Aspects of the disclosure relate to a controllable reflective surface (e.g., reconfigurable intelligent surfaces (RIS)) that reflects in multiple directions simultaneously. The controllable reflective surface may include an array of reflecting elements, each reflecting element comprising a radiating component and a phase-shifting component. The array of reflecting elements may be configured to receive control signal sets, where each control signal set configures the array of reflecting elements into a reflecting configuration having a plurality of subsets of the reflecting elements. Here, each subset of the plurality of subsets is configured to reflect radio frequency (RF) signals in a respective direction different from other ones of the first plurality of subsets. The reflecting configuration may define, for example, a block-wise configuration, and interlaced configuration, or a hybrid configuration of the plurality of subsets. Other aspects, embodiments, and features are also claimed and described.

Methods, systems, and devices for wireless communications are described. A user equipment (UE) may receive a configuration for a transmission configuration state for receiving downlink channel transmissions from a base station via a configurable surface. The transmission configuration state may indicate a quasi-co-location source associated with transmission via the configurable surface. The UE may receive a downlink channel transmission via the configurable surface based on the transmission configuration state and the quasi-co-location source. The UE may be capable of determining whether the transmission configuration state conflicts with the quasi-co-location source indicated by the transmission configuration state. The UE may transmit an indication to the base station that the configuration for the transmission configuration state conflicts with the quasi-co-location source. The indication may include a beam failure indication or a measurement report. The UE may fall back to a transmission configuration state previously activated at the UE.

The invention proposes a system and method for determining and controlling a reconfigurable relay device (e.g., a reconfigurable intelligent surface, RIS, or a smart repeater), wherein the reconfigurable relay device is registered and a wireless communication path is established from a network (e.g. access device) via the reconfigurable relay device to a terminal device. The network registers the reconfigurable relay device and determines parameters needed for its control. The control may be achieved by validated and accepted commands and queries. A relay state of the relay device may be set so that a beam for the wireless communication path is correctly redirected at the terminal device.

Certain aspects of the present disclosure relate to wireless communications, and more particularly, to techniques for reconfigurable intelligent surface (RIS) communication. A method that may be performed by a network entity includes determining a subset of RISs controlled by the network entity to be activated or deactivated and transmitting, to each RIS of the subset of RISs, signaling activating or deactivating the subset of RISs in accordance with the determination. In response to receiving such signaling, each RIS of the subset of RISs may activate or deactivate in accordance with the signaling.

Apparatuses, methods, and systems are disclosed for configuration corresponding to a reconfigurable intelligent surface controller. One method includes providing a capability report to a location management function. The capability report corresponds to reconfigurable intelligent surfaces used for positioning. The method includes transmitting control information to a reconfigurable intelligent surface controller for reflecting a positioning reference signal received from a transmitting device and directed to a receiving device. The method includes transmitting a multi-port positioning reference signal configuration to the receiving device. The method includes transmitting, to the receiving device, information indicating to report measurements corresponding to multi-port positioning reference signals reflected from multiple reconfigurable intelligent surfaces.

A wireless communication method of the present disclosure is a wireless communication method in which dual connectivity between a plurality of transmission points and user terminals is used. In the wireless communication method of the present disclosure, a radio link is generated using at least one dynamic reflector between each of a plurality of transmission points and a user terminal. Also, in the wireless communication method of the present disclosure, different data streams are transmitted from the plurality of transmission points to the user terminal via at least one dynamic reflector.

Reconfigurable intelligent surfaces (RISs) are an emerging transmission technology to aid wireless communication. However, the potential of using RIS to mitigate directed energy weapons (DEW) is not widely recognized. Described herein are RIS (based on spiral antenna elements) to aid the mitigation of high-energy radio-frequency (RF) sources applied to a DEW. For example, integrating a broadband circularly-polarized antenna system with RIS technology can successfully mitigate DEW attacks across a wide range of frequencies regardless of how radio waves are polarized. A spiral antenna is simulated that operates between 1.3 GHz and 7 GHz with a 3-dB axial ratio bandwidth (ARBW) covering 2 GHz-7 GHz. Full-wave simulation results show the potential promising application of RIS for the mitigation of DEW attacks.

Methods, apparatuses, and computer-readable medium for configuring a reconfigurable intelligent surface (RIS) are provided. An example method may include receiving, from a second wireless device through a RIS, a set of reference signals (RSs) mapped to a set of single port resources, the set of single port resources being quasi-co-located (QCLed) and time division multiplexed (TDMed). The example method may further include transmitting, to the second wireless device through the RIS, a set of measurement results based on the set of RSs, the set of measurement results being mapped to a set of surface configurations of the RIS.

Methods, systems, and devices for wireless communications are described. For instance, a base station may transmit, to a user equipment (UE), control signaling indicating a configuration for transmitting a reference signal for reconfigurable surface configuration. The base station may receive, via a reconfigurable surface, the reference signal based on transmitting the control signaling. For instance, the reconfigurable surface may reflect the reference signal to the base station using a first configuration of the reconfigurable surface. The base station may transmit, to a controller of the reconfigurable surface, a set of parameters for configuring the reconfigurable surface to a second configuration for communications between the base station and the UE based on receiving the reference signal via the reconfigurable surface.

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may perform measurements of a first plurality of interference measurement resources on a channel from a reconfigurable intelligent surface (RIS) to the UE. The first plurality of interference measurement resources are associated with a plurality of beams. Accordingly, the UE may transmit a first report based at least in part on the measurements of the first plurality of interference measurement resources. The UE may additionally perform measurements of a second plurality of interference measurement resources on the channel from the RIS to the UE. The second plurality of interference measurement resources are associated with a plurality of phases. Accordingly, the UE may transmit a second report based at least in part on the measurements of the second plurality of interference measurement resources. Numerous other aspects are described.