Techniques for suggesting accessory devices controlled by an application executing on a mobile device are disclosed. A method includes measuring one or more sensor values to determine a data point at each of a plurality of first times, associating an accessory device with each of the data points, clustering the data points within a threshold distance of each other to create a plurality of clusters. The method also includes, after clustering the data points, measuring one or more sensor values to determine one or more current data points at a second time, determining that one or more current data points at the second time corresponds to a first cluster of the plurality of clusters, identifying a first accessory device associated with one or more of the data points in the first cluster, and providing a message using the application.

A mobile computer may determine it is located in a vehicle or a conveyance based on a measured distance, satellite related positioning information, and a touch input.

A system and method for providing a descriptive location of a first user device. The method includes: receiving a request to determine an updated descriptive location pointer for the second user device; receiving data associated with the first user device and at least one radio frequency (RF) signal; and determining an updated descriptive location pointer for the second user device based on a unique identifier collected by the first user device, the data associated with the first user device, and the at least one RF signal, wherein the unique identifier is created by the first user device based on data and RF signals received by the first user device during a learning phase, wherein the unique identifier is associated with at least one predetermined descriptive location pointer, wherein the updated descriptive location pointer is determined from among the at least one predetermined descriptive location pointer.

A location determining method 200 for sensor apparatus placements in building includes: a step in which a first measuring device transmits a digitally modulated first test packet through a specific channel at a first location in a building (210); a step in which a second measuring device receives the first test packet and transmits a first echo back signal through the specific channel at a second location in the building (220); a step in which the first measuring device receives the first echo back signal transmitted from the second measuring device and measures a first channel quality of the specific channel based on the first echo back signal (230); a step in which the first measuring device transmits a digitally modulated second test packet through the specific channel (240); a step in which the second measuring device receives the second test packet and transmits a second echo back signal through the specific channel (250); and a step in which the first measuring device receives the second echo back signal transmitted from the second measuring device and measures a second channel quality of the specific channel based on the second echo back signal (260).

Techniques for suggesting accessory devices controlled by an application executing on a mobile device are disclosed. A method includes measuring one or more sensor values to determine a data point at each of a plurality of first times, associating an accessory device with each of the data points, clustering the data points within a threshold distance of each other to create a plurality of clusters. The method also includes, after clustering the data points, measuring one or more sensor values to determine one or more current data points at a second time, determining that one or more current data points at the second time corresponds to a first cluster of the plurality of clusters, identifying a first accessory device associated with one or more of the data points in the first cluster, and providing a message using the application.

A method and system for detecting a transition in positioning state of a mobile device relative to an indoor facility. The method, executed in a processor of the mobile device, comprises monitoring, based at least in part on global positioning system (GPS) data, for a positioning state of the mobile device as one of an indoor and an outside location relative to an indoor facility, determining a set of probabilistic weightings for respective ones of ambient data and the GPS data, the ambient data including one or more of received signal strength data, signal connectivity data, magnetic data, ambient lighting data and barometric data, and detecting a transition in positioning state of the mobile device from one of the indoor and the outside locations to another of the indoor and the outside locations when a weighted sum value based at least in part on the set of probabilistic weightings is one of above and below a predetermined state transition value.

This specification describes a method comprising causing a trackable device to transition between a first positioning mode and a second positioning mode, wherein, in the first positioning mode, the trackable device causes wireless transmission of one or more data packets each including a data portion for enabling determination of a bearing between the trackable device and a locator device and, in the second positioning mode, the trackable device causes wireless transmission of one or more data packets which do not include the data portion for enabling determination of the bearing between the trackable device and the locator device.

Positioning mobile devices in a three-dimensional space includes receiving multiple traces, each trace corresponding to a sequence of atmospheric pressure readings from a respective mobile device, receiving indications of signals received by the mobile devices from signal sources concurrently with the atmospheric pressure readings, generate similarity metrics for the multiple traces using the indications of other signals received by the mobile devices, the similarity metrics being indicative of associations between the signal sources and the atmospheric pressure readings, and determine estimated changes in elevation over time for the multiple traces using the generated similarity metrics.

A method for determining the location of a frequency receiver device with respect to at least two frequency originator devices, each of a current location, the method including synchronizing a clock of the frequency receiver device with a clock of one of the at least two frequency originator devices; receiving by the frequency receiver device, a message including an identification code configured for identifying one of the at least two frequency originator devices and obtaining a broadcast time and a current location of the one of the at least two frequency originator devices by looking up a table correlating the at least two frequency originator devices and their respective broadcast times and current locations; calculating a time of flight of the message by calculating the difference between a receive time at which the message is received by the frequency receiver device and the broadcast time.

A method for indoor positioning includes obtaining a WI-FI positioning result of an apparatus, the WI-FI positioning result comprising first position information of the apparatus; determining at least three base stations according to the WI-FI positioning result; determining a base station positioning result of the apparatus according to the at least three base stations, the base station positioning result comprising second position information of the apparatus; and determining an actual position of the apparatus according to the first position information and the second position information. An apparatus and a non-transitory computer readable medium comprising the method of establishing a precise indoor positioning of the apparatus are also disclosed.