Communication method, apparatus and system, and storage medium

Patent metadata

Field	Value
Publication number	US-12562819-B2
Application number	US-202218146268-A
Country	US
Kind code	B2
Filing date	Dec 23, 2022
Priority date	Sep 23, 2022
Publication date	Feb 24, 2026
Grant date	Feb 24, 2026

Abstract

A communication method, applied to a master device, includes: determining, according to the number of controlled devices and a preset time slot length, detection cycles and detection timing of various controlled devices in a detection cycle; receiving, in a time slot in the detection cycle, an ultrasonic sweep signal sent by the controlled device; and determining, according to the detection timing and the ultrasonic sweep signal, a detection result of the master device and a controlled device.

First claim

The invention claimed is:

1 . A communication method, performed by a master device, comprising:
determining, according to a number of controlled devices and a preset time slot length, detection cycles and detection timing of various controlled devices in a detection cycle, wherein the controlled devices and the master device are devices located in a same local area network, and a time length of the detection cycle is a product of the preset time slot length and the number of the controlled devices; receiving, in a time slot in the detection cycle, an ultrasonic sweep signal sent by the controlled device; and determining, according to the detection timing and the ultrasonic sweep signal, a detection result of the master device and the controlled device; wherein the communication method further comprises:
sending an ultrasonic synchronization signal to the various controlled devices, and recording a first time in response to determining that the ultrasonic synchronization signal is sent, wherein the ultrasonic synchronization signal comprises timing information enabling the controlled device to return a response signal and second identification information of the controlled device;
receiving the response signals sent by the various controlled devices, and recording a second time in response to determining that the response signal is received, wherein the response signal is an ultrasonic signal generated, according to the timing information comprised in the ultrasonic synchronization signal, by the controlled device; and
sending the first time and the second time to a corresponding controlled device through an ultrasonic wave, wherein the corresponding controlled device determines an acoustic transmission time delay according to the first time and the second time, wherein the acoustic transmission time delay is an acoustic transmission time between the corresponding controlled device and the master device;
wherein the communication method further comprises:
obtaining first identification information of the various controlled devices in the same local area network as the master device; and
allocating, according to the first identification information, the second identification information to the controlled device, wherein a data volume of the second identification information is smaller than that of the first identification information.

2 . The communication method according to claim 1 , wherein the determining, according to the detection timing and the ultrasonic sweep signal, the detection result of the master device and the controlled device comprises:
determining, according to the detection timing, a target controlled device corresponding to the time slot in the time slot; and determining, according to the ultrasonic sweep signal received in the time slot, the detection result of the master device and the target controlled device.

3 . The communication method according to claim 2 , wherein determining, according to the ultrasonic sweep signal received in the time slot, the detection result of the master device and the target controlled device comprises:
obtaining a first ultrasonic sweep signal received by a first microphone of the master device in the time slot and a second ultrasonic sweep signal received by a second microphone of the master device in the time slot, wherein the first microphone and the second microphone are disposed at different positions of the master device; determining, according to the first ultrasonic sweep signal and the second ultrasonic sweep signal, a time difference between the first microphone and the second microphone receiving the first and second ultrasonic sweep signals; and determining, according to the time difference, the detection result of the master device and the target controlled device.

4 . The communication method according to claim 3 , wherein determining, according to the first ultrasonic sweep signal and the second ultrasonic sweep signal, the time difference between the first microphone and the second microphone receiving the first and second ultrasonic sweep signals comprises:
obtaining the time difference by performing correlation peak processing according to the first ultrasonic sweep signal and the second ultrasonic sweep signal.

5 . The communication method according to claim 3 , wherein determining, according to the time difference, the detection result of the master device and the target controlled device comprises:
determining, in response to the time difference being smaller than a preset threshold, the detection result that the master device points to the target controlled device.

6 . The communication method according to claim 3 , wherein determining, according to the time difference, the detection result of the master device and the target controlled device comprises:
determining, in response to the time difference being larger than or equal to a preset threshold, the detection result that the master device does not point to the target controlled device.

7 . The communication method according to claim 3 , wherein
the master device comprises a mobile terminal, and the first microphone and the second microphone are disposed on a top and at a bottom of the mobile terminal respectively.

8 . The communication method according to claim 1 , wherein the communication method further comprises:
outputting, in response to the detection result that the master device points to the controlled device, a control option card of the controlled device on a display interface of the master device.

9 . A communication method, performed by a controlled device, comprising:
receiving detection timing, sent by a master device, of the controlled device in a detection cycle; and determining, according to the detection timing, a corresponding response time of the controlled device in the detection cycle, and sending an ultrasonic sweep signal at the corresponding response time; wherein the communication method further comprises:
receiving an ultrasonic synchronization signal sent by the master device, and recording a third time in response to determining that the ultrasonic synchronization signal is received; wherein the ultrasonic synchronization signal comprises second identification information of the controlled device;
sending, according to parsed timing information comprised in the ultrasonic synchronization signal, a response signal to the master device at a corresponding time, and recording a fourth time in response to determining that the response signal is sent; and
receiving an ultrasonic signal comprising a first time and a second time sent by the master device, and determining, according to the ultrasonic signal and the third time or the fourth time, an acoustic transmission time delay self, wherein the first time is a time in response to determining that the master device sends the ultrasonic synchronization signal; and the second time is a time in response to determining that the master device receives the response signal;
wherein the second identification information is allocated by the master device to a controlled device according to first identification information, a data volume of the second identification information is smaller than that of the first identification information, the controlled device is in the same local area network as the master device, the first identification information is identification information of the controlled device obtained by the master device, and a time length of the detection cycle is a product of a preset time slot length and a number of controlled devices in the same local area network as the master device.

10 . The communication method according to claim 9 , wherein determining,

Assignees

• Beijing Xiaomi Mobile Software Co Ltd

Inventors

• Zhang Yong
• Yi Xinlin
• Zhu Ningzhi
• Shi Runyu
• Wang Kai

Classifications

• G05B2219/2642

  Domotique, domestic, home control, automation, smart house · CPC title

• G05B19/042

  using digital processors (G05B19/05 takes precedence) · CPC title

• H04L12/2823

  Reporting information sensed by appliance or service execution status of appliance services in a home automation network (device-related reporting H04L43/065; arrangements in telecontrol or telemetry systems for selectively calling a substation from a main station, in which substation desired apparatus is selected for applying a control signal thereto or for obtaining measured values therefrom H04Q9/00) · CPC title

• H04B11/00 Primary

  Transmission systems employing ultrasonic, sonic or infrasonic waves · CPC title