Sending time determination method and device, and indoor goniometric method and device

Patent metadata

Field	Value
Publication number	US-12452815-B2
Application number	US-202218071609-A
Country	US
Kind code	B2
Filing date	Nov 29, 2022
Priority date	Aug 8, 2022
Publication date	Oct 21, 2025
Grant date	Oct 21, 2025

Abstract

A sending time determination method includes: determining a transmission duration and a synchronization error of signal transmission between the device to be measured and a goniometric device; determining a receiving time slot for the goniometric device to receive ultrasonic goniometric signal sent by the device to be measured, where the goniometric device is configured to receive ultrasonic goniometric signals sent by a plurality of devices to be measured, and the goniometer device receives the ultrasonic goniometric signals sent by different devices to be measured in different receiving time slots; and determining a sending time of the ultrasonic goniometric signal according to the receiving time slot, the transmission duration and the synchronization error.

First claim

What is claimed is:

1. A sending time determination method, comprising:
determining, by a first device to be measured, a transmission duration and a synchronization error of signal transmission between the first device and a goniometric device;
determining, by the first device, a receiving time slot for the goniometric device to receive ultrasonic goniometric signal sent by the first device, wherein the goniometric device is configured to receive ultrasonic goniometric signals sent by a plurality of devices to be measured, and the goniometer device receives the ultrasonic goniometric signals sent by different devices to be measured in different receiving time slots; and
determining, by the first device, a sending time of the ultrasonic goniometric signal according to the receiving time slot, the transmission duration and the synchronization error,
wherein determining the transmission duration of the signal transmission between the first device and the goniometric device comprises:
determining a first receiving time for receiving a first synchronization signal sent by the goniometric device;
determining a second sending time for sending a second synchronization signal;
determining a first sending time in response to the goniometric device sending the first synchronization signal and determining a second receiving time in response to the goniometric device receiving the second synchronization signal; and
determining the transmission duration according to the first sending time, the first receiving time, the second sending time and the second receiving time.

2. The method as claimed in claim 1 , wherein determining the synchronization error between the goniometric device and the first device comprises:
determining the synchronization error according to the second sending time, the second receiving time and the transmission duration.

3. The method as claimed in claim 1 , wherein the first synchronization signal comprises at least one of:
first frequency sweep signal;
packet quantity; or
at least one data block;
wherein the first frequency sweep signal is configured for the first device to determine the first receiving time, the packet quantity is configured for indicating a number of data blocks carried in the first synchronization signal, and the data block is configured for carrying first delay information of the first device and identification information of the first device.

4. The method as claimed in claim 3 , wherein determining the second sending time for sending the second synchronization signal comprises:
determining the first delay information corresponding to the first device by parsing the first synchronization signal; and
determining the second sending time according to the first receiving time and the first delay information.

5. The method as claimed in claim 3 , wherein the second synchronization signal comprises second frequency sweep signal, the second frequency sweep signal is configured for the goniometric device to determine the second receiving time, and the second frequency sweep signal is different from the first frequency sweep signal.

6. The method as claimed in claim 1 , wherein determining the first sending time in response to the goniometric device sending the first synchronization signal and determining the second receiving time in response to the goniometric device receiving the second synchronization signal comprises:
receiving third synchronization signal sent by the goniometric device, wherein the third synchronization signal carries the first sending time and the second receiving time.

7. An indoor goniometric method, comprising:
exchanging, by a goniometric device, synchronization signal with a first device to be measured, causing the first device to determine a transmission duration and a synchronization error of signal transmission between the first device and the goniometric device;
indicating, by the goniometric device, to the first device a receiving time slot of ultrasonic goniometric signal, wherein the transmission duration, the synchronization error and the receiving time slot are configured for the first device to determine a sending time of the ultrasonic goniometric signal, and receiving time slots indicated for different devices to be measured are different; and
receiving, by the goniometric device, the ultrasonic goniometric signal sent by the first device in the receiving time slot, and performing indoor goniometric measurement for the first device,
wherein exchanging the synchronization signal with the first device, causing the first device to determine the transmission duration and the synchronization error of the signal transmission between the first device and the goniometric device comprises:
sending first synchronization signal to the first device; and
receiving second synchronization signal sent by the first device;
wherein first sending time and first receiving time of the first synchronization signal, and second sending time and second receiving time of the second synchronization signal are configured for the first device to determine the transmission duration and the synchronization error of the signal transmission between the first device and the goniometric device.

8. The method as claimed in claim 7 , wherein the first synchronization signal comprises at least one of:
first frequency sweep signal;
packet quantity; or
at least one data block;
wherein the first frequency sweep signal is configured for the first device to determine the first receiving time, the packet quantity is configured for indicating a number of data blocks carried in the first synchronization signal, and the data block is configured for carrying first delay information of the first device and identification information of the first device.

9. The method as claimed in claim 7 , wherein the second synchronization signal comprises second frequency sweep signal, the second frequency sweep signal is configured for the goniometric device to determine the second receiving time, and the second frequency sweep signal is different from the first frequency sweep signal.

10. A terminal, comprising:
a processor; and
a memory for storing executable instructions of the processor;
wherein the processor, through running the executable instructions, is configured to:
determine a transmission duration and a synchronization error of signal transmission between the terminal to be measured and a goniometric device;
determine a receiving time slot for the goniometric device to receive ultrasonic goniometric signal sent by the terminal, wherein the goniometric device is configured to receive ultrasonic goniometric signals sent by a plurality of terminals to be measured, and the goniometer device receives the ultrasonic goniometric signals sent by different terminals to be measured in different receiving time slots; and
determine a sending time of the ultrasonic goniometric signal according to the receiving time slot, the transmission duration and the synchronization error,
wherein the processor is further configured to:
determine a first receiving time for receiving first synchronization signal sent by the goniometric device;
determine a second sending time for sending second synchronization signal;
determine a first sending time in response to the goniometric device sending the first synchronization signal and determine a second receiving time in response to the goniometric device receiving the second synchronization signal; and
determine the transmission duration according to the first sending time, the first receiving time, the second sending time and the second receiving time.

11. The terminal as claimed in claim 10 , wherein the processor

Assignees

• Beijing Xiaomi Mobile Software Co Ltd

Inventors

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

Classifications

• G01S3/802

  Systems for determining direction or deviation from predetermined direction · CPC title

• G01S2201/02

  Indoor positioning, e.g. in covered car-parks, mining facilities, warehouses · CPC title

• G01S5/18

  using ultrasonic, sonic or infrasonic waves · CPC title

• H04L5/0078

  Timing of allocation · CPC title

• H04L5/0053

  Allocation of signalling, i.e. of overhead other than pilot signals · CPC title