Transmit Configuration Indicator Status for Subband

Abstract

Various aspects of the present disclosure generally relate to wireless communications. In some aspects, a user equipment (UE) may receive a first radio resource control (RRC) configuration message from a base station associated with a first subband and indicating a first set of transmission configuration indicator (TCI) states to use on the first subband. The UE may further receive a second RRC configuration message from the base station associated with a second subband included in the wideband channel and indicating a second set of TCI states to use on the second subband. Alternatively, the UE may receive an RRC configuration message from the base station including at least a first list of first TCI states associated with the first subband and a second list of second TCI states associated with the second subband. Numerous other aspects are described.

Description

[Technical field]

[0001] (CROSS REFERENCE TO RELATED APPLICATIONS)

[0001] This patent application claims priority to U.S. Non-Provisional Patent Application No. 17 / 447,643, entitled "TRANSMISSION CONFIGURATION INDICATOR STATES FOR SUBBANDS," filed September 14, 2021, which is expressly incorporated by reference into this specification.

[0002] Aspects of the present disclosure relate generally to wireless communications and to techniques and apparatus for using a transmission configuration indicator state for a subband. [Background technology]

[0003]

[0003] Wireless communication systems have been widely deployed to provide various telecommunication services, such as telephone, video, data, messaging, and broadcast. A typical wireless communication system may utilize multiple access technologies capable of supporting communication with multiple users by sharing available system resources (e.g., bandwidth, transmit power, etc.). Examples of such multiple access technologies include Code Division Multiple Access (CDMA) systems, Time Division Multiple Access (TDMA) systems, Frequency Division Multiple Access (FDMA) systems, Orthogonal Frequency Division Multiple Access (OFDMA) systems, Single Carrier Frequency Division Multiple Access (SC-FDMA) systems, Time Division Synchronous Code Division Multiple Access (TD-SCDMA) systems, and Long Term Evolution (LTE). LTE / LTE-Advanced is a set of improvements to the Universal Mobile Telecommunications System (UMTS) mobile standard promulgated by the 3rd Generation Partnership Project (3GPP).

[0004]

[0004] A wireless network may include one or more base stations that support communication for a user equipment (UE) or multiple UEs. A UE may communicate with a base station via downlink and uplink communications. "Downlink" (or "DL") refers to the communication link from a base station to a UE, and "Uplink" (or "UL") refers to the communication link from a UE to a base station.

[0005]

[0005] The above multiple access technologies have been adopted in various communication standards to provide a common protocol that allows different UEs to communicate on a city, country, region, and / or global scale. New Radio (NR), sometimes referred to as 5G, is a set of extensions to the LTE mobile standard promulgated by 3GPP. NR is designed to better support mobile broadband Internet access by improving spectral efficiency, lowering costs, improving services, utilizing new spectrum, and using Orthogonal Frequency Division Multiplexing (OFDM) with Cyclic Prefix (CP) (CP-OFDM) on the downlink and CP-OFDM and / or Single Carrier Frequency Division Multiplexing (SC-FDM) (also known as Discrete Fourier Transform Spread OFDM (DFT-s-OFDM)) on the uplink, as well as better integrating with other open standards that support beamforming, multiple-input multiple-output (MIMO) antenna technology, and carrier aggregation. As the demand for mobile broadband access continues to grow, further improvements in LTE, NR, and other radio access technologies remain useful. Summary of the Invention

[0006]

[0006] Certain aspects described herein relate to an apparatus for wireless communication in a user equipment (UE). The apparatus may include a memory and one or more processors coupled to the memory. The memory may store instructions executable by the one or more processors to cause the UE to receive from the base station a first radio resource control (RRC) configuration message associated with a first subband included in a wideband channel between the UE and the base station and indicating a first set of transmission configuration indicator (TCI) states for use on the first subband. The memory may store instructions executable by the one or more processors to further cause the UE to receive from the base station a second RRC configuration message associated with a second subband included in the wideband channel and indicating a second set of TCI states for use on the second subband.

[0007]

[0007] Certain aspects described herein relate to an apparatus for wireless communication in a base station. The apparatus may include a memory and one or more processors coupled to the memory. The memory may store instructions executable by the one or more processors to cause the base station to transmit a first RRC configuration message to the UE associated with a first subband included in a wideband channel between the UE and the base station and indicating a first set of TCI states to use on the first subband. The memory may store instructions executable by the one or more processors to further cause the base station to transmit a second RRC configuration message to the UE associated with a second subband included in the wideband channel and indicating a second set of TCI states to use on the second subband.

[0008]

[0008] Some aspects described herein relate to an apparatus for wireless communication in a UE. The apparatus may include a memory and one or more processors coupled to the memory. The memory may store instructions executable by the one or more processors to cause the UE to receive from a base station an RRC configuration message including at least a first list of a first TCI state associated with a first subband and a second list of a second TCI state associated with a second subband. The memory may store instructions executable by the one or more processors to cause the UE to further receive from the base station an indication of the first subband and the second subband.

[0009]

[0009] Certain aspects described herein relate to an apparatus for wireless communication in a base station. The apparatus may include a memory and one or more processors coupled to the memory. The memory may store instructions executable by the one or more processors to cause the base station to transmit an RRC configuration message to the UE, the RRC configuration message including at least a first list of a first TCI state associated with a first subband and a second list of a second TCI state associated with a second subband. The memory may store instructions executable by the one or more processors to cause the base station to further transmit an indication of the first subband and the second subband to the UE.

[0010] Certain aspects described herein relate to a method of wireless communication implemented by a UE. The method may include receiving a first RRC configuration message from the base station, the first RRC configuration message being associated with a first subband included in a wideband channel between the UE and the base station and indicating a first set of TCI states for use on the first subband. The method may further include receiving a second RRC configuration message from the base station, the second RRC configuration message being associated with a second subband included in the wideband channel and indicating a second set of TCI states for use on the second subband.

[0011]

[0011] Certain aspects described herein relate to a method of wireless communication performed by a base station. The method may include transmitting a first RRC configuration message to the UE, the first RRC configuration message being associated with a first subband included in a wideband channel between the UE and the base station and indicating a first set of TCI states to use on the first subband. The method may further include transmitting a second RRC configuration message to the UE, the second RRC configuration message being associated with a second subband included in the wideband channel and indicating a second set of TCI states to use on the second subband.

[0012] Certain aspects described herein relate to a method of wireless communication implemented by a UE. The method may include receiving an RRC configuration message from a base station, the RRC configuration message including at least a first list of a first TCI state associated with a first subband and a second list of a second TCI state associated with a second subband. The method may further include receiving an indication of the first subband and the second subband from the base station.

[0013] Some aspects described herein relate to a method of wireless communication performed by a base station. The method may include transmitting an RRC configuration message to a UE, the RRC configuration message including at least a first list of a first TCI state associated with a first subband and a second list of a second TCI state associated with a second subband. The method may further include transmitting an indication of the first subband and the second subband to the UE.

[0014]

[0014] Some aspects described herein relate to an apparatus for wireless communication. The apparatus may include means for receiving a first RRC configuration message from the base station, the first RRC configuration message being associated with a first subband included in a wideband channel between the apparatus and the base station and indicating a first set of TCI states for use on the first subband. The apparatus may further include means for receiving a second RRC configuration message from the base station, the second RRC configuration message being associated with a second subband included in the wideband channel and indicating a second set of TCI states for use on the second subband.

[0015]

[0015] Some aspects described herein relate to an apparatus for wireless communication. The apparatus may include means for transmitting a first RRC configuration message to the UE, the first RRC configuration message being associated with a first subband included in a wideband channel between the UE and the apparatus and indicating a first set of TCI states to use on the first subband. The apparatus may further include means for transmitting a second RRC configuration message to the UE, the second RRC configuration message being associated with a second subband included in the wideband channel and indicating a second set of TCI states to use on the second subband.

[0016] Some aspects described herein relate to an apparatus for wireless communication. The apparatus may include means for receiving an RRC configuration message from a base station, the RRC configuration message including at least a first list of a first TCI state associated with a first subband and a second list of a second TCI state associated with a second subband. The apparatus may further include means for receiving an indication of the first subband and the second subband from the base station.

[0017]

[0017] Certain aspects described herein relate to an apparatus for wireless communication. The apparatus may include means for transmitting an RRC configuration message to a UE, the RRC configuration message including at least a first list of a first TCI state associated with a first subband and a second list of a second TCI state associated with a second subband. The apparatus may further include means for transmitting an indication of the first subband and the second subband to the UE.

[0018]

[0018] Certain aspects described herein relate to a non-transitory computer-readable medium storing one or more instructions for wireless communication by a UE. The one or more instructions, when executed by one or more processors of the UE, may cause the UE to receive a first RRC configuration message from the base station, the first RRC configuration message being associated with a first subband included in a wideband channel between the UE and the base station and indicating a first set of TCI states for use on the first subband. The one or more instructions, when executed by the one or more processors of the UE, may further cause the UE to receive a second RRC configuration message from the base station, the second RRC configuration message being associated with a second subband included in the wideband channel and indicating a second set of TCI states for use on the second subband.

[0019]

[0019] Certain aspects described herein relate to a non-transitory computer-readable medium storing one or more instructions for wireless communication by a base station. The one or more instructions, when executed by one or more processors of the base station, may cause the base station to transmit a first RRC configuration message to the base station, the first RRC configuration message being associated with a first subband included in a wideband channel between the UE and the base station and indicating a first set of TCI states to use on the first subband. The one or more instructions, when executed by one or more processors of the base station, may further cause the base station to transmit a second RRC configuration message to the UE, the second RRC configuration message being associated with a second subband included in the wideband channel and indicating a second set of TCI states to use on the second subband.

[0020]

[0020] Certain aspects described herein relate to a non-transitory computer-readable medium storing one or more instructions for wireless communication by a UE. The one or more instructions, when executed by one or more processors of the UE, may cause the UE to receive an RRC configuration message from a base station, the RRC configuration message including at least a first list of a first TCI state associated with a first subband and a second list of a second TCI state associated with a second subband. The one or more instructions, when executed by the one or more processors of the UE, may further cause the UE to receive an indication of the first subband and the second subband from the base station.

[0021]

[0021] Certain aspects described herein relate to a non-transitory computer-readable medium storing one or more instructions for wireless communication by a base station. The one or more instructions, when executed by one or more processors of the base station, may cause the base station to transmit an RRC configuration message to a UE, the RRC configuration message including at least a first list of a first TCI state associated with a first subband and a second list of a second TCI state associated with a second subband. The one or more instructions, when executed by the one or more processors of the base station, may further cause the base station to transmit an indication of the first subband and the second subband to the UE.

[0022]

[0022] Aspects generally include methods, apparatus, systems, computer program products, non-transitory computer-readable media, user equipment, base stations, wireless communication devices, and / or processing systems as fully described herein with reference to the drawings and this specification, and as illustrated by the drawings and this specification.

[0023]

[0023] The above outlines rather broadly the features and technical advantages of the examples according to the present disclosure in order to better understand the following "Description of the Preferred Embodiments". Additional features and advantages are described below. The concepts and specific examples disclosed may be readily utilized as a basis for modifying or designing other structures for carrying out the same purposes of the present disclosure. Such equivalent structures are within the scope of the appended claims. The nature of the concepts disclosed herein, both their organization and the method of operation, together with associated advantages, will be better understood from the following description when considered in conjunction with the accompanying figures. Each of the figures is provided for the purpose of illustration and description, and is not intended as a definition of the limits of the claims.

[0024]

[0024] Although aspects are described in this disclosure by illustrating some examples, those skilled in the art will understand that such aspects can be implemented in many different configurations and scenarios. The techniques described herein can be implemented using different platform types, devices, systems, shapes, sizes, and / or packaging configurations. For example, some aspects can be implemented via integrated chip embodiments or other non-modular component-based devices (e.g., end-user devices, vehicles, communication devices, computing devices, industrial equipment, retail / purchasing devices, medical devices, and / or artificial intelligence-enabled devices). Aspects can be implemented in chip-level components, modular components, non-modular components, non-chip-level components, device-level components, and / or system-level components. Devices incorporating the described aspects and features may include additional components and features for the implementation and practice of the claimed and described aspects. For example, the transmission and reception of wireless signals may include one or more components for analog and digital applications (e.g., hardware components including antennas, radio frequency (RF) chains, power amplifiers, modulators, buffers, processors, interleavers, adders, and / or summers). It is contemplated that aspects described herein may be practiced in a wide variety of devices, components, systems, distributed configurations, and / or end-user devices of various sizes, shapes, and configurations. [Brief description of the drawings]

[0025]

[0025] In order that the above-listed features of the present disclosure may be understood in detail, a more detailed description, briefly summarized above, may be obtained by referring to the embodiments, some of which are shown in the attached drawings. However, it should be noted that the attached drawings show only some typical embodiments of the present disclosure, and therefore should not be considered as limiting its scope, since the present description may allow other equally effective embodiments. The same reference numbers in different drawings may identify the same or similar elements. [Figure 1]

[0026] FIG. 1 illustrates an example of a wireless network in accordance with the present disclosure. [Diagram 2]

[0027] FIG. 1 illustrates an example of a base station communicating with user equipment (UE) in a wireless network in accordance with the present disclosure. [Diagram 3]

[0028] FIG. 1 illustrates an example of using beams for communication between a base station and a UE in accordance with the present disclosure. [Figure 4]

[0029] FIG. 2 illustrates an example of subbands in a wideband channel in accordance with the present disclosure. [Diagram 5]

[0030] FIG. 13 illustrates an example associated with using a transmission configuration indicator (TCI) state for a subband in accordance with the present disclosure. [Figure 6] FIG. 13 illustrates an example associated with using a transmission configuration indicator (TCI) state for a subband in accordance with the present disclosure. [Figure 7]

[0031] FIG. 2 illustrates an example process associated with using TCI states for a subband in accordance with the present disclosure. [Figure 8] FIG. 2 illustrates an example process associated with using TCI states for a subband in accordance with the present disclosure. [Figure 9] FIG. 2 illustrates an example process associated with using TCI states for a subband in accordance with the present disclosure. [Figure 10] FIG. 2 illustrates an example process associated with using TCI states for a subband in accordance with the present disclosure. [Figure 11]

[0032] FIG. 1 is a diagram of an example apparatus for wireless communication in accordance with the present disclosure. [Figure 12] FIG. 1 is a diagram of an example apparatus for wireless communication in accordance with the present disclosure. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0026]

[0033] Various aspects of the present disclosure are described more fully below with reference to the accompanying drawings. However, the present disclosure may be embodied in many different forms and should not be construed as limited to any specific structure or function presented throughout the present disclosure. Rather, these aspects are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art. Those skilled in the art should understand that the scope of the present disclosure encompasses any aspect of the present disclosure disclosed herein, whether implemented independently of or in combination with any other aspect of the present disclosure. For example, an apparatus may be implemented or a method may be practiced using any number of the aspects described herein. In addition, the scope of the present disclosure is intended to encompass such an apparatus or method that is practiced using other structures, functions, or structures and functions in addition to or other than the various aspects of the disclosure described herein. It should be understood that any aspect of the disclosure disclosed herein may be embodied by one or more elements of a claim.

[0027]

[0034] Several aspects of a communication system are now presented with reference to various apparatus and techniques that are described in the detailed description that follows and illustrated in the accompanying drawings by various blocks, modules, components, circuits, steps, processes, algorithms, etc. (collectively referred to as "elements"). These elements may be implemented using hardware, software, or a combination thereof. Whether such elements are implemented as hardware or software depends on the particular application and design constraints imposed on the overall system.

[0028]

[0035] Although aspects may be described herein using terminology commonly associated with 5G or New Radio (NR) radio access technologies (RATs), aspects of the disclosure may apply to other RATs, such as 3G RATs, 4G RATs, and / or RATs beyond 5G (e.g., 6G).

[0029]

[0036] FIG. 1 illustrates an example of a wireless network 100 in accordance with the present disclosure. The wireless network 100 may be or include elements of a 5G (e.g., NR) network and / or a 4G (e.g., Long Term Evolution (LTE)) network, among other examples. The wireless network 100 may include one or more base stations 110 (shown as BS 110a, BS 110b, BS 110c, and BS 110d), a user equipment (UE) 120 or multiple UEs 120 (shown as UE 120a, UE 120b, UE 120c, UE 120d, and UE 120e), and / or other network entities. The base stations 110 are entities that communicate with the UEs 120. The base stations 110 (sometimes referred to as BSs) may include, for example, NR base stations, LTE base stations, Node Bs, eNBs (e.g., in 4G), gNBs (e.g., in 5G), access points, and / or transmit / receive points (TRPs). Each base station 110 may provide communication coverage for a particular geographic area. In the Third Generation Partnership Project (3GPP), the term "cell" can refer to the coverage area of ​​a base station 110 and / or a base station subsystem that serves that coverage area, depending on the context in which the term is used.

[0030]

[0037] A base station 110 may provide communication coverage for a macro cell, a pico cell, a femto cell, and / or another type of cell. A macro cell may cover a relatively large geographic area (e.g., a few kilometers in radius) and may allow unrestricted access by UEs 120 with a service subscription. A pico cell may cover a relatively small geographic area and may allow unrestricted access by UEs 120 with a service subscription. A femto cell may cover a relatively small geographic area (e.g., a home) and may allow restricted access by UEs 120 with an association with a femto cell (e.g., UEs 120 in a closed subscriber group (CSG)). A base station 110 for a macro cell may be referred to as a macro base station. A base station 110 for a pico cell may be referred to as a pico base station. A base station 110 for a femto cell may be referred to as a femto base station or an indoor base station. 1, BS 110a may be a macro base station for a macro cell 102a, BS 110b may be a pico base station for a pico cell 102b, and BS 110c may be a femto base station for a femto cell 102c. A base station may support one or more (e.g., three) cells.

[0031]

[0038] In some examples, the cells may not necessarily be stationary and the geographic area of ​​the cells may move according to the location of the base station 110 that is mobile (e.g., a mobile base station). In some examples, the base stations 110 may be interconnected to each other and / or to one or more other base stations 110 or network nodes (not shown) in the wireless network 100 through various types of backhaul interfaces, such as direct physical connections or virtual networks, using any suitable transport network.

[0032]

[0039] The wireless network 100 may include one or more relay stations. A relay station is an entity that may receive a transmission of data from an upstream station (e.g., a base station 110 or a UE 120) and send a transmission of data to a downstream station (e.g., a UE 120 or a base station 110). A relay station may be a UE 120 that may relay a transmission for another UE 120. In the example shown in FIG. 1, a BS 110d (e.g., a relay base station) may communicate with a BS 110a (e.g., a macro base station) and a UE 120d to facilitate communication between the BS 110a and the UE 120d. A base station 110 that relays communication may be referred to as a relay station, a relay base station, a relay, etc.

[0033]

[0040] The wireless network 100 may be a heterogeneous network that includes different types of base stations 110, such as macro base stations, pico base stations, femto base stations, relay base stations, etc. These different types of base stations 110 may have different transmit power levels, different coverage areas, and / or different susceptibility to interference in the wireless network 100. For example, a macro base station may have a high transmit power level (e.g., 5-40 watts), while the pico base stations, femto base stations, and relay base stations may have lower transmit power levels (e.g., 0.1-2 watts).

[0034]

[0041] A network controller 130 may couple to or communicate with a set of base stations 110 and may provide coordination and control for these base stations 110. The network controller 130 may communicate with the base stations 110 via backhaul communication links. The base stations 110 may communicate with each other directly or indirectly via wireless or wired backhaul communication links.

[0035]

[0042] The UEs 120 may be dispersed throughout the wireless network 100, and each UE 120 may be fixed or mobile. The UEs 120 may include, for example, an access terminal, a terminal, a mobile station, and / or a subscriber unit. The UEs 120 may be a mobile phone (e.g., a smartphone), a personal digital assistant (PDA), a wireless modem, a wireless communication device, a handheld device, a laptop computer, a cordless phone, a wireless local loop (WLL) station, a tablet, a camera, a gaming device, a netbook, a smartbook, an ultrabook, a medical device, a biometric device, a wearable device (e.g., a smart watch, smart clothing, smart glasses, a smart wristband, smart jewelry (e.g., a smart ring or a smart bracelet)), an entertainment device (e.g., a music device, a video device, and / or a satellite radio), a vehicle component or sensor, a smart meter / sensor, industrial manufacturing equipment, a global positioning system device, and / or any other suitable device configured to communicate over a wireless medium.

[0036]

[0043] Some UEs 120 may be considered as machine type communication (MTC) UEs, or evolved or enhanced machine type communication (eMTC) UEs. MTC UEs and / or eMTC UEs may include, for example, a robot, a drone, a remote device, a sensor, a meter, a monitor, and / or a location tag that may communicate with a base station, another device (e.g., a remote device), or some other entity. Some UEs 120 may be considered as Internet of Things (IoT) devices and / or may be implemented as NB-IoT (narrowband IoT) devices. Some UEs 120 may be considered as customer premises equipment. The UEs 120 may be included within a housing that houses components of the UEs 120, such as a processor component and / or a memory component. In some examples, the processor component and the memory component may be coupled to each other. For example, the processor component (e.g., one or more processors) and the memory component (e.g., a memory) may be operatively coupled, communicatively coupled, electronically coupled, and / or electrically coupled.

[0037]

[0044] In general, any number of wireless networks 100 may be deployed in a given geographic area. Each wireless network 100 may support a particular RAT and may operate on one or more frequencies. The RAT may be referred to as a radio technology, an air interface, etc. The frequencies may be referred to as a carrier, a frequency channel, etc. Each frequency may support a single RAT in a given geographic area to avoid interference between wireless networks of different RATs. In some cases, NR networks or 5G RAT networks may be deployed.

[0038]

[0045] In some examples, two or more UEs 120 (e.g., shown as UE 120a and UE 120e) may communicate directly (e.g., without using the base station 110 as an intermediary to communicate with each other) using one or more sidelink channels. For example, the UEs 120 may communicate using peer-to-peer (P2P) communication, device-to-device (D2D) communication, a vehicle-to-everything (V2X) protocol (which may include, e.g., a vehicle-to-vehicle (V2V) protocol, a vehicle-to-infrastructure (V2I) protocol, or a vehicle-to-pedestrian (V2P) protocol), and / or a mesh network. In such examples, the UEs 120 may perform scheduling operations, resource selection operations, and / or other operations described elsewhere herein as being performed by the base station 110.

[0039]

[0046] The devices of the wireless network 100 may communicate using an electromagnetic spectrum, which may be subdivided by frequency or wavelength into various classes, bands, channels, etc. For example, the devices of the wireless network 100 may communicate using one or more operating bands. In 5G NR, two initial operating bands have been identified as frequency range designations FR1 (410 MHz to 7.125 GHz) and FR2 (24.25 GHz to 52.6 GHz). It should be understood that FR1 is often referred to (interchangeably) as a "sub-6 GHz" band in various documents and articles, although a portion of FR1 is above 6 GHz. A similar nomenclature issue may arise with respect to FR2, which is often referred to (interchangeably) as a "mmWave" band in documents and articles, even though it is different from the extremely high frequency (EHF) band (30 GHz to 300 GHz) identified as a "mmWave" band by the International Telecommunications Union (ITU).

[0040]

[0047] Frequencies between FR1 and FR2 are often referred to as mid-band frequencies. Recent 5G NR studies have identified the operating bands for these mid-band frequencies as frequency range designation FR3 (7.125 GHz to 24.25 GHz). Frequency bands that fall within FR3 may inherit FR1 and / or FR2 characteristics, and thus may in effect extend the features of FR1 and / or FR2 to the mid-band frequencies. Additionally, higher frequency bands are currently being explored to extend 5G NR operation beyond 52.6 GHz. For example, three higher operating bands have been identified as frequency range designations FR4a or FR4-1 (52.6 GHz to 71 GHz), FR4 (52.6 GHz to 114.25 GHz), and FR5 (114.25 GHz to 300 GHz). Each of these higher frequency bands falls within the EHF band.

[0041]

[0048] With the above examples in mind, it should be understood that unless otherwise specified, terms such as "sub-6 GHz" as used herein may broadly refer to frequencies that may be below 6 GHz, may be within FR1, or may include mid-band frequencies. Additionally, unless otherwise specified, it should be understood that terms such as "mmWave" as used herein may broadly refer to frequencies that may be within FR2, FR4, FR4-a or FR4-1, and / or FR5, may include mid-band frequencies, or may be within the EHF band. It is contemplated that the frequencies included in these operating bands (e.g., FR1, FR2, FR3, FR4, FR4-a, FR4-1, and / or FR5) may change, and the techniques described herein are applicable to those changed frequency ranges.

[0042]

[0049] The UE 120 may receive downlink transmissions (e.g., from the base station 110) using a transmission configuration such as a transmission configuration indicator (TCI) state (e.g., represented by a TCI-State data structure as defined in the 3GPP specification and / or another standard). For example, the base station 110 and the UE 120 may be configured for beamformed communications, where the base station 110 may transmit in the direction of the UE 120 using a directional BS transmit beam, and the UE 120 may receive the transmission using a directional UE receive beam. Each BS transmit beam may have an associated beam ID, beam direction, or beam symbol, among other examples. Also, a downlink beam, such as a BS transmit beam or a UE receive beam, may be associated with a TCI state. The TCI state may indicate a directionality or characteristic of the downlink beam, such as one or more quasi-collocation (QCL) properties of the downlink beam. For example, the QCL properties may be indicated using a qcl-Type indicator in a QCL-Info data structure as defined in the 3GPP specification and / or another standard. The QCL properties may include, for example, Doppler shift, Doppler spread, average delay, delay spread, or spatial reception parameters, among other examples. In some aspects, the TCI state may be further associated with an antenna port, an antenna panel, and / or a TRP. The TCI state may be associated with one downlink reference signal set (e.g., synchronization signal block (SSB) and aperiodic, periodic, or semi-persistent channel state information reference signal (CSI-RS)) for different QCL types (e.g., QCL types for different combinations of Doppler shift, Doppler spread, average delay, delay spread, or spatial reception parameters, among other examples). For example, the downlink reference signals may be indicated using a referenceSignal indicator in the QCL-Info data structure, as defined in the 3GPP specifications and / or another standard. In the case where the QCL type indicates spatial reception parameters, the QCL type may correspond to analog receive beamforming parameters of the UE receive beam at the UE 120.

[0043]

[0050] The base station 110 may configure a set of TCI states for use on a physical downlink shared channel (PDSCH) and a subset of those TCI states for use on a physical downlink control channel (PDCCH). The base station 110 may use a radio resource control (RRC) message to provide a set of TCI states for the PDSCH and / or a subset of those TCI states for the PDCCH. For the PDSCH, the base station 110 may send a medium access control (MAC) layer control element (MAC-CE) to activate a subset of TCI states for use on the PDSCH and then schedule (e.g., using downlink control information (DCI)) a particular one of those activated TCI states for the PDSCH message. Similarly, for the PDCCH, the base station 110 may send a MAC-CE to activate one TCI state from the subset of TCI states for use on the PDCCH for the PDCCH message.

[0044]

[0051] In some aspects, the UE 120 may include a communications manager 140. As described in more detail elsewhere herein, the communications manager 140 may receive from the base station 110 a first RRC configuration message associated with a first subband included in the wideband channel between the UE 120 and the base station 110 and indicating a first set of TCI states to use on the first subband. The communications manager 140 may further receive from the base station 110 a second RRC configuration message associated with a second subband included in the wideband channel and indicating a second set of TCI states to use on the second subband. Alternatively, the communications manager 140 may receive from the base station 110 an RRC configuration message including at least a first list of first TCI states associated with the first subband and a second list of second TCI states associated with the second subband. The communications manager 140 may further receive an indication of the first subband and the second subband from the base station 110. Additionally or alternatively, communications manager 140 may perform one or more other operations described herein.

[0045]

[0052] Similarly, in some aspects, the base station 110 may include a communications manager 150. As described in more detail elsewhere herein, the communications manager 150 may transmit a first RRC configuration message to the UE 120 associated with a first subband included in the wideband channel between the UE 120 and the base station 110 and indicating a first set of TCI states to use on the first subband. The communications manager 150 may further transmit a second RRC configuration message to the UE 120 associated with a second subband included in the wideband channel and indicating a second set of TCI states to use on the second subband. Alternatively, the communications manager 150 may transmit an RRC configuration message to the UE 120 including at least a first list of first TCI states associated with the first subband and a second list of second TCI states associated with the second subband. The communications manager 150 may further transmit an indication of the first and second subbands to the UE 120. Additionally or alternatively, communications manager 150 may perform one or more other operations described herein.

[0046]

[0053] As noted above, Figure 1 is provided as an example. Other examples may differ from those described with respect to Figure 1.

[0047]

[0054] 2 illustrates an example base station 200 in communication with a UE 120 in a wireless network 100 in accordance with the present disclosure. The base station 110 may be equipped with a set of antennas 234a through 234t, such as T antennas, where T≧1. The UE 120 may be equipped with a set of antennas 252a through 252r, such as R antennas, where R≧1.

[0048]

[0055] At the base station 110, a transmit processor 220 may receive data destined for a UE 120 (or set of UEs 120) from a data source 212. The transmit processor 220 may select one or more modulation and coding schemes (MCSs) for the UE 120 based at least in part on one or more channel quality indicators (CQIs) received from the UE 120. The base station 110 may process (e.g., encode and modulate) data for the UE 120 based at least in part on the MCS(es) selected for the UE 120 and provide data symbols to the UE 120. The transmit processor 220 may process system information (e.g., for semi-static resource partitioning information (SRPI)) and control information (e.g., CQI requests, grants, and / or higher layer signaling) and provide overhead symbols and control symbols. The transmit processor 220 may generate reference symbols for a reference signal (e.g., a cell-specific reference signal (CRS) or a demodulation reference signal (DMRS)) and a synchronization signal (e.g., a primary synchronization signal (PSS) or a secondary synchronization signal (SSS)). The transmit (TX) multiple-input multiple-output (MIMO) processor 230 may perform spatial processing (e.g., precoding) on ​​the data symbols, control symbols, overhead symbols, and / or reference symbols, if applicable, and may provide a set of output symbol streams (e.g., T output symbol streams) to a corresponding set of modems 232 (e.g., T modems), denoted as modems 232a through 232t. For example, each output symbol stream may be provided to a modulator component (denoted as MOD) of modem 232. Each modem 232 may process a respective output symbol stream (e.g., for OFDM) using a respective modulator component to obtain an output sample stream. Each modem 232 may further process (eg, convert to analog, amplify, filter, and / or upconvert) the output sample stream using a respective modulator component to obtain a downlink signal.Modems 232a through 232t may transmit a set of downlink signals (eg, T downlink signals) via a corresponding set of antennas 234 (eg, T antennas) denoted as antennas 234a through 234t.

[0049]

[0056] At the UE 120, a set of antennas 252 (depicted as antennas 252a through 252r) may receive downlink signals from the base station 110 and / or other base stations 110 and may provide a set of received signals (e.g., R received signals) to a set of modems 254 (e.g., R modems) depicted as modems 254a through 254r. For example, each received signal may be provided to a demodulator component (depicted as DEMOD) of the modems 254. Each modem 254 may condition (e.g., filter, amplify, downconvert, and / or digitize) the received signal using a respective demodulator component to obtain input samples. Each modem 254 may further process the input samples (e.g., for OFDM) using the demodulator component to obtain received symbols. A MIMO detector 256 may obtain received symbols from the modems 254, perform MIMO detection on the received symbols, if applicable, and provide detected symbols. The receive processor 258 may process (e.g., demodulate and decode) the detected symbols, provide decoded data for the UE 120 to a data sink 260, and provide decoded control and system information to the controller / processor 280. The term "controller / processor" may refer to one or more controllers, one or more processors, or a combination thereof. The channel processor may determine a reference signal received power (RSRP) parameter, a received signal strength indicator (RSSI) parameter, a reference signal received quality (RSRQ) parameter, and / or a CQI parameter, among other examples. In some examples, one or more components of the UE 120 may be included within a housing 284.

[0050]

[0057] The network controller 130 may include a communication unit 294, a controller / processor 290, and a memory 292. The network controller 130 may include, for example, one or more devices in a core network. The network controller 130 may communicate with the base stations 110 via the communication unit 294.

[0051]

[0058] One or more antennas (e.g., antennas 234a-t and / or antennas 252a-r) may include or be contained within one or more antenna panels, one or more antenna groups, one or more sets of antenna elements, and / or one or more antenna arrays, among other examples. The antenna panels, antenna groups, sets of antenna elements, and / or antenna arrays may include one or more antenna elements (in a single housing or multiple housings), a set of coplanar antenna elements, a set of non-coplanar antenna elements, and / or one or more antenna elements coupled to one or more transmitting and / or receiving components, such as one or more of the components in FIG.

[0052]

[0059] On the uplink, at the UE 120, the transmit processor 264 may receive and process data from the data source 262 and control information from the controller / processor 280 (e.g., for reports including RSRP, RSSI, RSRQ, and / or CQI). The transmit processor 264 may generate reference symbols for one or more reference signals. The symbols from the transmit processor 264 may be precoded by the TX MIMO processor 266, if applicable, further processed by the modem 254 (e.g., for DFT-s-OFDM or CP-OFDM), and transmitted to the base station 110. In some examples, the modem 254 of the UE 120 may include a modulator and demodulator. In some examples, the UE 120 includes a transceiver. The transceiver may include any combination of the antenna(s) 252, the modem 254, the MIMO detector 256, the receive processor 258, the transmit processor 264, and / or the TX MIMO processor 266. The transceiver may be used by a processor (eg, controller / processor 280) and memory 282 to implement aspects of any of the methods described herein (eg, with reference to Figures 5-12).

[0053]

[0060] At the base station 110, uplink signals from the UE 120 and / or other UEs may be received by an antenna 234, processed by a modem 232 (e.g., a demodulator component of the modem 232, denoted as DEMOD), detected by a MIMO detector 236, if applicable, and further processed by a receive processor 238 to obtain decoded data and control information sent by the UE 120. The receive processor 238 may provide the decoded data to a data sink 239 and the decoded control information to a controller / processor 240. The base station 110 may include a communication unit 244 and may communicate with the network controller 130 via the communication unit 244. The base station 110 may include a scheduler 246 for scheduling one or more UEs 120 for downlink and / or uplink communications. In some examples, the modem 232 of the base station 110 may include a modulator and a demodulator. In some examples, the base station 110 includes a transceiver. The transceiver may include any combination of antenna(s) 234, modem(s) 232, MIMO detector 236, receive processor 238, transmit processor 220, and / or TX MIMO processor 230. The transceiver may be used by a processor (e.g., controller / processor 240) and memory 242 to implement aspects of any of the methods described herein (e.g., with reference to FIGS. 5-12).

[0054]

[0061] The controller / processor 240 of the base station 110, the controller / processor 280 of the UE 120, and / or any other component(s) of FIG. 2 may implement one or more techniques associated with the use of TCI states for subbands, as described in more detail elsewhere herein. For example, the controller / processor 240 of the base station 110, the controller / processor 280 of the UE 120, and / or any other component(s) of FIG. 2 may perform or direct the operation of, for example, process 700 of FIG. 7, process 800 of FIG. 8, process 900 of FIG. 9, process 1000 of FIG. 10, and / or other processes as described herein. The memory 242 and the memory 282 may store data and program codes for the base station 110 and the UE 120, respectively. In some examples, the memory 242 and / or the memory 282 may include a non-transitory computer-readable medium that stores one or more instructions (e.g., code and / or program code) for wireless communication. For example, the one or more instructions, when executed (e.g., immediately or after being compiled, translated, and / or interpreted) by one or more processors of the base station 110 and / or the UE 120, may cause the one or more processors, the UE 120, and / or the base station 110 to perform or direct operations, such as process 700 of Figure 7, process 800 of Figure 8, process 900 of Figure 9, process 1000 of Figure 10, and / or other processes as described herein. In some examples, executing the instructions may include executing the instructions, converting the instructions, compiling the instructions, and / or interpreting the instructions, among other examples.

[0055]

[0062] In some aspects, a UE (e.g., UE 120 and / or device 1100 of FIG. 11) may include means for receiving a first RRC configuration message from a base station (e.g., base station 110 and / or device 1200 of FIG. 12) associated with a first subband comprised in a wideband channel between the UE and the base station and indicating a first set of TCI states to use on the first subband, and / or means for receiving a second RRC configuration message from the base station associated with a second subband comprised in the wideband channel and indicating a second set of TCI states to use on the second subband. The means for causing the UE to perform operations described herein may include, for example, one or more of communications manager 140, antenna 252, modem 254, MIMO detector 256, receive processor 258, transmit processor 264, TX MIMO processor 266, controller / processor 280, or memory 282. Alternatively, the UE may include means for receiving an RRC configuration message from the base station including at least a first list of a first TCI state associated with the first subband and a second list of a second TCI state associated with the second subband, and / or means for receiving an indication of the first subband and the second subband from the base station. The means for causing the UE to perform operations described herein may include, for example, one or more of the communications manager 140, the antenna 252, the modem 254, the MIMO detector 256, the receive processor 258, the transmit processor 264, the TX MIMO processor 266, the controller / processor 280, or the memory 282.

[0056]

[0063] In some aspects, a base station (e.g., base station 110 and / or device 1200 of FIG. 12) may include means for transmitting a first RRC configuration message to a UE (e.g., UE 120 and / or device 1100 of FIG. 11) associated with a first subband included in a wideband channel between the UE and the base station and indicating a first set of TCI states to use on the first subband, and / or means for transmitting a second RRC configuration message to the UE associated with a second subband included in the wideband channel and indicating a second set of TCI states to use on the second subband. The means for the base station to perform the operations described herein may include, for example, one or more of communications manager 150, transmit processor 220, TX MIMO processor 230, modem 232, antenna 234, MIMO detector 236, receive processor 238, controller / processor 240, memory 242, or scheduler 246. Alternatively, the base station may include means for transmitting an RRC configuration message to the UE including at least a first list of a first TCI state associated with the first subband and a second list of a second TCI state associated with the second subband, and / or means for transmitting an indication of the first subband and the second subband to the UE. The means for the base station to perform the operations described herein may include, for example, one or more of the communications manager 150, the transmit processor 220, the TX MIMO processor 230, the modem 232, the antennas 234, the MIMO detector 236, the receive processor 238, the controller / processor 240, the memory 242, or the scheduler 246.

[0057]

[0064] 2 are shown as separate components, the functionality described above with respect to the blocks may be implemented in a single hardware, software, or combination of components, or in various combinations of components. For example, functionality described with respect to transmit processor 264, receive processor 258, and / or TX MIMO processor 266 may be performed by or under the control of controller / processor 280.

[0058]

[0065] As noted above, Figure 2 is provided as an example. Other examples may differ from those described with respect to Figure 2.

[0059]

[0066] 3 is a diagram illustrating an example 300 of using beams for communication between a base station and a UE in accordance with the present disclosure. As shown in FIG. 3, a base station 110 and a UE 120 may communicate with each other.

[0060]

[0067] The base station 110 may transmit to a UE 120 located within the coverage area of ​​the base station 110. The base station 110 and the UE 120 may be configured for beamformed communications, where the base station 110 may transmit in the direction of the UE 120 using a directional BS transmit beam, and the UE 120 may receive the transmission using a directional UE receive beam. Each BS transmit beam may have an associated beam ID, beam direction, or beam symbol, among other examples. The base station 110 may transmit downlink communications via one or more BS transmit beams 305.

[0061]

[0068] The UE 120 may attempt to receive downlink transmissions via one or more UE receive beams 310, which may be configured with different beamforming parameters in the receive circuitry of the UE 120. The UE 120 may identify a particular BS transmit beam 305, denoted as BS transmit beam 305-A, and a particular UE receive beam 310, denoted as UE receive beam 310-A, that provide relatively favorable performance (e.g., have best channel quality of different measured combinations of BS transmit beams 305 and UE receive beams 310). In some examples, the UE 120 may transmit an indication of which BS transmit beam 305 is identified by the UE 120 as a preferred BS transmit beam that the base station 110 may select for transmission to the UE 120. The UE 120 may thus achieve and maintain a beam pair link (BPL) (e.g., a combination of a BS transmitting beam 305-A and a UE receiving beam 310-A) with the base station 110 for downlink communications, and the BPL may be further improved and maintained in accordance with one or more established beam improvement procedures.

[0062]

[0069] As described in connection with FIG. 1, a downlink beam, such as a BS transmit beam 305 or a UE receive beam 310, may be associated with a TCI state. The TCI state may indicate a directivity or characteristic of the downlink beam, such as one or more QCL properties of the downlink beam. The QCL properties may include, for example, Doppler shift, Doppler spread, average delay, delay spread, or spatial reception parameters, among other examples. In some examples, each BS transmit beam 305 may be associated with an SSB, and the UE 120 may indicate a preferred BS transmit beam 305 by transmitting an uplink transmission in resources of the SSB associated with the preferred BS transmit beam 305. A particular SSB may have an associated TCI state (e.g., for an antenna port or for beamforming). The base station 110 may indicate a downlink BS transmit beam 305 based at least in part on the antenna port QCL properties, which may be indicated by the TCI state, in some examples. The TCI state may be associated with one downlink reference signal set (e.g., SSB and aperiodic, periodic, or semi-persistent CSI-RS) for different QCL types (e.g., QCL types for different combinations of Doppler shift, Doppler spread, average delay, delay spread, or spatial reception parameters, among other examples). In the case where the QCL type indicates spatial reception parameters, the QCL type may correspond to analog receive beamforming parameters of the UE receive beam 310 at the UE 120. Thus, the UE 120 may select a corresponding UE receive beam 310 from the set of BPLs based at least in part on the base station 110 indicating the BS transmit beam 305 via the TCI indication.

[0063]

[0070] The base station 110 may maintain a set of activated TCI states for downlink shared channel transmissions and a set of activated TCI states for downlink control channel transmissions. The set of activated TCI states for downlink shared channel transmissions may correspond to beams that the base station 110 uses for downlink transmissions on a PDSCH. The set of activated TCI states for downlink control channel communications may correspond to beams that the base station 110 may use for downlink transmissions on a physical downlink control channel (PDCCH) or in a control resource set (CORESET). The UE 120 may also maintain a set of activated TCI states for receiving downlink shared channel transmissions and CORESET transmissions. If a TCI state is activated for the UE 120, the UE 120 may have one or more antenna configurations based at least in part on the TCI state, and the UE 120 may not need to reconfigure antennas or antenna weighting settings. In some examples, the set of activated TCI states for UE 120 (eg, activated PDSCH TCI states and activated CORESET TCI states) may be configured by a configuration message, such as an RRC message.

[0064]

[0071] Similarly, for uplink communications, the UE 120 may transmit in the direction of the base station 110 using a directional UE transmit beam, and the base station 110 may receive the transmission using a directional BS receive beam. Each UE transmit beam may have an associated beam ID, beam direction, or beam symbol, among other examples. The UE 120 may transmit uplink communications via one or more UE transmit beams 315.

[0065]

[0072] The base station 110 may receive uplink transmissions via one or more BS receive beams 320. The base station 110 may identify a particular UE transmit beam 315, denoted as UE transmit beam 315-A, and a particular BS receive beam 320, denoted as BS receive beam 320-A, that provide relatively favorable performance (e.g., have the best channel quality of different measured combinations of UE transmit beam 315 and BS receive beam 320). In some examples, the base station 110 may transmit an indication of which UE transmit beam 315 is identified by the base station 110 as a preferred UE transmit beam that the base station 110 may select for transmissions from the UE 120. The UE 120 and base station 110 may thus achieve and maintain a BPL (e.g., a combination of UE transmit beam 315-A and BS receive beam 320-A) for uplink communications, and the BPL may be further improved and maintained pursuant to one or more established beam improvement procedures. An uplink beam, such as a UE transmit beam 315 or a BS receive beam 320, may be associated with a spatial relationship that may indicate a directivity or characteristic of the uplink beam, similar to one or more of the QCL properties described above.

[0066]

[0073] As noted above, Figure 3 is provided as an example. Other examples may differ from what is described with respect to Figure 3.

[0067]

[0074] 4 is a diagram illustrating an example 400 of subbands in a wideband channel in accordance with the present disclosure. The example 400 includes a set of frequency resources used on a wideband channel (e.g., between a UE and a base station). The wideband channel may include a downlink channel, such as a PDSCH or PDCCH, or an uplink channel, such as a Physical Uplink Shared Channel (PUSCH) or a Physical Uplink Control Channel (PUCCH).

[0068]

[0075] A set of frequency resources may be included in or correspond to a bandwidth portion (BWP). As used herein, a "bandwidth portion" or "BWP" may refer to a contiguous set of physical resource blocks (PRBs), where each PRB includes a set of frequencies corresponding to one or more subcarriers. A "subcarrier" may refer to a frequency that is based at least in part on a "carrier" frequency, where the subcarriers may be aggregated to carry information wirelessly (e.g., using OFDM symbols and / or other RF symbols).

[0069]

[0076] As further shown in Figure 4, a UE and a base station may use one or more subbands when communicating over a wideband channel. As used herein, a "subband" may refer to a subset of frequencies within a larger set of frequencies over a "band." A subband is smaller than a BWP and includes a subset of the set of frequency resources used over a wideband channel.

[0070]

[0077] Thus, in example 400, the wideband channel is associated with a number of subbands (e.g., represented by N in example 400) (shown in FIG. 4 as subband 401-1, subband 401-2, ..., subband 401-N). Each subband may be centered on a frequency. For example, as shown in FIG. 4, subband 401-1 is centered on a frequency represented by f1, subband 401-2 is centered on a frequency represented by f2, and similarly, subband 401-N is centered on a frequency represented by f3, and so on. N The frequency is centered at a frequency represented by

[0071]

[0078] When using subbands, UEs and base stations are more susceptible to beamsquetting. For example, when a base station is transmitting on a subband but drifts away from the center frequency associated with that subband, the direction associated with the beamformed communication on that subband may shift significantly. Beamsquetting results in reduced reliability and / or quality of communication between the UE and the base station. As a result, the UE and base station are more likely to drop communications and thus use retransmissions (possibly multiple retransmissions), which wastes power, processing resources, and network resources at the UE and base station. Retransmissions also increase interference with other nearby devices (such as other UEs in the same serving cell or in neighboring cells).

[0072]

[0079] In 3GPP specifications (and other standards), a TCI state is generally associated with a wideband channel. For example, a TCI state may be associated with a BWP. Thus, when a UE or a base station is transmitting on a subband, the UE or the base station may apply a TCI state optimized for a different subband associated with the wideband channel, respectively. As a result, beam squint is highly likely to occur, which results in wasted power and processing resources in the UE and the base station, as described above.

[0073]

[0080] Some techniques and apparatuses described herein allow a base station (e.g., base station 110) to associate different subbands with different TCI states using an RRC configuration message. As a result, the base station 110 and / or the UE (e.g., UE 120) reduce beam squint during transmission by applying a subband-optimized TCI state. Thus, the reliability and / or quality of communication between the UE 120 and the base station 110 is improved, and as a result, the UE 120 and the base station 110 are less likely to drop communication and use retransmissions. Using fewer retransmissions saves power and processing resources in the UE 120 and the base station 110. Using fewer retransmissions also reduces interference with other nearby devices (such as other UEs in the same serving cell or in neighboring cells).

[0074]

[0081] As noted above, Figure 4 is provided as an example. Other examples may differ from what is described with respect to Figure 4.

[0075]

[0082] 5 is a diagram illustrating an example 500 associated with using TCI states for subbands in accordance with the present disclosure. As shown in FIG. 5, a base station 110 and a UE 120 may communicate with each other (e.g., over a wireless communication network such as the wireless network 100 of FIG. 1).

[0076]

[0083] As indicated by reference numeral 505-1, the base station 110 may transmit, and the UE 120 may receive, a first RRC configuration message associated with a first subband included in a wideband channel between the UE 120 and the base station 110 (e.g., as described in connection with FIG. 4) and indicating a first set of TCI states to use on the first subband.

[0077]

[0084] In some aspects, base station 110 may transmit an RRCReconfigPerSubBand data structure (e.g., as defined in the 3GPP specifications and / or another standard) in which each TCI-State in the Tci-StatesPDCCH-ToAddList data structure (e.g., as defined in the 3GPP specifications and / or another standard) is associated with a first subband. For example, UE 120 may determine that the TCI states indicated in the Tci-StatesPDCCH-ToAddList data structure are associated with the first subband because the RRC configuration message is associated with the first subband. Thus, the first set of TCI states may include one or more TCI states associated with a control channel, such as a PDCCH.

[0078]

[0085] Additionally or alternatively, each TCI-State indicated in the Tci-StatesToAddModList data structure (e.g., as defined in the 3GPP specifications and / or another standard) may be associated with a first subband. For example, UE 120 may determine that the TCI states indicated in the Tci-StatesToAddModList data structure are associated with the first subband because the RRC configuration message is associated with the first subband. Thus, the first set of TCI states may include one or more TCI states associated with a data channel, such as a PDSCH.

[0079]

[0086] As indicated by reference numeral 505-2, the base station 110 may transmit, and the UE 120 may receive, a second RRC configuration message associated with a second subband included in the wideband channel and indicating a second set of TCI states to use on the second subband.

[0080]

[0087] In some aspects, base station 110 may transmit an additional RRCReconfigPerSubBand data structure (e.g., as defined in the 3GPP specifications and / or other standards) in which each TCI-State indicated in the Tci-StatesPDCCH-ToAddList data structure (e.g., as defined in the 3GPP specifications and / or other standards) is associated with a second subband. For example, UE 120 may determine that the TCI state indicated in the Tci-StatesPDCCH-ToAddList data structure is associated with the second subband because the RRC configuration message is associated with the second subband. Thus, the second set of TCI states may include one or more TCI states associated with a control channel, such as the PDCCH.

[0081]

[0088] Additionally or alternatively, each TCI-State indicated in the Tci-StatesToAddModList data structure (e.g., as defined in the 3GPP specifications and / or another standard) may be associated with a second subband. For example, UE 120 may determine that the TCI state indicated in the Tci-StatesToAddModList data structure is associated with the second subband because the RRC configuration message is associated with the second subband. Thus, the second set of TCI states may include one or more TCI states associated with a data channel, such as a PDSCH.

[0082]

[0089] The base station 110 may similarly transmit one or more additional RRC configuration messages, each associated with a different sub-band of the one or more additional sub-bands included in the wideband channel. For example, there may be a maximum number of sub-bands (e.g., represented by N in FIG. 5) such that the base station 110 transmits a maximum of N RRC configuration messages (e.g., as indicated by reference numeral 505-N). The maximum number of sub-bands may be programmed (and / or otherwise pre-configured) in the base station 110 and the UE 120 (e.g., according to a 3GPP specification and / or another standard). Additionally or alternatively, the base station 110 may determine the maximum number of sub-bands and may indicate the determined maximum number of sub-bands to the UE 120. In a combination example, the base station 110 may select the maximum number of sub-bands from a plurality of possible maximum numbers programmed (and / or otherwise pre-configured) in the base station 110 and the UE 120 (e.g., according to a 3GPP specification and / or another standard).

[0083]

[0090] In some aspects, the number of TCI states indicated by each RRC configuration message does not exceed a maximum number of TCI states. For example, the maximum number of TCI states may be represented by K, such that each RRC configuration message does not indicate more than K states. The maximum value may apply to all TCI states included in the RRC configuration message (e.g., all TCI states indicated in the Tci-StatesPDCCH-ToAddList data structure, the Tci-StatesToAddModList data structure, or a combination thereof). Alternatively, the maximum value may apply separately to TCI states associated with data channels and TCI states associated with control channels (e.g., separately to TCI states indicated in the Tci-StatesPDCCH-ToAddList data structure and to TCI states indicated in the Tci-StatesToAddModList data structure).

[0084]

[0091] The maximum number of TCI states may be programmed (and / or otherwise preconfigured) into base station 110 and UE 120 (e.g., according to a 3GPP specification and / or another standard). Additionally or alternatively, base station 110 may determine the maximum number of TCI states and may indicate the determined maximum number of TCI states to UE 120. In a combined example, base station 110 may select the maximum number of TCI states from multiple possible maximum numbers programmed (and / or otherwise preconfigured) into base station 110 and UE 120 (e.g., according to a 3GPP specification and / or another standard).

[0085]

[0092] As indicated by reference numeral 510, the base station 110 may transmit, and the UE 120 may receive, a control element (e.g., MAC-CE) indicating a subset of the first set of TCI states to use on the first subband. For example, the MAC-CE may indicate a maximum number of TCI states (e.g., represented by J) or less from a Tci-StatesToAddModList data structure in an RRCReconfigPerSubBand data structure associated with the first subband. The 3GPP specification currently uses J=8, but a smaller maximum value (e.g., 7, 6, etc.) may be used, or a larger maximum value (e.g., 9, 10, etc.) may be used. Thus, the UE 120 may determine that the TCI state(s) indicated in the control element are associated with the first subband because the corresponding RRC configuration message is associated with the first subband. Thus, the subset of the first set of TCI states may be associated with a data channel, such as a PDSCH. In another example, the MAC-CE may indicate one TCI state from the Tci-StatesPDCCH-ToAddList data structure in the RRCReconfigPerSubBand data structure associated with the first subband. Thus, the UE 120 may determine that the TCI state indicated in the control element is associated with the first subband because the corresponding RRC configuration message is associated with the first subband. Thus, a subset of the first set of TCI states may be associated with a control channel, such as the PDCCH.

[0086]

[0093] Alternatively, the base station 110 may transmit, and the UE 120 may receive, a control element (e.g., MAC-CE) indicating a first set of TCI states, a second set of TCI states, or a subset of a combination thereof, to use on the first subband or the second subband. For example, an RRC configuration message associated with the first subband and an RRC configuration message associated with the second subband may both indicate the same set of TCI states in the Tci-StatesPDCCH-ToAddList data structure and / or the Tci-StatesToAddModList data structure. Thus, the TCI state(s) indicated by the control element may be at least partially subband independent.

[0087]

[0094] The base station 110 may similarly transmit a control element indicating a subset of the TCI states to use on other subbands.

[0088]

[0095] In an aspect in which the control element indicates more than one TCI state, base station 110 may transmit, and UE 120 may receive, control information (e.g., DCI) indicating a TCI state in a subset of the first set of TCI states for use on the first subband, as indicated by reference numeral 515. For example, the DCI (e.g., DCI format 1_1 as defined by the 3GPP specifications and / or another standard) may indicate the TCI state using a codepoint associated with the TCI state from the control element. Thus, UE 120 may determine that the TCI state indicated in the control information is associated with the first subband because the corresponding RRC configuration message that set the TCI state is associated with the first subband.

[0089]

[0096] In aspects where the TCI state(s) indicated by the control element are at least partially subband independent (e.g., as described with respect to reference numeral 510), the control information may further indicate the first subband. For example, the DCI (e.g., DCI format 1_1 as defined by the 3GPP specifications and / or other standards) may include a field indicating a first subband of multiple subbands configured for the UE 120.

[0090]

[0097] Base station 110 may similarly transmit control information indicating the TCI status for use on other subbands.

[0091]

[0098] As indicated by reference numeral 520, the base station and the UE 120 may communicate using the TCI state (e.g., as indicated by control information and / or a control element). For example, the UE 120 may receive data or other signals using the TCI state (e.g., on a PDSCH, a PDCCH, and / or another downlink channel). Alternatively, the base station 110 may receive data or other signals using the TCI state (e.g., on a PUSCH, a PUCCH, and / or another uplink channel).

[0092]

[0099] By using the technique described in connection with FIG. 5, the base station 110 associates different subbands with different TCI states using an RRC configuration message. As a result, the base station 110 and / or the UE 120 reduce beam squint during transmission by applying subband-optimized TCI states. Thus, the reliability and / or quality of communication between the UE 120 and the base station 110 is improved, so that the UE 120 and the base station 110 are less likely to drop communication and use retransmissions. Using fewer retransmissions saves power and processing resources at the UE 120 and the base station 110. Using fewer retransmissions also reduces interference with other nearby devices (such as other UEs in the same serving cell or in neighboring cells).

[0093]

[0100] As noted above, Figure 5 is provided as an example. Other examples may differ from what is described with respect to Figure 5.

[0094]

[0101] 6 is a diagram illustrating an example 600 associated with using TCI states for subbands in accordance with the present disclosure. As shown in FIG. 6, a base station 110 and a UE 120 may communicate with each other (e.g., over a wireless communication network such as the wireless network 100 of FIG. 1).

[0095]

[0102] As indicated by reference numeral 605, base station 110 may transmit, and UE 120 may receive, an RRC configuration message that includes at least a first list of first TCI states associated with a first subband included in a wideband channel between UE 120 and base station 110 (e.g., as described in connection with FIG. 4 ) and a second list of second TCI states associated with a second subband included in the wideband channel.

[0096]

[0103] In some aspects, base station 110 may transmit an RRCReconfig data structure (e.g., defined in a 3GPP specification and / or another standard) that includes a first Tci-StatesPDCCH-ToAddListPerSB-0 data structure associated with a first subband (e.g., defined in a 3GPP specification and / or another standard) and a second Tci-StatesPDCCH-ToAddListPerSB-1 data structure associated with a second subband (e.g., defined in a 3GPP specification and / or another standard). For example, UE 120 may determine that a first list of TCI states indicated in the Tci-StatesPDCCH-ToAddListPerSB-0 data structure is associated with the first subband because the data structure is associated with the first subband. Thus, the first list of TCI states may include one or more TCI states associated with a control channel, such as a PDCCH. Similarly, UE 120 may determine that the second list of TCI states indicated in the Tci-StatesPDCCH-ToAddListPerSB-1 data structure is associated with the second subband because the data structure is associated with the second subband. Thus, the second list of TCI states may include one or more TCI states associated with a control channel, such as a PDCCH.

[0097]

[0104] Additionally or alternatively, the RRC configuration message may include a first Tci-StatesToAddModListPerSB-0 data structure (e.g., as defined in the 3GPP specifications and / or another standard) associated with the first subband and a second Tci-StatesToAddModListPerSB-1 data structure (e.g., as defined in the 3GPP specifications and / or another standard) associated with the second subband. For example, UE 120 may determine that a third list of TCI states indicated in the Tci-StatesToAddModListPerSB-0 data structure is associated with the first subband because the data structure is associated with the first subband. Thus, the third list of TCI states may include one or more TCI states associated with a data channel, such as a PDSCH. Similarly, UE 120 may determine that a fourth list of TCI states indicated in the Tci-StatesToAddModListPerSB-1 data structure is associated with the second subband because the data structure is associated with the second subband. Thus, the fourth list of TCI states may include one or more TCI states associated with a control channel, such as a PDCCH.

[0098]

[0105] The RRC configuration message may similarly include one or more additional lists of TCI states, each list being associated with a different one or more additional subbands included in the wideband channel. For example, there may be a maximum number of subbands (e.g., represented by N in FIG. 6), and the base station 110 may transmit a configuration message with up to N lists (or up to 2N lists, with N or fewer lists associated with the control channel and N or fewer lists associated with the data channel). The maximum number of subbands may be programmed (and / or otherwise preconfigured) in the base station 110 and the UE 120 (e.g., according to the 3GPP specification and / or another standard). Additionally or alternatively, the base station 110 may determine the maximum number of subbands and may indicate the determined maximum number of subbands to the UE 120. In a combination example, the base station 110 may select the maximum number of subbands from multiple possible maximum numbers programmed (and / or otherwise preconfigured) in the base station 110 and the UE 120 (e.g., according to the 3GPP specification and / or another standard).

[0099]

[0106] In some aspects, the number of TCI states indicated by each list does not exceed a maximum number of TCI states, e.g., the maximum number of TCI states may be represented by K, such that each list does not indicate more than K states.

[0100]

[0107] The maximum number of TCI states may be programmed (and / or otherwise preconfigured) into base station 110 and UE 120 (e.g., according to a 3GPP specification and / or another standard). Additionally or alternatively, base station 110 may determine the maximum number of TCI states and may indicate the determined maximum number of TCI states to UE 120. In a combined example, base station 110 may select the maximum number of TCI states from multiple possible maximum numbers programmed (and / or otherwise preconfigured) into base station 110 and UE 120 (e.g., according to a 3GPP specification and / or another standard).

[0101]

[0108] In addition, the base station 110 may transmit, and the UE 120 may receive, an indication of the first subband and the second subband. In some aspects, the indication of the first subband may be included in the first TCI state, and the indication of the second subband may be included in the second TCI state. For example, each TCI-State data structure associated with a corresponding one of the first TCI states may include an index (e.g., an SB-index) associated with the first subband. In some aspects, the index may indicate that the TCI state is associated with more than one subband. Alternatively, each TCI-State data structure associated with a corresponding one of the first TCI states may include a paired index (e.g., a TCI-state-id data structure paired with an SB-index data structure) that indicates an identifier of the TCI state and associates the TCI state with the first subband. In some aspects, the paired index may indicate that the TCI state is associated with more than one subband.

[0102]

[0109] Additionally or alternatively, an indication of the first and second subbands may be included in the RRC configuration message, e.g., the RRC configuration message may include a data structure, separate from the list, indicating the first and second subbands.

[0103]

[0110] Base station 110 may also transmit one or more additional indications of one or more additional subbands included in the wideband channel.

[0104]

[0111] As indicated by reference numeral 610, the base station 110 may transmit, and the UE 120 may receive, a control element (e.g., MAC-CE) indicating a sublist of one or more first TCI states from the first list for use on the first subband. For example, the MAC-CE may indicate up to eight TCI states from a Tci-StatesToAddModListPerSB-0 data structure in the RRCReconfig data structure. Thus, the UE 120 may determine that the TCI state(s) indicated in the control element are associated with the first subband because the corresponding data structure is associated with the first subband. Thus, a subset of the first set of TCI states may be associated with a data channel, such as a PDSCH. In another example, the MAC-CE may indicate one TCI state from a Tci-StatesPDCCH-ToAddListPerSB-0 data structure in the RRCReconfig data structure. Thus, UE 120 may determine that the TCI state indicated in the control element is associated with the first subband because a corresponding data structure is associated with the first subband. Thus, a subset of the first set of TCI states may be associated with a control channel, such as a PDCCH.

[0105]

[0112] Alternatively, when the indication of the first subband is separate from the list included in the RRC configuration message, the TCI state(s) indicated by the control element may be at least partially subband independent. For example, the base station 110 may transmit, and the UE 120 may receive, a control element (e.g., MAC-CE) indicating a sublist of one or more first TCI states from the first list, one or more second TCI states from the second list, or a combination thereof, for use on the first subband or the second subband. Thus, the TCI state(s) indicated by the control element may be at least partially subband independent.

[0106]

[0113] In some aspects, the control element may further indicate the first subband such that the TCI state(s) are not subband independent. For example, the MAC-CE may include an identifier associated with the first subband (e.g., SB ID) in addition to or instead of an identifier associated with the BWP for the wideband channel (e.g., BWP ID).

[0107]

[0114] The base station 110 may similarly transmit a control element indicating a subset of the TCI states to use on other subbands.

[0108]

[0115] In an aspect where the control element indicates more than one TCI state, the base station 110 may transmit, and the UE 120 may receive, control information (e.g., DCI) indicating the TCI state in the sublist for use on the first subband, as indicated by reference numeral 615. For example, the DCI (e.g., DCI format 1_1 as defined by the 3GPP specifications and / or another standard) may indicate the TCI state using a codepoint associated with the TCI state from the control element. Thus, the UE 120 may determine that the TCI state indicated in the control information is associated with the first subband because the corresponding list from the RRC configuration message that indicated the TCI state is associated with the first subband. Additionally or alternatively, the UE 120 may determine that the TCI state indicated in the control information is associated with the first subband because the corresponding control element indicated the first subband (e.g., as described with respect to reference numeral 610).

[0109]

[0116] In aspects where the TCI state(s) indicated by the control element are at least partially subband independent (e.g., as described with respect to reference numeral 610), the control information may further indicate the first subband. For example, the DCI (e.g., DCI format 1_1 as defined by the 3GPP specifications and / or other standards) may include a field indicating a first subband of multiple subbands configured for the UE 120.

[0110]

[0117] Base station 110 may similarly transmit control information indicating the TCI status for use on other subbands.

[0111]

[0118] As indicated by reference numeral 620, the base station and the UE 120 may communicate using the TCI state (e.g., as indicated by control information and / or a control element). For example, the UE 120 may receive data or other signals using the TCI state (e.g., on a PDSCH, a PDCCH, and / or another downlink channel). Alternatively, the base station 110 may receive data or other signals using the TCI state (e.g., on a PUSCH, a PUCCH, and / or another uplink channel).

[0112]

[0119] By using the technique described in connection with FIG. 6, the base station 110 associates different subbands with different TCI states using an RRC configuration message. As a result, the base station 110 and / or the UE 120 reduce beam squint during transmission by applying subband-optimized TCI states. Thus, the reliability and / or quality of communication between the UE 120 and the base station 110 is improved, so that the UE 120 and the base station 110 are less likely to drop communication and use retransmissions. Using fewer retransmissions saves power and processing resources at the UE 120 and the base station 110. Using fewer retransmissions also reduces interference with other nearby devices (such as other UEs in the same serving cell or in neighboring cells).

[0113]

[0120] As noted above, Figure 6 is provided as an example. Other examples may differ from what is described with respect to Figure 6.

[0114]

[0121] 7 illustrates an example process 700 implemented, for example, by a UE, in accordance with the present disclosure. The example process 700 is an example in which a UE (e.g., UE 120 and / or apparatus 1100 of FIG. 11) performs operations associated with a TCI state for a subband.

[0115]

[0122] 7, in some aspects, process 700 may include receiving a first RRC configuration message from a base station (e.g., base station 110 and / or apparatus 1200 of FIG. 12) associated with a first subband included in a wideband channel between the UE and the base station and indicating a first set of TCI states to use on the first subband (block 710). For example, the UE (e.g., using communications manager 140 and / or receiving component 1102 shown in FIG. 11) may receive a first RRC configuration message from the base station associated with a first subband included in a wideband channel between the UE and the base station and indicating a first set of TCI states to use on the first subband, as described herein.

[0116]

[0123] 7, in some aspects, process 700 may include receiving a second RRC configuration message from the base station associated with a second subband included in the wideband channel and indicating a second set of TCI states for use on the second subband (block 720). For example, the UE may receive (e.g., using communications manager 140 and / or receiving component 1102) a second RRC configuration message from the base station associated with a second subband included in the wideband channel and indicating a second set of TCI states for use on the second subband as described herein.

[0117]

[0124] Process 700 may include additional aspects, such as any single aspect or any combination of aspects described below and / or in conjunction with one or more other processes described elsewhere herein.

[0118]

[0125] In a first aspect, the first set of TCI states includes one or more TCI states associated with a control channel and one or more additional TCI states associated with a data channel.

[0119]

[0126] In the second aspect alone or in combination with the first aspect, the number of TCI states indicated by each RRC configuration message does not exceed the maximum number of TCI states.

[0120]

[0127] In the third aspect alone or in combination with one or more of the first and second aspects, the process 700 may further include receiving one or more additional RRC configuration messages from the base station (e.g., using the communications manager 140 and / or the receiving component 1102), each additional RRC configuration message being associated with an additional subband and indicating an additional set of TCI states for use on the additional subband, wherein the number of RRC configuration messages does not exceed a maximum number of subbands.

[0121]

[0128] In the fourth aspect alone or in combination with one or more of the first through third aspects, the process 700 further includes receiving from the base station (e.g., using the communications manager 140 and / or the receiving component 1102) a control element indicating a subset of the first set of TCI states to use on the first subband.

[0122]

[0129] In the fifth aspect alone or in combination with one or more of the first through fourth aspects, the process 700 further includes receiving control information from a base station (e.g., using the communications manager 140 and / or the receiving component 1102) indicating a TCI state in a subset of the first set of TCI states for use on the first subband.

[0123]

[0130] In the sixth aspect alone or in combination with one or more of the first through fifth aspects, the process 700 may further include receiving from the base station (e.g., using the communications manager 140 and / or the receiving component 1102) a control element indicating a first set of TCI states, a second set of TCI states, or a subset of a combination thereof, for use on the first subband or the second subband.

[0124]

[0131] In the seventh aspect alone or in combination with one or more of the first through sixth aspects, the process 700 further includes receiving control information from a base station (e.g., using the communications manager 140 and / or the receiving component 1102) indicating a TCI state in the subset and indicating the first subband.

[0125]

[0132] Although Figure 7 illustrates example blocks of process 700, in some aspects process 700 may include additional blocks, fewer blocks, different blocks, or blocks in a different arrangement than those illustrated in Figure 7. Additionally or alternatively, two or more of the blocks of process 700 may be performed in parallel.

[0126]

[0133] 8 illustrates an example process 800 implemented, for example, by a base station, in accordance with the present disclosure. The example process 800 is an example in which a base station (e.g., base station 110 and / or apparatus 1200 of FIG. 12) performs operations associated with a TCI state for a subband.

[0127]

[0134] 8, in some aspects, process 800 may include transmitting a first RRC configuration message to a UE (e.g., UE 120 and / or device 1100 of FIG. 11) associated with a first subband included in a wideband channel between the UE and the base station and indicating a first set of TCI states to use on the first subband (block 810). For example, the base station (e.g., using communications manager 150 and / or transmitting component 1204 shown in FIG. 12) may transmit a first RRC configuration message to the UE associated with a first subband included in a wideband channel between the UE and the base station and indicating a first set of TCI states to use on the first subband, as described herein.

[0128]

[0135] 8, in some aspects, process 800 may include transmitting a second RRC configuration message to the UE associated with a second subband included in the wideband channel and indicating a second set of TCI states to use on the second subband (block 820). For example, the base station (e.g., using communications manager 150 and / or transmitting component 1204) may transmit a second RRC configuration message to the UE associated with a second subband included in the wideband channel and indicating a second set of TCI states to use on the second subband, as described herein.

[0129]

[0136] Process 800 may include additional aspects, such as any single aspect or any combination of aspects described below and / or in conjunction with one or more other processes described elsewhere herein.

[0130]

[0137] In a first aspect, the first set of TCI states includes one or more TCI states associated with a control channel and one or more additional TCI states associated with a data channel.

[0131]

[0138] In the second aspect alone or in combination with the first aspect, the number of TCI states indicated by each RRC configuration message does not exceed the maximum number of TCI states.

[0132]

[0139] In the third aspect alone or in combination with one or more of the first and second aspects, the process 800 may further include transmitting (e.g., using the communications manager 150 and / or the transmitting component 1204) one or more additional RRC configuration messages to the UE, each additional RRC configuration message being associated with an additional subband and indicating an additional set of TCI states to use on the additional subband, wherein the number of RRC configuration messages does not exceed a maximum number of subbands.

[0133]

[0140] In the fourth aspect alone or in combination with one or more of the first through third aspects, the process 800 may further include transmitting a control element to the UE (e.g., using the communications manager 150 and / or the transmitting component 1204) indicating a subset of the first set of TCI states to use on the first subband.

[0134]

[0141] In the fifth aspect alone or in combination with one or more of the first through fourth aspects, the process 800 further includes transmitting control information to the UE (e.g., using the communications manager 150 and / or the transmitting component 1204) indicating a TCI state in a subset of the first set of TCI states for use on the first subband.

[0135]

[0142] In the sixth aspect alone or in combination with one or more of the first through fifth aspects, the process 800 may further include transmitting (e.g., using the communications manager 150 and / or the transmitting component 1204) a control element to the UE indicating a subset of the first set of TCI states, the second set of TCI states, or a combination thereof, for use on the first subband or the second subband.

[0136]

[0143] In the seventh aspect alone or in combination with one or more of the first through sixth aspects, the process 800 may further include transmitting control information to the UE (e.g., using the communications manager 150 and / or the transmitting component 1204) indicating a TCI state in the subset and indicating the first subband.

[0137]

[0144] 8 illustrates example blocks of process 800, in some aspects process 800 may include additional, fewer, different, or differently arranged blocks compared to the blocks illustrated in FIG 8. Additionally or alternatively, two or more of the blocks of process 800 may be performed in parallel.

[0138]

[0145] 9 illustrates an example process 900 implemented, for example, by a UE, in accordance with the present disclosure. The example process 900 is an example in which a UE (e.g., UE 120 and / or apparatus 1100 of FIG. 11) performs operations associated with a TCI state for a subband.

[0139]

[0146] 9, in some aspects, the process 900 may include receiving an RRC configuration message from a base station (e.g., the base station 110 and / or the apparatus 1200 of FIG. 12) including at least a first list of first TCI states associated with the first subband and a second list of second TCI states associated with the second subband (block 910). For example, the UE (e.g., using the communications manager 140 and / or the receiving component 1102 shown in FIG. 11) may receive an RRC configuration message from the base station including at least a first list of first TCI states associated with the first subband and a second list of second TCI states associated with the second subband, as described herein.

[0140]

[0147] 9, in some aspects, the process 900 may include receiving an indication of the first sub-band and the second sub-band from the base station (block 920). For example, the UE may receive the indication of the first sub-band and the second sub-band from the base station (e.g., using the communications manager 140 and / or the receiving component 1102) as described herein.

[0141]

[0148] Process 900 may include additional aspects, such as any single aspect or any combination of aspects described below and / or in conjunction with one or more other processes described elsewhere herein.

[0142]

[0149] In a first aspect, the first TCI state is associated with a control channel, the second TCI state is associated with the control channel, and the RRC configuration message further includes a third list of a third TCI state associated with the first subband and associated with the data channel, and includes a fourth list of a fourth TCI state associated with the second subband and associated with the data channel.

[0143]

[0150] In the second aspect alone or in combination with the first aspect, the number of TCI states indicated by each list does not exceed the maximum number of TCI states.

[0144]

[0151] In the third aspect alone or in combination with one or more of the first and second aspects, the number of lists included in the RRC configuration message does not exceed the maximum number of subbands.

[0145]

[0152] In the fourth aspect alone or in combination with one or more of the first to third aspects, an indication of the first subband is included in a first TCI state and an indication of the second subband is included in a second TCI state.

[0146]

[0153] In the fifth aspect alone or in combination with one or more of the first to fourth aspects, the indication of the first subband and the second subband is included in an RRC configuration message.

[0147]

[0154] In the sixth aspect alone or in combination with one or more of the first through fifth aspects, the process 900 further includes receiving from the base station (e.g., using the communications manager 140 and / or the receiving component 1102) a control element indicating a sublist of one or more first TCI states from the first list for use on the first subband.

[0148]

[0155] In the seventh aspect alone or in combination with one or more of the first to sixth aspects, the control element further indicates the first subband.

[0149]

[0156] In the eighth aspect alone or in combination with one or more of the first through seventh aspects, the process 900 further includes receiving control information from a base station (e.g., using the communications manager 140 and / or the receiving component 1102) indicating a TCI status in the sublist for use on the first subband.

[0150]

[0157] In the ninth aspect alone or in combination with one or more of the first to eighth aspects, the control information further indicates the first subband.

[0151]

[0158] In the tenth aspect alone or in combination with one or more of the first through ninth aspects, the process 900 further includes receiving from the base station (e.g., using the communications manager 140 and / or the receiving component 1102) a control element indicating a sub-list of one or more first TCI states from the first list, one or more second TCI states from the second list, or a combination thereof, for use on the first subband or the second subband.

[0152]

[0159] 9 illustrates example blocks of process 900, in some aspects process 900 may include additional, fewer, different, or differently arranged blocks compared to the blocks illustrated in FIG 9. Additionally or alternatively, two or more of the blocks of process 900 may be performed in parallel.

[0153]

[0160] 10 illustrates an example process 1000 implemented, for example, by a base station, in accordance with the present disclosure. The example process 1000 is an example in which a base station (e.g., base station 110 and / or apparatus 1200 of FIG. 12) performs operations associated with a TCI state for a subband.

[0154]

[0161] 10, in some aspects, process 1000 may include transmitting an RRC configuration message to a UE (e.g., UE 120 and / or apparatus 1100 of FIG. 11) including at least a first list of first TCI states associated with the first subband and a second list of second TCI states associated with the second subband (block 1010). For example, a base station may transmit to the UE (e.g., using communications manager 150 and / or transmitting component 1204 shown in FIG. 12) an RRC configuration message including at least the first list of first TCI states associated with the first subband and the second list of second TCI states associated with the second subband, as described herein.

[0155]

[0162] 10, in some aspects, the process 1000 may include transmitting an indication of the first subband and the second subband to the UE (block 1020). For example, the base station may transmit the indication of the first subband and the second subband to the UE (e.g., using the communications manager 150 and / or the transmitting component 1204) as described herein.

[0156]

[0163] Process 1000 may include additional aspects, such as any single aspect or any combination of aspects described below and / or in conjunction with one or more other processes described elsewhere herein.

[0157]

[0164] In a first aspect, the first TCI state is associated with a control channel, the second TCI state is associated with the control channel, and the RRC configuration message further includes a third list of a third TCI state associated with the first subband and associated with the data channel, and includes a fourth list of a fourth TCI state associated with the second subband and associated with the data channel.

[0158]

[0165] In the second aspect alone or in combination with the first aspect, the number of TCI states indicated by each list does not exceed the maximum number of TCI states.

[0159]

[0166] In the third aspect alone or in combination with one or more of the first and second aspects, the number of lists included in the RRC configuration message does not exceed the maximum number of subbands.

[0160]

[0167] In the fourth aspect alone or in combination with one or more of the first to third aspects, an indication of the first subband is included in a first TCI state and an indication of the second subband is included in a second TCI state.

[0161]

[0168] In the fifth aspect alone or in combination with one or more of the first to fourth aspects, the indication of the first subband and the second subband is included in an RRC configuration message.

[0162]

[0169] In the sixth aspect alone or in combination with one or more of the first to fifth aspects, the process 1000 may further include transmitting to the UE (e.g., using the communications manager 150 and / or the transmitting component 1204 shown in FIG. 12 ) a control element indicating a sublist of one or more first TCI states from the first list for use on the first subband.

[0163]

[0170] In the seventh aspect alone or in combination with one or more of the first to sixth aspects, the control element further indicates the first subband.

[0164]

[0171] In the eighth aspect alone or in combination with one or more of the first to seventh aspects, the process 1000 further includes transmitting control information to the UE (e.g., using the communications manager 150 and / or the transmitting component 1204 shown in FIG. 12) indicating the TCI status in the sublist for use on the first subband.

[0165]

[0172] In the ninth aspect alone or in combination with one or more of the first to eighth aspects, the control information further indicates the first subband.

[0166]

[0173] In the tenth aspect alone or in combination with one or more of the first to ninth aspects, the process 1000 may further include transmitting (e.g., using the communications manager 150 and / or the transmitting component 1204 shown in FIG. 12 ) a control element to the UE indicating a sub-list of one or more first TCI states from the first list, one or more second TCI states from the second list, or a combination thereof, for use on the first subband or the second subband.

[0167]

[0174] 10 illustrates example blocks of process 1000, in some aspects process 1000 may include additional, fewer, different, or differently arranged blocks compared to the blocks illustrated in FIG 10. Additionally or alternatively, two or more of the blocks of process 1000 may be performed in parallel.

[0168]

[0175] FIG. 11 illustrates an example apparatus 1100 for wireless communication. The apparatus 1100 may be a UE, or the UE may include the apparatus 1100. In some aspects, the apparatus 1100 includes a receiving component 1102 and a transmitting component 1104, which may communicate with one another (e.g., via one or more buses and / or one or more other components). As shown, the apparatus 1100 may communicate with another apparatus 1106 (such as a UE, a base station, or another wireless communication device) using the receiving component 1102 and the transmitting component 1104. As further shown, the apparatus 1100 may include a communications manager 140. The communications manager 140 may include a TCI application component 1108, among other examples.

[0169]

[0176] In some aspects, the apparatus 1100 may be configured to perform one or more operations described herein with respect to FIGS. 5-6. Additionally or alternatively, the apparatus 1100 may be configured to perform one or more processes described herein, such as process 700 of FIG. 7, process 900 of FIG. 9, or a combination thereof. In some aspects, the apparatus 1100 and / or one or more components shown in FIG. 11 may include one or more components of a UE described in connection with FIG. 2. Additionally or alternatively, one or more components shown in FIG. 11 may be implemented in one or more components described in connection with FIG. 2. Additionally or alternatively, one or more components of the set of components may be implemented at least in part as software stored in a memory. For example, a component (or a portion of a component) may be implemented as instructions or code stored in a non-transitory computer-readable medium and executable by a controller or processor to perform the function or operation of the component.

[0170]

[0177] The receiving component 1102 may receive communications, such as reference signals, control information, data communications, or combinations thereof, from the device 1106. The receiving component 1102 may provide the received communications to one or more other components of the device 1100. In some aspects, the receiving component 1102 may perform signal processing (such as filtering, amplification, demodulation, analog-to-digital conversion, demultiplexing, deinterleaving, demapping, equalization, interference cancellation, or decoding, among other examples) on the received communications and provide the processed signals to one or more other components of the device 1100. In some aspects, the receiving component 1102 may include one or more antennas, a modem, a demodulator, a MIMO detector, a receive processor, a controller / processor, a memory, or a combination thereof of a UE as described in connection with FIG. 2.

[0171]

[0178] The transmitting component 1104 may transmit a communication, such as a reference signal, control information, a data communication, or a combination thereof, to the device 1106. In some aspects, one or more other components of the device 1100 may generate a communication and provide the generated communication to the transmitting component 1104 for transmission to the device 1106. In some aspects, the transmitting component 1104 may perform signal processing (such as filtering, amplification, modulation, digital-to-analog conversion, multiplexing, interleaving, mapping, or encoding, among other examples) on the generated communication and may transmit the processed signal to the device 1106. In some aspects, the transmitting component 1104 may include one or more antennas, a modem, a modulator, a transmit MIMO processor, a transmit processor, a controller / processor, a memory, or a combination thereof, of a UE as described in connection with FIG. 2. In some aspects, the transmitting component 1104 may be collocated with the receiving component 1102 in a transceiver.

[0172]

[0179] In some aspects, the receiving component 1102 may receive (e.g., from the device 1106) a first RRC configuration message associated with a first subband included in the wideband channel between the device 1100 and the device 1106 and indicating a first set of TCI states to use on the first subband. The receiving component 1102 may additionally receive (e.g., from the device 1106) a second RRC configuration message associated with a second subband included in the wideband channel and indicating a second set of TCI states to use on the second subband. Thus, the TCI applying component 1108 may apply a TCI state from the first set or the second set (e.g., by adjusting one or more physical characteristics associated with the receiving component 1102 and / or the transmitting component 1104) based at least in part on whether the device 1100 and / or the device 1106 is using the first or second subband.

[0173]

[0180] In some aspects, the receiving component 1102 may further receive one or more additional RRC configuration messages (e.g., from the apparatus 1106), each additional RRC configuration message associated with an additional subband and indicating an additional set of TCI states to use on the additional subband. Thus, the TCI applying component 1108 may apply a TCI state from the additional set of TCI states (e.g., by adjusting one or more physical characteristics associated with the receiving component 1102 and / or the transmitting component 1104) when the apparatus 1100 and / or the apparatus 1106 is using an additional subset corresponding to the additional set of TCI states.

[0174]

[0181] In some aspects, the receiving component 1102 may receive (e.g., from the apparatus 1106) a control element indicating a subset of the first set of TCI states to use on the first subband. Thus, the TCI applying component 1108 may apply a TCI state from the subset. In some aspects, the receiving component 1102 may further receive (e.g., from the apparatus 1106) control information indicating a TCI state in the subset of the first set of TCI states to use on the first subband. Thus, the TCI applying component 1108 may apply the indicated TCI state.

[0175]

[0182] In some aspects, the receiving component 1102 may receive (e.g., from the device 1106) a control element indicating a subset of the first set of TCI states, the second set of TCI states, or a combination thereof, for use on the first subband or the second subband. Thus, the TCI applying component 1108 may apply a TCI state from the subset. In some aspects, the receiving component 1102 may further receive (e.g., from the device 1106) control information indicating a TCI state in the subset and indicating the first subband. Thus, the TCI applying component 1108 may apply the indicated TCI state.

[0176]

[0183] Alternatively, the receiving component 1102 may receive (e.g., from the device 1106) an RRC configuration message including at least a first list of a first TCI state associated with a first subband and a second list of a second TCI state associated with a second subband. Additionally, the receiving component 1102 may receive (e.g., from the device 1106) an indication of the first subband and the second subband. Thus, the TCI applying component 1108 may apply a TCI state from the first list or the second list (e.g., by adjusting one or more physical characteristics associated with the receiving component 1102 and / or the transmitting component 1104) based at least in part on whether the device 1100 and / or the device 1106 is using the first subband or the second subband.

[0177]

[0184] In some aspects, the receiving component 1102 may receive (e.g., from the device 1106) a control element indicating a sub-list of one or more first TCI states from the first list to use on the first subband. Thus, the TCI applying component 1108 may apply the TCI states from the sub-list. In some aspects, the receiving component 1102 may further receive (e.g., from the device 1106) control information indicating the TCI states in the sub-list to use on the first subband. Thus, the TCI applying component 1108 may apply the indicated TCI states.

[0178]

[0185] In some aspects, the receiving component 1102 may receive (e.g., from the device 1106) a control element indicating a sub-list of one or more first TCI states from a first list, one or more second TCI states from a second list, or a combination thereof, for use on the first subband or the second subband. Thus, the TCI applying component 1108 may apply a TCI state from the sub-list. In some aspects, the receiving component 1102 may further receive (e.g., from the device 1106) control information indicating a TCI state in the sub-list and indicating the first subband. Thus, the TCI applying component 1108 may apply the indicated TCI state.

[0179]

[0186] The number and arrangement of components shown in Figure 11 are provided as an example. In practice, there may be additional components, fewer components, different components, or a different arrangement of components compared to those shown in Figure 11. Furthermore, two or more of the components shown in Figure 11 may be implemented within a single component, or a single component shown in Figure 11 may be implemented as multiple distributed components. Additionally or alternatively, a set of components shown in Figure 11 may perform one or more functions described as being performed by another set of components shown in Figure 11.

[0180]

[0187] FIG. 12 illustrates an example apparatus 1200 for wireless communication. The apparatus 1200 may be a base station, or a base station may include the apparatus 1200. In some aspects, the apparatus 1200 includes a receiving component 1202 and a transmitting component 1204, which may communicate with one another (e.g., via one or more buses and / or one or more other components). As shown, the apparatus 1200 may communicate with another apparatus 1206 (such as a UE, a base station, or another wireless communication device) using the receiving component 1202 and the transmitting component 1204. As further shown, the apparatus 1200 may include a communications manager 150. The communications manager 150 may include a TCI selection component 1208, among other examples.

[0181]

[0188] In some aspects, the apparatus 1200 may be configured to perform one or more operations described herein with respect to FIGS. 5-6. Additionally or alternatively, the apparatus 1200 may be configured to perform one or more processes described herein, such as process 800 of FIG. 8, process 1000 of FIG. 10, or a combination thereof. In some aspects, the apparatus 1200 and / or one or more components shown in FIG. 12 may include one or more components of a base station described in connection with FIG. 2. Additionally or alternatively, one or more components shown in FIG. 12 may be implemented in one or more components described in connection with FIG. 2. Additionally or alternatively, one or more components of the set of components may be implemented at least in part as software stored in a memory. For example, a component (or a portion of a component) may be implemented as instructions or code stored in a non-transitory computer-readable medium and executable by a controller or processor to perform the function or operation of the component.

[0182]

[0189] The receiving component 1202 may receive communications, such as reference signals, control information, data communications, or combinations thereof, from the device 1206. The receiving component 1202 may provide the received communications to one or more other components of the device 1200. In some aspects, the receiving component 1202 may perform signal processing (such as filtering, amplification, demodulation, analog-to-digital conversion, demultiplexing, deinterleaving, demapping, equalization, interference cancellation, or decoding, among other examples) on the received communications and provide the processed signals to one or more other components of the device 1200. In some aspects, the receiving component 1202 may include one or more antennas, a modem, a demodulator, a MIMO detector, a receive processor, a controller / processor, a memory, or a combination thereof of a base station as described in connection with FIG.

[0183]

[0190] The transmitting component 1204 may transmit a communication, such as a reference signal, control information, a data communication, or a combination thereof, to the device 1206. In some aspects, one or more other components of the device 1200 may generate a communication and provide the generated communication to the transmitting component 1204 for transmission to the device 1206. In some aspects, the transmitting component 1204 may perform signal processing (such as filtering, amplification, modulation, digital-to-analog conversion, multiplexing, interleaving, mapping, or encoding, among other examples) on the generated communication and may transmit the processed signal to the device 1206. In some aspects, the transmitting component 1204 may include one or more antennas, a modem, a modulator, a transmit MIMO processor, a transmit processor, a controller / processor, a memory, or a combination thereof, of a base station as described in connection with FIG. 2. In some aspects, the transmitting component 1204 may be collocated with the receiving component 1202 in a transceiver.

[0184]

[0191] In some aspects, the transmitting component 1204 may transmit (e.g., to the device 1206) a first RRC configuration message associated with a first subband included in the wideband channel between the device 1200 and the device 1206 and indicating a first set of TCI states to use on the first subband. For example, the TCI selection component 1208 may select the first set of TCI states for the first subband based at least in part on measurements associated with the first set of TCI states by the device 1200, the device 1206, and / or another device. The transmitting component 1204 may further transmit (e.g., to the device 1206) a second RRC configuration message associated with a second subband included in the wideband channel and indicating a second set of TCI states to use on the second subband. For example, the TCI selection component 1208 may select a second set of TCI conditions for the second subband based at least in part on measurements associated with the second set of TCI conditions by the device 1200, the device 1206, and / or another device.

[0185]

[0192] In some aspects, transmitting component 1204 may further transmit (e.g., to apparatus 1206) one or more additional RRC configuration messages, each additional RRC configuration message associated with an additional subband and indicating an additional set of TCI states for use on the additional subband. For example, TCI selection component 1208 may select one or more additional sets of TCI states for the additional subband(s) based at least in part on measurements associated with the additional set(s) of TCI states by apparatus 1200, apparatus 1206, and / or another device.

[0186]

[0193] In some aspects, the transmitting component 1204 may transmit (e.g., to the device 1206) a control element indicating a subset of the first set of TCI states to use on the first subband. For example, the TCI selection component 1208 may select a subset of the first set of TCI states based at least in part on measurements associated with the subset by the device 1200, the device 1206, and / or another device. In some aspects, the transmitting component 1204 may further transmit (e.g., to the device 1206) control information indicating a TCI state in the subset of the first set of TCI states to use on the first subband. For example, the TCI selection component 1208 may select a TCI state in the subset based at least in part on measurements associated with the TCI state by the device 1200, the device 1206, and / or another device.

[0187]

[0194] In some aspects, the transmitting component 1204 may transmit (e.g., to the device 1206) a control element indicating a subset of the first set of TCI states, the second set of TCI states, or a combination thereof, for use on the first subband or the second subband. For example, the TCI selection component 1208 may select the subset based at least in part on measurements associated with the subset by the device 1200, the device 1206, and / or another device. In some aspects, the transmitting component 1204 may further transmit (e.g., to the device 1206) control information indicating the TCI states in the subset and indicating the first subband. For example, the TCI selection component 1208 may select the TCI states in the subset based at least in part on measurements associated with the TCI states by the device 1200, the device 1206, and / or another device.

[0188]

[0195] Alternatively, the transmitting component 1204 may transmit (e.g., to the device 1206) an RRC configuration message including at least a first list of a first TCI state associated with the first subband and a second list of a second TCI state associated with the second subband. For example, the TCI selection component 1208 may select a first set of TCI states for the first subband based at least in part on measurements associated with the first set of TCI states by the device 1200, the device 1206, and / or another device, and select a second set of TCI states for the second subband based at least in part on measurements associated with the second set of TCI states by the device 1200, the device 1206, and / or another device. The transmitting component 1204 may further transmit (e.g., to the device 1206) an indication of the first subband and the second subband.

[0189]

[0196] In some aspects, the transmitting component 1204 may transmit (e.g., to the device 1206) a control element indicating a sub-list of one or more first TCI states from the first list for use on the first subband. For example, the TCI selection component 1208 may select a sub-list of one or more first TCI states by the device 1200, the device 1206, and / or another device based at least in part on a measurement associated with the first TCI state(s). In some aspects, the transmitting component 1204 may further transmit (e.g., to the device 1206) control information indicating the TCI states in the sub-list for use on the first subband. For example, the TCI selection component 1208 may select a TCI state in the sub-list based at least in part on a measurement associated with the TCI state by the device 1200, the device 1206, and / or another device.

[0190]

[0197] In some aspects, the transmitting component 1204 may transmit (e.g., to the device 1206) a control element indicating a sub-list of one or more first TCI states from the first list, one or more second TCI states from the second list, or a combination thereof, for use on the first subband or the second subband. For example, the TCI selection component 1208 may select the sub-list based at least in part on measurements associated with the sub-list by the device 1200, the device 1206, and / or another device. In some aspects, the transmitting component 1204 may further transmit (e.g., to the device 1206) control information indicating the TCI states in the sub-list and indicating the first subband. For example, the TCI selection component 1208 may select a TCI state in the sub-list based at least in part on measurements associated with the TCI states by the device 1200, the device 1206, and / or another device.

[0191]

[0198] The number and arrangement of components shown in Figure 12 are provided as an example. In practice, there may be additional components, fewer components, different components, or a different arrangement of components compared to those shown in Figure 12. Furthermore, two or more of the components shown in Figure 12 may be implemented within a single component, or a single component shown in Figure 12 may be implemented as multiple distributed components. Additionally or alternatively, a set of components shown in Figure 12 may perform one or more functions that are described as being performed by another set of components shown in Figure 12.

[0192]

[0199] The following provides a summary of several aspects of the disclosure.

[0200] Aspect 1: A method of wireless communications performed by a user equipment (UE), comprising: receiving from the base station a first radio resource control (RRC) configuration message associated with a first subband included in a wideband channel between the UE and the base station, the first RRC configuration message indicating a first set of transmission configuration indicator (TCI) states for use on the first subband; and receiving from the base station a second RRC configuration message associated with a second subband included in the wideband channel, the second RRC configuration message indicating a second set of TCI states for use on the second subband.

[0193]

[0201] Aspect 2: The method of aspect 1, wherein the first set of TCI states includes one or more TCI states associated with a control channel and one or more additional TCI states associated with a data channel.

[0194]

[0202] Aspect 3: The method according to aspect 1 or 2, wherein the number of TCI states indicated by each RRC configuration message does not exceed the maximum number of TCI states.

[0195]

[0203] Aspect 4: The method of any one of aspects 1 to 3, further comprising receiving one or more additional RRC configuration messages from the base station, each additional RRC configuration message being associated with an additional subband and indicating an additional set of TCI states to use on the additional subband, wherein the number of RRC configuration messages does not exceed a maximum number of subbands.

[0196]

[0204] Aspect 5: The method of any one of aspects 1 to 4, further comprising receiving a control element from the base station indicating a subset of the first set of TCI states to use on the first subband.

[0197]

[0205] Aspect 6: The method of aspect 5, further comprising receiving control information from a base station indicating a TCI state in a subset of the first set of TCI states to use on the first subband.

[0198]

[0206] Aspect 7: The method of any one of aspects 1 to 4, further comprising receiving a control element from the base station indicating a first set of TCI states, a second set of TCI states, or a subset of a combination thereof, for use on the first subband or the second subband.

[0199]

[0207] Aspect 8: The method of aspect 7, wherein the subset indicated by the control element is further selected from one or more additional sets of TCI states for use on one or more additional subbands associated with the one or more additional sets of TCI states.

[0200]

[0208] Example 9: The method of example 7 or 8, further comprising receiving control information from the base station indicating a TCI state in the subset and indicating the first subband.

[0201]

[0209] Aspect 10: A method of wireless communications performed by a base station, comprising: transmitting a first radio resource control (RRC) configuration message to a user equipment (UE) associated with a first subband included in a wideband channel between the UE and the base station, the RRC configuration message indicating a first set of transmission configuration indicator (TCI) states for use on the first subband; and transmitting a second RRC configuration message to the UE associated with a second subband included in the wideband channel, the RRC configuration message indicating a second set of TCI states for use on the second subband.

[0202]

[0210] Aspect 11: The method of aspect 10, wherein the first set of TCI states includes one or more TCI states associated with a control channel and one or more additional TCI states associated with a data channel.

[0203]

[0211] Aspect 12: The method according to aspect 10 or 11, wherein the number of TCI states indicated by each RRC configuration message does not exceed the maximum number of TCI states.

[0204]

[0212] Aspect 13: The method of any one of aspects 10 to 12, further comprising: transmitting one or more additional RRC configuration messages to the UE, each additional RRC configuration message being associated with an additional subband and indicating an additional set of TCI states to use on the additional subband, wherein the number of RRC configuration messages does not exceed a maximum number of subbands.

[0205]

[0213] Example 14: The method of any one of Examples 10 to 13, further comprising: transmitting a control element to the UE indicating a subset of the first set of TCI states to use on the first subband.

[0206]

[0214] Example 15: The method of example 14, further comprising: transmitting control information to the UE indicating a TCI state in a subset of the first set of TCI states to use on the first subband.

[0207]

[0215] Aspect 16: The method of any one of aspects 10 to 13, further comprising transmitting a control element to the UE indicating a first set of TCI states, a second set of TCI states, or a subset of a combination thereof, for use on the first subband or the second subband.

[0208]

[0216] Aspect 17: The method of aspect 16, wherein the subset indicated by the control element is further selected from one or more additional sets of TCI states for use on one or more additional subbands associated with the one or more additional sets of TCI states.

[0209]

[0217] Example 18: The method of example 16 or 17, further comprising: transmitting control information to the UE indicating a TCI status in the subset and indicating the first subband.

[0210]

[0218] Aspect 19: A method of wireless communication performed by a user equipment (UE), comprising: receiving a radio resource control (RRC) configuration message from a base station, the RRC configuration message including at least a first list of a first transmission configuration indicator (TCI) state associated with a first subband and a second list of a second TCI state associated with a second subband; and receiving an indication of the first subband and the second subband from the base station.

[0211]

[0219] Aspect 20: The method of aspect 19, wherein a first TCI state is associated with a control channel, a second TCI state is associated with the control channel, and the RRC configuration message further includes a third list of a third TCI state associated with the first subband and associated with the data channel, and a fourth list of a fourth TCI state associated with the second subband and associated with the data channel.

[0212]

[0220] Aspect 21: The method of aspect 19 or 20, wherein the number of TCI states indicated by each list does not exceed the maximum number of TCI states.

[0213]

[0221] Example 22: The method according to any one of examples 19 to 21, wherein the number of lists included in the RRC configuration message does not exceed the maximum number of subbands.

[0214]

[0222] Aspect 23: The method of any one of aspects 19 to 22, wherein the indication of the first subband is included in a first TCI state, and the indication of the second subband is included in a second TCI state.

[0215]

[0223] Example 24: The method of any one of Examples 19 to 23, wherein the indication of the first subband and the second subband is included in an RRC configuration message.

[0216]

[0224] Aspect 25: The method of any one of aspects 19 to 24, further comprising receiving a control element from the base station indicating a sublist of one or more first TCI states from the first list for use on the first subband.

[0217]

[0225] Example 26: The method of example 25, wherein the control element further indicates the first subband.

[0218]

[0226] Example 27: The method of example 25 or 26, further comprising receiving control information from a base station indicating a TCI status in a sublist for use on the first subband.

[0219]

[0227] Example 28: The method of example 27, wherein the control information further indicates the first subband.

[0220]

[0228] Aspect 29: The method of any one of aspects 19 to 24, further comprising receiving a control element from the base station indicating a sub-list of one or more first TCI states from a first list, one or more second TCI states from a second list, or a combination thereof, for use on the first subband or the second subband.

[0221]

[0229] Example 30: The method of example 29, wherein the control element further indicates the first subband.

[0222]

[0230] Aspect 31: The method of aspect 29 or 30, further comprising receiving control information from a base station indicating a TCI state in the sublist and indicating the first subband.

[0223]

[0231] Aspect 32: A method according to any one of aspects 29 to 31, wherein the sublist indicated by the control element is further selected from one or more additional lists of TCI states for use on one or more additional subbands associated with the one or more additional lists of TCI states.

[0224]

[0232] Aspect 33: A method of wireless communication performed by a base station, comprising: transmitting a radio resource control (RRC) configuration message to a user equipment (UE) including at least a first list of a first transmission configuration indicator (TCI) state associated with a first subband and a second list of a second TCI state associated with a second subband; and transmitting an indication of the first subband and the second subband to the UE.

[0225]

[0233] Aspect 34: The method of aspect 33, wherein a first TCI state is associated with a control channel, a second TCI state is associated with the control channel, and the RRC configuration message further includes a third list of a third TCI state associated with the first subband and associated with the data channel, and a fourth list of a fourth TCI state associated with the second subband and associated with the data channel.

[0226]

[0234] Aspect 35: The method described in aspect 33 or 34, wherein the number of TCI states indicated by each list does not exceed the maximum number of TCI states.

[0227]

[0235] Example 36: The method according to any one of examples 33 to 35, wherein the number of lists included in the RRC configuration message does not exceed the maximum number of subbands.

[0228]

[0236] Example 37: The method of any one of examples 33 to 36, wherein the indication of the first subband is included in a first TCI state and the indication of the second subband is included in a second TCI state.

[0229]

[0237] Example 38: The method of any one of examples 33 to 37, wherein the indication of the first subband and the second subband is included in an RRC configuration message.

[0230]

[0238] Example 39: The method of any one of examples 33 to 38, further comprising transmitting a control element to the UE indicating a sublist of one or more first TCI states from the first list for use on the first subband.

[0231]

[0239] Example 40: The method of example 39, wherein the control element further indicates the first subband.

[0232]

[0240] Example 41: The method of example 39 or 40, further comprising: transmitting control information to the UE indicating a TCI status in a sublist for use on the first subband.

[0233]

[0241] Aspect 42: The method of aspect 41, wherein the control information further indicates the first subband.

[0234]

[0242] Aspect 43: The method of any one of aspects 33 to 38, further comprising transmitting a control element to the UE indicating a sub-list of one or more first TCI states from a first list, one or more second TCI states from a second list, or a combination thereof, for use on the first subband or the second subband.

[0235]

[0243] Example 44: The method of example 43, wherein the control information further indicates the first subband.

[0236]

[0244] Example 45: The method of example 43 or 44, further comprising: transmitting control information to the UE indicating a TCI status in the sublist and indicating the first subband.

[0237]

[0245] Aspect 46: A method according to any one of aspects 43 to 45, wherein the sublist indicated by the control element is further selected from one or more additional lists of TCI states for use on one or more additional subbands associated with the one or more additional lists of TCI states.

[0238]

[0246] Aspect 47: An apparatus for wireless communication in a device, comprising: a processor; a memory coupled to the processor; and instructions stored in the memory and executable by the processor, the instructions being executable by the processor to cause the apparatus to perform a method as described in one or more of aspects 1 to 9.

[0239]

[0247] Aspect 48: A device for wireless communication, comprising: a memory; and one or more processors coupled to the memory, the one or more processors configured to perform the methods described in one or more of aspects 1-9.

[0240]

[0248] Example 49: An apparatus for wireless communication, comprising at least one means for performing the method according to one or more of examples 1-9.

[0241]

[0249] Aspect 50: A non-transitory computer-readable medium storing code for wireless communication, the code including instructions executable by a processor to perform a method as described in one or more of aspects 1-9.

[0242]

[0250] Aspect 51: A non-transitory computer-readable medium storing a set of instructions for wireless communication, the set of instructions including one or more instructions that, when executed by one or more processors of a device, cause the device to perform a method described in one or more of aspects 1-9.

[0243]

[0251] Aspect 52: An apparatus for wireless communication in a device, comprising: a processor; a memory coupled to the processor; and instructions stored in the memory and executable by the processor, the instructions being executable by the processor to cause the apparatus to perform a method according to one or more of aspects 10 to 18.

[0244]

[0252] Aspect 53: A device for wireless communication, comprising: a memory; and one or more processors coupled to the memory, the one or more processors configured to implement a method according to one or more of aspects 10 to 18.

[0245]

[0253] Example 54: An apparatus for wireless communication, comprising at least one means for performing the method according to one or more of examples 10-18.

[0246]

[0254] Aspect 55: A non-transitory computer-readable medium storing code for wireless communication, the code including instructions executable by a processor to perform a method as described in one or more of aspects 10-18.

[0247]

[0255] Aspect 56: A non-transitory computer-readable medium storing a set of instructions for wireless communication, the set of instructions including one or more instructions that, when executed by one or more processors of a device, cause the device to perform a method described in one or more of aspects 10-18.

[0248]

[0256] Aspect 57: An apparatus for wireless communication in a device, comprising: a processor; a memory coupled to the processor; and instructions stored in the memory and executable by the processor, the instructions being executable by the processor to cause the apparatus to perform a method according to one or more of aspects 19 to 32.

[0249]

[0257] Aspect 58: A device for wireless communication, comprising: a memory; and one or more processors coupled to the memory and configured to perform the methods described in one or more of aspects 19 to 32.

[0250]

[0258] Example 59: An apparatus for wireless communication, comprising at least one means for performing the method according to one or more of examples 19 to 32.

[0251]

[0259] Aspect 60: A non-transitory computer-readable medium storing code for wireless communication, the code including instructions executable by a processor to perform a method as described in one or more of aspects 19-32.

[0252]

[0260] Aspect 61: A non-transitory computer-readable medium storing a set of instructions for wireless communication, the set of instructions including one or more instructions that, when executed by one or more processors of a device, cause the device to perform a method described in one or more of aspects 19-32.

[0253]

[0261] Aspect 62: An apparatus for wireless communication in a device, the apparatus including a processor, a memory coupled to the processor, and instructions stored in the memory and executable by the processor, the instructions being executable by the processor to cause the apparatus to perform a method described in one or more of aspects 33 to 46.

[0254]

[0262] Aspect 63: A device for wireless communication, comprising: a memory; and one or more processors coupled to the memory, the one or more processors configured to implement the methods described in one or more of aspects 33 to 46.

[0255]

[0263] Aspect 64: An apparatus for wireless communication, comprising at least one means for performing the method according to one or more of aspects 33 to 46.

[0256]

[0264] Aspect 65: A non-transitory computer-readable medium storing code for wireless communication, the code including instructions executable by a processor to perform a method described in one or more of aspects 33-46.

[0257]

[0265] Aspect 66: A non-transitory computer-readable medium storing a set of instructions for wireless communication, the set of instructions including one or more instructions that, when executed by one or more processors of a device, cause the device to perform a method described in one or more of aspects 33-46.

[0258]

[0266] The above disclosure provides illustration and description, but is not intended to be exhaustive or to limit the embodiments to the precise form disclosed. Modifications and variations may be made in light of the above disclosure or may be acquired from practice of the embodiments.

[0259]

[0267] The term "component" as used herein shall be broadly construed as hardware and / or a combination of hardware and software. "Software" shall be broadly construed to mean, among other examples, instructions, instruction sets, code, code segments, program code, programs, subprograms, software modules, applications, software applications, software packages, routines, subroutines, objects, executable files, threads of execution, procedures, and / or functions, whether referred to as software, firmware, middleware, microcode, hardware description language, or otherwise. A "processor" as used herein is implemented in hardware and / or a combination of hardware and software. It will be apparent that the systems and / or methods described herein may be implemented in different forms of hardware and / or a combination of hardware and software. The actual dedicated control hardware or software code used to implement these systems and / or methods is not intended to limit the aspects. Thus, the operation and behavior of the systems and / or methods are described herein without reference to specific software code, as those skilled in the art will appreciate that software and hardware may be designed to implement the systems and / or methods based at least in part on the description herein.

[0260]

[0268] As used herein, "meeting a threshold" can refer to a value being greater than the threshold, greater than or equal to the threshold, less than the threshold, less than or equal to the threshold, equal to the threshold, not equal to the threshold, etc., depending on the context.

[0261]

[0269] Although particular combinations of features are recited in the claims and / or disclosed herein, those combinations do not limit the disclosure of the various aspects. Many of these features may be combined in ways not specifically recited in the claims and / or disclosed herein. The disclosure of the various aspects includes each dependent claim in combination with any other claim in the claim set. As used herein, a phrase referring to "at least one of" a list of items refers to any combination of those items, including single members. As an example, "at least one of a, b, or c" is intended to include a, b, c, a+b, a+c, b+c, and a+b+c, as well as any combination having multiple identical elements (e.g., a+a, a+a+a, a+a+b, a+a+c, a+b+b, a+c+c, b+b, b+b+b, b+b+c, c+c, and c+c+c, or any other order of a, b, and c).

[0262]

[0270] No element, act, or instruction used herein should be construed as critical or essential unless expressly described as such. Additionally, the articles "a" and "an" as used herein are intended to include one or more items and may be used interchangeably with "one or more." Additionally, the article "the" as used herein is intended to include one or more items referred to in relation to the article "the" and may be used interchangeably with "one or more." Additionally, the terms "set" and "group" as used herein are intended to include one or more items and may be used interchangeably with "one or more." When only one item is intended, the phrase "only one" or similar language is used. Additionally, terms such as "has," "have," and "having" as used herein are intended to be open-ended terms that do not limit the elements they modify (e.g., an element that "has" A may also have B). Additionally, the phrase "based on" is intended to mean "based at least in part on," unless otherwise specified. Also, as used herein, the term "or" is intended to be inclusive when used in a consecutive manner, and may be used interchangeably with "and / or" unless otherwise noted (e.g., when used in combination with "either" or "only one of").

Claims

1. An apparatus for wireless communication in a user equipment (UE), comprising: a memory; one or more processors coupled to the memory; The memory stores instructions executable by the one or more processors, causing the UE to: receive from the base station a first radio resource control (RRC) setup message associated with a first sub-band included in a wideband channel between the UE and the base station, the first RRC setup message indicating a first set of transmission configuration indicator (TCI) states for use on the first sub-band; receive from the base station a second RRC setup message associated with a second sub-band included in the wideband channel, the second RRC setup message indicating a second set of TCI states for use on the second sub-band; store instructions executable by the one or more processors to perform the above. An apparatus.

2. The apparatus according to claim 1, wherein the first set of TCI states includes one or more TCI states associated with a control channel and one or more additional TCI states associated with a data channel.

3. The apparatus according to claim 1, wherein the number of TCI states indicated by each RRC setup message does not exceed the maximum number of TCI states.

4. The memory further stores instructions executable by the one or more processors, causing the UE to: receive from the base station one or more additional RRC setup messages, each additional RRC setup message being associated with an additional sub-band and indicating an additional set of TCI states for use on the additional sub-band; The memory further stores instructions executable by the one or more processors to perform the above. The number of RRC setup messages does not exceed the maximum number of sub-bands. The apparatus according to claim 1.

5. The memory further stores instructions executable by the one or more processors, causing the UE to: receive from the base station a control element indicating a subset of the first set of TCI states for use on the first sub-band; The memory further stores instructions executable by the one or more processors to perform the above. The apparatus according to claim 1.

6. The memory stores instructions executable by the one or more processors, causing the UE to: Cause the base station to receive control information indicating the TCI state in the subset of the first set of TCI states for use on the first sub-band Further comprising instructions executable by the one or more processors, as follows The apparatus according to claim 5 **Claim 7** The memory comprises instructions executable by the one or more processors, which cause the UE Cause the base station to receive a control element indicating a subset of the first set of TCI states, the second set of TCI states, or a combination thereof for use on the first sub-band or the second sub-band Further comprising instructions executable by the one or more processors, as follows The apparatus according to claim 1 **Claim 8** The memory comprises instructions executable by the one or more processors, which cause the UE Cause the base station to receive control information indicating the TCI state in the subset and indicating the first sub-band Further comprising instructions executable by the one or more processors, as follows The apparatus according to claim 7 **Claim 9** The subset indicated by the control element is further selected from the one or more additional sets of TCI states for use on one or more additional sub-bands associated with the one or more additional sets of TCI states. The apparatus according to claim 7 **Claim 10** An apparatus for wireless communication in a base station, comprising A memory One or more processors coupled to the memory The memory comprises instructions executable by the one or more processors, which cause the base station Transmit a first radio resource control (RRC) setup message to the UE, which is associated with a first sub-band included in a broadband channel between the user equipment (UE) and the base station and indicates a first set of transmission configuration indicator (TCI) states for use on the first sub-band Transmit a second RRC setup message to the UE, which is associated with a second sub-band included in the broadband channel and indicates a second set of TCI states for use on the second sub-band Store instructions executable by the one or more processors, as follows Apparatus **Claim 11** The memory comprises instructions executable by the one or more processors, which cause the base station One or more additional RRC configuration messages, each additional RRC configuration message being associated with an additional subband and indicating an additional set of TCI states for use on the additional subband, causing the one or more additional RRC configuration messages to be transmitted to the UE, further comprising instructions executable by the one or more processors, wherein the number of RRC configuration messages does not exceed the maximum number of subbands, The apparatus according to claim 10.

12. The memory includes instructions executable by the one or more processors, causing the base station to, transmit to the UE a control element indicating a subset of the first set of TCI states for use on the first subband, further comprising instructions executable by the one or more processors, The apparatus according to claim 10.

13. The memory includes instructions executable by the one or more processors, causing the base station to, transmit to the UE control information indicating a TCI state among the subset of the first set of TCI states for use on the first subband, further comprising instructions executable by the one or more processors, The apparatus according to claim 12.

14. The memory includes instructions executable by the one or more processors, causing the base station to, transmit to the UE a control element indicating a subset of the first set of TCI states, the second set of TCI states, or a combination thereof for use on the first subband or the second subband, further comprising instructions executable by the one or more processors, The apparatus according to claim 10.

15. The memory includes instructions executable by the one or more processors, causing the base station to, transmit to the UE control information indicating a TCI state in the subset and indicating the first subband, further comprising instructions executable by the one or more processors, or, The apparatus according to claim 14, wherein the subset indicated by the control element is further selected from the one or more additional sets of TCI states for use on one or more additional subbands associated with the one or more additional sets of TCI states.

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