Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a base station (BS) may configure, before transmitting a physical downlink shared channel communication, a first resource and a second resource. The BS may transmit the physical downlink shared channel communication using the first resource. The BS may selectively use, after transmitting the physical downlink shared channel communication, the second resource for the reference signal transmission for subband selection and beam selection based at least in part on whether a retransmission event is detected. Numerous other aspects are provided.

Described is an apparatus of a User Equipment (UE) operable to communicate with a fifth-generation Evolved Node-B (gNB) on a wireless network. The apparatus may comprise a first circuitry and a second circuitry. The first circuitry may be operable to process a Tracking Reference Signal (TRS) transmission and to process a Synchronization Signal block (SS-block) transmission. The second circuitry may be operable to measure a reference signal parameter based on the TRS transmission and the SS-block transmission.

The present disclosure describes systems and methods for selecting modulation and coding schemes (MCS) per-sub-band, and in some examples, per-stream. In some examples, channel condition metrics regarding wireless communication conditions from a communication node of a wireless access system may be received. Based at least on the received channel condition metrics, a modulation and coding scheme may be selected. In some examples, the selected modulation and coding scheme may be transmitted to various modulators/demodulators, encoders/decoders, and/or other communication nodes within the wireless access system.

Certain aspects of the present disclosure provide techniques for beam failure detection in a second band based on measurements in a first band. A method that may be performed by a user equipment (UE) includes receiving one or more reference signals (RSs) on a first radio frequency band and initiating a beam failure recovery on a second radio frequency band based, at least in part, on the one or more RSs on the first radio frequency band. The UE may measure the one or more RSs on the first radio frequency band and perform beam failure detection (BFD) for the second radio frequency band based, at least in part, on one or more measurements of the one or more RSs on the first radio frequency band.

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive a medium access control (MAC) command element (CE) indicating an update to a spatial relation configuration of the UE for physical uplink control channel (PUCCH) transmissions, the update indicated by PUCCH resource information. The UE may update the spatial relation configuration of the UE with the PUCCH resource information. The UE may transmit a PUCCH transmission using the spatial relation configuration. Numerous other aspects are provided.

This disclosure provides methods, devices and systems for soliciting trigger-based (TB) physical layer protocol convergence protocol (PLCP) protocol data units (PPDUs). Some implementations more specifically relate to trigger frame and PPDU designs that support RU downsizing. For example, an access point (AP) may transmit a trigger frame soliciting a TB PPDU from a wireless station (STA). In some aspects, the trigger frame may carry RU allocation information indicating the allocated RU or MRU (associated with a wireless medium) and downsizing information indicating whether downsizing of the RU or MRU is permitted. If interference is detected in a portion of the wireless medium, and downsizing is permitted, the STA may transmit the TB PPDU on a downsized RU or MRU. The downsized RU or MRU includes a subset of the tones in the RU or MRU allocated by the trigger frame.

A method for controlling bandwidth part (BWP) allocation for a plurality of wireless communication devices (WCDs) is disclosed. The WCDs are organized in one or more multiple-input multiple-output (MIMO) groups, wherein each MIMO group comprises WCDs with a current BWP allocation that falls within a BWP region associated with the MIMO group. The method comprises selecting one of the plurality of WCDs as a candidate WCD for MIMO group switch, and determining a first orthogonality metric between the candidate WCD and WCDs of a candidate MIMO group, wherein the candidate WCD is not currently comprised in the candidate MIMO group. When the first orthogonality metric meets a first orthogonality criterion, the method comprises updating the WP allocation for the candidate WCD, wherein the updated BWP allocation for the candidate WCD falls within the BWP region associated with the candidate MIMO group, and performing a MIMO group switch of the candidate WCD from its current MIMO group to the candidate MEM group. Corresponding apparatus, network node and computer program product are also disclosed.

A pilot processing method and a related device are provided. The method includes: receiving feedback information, where the feedback information is feedback information that is sent by a receiving device based on a first pilot received based on a first pilot pattern; and determining, based on the feedback information, whether to update the first pilot pattern.

There is disclosed a method of operating a user equipment, UE, in a radio access network, the UE being configured with UE-specific configuration for transmitting signaling on a physical channel, the UE further having a general configuration for transmitting signaling on the physical channel, wherein the method includes transmitting signaling on the physical channel based on the general configuration ignoring the UE-specific configuration. The disclosure also pertains to related methods and devices.

A communication device is described comprising a first transceiver chain set to communicate signals in a first frequency range, a second transceiver chain set to communicate signals in a second frequency range or set to no communication and a controller, configured to receive an instruction for a resetting of carrier aggregation comprising a setting of the first transceiver chain or the second transceiver chain to receive signals in a third frequency range different from the first frequency range and the second frequency range, to control, in response of the reception of the instruction, the second transceiver chain to receive signals within the first frequency range simultaneously with the first transceiver chain and to control the first transceiver chain, when the communication of signals within the first frequency range by the second transceiver chain fulfills a predetermined criterion, to stop communication of signals within the first frequency range.