A system and method for quieting unwanted sound. As a non-limiting example, various aspects of this disclosure provide a system and method, for example implemented in a premises-based or home audio system, for quieting unwanted sound at a particular location.

According to one embodiment, a wireless communication device includes a transmitter configured to transmit a first frame including information to specify a plurality of frequency components; and controlling circuitry configured to determine whether a second frame is received via each of the plurality of frequency components. The transmitter is configured to transmit a third frame including first information concerning a first value range which is used to determine whether to respond to the first frame, the first value range being dependent on a number of frequency components via which the second frame has been received.

According to one embodiment, a wireless communication device includes a transmitter configured to transmit a first frame including information to specify a plurality of frequency components; and controlling circuitry configured to determine whether a second frame is received via each of the plurality of frequency components. The transmitter is configured to transmit a third frame including first information concerning a first value range which is used to determine whether to respond to the first frame, the first value range being dependent on a number of frequency components via which the second frame has been received.

An apparatus may be communicatively coupled to other nodes in a network. The apparatus may include a control circuit configured to repeatedly issue transmission cycles to the other nodes. A given transmission cycle may include a least one send slot for each of the other nodes to send data. The control circuit may be configured to initiate transmission cycles by issuing beacon signals to the other nodes. The control circuit may be configured to determine when to issue a beacon signal in a given transmission cycle by determining that all of the other nodes have completed all associated send slots in an immediately previous transmission cycle and based upon a determination of the completion of the other nodes' transmission, delaying transmission of the beacon signal for the given transmission cycle.

An apparatus may be communicatively coupled to other nodes in a network. The apparatus may include a control circuit configured to repeatedly issue transmission cycles to the other nodes. A given transmission cycle may include a least one send slot for each of the other nodes to send data. The control circuit may be configured to initiate transmission cycles by issuing beacon signals to the other nodes. The control circuit may be configured to determine when to issue a beacon signal in a given transmission cycle by determining that all of the other nodes have completed all associated send slots in an immediately previous transmission cycle and based upon a determination of the completion of the other nodes' transmission, delaying transmission of the beacon signal for the given transmission cycle.

An electric system for transmitting serial communication messages with different priorities over a communication link. The data to be transmitted is arranged in serial communication messages comprising a start of packet (SOP) symbol and data symbols. The ongoing transmission of a first message is interrupted if a SOP symbol of a second message is sent before the first message has been completed. Transmission of the first message is continued only after the second message has been sent.

A transceiver device for a bus system. The transceiver device includes first and second bus terminals for connection to first and second signal line of the bus system, and a transmitting unit for outputting a bus transmission signal to the first and second bus terminals. The transceiver device includes an input connection for receiving a transmission input signal useable for controlling an operating state of the transmitting unit, and a detection device, which to detect the presence of a first predefinable condition and, if the first predefinable condition is present, to interconnect the first and second bus terminals via a predefinable electrical resistance for a predefinable first period of time.

Provided are an electronic device that performs ranging by using an ultra wide-band (UWB) communication scheme and an operation method of the electronic device. The operation method of the first electronic device includes transmitting a first ranging control message (RCM) comprising interval information to a second electronic device, determining a first time to transmit a second RCM based on the interval information, determining a first RCM timing window (RTW) based on the first time, transmitting the second RCM to the second electronic device in the first RTW, and transmitting a third RCM at a second time in a second RTW, based on a failure to receive a response message corresponding to the second RCM within a specific time period in the first RTW, wherein the second time is a random time point in the second RTW.

Provided are an electronic device that performs ranging by using an ultra wide-band (UWB) communication scheme and an operation method of the electronic device. The operation method of the first electronic device includes transmitting a first ranging control message (RCM) comprising interval information to a second electronic device, determining a first time to transmit a second RCM based on the interval information, determining a first RCM timing window (RTW) based on the first time, transmitting the second RCM to the second electronic device in the first RTW, and transmitting a third RCM at a second time in a second RTW, based on a failure to receive a response message corresponding to the second RCM within a specific time period in the first RTW, wherein the second time is a random time point in the second RTW.

An in-vehicle relay device according to the present embodiments is an in-vehicle relay device to which first and second communication lines are connected and which relays communication between the first and second communication lines, communication being performed in accordance with first and second communication protocols on the first and second communication lines, respectively, the in-vehicle relay device including: a processing unit that can be switched to a sleep state and a non-sleep state, and that performs processing for relaying communication between the first and second communication lines when in the non-sleep state; and an activation-signal output unit that outputs an activation signal conforming to the second communication protocol to the second communication line if the processing unit is in the sleep state and the activation-signal output unit receives an activation signal conforming to the first communication protocol from the first communication line.