Method and apparatus for signaling uplink transmission configuration indicator status

Abstract

Techniques for signaling uplink transmission configuration indicator (TCI) states are disclosed. In an example, a base station may determine one or more capabilities of a user equipment (UE). The base station may also determine one or more uplink TCI states for use by the UE based on the one or more capabilities. The base station may also transmit signaling of the one or more uplink TCI states to the UE.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATION(S)

[0002] This application claims the benefit of U.S. Provisional Application No. 62 / 949,959, filed on December 18, 2019, entitled “Techniques for signaling uplink transmission configuration indicator states,” and U.S. Patent Application No. 17 / 081,602, filed on October 27, 2020, entitled “TECHNIQUES FOR SIGNALING UPLINK TRANSMISSION CONFIGURATION INDICATOR STATES,” both of which are expressly incorporated herein by reference in their entirety.

[0003] background

[0004] Aspects of the present disclosure relate generally to communication systems, and more particularly to techniques for signaling uplink transmission configuration indicator (TCI) status.

[0005] Wireless communication systems are widely deployed to provide various telecommunication services such as telephony, video, data, messaging, and broadcast. 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.

[0006] These multiple access technologies have been adopted in various telecommunication standards to provide common protocols that enable different wireless devices to communicate at city, country, region, and even global levels. An example telecommunication standard is the fifth generation (5G) new radio (NR) technology. 5G NR technology is part of the continuous mobile broadband evolution promulgated by the third generation partnership project (3GPP) to meet new requirements associated with latency, reliability, security, scalability (e.g., with the Internet of Things (IoT)) and other requirements. 5G NR technology 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 technology may be based on the fourth generation (4G) long term evolution (LTE) standard.

[0007] During beam management, different schemes including a spatial division multiplexing (SDM) scheme, a frequency division multiplexing (FDM) scheme, or a time division multiplexing (TDM) scheme may be used across multiple transmission reception points. These schemes may allow for a more unified TCI framework for downlink (DL) beam indication and uplink (UL) beam indication. Although wireless networks provide signaling for configuring DL transmissions according to different schemes, these wireless networks do not provide signaling for configuring UL transmissions based on each scheme. Accordingly, there is a need for further improvements in 5G NR technology.

[0008] Overview

[0009] A brief summary of one or more aspects is given below to provide a basic understanding of such aspects. This summary is not an exhaustive overview of all conceived aspects, and is neither intended to identify the key or critical elements of all aspects nor to define 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 a more detailed description that will be presented later.

[0010] In one aspect, a method for wireless communication by a user equipment (UE) is provided. The method may include: receiving signaling indicating one or more uplink (UL) transmission configuration indicator (TCI) states from a base station; configuring one or more UL TCI states to be used by the UE for UL transmission based on the signaling indicating the one or more UL TCI states; and transmitting a UL transmission based on the one or more UL TCI states to the base station.

[0011] In another aspect, a method for wireless communication by a UE is provided. The method may include: receiving signaling from a base station indicating a first UL TCI code point mapped to one or more first UL TCI states; determining that the one or more first UL TCI states of the first UL TCI code point are not configured for UL transmission; in response to the one or more first UL TCI states not being configured, determining one or more second UL TCI states configured as a default UL TCI code point for the UL transmission; and transmitting the UL transmission based on the one or more second UL TCI states to the base station.

[0012] In another aspect, a method for wireless communication by a base station is provided. The method may include: determining one or more capabilities of a UE; determining one or more UL TCI states for use by the UE based on the one or more capabilities; and transmitting signaling of the one or more UL TCI states to the UE.

[0013] In another aspect, a method for wireless communication by a base station is provided. The method may include: transmitting signaling to a UE indicating a first UL TCI code point mapped to one or more first UL TCI states; receiving an UL transmission of one or more second UL TCI states based on a default UL TCI code point from the UE in response to transmitting the signaling; determining based on the received UL transmission that the one or more first UL TCI states of the first code point are not configured for UL transmission; and storing an indication that the one or more first UL TCI states are not configured by the UE for UL transmission.

[0014] In one or more other aspects, apparatus and computer-readable media for performing the methods described herein are disclosed.

[0015] To achieve the foregoing and related ends, the one or more aspects include the features fully described below and particularly pointed out in the claims. The following description and drawings set forth in detail certain illustrative features of the one or more aspects. However, these features are merely indicative of several of the various ways in which the principles of the various aspects may be employed, and this description is intended to cover all such aspects and their equivalents. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The disclosed aspects will be described below in conjunction with the accompanying drawings, which are provided to illustrate rather than limit the disclosed aspects, wherein like reference numerals designate like elements, and wherein:

[0018] Figure 1 is a schematic diagram of an example wireless communication system and access network according to aspects of the present disclosure;

[0019] Figure 2 is a flow chart of an example method of wireless communication by a UE according to aspects of the present disclosure;

[0020] Figure 3 is a flow chart of another example method of wireless communication by a UE according to aspects of the present disclosure;

[0021] Figure 4 According to various aspects of the present disclosure Figure 1 A schematic diagram of an example of a UE;

[0022] Figure 5 is a flow chart of an example method of wireless communications by a base station according to aspects of the present disclosure;

[0023] Figure 6 is a flowchart of another example method of wireless communications by a base station according to aspects of the present disclosure; and

[0024] Figure 7 According to various aspects of the present disclosure Figure 1 A schematic diagram of an example of a base station.

[0025] Detailed Description

[0026] The detailed description set forth below in conjunction with the accompanying 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. This detailed description includes specific details to provide a thorough understanding of the 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 diluting such concepts.

[0027] 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 on the specific application and the design constraints imposed on the overall system.

[0028] As an example, an element, or any part of an element, or any combination of elements may be implemented as a "processing system" including 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 chip (SoCs), baseband processors, field programmable gate arrays (FPGAs), programmable logic devices (PLDs), state machines, gating logic, discrete hardware circuits, and other suitable hardware configured to perform various functionalities described throughout this disclosure. One or more processors in a processing system may execute software. Software should be broadly interpreted as meaning instructions, instruction sets, codes, code segments, program codes, programs, subroutines, software components, applications, software applications, software packages, routines, subroutines, objects, executables, threads of execution, procedures, functions, etc., whether it is described in software, firmware, middleware, microcode, hardware description languages, or other terms.

[0029] Accordingly, in one or more example embodiments, the functions described may be implemented in hardware, software, or any combination thereof. If implemented in software, these functions may be stored or encoded on a computer-readable medium as one or more instructions or codes. Computer-readable media include computer storage media. Storage media may be any available medium that can be accessed by a computer. As an example and not limitation, such computer-readable media may include random access memory (RAM), read-only memory (ROM), electrically erasable programmable ROM (EEPROM), optical disk storage, magnetic disk storage, other magnetic storage devices, a combination of computer-readable media of the above types, or any other medium that may be used to store computer-executable code in the form of instructions or data structures that can be accessed by a computer.

[0030] Enhancements to multi-beam operations, such as frequency range 2 (FR2) and frequency range 1 (FR1), may include identifying and specifying features for facilitating more efficient (e.g., lower latency and overhead) downlink (DL) / uplink (UL) beam management to support higher intra-cell mobility and layer 1 (L1) / layer 2 (L2) centric inter-cell mobility and / or a larger number of configured transmission configuration indicator (TCI) states. These features may include: shared beams for DL ​​and UL transmissions, particularly data and control transmission / reception for intra-band carrier aggregation (CA); a unified TCI framework for DL / UL beam indication; and enhancements to signaling mechanisms for the above features to improve latency and efficiency, such as more dynamic use of control signaling (as opposed to radio resource control (RRC) signals).

[0031] These enhancements may also include identifying and specifying features for facilitating UL beam selection for user equipment (UE) equipped with multiple panels, including: UL beam indication based on a unified TCI framework; enabling simultaneous transmission across multiple panels (STxMP); and / or enabling panel selection. These enhancements may also include studying UE-initiated or L1 event-driven beam management for reducing latency and the probability of beam failure events.

[0032] Additionally, enhancements to support for multiple transmit reception point (mTRP) deployments (which may target both FR1 and FR2) may include identifying and specifying features for using mTRP and / or multi-panels to improve stability and robustness (where reliability features are used as a benchmark) for channels other than the physical DL shared channel (PDSCH), such as the physical DL control channel (PDCCH), the physical UL shared channel (PUSCH), and the physical UL control channel (PUCCH). These enhancements may also include identifying and specifying features for enabling multi-TRP operation between cellular cells. These enhancements may also include evaluating and, if necessary, specifying enhancements for simultaneous multi-TRP transmissions with multi-panel reception.

[0033] For UL transmission, spatial division multiplexing (SDM) / frequency division multiplexing (FDM) / time division multiplexing (TRM) schemes across mTRPs can also be extended. By using these schemes for UL transmission, a more unified TCI framework for DL ​​beam indication and UL beam indication can be achieved. Alternatively, the introduction of a UL-TCI framework and support for UL-TCI-based signaling similar to DL beam indication can be considered to support multi-panel enhancements for UL. In the context of DL, these schemes are supported as follows: Scheme 1 - SDM; Scheme 2a - FDM and one control word (CW); Scheme 2b - FDM and two CWs in the same transport block (TB); Scheme 3 - TDM within a time slot; and Scheme 4 - TDM in different time slots. These schemes can be extended for UL.

[0034] According to various aspects of the present disclosure, multiple UL TCI states may be used to indicate UL transmissions. In an example, the multiple TCI states may be based on one or more SDM schemes, FDM schemes, or TDM schemes across the indicated UL TCI states.

[0035] In another aspect, multiple UL TCI states may be mapped to a single UL TCI code point of a DL configuration indicator (DCI) that is scheduling UL transmissions. The multiple UL TCI states may be indicated by signaling, such as one or more of a DCI signal, a media access control control element (MAC-CE) signal, or a radio resource control (RRC) signal. In some examples, the multiple UL TCI states are mapped to UL mTRP transmissions based on a single DCI.

[0036] In one aspect, multiple UL TCI states may be mapped to one composite mTRP UL TCI state in the DCI that is scheduling the UL transmission. Indications of these multiple UL TCI states may be signaled via, for example, a DCI signal, a MAC-CE signal, or an RRC signal. In one example, the UL transmission may include one or more sounding reference signals (SRS), PUCCH signals, PUSCH signals, or PRACH signals.

[0037] In the case of SDM, the UL signals indicated by the UL TCI states may be transmitted simultaneously in overlapping frequency resources. In the case of FDM, the UL signals indicated by the UL TCI states may be transmitted simultaneously in non-overlapping frequency resources. In the case of TDM, the signals indicated by the UL TCI states may be transmitted in different time resources (slot-based or sub-slot-based TDM).

[0038] On the other hand, at least one UL TCI code point may be mapped to multiple UL TCI states. For example, multiple UL TCI states may be mapped to a single DCI based on the UL mTRP operation mode. However, when the UE receives an indication of multiple UL TCI states, the UE may not be able to use some UL TCI states, for example, because the UL TCI state is not configured (for example, in the case where the relationship or UL TCI is not indicated for certain resources or when the scheduled UL transmission is within the time domain scheduling threshold). Accordingly, a default UL beam for SRS, PUCCH, PUSCH, or PRACH may be used based on a previously used TCI code point. In one example, the UL beam may depend on the lowest index or the highest index of a previously used UL TCI code point or on a most recently successfully used TCI code point.

[0039] Turning now to the drawings, various examples of techniques for signaling UL TCI status are depicted.It is to be understood that various aspects of the drawings may not be drawn to scale and are instead drawn for illustrative purposes.

[0040] refer to Figure 1 , a diagram illustrating an example of a wireless communication system and access network 100 is provided. The wireless communication system (also known as a wireless wide area network (WWAN)) includes a base station 102, a UE 104, an evolved packet core (EPC) 160, and a 5G core (5GC) 190.

[0041] The base station 102 may include a modem 140 having a TCI signaling component 142 configured to signal a plurality of TCI states and codepoints indicating the plurality of TCI states to the UE 104. For example, the TCI signaling component 142 may determine one or more capabilities of the UE 104, determine one or more UL TCI states for use by the UE 104 based on the one or more capabilities, and transmit signaling of the one or more UL TCI states to the UE 104.

[0042] In another example, the TCI signaling component 142 may transmit signaling to the UE 104 indicating a first UL TCI code point mapped to one or more first UL TCI states, receive an UL transmission of one or more second UL TCI states based on a default UL TCI code point from the UE 104 in response to transmitting the signaling, determine based on the received UL transmission that the one or more first UL TCI states of the first code point are not configured for UL transmission, and store an indication that the one or more first UL TCI states are not configured by the UE 104 for UL transmission.

[0043] The UE 104 may include a modem 144 having a UL configuration component 146 configured to receive signaling from the base station 102 and transmit an UL transmission based on the signaling. For example, the UL configuration component 146 may receive signaling from the base station 102 indicating a first UL TCI code point mapped to one or more first UL TCI states, determine that the one or more first UL TCI states of the first UL TCI code point are not configured for UL transmission, determine one or more second UL TCI states configured as default UL TCI code points for UL transmission in response to the one or more first UL TCI states not being configured, and transmit an UL transmission based on the one or more second UL TCI states to the base station.

[0044] In another example, the UL configuration component 146 may receive signaling from the base station 102 indicating a first UL TCI code point mapped to one or more first UL TCI states, determine that the one or more first UL TCI states of the first UL TCI code point are not configured for UL transmission, determine one or more second UL TCI states configured as default UL TCI code points for UL transmission in response to the one or more first UL TCI states not being configured, and transmit a UL transmission based on the one or more second UL TCI states to the base station.

[0045] In one aspect, base stations 102 may include macro cells (high power cellular base stations) and / or small cells (low power cellular base stations). Macro cells include base stations. Small cells include femto cells, pico cells, and micro cells.

[0046] The base station 102 configured for 4G LTE (collectively referred to as the Evolved Universal Mobile Telecommunications System (UMTS) Terrestrial Radio Access Network (E-UTRAN)) can interface with the EPC 160 via a backhaul link 132 (e.g., an S1 interface). The base station 102 configured for 5G NR (collectively referred to as the Next Generation RAN (NG-RAN)) can interface with the 5GC 190 via a backhaul link 184. Among other functions, the base station 102 can also perform one or more of the following functions: delivery of user data, radio 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), subscriber and equipment tracking, RAN information management (RIM), paging, positioning, and delivery of alert messages. Base stations 102 may communicate with each other directly or indirectly (e.g., through EPC 160 or 5GC 190) over backhaul links 134 (e.g., X2 interfaces). Each of backhaul links 132, 134, and 184 may be wired or wireless.

[0047] Base stations 102 may communicate wirelessly with UE 104. Each base station 102 may provide communication coverage for a respective geographic coverage area 110. There may be overlapping geographic coverage areas 110. For example, a small cell 102' may have a coverage area 110' that overlaps with the coverage area 110 of one or more macro base stations 102. A network including small cells and macro cells may be referred to as a heterogeneous network. A heterogeneous network may also include a home evolved B node (eNB) (HeNB), which may provide services to a restricted group referred to as a closed subscriber group (CSG). A communication link 120 between a base station 102 and a UE 104 may include a UL (also referred to as a reverse link) transmission from the UE 104 to the base station 102 and / or a DL (also referred to as a forward link) transmission from the base station 102 to the UE 104. The communication link 120 may use multiple input multiple output (MIMO) antenna technology, including spatial multiplexing, beamforming, and / or transmit diversity. These communication links may be through one or more carriers. The base station 102 / UE 104 may use spectrum of up to Y MHz (e.g., 5, 10, 15, 20, 100, 400 MHz, etc.) bandwidth for each carrier allocated in a carrier aggregation for a total of up to Yx MHz (x component carriers) for transmission in each direction. The carriers may or may not be adjacent to each other. The allocation of carriers may be asymmetric with respect to DL and UL (e.g., more or fewer carriers may be allocated to DL compared to UL). The component carriers may include a primary component carrier and one or more secondary component carriers. The primary component carrier may be referred to as a primary cell (PCell) and the secondary component carrier may be referred to as a secondary cell (SCell).

[0048] Some UEs 104 may communicate with each other using a device-to-device (D2D) communication link 158. The D2D communication link 158 may use 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). The D2D communication may be through a variety of wireless D2D communication systems, such as, for example, FlashLinQ, WiMedia, Bluetooth, ZigBee, Wi-Fi based on the IEEE 802.11 standard, LTE, or NR.

[0049] The wireless communication system may further include a Wi-Fi access point (AP) 150 communicating with a Wi-Fi station (STA) 152 in the 5 GHz unlicensed spectrum via a communication link 154. When communicating in the unlicensed spectrum, the STA 152 / AP 150 may perform a clear channel assessment (CCA) to determine whether the channel is available prior to communication.

[0050] The small cell 102' may operate in a licensed and / or unlicensed spectrum. When operating in an unlicensed spectrum, the small cell 102' may employ NR and use the same 5 GHz unlicensed spectrum as used by the Wi-Fi AP 150. The small cell 102' employing NR in the unlicensed spectrum may boost the coverage of the access network and / or increase the capacity of the access network.

[0051] Whether a small cell 102' or a large cell (e.g., a macro base station), the base station 102 may include an eNB, a gB node (gNB), or other types of base stations. Some base stations (such as gNB 180) may operate in traditional sub-6 GHz spectrum, millimeter wave (mmW) frequencies, and / or near mmW frequencies to communicate with UE 104. When gNB 180 operates in mmW or near mmW frequencies, gNB 180 may be referred to as a mmW base station. Extremely high frequency (EHF) is part of the RF in the electromagnetic spectrum. EHF has a range of 30 GHz to 300 GHz and a wavelength between 1 mm and 10 mm. The radio waves in this band may be referred to as millimeter waves. Near mmW can be extended down to 3 GHz frequencies with a wavelength of 100 mm. The super high frequency (SHF) band extends between 3 GHz and 30 GHz, which is also referred to as centimeter waves. Communications using mmW / near mmW radio frequency bands have extremely high path loss and short range. The mmW base station 180 may utilize beamforming 182 with the UE 104 to compensate for the extremely high path loss and short range.

[0052] 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 a control node that handles signaling between the UE 104 and the EPC 160. In general, the MME 162 provides bearer and connection management. All user Internet Protocol (IP) packets are delivered through the serving gateway 166, which itself is 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 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 functionality 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 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 base stations 102 belonging to a multicast broadcast single frequency network (MBSFN) area that broadcasts a specific service, and may be responsible for session management (start / stop) and for collecting eMBMS-related charging information.

[0053] 5GC 190 may include access and mobility management function (AMF) 192, other AMF 193, session management function (SMF) 194, and user plane function (UPF) 195. AMF 192 may be in communication with unified data management (UDM) 196. AMF 192 is a control node that handles signaling between UE 104 and 5GC 190. In general, AMF 192 provides QoS flow and session management. All user Internet Protocol (IP) packets are delivered through UPF 195. UPF 195 provides UE IP address allocation and other functions. UPF 195 is connected to IP service 197. IP service 197 may include the Internet, intranet, IP multimedia subsystem (IMS), PS streaming service, and / or other IP services.

[0054] Base station 102 may also be referred to as gNB, B node, evolved B node (eNB), access point, base transceiver station, radio base station, radio transceiver, transceiver function, basic service set (BSS), extended service set (ESS), transmission reception point (TRP), or some other suitable term. Base station 102 provides an access point to EPC 160 or 5GC 190 for UE 104. Examples of UE 104 include cellular phones, smart phones, session initiation protocol (SIP) phones, laptops, personal digital assistants (PDAs), satellite radios, global positioning systems, multimedia devices, video devices, digital audio players (e.g., MP3 players), cameras, game consoles, tablet devices, smart devices, wearable devices, vehicles, electric meters, gas pumps, large or small kitchen appliances, health care devices, implants, sensors / actuators, displays, or any other similar functional devices. Some UEs 104 may be referred to as IoT devices (e.g., parking meters, gas pumps, ovens, vehicles, heart monitors, etc.). 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 communication 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.

[0055] refer to Figure 2 and Figure 3 , discloses example methods 200 and 300 of wireless communication. The methods 200 and 300 may be performed by Figure 1 UE 104 together with any components of UE 104 (see, e.g. Figure 4 ) is performed. For example, the methods 200 and 300 may be performed by one or more of the processor 412, the transceiver 402, the modem 144, the UL configuration component 146, and / or one or more additional components / subcomponents of the UE 104.

[0056] Steering Figure 2At 202, the method 200 may optionally include transmitting an indication of one or more capabilities of the UE to a base station. For example, one or more of the processor 412, the transceiver 402, the modem 144, the UL configuration component 146, and / or one or more components / subcomponents of the UE 104 may be configured to transmit an indication of one or more capabilities of the UE 104 to the base station 102. Thus, the processor 412, the transceiver 402, the modem 144, the UL configuration component 146, and / or one or more components / subcomponents of the UE 104 may define means for transmitting an indication of one or more capabilities of the UE 104 to the base station 102. In an example, the one or more capabilities of the UE 104 may include, for example, an ability of the UE 104 to support multiple transmissions from multiple panels of the base station 102, or an ability of the UE 104 to support switching times between panels of the base station 102 for activating transmissions.

[0057] At 204, the method 200 may include receiving signaling indicating one or more UL TCI states from a base station. For example, one or more of the processor 412, transceiver 402, modem 144, UL configuration component 146, and / or one or more components / subcomponents of UE 104 may be configured to receive signaling indicating one or more UL TCI states from base station 102. Thus, the processor 412, transceiver 402, modem 144, UL configuration component 146, and / or one or more components / subcomponents of UE 104 may define a device for receiving signaling indicating one or more UL TCI states from base station 102. In one example, the signaling indicating one or more UL TCI states is indicated via a mapping of one or more UL TCI states to a single UL TCI code point. In one example, the signaling may be received via one or more of a DCI signal, a MAC-CE signal, or an RRC signal. In one example, the signaling may indicate the one or more UL TCI states via a mapping of one or more UL TCI states to a single composite mTRP UL TCI state.

[0058] In an example, one or more UL TCI states may be based on one or more of an SDM scheme, an FDM scheme, or a TDM scheme. When one or more UL TCI states are based on an SDM scheme, UL transmissions may be transmitted simultaneously in overlapping frequency resources. When one or more UL TCI states are based on an FDM scheme, UL transmissions may be transmitted simultaneously in non-overlapping frequency resources. When one or more UL TCI states are based on a TDM scheme, UL transmissions may be transmitted in different time resources.

[0059] At 206, the method 200 may include receiving signaling from the base station indicating a code point for scheduling one or more UL transmissions. For example, the processor 412, the transceiver 402, the modem 144, the UL configuration component 146, and / or one or more components / subcomponents of the UE 104 may be configured to receive signaling from the base station 102 indicating a code point for scheduling one or more UL transmissions. Thus, the processor 412, the transceiver 402, the modem 144, the UL configuration component 146, and / or one or more components / subcomponents of the UE 104 may define a means for receiving signaling from the base station 102 indicating a code point for scheduling one or more UL transmissions. In one example, the code point is a code, a string, or one or more bits of a DCI signal. In one example, the UL transmission is one or more of an SRS, a PUCCH, a PUSCH, or a PRACH.

[0060] At 208, the method 200 may include configuring one or more UL TCI states to be used by the UE for UL transmission based on the signaling indicating the one or more UL TCI states. For example, one or more of the processor 412, the modem 144, the UL configuration component 146, and / or one or more components / subcomponents of the UE 104 may be configured to configure one or more UL TCI states to be used by the UE 104 for UL transmission based on the signaling indicating the one or more UL TCI states. Thus, the processor 412, the modem 144, the UL configuration component 146, and / or one or more components / subcomponents of the UE 104 may define means for configuring one or more UL TCI states to be used by the UE 104 for UL transmission based on the signaling indicating the one or more UL TCI states. In an example, determining one or more UL TCI states may be further based on the signaling indicating a codepoint. In one example, one or more UL TCI states may be configured based on configuring one or more spatial relationship parameters of one or more beams and using ports or signals that satisfy quasi co-location (QCL) properties as indicated by the TCI state for UL transmission in scheduled time / frequency resources.

[0061] At 210, the method 200 may include transmitting, to the base station, a UL transmission based on the one or more UL TCI states. For example, one or more of the processor 412, the transceiver 402, the modem 144, the UL configuration component 146, and / or one or more components / subcomponents of the UE 104 may be configured to transmit, to the base station 102, a UL transmission based on the one or more UL TCI states. Thus, the processor 412, the transceiver 402, the modem 144, the UL configuration component 146, and / or one or more components / subcomponents of the UE 104 may define means for transmitting, to the base station 102, a UL transmission based on the one or more UL TCI states.

[0062] Steering Figure 3 At 302, the method 300 may include receiving signaling from a base station indicating a first UL TCI code point mapped to one or more first UL TCI states. For example, one or more of the processor 412, the transceiver 402, the modem 144, the UL configuration component 146, and / or one or more components / subcomponents of the UE 104 may be configured to receive signaling from the base station 102 indicating a first UL TCI code point mapped to one or more first UL TCI states. Thus, the processor 412, the transceiver 402, the modem 144, the UL configuration component 146, and / or one or more components / subcomponents of the UE 104 may define means for receiving signaling from the base station 102 indicating a first UL TCI code point mapped to one or more first UL TCI states.

[0063] At 304, the method 300 may include determining that the one or more first UL TCI states of the first UL TCI code point are not configured for UL transmission. For example, one or more of the processor 412, the modem 144, the UL configuration component 146, and / or one or more components / subcomponents of the UE 104 may be configured to determine that the one or more first UL TCI states of the first UL TCI code point are not configured for UL transmission. Thus, the processor 412, the transceiver, the modem 144, the UL configuration component 146, and / or one or more components / subcomponents of the UE 104 may define means for determining that the one or more first UL TCI states of the first UL TCI code point are not configured for UL transmission.

[0064] At 306, the method 300 may include determining one or more second UL TCI states configured as default UL TCI code points for UL transmissions in response to the one or more first UL TCI states not being configured. For example, one or more of the processor 412, the modem 144, the UL configuration component 146, and / or one or more components / subcomponents of the UE 104 may be configured to determine one or more second UL TCI states configured as default UL TCI code points for UL transmissions in response to the one or more first UL TCI states not being configured. Thus, the processor 412, the modem 144, the UL configuration component 146, and / or one or more components / subcomponents of the UE 104 may define a means for determining one or more second UL TCI states configured as default UL TCI code points for UL transmissions in response to the one or more first UL TCI states not being configured.

[0065] At 308, the method 300 may include transmitting to the base station an UL transmission based on the one or more second UL TCI states. For example, one or more of the processor 412, the transceiver 402, the modem 144, the UL configuration component 146, and / or one or more components / subcomponents of the UE 104 may be configured to transmit to the base station 102 an UL transmission based on the one or more second UL TCI states. Thus, the processor 412, the transceiver 402, the modem 144, the UL configuration component 146, and / or one or more components / subcomponents of the UE 104 may define means for transmitting to the base station 102 an UL transmission based on the one or more second UL TCI states.

[0066] Reference Figure 4 , one example of an implementation of the UE 104 may include various components, some of which have been described above, but also include components such as one or more processors 412, memory 416, and transceiver 402 in communication via one or more buses 444, which may operate in conjunction with the modem 144 to implement one or more of the functions of the methods 200 and 300 described herein. The one or more processors 412, modem 140, memory 416, transceiver 402, RF front end 488, and one or more antennas 465 may be configured to support voice and / or data calls (simultaneously or non-simultaneously) in one or more radio access technologies.

[0067] In one aspect, the one or more processors 412 may include a modem 144 using one or more modem processors. Various functions associated with the UL configuration component 146 may be included in the modem 144 and / or the processor 412, and in one aspect may be performed by a single processor, while in other aspects, different ones of the functions may be performed by a combination of two or more different processors. For example, in one aspect, the one or more processors 412 may include any one or any combination of a modem processor, or a baseband processor, or a digital signal processor, or a transmit processor, or a receiver processor, or a transceiver processor associated with the transceiver 402. In other aspects, some features of the one or more processors 412 and / or the modem 144 may be performed by the transceiver 402.

[0068] In addition, the memory 416 can be configured to store data used herein and / or local versions of one or more of the applications 475 or UL configuration component 146 and / or its subcomponents executed by the at least one processor 412. The memory 416 may include any type of computer-readable medium usable by a computer or the at least one processor 412, such as random access memory (RAM), read-only memory (ROM), tape, magnetic disk, optical disk, volatile memory, non-volatile memory, and any combination thereof. In one aspect, for example, when the UE 104 is operating the at least one processor 412 to execute the UL configuration component 146 and / or one or more subcomponents thereof, the memory 416 may be a non-transitory computer-readable storage medium storing one or more computer-executable codes defining the UL configuration component 146 and / or one or more subcomponents thereof and / or data associated therewith.

[0069] The transceiver 402 may include at least one receiver 406 and at least one transmitter 408. The receiver 406 may include hardware, firmware, and / or software code executable by a processor for receiving data, the code including instructions and stored in a memory (e.g., a computer-readable medium). The receiver 406 may be, for example, a radio frequency (RF) receiver. In one aspect, the receiver 406 may receive signals transmitted by at least one base station 102. In addition, the receiver 406 may process such received signals and may also obtain measurements of the signals, such as but not limited to Ec / Io, SNR, RSRP, RSSI, and the like. The transmitter 408 may include hardware, firmware, and / or software code executable by a processor for transmitting data, the code including instructions and stored in a memory (e.g., a computer-readable medium). Suitable examples of the transmitter 408 may include, but are not limited to, an RF transmitter. The transceiver 402, the receiver 406, and / or the transmitter 408 may be configured to operate in mmW frequencies and / or near mmW frequencies.

[0070] In addition, in an aspect, the UE 104 may include an RF front end 488 that may operate in communication with the one or more antennas 465 and the transceiver 402 for receiving and transmitting radio transmissions, such as wireless communications transmitted by at least one of the base stations 102 or wireless transmissions transmitted by the UE 104. The RF front end 488 may be connected to the one or more antennas 465 and may include one or more low noise amplifiers (LNAs) 490, one or more switches 492, one or more power amplifiers (PAs) 498, and one or more filters 496 for transmitting and receiving RF signals.

[0071] In one aspect, LNA 490 can amplify the received signal to a desired output level. In one aspect, each of LNA 490 can have a specified minimum and maximum gain value. In one aspect, RF front end 488 can use one or more switches 492 to select a particular LNA 490 and its specified gain value based on the desired gain value for a particular application.

[0072] One or more PAs 498 may be used by the RF front end 488 to amplify the signal to obtain an RF output at a desired output power level. In one aspect, each of the PAs 498 may have a specified minimum and maximum gain value. In one aspect, the RF front end 488 may use one or more switches 492 to select a particular PA 498 and its specified gain value based on the desired gain value for a particular application.

[0073] In addition, for example, one or more filters 496 can be used by the RF front end 488 to filter the received signal to obtain an input RF signal. Similarly, in one aspect, for example, a corresponding filter 496 can be used to filter the output from the corresponding PA 498 to produce an output signal for transmission. In one aspect, each of the filters 496 can be connected to a specific LNA 490 and / or PA 498. In one aspect, the RF front end 488 can use one or more switches 492 to select a transmit or receive path using a specified filter 496, LNA 490, and / or PA 498 based on a configuration specified by the transceiver 402 and / or processor 412.

[0074] As such, the transceiver 402 may be configured to transmit and receive wireless signals through one or more antennas 465 via the RF front end 488. In an aspect, the transceiver 402 may be tuned to operate at a specified frequency so that the UE 104 may communicate, for example, with one or more of the base stations 102 or one or more cells associated with the one or more of the base stations 102. In an aspect, the modem 144 may configure the transceiver 402 to operate at a specified frequency and power level based on a UE configuration of the UE 104 and a communication protocol used by the modem 144, for example.

[0075] In one aspect, the modem 144 can be a multi-band-multi-mode modem that can process digital data and communicate with the transceiver 402 so that the digital data is sent and received using the transceiver 402. In one aspect, the modem 144 can be multi-band and configured to support multiple frequency bands for a specific communication protocol. In one aspect, the modem 144 can be multi-mode and configured to support multiple operating networks and communication protocols. In one aspect, the modem 144 can control one or more components (e.g., RF front end 488, transceiver 402) in the UE 104 to achieve transmission and / or reception of signals from the network based on a specified modem configuration. In one aspect, the modem configuration can be based on the mode of the modem 144 and the frequency band in use. In another aspect, the modem configuration can be based on UE configuration information associated with the UE 104, such as provided by the network during cell selection and / or cell reselection.

[0076] refer to Figure 5 and Figure 6 , discloses example methods 500 and 600 of wireless communication. The methods 500 and 600 may be performed by Figure 1 The base station 102 together with any components of the base station 102 (see, e.g. Figure 7 ) is performed. For example, the methods 500 and 600 may be performed by one or more of the processor 712, the transceiver 702, the modem 140, the TCI signaling component 142, and / or one or more additional components / subcomponents of the base station 102.

[0077] Steering Figure 5 At 502, the method 500 may optionally include receiving an indication of one or more capabilities of the UE from the UE. For example, one or more of the processor 712, the transceiver 702, the modem 140, the TCI signaling component 142, and / or one or more components / subcomponents of the base station 102 may be configured to receive an indication of one or more capabilities of the UE 104 from the UE 104. Thus, the processor 712, the transceiver 702, the modem 140, the TCI signaling component 142, and / or one or more components / subcomponents of the base station 102 may define means for receiving an indication of one or more capabilities of the UE 104 from the UE 104. In an example, the one or more capabilities of the UE 104 may include, for example, the ability of the UE 104 to support multiple transmissions from multiple panels of the base station 102, or the ability of the UE 104 to support switching times between panels of the base station 102 for activating transmissions.

[0078] At 504, method 500 may include determining one or more capabilities of the UE. For example, one or more of the processor 712, the modem 140, the TCI signaling component 142, and / or one or more components / subcomponents of the base station 102 may be configured to determine one or more capabilities of the UE 104. Thus, the processor 712, the modem 140, the TCI signaling component 142, and / or one or more components / subcomponents of the base station 102 may define means for determining one or more capabilities of the UE 104. In an example, the one or more capabilities of the UE 104 may be determined based on a capability indication received from the UE 104. In another example, the one or more capabilities of the UE 104 may be determined based on stored data indicating the capabilities.

[0079] At 506, the method 500 may also determine one or more UL TCI states for use by the UE based on the one or more capabilities. For example, one or more of the processor 712, the modem 140, the TCI signaling component 142, and / or one or more components / subcomponents of the base station 102 may be configured to determine one or more UL TCI states for use by the UE 104 based on the one or more capabilities. Thus, the processor 712, the modem 140, the TCI signaling component 142, and / or one or more components / subcomponents of the base station 102 may define a means for determining one or more UL TCI states for use by the UE 104 based on the one or more capabilities. In an example, the one or more UL TCI states may be based on one or more of an SDM scheme, an FDM scheme, or a TDM scheme. In an example, the base station 102 may determine one or more UL TCI states for the UE 104 based on the capability of the UE 104 to allow mapping of multiple UL TCI states to the same code point. These capabilities may include, for example, UE 104 supporting simultaneous transmission from multiple panels (e.g., at the UE 104 side) (e.g., as in SDM), UE 104 supporting switching timing between different beams for continuous UL transmission (e.g., as in TDM), or UE 104 supporting multiple beams (e.g., TCI states) being transmitted simultaneously from the same panel but different resource blocks (RBs) (e.g., as in FDM).

[0080] At 508, the method 500 may also include transmitting signaling of the one or more UL TCI states to the UE. For example, one or more of the processor 712, the transceiver 702, the modem 140, the TCI signaling component 142, and / or one or more components / subcomponents of the base station 102 may be configured to transmit signaling of the one or more UL TCI states to the UE 104. Thus, the processor 712, the transceiver 702, the modem 140, the TCI signaling component 142, and / or one or more components / subcomponents of the base station 102 may define means for transmitting signaling of the one or more UL TCI states to the UE 104. In an example, the signaling of the one or more UL TCI states is transmitted via one or more of a DCI signal, a MAC-CE signal, or an RRC signal.

[0081] At 510, the method 500 may optionally include mapping the one or more UL TCI states to a code point of a signal that schedules one or more UL transmissions. For example, one or more of the processor 712, the modem 140, the TCI signaling component 142, and / or one or more components / subcomponents of the base station 102 may be configured to map the one or more UL TCI states to a code point of a signal that schedules one or more UL transmissions. Thus, the processor 712, the transceiver 702, the modem 140, the TCI signaling component 142, and / or one or more components / subcomponents of the base station 102 may define a device for mapping the one or more UL TCI states to a code point of a signal that schedules one or more UL transmissions. In an example, the code point may be a code, a string, or one or more bits of a DCI signal.

[0082] At 512, method 500 may include transmitting signaling indicating the codepoint to the UE. For example, one or more of processor 712, transceiver 702, modem 140, TCI signaling component 142, and / or one or more components / subcomponents of base station 102 may be configured to transmit signaling indicating the codepoint to UE 104. Thus, processor 712, transceiver 702, modem 140, TCI signaling component 142, and / or one or more components / subcomponents of base station 102 may define means for transmitting signaling indicating the codepoint to UE 104.

[0083] At 514, the method 500 may optionally include receiving an UL transmission from the UE in response to the signaling, wherein the UL transmission is based on the one or more UL TCI states. For example, one or more of the processor 712, the transceiver 702, the modem 140, the TCI signaling component 142, and / or one or more components / subcomponents of the base station 102 may be configured to receive an UL transmission from the UE 104 in response to the signaling, wherein the UL transmission is based on the one or more UL TCI states. Thus, the processor 712, the transceiver 702, the modem 140, the TCI signaling component 142, and / or one or more components / subcomponents of the base station 102 may define means for receiving an UL transmission from the UE 104 in response to the signaling, wherein the UL transmission is based on the one or more UL TCI states.

[0084] Steering Figure 6 At 602, the method 600 may include transmitting to the UE signaling indicating a first UL TCI code point mapped to one or more first UL TCI states. For example, one or more of the processor 712, the transceiver 702, the modem 140, the TCI signaling component 142, and / or one or more components / subcomponents of the base station 102 may be configured to transmit to the UE 104 signaling indicating a first UL TCI code point mapped to one or more first UL TCI states. Thus, the processor 712, the transceiver 702, the modem 140, the TCI signaling component 142, and / or one or more components / subcomponents of the base station 102 may define means for transmitting to the UE 104 signaling indicating a first UL TCI code point mapped to the one or more first UL TCI states. In an example, the one or more UL TCI states may be based on one or more of an SDM scheme, an FDM scheme, or a TDM scheme. In an example, a code point is a code, a string, or one or more bits of a DCI signal.

[0085] At 604, the method 600 may include receiving, from the UE in response to transmitting the signaling, an UL transmission of one or more second UL TCI states based on the default UL TCI code point. For example, one or more of the processor 712, the transceiver 702, the modem 140, the TCI signaling component 142, and / or one or more components / subcomponents of the base station 102 may be configured to receive, from the UE 104 in response to transmitting the signaling, an UL transmission of one or more second UL TCI states based on the default UL TCI code point. Thus, the processor 712, the transceiver 702, the modem 140, the TCI signaling component 142, and / or one or more components / subcomponents of the base station 102 may define means for receiving, from the UE 104 in response to transmitting the signaling, an UL transmission of one or more second UL TCI states based on the default UL TCI code point.

[0086] At 606, the method 600 may also include determining that the one or more first UL TCI states of the first code point are not configured for UL transmission based on the received UL transmission. For example, one or more of the processor 712, the modem 140, the TCI signaling component 142, and / or one or more components / subcomponents of the base station 102 may be configured to determine that the one or more first UL TCI states of the first code point are not configured for UL transmission based on the received UL transmission. Thus, the processor 712, the modem 140, the TCI signaling component 142, and / or one or more components / subcomponents of the base station 102 may define a means for determining that the one or more first UL TCI states of the first code point are not configured for UL transmission based on the received UL transmission. In an example, based on the one or more first UL TCI states not being ready in time for UL transmission, the first UL TCI state may not have been configured for UL transmission. In an example, based on the one or more first UL TCI states being received by the UE 104 within a time domain scheduling threshold, the first UL TCI state may not have been configured for UL transmission.

[0087] At 608, the method 600 may further include storing an indication that the one or more first UL TCI states are not configured by the UE for UL transmission. For example, one or more of the processor 712, the modem 140, the TCI signaling component 142, and / or one or more components / subcomponents of the base station 102 may be configured to store an indication that the one or more first UL TCI states are not configured by the UE 104 for UL transmission. Thus, the processor 712, the modem 140, the TCI signaling component 142, and / or one or more components / subcomponents of the base station 102 may define means for storing an indication that the one or more first UL TCI states are not configured by the UE 104 for UL transmission.

[0088] Reference Figure 7 , an example of an implementation of the base station 102 may include various components, some of which have been described above, but also include components such as one or more processors 712 and memory 716 in communication via one or more buses 744 and a transceiver 702, which can operate in conjunction with the modem 140 and TCI signaling component 142 to implement one or more of the functions of methods 500 and 600 described herein.

[0089] The transceiver 702, receiver 706, transmitter 708, one or more processors 712, memory 716, applications 775, bus 744, RF front end 788, LNA 790, switch 792, filter 796, PA 798, and one or more antennas 765 may be the same or similar to corresponding components of the UE 104 as described above, but are configured or otherwise programmed for base station operation rather than UE operation.

[0090] Some further example embodiments

[0091] An example method for wireless communication by a UE, comprising: receiving signaling indicating one or more uplink transmission configuration indicator (TCI) states from a base station; configuring one or more uplink TCI states to be used by the UE for uplink transmission based on the signaling indicating the one or more uplink TCI states; and transmitting an uplink transmission based on the one or more uplink TCI states to the base station.

[0092] The above example method further includes receiving signaling from a base station indicating a codepoint for scheduling one or more uplink transmissions.

[0093] One or more of the above example methods, wherein the code point is a code, a string, or one or more bits of a downlink configuration indicator (DCI).

[0094] One or more of the above example methods further include: transmitting an indication of one or more capabilities of the UE to a base station, wherein receiving the signaling is transmitted in response to the indication.

[0095] One or more of the above example methods, wherein the signaling indicating the one or more uplink TCI states is indicated via a mapping of the one or more uplink TCI states to a single uplink TCI code point.

[0096] One or more of the above-mentioned example methods, wherein the signaling indicating the one or more uplink TCI states is received via one or more of a downlink configuration indicator (DCI) signal, a media access control control element (MAC-CE) signal, or a radio resource control (RRC) signal.

[0097] One or more of the above-mentioned example methods, wherein the signaling indicates the one or more uplink TCI states via a mapping of the one or more uplink TCI states to a single composite multiple transmission reception point (mTRP) uplink TCI state.

[0098] One or more of the above example methods, wherein the uplink transmission is one or more of a sounding reference signal (SRS), a physical uplink control channel (PUCCH), a physical uplink shared channel (PUSCH), or a physical random access channel (PRACH).

[0099] One or more of the above-mentioned example methods, wherein the one or more uplink TCI states are based on one or more of a spatial division multiplexing (SDM) scheme, a frequency division multiplexing (FDM) scheme, or a time division multiplexing (TDM) scheme.

[0100] One or more of the above example methods, wherein when the one or more uplink TCI states are based on an SDM scheme, the uplink transmissions are transmitted simultaneously in overlapping frequency resources.

[0101] One or more of the above example methods, wherein when the one or more uplink TCI states are based on an FDM scheme, the uplink transmissions are transmitted simultaneously in non-overlapping frequency resources.

[0102] One or more of the above-mentioned example methods, wherein when the one or more uplink TCI states are based on a TDM scheme, the uplink transmission is transmitted in different time resources.

[0103] An example apparatus for wireless communications includes: a memory storing instructions; and at least one processor communicatively coupled to the memory and configured to perform any of the above example methods.

[0104] An example computer readable medium storing computer executable code includes code for performing any of the above example methods.

[0105] Another example apparatus includes means for performing any of the above example methods.

[0106] A second example method for wireless communication by a base station includes: determining one or more capabilities of a user equipment (UE); determining one or more uplink transmission configuration indicator (TCI) states for use by the UE based on the one or more capabilities; and transmitting signaling of the one or more uplink TCI states to the UE.

[0107] The above-mentioned second example method further includes: mapping the one or more uplink TCI states to a code point of a signal scheduling one or more uplink transmissions; and transmitting a signal indicating the code point to the UE.

[0108] One or more of the above second example methods, wherein the code point is a code, a string, or one or more bits of a downlink configuration indicator (DCI).

[0109] One or more of the above-mentioned second example methods further include: receiving an indication of one or more capabilities of the UE from the UE, wherein determining the one or more capabilities of the UE is in response to receiving the indication.

[0110] In one or more of the second example methods above, determining one or more capabilities of the UE is based on the stored settings.

[0111] One or more of the above-mentioned second example methods further include: receiving an uplink transmission from the UE in response to the signaling, wherein the uplink transmission is based on the one or more uplink TCI states.

[0112] One or more of the second example methods described above, wherein the uplink transmission is one of a sounding reference signal (SRS), a physical uplink control channel (PUCCH), a physical uplink shared channel (PUSCH), or a physical random access channel (PRACH).

[0113] One or more of the second example methods described above, wherein the signaling of the one or more uplink TCI states is transmitted via one or more of a downlink configuration indicator (DCI) signal, a media access control element (MAC-CE) signal, or a radio resource control (RRC) signal.

[0114] One or more of the above-mentioned second example methods, wherein the one or more uplink TCI states are based on one or more of a spatial division multiplexing (SDM) scheme, a frequency division multiplexing (FDM) scheme, or a time division multiplexing (TDM) scheme.

[0115] An example apparatus for wireless communication includes: a memory storing instructions; and at least one processor communicatively coupled to the memory and configured to perform any of the second example methods described above.

[0116] An example computer-readable medium storing computer-executable code includes code for executing any of the second example methods described above.

[0117] Another example apparatus includes means for performing any of the second example methods described above.

[0118] A third example method for wireless communication by a user equipment (UE), comprising: receiving signaling from a base station indicating a first uplink transmission configuration indicator (TCI) code point mapped to one or more first uplink TCI states; determining that the one or more first uplink TCI states of the first uplink TCI code point are not configured for uplink transmission; in response to the one or more first uplink TCI states not being configured, determining one or more second uplink TCI states of a default uplink TCI code point configured for uplink transmission; and transmitting an uplink transmission based on the one or more second uplink TCI states to the base station.

[0119] The above-mentioned third example method further includes: determining the index of the default uplink TCI code point mapped to the one or more second uplink TCI states, wherein the index of the default uplink TCI code point is sequentially higher or lower than the index of the first uplink TCI code point mapped to the one or more first uplink TCI states, and wherein the one or more second TCI states are determined based on the index of the default uplink TCI code point.

[0120] One or more of the above-mentioned third example methods further include: determining the index of the default uplink TCI code point mapped to the one or more second uplink TCI states, wherein the index of the default uplink TCI code point corresponds to the most recently used uplink TCI code point, and wherein the one or more second TCI states are determined based on the index of the default uplink TCI code point.

[0121] An example apparatus for wireless communication includes: a memory storing instructions; and at least one processor communicatively coupled to the memory and configured to perform any one of the third example methods described above.

[0122] An example computer-readable medium storing computer-executable code includes code for performing any of the third example methods described above.

[0123] Another example apparatus includes means for performing any of the third example methods described above.

[0124] A fourth example method for wireless communication by a base station, comprising: transmitting signaling to a user equipment (UE) indicating a first uplink transmission configuration indicator (TCI) code point mapped to one or more first uplink TCI states; receiving uplink transmissions of one or more second uplink TCI states based on a default uplink TCI code point from the UE in response to transmitting the signaling; determining based on the received uplink transmissions that the one or more first uplink TCI states of the first code point are not configured for uplink transmission; and storing an indication that the one or more first uplink TCI states are not configured by the UE for UL transmission.

[0125] An example apparatus for wireless communication includes: a memory storing instructions; and at least one processor communicatively coupled to the memory and configured to perform the fourth example method described above.

[0126] An example computer-readable medium storing computer-executable code includes code for executing the fourth example method described above.

[0127] Another example apparatus includes means for performing the fourth example method described above.

[0128] The above detailed description set forth above in conjunction with the accompanying drawings describes examples and does not represent the only examples that can be implemented or fall within the scope of the claims. The term "example" when used in this description means "used as an example, instance, or illustration", rather than "better than" or "better than other examples". This detailed description includes specific details to provide an understanding of the described techniques. However, these techniques can be practiced without these specific details. In some instances, well-known structures and devices are shown in block diagram form to avoid obscuring the concepts of the described examples.

[0129] Information and signals may be represented using any of a variety of different techniques and technologies. For example, data, instructions, commands, information, signals, bits, symbols, and chips that may be mentioned throughout the above description may be represented by voltages, currents, electromagnetic waves, magnetic fields or magnetic particles, optical fields or optical particles, computer executable codes or instructions stored on computer-readable media, or any combination thereof.

[0130] The various illustrative blocks and components described in conjunction with the disclosure herein may be implemented or executed with a specially programmed device, such as, but not limited to, a processor designed to perform the functions described herein, a digital signal processor (DSP), an ASIC, an FPGA or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof. The specially programmed processor may be a microprocessor, but in the alternative, the processor may be any conventional processor, controller, microcontroller, or state machine. The specially programmed processor may also be implemented as a combination of computing devices, for example, a combination of a DSP and a microprocessor, a plurality of microprocessors, one or more microprocessors in conjunction with a DSP core, or any other such configuration.

[0131] The functions described herein may be implemented in hardware, software executed by a processor, firmware, or any combination thereof. If implemented in software executed by a processor, each function may be stored as one or more instructions or codes on a non-transient computer-readable medium or transmitted by it. Other examples and implementations fall within the scope and spirit of the present disclosure and the appended claims. For example, due to the nature of software, the functions described above may be implemented using software, hardware, firmware, hard wiring, or any combination thereof executed by a specially programmed processor. The features that implement the functions may also be physically located in various locations, including being distributed so that the various parts of the functions are implemented at different physical locations. Moreover, as used herein (including in the claims), the "or" used in the enumeration of items followed by "at least one of" indicates a disjunctive enumeration, so that, for example, the enumeration of "at least one of A, B, or C" represents A or B or C or AB or AC or BC or ABC (i.e., A and B and C).

[0132] Computer-readable media include both computer storage media and communication media, including any media that facilitates a computer program to be transferred from one place to another. Storage media can be any available media that can be accessed by a general or special-purpose computer. As an example and not limitation, computer-readable media may include RAM, ROM, EEPROM, CD-ROM or other optical disk storage, disk storage or other magnetic storage devices, or any other medium that can be used to carry or store the desired program code means of an instruction or data structure form and can be accessed by a general or special-purpose computer or a general or special-purpose processor. Similarly, any connection is also properly referred to as a computer-readable medium. For example, if software is transmitted from a website, a server or other remote sources using a coaxial cable, a fiber optic cable, a twisted pair, a digital subscriber line (DSL), or wireless technologies such as infrared, radio, and microwaves, then the coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, radio, and microwaves are included in the definition of the medium. Disk and disc as used herein include compact disc (CD), laser disc, optical disc, digital versatile disc (DVD), floppy disk, and Blu-ray disc, wherein disk usually reproduces data magnetically, while disc reproduces data optically with laser. Combinations of the above media are also included in the scope of computer-readable media.

[0133] The previous description of the disclosure is provided to enable those skilled in the art to make or use the disclosure. Various modifications to the disclosure will be readily apparent to those skilled in the art, and the common principles defined herein may be applied to other variations without departing from the spirit or scope of the disclosure. In addition, although the elements of the described aspects and / or embodiments may be described or claimed in the singular, the plural is also contemplated unless explicitly stated to be limited to the singular. In addition, all or part of any aspect and / or embodiment may be used in conjunction with all or part of any other aspect and / or embodiment, unless otherwise stated. Thus, the disclosure is not limited to the examples and designs described herein, but should be granted the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for wireless communication by a user equipment (UE), comprising: receiving signaling indicating a plurality of uplink transmission configuration indicator (TCI) states, wherein the signaling indicating the plurality of uplink TCI states is indicated via a mapping of the plurality of uplink TCI states to a single uplink TCI code point that applies only to uplink transmissions; configuring, based on the signaling indicating the plurality of uplink TCI states, the plurality of uplink TCI states to be used by the UE for uplink transmission, wherein the plurality of uplink TCI states are based on more than one of a spatial division multiplexing (SDM) scheme, a frequency division multiplexing (FDM) scheme, or a time division multiplexing (TDM) scheme; as well as Transmitting the uplink transmission based on the multiple uplink TCI states.

2. The method of claim 1, further comprising: Signaling is received indicating a codepoint at which one or more of the uplink transmissions are scheduled.

3. The method of claim 2, wherein the code point is a code, a string, or one or more bits of a downlink configuration indicator (DCI).

4. The method of claim 1, further comprising: An indication of one or more capabilities of the UE is transmitted, wherein receiving the signaling is transmitted in response to the indication.

5. The method of claim 1, wherein the signaling indicating the plurality of uplink TCI states is received via one or more of a downlink configuration indicator (DCI) signal, a medium access control control element (MAC-CE) signal, or a radio resource control (RRC) signal.

6. The method of claim 1, wherein the uplink transmission is one or more of a sounding reference signal (SRS), a physical uplink control channel (PUCCH), a physical uplink shared channel (PUSCH), or a physical random access channel (PRACH).

7. The method of claim 1, wherein when the multiple uplink TCI states are based on the SDM scheme, the uplink transmissions are transmitted simultaneously in overlapping frequency resources.

8. The method of claim 1, wherein when the multiple uplink TCI states are based on the FDM scheme, the uplink transmissions are transmitted simultaneously in non-overlapping frequency resources.

9. The method of claim 1, wherein when the multiple uplink TCI states are based on the TDM scheme, the uplink transmissions are transmitted in different time resources.

10. A method for wireless communication by a node, comprising: determining one or more capabilities of a user equipment (UE); determining a plurality of uplink transmission configuration indicator (TCI) states for use by the UE based on the one or more capabilities, wherein the plurality of uplink TCI states are based on more than one of a spatial division multiplexing (SDM) scheme, a frequency division multiplexing (FDM) scheme, or a time division multiplexing (TDM) scheme; as well as Signaling of the multiple uplink TCI states is transmitted, wherein the signaling of the multiple uplink TCI states is indicated via a mapping of the multiple uplink TCI states to a single uplink TCI code point that applies only to uplink transmissions.

11. The method of claim 10, further comprising: mapping the plurality of uplink TCI states to code points of a signal scheduling one or more uplink transmissions; as well as Signaling indicating the codepoint is transmitted.

12. The method of claim 11, wherein the code point is a code, a string, or one or more bits of a downlink configuration indicator (DCI).

13. The method of claim 10, further comprising: An indication of the one or more capabilities of the UE is received, wherein determining the one or more capabilities of the UE is responsive to receiving the indication.

14. The method of claim 10, wherein determining the one or more capabilities of the UE is based on stored settings.

15. The method of claim 10, wherein the uplink transmission is one of a sounding reference signal (SRS), a physical uplink control channel (PUCCH), a physical uplink shared channel (PUSCH), or a physical random access channel (PRACH).

16. The method of claim 10, wherein the signaling of the plurality of uplink TCI states is transmitted via one or more of a downlink configuration indicator (DCI) signal, a medium access control control element (MAC-CE) signal, or a radio resource control (RRC) signal.

17. A user equipment (UE), comprising: a memory for storing instructions; as well as one or more processors communicatively coupled to the memory and configured to: receiving signaling indicating a plurality of uplink transmission configuration indicator (TCI) states, wherein the signaling indicating the plurality of uplink TCI states is indicated via a mapping of the plurality of uplink TCI states to a single uplink TCI code point that applies only to uplink transmissions; configuring, based on the signaling indicating the plurality of uplink TCI states, the plurality of uplink TCI states to be used by the UE for uplink transmission, wherein the plurality of uplink TCI states are based on more than one of a spatial division multiplexing (SDM) scheme, a frequency division multiplexing (FDM) scheme, or a time division multiplexing (TDM) scheme; as well as Transmitting the uplink transmission based on the multiple uplink TCI states.

18. The UE of claim 17, wherein the one or more processors are further configured to receive signaling indicating a codepoint for scheduling one or more of the uplink transmissions.

19. The UE of claim 18, wherein the code point is a code, a string, or one or more bits of a downlink configuration indicator (DCI).

20. The UE of claim 17, wherein the one or more processors are further configured to transmit an indication of one or more capabilities of the UE, wherein the signaling is received in response to the indication being transmitted.

21. The UE of claim 17, wherein the signaling indicating the multiple uplink TCI states is received via one or more of a downlink configuration indicator (DCI) signal, a media access control control element (MAC-CE) signal, or a radio resource control (RRC) signal.

22. The UE of claim 17, wherein the uplink transmission is one or more of a sounding reference signal (SRS), a physical uplink control channel (PUCCH), a physical uplink shared channel (PUSCH), or a physical random access channel (PRACH).

23. The UE of claim 17, wherein when the multiple uplink TCI states are based on the SDM scheme, the uplink transmissions are transmitted simultaneously in overlapping frequency resources.

24. The UE of claim 17, wherein when the one or more uplink TCI states are based on the FDM scheme, the uplink transmissions are transmitted simultaneously in non-overlapping frequency resources.

25. The UE of claim 17, wherein the uplink transmissions are transmitted in different time resources when the one or more uplink TCI states are based on the TDM scheme.

26. A node, comprising: a memory for storing instructions; as well as one or more processors communicatively coupled to the memory and configured to: determining one or more capabilities of a user equipment (UE); determining a plurality of uplink transmission configuration indicator (TCI) states for use by the UE based on the one or more capabilities, wherein the plurality of uplink TCI states are based on more than one of a spatial division multiplexing (SDM) scheme, a frequency division multiplexing (FDM) scheme, or a time division multiplexing (TDM) scheme; as well as Signaling of the multiple uplink TCI states is transmitted, wherein the signaling of the multiple uplink TCI states is indicated via a mapping of the multiple uplink TCI states to a single uplink TCI code point that applies only to uplink transmissions.

27. The node of claim 26, wherein the one or more processors are further configured to: mapping the one or more uplink TCI states to code points of a signal scheduling one or more uplink transmissions; and Signaling indicating the codepoint is transmitted.

28. The node of claim 27, wherein the code point is a code, a string, or one or more bits of a downlink configuration indicator (DCI).

29. The node of claim 26, wherein the one or more processors are further configured to: An indication of the one or more capabilities of the UE is received, wherein the one or more capabilities of the UE are determined in response to receiving the indication.

30. The node of claim 26, wherein determining the one or more capabilities of the UE is based on stored settings.

31. The node of claim 26, wherein the uplink transmission is one of a sounding reference signal (SRS), a physical uplink control channel (PUCCH), a physical uplink shared channel (PUSCH), or a physical random access channel (PRACH).

32. The node of claim 26, wherein the signaling of the plurality of uplink TCI states is transmitted via one or more of a downlink configuration indicator (DCI) signal, a medium access control control element (MAC-CE) signal, or a radio resource control (RRC) signal.

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