Examples provide a method for clock calibration. A wireless communication device includes a first clock and a second clock. The first clock is turned off but the second clock runs during the inactive state of the wireless communication device. A frequency offset of the first clock is measured with respect to a reference frequency based on a signal received from a network. A virtual timer, which is a software-based timer is updated based on the frequency offset. A drift of the second clock is measured over a predetermined time interval based on the virtual timer. The virtual timer is restored based on the drift after wake-up from the inactive state. Alternatively, a clock frequency relation between the first clock and the second clock may be measured and a phase locked loop (PLL) may be controlled based on the measured clock frequency relation.

This application provides an example timing advance update method, an example terminal, and an example base station. One example method includes receiving, by a terminal, an updated timing advance TA value and a beam cell identity of a beam cell in which the terminal is located that are sent by a base station. The example method also includes obtaining, by the terminal, corresponding TA compensation information based on the beam cell identity. The example method further includes performing, by the terminal, TA compensation in a TA update period based on the updated TA value and the TA compensation information. The example method also includes sending, by the terminal, uplink data by using a TA value obtained after TA compensation is performed.

A method for clock synchronization in a communication system having first circuitry coupled to a first communication channel and second circuitry, includes generating a first timing synchronization parameter, and synchronizing the second circuitry to a second communication channel using the first timing synchronization parameter.

A method for synchronizing a first device and a second device, the first device and the second device being connectable via a wireless link. The method comprises generating (202), at the first device, a synchronization signal comprising a sequence of signals, wherein each of the signals in the sequence has a first frequency; transmitting (204) the sequence of signals from the first device to the second device; performing (206), at the second device, signal processing of the sequence of signals to determine relative phase information of each of the signals in the sequence; and synchronizing (208), based on the determined relative phase information, the first device and the second device by correcting phase offset of subsequent individual signals transmitted from the first device to the second device.

Various embodiments of the present disclosure provide methods and apparatuses for asymmetric carrier bandwidth design. The method implemented at a network node comprising determining a message comprising a delta carrier center frequency shift parameter. The method implemented at a network node further comprises transmitting the message to at least one terminal device.

A wireless communications and imaging system is described. The system includes a receiver and a transmitter. The receiver includes a synchronized array of clocks, wherein a speed of time measured by each one of the clocks in the synchronized array of clocks relative to the other clocks is tracked. The transmitter includes a constellation of masses. A relative position of individual ones of the masses of the constellation of masses (with respect to one another) encodes digital data that is sensed by the receiver in the form of a gravity field change that causes a difference in the speed of clocks measured and utilized by the quantifiable receiver which clock speed differential corresponds to and enables the replication of the original digital data set that was input into the transmitter.

A user equipment (UE) is configured to calibrate a receiver during operation in a wireless network. The UE comprises a radio transceiver configured to communicate with the wireless network; and processing circuitry operatively associated with the radio transceiver. The transceiver is arranged to receive a first reference signal associated with a first reception condition, receive a second reference signal associated with a second reception condition, and then either receive a third reference signal, when the processing circuitry determines that the conditions of the first and second reception conditions differ above a first threshold, and receive a message with receiver settings based on reception conditions of the third reference signal, or receive the message with a receiver setting based on receiver conditions of any one of the first and the second reference signals, when the processing circuitry determines that the conditions of the first and second reception conditions differ below the first threshold, enabling omitting reception of the third reference signal. A method and computer program are also disclosed.

Methods and systems for managing data transmissions are disclosed. An example method can comprise determining a plurality of time allocations for a time cycle. The plurality of time allocations can comprise a first time allocation which can be determined based on an information rate, a committed information rate, an excess information rate, an effective bandwidth rate, other factors, or a combination thereof. Data can be received from multiple sources into a buffer, for example, and can be processed within a time cycle if processing the data will not exceed the time allocation.

Methods, systems, and devices for wireless communications are described. A wireless device may monitor for a transmission of a synchronization signal block that includes a first portion generated using a first waveform type and a second portion using a second waveform type that is different than the first waveform type. The wireless device may detect the first portion of the synchronization signal block based on the first waveform type used for the first portion. After detecting the first portion of the synchronization signal block, the wireless device may process the second portion of the synchronization signal block based on information obtained from the first portion of the synchronization signal block. The information obtained from the first portion of the synchronization signal block may include timing information, frequency information, or both.

A radio-transmitting device comprises a radio interface operating in a predetermined frequency band, operatively arranged for modulating a carrier having a frequency in the frequency band, while switching the frequency of the carrier among several hopping frequencies in the frequency band, according to a hopping sequence, to obtain a spread-spectrum modulated signal, wherein the spread-spectrum modulated signal includes, in a preamble portion, a plurality of sync words, each combined with at least one instance of a sequential index, the sync words being transmitted at different frequencies, and a data portion following the preamble portion and including a plurality of frequency hops.