Monitoring a location fingerprint database

摘要

Methods, program products, and systems for monitoring a location fingerprint database are described. A location fingerprint database can store location data associated with multiple signal sources. A mobile device can use signals of the signal sources and the location data to determine a current location. A location server can monitor the location fingerprint database, including detecting if any one of the signal sources has moved or otherwise becomes unsuitable for location determination. The location server can prevent location data associated with the unsuitable signal source from being used by the mobile device to determine the current location of the mobile device

主权项

1. A method comprising:
receiving, by a server and from a mobile device, an identifier of a signal source and a device location, the device location being a location at which the mobile device detected a signal of the signal source, the device location being determined independently of the signal source; determining, by the server, that the identifier of the signal source is stored in a location fingerprint database and in association with a signal source location, the signal source and the signal source location usable for determining an estimated location of a pedestrian located at a venue, the venue comprising a space accessible by the pedestrian and one or more constraints of movements of the pedestrian; determining, by the server and based on the received device location, a calculated location of the signal source; determining, by the server, that a distance between the calculated location of the signal source and the signal source location stored in the location fingerprint database exceeds a reliability threshold; upon determining that the distance exceeds the reliability threshold, modifying the location fingerprint database, including modifying the signal source location stored in the location fingerprint database; determining, by the server, that a distance between the updated signal source location and a second venue satisfies a fingerprint threshold where the signal source is usable for determining an estimated location of a second pedestrian located at the second venue; and in response, submitting, by the server and to one or more sampling devices, a request for conducting a fingerprint survey at the second venue to generate one or more measurements of the second venue, the one or more measurements usable by the server to determine a location fingerprint of the second venue, wherein the server comprises one or more computers.