Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a network node may communicate with at least one user equipment (UE), wherein a blocking object is disposed between the network node and the at least one UE, the blocking object comprising at least one transmissive surface configured to refract incident beams. Numerous other aspects are described.

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a reflecting device may generate a multi-peak reflection beam that spatially multiplexes a first reflected signal of a first signal and a second reflected signal of a second signal. The reflecting device may receive the first signal and the second signal. The reflecting device may reflect the first signal and the second signal to output a spatially multiplexed reflected signal using the multi-peak reflection beam. 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: 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), information identifying a RIS configuration, wherein the RIS configuration includes one or more parameters for a time-varying control configuration associated with side-lobe suppression. The network node may communicate, via the RIS and using the RIS configuration, with a user equipment (UE). Numerous other aspects are described.

Abstract: Methods, apparatuses, and computer-readable storage media are provided. An example method includes determining R demodulation reference signal (DMRS) ports for a transmission. R is greater than or equal to 2. The method includes determining N sets of one or more time-frequency domain resources for the transmission. N is greater than or equal to 1. The method includes determining RxN resource units on the R DMRS ports and the N sets of one or more time-frequency domain resources. RxN is greater than or equal to 3. The method includes mapping S complex-valued modulation symbols to the RxN resource units. The mapping is based on certain properties. The method includes transmitting, to an apparatus, the S complex-valued modulation symbols over the RxN resource units on the N sets of time-frequency domain resources based on the mapping and using the R DMRS ports.

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: A method of wireless communication at a first network node is disclosed herein. The method includes performing beam training with a RIS-MT array, wherein the RIS-MT array is associated with a RIS array. The method includes identifying, based on the beam training, a first beam for communication with the RIS-MT array. The method includes transmitting communication to the RIS array for reflection or refraction to a wireless device using a second beam based, at least in part, on the first beam identified for the RIS-MT array.

Abstract: Various implementations described herein are related to a device having a first coil-shaped spiral structure for an active shield and a second coil-shaped spiral structure that is wound in-between windings of the first coil-shaped spiral structure. The first coil-shaped spiral structure may provide for a coil-based electro-magnetic (EM) shield as a counter-measure circuit for protecting an underlying circuit.

Abstract: Methods, systems, and devices for wireless communications are described. A network entity may utilize parameterized codebooks to support reconfigurable intelligent surface (RIS)-assisted communications. For example, a network entity may receive an indication of one or more codebooks associated with respective sets of parameters including one or more of a respective field of view (FOV) or a respective configuration switching latency, among other parameters. The network entity may select a codebook for RIS-assisted communications based on whether the codebook satisfies one or more thresholds. The network entity may indicate the codebook to a RIS controller and may communicate one or more messages with a user equipment (UE) using a RIS in accordance with the indicated codebook.

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: Methods, systems, and devices for wireless communication are described. A reconfigurable reflective surface (RIS) may receive control information from a network entity. The control information may be usable at the RIS for determination of a set of phase parameters. The RIS may determine whether distance information between the network entity and the RIS is available. The RIS may determine the set of phase parameters in accordance with the control information. The set of phase parameters may be usable by the RIS for reflecting communications from the network entity to a user equipment (UE) in accordance with a focusing distance that may be based on the determined availability of the distance information. The RIS may apply the set of phase parameters to reflect a signal from the network entity to the UE.

Abstract: Methods, systems, and devices for wireless communications are described. The described techniques provide for a network entity to indicate a desired beamforming coverage scheme to a controller of a reconfigurable intelligent surface (RIS). The RIS controller may identify one or more realizable multi-lobe beamforming patterns in accordance with the desired beamforming coverage scheme, and may transmit multi-lobe beam information indicating the one or more realizable multi-lobe beamforming patterns to the network entity. In some cases, the RIS may indicate single-lobe beam information to the network entity, and the network entity may transmit one or more vectors to support generating the multi-lobe beam information. In some examples, based on the multi-lobe beam information, the network entity may indicate a multi-lobe beamforming pattern that the RIS is to use for relaying a multi-lobe reflect beam or a multi-lobe incident beam.

Abstract: Certain aspects of the present disclosure provide techniques for a method for wireless communication by a first wireless entity, comprising: receiving signaling from a second network entity to configure reconfigurable intelligent surface (RIS) elements based on a direction of a target incident signal and a direction of a target reflected signal, and configuring the RIS elements based on the direction of the target incident signal and the direction of the target reflected signal and to randomize reflections, based on the signaling.

Abstract: Various implementations described herein are related to a device having a first coil-shaped spiral structure for an active shield and a second coil-shaped spiral structure that is wound in-between windings of the first coil-shaped spiral structure. The first coil-shaped spiral structure may provide for a coil-based electro-magnetic (EM) shield as a counter-measure circuit for protecting an underlying circuit.

Abstract: Certain aspects of the present disclosure provide techniques for a method for wireless communication by a first wireless entity, comprising: receiving signaling from a second network entity to configure reconfigurable intelligent surface (RIS) elements based on a direction of a target incident signal and a direction of a target reflected signal, and configuring the RIS elements based on the direction of the target incident signal and the direction of the target reflected signal and to randomize reflections, based on the signaling.

Abstract: A network device, such as a base station or a RIS, obtains an indication of a characteristic distance associated with a configurable array of reflective elements. The network device provides a communication for a wireless device using a beam focusing configuration of the configurable array of reflective elements with a first focusing distance based on the characteristic distance.

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: The apparatus may be a wireless device, or a component of a wireless device, configured to receive a plurality of reference signal transmissions associated with a corresponding plurality of configurations of a configurable array of reflective elements and to provide, based on the plurality of reference signal transmissions, information indicating an estimated distance from the wireless device to the configurable array of reflective elements. The apparatus may be a RIS, a RIS controller, a base station, or a component of any of the RIS, the RIS controller, or the base station, configured to provide a plurality of reference signal transmissions associated with a corresponding plurality of configurations of a configurable array of reflective elements, and obtain, based on the plurality of reference signal transmissions, information indicating an estimated distance from a wireless device to the configurable array of reflective elements.

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a beam reflecting device may receive target reflection angle information that indicates a target reflection angle range for reflect beams. The beam reflecting device may select one or more reflect beams based at least in part on the target reflection angle information. The beam reflecting device may transmit reflected power angle spectrum information that indicates the one or more reflect beams. Numerous other aspects are described.

Abstract: A network entity (e.g., a base station) may transmit, for a network node (e.g., a RIS), a RIS pattern configuration. The network entity may transmit, for the network node, a diode bias voltage configuration for a plurality of diodes or a plurality of RIS elements of the network node. The diode bias voltage configuration may be associated with the RIS pattern configuration. The network node may forward at least one transmission from a first device to a second device via the network node in one of an uplink, a downlink, or a sidelink based on the RIS pattern configuration and the diode bias voltage configuration.