrial Scientific Medical band (ISM band), and the ISM band is an open frequency band that can be used without authorization. However, part of the working frequency of the wireless local area network (WIFI) is located in the above-mentioned frequency band, so for BT, there may be strong interference signals in this frequency band. When the environment is complex and the interference is serious, BT will be greatly affected, and there will be problems such as listening to music, Bluetooth call noise, etc., so BT will use Adaptive Frequency-Hopping (AFH) function evaluation Channel quality to avoid frequency points of interference. [0003] In the existing AFH technology, the master device (Master) sends at least one AFH request (LMP_set_AFH) to the slave devi...

AI Technical Summary

Problems solved by technology

[0004] However, since the time length of the update time is only corresponding to the number of slave devices, the more the number of slave devices, the longer the interval between the update time and the first sending time of the AFH request. When the transceiver performance and environment are poor, There may be a situation where the slave device does not receive the AFH request, resulting in failure of sending and receiving, and disconnecting the link in severe cases

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