Signaling of Beam Correlation across Millimeter-Wave Frequency Bands

Abstract

Methods, systems, and devices for wireless communication are described. A first wireless device may receive a carrier aggregation configuration from a second wireless device, the carrier aggregation configuration including two millimeter wave frequency bands for communication. The first wireless device may determine beam correlation parameters based on the carrier aggregation configuration. The first wireless device may determine beams in the two frequency bands based on the beam correlation parameters. The first wireless device and the second wireless device may communicate in the carrier aggregation using a beam on a first frequency band and a second beam on a second frequency band.

Description

[0001] Cross-reference

[0002] This patent application claims priority to U.S. Patent Application No. 17 / 157,907, titled "SIGNALING OF BEAM CORRELATION ACROSS MILLIMETER WAVE FREQUENCY BANDS," filed by RAGHAVAN et al. on January 25, 2021, and U.S. Provisional Patent Application No. 62 / 966,533, titled "SIGNALING OF BEAM CORRELATION ACROSS MILLIMETER WAVE FREQUENCY BANDS," filed by RAGHAVAN et al. on January 27, 2020, each of which is assigned to the assignee of this application.

[0003] Introduction

[0004] The following relates to wireless communication, and more particularly, to managing beam correlation.

[0005] Wireless communication systems are widely deployed to provide various types of communication content, such as voice, video, packet data, messaging, broadcasting, and so on. These systems may be capable of supporting communication with multiple users by sharing available system resources (e.g., time, frequency, and power). Examples of such multi-access systems include fourth-generation (4G) systems (such as Long-Term Evolution (LTE) systems, LTE-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 may employ various techniques, 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 multi-access communication system may include one or more base stations or one or more network access nodes, each of which simultaneously supports communication for multiple communication devices, which may also be referred to as User Equipment (UE).

[0006] Overview

[0007] A method for wireless communication at a first wireless device is described. The method may include receiving, from a second wireless device, a carrier aggregation configuration for communicating with the second wireless device, the carrier aggregation configuration including at least a first frequency band and a second frequency band. The method may further include communicating with the second wireless device in a carrier aggregation using a first beam on the first frequency band and a second beam on the second frequency band, the first beam and the second beam being based on a beam correlation parameter that is based on the received carrier aggregation configuration.

[0008] An apparatus for wireless communication at a first wireless device is described. The apparatus may include a processor and a memory coupled to the processor. The processor and the memory are configured to cause the apparatus to: receive, from a second wireless device, a carrier aggregation configuration for communicating with the second wireless device, the carrier aggregation configuration including at least a first frequency band and a second frequency band; and communicate with the second wireless device in a carrier aggregation using a first beam on the first frequency band and a second beam on the second frequency band, the first beam and the second beam being based on a beam correlation parameter that is based on the received carrier aggregation configuration.

[0009] Another piece of equipment for wireless communication at a first wireless device is described. The equipment may include means for receiving, from a second wireless device, a carrier aggregation configuration for communicating with the second wireless device, the carrier aggregation configuration including at least a first frequency band and a second frequency band. The equipment may further include means for communicating with the second wireless device in a carrier aggregation using a first beam on the first frequency band and a second beam on the second frequency band, the first beam and the second beam being based on a beam correlation parameter that is based on the received carrier aggregation configuration.

[0010] A non-transitory computer-readable medium storing code for wireless communication at a first wireless device is described. The code may include instructions executable by a processor for: receiving, from a second wireless device, a carrier aggregation configuration for communicating with the second wireless device, the carrier aggregation configuration including at least a first frequency band and a second frequency band. The code may further include instructions for: communicating with the second wireless device in a carrier aggregation using a first beam on the first frequency band and a second beam on the second frequency band, the first beam and the second beam being based on a beam correlation parameter that is based on the received carrier aggregation configuration.

[0011] In some examples of the methods, apparatuses (devices), and non-transitory computer-readable media described herein, receiving the carrier aggregation configuration may include operations, features, means, or instructions for: receiving an inter-band carrier aggregation configuration from the second wireless device.

[0012] In some examples of the methods, apparatuses (devices), and non-transitory computer-readable media described herein, the first frequency band may be a first millimeter wave frequency band, and the second frequency band may be a second millimeter wave frequency band.

[0013] In some examples of the methods, apparatuses (devices), and non-transitory computer-readable media described herein, receiving a carrier aggregation configuration may include operations, features, apparatuses, or instructions for: receiving a configuration message from a second wireless device, the configuration message being a broadcast message to one or more wireless devices including at least the first wireless device, a wireless device-specific message for the first wireless device, or both.

[0014] In some examples of the methods, apparatuses (devices), and non-transitory computer-readable media described herein, receiving a carrier aggregation configuration may include operations, features, apparatuses, or instructions for: receiving a configuration message from a second wireless device that is specific to the bandwidth parts of the first frequency band and the second frequency band.

[0015] In some examples of the methods, apparatuses (devices), and non-transitory computer-readable media described herein, receiving a carrier aggregation configuration may include operations, features, apparatuses, or instructions for: receiving a configuration message from a second wireless device that is specific to the transmission configuration indication state used by the second wireless device in the first frequency band and the second frequency band.

[0016] In some examples of the methods, apparatuses (devices), and non-transitory computer-readable media described herein, receiving a carrier aggregation configuration may include operations, features, apparatuses, or instructions for: receiving a configuration message from a second wireless device that is a weighted average metric of two or more transmission configuration indication states used by the second wireless device in the first frequency band and the second frequency band.

[0017] In some examples of the methods, apparatuses (devices), and non-transitory computer-readable media described herein, communicating in a carrier aggregation may include operations, features, apparatuses, or instructions for: communicating in the carrier aggregation based on a weight for use with the weighted average metric and the transmission configuration indication state of a second beam used in determining the weighted average.

[0018] In some examples of the methods, apparatuses (devices), and non-transitory computer-readable media described herein, the first frequency band may be a lower millimeter wave frequency band, and the second frequency band may be a higher millimeter wave frequency band.

[0019] In some examples of the methods, apparatuses (devices), and non-transitory computer-readable media described herein, the first frequency band includes frequencies between 24.25 GHz and 52.6 GHz, and the second frequency band includes frequencies greater than 52.6 GHz.

[0020] In some examples of the methods, apparatuses (devices), and non-transitory computer-readable media described herein, the first wireless device may be a user equipment (UE) or a client premise equipment (CPE) in a wireless communication system, and the second wireless device may be a base station, a CPE, a relay device, a router, a repeater, or an integrated access and backhaul (IAB) node in the wireless communication system.

[0021] A method for wireless communication at a second wireless device is described. The method may include transmitting, to a first wireless device, a carrier aggregation configuration for communicating with the first wireless device, the carrier aggregation configuration including at least a first frequency band and a second frequency band. The method may further include: communicating with the first wireless device in a carrier aggregation using a first beam on the first frequency band and a second beam on a second millimeter wave frequency band, the first beam and the second beam being based on a beam correlation parameter that is based on the received carrier aggregation configuration.

[0022] An apparatus for wireless communication at a second wireless device is described. The apparatus may include a processor and a memory coupled to the processor. The processor and the memory are configured to cause the apparatus to: transmit, to a first wireless device, a carrier aggregation configuration for communicating with the first wireless device, the carrier aggregation configuration including at least a first frequency band and a second frequency band; and communicate with the first wireless device in a carrier aggregation using a first beam on the first frequency band and a second beam on a second millimeter wave frequency band, the first beam and the second beam being based on a beam correlation parameter that is based on the received carrier aggregation configuration.

[0023] Another piece of equipment for wireless communication at a second wireless device is described. The equipment may include means for transmitting, to a first wireless device, a carrier aggregation configuration for communicating with the first wireless device, the carrier aggregation configuration including at least a first frequency band and a second frequency band. The equipment may further include: means for communicating with the first wireless device in a carrier aggregation using a first beam on the first frequency band and a second beam on a second millimeter wave frequency band, the first beam and the second beam being based on a beam correlation parameter that is based on the received carrier aggregation configuration.

[0024] A non-transitory computer-readable medium storing code for wireless communication at a second wireless device is described. The code may include instructions executable by a processor to: transmit, to a first wireless device, a carrier aggregation configuration for communicating with the first wireless device, the carrier aggregation configuration including at least a first frequency band and a second frequency band; and communicate with the first wireless device in a carrier aggregation using a first beam on the first frequency band and a second beam on a second millimeter wave frequency band, the first beam and the second beam being based on a beam correlation parameter that is based on the received carrier aggregation configuration.

[0025] In some examples of the methods, apparatuses (devices), and non-transitory computer-readable media described herein, transmitting a carrier aggregation configuration may include operations, features, apparatuses, or instructions for the following actions: transmitting an inter-band carrier aggregation configuration from a second wireless device.

[0026] In some examples of the methods, apparatuses (devices), and non-transitory computer-readable media described herein, the first frequency band may be a first millimeter-wave frequency band, and the second frequency band may be a second millimeter-wave frequency band.

[0027] In some examples of the methods, apparatuses (devices), and non-transitory computer-readable media described herein, transmitting a carrier aggregation configuration may include operations, features, apparatuses, or instructions for the following actions: transmitting a configuration message to a first wireless device, the configuration message being a broadcast message to one or more wireless devices including at least the first wireless device, a wireless device-specific message for the first wireless device, or both.

[0028] In some examples of the methods, apparatuses (devices), and non-transitory computer-readable media described herein, transmitting a carrier aggregation configuration may include operations, features, apparatuses, or instructions for the following actions: transmitting a configuration message to a first wireless device that is specific to a bandwidth part of the first frequency band and the second frequency band.

[0029] In some examples of the methods, apparatuses (devices), and non-transitory computer-readable media described herein, transmitting a carrier aggregation configuration may include operations, features, apparatuses, or instructions for the following actions: transmitting a configuration message to a first wireless device that is specific to a transmission configuration indication state used by a second wireless device in the first frequency band and the second frequency band.

[0030] In some examples of the methods, apparatuses (devices), and non-transitory computer-readable media described herein, transmitting a carrier aggregation configuration may include operations, features, apparatuses, or instructions for the following actions: transmitting a configuration message to a first wireless device that is a weighted average metric of two or more transmission configuration indication states used by a second wireless device in the first frequency band and the second frequency band.

[0031] In some examples of the methods, apparatuses (devices), and non-transitory computer-readable media described herein, the first frequency band may be a lower millimeter-wave frequency band, and the second frequency band may be a higher millimeter-wave frequency band.

[0032] In some examples of the methods, apparatuses (devices), and non-transitory computer-readable media described herein, the first wireless device may be a UE or a CPE in a wireless communication system, and the second wireless device may be a base station, a CPE, a relay device, a router, a repeater, or an IAB node in a wireless communication system.

[0033] In some examples of the methods, apparatuses (devices), and non-transitory computer-readable media described herein, the first frequency band includes frequencies between 24.25 GHz and 52.6 GHz, and the second frequency band includes frequencies greater than 52.6 GHz.

[0034] Another method for wireless communication at a first wireless device is described. The method may include: receiving, from a second wireless device, an inter-band carrier aggregation configuration for communicating with the second wireless device, the inter-band carrier aggregation configuration including at least a first millimeter-wave frequency band and a second millimeter-wave frequency band; determining beam correlation parameters based on the inter-band carrier aggregation configuration received from the second wireless device; determining a first beam for use in communicating with the second wireless device on the first millimeter-wave frequency band based on the beam correlation parameters; determining a second beam for use in communicating with the second wireless device on the second millimeter-wave frequency band based on the beam correlation parameters; and communicating with the second wireless device in an inter-band carrier aggregation mode using the first beam on the first millimeter-wave frequency band and the second beam on the second millimeter-wave frequency band.

[0035] Another apparatus for wireless communication at a first wireless device is described. The apparatus may include a processor, a memory coupled to the processor, and instructions stored in the memory. The instructions may be executed by the processor to cause the apparatus to: receive, from a second wireless device, an inter-band carrier aggregation configuration for communicating with the second wireless device, the inter-band carrier aggregation configuration including at least a first millimeter-wave frequency band and a second millimeter-wave frequency band; determine beam correlation parameters based on the inter-band carrier aggregation configuration received from the second wireless device; determine a first beam for use in communicating with the second wireless device on the first millimeter-wave frequency band based on the beam correlation parameters; determine a second beam for use in communicating with the second wireless device on the second millimeter-wave frequency band based on the beam correlation parameters; and communicate with the second wireless device in an inter-band carrier aggregation mode using the first beam on the first millimeter-wave frequency band and the second beam on the second millimeter-wave frequency band.

[0036] Describes another apparatus for wireless communication at a first wireless device. The apparatus may include means for: receiving, from a second wireless device, an inter-band carrier aggregation configuration for communicating with the second wireless device, the inter-band carrier aggregation configuration including at least a first millimeter wave band and a second millimeter wave band; determining a beam correlation parameter based on the inter-band carrier aggregation configuration received from the second wireless device; determining a first beam for use in communicating with the second wireless device on the first millimeter wave band based on the beam correlation parameter; determining a second beam for use in communicating with the second wireless device on the second millimeter wave band based on the beam correlation parameter; and communicating with the second wireless device in an inter-band carrier aggregation mode using the first beam on the first millimeter wave band and the second beam on the second millimeter wave band.

[0037] Describes another non-transitory computer-readable medium storing code for wireless communication at a first wireless device. The code may include instructions executable by a processor for: receiving, from a second wireless device, an inter-band carrier aggregation configuration for communicating with the second wireless device, the inter-band carrier aggregation configuration including at least a first millimeter wave band and a second millimeter wave band; determining a beam correlation parameter based on the inter-band carrier aggregation configuration received from the second wireless device; determining a first beam for use in communicating with the second wireless device on the first millimeter wave band based on the beam correlation parameter; determining a second beam for use in communicating with the second wireless device on the second millimeter wave band based on the beam correlation parameter; and communicating with the second wireless device in an inter-band carrier aggregation mode using the first beam on the first millimeter wave band and the second beam on the second millimeter wave band.

[0038] In some examples of the methods, apparatuses (devices), and non-transitory computer-readable media described herein, receiving the inter-band carrier aggregation configuration may include operations, features, means, or instructions for: receiving a configuration message from the second wireless device, the configuration message being a broadcast message to one or more wireless devices including at least the first wireless device, a wireless device-specific message for the first wireless device, or both.

[0039] In some examples of the methods, apparatuses (devices), and non-transitory computer-readable media described herein, receiving the inter-band carrier aggregation configuration may include operations, features, means, or instructions for: receiving a configuration message specific to the bandwidth portions of the first and second millimeter wave bands from the second wireless device.

[0040] In some examples of the methods, apparatuses (devices), and non-transitory computer-readable media described herein, receiving an inter-band carrier aggregation configuration may include operations, features, apparatuses, or instructions for the following actions: receiving a configuration message from a second wireless device, the configuration message being specific to a transmission configuration indication state used by the second wireless device in first and second millimeter wave frequency bands.

[0041] In some examples of the methods, apparatuses (devices), and non-transitory computer-readable media described herein, receiving an inter-band carrier aggregation configuration may include operations, features, apparatuses, or instructions for the following actions: receiving a configuration message from a second wireless device, the configuration message being a weighted average metric of two or more transmission configuration indication states used by the second wireless device in first and second millimeter wave frequency bands.

[0042] Some examples of the methods, apparatuses (devices), and non-transitory computer-readable media described herein may further include operations, features, apparatuses, or instructions for the following actions: determining weights for use with the weighted average metric and a transmission configuration indication of a second beam used in determining the weighted average.

[0043] In some examples of the methods, apparatuses (devices), and non-transitory computer-readable media described herein, the first millimeter wave frequency band may be a lower millimeter wave frequency band, and the second millimeter wave frequency band may be a higher millimeter wave frequency band.

[0044] In some examples of the methods, apparatuses (devices), and non-transitory computer-readable media described herein, the first millimeter wave frequency band includes frequencies between 24.25 GHz and 52.6 GHz, and the second millimeter wave frequency band includes frequencies that may be greater than 52.6 GHz.

[0045] In some examples of the methods, apparatuses (devices), and non-transitory computer-readable media described herein, the first wireless device may be a UE or a CPE in a wireless communication system, and the second wireless device may be a base station, a CPE, a relay device, a router, a repeater, or an IAB node in the wireless communication system.

[0046] A method of wireless communication at a second wireless device is described. The method may include: transmitting an inter-band carrier aggregation configuration for communicating with a first wireless device to the first wireless device, the inter-band carrier aggregation configuration including at least a first millimeter wave frequency band and a second millimeter wave frequency band; determining beam correlation parameters based on the inter-band carrier aggregation configuration; and communicating with the first wireless device in an inter-band carrier aggregation mode using a first beam on the first millimeter wave frequency band and a second beam on the second millimeter wave frequency band, the first beam and the second beam being based on the beam correlation parameters.

[0047] Describes an apparatus for wireless communication at a second wireless device. The apparatus may include a processor, a memory coupled to the processor, and instructions stored in the memory. The instructions may be executed by the processor to cause the apparatus to: transmit to a first wireless device an inter-band carrier aggregation configuration for communicating with the first wireless device, the inter-band carrier aggregation configuration including at least a first millimeter wave band and a second millimeter wave band; determine beam correlation parameters based on the inter-band carrier aggregation configuration; and communicate with the first wireless device in an inter-band carrier aggregation mode using a first beam on the first millimeter wave band and a second beam on the second millimeter wave band, the first beam and the second beam being based on the beam correlation parameters.

[0048] Describes another apparatus for wireless communication at a second wireless device. The apparatus may include means for: transmitting to a first wireless device an inter-band carrier aggregation configuration for communicating with the first wireless device, the inter-band carrier aggregation configuration including at least a first millimeter wave band and a second millimeter wave band; determining beam correlation parameters based on the inter-band carrier aggregation configuration; and communicating with the first wireless device in an inter-band carrier aggregation mode using a first beam on the first millimeter wave band and a second beam on the second millimeter wave band, the first beam and the second beam being based on the beam correlation parameters.

[0049] Describes a non-transitory computer-readable medium storing code for wireless communication at a second wireless device. The code may include instructions executable by a processor for: transmitting to a first wireless device an inter-band carrier aggregation configuration for communicating with the first wireless device, the inter-band carrier aggregation configuration including at least a first millimeter wave band and a second millimeter wave band; determining beam correlation parameters based on the inter-band carrier aggregation configuration; and communicating with the first wireless device in an inter-band carrier aggregation mode using a first beam on the first millimeter wave band and a second beam on the second millimeter wave band, the first beam and the second beam being based on the beam correlation parameters.

[0050] In some examples of the methods, apparatuses (devices), and non-transitory computer-readable media described herein, transmitting the inter-band carrier aggregation configuration may include operations, features, means, or instructions for: transmitting a configuration message to the first wireless device, the configuration message being a broadcast message to one or more wireless devices including at least the first wireless device, a wireless device-specific message for the first wireless device, or both.

[0051] In some examples of the methods, apparatuses (devices), and non-transitory computer-readable media described herein, transmitting the inter-band carrier aggregation configuration may include operations, features, means, or instructions for: transmitting a configuration message specific to a bandwidth part of the first and second millimeter wave bands to the first wireless device.

[0052] In some examples of the methods, apparatuses (devices), and non-transitory computer-readable media described herein, an inter-belt carrier aggregation configuration may include operations, features, apparatuses, or instructions for: transmitting a configuration message to a first wireless device, the configuration message being specific to a transmission configuration indication state used by a second wireless device in first and second millimeter wave frequency bands.

[0053] In some examples of the methods, apparatuses (devices), and non-transitory computer-readable media described herein, an inter-belt carrier aggregation configuration may include operations, features, apparatuses, or instructions for: transmitting a configuration message to a first wireless device, the configuration message being a weighted average metric of two or more transmission configuration indication states used by a second wireless device in first and second millimeter wave frequency bands.

[0054] In some examples of the methods, apparatuses (devices), and non-transitory computer-readable media described herein, the first millimeter wave frequency band may be a lower millimeter wave frequency band, and the second millimeter wave frequency band may be a higher millimeter wave frequency band.

[0055] In some examples of the methods, apparatuses (devices), and non-transitory computer-readable media described herein, the first wireless device may be a UE or a CPE in a wireless communication system, and the second wireless device may be a base station, a CPE, a relay device, a router, a repeater, or an IAB node in a wireless communication system.

[0056] In some examples of the methods, apparatuses (devices), and non-transitory computer-readable media described herein, the first millimeter wave frequency band includes frequencies between 24.25 GHz and 52.6 GHz, and the second millimeter wave frequency band includes frequencies that may be greater than 52.6 GHz. BRIEF DESCRIPTION OF THE DRAWINGS

[0058] Figure 1 An example of a wireless communication system supporting signaling for beam correlation across millimeter wave frequency bands in accordance with aspects of the present disclosure is illustrated.

[0059] Figure 2 An example of a wireless communication device having multiple antenna arrays supporting signaling for beam correlation across millimeter wave frequency bands in accordance with aspects of the present disclosure is illustrated.

[0060] Figure 3 An example of a wireless communication system supporting signaling for beam correlation across millimeter wave frequency bands in accordance with aspects of the present disclosure is illustrated.

[0061] Figure 4 An example of a wireless communication system supporting signaling for beam correlation across millimeter wave frequency bands in accordance with aspects of the present disclosure is illustrated.

[0062] Figure 5 An example of a process flow of signaling that supports beam correlation across millimeter wave frequency bands in accordance with aspects of the present disclosure is illustrated.

[0063] Figure 6 and 7 A block diagram of a device that supports signaling for beam correlation across millimeter wave frequency bands in accordance with aspects of the present disclosure is shown.

[0064] Figure 8 A block diagram of a communication manager that supports signaling for beam correlation across millimeter wave frequency bands in accordance with aspects of the present disclosure is shown.

[0065] Figure 9 A diagram of a system that includes a device that supports signaling for beam correlation across millimeter wave frequency bands in accordance with aspects of the present disclosure is shown.

[0066] Figure 10 and 11 A block diagram of a device that supports signaling for beam correlation across millimeter wave frequency bands in accordance with aspects of the present disclosure is shown.

[0067] Figure 12 A block diagram of a communication manager that supports signaling for beam correlation across millimeter wave frequency bands in accordance with aspects of the present disclosure is shown.

[0068] Figure 13 A diagram of a system that includes a device that supports signaling for beam correlation across millimeter wave frequency bands in accordance with aspects of the present disclosure is shown.

[0069] Figures 14 to 23 A flowchart that illustrates a method for signaling that supports beam correlation across millimeter wave frequency bands in accordance with aspects of the present disclosure is shown.

[0070] Detailed Description

[0071] In some deployments, a wireless communication system may operate in a millimeter wave (mmW) frequency range (e.g., 24 GHz, 26 GHz, 28 GHz, 39 GHz, 52.6–71 GHz, etc.). Wireless communication at these frequencies may be associated with increased signal attenuation (e.g., path loss, penetration loss, blockage loss), which may be affected by various factors such as diffraction, propagation environment, blockage density, material properties, etc. As a result, signal processing techniques (such as beamforming) may be used to coherently combine energy and overcome path loss at these frequencies. Due to the increased amount of path, penetration, and blockage loss in mmW communication systems, transmissions between wireless devices (e.g., from a base station and / or user equipment (UE)) may be beamformed. Additionally, a receiving device may use beamforming techniques to configure antennas and / or antenna arrays and / or antenna array modules such that transmissions are received in a directional manner.

[0072] Some wireless communication systems may employ carrier aggregation techniques, where communication between devices uses multiple component carriers to convey simultaneously or concurrently. In some examples, such techniques can be configured to increase the information throughput between devices compared to communication using a single component carrier. Carrier aggregation techniques can be applied across one or more frequency bands. In some examples, carrier aggregation techniques performed using component carriers in the same frequency band may be referred to as "intra-band" carrier aggregation. In some examples, carrier aggregation techniques performed using component carriers in different frequency bands (e.g., two or more non-overlapping frequency bands in the frequency domain) may be referred to as "inter-band" carrier aggregation.

[0073] In some cases, carrier aggregation may rely on when signals in different frequency bands are received in the same or similar directions (e.g., having the highest received power direction within a threshold separation angle, using receiving beams or directions with good correlation), or may be performed otherwise at this time. For example, carrier aggregation may be associated with favorable spectral efficiency when the receiving direction at the receiving device uses the same cluster in the channel, the same or similar set of beamforming weights to direct peak energy in the same or similar directions, the same or similar modulation and coding scheme (MCS), or other relevant configurations or characteristics at the receiving device. When these or other criteria for supporting carrier aggregation are not met (e.g., when the beams or directions of different frequency bands do not have good correlation), it may be preferable to use different sets of transmit or receive beams to perform carrier aggregation, or to inhibit communication according to carrier aggregation. Thus, procedures and metrics for evaluating beam correlation can be beneficial for various aspects of supporting carrier aggregation, including various examples of inter-band carrier aggregation or intra-band carrier aggregation.

[0074] In some deployments, communication in mmW frequencies may utilize the so-called frequency range 2 (FR2), which corresponds to deployments in 24 GHz, 26 GHz, 28 GHz, 39 GHz, etc. As the demand for wireless communication increases, additional mmW frequencies may be desirable for some deployments, such as frequency range 4 (FR4) (e.g., higher mmW bands), which may be associated with 52.6 GHz and above. In many FR2 deployments, wireless devices use antenna modules that include several antenna elements, such as an array of four antenna elements per module in a 4x1 array arrangement, and other example configurations. The higher mmW bands have shorter wavelengths, and thus more antenna elements can be placed in the same physical aperture in FR4 compared to FR2. For example, an FR4 device may have multiple antenna modules, each antenna module containing four 4x4 sub-arrays. 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 sub-arrays within an antenna module or across antenna modules than others.

[0075] In some cases, a wireless device may perform inter-band carrier aggregation in FR4 and FR2. However, due to environmental degradation (oxygen absorption, water vapor reflection from metal objects, fading, obstruction, polarization-dependent loss, etc.), the quality of the beams used in communication with other wireless devices may vary in FR2 and FR4. For example, a wireless device may detect a cluster at 28 GHz but not detect a cluster at 60 GHz in the same direction. As used herein, a cluster may refer to one or more signals within a particular physical direction or bandwidth. For example, a cluster as one or more beams may be detected in a particular bandwidth of approximately 28 or 60 GHz, where some of the beams may be subject to multipath or other environmental degradation.

[0076] Aspects of the present disclosure provide that a first wireless device may configure beam correlation parameters for mmW bands in FR2 and FR4 of an inter-band carrier aggregation system to determine communication beams. A carrier aggregation configuration may identify two or more communication frequencies that may be used to configure the wireless device. For example, the first wireless device may receive a carrier aggregation configuration from a second wireless device, the carrier aggregation configuration including two mmW bands for communication (e.g., in FR2 and FR4). The second wireless device may send the carrier aggregation configuration as a configuration message. The configuration message may be a broadcast message, specific to a bandwidth part of FR2 and FR4, specific to a transmission configuration indication (TCI) state used in FR2 and FR4, or a weighted average metric of two or more TCI states used in FR2 or FR4. The first wireless device may determine beam correlation parameters based on the carrier aggregation configuration. For example, the beam correlation parameters may indicate the correlation between beams in two mmW bands having co-directional beams in the direction of using inter-band carrier aggregation. The first wireless device may determine the beams in FR2 and FR4 based on the beam correlation parameters and use these beams to communicate with the second wireless device. The wireless device may communicate using the beams determined based on the beam correlation parameters in FR2 and FR4. For example, the wireless device may detect a cluster at 28 GHz (in FR2) and a cluster at 60 GHz (in FR4). Thus, when communicating based on the beam correlation parameters, the wireless device may detect a cluster at 28 GHz and a cluster at 60 GHz in the same direction as the transmitted beam.

[0077] The described techniques may support improved signaling of beam correlation across millimeter wave bands, reduced signaling overhead, and improved reliability. Thus, the supported techniques may include improved network operation and, in some examples, may enhance network efficiency.

[0078] Aspects of the present disclosure are initially described in the context of a wireless communication system. Examples of antenna modules and groups of antenna elements are then discussed for some aspects. Aspects of the present disclosure are further illustrated and described with reference to apparatus diagrams, system diagrams, and flowcharts related to signaling associated with beam correlation across millimeter wave frequency bands.

[0079] Figure 1 An example of a wireless communication system 100 supporting signaling associated with beam correlation across millimeter wave frequency bands in accordance with aspects of the present disclosure is illustrated. The wireless communication system 100 may include one or more base stations 105, one or more UEs 115, and a core network 130. In some examples, the wireless communication system 100 may 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 communication system 100 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.

[0080] The base stations 105 may be dispersed throughout a geographic area to form the wireless communication system 100 and may be different forms of devices or devices with different capabilities. The base stations 105 and the UEs 115 may communicate wirelessly via one or more communication links 125. Each base station 105 may provide a coverage area 110, and the UEs 115 and the base stations 105 may establish one or more communication links 125 over the coverage area 110. The coverage area 110 may be an example of a geographic area over which the base stations 105 and the UEs 115 may support signal communication according to one or more radio access technologies.

[0081] The UEs 115 may be dispersed throughout the coverage area 110 of the wireless communication system 100, and each UE 115 may be stationary or mobile, or stationary and mobile at different times. The UEs 115 may be different forms of devices or devices with different capabilities. Some example UEs 115 are illustrated in Figure 1 . The UEs 115 described herein may be capable of communicating with various types of devices, such as other UEs 115, base stations 105, or network equipment (e.g., core network nodes, relay devices, repeater devices, CPEs, integrated access and backhaul (IAB) nodes, router devices, or other network equipment), as shown in Figure 1 .

[0082] Each base station 105 can communicate with the core network 130, communicate with each other, or both. For example, the base station 105 can interface with the core network 130 via one or more backhaul links 120 (e.g., via S1, N2, N3, or other interfaces). The base stations 105 can communicate with each other directly (e.g., directly between the base stations 105), or indirectly (e.g., via the core network 130), or directly and indirectly over the backhaul link 120 (e.g., via X2, Xn, or other interfaces). In some examples, the backhaul link 120 can be or include one or more wireless links. In some examples, one or more base stations 105, when acting as IAB nodes, can provide backhaul connectivity between another base station 105 and the core network 130 via the backhaul link 160.

[0083] One or more of the base stations 105 described herein can include or can be referred to by those of ordinary skill in the art as a base transceiver station, radio base station, access point, radio transceiver, B node, evolved B node (eNB), next-generation B node, or gigabit B node (any of which can be referred to as a gNB), home B node, home evolved B node, or other suitable terms.

[0084] The UE 115 can include or can be referred to as a mobile device, wireless device, remote device, handheld device, or subscriber device, or some other suitable term, where "device" can also be referred to as a unit, station, terminal, or client, etc. The UE 115 can also include or can be referred to as a personal electronic device, such as a cellular phone, personal digital assistant (PDA), tablet computer, laptop computer, or personal computer. In some examples, the UE 115 can include or be referred to as a wireless local loop (WLL) station, Internet of Things (IoT) device, Internet of Everything (IoE) device, or machine type communication (MTC) device, etc., which can be implemented in various objects such as appliances, vehicles, meters, etc.

[0085] The UE 115 described herein can be capable of communicating with various types of devices, such as other UEs 115 that can sometimes act as relays, routers, or CPEs, as well as base stations 105 and network equipment including macro eNBs or gNBs, small cell eNBs or gNBs, IAB nodes, relay base stations, etc., as Figure 1 shown.

[0086] UE 115 and base station 105 may communicate wirelessly with each other via one or more communication links 125 over one or more carriers. The term "carrier" may refer to a set of radio frequency spectrum resources having a defined physical layer structure for supporting communication link 125. For example, a carrier for communication link 125 may include a portion (e.g., bandwidth part (BWP)) of a radio frequency spectrum band that operates according to one or more physical layer channels for a given radio access technology (e.g., LTE, LTE-A, LTE-A Pro, NR). Each physical layer channel may carry acquisition signaling (e.g., synchronization signals, system information), control signaling for coordinating carrier operation, user data, or other signaling. The wireless communication system 100 may support communicating with UE 115 using carrier aggregation or multi-carrier operation. UE 115 may be configured to have multiple downlink component carriers and one or more uplink component carriers according to a carrier aggregation configuration. Carrier aggregation may be used in conjunction with both frequency division duplex (FDD) and time division duplex (TDD) component carriers.

[0087] The communication link 125 shown in the wireless communication system 100 may include an uplink transmission from UE 115 to base station 105, or a downlink transmission from base station 105 to UE 115. A carrier may carry downlink or uplink communication (e.g., in FDD mode), or may be configured to carry both downlink communication and uplink communication (e.g., in TDD mode).

[0088] A carrier may be associated with a particular bandwidth of the radio frequency spectrum, and in some examples, the carrier bandwidth may be referred to as the "system bandwidth" of the carrier or the wireless communication system 100. For example, the carrier bandwidth may be one of several determined bandwidths (e.g., 1.4, 3, 5, 10, 15, 20, 40, or 80 megahertz (MHz)) of a carrier for a particular radio access technology. Devices of the wireless communication system 100 (e.g., base station 105, UE 115, or both) may have a hardware configuration that supports communication over a particular carrier bandwidth, or may be configurable to support communication over one of a set of carrier bandwidths. In some examples, the wireless communication system 100 may include a base station 105 or UE 115 that supports simultaneous communication via carriers associated with multiple carrier bandwidths. In some examples, each served UE 115 may be configured to operate over a portion (e.g., sub-band, BWP) or all of a carrier bandwidth.

[0089] The signal waveform transmitted on the carrier may include 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 a system using MCM technology, a resource element may include a code element period (e.g., the duration of a modulation code element) and a subcarrier, where the code element period and the subcarrier spacing are inversely related. The number of bits carried by each resource element may depend on the modulation scheme (e.g., the order of the modulation scheme, the coding rate of the modulation scheme, or both). Thus, the more resource elements received by UE 115 and the higher the order of the modulation scheme, the higher the data rate of UE 115 can be. Wireless communication resources may refer to a combination of radio frequency spectrum resources, time resources, and spatial resources (e.g., spatial layers or beams), and the use of multiple spatial layers may further improve the data rate or data integrity of communication with UE 115.

[0090] The time interval of the base station 105 or the UE 115 can be expressed as a multiple of a basic time unit, and the basic time unit can be, for example, a sampling period T s =1 / (Δf max ·N f ) seconds, where Δf max It can represent the maximum supported subcarrier spacing, and N f The maximum supported discrete Fourier transform (DFT) size may be indicated. Time intervals of communication resources may be organized according to radio frames, each having a specified duration (e.g., 10 milliseconds (ms)). Each radio frame may be identified by a system frame number (SFN) (e.g., ranging from 0 to 1023).

[0091] Each frame may include a plurality of consecutively numbered subframes or time slots, and each subframe or time slot may have the same duration. In some examples, a frame may be divided into subframes (e.g., in the time domain), and each subframe may be further divided into a number of time slots. Alternatively, each frame may include a variable number of time slots, and the number of time slots may depend on the subcarrier spacing. Each time slot may include a number of code element periods (e.g., depending on the length of the cyclic prefix added before each code element period). In some wireless communication systems 100, a time slot may be further divided into a plurality of mini-time slots containing one or more code elements. Excluding the cyclic prefix, each code element period may contain one or more (e.g., N f The duration of a symbol period may depend on the subcarrier spacing or the operating band.

[0092] A subframe, a time slot, a mini-slot, or a symbol can be the smallest scheduling unit (e.g., in the time domain) of the wireless communication system 100 and can be referred to as a transmission time interval (TTI). In some examples, the duration of the TTI (e.g., the number of symbol periods in the TTI) can be variable. Additionally or alternatively, the smallest scheduling unit of the wireless communication system 100 can be dynamically selected (e.g., in bursts of shortened TTIs (sTTIs)).

[0093] Physical channels can be multiplexed on a carrier according to various techniques. The physical control channel and the physical data channel can be multiplexed on a downlink carrier using, for example, time-division multiplexing (TDM) techniques, frequency-division multiplexing (FDM) techniques, or one or more of hybrid TDM-FDM techniques. A control region (e.g., a control resource set (CORESET)) for the physical control channel can be defined by the number of symbol periods and can extend across the system bandwidth of the carrier or a subset of the system bandwidth. 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 a 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 in one or more aggregation levels arranged in a cascaded manner. The aggregation level for a control channel candidate can refer to the number of control channel resources (e.g., control channel elements (CCEs)) associated with the encoded information for a control information format having a given payload size. The search space set can include a common search space set configured to send control information to multiple UEs 115 and a UE-specific search space set for sending control information to a specific UE 115.

[0094] In some examples, the base station 105 can be movable and thus provide communication coverage for a mobile geographic coverage area 110. In some examples, different geographic coverage areas 110 associated with different technologies can overlap, but 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 communication system 100 can include, for example, a heterogeneous network where different types of base stations 105 use the same or different radio access technologies to provide coverage for various geographic coverage areas 110.

[0095] Some UEs 115 (such as MTC or IoT devices) can be low-cost or low-complexity devices and can provide automated communication between machines (e.g., via machine-to-machine (M2M) communication). M2M communication or MTC can refer to data communication technologies that allow devices to communicate with each other or with the base station 105 without human intervention. In some examples, M2M communication or MTC can include communication from devices integrated with sensors or meters to measure or capture information and relay such information to a central server or application that utilizes the information or presents the information to a person interacting with the application. Some UEs 115 can be designed to collect information or implement automated behavior of machines or other devices. Examples of applications for MTC devices include: smart metering, inventory monitoring, water level monitoring, equipment monitoring, healthcare monitoring, wilderness survival monitoring, weather and geographical event monitoring, queue management and tracking, remote security sensing, physical access control, and transaction-based commercial charging.

[0096] The wireless communication system 100 can be configured to support ultra-reliable communication or low-latency communication or various combinations thereof. For example, the wireless communication system 100 can be configured to support ultra-reliable low-latency communication (URLLC) or mission-critical communication. The UE 115 can be designed to support ultra-reliable, low-latency, or critical functions (e.g., mission-critical functions). Ultra-reliable communication 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.

[0097] In some examples, the UE 115 can also be capable of directly communicating with other UEs 115 on a device-to-device (D2D) communication link 135 (e.g., using peer-to-peer (P2P) or D2D protocols). One or more UEs 115 utilizing D2D communication can be within the geographical coverage area 110 of the base station 105. Other UEs 115 in such a group can be outside the geographical coverage area 110 of the base station 105 or for other reasons unable to receive transmissions from the base station 105. In some examples, groups of UEs 115 communicating via D2D communication can utilize a one-to-many (1:M) system, where each UE 115 transmits to every other UE 115 in the group. In some examples, the base station 105 facilitates the scheduling of resources for D2D communication. In other cases, D2D communication is performed between the UEs 115 without involving the base station 105.

[0098] 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., UE 115). In some examples, vehicles can communicate using vehicle-to-everything (V2X) communication, vehicle-to-vehicle (V2V) communication, or some combination of these communications. Vehicles can signal information related to traffic conditions, signal scheduling, weather, safety, emergencies, or any other information related to the V2X system. In some examples, vehicles in a V2X system can communicate with roadside infrastructure (such as roadside units), or with the network, or with both, using vehicle-to-network (V2N) communication via one or more network nodes (e.g., base station 105).

[0099] 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 a 5G core (5GC), and the EPC or 5GC can include at least one control plane entity (e.g., a mobility management entity (MME), an access and mobility management function (AMF)) that manages access and mobility, and at least one user plane entity (e.g., a serving gateway (S-GW), a packet data network (PDN) gateway (P-GW), or a user plane function (UPF)) that routes packets or interconnects to external networks. The control plane entity can manage non-access stratum (NAS) functions, such as the mobility, authentication, and bearer management of a UE 115 served by a base station 105 associated with the core network 130. User IP packets can be transmitted through the user plane entity, which can provide IP address allocation and other functions. The user plane entity can be connected to the network operator IP service 150. The operator IP service 150 can include access to the Internet, an intranet, an IP multimedia subsystem (IMS), or a packet-switched streaming service.

[0100] Some network devices (such as 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 each UE 115 through one or more other access network transmission entities 145, which can be referred to as radio heads, intelligent radio heads, or transmit / receive points (TRPs). Each access network transmission entity 145 can include one or more antenna panels. In some configurations, the 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 combined into a single network device (e.g., base station 105).

[0101] The wireless communication system 100 can operate using one or more frequency bands in the range of 300 megahertz (MHz) to 300 gigahertz (GHz). The division from 300 MHz to 3 GHz can be referred to as the ultra-high frequency (UHF) division or the decimeter band because the wavelengths are in the range of approximately one decimeter to one meter in length. UHF waves can be blocked or redirected by buildings and environmental features, but these waves can sufficiently penetrate various structures for macrocells to provide services to UEs 115 located indoors. Compared to transmissions using smaller frequencies and longer waves in the high frequency (HF) or very high frequency (VHF) portions of the spectrum below 300 MHz, UHF wave transmissions can be associated with smaller antennas and shorter ranges (e.g., less than 100 kilometers).

[0102] The wireless communication system 100 can also operate in the super-high frequency (SHF) division of the frequency band from 3 GHz to 30 GHz (also referred to as the centimeter band) or in the extremely high frequency (EHF) division of the spectrum (e.g., from 30 GHz to 300 GHz) (also referred to as the millimeter band). In some examples, the wireless communication system 100 can support millimeter wave (mmW) communication between the UE 115 and the base station 105, and the EHF antennas of the corresponding devices can be smaller and more closely spaced than UHF antennas. In some examples, this can facilitate the use of antenna arrays within the devices. However, the propagation of EHF transmissions can experience even greater atmospheric attenuation and shorter ranges than SHF or UHF transmissions. The techniques disclosed herein can be employed across transmissions using one or more different frequency divisions, and the use of frequency bands designated across these frequency divisions can vary by country or regulatory body.

[0103] The electromagnetic spectrum is typically subdivided into various classes, frequency bands, channels, etc. based on frequency / wavelength. In 5G NR, two initial operating frequency bands have been identified as frequency range designations FR1 (410 MHz – 7.125 GHz) and FR2 (24.25 GHz – 52.6 GHz). It should be understood that although a portion of FR1 is greater than 6 GHz, in various documents and articles, FR1 is typically (interchangeably) referred to as the “sub-6 GHz band”. Similar naming issues sometimes arise with respect to FR2, which is typically (interchangeably) referred to as the “millimeter wave” band in various documents and articles, although it is different from the EHF band (30 GHz – 300 GHz) identified by the International Telecommunication Union (ITU) as the “millimeter wave” band.

[0104] The frequency between FR1 and FR2 is generally referred to as the mid-band frequency. Recent 5G NR research has identified the operating bands of these mid-band frequencies as frequency range designations FR3 (7.125 GHz – 24.25 GHz). Bands falling within FR3 can inherit FR1 characteristics and / or FR2 characteristics, and thus can effectively extend the features of FR1 and / or FR2 into the mid-band frequencies. Additionally, higher frequency bands are currently being explored to extend 5G NR operation above 52.6 GHz. For example, three higher operating bands have been identified as frequency range designations FR4a or FR4-1 (52.6 GHz – 71 GHz), FR4 (52.6 GHz – 114.25 GHz), and FR5 (114.25 GHz – 300 GHz). Each of these higher frequency bands falls within the EHF band.

[0105] Taking the above aspects into account, unless specifically stated otherwise, it should be understood that if used herein, terms such as "sub-6 GHz" can generally represent frequencies that can be less than 6 GHz, can be within FR1, or can include mid-band frequencies. Additionally, unless specifically stated otherwise, it should be understood that if used herein, terms such as "millimeter wave" can generally represent frequencies that can include mid-band frequencies, can be within FR2, FR4, FR4-a or FR4-1, and / or FR5, or can be within the EHF band.

[0106] Wireless communication system 100 can utilize both licensed and unlicensed radio frequency bands. For example, wireless communication system 100 can employ licensed-assisted access (LAA), LTE-unlicensed (LTE-U) radio access technology, or NR technology in an unlicensed band such as the 5 GHz industrial, scientific, and medical (ISM) band. When operating in an unlicensed radio frequency band, devices such as base station 105 and UE 115 can employ carrier sensing for collision detection and avoidance. In some examples, operation in the unlicensed band can be based on a carrier aggregation configuration (e.g., LAA) in coordination with a component carrier operating in a licensed band. Operation in the unlicensed spectrum can include downlink transmission, uplink transmission, P2P transmission, or D2D transmission, etc. The carrier aggregation configuration can be associated with a first component carrier and a second component carrier.

[0107] Base station 105 or UE 115 may be equipped with multiple antennas, which can be used to adopt techniques such as transmit diversity, receive diversity, multiple-input multiple-output (MIMO) communication, or beamforming. The antennas of base station 105 or UE 115 may be located within one or more antenna arrays or antenna panels that can support MIMO operation or transmit or receive beamforming. For example, one or more base station antennas or antenna arrays may co-locate at an antenna assembly (such as an antenna tower). In some examples, the antennas or antenna arrays associated with base station 105 may be located at different geographical locations. Base station 105 may have an antenna array that has several rows and columns of antenna ports for beamforming that base station 105 can use to support communication with UE 115. Similarly, UE 115 may have one or more antenna arrays that can support various MIMO or beamforming operations. Additionally or alternatively, the antenna panel may support radio frequency beamforming for signals transmitted via the antenna ports.

[0108] Base station 105 or UE 115 can use MIMO communication to utilize multipath signal propagation and improve spectral efficiency by transmitting or receiving multiple signals via different spatial layers. Such techniques may be referred to as spatial multiplexing. For example, the transmitting device may transmit multiple signals via different antennas or different combinations of antennas. Similarly, the receiving device may receive multiple signals via different antennas or different combinations of antennas. 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). Different spatial layers may be associated with different antenna ports for channel measurement and reporting. MIMO techniques include single-user MIMO (SU-MIMO), where multiple spatial layers are transmitted to the same receiving device; and multi-user MIMO (MU-MIMO), where multiple spatial layers are transmitted to multiple devices.

[0109] Beamforming (which may also be referred to as spatial filtering, directional transmission, or directional reception) is a signal processing technique that can be used at a transmitting device or a receiving device (e.g., base station 105, UE 115) to shape or direct an antenna beam (e.g., transmit beam, receive beam) along a spatial path between the transmitting device and the receiving device. Beamforming can be achieved by combining the signals conveyed via the antenna elements of an antenna array such that some signals propagating in a particular orientation relative to the antenna array experience constructive interference while other signals experience destructive interference. The adjustment of the signals conveyed via the antenna elements may include the transmitting device or the receiving device applying an amplitude offset, a phase offset, or both to the signals carried via the antenna elements associated with the device. The adjustment associated with each antenna element may be defined by a set of beamforming weights associated with a particular orientation (e.g., relative to the antenna array of the transmitting device or the receiving device, or relative to some other orientation).

[0110] Base station 105 or UE 115 may use beam sweeping techniques as part of beamforming operations. For example, base station 105 may use multiple antennas or antenna arrays (e.g., antenna panels) to perform beamforming operations for directional communication with UE 115. Some signals (e.g., synchronization signals, reference signals, beam selection signals, or other control signals) may be transmitted by base station 105 multiple times in different directions. For example, base station 105 may transmit signals according to different beamforming weight sets associated with different transmission directions. Transmissions in different beam directions may be used (e.g., by the transmitting device such as base station 105 or the receiving device such as UE 115) to identify the beam direction used by base station 105 for later transmission or reception.

[0111] Some signals (such as data signals associated with a particular receiving device) may be transmitted by base station 105 in a single beam direction (e.g., the direction associated with the receiving device such as UE 115). In some examples, the beam direction associated with transmission in a single beam direction may be determined based on signals transmitted in one or more beam directions. For example, UE 115 may receive one or more signals transmitted by base station 105 in different directions and may report to base station 105 an indication of the signal received by UE 115 with the highest signal quality or other acceptable signal quality.

[0112] In some examples, transmissions performed by a device (e.g., by base station 105 or UE 115) may use 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 base station 105 to UE 115). UE 115 may report feedback indicating precoding weights for one or more beam directions, and the feedback may correspond to a configured number of beams across the system bandwidth or one or more subbands. Base station 105 may transmit reference signals that may or may not be precoded (e.g., cell-specific reference signals (CRS), channel state information (CSI) reference signals (CSI-RS)). UE 115 may provide feedback for beam selection, which may be a precoding matrix indicator (PMI) or codebook-based feedback (e.g., multi-panel type codebook, linear combination type codebook, port selection type codebook). Although these techniques are described with reference to signals transmitted by base station 105 in one or more directions, UE 115 may use similar techniques for transmitting signals multiple times in different directions (e.g., for identifying the beam direction used by UE 115 for subsequent transmission or reception) or for transmitting signals in a single direction (e.g., for transmitting data to a receiving device).

[0113] A receiving device (e.g., UE 115) may attempt multiple receive configurations (e.g., directional listening) when receiving various signals (such as synchronization signals, reference signals, beam selection signals, or other control signals) from a base station 105. For example, the receiving device may attempt multiple receive directions by receiving via different antenna sub-arrays, processing received signals according to different antenna sub-arrays, 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 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, the 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 the highest signal strength, highest signal-to-noise ratio (SNR), or other acceptable signal quality based on listening according to multiple beam directions).

[0114] UE 115 may include one or more antenna modules, which may include a relatively large number of antenna elements for mmW communication, and UE 115 may be an example of the first wireless device discussed herein. UE communication manager 101 may manage mmW communication and, in some cases, may receive a carrier aggregation configuration from a second wireless device, the carrier aggregation configuration including a first mmW band and a second mmW band. UE communication manager 101 may determine beam correlation parameters based on the carrier aggregation configuration received from the second wireless device. UE communication manager 101 may determine a first beam in the first mmW band and a second beam in the second mmW band and may use the first beam and the second beam to communicate with the second wireless device (such as base station 105).

[0115] One or more base stations 105 may be an example of the second wireless device discussed herein and may include a base station communication manager 102. Base station communication manager 102 may transmit the carrier aggregation configuration to UE 115 and may determine beam correlation parameters based on inter-band carrier aggregation parameters. Base station communication manager 102 may communicate with UE 115 in an inter-band carrier aggregation mode using a first beam on the first mmW band and a second beam on the second mmW band, where the first beam and the second beam are based on the beam correlation parameters.

[0116] Figure 2An example of a wireless communication device 200 with multiple antenna arrays that supports signaling for beam correlation across millimeter-wave frequency bands in accordance with aspects of the present disclosure is described. In some examples, the wireless communication device 200 with multiple antenna arrays may implement aspects of the wireless communication system 100. In this example, the wireless communication device may be a UE 115-a, although in other scenarios, the wireless communication device may be a different device, such as a CPE, a relay device, a router, a repeater, or an IAB node.

[0117] In this example, the UE 115-a includes several different antenna modules, including a first antenna module 205, a second antenna module 210, and a third antenna module 215. Each of the antenna modules 205 to 215 may include several sub-arrays 220 of antenna elements. In this example, the first antenna module 205 may include four sub-arrays 220, including a first sub-array 220-a, a second sub-array 220-b, a third sub-array 220-c, and a fourth sub-array 220-d. In this example, each sub-array 220 may include 16 individual antenna elements 225 arranged in a 4x4 array configuration. In some cases, each antenna element 225 may be a patch antenna element configured to communicate in a high-frequency band mmW deployment. In some cases, the spacing between the antenna elements 225 within each sub-array 220 may be configured to provide efficient analog beamforming at the wavelength associated with high-frequency band mmW communication (e.g., in FR4). Additionally, in this example, each sub-array 220 may include an associated radio frequency integrated circuit (RFIC) 230.

[0118] In Figure 2 the example, the second antenna module 210 may also include multiple sub-arrays 235, including a fifth sub-array 235-a and a sixth sub-array 235-b. In this example, the fifth sub-array 235-a includes eight antenna elements arranged in a 4x2 array configuration, while the sixth sub-array 235-b includes four antenna elements arranged in a 4x1 array configuration. In this case, a single RFIC (RFIC5) 240 may be coupled to the sub-arrays 235, although multiple RFICs may be used, or the RFIC may be shared with one or more other antenna modules 205 or 215. Although the antenna module 210 is illustrated as having multiple sub-arrays 235 of different sizes, other examples may have the same number of sub-arrays 235, each of the same size (e.g., four 4x4 antenna sub-arrays similar to those illustrated in the first antenna module 205). The techniques discussed herein may be applied to any number of antenna modules 205 to 215, any number of sub-arrays included in each antenna module, any number of antenna elements in each sub-array, or any combination thereof.

[0119] As discussed herein, a wireless device may use multiple RFICs 230 and associated antenna sub-arrays 220 at different times. For example, in the Figure 2 scenario where the wireless device is UE 115-a, it may be desirable to operate using only a subset of antenna modules 205-215, only a subset of antenna sub-arrays 220 and associated RFICs 230, only a subset of antenna elements 225 within one or more sub-arrays 220, or any combination thereof. Such operations may allow UE 115-a to manage power consumption to reduce, for example, the power used by RF components. In other scenarios, as an addition to or in place of power consumption considerations, UE 115-a may also determine one or more MPE limits, one or more thermal limits, or a combination thereof such that it is desirable to use only certain groups of antenna elements 225 of one or more sub-arrays 220. Thus, even though a relatively large number of antenna elements 225 may be available at UE 115-a, not all elements may be used at any given time. For example, UE 115-a may have a total of N antenna elements 225 across each of different antenna modules 205-215 and may select K antenna elements 225 for communication, resulting in N C K possibilities, which can result in a relatively large number of combinations of different antenna elements 225. Thus, in some scenarios, UE 115-a may select a relatively small list of antenna groups available at a given time (e.g., based on power consumption, MPE considerations, thermal considerations, etc.). UE 115-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 based on the number of antenna elements in one or more antenna groups. Then, communication may be established using one of the indicated antenna groups, based on the one or more transmission parameters and the number of antenna elements in that antenna group. Reference Figure 3 and Figure 4 discuss various examples of indication of transmission control parameters for one or more antenna groups and procedures based on such indications.

[0120] Figure 3 illustrates an example of a wireless communication system 300 that supports signaling for beam correlation across millimeter wave frequency bands in accordance with aspects of the present disclosure. In some examples, wireless communication system 300 may implement aspects of wireless communication system 100. In some examples, wireless communication system 300 may include UE 115-b and base station 105-a, which may be referred to Figures 1 - 2Examples of the described UE 115 and base station 105 are provided. Additionally, UE 115-b may be an example of a first wireless device, and base station 105-a may be an example of a second wireless device. UE 115-b and base station 105-a may communicate using beamformed communication, where UE 115-b transmits uplink communication 305 to base station 105-a, and base station 105-a transmits downlink communication 310 to UE 115-b.

[0121] In some cases, UE 115-b may include a relatively large number of antenna elements, which may be distributed across one or more antenna subarrays and one or more antenna modules, such as discussed with reference to Figure 2 UE 115-b may transmit antenna selection information 315 to base station 105-a, which indicates one or more different antenna groups of transmission beams that have been selected and are preferably used for establishing mmW communication at UE 115-b, and one or more transmission control parameters associated with the one or more antenna groups. The one or more transmission control parameters may be at least partially based on the number of antenna elements in the associated antenna group. In some cases, the one or more transmission control parameters may be mapped to the number of antenna elements in the antenna group, one or more attributes of the transmission, or a combination thereof. For example, MCS-dependent phase noise compensation may be mapped to a particular configured MCS and the number of antenna elements for transmission. In cases where such a mapping can be implemented, the mapping may be pre-configured or provided to UE 115-b when configuring connection establishment or re-establishment.

[0122] In some cases, base station 105-a may initiate one or more procedures based on antenna selection information 315, such as a beam training procedure based on the indicated antenna group, where different base station beams 325 and different UE beams 330 may be tested and measured to identify preferred beams for communication. For example, UE 115-b may use multiple UE beams 330 to measure the reference signals of multiple base station beams 325 and select a preferred beam, and provide feedback to base station 105-a on the selected beam, such as through the selected TCI state. In some cases, UE 115-b may transmit a CSI measurement report to base station 105-a based on the measurements of the beam training procedure. Additionally, in some cases, once a preferred beam is selected, UE 115-b may transmit one or more transmission control parameters related to the selected beam and the associated antenna element group, which may then be used by base station 105-a to allocate resources to UE 115-b, schedule communication for UE 115-b, set a digital beamforming codebook, set one or more power control parameters, or any combination thereof.

[0123] In some cases, transmission control parameters may include, for example, the array size of one or more antenna element groups (which may also be referred to as sets), the array geometry of one or more antenna element sets, the beam pattern of one or more antenna element sets, or any combination thereof. Using different antenna element sets, the digital beamforming codebook for communication between UE 115-b and base station 105-a can be configured to be specific to the particular antenna group used for communication and can be indicated in the digital beamforming configuration 320 provided by base station 105-a. In some examples, the digital beamforming configuration 320 can be provided in downlink control information (DCI) that has a resource grant provided to UE 115-b for uplink or downlink communication. Additionally, for controlling power, due to the effective isotropic radiated power (EIRP) limit that can be applied at UE 115-b, the maximum transmit power at UE 115-b (e.g., P cmax ) can depend on the antenna element group used in the communication, and different array sizes can result in different array gains and thus affect P cmax . Additionally, phase noise compensation that depends on the modulation and coding scheme (MCS) can depend on the antenna array size. The transmission control parameters can provide information related to P cmax , array information, or a combination thereof, which can be used to determine the MCS, digital beamforming codebook, MCS-dependent phase noise compensation, or any combination thereof for communication based on the number of antenna elements in the antenna element group to be used for communication. Additionally, base station 105-a can use the indication of the antenna group to assist in scheduling based on the data rate and antenna gain of one or more antenna element groups used for communication.

[0124] In some cases, a wireless device may perform inter-band carrier aggregation across frequency bands in FR4 and FR2. The base station 105-a may configure beam correlation information (e.g., carrier aggregation configuration parameter 335) across TCI states in different mmW frequency bands to allow the UE 115-a to determine the correlation (e.g., beam correlation parameter) in the direction with co-directional beams in two mmW frequency bands using inter-band carrier aggregation. For example, the UE 115-b may transmit a beam training signal (e.g., sounding reference signal (SRS)) at a lower carrier frequency (e.g., 28 GHz). The base station 105-a may process the beam training signal at 28 GHz on the first radio frequency (RF) chain and process the beam training signal at 60 GHz on the second RF chain. The base station 105-a may determine the carrier aggregation configuration parameter 335 based on the direction with the strongest signal for both the first RF chain and the second RF chain. The base station 105-a may transmit the carrier aggregation configuration parameter 335 to the UE 115-b to determine the beams for communication at the lower carrier frequency and the higher carrier frequency (e.g., 60 GHz) based on the beam training procedure.

[0125] The base station 105-a may send the carrier aggregation configuration as a configuration message. In a first example, the configuration message may be a broadcast message to one or more wireless devices including at least the UE 115-b. In some cases, the configuration may be a wireless device specific message for the UE 115-b. In a second example, the configuration message may be specific to the bandwidth parts of the lower mmW frequency band and the higher mmW frequency band. In a third example, the configuration message may be specific to the TCI states used by the base station 105-a in the higher mmW frequency band and the lower mmW frequency band. In a fourth example, the configuration message may include a weighted average metric of the TCI state groups used by the base station 105-a in the higher mmW frequency band and the lower mmW frequency band. The UE 115-b may determine the weights for use with the weighted average metric and the TCI of the beams used in determining the weighted average. In some cases, the configuration message may be a combination of the first to fourth examples.

[0126] In some examples, the UE 115-b may perform inter-band carrier aggregation across two frequency bands. The UE 115-b may determine the beam correlation parameter based on the carrier aggregation configuration parameter 335. In some cases, the UE115-b may determine a first beam on the lower mmW frequency band and a second beam on the higher mmW frequency band for communication with the base station 105-a (e.g., simultaneous communication across two frequency bands) based on the beam correlation parameter.

[0127] Figure 4An example of a wireless communication system 400 that supports signaling for beam correlation across millimeter wave frequency bands in accordance with aspects of the present disclosure is described. In some examples, the wireless communication system 400 may implement aspects of the wireless communication system 100 or 300. The wireless communication system 400 may be implemented by a first wireless device 405 and a second wireless device 410 as described herein. Alternative examples may be implemented, where some steps are performed in a different order than described or not performed at all. In some cases, the steps may include additional features not mentioned below, or further steps may be added.

[0128] The wireless communication system 400 may include a first device 405 (e.g., a transmitting device, a reference signal transmitter) and a second device 410 (e.g., a receiving device, a reference signal transmitter), where the first device 405 and the second device 410 may refer to various types of devices according to different configuration types. For example, when the reference signal described is associated with a downlink transmission, the first device 405 may be the base station 105 and the second device 410 may be the UE 115. When the reference signal is associated with an uplink transmission, the first device 405 may be the UE 115 and the second device may be the base station 105. When the reference signal is associated with a sidelink or D4D or M4M transmission, the first device 405 may be the first UE 115 and the second device may be the second UE. When the reference signal is associated with an IAB transmission, the first device 405 may be the first base station 105 and the second device may be the second base station 105. In other examples, the first device 405 and the second device 410 may refer to these or other types of devices that may perform techniques for beam correlation assessment in accordance with the examples disclosed herein. In some examples, the first device 405, the second device 410, or both may be referred to as millimeter wave devices.

[0129] The wireless communication system 400 may be configured to communicate according to various frequency bands, which may include licensed bands or unlicensed or shared bands. In one example, a frequency band may refer to a frequency range (FR), which may include a set of frequency channels (e.g., a set of ARFCNs), and such frequency ranges may not overlap in the frequency domain. For example, the wireless communication system 400 may support communication using the following frequency ranges: a frequency range FR1 corresponding to a frequency band between 410 MHz and 7.145 GHz, a frequency range FR4 corresponding to a frequency band between 44.450 GHz and 54.600 GHz, a frequency range FR4 corresponding to a frequency band between 54.6 GHz and 71 GHz or 114.45 GHz, or various combinations of FR1, FR4, FR4, or other frequency ranges.

[0130] The first device 405 and the second device 410 may each be configured with a multi-antenna array that supports directional transmission, directional reception, or both. In some examples, the first device 405 or the second device 410 may be configured with a first multi-antenna array associated with one frequency band and a second multi-antenna array for another frequency band. Such a configuration may be an example of a device with different RF chains for different frequency bands, but the different RF chains may additionally or alternatively refer to different power amplifiers (PAs), different low-noise amplifiers (LNAs), or other components related to RF signal processing. In some examples, the components of the RF chain may be used for communication and for other purposes. For example, some automotive applications may include a radar system that supports position or proximity detection, and such a radar system may additionally be used to perform communication in a radar frequency band (e.g., the 80 GHz frequency band), where such communication may include an inter-band carrier configuration that includes the radar frequency band and another frequency band. Although some examples of the first device 405 or the second device 410 may include multiple RF chains that may be respectively associated with (e.g., customized for, calibrated or configured for, corresponding to) different frequency bands, other examples of the first device 405 or the second device 410 may include one RF chain that supports communication on multiple frequency bands.

[0131] The first device 405 and the second device 410 may be configured to support inter-band carrier aggregation, which may refer to simultaneous communication on two or more frequency bands. In one example of inter-band carrier aggregation, simultaneous communication may be supported on a first carrier or channel associated with a first frequency band (e.g., a lower carrier frequency) (referred to herein as band 1) and a second carrier or channel associated with a second frequency band (e.g., a higher carrier frequency) (referred to herein as band 4). For example, signal 420 may represent a transmission using carrier aggregation, which may be inter-band carrier aggregation. Additionally, Figure 4 any signal shown therein may be transmitted using carrier aggregation.

[0132] In some examples, the carriers or channels of band 1 and band 4 may refer to different frequency ranges (e.g., different frequency ranges in FR1, FR4, or FR4). In an illustrative example, communication on band 1 may be associated with a carrier or channel of FR1 (e.g., the 4.9 GHz frequency band), while communication on band 4 may be associated with a carrier or channel of FR4 (e.g., the 48 GHz frequency band). In another example, communication on band 1 may be associated with a carrier or channel of FR4 (e.g., the 48 GHz frequency band), while communication on band 4 may be associated with a carrier or channel of FR4 (e.g., the 39 GHz frequency band, the 60 GHz frequency band).

[0133] In some examples, the carriers or channels of Band 1 and Band 4 may refer to the same frequency range (e.g., the same one of FR1, FR4, or FR4). In an illustrative example, the communication on Band 1 may be associated with the first carrier or channel of FR4 (e.g., the 48 GHz band), while the communication on Band 4 may be associated with the second carrier or channel of FR4 (e.g., the 39 GHz band). In another example, the communication on Band 1 may be associated with the first carrier or channel of FR4 (e.g., the 60 GHz band), while the communication on Band 4 may be associated with the second carrier or channel of FR4 (e.g., the 66 GHz band). Although examples of inter-band carrier aggregation on two bands are provided, the techniques described can be applied to any number of bands used in a carrier aggregation configuration, whether in the same frequency range or in two or more different frequency ranges.

[0134] In some examples of inter-band carrier aggregation, multiple RF chains may be used to direct energy in the same direction or cluster across frequency bands. For example, an inter-band carrier aggregation including the 48 GHz band and the 39 GHz band may include using different RF chains for each band, where such coexistence may include various power or thermal considerations. In some examples, inter-band carrier aggregation may be improved by having well-correlated beams (e.g., receive directions that are similar in direction for different bands from the perspective of the second device 410), and the first device 405 and the second device 410 may support quantification or other evaluation of the correlation between the beams used in the two bands.

[0135] In one example, inter-band carrier aggregation may include the first carrier or channel of the 48 GHz band and the second carrier or channel of the 39 GHz band, and the relatively narrow beam at 39 GHz may be aligned in a different direction (e.g., at the second device 410) from the relatively wide beam at 48 GHz. In some examples, such beam alignment may involve the antennas or RF clusters of the second device 410, which are intended to be excited by the beams at the two frequencies, being aligned in different directions (e.g., due to different antennas or antenna arrays being aligned in different directions from the second device 410). Additionally, the power angular delay profile (PADP) may differ between the 48 GHz band and the 39 GHz band depending on material properties, environmental degradation (e.g., due to oxygen or water vapor along the signal propagation path), fading, obstacles, polarization-related losses, etc., which may be specific to certain bands or sub-bands. Thus, for these and other reasons, the transmissions on different bands may be associated with the directions of the peak received power that are aligned in different directions (e.g., at the second device 410).

[0136] To support various configurations of inter-band carrier aggregation, the wireless communication system 400 may be configured to transmit different reference signals on different frequency bands to support the evaluation of beam correlation or other reception correlation from the perspective of the second device 410. For example, the first device 405 may be configured to transmit a first reference signal 415-a on a carrier or channel of a first frequency band (e.g., band 1) and a second reference signal 415-b on a carrier or channel of a second frequency band (e.g., band 4).

[0137] The first reference signal 415-a and the second reference signal 415-b may be transmitted concurrently, simultaneously, or according to some other degree of overlapping time intervals. For example, the communication using the first frequency band and the second frequency band may be synchronized (e.g., in time, such as inter-band synchronization, inter-cell synchronization, or other synchronization) such that the resource blocks or other allocation intervals of the first frequency band and the second frequency band are aligned in the time domain (e.g., having the same start time, having the same end time, spanning the same duration in time from the perspective of the first device 405 or the second device 410). In some examples, the first reference signal 415-a and the second reference signal 415-b may be transmitted by the first device 405 in the same TTI or a portion thereof (e.g., transmitting the first reference signal 415-a and the second reference signal 415-b in the same symbol duration or symbol period). In some examples, the first reference signal 415-a and the second reference signal 415-b may be transmitted during additional simultaneous durations or during corresponding durations that additionally overlap in time.

[0138] The first reference signal 415-a may be transmitted by the first device 405-a using a first transmit beam 406-a or otherwise transmitted directionally using a first transmission codebook (e.g., an analog or digital codebook associated with the first transmission direction), and the second reference signal 415-b may be transmitted by the first device 405 using a second transmit beam 406-b or otherwise transmitted directionally using a second transmission codebook (e.g., another analog or digital codebook associated with the second transmission direction). Although it may be beneficial for the second device 410 to receive the first reference signal 415-a and the second reference signal 415-b in the same direction or a similar direction (e.g., the reception direction) for inter-band carrier aggregation, the first reference signal 415-a and the second reference signal 415-b may be transmitted in the same direction or different directions. For example, the first transmit beam 406-a and the second transmit beam 406-b may be the same transmit beam, or otherwise aligned in the same direction, or the first transmit beam 406-a and the second transmit beam 406-b may be different transmit beams or otherwise aligned in different directions.

[0139] In various examples, the respective directions for transmitting the first reference signal 415-a and the second reference signal 415-b can be at least partially based on the alignment of different antenna arrays associated with different frequency bands, the directional transmission resolution or granularity associated with transmission on different frequency bands, or other hardware having a processing configuration or capabilities associated with different frequency bands. In some examples, the first device 405 can know the signal propagation differences between the first frequency band and the second frequency band (e.g., at least partially based on beam or codebook training operations between the first device 405 and the second device 410), such as a reflection surface 430 or other signal propagation distortion or attenuation related to the transmission of the first reference signal 415-a but not related to the transmission of the second reference signal 415-b. Thus, in some examples, the first device 405 can correspondingly determine or adjust the transmission direction of one or both of the first reference signal 415-a or the second reference signal 415-b (e.g., to support the receiving direction at the second device 410 being relatively well aligned or otherwise related).

[0140] The type of reference signal employed by the wireless communication system 400 to support the described techniques can be at least partially based on the device type of the first device 405 or the second device 410, or the type of communication between the first device 405 and the second device 410, or a combination thereof. For example, when the first device 405 is a base station 105, or the reference signals 415-a and 415-b are transmitted in a downlink or backhaul configuration or direction, the reference signals 415-a and 415-b can be CSI-RS transmissions performed by the first device 405 on the first frequency band and the second frequency band. In another example, when the first device 405 is a UE 115, or the reference signals 415-a and 415-b are transmitted in an uplink or sidelink configuration or direction, the reference signals 415-a and 415-b can be SRS transmissions performed by the first device 405 on the first frequency band and the second frequency band.

[0141] The hardware configuration used by the first device 405 to transmit the reference signals 415-a and 415-b can be at least partially based on the device type of the first device 405, or the hardware capabilities of the first device 405, or both. For example, the first device 405 can be a UE 115 with a single RF chain, and the first reference signal 415-a and the second reference signal 415-b can be transmitted in a first frequency band and a second frequency band, respectively, using the same single RF chain. In some examples, such transmissions can include applying the same M-sequence, the same Gold sequence, or the same pseudo-random sequence to each of the first reference signal 415-a and the second reference signal 415-b, where such sequences can be selected or applied to support a certain degree of orthogonality between the transmissions. In another example, the first device 405 can be a UE 115 with multiple RF chains, and the first reference signal 415-a and the second reference signal 415-b can be transmitted in a first frequency band and a second frequency band, respectively, using the same RF chain or different RF chains. In other examples, the first device 405 can be a base station 105 with multiple RF chains, and the first reference signal 415-a and the second reference signal 415-b can be transmitted in a first frequency band and a second frequency band, respectively, using the same RF chain or different RF chains. In examples where the first device 405 uses different RF chains for the first reference signal 415-a and the second reference signal 415-b, such transmissions can include applying the same or different M-sequences, the same or different Gold sequences, or the same or different pseudo-random sequences to each of the first reference signal 415-a and the second reference signal 415-b.

[0142] The first reference signal 415-a can be received by the second device 410 using the first receiving beam 411-a or otherwise received directionally using the first receiving codebook (e.g., an analog or digital codebook associated with the first receiving direction), and the second reference signal 415-b can be received by the second device 410 using the second receiving beam 411-b or otherwise received directionally using the second receiving codebook (e.g., another analog or digital codebook associated with the second receiving direction). The reception of the first reference signal 415-a and the second reference signal 415-b can be evaluated at the second device 410, which can include an evaluation of how correlated the beam or direction of the highest received power is between the first reference signal 415-a and the second reference signal 415-b. For example, the second device 410 can receive the first reference signal 415-a, and as part of that reception, the second device 410 can (e.g., explicitly or implicitly) determine the direction (e.g., the direction of the receiving beam 411-a) or codebook associated with the highest received power of the first reference signal 415-a. Similarly, the second device 410 can receive the second reference signal 415-b, and as part of that reception, the second device 410 can (e.g., explicitly or implicitly) determine the direction (e.g., the direction of the receiving beam 411-b) or codebook associated with the highest received power of the second reference signal 415-b.

[0143] The first reference signal 415-a and the second reference signal 415-b may be received concurrently, simultaneously, or according to other degrees of overlapping time intervals. For example, when the first reference signal 415-a and the second reference signal 415-b are transmitted simultaneously, the first reference signal 415-a and the second reference signal 415-b may be received simultaneously (e.g., when the signal propagation delay between the first device 405 and the second device 410 is the same for the first frequency band and the second frequency band). In other examples, when the first reference signal 415-a and the second reference signal 415-b are transmitted simultaneously, the first reference signal 415-a and the second reference signal 415-b may not be received simultaneously (e.g., when the signal propagation delay between the first device 405 and the second device 410 is different for the first frequency band and the second frequency band). However, in various examples (e.g., regardless of whether the first reference signal 415-a and the second reference signal 415-b are transmitted simultaneously), at least a portion of the first reference signal 415-a and the second reference signal 415-b may be received concurrently or during overlapping time intervals. In some cases, the relative delay between receiving the first reference signal 415-a and the second reference signal 415-b may be determined and considered (e.g., applied at the second device 410 to signal processing of the first reference signal 415-a and the second reference signal 415-b or an assessment between the first reference signal 415-a and the second reference signal 415-b). In other examples, the relative signal propagation delay between the first frequency band and the second frequency band may be determined and considered (e.g., at the first device 405), which may include transmitting the first reference signal 415-a and the second reference signal 415-b at different durations to attempt to synchronize their reception (e.g., at the second device 410).

[0144] The type of procedure used by the second device 410 to evaluate the reception direction of the first reference signal 415-a or the second reference signal 415-b may be at least partially based on the device type of the first device 405 or the second device 410, or the type of communication between the first device 405 and the second device 410, or a combination thereof. For example, when the second device 410 is a UE 115, or when the reference signals 415-a and 415-b are transmitted in the downlink direction, the second device 410 may receive signaling (e.g., CSI-RS signaling or other reference signaling) as part of a P-1, P-2, or P-3 signaling or operation sequence that supports beam refinement for transmission and reception between the first device 405 and the second device 410.

[0145] In P-1 signaling, a first device 405 (e.g., base station 105) may transmit using a set of relatively wide transmit beams, and a second device 410 (e.g., UE 115) may receive using one or more relatively wide receive beams, which may support establishing a communication link between the first device 405 and the second device 410. In some examples, P-1 signaling may be used to enable UE measurements of different transmit beams to support selection of a base station or TRP transmit beam, or a UE receive beam. For beamforming at the base station 105 or TRP, P-1 operations may include TRP-internal or TRP-interleaved transmit beam sweeps from a set of different beams (e.g., transmit beams). For beamforming at the UE 115, P-1 operations may include UE receive beam scans from a set of different beams (e.g., receive beams).

[0146] In P-2 signaling, a first device 405 may transmit using a set of relatively narrow transmit beams, and a second device 410 may measure the respective signal strengths of each transmit beam in the set of transmit beams and signal or otherwise indicate a preferred transmit beam in the set of transmit beams. In some examples, P-2 signaling may be used to enable UE measurements of different transmit beams to possibly change a transmit beam (e.g., a TRP-interleaved or TRP-internal transmit beam). In some cases, such a selection may be made from a smaller set of beams than in P-1 for beam refinement. In some examples, P-2 operations may be considered a special case of P-1 operations.

[0147] In P-3 signaling, a first device 405 may transmit using a relatively narrow transmit beam (e.g., a transmit beam selected or indicated by the second device 410), and a second device 410 may measure the respective signal strengths of each receive beam in a set of relatively narrow receive beams, which may or may not be signaled or indicated back to the first device 405. In some examples, P-3 signaling may be used to enable UE measurements of the same transmit beam to change the receive beam at the UE 115 in cases where the UE 115 uses beamforming.

[0148] In some examples, the transmission of the first reference signal 415-a and the second reference signal 415-b can implement aspects of P-1 or P-2 signaling, where the operations of P-1 signaling or P-2 signaling are performed simultaneously (e.g., in the same symbol period) and in different frequency bands (e.g., in BWPs of two or more different frequency bands, in different RBs in the frequency domain). As part of performing P-1 or P-2 operations, the second device 410 (e.g., UE 115) can determine the reception directivity associated with the first reference signal 415-a (e.g., the direction of the first reception beam 411-a) and the reception directivity associated with the second reference signal 415-b (e.g., the direction of the second reception beam 411-b). In some examples according to the described techniques, it can be expected that the second device 410 (e.g., UE 115) has multiple RF chains, and the second device 410 can use these RF chains to process the first reference signal 415-a and the second reference signal 415-b (e.g., separately determine the corresponding reception directions), and estimate or otherwise evaluate the beam correlation metric. If the second device 410 (e.g., UE 115) has only a single RF chain, different procedures can be adopted (e.g., according to U-1 or U-4 signaling or operations). In some cases, the beam correlation metric can be based on receiving the first reference signal on the first beam and the second reference signal on the second beam.

[0149] In another example, when the second device 410 is the base station 105, or when the reference signals 415-a and 415-b are transmitted in the uplink direction, the second device 410 can receive signaling (e.g., SRS signaling or other reference signaling) as part of a sequence of U-1, U-4, or U-3 signaling or operations that support the refinement of the transmit beam and the receive beam between the first device 405 and the second device 410. In some examples, the U-1, U-4, and U-3 signaling or operations can be respectively similar to the P-1, P-2, and P-3 signaling or operations, but with an opposite perspective (e.g., in the uplink direction instead of the downlink direction).

[0150] In some examples, the transmission of the first reference signal 415-a and the second reference signal 415-b can implement aspects of U-1 or U-4 signaling, where the operations of U-1 signaling or U-4 signaling are performed simultaneously (e.g., in the same symbol period) and in different frequency bands (e.g., in BWPs of two or more different frequency bands, in different RBs in the frequency domain). As part of performing U-1 or U-4 operations, the second device 410 (e.g., base station 105) can determine the receive directivity associated with the first reference signal 415-a (e.g., the direction of the first receive beam 411-a) and the receive directivity associated with the second reference signal 415-b (e.g., the direction of the second receive beam 411-b). In some examples according to the described techniques, it can be expected that the second device 410 (e.g., base station 105) has multiple RF chains, and the second device 410 can use these RF chains to process the first reference signal 415-a and the second reference signal 415-b (e.g., separately determine the corresponding receive directions), and estimate or otherwise evaluate the beam correlation metric. In some examples, the first device 405 (e.g., UE 115) may have only a single RF chain, but the example approaches of using U-1 or U-4 signaling or operations can still be applicable at the second device 410 (e.g., base station 105) having multiple RF chains.

[0151] In some examples, the type of procedure used by the second device 410 to evaluate the receive direction of the first reference signal 415-a or the second reference signal 415-b can be at least partially based on the hardware capabilities or configuration of the second device 410. In various examples, the type of procedure used by the second device 410 to determine the directivity for reception on the first frequency band and the second frequency band (e.g., for the first reference signal 415-a and the second reference signal 415-b) can be the same, or the type of procedure used by the second device 410 to determine the directivity for reception on the first frequency band and the second frequency band (e.g., for the first reference signal 415-a and the second reference signal 415-b) can be different, which can be related to the hardware capabilities or configurations supported in the respective frequency bands.

[0152] In one example, the second device 410 may be configured to support digital beamforming for a corresponding frequency band, which may support aspects of performing a directional (e.g., continuous) receive sweep. For example, for one or both of the first frequency band or the second frequency band, the second device may sweep different beam weights to determine a spectrogram of received power relative to the receive direction (e.g., associated with receiving the first reference signal 415-a or receiving the second reference signal 415-b). Accordingly, the second device 410 may determine the direction (e.g., angle) of the peak received power of the corresponding reference signal 415 at least in part based on the corresponding spectrogram. Thus, in some examples, the second device 410 may support a digital beamforming capability that allows searching for peak energy received in different directions. Such techniques may be applied to FR1+FR4 carrier aggregation or FR1+FR4 carrier aggregation, where digital beamforming is possible in one or both of band 1 or band 4, and may support a direct comparison between the determined peak received power angles.

[0153] In another example, the second device 410 may additionally or alternatively be configured to support analog or hybrid beamforming for a corresponding frequency band, which may support aspects of performing a receive codebook sweep. For example, for one or both of the first frequency band or the second frequency band, the second device 410 may sweep different analog receive codebooks to determine the received power associated with each different analog receive codebook (e.g., associated with receiving the first reference signal 415-a or the second reference signal). The codebook having the highest received power for the corresponding reference signal may thus be determined to correspond to the directivity of receiving the corresponding reference signal. In some examples, the second device 410 may sweep different codebooks of the beam to identify a preferred codebook entry using RSRP, SINR, or a combination thereof as a metric for determining the preferred codebook. Thus, in some examples, the second device 410 may support an analog or hybrid beamforming capability that uses beam scanning on an analog or hybrid beamforming codebook.

[0154] Although described in the context of analog receive beamforming, the second device 410 may perform a similar determination by sweeping digital receive codebooks. In some examples, each codebook may be implicitly or explicitly associated with a corresponding receive direction, which may be used to evaluate the correlation between the receive codebooks associated with the peak received power of the first reference signal 415-a and the second reference signal 415-b. For example, f 低 and f 高can be used to represent preferred learning beams or codebooks for two frequency bands at the second device 410. Such techniques can be applied to FR4+FR4 carrier aggregation (e.g., using the 48 GHz band and the 39 GHz band), or FR1+FR4 carrier aggregation (e.g., using the 48 GHz band and the 60 GHz band, using the 39 GHz band and the 39 GHz band).

[0155] In some examples, digital beamforming can be associated with relatively high cost, complexity, power consumption, or thermal considerations (e.g., related to a relatively high number of RF chains), especially at relatively high frequencies. Thus, in some examples of the second device 410, digital beamforming can be supported at a relatively low frequency (e.g., a relatively low frequency band, band 1), and analog beamforming can be supported at a relatively high frequency (e.g., a relatively high frequency band, band 4). In such examples, the corresponding directivity metrics can be normalized between the digital beamforming technique and the analog beamforming technique to support the evaluation of the reception correlation between the first frequency band and the second frequency band. Thus, in some examples, the second device 410 can support beam correlation evaluation based at least in part on a comparison between the digital beamforming capability at the second device 410 and the analog beamforming capability at the second device 410, where the digital beamforming capability is used to determine the direction of the peak received power of the first reference signal 415-a (e.g., using a relatively low frequency band, band 1), and the analog beamforming capability is used to determine the direction of the peak received power of the second reference signal 415-b (e.g., using a relatively high frequency band, band 4).

[0156] The evaluation of beam correlation can be determined (e.g., explicitly or implicitly) based on the separation angle (e.g., Δθ) between the peak received power direction of the first reference signal 415-a and the peak received power direction of the second reference signal 415-b. In some examples, the beam correlation metric can be calculated as the cosine of the angular difference (e.g., from the perspective of the second device 410). For example, the azimuth direction of receiving the first reference signal 415-a at the second device 410 can be determined as θ 频带1 (e.g., as the angle of the peak received power from the received power spectrogram, as the angle corresponding to the codebook associated with the highest received power), and the azimuth direction of receiving the second reference signal 415-b at the second device 410 can be determined as θ 频带4 , and the beam correlation metric can be determined as cos(θ 频带1 –θ 频带4 ).

[0157] In some examples, the elevation angle (e.g., from the perspective of the second device 410) can be considered, where the elevation direction of receiving the first reference signal 415-a can be determined as and the elevation direction for receiving the second reference signal 415-b can be determined as In some examples, considering both azimuth and elevation (e.g., where and represent the azimuth and elevation pairs towards which these beam steering peak energies are directed), the beam correlation metric can be determined as In other words, if and are relatively close, a relatively large beam correlation can be determined, while if and are relatively far apart, a relatively low beam correlation can be determined.

[0158] The first device 405 and the second device 410 can be configured for various aspects of inter-band carrier aggregation based on an evaluation of the beam correlation at the second device 410. For example, when the determined beam correlation metric meets a threshold (e.g., at or above the threshold correlation, indicating a sufficient degree of correlation), it can be advantageous to apply the spectral efficiency of inter-band carrier aggregation in the first and second frequency bands, and the first device 405 and the second device can proceed with inter-band carrier aggregation using the first and second frequency bands. In some examples, the determination to proceed (e.g., comparison with the threshold) can be performed by the second device 410 and signaled to the first device 405 (e.g., signaling that the second device 410 supports configuring or performing inter-band carrier aggregation using the first and second frequency bands). In some examples, the determination to proceed (e.g., comparison with the threshold) can be performed at the first device 405 based on the beam correlation metric communicated from the second device 410, and signaled to the second device 410 (e.g., as an explicit indication of inter-band carrier aggregation by the first device 405, as an implicit indication related to the simultaneous scheduling by the first device 405 in the first and second frequency bands).

[0159] When the determined beam correlation metric does not meet the threshold (e.g., at or below the threshold correlation, indicating an insufficient degree of correlation), the first device 405 and the second device 410 can refrain from performing inter-band carrier aggregation using the first and second frequency bands. For example, when the beam correlation metric does not meet the threshold, communication using different frequency bands may involve imbalanced power between the bands, imbalanced modulation and coding schemes, or other asymmetries, which may degrade the spectral efficiency. In some examples, determining to refrain from performing inter-band carrier aggregation using the first and second frequency bands can include: determining to attempt inter-band carrier aggregation using different frequency bands, or determining to refrain from inter-band carrier aggregation (e.g., until a later time, until the signal propagation conditions change or improve).

[0160] In some examples, when the determined beam correlation metric does not meet a threshold (e.g., is at or below a threshold correlation, indicating an insufficient degree of correlation between directions of peak received power), the second device 410 can re-evaluate reception at different directions to attempt to balance reception using the first and second frequency bands. For example, the techniques described can include: the second device 410 determining sub-optimal reception directions for one or both of the first and second frequency bands, where the sub-optimal reception directions can be relatively well aligned with each other (e.g., more correlated than the peak reception directions). In some examples, although signaling is received with a signal quality lower than the best, such a trade-off can support increased spectral utilization by more efficiently utilizing inter-band carrier aggregation.

[0161] Figure 5 An example of a process flow 500 that supports signaling for beam correlation across millimeter wave frequency bands in accordance with aspects of the present disclosure is illustrated. In some examples, the process flow 500 can implement aspects of the wireless communication system 100 or 300. The process flow 500 can be implemented by a first wireless device 505 (e.g., a UE or CPE) and a second wireless device 510 (e.g., a base station, CPE, relay device, router, repeater, or IAB node), as described herein. Alternative examples can be implemented, where some steps are performed in a different order than described or not performed at all. In some cases, the steps can include additional features not mentioned below, or further steps can be added.

[0162] At 515, the second wireless device 510 can transmit a carrier aggregation configuration for communicating with the first wireless device 505 to the first wireless device 505, the carrier aggregation configuration including at least a first frequency band and a second frequency band. In a first example, the first wireless device 505 can receive a configuration message from the second wireless device 510, the configuration message being a broadcast message to one or more wireless devices including at least the first wireless device 505, a wireless device-specific message for the first wireless device 505, or both. In a second example, the first wireless device 505 can receive a configuration message specific to the bandwidth portions of the first and second frequency bands from the second wireless device 510. In a third example, the first wireless device 505 can receive a configuration message specific to the TCI state used by the second wireless device 510 in the first and second millimeter wave frequency bands from the second wireless device 510. In a fourth example, the first wireless device 505 can receive a configuration message from the second wireless device 510, the configuration message being a weighted average metric of two or more transmission configuration indication states used by the second wireless device 510 in the second and second millimeter wave frequency bands. The first wireless device can determine the weights to be used with the weighted average metric and the TCI of the second beam used in determining the weighted average.

[0163] At 520, the second wireless device 510 may determine beam correlation parameters based on a carrier aggregation configuration. At 525, the first wireless device 505 may determine beam correlation parameters based on the carrier aggregation configuration received from the second wireless device 510.

[0164] At 530, the first wireless device 505 may determine a first beam or a second beam to be used for communication with the second wireless device 510 on a first frequency band or a second frequency band based on the beam correlation parameters.

[0165] At 535, the first wireless device 505 and the second wireless device 510 may communicate in an inter-band carrier aggregation mode using the first beam on a first millimeter wave frequency band and the second beam on a second millimeter wave frequency band. In some examples, the first frequency band (e.g., a frequency band between 24.25 GHz and 52.6 GHz) is a lower millimeter wave frequency band, and the second frequency band (e.g., a frequency greater than 52.6 GHz) is a higher millimeter wave frequency band.

[0166] Figure 6 Block diagram 600 of a device 605 supporting signaling for beam correlation across millimeter wave frequency bands in accordance with aspects of the present disclosure is shown. The device 605 may be an example of aspects of the UE 115 as described herein. The device 605 may include a receiver 610, a communication manager 615, and a transmitter 620. The device 605 may also include a processor. Each of these components may be in communication with each other (e.g., via one or more buses).

[0167] The receiver 610 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 signaling for beam correlation across millimeter wave frequency bands, etc.). The information may be passed to other components of the device 605. The receiver 610 may be an example of aspects of the transceiver 920 described with reference to Figure 9 description. The receiver 610 may utilize a single antenna or an antenna array.

[0168] The communication manager 615 may: receive a carrier aggregation configuration for communicating with a second wireless device from the second wireless device, the carrier aggregation configuration including at least a first frequency band and a second frequency band; determine beam correlation parameters based on the carrier aggregation configuration received from the second wireless device; determine a first beam to be used for communication with the second wireless device on the first frequency band based on the beam correlation parameters; determine a second beam to be used for communication with the second wireless device on the second frequency band based on the beam correlation parameters; and communicate with the second wireless device in an inter-band carrier aggregation mode using the first beam on a first millimeter wave frequency band and the second beam on a second millimeter wave frequency band. The communication manager 615 may be an example of aspects of the communication manager 910 described herein.

[0169] The communication manager 615 may perform various aspects of signaling beam correlation as described herein. The communication manager 615 or its sub-components may be implemented in hardware (e.g., in communication management circuitry). The circuitry may include a 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 this disclosure.

[0170] In another implementation, the communication manager 615 or its sub-components may be implemented in code executed by a processor (e.g., as communication management software or firmware), or any combination thereof. If implemented in code executed by a processor, the functions of the communication manager 615 or its sub-components may be performed by a general-purpose processor, a DSP, an ASIC, an FPGA, or other programmable logic device.

[0171] In some examples, the communication manager 615 may be configured to perform various operations (e.g., receive, determine, transmit, configure) using or otherwise in cooperation with the receiver 610, the transmitter 620, or both.

[0172] The communication manager 615 or its sub-components may be physically located at various locations, including being distributed such that portions of the functionality are implemented by one or more physical components at different physical locations. In some examples, in accordance with various aspects of the present disclosure, the communication manager 615 or its sub-components may be separate and distinct components. In some examples, in accordance with various aspects of the present disclosure, the communication manager 615 or its sub-components may be combined with one or more other hardware components, the one or more other hardware components including but not limited to input / output (I / O) components, transceivers, network servers, another computing device, one or more other components described in this disclosure, or combinations thereof.

[0173] The transmitter 620 may transmit signals generated by other components of the device 605. In some examples, the transmitter 620 may be co-located with the receiver 610 in a transceiver module. For example, the transmitter 620 may be an example of aspects of the transceiver 920 described with reference to Figure 9 The transmitter 620 may utilize a single antenna or an antenna array.

[0174] In some examples, the UE communication manager 615 may be implemented as an integrated circuit or chipset for a mobile device modem, and the receiver 610 and the transmitter 620 may be implemented as analog components (e.g., amplifiers, filters, antennas) coupled to the mobile device modem to enable wireless transmission and reception on one or more frequency bands.

[0175] As described herein, the UE communication manager 615 may be implemented to achieve one or more improvements. One implementation may allow the device 605 to determine beam correlation parameters to perform inter-band carrier aggregation across two or more frequency bands. The beam correlation parameters may improve reliability and reduce latency during communication.

[0176] Based on the techniques for signaling beam correlation across millimeter wave frequency bands described herein, a processor of the UE 115 (e.g., the control receiver 610, the transmitter 620, or the transceiver 920 as described with reference to Figure 9 can increase reliability and reduce signaling overhead in communication because the UE 115 can perform inter-band carrier aggregation across two or more frequency bands.

[0177] Figure 7 FIG. 700 is a block diagram of a device 705 supporting signaling of beam correlation across millimeter wave frequency bands in accordance with aspects of the present disclosure. The device 705 may be an example of aspects of the device 605 or the UE 115 described herein. The device 705 may include a receiver 710, a communication manager 715, and a transmitter 740. The device 705 may also include a processor. Each of these components may be in communication with each other (e.g., via one or more buses).

[0178] The receiver 710 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 signaling of beam correlation across millimeter wave frequency bands, etc.). The information may be passed to other components of the device 705. The receiver 710 may be an example of aspects of the transceiver 920 described with reference to Figure 9 The receiver 710 may utilize a single antenna or an antenna array.

[0179] The communication manager 715 may be an example of aspects of the communication manager 615 described herein. The communication manager 715 may include a carrier aggregation configuration receiver 720, a beam correlation determination component 725, a beam determination component 730, and a carrier aggregation mode communication component 735. The communication manager 715 may be an example of aspects of the communication manager 910 described herein.

[0180] The carrier aggregation configuration receiver 720 may receive, from a second wireless device, a carrier aggregation configuration for communicating with the second wireless device, the carrier aggregation configuration including at least a first frequency band and a second frequency band.

[0181] The beam correlation determination component 725 may determine beam correlation parameters based on the carrier aggregation configuration received from the second wireless device.

[0182] The beam determination component 730 may determine a first beam for use in communication with a second wireless device on a first frequency band based on beam correlation parameters, and determine a second beam for use in communication with the second wireless device on a second frequency band based on the beam correlation parameters.

[0183] The carrier aggregation mode communication component 735 may communicate with the second wireless device in an inter-band carrier aggregation mode using the first beam on a first millimeter wave frequency band and the second beam on a second millimeter wave frequency band.

[0184] The transmitter 740 may transmit signals generated by other components of the device 705. In some examples, the transmitter 740 may be co-located with the receiver 710 in a transceiver module. For example, the transmitter 740 may be an example of aspects of the transceiver 920 described with reference to Figure 9 The transmitter 740 may utilize a single antenna or an antenna array.

[0185] In some examples, the UE communication manager 715 may be implemented as an integrated circuit or chipset for a mobile device modem, and the receiver 710 and the transmitter 740 may be implemented as analog components (e.g., amplifiers, filters, antennas) coupled to the mobile device modem to enable wireless transmission and reception on one or more frequency bands.

[0186] The UE communication manager 715 as described herein may be implemented to achieve one or more improvements. One implementation may allow the device 705 to determine beam correlation parameters to perform inter-band carrier aggregation across two or more frequency bands. The beam correlation parameters may improve reliability and reduce latency during communication.

[0187] Based on the techniques for signaling beam correlation across millimeter wave frequency bands described herein, a processor of the UE 115 (e.g., controlling the receiver 710, the transmitter 740, or the transceiver 920 as described with reference to Figure 9 may increase reliability and reduce signaling overhead in communication because the UE 115 may perform inter-band carrier aggregation across two or more frequency bands.

[0188] Figure 8Block diagram 800 of a communication manager 805 that supports signaling for beam correlation across millimeter wave frequency bands, in accordance with aspects of the present disclosure. The communication manager 805 may be an example of aspects of the communication manager 615, the communication manager 715, or the communication manager 910 described herein. The communication manager 805 may include a carrier aggregation configuration receiver 810, a beam correlation determination component 815, a beam determination component 820, a carrier aggregation mode communication component 825, a broadcast message receiver 830, and a millimeter wave frequency band component 835. Each of these modules may communicate directly or indirectly with each other (e.g., via one or more buses).

[0189] The carrier aggregation configuration receiver 810 may receive, from a second wireless device, a carrier aggregation configuration for communicating with the second wireless device, the carrier aggregation configuration including at least a first frequency band and a second frequency band.

[0190] In some examples, the carrier aggregation configuration receiver 810 may receive, from the second wireless device, a configuration message specific to bandwidth parts of the first frequency band and the second frequency band.

[0191] In some examples, the carrier aggregation configuration receiver 810 may receive, from the second wireless device, a configuration message specific to a transmission configuration indication state used by the second wireless device in the first and second millimeter wave frequency bands.

[0192] In some examples, the carrier aggregation configuration receiver 810 may receive, from the second wireless device, a configuration message that is a weighted average metric of two or more transmission configuration indication states used by the second wireless device in the first and second millimeter wave frequency bands.

[0193] In some examples, the carrier aggregation configuration receiver 810 may determine a weight for use with the weighted average metric and a transmission configuration indication of a second beam used in determining the weighted average.

[0194] The beam correlation determination component 815 may determine beam correlation parameters based on the carrier aggregation configuration received from the second wireless device.

[0195] The beam determination component 820 may determine a first beam for use in communicating with the second wireless device on the first frequency band based on the beam correlation parameters.

[0196] In some examples, the beam determination component 820 may determine a second beam for use in communicating with the second wireless device on the second frequency band based on the beam correlation parameters.

[0197] The carrier aggregation mode communication component 825 may communicate with the second wireless device in an inter-band carrier aggregation mode using the first beam on the first millimeter wave frequency band and the second beam on the second millimeter wave frequency band.

[0198] The broadcast message receiver 830 may receive a configuration message from a second wireless device, the configuration message being a broadcast message destined for one or more wireless devices including at least the first wireless device, a wireless device-specific message for the first wireless device, or both.

[0199] The millimeter wave band component 835 may receive a configuration message from a second wireless device, the configuration message being specific to the transmission configuration indication status used by the second wireless device in the first and second frequency bands.

[0200] In some cases, the first millimeter wave band is a lower millimeter wave band and the second millimeter wave band is a higher millimeter wave band. In some cases, the first frequency band includes frequencies between 24.25 GHz and 52.6 GHz, and the second frequency band includes frequencies greater than 52.6 GHz.

[0201] In some cases, the first wireless device is a UE or CPE in a wireless communication system, and the second wireless device is a base station, CPE, relay device, router, repeater, or IAB node in the wireless communication system.

[0202] Figure 9 A diagram of a system 900 including a device 905 supporting signaling for beam correlation across millimeter wave frequency bands in accordance with aspects of the present disclosure is shown. The device 905 may be an example of, or include components of, the device 605, the device 705, or the UE 115 as described herein. The device 905 may include components for two-way voice and data communication, which include components for transmitting and receiving communications, including a communication manager 910, an I / O controller 915, a transceiver 920, an antenna 925, a memory 930, and a processor 940. These components may be in electronic communication via one or more buses (e.g., bus 945).

[0203] The communication manager 910 may: receive a carrier aggregation configuration for communicating with a second wireless device from the second wireless device, the carrier aggregation configuration including at least a first frequency band and a second frequency band; determine beam correlation parameters based on the carrier aggregation configuration received from the second wireless device; determine a first beam for use in communicating with the second wireless device on the first frequency band based on the beam correlation parameters; determine a second beam for use in communicating with the second wireless device on the second frequency band based on the beam correlation parameters; and communicate with the second wireless device in an inter-band carrier aggregation mode using the first beam on the first millimeter wave frequency band and the second beam on the second millimeter wave frequency band.

[0204] The I / O controller 915 may manage the input and output signals of the device 905. The I / O controller 915 may also manage peripheral devices not integrated into the device 905. In some cases, the I / O controller 915 may represent a physical connection or port to an external peripheral device. In some cases, the I / O controller 915 may utilize an operating system such as MS- MS- OS / or another known operating system. In other cases, the I / O controller 915 may represent or interact with a modem, keyboard, mouse, touch screen, or similar device. In some cases, the I / O controller 915 may be implemented as part of a processor. In some cases, a user may interact with the device 905 via the I / O controller 915 or via hardware components controlled by the I / O controller 915.

[0205] The transceiver 920 may perform two-way communication via one or more antennas, wired or wireless links, as described above. For example, the transceiver 920 may represent a wireless transceiver and may perform two-way communication with another wireless transceiver. The transceiver 920 may also include a modem to modulate packets and provide the modulated packets to the antenna for transmission, and to demodulate packets received from the antenna.

[0206] In some cases, a wireless device may include a single antenna 925. However, in some cases, the device may have more than one antenna 925, which may be capable of concurrently transmitting or receiving multiple wireless transmissions.

[0207] The memory 930 may include random access memory (RAM) and read-only memory (ROM). The memory 930 may store computer-readable, computer-executable code 935 including instructions that, when executed, cause the processor to perform the various functions described herein. In some cases, the memory 930 may particularly contain the BIOS, which may control basic hardware or software operations, such as interaction with peripheral components or devices.

[0208] Processor 940 may include intelligent hardware devices (e.g., a general-purpose processor, DSP, CPU, microcontroller, ASIC, FPGA, programmable logic device, discrete gate or transistor logic components, discrete hardware components, or any combination thereof). In some cases, processor 940 may be configured to operate a memory array using a memory controller. In other cases, the memory controller may be integrated into processor 940. Processor 940 may be configured to execute computer-readable instructions stored in a memory (e.g., memory 930) to cause device 905 to perform various functions (e.g., functions or tasks supporting signaling for beam correlation across millimeter-wave frequency bands).

[0209] Code 935 may include instructions for implementing aspects of the present disclosure, including instructions for supporting wireless communication. Code 935 may be stored in a non-transitory computer-readable medium, such as system memory or other types of memory. In some cases, code 935 may not be directly executable by processor 940 but may cause a computer (e.g., when compiled and executed) to perform the functions described herein.

[0210] Figure 10 Block diagram 1000 of a device 1005 supporting signaling for beam correlation across millimeter-wave frequency bands in accordance with aspects of the present disclosure is shown. Device 1005 may be an example of aspects of base station 105 as described herein. Device 1005 may include a receiver 1010, a communication manager 1015, and a transmitter 1020. Device 1005 may also include a processor. Each of these components may be in communication with one another (e.g., via one or more buses).

[0211] Receiver 1010 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 signaling for beam correlation across millimeter-wave frequency bands, etc.). The information may be passed to other components of device 1005. Receiver 1010 may be an example of aspects of transceiver 1320 described with reference to Figure 13 Receiver 1010 may utilize a single antenna or an antenna array.

[0212] Communication manager 1015 may: transmit to a first wireless device a carrier aggregation configuration for communicating with the first wireless device, the carrier aggregation configuration including at least a first frequency band and a second frequency band; determine beam correlation parameters based on the carrier aggregation configuration; and communicate with the first wireless device in an inter-band carrier aggregation mode using a first beam on a first millimeter-wave frequency band and a different second beam on a second millimeter-wave frequency band, the first beam and the second beam being based on the beam correlation parameters. Communication manager 1015 may be an example of aspects of communication manager 1310 described herein.

[0213] The communication manager 1015 or its sub-components may be implemented in hardware, code executed by a processor (e.g., software or firmware), or any combination thereof. If implemented in code executed by a processor, the functions of the communication manager 1015 or its sub-components may be performed by a general-purpose processor, DSP, ASIC, 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 this disclosure.

[0214] The communication manager 1015 or its sub-components may be physically located at various positions, including being distributed such that portions of the functions are implemented by one or more physical components at different physical locations. In some examples, according to various aspects of this disclosure, the communication manager 1015 or its sub-components may be separate and distinct components. In some examples, according to various aspects of this disclosure, the communication manager 1015 or its sub-components may be combined with one or more other hardware components, including but not limited to input / output (I / O) components, transceivers, network servers, another computing device, one or more other components described in this disclosure, or a combination thereof.

[0215] The transmitter 1020 may transmit signals generated by other components of the device 1005. In some examples, the transmitter 1020 may be co-located with the receiver 1010 in a transceiver module. For example, the transmitter 1020 may be an example of aspects of the transceiver 1320 described with reference to Figure 13 The transmitter 1020 may utilize a single antenna or an antenna array.

[0216] Figure 11 Block diagram 1100 of a device 1105 supporting signaling for beam correlation across millimeter-wave frequency bands in accordance with aspects of this disclosure is shown. The device 1105 may be an example of aspects of the device 1005 or the base station 105 described herein. The device 1105 may include a receiver 1110, a communication manager 1115, and a transmitter 1135. The device 1105 may also include a processor. Each of these components may be in communication with each other (e.g., via one or more buses).

[0217] The receiver 1110 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 signaling for beam correlation across millimeter-wave frequency bands, etc.). The information may be passed to other components of the device 1105. The receiver 1110 may be an example of aspects of the transceiver 1320 described with reference to Figure 13 The receiver 1110 may utilize a single antenna or an antenna array.

[0218] Communication manager 1115 may be an example of aspects of communication manager 1015 as described herein. Communication manager 1115 may include a carrier aggregation configuration transmitter 1120, a beam correlation determination manager 1125, and a carrier aggregation mode manager 1130. Communication manager 1115 may be an example of aspects of communication manager 1310 described herein.

[0219] The carrier aggregation configuration transmitter 1120 may transmit a carrier aggregation configuration for communicating with a first wireless device to the first wireless device, the carrier aggregation configuration including at least a first frequency band and a second frequency band.

[0220] The beam correlation determination manager 1125 may determine beam correlation parameters based on the carrier aggregation configuration.

[0221] The carrier aggregation mode manager 1130 may communicate with the first wireless device in an inter-band carrier aggregation mode using a first beam on a first millimeter wave frequency band and a second beam on a second millimeter wave frequency band, the first beam and the second beam being based on the beam correlation parameters.

[0222] The transmitter 1135 may transmit signals generated by other components of the device 1105. In some examples, the transmitter 1135 may be co-located with the receiver 1110 in a transceiver module. For example, the transmitter 1135 may be an example of aspects of the transceiver 1320 described with reference to Figure 13 The transmitter 1135 may utilize a single antenna or an antenna array.

[0223] Figure 12 Block diagram 1200 of a communication manager 1205 supporting signaling of beam correlation across millimeter wave frequency bands in accordance with aspects of the present disclosure is shown. Communication manager 1205 may be an example of aspects of communication manager 1015, communication manager 1115, or communication manager 1310 described herein. Communication manager 1205 may include a carrier aggregation configuration transmitter 1210, a beam correlation determination manager 1215, a carrier aggregation mode manager 1220, a broadcast message transmitter 1225, and a millimeter wave frequency band manager 1230. Each of these modules may communicate directly or indirectly with each other (e.g., via one or more buses).

[0224] The carrier aggregation configuration transmitter 1210 may transmit a carrier aggregation configuration for communicating with a first wireless device to the first wireless device, the carrier aggregation configuration including at least a first frequency band and a second frequency band.

[0225] In some examples, the carrier aggregation configuration transmitter 1210 may transmit a configuration message specific to the bandwidth parts of the first frequency band and the second frequency band to the first wireless device.

[0226] In some examples, a carrier aggregation configuration transmitter 1210 may transmit a configuration message to a first wireless device that is specific to a transmission configuration indication state used by a second wireless device in first and second millimeter wave frequency bands.

[0227] In some examples, a carrier aggregation configuration transmitter 1210 may transmit a configuration message to a first wireless device that is a weighted average metric of two or more transmission configuration indication states used by a second wireless device in first and second millimeter wave frequency bands.

[0228] A beam correlation determination manager 1215 may determine beam correlation parameters based on a carrier aggregation configuration.

[0229] A carrier aggregation mode manager 1220 may communicate with a first wireless device in an inter-band carrier aggregation mode using a first beam on a first millimeter wave frequency band and a second beam on a second millimeter wave frequency band, where the first beam and the second beam are based on the beam correlation parameters.

[0230] A broadcast message transmitter 1225 may transmit a configuration message to a first wireless device that is a broadcast message to one or more wireless devices including at least the first wireless device, a wireless device specific message for the first wireless device, or both.

[0231] A millimeter wave frequency band manager 1230 may receive a configuration message from a second wireless device that is specific to a transmission configuration indication state used by the second wireless device in first and second frequency bands.

[0232] In some cases, the first millimeter wave frequency band is a lower millimeter wave frequency band and the second millimeter wave frequency band is a higher millimeter wave frequency band.

[0233] In some cases, the first wireless device is a UE or a CPE in a wireless communication 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 communication system.

[0234] In some cases, the first frequency band includes frequencies between 24.25 GHz and 52.6 GHz, and the second frequency band includes frequencies greater than 52.6 GHz.

[0235] Figure 13FIG. 1300 shows a system 1300 including a device 1305 supporting signaling for beam correlation across millimeter wave frequency bands, in accordance with aspects of the present disclosure. The device 1305 may be an example of, or include components of, the device 1005, the device 1105, or the base station 105 as described herein. The device 1305 may include components for two-way voice and data communication, including components for transmitting and receiving communications, including a communication manager 1310, a network communication manager 1315, a transceiver 1320, an antenna 1325, a memory 1330, a processor 1340, and an inter-station communication manager 1345. These components may be in electronic communication via one or more buses (e.g., bus 1350).

[0236] The communication manager 1310 may: transmit to a first wireless device a carrier aggregation configuration for communicating with the first wireless device, the carrier aggregation configuration including at least a first frequency band and a second frequency band; determine beam correlation parameters based on the carrier aggregation configuration; and communicate with the first wireless device in an inter-band carrier aggregation mode using a first beam on a first millimeter wave frequency band and a second beam on a second millimeter wave frequency band, the first beam and the second beam being based on the beam correlation parameters.

[0237] The network communication manager 1315 may manage communication with a core network (e.g., via one or more wired backhaul links). For example, the network communication manager 1315 may manage the delivery of data communication for client devices (such as one or more UEs 115).

[0238] The transceiver 1320 may communicate bi-directionally via one or more antennas, wired or wireless links, as described above. For example, the transceiver 1320 may represent a wireless transceiver and may communicate bi-directionally with another wireless transceiver. The transceiver 1320 may also include a modem to modulate packets and provide the modulated packets to the antenna for transmission, and to demodulate packets received from the antenna.

[0239] In some instances, the wireless device may include a single antenna 1325. However, in some instances, the device may have more than one antenna 1325, which may be capable of concurrently transmitting or receiving multiple wireless transmissions.

[0240] The memory 1330 may include RAM, ROM, or a combination thereof. The memory 1330 may store computer-readable code 1335 including instructions that, when executed by a processor (e.g., processor 1340), cause the device to perform the various functions described herein. In some instances, the memory 1330 may particularly include a BIOS, which may control basic hardware or software operations, such as interaction with peripheral components or devices.

[0241] Processor 1340 may include intelligent hardware devices (e.g., general-purpose processors, DSPs, CPUs, microcontrollers, ASICs, FPGAs, programmable logic devices, discrete gate or transistor logic components, discrete hardware components, or any combination thereof). In some cases, processor 1340 may be configured to operate a memory array using a memory controller. In some cases, the memory controller may be integrated into processor 1340. Processor 1340 may be configured to execute computer-readable instructions stored in a memory (e.g., memory 1330) to cause device 1305 to perform various functions (e.g., functions or tasks supporting signaling for beam correlation across millimeter wave frequency bands).

[0242] The inter-station communication manager 1345 may manage communication with other base stations 105 and may include a controller or scheduler for collaboratively controlling communication with the UE 115 with other base stations 105. For example, the inter-station communication manager 1345 may coordinate the scheduling of transmissions to the UE 115 for various interference mitigation techniques such as beamforming or joint transmission. In some examples, the inter-station communication manager 1345 may provide an X2 interface within LTE / LTE-A radio communication network technologies to provide communication between base stations 105.

[0243] Code 1335 may include instructions for implementing aspects of the present disclosure, including instructions for supporting wireless communication. Code 1335 may be stored in a non-transitory computer-readable medium, such as system memory or other types of memory. In some cases, code 1335 may not be directly executable by processor 1340, but may cause a computer (e.g., when compiled and executed) to perform the functions described herein.

[0244] Figure 14 A flowchart illustrating a method 1400 for supporting signaling for beam correlation across millimeter wave frequency bands in accordance with aspects of the present disclosure is shown. Operations of method 1400 may be implemented by the UE 115 or its components as described herein. For example, operations of method 1400 may be performed by a communication manager as described with reference to Figures 6 to 9 Additional or alternatively, the UE may use dedicated hardware to perform aspects of the following functions.

[0245] At 1405, the UE may receive a carrier aggregation configuration for communicating with a second wireless device from the second wireless device, the carrier aggregation configuration including at least a first frequency band and a second frequency band. The operation of 1405 may be performed in accordance with the methods described herein. In some examples, aspects of the operation of 1405 may be performed by a carrier aggregation configuration receiver as described with reference to Figures 6 to 9 ​

[0246] At 1410, the UE may communicate with a second wireless device in carrier aggregation using a first beam on a first frequency band and a second beam on a second frequency band, where the first beam and the second beam are at least partially based on a beam correlation parameter that is at least partially based on the received carrier aggregation configuration. The operations at 1410 may be performed in accordance with the methods described herein. In some examples, aspects of the operations at 1410 may be performed by a beam correlation determination component as described with reference to Figures 6 to 9 what is described.

[0247] Figure 15 FIG. 1500 is a flow diagram illustrating a method for signaling beam correlation supporting cross-millimeter wave frequency bands in accordance with aspects of the present disclosure. The operations of method 1500 may be implemented by a UE 115 or components thereof as described herein. For example, the operations of method 1500 may be performed by a communication manager as described with reference to Figures 6 to 9 what is described. In some examples, the UE may execute an instruction set to control functional elements of the UE to perform the following functions. Additionally or alternatively, the UE may use dedicated hardware to perform aspects of the following functions.

[0248] At 1505, the UE may receive a carrier aggregation configuration for communicating with the second wireless device from the second wireless device, the carrier aggregation configuration including at least a first frequency band and a second frequency band. The operations at 1505 may be performed in accordance with the methods described herein. In some examples, aspects of the operations at 1505 may be performed by a carrier aggregation configuration receiver as described with reference to Figures 6 to 9 what is described.

[0249] At 1510, the UE may receive a configuration message from the second wireless device, the configuration message being a broadcast message to one or more wireless devices including at least the first wireless device, a wireless device specific message for the first wireless device, or both. The operations at 1510 may be performed in accordance with the methods described herein. In some examples, aspects of the operations at 1510 may be performed by a broadcast message receiver as described with reference to Figures 6 to 9 what is described.

[0250] At 1515, the UE may communicate with the second wireless device in carrier aggregation using a first beam on a first frequency band and a second beam on a second frequency band, where the first beam and the second beam are at least partially based on a beam correlation parameter that is at least partially based on the received carrier aggregation configuration. The operations at 1515 may be performed in accordance with the methods described herein. In some examples, aspects of the operations at 1515 may be performed by a beam correlation determination component as described with reference to Figures 6 to 9 what is described.

[0251] Figure 16 FIG. 1600 is a flow chart illustrating a method 1600 for signaling beam correlation across millimeter wave frequency bands in accordance with aspects of the present disclosure. Operations of method 1600 may be implemented by UE 115 or components thereof as described herein. For example, operations of method 1600 may be performed by a communication manager as described with reference to Figures 6 to 9 FIG. [REFERENCE]. In some examples, the UE may execute an instruction set to control functional elements of the UE to perform the functions described below. Additionally or alternatively, the UE may use special purpose hardware to perform aspects of the functions described below.

[0252] At 1605, the UE may receive a carrier aggregation configuration for communicating with a second wireless device from the second wireless device, the carrier aggregation configuration including at least a first frequency band and a second frequency band. The operation at 1605 may be performed according to methods described herein. In some examples, aspects of the operation at 1605 may be performed by a carrier aggregation configuration receiver as described with reference to Figures 6 to 9 FIG. [REFERENCE].

[0253] At 1610, the UE may receive a configuration message specific to a bandwidth part of the first frequency band and the second frequency band from the second wireless device. The operation at 1610 may be performed according to methods described herein. In some examples, aspects of the operation at 1610 may be performed by a carrier aggregation configuration receiver as described with reference to Figures 6 to 9 FIG. [REFERENCE].

[0254] At 1615, the UE may communicate with the second wireless device in a carrier aggregation using a first beam on the first frequency band and a second beam on the second frequency band, the first beam and the second beam being at least partially based on a beam correlation parameter that is at least partially based on the received carrier aggregation configuration. The operation at 1615 may be performed according to methods described herein. In some examples, aspects of the operation at 1615 may be performed by a beam correlation determination component as described with reference to Figures 6 to 9 FIG. [REFERENCE].

[0255] Figure 17 FIG. 1700 is a flow chart illustrating a method 1700 for signaling beam correlation across millimeter wave frequency bands in accordance with aspects of the present disclosure. Operations of method 1700 may be implemented by UE 115 or components thereof as described herein. For example, operations of method 1700 may be performed by a communication manager as described with reference to Figures 6 to 9 FIG. [REFERENCE]. In some examples, the UE may execute an instruction set to control functional elements of the UE to perform the functions described below. Additionally or alternatively, the UE may use special purpose hardware to perform aspects of the functions described below.

[0256] In 1705, the UE may receive, from a second wireless device, a carrier aggregation configuration for communicating with the second wireless device, the carrier aggregation configuration including at least a first band and a second band. Operations of 1705 may be performed according to the methods described herein. In some examples, aspects of the operations of 1705 may be performed by a carrier aggregation configuration receiver as described with reference to Figures 6 to 9 as described.

[0257] In 1710, the UE may receive, from the second wireless device, a configuration message specific to a transmission configuration indication state used by the second wireless device in first and second millimeter wave bands. Operations of 1710 may be performed according to the methods described herein. In some examples, aspects of the operations of 1710 may be performed by a carrier aggregation configuration receiver as described with reference to Figures 6 to 9 as described.

[0258] In 1715, the UE may communicate with the second wireless device in a carrier aggregation using a first beam on a first band and a second beam on a second band, the first beam and the second beam being at least partially based on a beam correlation parameter that is at least partially based on the received carrier aggregation configuration. Operations of 1715 may be performed according to the methods described herein. In some examples, aspects of the operations of 1715 may be performed by a beam correlation determination component as described with reference to Figures 6 to 9 as described.

[0259] Figure 18 A flowchart of a method 1800 illustrating signaling supporting cross-band beam correlation in accordance with aspects of the present disclosure is shown. Operations of method 1800 may be implemented by a base station 105 or components thereof as described herein. For example, operations of method 1800 may be performed by a communication manager as described with reference to Figures 10 to 13 as described. In some examples, the base station may execute an instruction set to control functional elements of the base station to perform the following functions. Additionally or alternatively, the base station may use dedicated hardware to perform aspects of the following functions.

[0260] In 1805, the base station may transmit, to a first wireless device, a carrier aggregation configuration for communicating with the first wireless device, the carrier aggregation configuration including at least a first band and a second band. Operations of 1805 may be performed according to the methods described herein. In some examples, aspects of the operations of 1805 may be performed by a carrier aggregation configuration transmitter as described with reference to Figures 10 to 13 as described.

[0261] In 1810, a base station may communicate with a first wireless device in carrier aggregation using a first beam on a first frequency band and a second beam on a second millimeter wave frequency band. The first beam and the second beam are at least partially based on beam correlation parameters that are at least partially based on a received carrier aggregation configuration. The operations of 1810 may be performed in accordance with the methods described herein. In some examples, aspects of the operations of 1810 may be performed by a beam correlation determination manager as described with reference to Figures 10 to 13 as described.

[0262] Figure 19 FIG. 1900 is a flow diagram illustrating a method 1900 for signaling beam correlation across millimeter wave frequency bands in support of aspects of the present disclosure. The operations of method 1900 may be implemented by a UE 115 or components thereof as described herein. For example, the operations of method 1900 may be performed by a communication manager as described with reference to Figures 6 to 9 as described. In some examples, the UE may execute an instruction set to control functional elements of the UE to perform the following functions. Additionally or alternatively, the UE may use dedicated hardware to perform aspects of the following functions.

[0263] In 1905, the UE may receive an inter-band carrier aggregation configuration for communicating with a second wireless device from the second wireless device. The inter-band carrier aggregation configuration includes at least a first millimeter wave frequency band and a second millimeter wave frequency band. The operations of 1905 may be performed in accordance with the methods described herein. In some examples, aspects of the operations of 1905 may be performed by an inter-band carrier aggregation configuration receiver as described with reference to Figures 6 to 9 as described.

[0264] In 1910, the UE may determine beam correlation parameters based on the inter-band carrier aggregation configuration received from the second wireless device. The operations of 1910 may be performed in accordance with the methods described herein. In some examples, aspects of the operations of 1910 may be performed by a beam correlation determination component as described with reference to Figures 6 to 9 as described.

[0265] In 1915, the UE may determine a first beam for use in communicating with the second wireless device on the first millimeter wave frequency band based on the beam correlation parameters. The operations of 1915 may be performed in accordance with the methods described herein. In some examples, aspects of the operations of 1915 may be performed by a beam determination component as described with reference to Figures 6 to 9 as described.

[0266] In 1920, the UE may determine a second beam for use in communicating with the second wireless device on the second millimeter wave frequency band based on the beam correlation parameters. The operations of 1920 may be performed in accordance with the methods described herein. In some examples, aspects of the operations of 1920 may be performed by a beam determination component as described with reference toFigures 6 to 9 performed by the described beam determination component.

[0267] In 1925, the UE may communicate with a second wireless device in an inter-band carrier aggregation mode using a first beam on a first millimeter wave band and a second beam on a second millimeter wave band. The operation of 1925 may be performed according to the methods described herein. In some examples, aspects of the operation of 1925 may be performed by a carrier aggregation mode communication component as described with reference to Figures 6 to 9 the described carrier aggregation mode communication component.

[0268] Figure 20 A flowchart of a method 2000 illustrating signaling supporting beam correlation across millimeter wave bands in accordance with aspects of the present disclosure is shown. The operations of method 2000 may be implemented by a UE 120 or its components as described herein. For example, the operations of method 2000 may be performed by a communication manager as described with reference to Figures 6 to 9 the described communication manager. In some examples, the UE may execute an instruction set to control functional elements of the UE to perform the following functions. Additionally or alternatively, the UE may use dedicated hardware to perform aspects of the following functions.

[0269] In 2005, the UE may receive an inter-band carrier aggregation configuration for communicating with the second wireless device from the second wireless device, the inter-band carrier aggregation configuration including at least a first millimeter wave band and a second millimeter wave band. The operation of 2005 may be performed according to the methods described herein. In some examples, aspects of the operation of 2005 may be performed by a carrier aggregation configuration receiver as described with reference to Figures 6 to 9 the described carrier aggregation configuration receiver.

[0270] In 2010, the UE may receive a configuration message from the second wireless device, the configuration message being a broadcast message to one or more wireless devices including at least a first wireless device, a wireless device specific message for the first wireless device, or both. The operation of 2010 may be performed according to the methods described herein. In some examples, aspects of the operation of 2010 may be performed by a broadcast message receiver as described with reference to Figures 6 to 9 the described broadcast message receiver.

[0271] In 2020, the UE may determine beam correlation parameters based on the inter-band carrier aggregation configuration received from the second wireless device. The operation of 2020 may be performed according to the methods described herein. In some examples, aspects of the operation of 2020 may be performed by a beam correlation determination component as described with reference to Figures 6 to 9 the described beam correlation determination component.

[0272] In 2020, the UE may determine a first beam for use in communication with a second wireless device on a first millimeter wave band based on beam correlation parameters. The operations of 2020 may be performed according to the methods described herein. In some examples, aspects of the operations of 2020 may be performed by a beam determination component as described with reference to Figures 6 to 9 as described.

[0273] In 2025, the UE may determine a second beam for use in communication with a second wireless device on a second millimeter wave band based on beam correlation parameters. The operations of 2025 may be performed according to the methods described herein. In some examples, aspects of the operations of 2025 may be performed by a beam determination component as described with reference to Figures 6 to 9 as described.

[0274] In 2030, the UE may communicate with the second wireless device in an inter-band carrier aggregation mode using the first beam on the first millimeter wave band and the second beam on the second millimeter wave band. The operations of 2030 may be performed according to the methods described herein. In some examples, aspects of the operations of 2030 may be performed by a carrier aggregation mode communication component as described with reference to Figures 6 to 9 as described.

[0275] Figure 21 A flowchart of a method 2100 is shown that illustrates signaling supporting beam correlation across millimeter wave bands in accordance with aspects of the present disclosure. The operations of method 2100 may be implemented by a UE 115 or its components as described herein. For example, the operations of method 2100 may be performed by a communication manager as described with reference to Figures 6 to 9 as described. In some examples, the UE may execute an instruction set to control functional elements of the UE to perform the following functions. Additionally or alternatively, the UE may use dedicated hardware to perform aspects of the following functions.

[0276] In 2105, the UE may receive an inter-band carrier aggregation configuration for communication with the second wireless device from the second wireless device, the inter-band carrier aggregation configuration including at least a first millimeter wave band and a second millimeter wave band. The operations of 2105 may be performed according to the methods described herein. In some examples, aspects of the operations of 2105 may be performed by a carrier aggregation configuration receiver as described with reference to Figures 6 to 9 as described.

[0277] In 2110, the UE may receive a configuration message specific to bandwidth portions of the first and second millimeter wave bands from the second wireless device. The operations of 2110 may be performed according to the methods described herein. In some examples, aspects of the operations of 2110 may be performed by a carrier aggregation configuration receiver as described with reference to Figures 6 to 9 as described.

[0278] At 2115, the UE may determine beam correlation parameters based on an inter-band carrier aggregation configuration received from a second wireless device. Operations at 2115 may be performed according to the methods described herein. In some examples, aspects of the operations at 2115 may be performed by a beam correlation determination component as described with reference to Figures 6 to 9 as described.

[0279] At 2120, the UE may determine a first beam for use in communication with the second wireless device on a first millimeter wave band based on the beam correlation parameters. Operations at 2120 may be performed according to the methods described herein. In some examples, aspects of the operations at 2120 may be performed by a beam determination component as described with reference to Figures 6 to 9 as described.

[0280] At 2125, the UE may determine a second beam for use in communication with the second wireless device on a second millimeter wave band based on the beam correlation parameters. Operations at 2125 may be performed according to the methods described herein. In some examples, aspects of the operations at 2125 may be performed by a beam determination component as described with reference to Figures 6 to 9 as described.

[0281] At 2130, the UE may communicate with the second wireless device in an inter-band carrier aggregation mode using the first beam on the first millimeter wave band and the second beam on the second millimeter wave band. Operations at 2130 may be performed according to the methods described herein. In some examples, aspects of the operations at 2130 may be performed by a carrier aggregation mode communication component as described with reference to Figures 6 to 9 as described.

[0282] Figure 22 A flowchart of a method 2200 illustrating signaling supporting beam correlation across millimeter wave bands in accordance with aspects of the present disclosure is shown. Operations of method 2200 may be implemented by a UE 115 or components thereof as described herein. For example, operations of method 2200 may be performed by a communication manager as described with reference to Figures 6 to 9 as described. In some examples, the UE may execute an instruction set to control functional elements of the UE to perform the following functions. Additionally or alternatively, the UE may use dedicated hardware to perform aspects of the following functions.

[0283] At 2205, the UE may receive an inter-band carrier aggregation configuration for communication with the second wireless device from the second wireless device, the inter-band carrier aggregation configuration including at least a first millimeter wave band and a second millimeter wave band. Operations at 2205 may be performed according to the methods described herein. In some examples, aspects of the operations at 2205 may be performed by a carrier aggregation configuration receiver as described with reference to Figures 6 to 9 as described.

[0284] At 2210, the UE may receive a configuration message from a second wireless device, the configuration message being specific to a transmission configuration indication state used by the second wireless device in first and second millimeter wave frequency bands. The operations at 2210 may be performed in accordance with the methods described herein. In some examples, aspects of the operations at 2210 may be performed by a carrier aggregation configuration receiver as described with reference to Figures 6 to 9 as described.

[0285] At 2215, the UE may determine beam correlation parameters based on an inter-band carrier aggregation configuration received from the second wireless device. The operations at 2215 may be performed in accordance with the methods described herein. In some examples, aspects of the operations at 2215 may be performed by a beam correlation determination component as described with reference to Figures 6 to 9 as described.

[0286] At 2220, the UE may determine a first beam for use in communication with the second wireless device on a first millimeter wave frequency band based on the beam correlation parameters. The operations at 2220 may be performed in accordance with the methods described herein. In some examples, aspects of the operations at 2220 may be performed by a beam determination component as described with reference to Figures 6 to 9 as described.

[0287] At 2225, the UE may determine a second beam for use in communication with the second wireless device on a second millimeter wave frequency band based on the beam correlation parameters. The operations at 2225 may be performed in accordance with the methods described herein. In some examples, aspects of the operations at 2225 may be performed by a beam determination component as described with reference to Figures 6 to 9 as described.

[0288] At 2230, the UE may communicate with the second wireless device in an inter-band carrier aggregation mode using the first beam on the first millimeter wave frequency band and the second beam on the second millimeter wave frequency band. The operations at 2230 may be performed in accordance with the methods described herein. In some examples, aspects of the operations at 2230 may be performed by a carrier aggregation mode communication component as described with reference to Figures 6 to 9 as described.

[0289] Figure 23 A flowchart of a method 2300 is shown that illustrates signaling supporting beam correlation across millimeter wave frequency bands in accordance with aspects of the present disclosure. The operations of method 2300 may be implemented by a base station 105 or components thereof as described herein. For example, the operations of method 2300 may be performed by a communication manager as described with reference to Figures 10 to 13 as described. In some examples, the base station may execute an instruction set to control functional elements of the base station to perform the following functions. Additionally or alternatively, the base station may use dedicated hardware to perform aspects of the following functions.

[0290] In 2305, the base station may transmit an inter-band carrier aggregation configuration for communicating with the first wireless device to the first wireless device, the inter-band carrier aggregation configuration including at least a first millimeter wave band and a second millimeter wave band. The operations of 2305 may be performed according to the methods described herein. In some examples, aspects of the operations of 2305 may be performed by a carrier aggregation configuration transmitter as described with reference to Figures 10 to 13 as described.

[0291] In 2310, the base station may determine beam correlation parameters based on the inter-band carrier aggregation configuration. The operations of 2310 may be performed according to the methods described herein. In some examples, aspects of the operations of 2310 may be performed by a beam correlation determination manager as described with reference to Figures 10 to 13 as described.

[0292] In 2315, the base station may communicate with the first wireless device in an inter-band carrier aggregation mode using a first beam on the first millimeter wave band and a second beam on the second millimeter wave band, the first beam and the second beam being based on the beam correlation parameters. The operations of 2315 may be performed according to the methods described herein. In some examples, aspects of the operations of 2315 may be performed by a carrier aggregation mode manager as described with reference to Figures 10 to 13 as described.

[0293] It should be noted that the methods described herein describe possible implementations, and the operations and steps may be rearranged or otherwise modified and other implementations are possible. In addition, aspects from two or more methods may be combined.

[0294] Although aspects of LTE, LTE-A, LTE-A Pro, or NR systems may be described for example purposes and LTE, LTE-A, LTE-A Pro, or NR terms may be used in most of the description, the techniques described herein may also be applied to networks other than LTE, LTE-A, LTE-A Pro, or NR networks. For example, the described techniques may be applied to various other wireless communication systems such as Ultra Mobile Broadband (UMB), Institute of Electrical and Electronics Engineers (IEEE) 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, Flash-OFDM, and other systems and radio technologies not explicitly mentioned herein.

[0295] The information and signals described herein may be represented using any of a variety of different arts and techniques. For example, data, instructions, commands, information, signals, bits, symbols, and chips that may be referred to throughout this description may be represented by voltage, current, electromagnetic waves, magnetic fields or magnetic particles, optical fields or optical particles, or any combination thereof.

[0296] The various illustrative blocks and components described in connection with the disclosure herein can be implemented or performed with a general purpose processor, a DSP, an ASIC, a CPU, 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 herein. A general purpose processor may be a microprocessor, but in the alternative, the processor may be any processor, controller, microcontroller, or state machine. The processor may 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).

[0297] 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 via a computer-readable medium as one or more instructions or code. Other examples and implementations fall within the scope of the disclosure and the appended claims. For example, due to the nature of software, the functions described herein can be implemented using software, hardware, firmware, hardwiring, or any combination thereof executed by a processor. The features implementing the functions can also be physically located in various places, including being distributed such that portions of the functions are implemented at different physical locations.

[0298] 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 may be any available medium that can be accessed by a general 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 disc (CD) ROM or other optical disc 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 or special purpose computer, or a general or special purpose processor. Similarly, any connection is properly termed a computer-readable medium. For example, if software is transmitted from a web site, 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. As used herein, disk and disc include CD, laser disc, optical disc, digital versatile disc (DVD), floppy disk, and Blu-ray disc, where disks usually reproduce data magnetically and discs reproduce data optically with lasers. Combinations of the above media are also included within the scope of computer-readable media.

[0299] As used herein, including in the claims, the "or" used in a list of items (e.g., a list of items accompanied by language such as "at least one of" or "one or more of") indicates an inclusive listing such that, for example, a listing 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" should not be construed as reciting a closed set of conditions. For example, an example step described as "based on condition A" can be based on both condition A and condition B without departing from the scope of the present disclosure. In other words, as used herein, the phrase "based on" should be interpreted in the same manner as the phrase "at least partially based on".

[0300] In the drawings, like components or features may have the same reference numerals. Additionally, each of the same type of components may be distinguished by following the reference numeral with a dash and a second label that differentiates between similar components. If only the first reference numeral is used in the specification, the description may apply to any one of the similar components having the same first reference numeral regardless of the second reference numeral, or any other subsequent reference numerals.

[0301] The description set forth herein with reference to the drawings describes example configurations and does not represent all examples that may be implemented or fall within the scope of the claims. The term "example" as used herein means "serving as an example, instance, or illustration" and does not mean "superior to" or "better than" other examples. This detailed description includes specific details to provide an understanding of the described technologies. However, the technologies may 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.

[0302] The description provided herein is to enable a person of ordinary skill in the art to make or use the present disclosure. Various modifications to the present disclosure will be apparent to a person of ordinary skill in the art, and the general principles defined herein may be applied to other variations without departing from the scope of the present disclosure. Thus, the present disclosure is not limited to the examples and designs described herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

[0303] An overview of various examples of the present disclosure is provided below: Aspect 1: A method for wireless communication at a first wireless device, including: receiving, from a second wireless device, a carrier aggregation configuration for communicating with the second wireless device, the carrier aggregation configuration including at least a first frequency band and a second frequency band; and communicating with the second wireless device in the carrier aggregation using a first beam on the first frequency band and a second beam on the second frequency band, the first beam and the second beam being at least partially based on a beam correlation parameter, the beam correlation parameter being at least partially based on the received carrier aggregation configuration.

[0304] Aspect 2: The method of Aspect 1, wherein receiving the carrier aggregation configuration further includes: receiving, from the second wireless device, an inter-band carrier aggregation configuration.

[0305] Aspect 3: The method of any one of Aspects 1 to 2, wherein the first frequency band is a first millimeter-wave frequency band and the second frequency band is a second millimeter-wave frequency band.

[0306] Aspect 4: The method of any one of Aspects 1 to 3, wherein receiving the carrier aggregation configuration includes: receiving, from the second wireless device, a configuration message, the configuration message being a broadcast message to one or more wireless devices including at least the first wireless device, a wireless device-specific message for the first wireless device, or both.

[0307] Aspect 5: The method of any one of Aspects 1 to 4, wherein receiving the carrier aggregation configuration includes: receiving, from the second wireless device, a configuration message specific to the bandwidth parts of the first frequency band and the second frequency band.

[0308] Aspect 6: The method of any one of Aspects 1 to 5, wherein receiving the carrier aggregation configuration includes: receiving, from the second wireless device, a configuration message specific to the transmission configuration indication state used by the second wireless device in the first and second frequency bands.

[0309] Aspect 7: The method of any one of Aspects 1 to 6, wherein receiving the carrier aggregation configuration includes: receiving, from the second wireless device, a configuration message that is a weighted average metric of two or more transmission configuration indication states used by the second wireless device in the first and second frequency bands.

[0310] Aspect 8: The method of Aspect 7, wherein communicating in the carrier aggregation further includes: communicating in the carrier aggregation at least partially based on a weight for use with the weighted average metric and the transmission configuration indication state of the second beam used in determining the weighted average.

[0311] Aspect 9: The method of any one of Aspects 1 to 8, wherein the first frequency band is a lower millimeter-wave frequency band and the second frequency band is a higher millimeter-wave frequency band.

[0312] Aspect 10: The method as in any one of Aspects 1 to 9, wherein the first frequency band includes frequencies between 24.25 GHz and 52.6 GHz, and the second frequency band includes frequencies greater than 52.6 GHz.

[0313] Aspect 11: The method as in any one of Aspects 1 to 10, wherein the first wireless device is a UE or a CPE in a wireless communication 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 communication system.

[0314] Aspect 12: A method for wireless communication at a second wireless device, comprising: transmitting to a first wireless device a carrier aggregation configuration for communicating with the first wireless device, the carrier aggregation configuration including at least a first frequency band and a second frequency band; and communicating with the first wireless device in the carrier aggregation using a first beam on the first frequency band and a second beam on a second millimeter wave frequency band, the first beam and the second beam being at least partially based on a beam correlation parameter, the beam correlation parameter being at least partially based on the received carrier aggregation configuration.

[0315] Aspect 13: The method as in Aspect 12, wherein transmitting the carrier aggregation configuration further includes: transmitting an inter-band carrier aggregation configuration from the second wireless device.

[0316] Aspect 14: The method as in any one of Aspects 12 to 13, wherein the first frequency band is a first millimeter wave frequency band, and the second frequency band is a second millimeter wave frequency band.

[0317] Aspect 15: The method as in any one of Aspects 12 to 14, wherein transmitting the carrier aggregation configuration includes: transmitting a configuration message to the first wireless device, the configuration message being a broadcast message to one or more wireless devices including at least the first wireless device, a wireless device-specific message for the first wireless device, or both.

[0318] Aspect 16: The method as in any one of Aspects 12 to 15, wherein transmitting the carrier aggregation configuration includes: transmitting a configuration message to the first wireless device, the configuration message being specific to a bandwidth part of the first frequency band and the second frequency band.

[0319] Aspect 17: The method as in any one of Aspects 12 to 16, wherein transmitting the carrier aggregation configuration includes: transmitting a configuration message to the first wireless device, the configuration message being specific to a transmission configuration indication state used by the second wireless device in the first and second frequency bands.

[0320] Aspect 18: The method as in any one of Aspects 12 to 17, wherein transmitting the carrier aggregation configuration includes: transmitting a configuration message to the first wireless device, the configuration message being a weighted average metric of two or more transmission configuration indication states used by the second wireless device in the first and second frequency bands.

[0321] Aspect 19: A method as in any one of Aspects 12 to 18, wherein the first frequency band is a lower millimeter wave frequency band and the second frequency band is a higher millimeter wave frequency band.

[0322] Aspect 20: A method as in any one of Aspects 12 to 19, wherein the first wireless device is a UE or a CPE in a wireless communication 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 communication system.

[0323] Aspect 21: A method as in any one of Aspects 12 to 20, wherein the first frequency band includes frequencies between 24.25 GHz and 52.6 GHz, and the second frequency band includes frequencies greater than 52.6 GHz.

[0324] Aspect 22: An apparatus for wireless communication at a first wireless device, comprising: a processor; a memory coupled to the processor, the processor and the memory being configured to perform a method as in any one of Aspects 1 to 11.

[0325] Aspect 23: A device for wireless communication at a first wireless device, comprising at least one means for performing a method as in any one of Aspects 1 to 11.

[0326] Aspect 24: 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 a method as in any one of Aspects 1 to 11.

[0327] Aspect 25: An apparatus for wireless communication at a first wireless device, comprising: a processor; a memory coupled to the processor, the processor and the memory being configured to perform a method as in any one of Aspects 12 to 21.

[0328] Aspect 26: A device comprising at least one means for performing a method as in any one of Aspects 12 to 21.

[0329] Aspect 27: A non-transitory computer-readable medium storing code, the code comprising instructions executable by a processor to perform a method as in any one of Aspects 12 to 21.

[0330] Aspect 28: A method for wireless communication at a first device, comprising: receiving, from a second wireless device, an inter-band carrier aggregation configuration for communicating with the second wireless device, the inter-band carrier aggregation configuration including at least a first millimeter wave band and a second millimeter wave band; determining beam correlation parameters at least in part based on the inter-band carrier aggregation configuration received from the second wireless device; determining a first beam for use in communicating with the second wireless device on the first millimeter wave band at least in part based on the beam correlation parameters; determining a second beam for use in communicating with the second wireless device on the second millimeter wave band at least in part based on the beam correlation parameters; and communicating with the second wireless device in an inter-band carrier aggregation mode using the first beam on the first millimeter wave band and the second beam on the second millimeter wave band.

[0331] Aspect 29: The method of aspect 28, wherein receiving the inter-band carrier aggregation configuration comprises: receiving a configuration message from the second wireless device, the configuration message being a broadcast message to one or more wireless devices including at least the first wireless device, a wireless device specific message for the first wireless device, or both.

[0332] Aspect 30: The method of any one of aspects 28 or 29, wherein receiving the inter-band carrier aggregation configuration comprises: receiving a configuration message from the second wireless device that is specific to the bandwidth parts of the first and second millimeter wave bands.

[0333] Aspect 31: The method of any one of aspects 28 to 30, wherein receiving the inter-band carrier aggregation configuration comprises: receiving a configuration message from the second wireless device that is specific to the transmission configuration indication state used by the second wireless device in the first and second millimeter wave bands.

[0334] Aspect 32: The method of any one of aspects 28 to 31, wherein receiving the inter-band carrier aggregation configuration comprises: receiving a configuration message from the second wireless device that is a weighted average metric of two or more transmission configuration indication states used by the second wireless device in the first and second millimeter wave bands.

[0335] Aspect 33: The method of any one of aspects 28 to 32, further comprising: determining a weight for use with the weighted average metric and a transmission configuration indication of the second beam used in determining the weighted average.

[0336] Aspect 34: The method of any one of aspects 28 to 33, wherein the first millimeter wave band is a lower millimeter wave band and the second millimeter wave band is a higher millimeter wave band.

[0337] Aspect 35: A method as in any one of aspects 28 to 34, wherein the first millimeter-wave band includes frequencies between 24.25 GHz and 52.6 GHz, and the second millimeter-wave band includes frequencies greater than 52.6 GHz.

[0338] Aspect 36: A method as in any one of aspects 28 to 35, wherein the first wireless device is a UE or a CPE in a wireless communication 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 communication system.

[0339] Aspect 37: A method for wireless communication at a second wireless device, comprising: transmitting to a first wireless device an inter-band carrier aggregation configuration for communicating with the first wireless device, the inter-band carrier aggregation configuration including at least a first millimeter-wave band and a second millimeter-wave band; determining beam correlation parameters based on the inter-band carrier aggregation configuration; and communicating with the first wireless device in an inter-band carrier aggregation mode using a first beam on the first millimeter-wave band and a second beam on the second millimeter-wave band, the first beam and the second beam being at least partially based on the beam correlation parameters.

[0340] Aspect 38: A method as in any one of aspects 28 to 37, wherein transmitting the inter-band carrier aggregation configuration includes: transmitting a configuration message to the first wireless device, the configuration message being a broadcast message to one or more wireless devices including at least the first wireless device, a wireless device-specific message for the first wireless device, or both.

[0341] Aspect 39: A method as in any one of aspects 28 to 38, wherein transmitting the inter-band carrier aggregation configuration includes: transmitting a configuration message to the first wireless device that is specific to the bandwidth parts of the first and second millimeter-wave bands.

[0342] Aspect 40: A method as in any one of aspects 28 to 39, wherein transmitting the inter-band carrier aggregation configuration includes: transmitting a configuration message to the first wireless device that is specific to the transmission configuration indication state used by the second wireless device in the first and second millimeter-wave bands.

[0343] Aspect 41: A method as in any one of aspects 28 to 40, wherein transmitting the inter-band carrier aggregation configuration includes: transmitting a configuration message to the first wireless device that is a weighted average measure of two or more transmission configuration indication states used by the second wireless device in the first and second millimeter-wave bands.

[0344] Aspect 42: A method as in any one of aspects 28 to 41, wherein the first millimeter-wave band is a lower millimeter-wave band and the second millimeter-wave band is a higher millimeter-wave band.

[0345] Aspect 43: A method as in any of aspects 28 to 41, wherein the first wireless device is a UE or a CPE in a wireless communication 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 communication system.

[0346] Aspect 44: A method as in any of aspects 28 to 43, wherein the first millimeter wave band includes frequencies between 24.25 GHz and 52.6 GHz, and the second millimeter wave band includes frequencies greater than 52.6 GHz.

[0347] Aspect 45: A method as in any of aspects 28 to 17, wherein: transmitting the first reference signal includes transmitting the first reference signal using a first resource block; and transmitting the second reference signal includes transmitting the second reference signal using a second resource block that does not overlap with the first resource block in the frequency domain.

[0348] Aspect 46: A device for wireless communication, including at least one means for performing the method as in any of aspects 28 to 45.

[0349] Aspect 47: A device for wireless communication, including: a processor; a memory in electronic communication with the processor; and instructions stored in the memory and executable by the processor to cause the device to perform the method as in any of aspects 28 to 45.

[0350] Aspect 48: A non-transitory computer-readable medium storing code for wireless communication, including: a processor; a memory in electronic communication with the processor; and instructions stored in the memory and executable by the processor to cause the device to perform the method as in any of aspects 28 to 45.

Claims

1. A method for wireless communication at a first wireless device, comprising: Receiving, from a second wireless device, a carrier aggregation configuration for communicating with the second wireless device, the carrier aggregation configuration including at least a first frequency band and a second frequency band; And Communicating with the second wireless device in a carrier aggregation using a first beam on the first frequency band and a second beam on the second frequency band, the first beam and the second beam being at least partially based on a beam correlation parameter, the beam correlation parameter at least partially based on the received carrier aggregation configuration and at least partially based on the carrier aggregation of the first frequency band and the second frequency band in a direction to indicate a correlation between the first beam and the second beam in the direction.

2. The method according to claim 1, wherein receiving the carrier aggregation configuration further comprises: Receiving an inter-band carrier aggregation configuration from the second wireless device.

3. The method according to claim 1, wherein the first frequency band is a first millimeter wave frequency band and the second frequency band is a second millimeter wave frequency band.

4. The method according to claim 1, wherein receiving the carrier aggregation configuration comprises: Receiving a configuration message from the second wireless device, the configuration message being a broadcast message to one or more wireless devices including at least the first wireless device, a wireless device specific message for the first wireless device, or both.

5. The method according to claim 1, wherein receiving the carrier aggregation configuration comprises: Receiving a configuration message from the second wireless device that is specific to a bandwidth part of the first frequency band and the second frequency band.

6. The method according to claim 1, wherein receiving the carrier aggregation configuration comprises: Receiving a configuration message from the second wireless device that is specific to a transmission configuration indication state used by the second wireless device in the first frequency band and the second frequency band.

7. The method according to claim 1, wherein receiving the carrier aggregation configuration comprises: Receiving a configuration message from the second wireless device that is a weighted average metric of two or more transmission configuration indication states used by the second wireless device in the first frequency band and the second frequency band.

8. The method according to claim 7, wherein communicating in the carrier aggregation further comprises: Communicating in the carrier aggregation at least partially based on a weight for use with the weighted average metric and the transmission configuration indication state of the second beam used in determining the weighted average.

9. The method according to claim 1, wherein the first frequency band is a lower millimeter wave frequency band and the second frequency band is a higher millimeter wave frequency band.

10. The method according to claim 1, wherein the first frequency band includes frequencies between 24.25 GHz and 52.6 GHz, and the second frequency band includes frequencies greater than 52.6 GHz.

11. The method according to claim 1, wherein the first wireless device is a user equipment (UE) or a client premises equipment (CPE) in a wireless communication system, and the second wireless device is a base station, a CPE, a relay device, a router, a repeater, or an integrated access and backhaul (IAB) node in the wireless communication system.

12. A method for wireless communication at a second wireless device, comprising: transmitting to a first wireless device a carrier aggregation configuration for communicating with the first wireless device, the carrier aggregation configuration including at least a first frequency band and a second frequency band; and communicating with the first wireless device in a carrier aggregation using a first beam on the first frequency band and a second beam on the second frequency band, the first beam and the second beam being at least partially based on a beam correlation parameter, the beam correlation parameter at least partially based on the received carrier aggregation configuration and at least partially based on the carrier aggregation of the first frequency band and the second frequency band in a direction to indicate the correlation between the first beam and the second beam in the direction.

13. The method according to claim 12, wherein transmitting the carrier aggregation configuration further comprises: transmitting an inter-band carrier aggregation configuration from the second wireless device.

14. The method according to claim 12, wherein the first frequency band is a first millimeter wave frequency band and the second frequency band is a second millimeter wave frequency band.

15. The method according to claim 12, wherein transmitting the carrier aggregation configuration comprises: transmitting a configuration message to the first wireless device, the configuration message being a broadcast message to one or more wireless devices including at least the first wireless device, a wireless device specific message for the first wireless device, or both.

16. The method according to claim 12, wherein transmitting the carrier aggregation configuration comprises: transmitting a configuration message to the first wireless device specific to the bandwidth parts of the first frequency band and the second frequency band.

17. The method according to claim 12, wherein transmitting the carrier aggregation configuration comprises: transmitting a configuration message to the first wireless device specific to the transmission configuration indication state used by the second wireless device in the first frequency band and the second frequency band.

18. The method according to claim 12, wherein transmitting the carrier aggregation configuration comprises: transmitting a configuration message to the first wireless device, the configuration message being a weighted average metric of two or more transmission configuration indication states used by the second wireless device in the first frequency band and the second frequency band.

19. The method according to claim 12, wherein the first frequency band is a lower millimeter wave frequency band and the second frequency band is a higher millimeter wave frequency band.

20. The method according to claim 12, wherein the first wireless device is a user equipment (UE) or a client premises equipment (CPE) in a wireless communication system, and the second wireless device is a base station, a CPE, a relay device, a router, a repeater, or an integrated access and backhaul (IAB) node in the wireless communication system.

21. The method according to claim 12, wherein the first frequency band includes frequencies between 24.25 GHz and 52.6 GHz, and the second frequency band includes frequencies greater than 52.6 GHz.

22. An apparatus for wireless communication at a first wireless device, comprising: means for receiving, from a second wireless device, a carrier aggregation configuration for communicating with the second wireless device, the carrier aggregation configuration including at least a first frequency band and a second frequency band; and means for communicating with the second wireless device in a carrier aggregation using a first beam on the first frequency band and a second beam on the second frequency band, the first beam and the second beam being at least partially based on a beam correlation parameter, the beam correlation parameter at least partially based on the received carrier aggregation configuration and at least partially based on the carrier aggregation of the first frequency band and the second frequency band in a direction to indicate the correlation between the first beam and the second beam in the direction.

23. The apparatus according to claim 22, further comprising: means for receiving, from the second wireless device, an inter-band carrier aggregation configuration.

24. The apparatus according to claim 22, wherein the first frequency band is a first millimeter wave frequency band and the second frequency band is a second millimeter wave frequency band.

25. The apparatus according to claim 22, further comprising: means for receiving, from the second wireless device, a configuration message, the configuration message being a broadcast message to one or more wireless devices including at least the first wireless device, a wireless device specific message for the first wireless device, or both.

26. The apparatus according to claim 22, further comprising: means for receiving, from the second wireless device, a configuration message specific to a bandwidth part of the first frequency band and the second frequency band.

27. An apparatus for wireless communication at a second wireless device, comprising: means for transmitting, to a first wireless device, a carrier aggregation configuration for communicating with the first wireless device, the carrier aggregation configuration including at least a first frequency band and a second frequency band; and means for communicating with the first wireless device in a carrier aggregation using a first beam on the first frequency band and a second beam on the second frequency band, the first beam and the second beam being at least partially based on a beam correlation parameter, the beam correlation parameter at least partially based on the received carrier aggregation configuration and at least partially based on the carrier aggregation of the first frequency band and the second frequency band in a direction to indicate the correlation between the first beam and the second beam in the direction.

28. The apparatus according to claim 27, further comprising: means for transmitting, from the second wireless device, an inter-band carrier aggregation configuration.

29. The apparatus according to claim 28, wherein the first frequency band is a first millimeter wave frequency band and the second frequency band is a second millimeter wave frequency band.

30. The apparatus according to claim 28, further comprising: Apparatus for transmitting a configuration message to the first wireless device, the configuration message being a broadcast message to one or more wireless devices including at least the first wireless device, a wireless device specific message for the first wireless device, or both.

31. An apparatus for wireless communication at a first wireless device, comprising: One or more memories; And One or more processors, the one or more processors being coupled to the one or more memories and configured to cause the first wireless device to: Receive from a second wireless device a carrier aggregation configuration for communicating with the second wireless device, the carrier aggregation configuration including at least a first frequency band and a second frequency band; And Communicate with the second wireless device in a carrier aggregation using a first beam on the first frequency band and a second beam on the second frequency band, the first beam and the second beam being at least partially based on a beam correlation parameter, the beam correlation parameter at least partially based on the received carrier aggregation configuration and at least partially based on the carrier aggregation of the first frequency band and the second frequency band in a direction to indicate the correlation between the first beam and the second beam in the direction.

32. The apparatus of claim 31, wherein the one or more processors are configured to cause the first wireless device to: Receive an inter-band carrier aggregation configuration from the second wireless device.

33. The apparatus of claim 31, wherein the first frequency band is a first millimeter wave frequency band and the second frequency band is a second millimeter wave frequency band.

34. The apparatus of claim 31, wherein the one or more processors are configured to cause the first wireless device to: Receive from the second wireless device a configuration message, the configuration message being a broadcast message to one or more wireless devices including at least the first wireless device, a wireless device specific message for the first wireless device, or both.

35. The apparatus of claim 31, wherein the one or more processors are configured to cause the first wireless device to: Receive from the second wireless device a configuration message specific to a bandwidth part of the first frequency band and the second frequency band.

36. The apparatus of claim 31, wherein the one or more processors are configured to cause the first wireless device to: Receive from the second wireless device a configuration message specific to a transmission configuration indication state used by the second wireless device in the first frequency band and the second frequency band.

37. The apparatus of claim 31, wherein the one or more processors are configured to cause the first wireless device to: Receive from the second wireless device a configuration message as a weighted average measure of two or more transmission configuration indication states used by the second wireless device in the first frequency band and the second frequency band.

38. The apparatus of claim 37, wherein the one or more processors are configured to cause the first wireless device to: Communicate in carrier aggregation at least in part based on weights for use with the weighted average metric and a transmission configuration indication status of the second beam used in determining the weighted average.

39. The apparatus of claim 31, wherein the first band is a lower millimeter wave band and the second band is a higher millimeter wave band.

40. The apparatus of claim 31, wherein the first band includes frequencies between 24.25 GHz and 52.6 GHz and the second band includes frequencies greater than 52.6 GHz.

41. The apparatus of claim 31, wherein the first wireless device is a user equipment (UE) or a client premises equipment (CPE) in a wireless communication system and the second wireless device is a base station, a CPE, a relay device, a router, a repeater, or an integrated access and backhaul (IAB) node in the wireless communication system.

42. An apparatus for wireless communication at a second wireless device, comprising: one or more memories; and one or more processors coupled to the one or more memories and configured to cause the second wireless device to: transmit to a first wireless device a carrier aggregation configuration for communicating with the first wireless device, the carrier aggregation configuration including at least a first band and a second band; and communicate with the first wireless device in carrier aggregation using a first beam on the first band and a second beam on the second band, the first beam and the second beam being at least in part based on a beam correlation parameter that at least in part is based on the received carrier aggregation configuration and at least in part based on carrier aggregation of the first band and the second band in a direction to indicate a correlation between the first beam and the second beam in the direction.

43. The apparatus of claim 42, wherein the one or more processors are configured to cause the second wireless device to: transmit an inter-band carrier aggregation configuration from the second wireless device.

44. The apparatus of claim 42, wherein the first band is a first millimeter wave band and the second band is a second millimeter wave band.

45. The apparatus of claim 42, wherein the one or more processors are configured to cause the second wireless device to: transmit a configuration message to the first wireless device, the configuration message being a broadcast message to one or more wireless devices including at least the first wireless device, a wireless device specific message for the first wireless device, or both.

46. The apparatus of claim 42, wherein the one or more processors are configured to cause the second wireless device to: transmit a configuration message specific to a bandwidth part of the first band and the second band to the first wireless device.

47. The apparatus of claim 42, wherein the one or more processors are configured to cause the second wireless device to: Transmit a configuration message to the first wireless device, the configuration message being specific to the transmission configuration indication status used by the second wireless device in the first frequency band and the second frequency band.

48. The apparatus according to claim 42, wherein the one or more processors are configured to cause the second wireless device to: Transmit a configuration message to the first wireless device, the configuration message being a weighted average metric of two or more transmission configuration indication statuses used by the second wireless device in the first frequency band and the second frequency band.

49. The apparatus according to claim 42, wherein the first frequency band is a lower millimeter wave frequency band and the second frequency band is a higher millimeter wave frequency band.

50. The apparatus according to claim 42, wherein the first wireless device is a user equipment (UE) or a client premise equipment (CPE) in a wireless communication system, and the second wireless device is a base station, a CPE, a relay device, a router, a repeater, or an integrated access and backhaul (IAB) node in the wireless communication system.

51. The apparatus according to claim 42, wherein the first frequency band includes frequencies between 24.25 GHz and 52.6 GHz, and the second frequency band includes frequencies greater than 52.6 GHz.

52. A computer-readable medium storing code for wireless communication at a first wireless device, the code including instructions executable by one or more processors to cause the first wireless device to: Receive, from a second wireless device, a carrier aggregation configuration for communicating with the second wireless device, the carrier aggregation configuration including at least a first frequency band and a second frequency band; and Communicate with the second wireless device in a carrier aggregation using a first beam on the first frequency band and a second beam on the second frequency band, the first beam and the second beam being at least partially based on a beam correlation parameter, the beam correlation parameter indicating the correlation between the first beam and the second beam in a direction at least partially based on the received carrier aggregation configuration and at least partially based on the carrier aggregation of the first frequency band and the second frequency band in the direction.

53. The computer-readable medium according to claim 52, wherein the instructions can further be executed by the one or more processors to cause the first wireless device to: Receive an inter-band carrier aggregation configuration from the second wireless device.

54. The computer-readable medium according to claim 52, wherein the first frequency band is a first millimeter wave frequency band and the second frequency band is a second millimeter wave frequency band.

55. The computer-readable medium according to claim 52, wherein the instructions can further be executed by the one or more processors to cause the first wireless device to: Receive a configuration message from the second wireless device, the configuration message being a broadcast message to one or more wireless devices including at least the first wireless device, a wireless device-specific message for the first wireless device, or both.

56. The computer-readable medium according to claim 52, wherein the instructions can be further executed by the one or more processors to cause the first wireless device to: Receive, from the second wireless device, a configuration message specific to a bandwidth part of the first frequency band and the second frequency band.

57. The computer-readable medium according to claim 52, wherein the instructions can be further executed by the one or more processors to cause the first wireless device to: Receive, from the second wireless device, a configuration message specific to a transmission configuration indication state used by the second wireless device in the first frequency band and the second frequency band.

58. The computer-readable medium according to claim 52, wherein the instructions can be further executed by the one or more processors to cause the first wireless device to: Receive, from the second wireless device, a configuration message that is a weighted average metric of two or more transmission configuration indication states used by the second wireless device in the first frequency band and the second frequency band.

59. The computer-readable medium according to claim 58, wherein the instructions can be further executed by the one or more processors to cause the first wireless device to: Communicate in carrier aggregation at least in part based on weights for use with the weighted average metric and the transmission configuration indication state of the second beam used in determining the weighted average.

60. The computer-readable medium according to claim 52, wherein the first frequency band is a lower millimeter wave frequency band and the second frequency band is a higher millimeter wave frequency band.

61. The computer-readable medium according to claim 52, wherein the first frequency band includes frequencies between 24.25 GHz and 52.6 GHz and the second frequency band includes frequencies greater than 52.6 GHz.

62. The computer-readable medium according to claim 52, wherein the first wireless device is a user equipment (UE) or a client premise equipment (CPE) in a wireless communication system, and the second wireless device is a base station, a CPE, a relay device, a router, a repeater, or an integrated access and backhaul (IAB) node in the wireless communication system.

63. A computer-readable medium storing code for wireless communication at a second wireless device, the code including instructions executable by one or more processors to cause the second wireless device to: Transmit to a first wireless device a carrier aggregation configuration for communicating with the first wireless device, the carrier aggregation configuration including at least a first frequency band and a second frequency band; and Communicate with the first wireless device in carrier aggregation using a first beam on the first frequency band and a second beam on the second frequency band, the first beam and the second beam being at least in part based on a beam correlation parameter that at least in part indicates a correlation between the first beam and the second beam in a direction based on the received carrier aggregation configuration and at least in part based on carrier aggregation of the first frequency band and the second frequency band in a direction.

64. The computer-readable medium of claim 63, wherein the instructions are further executable by the one or more processors to cause the second wireless device to: Convey an inter-band carrier aggregation configuration from the second wireless device.

65. The computer-readable medium of claim 63, wherein the first frequency band is a first millimeter-wave frequency band and the second frequency band is a second millimeter-wave frequency band.

66. The computer-readable medium of claim 63, wherein the instructions are further executable by the one or more processors to cause the second wireless device to: Transmit a configuration message to the first wireless device, the configuration message being a broadcast message to one or more wireless devices including at least the first wireless device, a wireless device-specific message for the first wireless device, or both.

67. The computer-readable medium of claim 63, wherein the instructions are further executable by the one or more processors to cause the second wireless device to: Transmit a configuration message to the first wireless device that is specific to a bandwidth part of the first frequency band and the second frequency band.

68. The computer-readable medium of claim 63, wherein the instructions are further executable by the one or more processors to cause the second wireless device to: Transmit a configuration message to the first wireless device that is specific to a transmission configuration indication state used by the second wireless device in the first frequency band and the second frequency band.

69. The computer-readable medium of claim 63, wherein the instructions are further executable by the one or more processors to cause the second wireless device to: Transmit a configuration message to the first wireless device that is a weighted average metric of two or more transmission configuration indication states used by the second wireless device in the first frequency band and the second frequency band.

70. The computer-readable medium of claim 63, wherein the first frequency band is a lower millimeter-wave frequency band and the second frequency band is a higher millimeter-wave frequency band.

71. The computer-readable medium of claim 63, wherein the first wireless device is a user equipment (UE) or a client premise equipment (CPE) in a wireless communication system, and the second wireless device is a base station, a CPE, a relay device, a router, a repeater, or an integrated access and backhaul (IAB) node in the wireless communication system.

72. The computer-readable medium of claim 63, wherein the first frequency band includes frequencies between 24.25 GHz and 52.6 GHz, and the second frequency band includes frequencies greater than 52.6 GHz.

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