Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may determine an actual power delay profile (PDP) associated with a channel between the UE and a base station, wherein the actual PDP indicates an averaged power level of the channel over a period of time. The UE may determine whether a channel estimation mode switching event is satisfied. The UE may switch, based at least in part on the channel estimation mode switching event being satisfied, between a first channel estimation mode based at least in part on the actual PDP and a second channel estimation mode based at least in part on a template PDP. Numerous other aspects are described.

Techniques described herein provide phase and amplitude calibration of phased array antennas. In an N-by-M phased array having N*M channels, embodiments use aggregated measurements over multiple concurrently active channels to improve signal-to-leakage performance, while also using sequences of exclusion groups to yield an individualized calibration value for each channel (i.e., N*M individualized calibration values). For example, a J×K channel group of the array is selected in each of a sequence of measurement frames based on a calibration schema. Over J*K measurement sub-frames, a set of J*K aggregate measurements is obtained, each with different subsets of the channel group activated and excluded from the measurement. The aggregate calibration measurements can be used to compute J*K individualized calibration values, each for a channel of the channel group. In some implementations, each calibration value is computed as a complex value including both amplitude and phase calibrations information.

A vehicle includes a human-machine interface (HMI) device, configured to interact with a user; a wireless transceiver; and a controller, configured to responsive to the wireless transceiver detecting a signal strength of a wireless transmission at a predefined frequency exceeding a predefined threshold, output a message via the HMI device to ask a user to switch off a wireless device associated with the user, and responsive to continuing to detect the signal strength of the wireless transmission exceeding the threshold, output an alert, via the HMI device, to inform the user of a vehicle-to-everything (V2X) communication failure and record an identity of the wireless transmission and a location of the vehicle.

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may determine, periodically, at least one metric associated with a current reference signal on a sidelink. Accordingly, the UE may extend a time window allowed for a search for a new reference signal on the sidelink based at least in part on the at least one metric. For example, the UE may extend the time window as a function of a discontinuous reception cycle associated with the UE. Alternatively, the UE may extend the time window for a preconfigured amount of time. Numerous other aspects are described.

A computing device obtains an instance of radio observation data and an associated circumstance parameter. The instance of radio observation data indicates an observed signal strength a radio node observed by a mobile device. The circumstance parameter indicates a characteristic of motion of the mobile device and/or a characteristic of the environment about the mobile device when the instance of radio observation data was captured. The computing device determines a context associated with the instance of radio observation data based at least in part on the circumstance parameter; determining a context-specific signal strength correction based at least in part on the context; generates a corrected signal strength of the radio node based on the observed signal strength and the signal strength correction; and generates and/or updates a radio map based at least in part on the corrected signal strength of the at least one radio node.

A computing device obtains an instance of radio observation data and an associated circumstance parameter. The instance of radio observation data indicates an observed signal strength a radio node observed by a mobile device. The circumstance parameter indicates a characteristic of motion of the mobile device and/or a characteristic of the environment about the mobile device when the instance of radio observation data was captured. The computing device determines a context associated with the instance of radio observation data based at least in part on the circumstance parameter; determining a context-specific signal strength correction based at least in part on the context; generates a corrected signal strength of the radio node based on the observed signal strength and the signal strength correction; and generates and/or updates a radio map based at least in part on the corrected signal strength of the at least one radio node.

The present disclosure relates to a method and device for generating a protocol data unit (PDU) packet. The method includes: acquiring a service data unit (SDU) packet, processing the SDU packet according to a size of a preset data packet, and generating a packet header and a data section of a PDU packet according to the processing result, the packet header and the data section constituting the PDU packet. The packet header omits a framing indication (F) field and a resegmentation flag (RF) field and includes a preset field, and the preset field includes other fields than the FI field and the RF field that are redefined in a common packet header, or a target field that is newly added, a field length of the target field that is newly added being smaller than a total length of the FI field and the RF field.

The present disclosure relates to a method and device for generating a protocol data unit (PDU) packet. The method includes: acquiring a service data unit (SDU) packet, processing the SDU packet according to a size of a preset data packet, and generating a packet header and a data section of a PDU packet according to the processing result, the packet header and the data section constituting the PDU packet. The packet header omits a framing indication (F) field and a resegmentation flag (RF) field and includes a preset field, and the preset field includes other fields than the FI field and the RF field that are redefined in a common packet header, or a target field that is newly added, a field length of the target field that is newly added being smaller than a total length of the FI field and the RF field.

A system that incorporates the subject disclosure may perform, for example, a method for receiving interference information, identifying a plurality of interferers, approximating a location of the plurality of interferers, and adjusting an antenna pattern of an antenna. The method can include determining traffic loads and adjusting the antenna pattern according to the traffic loads. Other embodiments are disclosed.

A system that incorporates the subject disclosure may perform, for example, a method for receiving interference information, identifying a plurality of interferers, approximating a location of the plurality of interferers, and adjusting an antenna pattern of an antenna. The method can include determining traffic loads and adjusting the antenna pattern according to the traffic loads. Other embodiments are disclosed.