Systems and methods to determine a location of a mobile device

A non-transitory computer storage medium storing instructions which when executed on a server, cause the server to perform a method in determining a location of a mobile device, the method comprising:

• storing a map of radio frequency signal characteristics in a region identified in the map;
• receiving, from a transceiver of the mobile device during a period of time, radio frequency signals in the region emitted from a plurality of beacons located in a multi-floor transport corridor within the region;
• determining characteristics of the radio frequency signals received from the transceiver, the characteristics comprising signal strength levels of the radio frequency signals;
• matching the characteristics of the radio frequency signals with the frequency signal characteristics of the map;
• determining a plurality of successive locations based on the matching;
• identifying a pattern of the plurality of successive locations during the period of time;
• in response to the pattern being identified in the plurality of successive locations, discarding the plurality of successive locations in positioning determination of the mobile device;
• computing a weighted average of a first location of the mobile device from the map and a second location of the mobile device from inertial sensor measurements for the mobile device, the weighting based on the confidence level of the plurality of successive locations;
• determining, based on the weighted average, a current location of the mobile device;
• determining a movement speed of the mobile device based on the signal strength levels of the radio frequency signals;
• and
• modifying the current location of the mobile device based on the movement speed of the mobile device and an expected traffic flow along the multi-floor transport corridor.