Positioning method and apparatus, and offline fingerprint database generation method and apparatus

An offline fingerprint database generation method, comprising:

• receiving, by a positioning server, M location fingerprint features from a terminal device, wherein the M location fingerprint features comprise M first locations and information about a plurality of base stations in total, the plurality of base stations include M serving base stations in cells of the M first locations and N neighboring cell base stations corresponding to the M serving base stations, and the M location fingerprint features comprise cell identities CellIDs, signal identifiers, and channel parameters of the M serving base stations, and signal identifiers and channel parameters of the N neighboring cell base stations;
• matching, by the positioning server, the CellIDs of the M serving base stations with the signal identifiers and the channel parameters in the information about the plurality of base stations, to generate P offline fingerprints, wherein P is greater than M, wherein the P offline fingerprints are stored in an offline fingerprint database of the positioning server;
• each offline fingerprint comprises a CellID, a signal identifier, and a channel parameter that are of a base station, and a reference point location, wherein M, N, and P are positive integers;
• and
• the CellID comprised in each offline fingerprint is a CellID of any one of the M serving base stations, and the reference point location is related to a first location corresponding to the CellID carried in the offline fingerprint;
• and
• sending, by the positioning server, the offline fingerprint database to the terminal device.

A positioning apparatus, comprising a processor, a transceiver, and a memory, wherein the memory stores instructions, which when executed by the processor, cause the positioning apparatus to perform, using the transceiver, operations comprising:

• collecting a location fingerprint, wherein the location fingerprint comprises a signal identifier of a first base station, a cell identity (CellID) of the first base station, signal identifiers of Q neighboring cell base stations of the first base station, and channel parameters of the Q neighboring cell base station, wherein the first base station is a serving base station accessed by the positioning apparatus and Q is a positive integer;
• searching using the CellID of the first base station, an offline fingerprint database for a first offline fingerprint that matches the CellID of the first base station, wherein the offline fingerprint database is stored in the positioning apparatus, and the offline fingerprint database is configured to manage a plurality of offline fingerprints, wherein each offline fingerprint comprises a CellID, a signal identifier, and a channel parameter that are of a base station, and a reference point location;
• searching based on a reference point location in the first offline fingerprint and the channel parameters of the Q neighboring cell base stations, the offline fingerprint database for a plurality of second offline fingerprints that satisfy a first condition, wherein the first condition is that a channel parameter carried in an offline fingerprint is the same as one of the channel parameters of the Q neighboring cell base stations, and a reference point location carried in the offline fingerprint is within a first neighboring cell base station search range, wherein the first neighboring cell base station search range is a limited area comprising the reference point location in the first offline fingerprint;
• and
• determining a location of the positioning apparatus based on a signal identifier and the reference point location in the first offline fingerprint, signal identifiers and reference point locations in the plurality of second offline fingerprints, and the Q+1 signal identifiers in the location fingerprint.

An offline fingerprint database generation apparatus, comprising a processor, a transceiver, and a memory, wherein the memory stores instructions, which when executed by the processor, cause the apparatus to perform, using the transceiver, the operations comprising:

• receiving M location fingerprint features from a terminal device, wherein the M location fingerprint features comprise M first locations and information about a plurality of base stations in total, the plurality of base stations are M serving base stations in cells of the M first locations and N neighboring cell base stations corresponding to the M serving base stations, and the M location fingerprint features comprise cell identities CellIDs, signal identifiers, and channel parameters of the M serving base stations, and signal identifiers and channel parameters of the N neighboring cell base stations;
• matching the CellIDs of the M serving base stations with the signal identifiers and the channel parameters in the information about the plurality of base stations, to generate P offline fingerprints, wherein P is greater than M, wherein the P offline fingerprints are stored in an offline fingerprint database of the positioning server, and wherein each offline fingerprint comprises a CellID, a signal identifier, and a channel parameter that are of a base station, and a reference point location, wherein M, N, and P are positive integers;
• and
• the CellID comprised in each offline fingerprint is a CellID of any one of the M serving base stations, and the reference point location is related to a first location corresponding to the CellID carried in the offline fingerprint;
• and
• sending the offline fingerprint database to the terminal device.