US 12,349,022 B2
Method for sending recommendation information and positioning service device
Enhui Guan, Beijing (CN); Kui Wu, Beijing (CN); and Hongbo Feng, Beijing (CN)
Assigned to BOE Technology Group Co., Ltd., Beijing (CN)
Appl. No. 17/756,683
Filed by BOE Technology Group Co., Ltd., Beijing (CN)
PCT Filed Apr. 30, 2021, PCT No. PCT/CN2021/091344
§ 371(c)(1), (2) Date May 31, 2022,
PCT Pub. No. WO2022/226966, PCT Pub. Date Nov. 3, 2022.
Prior Publication US 2024/0205640 A1, Jun. 20, 2024
Int. Cl. H04W 4/021 (2018.01); G01S 13/76 (2006.01); H04W 4/02 (2018.01)
CPC H04W 4/021 (2013.01) [G01S 13/765 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A method for sending recommendation information, applied to a positioning service device, and comprising:
receiving feedback signals sent by user terminals within a signal coverage range of the positioning service device, wherein the feedback signals carry first signal strengths and first signal directions of radio-frequency signals sent by the positioning service device and received by the user terminals;
determining, according to the first signal strengths and the first signal directions corresponding to the user terminals, a main region where the user terminals are concentrated within the signal coverage range; and
adjusting a signal sending direction of each of the radio-frequency signals to a direction where the main region is located and sending the recommendation information, wherein the recommendation information is borne by the radio-frequency signals;
wherein the determining, according to the first signal strengths corresponding to the user terminals, the main region where the user terminals are concentrated within the signal coverage range comprises:
dividing the signal coverage range into a plurality of radian-equal fan-shaped regions within the signal coverage range with a location of the positioning service device as a center;
determining each of the user terminals with the first signal strengths reaching a set strength threshold as a valid user terminal, wherein the set strength threshold is a minimum signal strength at which the each user terminal can actually receive a radio-frequency signal normally;
determining a comprehensive feature value of each of the fan-shaped regions according to a total quantity of valid user terminals comprised in the each fan-shaped region and fan-shaped regions adjacent to the each fan-shaped region, first signal strengths of the valid user terminals, and relative locations of the valid user terminals to the center in the signal coverage range; and
determining a fan-shaped region with a largest comprehensive feature value in the plurality of fan-shaped regions as the main region.