A Bluetooth ranging method includes: A response device establishes a Bluetooth communication connection to a request device; the response device measures signal strength of a ranging request after receiving the ranging request, to obtain a first received signal strength indication RSSI; the response device obtains a first distance based on the first RSSI and a Bluetooth ranging model, where the Bluetooth ranging model is obtained through fitting based on a correspondence between a preset distance from the request device and a modified RSSI at the preset distance, and the modified RSSI is obtained by processing a plurality of RSSIs measured at a plurality of spatial positions when the request device broadcasts a Bluetooth signal, and weights corresponding to the plurality of spatial positions; and the response device sends the first distance to the request device. A distance between devices can be accurately measured using the disclosed techniques.

A method for recommending an installation position of a base station, a storage medium, a mower, and a mobile electronic device are provided. The method acquires satellite observation data at a plurality of sampling points along a boundary of a target map; determining target sampling points satisfying a preset condition according to satellite observation data at each sampling point; determining common satellite observation frequency bands according to satellite observation data at the target sampling points; determining the number of the common satellite observation frequency bands at each sampling point according to the common satellite observation frequency bands and the satellite observation data at each sampling point; and determining recommendation information of the installation position of the base station according to the number of the common satellite observation frequency bands at each sampling point.

The present invention relates to a novel radio propagation path loss calculation method considering environmental factors comprehensively, including building, road, foliage, pedestrians, etc. In an example, the path loss calculation method includes the steps of segmenting the scenario of interest into several regions, assigning each region with a path loss exponent, generating straight-line path information between the Tx region and the Rx region, calculating the path loss by accumulating the weighted path loss of each region in the straight-line path and updating the environmental factor-related path loss exponent using measurement data. A major contribution of this invention is the introduction of the path loss exponent related to each environmental factor, which enables a fast and accurate path loss calculation.

Aspects presented herein may enable a UE to calibrate its radio frequency (RF) sensor(s) using an optical sensor or a calibrated RF sensor. In one aspect, a first UE estimates a first distance between the first UE and a second UE using at least one of an optical sensor or a calibrated RF-based ranging mechanism. The first UE estimates a second distance between the first UE and the second UE using a non-calibrated RF-based ranging mechanism. The first UE computes an offset that indicates a difference between the estimated first distance and the estimated second distance, where the offset is associated with the non-calibrated RF-based ranging mechanism between the first UE and the second UE. The first UE outputs an indication of the offset that indicates the difference between the estimated first distance and the estimated second distance.

The present disclosure generally relates to a method and a measurement system for characterizing a reconfigurable intelligent surface of a device under test. An incident signal is repeatedly transmitted onto the reconfigurable intelligent surface at an incident angle with respect to the reconfigurable intelligent surface by using a feed antenna. Reflected signals reflected by the reconfigurable intelligent surface are captured by using at least one probe antenna. The reflected signals are captured at different angles of reflection such that a three-dimensional reflection pattern is obtained. A reflected total radiated power for the reconfigurable intelligent surface is determined based on the three-dimensional reflection pattern by using a determination circuit.

A user equipment (UE) may be configured to perform layer 3 measurements on an inter-frequency carrier when configured by a long term evolution (LTE) serving cell or a new radio (NR) Frequency Range 1 (FR1) serving cell. The user equipment may perform reception (Rx) beam sweeping, and determine one or more inter-frequency carrier L3 measurements based on the Rx beam sweeping. The UE may report the one or more inter-frequency carrier L3 measurements to a network node.

Disclosed are techniques for wireless communication. In an aspect, a user equipment (UE) transmits, to a network entity, a capability message indicating one or more coverage holes in a spherical coverage region around the UE, wherein the spherical coverage region is realized with one or more antenna modules of the UE, and wherein each coverage hole indicates a range of angles of the spherical coverage region within which a gain provided by the one or more antenna modules is below a signal strength threshold, and receives, from the network entity, a configuration of one or more reference signal resources to be measured by the one or more antenna modules in at least one coverage hole, wherein a density of the one or more reference signal resources is greater than a density of reference signal resources to be measured within the spherical coverage region outside the one or more coverage holes.

Systems, methods, and apparatus for geolocating a signal emitting device are disclosed. A monitoring array comprises at least four monitoring units. A distance ratio between the at least four monitoring units relative to a midpoint is determined. The at least four monitoring units are operable to scan independently for a signal of interest. The at least four monitoring units are operable to calculate times of arrival and angles of arrival for the signal of interest. Each of the at least four monitoring units is operable to measure the signal of interest and transmit a formatted message to other monitoring units within the monitoring array. Each of the at least four monitoring units is operable to determine a location of the signal emitting device from which the signal of interest is emitted based on calculations and measurements relating to the signal of interest.

The present invention relates to a satellite Internet on things (IoT) system, an air communication node, and a data processing method in a satellite IoT system. The IoT system according to an aspect of the present invention includes a plurality of IoT terminals transmitting pilot data and sensor data, an air communication node including a first edge server, receiving an echo signal for the pilot data, estimating terrestrial-air channel state information based on the echo signal, collecting sensor data based on the estimated channel state information, and classifying the collected sensor data into processable sensor data and unprocessable sensor data, and a satellite including a second edge server, processing the unprocessable sensor data offloaded from the air communication node, and transmitting the processed data to the air communication node.