Abstract: Methods, systems, and devices for wireless communications are described. Structures such as buildings or vehicles may include transmissive surfaces (TSs) on glass surfaces that allow penetration of radio frequency signals through the glass surface. A user equipment (UE) within such a structure may communicate with a network entity outside of the structure via beams that are refracted through such TSs. In some examples, different TSs, and thus different sets of beams, may be used for uplink and downlink communications involving a UE and a network entity. Accordingly, a UE may receive downlink messages via a first set of beams and a first TS and may transmit uplink messages via a second set of beams and a second TS. In some examples, such decoupling of uplink and downlink beams in association with the use of different TSs may be based on satisfaction of a triggering condition.

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a reconfigurable intelligent surface (RIS) device may receive a partition configuration indication that is associated with configuring a surface of the RIS device that includes multiple surface partitions, the partition configuration indication associated with activating a first subset of the multiple surface partitions, the first subset of the multiple surface partitions being based at least in part on a location of the first subset on the surface, a geometric shape formed by the first subset, and a beam. The RIS may activate the first subset of the multiple surface partitions. The RIS may deactivate a second subset of the multiple surface partitions, each surface partition in the second subset not being included in the first subset. Numerous other aspects are described.

Abstract: This disclosure provides methods, components, devices and systems for signaling for user equipment (UE) antenna subset selection. For example, a UE may select one or more subsets of antenna ports for transmission, reception, or both, in response to receiving control information and one or more downlink reference signals from a network entity. The control information may indicate one or more subsets of network entity antenna ports for the UE to consider for uplink evaluation, downlink evaluation, or a combination thereof. The control information also may indicate one or more conditions of an uplink channel between the UE and the network entity, a calibration adjustment associated with the network entity, or both. The UE may select subsets of antenna ports for each of the indicated subsets of network entity antenna ports using the one or more conditions of the uplink channel and the calibration adjustment.

Abstract: A method for wireless communication at a reconfigurable intelligent surface (RIS) device and related apparatus are provided. In the method, the RIS device receives, from a network entity, a first pattern configuration indicative of a first set of RIS patterns. The first set of RIS patterns includes two or more RIS patterns being adapted based on transition time information for two or more transitions between the two or more RIS patterns, and the transition time information for each transition of the two or more transitions is based on a change between a first RIS pattern and a second RIS pattern and a direction of the change. The RIS device further communicates with a first user equipment (UE) based on the first set of RIS patterns.

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive, from a network node, a configuration of a multi-power-level signal including multiple segments associated with different transmit power levels. The UE may receive, from the network node, the multi-power-level signal in accordance with the configuration. The UE may transmit, to the network node, feedback associated with the multi-power-level signal. Numerous other aspects are described.

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a network node may transmit, to a reconfigurable intelligent surface (RIS) controller associated with an RIS, a configuration for applying an RIS pattern. The network node may receive, from a network element, a measurement report indicating received observations of pilot signals reflected by the RIS in accordance with the RIS pattern. The network node may transmit, to the RIS controller and based at least in part on the measurement report, an indication of one or more of an updated codebook or a phase drift associated with a calibration of the RIS. Numerous other aspects are described.

Abstract: Certain aspects of the present disclosure provide techniques for communication of multi-periodicity synchronization signaling. An example method includes obtaining signaling that includes an indication of a plurality of transmission occasions associated with synchronization signaling, wherein: the synchronization signaling includes a first set of synchronization signals and a second set of synchronization signals, and the indication of the plurality of transmission occasions indicates that the first set of synchronization signals is arranged in time with a first periodicity and indicates that the second set of synchronization signals is arranged in time with a second periodicity different from the first periodicity; obtaining at least one synchronization signal of the synchronization signaling in at least one transmission occasion of the plurality of transmission occasions; and communicating based at least in part on the at least one synchronization signal.

Abstract: Aspects relate to time schedule based parameters. For example, a wireless communication device may receive a message including a parameter set with an associated time schedule. In some aspects the message may indicate a mapping of each of a plurality of time periods of the time schedule with a corresponding subset of the parameter set. For example, a first subset of the parameter set may include one or more parameters to be used for a transmission that is to occur during a first time period of the plurality of time periods. The wireless communication device may thus transmit a transmission based on at least one parameter of the parameter set.

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive configuration information indicating one or more uplink reference signal resource groups associated with an uplink beamforming mode switching capability of the UE. The UE may transmit one or more uplink reference signals based at least in part on the configuration information. The UE may receive feedback based at least in part on transmitting the one or more uplink reference signals. The UE may communicate using a selected uplink beamforming mode that is based at least in part on the feedback. Numerous other aspects are described.

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive channel covariance information associated with a channel between a network node and the UE. The UE may transmit, to the network node, a channel state information report based at least in part on the channel covariance information. Numerous other aspects are described.

Abstract: According to various embodiments, a wireless communication device divides a plurality of transmission beams into one or more groups of transmission beams including at least a first group of transmission beams. The wireless communication device determines a first sensing beam requirement for the first group of transmission beams. The wireless communication device determines a first sensing beam and a first scale factor so that the first sensing beam satisfies the first sensing beam requirement scaled by the first scale factor. The first sensing beam is selected from a set of candidate sensing beams. The wireless communication device performs a first Clear Channel Assessment (CCA) using the first sensing beam and a first energy detection threshold (EDT), the first EDT determined in accordance with the first scale factor.

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a composite surface system may include a transmissive surface (TS) component capable of transmitting a wireless communication signal incident on the TS component, transmitting the wireless communication signal within a transmissive field-of-view (FoV), and configured to limit signal strength loss of one or more radio frequencies of the wireless communication signal. In some aspects, the composite surface system may include a reflective surface (RS) component capable of reflecting the wireless communication signal within a reflective FoV. The RS component may include a non-uniform pattern region associated with controlling a size of the reflective FoV.

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a network node may transmit, to a reconfigurable intelligent surface (RIS), configuration information to configure the RIS to apply a set of RIS patterns associated with one or more calibration codebooks during an RIS calibration procedure. The network node may receive one or more reference signal received power (RSRP) measurement reports associated with one or more pilot signals that are transmitted during the RIS calibration procedure and while the RIS is applying the set of RIS patterns associated with the one or more calibration codebooks. The network node may update a data communication codebook based at least in part on the one or more RSRP measurement reports. Numerous other aspects are described.

Abstract: Methods, systems, and devices for wireless communications are described. Techniques described herein provide for a network entity to determine a beam focusing distance for a reconfigurable intelligent surface (RIS) for a user equipment (UE) located in the near field region of the RIS. The beam focusing distance may be determined using reference signals for different test beam focusing distances within the near field region of the RIS. The test beams may have a same angular direction from the RIS to the UE. The test beams may have a beam focusing distance selected from a set of beam focusing distances within the near field region of the RIS.

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive transmissive surface information via a data marker. The UE may receive a downlink signal via a transmissive surface associated with the transmissive surface information. The UE may transmit a measurement report associated with the downlink signal received via the transmissive surface, wherein the transmissive surface information includes one or more of: a transmissive surface location, attribute information associated with the transmissive surface, one or more synchronization signal block (SSB) parameters, or SSB beam information. Numerous other aspects are described.

Abstract: Methods, systems, and devices for wireless communications are described. A forwarding device (e.g., a reconfigurable intelligent surface (RIS)) may transmit a capability message indicating one or more timing parameters associated with a time duration for the forwarding device to switch a set of forwarding elements from forwarding in a first direction to forwarding in a second direction. The forwarding device may receive, based on the indicated one or more timing parameters, one or more control messages that instructs the forwarding device to forward signal energy in the first direction during a first symbol period and to forward signal energy in the second direction during a second symbol period. The first symbol period may be different from the second symbol period. The forwarding device may include a primary array including a first set of forwarding elements and a secondary array including a second set of forwarding elements.

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a first network entity may transmit, to a forwarding-capable network entity and at a first time, a first forwarding configuration. The first network entity may transmit, to the forwarding-capable network entity and at a second time, a second forwarding configuration, wherein the transmission is associated with an amount of time between the first time and the second time. Numerous other aspects are described.

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a first wireless communication device may transmit, to a second wireless communication device, coordination information associated with receiving a multi-layer communication from a network node via multiple transmissive surfaces. The first wireless communication device may receive the multi-layer communication from the network node via the multiple transmissive surfaces. Numerous other aspects are described.

Abstract: Aspects described herein relate to configuring one or more reflective elements and a background element of an intermediate wireless device to reflect wireless signals. A first indication for configuring one or more reflective elements on the intermediate wireless device can be received from a network node. The one or more reflective elements can be configured based on the first indication. A second indication for configuring a state of a background element of the intermediate wireless device can be received from the network node. The state of the background element can be configured based on the second indication. Other aspects relate to transmitting the indications to configure the intermediate wireless device.