To determine a location of a client device in a wireless network having at least first and second network devices, with known locations, one of the network devices transmits a message to the other network device and the other network device responds with an acknowledgement message. A client device receives the message and the acknowledgement message as well as respective times indicating actual times at which the message and the acknowledgement message were processed by one of the first and second network devices. The client device determines its location based on the times at which it received the message and the acknowledgement message and the difference between the actual processing times. This location may be refined by determining an angle between the client device and at least one of the network devices having multiple antennas and being configured for steered beam communications.

Systems and methods for determining an accurate location of a signal's source of transmission. The methods involve: demodulating a detected carrier signal modulated with a Pseudo Noise (“PN”) code sequence to obtain an original information-bearing signal therefrom; computing time delay offsets using correlations of PN code windows for each symbol of the original information-bearing signal; determining a high accuracy Time Of Arrival (“TOA”) of the detected carrier signal using the time delay offsets; and using the high accuracy TOA to determine an accurate location of the original information-bearing signal's source of transmission.

A navigation satellite system includes a transmitter that transmits a first radio wave having a predetermined frequency, and an electronic device that calculates position coordinates of the electronic device by using a second radio wave from a GNSS satellite, and obtains position coordinates of the transmitter. The electronic device includes a receiver that receives the first radio wave from the transmitter and the second radio wave from the GNSS satellite, and a controller that calculates a distance between the electronic device and the transmitter based on the received first radio wave, and calculates position coordinates of the electronic device based on the received second radio wave. The controller calculates, based on second radio wave received when the electronic device is present at each one of three or more points, respective position coordinates of the three or more points, and calculates respective distances between the electronic device and the transmitter when the electronic device is present at each one of the three or more points. The controller calculates the position coordinates of the transmitter based on the position coordinates of the three or more points and respective distances between each one of the three or more points and the transmitter.

A navigation satellite system includes a transmitter that transmits a first radio wave having a predetermined frequency, and an electronic device that calculates position coordinates of the electronic device by using a second radio wave from a GNSS satellite, and obtains position coordinates of the transmitter. The electronic device includes a receiver that receives the first radio wave from the transmitter and the second radio wave from the GNSS satellite, and a controller that calculates a distance between the electronic device and the transmitter based on the received first radio wave, and calculates position coordinates of the electronic device based on the received second radio wave. The controller calculates, based on second radio wave received when the electronic device is present at each one of three or more points, respective position coordinates of the three or more points, and calculates respective distances between the electronic device and the transmitter when the electronic device is present at each one of the three or more points. The controller calculates the position coordinates of the transmitter based on the position coordinates of the three or more points and respective distances between each one of the three or more points and the transmitter.

Methods and apparatus for improving a procedure based upon wireless determination of a location of agents and equipment during a procedure and quantifying conditions in an environment via automated sensors. The present invention provides apparatus and methods for wireless designation of a position of agents and equipment relative to each other based upon wireless communications amongst multiple wireless transceivers combined with ongoing monitoring of conditions present in a facility. The transceivers may be portions of nodes, and nodes may form self-verifying arrays. A user interface may provide an augmented reality view of positions of all or some the providers and equipment and condition quantifying sensors.

A location information server includes: an acquisition unit configured to acquire received signal strengths of radio signals transmitted from a transmitter and received at a receiver; an estimation unit configured to estimate a location of the transmitter or receiver, using at least the top three received signal strengths among the acquired received signal strengths; and a reliability calculation unit configured to calculate a reliability of the location estimation based on the received signal strengths that have been used.

Methods and apparatus are disclosed for sharing assistance information relating to an uplink signal transmitted by a first User Equipment. The assistance information may be used to assist a wireless communication device to intercept the uplink signal and measure its time of arrival. The assistance information may be used to assist in the calculation of a position or time, based on the measured time of arrival.

A control system includes a communications unit, an acquisition unit, and an output unit. The communications unit communicates with a transmitter that transmits a wireless signal. The acquisition unit acquires location information about a location of the transmitter based on the wireless signal that has been transmitted from the transmitter and received by the communications unit. The output unit has an instruction signal including adjustment information transmitted, in accordance with the location information acquired by the acquisition unit, from the communications unit to the transmitter. The adjustment information is used to vary at least one of a time interval at which the transmitter transmits the wireless signal or transmission power with which the transmitter transmits the wireless signal.

A control system includes a communications unit, an acquisition unit, and an output unit. The communications unit communicates with a transmitter that transmits a wireless signal. The acquisition unit acquires location information about a location of the transmitter based on the wireless signal that has been transmitted from the transmitter and received by the communications unit. The output unit has an instruction signal including adjustment information transmitted, in accordance with the location information acquired by the acquisition unit, from the communications unit to the transmitter. The adjustment information is used to vary at least one of a time interval at which the transmitter transmits the wireless signal or transmission power with which the transmitter transmits the wireless signal.

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.