Measurements for indoor navigation
First Claim
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; and
receiving, 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.
1 Assignment
0 Petitions
Accused Products
Abstract
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.
12 Citations
32 Claims
-
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; and receiving, 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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
-
-
9. A mobile device comprising:
-
a transceiver; and a measurement module communicatively coupled to the transceiver and configured to; perform a passive measurement for signals from access points to establish a first set of the access points comprising at least a subset of all of the access points from which the mobile device receives the signals; perform a first active measurement for the first set of the access points, wherein to perform the first active measurement the measurement module is configured to; transmit at least one first communication, via the transceiver, toward at least one of the access points of the first set of the access points; and receive at least one second communication, via the transceiver from the at least one of the access points of the first set of the access points, which corresponds to, and is responsive to, one of the at least one first communication; wherein the measurement module is configured to perform each of the passive measurement and the first active measurement 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 perform a second active measurement repeatedly and more frequently than the first active measurement, wherein to perform the second active measurement the measurement module is configured to; transmit at least one third communication toward at least one access point of a second set of the access points; and receive at least one fourth communication which corresponds to the at least one third communication. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
-
-
17. A mobile device comprising:
-
passive measuring means for performing a passive measurement for signals from access points to establish a first set of the access points comprising at least a subset of all the access points from which the mobile device receives the signals; first active measuring means for performing a first active measurement for the first set of the access points, wherein for performing the first active measurement the first active measuring means is configured to; transmit at least one first communication toward at least one of the access points of the first set of the access points; and receive, 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 measuring means and the first active measuring means are configured to perform each of the passive measurement and the first active measurement 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 second active measuring means for performing a second active measurement repeatedly and more frequently than the first active measurement, wherein for performing the second active measurement the second active measuring means is configured to; transmit at least one third communication toward at least one access point of a second set of the access points; and receive at least one fourth communication which corresponds to the at least one third communication. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24)
-
-
25. A processor-readable storage medium comprising processor-readable instructions configured to cause a processor to:
-
perform a passive measurement for signals from access points to establish a first set of the access points comprising at least a subset of all of the access points from which the mobile device receives the signals; perform a first active measurement for the first set of the access points, wherein to perform the first active measurement the instructions are configured to cause the processor to; transmit at least one first communication toward at least one of the access points of the first set of the access points; and receive, 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, one of the at least one first communication; wherein the instructions are configured to cause the processor to perform each of the passive measurement and the first active measurement 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 perform a second active measurement repeatedly and more frequently than the first active measurement, wherein to perform the second active measurement the instructions are configured to cause the processor to; transmit at least one third communication toward at least one access point of a second set of the access points; and receive at least one fourth communication which corresponds to the at least one third communication. - View Dependent Claims (26, 27, 28, 29, 30, 31, 32)
-
Specification