Signaling of beam correlation across millimeter wave bands

Abstract

Signaling of beam correlation across millimeter wave bands is disclosed. 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 bands for communication. The first wireless device may determine a beam correlation parameter based on the carrier aggregation configuration. The first wireless device may determine beams in the two frequency bands based on the beam correlation parameters. A first wireless device and a second wireless device may communicate in a carrier aggregation using a beam on a first frequency band and a second beam on a second frequency band.

Description

[0001] This application is a divisional application of the Chinese patent application with an application date of January 26, 2021, application number 202180010256.9 (international application number PCT / US2021 / 015055), and invention name “Signaling of beam correlation across millimeter wave bands”.

[0002] Cross-references

[0003] This patent application claims priority to U.S. patent application No. 17 / 157,907, filed by RAGHAVAN et al. on January 25, 2021, entitled “SIGNALING OF BEAM CORRELATION ACROSS MILLIMETER WAVE FREQUENCY BANDS,” and U.S. provisional patent application No. 62 / 966,533, filed by RAGHAVAN et al. on January 27, 2020, entitled “SIGNALING OF BEAM CORRELATION ACROSS MILLIMETER WAVE FREQUENCY BANDS,” each of which is assigned to the assignee of this application. Technical Field

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

[0005] Wireless communication systems are widely deployed to provide various types of communication content, such as voice, video, packet data, messaging, broadcast, and the like. These systems may be able to support communication with multiple users by sharing available system resources (e.g., time, frequency, and power). Examples of such multiple access systems include fourth generation (4G) systems (such as long term evolution (LTE) systems, advanced LTE (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 technologies, such as code division multiple access (CDMA), time division multiple access (TDMA), frequency division multiple access (FDMA), orthogonal frequency division multiple access (OFDMA), or discrete Fourier transform spread orthogonal frequency division multiplexing (DFT-S-OFDM). A wireless multiple access communication system may include one or more base stations or one or more network access nodes, each base station or network access node simultaneously supporting communication with multiple communication devices, which may be further referred to as user equipment (UE). Summary of the Invention

[0006] 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 also include 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 based on a beam correlation parameter based on the received carrier aggregation configuration.

[0007] 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 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 based on a beam correlation parameter based on the received carrier aggregation configuration.

[0008] Another apparatus for wireless communication at a first wireless device is described. The apparatus 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 apparatus may also include means for communicating with the second 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 based on a beam correlation parameter based on the received carrier aggregation configuration.

[0009] 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 also include instructions for communicating with the second 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 based on a beam correlation parameter based on the received carrier aggregation configuration.

[0010] 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, means, or instructions for receiving an inter-band carrier aggregation configuration from a second wireless device.

[0011] 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.

[0012] 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, means, or instructions for receiving a configuration message from a second wireless device as a broadcast message to one or more wireless devices including at least a first wireless device, a wireless device-specific message to the first wireless device, or both.

[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, means, or instructions for receiving a configuration message from a second wireless device specific to bandwidth portions of a first frequency band and a second frequency band.

[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, means, or instructions for receiving a configuration message from a second wireless device, the configuration message being specific to the second wireless device being in a transmission configuration indicating a state for use in a first frequency band and a 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, means, or instructions for receiving a configuration message from a second wireless device that is a weighted average metric of two or more transmission configurations used by the second wireless device in a first frequency band and a second frequency band.

[0016] In some examples of the methods, apparatuses (devices), and non-transitory computer-readable media described herein, communicating in carrier aggregation may include operations, features, apparatuses, or instructions for communicating in carrier aggregation based on a weight for use with the weighted average metric and a transmission configuration indication state of a second beam used in determining the weighted average.

[0017] 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.

[0018] 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.

[0019] 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 customer premises 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.

[0020] A method for wireless communication at a second wireless device is described. The method may include transmitting a carrier aggregation configuration to a first wireless device 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 also include 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 based on a beam correlation parameter based on the received carrier aggregation configuration.

[0021] 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 a carrier aggregation configuration for communication with the first wireless device to a 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 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 based on a beam correlation parameter based on the received carrier aggregation configuration.

[0022] Another apparatus for wireless communication at a second wireless device is described. The apparatus 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 apparatus may also include means for communicating with the first wireless device in 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 based on the received carrier aggregation configuration.

[0023] 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 a carrier aggregation configuration for communicating with the first wireless device to a 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 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 based on a beam correlation parameter based on the received carrier aggregation configuration.

[0024] 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, means, or instructions for transmitting an inter-band carrier aggregation configuration from a second wireless device.

[0025] 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.

[0026] 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, means, or instructions for transmitting a configuration message to a first wireless device as a broadcast message to one or more wireless devices including at least the first wireless device, as a wireless device-specific message to the first wireless device, or both.

[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, means, or instructions for transmitting a configuration message specific to bandwidth portions of a first frequency band and a second frequency band to a first wireless device.

[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, means, or instructions for transmitting a configuration message to a first wireless device that is specific to a transmission configuration indicating a state for use by a second wireless device in a first frequency band and a 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, means, or instructions for transmitting a configuration message to a first wireless device that is a weighted average metric of two or more transmission configurations used by a second wireless device in a first frequency band and a second frequency band.

[0030] 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.

[0031] 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 CPE in a wireless communication system, and the second wireless device may be a base station, CPE, relay device, router, repeater, or IAB node in the wireless communication system.

[0032] 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.

[0033] Another method of 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 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 frequency 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 frequency 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 frequency band and the second beam on the second millimeter-wave frequency band.

[0034] 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 are executable by the processor to cause the apparatus to: receive, from a second wireless device, an inter-band carrier aggregation configuration for communication 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 a beam correlation parameter based on the inter-band carrier aggregation configuration received from the second wireless device; determine a first beam for use in communication with the second wireless device on the first millimeter-wave frequency band based on the beam correlation parameter; determine a second beam for use in communication with the second wireless device on the second millimeter-wave frequency band based on the beam correlation parameter; 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.

[0035] Another apparatus for wireless communication at a first wireless device is described. The apparatus may include means for receiving, from a second wireless device, an inter-band carrier aggregation configuration for communication 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 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 communication with the second wireless device on the first millimeter-wave frequency band based on the beam correlation parameter; determining a second beam for use in communication with the second wireless device on the second millimeter-wave frequency 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 frequency band and the second beam on the second millimeter-wave frequency band.

[0036] Another 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 to: receive, from a second wireless device, an inter-band carrier aggregation configuration for communication 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 a beam correlation parameter based on the inter-band carrier aggregation configuration received from the second wireless device; determine a first beam for use in communication with the second wireless device on the first millimeter-wave frequency band based on the beam correlation parameter; determine a second beam for use in communication with the second wireless device on the second millimeter-wave frequency band based on the beam correlation parameter; 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.

[0037] 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, means, or instructions for receiving a configuration message from a second wireless device as a broadcast message to one or more wireless devices including at least a first wireless device, a wireless device-specific message to the first wireless device, or both.

[0038] 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, means, or instructions for receiving a configuration message specific to bandwidth portions of the first and second millimeter wave frequency bands from a second wireless device.

[0039] 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, means, or instructions for receiving a configuration message from a second wireless device that is specific to the second wireless device being in a transmission configuration indication state for use in the first and second millimeter wave frequency bands.

[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, means, or instructions for receiving a configuration message from a second wireless device that is a weighted average metric of two or more transmission configurations used by the second wireless device in the first and second millimeter wave frequency bands.

[0041] Some examples of the methods, apparatus (devices), and non-transitory computer-readable media described herein may further include operations, features, apparatuses, or instructions for determining weights for use with a weighted average metric and a transmission configuration indication of a second beam for use in determining the weighted average.

[0042] 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.

[0043] In some examples of the methods, apparatuses, 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.

[0044] 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 CPE in a wireless communication system, and the second wireless device may be a base station, CPE, relay device, router, repeater, or IAB node in the wireless communication system.

[0045] A method of wireless communication at a second wireless device is described. The method may include transmitting an inter-band carrier aggregation configuration to a first wireless device for communicating with 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 a beam correlation parameter 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 parameter.

[0046] An apparatus for wireless communication at a second wireless device is described. The apparatus may include a processor, a memory coupled to the processor, and instructions stored in the memory. The instructions are executable by the processor to cause the apparatus to: transmit an inter-band carrier aggregation configuration to a first wireless device for communication with 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; determine a beam correlation parameter 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 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 parameter.

[0047] Another apparatus for wireless communication at a second wireless device is described. The apparatus may include means for transmitting an inter-band carrier aggregation configuration to a first wireless device for communication with 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 a beam correlation parameter 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 parameter.

[0048] 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 an inter-band carrier aggregation configuration to a first wireless device for communication with 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; determine a beam correlation parameter 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 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 parameter.

[0049] In some examples of the methods, apparatuses (devices), and non-transitory computer-readable media described herein, transmitting an inter-band carrier aggregation configuration may include operations, features, means, or instructions for transmitting a configuration message to a first wireless device as a broadcast message to one or more wireless devices including at least the first wireless device, as a wireless device-specific message to the first wireless device, or both.

[0050] In some examples of the methods, apparatuses (devices), and non-transitory computer-readable media described herein, transmitting an inter-band carrier aggregation configuration may include operations, features, means, or instructions for transmitting a configuration message specific to bandwidth portions of the first and second millimeter wave frequency bands to a first wireless device.

[0051] In some examples of the methods, apparatuses (devices), and non-transitory computer-readable media described herein, transmitting an inter-band carrier aggregation configuration may include operations, features, means, or instructions for transmitting a configuration message to a first wireless device that is specific to a second wireless device being in a transmission configuration indication state for use in first and second millimeter wave frequency bands.

[0052] In some examples of the methods, apparatuses (devices), and non-transitory computer-readable media described herein, transmitting an inter-band carrier aggregation configuration may include operations, features, means, or instructions for transmitting a configuration message to a first wireless device that is a weighted average metric of two or more transmission configurations indicating states of 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, 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.

[0054] 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 CPE in a wireless communication system, and the second wireless device may be a base station, CPE, relay device, router, repeater, or IAB node in the wireless communication system.

[0055] In some examples of the methods, apparatuses, 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

[0056] Figure 1 An example of a wireless communication system supporting signaling of beam correlation across millimeter wave frequency bands in accordance with aspects of the present disclosure is illustrated.

[0057] Figure 2 An example of a wireless communication device with multiple antenna arrays that supports signaling of beam correlation across millimeter wave frequency bands in accordance with aspects of the present disclosure is illustrated.

[0058] Figure 3 An example of a wireless communication system supporting signaling of beam correlation across millimeter wave frequency bands in accordance with aspects of the present disclosure is illustrated.

[0059] Figure 4 An example of a wireless communication system supporting signaling of beam correlation across millimeter wave frequency bands in accordance with aspects of the present disclosure is illustrated.

[0060] Figure 5 An example of a process flow for signaling supporting beam correlation across millimeter wave frequency bands is illustrated in accordance with aspects of the present disclosure.

[0061] Figure 6 and 7 A block diagram of a device supporting signaling of beam correlation across millimeter wave frequency bands is shown, in accordance with aspects of the present disclosure.

[0062] Figure 8 A block diagram of a communications manager supporting signaling of beam correlation across millimeter wave frequency bands is shown, in accordance with aspects of the present disclosure.

[0063] Figure 9 A diagram of a system including devices supporting signaling of beam correlation across millimeter wave frequency bands is shown in accordance with aspects of the present disclosure.

[0064] Figure 10 and 11 A block diagram of a device supporting signaling of beam correlation across millimeter wave frequency bands is shown, in accordance with aspects of the present disclosure.

[0065] Figure 12 A block diagram of a communications manager supporting signaling of beam correlation across millimeter wave frequency bands is shown, in accordance with aspects of the present disclosure.

[0066] Figure 13 A diagram of a system including devices supporting signaling of beam correlation across millimeter wave frequency bands is shown in accordance with aspects of the present disclosure.

[0067] Figures 14 to 23 A flow chart illustrating a method of signaling supporting beam correlation across millimeter wave frequency bands according to aspects of the present disclosure is shown. DETAILED DESCRIPTION

[0068] In some deployments, wireless communication systems may operate in the 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, obstacle loss), which may be affected by various factors such as diffraction, propagation environment, obstacle density, material properties, etc. As a result, signal processing techniques (such as beamforming) may be used to coherently combine energy and overcome path losses at these frequencies. Due to the increased amount of path, penetration, and obstacle losses in mmW communication systems, transmissions between wireless devices (e.g., from base stations and / or user equipment (UE)) may be beamformed. In addition, the receiving device may use beamforming techniques to configure antennas and / or antenna arrays and / or antenna array modules so that transmissions are received in a directional manner.

[0069] Some wireless communication systems may employ carrier aggregation techniques, in which communications are conveyed simultaneously or concurrently between devices using multiple component carriers. In some examples, such techniques may be configured to increase information throughput between devices compared to communications using a single component carrier. Carrier aggregation techniques may 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 frequency bands that do not overlap in the frequency domain) may be referred to as "inter-band" carrier aggregation.

[0070] In some cases, carrier aggregation may rely on signals using different frequency bands being received in the same or similar directions (e.g., with the highest received power direction within a threshold separation angle, using receive beams or directions with good correlation), or may be performed in other ways at this time. For example, carrier aggregation may be associated with favorable spectral efficiency when the receive directions at the receiving device can use 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 beams or directions of different frequency bands are not well correlated), it may be preferable to perform carrier aggregation using different sets of transmit or receive beams, or to refrain from performing communications according to carrier aggregation. Thus, procedures and metrics for evaluating beam correlation may be beneficial in supporting various aspects of carrier aggregation, including various examples of inter-band carrier aggregation or intra-band carrier aggregation.

[0071] In some deployments, communications in mmW frequencies may utilize so-called Frequency Range 2 (FR2), which corresponds to deployments in 24 GHz, 26 GHz, 28 GHz, 39 GHz, and so on. As demand for wireless communications 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 arrays of four antenna elements per module in a 4x1 array arrangement, among other example configurations. Higher mmW frequency 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 containing four 4x4 subarrays. In some cases, it may be easier for a wireless device (e.g., a UE) to use or manage some possible antenna element combinations across subarrays within an antenna module or across antenna modules than other combinations.

[0072] In some cases, a wireless device can perform inter-band carrier aggregation in both 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 communications with other wireless devices may be different in FR2 and FR4. For example, a wireless device may detect a cluster at 28 GHz but not a cluster at 60 GHz in the same direction. As used herein, a cluster may refer to one or more signals in a specific physical direction or bandwidth. For example, a cluster may be detected as one or more beams in a specific bandwidth of approximately 28 or 60 GHz, some of which may be subject to multipath or other environmental degradation.

[0073] Aspects of the present disclosure provide that a first wireless device may configure beam correlation parameters across mmW frequency bands in FR2 and FR4 of an inter-band carrier aggregation system to determine communication beams. The 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 frequency 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, a bandwidth portion specific to FR2 and FR4, a transmission configuration indication (TCI) state specific to 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 the beam correlation parameter based on the carrier aggregation configuration. For example, the beam correlation parameter may indicate correlation between beams in directions with co-directional beams in two mmW frequency bands using inter-band carrier aggregation. The first wireless device may determine beams in FR2 and FR4 based on the beam correlation parameter and communicate with the second wireless device using these beams. A wireless device can communicate using beams determined based on beam correlation parameters in both FR2 and FR4. For example, a wireless device can detect a cluster at 28 GHz (in FR2) and a cluster at 60 GHz (in FR4). Thus, when communicating based on beam correlation parameters, the wireless device can detect a cluster at 28 GHz and a cluster at 60 GHz in the same direction as the transmitted beam.

[0074] The described techniques may support signaling that improves beam correlation across millimeter wave bands, reduces signaling overhead, and improves reliability. Thus, the supported techniques may include improved network operation and, in some examples, increased network efficiency.

[0075] Various aspects of the present disclosure are initially described in the context of wireless communication systems. Examples of antenna modules and antenna element groups are subsequently discussed for some aspects. Various aspects of the present disclosure are further illustrated and described with reference to apparatus diagrams, system diagrams, and flow charts related to signaling beam correlation across millimeter wave frequency bands.

[0076] Figure 1 An example of a wireless communication system 100 that supports signaling of beam correlation across millimeter wave frequency bands in accordance with various 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 Advanced LTE (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.

[0077] Base stations 105 may be dispersed throughout a geographic area to form wireless communication system 100 and may be different forms of devices or devices with different capabilities. Base stations 105 and UEs 115 may communicate wirelessly via one or more communication links 125. Each base station 105 may provide a coverage area 110 over which UEs 115 and base stations 105 may establish one or more communication links 125. Coverage area 110 may be an example of a geographic area over which base stations 105 and UEs 115 may support signal communication according to one or more radio access technologies.

[0078] 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. Figure 1 1. The UE 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, CPE, integrated access and backhaul (IAB) nodes, router devices, or other network equipment), such as Figure 1 As shown in .

[0079] Each base station 105 can communicate with the core network 130, or with each other, or both. For example, a 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), indirectly (e.g., via the core network 130), or directly and indirectly on the backhaul links 120 (e.g., via X2, Xn, or other interfaces). In some examples, the backhaul links 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 backhaul links 160.

[0080] One or more of the base stations 105 described herein may include or may be referred to by one of ordinary skill in the art as a base transceiver station, a radio base station, an access point, a radio transceiver, a Node B, an evolved Node B (eNB), a next generation Node B, or a Gigabit Node B (any of which may be referred to as a gNB), a Home Node B, a Home Evolved Node B, or other suitable terminology.

[0081] UE 115 may include or be referred to as a mobile device, a wireless device, a remote device, a handheld device, or a subscriber device, or some other suitable terminology, where "device" may also be referred to as a unit, a station, a terminal, or a client, etc. UE 115 may also include or be referred to as a personal electronic device, such as a cellular phone, a personal digital assistant (PDA), a tablet computer, a laptop computer, or a personal computer. In some examples, UE 115 may include or be referred to as a wireless local loop (WLL) station, an Internet of Things (IoT) device, an Internet of Everything (IoE) device, or a machine type communication (MTC) device, etc., which may be implemented in various objects, such as appliances or vehicles, meters, etc.

[0082] The UE 115 described herein may be capable of communicating with various types of devices, such as other UEs 115, which may sometimes act as relays, routers, or CPE, 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. Figure 1 As shown in .

[0083] The UE 115 and the base station 105 may communicate wirelessly with each other via one or more communication links 125 on 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 the communication link 125. For example, a carrier for the communication link 125 may include a portion of a radio frequency spectrum band (e.g., a bandwidth portion (BWP)) 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 communication with the UE 115 using carrier aggregation or multi-carrier operation. The UE 115 may be configured with multiple downlink component carriers and one or more uplink component carriers according to a carrier aggregation configuration. Carrier aggregation may be used with both frequency division duplex (FDD) and time division duplex (TDD) component carriers.

[0084] The communication link 125 shown in the wireless communication system 100 may include an uplink transmission from the UE 115 to the base station 105, or a downlink transmission from the base station 105 to the UE 115. A carrier may carry downlink or uplink communications (e.g., in FDD mode) or may be configured to carry both downlink and uplink communications (e.g., in TDD mode).

[0085] A carrier may be associated with a particular bandwidth of radio frequency spectrum, and in some examples, the carrier bandwidth may be referred to as the "system bandwidth" of the carrier or 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 of 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 on a particular carrier bandwidth, or may be configurable to support communication on 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 on a portion (e.g., a subband, a BWP) or all of the carrier bandwidth.

[0086] The signal waveform transmitted on the carrier may include multiple subcarriers (e.g., using a multicarrier modulation (MCM) technique such as orthogonal frequency division multiplexing (OFDM) or discrete Fourier transform spread OFDM (DFT-S-OFDM)). In a system employing MCM techniques, a resource element may include one symbol period (e.g., the duration of one modulation symbol) and one subcarrier, where the symbol period and 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 communications with UE 115.

[0087] The time interval of the base station 105 or the UE 115 can be expressed as a multiple of a basic time unit, which 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).

[0088] 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 (e.g., in the time domain) into subframes, 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.

[0089] A subframe, slot, mini-slot, or symbol may be the smallest scheduling unit (e.g., in the time domain) of the wireless communication system 100 and may be referred to as a transmission time interval (TTI). In some examples, the TTI duration (e.g., the number of symbol periods in a TTI) may be variable. Additionally or alternatively, the smallest scheduling unit of the wireless communication system 100 may be dynamically selected (e.g., in bursts of shortened TTIs (sTTIs)).

[0090] Physical channels may be multiplexed on a carrier according to various techniques. Physical control channels and physical data channels may be multiplexed on a downlink carrier, for example, using one or more of time division multiplexing (TDM), frequency division multiplexing (FDM), or hybrid TDM-FDM techniques. A control region (e.g., a control resource set (CORESET)) for physical control channels may be defined by a number of symbol periods and may extend across the system bandwidth or a subset of the system bandwidth of a carrier. One or more control regions (e.g., CORESETs) may be configured for a set of UEs 115. For example, one or more of UEs 115 may monitor or search the control region for control information according to one or more search space sets, and each search space set may include one or more control channel candidates in one or more aggregation levels arranged in a cascaded manner. An aggregation level for a control channel candidate may refer to the number of control channel resources (e.g., control channel elements (CCEs)) associated with encoded information for a control information format having a given payload size. The search space sets may include a common search space set configured for transmitting control information to multiple UEs 115 and a UE-specific search space set for transmitting control information to a specific UE 115 .

[0091] In some examples, base stations 105 can be mobile and, therefore, provide communication coverage for mobile geographic coverage areas 110. In some examples, different geographic coverage areas 110 associated with different technologies can overlap, but the different geographic coverage areas 110 can be supported by the same base station 105. In other examples, overlapping geographic coverage areas 110 associated with different technologies can be supported by different base stations 105. The wireless communication system 100 can include, for example, a heterogeneous network in which different types of base stations 105 provide coverage for various geographic coverage areas 110 using the same or different radio access technologies.

[0092] Some UEs 115, such as MTC or IoT devices, may be low-cost or low-complexity devices and may provide automated communication between machines (e.g., via machine-to-machine (M2M) communication). M2M communication or MTC may refer to data communication technology that allows devices to communicate with each other or with a base station 105 without human intervention. In some examples, M2M communication or MTC may include communications from devices that incorporate sensors or meters to measure or capture information and relay such information to a central server or application that utilizes the information or presents it to a person interacting with the application. Some UEs 115 may 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 geographic event monitoring, queue management and tracking, remote security sensing, physical access control, and transaction-based commercial charging.

[0093] 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.

[0094] In some examples, UE 115 may also be able to communicate directly with other UEs 115 over a device-to-device (D2D) communication link 135 (e.g., using a peer-to-peer (P2P) or D2D protocol). One or more UEs 115 utilizing D2D communication may be within the geographic coverage area 110 of base station 105. Other UEs 115 in such a group may be outside the geographic coverage area 110 of base station 105 or otherwise unable to receive transmissions from base station 105. In some examples, groups of UEs 115 communicating via D2D communication may utilize a one-to-many (1:M) system, in which each UE 115 transmits to every other UE 115 in the group. In some examples, base station 105 facilitates the scheduling of resources for D2D communication. In other cases, D2D communication is performed between UEs 115 without involving base station 105.

[0095] 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, the vehicles can communicate using vehicle-to-everything (V2X) communication, vehicle-to-vehicle (V2V) communication, or some combination of these communications. The vehicles can signal information related to traffic conditions, signal scheduling, weather, safety, emergency situations, or any other information related to the V2X system. In some examples, the vehicles in the V2X system can use vehicle-to-network (V2N) communication to communicate with roadside infrastructure (such as roadside units), with the network, or with both via one or more network nodes (e.g., base station 105).

[0096] The core network 130 may provide user authentication, access authorization, tracking, Internet Protocol (IP) connectivity, and other access, routing, or mobility functions. The core network 130 may be an evolved packet core (EPC) or a 5G core (5GC), and the EPC or 5GC may 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 may manage non-access stratum (NAS) functions such as mobility, authentication, and bearer management for UEs 115 served by base stations 105 associated with the core network 130. User IP packets may be delivered through the user plane entity, which may provide IP address allocation and other functions. The user plane entity may be connected to the network operator IP service 150. Operator IP services 150 may include access to the Internet, an intranet, an IP Multimedia Subsystem (IMS), or packet-switched streaming services.

[0097] Some network devices (such as base stations 105) may include subcomponents, such as access network entities 140, which may be examples of access node controllers (ANCs). Each access network entity 140 may communicate with each UE 115 through one or more other access network transport entities 145, which may be referred to as radio heads, smart radio heads, or transmit / receive points (TRPs). Each access network transport entity 145 may include one or more antenna panels. In some configurations, the various functions of each access network entity 140 or base station 105 may be distributed across various network devices (e.g., radio heads and ANCs) or consolidated into a single network device (e.g., base station 105).

[0098] The wireless communication system 100 can operate using one or more frequency bands that can range from 300 megahertz (MHz) to 300 gigahertz (GHz). The 300 MHz to 3 GHz region can be referred to as the ultra-high frequency (UHF) region or the decimeter band because the wavelengths range from approximately 1 decimeter to 1 meter long. UHF waves can be blocked or redirected by buildings and environmental features, but these waves can penetrate various structures sufficiently for macrocells to provide service to UEs 115 located indoors. Transmissions using UHF waves can be associated with smaller antennas and a shorter range (e.g., less than 100 kilometers) than transmissions using the lower frequencies and longer wavelengths in the high frequency (HF) or very high frequency (VHF) portions of the spectrum below 300 MHz.

[0099] The wireless communication system 100 may also operate in the super high frequency (SHF) region of the frequency band from 3 GHz to 30 GHz (also known as the centimeter band) or in the extremely high frequency (EHF) region of the spectrum (e.g., from 30 GHz to 300 GHz) (also known as the millimeter band). In some examples, the wireless communication system 100 may support millimeter wave (mmW) communications between the UE 115 and the base station 105, and the EHF antennas of the corresponding devices may be smaller and more closely spaced than the UHF antennas. In some examples, this may facilitate the use of antenna arrays within the device. However, the propagation of EHF transmissions may be subject to even greater atmospheric attenuation and a shorter range than SHF or UHF transmissions. The techniques disclosed herein may be employed across transmissions using one or more different frequency regions, and the use of frequency bands specified across these frequency regions may vary by country or regulatory agency.

[0100] The electromagnetic spectrum is typically subdivided into various classes, bands, channels, etc. based on frequency / wavelength. In 5G NR, two initial operating 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, FR1 is often (interchangeably) referred to as the "sub-6 GHz band" in various documents and articles. A similar naming issue sometimes arises with respect to FR2, which is often (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 as the "millimeter wave" band by the International Telecommunication Union (ITU).

[0101] Frequencies between FR1 and FR2 are generally referred to as mid-band frequencies. Recent 5G NR research has identified the operating bands for these mid-band frequencies as frequency range designation FR3 (7.125 GHz–24.25 GHz). Frequency bands falling within FR3 can inherit FR1 characteristics and / or FR2 characteristics, and thus can effectively extend the features of FR1 and / or FR2 to mid-band frequencies. In addition, higher frequency bands are currently being explored to extend 5G NR operation to 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.

[0102] In view of the above aspects, unless otherwise specified, it should be understood that the terms "sub-6 GHz" and the like, if used herein, can broadly refer to frequencies that may be less than 6 GHz, may be within FR1, or may include mid-band frequencies. Furthermore, unless otherwise specified, it should be understood that the terms "millimeter wave" and the like, if used herein, can broadly refer to frequencies that may include mid-band frequencies, may be within FR2, FR4, FR4-a or FR4-1 and / or FR5, or may be within the EHF band.

[0103] The wireless communication system 100 may utilize both licensed and unlicensed radio frequency spectrum bands. For example, the wireless communication system 100 may 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 spectrum band, devices (such as base stations 105 and UEs 115) may employ carrier sensing for conflict detection and avoidance. In some examples, operations in the unlicensed band may be based on a carrier aggregation configuration (e.g., LAA) in coordination with component carriers operating in the licensed band. Operations in the unlicensed spectrum may include downlink transmissions, uplink transmissions, P2P transmissions, or D2D transmissions, among others. The carrier aggregation configuration may be associated with a first component carrier and a second component carrier.

[0104] The base station 105 or UE 115 may be equipped with multiple antennas that can be used to employ techniques such as transmit diversity, receive diversity, multiple-input multiple-output (MIMO) communications, or beamforming. The antennas of the base station 105 or UE 115 may be located within one or more antenna arrays or antenna panels that can support MIMO operations or transmit or receive beamforming. For example, one or more base station antennas or antenna arrays may be co-located at an antenna assembly (such as an antenna tower). In some examples, the antennas or antenna arrays associated with the base station 105 may be located at different geographical locations. The base station 105 may have an antenna array having several rows and columns of antenna ports that the base station 105 can use to support beamforming for communications with the UE 115. Similarly, the 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.

[0105] The base station 105 or the UE 115 can use MIMO communication to exploit multipath signal propagation and improve spectral efficiency by transmitting or receiving multiple signals via different spatial layers. Such a technique may be referred to as spatial multiplexing. For example, a transmitting device may transmit multiple signals via different antennas or different antenna combinations. Similarly, a receiving device may receive multiple signals via different antennas or different antenna combinations. 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), in which multiple spatial layers are transmitted to the same receiving device, and multi-user MIMO (MU-MIMO), in which multiple spatial layers are transmitted to multiple devices.

[0106] 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 steer an antenna beam (e.g., a transmit beam, a receive beam) along a spatial path between the transmitting device and the receiving device. Beamforming can be achieved by combining signals communicated via antenna elements of an antenna array so that some signals propagating at a particular orientation relative to the antenna array experience constructive interference, while other signals experience destructive interference. Adjustments to signals communicated via antenna elements can 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 that device. The adjustments associated with each antenna element can 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).

[0107] The base station 105 or the UE 115 may use beam sweeping techniques as part of a beamforming operation. For example, the base station 105 may use multiple antennas or antenna arrays (e.g., antenna panels) to perform beamforming operations for directional communication with the UE 115. Some signals (e.g., synchronization signals, reference signals, beam selection signals, or other control signals) may be transmitted multiple times by the base station 105 in different directions. For example, the base station 105 may transmit signals according to different sets of beamforming weights associated with different transmission directions. The transmissions in different beam directions may be used (e.g., by a transmitting device (such as the base station 105) or a receiving device (such as the UE 115)) to identify a beam direction for later transmission or reception by the base station 105.

[0108] Some signals, such as data signals associated with a particular recipient device, may be transmitted by base station 105 in a single beam direction, e.g., a direction associated with a recipient device, such as UE 115. In some examples, a beam direction associated with transmissions along 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.

[0109] In some examples, transmission by a device (e.g., by a base station 105 or a UE 115) may be performed using multiple beam directions, and the device may use a combination of digital precoding or radio frequency beamforming to generate a combined beam for transmission (e.g., from the base station 105 to the UE 115). The 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. The base station 105 may transmit reference signals that may be precoded or unprecoded (e.g., a cell-specific reference signal (CRS), a channel state information (CSI) reference signal (CSI-RS)). The UE 115 may provide feedback for beam selection, which may be a precoding matrix indicator (PMI) or codebook-based feedback (e.g., a multi-panel type codebook, a linear combination type codebook, a port selection type codebook). Although these techniques are described with reference to signals transmitted by base station 105 in one or more directions, UE 115 may use similar techniques to transmit signals multiple times in different directions (e.g., to identify a beam direction for subsequent transmission or reception by UE 115) or to transmit signals in a single direction (e.g., to transmit data to a receiving device).

[0110] 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 base station 105. For example, the receiving device may attempt multiple receive directions by receiving via different antenna subarrays, processing received signals according to different antenna subarrays, receiving according to different receive beamforming weight sets applied to signals received at multiple antenna elements of an antenna array (e.g., different directional listening weight sets), 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 data signals). The single receive configuration may be aligned on 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).

[0111] The UE 115 may include one or more antenna modules that may include a relatively large number of antenna elements for mmW communication, and the UE 115 may be an example of the first wireless device discussed herein. The 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 frequency band and a second mmW frequency band. The UE communication manager 101 may determine a beam correlation parameter based on the carrier aggregation configuration received from the second wireless device. The UE communication manager 101 may determine a first beam in the first mmW frequency band and a second beam in the second mmW frequency band, and may use the first beam and the second beam to communicate with the second wireless device (such as the base station 105).

[0112] One or more base stations 105 may be examples of the second wireless device discussed herein and may include a base station communication manager 102. The base station communication manager 102 may transmit a carrier aggregation configuration to the UE 115 and may determine a beam correlation parameter based on an inter-band carrier aggregation parameter. The base station communication manager 102 may communicate with the UE 115 in an inter-band carrier aggregation mode using a first beam on a first mmW frequency band and a second beam on a second mmW frequency band, wherein the first beam and the second beam are based on the beam correlation parameter.

[0113] Figure 2An example of a wireless communication device 200 with multiple antenna arrays that supports signaling of beam correlation across millimeter wave frequency bands in accordance with aspects of the present disclosure is illustrated. In some examples, the wireless communication device 200 with multiple antenna arrays can implement aspects of the wireless communication system 100. In this example, the wireless communication device can be a UE 115-a, although in other cases, the wireless communication device can be a different device, such as a CPE, a relay device, a router, a repeater, or an IAB node.

[0114] In this example, 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 antenna modules 205-215 may include several subarrays 220 of antenna elements. In this example, first antenna module 205 may include four subarrays 220, including a first subarray 220-a, a second subarray 220-b, a third subarray 220-c, and a fourth subarray 220-d. In this example, each subarray 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-band mmW deployment. In some cases, the spacing of antenna elements 225 within each subarray 220 may be configured to provide efficient analog beamforming at wavelengths associated with high-band mmW communication (e.g., in FR4). Furthermore, in this example, each sub-array 220 may include an associated radio frequency integrated circuit (RFIC) 230 .

[0115] exist Figure 2 In the example of FIG. 2 , the second antenna module 210 may also include multiple subarrays 235, including a fifth subarray 235-a and a sixth subarray 235-b. In this example, the fifth subarray 235-a includes eight antenna elements arranged in a 4x2 array configuration, while the sixth subarray 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 subarrays 235, but multiple RFICs may be used, or the RFIC may be shared with one or more other antenna modules 205 or 215. While the antenna module 210 is illustrated as having multiple subarrays 235 of different sizes, other examples may have the same number of subarrays 235, each of the same size (e.g., four 4x4 antenna subarrays similar to those illustrated for the first antenna module 205). The techniques discussed herein may be applied to any number of antenna modules 205 to 215, any number of subarrays included in each antenna module, any number of antennas per subarray, or any combination thereof.

[0116] As discussed herein, a wireless device may use multiple RFICs 230 and associated antenna subarrays 220 at different times. Figure 2 In a scenario where the wireless device is a UE 115-a, it may be desirable to operate using only a subset of the antenna modules 205-215, using only a subset of the antenna subarrays 220 and associated RFICs 230, using only a subset of the antenna elements 225 within one or more subarrays 220, or any combination thereof. Such operations may allow the UE 115-a to manage power consumption to reduce, for example, the power used by RF components. In other scenarios, in addition to or in lieu of power consumption considerations, the UE 115-a may also determine that one or more MPE constraints, one or more thermal constraints, or a combination thereof, are such that it is desirable to use only certain groups of antenna elements 225 of one or more subarrays 220. Thus, even if a relatively large number of antenna elements 225 are available at the UE 115-a, not all of them may be used at any particular moment. For example, the UE 115-a may have a total of N antenna elements 225 across each of the different antenna modules 205-215, and may select K antenna elements 225 for communication, resulting in N C K There are many possibilities, which can result in a relatively large number of combinations of different antenna elements 225. Thus, in some cases, UE 115-a can select a relatively small list of antenna groups that can be used at a given time (e.g., based on power consumption, MPE considerations, thermal considerations, etc.). UE 115-a can provide an indication of the selected antenna group 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 the one or more antenna groups. Communication can then be established using one of the indicated antenna groups based on the one or more transmission parameters and the number of antenna elements in the antenna group. Reference Figure 3 and Figure 4 Various examples of transmission control parameter indications for one or more antenna groups and procedures based on such indications are discussed.

[0117] Figure 3 An example of a wireless communication system 300 that supports signaling of beam correlation across millimeter wave frequency bands according to aspects of the present disclosure is illustrated. In some examples, the wireless communication system 300 can implement aspects of the wireless communication system 100. In some examples, the wireless communication system 300 can include a UE 115-b and a base station 105-a, which can be referenced Figure 1-21 and 105. The examples of UE 115 and base station 105 are described. Furthermore, 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 communications, wherein UE 115-b transmits uplink communications 305 to base station 105-a, and base station 105-a transmits downlink communications 310 to UE 115-b.

[0118] In some cases, a 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 those described in reference to FIG. Figure 2 As discussed. UE 115-b may transmit antenna selection information 315 to base station 105-a, the antenna selection information 315 indicating one or more different antenna groups that have been selected at UE 115-b and preferred for establishing a transmit beam for mmW communication, and one or more transmission control parameters associated with the one or more antenna groups. The one or more transmission control parameters may be based at least in part 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 of the antenna group, one or more properties of the transmission, or a combination thereof. For example, MCS-dependent phase noise compensation may be mapped to a specific configured MCS and number of antenna elements for the transmission. In cases where such mapping can be implemented, the mapping may be preconfigured or provided to UE 115-b when configuring connection establishment or re-establishment.

[0119] In some cases, the base station 105-a may initiate one or more procedures based on the antenna selection information 315, such as a beam training procedure based on the indicated antenna group, wherein different base station beams 325 and different UE beams 330 may be tested and measured to identify a preferred beam for communication. For example, the UE 115-b may use multiple UE beams 330 to measure reference signals of multiple base station beams 325 and select a preferred beam, and provide feedback to the base station 105-a on the selected beam, such as through a selected TCI state. In some cases, the UE 115-b may transmit a CSI measurement report to the base station 105-a based on the measurements of the beam training procedure. In addition, 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 associated antenna element group, which may then be used by base station 105-a to allocate resources to UE 115-b, schedule communications for UE 115-b, set a digital beamforming codebook, set one or more power control parameters, or any combination thereof.

[0120] In some cases, the transmission control parameters may include, for example, an array size of one or more antenna element groups (which may also be referred to as sets), an array geometry of one or more antenna element sets, a beam pattern of one or more antenna element sets, or any combination thereof. Using different antenna element sets, the digital beamforming codebook used for communication between the UE 115-b and the base station 105-a may be configured to be specific to the particular antenna group used for communication and may be indicated in a digital beamforming configuration 320 provided by the base station 105-a. In some examples, the digital beamforming configuration 320 may be provided in downlink control information (DCI) with resource grants provided to the UE 115-b for uplink or downlink communication. Additionally, for controlling power, due to effective isotropically radiated power (EIRP) limitations that may apply at the UE 115-b, the maximum transmittable power (e.g., P) at the UE 115-b may be limited to a maximum transmittable power (e.g., P) of the UE 115-b. cmax ) may depend on the group of antenna elements used in the communication, and different array sizes may result in different array gains and thus affect P cmax In addition, the 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 cmax , array information, or a combination thereof, which can be used to determine an MCS, a 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, the base station 105-a can use the indication of the antenna group to facilitate scheduling based on data rate and antenna gain of one or more antenna element groups for communication.

[0121] In some cases, the 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 parameters 335) across TCI states in different mmW bands to allow the UE 115-a to determine correlation (e.g., beam correlation parameters) in directions with co-directional beams in two mmW bands using inter-band carrier aggregation. For example, the UE 115-b may send a beam training signal (e.g., a sounding reference signal (SRS)) on a lower carrier frequency (e.g., 28 GHz). The base station 105-a may process the beam training signal at 28 GHz on a first radio frequency (RF) chain and the beam training signal at 60 GHz on a second RF chain. The base station 105-a may determine the carrier aggregation configuration parameters 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 carrier aggregation configuration parameters 335 to the UE 115 - b to determine beams for communication at a lower carrier frequency and a higher carrier frequency (eg, 60 GHz) based on a beam training procedure.

[0122] 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 UE 115-b. In some cases, the configuration may be a wireless device-specific message for UE 115-b. In a second example, the configuration message may be specific to the bandwidth portion of the lower mmW band and the upper mmW band. In a third example, the configuration message may be specific to the TCI state used by base station 105-a in the upper mmW band and the lower mmW band. In a fourth example, the configuration message may include a weighted average metric for a group of TCI states used by base station 105-a in the upper mmW band and the lower mmW band. UE 115-b may determine a weight for use with the weighted average metric and the TCI of the beam used in determining the weighted average. In some cases, the configuration message may be a combination of the first to fourth examples.

[0123] In some examples, UE 115-b may perform inter-band carrier aggregation across two frequency bands. UE 115-b may determine beam correlation parameters based on carrier aggregation configuration parameters 335. In some cases, UE 115-b may determine, based on the beam correlation parameters, a first beam on a lower mmW frequency band and a second beam on a higher mmW frequency band for communication with base station 105-a (e.g., simultaneous communication across the two frequency bands).

[0124] Figure 4An example of a wireless communication system 400 that supports signaling of beam correlation across millimeter wave frequency bands according to aspects of the present disclosure is illustrated. 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. The following alternative examples may be implemented in which 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.

[0125] 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 depending on the configuration type. For example, when the reference signal described is associated with a downlink transmission, the first device 405 may be a base station 105 and the second device 410 may be a UE 115. When the reference signal is associated with an uplink transmission, the first device 405 may be a UE 115 and the second device may be a base station 105. When the reference signal is associated with a sidelink, D4D, or M4M transmission, the first device 405 may be a first UE 115 and the second device may be a second UE. When the reference signal is associated with an IAB transmission, the first device 405 may be a first base station 105 and the second device may be a 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 can perform techniques for beam coherence estimation according to the examples disclosed herein. In some examples, first device 405, second device 410, or both may be referred to as millimeter wave devices.

[0126] The wireless communication system 400 can be configured to communicate according to various frequency bands, which can include licensed frequency bands or unlicensed or shared frequency bands. In one example, a frequency band can refer to a frequency range (FR), which can include a set of frequency channels (e.g., an ARFCN set), and such frequency ranges can be non-overlapping in the frequency domain. For example, the wireless communication system 400 can support communications 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.

[0127] 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 having different RF chains for different frequency bands, but 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, 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 location or proximity detection, and such a radar system may additionally be used to perform communications in a radar band (e.g., an 80 GHz band), where such communications may include an inter-band carrier configuration comprising the radar band and another band. While 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 to, calibrated for, or configured to correspond 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.

[0128] 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 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) may be supported. For example, the signal 420 may represent a transmission using carrier aggregation (which may be inter-band carrier aggregation). Additionally, Figure 4 Any of the signals shown in may be transmitted using carrier aggregation.

[0129] In some examples, the carriers or channels of Band 1 and Band 4 may refer to different frequency ranges (e.g., FR1, FR4, or different frequency ranges within FR4). In one illustrative example, communications on Band 1 may be associated with a carrier or channel in FR1 (e.g., the 4.9 GHz band), while communications on Band 4 may be associated with a carrier or channel in FR4 (e.g., the 48 GHz band). In another example, communications on Band 1 may be associated with a carrier or channel in FR4 (e.g., the 48 GHz band), while communications on Band 4 may be associated with a carrier or channel in FR4 (e.g., the 39 GHz band, the 60 GHz band).

[0130] 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 one illustrative example, communications on Band 1 may be associated with a first carrier or channel in FR4 (e.g., the 48 GHz band), while communications on Band 4 may be associated with a second carrier or channel in FR4 (e.g., the 39 GHz band). In another example, communications on Band 1 may be associated with a first carrier or channel in FR4 (e.g., the 60 GHz band), while communications on Band 4 may be associated with a second carrier or channel in FR4 (e.g., the 66 GHz band). Although an example of inter-band carrier aggregation on two frequency bands is provided, the described techniques may be applied to any number of frequency bands used in a carrier aggregation configuration, whether in the same frequency range or in two or more different frequency ranges.

[0131] In some examples of inter-band carrier aggregation, multiple RF chains can be used to direct energy in the same direction or cluster across frequency bands. For example, inter-band carrier aggregation including the 48 GHz band and the 39 GHz band can include using different RF chains for each band, where such coexistence can include various power or thermal considerations. In some examples, inter-band carrier aggregation can be improved by having well-correlated beams (e.g., directionally similar receive directions for different frequency bands from the perspective of the second device 410), and the first device 405 and the second device 410 can support quantification or other evaluation of the correlation between the beams used in the two frequency bands.

[0132] In one example, inter-band carrier aggregation can include a first carrier or channel in the 48 GHz band and a second carrier or channel in the 39 GHz band, and the relatively narrow beam at 39 GHz can be aligned in a different direction (e.g., at the second device 410) than the relatively wide beam at 48 GHz. In some examples, such beam alignment can involve an antenna or RF cluster of the second device 410 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). Furthermore, the power angular delay profile (PADP) can 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, obstructions, polarization-dependent loss, and the like, which can be specific to certain frequency bands or sub-bands. Thus, for these and other reasons, transmissions in different frequency bands can be associated with directions of peak received power (e.g., at the second device 410) that are aligned in different directions.

[0133] 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 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).

[0134] 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, communications 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) so that the resource blocks or other allocated intervals of the first frequency band and the second frequency band are aligned in the time domain (e.g., from the perspective of the first device 405 or the second device 410, have the same start time, have the same end time, and span the same duration in time). 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., the first reference signal 415-a and the second reference signal 415-b are transmitted 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 at another simultaneous duration or during respective durations that are otherwise overlapping in time.

[0135] The first reference signal 415-a may be transmitted by the first device 405-a using a first transmit beam 406-a or otherwise directionally transmitted using a first transmit codebook (e.g., an analog or digital codebook associated with a 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 directionally transmitted using a second transmit codebook (e.g., another analog or digital codebook associated with a second transmission direction). Although it may be beneficial for inter-band carrier aggregation for the second device 410 to receive the first reference signal 415-a and the second reference signal 415-b in the same or similar directions (e.g., receive directions), the first reference signal 415-a and the second reference signal 415-b may be transmitted in the same direction or in 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.

[0136] In various examples, the respective directions for transmitting the first reference signal 415-a and the second reference signal 415-b can be based at least in part on the alignment of different antenna arrays associated with different frequency bands, the directional transmission resolution or granularity associated with transmitting on different frequency bands, or other hardware having processing configurations or capabilities associated with different frequency bands. In some examples, the first device 405 can be aware of signal propagation differences between the first frequency band and the second frequency band (e.g., based at least in part on beam or codebook training operations between the first device 405 and the second device 410), such as reflective surfaces 430 or other signal propagation distortions or attenuations that are relevant to the transmission of the first reference signal 415-a but not relevant to the transmission of the second reference signal 415-b. Thus, in some examples, the first device 405 can individually determine or adjust the transmission direction of one or both of the first reference signal 415-a or the second reference signal 415-b accordingly (e.g., to support the reception direction at the second device 410 to be relatively well aligned or otherwise correlated).

[0137] The type of reference signal employed by the wireless communication system 400 to support the described techniques may be based at least in part on the device type of the first device 405 or the second device 410, 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 when 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 may be CSI-RS transmissions performed by the first device 405 on the first and second frequency bands. In another example, when the first device 405 is a UE 115, or when 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 may be SRS transmissions performed by the first device 405 on the first and second frequency bands.

[0138] The hardware configuration used by the first device 405 to transmit the reference signals 415-a and 415-b can be based at least in part on the device type of the first device 405, the hardware capabilities of the first device 405, or both. For example, the first device 405 can be a UE 115 having a single RF chain, and the first reference signal 415-a and the second reference signal 415-b can be transmitted using the same single RF chain on a first frequency band and a second frequency band, respectively. 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 having multiple RF chains, and the first reference signal 415-a and the second reference signal 415-b can be transmitted using the same RF chain or different RF chains on a first frequency band and a second frequency band, respectively. In other examples, the first device 405 may be a base station 105 having multiple RF chains, and the first reference signal 415-a and the second reference signal 415-b may be transmitted using the same RF chain or different RF chains over the first frequency band and the second frequency band, respectively. 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 may 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.

[0139] A first reference signal 415-a may be received by a second device 410 using a first receive beam 411-a or otherwise directionally received using a first receive codebook (e.g., an analog or digital codebook associated with a first receive direction), and a second reference signal 415-b may be received by a second device 410 using a second receive beam 411-b or otherwise directionally received using a second receive codebook (e.g., another analog or digital codebook associated with a second receive direction). Reception of the first reference signal 415-a and the second reference signal 415-b may be evaluated at the second device 410, which may include evaluating how the beam or direction of highest received power correlates between the first reference signal 415-a and the second reference signal 415-b. For example, second device 410 may receive first reference signal 415-a, and as part of this reception, second device 410 may determine (e.g., explicitly or implicitly) a direction (e.g., a direction of receive beam 411-a) or a codebook associated with a highest received power of first reference signal 415-a. Similarly, second device 410 may receive second reference signal 415-b, and as part of this reception, second device 410 may determine (e.g., explicitly or implicitly) a direction (e.g., a direction of receive beam 411-b) or a codebook associated with a highest received power of second reference signal 415-b.

[0140] First reference signal 415-a and second reference signal 415-b may be received concurrently, simultaneously, or according to another degree of overlapping time interval. For example, when first reference signal 415-a and second reference signal 415-b are transmitted simultaneously, first reference signal 415-a and second reference signal 415-b may be received simultaneously (e.g., when the signal propagation delay between first device 405 and second device 410 is the same for the first frequency band and the second frequency band). In other examples, when first reference signal 415-a and second reference signal 415-b are transmitted simultaneously, first reference signal 415-a and second reference signal 415-b may not be received simultaneously (e.g., when the signal propagation delay between first device 405 and 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, a relative delay between receiving the first reference signal 415-a and the second reference signal 415-b may be determined and taken into account (e.g., applied to signal processing of the first reference signal 415-a and the second reference signal 415-b or evaluation between the first reference signal 415-a and the second reference signal 415-b at the second device 410). In other examples, a relative signal propagation delay between the first frequency band and the second frequency band may be determined and taken into account (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 in an effort to synchronize their reception (e.g., at the second device 410).

[0141] 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 may be based at least in part 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 transmit beam and receive beam refinement between the first device 405 and the second device 410.

[0142] 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 a base station 105 or TRP, the P-1 operation may include intra-TRP or inter-TRP transmit beam sweeping from a set of different beams (e.g., transmit beams). For beamforming at a UE 115, the P-1 operation may include UE receive beam sweeping from a set of different beams (e.g., receive beams).

[0143] In P-2 signaling, the first device 405 can transmit using a set of relatively narrow transmit beams, and the second device 410 can measure the corresponding signal strength 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 can be used to enable UE measurements of different transmit beams to potentially change the transmit beam (e.g., inter-TRP or intra-TRP transmit beam). In some cases, such selection can be made from a smaller set of beams than in P-1 for beam refinement. In some examples, P-2 operation can be considered a special case of P-1 operation.

[0144] In P-3 signaling, first device 405 may transmit using a relatively narrow transmit beam (e.g., as selected or indicated by second device 410), and second device 410 may measure the respective signal strength of each receive beam in a set of relatively narrow receive beams, which may or may not be signaled or indicated back to first device 405. In some examples, P-3 signaling may be used to enable UE measurements on the same transmit beam to change the receive beam at UE 115 in situations where UE 115 uses beamforming.

[0145] 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 operations of the 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 the P-1 or P-2 operations, the second device 410 (e.g., UE 115) can determine a receive directivity associated with the first reference signal 415-a (e.g., the direction of the first receive beam 411-a) and a 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 is contemplated that the second device 410 (e.g., UE 115) has multiple RF chains, which the second device 410 can use to process the first reference signal 415-a and the second reference signal 415-b (e.g., to separately determine the respective receive directions) and estimate or otherwise evaluate a beam correlation metric. If the second device 410 (e.g., UE 115) has only a single RF chain, a different procedure can be employed (e.g., based on U-1 or U-4 signaling or operation). In some cases, the beam correlation metric can be based on receiving the first reference signal on the first beam and receiving the second reference signal on the second beam.

[0146] 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 U-1, U-4, or U-3 signaling or operation sequence that supports transmit beam and receive beam refinement 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 similar to the P-1, P-2, and P-3 signaling or operations, respectively, but with an opposite perspective (e.g., in the uplink direction instead of the downlink direction).

[0147] 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 operations of the 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 the U-1 or U-4 operations, the second device 410 (e.g., the base station 105) can determine a receive directivity associated with the first reference signal 415-a (e.g., the direction of the first receive beam 411-a) and a 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 is contemplated that the second device 410 (e.g., base station 105) may have multiple RF chains, which the second device 410 may use to process the first reference signal 415-a and the second reference signal 415-b (e.g., to separately determine the respective receive directions) and estimate or otherwise evaluate a 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 using U-1 or U-4 signaling or operations may still be applicable at the second device 410 (e.g., base station 105) having multiple RF chains.

[0148] In some examples, the type of procedure used by second device 410 to evaluate the directionality of reception of first reference signal 415-a or second reference signal 415-b may be based at least in part on hardware capabilities or configurations of second device 410. In various examples, the type of procedure used by second device 410 to determine directionality for reception on the first and second frequency bands (e.g., for first reference signal 415-a and second reference signal 415-b) may be the same, or the type of procedure used by second device 410 to determine directionality for reception on the first and second frequency bands (e.g., for first reference signal 415-a and second reference signal 415-b) may be different, which may be related to hardware capabilities or configurations supported in the respective frequency bands.

[0149] In one example, the second device 410 may be configured to support digital beamforming for the respective frequency bands, which may support aspects of performing directional (e.g., continuous) receive sweeps. For example, for one or both of the first or second frequency bands, the second device may sweep different beam weights to determine a spectrum 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 respective reference signal 415 based at least in part on the respective spectrum. Thus, in some examples, the second device 410 may support digital beamforming capabilities that allow 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 direct comparison between the determined peak received power angles.

[0150] In another example, the second device 410 may additionally or alternatively be configured to support analog or hybrid beamforming for the corresponding frequency band, which may support various aspects of performing receive codebook sweeps. 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 receive power associated with each different analog receive codebook (e.g., associated with receiving the first reference signal 415-a or receiving the second reference signal). The codebook with the highest received power for the corresponding reference signal may thereby be determined as corresponding to the directionality of receiving the corresponding reference signal. In some examples, the second device 410 may sweep different codebooks of beams to identify preferred codebook entries using RSRP, SINR, or a combination thereof as a metric for determining a preferred codebook. Thus, in some examples, the second device 410 may support analog or hybrid beamforming capabilities that use beam scanning on the analog or hybrid beamforming codebook.

[0151] Although described in the context of analog receive beamforming, the second device 410 can perform a similar determination by sweeping a digital receive codebook. In some examples, each codebook can be implicitly or explicitly associated with a corresponding receive direction, which can be used to evaluate the correlation between the receive codebooks associated with the peak receive power of the first reference signal 415-a and the second reference signal 415-b. For example, f 低 and f 高The preferred learning beams or codebooks for the two frequency bands may be indicated at the second device 410. Such techniques may 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, and using the 39 GHz band and the 39 GHz band).

[0152] In some examples, digital beamforming may be associated with relatively higher cost, complexity, power consumption, or thermal considerations (e.g., related to a relatively high number of RF chains), particularly at relatively high frequencies. Thus, in some examples of the second device 410, digital beamforming may be supported at relatively low frequencies (e.g., a relatively low frequency band, Band 1), and analog beamforming may be supported at relatively high frequencies (e.g., a relatively high frequency band, Band 4). In such examples, corresponding directivity metrics may be normalized between the digital beamforming technique and the analog beamforming technique to support evaluation of receive 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 a digital beamforming capability at the second device 410 that is used to determine the direction of the peak received power of the first reference signal 415-a (e.g., using a relatively lower frequency band, Band 1) and an analog beamforming capability at the second device 410 that is used to determine the direction of the peak received power of the second reference signal 415-b (e.g., using a relatively higher frequency band, Band 4).

[0153] The assessment of beam correlation can be determined (e.g., explicitly or implicitly) based on a 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 at which the first reference signal 415-a is received 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 spectrum, as the angle corresponding to the codebook associated with the highest received power), and the azimuth direction at which the second reference signal 415-b is received 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 ).

[0154] In some examples, the elevation angle (eg, from the perspective of the second device 410) may be considered, where the elevation direction at which the first reference signal 415-a is received may be determined as And the elevation direction of receiving the second reference signal 415-b can be determined as In some examples, both azimuth and elevation are considered (e.g., where and represents the azimuth and elevation angle pairs toward which these beams steer peak energy), the beam correlation metric can be determined as In other words, if and If the beams are relatively close, a relatively large beam correlation can be determined, and if and The further away, the lower the beam correlation can be determined.

[0155] 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 beam correlation at the second device 410. For example, when the determined beam correlation metric satisfies a threshold (e.g., is at or above a threshold correlation, indicating a sufficient degree of correlation), the spectral efficiency of applying inter-band carrier aggregation in the first frequency band and the second frequency band can be favorable, and the first device 405 and the second device can proceed with inter-band carrier aggregation using the first frequency band and the second frequency band. 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 frequency band and the second frequency band). In some examples, the determination to proceed (e.g., a comparison to a threshold) can be performed at the first device 405 based on a beam correlation metric communicated from the second device 410 and signaled to the second device 410 (e.g., as an explicit indication by the first device 405 of inter-band carrier aggregation, as an implicit indication related to simultaneous scheduling by the first device 405 in the first frequency band and the second frequency band).

[0156] When the determined beam correlation metric does not satisfy a threshold (e.g., is at or below a threshold correlation, indicating an insufficient degree of correlation), the first device 405 and the second device 410 may refrain from performing inter-band carrier aggregation using the first frequency band and the second frequency band. For example, when the beam correlation metric does not satisfy the threshold, communications using different frequency bands may involve unbalanced power, unbalanced modulation and coding schemes, or other asymmetries between the frequency bands, which may degrade spectral efficiency. In some examples, determining to refrain from performing inter-band carrier aggregation using the first frequency band and the second frequency band may 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 signal propagation conditions change or improve).

[0157] 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 reevaluate reception at different directions in an effort to balance reception using the first frequency band and the second frequency band. For example, the described techniques can include the second device 410 determining suboptimal reception directions for one or both of the first frequency band or the second frequency band, where the suboptimal reception directions can be relatively well aligned with each other (e.g., better correlated than the peak reception directions). In some examples, despite receiving signaling at less than optimal signal quality, such a tradeoff can support improved spectrum utilization by more efficiently utilizing inter-band carrier aggregation.

[0158] Figure 5 An example of a process flow 500 for signaling supporting beam correlation across millimeter wave frequency bands according to 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. The following alternative examples can be implemented in which 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.

[0159] At 515, the second wireless device 510 may transmit a carrier aggregation configuration for communication with the first wireless device 505 to the first wireless device 505, the carrier aggregation configuration including at least the first frequency band and the second frequency band. In a first example, the first wireless device 505 may receive a configuration message from the second wireless device 510 as a broadcast message to one or more wireless devices including at least the first wireless device 505, as a wireless device-specific message to the first wireless device 505, or both. In a second example, the first wireless device 505 may receive a configuration message from the second wireless device 510 that is specific to bandwidth portions of the first and second frequency bands. In a third example, the first wireless device 505 may receive a configuration message from the second wireless device 510 that is specific to the TCI state used by the second wireless device 510 in the first and second millimeter-wave frequency bands. In a fourth example, the first wireless device 505 may receive a configuration message from the second wireless device 510 that is a weighted average metric of two or more transmission configurations indicating states used by the second wireless device 510 in the second and second millimeter-wave frequency bands. The first wireless device may determine a weight for use with the weighted average metric and a TCI of the second beam for use in determining the weighted average.

[0160] At 520 , the second wireless device 510 may determine a beam correlation parameter based on the carrier aggregation configuration. At 525 , the first wireless device 505 may determine a beam correlation parameter based on the carrier aggregation configuration received from the second wireless device 510 .

[0161] At 530 , the first wireless device 505 may determine a first beam or a second beam for use in communicating with the second wireless device 510 on the first frequency band or the second frequency band based on the beam correlation parameter.

[0162] At 535, the first wireless device 505 and the second wireless device 510 can communicate 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. 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.

[0163] Figure 6 A block diagram 600 of a device 605 supporting signaling of beam correlation across millimeter wave frequency bands according to aspects of the present disclosure is shown. The device 605 can be an example of aspects of the UE 115 as described herein. The device 605 can include a receiver 610, a communication manager 615, and a transmitter 620. The device 605 can also include a processor. Each of these components can be in communication with each other (e.g., via one or more buses).

[0164] 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 of 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 a reference Figure 9 Examples of aspects of the transceiver 920 are described. The receiver 610 may utilize a single antenna or a collection of antennas.

[0165] The communication manager 615 may receive, from the 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; determine a beam correlation parameter 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 parameter; determine a second beam for use in communicating with the second wireless device on the second frequency band based on the beam correlation parameter; 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. The communication manager 615 may be an example of aspects of the communication manager 910 described herein.

[0166] The communication manager 615 may perform various aspects of signaling beam correlation as described herein. The communication manager 615 or its subcomponents 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.

[0167] In another implementation, the communication manager 615 or its subcomponents 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 functionality of the communication manager 615 or its subcomponents may be performed by a general-purpose processor, DSP, ASIC, FPGA, or other programmable logic device.

[0168] In some examples, communication manager 615 may be configured to perform various operations (eg, receive, determine, transmit, configure) using or otherwise coordinating with receiver 610, transmitter 620, or both.

[0169] The communication manager 615 or its subcomponents can be physically located at various locations, including being distributed such that portions of functionality are implemented by one or more physical components at different physical locations. In some examples, according to various aspects of the present disclosure, the communication manager 615 or its subcomponents can be separate and distinct components. In some examples, according to various aspects of the present disclosure, the communication manager 615 or its subcomponents can be combined with one or more other hardware components, including but not limited to input / output (I / O) components, a transceiver, a network server, another computing device, one or more other components described in the present disclosure, or a combination thereof.

[0170] 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 a reference Figure 9 Examples of aspects of the described transceiver 920. The transmitter 620 may utilize a single antenna or a collection of antennas.

[0171] In some examples, the UE communications manager 615 may be implemented as an integrated circuit or chipset for a mobile device modem, and the receiver 610 and 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.

[0172] The UE communication manager 615 as described herein 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 communications.

[0173] Based on the techniques described herein for signaling beam correlation across millimeter wave bands, the processor of the UE 115 (e.g., a controller controlling the receiver 610, the transmitter 620, or a controller as described in reference to FIG. Figure 9 The described transceiver 920) can increase reliability and reduce signaling overhead in communications because the UE 115 can perform inter-band carrier aggregation across two or more frequency bands.

[0174] Figure 7 A block diagram 700 of a device 705 that supports signaling of beam correlation across millimeter wave frequency bands according to aspects of the present disclosure is shown. The device 705 can be an example of aspects of the device 605 or UE 115 as 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).

[0175] 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 a reference Figure 9 Examples of aspects of the transceiver 920 are described. The receiver 710 may utilize a single antenna or a collection of antennas.

[0176] The communication manager 715 can be an example of aspects of the communication manager 615 as described herein. The communication manager 715 can include a carrier aggregation configuration receiver 720, a beam correlation determining component 725, a beam determining component 730, and a carrier aggregation mode communicating component 735. The communication manager 715 can be an example of aspects of the communication manager 910 as described herein.

[0177] 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.

[0178] Beam correlation determining component 725 can determine beam correlation parameters based on the carrier aggregation configuration received from the second wireless device.

[0179] Beam determination component 730 can determine a first beam for use in communicating with a second wireless device on a first frequency band based on the beam correlation parameters, and determine a second beam for use in communicating with a second wireless device on a second frequency band based on the beam correlation parameters.

[0180] The carrier aggregation mode communicating component 735 can communicate with the second 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.

[0181] 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 a reference Figure 9 Examples of aspects of the described transceiver 920. The transmitter 740 may utilize a single antenna or a collection of antennas.

[0182] In some examples, the UE communications manager 715 may be implemented as an integrated circuit or chipset for a mobile device modem, and the receiver 710 and 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.

[0183] 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 communications.

[0184] Based on the techniques described herein for signaling beam correlation across millimeter wave bands, the processor of the UE 115 (e.g., controlling the receiver 710, the transmitter 740, or as described in reference to FIG) may be configured to: Figure 9 The described transceiver 920) can increase reliability and reduce signaling overhead in communications because the UE 115 can perform inter-band carrier aggregation across two or more frequency bands.

[0185] Figure 8A block diagram 800 is shown of a communication manager 805 that supports signaling of beam correlation across millimeter wave frequency bands in accordance with aspects of the present disclosure. The communication manager 805 can 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 can 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 can communicate with each other directly or indirectly (e.g., via one or more buses).

[0186] 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.

[0187] In some examples, the carrier aggregation configuration receiver 810 may receive a configuration message from the second wireless device that is specific to the bandwidth portions of the first frequency band and the second frequency band.

[0188] In some examples, the carrier aggregation configuration receiver 810 may receive a configuration message from the second wireless device that is specific to the second wireless device being in a transmission configuration indication state for use in the first and second millimeter wave frequency bands.

[0189] In some examples, the carrier aggregation configuration receiver 810 may receive a configuration message from the second wireless device as a weighted average metric indicating a status of two or more transmission configurations used by the second wireless device in the first and second millimeter wave frequency bands.

[0190] In some examples, the carrier aggregation configuration receiver 810 may determine weights for use with the weighted average metric and a transmission configuration indication of the second beam for use in determining the weighted average.

[0191] Beam correlation determining component 815 can determine beam correlation parameters based on the carrier aggregation configuration received from the second wireless device.

[0192] Beam determining component 820 can determine a first beam for use in communicating with a second wireless device on a first frequency band based on the beam correlation parameter.

[0193] In some examples, beam determining component 820 may determine a second beam for use in communicating with a second wireless device on a second frequency band based on the beam correlation parameter.

[0194] The carrier aggregation mode communicating component 825 can communicate with the second 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.

[0195] The broadcast message receiver 830 may receive a configuration message from the second wireless device as a broadcast message to one or more wireless devices including at least the first wireless device, a wireless device-specific message to the first wireless device, or both.

[0196] The millimeter wave band component 835 can receive a configuration message from the second wireless device, the configuration message specific to the second wireless device being in a transmission configuration indicating a state for use in the first and second frequency bands.

[0197] 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. 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.

[0198] 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.

[0199] Figure 9 A diagram of a system 900 including a device 905 that supports signaling for beam correlation across millimeter wave frequency bands according to aspects of the present disclosure is shown. The device 905 can be an example of, or include components of, the device 605, device 705, or UE 115 as described herein. The device 905 may include components for two-way voice and data communications, including 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).

[0200] The communication manager 910 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; determine a beam correlation parameter 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 parameter; determine a second beam for use in communicating with the second wireless device on the second frequency band based on the beam correlation parameter; and 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.

[0201] I / O controller 915 can manage input and output signals for device 905. I / O controller 915 can also manage peripheral devices that are not integrated into device 905. In some cases, I / O controller 915 can represent a physical connection or port to an external peripheral device. In some cases, I / O controller 915 can utilize an operating system, such as or another known operating system. In other cases, I / O controller 915 may represent or interact with a modem, keyboard, mouse, touch screen, or similar device. In some cases, I / O controller 915 may be implemented as part of a processor. In some cases, a user may interact with device 905 via I / O controller 915 or via hardware components controlled by I / O controller 915.

[0202] The transceiver 920 can communicate bidirectionally via one or more antennas, wired or wireless links, as described above. For example, the transceiver 920 can represent a wireless transceiver and can communicate bidirectionally with another wireless transceiver. The transceiver 920 can also include a modem to modulate packets and provide the modulated packets to the antenna for transmission, and demodulate packets received from the antenna.

[0203] 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 transmitting or receiving multiple wireless transmissions concurrently.

[0204] 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 include, among other things, a BIOS that may control basic hardware or software operations, such as interaction with peripheral components or devices.

[0205] The processor 940 may include an intelligent hardware device (e.g., a general-purpose processor, a DSP, a CPU, a microcontroller, an ASIC, an FPGA, a programmable logic device, a discrete gate or transistor logic component, a discrete hardware component, or any combination thereof). In some cases, the processor 940 may be configured to operate a memory array using a memory controller. In other cases, the memory controller may be integrated into the processor 940. The processor 940 may be configured to execute computer-readable instructions stored in a memory (e.g., memory 930) to cause the device 905 to perform various functions (e.g., functions or tasks supporting signaling of beam correlation across millimeter wave bands).

[0206] The code 935 may include instructions for implementing various aspects of the present disclosure, including instructions for supporting wireless communications. The code 935 may be stored in a non-transitory computer-readable medium, such as system memory or other types of memory. In some cases, the code 935 may not be directly executed by the processor 940, but may cause a computer (e.g., when compiled and executed) to perform the functions described herein.

[0207] Figure 10 A block diagram 1000 of a device 1005 supporting signaling of beam correlation across millimeter wave frequency bands according to aspects of the present disclosure is shown. The device 1005 can be an example of aspects of a base station 105 as described herein. The device 1005 can include a receiver 1010, a communication manager 1015, and a transmitter 1020. The device 1005 can also include a processor. Each of these components can be in communication with each other (e.g., via one or more buses).

[0208] The 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 of beam correlation across millimeter wave frequency bands, etc.). The information may be passed to other components of the device 1005. The receiver 1010 may be a reference Figure 13 Examples of various aspects of the transceiver 1320 are described. The receiver 1010 may utilize a single antenna or a collection of antennas.

[0209] The communication manager 1015 may: transmit a carrier aggregation configuration for communicating with the first wireless device to the first wireless device, the carrier aggregation configuration including at least a first frequency band and a second frequency band; determine a beam correlation parameter 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 different second millimeter wave frequency band, the first beam and the second beam being based on the beam correlation parameter. The communication manager 1015 may be an example of aspects of the communication manager 1310 described herein.

[0210] The communication manager 1015 or its subcomponents may be implemented in hardware, in 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 subcomponents may be performed by a general-purpose processor, a DSP, an ASIC, an FPGA or other programmable logic device designed to perform the functions described in this disclosure, discrete gate or transistor logic, discrete hardware components, or any combination thereof.

[0211] The communication manager 1015 or its subcomponents can be physically located at various locations, including being distributed such that portions of functionality are implemented by one or more physical components at different physical locations. In some examples, according to various aspects of the present disclosure, the communication manager 1015 or its subcomponents can be separate and distinct components. In some examples, according to various aspects of the present disclosure, the communication manager 1015 or its subcomponents can be combined with one or more other hardware components, including but not limited to input / output (I / O) components, a transceiver, a network server, another computing device, one or more other components described in the present disclosure, or a combination thereof.

[0212] 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 a reference Figure 13 Examples of aspects of the described transceiver 1320. The transmitter 1020 may utilize a single antenna or a collection of antennas.

[0213] Figure 11 A block diagram 1100 of a device 1105 supporting signaling of beam correlation across millimeter wave frequency bands according to aspects of the present disclosure is shown. The device 1105 may be an example of aspects of the device 1005 or base station 105 as 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).

[0214] 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 of beam correlation across millimeter wave frequency bands). The information may be passed to other components of the device 1105. The receiver 1110 may be a reference Figure 13 Examples of various aspects of the transceiver 1320 are described. The receiver 1110 may utilize a single antenna or a collection of antennas.

[0215] The communication manager 1115 may be an example of aspects of the communication manager 1015 as described herein. The communication manager 1115 may include a carrier aggregation configuration transmitter 1120, a beam correlation determination manager 1125, and a carrier aggregation mode manager 1130. The communication manager 1115 may be an example of aspects of the communication manager 1310 described herein.

[0216] The carrier aggregation configuration transmitter 1120 may transmit a carrier aggregation configuration for communicating with the first wireless device to the first wireless device, the carrier aggregation configuration including at least a first frequency band and a second frequency band.

[0217] The beam correlation determination manager 1125 may determine beam correlation parameters based on the carrier aggregation configuration.

[0218] 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 a beam correlation parameter.

[0219] 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 a reference Figure 13 Examples of various aspects of the described transceiver 1320. The transmitter 1135 may utilize a single antenna or a collection of antennas.

[0220] Figure 12 A block diagram 1200 is shown of a communication manager 1205 that supports signaling of beam correlation across millimeter wave bands in accordance with aspects of the present disclosure. The communication manager 1205 can be an example of aspects of the communication manager 1015, the communication manager 1115, or the communication manager 1310 described herein. The communication manager 1205 can 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 band manager 1230. Each of these modules can communicate with each other directly or indirectly (e.g., via one or more buses).

[0221] The carrier aggregation configuration transmitter 1210 may transmit a carrier aggregation configuration for communicating with the first wireless device to the first wireless device, the carrier aggregation configuration including at least a first frequency band and a second frequency band.

[0222] In some examples, the carrier aggregation configuration transmitter 1210 may transmit a configuration message to the first wireless device that is specific to the bandwidth portions of the first frequency band and the second frequency band.

[0223] In some examples, the carrier aggregation configuration transmitter 1210 may transmit a configuration message to the first wireless device that is specific to the second wireless device being in a transmission configuration indication state for use in the first and second millimeter wave frequency bands.

[0224] In some examples, the carrier aggregation configuration transmitter 1210 may transmit a configuration message to the first wireless device that is a weighted average metric indicating states of two or more transmission configurations used by the second wireless device in the first and second millimeter wave frequency bands.

[0225] The beam correlation determination manager 1215 may determine beam correlation parameters based on the carrier aggregation configuration.

[0226] The carrier aggregation mode manager 1220 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 a beam correlation parameter.

[0227] The broadcast message transmitter 1225 may transmit the configuration message to the first wireless device as a broadcast message to one or more wireless devices including at least the first wireless device, a wireless device-specific message to the first wireless device, or both.

[0228] The mmWave band manager 1230 may receive a configuration message from the second wireless device, the configuration message being specific to the second wireless device being in a transmission configuration indicating a state for use in the first and second frequency bands.

[0229] 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.

[0230] 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.

[0231] 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.

[0232] Figure 13 A diagram of a system 1300 including a device 1305 that supports signaling for beam correlation across millimeter wave frequency bands according to aspects of the present disclosure is shown. Device 1305 may be an example of, or include components of, device 1005, device 1105, or base station 105 as described herein. Device 1305 may include components for two-way voice and data communications, including components for transmitting and receiving communications, including a communications manager 1310, a network communications manager 1315, a transceiver 1320, an antenna 1325, a memory 1330, a processor 1340, and an inter-station communications manager 1345. These components may be in electronic communication via one or more buses (e.g., bus 1350).

[0233] The communication manager 1310 may: transmit a carrier aggregation configuration for communicating with the first wireless device to a first wireless device, the carrier aggregation configuration including at least a first frequency band and a second frequency band; determine a beam correlation parameter 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 parameter.

[0234] The network communications manager 1315 may manage communications with the core network (eg, via one or more wired backhaul links). For example, the network communications manager 1315 may manage the delivery of data communications for client devices, such as one or more UEs 115.

[0235] The transceiver 1320 can communicate bidirectionally via one or more antennas, wired or wireless links, as described above. For example, the transceiver 1320 can represent a wireless transceiver and can communicate bidirectionally with another wireless transceiver. The transceiver 1320 can also include a modem to modulate packets and provide the modulated packets to the antenna for transmission, and demodulate packets received from the antenna.

[0236] In some cases, a wireless device may include a single antenna 1325. However, in some cases, the device may have more than one antenna 1325, which may be capable of transmitting or receiving multiple wireless transmissions concurrently.

[0237] Memory 1330 may include RAM, ROM, or a combination thereof. 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 cases, memory 1330 may include, among other things, a BIOS that controls basic hardware or software operations, such as interaction with peripheral components or devices.

[0238] The processor 1340 may include an intelligent hardware device (e.g., a general-purpose processor, a DSP, a CPU, a microcontroller, an ASIC, an FPGA, a programmable logic device, discrete gate or transistor logic components, discrete hardware components, or any combination thereof). In some cases, the processor 1340 may be configured to operate a memory array using a memory controller. In some cases, the memory controller may be integrated into the processor 1340. The processor 1340 may be configured to execute computer-readable instructions stored in a memory (e.g., memory 1330) to cause the device 1305 to perform various functions (e.g., functions or tasks that support signaling of beam correlation across millimeter wave frequency bands).

[0239] The inter-site communication manager 1345 can manage communications with other base stations 105 and can include a controller or scheduler for controlling communications with the UE 115 in coordination with the other base stations 105. For example, the inter-site communication manager 1345 can 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-site communication manager 1345 can provide an X2 interface within an LTE / LTE-A wireless communication network technology to provide communications between the base stations 105.

[0240] The code 1335 may include instructions for implementing various aspects of the present disclosure, including instructions for supporting wireless communications. The code 1335 may be stored in a non-transitory computer-readable medium, such as system memory or other types of memory. In some cases, the code 1335 may not be directly executed by the processor 1340, but may cause a computer (e.g., when compiled and executed) to perform the functions described herein.

[0241] Figure 14 A flow chart illustrating a method 1400 for signaling supporting beam correlation across millimeter wave frequency bands according to aspects of the present disclosure is shown. The operations of the method 1400 may be implemented by a UE 115 or components thereof as described herein. For example, the operations of the method 1400 may be implemented by a UE 115 or components thereof as described herein. Figures 6 to 9 In some examples, the UE may execute an instruction set to control the functional elements of the UE to perform the following functions. Additionally or alternatively, the UE may use dedicated hardware to perform various aspects of the following functions.

[0242] At 1405, 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 of 1405 may be performed according to the methods described herein. In some examples, aspects of the operations of 1405 may be performed as described with reference to Figures 6 to 9 The described carrier aggregation is configured to be performed by the receiver.

[0243] 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, the first beam and the second beam being based at least in part on a beam correlation parameter based at least in part on a received carrier aggregation configuration. The operations of 1410 may be performed according to the methods described herein. In some examples, aspects of the operations of 1410 may be performed as described with reference to Figures 6 to 9 The beam correlation determination component described is performed.

[0244] Figure 15A flow chart illustrating a method 1500 for signaling supporting beam correlation across millimeter wave frequency bands according to aspects of the present disclosure is shown. The operations of the method 1500 may be implemented by a UE 115 or components thereof as described herein. For example, the operations of the method 1500 may be implemented by a UE 115 or components thereof as described herein. Figures 6 to 9 In some examples, the UE may execute an instruction set to control the functional elements of the UE to perform the following functions. Additionally or alternatively, the UE may use dedicated hardware to perform various aspects of the following functions.

[0245] 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 of 1505 may be performed according to the methods described herein. In some examples, aspects of the operations of 1505 may be performed as described with reference to Figures 6 to 9 The described carrier aggregation is configured to be performed by the receiver.

[0246] 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 to the first wireless device, or both. The operations of 1510 may be performed according to the methods described herein. In some examples, aspects of the operations of 1510 may be performed as described with reference to Figures 6 to 9 The described broadcast message receiver is executed.

[0247] At 1515, 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, the first beam and the second beam being based at least in part on a beam correlation parameter based at least in part on the received carrier aggregation configuration. The operations of 1515 may be performed according to the methods described herein. In some examples, aspects of the operations of 1515 may be performed as described with reference to Figures 6 to 9 The beam correlation determination component described is performed.

[0248] Figure 16 A flow chart illustrating a method 1600 for signaling supporting beam correlation across millimeter wave frequency bands according to aspects of the present disclosure is shown. The operations of the method 1600 may be implemented by a UE 115 or components thereof as described herein. For example, the operations of the method 1600 may be implemented by a UE 115 or components thereof as described herein. Figures 6 to 9 In some examples, the UE may execute an instruction set to control the functional elements of the UE to perform the following functions. Additionally or alternatively, the UE may use dedicated hardware to perform various aspects of the following functions.

[0249] At 1605, 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 of 1605 may be performed according to the methods described herein. In some examples, aspects of the operations of 1605 may be performed as described with reference to Figures 6 to 9 The described carrier aggregation is configured to be performed by the receiver.

[0250] At 1610, the UE may receive a configuration message from a second wireless device that is specific to a bandwidth portion of a first frequency band and a second frequency band. The operations of 1610 may be performed according to the methods described herein. In some examples, aspects of the operations of 1610 may be performed as described with reference to Figures 6 to 9 The described carrier aggregation is configured to be performed by the receiver.

[0251] At 1615, 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, the first beam and the second beam being based at least in part on a beam correlation parameter based at least in part on the received carrier aggregation configuration. The operations of 1615 may be performed according to the methods described herein. In some examples, aspects of the operations of 1615 may be performed as described with reference to Figures 6 to 9 The beam correlation determination component described is performed.

[0252] Figure 17 A flow chart illustrating a method 1700 for signaling supporting beam correlation across millimeter wave frequency bands according to aspects of the present disclosure is shown. The operations of the method 1700 may be implemented by a UE 115 or components thereof as described herein. For example, the operations of the method 1700 may be implemented by a UE 115 or components thereof as described herein. Figures 6 to 9 In some examples, the UE may execute an instruction set to control the functional elements of the UE to perform the following functions. Additionally or alternatively, the UE may use dedicated hardware to perform various aspects of the following functions.

[0253] At 1705, 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 of 1705 may be performed according to the methods described herein. In some examples, aspects of the operations of 1705 may be performed as described with reference to Figures 6 to 9 The described carrier aggregation is configured to be performed by the receiver.

[0254] At 1710, the UE may receive a configuration message from a second wireless device, the configuration message being specific to the second wireless device being in a transmission configuration indication state for use in the first and second millimeter wave frequency bands. The operations of 1710 may be performed according to the methods described herein. In some examples, aspects of the operations of 1710 may be performed as described with reference to Figures 6 to 9 The described carrier aggregation is configured to be performed by the receiver.

[0255] At 1715, 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, the first beam and the second beam being based at least in part on a beam correlation parameter based at least in part on the received carrier aggregation configuration. The operations of 1715 may be performed according to the methods described herein. In some examples, aspects of the operations of 1715 may be performed as described with reference to Figures 6 to 9 The beam correlation determination component described is performed.

[0256] Figure 18 1 is a flow chart illustrating a method 1800 for signaling supporting beam correlation across frequency bands according to aspects of the present disclosure. The operations of the method 1800 may be implemented by the base station 105 or components thereof as described herein. For example, the operations of the method 1800 may be implemented by the base station 105 or components thereof as described herein. Figures 10 to 13 In some examples, a base station may execute an instruction set to control functional elements of the base station to perform the functions described below. Additionally or alternatively, the base station may use dedicated hardware to perform various aspects of the functions described below.

[0257] At 1805, the base station may transmit a carrier aggregation configuration for communicating with the first wireless device to the first wireless device, the carrier aggregation configuration including at least a first frequency band and a second frequency band. The operations of 1805 may be performed according to the methods described herein. In some examples, aspects of the operations of 1805 may be performed as described with reference to Figures 10 to 13 The described carrier aggregation configures the transmitter to perform.

[0258] At 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 being based at least in part on a beam correlation parameter based at least in part on a received carrier aggregation configuration. The operations of 1810 may be performed according to the methods described herein. In some examples, aspects of the operations of 1810 may be performed as described with reference to Figures 10 to 13 The described beam correlation determination manager is performed.

[0259] Figure 19 A flow chart illustrating a method 1900 for signaling supporting beam correlation across millimeter wave frequency bands according to aspects of the present disclosure is shown. The operations of the method 1900 may be implemented by a UE 115 or components thereof as described herein. For example, the operations of the method 1900 may be implemented by a UE 115 or components thereof as described herein. Figures 6 to 9In some examples, the UE may execute an instruction set to control the functional elements of the UE to perform the following functions. Additionally or alternatively, the UE may use dedicated hardware to perform various aspects of the following functions.

[0260] At 1905, the UE may receive an inter-band carrier aggregation configuration from a second wireless device 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. The operations of 1905 may be performed according to the methods described herein. In some examples, aspects of the operations of 1905 may be performed as described with reference to Figures 6 to 9 The described carrier aggregation is configured to be performed by the receiver.

[0261] At 1910, the UE may determine a beam correlation parameter based on an inter-band carrier aggregation configuration received from a second wireless device. The operations of 1910 may be performed according to the methods described herein. In some examples, aspects of the operations of 1910 may be performed as described with reference to Figures 6 to 9 The beam correlation determination component described is performed.

[0262] At 1915, the UE may determine a first beam for use in communications with a second wireless device on a first millimeter wave frequency band based on the beam correlation parameter. The operations of 1915 may be performed according to the methods described herein. In some examples, aspects of the operations of 1915 may be performed as described with reference to Figures 6 to 9 The beam determination component described is performed.

[0263] At 1920, the UE may determine a second beam for use in communications with a second wireless device on a second millimeter wave frequency band based on the beam correlation parameter. The operations of 1920 may be performed according to the methods described herein. In some examples, aspects of the operations of 1920 may be performed as described with reference to Figures 6 to 9 The beam determination component described is performed.

[0264] At 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 frequency band and a second beam on a second millimeter wave frequency band. The operations of 1925 may be performed according to the methods described herein. In some examples, aspects of the operations of 1925 may be performed as described with reference to Figures 6 to 9 The described carrier aggregation mode communication components are performed.

[0265] Figure 20 A flow chart illustrating a method 2000 for signaling supporting beam correlation across millimeter wave frequency bands according to aspects of the present disclosure is shown. The operations of the method 2000 may be implemented by the UE 120 or components thereof as described herein. For example, the operations of the method 2000 may be implemented by the UE 120 or components thereof as described herein. Figures 6 to 9In some examples, the UE may execute an instruction set to control the functional elements of the UE to perform the following functions. Additionally or alternatively, the UE may use dedicated hardware to perform various aspects of the following functions.

[0266] At 2005, the UE may receive an inter-band carrier aggregation configuration from a second wireless device 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. The operations of 2005 may be performed according to the methods described herein. In some examples, aspects of the operations of 2005 may be performed as described with reference to Figures 6 to 9 The described carrier aggregation is configured to be performed by the receiver.

[0267] At 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 the first wireless device, a wireless device-specific message to the first wireless device, or both. The operations of 2010 may be performed according to the methods described herein. In some examples, aspects of the operations of 2010 may be performed as described with reference to Figures 6 to 9 The described broadcast message receiver is executed.

[0268] At 2020, the UE may determine a beam correlation parameter based on the inter-band carrier aggregation configuration received from the second wireless device. 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 as described with reference to Figures 6 to 9 The beam correlation determination component described is performed.

[0269] At 2020, the UE may determine a first beam for use in communications with a second wireless device on a first millimeter wave frequency band based on the beam correlation parameter. 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 as described with reference to Figures 6 to 9 The beam determination component described is performed.

[0270] At 2025, the UE may determine a second beam for use in communications with a second wireless device on a second millimeter wave frequency band based on the beam correlation parameter. 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 as described with reference to Figures 6 to 9 The beam determination component described is performed.

[0271] At 2030, 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 frequency band and a second beam on a second millimeter wave frequency 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 as described with reference to Figures 6 to 9 The described carrier aggregation mode communication components are performed.

[0272] Figure 21 A flow chart illustrating a method 2100 for signaling supporting beam correlation across millimeter wave frequency bands according to aspects of the present disclosure is shown. The operations of the method 2100 may be implemented by a UE 115 or components thereof as described herein. For example, the operations of the method 2100 may be implemented by a UE 115 or components thereof as described herein. Figures 6 to 9 In some examples, the UE may execute an instruction set to control the functional elements of the UE to perform the following functions. Additionally or alternatively, the UE may use dedicated hardware to perform various aspects of the following functions.

[0273] At 2105, the UE may receive an inter-band carrier aggregation configuration from a second wireless device 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. 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 as described with reference to Figures 6 to 9 The described carrier aggregation is configured to be performed by the receiver.

[0274] At 2110, the UE may receive a configuration message from the second wireless device specific to the bandwidth portion of the first and second millimeter wave frequency bands. 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 as described with reference to Figures 6 to 9 The described carrier aggregation is configured to be performed by the receiver.

[0275] At 2115, the UE may determine a beam correlation parameter based on the inter-band carrier aggregation configuration received from the second wireless device. The operations of 2115 may be performed according to the methods described herein. In some examples, aspects of the operations of 2115 may be performed as described with reference to Figures 6 to 9 The beam correlation determination component described is performed.

[0276] At 2120, the UE may determine a first beam for use in communications with a second wireless device on a first millimeter wave frequency band based on the beam correlation parameter. The operations of 2120 may be performed according to the methods described herein. In some examples, aspects of the operations of 2120 may be performed as described with reference to Figures 6 to 9 The beam determination component described is performed.

[0277] At 2125, the UE may determine a second beam for use in communications with a second wireless device on a second millimeter wave frequency band based on the beam correlation parameter. The operations of 2125 may be performed according to the methods described herein. In some examples, aspects of the operations of 2125 may be as described with reference to Figures 6 to 9 The beam determination component described is performed.

[0278] At 2130, 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 frequency band and a second beam on a second millimeter wave frequency band. The operations of 2130 may be performed according to the methods described herein. In some examples, aspects of the operations of 2130 may be performed as described with reference to Figures 6 to 9 The described carrier aggregation mode communication components are performed.

[0279] Figure 22 A flow chart illustrating a method 2200 for signaling supporting beam correlation across millimeter wave frequency bands according to aspects of the present disclosure is shown. The operations of the method 2200 may be implemented by a UE 115 or components thereof as described herein. For example, the operations of the method 2200 may be implemented by a UE 115 or components thereof as described herein. Figures 6 to 9 In some examples, the UE may execute an instruction set to control the functional elements of the UE to perform the following functions. Additionally or alternatively, the UE may use dedicated hardware to perform various aspects of the following functions.

[0280] At 2205, the UE may receive an inter-band carrier aggregation configuration from a second wireless device 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. The operations of 2205 may be performed according to the methods described herein. In some examples, aspects of the operations of 2205 may be performed as described with reference to Figures 6 to 9 The described carrier aggregation is configured to be performed by the receiver.

[0281] At 2210, the UE may receive a configuration message from a second wireless device, the configuration message being specific to the second wireless device being in a transmission configuration indication state for use in the first and second millimeter wave frequency bands. The operations of 2210 may be performed according to the methods described herein. In some examples, aspects of the operations of 2210 may be as described with reference to Figures 6 to 9 The described carrier aggregation is configured to be performed by the receiver.

[0282] At 2215, the UE may determine a beam correlation parameter based on the inter-band carrier aggregation configuration received from the second wireless device. The operations of 2215 may be performed according to the methods described herein. In some examples, aspects of the operations of 2215 may be performed as described with reference to Figures 6 to 9 The beam correlation determination component described is performed.

[0283] At 2220, the UE may determine a first beam for use in communications with a second wireless device on a first millimeter wave frequency band based on the beam correlation parameter. The operations of 2220 may be performed according to the methods described herein. In some examples, aspects of the operations of 2220 may be as described with reference to Figures 6 to 9 The beam determination component described is performed.

[0284] At 2225, the UE may determine a second beam for use in communications with a second wireless device on a second millimeter wave frequency band based on the beam correlation parameter. The operations of 2225 may be performed according to the methods described herein. In some examples, aspects of the operations of 2225 may be performed as described with reference to Figures 6 to 9 The beam determination component described is performed.

[0285] At 2230, 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 frequency band and a second beam on a second millimeter wave frequency band. The operations of 2230 may be performed according to the methods described herein. In some examples, aspects of the operations of 2230 may be performed as described with reference to Figures 6 to 9 The described carrier aggregation mode communication components are performed.

[0286] Figure 23 A flow chart illustrating a method 2300 for signaling supporting beam correlation across millimeter wave frequency bands according to aspects of the present disclosure is shown. The operations of the method 2300 may be implemented by a base station 105 or components thereof as described herein. For example, the operations of the method 2300 may be implemented by a base station 105 or components thereof as described herein. Figures 10 to 13 In some examples, a base station may execute an instruction set to control functional elements of the base station to perform the functions described below. Additionally or alternatively, the base station may use dedicated hardware to perform various aspects of the functions described below.

[0287] At 2305, the base station may transmit to the first wireless device an inter-band carrier aggregation configuration for communication with 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. 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 as described with reference to Figures 10 to 13 The described carrier aggregation configures the transmitter to perform.

[0288] At 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 as described with reference to Figures 10 to 13 The described beam correlation determination manager is performed.

[0289] At 2315, the base station 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 a beam correlation parameter. 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 as described with reference to Figures 10 to 13 The described carrier aggregation mode manager is executed.

[0290] It should be noted that the methods described herein describe possible implementations, and that the operations and steps may be rearranged or otherwise modified and other implementations are possible. Furthermore, aspects from two or more methods may be combined.

[0291] 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 terminology may be used throughout much of the description, the techniques described herein may also be applicable to networks other than LTE, LTE-A, LTE-A Pro, or NR networks. For example, the techniques described may be applicable 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.

[0292] The information and signals described herein may be represented using any of a variety of different technologies 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 voltages, currents, electromagnetic waves, magnetic fields or particles, optical fields or particles, or any combination thereof.

[0293] The various illustrative blocks and components described in conjunction with the disclosure herein may 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, a plurality of microprocessors, one or more microprocessors in conjunction with a DSP core, or any other such configuration).

[0294] The functions described herein may be implemented in hardware, software executed by a processor, firmware, or any combination thereof. If implemented in software executed by a processor, the functions may be stored on or transmitted by a computer-readable medium as one or more instructions or code. Other examples and implementations fall within the scope of this disclosure and the appended claims. For example, due to the nature of software, the functions described herein may be implemented using software executed by a processor, hardware, firmware, hardwiring, or any combination thereof. Features that implement the functions may also be physically located in various locations, including being distributed so that parts of the functions are implemented at different physical locations.

[0295] Computer-readable media include both non-transient computer storage media and communication media, which include any media that facilitates a computer program to be transferred from one place to another. Non-transient storage media can be any available medium that can be accessed by a general or special-purpose computer. As an example and not limitation, non-transient 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-transient medium that can be used to carry or store the desired program code means of an instruction or data structure form and can be accessed by a general or special-purpose computer, or a general or special-purpose processor. Similarly, any connection is also properly referred to as a computer-readable medium. For example, if software is transmitted from a website, server or other remote source using a coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), or wireless technologies such as infrared, radio, and microwaves, then the coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, radio, and microwaves are included in the definition of computer-readable media. Disk and disc, as used herein, include CDs, laser discs, optical discs, digital versatile discs (DVDs), floppy disks, and Blu-ray discs, where disks usually reproduce data magnetically, while discs reproduce data optically with lasers. Combinations of the above are also included within the scope of computer-readable media.

[0296] As used herein (including in the claims), "or" used in a list of items (e.g., a list of items followed by a phrase such as "at least one of" or "one or more of") indicates an inclusive list, so that, for example, a list of at least one of A, B, or C means A or B or C or AB or AC or BC or ABC (i.e., A and B and C). Likewise, as used herein, the phrase "based on" should not be read as referencing a closed set of conditions. For example, an example step described as "based on condition A" could be based on both condition A and condition B without departing from the scope of this disclosure. In other words, as used herein, the phrase "based on" should be read in the same manner as the phrase "based at least in part on."

[0297] In the accompanying drawings, similar components or features may have the same reference number. In addition, components of the same type may be distinguished by following the reference number with a dash and a second reference number that distinguishes between the similar components. If only the first reference number is used in the specification, the description applies to any of the similar components having the same first reference number, regardless of the second reference number or other subsequent reference numbers.

[0298] The description set forth herein in conjunction with the accompanying drawings describes example configurations and does not represent all examples that can 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 "better than" or "better than other examples." This detailed description includes specific details to provide an understanding of the described techniques. However, these techniques can be practiced without these specific details. In some instances, known structures and devices are shown in block diagram form to avoid obscuring the concepts of the described examples.

[0299] The description herein is provided to enable one of ordinary skill in the art to make or use the present disclosure. Various modifications to the present disclosure will be readily apparent to those 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.

[0300] The following provides an overview of various examples of the present disclosure: Aspect 1: A method for wireless communication at a first wireless device, comprising: receiving a carrier aggregation configuration for communicating with the second wireless device from a 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 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.

[0301] Aspect 2: The method of aspect 1, wherein receiving the carrier aggregation configuration further comprises: receiving the inter-band carrier aggregation configuration from the second wireless device.

[0302] Aspect 3: The method according to 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.

[0303] Aspect 4: A method as in any one of Aspects 1 to 3, wherein receiving the carrier aggregation configuration includes: 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.

[0304] Aspect 5: The method of any one of aspects 1 to 4, wherein receiving the carrier aggregation configuration comprises receiving a configuration message specific to the bandwidth portion of the first frequency band and the second frequency band from the second wireless device.

[0305] Aspect 6: The method of any one of aspects 1 to 5, wherein receiving the carrier aggregation configuration comprises: receiving a configuration message from the second wireless device, the configuration message being specific to the second wireless device being in a transmission configuration indication state for use in the first and second frequency bands.

[0306] Aspect 7: The method of any one of Aspects 1 to 6, wherein receiving the carrier aggregation configuration comprises: receiving a configuration message from the 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 the first and second frequency bands.

[0307] Aspect 8: The method of aspect 7, wherein communicating in carrier aggregation further comprises communicating in carrier aggregation based at least in part on a weight for use with the weighted average metric and a transmission configuration indication state of the second beam used in determining the weighted average.

[0308] 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.

[0309] Aspect 10: The method of 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.

[0310] Aspect 11: The method of any one of aspects 1 to 10, wherein 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.

[0311] Aspect 12: A method for wireless communication at a second wireless device, comprising: transmitting a carrier aggregation configuration for communicating with the first wireless device to a 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 the second millimeter wave 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.

[0312] Aspect 13: The method of aspect 12, wherein transmitting the carrier aggregation configuration further comprises: transmitting the inter-band carrier aggregation configuration from the second wireless device.

[0313] Aspect 14: The method of 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.

[0314] Aspect 15: A 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.

[0315] Aspect 16: The method of any one of aspects 12 to 15, wherein transmitting the carrier aggregation configuration comprises transmitting a configuration message specific to the bandwidth portion of the first frequency band and the second frequency band to the first wireless device.

[0316] Aspect 17: The method of any one of aspects 12 to 16, wherein transmitting the carrier aggregation configuration comprises transmitting a configuration message to the first wireless device, the configuration message being specific to the second wireless device being in a transmission configuration indication state for use in the first and second frequency bands.

[0317] Aspect 18: The method of any one of aspects 12 to 17, wherein transmitting the carrier aggregation configuration comprises transmitting a configuration message to the first wireless device as 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.

[0318] Aspect 19: The method of 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.

[0319] Aspect 20: The method of any one of aspects 12 to 19, wherein 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.

[0320] Aspect 21: The method of 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.

[0321] 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 configured to perform the method of any one of aspects 1 to 11.

[0322] Aspect 23: An apparatus for wireless communication at a first wireless device, comprising at least one means for performing the method of any one of aspects 1 to 11.

[0323] 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 the method of any one of aspects 1 to 11.

[0324] 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 configured to perform the method of any one of aspects 12 to 21.

[0325] Aspect 26: An apparatus comprising at least one means for performing the method of any one of aspects 12 to 21.

[0326] Aspect 27: A non-transitory computer-readable medium storing code, the code comprising instructions executable by a processor to perform the method of any one of aspects 12 to 21.

[0327] Aspect 28: A method for wireless communication at a first device, comprising: receiving 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 frequency band and a second millimeter wave frequency band; determining a beam correlation parameter based at least in part 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 at least in part on the beam correlation parameter; determining a second beam for use in communicating with the second wireless device on the second millimeter wave frequency band based at least in part 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 frequency band and the second beam on the second millimeter wave frequency band.

[0328] 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 as 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.

[0329] Aspect 30: The method of any of Aspects 28 or 29, wherein receiving the inter-band carrier aggregation configuration comprises receiving a configuration message specific to the bandwidth portions of the first and second millimeter wave frequency bands from the second wireless device.

[0330] 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, the configuration message being specific to the second wireless device being in a transmission configuration indication state for use in the first and second millimeter wave frequency bands.

[0331] Aspect 32: A method as in any of Aspects 28 to 31, wherein receiving the inter-band carrier aggregation configuration includes: receiving a configuration message from the 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 the first and second millimeter wave frequency bands.

[0332] 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 for use in determining the weighted average.

[0333] Aspect 34: The method of any one of Aspects 28 to 33, wherein 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.

[0334] Aspect 35: The method of any one of Aspects 28 to 34, wherein 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 greater than 52.6 GHz.

[0335] Aspect 36: The method of any one of aspects 28 to 35, wherein the first wireless device is a UE or 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.

[0336] Aspect 37: A method for wireless communication at a second wireless device, comprising: transmitting an inter-band carrier aggregation configuration for communicating with the first wireless device to a 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 a beam correlation parameter 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 at least partially based on the beam correlation parameter.

[0337] Aspect 38: A method as in any 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.

[0338] Aspect 39: The method of any one of aspects 28 to 38, wherein transmitting the inter-band carrier aggregation configuration comprises transmitting a configuration message specific to the bandwidth portions of the first and second millimeter wave frequency bands to the first wireless device.

[0339] Aspect 40: The method of any one of aspects 28 to 39, wherein transmitting the inter-band carrier aggregation configuration comprises transmitting a configuration message to the first wireless device, the configuration message being specific to the second wireless device being in a transmission configuration indication state for use in the first and second millimeter wave frequency bands.

[0340] Aspect 41: A method as in any of Aspects 28 to 40, wherein transmitting the inter-band 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 millimeter wave frequency bands.

[0341] Aspect 42: The method of any one of Aspects 28 to 41, wherein 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.

[0342] Aspect 43: The method of any one of aspects 28 to 41, wherein 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.

[0343] Aspect 44: The method of any one of Aspects 28 to 43, wherein 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 greater than 52.6 GHz.

[0344] Aspect 45: A method as in any one 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.

[0345] Aspect 46: An apparatus for wireless communication, comprising at least one means for performing the method of any one of Aspects 28 to 45.

[0346] Aspect 47: An apparatus for wireless communication, comprising: a processor; a memory in electronic communication with the processor; and instructions stored in the memory and executable by the processor to cause the apparatus to perform the method of any one of Aspects 28 to 45.

[0347] Aspect 48: A non-transitory computer-readable medium storing code for wireless communication, comprising: 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 a method as in any one of Aspects 28 to 45.

Claims

1. 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 comprising at least a first frequency band and a second frequency band; as well as Means for communicating with the second 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 based at least in part on a beam correlation parameter based at least in part on the received carrier aggregation configuration.

2. The apparatus of claim 1, further comprising: Means for receiving an inter-band carrier aggregation configuration from the second wireless device. 3 . The apparatus of 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 apparatus of claim 1, further comprising: Means for receiving a configuration message from the second wireless device as a broadcast message to one or more wireless devices including at least the first wireless device, a wireless device-specific message to the first wireless device, or both.

5. The apparatus of claim 1, further comprising: Means for receiving, from the second wireless device, a configuration message specific to the bandwidth portion of the first frequency band and the second frequency band.

6. 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 comprising at least a first frequency band and a second frequency band; as well as Means for communicating 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 based at least in part on a beam correlation parameter based at least in part on the received carrier aggregation configuration.

7. The apparatus of claim 6, further comprising: means for transmitting, from the second wireless device, an inter-band carrier aggregation configuration.

8. The apparatus of claim 7, wherein the first frequency band is a first millimeter wave frequency band and the second frequency band is a second millimeter wave frequency band.

9. The apparatus of claim 7, further comprising: Means for transmitting a configuration message to the first wireless device as a broadcast message to one or more wireless devices including at least the first wireless device, a wireless device-specific message to the first wireless device, or both.

10. The apparatus of claim 6, wherein the means for transmitting the carrier aggregation configuration comprises: Means for transmitting, to the first wireless device, a configuration message specific to the bandwidth portion of the first frequency band and the second frequency band.

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