Enhanced MAC-CE and RRC IE for multi-carrier configuration

Abstract

Currently, MIMO MAC-CE is designed to support only one component carrier. The aspects described herein provide MAC-CE and RRC signaling that facilitate efficient spatial and beamforming indication for multiple component carriers. The UE can be configured to receive configuration for each of the multiple carriers. The UE can be configured to receive control information in the MAC-CE. The control information may include at least one of TCI state, CSI-RS resource configuration, or SRS resource configuration. The UE can also be configured to determine whether the control information is applied to multiple carriers from the multiple carriers. The UE can be configured to apply control information to at least one carrier from the multiple carriers based on the determination regarding whether the control information is applied to multiple carriers from the multiple carriers.

Description

[0001] Cross-references to related applications

[0002] This application claims the benefit of international application No. PCT / CN2019 / 089511, filed on May 31, 2019, entitled “Enhanced MAC-CE and RRCIE for Multi-Carrier Configurations,” which is expressly incorporated herein by reference in its entirety. Technical Field

[0003] In summary, this disclosure relates to communication systems, and more specifically, to multi-carrier (MC) configurations. Background Technology

[0004] Wireless communication systems are widely deployed to provide a variety of telecommunications services such as telephone, video, data, messaging, and broadcasting. Typical wireless communication systems employ multiple access technologies that enable 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.

[0005] These multiple access technologies have been adopted in various telecommunications standards to provide a common protocol that enables different wireless devices to communicate at the city, country, region, and even global levels. An example telecommunications standard is 5G New Radio (NR). 5G NR is part of the Continuous Mobile Broadband Evolution (CMB) initiative released by the 3rd 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 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 can be based on the 4G Long Term Evolution (LTE) standard. There is a need for further improvements to 5G NR technology. These improvements can also be applied to other multiple access technologies and telecommunications standards that adopt them. Summary of the Invention

[0006] The following is a simplified overview of one or more aspects to provide a basic understanding of such aspects. This overview is not an exhaustive summary of all anticipated aspects, nor is it intended to identify key or important elements of all aspects, nor to depict 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 descriptions given later.

[0007] Multiple-input multiple-output (MIMO) medium access control (MAC) elements (CEs) (e.g., in 5G NR) may support only one component carrier (e.g., only one serving cell identifier (ID)). Such MIMO MAC-CEs supporting a single component carrier may include beam-switching states, transport configuration indication (TCI) states, etc. Therefore, the network may send a separate MAC-CE for each component carrier, which increases overhead and reduces throughput. This problem can be further exacerbated by frequent beam-switching (e.g., in field-mobile scenarios). In some aspects, such as beam management, user equipment (UE) receives all component carriers in a shared spatial direction. Due to the complexities involved in beam management, UE antenna structure, etc., deployments can use a shared spatial direction approach. The aspects described herein provide MAC-CEs and radio resource control (RRC) signaling that facilitate efficient spatial and beam change indication for multiple component carriers.

[0008] In one aspect of this disclosure, a method, computer-readable medium, and apparatus are provided. The apparatus may be a wireless device, such as a UE. The apparatus may be configured to receive configuration for each of a plurality of carriers. The apparatus may be configured to receive control information in a MAC-CE and determine whether the control information is applied to multiple carriers from the plurality of carriers. The apparatus may be configured to apply control information to at least one carrier of the plurality of carriers based on the determination of whether the control information is applied to multiple carriers from the plurality of carriers. The control information may include at least one of, for example, TCI state, Channel State Information Reference Signal (CSI-RS) resource configuration, or Sounding Reference Signal (SRS) resource configuration.

[0009] In one aspect of this disclosure, a method, computer-readable medium, and apparatus are provided. The apparatus may be a wireless device, such as a base station. The apparatus may be configured to configure a UE for use on a plurality of carriers. The apparatus may be configured to transmit control information to the UE in a MAC-CE and provide the UE with indications regarding the application of the control information to multiple carriers among the plurality of carriers. The control information may include, for example, at least one of TCI state, CSI-RS resource configuration, or SRS resource configuration.

[0010] To achieve the foregoing and related objectives, one or more aspects include the features fully described below and specifically pointed out in the claims. The following description and drawings set forth certain illustrative features of one or more aspects in detail. However, these features indicate only a few of the various ways in which the principles of each aspect may be employed, and this description is intended to include all such aspects and their equivalents. Attached Figure Description

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

[0012] Figure 2A , 2B Figures 2C and 2D are examples illustrating the DL channel in the first 5G / NR frame, the DL channel in the 5G / NR subframe, the UL channel in the second 5G / NR frame, and the UL channel in the 5G / NR subframe, respectively.

[0013] Figure 3 This is a diagram illustrating examples of base stations and user equipment (UEs) in an access network.

[0014] Figure 4 This is a diagram illustrating the advantages of enhanced MAC-CE and RRC IE for multi-carrier configurations.

[0015] Figure 5 This is a diagram illustrating an example of enhanced MAC-CE and RRC IE for multi-carrier configuration.

[0016] Figure 6 This is a flowchart of a wireless communication method.

[0017] Figure 7 This is a conceptual data flow diagram illustrating the data flow between different units / components in the example device.

[0018] Figure 8 This is a diagram illustrating an example of a hardware implementation for a device employing a processing system.

[0019] Figure 9 This is a flowchart of a wireless communication method.

[0020] Figure 10 This is a conceptual data flow diagram illustrating the data flow between different units / components in the example device.

[0021] Figure 11 This is a diagram illustrating an example of a hardware implementation for a device employing a processing system. Detailed Implementation

[0022] The detailed description below, taken in conjunction with the accompanying drawings, is intended as a description of various configurations and not as representing only the configurations in which the concepts described herein can be implemented. To provide a thorough understanding of the various concepts, the detailed description includes specific details. However, it will be apparent to those skilled in the art that these concepts can be implemented without these specific details. In some instances, well-known structures and components are shown in block diagram form to avoid obscuring such concepts.

[0023] Several aspects of a telecommunications system will now be described with reference to various apparatuses and methods. These apparatuses and methods will be described in detail below and illustrated in the accompanying drawings, by way of various blocks, components, circuits, processes, algorithms, etc. (collectively referred to as "elements"). These elements can be implemented using electronic hardware, computer software, or any combination thereof. Whether these elements are implemented as hardware or software depends on the specific application and the design constraints imposed on the overall system.

[0024] For example, an element, any part of an element, or any combination of elements can be implemented as a "processing system" that includes one or more processors. Examples of processors include: microprocessors, microcontrollers, graphics processing units (GPUs), central processing units (CPUs), application processors, digital signal processors (DSPs), reduced instruction set computing (RISC) processors, system-on-a-chip (SoCs), 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 functions described throughout this disclosure. One or more processors in a processing system can execute software. Whether referred to as software, firmware, middleware, microcode, hardware description language, or other names, software should be interpreted broadly as meaning instructions, instruction sets, code, code segments, program code, programs, subroutines, software components, applications, software applications, software packages, routines, subroutines, objects, executable files, threads of execution, procedures, functions, etc.

[0025] Accordingly, in one or more example embodiments, the described functionality can be implemented using hardware, software, or any combination thereof. If implemented in software, the functionality can be stored on or encoded as one or more instructions or code on a computer-readable medium. A computer-readable medium includes a computer storage medium. The storage medium can be any available medium accessible by a computer. By way of example, and not limitation, such a computer-readable medium can include random access memory (RAM), read-only memory (ROM), electrically erasable programmable ROM (EEPROM), optical disk storage, magnetic disk storage, other magnetic storage devices, combinations of computer-readable media of the types described above, or any other medium capable of storing computer-executable code in the form of instructions or data structures accessible by a computer.

[0026] Figure 1 This diagram illustrates an example of a wireless communication system and access network 100. The wireless communication system (also referred to as a wireless wide area network (WWAN)) includes base station 102, UE 104, evolved packet core (EPC) 160, and another core network 190 (e.g., a 5G core (5GC)). Base station 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 femtocells, picocells, and microcells.

[0027] Base station 102 configured for 4G LTE (collectively referred to as Evolved Universal Mobile Telecommunications System (UMTS) Terrestrial Radio Access Network (E-UTRAN)) can be interface-connected to EPC 160 via backhaul link 132 (e.g., S1 interface). Base station 102 configured for 5G NR (collectively referred to as Next Generation RAN (NG-RAN)) can be interface-connected to core network 190 via backhaul link 184. Among other functions, base station 102 can also perform one or more of the following functions: transmission 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), user and device tracking, RAN information management (RIM), paging, location, and delivery of warning messages. Base stations 102 can communicate with each other directly or indirectly (e.g., via EPC 160 or core network 190) via backhaul link 134 (e.g., X2 interface). Backhaul link 134 can be wired or wireless.

[0028] Base station 102 can communicate wirelessly with UE 104. Each base station 102 in the base station 102 can provide communication coverage for a corresponding geographic coverage area 110. Overlapping geographic coverage areas 110 may exist. For example, a small cell 102' may have a coverage area 110' that overlaps with the coverage areas 110 of one or more macro base stations 102. A network that includes both small cells and macro cells can be referred to as a heterogeneous network. The heterogeneous network may also include evolved home node B (eNB) (HeNB), which can provide services to restricted groups referred to as closed user groups (CSG). The communication link 120 between base station 102 and UE 104 may include uplink (UL) (also referred to as reverse link) transmission from UE 104 to base station 102 and / or downlink (DL) (also referred to as forward link) transmission from base station 102 to UE 104. The communication link 120 may use multiple-input multiple-output (MIMO) antenna technology, which includes spatial multiplexing, beamforming, and / or transmit diversity. The communication link can be via one or more carriers. Base station 102 / UE 104 can use a spectrum of up to Y MHz (e.g., 5, 10, 15, 20, 100, 400 MHz, etc.) bandwidth allocated to each carrier in a carrier aggregation for transmission in each direction. Carriers can be adjacent to each other or can be non-adjacent. Carrier allocation can be asymmetric with respect to DL and UL (e.g., more or fewer carriers can be allocated to DL compared to UL). Component carriers can include primary component carriers and one or more secondary component carriers. The primary component carrier can be referred to as the primary cell (PCell), and the secondary component carriers can be referred to as secondary cells (SCells).

[0029] Some UEs 104 can communicate with each other using device-to-device (D2D) communication link 158. D2D communication link 158 can use DL / UL WWAN spectrum. D2D communication link 158 can use one or more sideline channels, such as the Physical Sideline Broadcast Channel (PSBCH), Physical Sideline Discovery Channel (PSDCH), Physical Sideline Shared Channel (PSSCH), and Physical Sideline Control Channel (PSCCH). D2D communication can be achieved through a variety of wireless D2D communication systems, such as FlashLinQ, WiMedia, Bluetooth, ZigBee, Wi-Fi based on the IEEE 802.11 standard, LTE, or NR.

[0030] The wireless communication system may also include a Wi-Fi access point (AP) 150 that communicates with a Wi-Fi station (STA) 152 via a communication link 154 in the 5 GHz unlicensed spectrum. When communicating in the unlicensed spectrum, the STA 152 / AP 150 may perform a free channel assessment (CCA) before communication to determine whether the channel is available.

[0031] Small cell 102' can operate in licensed and / or unlicensed spectrum. When operating in unlicensed spectrum, small cell 102' can employ NR and use the same 5GHz unlicensed spectrum as the Wi-Fi AP 150. Small cell 102' employing NR in unlicensed spectrum can improve coverage and / or increase the capacity of the access network.

[0032] Base station 102 (whether it is a small cell 102' or a large cell (e.g., a macro base station)) may include an eNB, a gNodeB (gNB), or another type of base station. Some base stations (such as gNB 180) may operate in conventional 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 an mmW base station. Extremely high frequency (EHF) is a portion of the electromagnetic spectrum of radio frequency (RF). EHF has a range of 30 GHz to 300 GHz and wavelengths between 1 mm and 10 mm. Radio waves in this band may be referred to as millimeter waves. Near-mmW can extend down to frequencies of 3 GHz with wavelengths of 100 mm. Ultra-high frequency (SHF) bands extend between 3 GHz and 30 GHz and are also referred to as centimeter waves. Communication using mmW / near-mmW RF bands (e.g., 3 GHz–300 GHz) has extremely high path loss and short range. The mmW base station 180 can utilize beamforming 182 with the UE 104 to compensate for extremely high path loss and short range.

[0033] Base station 180 may transmit beamforming signals to UE 104 in one or more transmit directions 182'. UE 104 may receive beamforming signals from base station 180 in one or more receive directions 182'. UE 104 may also transmit beamforming signals to base station 180 in one or more transmit directions. Base station 180 may receive beamforming signals from UE 104 in one or more receive directions. Base station 180 / UE 104 may perform beamforming training to determine the optimal receive and transmit directions for each of base station 180 / UE 104. The transmit and receive directions of base station 180 may be the same or different. The transmit and receive directions of UE 104 may be the same or different.

[0034] EPC 160 may include Mobility Management Entity (MME) 162, other MMEs 164, Serving Gateway 166, Multimedia Broadcast Multicast Service (MBMS) Gateway 168, Broadcast Multicast Service Center (BM-SC) 170, and Packet Data Network (PDN) Gateway 172. MME 162 can communicate with Home Subscriber Server (HSS) 174. MME 162 is the control node that handles signaling between UE 104 and EPC 160. Typically, MME 162 provides bearer and connection management. All user Internet Protocol (IP) packets are transmitted through Serving Gateway 166, which is itself connected to PDN Gateway 172. PDN Gateway 172 provides UE IP address allocation and other functions. PDN Gateway 172 and BM-SC 170 are connected to IP Service 176. IP Service 176 may include the Internet, intranet, IP Multimedia Subsystem (IMS), PS streaming service, and / or other IP services. The BM-SC 170 can provide functions for the provisioning and delivery of MBMS user services. The BM-SC 170 can act as an entry point for MBMS transmissions for content providers, authorize and initiate MBMS bearer services within a Public Land Mobile Network (PLMN), and schedule MBMS transmissions. The MBMS gateway 168 can distribute MBMS services to base stations 102 belonging to Multicast-Broadcast Single Frequency Network (MBSFN) areas belonging to broadcast-specific services, and can be responsible for session management (start / stop) and collecting billing information related to eMBMS.

[0035] The core network 190 may include an Access and Mobility Management Function (AMF) 192, other AMFs 193, a Session Management Function (SMF) 194, and a User Plane Function (UPF) 195. AMF 192 can communicate with a Unified Data Management (UDM) 196. AMF 192 is the control node that processes signaling between UE 104 and the core network 190. Typically, AMF 192 provides QoS streaming and session management. All user Internet Protocol (IP) packets are transmitted through UPF 195. UPF 195 provides UE IP address allocation and other functions. UPF 195 connects to IP service 197. IP service 197 may include the Internet, intranet, IP Multimedia Subsystem (IMS), PS streaming service, and / or other IP services.

[0036] A base station may also be referred to as a gNB, Node B, Evolved Node B (eNB), access point, base transceiver, wireless base station, wireless transceiver, transceiver functional unit, Basic Services Set (BSS), Extended Services Set (ESS), Transmitter Receiver Point (TRP), or some other suitable term. Base station 102 provides UE 104 with access to EPC 160 or core network 190. Examples of UE 104 include cellular phones, smartphones, Session Initiation Protocol (SIP) phones, laptops, personal digital assistants (PDAs), satellite radio units, global positioning systems, multimedia devices, video devices, digital audio players (e.g., MP3 players), cameras, game consoles, tablet devices, smart devices, wearable devices, vehicles, electricity meters, air pumps, large or small kitchen appliances, healthcare devices, implants, sensors / actuators, displays, or any other similarly functional devices. Some UE 104 devices may be referred to as IoT devices (e.g., parking meters, air pumps, toasters, vehicles, heart monitors, etc.). UE 104 may also be referred to as a station, mobile station, user station, mobile unit, user unit, radio unit, remote unit, mobile device, radio device, wireless communication device, remote device, mobile user station, access terminal, mobile terminal, radio terminal, remote terminal, mobile phone, user agent, mobile client, client, or any other suitable term.

[0037] Refer again Figure 1 In some aspects, base station 102 / 180 may include a multicarrier configuration component 198 for configuring UE 104 for multiple carriers. The multicarrier configuration component 198 may be configured to send control information to the UE in a MAC-CE and provide the UE 104 with an indication that the control information will be applied to multiple carriers among a plurality of carriers. The control information may include at least one of TCI status, CSI-RS resource configuration, or SRS resource configuration or PUCCH spatial relationship indication. UE 104 may include a multicarrier configuration component 199 for receiving configurations for each of the plurality of carriers. The multicarrier configuration component 199 may be configured to receive the control information in a MAC-CE and determine whether the control information is applied to multiple carriers from the plurality of carriers. UE 104 may be configured to apply the control information to at least one carrier among the plurality of carriers based on the determination of whether the control information is applied to multiple carriers from the plurality of carriers. Although the following description may focus on 5G NR, the concepts described herein can be applied to other similar areas such as LTE, LTE-A, CDMA, GSM and other wireless technologies.

[0038] Figure 2AFigure 200 shows an example of the first subframe within a 5G / NR frame structure. Figure 2B Figure 230 shows an example of a DL channel within a 5G / NR subframe. Figure 2C Figure 250 shows an example of a second subframe within a 5G / NR frame structure. Figure 2D Figure 280 illustrates an example of a UL channel within a 5G / NR subframe. The 5G / NR frame structure can be FDD (where subframes within a specific set of subcarriers (carrier system bandwidth) are dedicated to either DL or UL), or TDD (where subframes within a specific set of subcarriers (carrier system bandwidth) are dedicated to both DL and UL). Figure 2A , 2C In the provided example, the 5G / NR frame structure is assumed to be TDD, where subframe 4 is configured with slot format 28 (mostly DL), where D is DL, U is UL, and X is flexible between DL / UL, and subframe 3 is configured with slot format 34 (mostly UL). Although subframes 3 and 4 are shown using slot formats 34 and 28 respectively, any particular subframe can be configured with any of the various available slot formats 0-61. Slot formats 0 and 1 are full DL and full UL, respectively. Other slot formats 2-61 include a mixture of DL, UL, and flexible symbols. The UE is configured with a slot format via the received Slot Format Indicator (SFI) (dynamically configured via DL Control Information (DCI) or semi-statically / statically controlled via Radio Resource Control (RRC) signaling). Note that the following description also applies to the 5G / NR frame structure as TDD.

[0039] Other wireless communication technologies may have different frame structures and / or different channels. A frame (10 ms) can be divided into 10 equal-sized subframes (1 ms). Each subframe may include one or more time slots. Subframes may also include micro-time slots, which may include 7, 4, or 2 symbols. Each time slot may include 7 or 14 symbols, depending on the time slot configuration. For time slot configuration 0, each time slot may include 14 symbols, while for time slot configuration 1, each time slot may include 7 symbols. Symbols on the DL can be Cyclic Prefix (CP) OFDM (CP-OFDM) symbols. Symbols on the UL can be CP-OFDM symbols (for high-throughput scenarios) or Discrete Fourier Transform (DFT) Spread Spectrum OFDM (DFT-s-OFDM) symbols (also known as Single Carrier Frequency Division Multiple Access (SC-FDMA) symbols) (for power-constrained scenarios; limited to single-stream transmission). The number of time slots within a subframe can be based on the time slot configuration and the numbering scheme. For slot configuration 0, different digital schemes μ0 to μ5 allow 1, 2, 4, 8, 16, and 32 slots per subframe, respectively. For slot configuration 1, different digital schemes 0 to μ2 allow 2, 4, and 8 slots per subframe, respectively. Correspondingly, for slot configuration 0 and digital scheme μ, there are 14 symbols / slot and 2... μ Each time slot / subframe. Subcarrier spacing and symbol length / duration are functions of the digital scheme. Subcarrier spacing can be equal to 2. μ *15kHz, where μ is the digital scheme from 0 to 5. Therefore, digital scheme μ = 0 has a subcarrier spacing of 15kHz, and digital scheme μ = 5 has a subcarrier spacing of 480kHz. The symbol length / duration is negatively correlated with the subcarrier spacing. Figure 2A-2D Examples are provided for slot configuration 0 with 14 symbols per slot and digital scheme μ=0 with 1 slot per subframe. The subcarrier spacing is 15 kHz and the symbol duration is approximately 66.7 μs.

[0040] A resource grid can be used to represent frame structure. Each time slot includes a resource block (RB) (also known as a physical RB (PRB)), which 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.

[0041] like Figure 2A As shown, some of the REs carry reference (pilot) signals (RS) for the UE. The RS may include a demodulated RS (DM-RS) for channel estimation at the UE (indicated as R for a specific configuration). x(Where 100x is the port number, but other DM-RS configurations are possible) and Channel State Information Reference Signal (CSI-RS). RS may also include Beam Measurement RS (BRS), Beam Refinement RS (BRRS), and Phase Tracking RS (PT-RS).

[0042] Figure 2B Examples of various DL channels within a subframe of a frame are shown. The Physical Downlink Control Channel (PDCCH) carries the DCI within one or more Control Channel Elements (CCEs), each CCE comprising nine RE Groups (REGs), each REG comprising four consecutive REs within an OFDM symbol. The Primary Synchronization Signal (PSS) may be located within symbol 2 of a specific subframe of the frame. The PSS is used by UE104 to determine subframe / symbol timing and physical layer identity. The Secondary Synchronization Signal (SSS) may be located within symbol 4 of a specific subframe of the frame. The SSS is used by the UE to determine the Physical Layer Cell Identity Group Number and radio frame timing. Based on the Physical Layer Identity and Physical Layer Cell Identity Group Number, the UE can determine the Physical Cell Identifier (PCI). Based on the PCI, the UE can determine the location of the aforementioned DM-RS. The Physical Broadcast Channel (PBCH) (which carries the Master Information Block (MIB)) may logically be grouped with the PSS and SSS to form a Synchronization Signal (SS) / PBCH block. The MIB provides the number of RBs in the system bandwidth and the System Frame Number (SFN). The Physical Downlink Shared Channel (PDSCH) carries user data, broadcast system information (e.g., System Information Block (SIB)) that is not transmitted via the PBCH, and paging messages.

[0043] like Figure 2C As shown, some REs in the RE array carry DM-RS for channel estimation at the base station (indicated as R for a specific configuration, but other DM-RS configurations are possible). The UE can transmit DM-RS for the Physical Uplink Control Channel (PUCCH) and DM-RS for the Physical Uplink Shared Channel (PUSCH). The PUSCH DM-RS can be transmitted in the first one or two symbols preceding the PUSCH. PUCCH DM-RS can be transmitted in different configurations depending on whether a short or long PUCCH is transmitted and depending on the specific PUCCH format used. Although not shown, the UE can transmit a Sounding Reference Signal (SRS). The SRS can be used by the base station for channel quality estimation to enable frequency-dependent scheduling on the UL.

[0044] Figure 2DExamples of various UL channels within a subframe of a frame are shown. PUCCHs can be positioned as indicated in a configuration. PUCCHs carry uplink control information (UCI), such as scheduling requests, channel quality indicators (CQI), precoding matrix indicators (PMI), rank indicators (RI), and HARQ ACK / NACK feedback. PUSCHs carry data and can also be used to carry buffer status reports (BSR), power headroom reports (PHR), and / or UCI.

[0045] Figure 3 This is a block diagram illustrating communication between base station 310 and UE 350 in the access network. In the DL, IP packets from EPC160 can be provided to controller / processor 375. Controller / processor 375 implements Layer 3 and Layer 2 functions. Layer 3 includes the Radio Resource Control (RRC) layer, and Layer 2 includes the Serving Data Adaptation Protocol (SDAP) layer, Packet Data Convergence Protocol (PDCP) layer, Radio Link Control (RLC) layer, and Media Access Control (MAC) layer. The controller / processor 375 provides: RRC layer functions associated with: broadcasting system information (e.g., MIB, SIB), 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 functions associated with: header compression / decompression, security (encryption, decryption, integrity protection, integrity verification), and handover support functions; RLC layer functions associated with: transmission of upper-layer packet data units (PDUs), error correction via ARQ, concatenation, segmentation and reassembly of RLC service data units (SDUs), resegmentation of RLC data PDUs, and reordering of RLC data PDUs; and MAC layer functions associated with: mapping between logical channels and transport channels, multiplexing of MAC SDUs to transport blocks (TBs), demultiplexing of MAC SDUs from TBs, scheduling information reporting, error correction via HARQ, priority handling, and logical channel prioritization.

[0046] Transmit (TX) processor 316 and receive (RX) processor 370 implement Layer 1 functions associated with various signal processing functions. Layer 1 (which includes the physical (PHY) layer) may include error detection on the transport channel, forward error correction (FEC) encoding / decoding of the transport channel, interleaving, rate matching, mapping to the physical channel, modulation / demodulation of the physical channel, and MIMO antenna processing. TX processor 316 processes the mapping to the signal constellation diagram 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 encoded and modulated symbols can then be split into parallel streams. Each stream can then be mapped to OFDM subcarriers, multiplexed with reference signals (e.g., pilots) in the time and / or frequency domains, and subsequently combined using inverse fast Fourier transform (IFFT) to produce a physical channel carrying the time-domain OFDM symbol stream. The OFDM stream is spatially precoded to generate multiple spatial streams. The channel estimate from channel estimator 374 can be used to determine the coding and modulation scheme, as well as for spatial processing. The channel estimate can be derived based on a reference signal transmitted by UE 350 and / or channel condition feedback. Each spatial stream can then be provided to a different antenna 320 via a separate transmitter 318TX. Each transmitter 318TX can use the corresponding spatial stream to modulate an RF carrier for transmission.

[0047] At UE 350, each receiver 354RX receives signals through its respective antenna 352. Each receiver 354RX recovers the information modulated onto the RF carrier and provides this information to the receive (RX) processor 356. The TX processor 368 and RX processor 356 implement Layer 1 functions associated with various signal processing functions. The RX processor 356 can perform spatial processing on this information to recover any spatial stream destined for UE 350. If multiple spatial streams are destined for UE 350, they can be merged into a single OFDM symbol stream by the RX processor 356. The RX processor 356 then uses a Fast Fourier Transform (FFT) to transform the OFDM symbol stream from the time domain to the frequency domain. The frequency domain signal consists of a separate OFDM symbol stream for each subcarrier of the OFDM signal. The symbols and reference signals on each subcarrier are recovered and demodulated by determining the most probable signal constellation points transmitted by base station 310. These soft decisions can be based on channel estimates calculated by channel estimator 358. The soft decision is then decoded and deinterleaved to recover the data and control signals originally transmitted by base station 310 on the physical channel. This data and control signals are then provided to controller / processor 359, which implements layer 3 and layer 2 functions.

[0048] The controller / processor 359 may be associated with a memory 360 that stores program code and data. The memory 360 may be referred to as a computer-readable medium. In the UL, the controller / processor 359 provides demultiplexing, packet reassembly, decryption, header decompression, and control signal processing between transport and logical channels to recover IP packets from the EPC 160. The controller / processor 359 is also responsible for error detection to support HARQ operation using ACK and / or NACK protocols.

[0049] Similar to the functions described in the DL transmission performed in conjunction with base station 310, controller / processor 359 provides: RRC layer functions associated with: system information (e.g., MIB, SIB) capture, RRC connection, and measurement reporting; PDCP layer functions associated with: header compression / decompression, and security (encryption, decryption, integrity protection, integrity verification); RLC layer functions associated with: transmission of upper-layer PDUs, error correction via ARQ, concatenation, segmentation and reassembly of RLC SDUs, resegmentation of RLC data PDUs, and reordering of RLC data PDUs; and MAC layer functions associated with: mapping between logical channels and transport channels, multiplexing of MAC SDUs to TBs, demultiplexing of MAC SDUs from TBs, scheduling information reporting, error correction via HARQ, priority handling, and logical channel prioritization.

[0050] The TX processor 368 can use the channel estimate derived by the channel estimator 358 based on a reference signal or feedback transmitted by the base station 310 to select an appropriate coding and modulation scheme and facilitate spatial processing. The spatial stream generated by the TX processor 368 can be provided to different antennas 352 via a separate transmitter 354TX. Each transmitter 354TX can use the corresponding spatial stream to modulate an RF carrier for transmission.

[0051] At base station 310, UL transmission is processed in a manner similar to that described in conjunction with the receiver function at UE 350. Each receiver 318RX receives signals through its respective antenna 320. Each receiver 318RX recovers the information modulated onto the RF carrier and provides that information to the RX processor 370.

[0052] Controller / processor 375 may be associated with memory 376 storing program code and data. Memory 376 may be referred to as a computer-readable medium. In the UL, controller / processor 375 provides demultiplexing, packet reassembly, decryption, header decompression, and control signal processing between transport and logical channels to recover IP packets from UE 350. IP packets from controller / processor 375 may be provided to EPC 160. Controller / processor 375 is also responsible for error detection to support HARQ operation using ACK and / or NACK protocols. At least one of TX processor 316, RX processor 370, and controller / processor 375 may be configured to perform operations related to... Figure 1 The 198-related aspects. At least one of the TX processor 368, RX processor 356, and controller / processor 359 can be configured to perform actions related to... Figure 1 All aspects related to 199.

[0053] MIMO MAC-CE can support a single component carrier. For example, the TCI state activation / deactivation for a UE-specific PDSCH MAC-CE can be identified by the MAC Protocol Data Unit (PDU) subheader (which supports a serving cell ID corresponding to a component carrier). As another example, the MAC-CE may include beam switching status, TCI status, etc., applied to the component carrier. Therefore, the network can send a separate MAC-CE for each of multiple component carriers. The network can send multiple MAC-CEs to address multiple different carriers. Multiple MAC-CEs may contain redundant information, which can lead to significant overhead and potentially negatively impact network throughput. Beam switching may occur frequently, especially in scenarios where the UE moves from the coverage of one beam to another. Since control information is signaled for each carrier in the MAC-CE, frequent beam switching can increase overhead and negatively impact throughput.

[0054] From a beam management perspective, it may be expected that the UE will receive multiple component carriers in a shared spatial direction. Due to the complexity of beam management and UE antenna structure involved, a shared spatial direction approach can be used in deployment. As presented in this paper, MAC-CE can be provided jointly for multiple component carriers, for example, to reduce duplicate information. The aspects presented in this paper provide new configurations for supporting multiple component carriers.

[0055] Figure 4This diagram illustrates the advantages of the proposed new MAC-CE for multi-carrier configurations. Aspects may also include a new RRC IE for multi-carrier configurations. The MAC-CE can facilitate efficient spatial and beamforming indication for multiple component carriers, for example, using a single MAC-CE. For instance, a single MAC-CE can be applied to multiple different component carriers. Figure 4 As shown, compared to transmitting multiple MAC-CEs, the proposed multi-carrier MIMO MAC-CE can have a reduced payload size, resulting in reduced overhead. Figure 4 As shown, the payload size of a single-carrier MIMO MAC-CE can increase with the number of component carriers. The proposed MAC-CE maintains the same payload size (21 octets) independent of the number of component carriers. MAC-CE can be applied to multiple component carriers, for example, with the same spatial relationships or the same type of CSI-RS resource configuration. For example, for a 4-component carrier TCI state, the payload size for the single-carrier method is approximately 68 octets, while the proposed multi-carrier method has a payload size reduced to 21 octets. This reduction corresponds to an overhead reduction of 69.2%. As another example, for an 8-component carrier TCI state, the payload size for the single-carrier method is approximately 136 octets, while the proposed multi-carrier method reduces the payload size to 21 octets. This reduction corresponds to an overhead reduction of 84.6%.

[0056] MAC-CE can reference multiple component carriers and multiple bandwidth portions (BWPs) within a carrier, for example, using carrier indexes and / or BWP bitmaps.

[0057] Figure 5 This diagram illustrates an example of an enhanced MAC-CE for multi-carrier configuration. In some aspects, base station 502 can configure a multi-carrier MIMO MAC-CE with different Logical Channel ID (LCID) values, as shown at 506. The MIMO MAC-CE may include a carrier bit index for each of the multiple carriers and / or a BWP bitmap associated with the multiple carriers. Base station 502 may send control information including MIMO MAC-CE 510 to UE 504. UE 504 may determine at 514 whether MIMO MAC-CE 510 is applied to multiple carriers. In this way, base station 502 or the network can use the same MAC-CE 510 to address different component carriers. For example, a shared MAC-CE may be sent for multiple component carriers with the same spatial relationship or the same type of CSI-RS or SRS resource configuration or PUCCH spatial relationship indication.

[0058] For example, in an 8-component carrier scenario, 4 component carriers may come from one spatial direction (from one sector of base station 502), and the other 4 component carriers may come from another spatial direction (from an adjacent sector of base station 502). Therefore, two MAC-CEs may be sufficient to indicate the spatial relationship / beam indication for the 8 component carriers. As an example, in the first MAC-CE, for a 32-bit carrier bit index, bits 0-3 of the least significant bit (LSB) (e.g., corresponding to the first carrier C0, the second carrier C1, the third carrier C2, and the fourth carrier C3) can be set to 1, and the remaining most significant bit (MSB) can be set to 0. Therefore, UE 504 can understand that the first MAC-CE applies only to carriers C0 to C3. As another example, in the second MAC-CE, for a 32-bit carrier bit index, bits 4-7 of the LSB (e.g., corresponding to the fifth carrier C4, the sixth carrier C5, the seventh carrier C6, and the eighth carrier C7) can be set to 1, and the remaining MSB can be set to 0. Therefore, UE 504 can understand that the second MAC-CE applies only to carriers C4 to C7.

[0059] For example, in addition to a single-component carrier MAC-CE, a new MIMO multi-carrier MAC-CE with different LCID values ​​can also be used. Therefore, depending on the active component carrier of UE 504, either a single-component carrier MAC-CE or a multi-carrier MAC-CE can be used flexibly. Although the new MIMO multi-carrier MAC-CE can even be used on a single-component carrier, it may not be as efficient as a single-component carrier MAC-CE. When decoding the LCID of the MAC-CE, UE 504 can determine whether the MAC-CE is a single-component carrier MAC-CE or a MIMO multi-carrier MAC-CE. Therefore, UE 504 can apply this configuration to the indicated carrier.

[0060] In some aspects, base station 502 can indicate to the UE at 508 whether spatial synchronization exists for different component carriers. For example, this indication can be included in an RRC IE. In one approach, RRC IE 512 can use a {Yes, No} indication to indicate whether spatial synchronization exists between configured component carriers. This indication can be referred to as a carrier spatial synchronization IE. The carrier spatial synchronization IE can be included in the RRC reconfiguration message along with physical cell group configuration information (e.g., it can be referred to as “PhysicalCellGroupConfig”). As an example, if the carrier spatial synchronization IE indication is “Yes”, the UE can determine that spatial synchronization exists or should be applied to each of the UE’s configured component carriers. Therefore, whenever UE 504 receives a MAC-CE or DCI for one of the component carriers, UE 504 can tune all beams of the configured component carriers to that TCI state, as shown at 516. Thus, the UE can receive a single-carrier MAC-CE and can apply the TCI state in the single-carrier MAC-CE to each of the UE’s configured component carriers. On the other hand, if the carrier space synchronization field indicates "No", then UE 504 can look up a separate MAC-CE or DCI for each component carrier in the component carriers. Therefore, the UE can process the separate MAC-CE or DCI accordingly.

[0061] In another approach, a new RRC IE 512 can be provided, which indicates the set of component carriers for shared spatial synchronization. Therefore, the base station can indicate multiple component carriers for shared spatial synchronization, rather than indicating spatial synchronization for all configured component carriers. The RRC IE can be applied as a "need to be maintained" category. For example, UE 504 can maintain the last received RRC IE whenever such an RRC IE is not available. The RRC IE can indicate an index of the serving cell set, for example, its range could be the spatial synchronization of carriers from (1…maximum number of serving cells). For example, if the maximum number of serving cells is 32, the serving cell index could correspond to {0,1,2,3,...,31}.

[0062] For example, a carrier spatial synchronization {0,1,4,5} RRC IE can indicate that the set of serving cells with serving cell indices 0, 1, 4, and 5 have the same kind of spatial relationship. Therefore, whenever UE 504 receives a MIMO MAC-CE using any of the serving cells from the serving cell set, UE 504 can automatically use the MAC-CE for the other serving cells indicated in the serving cell set, as shown at 518. For the indicated set {0,1,4,5}, if UE 504 receives a MIMO MAC-CE with serving cell index 1, the UE will apply the received configuration to the other serving cells with indices 0, 4, and 5 from the serving cell set. Therefore, the UE will apply configuration (e.g., TCI state) to the other serving cells in the indicated set without receiving additional carrier-specific MAC-CEs for the other serving cells.

[0063] The new RRC IE 512 can be similarly applied to CSI-RS resource configuration, SRS resource configuration, etc. For example, the RRC IE can indicate a set of component carriers sharing the same type of CSI-RS or SRS resource configuration. In one example, CSI-RS configuration synchronization can be indicated for a set of serving cells. The set of serving cells can include an index of any one of (1, 2, 3, ..., maximum number of serving cells). Similar to the example of spatial synchronization, the set {0, 1, 4, 5} can be used to indicate CSI-RS configuration synchronization for the serving cells corresponding to indices 0, 1, 4, and 5. Therefore, when the UE receives CSI-RS configuration for the component carriers corresponding to the serving cells indicated in the set, the UE will also apply CSI-RS configuration to the remaining serving cells indicated in the set. In another example, SRS configuration synchronization can be indicated for a set of serving cells. The set of serving cells can include an index of any one of (1, 2, 3, ..., maximum number of serving cells). Similar to the spatial synchronization example, the set {0,1,3,8} can be used to indicate SRS configuration synchronization for serving cells corresponding to indices 0, 1, 3, and 8. Therefore, if the UE receives CSI-RS configuration for the component carrier corresponding to serving cell index 3, the UE will also apply CSI-RS configuration to the remaining serving cells indicated in the set (e.g., corresponding to serving cell indices 0, 1, and 8). Compared to single-carrier MIMO MAC-CE, RRC IE can help provide more efficient MIMO MAC-CE communication.

[0064] When all component carriers have the same spatial relationship, the proposed multi-carrier MIMO MAC-CE and RRC IE disclosed herein can substantially reduce overhead, for example, by 69% for 4 component carriers and 84.6% for 8 component carriers. The proposed multi-carrier MIMO MAC-CE and / or RRC IE can be used in conjunction with single-carrier MAC-CE. Therefore, the proposed aspects can provide network operators with greater flexibility to select an octet-efficient MAC-CE based on deployment configuration. In this way, the DCI payload for secondary component carriers can be significantly reduced. Since the spatial relationship between component carriers can be transmitted via RRC IE, the TCI indication in the primary component carrier (PCC)-DCI (which has already been indicated to the UE by the RRC IE) can be used to spatially synchronize component carriers without adding redundant TCI information in the secondary component carrier (SCC)-DCI. Similarly, RRC signaling can be used to indicate CSI-RS configuration relationships or SRS configuration relationships for different component carriers, so that the received CSI-RS configuration or SRS configuration can be applied to each component carrier among those indicated to share CSI-RS configuration relationships or SRS configuration relationships.

[0065] Figure 6 This is a flowchart 600 of a wireless communication method. The method can be performed by a UE (e.g., UE 104, 504, 1050; device 702 / 702'; processing system 814, which may include memory 360 and may be the entire device 702 / 702' or components of device 702 / 702', such as TX processor 368, RX processor 356, and / or controller / processor 359) communicating with a base station (e.g., base station 102 / 180, 502, 750). Wireless communication may include 5G / NR and / or LTE communication. For ease of understanding of the techniques and concepts described herein, please refer to... Figure 4-5 The example shown illustrates the method of flowchart 600. Optional aspects are shown in dashed lines. In this method, even in the case of a single MAC-CE, the base station can address different component carriers simultaneously if all component carriers have the same spatial relationship in the downlink or uplink, or have the same type of CSI-RS or SRS resource configuration. This method can reduce overhead when multiple component carriers have the same spatial relationship, CSI-RS configuration relationship, and / or SRS configuration relationship. The proposed method can provide network operators with greater flexibility to select either an octet-efficient MAC-CE or an RRC IE based on the deployment configuration.

[0066] At 602, the UE can receive configuration for each of the plurality of carriers. For example, 602 can be provided by carrier configuration component 708 via... Figure 7 The receiving component 704 in the device 702 performs the operation.

[0067] At 604, the UE can receive control information in the MAC-CE. The control information may include at least one of, for example, TCI status, CSI-RS resource configuration, or SRS resource configuration or PUCCH spatial relationship indication. For example, 604 can be performed by the control information component 710 via the receiving component 704 of the device 702.

[0068] In some aspects, control information may include a carrier indicator that indicates multiple carriers from a plurality of carriers. For example, the carrier indicator may include a carrier bit index. For example, the least significant bit of the carrier bit index may be used to indicate multiple carriers. For example, returning to reference Figure 5 Base station 502 can send control information, including MIMO MAC-CE 510, to UE 504. UE 504 can determine at 514 whether MIMO MAC-CE 510 is applied to multiple carriers. In this way, even with a single MAC-CE 510, if all component carriers have the same spatial relationship or the same type of CSI-RS resource configuration, base station 502 or the network can address different component carriers simultaneously. For example, in a scenario with eight component carriers, four component carriers may come from one spatial direction (from one sector of base station 502), and the other four component carriers may come from another spatial direction (from an adjacent sector of base station 502). Therefore, two MAC-CEs may be sufficient to indicate the spatial relationship / beam indication for the component carriers.

[0069] In another example, in the first MAC-CE, for a 32-bit carrier bit index, bits 0-3 of the least significant bit (LSB) (e.g., corresponding to the first carrier C0, the second carrier C1, the third carrier C2, and the fourth carrier C3) can be set to 1, and the remaining most significant bit (MSB) can be set to 0. Therefore, the UE can understand that the first MAC-CE applies only to carriers C0 to C3. As another example, in the second MAC-CE, for a 32-bit carrier bit index, bits 4-7 of the LSB (e.g., corresponding to the fifth carrier C4, the sixth carrier C5, the seventh carrier C6, and the eighth carrier C7) can be set to 1, and the remaining MSB can be set to 0. Therefore, the UE can understand that the second MAC-CE applies only to carriers C4 to C7.

[0070] For example, in addition to a single-component carrier MAC-CE, a new MIMO MC MAC-CE with a different LCID value can also be used. Therefore, depending on the UE's active component carrier, either a single-component carrier MAC-CE or an MC MAC-CE can be used flexibly. Although the new MIMO MC MAC-CE can even be used with a single-component carrier, it may not be as efficient as the single-component carrier MAC-CE in terms of octet. When decoding the LCID of the MAC-CE, the UE can determine, for example, at 610, whether the MAC-CE is a single-component carrier MAC-CE or a MIMO MC MAC-CE. Therefore, the UE can continue using the expected configuration of a specific carrier.

[0071] At 606, the UE can receive a synchronization indication from the base station, indicating whether to synchronize with multiple carrier application spaces. For example, 606 can be performed by the indication component 712 via the receiving component 704 of the device 702. For example, returning to reference... Figure 5 Base station 502 can configure a new RRC IE 512 at 508 indicating synchronization of spatial directions for different component carriers. In one approach, the RRC IE 512 for carrier spatial synchronization can indicate {yes, no}. The RRC IE can be included under the physical cell group configuration in the RRC reconfiguration message. For example, if the carrier spatial synchronization IE is indicated as yes, then when UE 504 receives a MAC-CE or DCI for any of the component carriers, UE 504 can apply the MAC-CE or DCI to all configured component carriers. Thus, the UE can tune all carrier beams to the received TCI state, as shown at 516. On the other hand, if the carrier spatial synchronization IE is indicated as no, then UE 504 can, for example, look up a separate MAC-CE or DCI for each component carrier at 614.

[0072] At 608, the UE can receive an indication carrier list from the base station, indicating the set of carriers from a plurality of carriers to which control information in MAC-CE is to be applied. For example, 608 can be from... Figure 7The indication component 712 is executed via the receiving component 704. As an example, the carrier spatial synchronization RRC IE can indicate a set {0,1,4,5} corresponding to a set of serving cells with the same type of spatial relationship, CSI-RS relationship, SRS relationship, or PUCCH spatial relationship indication, whose serving cell indices are 0, 1, 4, and 5. Therefore, when the UE receives a MIMO MAC-CE for any of the serving cells in the serving cell set, the UE can automatically apply the MAC-CE to the other serving cells in the serving cell set, as shown at 612. If the UE receives a MIMO MAC-CE with serving cell index 1, this configuration can be automatically applied to the other serving cells in the serving cell set with indices 0, 4, and 5, without receiving additional carrier-specific MAC-CEs for those serving cells.

[0073] At 610, the UE can determine whether the control information is applied to multiple carriers from a plurality of carriers. For example, 610 can be performed by the determining component 714 of device 702. For example, the UE can use the LSB of the carrier bit index to determine the carriers to which the control information is applied. As another example, the UE can determine whether to apply the control information to multiple carriers from a plurality of carriers based on the synchronization indication received at 606 and / or 608. For example, returning to reference... Figure 5 If the carrier space synchronization IE indication is yes, the UE can apply control information to all configured component carriers at 612. On the other hand, if the carrier space synchronization IE indication is no, the UE 504 can, for example, look up each MAC-CE or DCI at 614 and process each MAC-CE or DCI accordingly. For example, the UE can determine whether to apply control information to a set of carriers from a plurality of carriers based on the synchronization indication received at 608. For example, returning to reference... Figure 5 Whenever the UE receives any MIMO MAC-CE using any of the serving cells in the serving cell set, the UE can automatically use the MAC-CE for other serving cells in the serving cell set, as shown at 612.

[0074] At 612, the UE can apply control information to at least one carrier among a plurality of carriers based on a determination of whether control information is applied to multiple carriers from a plurality of carriers. For example, 612 can be determined by... Figure 7 The application component 716 performs this action. For example, the UE can apply control information to multiple carriers indicated by a carrier indicator. If the UE determines that the control information should not be applied to multiple carriers, the UE can apply the control information to a single carrier at 614.

[0075] For example, control information may include a TCI state, and the UE may apply the TCI state to multiple carriers from a plurality of carriers. As another example, control information may include an SRS resource configuration, and the UE may apply the SRS resource configuration to multiple carriers from a plurality of carriers. As yet another example, control information may include a CSI-RS configuration, and the UE may apply the CSI-RS configuration to multiple carriers from a plurality of carriers.

[0076] Figure 7 This is a conceptual data flow diagram 700 illustrating the data flow between different units / components in example device 702. The device may be a UE or a component of a UE (e.g., UE 104, 504, 1050; device 702 / 702'; processing system 814, which may include memory 360 and may be the entire device 702 / 702' or a component of device 702 / 702', such as TX processor 368, RX processor 356, and / or controller / processor 359). The device includes a carrier configuration component 708 configured to receive configurations for each of a plurality of carriers via a receiving component 704, for example, as in combination... Figure 6 As described in section 602. The device includes a control information component 710 configured to receive control information from the MAC-CE via a receiving component 704, for example, as in conjunction with Figure 6 As described in section 604. Control information may include at least one of, for example, TCI status, CSI-RS resource configuration, or SRS resource configuration or PUCCH spatial relationship indication. The apparatus includes an indication component 712 configured to receive, via a receiving component 704, a synchronization indication indicating whether spatial synchronization is applied to a plurality of carriers (e.g., as in conjunction with...). Figure 6 (as described in 606) or receive from the base station a synchronization indication (e.g., as in combination with) a set of carriers from a plurality of carriers to which spatial synchronization is to be applied. Figure 6 (As described in 608). The synchronization component can receive a carrier list indicating the set of carriers for which control information in the MAC-CE is to be applied for the UE. The apparatus includes a determining component 714 configured to determine whether the control information is applied to multiple carriers from a plurality of carriers, for example, as in combination. Figure 6 As described in 610. The device includes an application component 716 configured to apply control information to at least one carrier among a plurality of carriers based on a determination of whether control information is applied to a plurality of carriers from a plurality of carriers, for example, as in combination with Figure 6 As described in 612. The device also includes a transmitting component 706.

[0077] The device may include the ability to perform the above-described actions. Figure 5-6The flowchart shows the algorithm's additional components in each box. Therefore, the above can be performed by these components. Figure 5-6 Each box in the flowchart, and the apparatus may include one or more of those components. A component may be one or more hardware components specifically configured to perform the process / algorithm, implemented by a processor configured to perform the process / algorithm, stored in a computer-readable medium for implementation by a processor, or some combination thereof.

[0078] Figure 8 Figure 800 illustrates an example of a hardware implementation of a device 702' employing processing system 814. Processing system 814 can be implemented using a bus architecture (typically represented by bus 824). Bus 824 can include any number of interconnect buses and bridges, depending on the specific application and overall design constraints of processing system 814. Bus 824 connects various circuits including one or more processors and / or hardware components (represented by processor 804, components 704, 706, 708, 710, 712, 714, 716, and computer-readable medium / memory 806). Bus 824 can also connect various other circuits such as timing sources, peripherals, voltage regulators, and power management circuitry, which are well known in the art and therefore will not be described further.

[0079] Processing system 814 may be coupled to transceiver 810. Transceiver 810 is coupled to one or more antennas 820. Transceiver 810 provides a means for communicating with various other devices over a transmission medium. Transceiver 810 receives signals from one or more antennas 820, extracts information from the received signals, and provides the extracted information to processing system 814 (specifically, receiving component 704). Additionally, transceiver 810 receives information from processing system 814 (specifically, transmitting component 706) and generates signals to be applied to one or more antennas 820 based on the received information. Processing system 814 includes processor 804 coupled to computer-readable medium / memory 806. Processor 804 is responsible for general processing, including the execution of software stored on computer-readable medium / memory 806. When executed by processor 804, the software causes processing system 814 to perform the various functions described above for any particular device. Computer-readable medium / memory 806 may also be used to store data manipulated by processor 804 during software execution. Processing system 814 also includes at least one of components 704, 706, 708, 710, 712, 714, and 716. A component may be a software component running in processor 804, located in / stored in computer-readable medium / memory 806, one or more hardware components coupled to processor 804, or some combination thereof. Processing system 814 may be a component of UE 350 and may include at least one of TX processor 368, RX processor 356, and controller / processor 359 and / or memory 360. Alternatively, processing system 814 may be the entire UE (e.g., see...). Figure 3 (of 350).

[0080] In one configuration, the apparatus 702 / 702' for wireless communication includes: a unit for receiving configuration for each of a plurality of carriers. The apparatus may include: a unit for receiving control information, the control information including at least one of TCI status, CSI-RS resource configuration, or SRS resource configuration, or PUCCH spatial relationship indication. The apparatus may include: a unit for determining whether the control information is applied to multiple carriers from the plurality of carriers. The apparatus may include: a unit for applying the control information to at least one carrier from the plurality of carriers based on the determination regarding whether the control information is applied to multiple carriers from the plurality of carriers. In one configuration, the apparatus 702 / 702' may include: a unit for receiving from a base station a synchronization indication indicating whether spatial synchronization is applied to the plurality of carriers, wherein the UE determines whether to apply the control information to multiple carriers from the plurality of carriers based on the synchronization indication. In one configuration, apparatus 702 / 702' may include: a unit for receiving from a base station a synchronization indication from a set of carriers from a plurality of carriers to which spatial synchronization is to be applied, wherein the UE determines, based on the synchronization indication, whether to apply control information to the set of carriers from the plurality of carriers.

[0081] The aforementioned units may be one or more of the components described above in device 702 and / or a processing system 814 of device 702' configured to perform the functions described above. As described above, the processing system 814 may include a TX processor 368, an RX processor 356, and a controller / processor 359. Therefore, in one configuration, the aforementioned units may be the TX processor 368, the RX processor 356, and the controller / processor 359 configured to perform the functions described above.

[0082] Figure 9 This is a flowchart 900 of a wireless communication method. The method can be executed by a base station (e.g., base station 102 / 180, 502, 750; device 1002 / 1002'; processing system 1114, which may include memory 376 and may be the entire device 1002 / 1002' or components of device 1002 / 1002', such as TX processor 316, RX processor 370, and / or controller / processor 375) communicating with a UE (e.g., UE 104, 504, 1050). Wireless communication may include 5G / NR and / or LTE communication. For ease of understanding of the techniques and concepts described herein, please refer to... Figure 4-5The example shown in flowchart 900 illustrates the method. Optional aspects are indicated by dashed lines. If all component carriers have the same spatial relationship, CSI-RS resource configuration relationship, or SRS configuration relationship or PUCCH spatial relationship indication, aspects of this method can enable the base station to address different component carriers using a single MAC-CE. This method can reduce overhead when multiple component carriers have the same spatial relationship, CSI-RS resource configuration relationship, or SRS configuration relationship or PUCCH spatial relationship indication. This method can provide network operators with greater flexibility to select either an octet-efficient MAC-CE or an RRC IE based on the deployment configuration.

[0083] At position 902, the base station can configure the UE for use on multiple carriers. For example, position 902 can be configured by a carrier from... Figure 10 The carrier configuration component 1008 is executed via the transmission component 1006.

[0084] At position 904, the base station can transmit control information in the MAC-CE. This control information may include at least one of the following: the UE's TCI state, CSI-RS resource configuration, SRS resource configuration, or PUCCH spatial relationship indication. For example, position 904 may be transmitted from... Figure 10 The control information component 1010 is executed via the sending component 1006.

[0085] In some aspects, control information may include a carrier indicator that indicates multiple carriers from a plurality of carriers. For example, the carrier indicator may include a carrier bit index. For example, the least significant bit of the carrier bit index may be used to indicate multiple carriers. For example, returning to reference Figure 5 Base station 502 can send control information, including MIMO MAC-CE 510, to UE 504. UE 504 can determine at 514 whether MIMO MAC-CE 510 is applied to multiple carriers. In this way, even with a single MAC-CE 510, if all component carriers have the same spatial relationship or the same type of CSI-RS resource configuration, base station 502 or the network can address different component carriers simultaneously. For example, in a scenario with eight component carriers, four component carriers may come from one spatial direction (from one sector of base station 502), and the other four component carriers may come from another spatial direction (from an adjacent sector of base station 502). Therefore, two MAC-CEs may be sufficient to indicate the spatial relationship / beam indication for the component carriers.

[0086] In another example, in the first MAC-CE, for a 32-bit carrier bit index, bits 0-3 of the least significant bit (LSB) (e.g., corresponding to the first carrier C0, the second carrier C1, the third carrier C2, and the fourth carrier C3) can be set to 1, and the remaining most significant bit (MSB) can be set to 0. Therefore, the UE can understand that the first MAC-CE applies only to carriers C0 to C3. As another example, in the second MAC-CE, for a 32-bit carrier bit index, bits 4-7 of the LSB (e.g., corresponding to the fifth carrier C4, the sixth carrier C5, the seventh carrier C6, and the eighth carrier C7) can be set to 1, and the remaining MSB can be set to 0. Therefore, the UE can understand that the second MAC-CE applies only to carriers C4 to C7.

[0087] For example, in addition to a single-component carrier MAC-CE, a new MIMO MC MAC-CE with a different LCID value can also be used. Therefore, depending on the UE's active component carrier, either a single-component carrier MAC-CE or an MC MAC-CE can be used flexibly. Although the new MIMO MC MAC-CE can even be used with a single-component carrier, it may not be as efficient as the single-component carrier MAC-CE in terms of octet. When decoding the LCID of the MAC-CE, the UE can determine, for example, at 610, whether the MAC-CE is a single-component carrier MAC-CE or a MIMO MC MAC-CE. Therefore, the UE can continue using the expected configuration of a specific carrier.

[0088] At 906, the base station can provide the UE with an indication of which control information will be applied to multiple carriers out of a plurality of carriers. For example, 904 can be provided by... Figure 10 The instruction component 1012 performs this action. In some examples, the base station may provide a carrier list, which indicates the set of carriers from a plurality of carriers used by the UE to which control information in the MAC-CE is to be applied.

[0089] In some aspects, the indication may include a carrier indicator included in the MAC-CE, which indicates multiple carriers from a plurality of carriers. For example, the carrier indicator may include a carrier bit index.

[0090] In some aspects, the indication may include a synchronization indication that indicates whether spatial synchronization is applied to each of a plurality of carriers. For example, returning to reference Figure 5Base station 502 can configure a new RRC IE 512 at 508 indicating synchronization of spatial directions for different component carriers. In one approach, the RRC IE 512 for carrier spatial synchronization can indicate {yes, no}. The RRC IE can be included under the physical cell group configuration in the RRC reconfiguration message. For example, if the carrier spatial synchronization IE is indicated as yes, then when UE 504 receives a MAC-CE or DCI for any of the component carriers, UE 504 can apply the MAC-CE or DCI to all configured component carriers. Thus, the UE can tune all carrier beams to the received TCI state, as shown at 516. On the other hand, if the carrier spatial synchronization IE is indicated as no, then UE 504 can, for example, look up a separate MAC-CE or DCI for each component carrier at 614.

[0091] In some aspects, the indication may include a synchronization indication indicating the set of carriers from a plurality of carriers to which spatial synchronization is to be applied. As an example, the carrier spatial synchronization RRC IE may indicate the set {0,1,4,5} corresponding to the set of serving cells with the same type of spatial relationship, CSI-RS relationship, SRS relationship, or PUCCH spatial relationship indication, whose serving cell indices are 0, 1, 4, 5. Therefore, when the UE receives a MIMO MAC-CE for any of the serving cells from the serving cell set, the UE may automatically apply the MAC-CE to the other serving cells in the serving cell set, as shown at 612. If the UE receives a MIMO MAC-CE with serving cell index 1, this configuration may be automatically applied to the other serving cells from the serving cell set with indices 0, 4, 5, without receiving additional carrier-specific MAC-CEs for those serving cells.

[0092] For example, the UE can apply control information to multiple carriers indicated by a carrier indicator. If the UE determines that the control information should not be applied to multiple carriers, the UE can apply the control information to a single carrier at 614. For example, the control information may include a TCI state, and the UE can apply the TCI state to multiple carriers from a plurality of carriers. As another example, the control information may include an SRS resource configuration, and the UE can apply the SRS resource configuration to multiple carriers from a plurality of carriers. As another example, the control information may include a CSI-RS configuration, and the UE can apply the CSI-RS configuration to multiple carriers from a plurality of carriers.

[0093] Figure 10This is a conceptual data flow diagram 1000 illustrating the data flow between different units / components in an exemplary device 1002. The device may be a base station (e.g., base station 102 / 180, 502, 750; device 1002 / 1002'; processing system 1114, which may include memory 376 and may be the entire device 1002 / 1002' or a component of device 1002 / 1002', such as TX processor 316, RX processor 370, and / or controller / processor 375). The device includes a receiving component 1004. The device includes a carrier configuration component 1008 configured to configure the UE for a plurality of carriers, for example, as in combination... Figure 9 As described in 902. The device includes a control information component 1010 configured to send control information to the UE in the MAC-CE, for example, as in conjunction with Figure 9 As described in 904. The control information may include at least one of TCI status, CSI-RS resource configuration, or SRS resource configuration or PUCCH spatial relationship indication. The apparatus includes an indication component 1012 configured to provide the UE with an indication of how the control information will be applied to multiple carriers among a plurality of carriers, for example, as in combination with... Figure 9 As described in 906.

[0094] The device may include the ability to perform the above-described actions. Figure 5 and 9 The flowchart shows the algorithm's additional components in each box. Therefore, the above can be performed by these components. Figure 5 and 9 Each box in the flowchart, and the apparatus may include one or more of those components. A component may be one or more hardware components specifically configured to perform the process / algorithm, implemented by a processor configured to perform the process / algorithm, stored in a computer-readable medium for implementation by a processor, or some combination thereof.

[0095] Figure 11Figure 1100 illustrates an example of a hardware implementation of a device 1002' employing processing system 1114. Processing system 1114 can be implemented using a bus architecture (typically represented by bus 1124). Bus 1124 may include any number of interconnect buses and bridges, depending on the specific application and overall design constraints of processing system 1114. Bus 1124 connects various circuits including one or more processors and / or hardware components (represented by processor 1104, components 1004, 1006, 1008, 1010, 1012, and computer-readable medium / memory 1106). Bus 1124 may also connect various other circuits such as timing sources, peripherals, voltage regulators, and power management circuitry, which are well known in the art and therefore will not be described further.

[0096] Processing system 1114 may be coupled to transceiver 1110. Transceiver 1110 is coupled to one or more antennas 1120. Transceiver 1110 provides a means for communicating with various other devices over a transmission medium. Transceiver 1110 receives signals from one or more antennas 1120, extracts information from the received signals, and provides the extracted information to processing system 1114 (specifically, receiving component 1004). Additionally, transceiver 1110 receives information from processing system 1114 (specifically, transmitting component 1006) and generates signals to be applied to one or more antennas 1120 based on the received information. Processing system 1114 includes processor 1104 coupled to computer-readable medium / memory 1106. Processor 1104 is responsible for general processing, including the execution of software stored on computer-readable medium / memory 1106. When executed by processor 1104, the software causes processing system 1114 to perform the various functions described above for any particular device. The computer-readable medium / memory 1106 can also be used to store data manipulated by the processor 1104 when executing software. The processing system 1114 also includes at least one of components 1004, 1006, 1008, 1010, and 1012. A component may be a software component running in the processor 1104 and located / stored in the computer-readable medium / memory 1106, one or more hardware components coupled to the processor 1104, or some combination thereof. The processing system 1114 may be a component of the base station 310 and may include at least one of the TX processor 316, the RX processor 370, and the controller / processor 375 and / or memory 376. Alternatively, the processing system 1114 may be the entire base station (e.g., see...). Figure 3 (310).

[0097] In one configuration, the apparatus 1002 / 1002' for wireless communication includes: a unit for configuring a UE for a plurality of carriers. The apparatus may include: a unit for transmitting control information to the UE, wherein the control information includes at least one of TCI state, CSI-RS resource configuration, or SRS resource configuration. The apparatus may include: a unit for providing the UE with an indication that the control information will be applied to multiple carriers among the plurality of carriers. The aforementioned unit may be one or more of the components described above in the apparatus 1002 and / or a processing system 1114 of the apparatus 1002' configured to perform the functions described above. As described above, the processing system 1114 may include a TX processor 316, an RX processor 370, and a controller / processor 375. Therefore, in one configuration, the aforementioned unit may be the TX processor 316, the RX processor 370, and the controller / processor 375 configured to perform the functions described above.

[0098] It should be understood that the specific order or hierarchy of the boxes in the disclosed process / flowcharts is merely illustrative of the example method. It should be understood that the specific order or hierarchy of the boxes in the process / flowcharts may be rearranged based on design preferences. Furthermore, some boxes may be combined or omitted. The appended method claims present the elements of each box in a sample order, but this does not imply limitation to the given specific order or hierarchy.

[0099] The following examples are merely illustrative, and their aspects may be combined with, but are not limited to, other examples or aspects of the teachings described herein.

[0100] Example 1 is a method for wireless communication at a UE, comprising: receiving configuration for each of a plurality of carriers; receiving control information included in a MAC-CE; determining whether the control information is applied to a plurality of carriers from the plurality of carriers; and applying the control information to at least one of the plurality of carriers based on the determination of whether the control information is applied to a plurality of carriers from the plurality of carriers.

[0101] In Example 2, the method of Example 1 further includes: the control information includes at least one of TCI status, CSI-RS resource configuration, SRS resource configuration, or PUCCH spatial relationship indication.

[0102] In Example 3, the method of Example 1 or Example 2 further includes: the control information includes a carrier indicator indicating multiple carriers from the plurality of carriers, and wherein the UE applies the control information to the plurality of carriers indicated by the carrier indicator.

[0103] In Example 4, the method of any one of Examples 1-3 further includes: the carrier indicator includes a carrier bit index.

[0104] In Example 5, the method of any one of Examples 1-4 further includes: the plurality of carriers are indicated using the least significant bit of the carrier bit index.

[0105] In Example 6, the method of any one of Examples 1-5 further includes: receiving a component carrier list from a base station, the component carrier list indicating a set of carriers from the plurality of carriers to which the control information in the MAC-CE is to be applied, wherein the UE determines whether to apply the control information to the set of carriers from the plurality of carriers based on the synchronization indication.

[0106] In Example 7, the method of any one of Examples 1-6 further includes: the synchronization indication includes a serving cell index for each carrier in the carrier set.

[0107] In Example 8, the method of any one of Examples 1-7 further includes: the synchronization indication is received in an RRC message.

[0108] In Example 9, the method of any one of Examples 1-8 further includes: the synchronization indication being included in the IE of the RRC message.

[0109] In Example 10, the method of any one of Examples 1-9 further includes: the control information includes the TCI state, and wherein the UE applies the TCI state to a plurality of carriers from the plurality of carriers.

[0110] In Example 11, the method of any one of Examples 1-10 further includes: the control information includes the CSI-RS resource configuration, and wherein the UE applies the TCI state to multiple carriers from the plurality of carriers.

[0111] In Example 12, the method of any one of Examples 1-11 further includes: the control information includes the SRS resource configuration, and wherein the UE applies the TCI state to multiple carriers from the plurality of carriers.

[0112] In Example 13, the method of any one of Examples 1-12 further includes: receiving from a base station a synchronization indication indicating whether to apply control information in the MAC-CE to the plurality of carriers, wherein the UE determines whether to apply the control information to a plurality of carriers from the plurality of carriers based on the synchronization indication.

[0113] In Example 14, the method of any one of Examples 1-13 further includes: when the synchronization indication indicates the application of the spatial synchronization, the UE applies the control information to each of the plurality of carriers.

[0114] In Example 15, the method of any one of Examples 1-14 further includes: when the synchronization indication indicates that the spatial synchronization is not applied, the UE applies the control information to a single carrier from the plurality of carriers.

[0115] In Example 16, the method of any one of Examples 1-15 further includes: the synchronization indication is received in an RRC message.

[0116] In Example 17, the method of any one of Examples 1-16 further includes: the synchronization indication being included in the IE of the RRC message.

[0117] Example 18 is a device including one or more processors and one or more memories storing instructions that are in electronic communication with the one or more processors, the instructions being executable by the one or more processors to cause the device to implement the method of any one of Examples 1-17.

[0118] Example 19 is a system or apparatus including units for implementing the method of any one of Examples 1-17 or the apparatus of any one of Examples 1-17.

[0119] Example 20 is a non-transitory computer-readable medium storing instructions that can be executed by one or more processors to cause the one or more processors to implement the method of any one of Examples 1-17.

[0120] Example 21 is a method for wireless communication at a base station, comprising: configuring a UE for a plurality of carriers; sending control information to the UE in a MAC-CE; and providing the UE with an indication that the control information will be applied to a plurality of carriers among the plurality of carriers.

[0121] In Example 22, the method of Example 21 further includes: the control information includes at least one of TCI status, CSI-RS resource configuration, SRS resource configuration, or PUCCH spatial relationship indication.

[0122] In Example 23, the method of Example 21 or Example 22 further includes: the indication includes a carrier indicator included in the MAC-CE, the carrier indicator indicating the plurality of carriers from the plurality of carriers.

[0123] In Example 24, the method of any one of Examples 21-23 further includes: the carrier indicator includes a carrier bit index.

[0124] In Example 25, the method of any one of Examples 21-24 further includes: the plurality of carriers being indicated using the least significant bit of the carrier bit index.

[0125] In Example 26, the method of any one of Examples 21-25 further includes: the indication includes a component carrier list indicating a set of carriers from the plurality of carriers to which the control information in the MAC-CE is to be applied.

[0126] In Example 27, the method of any one of Examples 21-26 further includes: the synchronization indication is sent in a Radio Resource Control (RRC) message.

[0127] In Example 28, the method of any one of Examples 21-27 further includes: the synchronization indication being included in the information element (IE) of the RRC message.

[0128] In Example 29, the method of any one of Examples 21-28 further includes: the indication includes a synchronization indication indicating a set of carriers from the plurality of carriers to which spatial synchronization is to be applied.

[0129] In Example 30, the method of any one of Examples 21-29 further includes: the synchronization indication includes a serving cell index for each carrier in the carrier set.

[0130] In Example 31, the method of any one of Examples 21-30 further includes: the synchronization indication is sent in a Radio Resource Control (RRC) message.

[0131] In Example 32, the method of any one of Examples 21-31 further includes: the synchronization indication being included in the information element (IE) of the RRC message.

[0132] In Example 33, the method of any one of Examples 21-32 further includes: the control information includes the TCI state.

[0133] In Example 34, the method of any one of Examples 21-33 further includes: the control information includes the CSI-RS resource configuration.

[0134] In Example 35, the method of any one of Examples 21-34 further includes: the control information includes the SRS resource configuration.

[0135] Example 36 is a device including one or more processors and one or more memories storing instructions that are in electronic communication with the one or more processors, the instructions being executable by the one or more processors to cause the device to implement the method of any one of Examples 21-35.

[0136] Example 37 is a system or apparatus including units for implementing the method of any one of Examples 21-35 or the apparatus of any one of Examples 21-35.

[0137] Example 38 is a non-transitory computer-readable medium storing instructions that can be executed by one or more processors to cause the one or more processors to implement the method of any one of Examples 21-35.

[0138] The foregoing description is provided to enable any person skilled in the art to implement the various aspects described herein. Various modifications to these aspects will be apparent to those skilled in the art, and the general principles defined herein may be applied to other aspects. Therefore, this claim is not intended to be limited to the aspects shown herein, but rather to be consistent with the full scope expressed in the claims, wherein, unless expressly stated otherwise, reference to the singular form is not intended to mean “one and only one,” but rather “one or more.” The word “exemplary” as used herein means “as an example, instance, or illustration.” Any aspect described herein as “exemplary” is not necessarily to be construed as preferred over or superior to other aspects. Unless expressly 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" can be A only, B only, C only, A and B, A and C, B and C, or A and B and C, wherein any such combination may contain one or more members of A, B, or C. All structural and functional equivalents of the elements pervading the various aspects described in this disclosure, known to or to be known later by one of ordinary skill in the art, are expressly incorporated herein by reference and are intended to be included by the claims. Furthermore, nothing in the disclosure herein is intended to be offered to the public, whether or not such disclosure is expressly stated in the claims. The terms "module," "mechanism," "element," "device," etc., may not be a substitute for the term "unit." Therefore, no claim element is to be interpreted as a functional unit unless the element is expressly stated using the phrase "unit for..."

Claims

1. A method for wireless communication at a user equipment (UE), comprising: Radio Resource Control (RRC) configuration for the serving cell set; The receiver receives a Medium Access Control-Control Element (MAC-CE), which indicates at least one of a Transmission Configuration Indication (TCI) state or spatial relationship, and further indicates a cell index of a single serving cell in the set of serving cells indicated in the RRC configuration; and Based on the cell index in the MAC-CE, the TCI state or spatial relationship indicated in the MAC-CE is applied to each serving cell in the serving cell set included in the RRC configuration for a single serving cell.

2. The method according to claim 1, wherein, The MAC-CE further indicates at least one of the Channel State Information Reference Signal (CSI-RS) resource configuration or the Sounding Reference Signal (SRS) resource configuration for the serving cell set.

3. The method according to claim 1, wherein, The MAC-CE indicates the spatial relationship for uplink transmission, and wherein the spatial relationship is applied to each serving cell in the serving cell set based on the cell index in the MAC-CE corresponding to one of the serving cell sets configured in the RRC configuration.

4. The method according to claim 1, wherein, The application of the TCI state or spatial relationship indicated in the MAC-CE includes applying the TCI state for reception of the Physical Downlink Shared Channel (PDSCH).

5. The method according to claim 1, wherein, The application of the TCI state or spatial relationship indicated in the MAC-CE includes applying the spatial relationship for the transmission of uplink communication.

6. The method according to claim 1, wherein, The RRC configuration is used to automatically apply the TCI state or the spatial relationship to the other serving cells indicated in the serving cell set when a MAC-CE indicating one of the serving cells in the serving cell set is received, but no additional indications for other serving cells in the MAC-CE are received.

7. The method according to claim 1, wherein, The RRC configuration indicates the set of serving cells in a list, which includes a serving cell index for each serving cell in the set of serving cells.

8. The method according to claim 7, wherein, The list is included in the information element (IE) of the cell group configuration in the RRC message.

9. The method according to claim 1, wherein, The MAC-CE indicates the TCI status, and wherein the TCI status is applied to each serving cell in the serving cell set configured in the RRC configuration based on the cell index in the MAC-CE corresponding to a serving cell in the serving cell set.

10. The method according to claim 1, wherein, The MAC-CE further includes a Channel State Information Reference Signal (CSI-RS) resource configuration, wherein the CSI-RS resource configuration is applied to each serving cell in the set of serving cells.

11. The method according to claim 1, wherein, The MAC-CE further includes a sounding reference signal (SRS) resource configuration, wherein the SRS resource configuration is applied to each serving cell in the set of serving cells.

12. The method according to claim 1, wherein, The RRC configuration indication applies to the set of serving cells for which at least one of the TCI state or the spatial relationship indicated by the MAC-CE is applied.

13. A method for wireless communication at a base station, comprising: Configure the user equipment (UE) using the radio resource control (RRC) configuration of the serving cell set; A Media Access Control-Control Element (MAC-CE) is transmitted, the MAC-CE indicating at least one of a Transmission Configuration Indication (TCI) state or a spatial relationship, and further indicating a cell index of a single serving cell in the serving cell set indicated in the RRC configuration, to switch the TCI state or the spatial relationship for each serving cell in the serving cell set.

14. The method according to claim 13, wherein, The MAC-CE further indicates at least one of the Channel State Information Reference Signal (CSI-RS) resource configuration or the Sounding Reference Signal (SRS) resource configuration for the serving cell set.

15. The method according to claim 13, wherein, The RRC configuration indicates the set of serving cells in a list, the list including a serving cell index for each serving cell in the set of serving cells, and wherein the MAC-CE includes a single serving cell index from the set of serving cell indexes indicated in the list, indicating a serving cell.

16. The method according to claim 15, wherein, The list is indicated in the Information Element (IE) of the cell group configuration in the RRC message.

17. The method according to claim 13, wherein, The MAC-CE indicates the TCI status.

18. The method according to claim 13, wherein, The MAC-CE includes a Channel State Information Reference Signal (CSI-RS) resource configuration for the serving cell set configured in the RRC configuration.

19. The method according to claim 13, wherein, The MAC-CE includes a sounding reference signal (SRS) resource configuration for the serving cell set configured in the RRC configuration.

20. The method according to claim 13, wherein, The MAC-CE indicates the spatial relationship.

21. The method according to claim 13, wherein, The RRC configuration is used to automatically apply the TCI state or the spatial relationship to the other serving cells indicated in the serving cell set when a MAC-CE indicating one of the serving cells in the serving cell set is received, but no additional indications for other serving cells in the MAC-CE are received.

22. An apparatus for wireless communication at a user equipment (UE), comprising: A unit for configuring Radio Resource Control (RRC) for receiving a set of serving cells; A unit for receiving a Media Access Control-Control Element (MAC-CE), the MAC-CE indicating at least one of a Transmission Configuration Indication (TCI) state or a spatial relationship, and further indicating a cell index of a single serving cell in the set of serving cells indicated in the RRC configuration; as well as A unit for applying the TCI state or spatial relationship indicated in the MAC-CE to each serving cell in the serving cell set, based on the cell index in the MAC-CE for a single serving cell included in the serving cell set configured in the RRC configuration.

23. The apparatus according to claim 22, wherein, The MAC-CE further indicates at least one of the Channel State Information Reference Signal (CSI-RS) resource configuration or the Sounding Reference Signal (SRS) resource configuration for the serving cell set.

24. The apparatus according to claim 22, wherein, The RRC configuration indicates the set of serving cells in a list, which includes a serving cell index for each serving cell in the set of serving cells.

25. The apparatus according to claim 24, wherein, The list is included in the information element (IE) of the cell group configuration in the RRC message.

26. The apparatus according to claim 22, wherein, The MAC-CE indicates the TCI status, and wherein the TCI status is applied to each serving cell in the serving cell set configured in the RRC configuration based on the cell index in the MAC-CE corresponding to a serving cell in the serving cell set.

27. The apparatus according to claim 22, wherein, The MAC-CE further includes a Channel State Information Reference Signal (CSI-RS) resource configuration, wherein the CSI-RS resource configuration is applied to each serving cell in the set of serving cells.

28. The apparatus according to claim 22, wherein, The MAC-CE further includes a sounding reference signal (SRS) resource configuration, wherein the SRS resource configuration is applied to each serving cell in the set of serving cells.

29. The apparatus according to claim 22, wherein, The MAC-CE indicates the spatial relationship for uplink transmission, and wherein the spatial relationship is applied to each serving cell in the serving cell set based on the cell index in the MAC-CE corresponding to one of the serving cell sets configured in the RRC configuration.

30. The apparatus according to claim 22, wherein, The application of the TCI state or spatial relationship indicated in the MAC-CE includes applying the TCI state for reception of the Physical Downlink Shared Channel (PDSCH).

31. The apparatus according to claim 22, wherein, The application of the TCI state or spatial relationship indicated in the MAC-CE includes applying the spatial relationship for the transmission of uplink communication.

32. The apparatus according to claim 22, wherein, The RRC configuration is used to automatically apply the TCI state or the spatial relationship to the other serving cells indicated in the serving cell set when a MAC-CE indicating one of the serving cells in the serving cell set is received, but no additional indications for other serving cells in the MAC-CE are received.

33. The apparatus according to claim 22, wherein, The RRC configuration indication applies to the set of serving cells for which at least one of the TCI state or the spatial relationship indicated by the MAC-CE is applied.

34. An apparatus for wireless communication at a base station, comprising: A unit for configuring user equipment (UE) using radio resource control (RRC) configuration of a serving cell set; as well as A unit for transmitting a Media Access Control-Control Element (MAC-CE), the MAC-CE indicating at least one of a Transmission Configuration Indication (TCI) state or a spatial relationship, and further indicating a cell index of a single serving cell in the serving cell set indicated in the RRC configuration, to switch the TCI state or the spatial relationship for each serving cell in the serving cell set.

35. The apparatus according to claim 34, wherein, The MAC-CE further indicates at least one of the Channel State Information Reference Signal (CSI-RS) resource configuration or the Sounding Reference Signal (SRS) resource configuration for the serving cell set.

36. The apparatus according to claim 34, wherein, The RRC configuration indicates the set of serving cells in a list, the list including a serving cell index for each serving cell in the set of serving cells, and wherein the MAC-CE includes a single serving cell index from the set of serving cell indexes indicated in the list, indicating a serving cell.

37. The apparatus according to claim 36, wherein, The list is indicated in the Information Element (IE) of the cell group configuration in the RRC message.

38. The apparatus according to claim 34, wherein, The MAC-CE indicates the TCI status.

39. The apparatus according to claim 34, wherein, The MAC-CE includes a Channel State Information Reference Signal (CSI-RS) resource configuration for the serving cell set configured in the RRC configuration.

40. The apparatus according to claim 34, wherein, The MAC-CE includes a sounding reference signal (SRS) resource configuration for the serving cell set configured in the RRC configuration.

41. The apparatus according to claim 34, wherein, The MAC-CE indicates the spatial relationship.

42. The apparatus according to claim 34, wherein, The RRC configuration is used to automatically apply the TCI state or the spatial relationship to the other serving cells indicated in the serving cell set when a MAC-CE indicating one of the serving cells in the serving cell set is received, but no additional indications for other serving cells in the MAC-CE are received.

43. An apparatus for wireless communication at a user equipment (UE), comprising: Memory; as well as At least one processor, coupled to the memory, is configured to: Radio Resource Control (RRC) configuration for the serving cell set; The receiver receives a Medium Access Control-Control Element (MAC-CE), which indicates at least one of a Transmission Configuration Indication (TCI) state or spatial relationship, and further indicates a cell index of a single serving cell in the set of serving cells indicated in the RRC configuration; and Based on the cell index in the MAC-CE, the TCI state or spatial relationship indicated in the MAC-CE is applied to each serving cell in the serving cell set included in the RRC configuration for a single serving cell.

44. The apparatus according to claim 43, wherein, The MAC-CE further indicates at least one of the Channel State Information Reference Signal (CSI-RS) resource configuration or the Sounding Reference Signal (SRS) resource configuration for the serving cell set.

45. The apparatus according to claim 43, wherein, The MAC-CE indicates the TCI status, and wherein the TCI status is applied to each serving cell in the serving cell set configured in the RRC configuration based on the cell index in the MAC-CE corresponding to a serving cell in the serving cell set.

46. ​​The apparatus according to claim 43, wherein, The MAC-CE further includes a Channel State Information Reference Signal (CSI-RS) resource configuration, wherein the CSI-RS resource configuration is applied to each serving cell in the set of serving cells.

47. The apparatus according to claim 43, wherein, The MAC-CE further includes a sounding reference signal (SRS) resource configuration, wherein the SRS resource configuration is applied to each serving cell in the set of serving cells.

48. The apparatus according to claim 43, wherein, The MAC-CE indicates the spatial relationship for uplink transmission, and wherein the spatial relationship is applied to each serving cell in the serving cell set based on the cell index in the MAC-CE corresponding to one of the serving cell sets configured in the RRC configuration.

49. The apparatus according to claim 43, wherein, Applying the TCI state or spatial relationship indicated in the MAC-CE includes using the TCI state for reception of the Physical Downlink Shared Channel (PDSCH).

50. The apparatus according to claim 43, wherein, The application of the TCI state or spatial relationship indicated in the MAC-CE includes using the spatial relationship for uplink communication transmission.

51. The apparatus according to claim 43, wherein, The RRC configuration is used to automatically apply the TCI state or the spatial relationship to the other serving cells indicated in the serving cell set when a MAC-CE indicating one of the serving cells in the serving cell set is received, but no additional indications for other serving cells in the MAC-CE are received.

52. The apparatus according to claim 43, wherein, The RRC configuration indication applies to the set of serving cells for which at least one of the TCI state or the spatial relationship indicated by the MAC-CE is applied.

53. The apparatus according to claim 43, wherein, The RRC configuration indicates the set of serving cells in a list, which includes a serving cell index for each serving cell in the set of serving cells.

54. The apparatus according to claim 53, wherein, The list is included in the information element (IE) of the cell group configuration in the RRC message.

55. An apparatus for wireless communication at a base station, comprising: Memory; as well as At least one processor, coupled to the memory, is configured to: Configure the user equipment (UE) using the radio resource control (RRC) configuration of the serving cell set; as well as A Media Access Control-Control Element (MAC-CE) is transmitted, the MAC-CE indicating at least one of a Transmission Configuration Indication (TCI) state or a spatial relationship, and further indicating a cell index of a single serving cell in the serving cell set indicated in the RRC configuration, to switch the TCI state or the spatial relationship for each serving cell in the serving cell set.

56. The apparatus according to claim 55, wherein, The MAC-CE further indicates at least one of the Channel State Information Reference Signal (CSI-RS) resource configuration or the Sounding Reference Signal (SRS) resource configuration for the serving cell set.

57. The apparatus according to claim 55, wherein, The RRC configuration indicates the set of serving cells in a list, the list including a serving cell index for each serving cell in the set of serving cells, and wherein the MAC-CE includes a single serving cell index from the set of serving cell indexes indicated in the list, indicating a serving cell.

58. The apparatus according to claim 57, wherein, The list is indicated in the Information Element (IE) of the cell group configuration in the RRC message.

59. The apparatus according to claim 55, wherein, The MAC-CE indicates the TCI status.

60. The apparatus according to claim 55, wherein, The MAC-CE includes a Channel State Information Reference Signal (CSI-RS) resource configuration for the serving cell set configured in the RRC configuration.

61. The apparatus according to claim 55, wherein, The MAC-CE includes a sounding reference signal (SRS) resource configuration for the serving cell set configured in the RRC configuration.

62. The apparatus according to claim 55, wherein, The MAC-CE indicates the spatial relationship.

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