US 12,452,815 B2
Sending time determination method and device, and indoor goniometric method and device
Xinlin Yi, Beijing (CN); Yong Zhang, Beijing (CN); Ningzhi Zhu, Beijing (CN); Runyu Shi, Beijing (CN); and Kai Wang, Beijing (CN)
Assigned to BEIJING XIAOMI MOBILE SOFTWARE CO., LTD., Beijing (CN)
Filed by BEIJING XIAOMI MOBILE SOFTWARE CO., LTD., Beijing (CN)
Filed on Nov. 29, 2022, as Appl. No. 18/071,609.
Claims priority of application No. 202210945273.8 (CN), filed on Aug. 8, 2022.
Prior Publication US 2024/0049156 A1, Feb. 8, 2024
Int. Cl. H04W 56/00 (2009.01); G01S 3/802 (2006.01)
CPC H04W 56/0065 (2013.01) [G01S 3/802 (2013.01)] 17 Claims
OG exemplary drawing
 
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.