A communication method and device, the method including obtaining, by a terminal device, a timing advance (TA), determining, by the terminal device according to a preset rule and first information, whether the TA is valid, where the first information includes a first parameter, and wherein the first parameter is information related to a location of the terminal device, and performing at least one of determining, by the terminal device, in response to the TA being invalid, that uplink data transmission cannot be performed, or determining, by the terminal device, in response to the TA being valid, that the TA can be used for uplink data transmission.

[Object] To provide a mechanism that makes it possible to reduce electric power to be consumed to wait for reception of signals.

[Solution] A communication device comprising a control section configured to perform control in such a manner as to wait for reception of a second signal transmitted from another communication device after a first signal is transmitted to the other communication device.

According to certain embodiments, a method for synchronous control of timing configurations includes operating a wireless device according to a first timing configuration associated with a first delay duration for transmitting feedback to a network node. A second timing configuration associated with a second delay duration for transmitting feedback to the network node is received from the network node. The second delay duration is different from the first delay duration. In response to a first downlink transmission from the network node, a first feedback is scheduled for transmission at a transmission time determined based on the second delay duration associated with the second timing configuration.

A User Equipment (UE) including a wireless transceiver and a controller is provided. The wireless transceiver performs wireless transmission and reception to and from a service network. The controller receives a measurement configuration and a Discontinuous Reception (DRX) configuration from the service network via the wireless transceiver, extends a measurement period indicated by the measurement configuration, and performs a cell measurement via the wireless transceiver in the extended measurement period.

An artificial reality system includes a head-mounted display (HMD) configured to output artificial reality content, wherein the HMD includes a first wireless transceiver to communicate with one or more devices of the artificial reality system; a peripheral device of the one or more devices of the artificial reality system configured to capture media samples for the HMD to output the artificial reality content, wherein the peripheral device includes a second wireless transceiver to communicate with the HMD; a clock manager of the HMD configured to compute a first delta between a timestamp of the HMD and a timestamp of the first wireless transceiver; and a clock manager of the peripheral device configured to compute a second delta between a timestamp of the peripheral device and a timestamp of the second wireless transceiver, wherein the first delta and the second delta are used to adjust a clock of the peripheral device.

An artificial reality system includes a head-mounted display (HMD) configured to output artificial reality content, wherein the HMD includes a first wireless transceiver to communicate with one or more devices of the artificial reality system; a peripheral device of the one or more devices of the artificial reality system configured to capture media samples for the HMD to output the artificial reality content, wherein the peripheral device includes a second wireless transceiver to communicate with the HMD; a clock manager of the HMD configured to compute a first delta between a timestamp of the HMD and a timestamp of the first wireless transceiver; and a clock manager of the peripheral device configured to compute a second delta between a timestamp of the peripheral device and a timestamp of the second wireless transceiver, wherein the first delta and the second delta are used to adjust a clock of the peripheral device.

A first communication device generates a first ranging frame for transmission to a set of second communication devices, and transmitting the first ranging frame during an multi-user (MU) ranging measurement procedure for estimating respective distances between respective second communication devices, among the set of second communication devices, and the first communication device based on measuring times of flight of transmissions between the first communication device and the respective second communication devices. The first communication device then generates a second ranging frame to include timing information corresponding to transmission of the first ranging frame, the timing information indicative of a time of transmission of the first ranging frame by the first communication device. The first communication device transmits the second ranging frame during the MU ranging measurement procedure to second communication devices to permit the second communication devices to synchronize ranging measurement timing with the first communication device.

A wireless fire alarm notification system uses wireless repeater devices to annunciate an alarm to slave devices from the control panel. A notification device provides a local synchronization signal via wire to a secondary notification device. A method enables the activation or deactivation of child device without the child device having to query their parent repeater. A circuit to test the integrity of an active battery charger, a battery, and an isolation circuit is also shown. A method for qualifying that an RF signal meets a specified minimum acceptable level is described. A method for wirelessly sending events to avoid RF link overload is provided. A programming checksum method confirms that an annunciator has latest programming information. A method to automatically process messages from new devices without having to hardcode repeaters to support these new devices is also described.

Embodiments of the present invention provide a base station, a terminal device, and a communication system for inter-base station carrier aggregation. A primary base station of the terminal sends a message including indication information to request the terminal device to report a timing offset between the primary base station and a secondary base station of the UE. The secondary base station calculates a corrected measurement gap information according to a measurement gap information and the timing offset. In a second measurement gap period indicated by the corrected measurement gap information, the terminal device is not scheduled.

A variable delay interface configured to introduce a controllable, variable delay between a radio equipment controller and a radio equipment is provided. The interface includes a variable rate change filter, VRCF, having a signal input, a signal output and a rate control input. The VRCF is configured to receive a rate control signal at the rate control inputs and sample an input signal received at the signal input at a sampling rate controlled by a rate control signal to produce a VRCF output signal. The sampling rate is one of greater than and less than a sampling rate of the input signal. The VRCF has a first delay. The interface includes a first in first out, FIFO, buffer having an input and an output, the FIFO buffer configured to store samples of the VRCF output signal received at the FIFO buffer.