An electronic building automation system, comprising one or more electronic building automation devices, comprising a beacon receiver arranged to receive localizing beacon signals transmitted from multiple beacons, a processor circuit configured to generate a service request comprising the beacon identifiers stored in the beacon identifier memory, the control computer arranged to generate a servicing message comprising data localizing the building automation device, said data being obtained from the beacon identifiers in the received service request.

An electronic building automation system, comprising one or more electronic building automation devices, comprising a beacon receiver arranged to receive localizing beacon signals transmitted from multiple beacons, a processor circuit configured to generate a service request comprising the beacon identifiers stored in the beacon identifier memory, the control computer arranged to generate a servicing message comprising data localizing the building automation device, said data being obtained from the beacon identifiers in the received service request.

A radio transmitter in a first radio communication device transmits first position information and first time information to a radio receiver of a vehicle. Also, a radio transmitter in a second radio communication device transmits second position information and second time information to the radio receiver. When the radio receiver of the vehicle receives the respective pieces of information, a position specification processing unit specifies the position of the vehicle based on the received pieces of information. Thus, the position of the vehicle can be specified with high accuracy even when signals from GNSS satellites cannot be received.

The invention relates to a network of communicating survey nails (10) that each comprise an active radiofrequency identification beacon, comprising: a stand-alone electrical power source for powering a transmitter and a storage means; the storage means for storing a unique identifier and nail position data; the transmitter of a radiofrequency signal compliant with an RFID protocol comprising said unique identifier and said nail position data, the transmitter comprising an antenna.

The invention also relates to a device (30) for recording topography, which comprises at least three nails (10) and a georeferencing device (36) comprising: a first communication means (361) using an RFID protocol, for receiving the radiofrequency signal comprising the unique identifier and the position data of each nail; and a triangulation means (363) configured to calculate the position of the georeferencing device with respect to the position of the three nails.

The invention relates to a network of communicating survey nails (10) that each comprise an active radiofrequency identification beacon, comprising: a stand-alone electrical power source for powering a transmitter and a storage means; the storage means for storing a unique identifier and nail position data; the transmitter of a radiofrequency signal compliant with an RFID protocol comprising said unique identifier and said nail position data, the transmitter comprising an antenna.

The invention also relates to a device (30) for recording topography, which comprises at least three nails (10) and a georeferencing device (36) comprising: a first communication means (361) using an RFID protocol, for receiving the radiofrequency signal comprising the unique identifier and the position data of each nail; and a triangulation means (363) configured to calculate the position of the georeferencing device with respect to the position of the three nails.

When deploying or upgrading an enhanced cellular communication system, a site survey may be performed by configuring cellular devices in a given area to report various operational metrics. The devices may also be configured to report environmental data that can be used to determine whether the devices are indoors or outdoors, which may be useful when interpreting the operational metrics. The environmental signatures may include an audio signature, which may comprise an audio impulse response produced by an acoustic echo canceller (AEC) of the device. The environmental signatures may further include a light signature, which may be based on frequency components of ambient light. The environmental signatures may further include an audio signature, which may be based on characteristics of radio signals received by the device. Machine learning techniques may be used, with the environmental signatures as features, to predict whether a given device is indoors or outdoors.

When deploying or upgrading an enhanced cellular communication system, a site survey may be performed by configuring cellular devices in a given area to report various operational metrics. The devices may also be configured to report environmental data that can be used to determine whether the devices are indoors or outdoors, which may be useful when interpreting the operational metrics. The environmental signatures may include an audio signature, which may comprise an audio impulse response produced by an acoustic echo canceller (AEC) of the device. The environmental signatures may further include a light signature, which may be based on frequency components of ambient light. The environmental signatures may further include an audio signature, which may be based on characteristics of radio signals received by the device. Machine learning techniques may be used, with the environmental signatures as features, to predict whether a given device is indoors or outdoors.

An RF position tracking system for wirelessly tracking the three-dimensional position of a tracked object. The tracked object has at least one mobile antenna and at least one inertial sensor. The system uses a plurality of base antennas which communicate with the mobile antenna using radio signals. The tracked object also incorporates the inertial sensor to improve position stability by allowing the system to compare position data from radio signals to data provided by the inertial sensor.

An object is to estimate the course of a movable terminal device. An information processing system (S) includes a plurality of transmission devices (1a, 1b) capable of transmitting predetermined radio waves, a terminal device (2) capable of receiving the predetermined radio waves, and a management device (3) communicably connected to the terminal device. The terminal device (2) measures intensities of radio waves received from the transmission devices (1a, 1b) at predetermined times, and transmits measurement results to the management device (3). The management device (3) calculates distances between the terminal device (2) and each of the transmission devices (1a, 1b) at the predetermined times from the measurement results, and calculates positions of the terminal device (2) at the predetermined times from the calculated distances.

A beacon network includes a plurality of beacons arranged at predetermined positions to periodically or intermittently emit a signal wave including identification information, and a radio wave absorber to adjust an emission angle of the signal wave emitted from at least one of the plurality of beacons.