Abstract: The technology relates to a wireless system that can be used indoors or outdoors, and is configured to reduce interference of beacon signals on channels used by the system. Aspects of the technology provide for evaluation of channel activity to determine an optimal transmission channel. This is beneficial where there is a high density of tags that may be configured for data transmission. Tags may include an antenna to receive signals; a set of first conditioning elements to attenuate received signals corresponding with system channels; a set of converters and a set of second conditioning elements to prepare attenuated signals for analysis; a comparator to determine which attenuated signal corresponds to a channel having the lowest power level; and a processor to transmit a beacon signal to a reader apparatus on the channel with the lowest power level.

Abstract: Aspects of the disclosure provide for the use and training of a model configured to provide an estimated time of arrival (ETA) for transporting an object. Data may be received from a reader device. The data may identify a tracking tag and a first timestamp. Based on the received data, a location of the tracking tag at the first timestamp may be determined. A starting location and second timestamp for the tracking tag and a destination location and third timestamp for the tracking tag may be identified. A list including at least one dwell time and dwell location for the tracking tag may be identified. The model may be trained to output the ETA, a dwell time, and a dwell location based on the determined location, the starting location, the destination location, the first timestamp, the second timestamp, the third timestamp, and the list.

Abstract: Aspects of the disclosure provide a method of using a bulk acoustic wave (BAW) based clock. For example, a first burst pulse of ultrasonic waves may be received by a transmit transducer of a BAW delay device. A feedthrough pulse from the first burst pulse may be received at a receive transducer of the BAW delay device. After receiving the feedthrough pulse, a first echo pulse from the first burst pulse may be received at the receive transducer. The first pulse may be a reflection of a portion of the first burst pulse from a substrate. A difference in time between the receipt of the feedthrough pulse and the receipt of the first echo pulse may be used to control timing of a second burst pulse of ultrasonic waves.

Abstract: A method of coordinating beacon signal scanning of reader devices in a tracking system is provided. For instance, first information may be received from a first reader device of the tracking system, and second information may be received from a second reader device, of the tracking system. Based on the first information or the second information that one of the first reader device or the second reader device has moved may be determined. In response to the determination that one of the first reader device or the second reader device has moved, a first coordinated duty cycle for the first reader device and a second coordinated duty cycle for the second reader device may be determined. The first coordinated duty cycle may be provided to the first reader device, and the second coordinated duty cycle may be provided to the second reader device.

Abstract: Aspects of the disclosure provide systems including liner material and tracking tags. A first tracking tag may be at least initially arranged on the liner material. The first tracking tag may also include beacon transmission circuitry including one or more batteries, a top layer, a bottom layer including an adhesive, and an activation mechanism. The activation mechanism may be configured to activate the first tracking tag and cause the beacon transmission circuitry to transmit beacon signals in order to enable tracking of the object. The activation mechanism may further include an initially closed circuit that extends beyond a perimeter of the top layer, and the activation mechanism may be configured to automatically activate the tracking tag when the tracking tag is separated from an adjacent tracking tag on the liner material.

Abstract: Aspects of the disclosure provide systems including linear material and tracking tags. The tracking tag may be at least initially arranged on the liner material. The tracking tag may also include a top layer, beacon transmission circuitry, a bottom layer of adhesive, and an activation mechanism. The activation mechanism may be configured to activate the tracking tag and cause the beacon transmission circuitry to transmit beacon signals in order to enable tracking of the object. The activation mechanism may further include an initially closed circuit, and the activation mechanism may be configured to automatically activate the tracking tag when the tracking tag is removed from the liner material.

Abstract: An electronic device includes a microelectromechanical system (MEMS) rectifier. The MEMS rectifier includes a mainboard and a sub-board. The mainboard has one or more radiofrequency (RF) inputs configured to receive an RF signal, and a first electrical contact. The sub-board is positioned parallel to the mainboard with a gap in-between, and has a thin film piezoelectric layer, a second electrical contact positioned opposite the first electrical contact, and a ground plane. The sub-board is configured to vibrate as the RF signal is received at the one or more RF inputs, and the thin film piezoelectric layer is configured to generate energy due to the vibration and piezoelectric properties of the thin film piezoelectric layer.

Abstract: An intelligent tracking system generally includes one or more tracking devices, some of which may be passive tracking devices. Each passive tracking device includes one or more transceivers and is energized by an energizing signal. Some of these passive tracking devices may operate in a first communication mode or a second communication mode based on the energizing signal. Some tracking devices may include encryption modules or authentication modules. Some of these devices may incorporate a bulk acoustic wave oscillator.