Measurements for indoor navigation

摘要

A method of obtaining and using access point signal information includes: receiving signals at a mobile device from a first set of access points during a passive measurement; and performing a first active measurement at the mobile device for the first set of the access points, including: sending at least one first communication each sent toward a respective one of the access points of the first set; and receiving at least one second communication each corresponding to, and responsive to, one of the at least one first communication and received from a corresponding one of the access points of the first set; where the passive measurement and the first active measurement is each performed repeatedly with the first set of the access points being reestablished at each repeat performance of the passive measurement, and with the passive measurement being performed less often than the first active measurement.

主权项

1. A method for performing signal measurements, the method comprising:
performing a passive measurement at a mobile device for signals from access points to establish a first set of the access points comprising at least a sublet of all of the access points from which the mobile device receives the signals; performing a first active measurement at the mobile device for the first set of the access points, the first active measurement including:
transmitting at least one first communication toward at least one of the access points of the first set of the access points; andreceiving, from the at least one of the access points of the first set of the access points, at least one second communication which corresponds to, and is responsive to, the at least one first communication;wherein the passive measurement and the first active measurement is each performed repeatedly with the first set of the access points being reestablished at each repeat performance of the passive measurement, and with the passive measurement being performed less often than the first active measurement; and performing a second active measurement repeatedly at the mobile device, with the second active measurement being performed more frequently than the first active measurement, the second active measurement including: transmitting at least one third communication toward at least one access point of a second set of the access points; and receiving at least one fourth communication which corresponds to the at least one third communication.