A method for establishing and controlling a mobile perimeter and for determining a geographic location of an emitting radio frequency (RF) emitter in a vicinity of the mobile perimeter includes at each of a plurality of RF sensors, receiving an RF transmission, processing the received RF transmission to produce RF signal data, and wirelessly transmitting the RF signal data to a central station. At the central station, a processor: executes a cross-correlation process to: compare characteristics of pairs of RF signal data; based on the compared characteristics, determine a time difference of arrival (TDOA) between RF transmissions received at each RF sensor of a pair of RF sensors, and repeats the cross-correlation process for each pair of RF sensors from which RF signal data are received. Using the TDOA values for two or more pairs of RF sensors, the processor determines a location estimate for the RF emitter.

A method of detecting abnormality in an unmanned aircraft control system that allows an unmanned aircraft including a first transceiver and a first directional antenna, and a ground facility including a second transceiver and a second directional antenna, to transmit and receive a signal to and from each other, the method including: calculating an inter-antenna distance from the first directional antenna to the second directional antenna; calculating respective transmission performances of the first directional antenna and the second directional antenna; calculating respective reception performances of the first directional antenna and the second directional antenna; estimating a reception level of a radio wave at each of the first transceiver and the second transceiver; and determining occurrence of abnormality in each of the first transceiver and the second transceiver when a difference between the estimated reception level and an actual reception level is equal to or greater than a predetermined value.

A material coating system for an apparatus having a housing configured to contain a fluid is disclosed herein. A multi-layer coating is applied to the housing to mitigate damage caused by external factors. The multi-layer coating includes: a layer of a primer coating having anti-corrosive properties, a layer of a mid coating having mechanical and chemical properties capable of at least partially closing a hole in the housing to avoid fluid leakage and optionally a layer of a top coating having properties that resist ultraviolet radiation from passing therethrough.

Remote monitoring of an area with a remote sensing device (100, 200, 300) encased in a rubber ball (302) is provided. A remote sensing device (100, 200, 300) is provided which receives a spoken description of a location of the remote sensing device and stores the spoken description as predetermined location information. The description can be received directly prior to deployment or wirelessly transmitted from another device (400). The remote sensing device can sense information related to its environment via a motion sensor (314), such as whether an intruder is located within a vicinity of the remote sensing device (100, 200, 300). The remote sensing device (100, 200, 300) can then transmit the predetermined location information and the environment information to the another device (400) in response to the sensing. In response to receipt, the other device (400) can render the predetermined location information and the environment information in an audible format.

The present description relates to a frequency-based wake-up device and a sensor communication device using such the same. The present invention comprises: a RF signal to voltage converter for receiving a wireless signal including a first signal and a second signal and converting the frequency of the preamble to voltage to generate a driving voltage and provide the same; a decoder activated by the driving voltage and extracts ID information of the sensor communication device by decoding the second signal; and a signal processor that is activated by the driving voltage and compares the extracted ID information of the sensor communication device by the decoder with pre-stored ID information of a pre-determined sensor communication device and notifies of reception of a wake-up signal when the extracted ID information and the pre-stored ID information are the same.

Methods and techniques are described for supporting location services for a user equipment (UE) in a Fifth Generation wireless network in which a base station, such as a gNB or ng-eNB, broadcasts a Positioning Reference Signal (PRS) in a plurality of different directions and at a plurality of different times. A PRS muting configuration is used in which PRS is muted using a time based and angle based pattern to prevent interference between beams transmitted by other base stations and/or to prevent interference between beams transmitted simultaneously by a single base station. The time based and angle based muting pattern, for example, may provide an indication for each direction in the plurality of different directions and for each time in the plurality of different times and as to whether the PRS is transmitted or muted by the base station.

Method and apparatus for receiving an estimate of time in a satellite signal receiver receives an estimate of time from a server and compensates for error of a clock in the satellite signal receiver using the estimate of time. The output of the compensated clock is used when computing a position of the satellite signal receiver. The estimate of time is received using a network time protocol (NTP), a simple network time protocol (SNTP), or by one-way broadcast from the server.

An improved technique for the estimation of the location of a wireless terminal. A disclosed location engine is capable of utilizing a service set identifier (SSID) or a media access control (MAC) address, or both, received from a reporting wireless terminal, in order to improve the estimate of the wireless terminal's location. The location engine generates a first hypothesis for the location of the wireless terminal based on evidence of the location of the wireless terminal, such signal strength measurements, wherein the evidence is independent of the SSID and MAC addresses. The location engine also generates a second hypothesis for the location based on the SSID or a third hypothesis for the location based on the MAC address, or both. An estimate of location of the wireless terminal is based on a combination of the first, second, and third hypotheses. The estimate can then be used in a location-based application.

A method for monitoring vehicle motion using a mobile device associated with a user including collecting activity data at a mobile device associated with the user; determining a user activity state based on the activity data; determining motion data collection parameters associated with an operating state of the mobile device, based on the user activity state; and collecting motion data at the mobile device based on the motion data collection parameters.

Embodiments of the present disclosure describe methods, apparatuses, storage media, and systems for delivering UE capability indication to a positioning server in a wireless communication network. A user equipment (UE) or access note (AN) may notify a positioning server of UE capability information associated with positioning measurements so that the positioning server may determine corresponding positioning measurement configurations based on acknowledgement of such UE capability information in terms of the positioning measurement. Embodiments describe UE capability indications to a positioning server that may enable flexible deployment and integration of various types of UEs. Other embodiments may be described and claimed.