Positioning method and apparatus

A positioning apparatus for adjusting positioning carried out by a service center, comprising:

• a memory storing program instructions;
• and
• a processor, coupled with the memory, configured to invoke the program instructions to perform operations, 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.

A non-transitory computer-readable storage medium, wherein the computer-readable medium stores program code to be executed by a device, and when the program code is executed by the device the devise is configured to perform operations for adjusting positioning carried out by a service center, the operations 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.