UE capabilities for TCI state configuration or activation

Abstract

A user equipment (UE) determines UE capabilities associated with a joint downlink (DL) and uplink (UL) transmission configuration indicator (TCI) state, the joint DL and UL TCI state indicating a common beam for communications in DL and UL, and sends an indication of UE capabilities associated with the joint DL and UL TCI state to a base station. The UE may determine a UE capability associated with the UL TCI state of the uplink communication and may send an indication of the UE capability to the base station. The base station receives the UE capabilities and configures or activates one or more joint DL and UL TCI states or UL TCI states based on the UE capabilities.

Description

[0001] This application is a divisional application of a Chinese patent application with an application date of September 9, 2020, an application number of 202080103732.7, and an invention title of "UE Capabilities for TCI State Configuration or Activation". Technical Field

[0002] Broadly speaking, the present disclosure relates to communication systems, and more specifically, to wireless communication including Transmission Configuration Indicator (TCI) states. Background Art

[0003] Wireless communication systems have been widely deployed to provide various telecommunication services such as telephony, video, data, messaging, and broadcasting. A typical wireless communication system may use multiple access technologies that can support communication with multiple users by sharing available system resources. 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, and Time Division Synchronous Code Division Multiple Access (TD-SCDMA) systems.

[0004] Such multiple access technologies have been adopted in various telecommunication standards to provide a common protocol that enables different wireless devices to communicate over a city-wide, national, regional, or even global scale. An exemplary telecommunication standard is 5G New Radio (NR). 5G NR is part of the continuous evolution of mobile broadband released by the Third Generation Partnership Project (3GPP) to meet new requirements associated with latency, reliability, security, scalability (e.g., with Internet of Things (IoT)), and other requirements. 5G NR includes services associated with enhanced mobile broadband (eMBB), massive machine type communication (mMTC), and ultra-reliable low latency communication (URLLC). Some aspects of 5G NR may be based on the 4G Long Term Evolution (LTE) standard. There is a need to further improve 5G NR technology. In addition, these improvements may also be applicable to other multiple access technologies and telecommunication standards that employ these technologies. Summary of the Invention

[0005] To provide a basic understanding of one or more aspects of the present invention, a simple summary of these aspects is given below. This summary section is not an exhaustive overview of all expected aspects, nor is it intended to identify key or important elements of all aspects, or to describe the scope of any or all aspects. Its sole purpose is to present some concepts of one or more aspects in a simple form as a prelude to the detailed description that follows.

[0006] In one aspect of the present disclosure, there is provided a method, a computer-readable medium, and an apparatus for wireless communication at a user equipment (UE). The apparatus determines UE capabilities associated with a joint downlink (DL) and uplink (UL) transmission configuration indicator (TCI) state, the joint DL and UL TCI state indicating a common beam for communication in DL and UL; and transmits an indication of the UE capabilities associated with the joint DL and UL TCI state to a base station.

[0007] In another aspect of the present disclosure, there is provided a method, a computer-readable medium, and an apparatus for wireless communication at a UE. The apparatus determines UE capabilities associated with a UL TCI state, where the UL TCI state indicates a beam for communication in UL; and transmits an indication of the UE capabilities associated with the UL TCI state to a base station.

[0008] In another aspect of the present disclosure, there is provided a method, a computer-readable medium, and an apparatus for wireless communication at a UE. The apparatus receives an indication of UE capabilities associated with a joint DL and UL TCI state from the UE, the joint DL and UL TCI state indicating a common beam for communication in DL and UL. The apparatus configures or activates one or more joint DL and UL TCI states for the UE based on the UE capabilities.

[0009] In another aspect of the present disclosure, there is provided a method, a computer-readable medium, and an apparatus for wireless communication at a base station. The apparatus receives an indication of UE capabilities associated with a UL TCI state from the UE, the UL TCI state indicating a common beam for UL communication. The apparatus configures or activates one or more UL TCI states for the UE based on the UE capabilities.

[0010] To achieve the foregoing and related purposes, one or more aspects include the features specifically recited below in the detailed description and claims. The following description and the drawings detail certain exemplary features of one or more aspects. However, these features are merely illustrative of some of the various ways in which the basic principles of these various aspects may be employed, and this description is intended to include all such aspects and their equivalents. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 is a diagram illustrating an example of a wireless communication system and an access network.

[0012] Figure 2A is a diagram illustrating an example of a first frame in accordance with various aspects of the present disclosure.

[0013] Figure 2BA diagram showing examples of DL channels within a subframe, in accordance with various aspects of the present disclosure.

[0014] Figure 2C A diagram showing an example of a second frame, in accordance with various aspects of the present disclosure.

[0015] Figure 2D A diagram showing examples of UL channels within a subframe, in accordance with various aspects of the present disclosure.

[0016] Figure 3 A diagram showing examples of a base station and a user equipment (UE) in an access network.

[0017] Figure 4 An example communication flow between a UE and a base station, which includes providing UE capability information related to joint DL and UL TCI states.

[0018] Figure 5 An example communication flow between a UE and a base station, which includes providing UE capability information related to UL TCI states.

[0019] Figure 6 A flowchart of a wireless communication method.

[0020] Figure 7 A flowchart of a wireless communication method.

[0021] Figure 8 A diagram showing an example of a hardware implementation for an example device.

[0022] Figure 9 A flowchart of a wireless communication method.

[0023] Figure 10 A flowchart of a wireless communication method.

[0024] Figure 11 A diagram showing an example of a hardware implementation for an example device. Detailed Description

[0025] The following detailed description, presented in conjunction with the accompanying drawings, is only intended to describe various configurations and is not intended to represent that the concepts described herein can be implemented only in these configurations. To provide a thorough understanding of the various concepts, the detailed description includes specific details. However, it will be apparent to those of ordinary skill in the art that these concepts can be implemented without these specific details. In some instances, well-known structures and components are shown in block diagram form to avoid obscuring these concepts.

[0026] Aspects of a telecommunications system are now presented with reference to various apparatuses and methods. These apparatuses and methods will be described in the detailed description below and depicted in the drawings by various blocks, components, circuits, processes, algorithms, etc. (collectively referred to as "elements"). Such elements can be implemented using electronic hardware, computer software, or any combination thereof. Whether such elements are implemented as hardware or software depends upon the particular application and design constraints imposed on the overall system.

[0027] By way of example, an element, or any portion of an element, or any combination of elements, can be implemented as a "processing system" that includes one or more processors. Examples of processors include a microprocessor, a microcontroller, a graphics processing unit (GPU), a central processing unit (CPU), an application processor, a digital signal processor (DSP), a reduced instruction set computing (RISC) processor, a system on a chip (SoC), a baseband processor, a field programmable gate array (FPGA), a programmable logic device (PLD), a state machine, gate logic, discrete hardware circuits, and other suitable hardware configured to perform the various functions described throughout this disclosure. One or more processors in the processing system can execute software. Software should be construed broadly to mean instructions, instruction sets, code, code segments, program code, programs, subprograms, software components, applications, software applications, software packages, routines, subroutines, objects, executable files, execution threads, processes, functions, etc., whether referred to as software, firmware, middleware, microcode, hardware description language, or otherwise.

[0028] Thus, in one or more exemplary embodiments, the functions described herein can be implemented in hardware, software, or any combination thereof. When implemented in software, the functions can be stored or encoded as one or more instructions or code on a computer-readable medium. Computer-readable media includes computer storage media. Storage media can be any available medium that can be accessed by a computer. By way of example, and not limitation, such computer-readable media can include random access memory (RAM), read-only memory (ROM), electrically erasable programmable ROM (EEPROM), optical disk storage, magnetic disk storage, other magnetic storage devices, combinations of the foregoing types of computer-readable media, or any other medium that can be used to store computer-executable code in the form of instructions or data structures and that can be accessed by a computer.

[0029] Figure 1FIG. 0 is a diagram illustrating an example of a wireless communication system and an access network 100. The wireless communication system (which is also referred to as a wireless wide area network (WWAN)) includes a base station 102, a UE 104, an evolved packet core (EPC) 160, and another core network 190 (e.g., a 5G core (5GC)). The base station 102 may include a macro cell (high-power cellular base station) and / or a small cell (low-power cellular base station). The macro cell includes a base station. The small cell includes a femto cell, a pico cell, and a micro cell.

[0030] The base stations 102 configured for 4G LTE (which are collectively referred to as an evolved universal mobile telecommunications system (UMTS) terrestrial radio access network (E-UTRAN)) may interact with the EPC 160 via a first backhaul link 132 (e.g., an S1 interface). The base stations 102 configured for 5G NR (which are collectively referred to as a next-generation RAN (NG-RAN)) may interact with the core network 190 via a second backhaul link 184. In addition to other functions, the base station 102 may perform one or more of the following functions: transmission of user data, wireless channel encryption and decryption, integrity protection, header compression, mobility control functions (e.g., handover, dual connectivity), inter-cell interference coordination, connection establishment and release, load balancing, distribution of non-access stratum (NAS) messages, NAS node selection, synchronization, radio access network (RAN) sharing, multimedia broadcast multicast service (MBMS), user and device tracking, radio access network information management (RIM), paging, positioning, and transmission of alert messages. The base stations 102 may communicate directly or indirectly with each other (e.g., via the EPC 160 or the core network 190) via a third backhaul link 134 (e.g., an X2 interface). The first backhaul link 132, the second backhaul link 184, and the third backhaul link 134 may be wired or wireless.

[0031] Base station 102 can communicate wirelessly with UE 104. Each of the base stations 102 can provide communication coverage for a corresponding geographic coverage area 110. There may be overlapping geographic coverage areas 110. For example, small cell 102’ can have a coverage area 110’ that overlaps with the coverage areas 110 of one or more macro base stations 102. A network including small cells and macro cells can be referred to as a heterogeneous network. In addition, a heterogeneous network can also include a home evolved Node B (HeNB), which can provide services to a restricted group called a closed subscriber group (CSG). The communication link 120 between the base station 102 and the UE 104 can include an uplink (UL) (which is also referred to as a reverse link) transmission from the UE 104 to the base station 102 and / or a downlink (DL) (which is also referred to as a forward link) transmission from the base station 102 to the UE 104. The communication link 120 can use multiple-input multiple-output (MIMO) antenna technology, which includes spatial multiplexing, beamforming, and / or transmit diversity. These communication links can be over one or more carriers. The base station 102 / UE 104 can use up to Y MHz (e.g., 5, 10, 15, 20, 100, 400, etc. MHz) of bandwidth for each carrier allocated in carrier aggregation with a total of up to Yx MHz (x component carriers) for transmission in each direction. These carriers can be adjacent to each other or non-adjacent to each other. The allocation of carriers can be asymmetric with respect to DL and UL (e.g., more or fewer carriers can be allocated for DL compared to UL). These component carriers can include a primary component carrier and one or more secondary component carriers. The primary component carrier can be referred to as the primary cell (PCell), and the secondary component carrier can be referred to as the secondary cell (SCell).

[0032] Some UEs 104 can communicate with each other using device-to-device (D2D) communication links 158. The D2D communication links 158 can use DL / UL WWAN spectrum. The D2D communication links 158 can use one or more sidelink channels, such as the physical sidelink broadcast channel (PSBCH), the physical sidelink discovery channel (PSDCH), the physical sidelink shared channel (PSSCH), and the physical sidelink control channel (PSCCH). D2D communication can be performed through various wireless D2D communication systems (e.g., WiMedia, Bluetooth, ZigBee, Wi-Fi based on the Institute of Electrical and Electronics Engineers (IEEE) 802.11 standard, LTE, or NR).

[0033] The wireless communication system may also include a Wi-Fi Access Point (AP) 150 that communicates with a Wi-Fi Station (STA) 152 via a communication link 154 (e.g., in the 5 GHz unlicensed spectrum, etc.). When communicating in the unlicensed spectrum, the STA 152 / AP 150 may perform a Clear Channel Assessment (CCA) before communicating to determine if the channel is available.

[0034] The small cell 102’ can operate in licensed and / or unlicensed spectrum. When operating in the unlicensed spectrum, the small cell 102’ may adopt NR and use the same unlicensed spectrum (e.g., 5 GHz, etc.) as that used by the Wi-Fi AP 150. The small cell 102’ adopting NR in the unlicensed spectrum can enhance the coverage of the access network and / or increase the capacity of the access network.

[0035] The electromagnetic spectrum is generally subdivided into various categories, frequency bands, channels, etc. based on frequency / wavelength. In 5G NR, two initial operating frequency bands have been identified as the frequency range name FR1 (410 MHz - 7.125 GHz) and FR2 (24.25 GHz - 52.6 GHz). The frequencies between FR1 and FR2 are generally referred to as mid-band frequencies. Although a part of FR1 is greater than 6 GHz, in various documents and articles, FR1 is generally (interchangeably) referred to as the “sub-6 GHz” band. Similar naming issues sometimes occur with FR2. Although it is different from the extremely high frequency (EHF) band (30 GHz - 300 GHz) defined by the International Telecommunication Union (ITU) as the “millimeter wave” band, it is generally (interchangeably) referred to as the “millimeter wave” band in various documents and articles.

[0036] Taking the above aspects into account, unless otherwise explicitly stated, it should be understood that the term “sub-6 GHz” etc. (if used in this document) can broadly represent frequencies less than 6 GHz, which may be within FR1 or may include mid-band frequencies. Additionally, unless otherwise explicitly stated, it should be understood that the term “millimeter wave” etc. (if used in this document) can broadly represent the following frequencies: including mid-band frequencies, which may be within FR2 or may be within the EHF band.

[0037] Base station 102 (whether it is a small cell 102' or a large cell (e.g., a macro base station)) may include and / or may be referred to as an eNB, a gNodeB (gNB), or another type of base station. Some base stations, such as gNB 180, may operate in the traditional sub-6 GHz spectrum at millimeter wave frequencies and / or near millimeter wave frequencies to communicate with UE 104. When gNB 180 operates at millimeter wave or near millimeter wave frequencies, gNB 180 may be referred to as a millimeter wave base station. Millimeter wave base station 180 may utilize beamforming 182 with UE 104 to compensate for this path loss and short communication distance. Both base station 180 and UE 104 may include multiple antennas (e.g., antenna elements, antenna panels, and / or antenna arrays) to facilitate beamforming.

[0038] Base station 180 may transmit a beamformed signal to UE 104 in one or more transmit directions 182'. UE 104 may receive the beamformed signal from base station 180 in one or more receive directions 182". UE 104 may also transmit a beamformed signal to base station 180 in one or more transmit directions. Base station 180 may receive the beamformed signal from UE 104 in one or more receive directions. Base station 180 / UE 104 may perform beam training to determine the optimal receive and transmit directions for each of base station 180 / UE 104. The transmit and receive directions of base station 180 may be the same or different. The transmit and receive directions of UE 104 may be the same or different.

[0039] The EPC 160 may include a Mobility Management Entity (MME) 162, other MMEs 164, a Serving Gateway 166, a Multimedia Broadcast Multicast Service (MBMS) Gateway 168, a Broadcast Multicast Service Center (BM-SC) 170, and a Packet Data Network (PDN) Gateway 172. The MME 162 may communicate with a Home Subscriber Server (HSS) 174. The MME 162 is a control node that processes signaling between the UE 104 and the EPC 160. Generally, the MME 162 provides bearer and connection management. All user Internet Protocol (IP) packets are transported through the Serving Gateway 166, which is itself connected to the PDN Gateway 172. The PDN Gateway 172 provides UE IP address allocation and other functions. The PDN Gateway 172 and the BM-SC 170 are connected to an IP service 176. The IP service 176 may include the Internet, an intranet, an IP Multimedia Subsystem (IMS), a PS Streaming Service, and / or other IP services. The BM-SC 170 may provide functions for MBMS user service provisioning and delivery. The BM-SC 170 may serve as an entry point for content provider MBMS transmissions, may be used to authorize and initiate MBMS bearer services in a Public Land Mobile Network (PLMN), and may be used to schedule MBMS transmissions. The MBMS Gateway 168 may be used to distribute MBMS services to base stations 102 belonging to a Multicast Broadcast Single Frequency Network (MBSFN) area for a particular broadcast service, and may be responsible for session management (start / stop) and collecting charging information related to eMBMS.

[0040] The core network 190 may include an Access and Mobility Management Function (AMF) 192, other AMFs 193, a Session Management Function (SMF) 194, and a User Plane Function (UPF) 195. The AMF 192 may communicate with a Unified Data Management (UDM) 196. The AMF 192 is a control node that processes signaling between the UE 104 and the core network 190. Generally, the AMF 192 provides QoS flow and session management. All user Internet Protocol (IP) packets are transmitted through the UPF 195. The UPF 195 provides UE IP address allocation and other functions. The UPF 195 is connected to an IP service 197. The IP service 197 may include the Internet, an intranet, an IP Multimedia Subsystem (IMS), a Packet Switched (PS) Streaming (PSS) service, and / or other IP services.

[0041] The base station may include and / or be referred to as a gNB, Node B, eNB, access point, base station transceiver, radio base station, radio transceiver, transceiver function, basic service set (BSS), extended service set (ESS), transmission and reception point (TRP), or some other suitable term. The base station 102 provides an access point for the UE 104 to the EPC 160 or the core network 190. Examples of the UE 104 include cellular phones, smart phones, session initiation protocol (SIP) phones, laptop computers, personal digital assistants (PDAs), satellite radio devices, global positioning systems, multimedia devices, video devices, digital audio players (e.g., MP3 players), cameras, game consoles, tablet devices, smart devices, wearable devices, vehicles, electricity meters, air pumps, large or small kitchen appliances, medical devices, implants, sensors / actuators, displays, or any other similar functional devices. Some of the UEs 104 may be referred to as IoT devices (e.g., parking meters, air pumps, toasters, vehicles, heart monitors, etc.). The UE 104 may also be referred to as a station, mobile station, user station, mobile unit, user unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile user station, access terminal, mobile terminal, wireless terminal, remote terminal, handheld device, user agent, mobile client, client, or some other suitable term.

[0042] Refer again to Figure 1, in some aspects, UE 104 may include a TCI state capability component 198 configured to: determine UE capabilities associated with a combined DL and UL TCI state that indicates a common beam for communication in both DL and UL. The TCI state capability component 198 may be configured to send an indication of the UE capabilities associated with the combined DL and UL TCI state to base station 102 or 180. In some examples, the TCI state capability component 198 may be configured to determine UE capabilities associated with a UL TCI state, where the UL TCI state indicates a beam for communication in UL; and send an indication of the UE capabilities associated with the UL TCI state to the base station. Base station 102 or 180 may include a TCI state configuration component 199 configured to: receive from the UE an indication of the UE capabilities associated with the combined DL and UL TCI state that indicates a common beam for communication in both DL and UL. The apparatus configures or activates one or more combined DL and UL TCI states for the UE based on the UE capabilities. In some examples, the TCI state configuration component 199 may be configured to receive from the UE an indication of the UE capabilities associated with a UL TCI state that indicates a common beam for UL communication. The apparatus configures or activates one or more UL TCI states for the UE based on the UE capabilities. Although the following description may focus on 5G NR, the concepts described herein may apply to other similar fields such as LTE, LTE-A, CDMA, GSM, and other wireless technologies.

[0043] Figure 2A FIG. 200 is an example showing a first subframe in the 5G NR frame structure. Figure 2B FIG. 230 is an example showing DL channels in a 5G NR subframe. Figure 2C FIG. 250 is an example showing a second subframe in the 5G NR frame structure. Figure 2D FIG. 280 is an example showing UL channels in a 5G NR subframe. The 5G NR frame structure may be frequency division duplexing (FDD) or time division duplexing (TDD), where in the case of FDD, for a specific set of subcarriers (carrier system bandwidth), the subframes within that set of subcarriers are dedicated to either DL or UL, and in the case of TDD, for a specific set of subcarriers (carrier system bandwidth), the subframes within that set of subcarriers are dedicated to both DL and UL. In Figure 2A , 2CIn the provided example, it is assumed that the 5G NR frame structure is TDD, where subframe 4 is configured with slot format 28 (mostly DL), where D is DL, U is UL, and F is flexibly used between DL / UL, and subframe 3 is configured with slot format 1 (all UL). Although subframes 3 and 4 are shown with slot formats 1 and 28 respectively, any particular subframe can be configured with any one of the various available slot formats 0 - 61. Slot formats 0 and 1 are all DL and UL respectively. The other slot formats 2 - 61 include a mixture of DL, UL, and flexible symbols. The slot format is configured for the UE through the received slot format indicator (SFI) (dynamically configured through downlink control information (DCI), or semi-statically / statically configured through radio resource control (RRC) signaling). It should be noted that the following description also applies to the 5G NR frame structure of TDD.

[0044] Other wireless communication technologies may have different frame structures and / or different channels. A frame (10 ms) can be divided into 10 subframes of the same size (1 ms). Each subframe can include one or more slots. A subframe can also include mini-slots, which can include 7, 4, or 2 symbols. Depending on the slot configuration, each slot can include 7 or 14 symbols. For slot configuration 0, each slot can include 14 symbols, while for slot configuration 1, each slot can include 7 symbols. The symbols on the DL can be cyclic prefix (CP) OFDM (CP - OFDM) symbols. The symbols on the UL can be CP - OFDM symbols (for high throughput scenarios) or discrete Fourier transform (DFT) spread OFDM (DFT - s - OFDM) symbols (also known as single - carrier frequency - division multiple access (SC - FDMA) symbols) (for power - limited scenarios; limited to single - stream transmission). The number of slots within a subframe is based on the slot configuration and the parameter set. For slot configuration 0, the different parameter sets μ0 to 4 allow each subframe to have 1, 2, 4, 8, and 16 slots respectively. For slot configuration 1, the different parameter sets 0 to 2 allow each subframe to have 2, 4, and 8 slots respectively. Thus, for slot configuration 0 and parameter set μ, there are 14 symbols / slot and 2 μ slots / subframe. The subcarrier spacing and symbol length / duration depend on the parameter set. The subcarrier spacing can be equal to 2 μ *15 kHz, where μ is the parameter set from 0 to 4. Thus, the subcarrier spacing for parameter set μ = 0 is 15 kHz, and the subcarrier spacing for parameter set μ = 4 is 240 kHz. The symbol length / duration is inversely proportional to the subcarrier spacing. Figures 2A - 2DAn example of a time slot configuration with 14 symbols per time slot and a parameter set μ = 2 with 4 time slots per subframe is provided. The time slot duration is 0.25 ms, the subcarrier spacing is 60 kHz, and the symbol duration is approximately 16.67 μs. Within a set of frames, there may be one or more different bandwidth parts (BWPs) that are frequency division multiplexed (see Figure 2B ). Each BWP may have a specific parameter set.

[0045] A resource grid is used to represent the frame structure. Each time slot includes a resource block (RB) (which is also referred to as a physical RB (PRB)) that extends over 12 consecutive subcarriers. The resource grid is divided into multiple resource elements (REs). The number of bits carried by each RE depends on the modulation scheme.

[0046] As Figure 2A shown, some of the REs carry reference (pilot) signals (RS) for the UE. The RS may include a demodulation RS (DM-RS) (which is indicated as R for a specific configuration, but other DM-RS configurations are also possible) and a channel state information reference signal (CSI-RS) for channel estimation at the UE. The RS may also include a beam measurement RS (BRS), a beam refinement (BRRS), and a phase tracking RS (PT-RS).

[0047] Figure 2BExamples of various DL channels in a subframe of a frame are shown. The Physical Downlink Control Channel (PDCCH) carries DCI in one or more Control Channel Elements (CCEs) (e.g., 1, 2, 4, 8, or 16 CCEs), each CCE including six Resource Element Groups (REGs), and each REG including 12 consecutive Resource Elements (REs) in an OFDM symbol of one Resource Block (RB). The PDCCH within a Bandwidth Part (BWP) can be referred to as a Control Resource Set (CORESET). The UE is configured to monitor PDCCH candidates in a PDCCH search space (e.g., common search space, UE-specific search space) during a PDCCH monitoring occasion on the CORESET, where the PDCCH candidates have different DCI formats and different aggregation levels. Additional BWPs can be located at higher and / or lower frequencies on the channel bandwidth. The Primary Synchronization Signal (PSS) can be within symbol 2 of a specific subframe of a frame. UE 104 uses the PSS to determine subframe / symbol timing and the physical layer identity. The Secondary Synchronization Signal (SSS) can be located within symbol 4 of a specific subframe of a frame. The UE uses the SSS to determine the physical layer cell identity group number and radio frame timing. Based on the physical layer identity and the physical layer cell identity group number, the UE can determine the Physical Cell Identifier (PCI). Based on the PCI, the UE can determine the location of the aforementioned Demodulation Reference Signal (DM-RS). The Physical Broadcast Channel (PBCH) carrying the Master Information Block (MIB) can be logically combined with the PSS and SSS to form a Synchronization Signal (SS) / PBCH block (also referred to as an SS block (SSB)). The MIB provides the number of RBs in the system bandwidth and the System Frame Number (SFN). The Physical Downlink Shared Channel (PDSCH) carries user data, broadcast system information not transmitted via the PBCH (e.g., System Information Block (SIB)), and paging messages.

[0048] As Figure 2C shown, some of the REs carry DM-RS (indicated as R for a specific configuration, but other DMRS configurations are also possible) for channel estimation at the base station. The UE can transmit DM-RS for the Physical Uplink Control Channel (PUCCH) and DM-RS for the Physical Uplink Shared Channel (PUSCH). The PUSCH DM-RS can be transmitted in the previous one or two symbols of the PUSCH. Depending on whether a short or long PUCCH is transmitted and according to the specific PUCCH format used, the PUCCH DM-RS can be transmitted in different configurations. The UE can transmit a Sounding Reference Signal (SRS). The SRS can be transmitted in the last symbol of a subframe. The SRS can have a comb structure, and the UE can transmit the SRS on one of these comb structures. The base station can use the SRS for channel quality estimation to achieve frequency-dependent scheduling on the UL.

[0049] Figure 2D Examples of various UL channels in a subframe of a frame are shown. The PUCCH can be located at the position indicated in one configuration. The PUCCH carries uplink control information (UCI) such as a scheduling request, a channel quality indicator (CQI), a precoding matrix indicator (PMI), a rank indicator (RI), and a hybrid automatic repeat request (HARQ) ACK / HARQ feedback. The PUSCH carries data, and in addition, the PUSCH can be used to carry a buffer status report (BSR), a power headroom report (PHR), and / or UCI.

[0050] Figure 3 is a block diagram of the communication between the base station 310 and the UE 350 in an access network. In the DL, IP packets from the EPC 160 are provided to the controller / processor 375. The controller / processor 375 implements layer 3 and layer 2 functions. Layer 3 includes the radio resource control (RRC) layer, and layer 2 includes the service data adaptation protocol (SDAP) layer, the packet data convergence protocol (PDCP) layer, the radio link control (RLC) layer, and the media access control (MAC) layer. The controller / processor 375 provides: RRC layer functions associated with the broadcast of system information (e.g., MIB, SIB), RRC connection control (e.g., RRC connection paging, RRC connection establishment, RRC connection modification, and RRC connection release), mobility between radio access technologies (RATs), and measurement configuration for UE measurement reports; PDCP layer functions associated with header compression / decompression, security (encryption, decryption, integrity protection, integrity verification), and handover support functions; RLC layer functions associated with the transfer of upper layer packet data units (PDUs), error correction via ARQ, concatenation, segmentation, and reassembly of RLC service data units (SDUs), resegmentation of RLC data PDUs, and reordering of RLC data PDUs; MAC layer functions associated with the mapping between logical channels and transport channels, multiplexing of MAC SDUs onto transport blocks (TBs), demultiplexing of MAC SDUs from TBs, scheduling information reporting, error correction via HARQ, priority handling, and logical channel prioritization.

[0051] The transmit (TX) processor 316 and the receive (RX) processor 370 implement layer 1 functions associated with various signal processing functions. Layer 1, which includes the physical (PHY) layer, may include error detection for the transmission channel, forward error correction (FEC) coding / decoding of the transmission channel, interleaving, rate matching, mapping to the physical channel, modulation / demodulation of the physical channel, and MIMO antenna processing. The TX processor 316 processes the mapping to the signal constellation based on various modulation schemes (e.g., binary phase shift keying (BPSK), quadrature phase shift keying (QPSK), M-phase shift keying (M-PSK), M-order quadrature amplitude modulation (M-QAM)). Subsequently, the coded and modulated symbols may be segmented into parallel streams. Subsequently, each stream may be mapped to OFDM subcarriers, multiplexed with reference signals (e.g., pilots) in the time domain and / or frequency domain, and then combined together using an inverse Fourier transform (IFFT) to generate a physical channel carrying a time-domain OFDM symbol stream. The OFDM stream is spatially precoded to generate multiple spatial streams. Channel estimates from the channel estimator 374 may be used to determine the coding and modulation schemes and for spatial processing. The channel estimates may be derived from reference signals transmitted by the UE 350 and / or channel status feedback. Subsequently, each spatial stream may be provided to a different antenna 320 via a separate transmitter 318TX. Each transmitter 318TX may modulate an RF carrier using each spatial stream for transmission.

[0052] At the UE 350, each receiver 354RX receives signals via its respective antenna 352. Each receiver 354RX recovers the information modulated onto the RF carrier and provides the information to the receive (RX) processor 356. The TX processor 368 and the RX processor 356 implement layer 1 functions associated with various signal processing functions. The RX processor 356 may perform spatial processing on the information to recover any spatial streams destined for the UE 350. If multiple spatial streams are destined for the UE 350, the RX processor 356 may combine them into a single OFDM symbol stream. Subsequently, the RX processor 356 uses a fast Fourier transform (FFT) to transform the OFDM symbol stream from the time domain to the frequency domain. The frequency domain signal includes a separate OFDMA symbol stream for each subcarrier of the OFDM signal. The symbols and reference signals on each subcarrier are recovered and demodulated by determining the most likely signal constellation points transmitted by the base station 310. These soft decisions may be based on channel estimates computed by the channel estimator 358. Subsequently, the soft decisions are decoded and deinterleaved to recover the data and control signals initially transmitted by the base station 310 on the physical channel. Subsequently, the data and control signals are provided to the controller / processor 359, which implements layer 3 and layer 2 functions.

[0053] The controller / processor 359 can be associated with a memory 360 that stores program code and data. The memory 360 can be referred to as a computer-readable medium. In the UL, the controller / processor 359 provides demultiplexing between transport channels and logical channels, packet reassembly, decryption, header decompression, and control signal processing to recover IP packets from the EPC 160. The controller / processor 359 is also responsible for error detection using the ACK and / or NACK protocols to support HARQ operations.

[0054] Similar to the functions described in connection with the DL transmission of the base station 310, the controller / processor 359 provides: RRC layer functions associated with system information (e.g., MIB, SIB) acquisition, RRC connection, and measurement reporting; PDCP layer functions associated with header compression / decompression and security (encryption, decryption, integrity protection, integrity verification); RLC layer functions associated with the transfer of upper layer PDUs, error correction via ARQ, concatenation, segmentation, and reassembly of RLC SDUs, resegmentation of RLC data PDUs, and reordering of RLC data PDUs; MAC layer functions associated with the mapping between logical channels and transport channels, multiplexing of MAC SDUs onto TBs, demultiplexing of MAC SDUs from TBs, scheduling information reporting, error correction via HARQ, priority handling, and logical channel prioritization.

[0055] Channel estimators 358 can derive channel estimates from reference signals or feedback sent by the base station 310, which can be used by the TX processor 368 to select appropriate coding and modulation schemes and to facilitate spatial processing. The spatial streams generated by the TX processor 368 can be provided to different antennas 352 via their respective transmitters 354TX. Each transmitter 354TX can modulate the RF carrier using its respective spatial stream for transmission.

[0056] In a manner similar to that described in connection with the receiver function at the UE 350, the base station 310 processes UL transmissions. Each receiver 318RX receives signals via its respective antenna 320. Each receiver 318RX recovers the information modulated onto the RF carrier and provides this information to the RX processor 370.

[0057] The controller / processor 375 may be associated with a memory 376 that stores program code and data. The memory 376 may be referred to as a computer-readable medium. In the UL, the controller / processor 375 provides demultiplexing between transport channels and logical channels, packet reassembly, decryption, header decompression, control signal processing to recover IP packets from the UE 350. The IP packets from the controller / processor 375 may be provided to the EPC 160. The controller / processor 375 is also responsible for error detection using the ACK and / or NACK protocols to support HARQ operations.

[0058] At least one of the TX processor 368, RX processor 356, and controller / processor 359 may be configured to perform aspects related to Figure 1 the TCI state capability component 198 of

[0059] At least one of the TX processor 316, RX processor 370, and controller / processor 375 may be configured to perform aspects related to Figure 1 the TCI state configuration component 199 of

[0060] Enhanced multi-beam operation is needed, e.g., mainly for FR2 and also applicable to FR1. To enhance multi-beam operation, features can be identified and specified to facilitate more efficient (lower latency and overhead) DL / UL beam management, thus supporting higher in-layer and layer 1 / layer 2-centric inter-cell mobility and / or a larger number of configured TCI states. A common beam for DL and UL data and control transmission / reception (especially a common beam for in-band CA) can be specified to provide a unified TCI framework for DL and UL beam indication. An enhancement of the signaling mechanism for the above features can be provided to improve latency and efficiency by using more dynamic control signaling (compared to RRC). Additionally, features can be identified and specified to facilitate UL beam selection for UEs equipped with multiple panels, considering mitigation of UL coverage loss due to maximum allowable exposure (MPE), based on UL beam indication and a unified TCI framework for UL fast panel selection.

[0061] Aspects presented herein implement a unified TCI framework for DL and UL beam indication. The unified TCI framework can be used to signal a common beam for multiple DL and UL resources to save beam indication and overhead latency. The common beam indication can be signaled via a joint DL / UL TCI state. Activation of the joint DL / UL TCI state is described herein in the case of a single DCI scheduling DL / UL for multiple TRPs.

[0062] Figure 4Call flow diagram 400 shows a joint DL / UL TCI state for activating DL and / or UL communication between UE 402 and base station 404.

[0063] In some examples, the UE can communicate with multiple TRPs (e.g., 406, 408, 410) associated with a single scheduling DCI 414 from one TRP 406, where the TRP 406 schedules the UE 402 for DL / UL with multiple TRPs 406, 408, and 410 of the base station (BS) 404. Although TRP 406 is used as an example here, the MAC-CE 412 or DCI 414 can be sent from any other TRP associated with the BS 404 (e.g., TRP 408 or 410). In some examples, the UE 402 can communicate with the base station 404 via multiple TRPs (e.g., 406, 408, 410) based on multiple DCIs (e.g., DCI 414 and 415). In some examples, the UE can communicate with the base station via a single TRP 406.

[0064] At 407, the UE can determine UE capabilities related to the joint DL / UL TCI state for communicating with the base station 404 and can indicate the UE capabilities 409 to the base station 404. At 411, the base station 404 can use the UE capabilities 409 to configure one or more joint DL / UL TCI states for the UE 402. For example, the base station 404 can configure a set of joint DL / UL TCI states in the RRC signaling for the UE 402. At 412, the base station 404 can activate one or more joint DL / UL TCI states of the UE. For example, the base station can send a MAC-CE or other downlink signal that indicates one or more of the configured joint DL / UL TCI states activated for the UE. Each activated joint DL / UL TCI state indicates a common beam (receive (Rx) / transmit (Tx) beam) for communication in the DL / UL. The UE 402 receives one or more DCIs 414 and / or 415 from the TRP 406, which schedule communication via the DL / UL with at least one of the TRPs 406, 408, and / or 410. The UE 402 communicates 416 via the scheduled DL / UL with at least one of the TRPs 406, 408, and / or 410 based on the activated joint DL / UL TCI state.

[0065] In some examples, the UE 402 may indicate UE capabilities 409 for a single TRP (e.g., TRP 406). The UE capabilities 409 may include any of the following: the maximum number of configured joint DL and UL TCI states per bandwidth part (BWP) of each component carrier (CC), the maximum number of activated joint DL and UL TCI states per BWP of each CC, the maximum number of configured joint DL and UL TCI states across all CCs, and / or the maximum number of activated joint DL and UL TCI states across all CCs. The UE capabilities 409 may be used for data and control in both the downlink and the uplink. In some examples, the base station 404 may configure a list of one or more CCs 407 for the UE. The base station 404 may configure the CC list 407 in the RRC signaling to the UE 402. The UE 402 may indicate the UE capabilities 409 for the following: the maximum number of configured joint DL and UL TCI states across all CCs in the configured CC list, and / or the maximum number of activated joint DL and UL TCI states across all CCs in the configured CC list.

[0066] In some examples, the UE 402 may indicate UE capabilities 409 based on multiple DCIs (multi-DCIs) for multiple TRPs (e.g., TRPs 406 and 406 that send DCIs 414 and 415, respectively). Such communication may be referred to as multi-TRP communication based on multi-DCIs, where the UE is scheduled by different DCIs to transmit or receive signals associated with different TRPs. The UE capabilities 409 may indicate any of the following: the maximum number of configured joint DL and UL TCI states in each control resource set (CORESET) pool index for each bandwidth part (BWP) of each component carrier (CC), the maximum number of active joint DL and UL TCI states in each CORESET pool index for each BWP of each CC, the maximum number of configured joint DL and UL TCI states across all CORESET pool indexes for each BWP of each CC, the maximum number of active joint DL and UL TCI states across all CORESET pool indexes for each BWP of each CC, the maximum number of configured joint DL and UL TCI states across all CORESET pool indexes for each CC, the maximum number of active joint DL and UL TCI states in each CORESET pool index across all CCs, the maximum number of configured joint DL and UL TCI states across all CCs across all CORESET pool indexes, the maximum number of active joint DL and UL TCI states across all CCs across all CORESET pool indexes, the first support for the default DL and UL TCI states for each CORESET pool index of each BWP of each CC, and / or the second support for the default DL and UL TCI states for each CORESET pool index across all CCs. The UE capabilities 409 may be used for data and control in both the downlink and uplink. In some examples, the base station 404 may configure a list 407 of one or more CCs for the UE. The UE capabilities 409 may be indicated for the CCs in the CC list 407. For example, the UE may indicate capabilities such as the maximum number of configured joint DL and UL TCI states across all CORESET pool indexes for all CCs in the CC list, the maximum number of active joint DL and UL TCIs across all CORESET pool indexes for all CCs in the CC list, the maximum number of configured joint DL and UL TCI states across all CORESET pool indexes for all CCs in the CC list, the maximum number of active joint DL and UL TCI states across all CORESET pool indexes for all CCs in the CC list, and / or the support for the default DL and UL TCI states for each CORESET pool index across all CCs in the CC list.

[0067] In some examples, the UE 402 may indicate UE capabilities 409 for multiple TRPs (e.g., TRP 406, 408, and / or 410) based on a single DCI 414. Such communication may be referred to as single-DCI-based multi-TRP communication, where the UE is scheduled by a single DCI to transmit or receive signals associated with different TRPs. The UE 402 may indicate UE capabilities 409 for any of the following: the maximum number of configured combined DL and UL TCI states of TCI code points of a resource allocation scheme mapped to multiple TRPs scheduled by the scheduling DCI, support for default TCI code points for multiple combined DL and UL TCI states for each BWP mapped to each CC, and / or support for default TCI code points for multiple combined DL and UL TCI states mapped to all CCs. The UE may indicate the maximum number of combined DL / UL TCI states mapped to a TCI code point for different schemes of resource allocation across multiple TRPs scheduled by the scheduling DCI. Different schemes may include any one of frequency-division multiplexing (FDM), space-division multiplexing (SDM), or time-division multiplexing (TDM). For example, the maximum number may be indicated for a micro-slot-based TDM scheme or a slot-based TDM scheme. In some examples, the base station 404 may configure one or more CC lists 407 for the UE. The UE capabilities 409 may be indicated for the CCs in the CC list 407. For example, the UE 402 may indicate UE capabilities 409 for supporting default TCI code points for multiple combined DL and UL TCI states mapped to all CCs in the configured CC list. The default TCI code point may be applied to a scheduled transmission or reception associated with a TRP, where no TCI associated with the scheduled transmission or reception is explicitly indicated, and the TCI mapped to the default TCI code point is applied to the corresponding scheduled transmission or reception.

[0068] In some examples, the UE 402 may indicate UE capabilities 409 for simultaneous combined DL / UL TCI state activation across CCs. The UE 402 may support the activation of combined DL / UL TCI states across multiple CCs. For example, if the base station 404 activates the combined DL / UL TCI state of one of the CCs in the configured CC list 407, the UE 402 may support applying the combined DL / UL TCI state to each CC in the configured list.

[0069] UE 402 may indicate UE capabilities 409 for inter-cell mobility based on layer 1 (L1) or layer 2 (L2) based on combined DL and UL TCI states. For example, for combined DL and UL TCI states, the UE may support reference signals or channels of non-serving cells. The reference signals or channels of non-serving cells may provide various DL quasi co-location (QCL) assumptions or uplink spatial relation information for combined DL and UL TCI states.

[0070] UE 402 may indicate UE capabilities 409 for updating combined DL and UL TCI states via at least one of MAC-CE or DCI. This update may correspond to the activation / deactivation of combined DL and UL TCI states in the MAC-CE message or DCI. The UE may indicate support for DCI-based combined DL / UL TCI state updates. UE 402 may indicate support for MAC-CE-based combined DL / UL TCI state updates.

[0071] UE 402 may indicate UE capabilities 409 for a subset of one or more channels and / or a subset of one or more reference signals, where both subsets can be updated with combined DL / UL TCI states. For example, the UE may indicate UE capabilities 409 for one or more of the following: PDCCH, PDSCH scheduled by DCI, semi-persistent scheduling (SPS) transmissions, periodic channel state information reference signals (CSI-RS), semi-persistent CSI-RS, aperiodic CSI-RS, positioning reference signals, periodic PUCCH, semi-persistent PUCCH, aperiodic PUCCH, PUSCH, sounding reference signals (SRS), or physical random access channel (PRACH).

[0072] In some examples, the SRS can be a source RS in a downlink-only TCI state or a combined DL / UL TCI state, used to indicate the UE spatial receive (Rx) filter. The UE spatial receive (Rx) filter can indicate, for example, the QCL type D assumption based on UE capability 409. The SRS used as the source RS can be an SRS for different information purposes. For example, it includes an SRS configured for any one of the following: beam management (BM), codebook (CB)-based communication (e.g., CB-based uplink MIMO transmission), non-codebook (NCB)-based communication (e.g., NCB uplink MIMO transmission), and / or antenna switching (e.g., for downlink CSI acquisition). In some examples, based on the TCI state of the SRS as a QCL type D reference signal (e.g., combined DL / UL TCI state), other source reference signals may not be included to provide other QCL assumptions (e.g., QCL type A, QCL type B, or QCL type C assumptions). In some examples, based on the TCI state of the SRS as a QCL type D reference signal (e.g., combined DL / UL TCI state), one or more other reference signals can be indicated to provide other QCL assumptions (e.g., QCL type A, QCL type B, or QCL type C assumptions) for DL / UL communication based on the TCI state.

[0073] At 411, the base station 404 can configure one or more combined DL / UL TCI states for the UE 402 based on the UE capability 409 information provided by the UE. The base station 404 can activate at least one combined DL / UL TCI state of the UE 402 based on the UE capability 409 information received from the UE 402. In some examples, the TCI state can be associated with a reference signal 413 from the base station 404. The base station 404 can schedule downlink and / or uplink communication with the UE 402 using, for example, DCI 414 and / or 415. The UE 402 and the base station 404 can exchange downlink and / or uplink communication 416 based on the active DL and UL TCI states and the resources scheduled by DCI 414 and / or 415.

[0074] Figure 5 An example communication flow between the UE 502 and the base station 504 is shown, which includes an indication of the UE capability 509 associated with the UL TCI state. Similar to Figure 4 , the UE can communicate with a single TRP or with multiple TRPs (e.g., 406, 408, 410). The multi-TRP communication can be based on a single DCI 514 or multiple DCIs 514 and 515.

[0075] At 507, the UE can determine the UE capabilities related to UL TCI states for communicating with the base station 504 and can indicate the UE capabilities 509 to the base station 504. At 511, the base station 504 can use the UE capabilities 509 to configure one or more UL TCI states for the UE 502. For example, the base station 504 can configure a set of UL TCI states in the RRC signaling for the UE 502 based on the UE capabilities 509. At 512, the base station 504 can activate one or more UL TCI states of the UE based on the UE capabilities 509. For example, the base station can send a MAC-CE or other downlink signal that indicates one or more configured UL TCI states activated for the UE. Each activated UL TCI state indicates a beam (transmission (Tx) beam) for uplink communication. The UE 502 receives one or more DCIs 514 and / or 515 from the TRP 506, and these DCIs schedule resources for uplink communication with at least one of the TRPs 506, 508, and / or 510. The UE 502 sends uplink communication 516 with at least one of the TRPs 506, 508, and / or 510 on the scheduled UL resources based on the activated UL TCI states.

[0076] In some examples, the UE 502 can indicate the UE capabilities 509 for a single TRP (e.g., TRP 506). The UE capabilities 509 can include any of the following: the maximum number of configured UL TCI states for each bandwidth part (BWP) of each component carrier (CC), the maximum number of activated UL TCI states for each BWP of each CC, the maximum number of configured UL TCI states across all CCs, and / or the maximum number of activated UL TCI states across all CCs. The UE capabilities 509 can be used for data and control in both the downlink and uplink. In some examples, the base station 504 can configure a list of one or more CCs 507 for the UE. The base station 504 can configure the CC list 507 in the RRC signaling to the UE 502. The UE 502 can indicate the UE capabilities 509 for the maximum number of configured UL TCI states across all CCs in the configured CC list and / or the maximum number of activated UL TCI states across all CCs in the configured CC list.

[0077] In some examples, the UE 502 may indicate UE capabilities 509 based on multiple DCIs (multi-DCIs) for multiple TRPs (e.g., TRPs 506 and 506 that send DCIs 514 and 515, respectively). Such communication may be referred to as multi-DCI-based multi-TRP communication. The UE capabilities 509 may indicate any of the following: the maximum number of configured UL TCI states in each control resource set (CORESET) pool index for each bandwidth part (BWP) of each component carrier (CC), the maximum number of active UL TCI states in each CORESET pool index for each BWP of each CC, the maximum number of configured UL TCI states across all CORESET pool indexes for each BWP of each CC, the maximum number of active UL TCI states across all CORESET pool indexes for each BWP of each CC, the maximum number of configured UL TCI states in each CORESET pool index across all CCs, the maximum number of active UL TCI states in each CORESET pool index across all CCs, the maximum number of configured UL TCI states across all CCs across all CORESET pool indexes, the maximum number of active UL TCI states across all CCs across all CORESET pool indexes, support for the default UL TCI state for each CORESET pool index of each CC, and / or support for the default UL TCI state for each CORESET pool index across all CCs. The UE capabilities 509 may be used for data and control in both the downlink and uplink. In some examples, the base station 504 may configure a list 507 of one or more CCs for the UE. The UE capabilities 509 may be indicated for the CCs in the CC list 507. For example, the UE may indicate capabilities such as the maximum number of configured UL TCI states in each CORESET pool index across all CCs in the CC list, the maximum number of active UL TCI states in each CORESET pool index across all CCs in the CC list, the maximum number of configured UL TCI states across all CORESET pool indexes across all CCs in the CC list, the maximum number of active UL TCI states across all CORESET pool indexes across all CCs in the CC list, and / or support for the default UL TCI state for each CORESET pool index across all CCs in the CC list. The default TCI code point is applied to the scheduled transmission associated with the TRP where no TCI associated with the scheduled transmission is explicitly indicated, and the TCI mapped to the default TCI code point is applied to the corresponding scheduled transmission.

[0078] In some examples, the UE 502 may indicate UE capabilities 509 for multiple TRPs (e.g., TRP 506, 508, and / or 510) based on a single DCI 514. Such communication may be referred to as single-DCI-based multi-TRP communication. The UE 502 may indicate UE capabilities 509 for any of the following: the maximum number of UL TCI states of the configuration of TCI code points of a resource allocation scheme mapped to multiple TRPs scheduled by the scheduling DCI, support for default TCI code points for multiple UL TCI states for each BWP mapped to each CC, and / or support for default TCI code points for multiple UL TCI states mapped to all CCs. The UE may indicate the maximum number of UL TCI states mapped to a TCI code point for different schemes of resource allocation across multiple TRPs scheduled by the scheduling DCI. Different schemes may include any one of FDM, SDM, or TDM. For example, the maximum number may be indicated for a micro-slot-based TDM scheme or a slot-based TDM scheme. In some examples, the base station 404 may configure one or more CC lists 507 for the UE. The UE capabilities 509 may be indicated for the CCs in the CC list 507. For example, the UE502 may indicate UE capabilities 509 to support default TCI code points for multiple UL TCI states mapped to all CCs in the configured CC list.

[0079] In some examples, the UE 502 may indicate UE capabilities 509 for simultaneously activating UL TCI states across CCs. The UE 502 may support activating UL TCI states on multiple CCs. For example, if the base station 504 activates the UL TCI state of a CC in one of the configured CCL lists 507, the UE 502 may support applying the state of the UL TCI to each CC in the configured list.

[0080] The UE 502 may indicate UE capabilities 509 for L1- or L2-based inter-cell mobility based on the UL TCI state. For example, the UE may support reference signals or channels of non-serving cells for the UL TCI state. The reference signals or channels of non-serving cells may provide various DL QCL assumptions or uplink spatial relation information for the UL TCI state.

[0081] The UE 502 may indicate UE capabilities 509 for updating the UL TCI state through at least one of MAC-CE or DCI. The update may correspond to the activation / deactivation of the UL TCI state in the MAC-CE message or DCI. The UE may indicate support for DCI-based UL TCI state updates. The UE 502 may indicate support for MAC-CE-based UL TCI state updates.

[0082] The UE 502 may indicate UE capabilities 509 for a subset of one or more channels and / or a subset of one or more reference signals. For example, the UE may indicate UE capabilities 509 for one or more of the following: periodic PUCCH, semi-persistent PUCCH, aperiodic PUCCH, PUSCH, SRS, or PRACH.

[0083] Figure 6 is a flowchart 600 of a wireless communication method. The method may be performed by a UE (e.g., UE 104, 350, 402, 502; apparatus 802). Dashed lines are used to indicate optional aspects. The method may enable the UE to provide information to the network to assist the network in configuring and / or activating the UE's joint DL and UL TCI states.

[0084] At 604, the UE determines UE capabilities associated with a joint DL and UL TCI state that indicates a common beam for communication in DL and UL. The determination of UE capabilities may be performed, for example, by a determination component 840 of a communication manager 832 of apparatus 802.

[0085] At 606, the UE sends an indication of the UE capabilities associated with the joint DL and UL TCI state to the base station. For example, Figure 4 shows an example of the UE 402 sending UE capabilities 409 to the base station 404. The transmission of the indication of UE capabilities may be performed, for example, by a TCI state capabilities component 842 of a communication manager 832 of apparatus 802.

[0086] The UE capabilities may be for a single TRP and may include at least one of the following: a first maximum number of configured joint DL and UL TCI states for each BWP of each CC, a second maximum number of activated joint DL and UL TCI states for each BWP of each CC, a third maximum number of configured joint DL and UL TCI states across all CCs, or a fourth maximum number of activated joint DL and UL TCI states across all CCs. The UE capabilities may be used for data and control.

[0087] As shown at 602, the UE may receive a configuration of a list of one or more CCs, and at 606, the UE may report the following UE capabilities: a third maximum number of configured joint DL and UL TCI states across all CCs in the list of one or more CCs, or a fourth maximum number of activated joint DL and UL TCI states across all CCs in the list of one or more CCs. The reception of the configuration of the CC list may be performed, for example, by a CC component 844 of a communication manager 832 of apparatus 802.

[0088] The UE capabilities can be used for multiple TRPs based on multiple downlink control information (multi-DCI), and can include at least one of the following: a first maximum number of configured combined DL and UL TCI states for each CORESET pool index of each BWP of each CC, a second maximum number of active combined DL and UL TCI states for each CORESET pool index of each BWP of each CC, a third maximum number of configured combined DL and UL TCI states across all CORESET pool indexes of each BWP of each CC, a fourth maximum number of active combined DL and UL TCI states across all CORESET pool indexes of each BWP of each CC, a fifth maximum number of configured combined DL and UL TCI states for each CORESET pool index across all CCs, a sixth maximum number of active combined DL and UL TCI states for each CORESET pool index across all CCs, a seventh maximum number of configured combined DL and UL TCI states across all CCs across all CORESET pool indexes, an eighth maximum number of active combined DL and UL TCI states across all CCs across all CORESET pool indexes, a first support for default DL and UL TCI states for each CORESET pool index of each BWP of each CC, or a second support for default DL and UL TCI states for each CORESET pool index across all CCs. The UE capabilities can be used for data and control.

[0089] As shown at 602, the UE can receive a configuration of a list of one or more CCs, and the UE reports UE capabilities of at least one of the following: a fifth maximum number of configured combined DL and UL TCI states for each CORESET pool index across all CCs in the list of one or more CCs, a sixth maximum number of active combined DL and UL TCI states for each CORESET pool index across all CCs in the list of one or more CCs, a seventh maximum number of configured combined DL and UL TCI states across all CCs in the list of one or more CCs across all CORESET pool indexes, an eighth maximum number of active combined DL and UL TCI states across all CCs in the list of one or more CCs across all CORESET pool indexes, or a second support for default DL and UL TCI states for each CORESET pool index across all CCs.

[0090] The UE capabilities can be used for multiple TRPs based on a single DCI and can include at least one of the following: the maximum number of configured combined DL and UL TCI states of TCI code points for a resource allocation scheme mapped to multiple TRPs scheduled by the scheduled DCI, the first support for default TCI code points for multiple combined DL and UL TCI states mapped to each BWP of each CC, or the second support for default TCI code points for multiple combined DL and UL TCI states mapped to all CCs. For example, the resource allocation scheme can be based on FDM, SDM, or TDM.

[0091] As shown at 602, the UE can receive a configuration of one or more CC lists, and the UE can report the UE capabilities of the second support for default TCI code points for multiple combined DL and UL TCI states mapped to all CCs across one or more CC lists.

[0092] The UE capabilities can be used to activate combined DL and UL TCI states across multiple CCs. As shown at 602, the UE can receive a configuration of one or more CC lists, and at 606, the UE can report that the UE capabilities are used to activate combined DL and UL TCI states on multiple CCs in one or more CC lists.

[0093] UE capabilities can include L1- or L2-based inter-cell mobility based on combined DL and UL TCI states. UE capabilities can include: support for reference signals or channels of non-serving cells for combined DL and UL TCI states. The reference signals or channels of non-serving cells can provide one or more of DL quasi-co-location assumptions or uplink spatial relation information for combined DL and UL TCI states.

[0094] UE capabilities can be used to update combined DL and UL TCI states via at least one of MAC-CE or DCI. The UE capabilities can be used for one or more of the following: PDCCH, PDSCH scheduled by DCI, SPS transmission, PRS, periodic CSI-RS, aperiodic CSI-RS, semi-persistent CSI-RS, periodic PUCCH, aperiodic PUCCH, and / or PRACH.

[0095] UE capabilities can be associated with an SRS that is a source reference signal. The SRS can be a source reference signal for downlink communication (e.g., downlink only). A joint DL and UL TCI state can indicate a UE spatial reception filter associated with the SRS and based on UE capabilities. The SRS can be used for one or more of the following: beam management, codebook-based communication, non-codebook-based communication, or antenna switching. The joint DL and UL TCI state can indicate the SRS as a QCL type D reference signal. The joint DL and UL TCI state can also include: at least one additional reference signal for different QCL assumptions.

[0096] At 608, the UE can receive configuration, activation, and / or deactivation of one or more joint DL and UL TCI states based on UE capabilities. For example, Figure 4 An example is shown where UE 402 is configured with a set of joint DL and UL TCI states based on UE capabilities, and an activation of the joint DL and UL TCI state received by the UE based on UE capabilities is shown. The reception of the joint DL and UL TCI state configuration can be performed, for example, by the TCI state configuration component 846 of the communication manager 832 in device 802. The activation / deactivation of the joint DL and UL TCI state can be performed, for example, by the TCI state activation component 848 of the communication manager 832 in device 802 in response to an indication from base station 102 or 180 to activate / deactivate the joint DL and UL TCI state.

[0097] Figure 7 It is a flowchart 700 of a wireless communication method. The method can be performed by a UE (e.g., UE 104, 350, 402, 502; device 802). Dashed lines are used to indicate optional aspects. The method can enable the UE to provide information to the network to assist the network in configuring and / or activating the UL TCI state of the UE.

[0098] At 704, the UE determines UE capabilities associated with a UL TCI state that indicates a beam for uplink communication. The determination of UE capabilities can be performed, for example, by the determination component 840 of the communication manager 832 in device 802.

[0099] At 706, the UE sends an indication of UE capabilities associated with the UL TCI state to the base station. For example, Figure 5 An example is shown where UE 502 sends UE capabilities 509 to base station 504. The transmission of the indication of UE capabilities can be performed, for example, by the TCI state capabilities component 842 of the communication manager 832 in device 802.

[0100] The UE capabilities can be for a single TRP and can include at least one of the following: a first maximum number of configured UL TCI states per BWP per CC, a second maximum number of active UL TCI states per BWP per CC, a third maximum number of configured UL TCI states across all CCs, or a fourth maximum number of active UL TCI states across all CCs. The UE capabilities can be used for data and control.

[0101] As shown at 702, the UE can receive a configuration of a list of one or more CCs, and at 706, the UE can report the following UE capabilities: a third maximum number of configured UL TCI states across all CCs in the list of one or more CCs, or a fourth maximum number of active UL TCI states across all CCs in the list of one or more CCs. Receiving the configuration of the CC list can be performed, for example, by the CC component 844 of the communication manager 832 of the device 802.

[0102] The UE capabilities can be for multiple TRPs based on multiple downlink control information (multi-DCI) and can include at least one of the following: a first maximum number of configured UL TCI states per BWP per CC per CORESET pool index, a second maximum number of active UL TCI states per BWP per CC per CORESET pool index, a third maximum number of configured UL TCI states per BWP per CC across all CORESET pool indexes, a fourth maximum number of active UL TCI states per BWP per CC across all CORESET pool indexes, a fifth maximum number of configured UL TCI states per CORESET pool index across all CCs, a sixth maximum number of active UL TCI states per CORESET pool index across all CCs, a seventh maximum number of configured UL TCI states across all CCs across all CORESET pool indexes, an eighth maximum number of active UL TCI states across all CCs across all CORESET pool indexes, a first support for a default UL TCI state per BWP per CC per CORESET pool index, or a second support for a default UL TCI state per CORESET pool index across all CCs. The UE capabilities can be used for data and control.

[0103] As shown at 702, the UE may receive the configuration of one or more CC lists, and at 706, the UE may report the UE capabilities of at least one of the following: the fifth maximum number of configured UL TCI states of each CORESET pool index across all CCs in one or more CC lists, the sixth maximum number of active UL TCI states of each CORESET pool index across all CCs in one or more CC lists, the seventh maximum number of configured UL TCI states across all CORESET pool indexes across all CCs in one or more CC lists, the eighth maximum number of active UL TCI states across all CORESET pool indexes across all CCs in one or more CC lists, or the second support for the default UL TCI state of each CORESET pool index across all CCs.

[0104] The UE capabilities may be used for multiple TRPs based on a single DCI and may include at least one of the following: the maximum number of configured UL TCI states of the TCI code points of the resource allocation scheme mapped to the multiple TRPs scheduled by the scheduled DCI, the first support for the default TCI code points of the multiple UL TCI states mapped to each BWP of each CC, or the second support for the default TCI code points of the multiple UL TCI states mapped across all CCs. For example, the resource allocation scheme may be based on FDM, SDM, or TDM.

[0105] As shown at 702, the UE may receive the configuration of one or more CC lists, and the UE may report the UE capabilities of the second support for the default TCI code points of the multiple UL TCI states mapped across all CCs in one or more CC lists.

[0106] The UE capabilities may be used to activate UL TCI states across multiple CCs. As shown at 702, the UE may receive the configuration of one or more CC lists, and at 706, the UE may report that the UE capabilities are used to activate UL TCI states on multiple CCs in one or more CC lists.

[0107] UE capabilities may include L1- or L2-based inter-cell mobility based on UL TCI states. UE capabilities may include: support for the reference signal or channel of the non-serving cell for the UL TCI state. The reference signal or channel of the non-serving cell may provide one or more of the DL quasi-co-location assumption or uplink spatial relation information for the UL TCI state.

[0108] UE capabilities can be used to update UL TCI states via at least one of MAC-CE or DCI. The UE capabilities can be used for one or more of the following: periodic PUCCH, aperiodic PUCCH, semi-persistent PUCCH, PUSCH, SRS, and / or PRACH.

[0109] At 708, the UE can receive configuration, activation, and / or deactivation of one or more UL TCI states based on UE capabilities. For example, Figure 5 An example is shown where UE 502 is configured with a set of UL TCI states based on UE capabilities, and the UE receiving activation of a UL TCI state based on UE capabilities. The reception of UL TCI state configuration can be performed, for example, by the TCI state configuration component 846 of the communication manager 832 in device 802. The activation / deactivation of the UL TCI state can be performed, for example, by the TCI state activation component 848 of the communication manager 832 in device 802 in response to an indication from base station 102 or 180 to activate / deactivate the UL TCI state.

[0110] Figure 8FIG. 800 is a diagram illustrating an example of a hardware implementation for apparatus 802. Apparatus 802 is a UE and includes a cellular baseband processor 804 (also referred to as a modem) coupled to a cellular RF transceiver 822, and one or more subscriber identity module (SIM) cards 820, an application processor 806 coupled to a secure digital (SD) card 808 and a screen 810, a Bluetooth module 812, a wireless local area network (WLAN) module 814, a global positioning system (GPS) module 816, and a power supply 818. The cellular baseband processor 804 communicates with UE 104 and / or BS 102 / 180 via the cellular RF transceiver 822. The cellular baseband processor 804 may include a computer-readable medium / memory. The computer-readable medium / memory may be non-transitory. The cellular baseband processor 804 is responsible for general processing, which includes executing software stored on the computer-readable medium / memory. When the software is executed by the cellular baseband processor 804, it causes the cellular baseband processor 804 to perform the various functions described above. The computer-readable medium / memory may also be used to store data manipulated by the cellular baseband processor 804 when executing the software. The cellular baseband processor 804 further includes a receiving component 830, a communication manager 832, and a transmitting component 834. The communication manager 832 includes one or more of the illustrated components. The components within the communication manager 832 may be stored in the computer-readable medium / memory and / or configured as hardware within the cellular baseband processor 804. The cellular baseband processor 804 may be a component of UE 350 and may include at least one of memory 360 and / or TX processor 368, RX processor 356, and controller / processor 359. In one configuration, apparatus 802 may be a modem chip and include only the baseband processor 804, and in another configuration, apparatus 802 may be an entire UE (e.g., see Figure 3 of 350) and include other modules of apparatus 802.

[0111] The communication manager 832 includes a determination component 840 configured to determine UE capabilities associated with combined DL and UL TCI states, e.g., as described in connection with 604, and / or to determine UE capabilities associated with UL TCI states, e.g., as described in connection with 704. The communication manager 832 further includes a TCI state capabilities component 842 configured to send the UE capabilities to the base station 102 or 180, e.g., as described in connection with 606 and / or 706. The communication manager 832 further includes a CC component 844 configured to receive a configuration of one or more CC lists from the base station 102 or 180, e.g., as described in connection with 602 and / or 702. The communication manager 832 further includes a TCI state configuration component 846 configured to receive a configuration of one or more of the combined DL and UL TCI states and / or one or more UL TCI states, e.g., as described in connection with 608 or 708. The communication manager 832 further includes a TCI state activation component 848 configured to receive an activation of one or more of the combined DL and UL TCI states and / or one or more UL TCI states, e.g., as described in connection with 608 or 708.

[0112] The apparatus may include means for performing Figure 6 and / or Figure 7 each block of the algorithms in the foregoing flowcharts and / or aspects performed by Figure 4 and / or Figure 5 UE 402 or 502 in Figure 6 and / or Figure 7 each block of the foregoing flowcharts and / or aspects performed by Figure 4 and / or Figure 5 UE 402 or 502 in

[0113] In one configuration, apparatus 802 (specifically, cellular baseband unit 804) may include: a unit for determining UE capabilities associated with a joint DL and UL TCI state, where the joint DL and UL TCI state indicates a common beam for communication in DL and UL; a unit for sending an indication of the UE capabilities associated with the joint DL and UL TCI state to a base station. Apparatus 802 may further include: a unit for receiving a configuration of one or more CC lists. Apparatus 802 may further include: a unit for receiving a configuration of one or more joint DL and UL TCI states, and / or a unit for activating at least one joint DL and UL TCI state based on UE capabilities. Apparatus 802 may include: a unit for determining UE capabilities associated with a UL TCI state, where the UL TCI state indicates a common beam for communication in UL; a unit for sending an indication of the UE capabilities associated with the UL TCI state to a base station. Apparatus 802 may further include: a unit for receiving a configuration of one or more CC lists. Apparatus 802 may further include: a unit for receiving a configuration of one or more UL TCI states, and / or a unit for activating at least one UL TCI state based on UE capabilities. These foregoing units may be one or more of the foregoing components of apparatus 802 configured to perform the functions described by these foregoing units. As described above, apparatus 802 may include TX processor 368, RX processor 356, and controller / processor 359. Thus, in one configuration, these foregoing units may be TX processor 368, RX processor 356, and controller / processor 359 configured to perform the functions stated by these foregoing units.

[0114] Figure 9 FIG. 900 is a flowchart of a wireless communication method. The method may be performed by a base station (e.g., base station 102, 180, 310, 404, or 504; apparatus 1102). Optional aspects are shown using dashed lines. The method may enable the configuration and / or activation of a joint DL and UL TCI state of a UE based on UE capabilities indicated to the base station.

[0115] At 904, the base station receives an indication of UE capabilities associated with a joint DL and UL TCI state, where the joint DL and UL TCI state indicates a common beam for communication in DL and UL. The reception of the indication of UE capabilities may be performed, for example, by TCI state capabilities component 1142 of communication manager 1132 of apparatus 1102. Figure 4 An example of base station 404 receiving UE capabilities 409 for a joint DL and UL TCI state is shown.

[0116] At 906, the base station configures or activates, based on UE capabilities, one or more combined DL and UL TCI states. The configuration of the combined DL and UL TCI states can be performed, for example, by the TCI state configuration component 1146 of the communication manager 1132 in the apparatus 1102. The activation / deactivation of the combined DL and UL TCI states can be performed, for example, by the TCI state activation component 1148 of the communication manager 1132 in the apparatus 1102. Figure 4 An example is shown in which the base station 404 configures and activates one or more combined DL and UL TCI states based on UE capabilities.

[0117] The UE capabilities can be for a single TRP and can include at least one of the following: a first maximum number of configured combined DL and UL TCI states per BWP per CC, a second maximum number of activated combined DL and UL TCI states per BWP per CC, a third maximum number of configured combined DL and UL TCI states across all CCs, or a fourth maximum number of activated combined DL and UL TCI states across all CCs. The UE capabilities can be used for data and control.

[0118] As shown at 902, the base station can configure one or more CC lists, and the UE capabilities received at 904 can be for: a third maximum number of configured combined DL and UL TCI states across all CCs in one or more CC lists, or a fourth maximum number of activated combined DL and UL TCI states across all CCs in one or more CC lists. The configuration of the CC lists can be performed, for example, by the CC component 1144 of the communication manager 1132 of the apparatus 1102.

[0119] The UE capability can be used for multiple TRPs based on multiple downlink control information (multi-DCI), and can include at least one of the following: a first maximum number of configured combined DL and UL TCI states for each CORESET pool index of each BWP of each CC, a second maximum number of active combined DL and UL TCI states for each CORESET pool index of each BWP of each CC, a third maximum number of configured combined DL and UL TCI states across all CORESET pool indexes of each BWP of each CC, a fourth maximum number of active combined DL and UL TCI states across all CORESET pool indexes of each BWP of each CC, a fifth maximum number of configured combined DL and UL TCI states for each CORESET pool index across all CCs, a sixth maximum number of active combined DL and UL TCI states for each CORESET pool index across all CCs, a seventh maximum number of configured combined DL and UL TCI states across all CCs across all CORESET pool indexes, an eighth maximum number of active combined DL and UL TCI states across all CCs across all CORESET pool indexes, a first support for default DL and UL TCI states for each CORESET pool index of each BWP of each CC, or a second support for default DL and UL TCI states for each CORESET pool index across all CCs. The UE capability can be used for data and control.

[0120] As shown at 902, the base station can configure one or more CC lists, and the UE capabilities received at 904 are for at least one of the following: a fifth maximum number of configured combined DL and UL TCI states for each CORESET pool index across all CCs in one or more CC lists, a sixth maximum number of active combined DL and UL TCI states for each CORESET pool index across all CCs in one or more CC lists, a seventh maximum number of configured combined DL and UL TCI states across all CCs in one or more CC lists across all CORESET pool indexes, an eighth maximum number of active combined DL and UL TCI states across all CCs in one or more CC lists across all CORESET pool indexes, or a second support for default DL and UL TCI states for each CORESET pool index across all CCs.

[0121] The UE capabilities can be used for multiple TRPs based on a single DCI and can include at least one of the following: the maximum number of configured combined DL and UL TCI states of TCI code points of a resource allocation scheme mapped to multiple TRPs scheduled by the scheduled DCI, a first support for default TCI code points of multiple combined DL and UL TCI states mapped to each BWP of each CC, or a second support for default TCI code points of multiple combined DL and UL TCI states mapped to all CCs. For example, the resource allocation scheme can be based on FDM, SDM, or TDM.

[0122] As shown at 902, the base station can configure one or more CC lists, and the UE capabilities received at 904 can be for: a second support for default TCI code points of multiple combined DL and UL TCI states mapped to all CCs across one or more CC lists.

[0123] The UE capabilities can be used to activate combined DL and UL TCI states across multiple CCs. As shown at 902, the base station can configure one or more CC lists, and the UE capabilities received at 904 can be used to activate combined DL and UL TCI states on multiple CCs in one or more CC lists.

[0124] UE capabilities can include L1- or L2-based inter-cell mobility based on combined DL and UL TCI states. UE capabilities can include: support for reference signals or channels of non-serving cells for combined DL and UL TCI states. The reference signals or channels of non-serving cells can provide one or more of DL quasi-co-location assumptions or uplink spatial relation information for combined DL and UL TCI states.

[0125] UE capabilities can be used to update combined DL and UL TCI states via at least one of MAC-CE or DCI. The UE capabilities can be used for one or more of the following: PDCCH, PDSCH scheduled by DCI, SPS transmission, PRS, periodic CSI-RS, aperiodic CSI-RS, semi-persistent CSI-RS, periodic PUCCH, aperiodic PUCCH, semi-persistent PUCCH, PUSCH, SRS, and / or PRACH.

[0126] UE capabilities may be associated with an SRS as a source reference signal. The SRS may be a source reference signal for downlink communication (e.g., downlink only). A joint DL and UL TCI state may indicate a UE spatial reception filter associated with the SRS and based on UE capabilities. The SRS may be used for one or more of the following: beam management, codebook-based communication, non-codebook-based communication, or antenna switching. The joint DL and UL TCI state may indicate the SRS as a QCL type D reference signal. The joint DL and UL TCI state may also include: at least one additional reference signal for different QCL assumptions.

[0127] Figure 10 FIG. 1000 is a flowchart of a wireless communication method. The method may be performed by a base station (e.g., base station 102, 180, 310, 404, or 504; apparatus 1102). Optional aspects are shown using dashed lines. The method may enable the configuration and / or activation of a joint DL and UL TCI state for a UE based on UE capabilities indicated to the base station.

[0128] At 1004, the base station receives an indication of UE capabilities associated with a UL TCI state that indicates a common beam for UL communication. The reception of the indication of UE capabilities may be performed, for example, by a TCI state capabilities component 1142 of a communication manager 1132 of apparatus 1102. Figure 4 An example is shown in which base station 404 receives UE capabilities 409 for a UL TCI state.

[0129] At 1006, the base station configures or activates one or more UL TCI states based on the UE capabilities. The configuration of the UL TCI states may be performed, for example, by a TCI state configuration component 1146 of a communication manager 1132 in apparatus 1102. The activation / deactivation of the UL TCI states may be performed, for example, by a TCI state activation component 1148 of a communication manager 1132 in apparatus 1102. Figure 4 An example is shown in which base station 404 configures and activates one or more UL TCI states based on UE capabilities.

[0130] UE capabilities may be for a single TRP and may include at least one of the following: a first maximum number of configured UL TCI states per BWP per CC, a second maximum number of active UL TCI states per BWP per CC, a third maximum number of configured UL TCI states across all CCs, or a fourth maximum number of active UL TCI states across all CCs. The UE capabilities may be used for data and control.

[0131] As shown at 1002, the base station may configure one or more CC lists, and the UE capabilities received at 1004 may be for: the third maximum number of configured UL TCI states across all CCs in one or more CC lists, or the fourth maximum number of active UL TCI states across all CCs in one or more CC lists. The configuration of the CC list may be performed, for example, by the CC component 1144 of the communication manager 1132 of the apparatus 1102.

[0132] The UE capabilities may be for multiple TRPs based on multiple downlink control information (multi-DCI), and may include at least one of the following: the first maximum number of configured UL TCI states for each CORESET pool index of each BWP of each CC, the second maximum number of active UL TCI states for each CORESET pool index of each BWP of each CC, the third maximum number of configured UL TCI states across all CORESET pool indexes of each BWP of each CC, the fourth maximum number of active UL TCI states across all CORESET pool indexes of each BWP of each CC, the fifth maximum number of configured UL TCI states for each CORESET pool index across all CCs, the sixth maximum number of active UL TCI states for each CORESET pool index across all CCs, the seventh maximum number of configured UL TCI states across all CORESET pool indexes across all CCs, the eighth maximum number of active UL TCI states across all CORESET pool indexes across all CCs, the first support for the default UL TCI state for each CORESET pool index of each BWP of each CC, or the second support for the default UL TCI state for each CORESET pool index across all CCs. The UE capabilities may be used for data and control.

[0133] As shown at 1002, the base station may configure one or more CC lists, and the UE capabilities received at 1004 are for at least one of the following: the fifth maximum number of configured UL TCI states for each CORESET pool index across all CCs in one or more CC lists, the sixth maximum number of active UL TCI states for each CORESET pool index across all CCs in one or more CC lists, the seventh maximum number of configured UL TCI states across all CORESET pool indexes across all CCs in one or more CC lists, the eighth maximum number of active UL TCI states across all CORESET pool indexes across all CCs in one or more CC lists, or the second support for the default UL TCI state for each CORESET pool index across all CCs.

[0134] The UE capabilities can be used for multiple TRPs based on a single DCI and can include at least one of the following: the maximum number of UL TCI states configured with TCI code points of a resource allocation scheme mapped to multiple TRPs scheduled by the scheduled DCI, the first support for default TCI code points of multiple UL TCI states mapped to each BWP of each CC, or the second support for default TCI code points of multiple UL TCI states mapped to all CCs. For example, the resource allocation scheme can be based on FDM, SDM, or TDM.

[0135] As shown at 1002, the base station can configure one or more CC lists, and the UE capabilities received at 1004 can be for: the second support for default TCI code points of multiple UL TCI states mapped to all CCs across one or more CC lists.

[0136] The UE capabilities can be used to activate joint DL and UL TCI states across multiple CCs. As shown at 1002, the base station can configure one or more CC lists, and the UE capabilities received at 1004 can be used to activate UL TCI states on multiple CCs in one or more CC lists.

[0137] UE capabilities can include L1- or L2-based inter-cell mobility based on UL TCI states. UE capabilities can include: support for reference signals or channels of non-serving cells for UL TCI states. The reference signals or channels of non-serving cells can provide one or more of DL quasi-co-location assumptions or uplink spatial relation information for UL TCI states.

[0138] UE capabilities can be used to update UL TCI states via at least one of MAC-CE or DCI. The UE capabilities can be used for one or more of the following: periodic PUCCH, aperiodic PUCCH, semi-persistent PUCCH, PUSCH, SRS, and / or PRACH.

[0139] Figure 11FIG. 1100 is an example showing a hardware implementation of apparatus 1102. Apparatus 1102 is a BS and includes a baseband unit 1104. The baseband unit 1104 may communicate with a UE 104 via a cellular RF transceiver. The baseband unit 1104 may include a computer-readable medium / memory. The baseband unit 1104 is responsible for general processing, which includes executing software stored on the computer-readable medium / memory. When the software is executed by the baseband unit 1104, it causes the baseband unit 1104 to perform the various functions described above. The computer-readable medium / memory may also be used to store data manipulated by the baseband unit 1104 when executing the software. The baseband unit 1104 further includes a receiving component 1130, a communication manager 1132, and a transmitting component 1134. The communication manager 1132 includes one or more of the illustrated components. The components within the communication manager 1132 may be stored in the computer-readable medium / memory and / or configured as hardware within the baseband unit 1104. The baseband unit 1104 may be a component of BS 310 and may include at least one of a memory 376 and / or a TX processor 316, an RX processor 370, and a controller / processor 375.

[0140] The communication manager 1132 includes a TCI state capability component 1142 configured to receive UE capabilities associated with joint DL and UL TCI states, e.g., as described in connection with 904, and / or receive UE capabilities associated with UL TCI states, e.g., as described in connection with 1004. The communication manager 1132 includes a CC component 1144 configured to send a configuration of one or more CC lists to the UE 104, e.g., as described in connection with 902 and / or 1002. The communication manager 1132 further includes a TCI state configuration component 1146 configured to configure one or more of joint DL and UL TCI states and / or one or more UL TCI states based on UE capabilities, e.g., as described in connection with 906 or 1006. The communication manager 1132 includes a TCI state activation component 1148 configured to activate one or more of joint DL and UL TCI states and / or one or more UL TCI states based on UE capabilities, e.g., as described in connection with 906 and / or 1006.

[0141] The apparatus may include means for performing Figure 9 and Figure 10 each block in the algorithms of the foregoing flowcharts and / or additional components for aspects performed by Figure 4 and / or Figure 5 a base station 404 or 504 in Figure 9 and Figure 10each block in the foregoing flowchart and / or aspects performed by Figure 4 and / or Figure 5 the base station 404 or 504 in Figure 5 can be performed by components, and the apparatus can include one or more of these components. These components can be one or more hardware components specifically configured to perform the stated processing / algorithms, these components can be implemented by a processor configured to perform the stated processing / algorithms, stored in a computer-readable medium for implementation by the processor, or some combination thereof.

[0142] In one configuration, the apparatus 1102 (specifically, the baseband unit 1104) includes: a unit for receiving an indication of UE capabilities associated with a joint DL and UL TCI state, the joint DL and UL TCI state indicating a common beam for communication in DL and UL; a unit for configuring or activating one or more joint DL and UL TCI states for the UE based on the UE capabilities. The apparatus 1102 can also include: a unit for transmitting a configuration of one or more CC lists. The apparatus 1102 can also include: a unit for receiving an indication of UE capabilities associated with a UL TCI state, the UL TCI state indicating a common beam for UL communication; a unit for configuring or activating one or more UL TCI states for the UE based on the UE capabilities. These foregoing units can be one or more of the foregoing components of the apparatus 1102 configured to perform the functions described by these foregoing units. As described above, the apparatus 1102 can include a TX processor 316, an RX processor 370, and a controller / processor 375. Thus, in one configuration, these foregoing units can be the TX processor 316, the RX processor 370, and the controller / processor 375 configured to perform the functions stated by these foregoing units.

[0143] It should be understood that the specific order or block hierarchy in the processing / flowcharts disclosed herein is merely an example of an example method. It should be understood that based on design preferences, the specific order or block hierarchy in these processing / flowcharts can be rearranged. Additionally, some blocks can be combined or omitted. The appended method claims present the elements of the various blocks in an example order, but are not meant to be limited by the specific order or hierarchy presented.

[0144] The various aspects described above are presented to enable any person of ordinary skill in the art to make and use the invention. For those of ordinary skill in the art, various modifications to these aspects will be apparent, and the general principles defined herein may be applied to other aspects as well. Thus, the invention is not limited to the aspects shown herein, but is consistent with the full scope of the invention disclosed herein, where, unless otherwise specified, the singular forms of components are not meant to mean "one and only one" but may be "one or more." Terms such as "if," "when," and "while" should be construed as "under the condition that," rather than implying a direct temporal relationship or reaction. That is, these phrases (e.g., "when") do not mean to take action immediately in response to an action or during the occurrence of an action, but simply mean that if the condition is met, a certain action will occur, without requiring a specific or immediate temporal constraint on the occurrence of that action. The term "exemplary" as used herein means "serving as an example, instance, or illustration." Any aspect described herein as "exemplary" should not be construed as being more preferred or advantageous than other aspects. Unless otherwise specifically stated, the term "some" refers to one or more. Combinations such as "at least one of A, B, or C," "one or more of A, B, or C," "at least one of A, B, and C," "one or more of A, B, and C," and "A, B, C, or any combination thereof," including any combination of A, B, and / or C, may include multiple A's, multiple B's, or multiple C's. Specifically, combinations such as "at least one of A, B, or C," "one or more of A, B, or C," "at least one of A, B, and C," "one or more of A, B, and C," and "A, B, C, or any combination thereof" may be only A, only B, only C, A and B, A and C, B and C, or A and B and C, where any such combination may include one or more members or some members of A, B, or C. All structural and functional equivalents of the components of the various aspects described throughout this disclosure are expressly incorporated herein by reference and are intended to be covered by the claims, and these structural and functional equivalents are known or will be known to those of ordinary skill in the art. Additionally, nothing disclosed herein is intended to be dedicated to the public, whether or not such disclosure is explicitly recited in the claims. Words such as "module," "apparatus," "element," "device," etc. are not substitutes for the word "unit." Thus, the elements of the claims should not be construed as functional modules unless the element is expressly recited using the language of "functional module."

[0145] The following examples are merely illustrative and may be combined with other embodiments or aspects taught herein, without limitation thereto.

[0146] Example 1 is a method for wireless communication of a user equipment (UE), including: determining UE capabilities associated with a joint downlink (DL) and uplink (UL) transmission configuration indicator (TCI) state, where the joint DL and UL TCI state indicates a common beam for communication in DL and UL; and sending an indication of the UE capabilities associated with the joint DL and UL TCI state to a base station.

[0147] In Example 2, the method according to Example 1 further includes that the UE capabilities are for a single transmission reception point (TRP) and include at least one of the following: a first maximum number of configured joint DL and UL TCI states for each bandwidth part (BWP) of each component carrier (CC), a second maximum number of activated joint DL and UL TCI states for each BWP of each CC, a third maximum number of configured joint DL and UL TCI states across all CCs, or a fourth maximum number of activated joint DL and UL TCI states across all CCs.

[0148] In Example 3, the method according to Example 1 or Example 2 further includes that the UE capabilities are for data and control.

[0149] In Example 4, the method according to any one of Examples 1 - 3 further includes: receiving a configuration of one or more CC lists, where the UE reports the third maximum number of configured joint DL and UL TCI states across all CCs in the one or more CC lists, or the UE capabilities of the fourth maximum number of activated joint DL and UL TCI states across all CCs in the one or more CC lists.

[0150] In Example 5, the method according to any one of Examples 1-4 further includes that the UE capability is for multiple transmission reception points (TRPs) based on multiple downlink control information (multi-DCI), and includes at least one of the following: the first maximum number of configured combined DL and UL TCI states for each control resource set (CORESET) pool index of each bandwidth part (BWP) of each component carrier (CC), the second maximum number of activated combined DL and UL TCI states for each CORESET pool index of each BWP of each CC, the third maximum number of configured combined DL and UL TCI states across all CORESET pool indexes of each BWP of each CC, the fourth maximum number of activated combined DL and UL TCI states across all CORESET pool indexes of each BWP of each CC, the fifth maximum number of configured combined DL and UL TCI states for each CORESET pool index across all CCs, the sixth maximum number of activated combined DL and UL TCI states for each CORESET pool index across all CCs, the seventh maximum number of configured combined DL and UL TCI states across all CCs across all CORESET pool indexes, the eighth maximum number of activated combined DL and UL TCI states across all CCs across all CORESET pool indexes, the first support for default DL and UL TCI states for each CORESET pool index of each CC, or the second support for default DL and UL TCI states for each CORESET pool index across all CCs.

[0151] In Example 6, the method according to any one of Examples 1-5 further includes that the UE capability is for data and control.

[0152] In Example 7, the method according to any one of Examples 1-6 further includes: receiving a configuration of one or more CC lists, where the UE reports the UE capability of at least one of the following: the fifth maximum number of configured combined DL and UL TCI states for each CORESET pool index across all CCs in the one or more CC lists, the sixth maximum number of activated combined DL and UL TCI states for each CORESET pool index across all CCs in the one or more CC lists, the seventh maximum number of configured combined DL and UL TCI states across all CCs across all CORESET pool indexes in the one or more CC lists, the eighth maximum number of activated combined DL and UL TCI states across all CCs across all CORESET pool indexes in the one or more CC lists, or the second support for the default DL and UL TCI states for each CORESET pool index across all CCs.

[0153] In Example 8, the method according to any one of Examples 1-7 further includes that the UE capability is for multiple transmission reception points (TRPs) based on a single downlink control information (DCI), and includes at least one of the following: the maximum number of configured combined DL and UL TCI states of TCI code points of a resource allocation scheme mapped to the multiple TRPs scheduled by the scheduled DCI, the first support for the default TCI code points of the multiple combined DL and UL TCI states mapped to each bandwidth part (BWP) of each component carrier (CC), or the second support for the default TCI code points of the multiple combined DL and UL TCI states mapped to all CCs.

[0154] In Example 9, the method according to any one of Examples 1-8 further includes that the resource allocation scheme is based on frequency division multiplexing (FDM), space division multiplexing (SDM), or time division multiplexing (TDM).

[0155] In Example 10, the method according to any one of Examples 1-9 further includes: receiving a configuration of one or more CC lists, where the UE reports the UE capability of the second support for the default TCI code points of the multiple combined DL and UL TCI states mapped to all CCs across the one or more CC lists.

[0156] In Example 11, the method according to any one of Examples 1-10 further includes that the UE capability is for activating the combined DL and UL TCI states across multiple component carriers (CCs).

[0157] In Example 12, the method according to any one of Examples 1-11 further includes: receiving a configuration of one or more CC lists, where the UE reports the UE capability for activating the combined DL and UL TCI states on the multiple CCs in the one or more CC lists.

[0158] In Example 13, the method according to any one of Examples 1-12 further includes that the UE capability includes layer 1 (L1) or layer 2 (L2) based inter-cell mobility based on the combined DL and UL TCI states.

[0159] In Example 14, the method according to any one of Examples 1-13 further includes that the UE capability includes support for the reference signals or channels of non-serving cells of the combined DL and UL TCI states.

[0160] In Example 15, the method according to any one of Examples 1-14 further includes that the reference signal or the channel of the non-serving cell provides one or more of DL quasi-co-location assumptions or uplink spatial relationship information for the joint DL and UL TCI state.

[0161] In Example 16, the method according to any one of Examples 1-15, wherein the UE capability is used to update the joint DL and UL TCI state via at least one of a media access control control element (MAC-CE) or downlink control information (DCI).

[0162] In Example 17, the method according to any one of Examples 1-16, wherein the UE capability is indicated for one or more of the following: physical downlink control channel (PDCCH), physical downlink shared channel (PDSCH) scheduled by the DCI, semi-persistent scheduling (SPS) transmission, periodic channel state information reference signal (CSI-RS), semi-persistent CSI-RS, aperiodic CSI-RS, positioning reference signal, periodic physical uplink control channel (PUCCH), semi-persistent PUCCH, aperiodic PUCCH, physical uplink shared channel (PUSCH), sounding reference signal (SRS), or physical random access channel (PRACH).

[0163] In Example 18, the method according to any one of Examples 1-17 further includes that the UE capability is associated with a sounding reference signal (SRS) as a source reference signal.

[0164] In Example 19, the method according to any one of Examples 1-18 further includes that the SRS is the source reference signal for downlink communication.

[0165] In Example 20, the method according to Examples 1-19 further includes that the joint DL and UL TCI state indicates a UE spatial reception filter associated with the SRS and based on the UE capability.

[0166] In Example 21, the method according to any one of Examples 1-20 further includes that the SRS is used for one or more of the following: beam management, codebook-based communication, non-codebook-based communication, or antenna switching.

[0167] In Example 22, the method according to any one of Examples 1-21 further includes that the joint DL and UL TCI state indicates the SRS as a quasi-co-location (QCL) type D reference signal.

[0168] In Example 23, the method according to Examples 1-22 further includes that the combined DL and UL TCI state further includes at least one additional reference signal for different QCL assumptions.

[0169] Example 24 is a device that includes one or more processors and one or more memories in electronic communication with the one or more processors, where the one or more memories store instructions executable by the one or more processors to cause the device to implement the method according to any one of Examples 1-23.

[0170] Example 25 is a system or apparatus that includes units for implementing a method or implementing the apparatus according to any one of Examples 1-23.

[0171] Example 26 is a non-transitory computer-readable medium storing instructions executable by one or more processors to cause the one or more processors to implement the method according to any one of Examples 1-23.

[0172] Example 27 is a method of wireless communication of a user equipment (UE), including: determining UE capabilities associated with an uplink (UL) transmission configuration indicator (TCI) state; and sending an indication of the UE capabilities associated with the UL TCI state to a base station.

[0173] In Example 28, the method according to Example 27 further includes that the UE capabilities are for a single transmission reception point (TRP) and include at least one of the following: a first maximum number of configured combined DL and UL TCI states for each bandwidth part (BWP) of each component carrier (CC), a second maximum number of active UL TCI states for each BWP of each CC, a third maximum number of configured UL TCI states across all CCs, or a fourth maximum number of active UL TCI states across all CCs.

[0174] In Example 29, the method according to Example 27 or Example 28 further includes that the UE capabilities are for data and control.

[0175] In Example 30, the method according to any one of Examples 27-29 further includes: receiving a configuration of a list of one or more CCs, where the UE reports the third maximum number of configured UL TCI states across all CCs in the list of one or more CCs, or the UE capabilities of the fourth maximum number of active UL TCI states across all CCs in the list of one or more CCs.

[0176] In Example 31, the method according to any one of Examples 27 - 30 further includes that the UE capability is for multiple transmission reception points (TRPs) based on multiple downlink control information (multi-DCI), and includes at least one of the following: the first maximum number of configured UL TCI states of each control resource set (CORESET) pool index for each bandwidth part (BWP) of each component carrier (CC), the second maximum number of active UL TCI states of each CORESET pool index for each BWP of each CC, the third maximum number of configured UL TCI states across all CORESET pool indexes for each BWP of each CC, the fourth maximum number of active UL TCI states across all CORESET pool indexes for each BWP of each CC, the fifth maximum number of configured UL TCI states of each CORESET pool index across all CCs, the sixth maximum number of active UL TCI states of each CORESET pool index across all CCs, the seventh maximum number of configured UL TCI states across all CCs across all CORESET pool indexes, the eighth maximum number of active UL TCI states across all CCs across all CORESET pool indexes, the first support for the default UL TCI state of each CORESET pool index for each BWP of each CC, or the second support for the default UL TCI state of each CORESET pool index across all CCs.

[0177] In Example 32, the method according to any one of Examples 27 - 31 further includes that the UE capability is for data and control.

[0178] In Example 33, the method according to any one of Examples 27 - 32 further includes: receiving a configuration of one or more CC lists, where the UE reports the UE capability of at least one of the following: the fifth maximum number of configured UL TCI states of each CORESET pool index across all CCs in the one or more CC lists, the sixth maximum number of active UL TCI states of each CORESET pool index across all CCs in the one or more CC lists, the seventh maximum number of configured UL TCI states across all CCs across all CORESET pool indexes in the one or more CC lists, the eighth maximum number of active UL TCI states across all CCs across all CORESET pool indexes in the one or more CC lists, or the second support for the default UL TCI state of each CORESET pool index across all CCs.

[0179] In Example 34, the method according to any one of Examples 27-33 further includes that the UE capability is for multiple transmission reception points (TRPs) based on a single downlink control information (DCI), and includes at least one of the following: a configured UL TCI state of the maximum number of TCI code points of a resource allocation scheme mapped to the multiple TRPs scheduled by the scheduled DCI, a first support for a default TCI code point of multiple UL TCI states mapped to each bandwidth part (BWP) of each component carrier (CC), or a second support for the default TCI code point of the multiple UL TCI states mapped to all CCs.

[0180] In Example 35, the method according to any one of Examples 27-34 further includes that the resource allocation scheme is based on frequency division multiplexing (FDM), space division multiplexing (SDM), or time division multiplexing (TDM).

[0181] In Example 36, the method according to any one of Examples 27-35 further includes: receiving a configuration of one or more CC lists, wherein the UE reports the UE capability of the second support for the default TCI code point of the multiple UL TCI states mapped to all CCs across the one or more CC lists.

[0182] In Example 37, the method according to any one of Examples 27-36 further includes that the UE capability is for activating the UL TCI state across multiple component carriers (CCs).

[0183] In Example 38, the method according to any one of Examples 27-37 further includes: receiving a configuration of one or more CC lists, wherein the UE reports the UE capability for activating the UL TCI state on the multiple CCs in the one or more CC lists.

[0184] In Example 39, the method according to any one of Examples 27-38 further includes that the UE capability includes layer 1 (L1) or layer 2 (L2) based inter-cell mobility based on the UL TCI state.

[0185] In Example 40, the method according to any one of Examples 27-39 further includes that the UE capability includes support for a reference signal or a channel of a non-serving cell for the UL TCI state.

[0186] In Example 41, the method according to any one of Examples 27-40 further includes that the reference signal or the channel of the non-serving cell provides one or more of a DL quasi co-location assumption or uplink spatial relation information for the UL TCI state.

[0187] In Example 42, the method according to any one of Examples 27 - 41 further includes that the UE capability is used to update the ULTCI state via at least one of a Media Access Control Control Element (MAC-CE) or Downlink Control Information (DCI).

[0188] In Example 43, the method according to any one of Examples 27 - 42 further includes indicating the UE capability for one or more of the following: Periodic Physical Uplink Control Channel (PUCCH), Semi-Persistent PUCCH, Aperiodic PUCCH, Physical Uplink Shared Channel (PUSCH), Sounding Reference Signal (SRS), or Physical Random Access Channel (PRACH).

[0189] Example 44 is an apparatus comprising one or more processors and one or more memories in electronic communication with the one or more processors, the one or more memories storing instructions executable by the one or more processors to cause the apparatus to implement the method according to any one of Examples 27 - 43.

[0190] Example 45 is a system or apparatus comprising units for implementing a method or an apparatus according to any one of Examples 27 - 43.

[0191] Example 46 is a non-transitory computer-readable medium storing instructions executable by one or more processors to cause the one or more processors to implement the method according to any one of Examples 27 - 43.

[0192] Example 47 is a method of wireless communication of a base station, comprising: receiving from a UE an indication of UE capability associated with a joint Downlink (DL) and Uplink (UL) Transmission Configuration Indicator (TCI) state, the joint DL and UL TCI state indicating a common beam for communication in DL and UL; and configuring or activating, based on the UE capability, one or more joint DL and UL TCI states for the UE.

[0193] In Example 48, the method according to Example 47 further includes that the UE capability is for a single Transmission Reception Point (TRP) and includes at least one of the following: a first maximum number of configured joint DL and UL TCI states for each Bandwidth Part (BWP) of each Component Carrier (CC), a second maximum number of activated joint DL and UL TCI states for each BWP of each CC, a third maximum number of configured joint DL and UL TCI states across all CCs, or a fourth maximum number of activated joint DL and UL TCI states across all CCs.

[0194] In Example 49, the method according to Example 47 or 48 further includes that the UE capability is for data and control.

[0195] In Example 50, the method according to any one of Examples 47 - 49 further includes: sending a configuration of one or more CC lists, where the third maximum number of configured combined DL and UL TCI states for all CCs in the one or more CC lists or the fourth maximum number of activated combined DL and UL TCI states for all CCs in the one or more CC lists, and receiving the UE capability.

[0196] In Example 51, the method according to any one of Examples 47 - 50 further includes that the UE capability is for multiple transmission reception points (TRPs) based on multiple downlink control information (multi-DCI), and includes at least one of the following: the first maximum number of configured combined DL and UL TCI states for each control resource set (CORESET) pool index of each bandwidth part (BWP) of each component carrier (CC), the second maximum number of activated combined DL and UL TCI states for each CORESET pool index of each BWP of each CC, the third maximum number of configured combined DL and UL TCI states across all CORESET pool indexes of each BWP of each CC, the fourth maximum number of activated combined DL and UL TCI states across all CORESET pool indexes of each BWP of each CC, the fifth maximum number of configured combined DL and UL TCI states for each CORESET pool index across all CCs, the sixth maximum number of activated combined DL and UL TCI states for each CORESET pool index across all CCs, the seventh maximum number of configured combined DL and UL TCI states across all CCs across all CORESET pool indexes, the eighth maximum number of activated combined DL and UL TCI states across all CCs across all CORESET pool indexes, the first support for the default DL and UL TCI states for each CORESET pool index of each BWP of each CC, or the second support for the default DL and UL TCI states for each CORESET pool index across all CCs.

[0197] In Example 52, the method according to any one of Examples 47 - 51 further includes that the UE capability is for data and control.

[0198] In Example 53, the method according to any one of Examples 47 - 52 further includes: sending a configuration of one or more CC lists, where the UE capabilities are received for at least one of the following: the fifth maximum number of configured combined DL and UL TCI states for each CORESET pool index across all CCs in the one or more CC lists, the sixth maximum number of activated combined DL and UL TCI states for each CORESET pool index across all CCs in the one or more CC lists, the seventh maximum number of configured combined DL and UL TCI states across all CORESET pool indices across all CCs in the one or more CC lists, the eighth maximum number of activated combined DL and UL TCI states across all CORESET pool indices across all CCs in the one or more CC lists, or the second support for the default DL and UL TCI states for each CORESET pool index across all CCs.

[0199] In Example 54, the method according to any one of Examples 47 - 53 further includes that the UE capabilities are for multiple transmission reception points (TRPs) based on a single downlink control information (DCI), and include at least one of the following: the maximum number of configured combined DL and UL TCI states of TCI code points of a resource allocation scheme mapped to the multiple TRPs scheduled by the scheduled DCI, the first support for the default TCI code points of multiple combined DL and UL TCI states mapped to each bandwidth part (BWP) of each component carrier (CC), or the second support for the default TCI code points of the multiple combined DL and UL TCI states mapped to all CCs.

[0200] In Example 55, the method according to any one of Examples 47 - 54, wherein the resource allocation scheme is based on frequency division multiplexing (FDM), space division multiplexing (SDM), or time division multiplexing (TDM).

[0201] In Example 56, the method according to Examples 47 - 55 further includes: sending a configuration of one or more CC lists, where the UE capabilities are received for the second support for the default TCI code points of the multiple combined DL and UL TCI states mapped to all CCs across the one or more CC lists.

[0202] In Example 57, the method according to any one of Examples 47 - 56 further includes that the UE capabilities are for activating the combined DL and UL TCI states across multiple component carriers (CCs).

[0203] In Example 58, the method according to any one of Examples 47 - 57 further includes: transmitting a configuration of one or more CC lists, wherein, for activation of the joint DL and ULTCI state on the plurality of CCs in the one or more CC lists, the UE capabilities are received.

[0204] In Example 59, the method according to any one of Examples 47 - 58 further includes that the UE capabilities include layer 1 (L1) or layer 2 (L2) based inter - cell mobility based on the joint DL and UL TCI state.

[0205] In Example 60, the method according to any one of Examples 47 - 59 further includes that the UE capabilities include support for reference signals or channels of non - serving cells for the joint DL and UL TCI state.

[0206] In Example 61, the method according to any one of Examples 47 - 60 further includes that the reference signal or the channel of the non - serving cell provides one or more of DL quasi - co - location assumptions or uplink spatial relation information for the joint DL and UL TCI state.

[0207] In Example 62, the method according to Examples 47 - 61 further includes that the UE capabilities are used to update the joint DL and UL TCI state via at least one of media access control control element (MAC - CE) or downlink control information (DCI).

[0208] In Example 63, the method according to any one of Examples 47 - 62 further includes indicating the UE capabilities for one or more of the following: physical downlink control channel (PDCCH), physical downlink shared channel (PDSCH) scheduled by the DCI, semi - persistent scheduling (SPS) transmission, periodic channel state information reference signal (CSI - RS), semi - persistent CSI - RS, aperiodic CSI - RS, positioning reference signal, periodic physical uplink control channel (PUCCH), semi - persistent PUCCH, aperiodic PUCCH, physical uplink shared channel (PUSCH), sounding reference signal (SRS), or physical random access channel (PRACH).

[0209] In Example 64, the method according to any one of Examples 47 - 63 further includes that the UE capabilities are associated with a sounding reference signal (SRS) as a source reference signal.

[0210] In Example 65, the method according to any one of Examples 47 - 65 further includes that the SRS is the source reference signal for downlink communication.

[0211] In Example 66, the method according to any one of Examples 47 - 65 further includes a UE spatial reception filter for which the combined DL and ULTCI state indication is associated with the SRS and is based on the UE capabilities.

[0212] In Example 67, the method according to any one of Examples 47 - 66 further includes that the SRS is used for one or more of the following: beam management, codebook - based communication, non - codebook - based communication, or antenna switching.

[0213] In Example 68, the method according to any one of Examples 47 - 67 further includes that the combined DL and ULTCI state indicates the SRS as a quasi - co - located (QCL) type D reference signal.

[0214] In Example 69, the method according to any one of Examples 47 - 68 further includes that the combined DL and ULTCI state further includes at least one additional reference signal for different QCL assumptions.

[0215] Example 70 is an apparatus that includes one or more processors and one or more memories in electronic communication with the one or more processors, the one or more memories storing instructions executable by the one or more processors to cause the apparatus to implement the method according to any one of Examples 47 - 69.

[0216] Example 71 is a system or apparatus that includes units for implementing a method or implementing the apparatus according to any one of Examples 47 - 69.

[0217] Example 72 is a non - transitory computer - readable medium storing instructions executable by one or more processors to cause the one or more processors to implement the method according to any one of Examples 47 - 69.

[0218] Example 73 is a method of wireless communication of a base station, including: receiving an indication of UE capabilities associated with an uplink (UL) transmission configuration indicator (TCI) state, the UL TCI state indicating a common beam for communication in DL and UL; and configuring or activating one or more UL TCI states for the UE based on the UE capabilities.

[0219] In Example 74, the method according to Example 73 further includes that the UE capability is for a single transmission reception point (TRP) and includes at least one of the following: a first maximum number of configured UL TCI states for each bandwidth part (BWP) of each component carrier (CC), a second maximum number of active UL TCI states for each BWP of each CC, a third maximum number of UL TCI states configured across all CCs, or a fourth maximum number of UL TCI states active across all CCs.

[0220] In Example 75, the method according to Example 73 or Example 74 further includes that the UE capability is for data and control.

[0221] In Example 76, the method according to any one of Examples 73 - 75 further includes: sending a configuration of one or more CC lists, wherein the third maximum number of configured UL TCI states for all CCs in the one or more CC lists or the fourth maximum number of active UL TCI states for all CCs in the one or more CC lists, and receiving the UE capability.

[0222] In Example 77, the method according to any one of Examples 73 - 76 further includes that the UE capability is for multiple transmission reception points (TRPs) based on multiple downlink control information (multi - DCI) and includes at least one of the following: a first maximum number of configured UL TCI states for each control resource set (CORESET) pool index of each bandwidth part (BWP) of each component carrier (CC), a second maximum number of active UL TCI states for each CORESET pool index of each BWP of each CC, a third maximum number of configured UL TCI states across all CORESET pool indexes of each BWP of each CC, a fourth maximum number of active UL TCI states across all CORESET pool indexes of each BWP of each CC, a fifth maximum number of configured UL TCI states for each CORESET pool index across all CCs, a sixth maximum number of active UL TCI states for each CORESET pool index across all CCs, a seventh maximum number of configured UL TCI states across all CCs across all CORESET pool indexes, an eighth maximum number of active UL TCI states across all CCs across all CORESET pool indexes, a first support for a default UL TCI state for each CORESET pool index of each BWP of each CC, or a second support for a default UL TCI state for each CORESET pool index across all CCs.

[0223] In Example 78, the method according to any one of Examples 73-77 further includes that the UE capabilities are for data and control.

[0224] In Example 79, the method according to any one of Examples 73-78 further includes: sending a configuration of one or more CC lists, where the UE capabilities are received for at least one of the following: the fifth maximum number of configured UL TCI states of each CORESET pool index across all CCs in the one or more CC lists, the sixth maximum number of active UL TCI states of each CORESET pool index across all CCs in the one or more CC lists, the seventh maximum number of configured UL TCI states across all CORESET pool indexes across all CCs in the one or more CC lists, the eighth maximum number of active UL TCI states across all CORESET pool indexes across all CCs in the one or more CC lists, or the second support for the default UL TCI state of each CORESET pool index across all CCs.

[0225] In Example 80, the method according to any one of Examples 73-79 further includes that the UE capabilities are for multiple transmission reception points (TRPs) based on a single downlink control information (DCI), and include at least one of the following: the maximum number of configured UL TCI states of TCI code points of a resource allocation scheme mapped to the multiple TRPs scheduled by the scheduled DCI, the first support for the default TCI code point of multiple UL TCI states mapped to each bandwidth part (BWP) of each component carrier (CC), or the second support for the default TCI code point of the multiple UL TCI states mapped to all CCs.

[0226] In Example 81, the method according to any one of Examples 73-80 further includes that the resource allocation scheme is based on frequency division multiplexing (FDM), spatial division multiplexing (SDM), or time division multiplexing (TDM).

[0227] In Example 82, the method according to any one of Examples 73-81 further includes: sending a configuration of one or more CC lists, where the UE capabilities are received for the second support for the default TCI code point of the multiple UL TCI states mapped to all CCs across the one or more CC lists.

[0228] In Example 83, the method according to any one of Examples 73-83 further includes that the UE capabilities are for activating the UL TCI states across multiple component carriers (CCs).

[0229] In Example 84, the method according to any one of Examples 73 - 83 further includes: sending a configuration of one or more CC lists, wherein, for activation of the UL TCI state on the plurality of CCs in the one or more CC lists, the UE capabilities are received.

[0230] In Example 85, the method according to any one of Examples 73 - 84 further includes, the UE capabilities include layer 1 (L1) or layer 2 (L2) based inter - cell mobility based on the UL TCI state.

[0231] In Example 86, the method according to any one of Examples 73 - 85 further includes, the UE capabilities include support for reference signals or channels of non - serving cells for the UL TCI state.

[0232] In Example 87, the method according to any one of Examples 73 - 86 further includes, the reference signal or the channel of the non - serving cell provides one or more of DL quasi - co - location assumptions or uplink spatial relation information for the UL TCI state.

[0233] In Example 88, the method according to any one of Examples 73 - 87 further includes, the UE capabilities are used to update the UL TCI state via at least one of media access control control element (MAC - CE) or downlink control information (DCI).

[0234] In Example 89, the method according to any one of Examples 73 - 88 further includes, indicating the UE capabilities for one or more of the following: periodic physical uplink control channel (PUCCH), semi - persistent PUCCH, aperiodic PUCCH, physical uplink shared channel (PUSCH), sounding reference signal (SRS), or physical random access channel (PRACH).

[0235] Example 90 is a device that includes one or more processors and one or more memories in electronic communication with the one or more processors, the one or more memories storing instructions executable by the one or more processors to cause the device to implement the method according to any one of Examples 73 - 89.

[0236] Example 91 is a system or apparatus that includes units for implementing a method or implementing the apparatus according to any one of Examples 73 - 89.

[0237] Example 92 is a non - transitory computer - readable medium storing instructions executable by one or more processors to cause the one or more processors to implement the method according to any one of Examples 73 - 89.

Claims

1. A method for wireless communication of a user equipment (UE), comprising: determining UE capabilities associated with a joint downlink (DL) and uplink (UL) transmission configuration indicator (TCI) state, the joint DL and UL TCI state indicating a common beam for communication in DL and UL; and sending an indication of the UE capabilities associated with the joint DL and UL TCI state to a base station.

2. The method according to claim 1, wherein, the UE capabilities are for a single transmission reception point (TRP) and include at least one of the following: a first maximum number of configured joint DL and UL TCI states for each bandwidth part (BWP) of each component carrier (CC), a second maximum number of activated joint DL and UL TCI states for each BWP of each CC, a third maximum number of configured joint DL and UL TCI states across all CCs, or a fourth maximum number of activated joint DL and UL TCI states across all CCs.

3. The method according to claim 2, wherein, the UE capabilities are for data and control.

4. The method according to claim 2, further comprising: receiving a configuration of a list of one or more CCs, wherein the UE reports the third maximum number of configured joint DL and UL TCI states across all CCs in the list of one or more CCs, or the UE capabilities of the fourth maximum number of activated joint DL and UL TCI states across all CCs in the list of one or more CCs.

5. The method according to claim 1, wherein, the UE capabilities are for multiple transmission reception points (TRPs) based on multiple downlink control information (multi-DCI) and include at least one of the following: a first maximum number of configured joint DL and UL TCI states for each control resource set (CORESET) pool index of each bandwidth part (BWP) of each component carrier (CC), a second maximum number of activated joint DL and UL TCI states for each CORESET pool index of each BWP of each CC, a third maximum number of configured joint DL and UL TCI states across all CORESET pool indexes for each BWP of each CC, a fourth maximum number of activated joint DL and UL TCI states across all CORESET pool indexes for each BWP of each CC, a fifth maximum number of configured joint DL and UL TCI states for each CORESET pool index across all CCs, a sixth maximum number of activated joint DL and UL TCI states for each CORESET pool index across all CCs, a seventh maximum number of configured joint DL and UL TCI states across all CCs across all CORESET pool indexes, an eighth maximum number of activated joint DL and UL TCI states across all CCs across all CORESET pool indexes, First support for the default DL and UL TCI states for each CORESET pool index of each BWP of each CC, or Second support for the default DL and UL TCI states for each CORESET pool index across all CCs.

6. The method according to claim 5, wherein, the UE capabilities are for data and control.

7. The method according to claim 5, further comprising: receiving a configuration of a list of one or more CCs, wherein the UE reports the UE capabilities for at least one of the following: the fifth maximum number of configured combined DL and UL TCI states for each CORESET pool index across all CCs in the one or more CC lists, the sixth maximum number of activated combined DL and UL TCI states for each CORESET pool index across all CCs in the one or more CC lists, the seventh maximum number of configured combined DL and UL TCI states across all CORESET pool indexes across all CCs in the one or more CC lists, the eighth maximum number of activated combined DL and UL TCI states across all CORESET pool indexes across all CCs in the one or more CC lists, or the second support for the default DL and UL TCI states for each CORESET pool index across all CCs.

8. The method according to claim 1, wherein, the UE capabilities are for multiple transmission reception points (TRPs) based on a single downlink control information (DCI), and include at least one of the following: the maximum number of configured combined DL and UL TCI states of TCI code points mapped to a resource allocation scheme for the multiple TRPs scheduled by the scheduled DCI, first support for the default TCI code points of multiple combined DL and UL TCI states mapped to each bandwidth part (BWP) of each component carrier (CC), or second support for the default TCI code points of the multiple combined DL and UL TCI states mapped across all CCs.

9. The method according to claim 8, wherein, the resource allocation scheme is based on frequency division multiplexing (FDM), space division multiplexing (SDM), or time division multiplexing (TDM).

10. The method according to claim 8, further comprising: receiving a configuration of a list of one or more CCs, wherein the UE reports the UE capabilities of the second support for the default TCI code points of the multiple combined DL and UL TCI states mapped across all CCs in the one or more CC lists.

11. The method according to claim 1, wherein, the UE capabilities are for activation of the combined DL and UL TCI states across multiple component carriers (CCs).

12. The method according to claim 11, further comprising: Receive a configuration of one or more CC lists, wherein the UE reports the UE capabilities for the activation of the joint DL and UL TCI states across the multiple CCs in the one or more CC lists.

13. The method according to claim 1, wherein, the UE capabilities include layer 1 (L1) or layer 2 (L2) based inter-cell mobility based on the joint DL and UL TCI states.

14. The method according to claim 13, wherein, the UE capabilities include support for reference signals or channels of the non-serving cell for the joint DL and UL TCI states.

15. The method according to claim 14, wherein, the reference signal or the channel of the non-serving cell provides one or more of DL quasi co-location assumptions or uplink spatial relationship information for the joint DL and UL TCI states.

16. The method according to claim 1, wherein, the UE capabilities are used to update the joint DL and UL TCI states via at least one of media access control control element (MAC-CE) or downlink control information (DCI).

17. The method according to claim 16, wherein, the UE capabilities are indicated for one or more of the following: Physical downlink control channel (PDCCH), Physical downlink shared channel (PDSCH) scheduled by the DCI, Semi-persistent scheduling (SPS) transmission, Periodic channel state information reference signal (CSI-RS), Semi-persistent CSI-RS, Aperiodic CSI-RS, Location reference signal, Periodic physical uplink control channel (PUCCH), Semi-persistent PUCCH, Aperiodic PUCCH, Physical uplink shared channel (PUSCH), Sounding reference signal (SRS), or Physical random access channel (PRACH).

18. The method according to claim 1, wherein, the UE capabilities are associated with a sounding reference signal (SRS) as a source reference signal.

19. The method according to claim 18, wherein, the SRS is the source reference signal for downlink communication.

20. The method according to claim 19, wherein, the joint DL and UL TCI states indicate a UE spatial reception filter associated with the SRS and based on the UE capabilities.

21. The method according to claim 18, wherein, the SRS is used for one or more of the following: Beam management, Codebook-based communication, Non-codebook-based communication, or Antenna switching.

22. The method according to claim 18, wherein, the joint DL and UL TCI states indicate the SRS as a quasi co-location (QCL) type D reference signal.

23. The method according to claim 22, wherein, the joint DL and UL TCI states further include at least one additional reference signal for different QCL assumptions.

24. An apparatus for wireless communication of a user equipment (UE), comprising: A unit for determining UE capabilities associated with a combined downlink (DL) and uplink (UL) transmission configuration indicator (TCI) state, where the combined DL and UL TCI state indicates a common beam for communication in DL and UL; and A unit for sending an indication of the UE capabilities associated with the combined DL and UL TCI state to a base station.

25. The apparatus according to claim 24, further comprising: A unit for performing the method according to any one of claims 2-23.

26. An apparatus for wireless communication at a user equipment (UE), comprising: A memory; and At least one processor coupled to the memory and configured to perform the method according to any one of claims 1-23.

27. A computer-readable medium storing computer-executable code for wireless communication at a user equipment (UE), which, when executed by a processor, causes the processor to perform the method according to any one of claims 1-23.

28. A method for wireless communication of a user equipment (UE), comprising: Determining UE capabilities associated with an uplink (UL) transmission configuration indicator (TCI) state; and Sending an indication of the UE capabilities associated with the UL TCI state to a base station.

29. The method according to claim 28, wherein, The UE capabilities are for a single transmission reception point (TRP) and include at least one of the following: A first maximum number of configured UL TCI states for each bandwidth part (BWP) of each component carrier (CC), A second maximum number of activated UL TCI states for each BWP of each CC, A third maximum number of configured UL TCI states across all CCs, or A fourth maximum number of activated UL TCI states across all CCs.

30. The method according to claim 29, wherein, The UE capabilities are for data and control.

31. The method according to claim 29, further comprising: Receiving a configuration of one or more CC lists, where the UE reports the third maximum number of configured UL TCI states across all CCs in the one or more CC lists, or the fourth maximum number of activated UL TCI states across all CCs in the one or more CC lists of the UE capabilities.

32. The method according to claim 28, wherein, The UE capabilities are for multiple transmission reception points (TRPs) based on multiple downlink control information (multi-DCI) and include at least one of the following: A first maximum number of configured UL TCI states for each control resource set (CORESET) pool index of each bandwidth part (BWP) of each component carrier (CC), A second maximum number of activated UL TCI states for each CORESET pool index of each BWP of each CC, The third maximum number of configured UL TCI states across all CORESET pool indices for each BWP of each CC, The fourth maximum number of active UL TCI states across all CORESET pool indices for each BWP of each CC, The fifth maximum number of configured UL TCI states across all CORESET pool indices for each CC, The sixth maximum number of active UL TCI states across all CORESET pool indices for each CC, The seventh maximum number of configured UL TCI states across all CORESET pool indices across all CCs, The eighth maximum number of active UL TCI states across all CORESET pool indices across all CCs, The first support for the default UL TCI state for each CORESET pool index of each BWP of each CC, or The second support for the default UL TCI state for each CORESET pool index across all CCs.

33. The method according to claim 32, wherein, the UE capabilities are for data and control.

34. The method according to claim 32, further comprising: receiving a configuration of a list of one or more CCs, wherein the UE reports the UE capabilities for at least one of the following: the fifth maximum number of configured UL TCI states across all CORESET pool indices across all CCs in the list of one or more CCs, the sixth maximum number of active UL TCI states across all CORESET pool indices across all CCs in the list of one or more CCs, the seventh maximum number of configured UL TCI states across all CORESET pool indices across all CCs across all CORESET pool indices in the list of one or more CCs, the eighth maximum number of active UL TCI states across all CORESET pool indices across all CCs across all CORESET pool indices in the list of one or more CCs, or the second support for the default UL TCI state for each CORESET pool index across all CCs.

35. The method according to claim 28, wherein, the UE capabilities are for multiple transmission reception points (TRPs) based on a single downlink control information (DCI), and include at least one of the following: the maximum number of configured UL TCI states of TCI code points of a resource allocation scheme mapped to the multiple TRPs scheduled by the scheduled DCI, the first support for the default TCI code point of multiple UL TCI states mapped to each bandwidth part (BWP) of each component carrier (CC), or the second support for the default TCI code point of the multiple UL TCI states mapped across all CCs.

36. The method according to claim 35, wherein, the resource allocation scheme is based on frequency division multiplexing (FDM), space division multiplexing (SDM), or time division multiplexing (TDM).

37. The method according to claim 35, further comprising: Receiving a configuration of one or more CC lists, wherein the UE reports the second supported UE capability of the default TCI code point for the multiple UL TCI states mapped to all CCs across the one or more CC lists.

38. The method according to claim 28, wherein, the UE capability is used for the activation of the UL TCI state across multiple component carriers (CCs).

39. The method according to claim 38, further comprising: Receiving a configuration of one or more CC lists, wherein the UE reports the UE capability for the activation of the UL TCI state across the multiple CCs in the one or more CC lists.

40. The method according to claim 28, wherein, the UE capability includes layer 1 (L1) or layer 2 (L2) based inter-cell mobility based on the UL TCI state.

41. The method according to claim 40, wherein, the UE capability includes support for reference signals or channels of the non-serving cell for the UL TCI state.

42. The method according to claim 41, wherein, the reference signal or the channel of the non-serving cell provides one or more of DL quasi co-location assumptions or uplink spatial relation information for the UL TCI state.

43. The method according to claim 28, wherein, the UE capability is used to update the UL TCI state via at least one of media access control control element (MAC-CE) or downlink control information (DCI).

44. The method according to claim 43, wherein, the UE capability is indicated for one or more of the following: periodic physical uplink control channel (PUCCH), semi-persistent PUCCH, aperiodic PUCCH, physical uplink shared channel (PUSCH), sounding reference signal (SRS), or physical random access channel (PRACH).

45. An apparatus for wireless communication of a user equipment (UE), comprising: a unit for determining UE capability associated with an uplink (UL) transmission configuration indicator (TCI) state; and a unit for sending an indication of the UE capability associated with the UL TCI state to a base station.

46. The apparatus according to claim 45, further comprising: a unit for performing the method according to any one of claims 29-44.

47. An apparatus for wireless communication of a user equipment (UE), comprising: a memory; and at least one processor coupled to the memory and configured to perform the method according to any one of claims 28-44.

48. A computer-readable medium storing computer-executable code for wireless communication at a user equipment (UE), which when executed by a processor causes the processor to perform the method according to any one of claims 28-44.

49. A method for wireless communication of a base station, comprising: Receive an indication of UE capabilities associated with a joint downlink (DL) and uplink (UL) transmission configuration indicator (TCI) state, where the joint DL and UL TCI state indicates a common beam for communication in DL and UL; and Based on the UE capabilities, configure or activate one or more joint DL and UL TCI states for the UE.

50. The method according to claim 49, wherein, the UE capabilities are for a single transmission reception point (TRP) and include at least one of the following: a first maximum number of configured joint DL and UL TCI states for each bandwidth part (BWP) of each component carrier (CC), a second maximum number of activated joint DL and UL TCI states for each BWP of each CC, a third maximum number of configured joint DL and UL TCI states across all CCs, or a fourth maximum number of activated joint DL and UL TCI states across all CCs.

51. The method according to claim 50, wherein, the UE capabilities are for data and control.

52. The method according to claim 50, further comprises: transmit a configuration of one or more CC lists, wherein the UE capabilities are received for the third maximum number of configured joint DL and UL TCI states across all CCs in the one or more CC lists or the fourth maximum number of activated joint DL and UL TCI states across all CCs in the one or more CC lists.

53. The method according to claim 49, wherein, the UE capabilities are for multiple transmission reception points (TRPs) based on multiple downlink control information (multi-DCI) and include at least one of the following: a first maximum number of configured joint DL and UL TCI states for each control resource set (CORESET) pool index of each bandwidth part (BWP) of each component carrier (CC), a second maximum number of activated joint DL and UL TCI states for each CORESET pool index of each BWP of each CC, a third maximum number of configured joint DL and UL TCI states across all CORESET pool indexes for each BWP of each CC, a fourth maximum number of activated joint DL and UL TCI states across all CORESET pool indexes for each BWP of each CC, a fifth maximum number of configured joint DL and UL TCI states for each CORESET pool index across all CCs, a sixth maximum number of activated joint DL and UL TCI states for each CORESET pool index across all CCs, a seventh maximum number of configured joint DL and UL TCI states across all CCs across all CORESET pool indexes, an eighth maximum number of activated joint DL and UL TCI states across all CCs across all CORESET pool indexes, First support for the default DL and UL TCI states for each CORESET pool index of each BWP of each CC, or Second support for the default DL and UL TCI states for each CORESET pool index across all CCs.

54. The method according to claim 53, wherein, the UE capabilities are for data and control.

55. The method according to claim 53, further comprising: sending a configuration of one or more CC lists, wherein the UE capabilities are received for at least one of: the fifth maximum number of configured combined DL and UL TCI states for each CORESET pool index across all CCs in the one or more CC lists, the sixth maximum number of activated combined DL and UL TCI states for each CORESET pool index across all CCs in the one or more CC lists, the seventh maximum number of configured combined DL and UL TCI states across all CORESET pool indexes across all CCs in the one or more CC lists, the eighth maximum number of activated combined DL and UL TCI states across all CORESET pool indexes across all CCs in the one or more CC lists, or the second support for the default DL and UL TCI states for each CORESET pool index across all CCs.

56. The method according to claim 49, wherein, the UE capabilities are for multiple transmission reception points (TRPs) based on a single downlink control information (DCI), and include at least one of: the maximum number of configured combined DL and UL TCI states of TCI code points mapped to a resource allocation scheme for the multiple TRPs scheduled by the scheduled DCI, first support for the default TCI code points of multiple combined DL and UL TCI states mapped to each bandwidth part (BWP) of each component carrier (CC), or second support for the default TCI code points of the multiple combined DL and UL TCI states mapped across all CCs.

57. The method according to claim 56, wherein, the resource allocation scheme is based on frequency division multiplexing (FDM), space division multiplexing (SDM), or time division multiplexing (TDM).

58. The method according to claim 56, further comprising: sending a configuration of one or more CC lists, wherein the UE capabilities are received for the second support for the default TCI code points of the multiple combined DL and UL TCI states mapped across all CCs in the one or more CC lists.

59. The method according to claim 49, wherein, the UE capabilities are for activation of the combined DL and UL TCI states across multiple component carriers (CCs).

60. The method according to claim 59, further comprising: Configure to send one or more CC lists, and receive the UE capabilities for activating the joint DL and UL TCI states for the multiple CCs across the one or more CC lists.

61. The method according to claim 49, wherein, the UE capabilities include layer 1 (L1) or layer 2 (L2) based inter-cell mobility based on the joint DL and UL TCI states.

62. The method according to claim 61, wherein, the UE capabilities include support for reference signals or channels of non-serving cells for the joint DL and UL TCI states.

63. The method according to claim 62, wherein, the reference signals or the channels of the non-serving cells provide one or more of DL quasi co-location assumptions or uplink spatial relation information for the joint DL and UL TCI states.

64. The method according to claim 49, wherein, the UE capabilities are used to update the joint DL and UL TCI states via at least one of media access control control element (MAC-CE) or downlink control information (DCI).

65. The method according to claim 64, wherein, the UE capabilities are indicated for one or more of the following: Physical downlink control channel (PDCCH), Physical downlink shared channel (PDSCH) scheduled by the DCI, Semi-persistent scheduling (SPS) transmission, Periodic channel state information reference signal (CSI-RS), Semi-persistent CSI-RS, Aperiodic CSI-RS, Location reference signal, Periodic physical uplink control channel (PUCCH), Semi-persistent PUCCH, Aperiodic PUCCH, Physical uplink shared channel (PUSCH), Sounding reference signal (SRS), or Physical random access channel (PRACH).

66. The method according to claim 49, wherein, the UE capabilities are associated with a sounding reference signal (SRS) as a source reference signal.

67. The method according to claim 66, wherein, the SRS is the source reference signal for downlink communication.

68. The method according to claim 67, wherein, the joint DL and UL TCI states indicate a UE spatial reception filter associated with the SRS and based on the UE capabilities.

69. The method according to claim 66, wherein, the SRS is used for one or more of the following: Beam management, Codebook-based communication, Non-codebook-based communication, or Antenna switching.

70. The method according to claim 66, wherein, the joint DL and UL TCI states indicate the SRS as a quasi co-location (QCL) type D reference signal.

71. The method according to claim 70, wherein, the joint DL and UL TCI states further include at least one additional reference signal for different QCL assumptions.

72. An apparatus for wireless communication of a base station, comprising: A unit for receiving from a UE an indication of UE capabilities associated with a joint downlink (DL) and uplink (UL) transmission configuration indicator (TCI) state, where the joint DL and UL TCI state indicates a common beam for communication in DL and UL; and A unit for configuring or activating, based on the UE capabilities, one or more joint DL and UL TCI states for the UE.

73. The apparatus according to claim 72, further comprising: A unit for performing the method according to any one of claims 50 - 73.

74. An apparatus for wireless communication of a base station, comprising: A memory; and At least one processor coupled to the memory and configured to perform the method according to any one of claims 49 - 73.

75. A computer-readable medium storing computer-executable code for wireless communication at a base station, which when executed by a processor causes the processor to perform the method according to any one of claims 49 - 73.

76. A method for wireless communication of a base station, comprising: Receiving from a UE an indication of UE capabilities associated with an uplink (UL) transmission configuration indicator (TCI) state, where the UL TCI state indicates a common beam for communication in DL and UL; and Configuring or activating, based on the UE capabilities, one or more UL TCI states for the UE.

77. The method according to claim 76, wherein, The UE capabilities are for a single transmission reception point (TRP) and include at least one of the following: A first maximum number of configured UL TCI states for each bandwidth part (BWP) of each component carrier (CC), A second maximum number of activated UL TCI states for each BWP of each CC, A third maximum number of configured UL TCI states across all CCs, or A fourth maximum number of activated UL TCI states across all CCs.

78. The method according to claim 77, wherein, The UE capabilities are for data and control.

79. The method according to claim 77, further comprising: Sending a configuration of one or more CC lists, where the UE capabilities are received for the third maximum number of configured UL TCI states across all CCs in the one or more CC lists or the fourth maximum number of activated UL TCI states across all CCs in the one or more CC lists.

80. The method according to claim 76, wherein, The UE capabilities are for multiple transmission reception points (TRPs) based on multiple downlink control information (multi-DCI) and include at least one of the following: A first maximum number of configured UL TCI states for each control resource set (CORESET) pool index of each bandwidth part (BWP) of each component carrier (CC), The second maximum number of activated UL TCI states for each CORESET pool index of each BWP of each CC, The third maximum number of configured UL TCI states across all CORESET pool indexes of each BWP of each CC, The fourth maximum number of activated UL TCI states across all CORESET pool indexes of each BWP of each CC, The fifth maximum number of configured UL TCI states across all CORESET pool indexes of each CC, The sixth maximum number of activated UL TCI states across all CORESET pool indexes of each CC, The seventh maximum number of configured UL TCI states across all CCs across all CORESET pool indexes, The eighth maximum number of activated UL TCI states across all CCs across all CORESET pool indexes, The first support for the default UL TCI state for each CORESET pool index of each BWP of each CC, or The second support for the default UL TCI state for each CORESET pool index across all CCs.

81. The method according to claim 80, wherein, the UE capabilities are for data and control.

82. The method according to claim 80, further comprising: sending a configuration of one or more CC lists, wherein the UE capabilities are received for at least one of the following: the fifth maximum number of configured UL TCI states across all CORESET pool indexes of all CCs in the one or more CC lists, the sixth maximum number of activated UL TCI states across all CORESET pool indexes of all CCs in the one or more CC lists, the seventh maximum number of configured UL TCI states across all CCs across all CORESET pool indexes in the one or more CC lists, the eighth maximum number of activated UL TCI states across all CCs across all CORESET pool indexes in the one or more CC lists, or the second support for the default UL TCI state for each CORESET pool index across all CCs.

83. The method according to claim 76, wherein, the UE capabilities are for multiple transmission reception points (TRPs) based on a single downlink control information (DCI), and include at least one of the following: the maximum number of configured UL TCI states of TCI code points of a resource allocation scheme mapped to the multiple TRPs scheduled by the scheduled DCI, the first support for the default TCI code point of multiple UL TCI states mapped to each bandwidth part (BWP) of each component carrier (CC), or the second support for the default TCI code point of the multiple UL TCI states mapped across all CCs.

84. The method according to claim 83, wherein, The resource allocation scheme is based on frequency division multiplexing (FDM), space division multiplexing (SDM), or time division multiplexing (TDM).

85. The method according to claim 83, further comprises: sending a configuration of one or more CC lists, wherein the UE capability is received for the second support of the default TCI code point for the plurality of UL TCI states mapped to all CCs across the one or more CC lists.

86. The method according to claim 76, wherein the UE capability is for activation of the UL TCI state across multiple component carriers (CCs).

87. The method according to claim 86, further comprises: sending a configuration of one or more CC lists, wherein the UE capability is received for activation of the UL TCI state across the plurality of CCs in the one or more CC lists.

88. The method according to claim 76, wherein the UE capability includes layer 1 (L1) or layer 2 (L2) based inter-cell mobility based on the UL TCI state.

89. The method according to claim 88, wherein the UE capability includes support for reference signals or channels of the non-serving cell for the UL TCI state.

90. The method according to claim 89, wherein the reference signal or the channel of the non-serving cell provides one or more of DL quasi co-location assumptions or uplink spatial relation information for the UL TCI state.

91. The method according to claim 76, wherein the UE capability is for updating the UL TCI state via at least one of media access control control element (MAC-CE) or downlink control information (DCI).

92. The method according to claim 91, wherein the UE capability is indicated for one or more of the following: periodic physical uplink control channel (PUCCH), semi-persistent PUCCH, aperiodic PUCCH, physical uplink shared channel (PUSCH), sounding reference signal (SRS), or physical random access channel (PRACH).

93. An apparatus for wireless communication at a base station, comprises: a unit for receiving an indication of UE capability associated with an uplink (UL) transmission configuration indicator (TCI) state, the UL TCI state indicating a common beam for communication in DL and UL; and a unit for configuring or activating one or more UL TCI states for the UE based on the UE capability.

94. The apparatus according to claim 93, further comprises: a unit for performing the method according to any one of claims 77-92.

95. An apparatus for wireless communication at a base station, comprises: a memory; and at least one processor coupled to the memory and configured to perform the method according to any one of claims 76-92.

96. A computer-readable medium storing computer-executable code for wireless communication at a base station, which, when executed by a processor, causes the processor to perform the method according to any one of claims 76-92.

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