Base station reporting of user equipment antenna selection

Abstract

Methods, systems, and devices for wireless communication are described. A first wireless device can transmit, to a second wireless device, a first indication of a capability of the first wireless device to selectively configure an activation state of a set of antenna elements of an antenna array of the first wireless device and a parameter value indicating a structure of the antenna array. The first wireless device can then receive, from the second wireless device in response to the transmitted first indication, a second indication for the first wireless device to modify the activation state of one or more antenna elements of the set of antenna elements. The first wireless device can subsequently identify the activation state of the one or more antenna elements based on the received second indication and communicate with the second wireless device using the antenna array in accordance with the identified activation state of the one or more antenna elements.

Description

[0001] Cross-references

[0002] This patent application claims the benefits of U.S. Provisional Patent Application No. 63 / 090,153, filed October 9, 2020, entitled “BASE STATION REPORT OF USER EQUIPMENT ANTENNA SELECTION,” and U.S. Patent Application No. 17 / 496,413, filed October 7, 2021, entitled “BASE STATION REPORT OF USER EQUIPMENT ANTENNA SELECTION,” each of which is assigned to the assignee of this application. Technical Field

[0003] The following pertains to wireless communications, including base station reports on user equipment (UE) antenna selection.

[0004] background

[0005] Wireless communication systems are widely deployed to provide various types of communication content, such as voice, video, packet data, message sending and receiving, broadcasting, and so on. These systems can support communication with multiple users by sharing available system resources (e.g., time, frequency, and power). Examples of such multiple access systems include fourth-generation (4G) systems (such as Long Term Evolution (LTE) systems, LTE-A Advanced (LTE-A) systems, or LTE-A Pro systems) and fifth-generation (5G) systems, which may be referred to as New Radio (NR) systems. These systems can employ various technologies, such as Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), or Discrete Fourier Transform Extended Orthogonal Frequency Division Multiplexing (DFT-S-OFDM). A wireless multiple access communication system may include one or more base stations or one or more network access nodes, each of which simultaneously supports communication from multiple communication devices, which may also be referred to as User Equipment (UE).

[0006] As wireless communication frequencies increase, signal wavelengths decrease, leading to smaller and more closely spaced antenna elements in wireless devices. Smaller antenna elements allow for a greater number of elements to be placed within an antenna array, enabling beamforming and improved beam separation. However, this increase in the number of antenna elements within the array may correspond to a linear increase in power consumption, potentially reducing battery life and the overall user experience.

[0007] Overview

[0008] The described techniques relate to improved methods, systems, devices, and apparatuses that support base station reporting for user equipment (UE) antenna selection. Generally, the described techniques provide signaling between wireless devices (e.g., UEs and base stations) that enables a second wireless device (e.g., a base station) to modify an activation state of antenna elements of a first wireless device (e.g., a UE). For example, a UE can indicate to a base station that the UE is capable of configuring (e.g., modifying, adjusting) an activation state of antenna elements within an antenna array. The UE can also report parameters associated with a structure of the antenna array, such as an arrangement of antenna elements, a size of the antenna array, a number of antenna elements, or any combination thereof. The base station can then instruct the UE to modify an activation state of one or more antenna elements using the determined parameters of the antenna array. In some cases, the base station can additionally determine one or more characteristics of a network, and can instruct the UE to modify the activation state of the antenna elements based on both the determined parameters of the antenna array and the determined characteristics of the network. The network characteristics that can be used to selectively modify the antenna elements can include a location of the UE within the network, an uplink / downlink configuration of the UE within the network, or both. The techniques described herein can enable a wireless device (e.g., a base station, an integrated access and backhaul (IAB) node) to selectively modify an activation state of antenna elements of another wireless device (e.g., a UE, an IAB node) based on a structure of the antenna elements and network characteristics, which can reduce power consumption of the antenna array and reduce interference as compared to other techniques.

[0009] A method of wireless communication is described at a first wireless device. The method can include transmitting, to a second wireless device, a first indication of a capability of the first wireless device to selectively configure an activation state of a set of antenna elements of an antenna array of the first wireless device and one or more parameter values indicative of a structure of the antenna array, the one or more parameter values being associated with one or more characteristics of a beam formable by the antenna array; receiving, from the second wireless device and in response to the transmitted first indication, a second indication for the first wireless device to modify the activation state of one or more antenna elements of the set of antenna elements; identifying the activation state of the one or more antenna elements based on the received second indication; and communicating with the second wireless device using the antenna array in accordance with the identified activation state of the one or more antenna elements.

[0010] An apparatus for wireless communication at a first wireless device is described. The apparatus can include a processor, memory coupled with the processor, and instructions stored in the memory. The instructions can be executable by the processor to cause the device to transmit, to a second wireless device, a first indication of a capability of the first wireless device to selectively configure activation states of a set of antenna elements of an antenna array of the first wireless device and one or more parameter values indicative of a structure of the antenna array, the one or more parameter values being associated with one or more characteristics of beams formable by the antenna array, receive, from the second wireless device and in response to the transmitted first indication, a second indication for the first wireless device to modify the activation states of one or more antenna elements of the set of antenna elements, identify the activation states of the one or more antenna elements based on the received second indication, and communicate with the second wireless device using the antenna array in accordance with the identified activation states of the one or more antenna elements.

[0011] Another apparatus for wireless communication at a first wireless device is described. The apparatus can include means for transmitting, to a second wireless device, a first indication of a capability of the first wireless device to selectively configure activation states of a set of antenna elements of an antenna array of the first wireless device and one or more parameter values indicative of a structure of the antenna array, the one or more parameter values being associated with one or more characteristics of beams formable by the antenna array, receiving, from the second wireless device and in response to the transmitted first indication, a second indication for the first wireless device to modify the activation states of one or more antenna elements of the set of antenna elements, identifying the activation states of the one or more antenna elements based on the received second indication, and communicating with the second wireless device using the antenna array in accordance with the identified activation states of the one or more antenna elements.

[0012] A non-transitory computer-readable medium storing code for wireless communication at a first wireless device is described. The code can include instructions executable by a processor to transmit, to a second wireless device, a first indication of a capability of the first wireless device to selectively configure activation states of a set of antenna elements of an antenna array of the first wireless device and one or more parameter values indicative of a structure of the antenna array, the one or more parameter values being associated with one or more characteristics of beams formable by the antenna array, receive, from the second wireless device and in response to the transmitted first indication, a second indication for the first wireless device to modify the activation states of one or more antenna elements of the set of antenna elements, identify the activation states of the one or more antenna elements based on the received second indication, and communicate with the second wireless device using the antenna array in accordance with the identified activation states of the one or more antenna elements.

[0013] Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein can further include operations, features, means, or instructions for transmitting, to the second wireless device, a request for the second wireless device to configure an activation state of one or more antenna elements, where the second indication can be received based on transmitting the request.

[0014] In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the request indicates a number of antenna elements associated with the request, indicates that the request can be associated with one or more antenna elements, or both.

[0015] In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, transmitting the first indication regarding one or more parameter values indicating a structure of an antenna array can include operations, features, means, or instructions for transmitting a first parameter value indicating an arrangement of antenna elements within the antenna array, a second parameter value indicating a number of antenna elements within the antenna array, or both, where receiving the second indication can be based at least in part on the first parameter value, the second parameter value, or both.

[0016] In some examples of the method, apparatuses, and non-transitory computer- readable medium described herein, transmitting the first indication regarding one or more parameter values indicating a structure of an antenna array can include operations, features, means, or instructions for transmitting a first parameter value associated with a supported phase or amplitude of one or more phase shifters of the antenna array, a second parameter value indicating a size of the antenna array, a third parameter value indicating one or more distances between antenna elements of the antenna array, or any combination thereof, where receiving the second indication can be based on the first parameter value, the second parameter value, the third parameter value, or any combination thereof.

[0017] In some examples of the method, apparatuses, and non-transitory computer- readable medium described herein, the first parameter value indicating an arrangement of antenna elements within the antenna array includes an indication regarding a uniform linear array (ULA), a uniform rectangular array (URA), a uniform circular array (UCA), or any combination thereof.

[0018] Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein can further include operations, features, means, or instructions for transmitting, to the second wireless device, an indication that an activation state of a subset of antenna elements of the set of antenna elements can not be modified, where receiving the second indication can be based at least in part on transmitting the indication that the activation state of the subset of antenna elements can not be modified.

[0019] In some examples of the method, apparatuses, and non-transitory computer- readable medium described herein, receiving the second indication to modify the activation state of the one or more antenna elements can include operations, features, means, or instructions for receiving an indication to modify a low noise amplifier (LNA) metric associated with the one or more antenna elements, a phase shifter metric associated with the one or more antenna elements, a power level metric associated with the one or more antenna elements, or any combination thereof.

[0020] In some examples of the method, apparatuses, and non-transitory computer- readable medium described herein, receiving the second indication to modify the activation state of the one or more antenna elements can include operations, features, means, or instructions for receiving an indication to deactivate the one or more antenna elements.

[0021] In some examples of the method, apparatuses, and non-transitory computer- readable medium described herein, the first indication can be transmitted via a radio resource control (RRC) message, a medium access control - control element (MAC-CE) message, an uplink control information (UCI) message, a channel state information (CSI) report message, or any combination thereof.

[0022] In some examples of the method, apparatuses, and non-transitory computer- readable medium described herein, the second indication can be received via a RRC message, a MAC-CE, a downlink control information (DCI) message, a feedback message in response to a CSI report message, or any combination thereof.

[0023] Some examples of the method, apparatuses, and non-transitory computer- readable medium described herein can further include operations, features, means, or instructions for identifying a second activation state of a set of antenna elements of an antenna array, the second activation state configured for performing transmissions; transmitting, to the second wireless device, a reference signal according to the second activation state; and receiving, from the second wireless device, a third indication to modify the second activation state, to perform transmissions using the second activation state, or both based on transmitting the reference signal.

[0024] Some examples of the method, apparatuses, and non-transitory computer- readable medium described herein can further include operations, features, means, or instructions for transmitting, to the second wireless device, a signal according to the third indication to modify the second activation state, to perform transmissions using the second activation state, or both.

[0025] Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein can further include operations, features, means, or instructions for receiving, from the second wireless device, an indication of a second activation state configured for the first wireless device to perform transmissions, where transmitting the reference signal according to the second activation state can be based on receiving the indication of the second activation state.

[0026] Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein can further include operations, features, means, or instructions for identifying a signal transmitted by a third wireless device, and transmitting, to a second wireless device, a report including an indication of the signal transmitted by the third wireless device, where receiving the second indication to modify the activation state of one or more antenna elements of the set of antenna elements of the antenna array can be based on transmitting the report.

[0027] In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the first wireless device comprises a UE, a first IAB node, or both, and where the second wireless device comprises a base station, a second IAB node, or both.

[0028] In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the one or more characteristics of the beam formable by the antenna array comprise an orientation of a main beam, an orientation of an unintended lobe, a size or shape of the main beam, a size or shape of the unintended lobe, or any combination thereof.

[0029] A method of wireless communication is described at a second wireless device. The method can include receiving, from a first wireless device, a first indication of a capability of the first wireless device to selectively configure an activation state of a set of antenna elements of an antenna array of the first wireless device, and one or more parameter values indicating a structure of the antenna array, and transmitting, to the first wireless device in response to the received first indication, a second indication for the first wireless device to modify the activation state of one or more antenna elements of the set of antenna elements of the antenna array.

[0030] An apparatus for wireless communication at a second wireless device is described. The apparatus can include a processor, memory coupled with the processor, and instructions stored in the memory. The instructions can be executable by the processor to cause the apparatus to receive, from a first wireless device, a first indication of a capability of the first wireless device to selectively configure an activation state of a set of antenna elements of an antenna array of the first wireless device, and one or more parameter values indicating a structure of the antenna array, and transmit, to the first wireless device in response to the received first indication, a second indication for the first wireless device to modify the activation state of one or more antenna elements of the set of antenna elements of the antenna array.

[0031] Another apparatus for wireless communication at a second wireless device is described. The apparatus can include means for receiving, from a first wireless device, a first indication of a capability of the first wireless device to selectively configure an activation state of a set of antenna elements of an antenna array of the first wireless device and one or more parameter values indicative of a structure of the antenna array and transmitting, to the first wireless device and in response to the received first indication, a second indication for the first wireless device to modify the activation state of one or more antenna elements of a set of antenna elements of the antenna array.

[0032] A non-transitory computer-readable medium storing code for wireless communication at a second wireless device is described. The code can include instructions executable by a processor to receive, from a first wireless device, a first indication of a capability of the first wireless device to selectively configure an activation state of a set of antenna elements of an antenna array of the first wireless device and one or more parameter values indicative of a structure of the antenna array and transmit, to the first wireless device and in response to the received first indication, a second indication for the first wireless device to modify the activation state of one or more antenna elements of a set of antenna elements of the antenna array.

[0033] Some examples of the method, apparatus, and non-transitory computer-readable medium described herein can further include operations, features, means, or instructions for determining a location of the first wireless device, a location of the third wireless device, or both, where transmitting the second indication can be based on the determined location of the first wireless device, the determined location of the third wireless device, or both.

[0034] Some examples of the method, apparatus, and non-transitory computer-readable medium described herein can further include operations, features, means, or instructions for determining a first communication configuration for wireless communication at the first wireless device, a second communication configuration for wireless communication at the third wireless device, or both, where transmitting the second indication can be based on the determined first communication configuration, the determined second communication configuration, or both.

[0035] Some examples of the method, apparatus, and non-transitory computer-readable medium described herein can further include operations, features, means, or instructions for communicating with the first wireless device based on the transmitted second indication to adjust the activation state of the one or more antenna elements.

[0036] Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein can further include operations, features, means, or instructions for receiving, from the first wireless device, a request for the second wireless device to configure an activation state of one or more antenna elements, where the second indication can be transmitted based on receiving the request.

[0037] In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the request includes an indication of a number of antenna elements associated with the request, an indication that the request can be associated with one or more antenna elements, or both.

[0038] In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, receiving the first indication of one or more parameter values indicating a structure of an antenna array can include operations, features, means, or instructions for receiving one or more of a first parameter value indicating an arrangement of antenna elements within the antenna array, a second parameter value indicating a number of antenna elements within the antenna array, a third parameter value indicating a size of the antenna array, or a fourth parameter value indicating one or more distances between antenna elements of the antenna array, where transmitting the second indication can be based on one or more of the first parameter value, the second parameter value, the third parameter value, or the fourth parameter value.

[0039] In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the first parameter value indicating an arrangement of antenna elements within the antenna array includes an indication of a ULA, a URA, a UCA, or any combination thereof.

[0040] Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein can further include operations, features, means, or instructions for receiving, from the first wireless device, an indication that an activation state of a subset of antenna elements of the set of antenna elements can not be modified, where transmitting the second indication can be based at least in part on receiving the indication that the activation state of the subset of antenna elements can not be modified.

[0041] In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, transmitting the second indication to modify the activation state of one or more antenna elements can include operations, features, means, or instructions for transmitting an indication to modify a LNA metric associated with one or more antenna elements, a phase shifter metric associated with one or more antenna elements, a power level metric associated with one or more antenna elements, or any combination thereof.

[0042] In some examples of the method, apparatuses, and non-transitory computer- readable medium described herein, transmitting the second indication to modify the activation state of the one or more antenna elements can include operations, features, means, or instructions for transmitting an indication to deactivate the one or more antenna elements.

[0043] In some examples of the method, apparatuses, and non-transitory computer- readable medium described herein, the first indication can be transmitted via a RRC message, a MAC-CE, a UCI message, a CSI report message, or any combination thereof.

[0044] In some examples of the method, apparatuses, and non-transitory computer- readable medium described herein, the second indication can be transmitted via a RRC message, a MAC-CE, a DCI message, a feedback message in response to a CSI report message, or any combination thereof.

[0045] Some examples of the method, apparatuses, and non-transitory computer- readable medium described herein can further include operations, features, means, or instructions for transmitting, to the first wireless device, an indication of a second activation state of a set of antenna elements of the antenna array, the second activation state configured for performing transmissions at the first wireless device; receiving, from the first wireless device, a reference signal based on transmitting the indication of the second activation state; and transmitting, to the first wireless device, a third indication to modify the second activation state, perform transmissions using the second activation state, or both, in response to receiving the reference signal.

[0046] Some examples of the method, apparatuses, and non-transitory computer- readable medium described herein can further include operations, features, means, or instructions for receiving, from the first wireless device, a signal in accordance with a third indication to modify the second activation state, perform transmissions using the second activation state, or both.

[0047] Some examples of the method, apparatuses, and non-transitory computer- readable medium described herein can further include operations, features, means, or instructions for receiving, from the first wireless device, a report including an indication of a signal transmitted by a third wireless device and received by the first wireless device, wherein transmitting the second indication to modify the activation state of the one or more antenna elements of the set of antenna elements of the antenna array can be based on receiving the report.

[0048] In some examples of the method, apparatuses, and non-transitory computer- readable medium described herein, the first wireless device includes a UE, a first IAB node, or both, and wherein the second wireless device includes a base station, a second IAB node, or both. SUMMARY

[0050] Figure 1An example of a process flow that supports base station reporting for user equipment (UE) antenna selection is shown.

[0051] Figure 2 An example of a process flow that supports base station reporting for user equipment (UE) antenna selection is shown.

[0052] Figure 3 An example of a process flow that supports base station reporting for user equipment (UE) antenna selection is shown.

[0053] Figure 4 and Figure 5 A block diagram of an apparatus that supports base station reporting for user equipment (UE) antenna selection is shown.

[0054] Figure 6 A block diagram of a communications manager that supports base station reporting for user equipment (UE) antenna selection is shown.

[0055] Figure 7 A diagram of a system including an apparatus that supports base station reporting for user equipment (UE) antenna selection is shown.

[0056] Figures 8 to 11 A flow diagram of a method that supports base station reporting for user equipment (UE) antenna selection is shown.

[0057] DETAILED DESCRIPTION

[0058] In some wireless communications systems, some wireless devices can be configured to communicate using high frequency spectrum, such as millimeter wave (mmW) spectrum and sub-terahertz (THz) spectrum. As wireless communication frequencies increase, the wavelength of the signals decreases, which results in antenna elements of wireless devices becoming smaller and spaced closer together. Smaller antenna elements can enable a greater number of antenna elements to be disposed within an antenna array, allowing for beamforming and improved beam spatial separation. However, the increase in the number of antenna elements within an antenna array can correspond to a linear increase in antenna array power consumption, which can degrade battery life and overall user experience.

[0059] Some wireless devices have attempted to reduce the power consumption of an antenna array using a lens (e.g., a dielectric lens) within the wireless device. However, the use of a lens to reduce power consumption is limited by complex implementation and lack of robustness. Other wireless devices (e.g., UEs) have attempted to reduce the power consumption of an antenna array by selectively deactivating a subset of antenna elements within the antenna array. For example, a UE can reduce the power consumption of an antenna array by adjusting the activation state of every other antenna element within the antenna array (e.g., by deactivating every other antenna element to “interleave”). However, by deactivating some antenna elements within the antenna array, the spatial separation between the antenna elements increases, which can result in unintended grating lobes that are susceptible to interference from other wireless devices. In this regard, the unilateral deactivation of antenna elements by a wireless device (e.g., a UE) can improve power consumption, but can result in increased interference and a corresponding decrease in wireless communication reliability (e.g., due to the creation of grating lobes). Other wireless devices have attempted to improve antenna array power consumption by disabling antenna elements along the edges or borders of an antenna array. However, such techniques can expand the beam width and reduce the antenna array gain, making these techniques undesirable.

[0060] Accordingly, techniques for configuring the activation state of antenna elements are disclosed. In particular, the techniques described herein relate to signaling between wireless devices (e.g., UEs, base stations, integrated access and backhaul (IAB) nodes) that enables a second wireless device (e.g., a base station) to modify the activation state of antenna elements of a first wireless device (e.g., a UE). By enabling wireless devices to modify the activation state of other wireless devices based on an understanding of wireless communications within a network, such techniques can provide improved antenna array power consumption while simultaneously reducing interference caused by grating lobes. For example, a UE can indicate to a base station that the UE is capable of configuring (e.g., modifying, adjusting) the activation state of antenna elements within an antenna array. The UE can also report parameters associated with the structure of the antenna array, such as the arrangement of antenna elements, the size of the antenna array, the number of antenna elements, or any combination thereof. The base station can then instruct the UE to modify the activation state of one or more antenna elements using the determined parameters of the antenna array. The UE can then determine (e.g., modify, adjust) the activation state of the antenna elements of the antenna array, which can reduce power consumption at the UE and improve battery performance.

[0061] In some cases, the base station can additionally determine one or more characteristics of the network, and can instruct the UE to modify the activation state of the antenna elements based on both the determined parameters of the antenna array and the determined characteristics of the network. The characteristics of the network that can be used to selectively modify the activation state of the antenna elements can include a location of the UE within the network, an uplink / downlink configuration of the UE within the network, or both. For example, the base station can determine a location of the UE relative to other UEs within the network, and can instruct the UE to modify the activation state of one or more antenna elements based on the structure of the antenna array and the relative location of the UE such that the raster nodes generated by the modification of the antenna elements do not cause interference from other UEs.

[0062] The techniques described herein can enable a wireless device (e.g., a base station, an IAB node) to selectively modify the activation state of antenna elements of other wireless devices (e.g., UEs, IAB nodes) based on the structure of the antenna elements and characteristics of the network, which can reduce power consumption of the antenna array and reduce interference as compared to other techniques.

[0063] Aspects of the disclosure are initially described in the context of a wireless communications system. Additional aspects of the disclosure are described in the context of example process flows. Aspects of the disclosure are further illustrated by and described with reference to apparatus diagrams, system diagrams, and flowcharts that relate to base station reporting for UE antenna selection.

[0064] Figure 1 An example of a wireless communications system 100 that supports base station reporting for UE antenna selection is shown in accordance with aspects of the present disclosure. The wireless communications system 100 can include one or more base stations 105, one or more UEs 115, and a core network 130. In some examples, the wireless communications system 100 can be a Long Term Evolution (LTE) network, an LTE- Advanced (LTE-A) network, an LTE-A Pro network, or a New Radio (NR) network. In some examples, the wireless communications system 100 can support enhanced broadband communications, ultra-reliable (e.g., mission critical) communications, low latency communications, communications with low-cost and low-complexity devices, or any combination thereof.

[0065] The base stations 105 can be dispersed throughout the geographic area 100 and can be of different forms or have different capabilities. The base stations 105 and UEs 115 can wirelessly communicate via one or more communication links 125. Each base station 105 can provide a coverage area 110 over which UEs 115 and base stations 105 can establish one or more communication links 125. The coverage area 110 can be an example of a geographic area over which base stations 105 and UEs 115 can support signal communication in accordance with one or more radio access technologies.

[0066] The UEs 115 can be dispersed throughout the coverage areas 110 of the wireless communication system 100, and each UE 115 can be stationary, or mobile, or both at different times. The UEs 115 can be devices in different forms or having different capabilities. Some example UEs 115 are illustrated in FIG. 1. A UE 115 described herein can be able to communicate with various types of devices, such as other UEs 115, base stations 105, or network equipment (e.g., core network nodes, relay devices, integrated access and backhaul (IAB) nodes, or other network equipment), as shown in FIG. 1. Figure 1 Some example UEs 115 are illustrated in FIG. 1. A UE 115 described herein can be able to communicate as a function of cellular communication capabilities, a wireless Figure 1 network communication capabilities, and / or another type of communication capabilities. For example, some UEs 115 can be a wireless local loop (WLL) station, an Internet of Things (IoT) device, an Internet of Everything (IoE) device, or a machine-type

[0067] The base stations 105 can communicate with the core network 130, or with one another, or both. For example, the base stations 105 can interface with the core network 130 through one or more backhaul links 120 (e.g., via an SI, N2, N3, or other interface). The base stations 105 can communicate with one another over the backhaul links 120 (e.g., via an X2, Xn, or other interface) either directly (e.g., directly between base stations 105), or indirectly (e.g., via core network 130), or both. In some examples, the backhaul links 120 can be or include one or more wireless links.

[0068] One or more of the base stations 105 described herein can include or can be referred to as a base transceiver station, a radio base station, an access point, a radio transceiver, a NodeB, an eNodeB (eNB), a next-generation NodeB or a giga-NodeB (either of which can be referred to as a gNB), a Home NodeB, a Home eNodeB, or other suitable terminology.

[0069] A UE 115 can include or can be referred to as a mobile device, a wireless device, a remote device, a handheld device, or a subscriber device, or some other suitable terminology, where the “device” can also be referred to as a unit, a station, a terminal, or a client, among other examples. A UE 115 can also include or can be referred to as a personal electronic device such as a cellular phone, a personal digital assistant (PDA), a tablet computer, a laptop computer, or a personal computer. In some examples, a UE 115 can include or be referred to as a wireless local loop (WLL) station, an Internet of Things (IoT) device, an Internet of Everything (IoE) device, or a machine type communications (MTC) device, among other examples, which can be implemented in various objects such as appliances or vehicles, meters or other equipment, among other examples.

[0070] A UE 115 described herein can be able to communicate as a function of cellular communication capabilities, a wireless Figure 1 network communication capabilities, and / or another type of communication capabilities. For example, some UEs 115 can be a wireless local loop (WLL) station, an Internet of Things (IoT) device, an Internet of Everything (IoE) device, or a machine-type

[0071] The UEs 115 and the base stations 105 can wirelessly communicate with one another via one or more communication links 125 over one or more carriers. The term “carrier” can refer to a set of radio frequency spectrum resources with a defined physical layer structure configured to carry physical layer signaling, user data, or both. For example, a carrier used for a communication link 125 can include a portion of a radio frequency spectrum band (e.g., a frequency

[0072] In some examples (e.g., in carrier aggregation configurations), a carrier can also have acquisition signaling or control signaling that coordinates operations for other carriers. A carrier can be associated with a frequency channel (e.g., an evolved universal mobile telecommunication system terrestrial radio access (E-UTRA) absolute radio frequency channel number (EARFCN)) and can be positioned according to a channel raster for discovery by the UEs 115. Carriers can be operated in a standalone mode where initial acquisition and connection can be achieved via the carriers, or the carriers can be operated in a non-standalone mode where acquisition and connection can be achieved using a different carrier (e.g., a carrier of a different radio access technology).

[0073] The communication links 125 shown in wireless communication system 100 can include uplink transmissions from a UE 115 to a base station 105, or downlink transmissions from a base station 105 to a UE 115. Carriers can carry downlink or uplink communications (e.g., in an FDD mode), or can be configured to carry downlink and uplink communications (e.g., in a TDD mode).

[0074] A carrier can be associated with a particular bandwidth of the radio frequency spectrum, and in some examples the carrier bandwidth can be referred to as a “system bandwidth” of the carrier or wireless communications system 100. For example, the carrier bandwidth can be one of a set of determined bandwidths for carriers of a particular radio access technology, such as 1.4, 3, 5, 10, 15, 20, 40, or 80 megahertz (MHz). Devices of wireless communications system 100 (e.g., base stations 105, UEs 115, or both) can have hardware configurations that support communications over a particular carrier bandwidth, or can be configurable to support communications over one of a set of carrier bandwidths. In some examples, wireless communications system 100 can include base stations 105 or UEs 115 that support simultaneous communications via carriers associated with multiple carrier bandwidths. In some examples, each served UE 115 can be configured for operating over portions (e.g., sub-bands, BWPs) or all of a carrier bandwidth.

[0075] Signal waveforms transmitted over a carrier can be composed of multiple subcarriers (e.g., using multi-carrier modulation (MCM) techniques such as orthogonal frequency division multiplexing (OFDM) or discrete Fourier transform spread OFDM (DFT-S-OFDM). In

[0076] Time intervals for base stations 105 or UEs 115 can be expressed in multiples of a basic time unit, which may, for example, be a sampling period of Ts= 1 / 30,720,000 seconds. Time intervals of a communications resource can be expressed in multiples of the basic time unit. A subframe, a slot, a mini-slot, or a symbol can be the smallest time period that can be may represent the maximum supported subcarrier spacing, while N f may represent the maximum supported Discrete Fourier Transform (DFT) size. Time intervals of a communications resource can be organized as radio frames, each

[0077] ​Each frame can include a plurality of sequentially numbered subframes or slots, and each subframe or slot can have the same duration. In some examples, a frame can be divided (e.g., in the time domain) into subframes, and each subframe can be further divided into a number of slots. Alternatively, each frame can include a variable number of slots, and the number of slots can depend on the subcarrier spacing. Each slot can include a number of symbol periods (e.g., depending on the length of the cyclic prefix prepended to each symbol period). In some wireless communication systems 100, a slot can be further divided into a plurality of mini-slots containing one or more symbols. Excluding the cyclic prefix, each symbol period can contain one or more (e.g., N f The duration of a symbol period can depend on the subcarrier spacing or the operating band.

[0078] A subframe, a slot, a mini-slot, or a symbol can be the smallest scheduling unit (e.g., in the time domain) of the wireless communications system 100 and can be referred to as a transmission time interval (TTI). In some examples, the TTI duration (e.g., the number of symbol periods in a TTI) can be variable. Additionally or alternatively, the smallest scheduling unit of the wireless communications system 100 can be dynamically selected (e.g., in bursts of shortened TTIs (sTTIs)).

[0079] Physical channels can be multiplexed on a carrier according to various techniques. A physical control channel and a physical data channel can be multiplexed on a downlink carrier, for example, using one or more of time division multiplexing (TDM) techniques, frequency division multiplexing (FDM) techniques, or hybrid TDM-FDM techniques. A control region (e.g., a control resource set (CORESET)) for a physical control channel can be defined by a number of symbol periods and can extend across the system bandwidth or a subset of the system bandwidth of the carrier. One or more control regions (e.g., CORESETs) can be configured for a set of UEs 115. For example, one or more of the UEs 115 can monitor or search the control region for control information according to one or more search space sets, and each search space set can include one or more control channel candidates arranged in an aggregation level of one or more of the control channel candidates in a cascaded manner. An aggregation level for a control channel candidate can refer to a number of control channel resources (e.g., control channel elements (CCEs)) associated with encoded information for a control information format having a given payload size. A search space set can include common search space sets configured for sending control information to multiple UEs 115 and UE-specific search space sets configured for sending control information to a specific UE 115.

[0080] In some examples, a base station 105 can be movable and therefore provide communication coverage for a moving geographic coverage area 110. In some examples, different geographic coverage areas 110 associated with different technologies can overlap, but the different geographic coverage areas 110 can be supported by the same base station 105. In other examples, overlapping geographic coverage areas 110 associated with different technologies can be supported by different base stations 105. The wireless communications system 100 can include, for example, a heterogeneous network in which different types of the base stations 105 provide coverage for various geographic coverage areas 110 using the same or different radio access technologies.

[0081] The wireless communications system 100 can be configured to support ultra-reliable communications or low-latency communications, or various combinations thereof. For example, the wireless communications system 100 can be configured to support ultra-reliable low-latency communications (URLLC) or mission critical communications. UEs 115 can be designed to support ultra-reliable, low-latency, or mission critical functions (e.g., mission critical function). Ultra-reliable communications can include private communication or group communication and can be supported by one or more mission critical services such as mission critical push-to-talk (MCPTT), mission critical video (MCVideo), or mission critical data (MCData). Support for mission critical functions can include prioritization of services, and mission critical services can be used for public safety or general commercial applications. The terms ultra-reliable, low-latency, mission critical, and ultra-reliable low- latency can be used interchangeably herein.

[0082] In some examples, UEs 115 can also be able to communicate directly with other UEs 115 using a device-to-device (D2D) communication link 135 (e.g., using a peer-to-peer (P2P) or D2D protocol). One or more UEs 115 utilizing D2D communications can be within the geographic coverage area 110 of a base station 105. Other UEs 115 in such a group can be outside the geographic coverage area 110 of a base station 105, or be otherwise unable to receive transmissions from a base station 105. In some examples, groups of UEs 115 communicating via D2D communications can utilize a one-to-many (1:M) system in which each UE 115 transmits to every other UE 115 in the group. In some examples, a base station 105 facilitates the D2D communications between UEs 115 by transmitting

[0083] In some systems, the D2D communication link 135 can be an example of a communication channel, such as a sidelink communication channel, between vehicles (e.g., UEs 115). In some examples, vehicles can communicate using vehicle-to-everything (V2X) communications, vehicle-to-vehicle (V2V) communications, or some combination of these. A vehicle can signal information related to traffic conditions, signal scheduling, weather, safety, emergencies, or any other information related to V2X systems. In some examples, vehicles in a V2X system can communicate with roadside infrastructure, such as roadside units, or with a network via one or more network nodes, such as base stations 105, using vehicle-to-network (V2N) communications, or with both.

[0084] The core network 130 can provide user authentication, access authorization, tracking, Internet Protocol (IP) connectivity, and other access, routing, or mobility functions. The core network 130 can be an evolved packet core (EPC) or 5G core (5GC), which can include at least one control plane entity that manages access and mobility (e.g., a mobility management entity (MME), an access and mobility management function (AMF)) and at least one user plane entity that routes packets or interconnects to external networks (e.g., a serving gateway (S-GW), a Packet Data Network (PDN) gateway (P-GW), or a user plane function (UPF)). The control plane entity can manage non-access stratum (NAS) functions, such as mobility, authentication, and bearer management for UEs 115 served by base stations 105 associated with the core network 130. User IP packets can be transferred through the user plane entity, which can provide IP address allocation as well as other functions. The user plane entity can be connected to the IP services 150 of the one or more network operators. The IP services 150 can include access to the Internet, Intranet, an IP Multimedia Subsystem (IMS), or a Packet-Switched Streaming Service.

[0085] Some of the network devices, such as a base station 105, can include subcomponents such as an access network entity 140, which can be an example of an access node controller (ANC). Each access network entity 140 can communicate with UEs 115 through one or more other access network transmission entities 145, which can be referred to as radio heads, smart radio heads, or transmission / reception points (TRPs). Each access network transmission entity 145 can include one or more antenna panels. In some configurations, various functions of each access network entity 140 or base station 105 can be distributed across various network devices (e.g., radio heads and ANCs) or consolidated into a single network device (e.g., a base station 105).

[0086] The wireless communications system 100 can operate using one or more frequency bands, typically in the range of 300 megahertz (MHz) to 300 gigahertz (GHz). Generally, the region from 300 MHz to 3 GHz is known as the ultra-high frequency (UHF) region or decimeter band, since the wavelengths range from approximately one decimeter to one meter in length. The UHF wave s can be blocked or redirected by buildings and environmental features, but the waves can penetrate structures sufficiently for a macro cell to provide service within an indoor location. The transmission of UHF waves may- be associated with smaller antennas and shorter ranges (e.g., less than 100 kilometers) compared to transmission using the smaller frequencies and longer waves of the high frequency (HF) or very high frequency (VHF) portion of the spectrum below 300 MHz.

[0087] The wireless communications system 100 can utilize both licensed and unlicensed radio frequency spectrum bands. For example, the wireless communications system 100 can employ License Assisted Access (LAA), LTE-Unlicensed (LTE-U) radio access technology, or NR technology in an unlicensed frequency band such as the 5 GHz industrial, scientific, and medical (ISM) band. When operating in unlicensed frequency

[0088] The base stations 105 or UEs 115 can be equipped with multiple antennas, which can be used to employ techniques such as transmit diversity, receive diversity, multiple-input multiple-output (MIMO) communications, or beamforming. The antennas of a base station 105 or a UE 115 can be co-located within one or more antenna assemblies or antenna panels. For example, one or more base station antennas or antenna arrays can be co-located at an antenna tower. In some examples, the antennas associated with a base station 105 can be located in different geographic locations. A base station 105 can have antenna arrays with a number of rows and columns of antenna ports that the base station 105 can use for beamforming with the UEs 115. Likewise, a UE 115 can have one or more antenna arrays that can support various MIMO or beamforming operations. Additionally or alternatively, antenna panels can support radio frequency beamforming for signals transmitted via the antenna ports.

[0089] The base stations 105 or the UEs 115 can use MIMO communications through transmission or reception of multiple signals via different spatial layers. Such techniques can be referred to as spatial multiplexing. The transmission or reception can be on the same or different antenna arrays. Each of the multiple signals can be referred to as a spatial stream. For example, a transmitter device such as a base station 105 can transmit multiple data streams on different spatial layers to a receiver device such as a UE 115. The transmitter device and the receiver device can be equipped with multiple antennas to facilitate multiple spatial layers. Each spatial layer can carry a different data stream. Each data stream can be transmitted on a different spatial layer. Each spatial layer can be associated with a different antenna array, or different antenna array combination, at the transmitter device and the receiver device. The data streams can carry different or identical data. Different data streams can carry different or identical types of data. Different data streams can carry different types of data. The same data stream can be carried on different spatial layers at different times.

[0090] Beamforming, which can also be referred to as spatial filtering, directional transmission, or directional reception, is a signal processing technique that can be used at a transmitter device or receiver device (e.g., a base station 105, a UE 115) to shape or steer a beam of energy in the manner of a laser beam to overcome the path loss in propagation and to increase the signal-to-noise ratio at the receiver from the transmitter.

[0091] The base stations 105 or the UEs 115 can use beam sweeping techniques as part of a beamforming operation. For example, a base station 105 can use multiple antennas or antenna arrays (e.g., antenna panels) to conduct beamforming operations for directional communications with a UE 115. Some signals (e.g., synchronization signals, reference signals, beam selection signals, or other control signals) can be transmitted by a base station 105 multiple times in different directions. For example, the base station 105 can transmit a signal according to different beamforming weight sets associated with different directions. Transmissions in different beam directions can be used to identify (e.g., by a transmitting device such as a base station 105, or by a receiving device such as a UE 115) a beam direction for subsequent transmission and reception by the base station 105.

[0092] Some signals (e.g., data signals associated with particular receiving devices) can be transmitted by base stations 105 in a single beam direction (e.g., associated with a receiving device, such as a UE 115). In some examples, the beam direction associated with the transmission of data signals to the receiving device can be determined based on a signal that was transmitted in one or more beam directions. For example, a UE 115 can receive one or more of the signals transmitted by the base station 105 in different directions and can report to the base station 105 an indication of the signal that the UE 115 received with a highest signal quality, or other acceptable signal quality.

[0093] In some examples, transmissions by a device (e.g., by a base station 105 or a UE 115) can be performed using multiple beam directions, and the device can use a combination of digital precoding or radio frequency beamforming to generate a combined beam for transmissions (e.g., transmissions from a base station 105 to a UE 115). A UE 115 can report feedback that indicates precoding weights for one or more beam directions, and the feedback can correspond to a configured number of beams across a system bandwidth or one or more sub-bands. The base station 105 can transmit reference signals (e.g., cell-specific reference signals (CRS), channel state information reference signals (CSI-RS),) that can be precoded or unprecoded. The UE 115 can provide feedback for beam selection, which can be a precoding matrix indicator (PMI) or codebook-based feedback (e.g., a multi-panel type codebook, a linear combination type codebook, a port selection type codebook). Although these techniques are described with reference to signals transmitted in one or more directions by a base station 105, a UE 115 can employ similar techniques for transmitting signals multiple times in different directions (e.g., for identifying beam directions for subsequent transmissions or receptions by the UE 115) or for transmitting a signal in a single direction (e.g., for transmitting data to a receiving device).

[0094] A receiving device (e.g., a UE 115) can try multiple receive configurations (e.g., directional listening) when receiving various signals from base stations 105, such as synchronization signals, reference signals, beam selection signals, or other control signals. For example, a receiving device can try multiple receive directions by differentially rotating a receive beam across different receive

[0095] The wireless communications system 100 can be a packet-based network that operates according to a layered protocol stack. In the user plane, communications at the bearer or Packet Data Convergence Protocol (PDCP) layer can be IP -based. A Radio Link Control (RLC) layer can perform packet segmentation and reassembly to communicate over logical channels. A Medium Access Control (MAC) layer can perform priority handling and multiplexing of logical channels into transport channels. The MAC layer can also use error detection techniques, error correction techniques, or both, to support retransmissions at the MAC layer, e.g., using a hybrid automatic repeat request (HARQ) technique, to improve link efficiency. In the control plane, the Radio Resource Control (RRC) protocol layer can provide establishment, configuration, and maintenance of an RRC connection between a UE 115 and a base station 105 or core network 130 supporting radio bearers for user plane data. At the physical layer, transport channels can be mapped to physical channels.

[0096] The UEs 115 and the base stations 105 can support retransmissions of data to increase the likelihood that data is received successfully. HARQ feedback is one technique of allowing the base station 105 to support retransmissions of data. HARQ can include a combination of error detection (e.g., using a cyclic redundancy check (CRC)), forward error correction (FEC), and retransmission (e.g., automatic repeat request (ARQ)). HARQ can improve throughput at the MAC layer in poor radio conditions (e.g., low signal-to-noise conditions). In some examples, a device can support same-slot HARQ feedback, where the device can provide HARQ feedback in a specific timeslot for data received in a previous timeslot. In other cases, the device can provide HARQ feedback in a subsequent timeslot or according to some other time interval.

[0097] The UEs 115 and the base stations 105 of the wireless communications system 100 can support signaling that enables a second wireless device (e.g., a base station 105) to modify an activation state of antenna elements of a first wireless device (e.g., a UE 115). In particular, the techniques described herein can enable a base station 105 of the wireless communications system 100 to modify an activation state of antenna elements of a UE 115 based on information regarding a structure of an antenna array at the UE 115 and network conditions within the wireless communications system 100. By enabling wireless devices (e.g., base stations 105, IAB nodes) to modify the activation state of other wireless devices (e.g., UEs 115, IAB nodes) based on an understanding of wireless communications within the wireless communications system 100, such techniques can provide improved antenna array power consumption while reducing grating lobe induced interference. As previously described herein, the reduction in antenna array power consumption and the reduction in grating lobe induced interference can be particularly beneficial in the context of high frequency wireless communications, such as wireless communications performed over the mmW spectrum, the sub-THz spectrum, or both.

[0098] For example, a UE 115 of the wireless communications system 100 can indicate to a base station 105 that the UE is capable of configuring (e.g., modifying, adjusting) an activation state of antenna elements within an antenna array of the UE 115. The UE 115 can also report parameters associated with a structure of the antenna array, such as an arrangement of the antenna elements, a size of the antenna array, a number of antenna elements, or any combination thereof. The base station 105 can then instruct the UE 115 to modify the activation state of one or more antenna elements using the determined parameters of the antenna array, which can enable the UE 115 to reduce power consumption of the antenna array while simultaneously reducing or eliminating interference at the antenna array that can be caused by other techniques.

[0099] In some cases, the base station 105 can additionally determine one or more characteristics of the network (e.g., one or more characteristics of the wireless communications system 100) and can instruct the UE 115 to modify the activation state of the antenna elements based on both the determined parameters of the antenna array and the determined characteristics of the network. The network characteristics that can be used to selectively modify the antenna elements can include a location of the UE 115 within the network, an uplink / downlink configuration of the UE 115 within the network, or both. For example, the base station 105 can determine a location of the UE 115 relative to other UEs 115 within the network and can instruct the UE 115 to modify the activation state of one or more antenna elements based on the structure of the antenna array and the relative location of the UE 115 such that the raster nodes generated by the modification of the antenna elements do not cause interference from other UEs 115.

[0100] The techniques described herein can enable a wireless device (e.g., a base station 105, an IAB node) to selectively modify the activation state of antenna elements of other wireless devices (e.g., UEs 115, IAB nodes) based on the structure of the antenna elements and network characteristics. By enabling selective modification of the activation state associated with antenna elements based on the structure of the antenna array as well as network characteristics, the techniques described herein can reduce power consumption of the antenna array while also reducing or eliminating interference that can be caused by other power saving techniques.

[0101] Figure 2 An example of a wireless communications system 200 that supports base station 105 reporting for UE 115 antenna selection is shown in accordance with aspects of the present disclosure. In some examples, wireless communications system 200 can implement, or be implemented by, aspects of wireless communications system 100. Wireless communications system 200 can include a first UE 115-a, a second UE 115-b, and a base station 105-a, which can be examples of UEs 115 and base stations 105 as described with reference to FIGS. 1-2. Figure 1

[0102] ​The first UE 115-a and the second UE 115-b can communicate with the base station 105-a using communication links 205-a and 205-b, respectively, which can be examples of NR or LTE links between the first UE 115-a and the second UE 115-b and the base station 105-a, respectively. In some cases, the communication links 205-a and 205-b can include examples of access links (e.g., Uu links). The communication links 205-a and 205-b can include bidirectional links that support both uplink and downlink communications. For example, the first UE 115-a can transmit uplink signals, such as uplink control signals or uplink data signals, to the base station 105-a using the first communication link 205-a, and the base station 105-a can transmit downlink signals, such as downlink control signals or downlink data signals, to the first UE 115-a using the communication link 205-a. As another example, the second UE 115-b can transmit uplink signals, such as uplink control signals or uplink data signals, to the base station 105-a using the first communication link 205-b, and the base station 105 can transmit downlink signals, such as downlink control signals or downlink data signals, to the second UE 115-b using the communication link 205-b.

[0103] In some aspects, each of the first UE 115-a and the second UE 115-b can be configured to communicate with the base station 105-a using an antenna array. Each antenna array can include one or more antenna elements. In some aspects, the first UE 115-a can be capable of determining (e.g., modifying, adjusting) characteristics of the antenna elements independently of one another. For example, the first UE 115-a can be configured to determine (e.g., modify, adjust) activation states (e.g., low noise amplifier (LNA) metrics, phase shifter metrics, power levels) of at least a subset of the antenna elements of the antenna array independently of one another.

[0104] In some aspects, the first UE 115-a and the second UE 115-b can be configured to communicate with the base station 105-a via one or more beams 210-a and 210-b, respectively. For example, the first UE 115-a can be configured to communicate with the base station 105-a over the communication link 205-a via one or more beams 210-a (e.g., one or more main beams 210-a). Similarly, the second UE 115-b can be configured to communicate with the base station 105-a over the communication link 205-b via one or more beams 210-b (e.g., one or more main beams 210-b). The characteristics (e.g., shape, orientation, size) of the beams 210-a and 210-b can be modified via the beamforming techniques described herein. For example, parameters / characteristics of an antenna array (e.g., structure of the antenna array) can be associated with or determine characteristics of beams that the antenna array can form (e.g., can generate), including an orientation of a main beam 210, a presence (or absence) of grating lobes, an orientation of grating lobes, a size or shape of formed (e.g., generated) beams / grating lobes, or any combination thereof. Further, as will be described in further detail herein, the characteristics of the beams 210-a and 210-b can be determined and / or selectively modified by selectively adjusting activation states of antenna elements within the respective antenna arrays, such as power consumption of the antenna arrays used to generate the beams 210-a and 210-b.

[0105] As previously described herein, some wireless devices (e.g., UEs 115) have attempted to reduce the power consumption of an antenna array by selectively deactivating a subset of antenna elements within the antenna array. For example, according to some conventional techniques, a first UE 115-a can reduce the power consumption of the antenna array of the first UE 115-a by adjusting the activation state of every other antenna element within the antenna array (e.g., by deactivating every other antenna element to “interleave”). Adjusting the activation state of the subset of antenna elements of the antenna array can enable the first UE 115-a to reduce the power consumption of the antenna array while enabling the first UE 115-a to continue to wirelessly communicate with the base station 105-a via the communication link 205-a and one or more beams 210-a. However, by deactivating some of the antenna elements within the antenna array of the first UE 115-a, the spatial separation between the antenna elements is increased, which can result in unintended grating lobes 215 that are susceptible to interference from other wireless devices (e.g., a second UE 115-b). In this regard, the structure of the antenna array (e.g., the spatial separation between the antenna elements) can influence the characteristics of the beams formed by the antenna array, including the presence (or absence) of unintended grating lobes 215. For example, unilateral modification of the activation state of some of the antenna elements within the antenna array of the first UE 115-a can generate grating lobes 215-a, 215-b, 215-c, and 215-d that can be susceptible to interference. In particular, depending on the locations of the UEs 115-a and 115-b and the orientation of the grating lobes 215, the grating lobes 215 can be susceptible to interference caused by wireless communications transmitted from the second UE 115-b to the base station 105-a and / or other wireless devices. In this regard, unilateral deactivation of antenna elements by a wireless device (e.g., the first UE 115-a) can improve power consumption, but can result in increased interference and a corresponding decrease in wireless communication reliability (e.g., due to the generation of grating lobes 215).

[0106] Accordingly, the UEs 115 and base stations 105-a of the wireless communication system 200 can support signaling that enables a second wireless device (e.g., a base station 105-a) to modify the activation state of antenna elements of a first wireless device (e.g., a first UE 115-a). In particular, the techniques described herein can enable a base station 105-a of the wireless communication system 200 to modify the activation state of antenna elements of UEs 115-a and / or 115-b based on information regarding the structure of the antenna array at the UE 115 and network conditions within the wireless communication system 200. By enabling a base station 105-a to modify the activation state of other wireless devices (e.g., UEs 115) based on an understanding of wireless communications within the wireless communication system 200, such techniques can provide improved antenna array power consumption while simultaneously reducing interference caused by grating lobes 215.

[0107] For example, the first UE 115-a can transmit, to the base station 105-a, a first indication 220 regarding a capability of the first UE 115-a to selectively configure an activation state of one or more antenna elements of an antenna array of the first UE 115-a. In some aspects, the first indication 220 can also include an indication of one or more parameter values indicating a structure of the antenna array of the first UE 115-a. In some aspects, the first indication 220 can be transmitted via a RRC message, a medium access control-control element (MAC-CE) message, an uplink control information (UCI) message, a channel state information (CSI) report message, or any combination thereof. In some aspects, the first UE 115-a can transmit the first indication 220 based on performing a beam management procedure.

[0108] The one or more parameter values indicating the structure of the antenna array can include, but are not limited to, a parameter value indicating an arrangement of antenna elements within the antenna array, a parameter value indicating a number of antenna elements within the antenna array, a parameter value indicating a location of each element within the antenna array, a parameter value indicating a size of the antenna array (e.g., width, length, other dimension), a parameter value indicating one or more distances between elements of the antenna array (e.g., separation distance along an x-direction, separation distance along a y-direction), a parameter value indicating support parameters / characteristics of one or more phase shifters of the antenna array (e.g., supported range of phase shifter phase, supported range of phase shifter amplitude), or any combination thereof. For example, the one or more parameter values can include a parameter value indicating an arrangement of antenna elements within the antenna array of the first UE 115-a, where the one or more parameter values indicate that the antenna array includes a uniform linear array (ULA), a uniform rectangular array (URA), a uniform circular array (UCA), or any combination thereof.

[0109] In some aspects, the first indication 220 regarding the capability of the first UE 115-a to selectively configure an activation state of one or more antenna elements of the antenna array can additionally or alternatively include an indication that an activation state of an antenna element subset of a group of antenna elements of the antenna array cannot be modified. For example, the first indication 220 can include an indication that the first UE 115-a is capable of selectively configuring an activation state of a first antenna element subset of the group of antenna elements of the antenna array, and an indication that the first UE 115-a is not capable of selectively configuring an activation state of a second antenna element subset of the group of antenna elements of the antenna array.

[0110] In some aspects, the first indication 220 regarding the capability of the first UE 115-a to selectively configure an activation state of one or more antenna elements of the antenna array can additionally or alternatively include an indication that the first UE 115-a has a capability to change a power received from each antenna element (e.g., a capability to taper, a capability to steer a beam), or a number of possible attenuations, or both.

[0111] In some aspects, the first UE 115-a can transmit, to the base station 105-a, a request 225 regarding the base station 105-a configuring an activation state of one or more antenna elements of an antenna array of the first UE 115-a. In some aspects, the first UE 115-a can transmit the request 225 based on transmitting the first indication 220 regarding the capability and the antenna array parameter. In some cases, the first UE 115-a can transmit the request 225 in order to reduce power consumption of the antenna array at the first UE 115-a. For example, the first UE 115-a can receive a command to enter a lower power mode of operation (e.g., an input from a user) and can thereby transmit the request 225 based on identifying the command.

[0112] In some aspects, the request 225 can include an indication of a number of antenna elements associated with the request 225, an indication of which antenna elements are associated with the request 225, or both. For example, the first indication 220 can indicate that the antenna array includes ten antenna elements (e.g., antenna elements 1 through 10). In this example, the first UE 115-a can indicate to the base station 105-a via the request 225 that it wishes to selectively determine or modify the activation state of antenna elements numbered 1, 3, and 7.

[0113] In some aspects, the base station 105-a can determine a location of the first UE 115-a, the second UE 115-b, or both. In some aspects, the base station 105-a can determine a location of the first UE 115-a relative to other wireless devices within the wireless communications system 200, or vice versa. The base station 105-a can determine the location of the first UE 115-a and / or an additional wireless device (e.g., the second UE 115-b) based on reports received from the network and / or the wireless devices themselves, based on characteristics of signals received from the wireless devices (e.g., received signal strength indicator (RSSI), reference signal received power (RSRP), reference signal received quality (RSRQ)), and / or the like.

[0114] Additionally, or alternatively, the base station 105-a can determine a communication configuration associated with the first UE 115-a, the second UE 115-b, or both. The communication configuration can include a configuration or format of resources configured for uplink, downlink, flexible, and / or full-duplex communications at each of the respective UEs 115. For example, the base station 105-a can determine a first communication configuration for wireless communications at the first UE 115-a, a second communication configuration for wireless communications at the second UE 115-b, or both.

[0115] In some aspects, by determining the location and / or communication configuration of the first UE 115-a and / or the second UE 115-b, the base station 105-a can be configured to estimate a probability and / or severity of interference experienced at the first UE 115-a caused by signals transmitted by the second UE 115-b. The base station 105-a can then use the estimated probability and / or severity of interference experienced at the first UE 115-a to determine an antenna element activation state that should be used by the first UE 115-a. For example, in cases where the relative locations of the first UE 115-a and the second UE 115-b indicate that the first UE 115-a can be in a position to receive (e.g., intercept) signals transmitted by the second UE 115-b, the base station 105-a can identify that there is a high probability of interference at the first UE 115-a. Additionally or alternatively, the base station 105-a can identify that there is a high probability of interference at the first UE 115-a based on the communication configurations of the first UE 115-a and the second UE 115-b. For example, the base station 105-a can determine a first communication configuration associated with the first UE 115-a and a second communication configuration associated with the second UE 115-b. In this example, the base station 105-a can identify that there is a high probability of interference at the first UE 115-a based on determining that a set of downlink resources of the first communication configuration associated with the first UE 115-a overlap in the time domain with a set of uplink resources of the second communication configuration associated with the second UE 115-b. In these examples, the base station 105-a can utilize the estimated probability and / or severity of interference at the first UE 115-a to determine an activation state of antenna elements that should be used by the first UE 115-a.

[0116] In some cases, the base station 105-a can estimate a probability and / or severity of interference experienced at the first UE 115-a caused by signals transmitted by additional wireless devices (e.g., other UEs 115, other base stations 105, other transmission-reception points (TRPs)). In this regard, the base station 105-a can identify other wireless devices that can potentially cause interference at the first UE 115-a. In some aspects, the base station 105-a can estimate the probability and / or severity of interference experienced at the first UE 115-a based on a report or other signaling received from the first UE 115-a. For example, the first UE 115-a can identify (e.g., receive) a signal transmitted by an additional wireless device (not shown). In this example, the first UE 115-a can perform one or more measurements (e.g., RSSI measurements, RSRQ measurements, RSRP measurements, SNR measurements, SINR measurements) on the received signal. Subsequently, the first UE 115-a can transmit a report (e.g., a measurement report) including an indication (e.g., an indication of the performed measurements) regarding the signal transmitted by the additional wireless device to the base station 105-a. For example, the first UE 115-a can transmit a report indicating an RSSI measurement of the received signal. The base station 105-a can then estimate the probability and / or severity of interference at the first UE 115-a in order to determine an activation state of antenna elements that should be used by the first UE 115-a.

[0117] In some aspects, the base station 105-a can determine an activation state of one or more antenna elements of the first UE 115-a based on receiving the first indication 220, receiving the request 225, or both. Further, the base station 105-a can determine the activation state based on the determined locations of the UEs 115-a and 115-b, the determined communication configuration of the UEs 115-a and 115-b, a report (e.g., a measurement report) received from the first UE 115-a, or any combination thereof. For example, the base station 105-a can determine the activation state of the one or more antenna elements based on the parameter value indicating a structure of the antenna array of the first UE 115-a and a capability (or lack thereof) of the first UE 115-a to configure the activation state of individual antenna elements.

[0118] In some aspects, the base station 105-a can determine an activation state of one or more antenna elements that would reduce or eliminate potential interference caused by the generated grating lobes 215 due to the determined activation state. For example, the base station 105-a can determine an activation state of one or more antenna elements that would generate grating lobes 215 that are less susceptible to interference from the second UE 115-b (e.g., grating lobes 215 that are not directed in the direction of the potential source of interference). In this regard, the base station 105-a can determine an activation state of one or more antenna elements that would enable the first UE 115-a to experience little or no performance loss while simultaneously benefiting from a large power reduction. In other words, the base station 105-a can determine an activation state of one or more antenna elements that can adjust (e.g., deactivate, attenuate, taper, adjust a voltage provided to) as many antenna elements as possible without significantly increasing the interference that the first UE 115-a would experience.

[0119] After determining the activation state of one or more antenna elements of the first UE 115-a, the base station 105-a can transmit a second indication 230 to the first UE 115-a for the first UE 115-a to modify the activation state of one or more antenna elements of the antenna array of the first UE 115-a. In some aspects, the second indication 230 can be transmitted via a RRC message, a MAC-CE message, a downlink control information (DCI) message, a feedback message in response to a CSI report message, or any combination thereof. Further, in some aspects, the base station 105-a can transmit the second indication 230 periodically (e.g., periodic reporting), aperiodically (e.g., aperiodic reporting), or both. For example, the base station 105-a can periodically transmit the second indication 230 over time as network characteristics change (e.g., as the location of the first UE 115-a relative to the second UE 115-b changes, as the communication configuration of the UE 115 changes).

[0120] The base station 105-a can transmit the second indication 230 based on receiving the first indication 220, receiving the request 225, determining the location of the first UE 115-a and / or the second UE 115-b, determining the communication configuration associated with the first UE 115-a and / or the second UE 115-b, determining the activation state of one or more antenna elements of the first UE 115-a, or any combination thereof. Additionally or alternatively, the base station 105-a can transmit the second indication 230 based on receiving a report (e.g., a measurement report) indicating a signal received by the first UE 115-a transmitted by the second UE 115-b.

[0121] In some aspects, the second indication 230 can additionally include an indication of which antenna elements of the antenna array are to be identified (e.g., modified, adjusted) in response to the second indication 230. In some aspects, the second indication 230 to modify the activation state of one or more antenna elements can be based on a capability (or lack of such capability) of the first UE 115-a to configure the activation state of one or more antenna elements of the antenna array. Further, the second indication 230 to modify the activation state of one or more antenna elements can be based on one or more parameter values indicative of a structure of the antenna array (e.g., a parameter value indicative of an arrangement of antenna elements, a parameter value indicative of a number of antenna elements, a parameter value indicative of a size of the antenna array, a parameter value indicative of one or more distances between antenna elements).

[0122] In some aspects, the second indication 230 to modify the activation state of one or more antenna elements can include an indication to selectively modify one or more characteristics or components of the one or more antenna elements. The second indication 230 can be for the purpose of beam steering at the first UE 115-a. For example, the second indication 230 can include an indication for the first UE 115-a to modify an LNA metric associated with the one or more antenna elements, a phase shifter metric (e.g., phase, amplitude) associated with the one or more antenna elements, a power level metric associated with the one or more antenna elements, or any combination thereof. For example, the second indication 230 can include an indication for the first UE 115-a to deactivate one or more antenna elements of the antenna array (e.g., reduce a voltage provided to a component of the antenna array, such as a phase shifter). As another example, the second indication 230 can include an indication for the first UE 115-a to taper or attenuate one or more antenna elements of the antenna array. In this example, the second indication 230 can indicate which attenuations are to be performed by the first UE 115-a at each of the one or more antenna elements, and can include a mapping of attenuations to antenna elements, for example as attenuation-antenna element pairs.

[0123] In some aspects, the first UE 115-a can identify an activation state of one or more antenna elements of an antenna array of the first UE 115-a. In some aspects, the first UE 115-a can identify the activation state of the one or more antenna elements based on receiving the second indication 230 for the first UE 115-a to modify the activation state of the one or more antenna elements. For example, upon receiving the second indication 230 for the first UE 115-a to modify the activation state of the one or more antenna elements, the first UE 115-a can identify (e.g., determine, modify, adjust) the activation state of the one or more antenna elements in accordance with (e.g., based on, in response to) the second indication 230. For example, the first UE 115-a can determine (e.g., modify, adjust) a LNA metric associated with the one or more antenna elements, a phase shifter metric associated with the one or more antenna elements, a power level metric (e.g., active state, inactive state) associated with the one or more antenna elements, or any combination thereof based on the second indication 230. For example, the first UE 115-a can modify a voltage provided to one or more components (e.g., phase shifters, LNAs, power amplifiers (PAs), other amplifiers) of the antenna elements of the antenna array. In some aspects, the first UE 115-a can modify the activation of the one or more antenna elements to perform a beam steering.

[0124] Upon receiving the second indication 230 to modify the activation state of the one or more antenna elements, the first UE 115-a can communicate with the base station 105-a using the antenna array in accordance with the identified activation state of the one or more antenna elements. In this regard, the first UE 115-a and the base station 105-a can communicate with one another based on transmitting or receiving the first indication 220, transmitting or receiving the request 225, determining a location of the first UE 115-a and / or the second UE 115-b, determining a communication configuration associated with the first UE 115-a and / or the second UE 115-b, transmitting or receiving the second indication 230, identifying the activation state of the one or more antenna elements, or any combination thereof. For example, the first UE 115-a can receive a downlink transmission 235 from the base station 105-a using the antenna array including the antenna elements including the identified (e.g., modified, adjusted) activation state based on receiving the second indication 230 from the base station 105-a.

[0125] In some aspects, the first UE 115-a and the base station 105-a can additionally or alternatively identify (e.g., modify, adjust) an activation state of antenna elements at the antenna array to perform a transmission (e.g., an uplink transmission) at the first UE 115-a. For example, in some cases, the base station 105-a can transmit an indication to the first UE 115-a regarding a second activation state configured for performing a transmission at the first UE 115-a. In some aspects, the second activation state configured for performing a transmission at the first UE 115-a can be the same as or different from the activation state used to receive downlink transmissions at the first UE 115-a.

[0126] Continuing the same example, the first UE 115-a can identify the second activation state configured for performing a transmission (e.g., an uplink transmission). In some aspects, the first UE 115-a can identify the second activation state based on receiving an indication of the second activation state from the base station 105-a. In some aspects, the first UE 115-a can identify (e.g., modify, adjust) an activation state of one or more antenna elements associated with the second activation state in accordance with (e.g., based on, in response to) the second activation state. For example, the first UE 115-a can determine (e.g., modify, adjust) a LNA metric associated with one or more antenna elements, a phase shifter metric (e.g., phase and / or amplitude) associated with one or more antenna elements, a power level metric (e.g., active state, inactive state) associated with one or more antenna elements, or any combination thereof based on the indication of the second activation state received from the base station 105-a.

[0127] Subsequently, the first UE 115-a can transmit a reference signal (e.g., a sounding reference signal (SRS) or another uplink reference signal) to the base station 105-a in accordance with the second activation state. In this regard, the first UE 115-a can transmit the reference signal based on receiving an indication of the second activation state from the base station 105-a, identifying the second activation state, or both. In some aspects, the base station 105-a can transmit a third indication to the first UE 115-a based on (e.g., in response to) receiving the reference signal from the first UE 115-a. In some aspects, the third indication can include an instruction for the first UE 115-a to modify the second activation state, an instruction for the first UE 115-a to perform an uplink transmission using the second activation state, or both. For example, depending on characteristics (e.g., RSSI, RSRP, RSRQ, SNR, SINR) of the reference signal received from the first UE 115-a and transmitted in accordance with the second activation state, the base station 105-a can determine that the first UE 115-a should perform an uplink transmission using the second activation state and / or should modify the second activation state in order to perform an uplink transmission.

[0128] In some aspects, the first UE 115-a can communicate with the base station 105-a using the antenna array in accordance with a third indication to modify and / or use the second activation state. In this regard, the first UE 115-a and the base station 105-a can communicate with one another based on transmitting or receiving the indication regarding the second activation state, identifying the second activation state, transmitting or receiving the reference signal, transmitting or receiving the third indication to modify or use the second activation state, or any combination thereof. For example, the first UE 115-a can transmit a signal (e.g., an uplink transmission) to the base station 105-a in accordance with the third indication to modify the second activation state, use the second activation state to perform a transmission, or both.

[0129] The techniques described herein can enable a wireless device (e.g., the base station 105-a) to selectively modify activation states of antenna elements of other wireless devices (e.g., the first UE 115-a) based on a structure of the antenna elements and network characteristics. By enabling selective modification of activation states associated with antenna elements based on a structure of the antenna array as well as network characteristics, the techniques described herein can reduce power consumption of the antenna array while also reducing or eliminating interference that can be caused by other power saving techniques.

[0130] Figure 3 An example of a process flow 300 that supports base station reporting of UE antenna selection is shown in accordance with aspects of the present disclosure. In some examples, process flow 300 can implement or be implemented by aspects of wireless communication system 100, wireless communication system 200, or both. For example, process flow 300 can show a first wireless device 305 transmitting a first indication regarding capabilities and antenna array parameters to a second wireless device 310, and identifying activation states of one or more antenna elements based on a second indication received from the second wireless device 310, as described with reference to Figures 1 to 2

[0131] In some cases, process flow 300 can include a first wireless device 305 and a second wireless device 310, which can be examples of the corresponding apparatuses described herein. In particular, the first wireless device 305 can include an example of a UE 115, a first IAB node, or both, and the second wireless device 310 can include an example of a base station 105, a second IAB node, or a second UE 115. For example, Figure 3 The first wireless device 305 shown in Figure 2 may be an example of the first UE 115-a shown in Figure 3 The second wireless device 310 shown in Figure 2 ​The example base station 105-a illustrated in FIG. 1 can be understood in the context of the example wireless communications system 100 illustrated in FIG. 1. However, it can be appreciated that Figure 3 The first wireless device 305 and the second wireless device 310 illustrated in FIG. 3 can include any wireless device known in the art.

[0132] In some examples, the operations illustrated in process flow 300 can be performed by hardware (e.g., including circuitry, processing blocks, logic components, and other components), code (e.g., software or firmware) executed by a processor, or any combination thereof. Alternative examples can be implemented in which some steps are performed in a different order than described or are not performed at all. In some cases, steps can include additional features not mentioned, or further steps can be added.

[0133] At 315, the first wireless device 305 can transmit, to the second wireless device 310, a first indication of a capability of the first wireless device 305 to selectively configure an activation state of one or more antenna elements of an antenna array of the first wireless device 305. In some aspects, the first indication transmitted at 315 can also include an indication of one or more parameter values indicating a structure of the antenna array of the first wireless device. In some aspects, the first indication can be transmitted via a RRC message, a MAC-CE message, a UCI message, a CSI report message, or any combination thereof.

[0134] The one or more parameter values indicating the structure of the antenna array can include, but are not limited to, a parameter value indicating an arrangement of antenna elements within the antenna array, a parameter value indicating a number of antenna elements within the antenna array, a parameter value indicating a size of the antenna array (e.g., a width, a length, other dimension), a parameter value indicating one or more distances between elements of the antenna array (e.g., a separation distance along an x-direction, a separation distance along a y-direction), or any combination thereof. For example, the one or more parameter values can include a parameter value indicating an arrangement of antenna elements within the antenna array, where the one or more parameter values indicate that the antenna array includes a ULA, a URA, a UCA, or any combination thereof.

[0135] In some aspects, the first indication of the capability of the first wireless device 305 to selectively configure the activation state of one or more antenna elements of the antenna array can additionally or alternatively include an indication that an activation state of an antenna element subset of a group of antenna elements of the antenna array cannot be modified. For example, the first indication transmitted at 315 can include an indication that the first wireless device 305 is capable of selectively configuring an activation state of a first antenna element subset of a group of antenna elements of the antenna array, and an indication that the first wireless device 305 is not capable of selectively configuring an activation state of a second antenna element subset of the group of antenna elements of the antenna array.

[0136] At 320, the first wireless device 305 can transmit, to the second wireless device 310, a request for the second wireless device to configure an activation state of one or more antenna elements of an antenna array of the first wireless device 305. In some aspects, the first wireless device 305 can transmit the request at 320 based on transmitting the first indication of capabilities and antenna array parameters at 315. In some cases, the first wireless device 305 can transmit the request in order to reduce power consumption of the antenna array at the first wireless device 305. For example, the first wireless device 305 can receive a command to enter a lower power mode of operation (e.g., an input from a user) and can thereby transmit the request at 320 based on identifying the command.

[0137] In some aspects, the request can include an indication of a number of antenna elements associated with the request, an indication of which antenna elements are associated with the request, or both. For example, the first indication transmitted at 315 can indicate that the antenna array includes ten antenna elements (e.g., antenna elements 1 through 10). In this example, the first wireless device 305 can indicate to the second wireless device 310, via the request, that it wishes to selectively determine or modify the activation state of antenna elements numbered 1, 3, and 7.

[0138] At 325, the second wireless device 310 can determine a location of the first wireless device 305. In some aspects, the second wireless device can additionally determine a location of one or more additional wireless devices (e.g., one or more additional UEs 115 and / or IAB nodes) within a respective wireless communications system. For example, as shown, the base station 105-a (e.g., the second wireless device 310) can determine a location of the first UE 115-a (e.g., the first wireless device 305), a location of the second UE 115-b (e.g., an additional wireless device), or both. In some aspects, the second wireless device 310 can determine a location of the first wireless device 305 relative to other wireless devices within the network, and vice versa. The second wireless device 310 can determine the location of the first wireless device 305 and / or additional wireless devices based on reports received from the network and / or the wireless devices themselves, based on characteristics of signals received from the wireless devices (e.g., RSSI, RSRP, RSRQ), and / or the like. Figure 2

[0139] At 330, the second wireless device 310 can determine a communication configuration associated with the first wireless device 305, an additional wireless device (not shown), or both. The communication configuration can include a configuration or format of resources configured for uplink, downlink, flexible, and / or full-duplex communications at each of the respective wireless devices. For example, as shown, the base station 105-a (e.g., the second wireless device 310) can determine a communication configuration for the first UE 115-a (e.g., the first wireless device 305), a communication configuration for the second UE 115-b (e.g., an additional wireless device), or both. Figure 2 ​As shown, base station 105-a (e.g., second wireless device 310) can determine a first communication configuration for wireless communications at first UE 115-a (e.g., first wireless device 305), a second communication configuration for wireless communications at second UE 115-b (e.g., additional wireless device), or both.

[0140] In some aspects, by determining the location and / or communication configuration of first wireless device 305 and / or the additional wireless device within the network, second wireless device 310 can be configured to estimate a probability and / or severity of interference experienced at the first wireless device caused by signals transmitted by the additional wireless device. For example, in cases where the relative locations of first wireless device 305 and the additional wireless device indicate that first wireless device 305 can be in a position to intercept signals transmitted by the additional wireless device, second wireless device 310 can identify that there is a high probability of interference at first wireless device 305. Additionally or alternatively, second wireless device 310 can identify that there is a high probability of interference at first wireless device 305 based on the communication configurations of first wireless device 305 and the additional wireless device. For example, second wireless device 310 can determine a first communication configuration associated with first wireless device 305 and a second communication configuration associated with the additional wireless device. In this example, second wireless device 310 can identify that there is a high probability of interference at first wireless device 305 based on determining that a set of downlink resources associated with the first communication configuration of first wireless device 305 overlap in the time domain with a set of uplink resources associated with the second communication configuration of the additional wireless device. In these examples, second wireless device 310 can utilize the estimated probability and / or severity of interference at first wireless device 305 to determine an activation state of an antenna element that should be used by first wireless device 305.

[0141] In some cases, the second wireless device 310 can estimate a probability and / or severity of interference experienced at the first wireless device 305 caused by signals transmitted by additional wireless devices based on a report or other signaling received from the first wireless device 305. For example, the first wireless device 305 can identify (e.g., receive) a signal transmitted by an additional wireless device (not shown). In this example, the first wireless device 305 can perform one or more measurements (e.g., RSSI measurements, RSRQ measurements, RSRP measurements, SNR measurements, SINR measurements) on the received signal. Subsequently, the first wireless device 305 can transmit a report (e.g., a measurement report) including an indication (e.g., an indication of the performed measurements) regarding the signal transmitted by the additional wireless device to the second wireless device 310. For example, the first wireless device 305 can transmit a report indicating an RSSI measurement of the received signal. The second wireless device 310 can then estimate a probability and / or severity of interference at the first wireless device 305 to determine an activation state of an antenna element that should be used by the first wireless device 305.

[0142] At 335, the second wireless device 310 can transmit, to the first wireless device, a second indication for the first wireless device 305 to modify an activation state of one or more antenna elements of an antenna array of the first wireless device 305. In some aspects, the second indication can be transmitted via a RRC message, a MAC-CE message, a DCI message, a feedback message in response to a CSI report message, or any combination thereof.

[0143] The second wireless device 310 can transmit the second indication at 335 based on receiving the first indication at 315, receiving the request at 320, determining the location of the first wireless device 305 and / or the additional wireless device at 325, determining the communication configuration associated with the first wireless device 305 and / or the additional wireless device at 330, or any combination thereof. Additionally or alternatively, the second wireless device 310 can transmit the second indication at 335 based on receiving a report (e.g., a measurement report) indicating a signal received by the first wireless device 305 that was transmitted by the additional wireless device.

[0144] In some aspects, the second indication can additionally include an indication of which antenna elements of the antenna array are to be identified (e.g., modified, adjusted) in response to the second indication. In some aspects, the second indication to modify the activation state of one or more antenna elements can be based on a capability (or lack of such capability) of the first wireless device 305 to configure the activation state of one or more antenna elements of the antenna array. Further, the second indication to modify the activation state of one or more antenna elements can be based on one or more parameter values indicative of a structure of the antenna array (e.g., a parameter value indicative of an arrangement of antenna elements, a parameter value indicative of a number of antenna elements, a parameter value indicative of a size of the antenna array, a parameter value indicative of one or more distances between antenna elements).

[0145] In some aspects, the second indication to modify the activation state of one or more antenna elements can include an indication to selectively modify one or more characteristics or components of the one or more antenna elements. For example, the second indication transmitted at 335 can include an indication for the first wireless device 305 to modify an LNA metric associated with the one or more antenna elements, a phase shifter metric (e.g., a phase and / or amplitude of a phase shifter) associated with the one or more antenna elements, a power level metric associated with the one or more antenna elements, or any combination thereof. For example, the second indication transmitted at 335 can include an indication for the first wireless device 305 to deactivate one or more antenna elements of the antenna array. In one example, the second wireless device 310 can determine to modify a tapering of the first wireless device 305, and the second indication to modify the activation state can include an indication (e.g., a report) of which attenuations are to be used by the first wireless device 305 for which antenna elements. The indication can include a mapping between attenuations and antenna elements, for example as attenuation-antenna element pairs.

[0146] At 340, the first wireless device 305 can identify an activation state of one or more antenna elements of the antenna array of the first wireless device 305. In some aspects, the first wireless device 305 can identify the activation state of the one or more antenna elements based on receiving the second indication at 335 for the first wireless device 305 to modify the activation state of the one or more antenna elements.

[0147] For example, upon receiving the second indication for the first wireless device 305 to modify the activation state of the one or more antenna elements at 335, the first wireless device 305 can identify (e.g., determine, modify, adjust) the activation state of the one or more antenna elements in accordance with (e.g., based on, in response to) the second indication. For example, the first wireless device can determine (e.g., modify, adjust) the LNA metric associated with the one or more antenna elements, the phase shifter metric associated with the one or more antenna elements, the power level metric (e.g., active state, inactive state) associated with the one or more antenna elements, or any combination thereof based on the second indication.

[0148] At 345, the first wireless device 305 can communicate with the second wireless device 310 using the antenna array in accordance with the identified activation state of the one or more antenna elements. In this regard, the first wireless device 305 and the second wireless device 310 can communicate with each other based on transmitting or receiving the first indication at 315, transmitting or receiving the request at 320, determining the location of the first wireless device 305 and / or the additional wireless devices at 325, determining the communication configuration associated with the first wireless device 305 and / or the additional wireless devices at 330, transmitting or receiving the second indication at 335, identifying the activation state of the one or more antenna elements at 340, or any combination thereof. For example, the first wireless device 305 can receive a transmission (e.g., a downlink transmission) performed by the second wireless device 310 using the antenna array including the antenna elements comprising the activation state identified (e.g., modified, adjusted) based on the second indication received from the second wireless device 310.

[0149] In some aspects, the first wireless device 305 and the second wireless device 310 can additionally or alternatively identify (e.g., modify, adjust) the activation state of the antenna elements at the antenna array to perform a transmission (e.g., an uplink transmission) at the first wireless device 305. This can be further understood with reference to steps 350-370 of process flow 300.

[0150] At 350, the second wireless device 310 can transmit an indication of a second activation state configured for performing a transmission at the first wireless device 305 to the first wireless device 305. In some aspects, the second activation state configured for performing a transmission at the first wireless device 305 can be the same as or different from the activation state identified at 340. For example, the activation state identified at 340 can be configured for receiving a transmission at the first wireless device 305, and the second activation state received at 350 can be configured for performing a transmission at the first wireless device 305.

[0151] At 355, the first wireless device 305 can identify a second activation state configured for performing a transmission. In some aspects, the first wireless device 305 can identify the second activation state based on receiving the indication of the second activation state at 350. In some aspects, the first wireless device 305 can identify (e.g., modify, adjust) an activation state of one or more antenna elements associated with the second activation state in accordance with (e.g., based on, responsive to) the second activation state. For example, the first wireless device can determine (e.g., modify, adjust) a LNA metric associated with the one or more antenna elements, a phase shifter metric associated with the one or more antenna elements, a power level metric (e.g., active state, inactive state) associated with the one or more antenna elements, or any combination thereof based on the indication of the second activation state received at 350.

[0152] At 360, the first wireless device 305 can transmit a reference signal (e.g., SRS) to the second wireless device in accordance with the second activation state. In this regard, the first wireless device can transmit the reference signal at 360 based on receiving the indication of the second activation state at 350, identifying the second activation state at 355, or both.

[0153] At 365, the second wireless device 310 can transmit a third indication to the first wireless device 305 based on (e.g., responsive to) receiving the reference signal at 360. In some aspects, the third indication can include an instruction for the first wireless device 305 to modify the second activation state, an instruction for the first wireless device 305 to perform a transmission using the second activation state, or both. For example, depending on characteristics (e.g., RSSI, RSRP, RSRQ, SNR, SINR) of the reference signal received at 360 and transmitted in accordance with the second activation state, the second wireless device 310 can determine that the first wireless device 305 should perform a transmission using the second activation state and / or should modify the second activation state in order to perform a transmission.

[0154] At 370, the first wireless device 305 can communicate with the second wireless device 310 using the antenna array in accordance with the third indication received at 365. In this regard, the first wireless device 305 and the second wireless device 310 can communicate with each other based on transmitting or receiving the indication of the second activation state at 350, identifying the second activation state at 355, transmitting or receiving the reference signal at 360, transmitting or receiving the third indication at 365, or any combination thereof. For example, the first wireless device 305 can transmit a signal to the second wireless device in accordance with the third indication to modify the second activation state, to perform a transmission using the second activation state, or both.

[0155] The techniques described herein can enable a wireless device (e.g., second wireless device 310) to selectively modify the activation state of antenna elements of other wireless devices (e.g., first wireless device 305) based on the structure of the antenna elements and network characteristics. By enabling selective modification of the activation state associated with antenna elements based on the structure of the antenna array and network characteristics, the techniques described herein can reduce the power consumption of the antenna array while also reducing or eliminating interference that can be caused by other power saving techniques.

[0156] Figure 4 Apparatus 405 that supports base station reporting for UE antenna selection in accordance with aspects of the present disclosure is shown in block diagram 400. Device 405 can be an example of aspects of a UE 115 as described herein. Device 405 can include receiver 410, communications manager 415, and transmitter 420. Device 405 can also include a processor. Each of these components can be in communication with one another (e.g., via one or more buses).

[0157] Receiver 410 can receive information such as packets, user data, or control information associated with various information channels (e.g., control channels, data channels, and information related to base station reporting for UE antenna selection, etc.). Information can be passed on to other components of the device 405. The receiver 410 can be Figure 7 The described aspects can be implemented in a receiver 410 that is an example of aspects of the described transceiver 720. The receiver 410 can utilize a single antenna or a set of antennas.

[0158] In a context of a first wireless device (e.g., UE, first IAB node) that is to determine (e.g., modify, adjust) an activation state of antenna elements based on signaling received from a second wireless device (e.g., base station, second IAB node), the communications manager 415 can: transmit, to the second wireless device, a first indication of a capability of the first wireless device to selectively configure an activation state of a set of antenna elements of an antenna array of the first wireless device, and one or more parameter values indicating a structure of the antenna array; receive, from the second wireless device in response to the transmitted first indication, a second indication for the first wireless device to modify the activation state of one or more antenna elements of the set of antenna elements; identify the activation state of the one or more antenna elements based on the received second indication; and communicate with the second wireless device using the antenna array in accordance with the identified activation state of the one or more antenna elements.

[0159] In a context of a second wireless device (e.g., a base station, a second IAB node) indicating to a first wireless device (e.g., a UE, a first IAB node) to modify an activation state of an antenna element, the communications manager 415 can receive, from the first wireless device, a first indication of a capability of the first wireless device to selectively configure an activation state of a set of antenna elements of an antenna array of the first wireless device and one or more parameter values indicating a structure of the antenna array, and transmit, to the first wireless device and in response to the received first indication, a second indication for the first wireless device to modify the activation state of one or more antenna elements of the set of antenna elements of the antenna array. The communications manager 415 can be an example of aspects of the communications manager 710 described herein.

[0160] The actions performed by the communications manager 415 as described herein can be implemented to realize one or more potential advantages. For example, the techniques described herein can enable a wireless device (e.g., a base station 105, an IAB node) to selectively modify an activation state of an antenna element of another wireless device (e.g., a UE 115, an IAB node) based on a structure of the antenna element and network characteristics. By enabling selective modification of an activation state associated with an antenna element based on a structure of an antenna array and network characteristics, the techniques described herein can reduce power consumption of an antenna array at a UE 115 while also reducing or eliminating interference that can be caused by other power saving techniques.

[0161] By enabling selective modification of an activation state of an antenna element, a processor of a UE 115 (e.g., a processor controlling the receiver 410, the communications manager 415, the transmitter 420, etc.) can reduce processing resources used for wireless communications. For example, by deactivating one or more antenna elements based on an indication received from another wireless device, processing to operate an antenna array at the UE 115 can be reduced. Further, by selectively adjusting an activation state of an antenna element based on parameters of the antenna array and network characteristics, interference caused by grating lobes (e.g., grating lobe 215 illustrated in FIG. 2) can be reduced, thereby reducing the number of times a processor ramps up processing power and turns on processing units to receive and perform transmissions. Figure 2

[0162] The communications manager 415, or its sub-components, can be implemented in hardware, code (e.g., software or firmware) executed by a processor, or any combination thereof. If implemented in code executed by a processor, the functions of the communications manager 415, or its sub-components can be executed by a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field- programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described in the present disclosure. ​

[0163] The communications manager 415, or its sub-components, can be physically located in various locations, including being distributed so that functions of one or more components are implemented at different physical locations. In some examples, various aspects of the communications manager 415, or its sub-components, can be implemented as part of one or more other hardware components, including but not limited to an input / output (I / O) component, a transceiver, a network server, another computing device, one or more other components described in the present disclosure, or a combination thereof.

[0164] The transmitter 420 can transmit signals generated by other components of the device 405. In some examples, the transmitter 420 can be collocated with a receiver 410 in a transceiver module. For example, the transmitter 420 can be an example of aspects of the transceiver 720 described with reference to FIG. 7. The transmitter 420 can utilize a single antenna or a set of antennas. Figure 7 The transmitter 420 can transmit signals generated by other components of the device 405. In some examples, the transmitter 420 can be collocated with a receiver 410 in a transceiver module. For example, the transmitter 420 can be an example of aspects of the transceiver 720 described with reference to FIG. 7. The transmitter 420 can utilize a single antenna or a set of antennas.

[0165] Figure 5 FIG. 5 shows a block diagram of a device 505 that supports base station reporting for UE antenna selection in accordance with aspects of the present disclosure. The device 505 can be an example of aspects of a device 405 or a UE 115 as described herein. The device 505 can include a receiver 510, a communications manager 515, and a transmitter 550. The device 505 can also include a processor. Each of these components can be in communication with one another (e.g., via one or more buses).

[0166] The receiver 510 can receive information such as packets, user data, or control information associated with various information channels (e.g., control channels, data channels, and information related to base station reporting for UE antenna selection, etc.). Information can be passed on to other components of the device 505. The receiver 510 can be an example of aspects of the transceiver 720 described with reference to FIG. 7. The receiver 510 can utilize a single antenna or a set of antennas. Figure 7 The receiver 510 can receive information such as packets, user data, or control information associated with various information channels (e.g., control channels, data channels, and information related to base station reporting for UE antenna selection, etc.). Information can be passed on to other components of the device 505. The receiver 510 can be an example of aspects of the transceiver 720 described with reference to FIG. 7. The receiver 510 can utilize a single antenna or a set of antennas.

[0167] The communications manager 515 can be an example of aspects of the communications manager 415 as described herein. The communications manager 515 can include a capability transmitting manager 520, an activation state modification receiving manager 525, an activation state manager 530, an antenna array manager 535, a capability receiving manager 540, and an activation state modification transmitting manager 545. The communications manager 515 can be an example of aspects of the communications manager 710 described herein.

[0168] The capability transmitting manager 520 can transmit, to a second wireless device, a first indication of one or more parameter values indicating a structure of an antenna array of the first wireless device and a capability of the first wireless device to selectively configure an activation state of a set of antenna elements of the antenna array.

[0169] The activation state modifying receiving manager 525 can receive, from the second wireless device in response to the transmitted first indication, a second indication for the first wireless device to modify the activation state of one or more antenna elements of the set of antenna elements.

[0170] The activation state manager 530 can identify the activation state of the one or more antenna elements based on the received second indication.

[0171] The antenna array manager 535 can communicate with the second wireless device using the antenna array in accordance with the identified activation state of the one or more antenna elements.

[0172] The capability receiving manager 540 can receive, from a first wireless device, a first indication of one or more parameter values indicating a structure of an antenna array of the first wireless device and a capability of the first wireless device to selectively configure an activation state of a set of antenna elements of the antenna array.

[0173] The activation state modifying transmitting manager 545 can transmit, to the first wireless device in response to the received first indication, a second indication for the first wireless device to modify the activation state of one or more antenna elements of the set of antenna elements of the antenna array.

[0174] The transmitter 550 can transmit signals generated by other components of the device 505. In some examples, the transmitter 550 can be co-located with a receiver 510 in a transceiver module. For example, the transmitter 550 can be an example of aspects of the transceiver 720 described with reference to FIG. 7. The transmitter 550 can utilize a single antenna or a set of antennas. Figure 7 “transmitter.” The transmitter 550 can utilize a single antenna or a set of antennas.

[0175] Figure 6A block diagram 600 of a communications manager 605 that supports base station reporting of UE antenna selection in accordance with aspects of the present disclosure is shown. The communications manager 605 can be an example of aspects of a communications manager 415, a communications manager 515, or a communications manager 710 described herein. The communications manager 605 can include a capability transmitting manager 610, an activation state modification receiving manager 615, an activation state manager 620, an antenna array manager 625, a request transmitting manager 630, a reference signal transmitting manager 635, a signal transmitting manager 640, a signal receiving manager 645, a report transmitting manager 650, a capability receiving manager 655, an activation state modification transmitting manager 660, a wireless device location manager 665, a communication configuration manager 670, a request receiving manager 675, a reference signal receiving manager 680, and a report receiving manager 685. Each of these modules can communicate, directly or indirectly, with one another (e.g., via one or more buses).

[0176] The capability transmitting manager 610 can transmit, to a second wireless device, a capability to selectively configure an activation state of a set of antenna elements of an antenna array of the first wireless device, and a first indication of one or more parameter values indicating a structure of the antenna array. In some cases, the first indication is transmitted via a RRC message, a MAC-CE message, a UCI message, a CSI report message, or any combination thereof.

[0177] In some examples, the capability transmitting manager 610 can transmit one or more of a first parameter value indicating an arrangement of antenna elements within the antenna array, a second parameter value indicating a number of antenna elements within the antenna array, a third parameter value indicating a size of the antenna array, or a fourth parameter value indicating one or more distances between antenna elements of the antenna array, where receiving the second indication is based on one or more of the first parameter value, the second parameter value, the third parameter value, or the fourth parameter value. In some cases, the first parameter value indicating the arrangement of antenna elements within the antenna array includes an indication of a ULA, a URA, a UCA, or any combination thereof.

[0178] In some examples, the capability transmitting manager 610 can transmit, to the second wireless device, an indication that an activation state of a subset of antenna elements of the set of antenna elements cannot be modified, where receiving the second indication is based on transmitting the indication that the activation state of the subset of antenna elements cannot be modified.

[0179] In some cases, the first wireless device includes a UE, a first integrated access and backhaul node, or both, and where the second wireless device includes a base station, a second integrated access and backhaul node, or both.

[0180] The activation state modification receiving manager 615 can receive, from the second wireless device, a second indication for the first wireless device to modify an activation state of one or more antenna elements of the set of antenna elements in response to the transmitted first indication. In some examples, the activation state modification receiving manager 615 can receive an indication to modify a LNA metric associated with the one or more antenna elements, a phase shifter metric associated with the one or more antenna elements, a power level metric associated with the one or more antenna elements, or any combination thereof. In some examples, the activation state modification receiving manager 615 can receive an indication to deactivate the one or more antenna elements.

[0181] In some examples, the activation state modification receiving manager 615 can receive, from the second wireless device, a third indication to modify the second activation state, to perform the transmission using the second activation state, or both based on transmitting the reference signal. In some examples, the activation state modification receiving manager 615 can receive, from the second wireless device, an indication of the second activation state configured for performing the transmission, where transmitting the reference signal according to the second activation state is based on receiving the indication of the second activation state.

[0182] In some cases, the second indication is received via a RRC message, a MAC-CE message, a DCI message, a feedback message in response to a CSI report message, or any combination thereof.

[0183] The activation state manager 620 can identify an activation state of the one or more antenna elements based on the received second indication. In some examples, the activation state manager 620 can identify a second activation state of the set of antenna elements of the antenna array, the second activation state configured for performing the transmission.

[0184] The antenna array manager 625 can communicate with the second wireless device using the antenna array according to the identified activation state of the one or more antenna elements. In some examples, the antenna array manager 625 can communicate with the first wireless device based on the transmitted second indication to adjust the activation state of the one or more antenna elements.

[0185] The capability reception manager 655 can receive, from the first wireless device, an indication of one or more parameter values indicating a structure of an antenna array of the first wireless device, a capability of the first wireless device to selectively configure an activation state of a set of antenna elements of the antenna array, or any combination thereof. In some examples, the capability reception manager 655 can receive a first parameter value indicating an arrangement of antenna elements within the antenna array, a second parameter value indicating a number of antenna elements within the antenna array, a third parameter value indicating a size of the antenna array, or a fourth parameter value indicating one or more distances between antenna elements of the antenna array, where transmitting the second indication is based on one or more of the first, second, third, or fourth parameter values. In some cases, the first parameter value indicating the arrangement of antenna elements within the antenna array includes an indication of a ULA, a URA, a UCA, or any combination thereof.

[0186] In some examples, the capability reception manager 655 can receive, from the first wireless device, an indication that an activation state of a subset of antenna elements of the set of antenna elements cannot be modified, where transmitting the second indication is based on receiving the indication that the activation state of the subset of antenna elements cannot be modified.

[0187] The activation state modification transmission manager 660 can transmit, to the first wireless device in response to the received first indication, a second indication for the first wireless device to modify an activation state of one or more antenna elements of the set of antenna elements of the antenna array. In some examples, the activation state modification transmission manager 660 can transmit an indication to modify a LNA metric associated with the one or more antenna elements, a phase shifter metric associated with the one or more antenna elements, a power level metric associated with the one or more antenna elements, or any combination thereof. In some examples, the activation state modification transmission manager 660 can transmit an indication to deactivate the one or more antenna elements.

[0188] In some examples, the activation state modification transmission manager 660 can transmit, to the first wireless device, an indication of a second activation state of the set of antenna elements of the antenna array, the second activation state configured for performing a transmission at the first wireless device. In some examples, the activation state modification transmission manager 660 can transmit, to the first wireless device in response to receiving the reference signal, a third indication to modify the second activation state, to perform the transmission using the second activation state, or both.

[0189] The request transmission manager 630 can transmit, to the second wireless device, a request for the second wireless device to configure an activation state of one or more antenna elements, where the second indication is received based on transmitting the request. In some cases, the request indicates a number of antenna elements associated with the request, indicates that the request is associated with the one or more antenna elements, or both.

[0190] The reference signal transmission manager 635 can transmit, to the second wireless device, a reference signal in accordance with the second activation state.

[0191] The signal transmission manager 640 can transmit, to the second wireless device, a signal in accordance with a third indication to modify the second activation state, use the second activation state to perform a transmission, or both.

[0192] The signal reception manager 645 can identify a signal transmitted by the third wireless device. In some examples, the signal reception manager 645 can receive the signal from the first wireless device in accordance with a third indication to modify the second activation state, use the second activation state to perform a transmission, or both.

[0193] The report transmission manager 650 can transmit, to the second wireless device, a report including an indication regarding the signal transmitted by the third wireless device, where receiving the second indication to modify the activation state of the one or more antenna elements of the set of antenna elements of the antenna array is based on transmitting the report.

[0194] The wireless device position manager 665 can determine a position of the first wireless device, a position of the third wireless device, or both, where transmitting the second indication is based on the determined position of the first wireless device, the determined position of the third wireless device, or both.

[0195] The communication configuration manager 670 can determine a first communication configuration for wireless communications at the first wireless device, a second communication configuration for wireless communications at the third wireless device, or both, where transmitting the second indication is based on the determined first communication configuration, the determined second communication configuration, or both.

[0196] The request reception manager 675 can receive, from the first wireless device, a request for the second wireless device to configure an activation state of one or more antenna elements, where transmitting the second indication is based on receiving the request. In some cases, the request includes an indication of a number of antenna elements associated with the request, an indication that the request is associated with one or more antenna elements, or both.

[0197] The reference signal reception manager 680 can receive, from the first wireless device, a reference signal based on transmitting the indication of the second activation state.

[0198] The report reception manager 685 can receive, from the first wireless device, a report including an indication regarding a signal transmitted by the third wireless device and received by the first wireless device, where transmitting the second indication to modify the activation state of the one or more antenna elements of the set of antenna elements of the antenna array is based on receiving the report.

[0199] Figure 7 A diagram illustrates a system 700 including an apparatus 705 that supports base station reporting for UE antenna selection in accordance with aspects of the present disclosure. The apparatus 705 can be an example of or include the components of apparatus 405, apparatus 505, or a UE 115 as described herein. The apparatus 705 can include components for bi-directional voice and data communications including components for transmitting and receiving communications, including a communications manager 710, an I / O controller 715, a transceiver 720, an antenna 725, memory 730, and a processor 740. These components can be in electronic communication via one or more buses (e.g., bus 745).

[0200] The communications manager 710 can transmit, to a second wireless device, a first indication of a capability of the first wireless device to selectively configure activation states of a set of antenna elements of an antenna array of the first wireless device and one or more parameter values indicating a structure of the antenna array, receive, from the second wireless device, a second indication for the first wireless device to modify the activation states of one or more antenna elements of the set of antenna elements in response to the transmitted first indication, identify the activation states of the one or more antenna elements based on the received second indication, and communicate with the second wireless device using the antenna array in accordance with the identified activation states of the one or more antenna elements. The communications manager 710 can also receive, from a first wireless device, a first indication of a capability of the first wireless device to selectively configure activation states of a set of antenna elements of an antenna array of the first wireless device and one or more parameter values indicating a structure of the antenna array, and transmit, to the first wireless device, a second indication for the first wireless device to modify the activation states of one or more antenna elements of the set of antenna elements in response to the received first indication.

[0201] The I / O controller 715 can manage input and output signals for the device 705. The I / O controller 715 can also manage peripherals not integrated into the device 705. In some cases, the I / O controller 715 can represent a physical connection or port to or another known operating system. In other cases, the I / O controller 715 can represent or interact with a modem, a keyboard, a mouse, a touchscreen, or similar devices. In some cases, the I / O controller 715 can be implemented as part of a processor. In some cases, a user can interact with the device 705 via the I / O controller 715 or via hardware components controlled by the I / O controller 715.

[0202] The transceiver 720 can communicate with one or more antennas, wired, or wireless links via which the device can receive information and provide information to other devices. For example, the transceiver 720 can represent a wireless transceiver and can communicate with another wireless transceiver. The transceiver 720 can also include a modem to modulate the packets and provide the modulated packets to the antennas for transmission, and to demodulate packets received from the antennas.

[0203] In some cases, the wireless device can include a single antenna 725. However, in some cases the device can have more than one antenna 725, which can be capable of concurrently transmitting or receiving multiple wireless transmissions.

[0204] The memory 730 can include random access memory (RAM) and read-only memory (ROM). The memory 730 can store computer-readable, computer-executable code 735 including instructions that, when executed, cause the processor to perform various functions described herein. In some cases, the memory 730 can contain, among other computer-readable or computer- executable instructions, a basic I / O system (BIOS), which can control basic hardware or software operation such as the interaction with peripheral components or devices.

[0205] The processor 740 can include an intelligent hardware device, (e.g., a general- purpose processor, a DSP, a central processing unit (CPU), a microcontroller, an ASIC, an FPGA, a programmable logic device, a discrete gate or transistor logic component, a discrete hardware component, or any combination thereof). In some cases, the processor 740 can be configured to operate a memory array. In other cases, a memory controller can be integrated into the processor 740. The processor 740 can be configured to execute computer-readable instructions stored in a memory (e.g., the memory 730) to cause the device 705 to perform various functions (e.g., functions or tasks for supporting UE antenna selection’s base station reporting).

[0206] The code 735 can include instructions to implement aspects of the present disclosure, including instructions to support wireless communications. The code 735 can be stored in a non-transitory computer-readable medium such as system memory or other type of memory. In some cases, the code 735 can not be directly executable by the processor 740 but can cause a computer (e.g., when compiled and executed) to perform functions described herein.

[0207] Figure 8 A flow diagram illustrating a method 800 that supports UE antenna selection’s base station reporting in accordance with aspects of the present disclosure is shown. The operations of method 800 can be implemented by a UE 115 or its components as described herein. For example, the operations of method 800 can be performed by a UE 115 as described with reference to FIGs. 1-2, 4, and 5. Figures 4 to 7The described communication manager performs. In some examples, the UE can execute a set of instructions to control its functional elements to perform the functions described below. Additionally or alternatively, the UE can perform various aspects of the functions described below using special-purpose hardware.

[0208] At 805, the UE can transmit, to a second wireless device, a first indication of a capability of the first wireless device to selectively configure an activation state of a set of antenna elements of an antenna array of the first wireless device and one or more parameter values indicating a structure of the antenna array, the one or more parameter values being associated with one or more characteristics of beams formable by the antenna array. The operations of 805 can be performed according to the methods described herein. In some examples, aspects of the operations of 805 can be performed by a PRS transmission manager as described with reference to Figures 4 to 7 FIG. 9 shows a diagram of a system including a device 905 that establishes a connection with a base station, in accordance with aspects of the present disclosure. Device 905 can be an example of one or more aspects of device 500, 600, or 700 described herein. Device 905 can establish a connection with a base station 910. Device 905 can include components for bi-directional communication with base station 910 via one or more antennas 915, 920. In some aspects, antennas 915, 920 can be co-located or located at different physical locations.

[0209] At 810, the UE can receive, from the second wireless device in response to the transmitted first indication, a second indication for the first wireless device to modify the activation state of one or more antenna elements of the set of antenna elements. The operations of 810 can be performed according to the methods described herein. In some examples, aspects of the operations of 810 can be performed by an activation state modification reception manager as described with reference to Figures 4 to 7 FIG. 9 shows a diagram of a system including a device 905 that establishes a connection with a base station, in accordance with aspects of the present disclosure. Device 905 can be an example of one or more aspects of device 500, 600, or 700 described herein. Device 905 can establish a connection with a base station 910. Device 905 can include components for bi-directional communication with base station 910 via one or more antennas 915, 920. In some aspects, antennas 915, 920 can be co-located or located at different physical locations.

[0210] At 815, the UE can identify the activation state of the one or more antenna elements based on the received second indication. The operations of 815 can be performed according to the methods described herein. In some examples, aspects of the operations of 815 can be performed by an activation state manager as described with reference to Figures 4 to 7 FIG. 9 shows a diagram of a system including a device 905 that establishes a connection with a base station, in accordance with aspects of the present disclosure. Device 905 can be an example of one or more aspects of device 500, 600, or 700 described herein. Device 905 can establish a connection with a base station 910. Device 905 can include components for bi-directional communication with base station 910 via one or more antennas 915, 920. In some aspects, antennas 915, 920 can be co-located or located at different physical locations.

[0211] At 820, the UE can communicate with the second wireless device using the antenna array in accordance with the identified activation state of the one or more antenna elements. The operations of 820 can be performed according to the methods described herein. In some examples, aspects of the operations of 820 can be performed by an antenna array manager as described with reference to Figures 4 to 7 FIG. 9 shows a diagram of a system including a device 905 that establishes a connection with a base station, in accordance with aspects of the present disclosure. Device 905 can be an example of one or more aspects of device 500, 600, or 700 described herein. Device 905 can establish a connection with a base station 910. Device 905 can include components for bi-directional communication with base station 910 via one or more antennas 915, 920. In some aspects, antennas 915, 920 can be co-located or located at different physical locations.

[0212] Figure 9 FIG. 9 shows a diagram of a system including a device 905 that establishes a connection with a base station, in accordance with aspects of the present disclosure. Device 905 can be an example of one or more aspects of device 500, 600, or 700 described herein. Device 905 can establish a connection with a base station 910. Device 905 can include components for bi-directional communication with base station 910 via one or more antennas 915, 920. In some aspects, antennas 915, 920 can be co-located or located at different physical locations. Figures 4 to 7 The described communication manager performs. In some examples, the UE can execute a set of instructions to control its functional elements to perform the functions described below. Additionally or alternatively, the UE can perform various aspects of the functions described below using special-purpose hardware.

[0213] At 905, the UE can transmit to the second wireless device the ability to selectively configure the activation state of a set of antenna elements of the antenna array of the first wireless device, and a first indication of one or more parameter values ​​indicating the structure of the antenna array, said one or more parameter values ​​being associated with one or more characteristics of the beam that the antenna array can form. Operation of 905 can be performed according to the methods described herein. In some examples, aspects of the operation of 905 can be determined by reference to... Figures 4 to 7 The described capability transfer manager is used to execute this.

[0214] At point 910, the UE may transmit a request to the second radio device to configure the activation state of one or more antenna elements. The operation of point 910 can be performed according to the methods described herein. In some examples, aspects of the operation of point 910 may be determined by reference to... Figures 4 to 7 The described capability transfer manager is used to execute this.

[0215] At 915, the UE can receive from the second radio device a second indication in response to the transmitted first indication, for the first radio device to modify the activation state of one or more antenna elements in the group of antenna elements, wherein the second indication is received based on the transmission of the request. Operation of 915 can be performed according to the methods described herein. In some examples, aspects of the operation of 915 can be derived from references... Figures 4 to 7 The described activation status is modified by the receiver manager to execute.

[0216] At 920, the UE can identify the activation state of one or more antenna elements based on the received second indication. The operation of 920 can be performed according to the method described herein. In some examples, aspects of the operation of 920 can be derived from references... Figures 4 to 7 The described activation state manager is used to execute.

[0217] At 925, the UE can communicate with a second wireless device using an antenna array based on the activation state of one or more identified antenna elements. Operation of 925 can be performed according to the methods described herein. In some examples, aspects of operation of 925 can be derived from references... Figures 4 to 7 The antenna array manager described is used to perform this.

[0218] Figure 10 A flowchart illustrating a method 1000 for reporting base station antenna selection supporting a UE according to various aspects of this disclosure is shown. Operation of method 1000 can be implemented by a UE 115 or its components as described herein. For example, operation of method 1000 can be implemented by, as referred to... Figures 4 to 7The described communication manager performs. In some examples, the UE can execute a set of instructions to control its functional elements to perform the functions described below. Additionally or alternatively, the UE can perform various aspects of the functions described below using special-purpose hardware.

[0219] At 1005, the UE can transmit, to a second wireless device, a first indication of a capability of the first wireless device to selectively configure activation states of a set of antenna elements of an antenna array of the first wireless device and one or more parameter values indicating a structure of the antenna array, the one or more parameter values being associated with one or more characteristics of beams formable by the antenna array. The operations of 1005 can be performed according to the methods described herein. In some examples, aspects of the operations of 1005 can be performed by a capability transmitting manager as described with reference to Figures 4 to 7 FIG. 15.

[0220] At 1010, the UE can transmit, to the second wireless device, an indication that activation states of a subset of antenna elements of the set of antenna elements cannot be modified. The operations of 1010 can be performed according to the methods described herein. In some examples, aspects of the operations of 1010 can be performed by a capability transmitting manager as described with reference to Figures 4 to 7 FIG. 15.

[0221] At 1015, the UE can receive, from the second wireless device in response to the transmitted first indication, a second indication for the first wireless device to modify activation states of one or more antenna elements of the set of antenna elements, wherein the second indication is received based on transmitting the indication that the activation states of the subset of antenna elements cannot be modified. The operations of 1015 can be performed according to the methods described herein. In some examples, aspects of the operations of 1015 can be performed by an activation state modification receiving manager as described with reference to Figures 4 to 7 FIG. 15.

[0222] At 1020, the UE can identify the activation states of the one or more antenna elements based on the received second indication. The operations of 1020 can be performed according to the methods described herein. In some examples, aspects of the operations of 1020 can be performed by an activation state manager as described with reference to Figures 4 to 7 FIG. 15.

[0223] At 1025, the UE can communicate with the second wireless device using the antenna array in accordance with the identified activation states of the one or more antenna elements. The operations of 1025 can be performed according to the methods described herein. In some examples, aspects of the operations of 1025 can be performed by an antenna array manager as described with reference to Figures 4 to 7 FIG. 15.

[0224] Figure 11A flow diagram illustrating a method 1100 that supports base station reporting for UE antenna selection is shown, in accordance with aspects of the present disclosure. The operations of method 1100 can be implemented by a UE 115 or its components as described herein. For example, the operations of method 1100 can be performed by a communications manager as described with reference to Figures 4 to 7 FIGS. 10 through 13 show box diagrams of example aspects of a communications manager 1005 that supports base station reporting for UE antenna selection in accordance with aspects of the present disclosure. The communications manager 1005 can be an example of the communications manager 915 described with reference to FIG. 9.

[0225] At 1105, the UE can receive, from a first wireless device, a first indication of a capability of the first wireless device to selectively configure activation states of a set of antenna elements of an antenna array of the first wireless device and one or more parameter values indicating a structure of the antenna array, the one or more parameter values being associated with one or more characteristics of beams formable by the antenna array. The operations of 1105 can be performed according to the methods described herein. In some examples, aspects of the operations of 1105 can be performed by a capability reception manager as described with reference to Figures 4 to 7 FIGS. 10 through 13 show box diagrams of example aspects of a communications manager 1005 that supports base station reporting for UE antenna selection in accordance with aspects of the present disclosure. The communications manager 1005 can be an example of the communications manager 915 described with reference to FIG. 9.

[0226] At 1110, the UE can transmit, to the first wireless device in response to the received first indication, a second indication for the first wireless device to modify the activation states of one or more antenna elements of the set of antenna elements of the antenna array. The operations of 1110 can be performed according to the methods described herein. In some examples, aspects of the operations of 1110 can be performed by an activation state modification transmission manager as described with reference to Figures 4 to 7 FIGS. 10 through 13 show box diagrams of example aspects of a communications manager 1005 that supports base station reporting for UE antenna selection in accordance with aspects of the present disclosure. The communications manager 1005 can be an example of the communications manager 915 described with reference to FIG. 9.

[0227] implementations, and that the operations and / or steps can be rearranged or otherwise modified and that other implementations are possible. Further, aspects from two or more of the methods can be combined.

[0228] The following provides an overview of aspects of the disclosure:

[0229] Aspect 1 : A method for wireless communications at a first wireless device, comprising: transmitting, to a second wireless device, a first indication of a capability of the first wireless device to selectively configure activation states of a plurality of antenna elements of an antenna array of the first wireless device and one or more parameter values indicative of a structure of the antenna array, the one or more parameter values being associated with one or more characteristics of beams that the antenna array can form; receiving, from the second wireless device and in response to the transmitted first indication, a second indication for the first wireless device to modify an activation state of one or more antenna elements of the plurality of antenna elements; identifying the activation state of the one or more antenna elements based at least in part on the received second indication; and communicating with the second wireless device using the antenna array in accordance with the identified activation state of the one or more antenna elements.

[0230] Aspect 2: The method of Aspect 1, further comprising: transmitting, to the second wireless device, a request for the second wireless device to configure the activation state of the one or more antenna elements, wherein the second indication is received based at least in part on transmitting the request.

[0231] Aspect 3: The method of Aspect 2, wherein the request indicates a number of antenna elements associated with the request, indicates that the request is associated with the one or more antenna elements, or both.

[0232] Aspect 4: The method of claim 1, wherein transmitting the first indication of the one or more parameter values indicative of a structure of the antenna array comprises transmitting a first parameter value indicative of an arrangement of antenna elements within the antenna array, a second parameter value indicative of a number of antenna elements within the antenna array, or both, wherein receiving the second indication is based at least in part on the first parameter value, the second parameter value, or both.

[0233] Aspect 5: The method of Aspect 4, wherein the first parameter value indicative of an arrangement of antenna elements within the antenna array comprises an indication of a ULA, a URA, a UCA, or any combination thereof.

[0234] Aspect 6: The method of any of Aspects 1-5, wherein transmitting the first indication of the one or more parameter values indicative of a structure of the antenna array comprises transmitting a first parameter value associated with a supported phase or amplitude of one or more phase shifters of the antenna array, a second parameter value indicative of a size of the antenna array, a third parameter value indicative of one or more distances between antenna elements of the antenna array, or any combination thereof, wherein receiving the second indication is based at least in part on the first parameter value, the second parameter value, the third parameter value, or any combination thereof.

[0235] Aspect 7: The method of any one of aspects 1-6, further comprising: transmitting, to the second wireless device, an indication that an activation state of a subset of antenna elements of the plurality of antenna elements cannot be modified, wherein receiving the second indication is based at least in part on transmitting the indication that the activation state of the subset of antenna elements cannot be modified.

[0236] Aspect 8: The method of any one of aspects 1-7, wherein receiving the second indication to modify the activation state of the one or more antenna elements comprises: receiving an indication to modify a LNA metric associated with the one or more antenna elements, a phase shifter metric associated with the one or more antenna elements, a power level metric associated with the one or more antenna elements, or any combination thereof.

[0237] Aspect 9: The method of any one of aspects 1-8, wherein receiving the second indication to modify the activation state of the one or more antenna elements comprises: receiving an indication to deactivate the one or more antenna elements.

[0238] Aspect 10: The method of any one of aspects 1-9, wherein the first indication is transmitted via a radio resource control message, a MAC-CE message, a UCI message, a CSI report message, or any combination thereof.

[0239] Aspect 11: The method of any one of aspects 1-10, wherein the second indication is received via a radio resource control message, a MAC-CE message, a DCI message, a feedback message in response to a CSI report message, or any combination thereof.

[0240] Aspect 12: The method of any one of aspects 1-11, further comprising: identifying a second activation state of a plurality of antenna elements of the antenna array, the second activation state configured for performing transmissions; transmitting, to the second wireless device, a reference signal in accordance with the second activation state; and receiving, from the second wireless device, a third indication to modify the second activation state, to perform transmissions using the second activation state, or both based at least in part on transmitting the reference signal.

[0241] Aspect 13: The method of aspect 12, further comprising: transmitting, to the second wireless device, a signal in accordance with the third indication to modify the second activation state, to perform transmissions using the second activation state, or both.

[0242] Aspect 14: The method of any one of Aspects 12-13, further comprising: receiving, from the second wireless device, an indication of the second active state configured for performing transmissions, wherein transmitting the reference signal according to the second active state is based at least in part on receiving the indication of the second active state.

[0243] Aspect 15: The method of any one of Aspects 1-14, further comprising: identifying a signal transmitted by a third wireless device; and transmitting, to the second wireless device, a report comprising an indication of the signal transmitted by the third wireless device, wherein receiving the second indication to modify the active state of one or more antenna elements of the plurality of antenna elements of the antenna array is based at least in part on transmitting the report.

[0244] Aspect 16: The method of any one of Aspects 1-15, wherein the first wireless device comprises a UE, a first IAB node, or both, and the second wireless device comprises a base station, a second IAB node, or both.

[0245] Aspect 17: The method of any one of Aspects 1-16, wherein the one or more characteristics of a beam formable by the antenna array comprise an orientation of a main beam, an orientation of an unintended lobe, a size or shape of a main beam, a size or shape of an unintended lobe, or any combination thereof.

[0246] Aspect 18: A method of wireless communication at a second wireless device, comprising: receiving, from a first wireless device, a first indication of a capability of the first wireless device to selectively configure an active state of a plurality of antenna elements of an antenna array of the first wireless device, and one or more parameter values indicative of a structure of the antenna array, the one or more parameter values being associated with one or more characteristics of a beam formable by the antenna array; and transmitting, to the first wireless device in response to the received first indication, a second indication for the first wireless device to modify the active state of one or more antenna elements of the plurality of antenna elements of the antenna array.

[0247] Aspect 19: The method of Aspect 18, further comprising: determining a location of the first wireless device, a location of a third wireless device, or both, wherein transmitting the second indication is based at least in part on the determined location of the first wireless device, the determined location of the third wireless device, or both.

[0248] Aspect 20: The method of any of aspects 18 through 19, further comprising: determining a first communication configuration for wireless communications at the first wireless device, a second communication configuration for wireless communications at a third wireless device, or both, wherein transmitting the second indication is based at least in part on the determined first communication configuration, the determined second communication configuration, or both.

[0249] Aspect 21 : The method of any of aspects 18 through 20, further comprising: communicating with the first wireless device to adjust the activation state of the one or more antenna elements based at least in part on the transmitted second indication.

[0250] Aspect 22: The method of any of aspects 18 through 21, further comprising: receiving a request from the first wireless device to configure the activation state of the one or more antenna elements by the second wireless device, wherein transmitting the second indication is based at least in part on receiving the request.

[0251] Aspect 23: The method of any of aspects 18 through 22, wherein receiving the first indication indicating the one or more parameter values of the structure of the antenna array comprises: receiving one or more of a first parameter value indicating an arrangement of antenna elements within the antenna array, a second parameter value indicating a number of antenna elements within the antenna array, a third parameter value indicating a size of the antenna array, or a fourth parameter value indicating one or more distances between antenna elements of the antenna array, wherein transmitting the second indication is based at least in part on one or more of the first parameter value, the second parameter value, the third parameter value, or the fourth parameter value.

[0252] Aspect 24: The method of any of aspects 18 through 23, further comprising: receiving an indication from the first wireless device that an activation state of a subset of antenna elements of the plurality of antenna elements cannot be modified, wherein transmitting the second indication is based at least in part on receiving the indication that the activation state of the subset of antenna elements cannot be modified.

[0253] Aspect 25: The method of any of aspects 18 through 24, wherein transmitting the second indication to modify the activation state of the one or more antenna elements comprises: transmitting an indication to modify a LNA metric associated with the one or more antenna elements, a phase shifter metric associated with the one or more antenna elements, a power level metric associated with the one or more antenna elements, or any combination thereof.

[0254] Aspect 26: The method of any of aspects 18 through 25, wherein transmitting the second indication to modify the activation state of the one or more antenna elements comprises transmitting an indication to deactivate the one or more antenna elements.

[0255] Aspect 27: The method of any of aspects 18 through 26, further comprising: transmitting, to the first wireless device, an indication of a second activation state of a plurality of antenna elements of the antenna array, the second activation state configured for performing transmissions at the first wireless device; receiving, from the first wireless device, a reference signal based at least in part on transmitting the indication of the second activation state; and transmitting, to the first wireless device, a third indication to modify the second activation state, to perform transmissions using the second activation state, or both, in response to receiving the reference signal.

[0256] Aspect 28: The method of any of aspects 18 through 27, further comprising: receiving, from the first wireless device, a report comprising an indication of a signal transmitted by a third wireless device and received by the first wireless device, wherein transmitting the second indication to modify the activation state of one or more antenna elements of a plurality of antenna elements of the antenna array is based at least in part on receiving the report.

[0257] Aspect 29: An apparatus for wireless communication at a first wireless device, comprising a processor; memory coupled with the processor; and instructions stored in the memory and executable by the processor to cause the apparatus to perform the method of any of aspects 1 through 17.

[0258] Aspect 30: An apparatus for wireless communication at a first wireless device, comprising at least one means for performing the method of any of aspects 1 through 17.

[0259] Aspect 31: A non-transitory computer-readable medium storing code for wireless communication at a first wireless device, the code comprising instructions executable by a processor to perform the method of any of aspects 1 through 17.

[0260] Aspect 32: An apparatus, comprising a processor; memory coupled with the processor; and instructions stored in the memory and executable by the processor to cause the apparatus to perform the method of any of aspects 18 through 28.

[0261] Aspect 33: An apparatus, comprising at least one means for performing the method of any of aspects 18 through 28.

[0262] Aspect 34: A non-transitory computer-readable medium storing code, the code comprising instructions executable by a processor to perform the method of any of aspects 18 through 28.

[0263] Although aspects of an LTE, LTE-A, LTE-A Pro, or NR system can be described with reference to the techniques described herein, aspects of an LTE, LTE-A, LTE-A Pro, or NR system can employ the techniques described herein to facilitate wireless communication. The techniques described herein can be used for various wireless communication systems such as a 3rd Generation Partnership Project (3GPP) system, a 5G NR system, or other wireless communication systems. A LTE, LTE-A, LTE-A Pro, or NR system can utilize wireless communication

[0264] Information and signals described herein can be represented using any of a variety of different technologies and techniques. For example, data, instructions, commands, information, signals, bits, symbols, and chips that can be referenced throughout the description can be represented by voltages, currents, electromagnetic waves, magnetic fields or particles, optical fields or particles, or any combination thereof.

[0265] The various illustrative blocks and components described herein can be implemented or performed with a general-purpose processor, a DSP, an ASIC, a CPU, a FPGA or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described herein. A general-purpose processor can be a microprocessor, but in the alternative, the processor can be any processor, controller, microcontroller, or state machine. A processor can also be implemented as a combination of computing devices (e.g., a combination of a DSP and a microprocessor, multiple microprocessors, one or more microprocessors in conjunction with a DSP core, or any other such configuration).

[0266] The functions described herein can be implemented in hardware, software executed by a processor, firmware, or any combination thereof. If implemented in software executed by a processor, the functions can be stored on or transmitted over as one or more instructions or code on a computer-readable medium. Other examples and implementations are within the scope of the disclosure and appended claims. For example, due to the nature of software, functions described herein can be implemented using software executed by a processor, hardware, firmware, hardwiring, or combinations thereof. Features implementing functions can also be physically located at various positions, including being distributed such that portions of functions are implemented at different physical locations.

[0267] Computer-readable media includes both non-transitory computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another. A non-transitory storage medium can be any available medium that can be accessed by a general purpose or special purpose computer. By way of example, and not limitation, non-transitory computer-readable media can include RAM, ROM, electrically erasable programmable ROM (EEPROM), flash memory, compact disk (CD) ROM or other optical disk storage, magnetic disk storage or other magnetic storage devices, or any other non-transitory medium that can be used to carry or store desired program code means in the form of instructions or data structures and that can be accessed by a general-purpose or special-purpose computer, or a general-purpose or special-purpose processor. Also, any connection is properly termed a computer-readable medium. For example, if the software is transmitted from a website, server, or other remote source using a coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), or wireless technologies such as infrared, radio, and microwave, then the coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, radio, and microwave are included in the definition of computer-readable medium. Disk and disc, as used herein, include CD, laser disc, optical disc, digital versatile disc (DVD), floppy disk and Blu-ray disc where disks usually reproduce data magnetically, while discs reproduce data optically with lasers. Combinations of the above are also included within the scope of computer-readable media.

[0268] As used herein, including in the claims “or” as used in a list of items (for example, a list of items prefaced by a phrase such as “at least one of’ or “one or more of’) indicates an inclusive list such that, for example, a list of at least one of A, B, or C means A or B or C or AB or AC or BC or ABC (i.e., A and B and C). Also, as used herein, the phrase “based on” shall not be construed as a reference to a closed set of conditions. For example, an example step that is described as “based on condition A” can be based on both a condition A and a condition B without departing from the scope of the present disclosure. In other words, as used herein, the phrase “based on” shall be construed in the same manner as the phrase “based at least in part on.”

[0269] In the drawings, like reference numerals refer to items of like functionality. Moreover, the various components of the embodiments can be used alone or in combination, and each component can be used with or without the presence of other components. It is intended that changes and modifications can be made by persons of ordinary skill in the art, which changes and modifications are both material and immaterial, together with claims of patent protection based thereon.

[0270] The description set forth herein with respect to the appended drawings describes example configurations and is not intended to represent the only examples or the only structures in which the claims can be practiced. The term "example" is used only to provide an example, illustration, or description, and not to imply superiority or inferiority of other examples. The detailed description includes specific details to provide a thorough understanding of the described techniques. However, techniques can be practiced without these specific details. In some instances, well-known structures and devices are shown in block diagram form to avoid obscuring the concepts of the described examples.

[0271] The description herein is presented to enable any person skilled in the art to make or use the disclosure. Various modifications to the disclosure will be readily apparent to those skilled in the art, and the generic principles defined herein can be applied to other variations without departing from the scope of the disclosure. Thus, the disclosure is not to be limited to the examples and designs described herein but is to be accorded the broadest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for wireless communications at a first wireless device, comprising: transmitting, to a second wireless device, a first indication of a capability of the first wireless device to selectively configure activation states of a plurality of antenna elements of an antenna array of the first wireless device and one or more parameter values indicative of a structure of the antenna array, the one or more parameter values being associated with one or more characteristics of beams that the antenna array can form, wherein the one or more parameter values indicate that the antenna array comprises a uniform linear array (ULA), a uniform rectangular array (URA), a uniform circular array (UCA), or any combination thereof; receiving, from the second wireless device and in response to the transmitted first indication, a second indication for the first wireless device to modify an activation state of one or more antenna elements of the plurality of antenna elements; identifying the activation state of the one or more antenna elements based at least in part on the received second indication; and communicating with the second wireless device using the antenna array in accordance with the identified activation state of the one or more antenna elements.

2. The method of claim 1, further comprising: transmitting, to the second wireless device, a request for the second wireless device to configure the activation state of the one or more antenna elements, wherein the second indication is received based at least in part on transmitting the request. the request indicates a number of antenna elements associated with the request, indicates that the request is associated with the one or more antenna elements, or both.

3. The method of claim 2, wherein, transmitting the first indication of the one or more parameter values indicative of the structure of the antenna array comprises:

4. The method of claim 1, wherein, transmitting a first parameter value indicative of an arrangement of antenna elements within the antenna array, a second parameter value indicative of a number of antenna elements within the antenna array, or both, wherein receiving the second indication is based at least in part on the first parameter value, the second parameter value, or both. transmitting the first indication of the one or more parameter values indicative of the structure of the antenna array comprises:

5. The method of claim 1, wherein, transmitting a first parameter value associated with a supported phase or amplitude of one or more phase shifters of the antenna array, a second parameter value indicative of a size of the antenna array, a third parameter value indicative of one or more distances between antenna elements of the antenna array, or any combination thereof, wherein receiving the second indication is based at least in part on the first parameter value, the second parameter value, the third parameter value, or any combination thereof.

6. The method of claim 1, further comprising: transmitting, to the second wireless device, an indication that activation states of a subset of antenna elements of the plurality of antenna elements cannot be modified, wherein receiving the second indication is based at least in part on transmitting the indication that the activation states of the subset of antenna elements cannot be modified. receiving the second indication to modify the activation state of the one or more antenna elements comprises:

7. The method of claim 1, wherein, ​ receiving an indication to modify a low noise amplifier metric associated with the one or more antenna elements, a phase shifter metric associated with the one or more antenna elements, a power level metric associated with the one or more antenna elements, or any combination thereof.

8. The method of claim 1, wherein, receiving the second indication to modify the activation state of the one or more antenna elements comprises: receiving an indication to deactivate the one or more antenna elements.

9. The method of claim 1, wherein, the first indication is transmitted via a radio resource control message, a medium access control-control element message, an uplink control information message, a channel state information report message, or any combination thereof.

10. The method of claim 1, wherein, the second indication is received via a radio resource control message, a medium access control-control element message, a downlink control information message, a feedback message in response to a channel state information report message, or any combination thereof.

11. The method of claim 1, further comprising: identifying a second activation state of a plurality of antenna elements of the antenna array, the second activation state configured for performing transmissions; transmitting, to the second wireless device, a reference signal in accordance with the second activation state; and receiving, from the second wireless device, a third indication to modify the second activation state, to perform transmissions using the second activation state, or both based at least in part on transmitting the reference signal.

12. The method of claim 11, further comprising: transmitting, to the second wireless device, a signal in accordance with the third indication to modify the second activation state, to perform transmissions using the second activation state, or both.

13. The method of claim 11, further comprising: receiving, from the second wireless device, an indication of the second activation state configured for performing transmissions, wherein transmitting the reference signal in accordance with the second activation state is based at least in part on receiving the indication of the second activation state.

14. The method of claim 1, further comprising: identifying a signal transmitted by a third wireless device; and transmitting, to the second wireless device, a report comprising an indication of the signal transmitted by the third wireless device, wherein receiving the second indication to modify the activation state of one or more of a plurality of antenna elements of the antenna array is based at least in part on transmitting the report.

15. The method of claim 1, wherein, the first wireless device comprises a user equipment (UE), a first integrated access and backhaul node, or both, and wherein the second wireless device comprises a base station, a second integrated access and backhaul node, or both.

16. The method of claim 1, wherein, the one or more characteristics of a beam formable by the antenna array comprise an orientation of a main beam, an orientation of an unintended lobe, a size or shape of a main beam, a size or shape of an unintended lobe, or any combination thereof.

17. A method of wireless communication at a second wireless device, the method comprising: receiving, from a first wireless device, a first indication of a capability of the first wireless device to selectively configure an activation state of a plurality of antenna elements of an antenna array of the first wireless device and one or more parameter values indicative of a structure of the antenna array, the one or more parameter values being associated with one or more characteristics of a beam that the antenna array is capable of forming, wherein the one or more parameter values indicate that the antenna array comprises a uniform linear array (ULA), a uniform rectangular array (URA), a uniform circular array (UCA), or any combination thereof; and transmitting, to the first wireless device in response to the received first indication, a second indication for the first wireless device to modify the activation state of one or more antenna elements of the plurality of antenna elements of the antenna array.

18. The method of claim 17, further comprising: determining a location of the first wireless device, a location of a third wireless device, or both, wherein transmitting the second indication is based at least in part on the determined location of the first wireless device, the determined location of the third wireless device, or both.

19. The method of claim 17, further comprising: determining a first communication configuration for wireless communication at the first wireless device, a second communication configuration for wireless communication at a third wireless device, or both, wherein transmitting the second indication is based at least in part on the determined first communication configuration, the determined second communication configuration, or both.

20. The method of claim 17, further comprising: communicating with the first wireless device to adjust the activation state of the one or more antenna elements based at least in part on the transmitted second indication.

21. The method of claim 17, further comprising: receiving, from the first wireless device, a request for the second wireless device to configure the activation state of the one or more antenna elements, wherein the second indication is transmitted based at least in part on receiving the request.

22. The method of claim 17, wherein, receiving the first indication of the one or more parameter values indicative of a structure of the antenna array comprises: receiving one or more of a first parameter value indicative of an arrangement of antenna elements within the antenna array, a second parameter value indicative of a number of antenna elements within the antenna array, a third parameter value indicative of a size of the antenna array, or a fourth parameter value indicative of one or more distances between antenna elements of the antenna array, wherein transmitting the second indication is based at least in part on the one or more of the first parameter value, the second parameter value, the third parameter value, or the fourth parameter value.

23. The method of claim 17, further comprising: receiving, from the first wireless device, an indication that an activation state of a subset of antenna elements of the plurality of antenna elements cannot be modified, wherein transmitting the second indication is based at least in part on receiving the indication that the activation state of the subset of antenna elements cannot be modified.

24. The method of claim 17, wherein, transmitting the second indication for modifying the activation state of the one or more antenna elements comprises: transmitting an indication to modify a low noise amplifier metric associated with the one or more antenna elements, a phase shifter metric associated with the one or more antenna elements, a power level metric associated with the one or more antenna elements, or any combination thereof.

25. The method of claim 17, wherein, transmitting the second indication to modify the activation state of the one or more antenna elements includes: transmitting an indication to deactivate the one or more antenna elements.

26. The method of claim 17, further comprising: transmitting, to the first wireless device, an indication of a second activation state of a plurality of antenna elements of the antenna array, the second activation state configured for performing transmissions at the first wireless device; receiving, from the first wireless device, a reference signal based at least in part on transmitting the indication of the second activation state; and transmitting, to the first wireless device, a third indication to modify the second activation state, to perform transmissions using the second activation state, or both, in response to receiving the reference signal.

27. The method of claim 17, further comprising: receiving, from the first wireless device, a report including an indication of a signal transmitted by a third wireless device and received by the first wireless device, wherein transmitting the second indication to modify the activation state of one or more antenna elements of a plurality of antenna elements of the antenna array is based at least in part on receiving the report.

28. An apparatus for wireless communication at a first wireless device, the apparatus comprising: a processor, memory coupled with the processor; and instructions stored in the memory, the instructions being executable by the processor to cause the apparatus to: transmit, to a second wireless device, a first indication of a capability of the first wireless device to selectively configure an activation state of a plurality of antenna elements of an antenna array of the first wireless device, and one or more parameter values indicating a structure of the antenna array, the one or more parameter values being associated with one or more characteristics of a beam that the antenna array is capable of forming, wherein the one or more parameter values indicate that the antenna array comprises a uniform linear array (ULA), a uniform rectangular array (URA), a uniform circular array (UCA), or any combination thereof; receive, from the second wireless device in response to the transmitted first indication, a second indication for the first wireless device to modify an activation state of one or more antenna elements of the plurality of antenna elements; identify the activation state of the one or more antenna elements based at least in part on the received second indication; and communicate with the second wireless device using the antenna array in accordance with the identified activation state of the one or more antenna elements. the instructions are further executable by the processor to cause the apparatus to: transmit, to the second wireless device, a request for the second wireless device to configure the activation state of the one or more antenna elements, wherein the second indication is received based at least in part on transmitting the request.

29. The apparatus of claim 28, wherein, ​ ​ 30. The apparatus of claim 29, wherein, The request indicates a number of antenna elements associated with the request, indicates that the request is associated with the one or more antenna elements, or both.

31. The apparatus of claim 28, wherein, The instructions to transmit the first indication can be executed by the processor to cause the apparatus to: transmit a first parameter value indicating an arrangement of antenna elements within the antenna array, a second parameter value indicating a number of antenna elements within the antenna array, or both, where receiving the second indication is based at least in part on the first parameter value, the second parameter value, or both.

32. The apparatus of claim 28, wherein, The instructions to transmit the first indication can be executed by the processor to cause the apparatus to: transmit a first parameter value associated with a supported phase or amplitude of one or more phase shifters of the antenna array, a second parameter value indicating a size of the antenna array, a third parameter value indicating one or more distances between antenna elements of the antenna array, or any combination thereof, where receiving the second indication is based at least in part on the first parameter value, the second parameter value, the third parameter value, or any combination thereof.

33. The apparatus of claim 28, wherein, The instructions can be further executed by the processor to cause the apparatus to: transmit, to the second wireless device, an indication that an activation state of a subset of antenna elements of the plurality of antenna elements cannot be modified, where receiving the second indication is based at least in part on transmitting the indication that the activation state of the subset of antenna elements cannot be modified.

34. The apparatus of claim 28, wherein, The instructions to receive the second indication can be executed by the processor to cause the apparatus to: receive an indication to modify a low noise amplifier metric associated with the one or more antenna elements, a phase shifter metric associated with the one or more antenna elements, a power level metric associated with the one or more antenna elements, or any combination thereof.

35. The apparatus of claim 28, wherein, The instructions to receive the second indication can be executed by the processor to cause the apparatus to: receive an indication to deactivate the one or more antenna elements.

36. The apparatus of claim 28, wherein, The first indication is transmitted via a radio resource control message, a medium access control-control element message, an uplink control information message, a channel state information report message, or any combination thereof.

37. The apparatus of claim 28, wherein, The second indication is received via a radio resource control message, a medium access control-control element message, a downlink control information message, a feedback message in response to a channel state information report message, or any combination thereof.

38. The apparatus of claim 28, wherein, The instructions can be further executed by the processor to cause the apparatus to: identify a second activation state of a plurality of antenna elements of the antenna array, the second activation state configured for performing transmissions; transmit, to the second wireless device, a reference signal in accordance with the second activation state; and receive, from the second wireless device, a third indication to modify the second activation state, perform transmissions using the second activation state, or both, based at least in part on transmitting the reference signal.

39. The apparatus of claim 38, wherein, The instructions can be further executed by the processor to cause the apparatus to: transmit, to the second wireless device, a signal in accordance with the third indication to modify the second activation state, perform transmissions using the second activation state, or both.

40. The apparatus of claim 38, wherein, The instructions can be further executable by the processor to cause the apparatus to: receive, from the second wireless device, an indication of the second active state configured for performing transmissions, wherein transmitting the reference signal according to the second active state is based at least in part on receiving the indication of the second active state.

41. The apparatus of claim 28, wherein, The instructions can be further executable by the processor to cause the apparatus to: identify a signal transmitted by a third wireless device; and transmit, to the second wireless device, a report including an indication of the signal transmitted by the third wireless device, wherein receiving the second indication to modify the active state of one or more antenna elements of the plurality of antenna elements of the antenna array is based at least in part on transmitting the report.

42. The apparatus of claim 28, wherein, The first wireless device comprises a user equipment (UE), a first integrated access and backhaul node, or both, and wherein the second wireless device comprises a base station, a second integrated access and backhaul node, or both.

43. The apparatus of claim 28, wherein, The one or more characteristics of a beam formable by the antenna array comprise an orientation of a main beam, an orientation of an unintended lobe, a size or shape of a main beam, a size or shape of an unintended lobe, or any combination thereof.

44. An apparatus for wireless communication at a second wireless device, the apparatus comprising: a processor, memory coupled with the processor; and instructions stored in the memory, the instructions being executable by the processor to cause the apparatus to: receive, from a first wireless device, a first indication of a capability of the first wireless device to selectively configure an active state of a plurality of antenna elements of an antenna array of the first wireless device, and one or more parameter values indicating a structure of the antenna array, the one or more parameter values being associated with one or more characteristics of a beam formable by the antenna array, wherein the one or more parameter values indicate that the antenna array comprises a uniform linear array (ULA), a uniform rectangular array (URA), a uniform circular array (UCA), or any combination thereof; and transmit, to the first wireless device in response to the received first indication, a second indication for the first wireless device to modify the active state of one or more antenna elements of the plurality of antenna elements of the antenna array.

45. The apparatus of claim 44, wherein, The instructions can be further executable by the processor to cause the apparatus to: determine a location of the first wireless device, a location of a third wireless device, or both, wherein transmitting the second indication is based at least in part on the determined location of the first wireless device, the determined location of the third wireless device, or both.

46. The apparatus of claim 44, wherein, The instructions can be further executable by the processor to cause the apparatus to: determine a first communication configuration for wireless communication at the first wireless device, a second communication configuration for wireless communication at a third wireless device, or both, wherein transmitting the second indication is based at least in part on the determined first communication configuration, the determined second communication configuration, or both.

47. The apparatus of claim 44, wherein, The instructions can be further executable by the processor to cause the apparatus to: communicate, with the first wireless device, based at least in part on the transmitted second indication, to adjust the active state of the one or more antenna elements.

48. The apparatus of claim 44, wherein, The instructions can be further executable by the processor to cause the apparatus to: receive, from the first wireless device, a request for the second wireless device to configure an activation state of the one or more antenna elements, wherein the second indication is transmitted based at least in part on receiving the request.

49. The apparatus of claim 44, wherein, The instructions to receive the first indication can be executable by the processor to cause the apparatus to: receive one or more of a first parameter value indicating an arrangement of antenna elements within the antenna array, a second parameter value indicating a number of antenna elements within the antenna array, a third parameter value indicating a size of the antenna array, or a fourth parameter indicating one or more distances between antenna elements of the antenna array, wherein transmitting the second indication is based at least in part on the one or more of the first parameter value, the second parameter value, the third parameter value, or the fourth parameter value.

50. The apparatus of claim 44, wherein, The instructions can be further executable by the processor to cause the apparatus to: receive, from the first wireless device, an indication that an activation state of a subset of antenna elements of the plurality of antenna elements cannot be modified, wherein transmitting the second indication is based at least in part on receiving the indication that the activation state of the subset of antenna elements cannot be modified.

51. The apparatus of claim 44, wherein, The instructions to transmit the second indication can be executable by the processor to cause the apparatus to: transmit an indication to modify a low noise amplifier metric associated with the one or more antenna elements, a phase shifter metric associated with the one or more antenna elements, a power level metric associated with the one or more antenna elements, or any combination thereof.

52. The apparatus of claim 44, wherein, The instructions to transmit the second indication can be executable by the processor to cause the apparatus to: transmit an indication to deactivate the one or more antenna elements.

53. The apparatus of claim 44, wherein, The instructions can be further executable by the processor to cause the apparatus to: transmit, to the first wireless device, an indication of a second activation state of a plurality of antenna elements of the antenna array, the second activation state being configured for performing a transmission at the first wireless device; receive, from the first wireless device, a reference signal based at least in part on transmitting the indication of the second activation state; and in response to receiving the reference signal, transmit, to the first wireless device, a third indication to modify the second activation state, to perform a transmission using the second activation state, or both. The instructions can be further executable by the processor to cause the apparatus to:

54. The apparatus of claim 44, wherein, receive, from the first wireless device, a report including an indication of a signal transmitted by a third wireless device and received by the first wireless device, wherein transmitting the second indication to modify an activation state of one or more antenna elements of a plurality of antenna elements of the antenna array is based at least in part on receiving the report. ​

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