A method of tracking entry to and exit from a confined space includes a portable radio beacon placed proximate to but outside the confined space transmitting a first radio signal with an identifier that is associated with the confined space. A mobile device receives the first radio signal, measures a first real-time value of a first measure of received signal strength or quality, and transmits a second radio signal with the identifier and the first real-time value. A base station receives the second radio signal, measures a second real-time value of a second measure of received signal strength or quality, and transmits data including the identifier, and the first and second real-time values. A computer receives the data, determines proximity of the mobile device to the confined space from the identifier, and determines whether the mobile device is outside or inside the confined space from the real-time values.

According to an aspect, there is provided an apparatus (52) for determining whether a subject has entered or exited a building, wherein the apparatus (52) is configured to obtain air pressure measurements from an air pressure sensor (58; 60) associated with the subject, wherein the air pressure measurements comprise a first plurality of air pressure measurement samples; determine one or more of: a first autocorrelation signal for the first plurality of air pressure measurement samples at a first time lag; a distribution of air pressures for the first plurality of air pressure measurement samples; a distribution of air pressure differences for the first plurality of air pressure measurement samples, wherein each air pressure difference is the difference between the value of a first air pressure measurement sample in the first plurality of air pressure measurement samples and the value of an air pressure measurement sample in the first plurality of air pressure measurement samples that is a second time lag before the first air pressure measurement sample; and analyse the determined first autocorrelation signal, the determined distribution of air pressures and/or determined distribution to determine one or more indications of whether the subject has entered or exited a building; and determine whether the subject has entered or exited a building based on the determined one or more indications. A corresponding computer-implemented method and computer program product are also provided.

An indoor/outdoor determination program, etc., whereby an indoor or outdoor state can be determined with higher precision than by a determination method based on satellite reception strength in which a threshold value is difficult to set. The indoor/outdoor determination program according to the present invention causes a step to be executed for determining whether a mobile terminal is present indoors or outdoors on the basis of satellite elevation angle information and/or satellite azimuth angle information acquired directly or indirectly from a satellite receiver provided to the mobile terminal.

Disclosed is an electronic device including a first circuit for measuring positions using a first positioning method; a second circuit for measuring positions using a second positioning method; a memory for storing information on a service zone; and a processor is configured to identify a first position using the first circuit; determine whether the first position is included in the service zone; identify a second position using the second circuit when the first position is included in the service zone; and determine the second position to be a position of the electronic device.

A device and a backend server are described. The device can determine whether it has entered an indoor location, and once in the indoor location, the device can communicate with the server the name of the location. The device can determine the current location of the user in the indoor location, and based on the floorplan and the indoor location of an item, the device can direct the user to the item. The floorplan can be constructed based on data accumulated from various visitors of the indoor location.

A mobile communication device. The device comprises a cellular radio transceiver, a GPS receiver, a processor, a memory, and a self-locating application stored in the memory. When executed by the processor the application monitors a received signal strength of the radio transceiver, in response to detecting a rate of cellular radio signal strength increase above a first threshold, obtains GPS coordinates of the device from the GPS receiver and an identity of a serving cell site, stores the GPS coordinates with the identity of the serving cell site in the memory, and in response to detecting a rate of cellular radio signal strength decrease below a second predefined threshold and determining that the cellular radio transceiver is served by the serving cell site associated with the GPS coordinates stored in the memory, determines that the device is at the location associated with the GPS coordinates stored in the memory.

A mobile terminal control method includes receiving N direction-finding signals that are respectively sent by a multiple-antenna node at N moments, where the multiple-antenna node is located in an indoor-outdoor critical area. The method includes obtaining N pieces of location relationship information between a mobile terminal and the multiple-antenna node at the N moments according to the N direction-finding signals, where the N moments and the N pieces of location relationship information are in a one-to-one correspondence. The method includes determining location relationship change information between the mobile terminal and the multiple-antenna node according to at least M of the N pieces of location relationship information, where 2MN. The method includes controlling the mobile terminal by matching the location relationship change information and according to the location relationship change information.

A device and a backend server are described. The device can determine whether it has entered an indoor location, and once in the indoor location, the device can communicate with the server the name of the location. The device can determine the current location of the user in the indoor location, and based on the floorplan and the indoor location of an item, the device can direct the user to the item. The floorplan can be constructed based on data accumulated from various visitors of the indoor location.

Embodiments of the disclosure provide systems and methods for positioning a gateway of an architecture. The method may include determining a trajectory of a mobile device based on motion data acquired by the mobile device and a movement model, acquiring a first end position of the trajectory of the mobile device, detecting that the mobile device enters or exits the architecture, and determining a second end position of the trajectory upon the detection as the position of the gateway.

This application provides a positioning method and apparatus. The method includes: obtaining, by a positioning apparatus, information about a transmission environment of each channel in a plurality of channels for a terminal device; determining, by the positioning apparatus, a target channel from the plurality of channels based on the information about the transmission environment of each channel; and locating, by the positioning apparatus, the terminal device based on positioning measurement information of the target channel. The positioning method and apparatus provided in this application helps improve positioning accuracy.