MOBILE DEVICE LOCATION DETERMINATION USING WI-FI SIGNALS

摘要

A location of a mobile device is determined using Wi-Fi signals. The location of a moving mobile device may be initially determined using a satellite navigation system. When the speed at which the mobile deice is moving falls below a threshold, a determination is made as to whether Wi-Fi signals are receivable at the mobile device. If Wi-Fi is receivable, Wi-Fi signals are used to determine the location of the mobile device rather than the satellite navigation system. The Wi-Fi signals are continuously or repeatedly used to identify the location of the mobile device until the speed at which the mobile device is moving surpasses the threshold or until Wi-Fi signals are no longer receivable at the mobile device. Since Wi-Fi sensors of mobile devices consume less power than satellite navigation sensors, the power consumption of the mobile device is reduced when mobile device location is determined using Wi-Fi signals.

主权项

1. A computer-implemented method comprising:
identifying an initial location of a mobile device using a satellite system; determining, using a processor of the mobile device and using the satellite system, a first speed at which the mobile device is moving; and determining, using the processor, whether the first speed is below a threshold; in the event that the first speed is below the threshold, identifying a subsequent location of the mobile device using Wi-Fi signals, wherein the satellite system is not used to determine the subsequent location of the mobile device, wherein the Wi-Fi signals are received from Wi-Fi access points, each Wi-Fi access point being associated with an identifier, each identifier being stored in memory of the mobile device; determining a direction of movement of the mobile device based on the Wi-Fi access points from which the Wi-Fi signals are received; predicting a route of the mobile device as the mobile device moves based on the direction of movement of the mobile device and the stored identifiers associated with the Wi-Fi access points; retrieving selected ones of the stored identifiers that correspond to the Wi-Fi access points associated with the predicted route; and actively scanning for the Wi-Fi access points associated with the predicted route.