In an embodiment, a UE establishes, with a peer sidelink UE, at least one sidelink communications link that each comprises one or more hops. The UE determines estimates a propagation delay between the UE and the peer sidelink UE based in part upon a relationship between a propagation time, between the UE and the peer sidelink UE, and Reference Signal Received Power (RSRP) irrespective of whether the UE remains synchronized with respect to the network clock.

A computer-implemented method for determining the system frame number (SFN) of a radio frame includes receiving a synchronization signal sequence transmitted by a cell in a synchronization signal subframe, determining a physical cell identity (PCID) of the cell based on the synchronization signal sequence, equalizing the synchronization signal sequence using an ideal PCID vector of the determined PCID, partitioning the equalized synchronization signal sequence into multiple segments that include at least one segment overlapping with two other segments of the multiple segments, windowing each segment of the multiple segments, computing power spectra of the multiple windowed segments, determining an averaged power spectrum of the equalized synchronization signal sequence based on the power spectra of the multiple windowed segments, and estimating the SFN associated with the synchronization signal subframe based on a location of a peak signal of the averaged power spectrum of the equalized synchronization signal sequence.

An apparatus for use in a RAN network node includes processing circuitry coupled to a memory. To configure the RAN network node for positioning measurement reporting in a wireless network, the processing circuitry is to decode a measurement request message from a location management function (LMF) node of the wireless network. The processing circuitry also encodes a measurement response message for transmission to the LMF node based on the measurement request message.

A method and a device in a User Equipment and a base station used for wireless communication. The UE receives a target radio signal and transmits first information on a target channel in turn. A channel measurement for the target radio signal is used for triggering the transmission of the first information. The target channel is a first type of physical layer channel or a second type of physical layer channel. If the target channel is the first type of physical layer channel, the transmission of the first information on the target channel is counted into the number of transmission times of the first information. Otherwise, the number of transmission times of the first information is unrelated to the transmission of the first information on the target channel. The present disclosure improves the success rate of retransmission, supports flexible configuration, and saves the transmit power consumption of the UE.

A method of detecting a synchronization switching pulse using a power detector in a time division duplexing (TDD) system includes receiving an input signal, detecting a power level associated with the input signal using a digital power meter, and determining a configuration associated with the input signal. The method also includes determining that a pulse width associated with the input signal is greater than a threshold, determining an offset associated with a special subframe configuration, and generating an estimated sync pulse. The method further includes forming a regenerated sync pulse, determining an error between the estimated sync pulse and the regenerated sync pulse, determining that the error is less than a threshold, and providing a lock detect.

A channel latency determining method, a positioning method, and device, the method including obtaining, by a communications device, device location information of a calibration user equipment (UE), calculating a propagation delay according to the device location information and prestored location information of an antenna, where the propagation delay is a time between transmitting a radio signal by the calibration UE and receiving the radio signal by the antenna, calculating a time of arrival according to the radio signal transmitted by the calibration UE to the antenna, where the time of arrival is a time obtained through calculation according to a time of arrival (TOA) estimation algorithm, and determining a channel latency according to the propagation delay and the time of arrival, where the channel latency is positively correlated with the time of arrival and is negatively correlated with the propagation delay.

A device operates in a cellular communications network by detecting a timing signal from a serving base station, obtaining timing information from at least one other base station, and setting a value for a transmission time offset based on the detected timing signals from the serving base station and the at least one other base station. The device then transmits signals to the serving base station using the set value for the transmission time offset. The device may obtain the timing information from at least one other base station by detecting a timing signal transmitted by the at least one other base station, and subtracting the timing difference between the detected timing signals from the serving base station and the one other base station from a predetermined baseline time offset.

A user equipment apparatus determines whether a transmission is received from a base station within a time window and skips measurement of a reference signal during a subsequent period, when a transmission is received from the base station within the time window. A base station apparatus configures a UE to monitor one or more reference signals associated with a beam pair link and transmits a first signal in a transmission to the UE. The base station determines whether the transmission is received at the UE within a time window and determines whether to transmit a reference signal, based on whether the transmission is received at the UE within the time window. Upon determining that the transmission was received at the UE, the base station may skip transmission of the reference signal or modify a time, a frequency, a power, and/or a reference signal offset for the reference signal.

A UE (22) in handover consideration transmits an uplink measurement signal comprising repetitions of a predetermined identity code. Network access nodes (18, 20) that are candidate handover target nodes receive the signal and use it for channel quality and timing offset measurements. To ensure that a predetermined minimum number of symbols are received without interference from user traffic, an uplink measurement signal reception window is defined for each candidate node (18, 20). The timing of the reception window is based on a total timing misalignment between the UE (22) and the candidate node. In some embodiments, the duration of the reception window is based on an uncertainty in the timing misalignment estimate. Reception of user data is precluded during the uplink measurement signal reception window (on the allocated subband, if the full uplink carrier is not used). The UE transmits the uplink measurement signal in an uplink measurement signal transmission window. In some embodiments, the duration of the transmission window is sufficient to encompass the uplink measurement signal reception windows of all candidate nodes.

Methods, systems, and devices for wireless communications are described. Generally, the described techniques provide for a user equipment (UE) to select a synchronization signal from multiple synchronization signals received at transceiver nodes of the UE based on configured selection rules. The UE may receive control signaling from another UE, a base station, or some other device indicating a rule for selecting between multiple synchronization signals received across transceiver nodes of the UE. The selection rule may indicate signal quality comparison metrics for selecting the synchronization signal, such as reference signal received power (RSRP) metrics, timing metrics, priority metrics, or a combination thereof. The UE may select a synchronization signal for deriving a timing at the UE based on the selection rule. The UE may forward the selected synchronization signal to one or more other UEs by transmitting the selected synchronization signal via each transceiver node at the UE.