Positioning Method and Electronic Device

Abstract

A positioning method includes calculating, based on data that is of collection points at a road edge and that is collected by a radar, a feature of a road on which a terminal device is actually located, determining, from a plurality of candidate roads based on the feature of the road on which the terminal device is actually located and features of the plurality of candidate roads, a target road matching original positioning coordinates of the terminal device, and correcting the original positioning coordinates using the target road, to obtain corrected positioning coordinates.

What is claimed is: 
     
         1 . A positioning method, comprising:
 obtaining first coordinates of a terminal device, a road feature of a first road on which the terminal device is located, and candidate road features describing features of a plurality of candidate roads, wherein each of the plurality of candidate roads is located in a first range of the first coordinates, and wherein the road feature is from a sensor of the terminal device and indicates a change in a shape of the first road;   selecting a target road from the plurality of candidate roads based on the road feature and the candidate road features; and   matching the first coordinates to the target road to obtain corrected coordinates of the terminal device.   
     
     
         2 . The positioning method of  claim 1 , wherein the candidate road features comprise candidate road types describing types of the plurality of candidate roads, and wherein the positioning method further comprises:
 determining, based on the road feature, a road type describing a type of the first road; and   further selecting the target road from the plurality of candidate roads further based on the road type.   
     
     
         3 . The positioning method of  claim 2 , wherein the road type is elevated or non-elevated, and wherein the candidate road types are elevated or non-elevated. 
     
     
         4 . The positioning method of  claim 2 , wherein the terminal device is within an intersection range, wherein the positioning method further comprises determining, based on the road feature, an intersection type describing a type of an intersection at which the terminal device is located, and wherein the intersection type is an elevated road intersection or a non-elevated road intersection. 
     
     
         5 . The positioning method of  claim 4 , wherein the road feature meets a preset threshold, and wherein the positioning method further comprises determining the intersection type. 
     
     
         6 . The positioning method of  claim 1 , wherein the road feature is based on data of a plurality of collection points of a road divider that is located on an edge of the first road, and wherein the plurality of collection points are collection points at which the sensor collects data on the road divider. 
     
     
         7 . The positioning method of  claim 6 , wherein the road feature comprises at least one of a first average value of slopes of the road divider at the plurality of collection points, a first variance of the slopes, a second average value of distances between the plurality of collection points and the terminal device, or a second variance of the distances. 
     
     
         8 . The positioning method of  claim 1 , further comprising:
 obtaining second coordinates of a moving target, wherein the second coordinates are relative to the sensor;   calculating a movement feature of the moving target based on the second coordinates, wherein the movement feature indicates a movement state of the moving target; and   determining, based on the movement feature, a road type of the first road.   
     
     
         9 . The positioning method of  claim 8 , wherein the movement feature is at least one of a movement speed of the moving target or a slope of a movement track of the moving target. 
     
     
         10 . The positioning method of  claim 1 , further comprising calculating a matching degree between each of the plurality of candidate roads and the first coordinates, wherein a first matching degree of a first candidate road of the plurality of candidate roads that has a same type as the first road is greater than a second matching degree of a second candidate road of the plurality of candidate roads that has a different type from the first road, and wherein the target road is one of the plurality of candidate roads that has a highest degree of matching with the first coordinates. 
     
     
         11 . An electronic device, comprising:
 a sensor configured to obtain a road feature of a first road on which the electronic device is located, wherein the road feature indicates a change in a shape of the first road; and   a processor coupled to the sensor and configured to cause the electronic device to be configured to:
 obtain first coordinates of the electronic device, the road feature of the first road, and candidate road features describing features of a plurality of candidate roads, wherein each of the plurality of candidate roads is located in a first range of the first coordinates; 
 select a target road from the plurality of candidate roads based on the road feature and the candidate road features; and 
 match the first coordinates to the target road to obtain corrected coordinates of the electronic device. 
   
     
     
         12 . The electronic device of  claim 11 , wherein the candidate road features comprise candidate road types describing types of the plurality of candidate roads, and wherein the processor is further configured to cause the electronic device to:
 determine, based on the road feature, a road type describing a type of the first road; and   select the target road from the plurality of candidate roads further based on the road type.   
     
     
         13 . The electronic device of  claim 12 , wherein the road type is elevated or non-elevated, and wherein the candidate road types are elevated or non-elevated. 
     
     
         14 . The electronic device of  claim 12 , wherein the electronic device is within an intersection range, wherein the processor is further configured to cause the electronic device to determine, based on the road feature, an intersection type describing a type of an intersection at which the electronic device is located, and wherein the intersection type is an elevated road intersection or a non-elevated road intersection. 
     
     
         15 . The electronic device according to  claim 14 , wherein the road feature meets a preset threshold, and wherein the processor is further configured to determine the intersection type. 
     
     
         16 . The electronic device of  claim 11 , wherein the road feature is based on data of a plurality of collection points of a road divider that is located on an edge of the first road, and wherein the plurality of collection points are collection points at which the sensor collects data on the road divider. 
     
     
         17 . The electronic device of  claim 16 , wherein the road feature comprises at least one of a first average value of slopes of the road divider at the plurality of collection points, a first variance of the slopes, a second average value of distances between the plurality of collection points and the electronic device, or a second variance of the distances. 
     
     
         18 . The electronic device of  claim 11 , wherein the processor is further configured to cause the electronic device to:
 obtain second coordinates of a moving target, wherein the second coordinates are relative to the sensor;   calculate a movement feature of the moving target based on the second coordinates, wherein the movement feature indicates a movement state of the moving target; and   determine, based on the movement feature, a road type of the first road.   
     
     
         19 . The electronic device of  claim 18 , wherein the movement feature is at least one of a movement speed of the moving target or a slope of a movement track of the moving target. 
     
     
         20 . The electronic device according to  claim 11 , wherein the processor is further configured to calculate a matching degree between each of the plurality of candidate roads and the first coordinates, wherein a first matching degree of a first candidate road of the plurality of candidate roads that has a same type as the first road is greater than a second matching degree of a second candidate road of the plurality of candidate roads that has a different type from the first road, and wherein the target road is one of the plurality of candidate roads that has a highest degree of matching with the first coordinates.