US 12,216,218 B2
Positioning method and apparatus
Jingsong Huang, Wuhan (CN); Rui Yuan, Wuhan (CN); Yangbo Lin, Shenzhen (CN); and Yi Zhang, Beijing (CN)
Assigned to HUAWEI TECHNOLOGIES CO., LTD., Guangdong (CN)
Filed by HUAWEI TECHNOLOGIES CO., LTD., Guangdong (CN)
Filed on Jun. 10, 2022, as Appl. No. 17/837,605.
Application 17/837,605 is a continuation of application No. 16/460,895, filed on Jul. 2, 2019, abandoned.
Application 16/460,895 is a continuation of application No. PCT/CN2017/116313, filed on Dec. 15, 2017.
Claims priority of application No. 201710001235.6 (CN), filed on Jan. 3, 2017.
Prior Publication US 2022/0350035 A1, Nov. 3, 2022
Int. Cl. G01S 19/44 (2010.01); G01S 19/04 (2010.01)
CPC G01S 19/44 (2013.01) [G01S 19/04 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A positioning method for adjusting positioning carried out by a service center, comprising:
setting an ambiguity adjustment parameter for a mobile device, wherein the ambiguity adjustment parameter is used to record an ambiguity change status used to determine a virtual station observation value of a virtual reference station for the mobile device, wherein the ambiguity adjustment parameter is expressed as: NVRS=1/μρ−φVRS, wherein NVRS is ambiguity of the virtual reference station, λ is a wavelength, ρ is a distance between a satellite and Earth, and φVRS is a carrier observation value of the virtual reference station;
determining that a primary datum station that provides a positioning service for the mobile device switches from a second primary datum station to a first primary datum station, wherein the first primary datum station is a primary datum station of a first serving cell;
obtaining an ambiguity difference between the first primary datum station and the second primary datum station;
updating the ambiguity adjustment parameter to a first ambiguity adjustment parameter based on the ambiguity difference, wherein the first ambiguity adjustment parameter is obtained by summing a second ambiguity adjustment parameter of the mobile device in a second serving cell and the ambiguity difference, and the second primary datum station is a primary datum station of the second serving cell;
adjusting an observation value of the first primary datum station based on a first ambiguity adjustment parameter of the mobile device in the first serving cell to generate a first virtual station observation value, the observation value obtained by the first primary datum station based on a satellite signal received by the first primary datum station, and the first virtual station observation value is used when a position of the mobile device in the first serving cell is determined using a network real time kinematic positioning process; and
sending the first virtual station observation value to the mobile device.