Patent Description:
These systems may employ 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 spread orthogonal frequency division multiplexing (DFT-s-OFDM). A wireless multiple-access communications system may include one or more base stations or one or more network access nodes, each simultaneously supporting communication for multiple communication devices, which may be otherwise known as user equipment (UE).

3GPP Tdoc R1-<NUM> proposes to support dynamic indicating the panel/beam of PUCCH through UL-TCI, where UL-TCI is explicitly carried in DL grant, or implicitly conveyed through TCI of PDCCH/PDSCH.

3GPP Tdoc R1-<NUM> proposes that unless RAN4 indicates otherwise, RAN1 assumes panel-specific Pcmax,b,f,c for multiple UE-panel transmission, which is defined separately for each UE transmitting panel based on Rel-<NUM> specifications.

<CIT> discloses that a base station may use the preconfigured minimum number of antenna sub-arrays (K1) and/or the indicated capabilities of the UE (e.g., N and/or K2) to determine how many antenna sub-arrays the UE may not have monitored when performing the initial acquisition procedure.

3GPP Tdoc R1-<NUM> proposes extending a single-panel dual-stage codebook to multi-panel case considering the following two alternatives: Alt1: The PUSCH transmission is restricted to one panel where antenna panel selection is either configured or reported by the UE. The codebook for the selected panel is the dual-stage single-panel codebook. Alt <NUM>: The PUSCH transmission is joint from all antenna panels. The agreed DL multi-panel codebook or its simple extension to UL can be used.

<CIT> proposes that a pilot for a first antenna transmit port (port <NUM>) can be transmitted in a subcarrier and a pilot for a second antenna transmit port (port <NUM>) can be transmitted in a different subcarrier. This allows the UE to estimate phase noise for multiple ports. The different antenna ports may transmit data on the subcarriers <NUM> using spatial multiplexing and/or FDM.

Advantageous embodiments are subject to the dependent claims.

In the following, each of the described methods, apparatuses, systems, examples and aspects, which does not fully correspond to the invention as defined in the appended claims, is thus not according to the invention and is, as well as the whole following description, present for illustration purposes only or to highlight specific aspects or features of the appended claims.

In some deployments, wireless communications systems may operate in millimeter wave (mmW) frequency ranges (e.g., <NUM>, <NUM>, <NUM>, <NUM>, <NUM>-<NUM>, etc.). Wireless communications at these frequencies may be associated with increased signal attenuation (e.g., path loss, penetration loss, blockage loss), which may be influenced by various factors, such as diffraction, propagation environment, density of blockages, material properties, etc. As a result, signal processing techniques, such as beamforming, may be used to coherently combine energy and overcome the path losses at these frequencies. Due to the increased amount of path, penetration and blockage losses in mmW communications systems, transmissions between wireless devices (e.g., from a base station and/or a UE) may be beamformed. Moreover, a receiving device may use beamforming techniques to configure antenna(s) and/or antenna array(s) and/or antenna array module(s) such that transmissions are received in a directional manner.

In some deployments, communications in mmW frequencies may utilize what is referred to as frequency range <NUM> (FR2), corresponding to deployments in <NUM>-<NUM> (e.g., <NUM>. <NUM>, <NUM>, <NUM>, etc.). As demand for wireless communications increases, additional mmW frequencies may be desirable for some deployments, such as frequency range <NUM> (FR4) (also informally known as upper mmW bands) which may be associated with <NUM> and beyond. In many FR2 deployments, wireless devices use antenna modules that include a number of antenna elements, such as an array of four antenna elements per module in a 4x1 array arrangement, among other example configurations. Upper mmW bands have shorter wavelengths, and thus more antenna elements can be placed in the same physical aperture in FR4 than at FR2. For example, an FR4 device may have multiple antenna modules that each contain four 4x4 subarrays. In some cases, it may be easier for a wireless device (e.g., a UE) to use or manage some possible combinations of antenna elements across subarrays within an antenna module or across antenna modules than others.

Various aspects of the present disclosure provide that a wireless device may provide indications to one or more other wireless devices related to control parameters of one or more selected sets of antenna elements. For example, a first wireless device having a number of antenna modules that each have one or more sub-arrays of antenna elements may select a number of different sets of antenna elements for use in communications with a second wireless device, where the number of different sets can be substantially smaller than the total number of possible combinations of antenna elements. The first wireless device may determine one or more transmission control parameters for one or more of the sets of antenna elements based on a number of antenna elements in the particular set of antenna elements. The first wireless device may communicate with the second wireless device, using one or more of the sets of antenna elements (e.g., using a first set of antenna elements for receiving communications, and a second set of antenna elements for transmitting communications), using the determined transmission control parameters.

In some cases, the first wireless device may provide the one or more transmission control parameters to the second wireless device, for use in the communications with the first wireless device. The transmission control parameters may include, for example, an array size of one or more sets of antenna elements, an array geometry of the one or more sets of antenna elements, a beam pattern of the one or more sets of antenna elements, or any combinations thereof. With different sets of antenna groups, a digital beamforming codebook used for communications between the first wireless device and second wireless device may be configured specific to the particular set of antennas that is used for communications. Further, for power control, a maximum transmittable power at the first wireless device (e.g., Pcmax) may be dependent on the set of antenna elements used in communications due to, for example, effective isotropic radiated power (EIRP) limitations that may apply at the first wireless device, and different array sizes may lead to different array gains and thus impact Pcmax. Alternatively, for a given Pcmax, different antenna array configurations may lead to different maximum allowed array gains and thus different levels of minimum allowed beamwidths from the antenna arrays. Additionally, MCS-dependent phase noise compensation may be dependent upon antenna array sizes used. The transmission control parameters may provide information related to Pcmax, array information, or combinations thereof, that may be used to determine a MCS for communications, a digital beamforming codebook, MCS-dependent phase noise compensation, or any combinations thereof, based on a number of antenna elements of the group of antenna elements that are to be used for communications.

Such techniques may be useful to indicate preferred groups of antenna elements and associated parameters, for use in transmitting and receiving beamformed communications. For example, an antenna group size of an antenna group to be used for communications may result in a particular Pcmax, which transmitting wireless device may indicate to a receiving wireless device for use in setting one or more parameters for a communication (e.g., a MCS for a communication). Additionally or alternatively, different antenna group sizes, geometries, or beam patterns may have different digital beamforming codebooks, and thus an indication of the antenna group size, geometry, and/or beam pattern may be used for selecting a digital beamforming codebook. Thus, providing indications of transmission control parameters may allow for communications to be configured to provide enhanced efficiency and reliability, while allowing a wireless device to select particular group of antenna elements that may be preferred at the wireless device (e.g., to reduce power consumption, manage thermal overheads associated with different radio frequency components, manage which antenna arrays or modules are active, etc.).

Aspects of the disclosure are initially described in the context of wireless communications systems. Examples of antenna modules and groups of antenna elements are then discussed for some aspects. Aspects of the disclosure are further illustrated by and described with reference to apparatus diagrams, system diagrams, and flowcharts that relate to antenna group-specific parameter configuration in millimeter wave communications.

<FIG> illustrates an example of a wireless communications system <NUM> that supports antenna group-specific parameter configuration in millimeter wave communications in accordance with one or more aspects of the present disclosure. The wireless communications system <NUM> may include one or more base stations <NUM>, one or more UEs <NUM>, and a core network <NUM>. In some examples, the wireless communications system <NUM> may be an LTE network, an LTE-A network, an LTE-A Pro network, or a New Radio (NR) network. In some examples, the wireless communications system <NUM> may 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.

The UEs <NUM> described herein may be able to communicate with various types of devices, such as other UEs <NUM>, the base stations <NUM>, or network equipment (e.g., core network nodes, relay devices, repeater devices, CPE, IAB nodes, router devices, or other network equipment), as shown in <FIG>.

The base stations <NUM> may communicate with the core network <NUM>, or with one another, or both. For example, the base stations <NUM> may interface with the core network <NUM> through one or more backhaul links <NUM> (e.g., via an S1, N2, N3, or other interface). The base stations <NUM> may communicate with one another over the backhaul links <NUM> (e.g., via an X2, Xn, or other interface) either directly (e.g., directly between base stations <NUM>), or indirectly (e.g., via core network <NUM>), or both. In some examples, the backhaul links <NUM> may be or include one or more wireless links. In some examples, the one or more base stations <NUM> may provide backhaul connectivity between another base station <NUM> and core network <NUM> via a backhaul link <NUM> while acting as an IAB node. A UE <NUM> may communicate with the core network <NUM> through a communication link <NUM>.

The UEs <NUM> described herein may be able to communicate with various types of devices, such as other UEs <NUM> that may sometimes act as relays, routers, or CPE, as well as the base stations <NUM> and the network equipment including macro eNBs or gNBs, small cell eNBs or gNBs, IAB nodes, or relay base stations, among other examples, as shown in <FIG>.

The communication links <NUM> shown in the wireless communications system <NUM> may include uplink transmissions from a UE <NUM> to a base station <NUM>, or downlink transmissions from a base station <NUM> to a UE <NUM>. Carriers may carry downlink or uplink communications (e.g., in an FDD mode) or may be configured to carry downlink and uplink communications (e.g., in a TDD mode).

For example, the carrier bandwidth may be one of a number of determined bandwidths for carriers of a particular radio access technology (e.g., <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, or <NUM> megahertz (MHz)). Devices of the wireless communications system <NUM> (e.g., the base stations <NUM>, the UEs <NUM>, or both) may have hardware configurations that support communications over a particular carrier bandwidth or may be configurable to support communications over one of a set of carrier bandwidths. In some examples, the wireless communications system <NUM> may include base stations <NUM> or UEs <NUM> that support simultaneous communications via carriers associated with multiple carrier bandwidths. In some examples, each served UE <NUM> may be configured for operating over portions (e.g., a sub-band, a BWP) or all of a carrier bandwidth.

The electromagnetic spectrum is often subdivided, based on frequency/wavelength, into various classes, bands, channels, etc. In <NUM> NR two initial operating bands have been identified as frequency range designations FR1 (<NUM> - <NUM>) and FR2 (<NUM> - <NUM>). It should be understood that although a portion of FR1 is greater than <NUM>, FR1 is often referred to (interchangeably) as a "Sub-<NUM>" band in various documents and articles.

Signal waveforms transmitted over a carrier may be made up of multiple subcarriers (e.g., using multi-carrier modulation (MCM) techniques such as orthogonal frequency division multiplexing (OFDM) or DFT-S-OFDM).

The time intervals for the base stations <NUM> or the UEs <NUM> may be expressed in multiples of a basic time unit which may, for example, refer to a sampling period of Ts = <NUM>/(Δfmax · Nf) seconds, where Δfmax may represent the maximum supported subcarrier spacing, and Nf may represent the maximum supported discrete Fourier transform (DFT) size. Time intervals of a communications resource may be organized according to radio frames each having a specified duration (e.g., <NUM> milliseconds (ms)). Each radio frame may be identified by a system frame number (SFN) (e.g., ranging from <NUM> to <NUM>).

A subframe, a slot, a mini-slot, or a symbol may be the smallest scheduling unit (e.g., in the time domain) of the wireless communications system <NUM> and may 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) may be variable. Additionally or alternatively, the smallest scheduling unit of the wireless communications system <NUM> may be dynamically selected (e.g., in bursts of shortened TTIs (sTTIs)).

Some UEs <NUM>, such as MTC or IoT devices, may be low cost or low complexity devices and may provide for automated communication between machines (e.g., via Machine-to-Machine (M2M) communication). In some examples, M2M communication or MTC may include communications from devices that integrate sensors or meters to measure or capture information and relay such information to a central server or application program that makes use of the information or presents the information to humans interacting with the application program. Some UEs <NUM> may be designed to collect information or enable automated behavior of machines or other devices.

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

The core network <NUM> may be an evolved packet core (EPC) or <NUM> core (5GC), which may 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 may manage non-access stratum (NAS) functions such as mobility, authentication, and bearer management for the UEs <NUM> served by the base stations <NUM> associated with the core network <NUM>. User IP packets may be transferred through the user plane entity, which may provide IP address allocation as well as other functions. The user plane entity may be connected to the network operators IP services <NUM>. The operators IP services <NUM> may include access to the Internet, Intranet(s), an IP Multimedia Subsystem (IMS), or a Packet-Switched Streaming Service.

The wireless communications system <NUM> may operate using one or more frequency bands, sometimes in the range of <NUM> megahertz (MHz) to <NUM> gigahertz (GHz). Oftentimes, the region from <NUM> to <NUM> is known as the ultra-high frequency (UHF) region or decimeter band because the wavelengths range from approximately one decimeter to one meter in length. The UHF waves may be blocked or redirected by buildings and environmental features, but the waves may penetrate structures sufficiently for a macro cell to provide service to the UEs <NUM> located indoors. The transmission of UHF waves may be associated with smaller antennas and shorter ranges (e.g., less than <NUM> 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 <NUM>.

The wireless communications system <NUM> may also operate in a super high frequency (SHF) region using frequency bands from <NUM> to <NUM>, also known as the centimeter band, or in an EHF region of the spectrum (e.g., from <NUM> to <NUM>), also known as the millimeter band. In some examples, the wireless communications system <NUM> may support millimeter wave (mmW) communications between the UEs <NUM> and the base stations <NUM>, and EHF antennas of the respective devices may be smaller and more closely spaced than UHF antennas. In some examples, this may facilitate use of antenna arrays within a device. The propagation of EHF transmissions, however, may be subject to even greater atmospheric attenuation and shorter range than SHF or UHF transmissions. The techniques disclosed herein may be employed across transmissions that use one or more different frequency regions, and designated use of bands across these frequency regions may differ by country or regulating body.

A base station <NUM> or a UE <NUM> may be equipped with multiple antennas, which may 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 <NUM> or a UE <NUM> may be located within one or more antenna arrays or antenna panels, which may support MIMO operations or transmit or receive beamforming. In some examples, antennas or antenna arrays associated with a base station <NUM> may be located in diverse geographic locations. Additionally or alternatively, an antenna panel may support radio frequency beamforming for a signal transmitted via an antenna port.

The base stations <NUM> or the UEs <NUM> may use MIMO communications to exploit multipath signal propagation and increase the spectral efficiency by transmitting or receiving multiple signals via different spatial layers. Such techniques may be referred to as spatial multiplexing. Each of the multiple signals may be referred to as a separate spatial stream and may carry bits associated with the same data stream (e.g., the same codeword) or different data streams (e.g., different codewords). MIMO techniques include single-user MIMO (SU-MIMO), where multiple spatial layers are transmitted to the same receiving device, and multiple-user MIMO (MU-MIMO), where multiple spatial layers are transmitted to multiple devices.

A base station <NUM> or a UE <NUM> may use beam sweeping techniques as part of beam forming operations. For example, a base station <NUM> may use multiple antennas or antenna arrays (e.g., antenna panels) to conduct beamforming operations for directional communications with a UE <NUM>. Some signals (e.g., synchronization signals, reference signals, beam selection signals, or other control signals) may be transmitted by a base station <NUM> multiple times in different directions. For example, the base station <NUM> may transmit a signal according to different beamforming weight sets associated with different directions of transmission. Transmissions in different beam directions may be used to identify (e.g., by a transmitting device, such as a base station <NUM>, or by a receiving device, such as a UE <NUM>) a beam direction for later transmission or reception by the base station <NUM>.

Some signals, such as data signals associated with a particular receiving device, may be transmitted by a base station <NUM> in a single beam direction (e.g., a direction associated with the receiving device, such as a UE <NUM>). In some examples, the beam direction associated with transmissions along a single beam direction may be determined based on a signal that was transmitted in one or more beam directions. For example, a UE <NUM> may receive one or more of the signals transmitted by the base station <NUM> in different directions and may report to the base station <NUM> an indication of the signal that the UE <NUM> received with a highest signal quality or an otherwise acceptable signal quality.

In some examples, transmissions by a device (e.g., by a base station <NUM> or a UE <NUM>) may be performed using multiple beam directions, and the device may use a combination of digital precoding or radio frequency beamforming to generate a combined beam for transmission (e.g., from a base station <NUM> to a UE <NUM>). The UE <NUM> may report feedback that indicates precoding weights for one or more beam directions, and the feedback may correspond to a configured number of beams across a system bandwidth or one or more sub-bands. The base station <NUM> may transmit a reference signal (e.g., a cell-specific reference signal (CRS), or a channel state information reference signal (CSI-RS)), which may be precoded or unprecoded, or both. The UE <NUM> may provide feedback for beam selection, which may 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 <NUM>, a UE <NUM> may employ similar techniques for transmitting signals multiple times in different directions (e.g., for identifying a beam direction for subsequent transmission or reception by the UE <NUM>) or for transmitting a signal in a single direction (e.g., for transmitting data to a receiving device).

A receiving device (e.g., a UE <NUM>) may try multiple receive configurations (e.g., directional listening) when receiving various signals from the base station <NUM>, such as synchronization signals, reference signals, beam selection signals, or other control signals. For example, a receiving device may try multiple receive directions by receiving via different antenna subarrays, by processing received signals according to different antenna subarrays, by receiving according to different receive beamforming weight sets (e.g., different directional listening weight sets) applied to signals received at multiple antenna elements of an antenna array, or by processing received signals according to different receive beamforming weight sets applied to signals received at multiple antenna elements of an antenna array, any of which may be referred to as "listening" according to different receive configurations or receive directions. In some examples, a receiving device may use a single receive configuration to receive along a single beam direction (e.g., when receiving a data signal). The single receive configuration may be aligned in a beam direction determined based on listening according to different receive configuration directions (e.g., a beam direction determined to have a highest signal strength, highest signal-to-noise ratio (SNR), or otherwise acceptable signal quality based on listening according to multiple beam directions).

UEs <NUM> may include one or more antenna modules that may include a relatively large number of antenna elements for mmW communications, and may be an example of a first wireless device as discussed herein. A UE communications manager <NUM> may manage mmW communications, and in some cases may receive signaling indicating one or more different groups of antenna elements from one or more antenna modules that are preferred for use at the UE <NUM>. The UE communications manager <NUM> may provide an indication of one or more transmission control parameters to a second wireless device, such as a base station <NUM>. The transmission control parameters may indicate, for example, power control parameters that may be dependent upon the number of antenna elements of an indicated group of antenna elements, parameters related to one or more selected groups of antennas such as array size, geometry, or beam pattern, digital beamforming parameters that are based on the number of antenna elements, or any combinations thereof. The transmission control parameters may be used to establish one or more beams to be used for communications using one or more of the different groups of antenna elements that were indicated by the UE communications manager <NUM>.

One or more of the base stations <NUM> may be an example of a second wireless device as discussed herein, and may include a base station communications manager <NUM>. The base station communications manager <NUM> may receive the indication of the transmission control parameters based on array size from the first wireless device, and may in some cases determine wireless resources, transmit power, MCS, digital beamforming codebooks, or any combinations thereof, for communications with the first wireless device.

<FIG> illustrates an example of a wireless communication device with multiple antenna arrays <NUM> that supports antenna group-specific parameter configuration in millimeter wave communications in accordance with one or more aspects of the present disclosure. In some examples, wireless communication device with multiple antenna arrays <NUM> may implement aspects of wireless communications system <NUM>. In this example, the wireless communication device may be a UE <NUM>-a, although in other cases the wireless communication device may be a different device, such as a CPE, a relay device, a router, a repeater, or an IAB node.

In this example, the UE115-a includes a number of different antenna modules, including a first antenna module <NUM>, a second antenna module <NUM>, and a third antenna module <NUM>. Each of the antenna modules <NUM> through <NUM> may include a number of subarrays <NUM> of antenna elements. In this example, the first antenna module <NUM> may include four subarrays <NUM>, including a first subarray <NUM>-a, a second subarray <NUM>-b, a third subarray <NUM>-c, and a fourth subarray <NUM>-d. Each subarray <NUM> in this example may include <NUM> individual antenna elements <NUM> arranged in a 4x4 array configuration. Each antenna element <NUM>, in some cases, may be a patch antenna element configured to communicate in a high-band mmW deployment. Thus, in various aspects, the UE <NUM>-a (or other device) may include a number of antenna elements that may be spread across a number of antenna arrays, antenna subarrays, antenna modules, or any combinations thereof. In some cases, the spacing of antenna elements <NUM> within each subarray <NUM> may be configured to provide for efficient analog beamforming at wavelengths associated with high-band mmW communications (e.g., in FR4). Further, in this example, each subarray <NUM> may include an associated radio frequency integrated circuit (RFIC) <NUM>.

In the example of <FIG>, the second antenna module <NUM> also may include multiple subarrays <NUM>, including a fifth subarray <NUM>-a and a sixth subarray <NUM>-b. In this example, the fifth subarray <NUM>-a includes eight antenna elements arranged in a 4x2 array configuration, and the sixth subarray <NUM>-b includes four antenna elements arranged in a 4x1 array configuration. In this case, a single RFIC (RFIC5) <NUM> may be coupled with the subarrays <NUM>, although multiple RFICs may be used or an RFIC may be shared with one or more other of the antenna modules <NUM> or <NUM>. While the antenna module <NUM> is illustrated as having multiple subarrays <NUM> that are different sizes, other examples may have a same number of subarrays <NUM> with each subarray having a same size (e.g., four 4x4 antenna subarrays similarly as illustrated in the first antenna module <NUM>). Techniques as discussed herein may be applied to any numbers of antenna modules <NUM> through <NUM>, any numbers of subarrays included in each antenna module, any numbers of antennas per subarray, or any combinations thereof.

As discussed herein, multiple RFICs <NUM> and associated antenna subarrays <NUM> may be used at different times by the wireless device. For example, in the case of <FIG> where the wireless device is UE <NUM>-a, it may be desirable to operate using a subset of the antenna modules <NUM> - <NUM>, using a subset of antenna subarrays <NUM> and associated RFICs <NUM>, using a subset of antenna elements <NUM> within one or more subarrays <NUM>, or any combinations thereof. Such operations may allow the UE <NUM>-a to manage power consumption in order to reduce power used by RFIC components, for example. In other cases, the UE <NUM>-a may determine, in addition to or alternatively to power consumption considerations, that one or more maximum permissible exposure (MPE) limitations, one or more thermal limitations, or combinations thereof, make it desirable to use some groups of antenna elements <NUM> of one or more subarrays <NUM>. Thus, even though a relatively large number of antenna elements <NUM> are available at the UE <NUM>-a, not all elements may be used at any particular instant in time. For example, the UE <NUM>-a may have a total of N antenna elements <NUM> across each of the different antenna modules <NUM> - <NUM>, and may choose K antenna elements <NUM> for communications, which results in NCK possibilities, which can result in a relatively large number of combinations of different antenna elements <NUM>. The computational and processing complexity of searching over these large number of combinations could be excessive to disallow its use in practical mmW communications. Thus, in some cases, the UE <NUM>-a may select a relatively small list of antenna groups that are useful at a given time (e.g., based on power consumption, MPE consideration, thermal considerations, complexity considerations, antenna and architectural considerations, etc.). The UE <NUM>-a may provide an indication of the selected antenna groups to a second wireless device (e.g., a base station) along with an indication of one or more transmission parameters that are based on a number of antenna elements of one or more antenna groups. Communications then may be established using one of the indicated antenna groups based on the one or more transmission parameters and number of antenna elements in the antenna group. Various examples of indications transmission control parameters of one or more antenna groups and procedures based on such indications are discussed with reference to <FIG> and <FIG>.

<FIG> illustrates an example of a wireless communications system <NUM> that supports antenna group-specific parameter configuration in millimeter wave communications in accordance with one or more aspects of the present disclosure. In some examples, wireless communications system <NUM> may implement aspects of wireless communications system <NUM>. In some examples, the wireless communications system <NUM> may include a UE <NUM>-b, and a base station <NUM>-a which may be examples of UEs <NUM> and base stations <NUM> described with reference to <FIG>. Further, UE <NUM>-b may be an example of a first wireless device, and the base station <NUM>-a may be an example of a second wireless device. The UE <NUM>-b and base station <NUM>-a may communicate using beamformed communications in which the UE <NUM>-b transmits uplink communications <NUM> to the base station <NUM>-a, and the base station <NUM>-a transmits downlink communications <NUM> to the UE <NUM>-b.

In some cases, the UE <NUM>-b may include a relatively large number of antenna elements, which may be spread across one or more antenna subarrays and one or more antenna modules, such as discussed with reference to <FIG>. The UE <NUM>-b may transmit antenna selection information <NUM> to the base station <NUM>-a that indicates one or more different antenna groups that have been selected at the UE <NUM>-b and are preferred for use in establishing transmission beams for mmW communications, and one or more transmission control parameters associated with the one or more antenna groups. The one or more transmission control parameters may be based on a number of antenna elements in the associated antenna group. In some cases, one or more transmission control parameters may be mapped to a number of antenna elements of an antenna group, one or more attributes of a transmission, or combinations thereof. For example, a MCS-dependent phase noise compensation may be mapped to a particular set of configured MCSs and number of antenna elements used in transmissions. In cases where such a mapping may be implemented, the mapping may be preconfigured or provided to the UE <NUM>-b when configuring a connection establishment or reestablishment.

In some cases, the base station <NUM>-a may initiate one or more procedures based on the antenna selection information <NUM>, such as a beam training procedure based on the indicated antenna groups, where different base station beams <NUM> and different UE beams <NUM> may be tested and measured to identify a preferred beam for communications. For example, the UE <NUM>-b may measure reference signals of multiple base station beams <NUM> using multiple UE beams <NUM> and select a preferred beam, and provide feedback to the base station <NUM>-a on the selected beam, such as through a chosen transmission configuration indication (TCI) state. In some cases, the UE <NUM>-b may transmit a CSI measurement report to the base station <NUM>-a based on measurements of the beam training procedure. Further, in some cases, the UE <NUM>-b may transmit the one or more transmission control parameters associated with the selected beam and associated group of antenna elements once the preferred beam has been selected, which may then be used by the base station <NUM>-a for allocating resources to the UE <NUM>-b, scheduling communications for the UE <NUM>-b, setting a digital beamforming codebook, setting one or more power control parameters, or any combinations thereof.

In some cases, the transmission control parameters may include, for example, an array size of one or more groups (which may also be referred to as sets) of antenna elements, an array geometry of the one or more sets of antenna elements, information associated with a beam pattern of the one or more sets of antenna elements (e.g., beamwidths, side lobe levels, array gains, etc.), or any combinations thereof. With different sets of antenna elements, a digital beamforming codebook used for communications between the UE <NUM>-b and base station <NUM>-a may be configured specific to the particular group of antennas that is used for communications, and may be indicated in a digital beamforming configuration <NUM> provided by the base station <NUM>-a. In some examples, the digital beamforming configuration <NUM> may be provided in downlink control information (DCI) with a resource grant that is provided to the UE <NUM>-b for uplink or downlink communications. Further, for power control, a maximum transmittable power at the UE <NUM>-b (e.g., Pcmax) may be dependent on the group of antenna elements used in communications due to EIRP limitations that may apply at the UE <NUM>-b, and different array sizes may lead to different array gains and thus impact Pcmax. Additionally, MCS-dependent phase noise compensation may be dependent upon antenna array size. The transmission control parameters may provide information related to Pcmax, array information, or combinations thereof, that may be used to determine a MCS for communications, a digital beamforming codebook, MCS-dependent phase noise compensation, or any combinations thereof, based on a number of antenna elements of the group of antenna elements that are to be used for communications. Additionally, the base station <NUM>-a may use the indication of antenna groups to help with scheduling based on data rates and antenna gains of the one or more groups of antenna elements that are used for communications.

<FIG> illustrates an example of a process flow <NUM> that supports antenna group-specific parameter configuration in millimeter wave communications in accordance with one or more aspects of the present disclosure. In some examples, process flow <NUM> may implement aspects of wireless communications system <NUM> or <NUM>. Process flow <NUM> may be implemented by first wireless device <NUM> and a second wireless device <NUM> as described herein. Alternative examples of the following may be implemented, where some steps are performed in a different order than described or are not performed at all. In some cases, steps may include additional features not mentioned below, or further steps may be added.

At <NUM>, in some examples, the second wireless device <NUM> may determine one or more beam training parameters for initiating a beam training procedure for the first wireless device <NUM>. In some cases, the one or more beam training parameters may be determined based on an indication of a number of different groups of antenna elements that have been selected by the first wireless device <NUM> for communications (e.g., based on desired power consumption of antenna modules at the first wireless device <NUM>, thermal management procedures at the first wireless device <NUM>, MPE management procedures at the first wireless device, etc.). For example, the first wireless device <NUM> may have a number of different antenna modules, each of which may have one or more antenna subarrays. Further, in some cases, each antenna summary may have its own associated RFIC. The first wireless device <NUM> may desire to limit the number of antenna modules and/or RFICs that are active at any particular time, in order to conserve power, manage thermal properties, manage MPE, or any combinations thereof. In such cases, the first wireless device <NUM> may identify antenna elements associated with particular antenna subarrays that are desired to be used for a particular time period, which may be provided to the second wireless device <NUM> and used to determine the beam training parameters.

At <NUM>, in some examples, the second wireless device <NUM> may transmit a beam training indication to the first wireless device <NUM>. The beam training indication may provide information related to resources that are to be used for transmitting training beams, parameters related to the training beams, and the like. At <NUM>, the second wireless device <NUM> may transmit reference signal transmissions using multiple beams as part of the beam training procedure. In some cases, the second wireless device <NUM> may use a beam sweep procedure in which reference signals (e.g., CSI-RSs) may be transmitted in consecutive different beams in accordance with one or more the determined beam training parameters.

At <NUM>, the first wireless device may measure received reference signals, determine a preferred set of antennas, and format a measurement report. The measurement report (e.g., a CSI measurement report) may include information related to measurements of one or more received reference signals (e.g., RSRP, SNR, etc.), and one or more transmission control parameters associated with one or more preferred groups of antenna elements that are based on a number of antenna elements in the group of antenna elements. In some cases, the first wireless device <NUM> may transmit an indication of a number of antenna elements in one or more preferred groups of antenna elements. In some cases, the first wireless device <NUM> may also provide a geometry of the one or more groups of antenna elements (e.g., planar array, linear array, distributed array, irregular array, etc.), information on an antenna beam pattern of the one or more groups of antenna elements (e.g., narrowest beamwidth, best array gains and highest side lobes seen with beams useable on the array, etc.), or any combinations thereof. At <NUM>, the first wireless device <NUM> may transmit the measurement report to the second wireless device <NUM>.

At <NUM>, the second wireless device <NUM> may determine beam and digital beamforming parameters for communications with the first wireless device <NUM> based on the indicated number of antenna elements of the one or more groups of antenna elements. In some cases, the second wireless device <NUM> may determine a transmission power for communications with the first wireless device <NUM>, a MCS for the communications with the first wireless device <NUM>, and parameters that determine a digital beamforming codebook for the communications with the first wireless device <NUM>. At <NUM>, in some examples, the second wireless device <NUM> may transmit a resource grant to the first wireless device <NUM> that may indicate resources and related parameters for an uplink or downlink grant, along with a digital beamforming indication (e.g., a PMI that is mapped to a digital beamforming codebook). In some cases, the resource grant may be transmitted to the first wireless device <NUM> in a DCI transmission in a physical downlink control channel.

At <NUM>, the first wireless device <NUM> may determine control parameters for communications with the second wireless device <NUM> based on the indicated number of antenna elements, and the resource grant and digital beamforming indication. In some cases, the first wireless device <NUM> may determine MCS-dependent phase noise compensation that is dependent on antenna array used for the communications and the MCS that is indicated in the resource grant. At <NUM>, the second wireless device <NUM> also may determine control parameters for communications with the second wireless device <NUM> based on the indicated number of antenna elements. At <NUM>, the first wireless device <NUM> may transmit an uplink transmission to the second wireless device <NUM>. The uplink transmission may be transmitted using the determined control parameters, and may be received at the second wireless device <NUM> based on receive parameters determined based on the number of elements in the antenna array that are used for transmission at the first wireless device <NUM>.

<FIG> shows a block diagram <NUM> of a device <NUM> that supports antenna group-specific parameter configuration in millimeter wave communications in accordance with one or more aspects of the present disclosure. The device <NUM> may be an example of aspects of a first wireless device or a UE <NUM> as described herein. The device <NUM> may include a receiver <NUM>, a communications manager <NUM>, and a transmitter <NUM>. The device <NUM> may also include a processor. Each of these components may be in communication with one another (e.g., via one or more buses).

The receiver <NUM> may 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 antenna group-specific parameter configuration in millimeter wave communications, etc.). Information may be passed on to other components of the device <NUM>. The receiver <NUM> may be an example of aspects of the transceiver <NUM> described with reference to <FIG>. The receiver <NUM> may utilize a single antenna or a set of antennas.

The communications manager <NUM> may receive signaling indicating a first set of antenna elements for communications with a second wireless device, the first set of antenna elements including a first number of antenna elements from one or more of a set of antenna elements of the first wireless device, and communicate with the second wireless device, using the first set of antenna elements, based on one or more transmission control parameters, where the one or more transmission control parameters include a power control parameter for uplink transmissions via a millimeter wave frequency band to the second wireless device, and where the power control parameter is determined based on the first number of antenna elements. The communications manager <NUM> may be an example of aspects of the communications manager <NUM> described herein.

The communications manager <NUM> may as described herein be implemented to realize one or more potential advantages. One implementation may allow the device <NUM> to provide an indication of a number of antenna elements of preferred antenna groups that may allow for efficient determination of transmission control parameters for beamformed communications. Further, implementations may allow the device <NUM> to utilize processing resources more efficiently, among other advantages.

The communications manager <NUM> may be an example of means for performing various aspects of configuration of antenna groups as described herein. The communications manager <NUM>, or its sub-components, may be implemented in hardware (e.g., in communications management circuitry). The circuitry may comprise of processor, 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.

In another implementation, the communications manager <NUM>, or its sub-components, may be implemented in code (e.g., as communications management 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 <NUM>, or its sub-components may be executed by a general-purpose processor, a DSP, an ASIC, an FPGA or other programmable logic device.

In some examples, the communications manager <NUM> may be configured to perform various operations (e.g., receiving, transmitting, measuring) using or otherwise in cooperation with the receiver <NUM>, the transmitter <NUM>, or both.

<FIG> shows a block diagram <NUM> of a device <NUM> that supports antenna group-specific parameter configuration in millimeter wave communications in accordance with aspects of the present disclosure. The device <NUM> may be an example of aspects of a device <NUM>, a first wireless device, or a UE as described herein. The device <NUM> may include a receiver <NUM>, a communications manager <NUM>, and a transmitter <NUM>. The device <NUM> may also include a processor. Each of these components may be in communication with one another (e.g., via one or more buses).

The communications manager <NUM> may be an example of aspects of the communications manager <NUM> as described herein. The communications manager <NUM> may include an antenna selection manager <NUM>, and a beam manager <NUM>. The communications manager <NUM> may be an example of aspects of the communications manager <NUM> described herein.

The antenna selection manager <NUM> may receive signaling indicating a first set of antenna elements for communications with a second wireless device, the first set of antenna elements including a first number of antenna elements from one or more of a set of antenna elements of the first wireless device.

The beam manager <NUM> may communicate with the second wireless device, using the first set of antenna elements, based on one or more transmission control parameters, where the one or more transmission control parameters may include a power control parameter for uplink transmissions via a millimeter wave frequency band to the second wireless device, and where the power control parameter may be determined based on the first number of antenna elements.

<FIG> shows a block diagram <NUM> of a communications manager <NUM> that supports antenna group-specific parameter configuration in millimeter wave communications in accordance with one or more aspects of the present disclosure. The communications manager <NUM> may be an example of aspects of a communications manager <NUM>, a communications manager <NUM>, or a communications manager <NUM> described herein. The communications manager <NUM> may include an antenna selection manager <NUM>, a beam manager <NUM>, a digital beamforming manager <NUM>, and a measurement component <NUM>. Each of these modules may communicate, directly or indirectly, with one another (e.g., via one or more buses).

The antenna selection manager <NUM> may receive signaling indicating a first set of antenna elements for communications with a second wireless device, the first set of antenna elements including a first number of antenna elements from one or more of a set of antenna elements of the first wireless device. In some cases, the arrays of antenna elements may be used for communications in a millimeter wave frequency band that includes frequencies that are greater than <NUM>. In some cases, the first wireless device is a UE or a CPE in a wireless communications system and the second wireless device is a base station, a CPE, a relay device, a router, a repeater, or an IAB node in the wireless communications system.

The beam manager <NUM> may communicate with the second wireless device, using the first set of antenna elements, based on one or more transmission control parameters, where the one or more transmission control parameters may include a power control parameter for uplink transmissions via a millimeter wave frequency band to the second wireless device, and where the power control parameter may be determined based on the first number of antenna elements. In some examples, the beam manager <NUM> may receive an indication from the second wireless device that the first set of antenna elements is to be used for communications with the second wireless device. In some cases, the one or more transmission control parameters include a power control parameter for uplink transmissions via a millimeter wave frequency band to the second wireless device, and where the power control parameter is determined based on the first number of antenna elements. In some cases, the one or more transmission control parameters include an MCS dependent phase compensation parameter for downlink transmissions received from the second wireless device via a millimeter wave frequency band, where the MCS-dependent phase compensation parameter is determined based on the first number of antenna elements. In some cases, the one or more transmission control parameters are determined based on a mapping between the first number of antenna elements and associated transmission control parameters.

The digital beamforming manager <NUM> may receive, from the second wireless device, an indication to configure a digital beamforming codebook that is to be used for the communications with the second wireless device, where one or more parameters associated with the digital beamforming codebook are determined based on the first number of antenna elements.

The measurement component <NUM> may measure one or more training signals received from the second wireless device using two or more different sets of antennas. In some examples, the measurement component <NUM> may transmit a measurement report to the second wireless device that indicates a first set of antenna elements. In some cases, the measurement report is transmitted to the second wireless device via RRC or MAC-CE signaling.

<FIG> shows a diagram of a system <NUM> including a device <NUM> that supports antenna group-specific parameter configuration in millimeter wave communications in accordance with one or more aspects of the present disclosure. The device <NUM> may be an example of or include the components of device <NUM>, device <NUM>, a first wireless device, or a UE as described herein. The device <NUM> may include components for bi-directional voice and data communications including components for transmitting and receiving communications, including a communications manager <NUM>, an I/O controller <NUM>, a transceiver <NUM>, an antenna <NUM>, memory <NUM>, and a processor <NUM>. These components may be in electronic communication via one or more buses (e.g., bus <NUM>).

The communications manager <NUM> may receive signaling indicating a first set of antenna elements for communications with a second wireless device, the first set of antenna elements including a first number of antenna elements from one or more of a set of antenna elements of the first wireless device, and communicate with the second wireless device, using the first set of antenna elements, based on one or more transmission control parameters, where the one or more transmission control parameters may include a power control parameter for uplink transmissions via a millimeter wave frequency band to the second wireless device, and where the power control parameter may be determined based on the first number of antenna elements.

In some cases, the memory <NUM> may contain, among other things, a basic I/O system (BIOS) which may control basic hardware or software operation such as the interaction with peripheral components or devices.

The processor <NUM> may include an intelligent hardware device, (e.g., a general-purpose processor, a DSP, a 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 <NUM> may be configured to operate a memory array using a memory controller. In other cases, a memory controller may be integrated into the processor <NUM>. The processor <NUM> may be configured to execute computer-readable instructions stored in a memory (e.g., the memory <NUM>) to cause the device <NUM> to perform various functions (e.g., functions or tasks supporting antenna group-specific parameter configuration in millimeter wave communications).

<FIG> shows a block diagram <NUM> of a device <NUM> that supports antenna group-specific parameter configuration in millimeter wave communications in accordance with one or more aspects of the present disclosure. The device <NUM> may be an example of aspects of a second wireless device or a base station as described herein. The device <NUM> may include a receiver <NUM>, a communications manager <NUM>, and a transmitter <NUM>. The device <NUM> may also include a processor. Each of these components may be in communication with one another (e.g., via one or more buses).

The communications manager <NUM> may transmit two or more training signals to a first wireless device as part of a beam training procedure for the first wireless device, receive, from the first wireless device, an indication of a first set of antenna elements, the first set of antenna elements including a first number of antenna elements, and transmit control information that indicates digital beamforming codebook parameters to the first wireless device, the digital beamforming codebook parameters may configure a digital beamforming codebook that may be used for communications with the second wireless device, where the digital beamforming codebook parameters may be determined based on the first number of antenna elements. The communications manager <NUM> may be an example of aspects of the communications manager <NUM> described herein.

The communications manager <NUM> may be an example of means for performing various aspects of configuration of antenna groups. The communications manager <NUM>, or its sub-components, may be implemented in hardware (e.g., in communications management circuitry). The circuitry may comprise of processor, DSP, an ASIC, an 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.

In some examples, the communications manager <NUM> may be configured to perform various operations (e.g., receiving, measuring, transmitting) using or otherwise in cooperation with the receiver <NUM>, the transmitter <NUM>, or both.

<FIG> shows a block diagram <NUM> of a device <NUM> that supports antenna group-specific parameter configuration in millimeter wave communications in accordance with one or more aspects of the present disclosure. The device <NUM> may be an example of aspects of a device <NUM>, a first wireless device, or a base station as described herein. The device <NUM> may include a receiver <NUM>, a communications manager <NUM>, and a transmitter <NUM>. The device <NUM> may also include a processor. Each of these components may be in communication with one another (e.g., via one or more buses).

The communications manager <NUM> may be an example of aspects of the communications manager <NUM> as described herein. The communications manager <NUM> may include a beam training manager <NUM>, a beam manager <NUM>, and a control parameter manager <NUM>. The communications manager <NUM> may be an example of aspects of the communications manager <NUM> described herein.

The beam training manager <NUM> may transmit two or more training signals to a first wireless device as part of a beam training procedure for the first wireless device.

The beam manager <NUM> may receive, from the first wireless device, an indication of a first set of antenna elements, the first set of antenna elements including a first number of antenna elements.

The control parameter manager <NUM> may transmit control information that indicates digital beamforming codebook parameters to the first wireless device, the digital beamforming codebook parameters configuring a digital beamforming codebook that may be used for communications with the second wireless device, where the digital beamforming codebook parameters may be determined based on the first number of antenna elements.

<FIG> shows a block diagram <NUM> of a communications manager <NUM> that supports antenna group-specific parameter configuration in millimeter wave communications in accordance with one or more aspects of the present disclosure. The communications manager <NUM> may be an example of aspects of a communications manager <NUM>, a communications manager <NUM>, or a communications manager <NUM> described herein. The communications manager <NUM> may include a beam training manager <NUM>, a beam manager <NUM>, a control parameter manager <NUM>, and a measurement report manager <NUM>. Each of these modules may communicate, directly or indirectly, with one another (e.g., via one or more buses).

The beam manager <NUM> may receive, from the first wireless device, an indication of a first set of antenna elements, the first set of antenna elements including a first number of antenna elements. In some examples, the beam manager <NUM> may receive the uplink transmissions from the first wireless device based on the one or more receive parameters. In some cases, communications may use a millimeter wave frequency band that includes frequencies that are greater than <NUM>. In some cases, the first wireless device is a UE or a CPE in a wireless communications system and the second wireless device is a base station, a CPE, a relay device, a router, a repeater, or an IAB node in the wireless communications system.

The control parameter manager <NUM> may transmit control information that indicates digital beamforming codebook parameters to the first wireless device, the digital beamforming codebook parameters may configure a digital beamforming codebook that may be used for communications with the second wireless device, where the digital beamforming codebook parameters may be determined based on the first number of antenna elements. In some examples, the control parameter manager <NUM> may receive, from the first wireless device, a power control parameter (e.g., Pcmax) for uplink transmissions from the first wireless device that is associated with the first number of antenna elements. In some examples, the control parameter manager <NUM> may determine one or more receive parameters for the uplink transmissions based on the power control parameter. In some cases, the one or more receive parameters are determined based on a mapping between the first number of antenna elements and associated receive parameters.

The measurement report manager <NUM> may receive one or more measurement reports, such as CSI measurement reports as part of a beam training procedure. In some cases, the indication of the first set of antenna elements is received with a measurement report from the first wireless device, and where the determining the digital beamforming codebook parameters are further based on the measurement report. In some cases, the measurement report is received from the first wireless device via RRC signaling.

<FIG> shows a diagram of a system <NUM> including a device <NUM> that supports antenna group-specific parameter configuration in millimeter wave communications in accordance with one or more aspects of the present disclosure. The device <NUM> may be an example of or include the components of device <NUM>, device <NUM>, a second wireless device, or a base station as described herein. The device <NUM> may include components for bi-directional voice and data communications including components for transmitting and receiving communications, including a communications manager <NUM>, a network communications manager <NUM>, a transceiver <NUM>, an antenna <NUM>, memory <NUM>, a processor <NUM>, and an inter-station communications manager <NUM>. These components may be in electronic communication via one or more buses (e.g., bus <NUM>).

The communications manager <NUM> may transmit two or more training signals to a first wireless device as part of a beam training procedure for the first wireless device, receive, from the first wireless device, an indication of a first set of antenna elements, the first set of antenna elements including a first number of antenna elements, and transmit control information that indicates digital beamforming codebook parameters to the first wireless device, the digital beamforming codebook parameters may configure a digital beamforming codebook that may be used for communications with the second wireless device, where the digital beamforming codebook parameters may be determined based on the first number of antenna elements.

The processor <NUM> may include an intelligent hardware device, (e.g., a general-purpose processor, a DSP, a 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 <NUM> may be configured to operate a memory array using a memory controller. In some cases, a memory controller may be integrated into processor <NUM>. The processor <NUM> may be configured to execute computer-readable instructions stored in a memory (e.g., the memory <NUM>) to cause the device <NUM> to perform various functions (e.g., functions or tasks supporting antenna group-specific parameter configuration in millimeter wave communications).

<FIG> shows a flowchart illustrating a method <NUM> that supports antenna group-specific parameter configuration in millimeter wave communications in accordance with one or more aspects of the present disclosure. The operations of method <NUM> may be implemented by a first wireless device or its components as described herein. For example, the operations of method <NUM> may be performed by a communications manager as described with reference to <FIG>. In some examples, a first wireless device may execute a set of instructions to control the functional elements of the first wireless device to perform the functions described herein. Additionally or alternatively, a first wireless device may perform aspects of the functions described herein using special-purpose hardware.

At <NUM>, the first wireless device may receive signaling indicating a first set of antenna elements for communications with a second wireless device, the first set of antenna elements including a first number of antenna elements from one or more of a set of antenna elements of the first wireless device. In some cases, the one or more transmission control parameters may include a power control parameter for uplink transmissions via a millimeter wave frequency band to the second wireless device, and the power control parameter may be determined based on the first number of antenna elements. The operations of <NUM> may be performed according to the methods described herein. In some examples, aspects of the operations of <NUM> may be performed by an antenna selection manager as described with reference to <FIG>.

At <NUM>, the first wireless device may communicate with the second wireless device, using the first set of antenna elements, based on one or more transmission control parameters. The operations of <NUM> may be performed according to the methods described herein. In some examples, aspects of the operations of <NUM> may be performed by a beam manager as described with reference to <FIG>.

At <NUM>, the first wireless device may receive signaling indicating a first set of antenna elements for communications with a second wireless device, the first set of antenna elements including a first number of antenna elements from one or more of a set of antenna elements of the first wireless device. The operations of <NUM> may be performed according to the methods described herein. In some examples, aspects of the operations of <NUM> may be performed by an antenna selection manager as described with reference to <FIG>.

At <NUM>, the first wireless device may receive, from the second wireless device, an indication to configure a digital beamforming codebook that is to be used for the communications with the second wireless device, where one or more parameters associated with the digital beamforming codebook are determined based on the first number of antenna elements. The operations of <NUM> may be performed according to the methods described herein. In some examples, aspects of the operations of <NUM> may be performed by a digital beamforming manager as described with reference to <FIG>.

At <NUM>, the first wireless device may communicate with the second wireless device, using the first set of antenna elements, based on one or more transmission control parameters. In some cases, the one or more transmission control parameters may include a power control parameter for uplink transmissions via a millimeter wave frequency band to the second wireless device, and the power control parameter may be determined based on the first number of antenna elements. The operations of <NUM> may be performed according to the methods described herein. In some examples, aspects of the operations of <NUM> may be performed by a beam manager as described with reference to <FIG>.

At <NUM>, the first wireless device may measure one or more training signals received from the second wireless device using two or more different sets of antennas. The operations of <NUM> may be performed according to the methods described herein. In some examples, aspects of the operations of <NUM> may be performed by a measurement component as described with reference to <FIG>.

At <NUM>, the first wireless device may transmit a measurement report to the second wireless device that indicates the first set of antenna elements. The operations of <NUM> may be performed according to the methods described herein. In some examples, aspects of the operations of <NUM> may be performed by a measurement component as described with reference to <FIG>.

At <NUM>, the first wireless device may receive an indication from the second wireless device that the first set of antenna elements is to be used for communications with the second wireless device. The operations of <NUM> may be performed according to the methods described herein. In some examples, aspects of the operations of <NUM> may be performed by a beam manager as described with reference to <FIG>.

<FIG> shows a flowchart illustrating a method <NUM> that supports antenna group-specific parameter configuration in millimeter wave communications in accordance with one or more aspects of the present disclosure. The operations of method <NUM> may be implemented by a second wireless device or its components as described herein. For example, the operations of method <NUM> may be performed by a communications manager as described with reference to <FIG>. In some examples, a second wireless device may execute a set of instructions to control the functional elements of the second wireless device to perform the functions described herein. Additionally or alternatively, a second wireless device may perform aspects of the functions described herein using special-purpose hardware.

At <NUM>, the second wireless device may transmit two or more training signals to a first wireless device as part of a beam training procedure for the first wireless device. The operations of <NUM> may be performed according to the methods described herein. In some examples, aspects of the operations of <NUM> may be performed by a beam training manager as described with reference to <FIG>.

At <NUM>, the second wireless device may receive, from the first wireless device, an indication of a first set of antenna elements, where the first set of antenna elements includes a first number of antenna elements. The operations of <NUM> may be performed according to the methods described herein. In some examples, aspects of the operations of <NUM> may be performed by a beam manager as described with reference to <FIG>.

At <NUM>, the second wireless device may transmit control information that indicates digital beamforming codebook parameters to the first wireless device, the digital beamforming codebook parameters may configure a digital beamforming codebook that may be used for communications with the second wireless device. In some cases, the digital beamforming codebook parameters may be determined based on the first number of antenna elements. The operations of <NUM> may be performed according to the methods described herein. In some examples, aspects of the operations of <NUM> may be performed by a control parameter manager as described with reference to <FIG>.

At <NUM>, the second wireless device may transmit control information that indicates digital beamforming codebook parameters to the first wireless device, the digital beamforming codebook parameters configuring a digital beamforming codebook that may be used for communications with the second wireless device. In some cases, the digital beamforming codebook parameters may be determined based on the first number of antenna elements. The operations of <NUM> may be performed according to the methods described herein. In some examples, aspects of the operations of <NUM> may be performed by a control parameter manager as described with reference to <FIG>.

At <NUM>, the second wireless device may receive, from the first wireless device, a power control parameter for uplink transmissions from the first wireless device that is associated with the first number of antenna elements. The operations of <NUM> may be performed according to the methods described herein. In some examples, aspects of the operations of <NUM> may be performed by a control parameter manager as described with reference to <FIG>.

At <NUM>, the second wireless device may receive the uplink transmissions from the first wireless device based on one or more receive parameters, the one or more receive parameters based on the power control parameter. The operations of <NUM> may be performed according to the methods described herein. In some examples, aspects of the operations of <NUM> may be performed by a beam manager as described with reference to <FIG>.

Due to the nature of software, functions described herein may be implemented using software executed by a processor, hardware, firmware, hardwiring, or combinations of any of these.

A non-transitory storage medium may be any available medium that may be accessed by a general-purpose or special purpose computer. By way of example, and not limitation, non-transitory computer-readable media may 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 may be used to carry or store desired program code means in the form of instructions or data structures and that may be accessed by a general-purpose or special-purpose computer, or a general-purpose or special-purpose processor. 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. Combinations of the above are also included within a computer-readable media.

As used herein, the phrase "or" as used in a list of items (e.g., 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). For example, an example step that is described as "based on condition A" may be based on both a condition A and a condition B.

The term "example" used herein means "serving as an example, instance, or illustration," and not "preferred" or "advantageous over other examples. In some instances, known structures and devices are shown in block diagram form in order to avoid obscuring the concepts of the described examples.

Claim 1:
A method for wireless communications at a first wireless device, comprising:
transmitting (<NUM>), to a second wireless device, an indication of one or more different sets of antenna elements for communications with the second wireless device, wherein the one or more different sets of antenna elements include a number of antenna elements from a plurality of antenna elements of the first wireless device;
receiving (<NUM>, <NUM>), from the second wireless device, one or more training signals as part of a beam training procedure for the first wireless device, wherein the beam training procedure is based on the indication of the one or more different sets of antenna elements, selecting a beam preferred by the first wireless device; and
communicating (<NUM>, <NUM>), with the second wireless device, using one of the one or more different sets of antenna elements, the one set of antenna elements used for communicating being associated with the selected beam, the communicating being based on one or more transmission control parameters, wherein the one or more transmission control parameters include a maximum transmittable power parameter determined based on the number of antenna elements of the one set of antenna elements used for communicating.