A sensor is configured to receive connection information from a portable device via a communication gateway and communicate with a portable device using impulse radio (IR) ultra-wide band (UWB) communication based on the connection information. A location of the portable device is determined based on ranging using IR UWB communication.

A sensor is configured to receive connection information from a portable device via a communication gateway and communicate with a portable device using impulse radio (IR) ultra-wide band (UWB) communication based on the connection information. A location of the portable device is determined based on ranging using IR UWB communication.

Embodiments of this application provide a relative positioning method and a communication apparatus, to optimize an existing relative positioning solution, so as to improve positioning accuracy. The method includes: A first device obtains measurement result information, where the measurement result information includes time measurement result information of arrival of a reference signal at a target positioning assisting node and/or a target terminal device, and angle measurement result information of the target terminal device relative to the target positioning assisting node, the target positioning assisting node includes a first positioning assisting node and a second positioning assisting node, and the target terminal device includes a first terminal device and a second terminal device. The first device determines relative location information of the first terminal device and the second terminal device based on the measurement result information.

Embodiments of this application provide a relative positioning method and a communication apparatus, to optimize an existing relative positioning solution, so as to improve positioning accuracy. The method includes: A first device obtains measurement result information, where the measurement result information includes time measurement result information of arrival of a reference signal at a target positioning assisting node and/or a target terminal device, and angle measurement result information of the target terminal device relative to the target positioning assisting node, the target positioning assisting node includes a first positioning assisting node and a second positioning assisting node, and the target terminal device includes a first terminal device and a second terminal device. The first device determines relative location information of the first terminal device and the second terminal device based on the measurement result information.

A tracking system can provide configuration instructions to an electronic device based on user presence. The tracking system can determine a user's location relative to a geographic boundary surrounding a geographic area associated with the user. Depending on the user's location, the tracking system may send instructions to configure an electronic device to send a notification or change the operating mode of the electronic device in response to the user's presence. The electronic device may be a scanning device that is configured to have a higher or lower scanning frequency, depending on the presence or absence of the user relative to the scanning device.

A tracking system can provide configuration instructions to an electronic device based on user presence. The tracking system can determine a user's location relative to a geographic boundary surrounding a geographic area associated with the user. Depending on the user's location, the tracking system may send instructions to configure an electronic device to send a notification or change the operating mode of the electronic device in response to the user's presence. The electronic device may be a scanning device that is configured to have a higher or lower scanning frequency, depending on the presence or absence of the user relative to the scanning device.

A device for estimating a fixed position of a wireless communication is provided. The device comprises a radio connected to an antenna array, a memory and a process. The radio can receive a first signal transmitted from a first direction by the wireless communication device to the movable device, and a second signal transmitted from a second direction by the wireless communication device to the movable device. The processor can calculate a first angle of arrival (AOA) a second AOA. The processor can estimate the fixed position of the wireless communication device based on the first AOA, the second AOA, the first position and the second position.

A method includes receiving a first bearing estimate associated with a first orientation relative to a first radio source, wherein a first portion of the first plurality of bearing measurements is generated based on a first signal from a first loop antenna and a second portion of the first plurality of bearing measurements is generated based on a second signal from a second loop antenna. The method also includes receiving a second bearing estimate associated with a second orientation relative to a second radio source, wherein a first portion of the second plurality of bearing measurements is generated based on the first signal from the first loop antenna and a second portion of the second plurality of bearing measurements is generated based on the second signal from the second loop antenna. The method also includes determining a location based on the first bearing estimate and the second bearing estimate.

A method includes receiving a first bearing estimate associated with a first orientation relative to a first radio source, wherein a first portion of the first plurality of bearing measurements is generated based on a first signal from a first loop antenna and a second portion of the first plurality of bearing measurements is generated based on a second signal from a second loop antenna. The method also includes receiving a second bearing estimate associated with a second orientation relative to a second radio source, wherein a first portion of the second plurality of bearing measurements is generated based on the first signal from the first loop antenna and a second portion of the second plurality of bearing measurements is generated based on the second signal from the second loop antenna. The method also includes determining a location based on the first bearing estimate and the second bearing estimate.

A method according to an embodiment includes receiving UWB data indicative of a distance of a mobile device relative to the access control device and a SNR of signals received by a plurality of UWB antennas, inferring a side of the passageway at which the mobile device is located based on the distance of the mobile device relative to the access control device and also based on the SNR of the signals, estimating a travel time of the mobile device to the passageway based on the UWB data if the inferred side of the passageway based on the distance of the mobile device is different from the side of the passageway inferred based on the SNR of the signals, and determining the side of the passageway at which the mobile device is located to be an unsecure side of the passageway if the travel time exceeds a predefined threshold time.