Some embodiments are directed to a method and a system allowing moving tags to be discriminated from stationary tags, which can be used in the field of tracking merchandise or objects provided with RFID tags.

A system for determining a bearing or location of a radio frequency identification (RFID) tag using a handheld RFID reader is described. In one embodiment, the reader is equipped with an accelerometer. A user moves the reader while the reader receives the tag's signal and determines the tag signal's phase at multiple locations. The locations of the reader antenna can be reconstructed using the accelerometer data. By using the phase determined at multiple locations in conjunction with the location of the reader antenna, the reader can determine the bearing of the tag. For an RFID reader not equipped with an accelerometer, the sign and ratio of the rate of change in the phase of a tag's signal to the distance traveled by the reader antenna can be used to determine the location of the tag relative to the reader.

A system for determining a bearing or location of a radio frequency identification (RFID) tag using a handheld RFID reader is described. In one embodiment, the reader is equipped with an accelerometer. A user moves the reader while the reader receives the tag's signal and determines the tag signal's phase at multiple locations. The locations of the reader antenna can be reconstructed using the accelerometer data. By using the phase determined at multiple locations in conjunction with the location of the reader antenna, the reader can determine the bearing of the tag. For an RFID reader not equipped with an accelerometer, the sign and ratio of the rate of change in the phase of a tag's signal to the distance traveled by the reader antenna can be used to determine the location of the tag relative to the reader.

An operating method of a user terminal, the operating method includes: configuring a first ultra-wide band (UWB) network corresponding to a target user based on first objects including the user terminal dependent on the target user, a UWB communication module including any one or any combination of any two or more of a UWB sensor, a UWB antenna, and a UWB tag; searching for a second UWB network corresponding to a multi-user adjacent to the first UWB network; obtaining, based on a result of the searching, relative position information between the target user and the multi-user by connecting the first UWB network to the second UWB network; and performing, based on the relative position information, interaction and information sharing between the target user and the multi-user.

Determining a relative location of an object in an environment of a head-mountable device by performing a Wi-Fi round trip time (RTT) process to determine a location of the head-mountable device based on respective round-trip times for a plurality of access points or peer devices, using data generated by an inertial measurement unit as a basis for determining a pose of the head-mountable device, determining a location of a first object in an environment of the head-mountable device, and based at least in part on the location and pose of the head mountable device and the location of the first object, determining a relative location of the first object.

A method operates a counter device for a fluid which can be connected via a connecting device to a meter point having at least one line through which the fluid flows. A control device is configured when connected via at least one operating parameter specific for the meter point and/or a meter point environment. When the counter device is taken into operation, the operating parameters are called up by a communication device on the counter device side communicating wirelessly by radio via a communication link with a passive communication device on the meter point side. The operating parameters are stored in a storage device of the passive communication device.

A method operates a counter device for a fluid which can be connected via a connecting device to a meter point having at least one line through which the fluid flows. A control device is configured when connected via at least one operating parameter specific for the meter point and/or a meter point environment. When the counter device is taken into operation, the operating parameters are called up by a communication device on the counter device side communicating wirelessly by radio via a communication link with a passive communication device on the meter point side. The operating parameters are stored in a storage device of the passive communication device.

The present invention discloses a method and an apparatus for localization and mapping based on RFID, applicable for real-time mapping of an area to be localized in which at least one RFID tag is arranged, the method comprises: taking a location of a first RFID tag as a coordinate origin of a coordinate system when information of the first RFID tag is obtained by a mobile electronic device which is moving along a certain trajectory for a first time; moving the mobile electronic device with the coordinate origin as a starting point to traverse the entire area to be localized, calculating coordinates of an obstacle based on a location of the mobile electronic device when the mobile electronic device detects the obstacle; constructing a map based on the recorded information and coordinates of the RFID tags and coordinates of each obstacle when the traversal has been finished.

A method of validating a set of location sensors deployed in a facility includes: receiving sensor data from at least a subset of the location sensors; generating a current location of a mobile reference target within the facility based on (i) the sensor data and (ii) expected positions corresponding to the location sensors; based at least on the current location: (i) selecting at least one of the location sensors, and (ii) setting an inspection indicator for the selected location sensor; presenting sensor status data including the inspection indicator via an output device associated with the mobile reference target; and repeating the generating, the selecting, the setting, and the presenting until inspection indicators have been set for each of the location sensors.

A radio frequency (RF) imaging device comprises an RF sensor assembly, a position sensor, a processor, and a memory. The RF sensor assembly receives an RF signal for capturing an RF image of a portion of a space behind a surface. The position sensor receives a plurality of signals respectively emitted by a plurality of position markers at known positions relative to the surface. The processor determines a plurality of angles at which the plurality of signals respectively arrive at the position sensor and determines, based on the plurality of angles and the known positions of the plurality of position markers, a position of the RF imaging device relative to the surface. The memory stores the RF image in association with the determined position of the RF imaging device. A time-of-flight or triangulation of signal data may be used for position determination.