An electronic monitoring system and method are provided. The electronic monitoring system monitors communication of data between a device primary radio of a monitoring device and a hub primary radio through a primary communication path. Communication of the data is transferred to a secondary communication path between a device secondary radio of the monitoring device and a hub secondary radio in response to the detection of a disruption on the primary communication path resulting from interference or jamming of communications over the primary communication path. The primary and secondary radios operate a different frequencies.

The technology relates to establishing wireless communication links, or connections, between a first audio accessory device, a second audio accessory device, and a client computing device. After receiving signals from the client computing device to initiate audio output, the first audio accessory device and the second audio accessory device may both perform a series of steps in parallel to establish connections with the client computing device and with each other. The series of steps may include relaying one or more acknowledgement (ACK) signals between the audio accessory devices in order to confirm proper receipt of the signals from the client computing device at both audio accessory devices. Alternatively, the series of steps may include transmitting a jamming signal from one of the audio accessory devices in order to prevent an ACK signal from the other audio accessory device from reaching the client computing device and initiating audio output.

A method for detecting a jamming transmitter affecting a communication user equipment, operating in a cellular network supporting communication in a time-division manner, including at least one active base station, on which the user equipment is camping.

In the method, the user equipment detects that at least one downlink radio channel from the active base station is not decodable, measures signal levels received on said downlink radio channel for a plurality of time units, analyzes said signal level measurements, and in case at least one time unit is detected with a signal level exceeding a predefined threshold, detects a jamming transmitter by verifying that, in a predefined amount of successive time units, the pattern of a first time unit with signal level exceeding the predefined threshold, directly followed by a second time unit with a signal level below the predefined threshold, is not detected.

The invention concerns a vehicle tracking network including a plurality of subscriber vehicles and a control-center; and systems and methods for tracking vehicles, which are subscribers to such vehicle tracking network. In certain implementations, the method for tracking a subscriber vehicle includes the following operations carried out at the subscriber vehicle: monitoring operation of one or more services related to at least one of a wireless network communication service and positioning service associated with the subscriber vehicle; upon detecting a failure in at least one of said services, generating a corresponding distress signal encoded to be identifiable by other subscriber vehicle(s) of the vehicle tracking network; and broadcasting the encoded distress signal such that it is detectable by one or more of the other subscriber vehicles of the vehicle tracking network, which are located in the vicinity of the subscriber vehicle broadcasting the distress signal. Another subscriber vehicle(s), which receive the distress signal, may thereby initiate automatic notification of the condition of the vehicle broadcasting the distress signal to the control center.

The present disclosure relates to preventing laser access to microphones of smart devices. In one embodiment, a microphone of the smart device may be covered with an opaque material such as a cloth cover. The opaque material may serve as a barrier that is impenetrable to light, thereby preventing laser light to reach the microphone. In a further embodiment, a smart device may prevent the one or more microphones of the smart device from receiving an audio command embedded in a light signal by disrupting the light signal, ignoring the audio command, or both. In another embodiment, the smart device may block the audio command from being received at a microphone of a smart device by determining a frequency of the light signal, instructing a laser jammer to transmit a counter light with the frequency to interfere with the light signal.

A method for effecting communications, such as telephone calls, accesses to data network sites, alarm system communications, and/or other communications, over a communications network. The method comprises: determining that an ability of first end-user equipment at a first end-user premise to communicate via a first communication link connecting the first end-user equipment to the communications network is disrupted; establishing a wireless communication link between the first end-user equipment and second end-user equipment at a second end-user premise; and causing information transmitted by or destined for the first end-user equipment to be exchanged over the communications network via the wireless communication link and a second communication link connecting the second end-user equipment to the communications network. Also provided are apparatus and computer-readable media containing a program element executable by a computing system to perform such a method.

The technology relates to establishing wireless communication links, or connections, between a first audio accessory device, a second audio accessory device, and a client computing device. After receiving signals from the client computing device to initiate audio output, the first audio accessory device and the second audio accessory device may both perform a series of steps in parallel to establish connections with the client computing device and with each other. The series of steps may include relaying one or more acknowledgement (ACK) signals between the audio accessory devices in order to confirm proper receipt of the signals from the client computing device at both audio accessory devices. Alternatively, the series of steps may include transmitting a jamming signal from one of the audio accessory devices in order to prevent an ACK signal from the other audio accessory device from reaching the client computing device and initiating audio output.

The technology relates to establishing wireless communication links, or connections, between a first audio accessory device, a second audio accessory device, and a client computing device. After receiving signals from the client computing device to initiate audio output, the first audio accessory device and the second audio accessory device may both perform a series of steps in parallel to establish connections with the client computing device and with each other. The series of steps may include relaying one or more acknowledgement (ACK) signals between the audio accessory devices in order to confirm proper receipt of the signals from the client computing device at both audio accessory devices. Alternatively, the series of steps may include transmitting a jamming signal from one of the audio accessory devices in order to prevent an ACK signal from the other audio accessory device from reaching the client computing device and initiating audio output.

A method for handling of a jamming condition affecting a wireless device operating in normal coverage mode includes: determining a base station supporting enhanced coverage mode, providing signals sufficient for decoding in enhanced coverage mode, receiving enhanced coverage system information from said enhanced coverage base station, storing data relating to received enhanced coverage system information broadcast and/or the enhanced coverage base station,
in case of detection of a jamming condition affecting signals from the current base station: checking ability to decode signals from said enhanced coverage base station indicated by said stored data, in case downlink signals of said enhanced coverage base station are decodable in enhanced coverage, starting operation with said enhanced coverage base station in enhanced coverage mode, and sending a jamming indication message to a remote server accessible via the cellular network by means of said enhanced coverage base station.

A method, a computer program, and a device for reducing interference of temporary communication resources used for a wireless communication between a transportation vehicle key and a transportation vehicle. The method includes determining whether interference of the temporary communication resources is present and switching off the device causing the interference or adjusting the use of the temporary communication resources for the wireless communication between the transportation vehicle key and the transportation vehicle in response to interference being present.