Patent Publication Number: US-2021195624-A1

Title: Signaling for uplink beam activation

Description:
CROSS REFERENCE TO RELATED APPLICATION(S) 
     This application claims the benefit of U.S. Provisional Application Ser. No. 62/953,173, entitled “Signalling for Uplink Beam Activation” and filed on Dec. 23, 2019, which is expressly incorporated by reference herein in its entirety. This application also claims the benefit of U.S. Provisional Application Ser. No. 62/966,928, entitled “Signalling for Uplink Beam Activation” and filed on Jan. 28, 2020, which is expressly incorporated by reference herein in its entirety. 
    
    
     BACKGROUND 
     Technical Field 
     The present disclosure relates generally to communication systems, and more particularly, to a configuration for signaling for uplink beam activation. 
     INTRODUCTION 
     Wireless communication systems are widely deployed to provide various telecommunication services such as telephony, video, data, messaging, and broadcasts. Typical wireless communication systems may employ multiple-access technologies capable of supporting 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. 
     These multiple access technologies have been adopted in various telecommunication standards to provide a common protocol that enables different wireless devices to communicate on a municipal, national, regional, and even global level. An example telecommunication standard is 5G New Radio (NR). 5G NR is part of a continuous mobile broadband evolution promulgated by 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 communications (mMTC), and ultra-reliable low latency communications (URLLC). Some aspects of 5G NR may be based on the 4G Long Term Evolution (LTE) standard. There exists a need for further improvements in 5G NR technology. These improvements may also be applicable to other multi-access technologies and the telecommunication standards that employ these technologies. 
     SUMMARY 
     The following presents a simplified summary of one or more aspects in order to provide a basic understanding of such aspects. This summary is not an extensive overview of all contemplated aspects, and is intended to neither identify key or critical elements of all aspects nor delineate the scope of any or all aspects. Its sole purpose is to present some concepts of one or more aspects in a simplified form as a prelude to the more detailed description that is presented later. 
     In an aspect of the disclosure, a method, a computer-readable medium, and an apparatus are provided. The apparatus may be a device at a UE. The device may be a processor and/or a modem at a UE or the UE itself. The apparatus receives a configuration of uplink (UL) transmission configuration indicator (TCI) (UL-TCI) states and an activation of a subset of configured UL-TCI states. The apparatus receives downlink control information (DCI) in a physical downlink control channel (PDCCH) scheduling an UL transmission with one or more TCI states of activated TCI states. The apparatus transmits the UL transmission based on the one or more TCI states. 
     In an aspect of the disclosure, a method, a computer-readable medium, and an apparatus are provided. The apparatus may be a device at a base station. The device may be a processor and/or a modem at a base station or the base station itself. The apparatus transmits, to a user equipment (UE), a configuration of uplink (UL) transmission configuration indicator (TCI) (UL-TCI) states and an activation of a subset of configured UL-TCI states. The apparatus transmits, to the UE, downlink control information (DCI) in a physical downlink control channel (PDCCH) scheduling an UL transmission with one or more TCI states of activated TCI states, the DCI scheduling an UL transmission. The apparatus receives the UL transmission from the UE, the UL transmission being based on the one or more TCI states. The apparatus demodulates the UL transmission based on the one or more TCI states. 
     To the accomplishment of the foregoing and related ends, the one or more aspects comprise the features hereinafter fully described and particularly pointed out in the claims. The following description and the annexed drawings set forth in detail certain illustrative features of the one or more aspects. These features are indicative, however, of but a few of the various ways in which the principles of various aspects may be employed, and this description is intended to include all such aspects and their equivalents. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a diagram illustrating an example of a wireless communications system and an access network. 
         FIG. 2A  is a diagram illustrating an example of a first frame, in accordance with various aspects of the present disclosure. 
         FIG. 2B  is a diagram illustrating an example of DL channels within a subframe, in accordance with various aspects of the present disclosure. 
         FIG. 2C  is a diagram illustrating an example of a second frame, in accordance with various aspects of the present disclosure. 
         FIG. 2D  is a diagram illustrating an example of UL channels within a subframe, in accordance with various aspects of the present disclosure. 
         FIG. 3  is a diagram illustrating an example of a base station and user equipment (UE) in an access network. 
         FIG. 4  is call flow diagram illustrating signaling for UL beam activation for a UE. 
         FIG. 5  is a diagram illustrating an example TCI states configuration for activation/deactivation of UL-TCI states. 
         FIG. 6  is a flowchart of a method of wireless communication. 
         FIG. 7  is a diagram illustrating an example of a hardware implementation for an example apparatus. 
         FIG. 8  is a flowchart of a method of wireless communication. 
         FIG. 9  is a diagram illustrating an example of a hardware implementation for an example apparatus. 
     
    
    
     DETAILED DESCRIPTION 
     The detailed description set forth below in connection with the appended drawings is intended as a description of various configurations and is not intended to represent the only configurations in which the concepts described herein may be practiced. The detailed description includes specific details for the purpose of providing a thorough understanding of various concepts. However, it will be apparent to those skilled in the art that these concepts may be practiced without these specific details. In some instances, well known structures and components are shown in block diagram form in order to avoid obscuring such concepts. 
     Several aspects of telecommunication systems will now be presented with reference to various apparatus and methods. These apparatus and methods will be described in the following detailed description and illustrated in the accompanying drawings by various blocks, components, circuits, processes, algorithms, etc. (collectively referred to as “elements”). These elements may 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. 
     By way of example, an element, or any portion of an element, or any combination of elements may be implemented as a “processing system” that includes one or more processors. Examples of processors include microprocessors, microcontrollers, graphics processing units (GPUs), central processing units (CPUs), application processors, digital signal processors (DSPs), reduced instruction set computing (RISC) processors, systems on a chip (SoC), baseband processors, field programmable gate arrays (FPGAs), programmable logic devices (PLDs), state machines, gated logic, discrete hardware circuits, and other suitable hardware configured to perform the various functionality described throughout this disclosure. One or more processors in the processing system may execute software. Software shall 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, executables, threads of execution, procedures, functions, etc., whether referred to as software, firmware, middleware, microcode, hardware description language, or otherwise. 
     Accordingly, in one or more example embodiments, the functions described may be implemented in hardware, software, or any combination thereof. If implemented in software, the functions may be stored on or encoded as one or more instructions or code on a computer-readable medium. Computer-readable media includes computer storage media. Storage media may be any available media that can be accessed by a computer. By way of example, and not limitation, such computer-readable media can comprise a random-access memory (RAM), a read-only memory (ROM), an electrically erasable programmable ROM (EEPROM), optical disk storage, magnetic disk storage, other magnetic storage devices, combinations of the aforementioned 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 that can be accessed by a computer. 
       FIG. 1  is a diagram illustrating an example of a wireless communications system and an access network  100 . The wireless communications system (also referred to as a wireless wide area network (WWAN)) includes base stations  102 , UEs  104 , an Evolved Packet Core (EPC)  160 , and another core network  190  (e.g., a 5G Core (5GC)). The base stations  102  may include macrocells (high power cellular base station) and/or small cells (low power cellular base station). The macrocells include base stations. The small cells include femtocells, picocells, and microcells. 
     The base stations  102  configured for 4G LTE (collectively referred to as Evolved Universal Mobile Telecommunications System (UMTS) Terrestrial Radio Access Network (E-UTRAN)) may interface with the EPC  160  through first backhaul links  132  (e.g., S1 interface). The base stations  102  configured for 5G NR (collectively referred to as Next Generation RAN (NG-RAN)) may interface with core network  190  through second backhaul links  184 . In addition to other functions, the base stations  102  may perform one or more of the following functions: transfer of user data, radio channel ciphering and deciphering, integrity protection, header compression, mobility control functions (e.g., handover, dual connectivity), inter-cell interference coordination, connection setup and release, load balancing, distribution for non-access stratum (NAS) messages, NAS node selection, synchronization, radio access network (RAN) sharing, multimedia broadcast multicast service (MBMS), subscriber and equipment trace, RAN information management (RIM), paging, positioning, and delivery of warning messages. The base stations  102  may communicate directly or indirectly (e.g., through the EPC  160  or core network  190 ) with each other over third backhaul links  134  (e.g., X2 interface). The first backhaul links  132 , the second backhaul links  184 , and the third backhaul links  134  may be wired or wireless. 
     The base stations  102  may wirelessly communicate with the UEs  104 . Each of the base stations  102  may provide communication coverage for a respective geographic coverage area  110 . There may be overlapping geographic coverage areas  110 . For example, the small cell  102 ′ may have a coverage area  110 ′ that overlaps the coverage area  110  of one or more macro base stations  102 . A network that includes both small cell and macrocells may be known as a heterogeneous network. A heterogeneous network may also include Home Evolved Node Bs (eNBs) (HeNBs), which may provide service to a restricted group known as a closed subscriber group (CSG). The communication links  120  between the base stations  102  and the UEs  104  may include uplink (UL) (also referred to as reverse link) transmissions from a UE  104  to a base station  102  and/or downlink (DL) (also referred to as forward link) transmissions from a base station  102  to a UE  104 . The communication links  120  may use multiple-input and multiple-output (MIMO) antenna technology, including spatial multiplexing, beamforming, and/or transmit diversity. The communication links may be through one or more carriers. The base stations  102 /UEs  104  may use spectrum up to Y MHz (e.g., 5, 10, 15, 20, 100, 400, etc. MHz) bandwidth per carrier allocated in a carrier aggregation of up to a total of Yx MHz (x component carriers) used for transmission in each direction. The carriers may or may not be adjacent to each other. Allocation of carriers may be asymmetric with respect to DL and UL (e.g., more or fewer carriers may be allocated for DL than for UL). The component carriers may include a primary component carrier and one or more secondary component carriers. A primary component carrier may be referred to as a primary cell (PCell) and a secondary component carrier may be referred to as a secondary cell (SCell). 
     Certain UEs  104  may communicate with each other using device-to-device (D2D) communication link  158 . The D2D communication link  158  may use the DL/UL WWAN spectrum. The D2D communication link  158  may use one or more sidelink channels, such as a physical sidelink broadcast channel (PSBCH), a physical sidelink discovery channel (PSDCH), a physical sidelink shared channel (PSSCH), and a physical sidelink control channel (PSCCH). D2D communication may be through a variety of wireless D2D communications systems, such as for example, WiMedia, Bluetooth, ZigBee, Wi-Fi based on the Institute of Electrical and Electronics Engineers (IEEE) 802.11 standard, LTE, or NR. 
     The wireless communications system may further include a Wi-Fi access point (AP)  150  in communication with Wi-Fi stations (STAs)  152  via communication links  154 , e.g., in a 5 GHz unlicensed frequency spectrum or the like. When communicating in an unlicensed frequency spectrum, the STAs  152 /AP  150  may perform a clear channel assessment (CCA) prior to communicating in order to determine whether the channel is available. 
     The small cell  102 ′ may operate in a licensed and/or an unlicensed frequency spectrum. When operating in an unlicensed frequency spectrum, the small cell  102 ′ may employ NR and use the same unlicensed frequency spectrum (e.g., 5 GHz, or the like) as used by the Wi-Fi AP  150 . The small cell  102 ′, employing NR in an unlicensed frequency spectrum, may boost coverage to and/or increase capacity of the access network. 
     The electromagnetic spectrum is often subdivided, based on frequency/wavelength, into various classes, bands, channels, etc. In 5G NR, two initial operating bands have been identified as frequency range designations FR1 (410 MHz-7.125 GHz) and FR2 (24.25 GHz-52.6 GHz). The frequencies between FR1 and FR2 are often referred to as mid-band frequencies. Although a portion of FR1 is greater than 6 GHz, FR1 is often referred to (interchangeably) as a “sub-6 GHz” band in various documents and articles. A similar nomenclature issue sometimes occurs with regard to FR2, which is often referred to (interchangeably) as a “millimeter wave” band in documents and articles, despite being different from the extremely high frequency (EHF) band (30 GHz-300 GHz) which is identified by the International Telecommunications Union (ITU) as a “millimeter wave” band. 
     With the above aspects in mind, unless specifically stated otherwise, it should be understood that the term “sub-6 GHz” or the like if used herein may broadly represent frequencies that may be less than 6 GHz, may be within FR1, or may include mid-band frequencies. Further, unless specifically stated otherwise, it should be understood that the term “millimeter wave” or the like if used herein may broadly represent frequencies that may include mid-band frequencies, may be within FR2, or may be within the EHF band. 
     A base station  102 , whether a small cell  102 ′ or a large cell (e.g., macro base station), may include and/or be referred to as an eNB, gNodeB (gNB), or another type of base station. Some base stations, such as gNB  180  may operate in a traditional sub 6 GHz spectrum, in millimeter wave frequencies, and/or near millimeter wave frequencies in communication with the UE  104 . When the gNB  180  operates in millimeter wave or near millimeter wave frequencies, the gNB  180  may be referred to as a millimeter wave base station. The millimeter wave base station  180  may utilize beamforming  182  with the UE  104  to compensate for the path loss and short range. The base station  180  and the UE  104  may each include a plurality of antennas, such as antenna elements, antenna panels, and/or antenna arrays to facilitate the beamforming. 
     The base station  180  may transmit a beamformed signal to the UE  104  in one or more transmit directions  182 ′. The UE  104  may receive the beamformed signal from the base station  180  in one or more receive directions  182 ″. The UE  104  may also transmit a beamformed signal to the base station  180  in one or more transmit directions. The base station  180  may receive the beamformed signal from the UE  104  in one or more receive directions. The base station  180 /UE  104  may perform beam training to determine the best receive and transmit directions for each of the base station  180 /UE  104 . The transmit and receive directions for the base station  180  may or may not be the same. The transmit and receive directions for the UE  104  may or may not be the same. 
     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 be in communication with a Home Subscriber Server (HSS)  174 . The MME  162  is the control node that processes the signaling between the UEs  104  and the EPC  160 . Generally, the MME  162  provides bearer and connection management. All user Internet protocol (IP) packets are transferred through the Serving Gateway  166 , which itself is connected to the PDN Gateway  172 . The PDN Gateway  172  provides UE IP address allocation as well as other functions. The PDN Gateway  172  and the BM-SC  170  are connected to the IP Services  176 . The IP Services  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 transmission, may be used to authorize and initiate MBMS Bearer Services within a public land mobile network (PLMN), and may be used to schedule MBMS transmissions. The MBMS Gateway  168  may be used to distribute MBMS traffic to the base stations  102  belonging to a Multicast Broadcast Single Frequency Network (MBSFN) area broadcasting a particular service, and may be responsible for session management (start/stop) and for collecting eMBMS related charging information. 
     The core network  190  may include a 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 be in communication with a Unified Data Management (UDM)  196 . The AMF  192  is the control node that processes the signaling between the UEs  104  and the core network  190 . Generally, the AMF  192  provides QoS flow and session management. All user Internet protocol (IP) packets are transferred through the UPF  195 . The UPF  195  provides UE IP address allocation as well as other functions. The UPF  195  is connected to the IP Services  197 . The IP Services  197  may include the Internet, an intranet, an IP Multimedia Subsystem (IMS), a Packet Switch (PS) Streaming (PSS) Service, and/or other IP services. 
     The base station may include and/or be referred to as a gNB, Node B, eNB, an access point, a base transceiver station, a radio base station, a radio transceiver, a transceiver function, a basic service set (BSS), an extended service set (ESS), a transmit reception point (TRP), or some other suitable terminology. The base station  102  provides an access point to the EPC  160  or core network  190  for a UE  104 . Examples of UEs  104  include a cellular phone, a smart phone, a session initiation protocol (SIP) phone, a laptop, a personal digital assistant (PDA), a satellite radio, a global positioning system, a multimedia device, a video device, a digital audio player (e.g., MP3 player), a camera, a game console, a tablet, a smart device, a wearable device, a vehicle, an electric meter, a gas pump, a large or small kitchen appliance, a healthcare device, an implant, a sensor/actuator, a display, or any other similar functioning device. Some of the UEs  104  may be referred to as IoT devices (e.g., parking meter, gas pump, toaster, vehicles, heart monitor, etc.). The UE  104  may also be referred to as a station, a mobile station, a subscriber station, a mobile unit, a subscriber unit, a wireless unit, a remote unit, a mobile device, a wireless device, a wireless communications device, a remote device, a mobile subscriber station, an access terminal, a mobile terminal, a wireless terminal, a remote terminal, a handset, a user agent, a mobile client, a client, or some other suitable terminology. 
     Referring again to  FIG. 1 , in certain aspects, the UE  104  may be configured to activate a subset of configured UL-TCI states. For example, the UE  104  may include a signaling component  198  that includes an UL beam activation component  199 . The UE  104  receives a configuration of UL-TCI states and an activation of a subset of configured UL-TCI states. The UE  104  receives DCI in a PDCCH scheduling an UL transmission with one or more TCI states of activated TCI states. The UE  104  transmits the UL transmission based on the one or more TCI states. 
     Referring again to  FIG. 1 , in certain aspects, the base station  180  may be configured to configure the UE  104  to activate a subset of configured UL-TCI states. For example, the base station  180  may include a signaling component  198  that includes a UL beam activation component  199 . The base station  180  transmits, to the UE  104 , a configuration of UL-TCI states and an activation of a subset of configured UL-TCI states. The base station  180  transmits, to the UE  104 , DCI in a PDCCH scheduling an UL transmission with one or more TCI states of activated TCI states, the DCI scheduling an UL transmission. The base station  180  receives the UL transmission from the UE  104 , the UL transmission being based on the one or more TCI states. The base station  180  demodulates the UL transmission based on the one or more TCI states. 
     Although the following description may be focused on 5G NR, the concepts described herein may be applicable to other similar areas, such as LTE, LTE-A, CDMA, GSM, and other wireless technologies. 
       FIG. 2A  is a diagram  200  illustrating an example of a first subframe within a 5G NR frame structure.  FIG. 2B  is a diagram  230  illustrating an example of DL channels within a 5G NR subframe.  FIG. 2C  is a diagram  250  illustrating an example of a second subframe within a 5G NR frame structure.  FIG. 2D  is a diagram  280  illustrating an example of UL channels within a 5G NR subframe. The 5G NR frame structure may be frequency division duplexed (FDD) in which for a particular set of subcarriers (carrier system bandwidth), subframes within the set of subcarriers are dedicated for either DL or UL, or may be time division duplexed (TDD) in which for a particular set of subcarriers (carrier system bandwidth), subframes within the set of subcarriers are dedicated for both DL and UL. In the examples provided by  FIGS. 2A, 2C , the 5G NR frame structure is assumed to be TDD, with subframe 4 being configured with slot format 28 (with mostly DL), where D is DL, U is UL, and F is flexible for use between DL/UL, and subframe 3 being configured with slot format 1 (with all UL). While subframes 3, 4 are shown with slot formats 1, 28, respectively, any particular subframe may be configured with any of the various available slot formats 0-61. Slot formats 0, 1 are all DL, UL, respectively. Other slot formats 2-61 include a mix of DL, UL, and flexible symbols. UEs are configured with the slot format (dynamically through DCI, or semi-statically/statically through radio resource control (RRC) signaling) through a received slot format indicator (SFI). Note that the description infra applies also to a 5G NR frame structure that is TDD. 
     Other wireless communication technologies may have a different frame structure and/or different channels. A frame (10 ms) may be divided into 10 equally sized subframes (1 ms). Each subframe may include one or more time slots. Subframes may also include mini-slots, which may include 7, 4, or 2 symbols. Each slot may include 7 or 14 symbols, depending on the slot configuration. For slot configuration 0, each slot may include 14 symbols, and for slot configuration 1, each slot may include 7 symbols. The symbols on DL may be cyclic prefix (CP) orthogonal frequency division multiplexing (OFDM) (CP-OFDM) symbols. The symbols on UL may be CP-OFDM symbols (for high throughput scenarios) or discrete Fourier transform (DFT) spread OFDM (DFT-s-OFDM) symbols (also referred to as single carrier frequency-division multiple access (SC-FDMA) symbols) (for power limited scenarios; limited to a single stream transmission). The number of slots within a subframe is based on the slot configuration and the numerology. For slot configuration 0, different numerologies μ 0 to 4 allow for 1, 2, 4, 8, and 16 slots, respectively, per subframe. For slot configuration 1, different numerologies 0 to 2 allow for 2, 4, and 8 slots, respectively, per subframe. Accordingly, for slot configuration 0 and numerology μ, there are 14 symbols/slot and 2 μ  slots/subframe. The subcarrier spacing and symbol length/duration are a function of the numerology. The subcarrier spacing may be equal to 2 μ *15 kHz, where μ is the numerology 0 to 4. As such, the numerology μ=0 has a subcarrier spacing of 15 kHz and the numerology μ=4 has a subcarrier spacing of 240 kHz. The symbol length/duration is inversely related to the subcarrier spacing.  FIGS. 2A-2D  provide an example of slot configuration 0 with 14 symbols per slot and numerology μ=2 with 4 slots per subframe. The 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) (see  FIG. 2B ) that are frequency division multiplexed. Each BWP may have a particular numerology. 
     A resource grid may be used to represent the frame structure. Each time slot includes a resource block (RB) (also referred to as physical RBs (PRBs)) that extends  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. 
     As illustrated in  FIG. 2A , some of the REs carry reference (pilot) signals (RS) for the UE. The RS may include demodulation RS (DM-RS) (indicated as R for one particular configuration, but other DM-RS configurations are possible) and channel state information reference signals (CSI-RS) for channel estimation at the UE. The RS may also include beam measurement RS (BRS), beam refinement RS (BRRS), and phase tracking RS (PT-RS). 
       FIG. 2B  illustrates an example of various DL channels within a subframe of a frame. The PDCCH carries DCI within one or more control channel elements (CCEs) (e.g., 1, 2, 4, 8, or 16 CCEs), each CCE including six RE groups (REGs), each REG including 12 consecutive REs in an OFDM symbol of an RB. A PDCCH within one BWP may be referred to as a control resource set (CORESET). A UE is configured to monitor PDCCH candidates in a PDCCH search space (e.g., common search space, UE-specific search space) during PDCCH monitoring occasions on the CORESET, where the PDCCH candidates have different DCI formats and different aggregation levels. Additional BWPs may be located at greater and/or lower frequencies across the channel bandwidth. A primary synchronization signal (PSS) may be within symbol 2 of particular subframes of a frame. The PSS is used by a UE  104  to determine subframe/symbol timing and a physical layer identity. A secondary synchronization signal (SSS) may be within symbol 4 of particular subframes of a frame. The SSS is used by a UE to determine a 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 a physical cell identifier (PCI). Based on the PCI, the UE can determine the locations of the aforementioned DM-RS. The physical broadcast channel (PBCH), which carries a master information block (MIB), may be logically grouped with the PSS and SSS to form a synchronization signal (SS)/PBCH block (also referred to as SS block (SSB)). The MIB provides a number of RBs in the system bandwidth and a system frame number (SFN). The physical downlink shared channel (PDSCH) carries user data, broadcast system information not transmitted through the PBCH such as system information blocks (SIBs), and paging messages. 
     As illustrated in  FIG. 2C , some of the REs carry DM-RS (indicated as R for one particular configuration, but other DM-RS configurations are possible) for channel estimation at the base station. The UE may transmit DM-RS for the physical uplink control channel (PUCCH) and DM-RS for the physical uplink shared channel (PUSCH). The PUSCH DM-RS may be transmitted in the first one or two symbols of the PUSCH. The PUCCH DM-RS may be transmitted in different configurations depending on whether short or long PUCCHs are transmitted and depending on the particular PUCCH format used. The UE may transmit sounding reference signals (SRS). The SRS may be transmitted in the last symbol of a subframe. The SRS may have a comb structure, and a UE may transmit SRS on one of the combs. The SRS may be used by a base station for channel quality estimation to enable frequency-dependent scheduling on the UL. 
       FIG. 2D  illustrates an example of various UL channels within a subframe of a frame. The PUCCH may be located as indicated in one configuration. The PUCCH carries uplink control information (UCI), such as scheduling requests, a channel quality indicator (CQI), a precoding matrix indicator (PMI), a rank indicator (RI), and hybrid automatic repeat request (HARD) acknowledgment (ACK) (HARQ-ACK) information (ACK/negative ACK (NACK)) feedback. The PUSCH carries data, and may additionally be used to carry a buffer status report (BSR), a power headroom report (PHR), and/or UCI. 
       FIG. 3  is a block diagram of a base station  310  in communication with a UE  350  in an access network. In the DL, IP packets from the EPC  160  may be provided to a controller/processor  375 . The controller/processor  375  implements layer  3  and layer  2  functionality. Layer  3  includes a radio resource control (RRC) layer, and layer  2  includes a service data adaptation protocol (SDAP) layer, a packet data convergence protocol (PDCP) layer, a radio link control (RLC) layer, and a medium access control (MAC) layer. The controller/processor  375  provides RRC layer functionality associated with broadcasting of system information (e.g., MIB, RRC connection control (e.g., RRC connection paging, RRC connection establishment, RRC connection modification, and RRC connection release), inter radio access technology (RAT) mobility, and measurement configuration for UE measurement reporting; PDCP layer functionality associated with header compression/decompression, security (ciphering, deciphering, integrity protection, integrity verification), and handover support functions; RLC layer functionality associated with the transfer of upper layer packet data units (PDUs), error correction through ARQ, concatenation, segmentation, and reassembly of RLC service data units (SDUs), re-segmentation of RLC data PDUs, and reordering of RLC data PDUs; and MAC layer functionality associated with 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 through HARQ, priority handling, and logical channel prioritization. 
     The transmit (TX) processor  316  and the receive (RX) processor  370  implement layer  1  functionality associated with various signal processing functions. Layer  1 , which includes a physical (PHY) layer, may include error detection on the transport channels, forward error correction (FEC) coding/decoding of the transport channels, interleaving, rate matching, mapping onto physical channels, modulation/demodulation of physical channels, and MIMO antenna processing. The TX processor  316  handles mapping to signal constellations based on various modulation schemes (e.g., binary phase-shift keying (BPSK), quadrature phase-shift keying (QPSK), M-phase-shift keying (M-PSK), M-quadrature amplitude modulation (M-QAM)). The coded and modulated symbols may then be split into parallel streams. Each stream may then be mapped to an OFDM subcarrier, multiplexed with a reference signal (e.g., pilot) in the time and/or frequency domain, and then combined together using an Inverse Fast Fourier Transform (IFFT) to produce a physical channel carrying a time domain OFDM symbol stream. The OFDM stream is spatially precoded to produce multiple spatial streams. Channel estimates from a channel estimator  374  may be used to determine the coding and modulation scheme, as well as for spatial processing. The channel estimate may be derived from a reference signal and/or channel condition feedback transmitted by the UE  350 . Each spatial stream may then be provided to a different antenna  320  via a separate transmitter  318  TX. Each transmitter  318  TX may modulate an RF carrier with a respective spatial stream for transmission. 
     At the UE  350 , each receiver  354  RX receives a signal through its respective antenna  352 . Each receiver  354  RX recovers information modulated onto an RF carrier and provides the information to the receive (RX) processor  356 . The TX processor  368  and the RX processor  356  implement layer  1  functionality 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 , they may be combined by the RX processor  356  into a single OFDM symbol stream. The RX processor  356  then converts the OFDM symbol stream from the time-domain to the frequency domain using a Fast Fourier Transform (FFT). The frequency domain signal comprises a separate OFDM symbol stream for each subcarrier of the OFDM signal. The symbols on each subcarrier, and the reference signal, 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 . The soft decisions are then decoded and deinterleaved to recover the data and control signals that were originally transmitted by the base station  310  on the physical channel. The data and control signals are then provided to the controller/processor  359 , which implements layer  3  and layer  2  functionality. 
     The controller/processor  359  can be associated with a memory  360  that stores program codes and data. The memory  360  may be referred to as a computer-readable medium. In the UL, the controller/processor  359  provides demultiplexing between transport and logical channels, packet reassembly, deciphering, 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 an ACK and/or NACK protocol to support HARQ operations. 
     Similar to the functionality described in connection with the DL transmission by the base station  310 , the controller/processor  359  provides RRC layer functionality associated with system information (e.g., MIB, SIBs) acquisition, RRC connections, and measurement reporting; PDCP layer functionality associated with header compression/decompression, and security (ciphering, deciphering, integrity protection, integrity verification); RLC layer functionality associated with the transfer of upper layer PDUs, error correction through ARQ, concatenation, segmentation, and reassembly of RLC SDUs, re-segmentation of RLC data PDUs, and reordering of RLC data PDUs; and MAC layer functionality associated with mapping between logical channels and transport channels, multiplexing of MAC SDUs onto TBs, demultiplexing of MAC SDUs from TBs, scheduling information reporting, error correction through HARQ, priority handling, and logical channel prioritization. 
     Channel estimates derived by a channel estimator  358  from a reference signal or feedback transmitted by the base station  310  may be used by the TX processor  368  to select the appropriate coding and modulation schemes, and to facilitate spatial processing. The spatial streams generated by the TX processor  368  may be provided to different antenna  352  via separate transmitters  354 TX. Each transmitter  354 TX may modulate an RF carrier with a respective spatial stream for transmission. 
     The UL transmission is processed at the base station  310  in a manner similar to that described in connection with the receiver function at the UE  350 . Each receiver  318 RX receives a signal through its respective antenna  320 . Each receiver  318 RX recovers information modulated onto an RF carrier and provides the information to a RX processor  370 . 
     The controller/processor  375  can be associated with a memory  376  that stores program codes 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 and logical channels, packet reassembly, deciphering, header decompression, control signal processing to recover IP packets from the UE  350 . 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 an ACK and/or NACK protocol to support HARQ operations. 
     At least one of the TX processor  368 , the RX processor  356 , and the controller/processor  359  may be configured to perform aspects in connection with  198  of  FIG. 1 . 
     At least one of the TX processor  316 , the RX processor  370 , and the controller/processor  375  may be configured to perform aspects in connection with  198  of  FIG. 1 . 
     A unified TCI framework for UL and DL is desirable for supporting multi-TRP in NR 5G. TCI framework may specify beams to be used for communication. In wireless communication systems (e.g., NR 5G), directional transmission is desired and for effective channel propagation a signal may be utilized for decoding a channel on which transmission occurs. For UL, spatial relation information through RRC may specify a beam on which transmission is occurring but may not specify quasi-co located (QCL) properties. Also, in absence of UL-TCI, signaling mechanism to a UE may be limited to spatial relation information through RRC. 
     A UL-TCI may be used to indicate or enable which UL states to use for a UL transmission and the UL-TCI may be used to specify QCL relations for uplink transmissions. Two antenna ports may have a QCL relationship if properties of the channel over which a symbol on one antenna port is conveyed can be inferred from the channel over which a symbol on the other antenna port is conveyed. A set of two QCL antenna ports may have a common set of QCL relations (referred to as the same spatial filter), such as one or more of Doppler shift, Doppler spread, average delay, delay spread, or a spatial Rx parameter. One or more of the UEs/BS may utilize the QCL relations of a pair of beams to infer information from one beam to another. For DL TCI, the UE may be configured with up to 64 candidate TCI states, for example, where a first subset may be associated with a control resource set (CORESET) of the PDCCH and a second subset may be associated with the PDSCH. When a default beam for SRS/PUCCH is not configured, the UE may determine a spatial relation (default beam) for transmitting the SRS/PUCCH based on TCI state information. At least for the UE that supports beam correspondence, if spatial relation information is not configured for a dedicated SRS/PUCCH transmission, the UE may determine a default spatial relation for the dedicated SRS/PUCCH transmission. 
     A DL TCI activation framework may be based on DCI/MAC-CE. For a unified UL-DL framework, such a mechanism may be extended for UL-TCI states as well, where each UL-TCI contains a source RS to indicate an UL transmit (Tx) beam for a target UL RS/channel. The source RS can be an SRS, a Synchronization Signal Block (SSB), CSI-RS, etc. The target UL RS/channel can be PUCCH, SRS, physical random access channel (PRACH), or PUSCH. The below table represents an example of UL-TCI states. 
     
       
         
           
               
               
               
               
             
               
                   
               
               
                 Valid  
                   
                   
                   
               
               
                 UL-TCI 
                   
                   
                   
               
               
                 state 
                 Source (reference)  
                 (target)  
                   
               
               
                 Configuration 
                 RS 
                 UL RS 
                 [qcl-Type] 
               
               
                   
               
             
            
               
                 1 
                 SRS resource (for  
                 DM-RS for 
                 Spatial-relation 
               
               
                   
                 BM) + [panel ID] 
                 PUCCH 
                   
               
               
                   
                   
                 or SRS or 
                   
               
               
                   
                   
                 PRACH 
                   
               
               
                 2 
                 DL RS(a CSI-RS  
                 DM-RS for 
                 Spatial-relation 
               
               
                   
                 resource or a SSB) +  
                 PUCCH 
                   
               
               
                   
                 [panel ID] 
                 or SRS or 
                   
               
               
                   
                   
                 PRACH 
                   
               
               
                 3 
                 DL RS(a CSI-RS  
                 DM-RS for 
                 Spatial-relation +  
               
               
                   
                 resource or a SSB) +  
                 PUSCH 
                 [port(s)-indication] 
               
               
                   
                 [panel ID] 
                   
                   
               
               
                 4 
                 DL RS(a CSI-RS  
                 DM-RS for 
                 Spatial-relation +  
               
               
                   
                 resource or a SSB) 
                 PUSCH 
                 [port(s)-indication] 
               
               
                   
                 and SRS resource +  
                   
                   
               
               
                   
                 [panel ID] 
                   
                   
               
               
                 5 
                 SRS resource +  
                 DM-RS for 
                 Spatial-relation +  
               
               
                   
                 [panel ID] 
                 PUSCH 
                 [port(s)-indication] 
               
               
                 6 
                 UL RS(a SRS for  
                 DM-RS for 
                 Spatial-relation +  
               
               
                   
                 BM) and SRS  
                 PUSCH 
                 [port(s)-indication] 
               
               
                   
                 resource + [panel ID] 
               
               
                   
               
            
           
         
       
     
       FIG. 4  is a call flow diagram  400  of signaling between a UE  402  and a base station  404 . The base station  404  may be configured to provide at least one cell. The UE  402  may be configured to communicate with the base station  404 . For example, in the context of  FIG. 1 , the base station  404  may correspond to base station  102 / 180  and, accordingly, the cell may include a geographic coverage area  110  in which communication coverage is provided and/or small cell  102 ′ having a coverage area  110 ′. Further, a UE  402  may correspond to at least UE  104 . In another example, in the context of  FIG. 3 , the base station  404  may correspond to base station  310  and the UE  402  may correspond to UE  350 . 
     As illustrated in  FIG. 4 , a UE  402  receives, from a base station  404  an RRC signal  405  that configures one or more UL-TCI states. The UE  402  also receives, from the base station  404 , a medium access control (MAC) control element (CE) (MAC-CE) with an activation configuration  406  that activates a subset of the configured UL-TCI states (i.e., the UL-TCI states configured by the RRC signal  405 ). For example, the UE  402  may receive an activation configuration  406  (for example, the activation configuration  500  as described below with reference to  FIG. 5 ). The activation configuration  406  may include a TCI state identifier(s) of an UL-TCI state(s) to be activated for an UL transmission. For example, the UL-TCI state(s) may be initially deactivated and upon receiving the activation configuration the UE  402  may activate the specified UL-TCI state(s). 
     In addition, the UE  402  receives, from the base station  404 , DCI  408  in a PDCCH scheduling an UL transmission. The DCI  408  may schedule an UL transmission with one or more TCI states of the activated TCI states. The DCI  408  schedules a transmission of at least one of SRS, a PUCCH, a PUSCH, or a PRACH. For example, the DCI  408  may schedule a transmission of an SRS based on the one or more TCI states of the activated TCI states. The DCI  408  may include one or more codepoint values indicating the one or more TCI states of the activated TCI states. The codepoint values may represent a bitmap to indicate one or more activated TCI states. For example, the DCI  408  may be resource constrained in terms of the number of bits that can be included in the DCI  408 . Therefore, instead of including a bit sequence to specify the one or more TCI states, the DCI  408  may include a coded sequence (e.g., a codepoint value to specify the one or more TCI states as described below with reference to  FIG. 5 ). The codepoint value may be within the set of one or more codepoint values indicating the one or more TCI states. In one configuration, the codepoint value may be specified using three bits (for example to indicate one of codepoint 0, codepoint 1, . . . codepoint 7 as described below with reference to  FIG. 5 ). In one configuration, the UE  402  may have a mapping between the one or more activated TCI states and a set of codepoint values. In another configuration, the UE  402  may separately receive the mapping between the one or more activated TCI states and a set of codepoint values from the base station  404 . 
     The UE  402  may transmit, to the base station  404 , the at least one of the SRS, the PUCCH, the PUSCH, or the PRACH  410  based on the one or more TCI states of the subset of activated TCI states. For example, the UE  402  may transmit at least one of the SRS, the PUCCH, the PUSCH, or the PRACH  410  (i.e., a UL transmission  410 ) based on one or more of the TCI states of the activated TCI states indicated by the DCI  408 . Further, the UE  402  may transmit the UL transmission  410  transmission with a same QCL property as that of a reference signal associated with each of the TCI states for the UL transmission  410 . For example, the QCL property may include one or more port indications, a Doppler shift, a Doppler spread, an average delay, a delay spread, a spatial Tx parameter, or a spatial receive (Rx) parameter. In one configuration, the reference signal may be one of SRS, or a DL reference signal (RS). Further, the reference signal may be associated with a panel identifier (ID) of the UE  402  or a panel ID of the base station  404 . For example, a panel ID may refer to an identifier for an antenna element(s) or port definition(s). In one configuration, the DL RS may be one of channel state information (CSI) RS (CSI-RS) or demodulation RS (DM-RS) for at least one of a PDSCH or a PDCCH, or a synchronization signal/physical broadcast channel (PBCH) (SS/PBCH) block. On receiving the UL transmission  410 , at  412 , the BS  404  may demodulate the received UL transmission based on the one or more TCI states of the subset of activated TCI states. 
       FIG. 5  is a diagram illustrating an example TCI states activation configuration  500  for activation/deactivation of UL-TCI states. For example, the TCI states activation configuration  500  may be similar to the activation configuration  406  received through the MAC-CE (as described above with reference to  FIG. 4 ). The TCI states activation configuration  500  may include Oct 1, Oct 2, Oct 3, . . . , Oct N blocks. The Oct blocks may include one or more bits that correspond to TCI states to be activated (as described above with reference to  FIG. 4 ) for a PDSCH of a serving cell for UE-specific PDSCH MAC-CE. For example, Oct 1 may define the format (bit locations and length of sub-blocks) of the blocks. Oct 2, Oct 3, . . . Oct N may include a serving cell ID (e.g., with a length of 5 bits), a Bandwidth Part ID (BWP ID) (e.g., with a length of 2 bits), and a reserve bit (R). Oct 2 may include bits T 0 -T 7  and Oct 3 may include bits T 8 -T 15 . Similarly, Oct N may include bits T (N-2)×8  T (N-2)×8+7 . The list (a subset) of TCI states activated/deactivated in the TCI state activation configuration  500  may be configured by the bitmap represented by bits T 0 -T (N-2)×8 . For example, if a bit in a specific location is set to be ‘1’, it means that it activates a TCI state mapped to the position of the bit. For example, if the bit is set to be ‘0’, it means that it deactivates a TCI state mapped to the position of the bit. For example, if T4=1, it activates the index  4 . The list of bit position that are set to be ‘1’ is assigned to a small table called codepoint and the max size of the codepoint may be 8. It means that up to 8 bit fields in a MAC-CE can be set to be ‘1’. The position of ‘1’ bits are assigned to codepoint in an increasing order. For example, if the fields T4, T10, T11, T19, T25, T40, T45 and T50 are set to be ‘1’ and all other bits are set to be ‘0’, then the codepoint may set to be as follows: 
     codepoint 0=4 
     codepoint 1=10 
     codepoint 2=11 
     codepoint 3=19 
     codepoint 4=25 
     codepoint 5=40 
     codepoint 6=45 
     codepoint 7=50 
     In one configuration, TCI states in a DCI may be indicated using a codepoint value. 
     For example, the DCI  408  (as described above with reference to  FIG. 4 ) may include a codepoint value (e.g., 0 for codepoint 0, 1 for codepoint 1, etc.) to indicate TCI states for the UL transmission  410 . As described above in  FIG. 4 , the DCI  408  may include 3 bits to specify the codepoint value (codepoint 0, codepoint 1 . . . codepoint 7). 
     Activated UL-TCI states may be sequentially mapped to the UL-TCI codepoint in a scheduling DCI (e.g., the DCI  408  as described above with reference to  FIG. 4 ). Each of the UL-TCI states (T 0 -T (N-2)×8 ) may contain a source RS to indicate UL Tx beam for a target UL RS/channel. The unified TCI framework allows enhancement on multi-beam operation, for targeting FR2 (Frequency Range 24.25 GHz-52.6 GHz), and may also be used for FR1 (Frequency Range &lt;7.225 GHz). 
       FIG. 6  is a flowchart  600  of a method of wireless communication. The method may be performed by a UE or a component of a UE (e.g., the UE  104 ; the apparatus  702 ; the cellular baseband processor  704 , which may include the memory  360  and which may be the entire UE  350  or a component of the UE  350 , such as the TX processor  368 , the RX processor  356 , and/or the controller/processor  359 ). One or more of the illustrated operations may be omitted, transposed, or contemporaneous. Optional aspects are illustrated with a dashed line. The method may allow a UE to activate a subset of configured UL-TCI states. 
     At  602 , the UE receives a configuration of UL-TCI states. For example,  602  may be performed by configuration component  740  of apparatus  702 . In some aspects, the UE may receive the configuration of UL-TCI states in an RS. The UE may also receive an activation configuration activating a subset of configured UL-TCI states. In some aspects, the UE receives the activation configuration through a MAC-CE. For example, referring to  FIGS. 4, 5 , the UE  402  may receive the activation configuration  406 ,  500  activating a subset of configured UL-TCI states through a MAC-CE from the base station  404 . 
     At  604 , the UE receives DCI in a PDCCH scheduling an UL transmission with one or more TCI states of the activated TCI states. For example,  604  may be performed by schedule component  742  of apparatus  702 . The DCI schedules a transmission of at least one of SRS, a PUCCH, a PUSCH, or a PRACH. For example, referring to  FIGS. 4 and 5 , the UE  402  may receive the DCI  408  with one or more TCI states of the activated TCI states for scheduling the UL transmission  410 . For example, as described above in  FIG. 4 , the UL transmission  410  may be at least one of SRS, a PUCCH, a PUSCH, or a PRACH. In some aspects, the DCI includes one or more codepoint values indicating the one or more TCI states of the activated TCI states. For example, as described above with reference to  FIGS. 4 and 5 , the DCI  408  may include a codepoint value to indicate the one or more TCI states of the activated TCI states. 
     In some aspects, for example at  606 , the UE receives a mapping between activated TCI states and a set of codepoint values. For example,  606  may be performed by map component  744  of apparatus  702 . The one or more codepoint values may be within the set of codepoint values. 
     At  608 , the UE transmits the UL transmission based on the one or more TCI states. For example,  608  may be performed by uplink component  746  of apparatus  702 . For example, as described above with reference to  FIGS. 4 and 5 , the UE  402  may transmit the UL transmission  410  based on the one or more TCI states indicated by the DCI  408 . In some aspects, the UL transmission is at least one of SRS, a PUCCH, a PUSCH, or a PRACH. In some aspects, the UE may transmit the UL transmission with a QCL property that is the same or similar as a reference signal associated with the one TCI state. For example, as described above with reference to  FIGS. 4 and 5 , the UE  402  may transmit the UL transmission  410  with the same QCL property as that of a reference signal associated with each of the TCI states (i.e., the one or more TCI states for the UL transmission  410  indicated by the DCI  408 ). In some aspects, the reference signal is associated with a panel identifier (ID) of the UE. In some aspects, the QCL property includes at least one of a one or more port indications, a Doppler shift, a Doppler spread, an average delay, a delay spread, a spatial Tx parameter, or a spatial Rx parameter. In some aspects, the reference signal is one of SRS, or a DL RS. In some aspects, the DL RS is one of CSI-RS, DM-RS for at least one of a PDSCH or PDCCH, or a SS/PBCH block. 
       FIG. 7  is a diagram  700  illustrating an example of a hardware implementation for an apparatus  702 . The apparatus  702  is a UE and includes a cellular baseband processor  704  (also referred to as a modem) coupled to a cellular RF transceiver  722  and one or more subscriber identity modules (SIM) cards  720 , an application processor  706  coupled to a secure digital (SD) card  708  and a screen  710 , a Bluetooth module  712 , a wireless local area network (WLAN) module  714 , a Global Positioning System (GPS) module  716 , and a power supply  718 . The cellular baseband processor  704  communicates through the cellular RF transceiver  722  with the UE  104  and/or BS  102 / 180 . The cellular baseband processor  704  may include a computer-readable medium/memory. The computer-readable medium/memory may be non-transitory. The cellular baseband processor  704  is responsible for general processing, including the execution of software stored on the computer-readable medium/memory. The software, when executed by the cellular baseband processor  704 , causes the cellular baseband processor  704  to perform the various functions described supra. The computer-readable medium/memory may also be used for storing data that is manipulated by the cellular baseband processor  704  when executing software. The cellular baseband processor  704  further includes a reception component  730 , a communication manager  732 , and a transmission component  734 . The communication manager  732  includes the one or more illustrated components. The components within the communication manager  732  may be stored in the computer-readable medium/memory and/or configured as hardware within the cellular baseband processor  704 . The cellular baseband processor  704  may be a component of the UE  350  and may include the memory  360  and/or at least one of the TX processor  368 , the RX processor  356 , and the controller/processor  359 . In one configuration, the apparatus  702  may be a modem chip and include just the cellular baseband processor  704 , and in another configuration, the apparatus  702  may be the entire UE (e.g., see  350  of  FIG. 3 ) and include the aforediscussed additional modules of the apparatus  702 . 
     The communication manager  732  includes a configuration component  740  that is configured to receive a configuration of UL-TCI states, e.g., as described in connection with  602  of  FIG. 6 . The communication manager  732  further includes a schedule component  742  that is configured to receive DCI in a PDCCH scheduling an UL transmission with one or more TCI states of the activated TCI states, e.g., as described in connection with  604  of  FIG. 6 . The communication manager  732  further includes a map component  744  that is configured to receive a mapping between activated TCI states and a set of codepoint values, e.g., as described in connection with  606  of  FIG. 6 . The communication manager  732  further includes an uplink component  746  that is configured to transmit the UL transmission based on the one or more TCI states, e.g., as described in connection with  608  of  FIG. 6   
     The apparatus may include additional components that perform each of the blocks of the algorithm in the aforementioned flowchart of  FIG. 6 . As such, each block in the aforementioned flowchart of  FIG. 6  may be performed by a component and the apparatus may include one or more of those components. The components may be one or more hardware components specifically configured to carry out the stated processes/algorithm, implemented by a processor configured to perform the stated processes/algorithm, stored within a computer-readable medium for implementation by a processor, or some combination thereof. 
     In one configuration, the apparatus  702 , and in particular the cellular baseband processor  704 , includes means for receiving a configuration of UL-TCI states and an activation of a subset of configured UL-TCI states. The apparatus includes means for receiving DCI in a PDCCH scheduling an UL transmission with one or more TCI states of activated TCI states. The apparatus includes means for transmitting the UL transmission based on the one or more TCI states. The apparatus further includes means for receiving a mapping between activated TCI states and a set of codepoint values, the one or more codepoint values being within the set of codepoint values. The aforementioned means may be one or more of the aforementioned components of the apparatus  702  configured to perform the functions recited by the aforementioned means. As described supra, the apparatus  702  may include the TX Processor  368 , the RX Processor  356 , and the controller/processor  359 . As such, in one configuration, the aforementioned means may be the TX Processor  368 , the RX Processor  356 , and the controller/processor  359  configured to perform the functions recited by the aforementioned means. 
       FIG. 8  is a flowchart  800  of a method of wireless communication. The method may be performed by a base station or a component of a base station (e.g., the base station  102 / 180 ; the apparatus  902 ; the baseband unit  904 , which may include the memory  376  and which may be the entire base station  310  or a component of the base station  310 , such as the TX processor  316 , the RX processor  370 , and/or the controller/processor  375 ). One or more of the illustrated operations may be omitted, transposed, or contemporaneous. Optional aspects are illustrated with a dashed line. The method may allow a base station to configure a UE to activate a subset of configured UL-TCI states. 
     At  802 , the base station transmits to a UE, an activation configuration activating a subset of configured UL-TCI states. For example,  802  may be performed by configuration component  940  of apparatus  902 . For example, as described with reference to  FIGS. 4 and 5 , the BS  404  may transmit to the UE  402 , the activation configuration  406 / 500 . The BS may also transmit to the UE an activation of a subset of configured UL-TCI states. For example, with reference to  FIGS. 4 and 5 , the UE may transmit the activation configuration  406 ,  500  activating a subset of configured UL-TCI states through a MAC-CE, to the UE  402 . In some aspects, the configuration of UL-TCI states and the activation of the subset of configured UL-TCI states may be received through an RRC signal and a MAC-CE, respectively. 
     At  804 , the base station transmits, to the UE, DCI in a PDCCH scheduling an UL transmission with one or more TCI states of the activated TCI states. For example,  804  may be performed by schedule component  942  of apparatus  902 . The DCI may schedule an UL transmission. The DCI schedules a transmission of at least one of SRS, a PUCCH, a PUSCH, or a PRACH. For example, referring to  FIGS. 4 and 5 , the BS  404  may transmit the DCI  408  with one or more TCI states of the activated TCI states for scheduling the UL transmission  410  to the UE  402 . For example, as described above in  FIG. 4 , the UL transmission  410  may be at least one of SRS, a PUCCH, a PUSCH, or a PRACH. In some aspects, the DCI may include one or more codepoint values indicating the one or more TCI states of the activated TCI states. For example, as described above with reference to  FIGS. 4 and 5 , the DCI  408  may include a codepoint value to indicate the one or more TCI states of the activated TCI states. 
     In some aspects, for example at  806 , the base station transmits a mapping between activated TCI states and a set of codepoint values. For example,  806  may be performed by map component  944  of apparatus  902 . The one or more codepoint values may be within the set of codepoint values. 
     At  808 , the base station receives the UL transmission from the UE. For example,  808  may be performed by uplink component  946  of apparatus  902 . The UL transmission may be based on the one or more TCI states. For example, as described above with reference to  FIGS. 4 and 5 , the BS  404  may receive the UL transmission  410  based on the one or more TCI states indicated by the DCI  408 . In some aspects, the UL transmission may be at least one of SRS, a PUCCH, a PUSCH, or a PRACH. In some aspects, the UL transmission is associated with a QCL property that is the same or similar as a reference signal associated with one TCI state (e.g., the one or more TCI states for the UL transmission  410  indicated by the DCI  408 ). In some aspects, the reference signal may be associated with a panel ID of the UE. In some aspects, the QCL property includes at least one of a one or more port indications, a Doppler shift, a Doppler spread, an average delay, a delay spread, a spatial Tx parameter, or a spatial Rx parameter. In one configuration, the reference signal is one of SRS, or a DL RS. In some aspects, the DL RS is one of CSI-RS, DM-RS for at least one of a PDSCH or PDCCH, or a SS/PBCH block. 
     At  810 , the base station demodulates the UL transmission. For example,  810  may be performed by demodulation component  948  of apparatus  902 . The base station may demodulate the UL transmission based on the one or more TCI states. For example, as described with reference to  FIGS. 4 and 5 , the BS  404  at  412  may demodulate the UL transmission  410  received from the UE  402  based on the one or more TCI states of the subset of activated TCI states. 
       FIG. 9  is a diagram  900  illustrating an example of a hardware implementation for an apparatus  902 . The apparatus  902  is a BS and includes a baseband unit  904 . The baseband unit  904  may communicate through a cellular RF transceiver  922  with the UE  104 . The baseband unit  904  may include a computer-readable medium/memory. The baseband unit  904  is responsible for general processing, including the execution of software stored on the computer-readable medium/memory. The software, when executed by the baseband unit  904 , causes the baseband unit  904  to perform the various functions described supra. The computer-readable medium/memory may also be used for storing data that is manipulated by the baseband unit  904  when executing software. The baseband unit  904  further includes a reception component  930 , a communication manager  932 , and a transmission component  934 . The communication manager  932  includes the one or more illustrated components. The components within the communication manager  932  may be stored in the computer-readable medium/memory and/or configured as hardware within the baseband unit  904 . The baseband unit  904  may be a component of the BS  310  and may include the memory  376  and/or at least one of the TX processor  316 , the RX processor  370 , and the controller/processor  375 . 
     The communication manager  932  includes a configuration component  940  that transmits to a UE, an activation configuration activating a subset of configured UL-TCI states, e.g., as described in connection with  802  of  FIG. 8 . The communication manager  932  further includes a schedule component  942  that transmits, to the UE, DCI in a PDCCH scheduling an UL transmission with one or more TCI states of the activated TCI states, e.g., as described in connection with  804  of  FIG. 8 . The communication manager  932  further includes a map component  944  that transmits a mapping between activated TCI states and a set of codepoint values, e.g., as described in connection with  806  of  FIG. 8 . The communication manager  932  further includes an uplink component  946  that receives the UL transmission from the UE, e.g., as described in connection with  808  of  FIG. 8 . The communication manager  932  further includes a demodulation component  948  that demodulates the UL transmission, e.g., as described in connection with  810  of  FIG. 8 . 
     The apparatus may include additional components that perform each of the blocks of the algorithm in the aforementioned flowchart of  FIG. 8 . As such, each block in the aforementioned flowchart of  FIG. 8  may be performed by a component and the apparatus may include one or more of those components. The components may be one or more hardware components specifically configured to carry out the stated processes/algorithm, implemented by a processor configured to perform the stated processes/algorithm, stored within a computer-readable medium for implementation by a processor, or some combination thereof. 
     In one configuration, the apparatus  902 , and in particular the baseband unit  904 , includes means for transmitting, to a UE, a configuration of UL-TCI states and an activation of a subset of configured UL-TCI states. The apparatus includes means for transmitting, to the UE, DCI in a PDCCH scheduling an UL transmission with one or more TCI states of activated TCI states, the DCI scheduling an UL transmission. The apparatus includes means for receiving the UL transmission from the UE, the UL transmission based on the one or more TCI states. The apparatus includes means for demodulating the UL transmission based on the one or more TCI states. The apparatus further includes means for transmitting a mapping between activated TCI states and a set of codepoint values, the one or more codepoint values being within the set of codepoint values. The aforementioned means may be one or more of the aforementioned components of the apparatus  902  configured to perform the functions recited by the aforementioned means. As described supra, the apparatus  902  may include the TX Processor  316 , the RX Processor  370 , and the controller/processor  375 . As such, in one configuration, the aforementioned means may be the TX Processor  316 , the RX Processor  370 , and the controller/processor  375  configured to perform the functions recited by the aforementioned means. 
     It is understood that the specific order or hierarchy of blocks in the processes/flowcharts disclosed is an illustration of example approaches. Based upon design preferences, it is understood that the specific order or hierarchy of blocks in the processes/flowcharts may be rearranged. Further, some blocks may be combined or omitted. The accompanying method claims present elements of the various blocks in a sample order, and are not meant to be limited to the specific order or hierarchy presented. 
     The following examples are illustrative only and may be combined with aspects of other embodiments or teachings described herein, without limitation. 
     Aspect 1 is a method of wireless communication at a UE comprising receiving a configuration of UL-TCI states and an activation of a subset of configured UL-TCI states; receiving DCI in a PDCCH scheduling an UL transmission with one or more TCI states of activated TCI states; and transmitting the UL transmission based on the one or more TCI states. 
     In Aspect 2, the method of Aspect 1 further includes that the UL transmission is at least one of SRS, a PUCCH, a PUSCH, or a PRACH. 
     In Aspect 3, the method of Aspect 1 or 2 further includes that the configuration of UL-TCI states and the activation are received through an RRC signal and a MAC-CE, respectively. 
     In Aspect 4, the method of any of Aspects 1-3 further includes that transmitting the UL transmission comprises transmitting the UL transmission with a QCL property similar as a reference signal associated with the one or more TCI states. 
     In Aspect 5, the method of any of Aspects 1-4 further includes that the reference signal is further associated with a panel ID of the UE. 
     In Aspect 6, the method of any of Aspects 1-5 further includes that the QCL property comprises at least one of a one or more port indications, a Doppler shift, a Doppler spread, an average delay, a delay spread, a spatial Tx parameter, or a spatial Rx parameter. 
     In Aspect 7, the method of any of Aspects 1-6 further includes that the reference signal is one of SRS, or a DL RS. 
     In Aspect 8, the method of any of Aspects 1-7 further includes that the DL RS is one of CSI-RS, DM-RS for at least one of a PDSCH or a PDCCH, or a SS/PBCH block. 
     In Aspect 9, the method of any of Aspects 1-8 further includes that the DCI include s one or more codepoint values indicating the one or more TCI states of the activated TCI states. 
     In Aspect 10, the method of any of Aspects 1-9 further includes receiving a mapping between activated TCI states and a set of codepoint values, the one or more codepoint values being within the set of codepoint values. 
     Aspect 11 is a device including one or more processors and one or more memories in electronic communication with the one or more processors storing instructions executable by the one or more processors to cause the system or apparatus to implement a method as in any of Aspects 1-10. 
     Aspect 12 is a system or apparatus including means for implementing a method or realizing an apparatus as in any of Aspects 1-10. 
     Aspect 13 is a non-transitory computer readable medium storing instructions executable by one or more processors to cause the one or more processors to implement a method as in any of Aspects 1-10. 
     Aspect 14 is a method of wireless communication at a base station comprising transmitting, to a UE, a configuration of UL-TCI states and an activation of a subset of configured UL-TCI states; transmitting, to the UE, DCI in a PDCCH scheduling an UL transmission with one or more TCI states of activated TCI states, the DCI scheduling an UL transmission; receiving the UL transmission from the UE, the UL transmission based on the one or more TCI states; and demodulating the UL transmission based on the one or more TCI states. 
     In Aspect 15, the method of Aspect 14 further includes that the UL transmission is at least one of SRS, a PUCCH, a PUSCH, or a PRACH. 
     In Aspect 16, the method of Aspect 14 or 15 further includes that the configuration of UL-TCI states and the activation are received through an RRC signal and a MAC-CE, respectively. 
     In Aspect 17, the method of any of Aspects 14-16 further includes that the UL transmission is associated with a QCL property similar as a reference signal associated with the one or more TCI states. 
     In Aspect 18, the method of any of Aspects 14-17 further includes that the reference signal is further associated with a panel ID of the UE. 
     In Aspect 19, the method of any of Aspects 14-18 further includes that the QCL property comprises at least one of a one or more port indications, a Doppler shift, a Doppler spread, an average delay, a delay spread, a spatial Tx parameter, or a spatial Rx parameter. 
     In Aspect 20, the method of any of Aspects 14-19 further includes that the reference signal is one of SRS, or a DL RS. 
     In Aspect 21, the method of any of Aspects 14-20 further includes that the DL RS is one of CSI-RS, DM-RS for at least one of a PDSCH or a PDCCH, or a SS/PBCH block. 
     In Aspect 22, the method of any of Aspects 14-21 further includes that the DCI includes one or more codepoint values indicating the one or more TCI states of the activated TCI states 
     In Aspect 23, the method of any of Aspects 14-22 further includes transmitting a mapping between activated TCI states and a set of codepoint values, the one or more codepoint values being within the set of codepoint values. 
     Aspect 24 is a device including one or more processors and one or more memories in electronic communication with the one or more processors storing instructions executable by the one or more processors to cause the system or apparatus to implement a method as in any of Aspects 14-23. 
     Aspect 25 is a system or apparatus including means for implementing a method or realizing an apparatus as in any of Aspects 14-23. 
     Aspect 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 a method as in any of Aspects 14-23. 
     The previous description is provided to enable any person skilled in the art to practice the various aspects described herein. Various modifications to these aspects will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other aspects. Thus, the claims are not intended to be limited to the aspects shown herein, but is to be accorded the full scope consistent with the language claims, wherein reference to an element in the singular is not intended to mean “one and only one” unless specifically so stated, but rather “one or more.” Terms such as “if,” “when,” and “while” should be interpreted to mean “under the condition that” rather than imply an immediate temporal relationship or reaction. That is, these phrases, e.g., “when,” do not imply an immediate action in response to or during the occurrence of an action, but simply imply that if a condition is met then an action will occur, but without requiring a specific or immediate time constraint for the action to occur. The word “exemplary” is used herein to mean “serving as an example, instance, or illustration.” Any aspect described herein as “exemplary” is not necessarily to be construed as preferred or advantageous over other aspects. Unless specifically stated otherwise, 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” include any combination of A, B, and/or C, and may include multiples of A, multiples of B, or multiples of C. 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 A only, B only, C only, A and B, A and C, B and C, or A and B and C, where any such combinations may contain one or more member or members of A, B, or C. All structural and functional equivalents to the elements of the various aspects described throughout this disclosure that are known or later come to be known to those of ordinary skill in the art are expressly incorporated herein by reference and are intended to be encompassed by the claims. Moreover, nothing disclosed herein is intended to be dedicated to the public regardless of whether such disclosure is explicitly recited in the claims. The words “module,” “mechanism,” “element,” “device,” and the like may not be a substitute for the word “means.” As such, no claim element is to be construed as a means plus function unless the element is expressly recited using the phrase “means for.”