| 主权项 |
1. A system for using location data to infer a place name of a user, wherein the system is configured to receive location readings and sensor data from multiple mobile devices wirelessly coupled to a network, the system comprising:
at least one data storage device for storing a place database, reference data, a sequence of location readings, and sensor data,
wherein the place database includes place information and corresponding geo-location data,wherein the reference data links a user or a user's mobile device to a proposed place at an instance of time, andwherein the sequence of location readings includes latitude and longitude coordinate data and an associated time; at least one server coupled to the data storage device, wherein the server is configured to:
classify a sliding window of N contiguous location readings over the sequence of location readings as moving or not moving, wherein N is an integer number of location readings;segment the sequence of location readings into two or more location clusters;identify a centroid or sub-centroids of each of the two or more location clusters;query the place database to identify two or more candidate places that are within a predetermined radius of the centroid of the cluster;extract a feature from the candidate places, wherein the feature includes a place category, popularity, or hours of operation; andcalculate a probability that the user is located at each of the candidate places, wherein the probability is based on features of the candidate places. |
