WO2022051936A1 - Procédés et appareil pour l'activation d'états tci dl/ul conjoints - Google Patents

Procédés et appareil pour l'activation d'états tci dl/ul conjoints Download PDF

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Publication number
WO2022051936A1
WO2022051936A1 PCT/CN2020/114220 CN2020114220W WO2022051936A1 WO 2022051936 A1 WO2022051936 A1 WO 2022051936A1 CN 2020114220 W CN2020114220 W CN 2020114220W WO 2022051936 A1 WO2022051936 A1 WO 2022051936A1
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WO
WIPO (PCT)
Prior art keywords
tci
joint
tci states
mac
activated
Prior art date
Application number
PCT/CN2020/114220
Other languages
English (en)
Inventor
Yan Zhou
Fang Yuan
Tao Luo
Original Assignee
Qualcomm Incorporated
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Qualcomm Incorporated filed Critical Qualcomm Incorporated
Priority to PCT/CN2020/114220 priority Critical patent/WO2022051936A1/fr
Priority to CN202180054113.8A priority patent/CN116235592A/zh
Priority to US18/018,503 priority patent/US20230291533A1/en
Priority to PCT/CN2021/117102 priority patent/WO2022052935A1/fr
Priority to EP21865989.4A priority patent/EP4211963A1/fr
Publication of WO2022051936A1 publication Critical patent/WO2022051936A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0014—Three-dimensional division
    • H04L5/0023—Time-frequency-space
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0091—Signaling for the administration of the divided path
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/14—Two-way operation using the same type of signal, i.e. duplex
    • H04L5/1469—Two-way operation using the same type of signal, i.e. duplex using time-sharing
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0686—Hybrid systems, i.e. switching and simultaneous transmission
    • H04B7/0695—Hybrid systems, i.e. switching and simultaneous transmission using beam selection
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0003—Two-dimensional division
    • H04L5/0005—Time-frequency
    • H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
    • H04L5/001—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT the frequencies being arranged in component carriers

Definitions

  • the present disclosure relates generally to communication systems, and more particularly, to activation of joint downlink (DL) and uplink (UL) transmission configuration indicator (TCI) states using a media access control (MAC) control element (CE) (MAC-CE) .
  • MAC media access control
  • CE control element
  • Wireless communication systems are widely deployed to provide various telecommunication services such as telephony, video, data, messaging, and broadcasts.
  • Typical wireless communication systems may employ multiple-access technologies capable of supporting communication with multiple users by sharing available system resources. Examples of such multiple-access technologies include code division multiple access (CDMA) systems, time division multiple access (TDMA) systems, frequency division multiple access (FDMA) systems, orthogonal frequency division multiple access (OFDMA) systems, single-carrier frequency division multiple access (SC-FDMA) systems, and time division synchronous code division multiple access (TD-SCDMA) systems.
  • CDMA code division multiple access
  • TDMA time division multiple access
  • FDMA frequency division multiple access
  • OFDMA orthogonal frequency division multiple access
  • SC-FDMA single-carrier frequency division multiple access
  • TD-SCDMA time division synchronous code division multiple access
  • 5G New Radio is part of a continuous mobile broadband evolution promulgated by Third Generation Partnership Project (3GPP) to meet new requirements associated with latency, reliability, security, scalability (e.g., with Internet of Things (IoT) ) , and other requirements.
  • 3GPP Third Generation Partnership Project
  • 5G NR includes services associated with enhanced mobile broadband (eMBB) , massive machine type communications (mMTC) , and ultra-reliable low latency communications (URLLC) .
  • eMBB enhanced mobile broadband
  • mMTC massive machine type communications
  • URLLC ultra-reliable low latency communications
  • Some aspects of 5G NR may be based on the 4G Long Term Evolution (LTE) standard.
  • LTE Long Term Evolution
  • a base station may transmit a MAC-CE to a UE, the MAC-CE activating a subset of configured joint DL and UL TCI states, each activated joint DL and UL TCI state indicating a common beam for communication in DL and UL.
  • the base station may transmit a configuration indicating applicable DL/UL types of resources for activated joint DL/UL TCI states to the UE.
  • the applicable DL/UL types of resources may include one or more of a physical downlink control channel (PDCCH) , a physical downlink shared channel (PDSCH) , a channel state information (CSI) reference signals (RS) (CSI-RS) , or a positioning RS (PRS) for the DL, and one or more of a physical uplink control channel (PUCCH) , a physical uplink shared channel (PUSCH) , sounding reference signals (SRS) , or a physical random access channel (PRACH) for the UL.
  • the configuration may be received through at least one of a radio resource control (RRC) signaling, a MAC-CE, and/or control information (DCI) .
  • the base station may transmit a DCI indicating an index of a TCI codepoint, the index corresponding to one of the activated joint DL and UL TCI states to the UE.
  • RRC radio resource control
  • DCI control information
  • the UE may transmit an acknowledgment to the base station confirming reception of the DCI indicating the TCI state.
  • the base station may transmit an indication of the DL resources and the UL resources for the communication to the UE.
  • the indication may be received through one of the RRC signaling, the MAC-CE, or the DCI.
  • the UE may determine DL resources and UL resources for the communication to which the one activated joint DL and UL TCI state corresponding to the index of the TCI codepoint indicated through the DCI applies.
  • the DL resources and the UL resources for the communication may be determined based on a predefined rule or the indication received.
  • the UE and the base station may communicate with each other through DL and UL based on the activated joint DL and UL TCI states.
  • the one or more aspects comprise the features hereinafter fully described and particularly pointed out in the claims.
  • the following description and the annexed drawings set forth in detail certain illustrative features of the one or more aspects. These features are indicative, however, of but a few of the various ways in which the principles of various aspects may be employed, and this description is intended to include all such aspects and their equivalents.
  • FIG. 1 is a diagram illustrating an example of a wireless communications system and an access network.
  • FIG. 2A is a diagram illustrating an example of a first frame, in accordance with various aspects of the present disclosure.
  • FIG. 2B is a diagram illustrating an example of DL channels within a subframe, in accordance with various aspects of the present disclosure.
  • FIG. 2C is a diagram illustrating an example of a second frame, in accordance with various aspects of the present disclosure.
  • FIG. 2D is a diagram illustrating an example of UL channels within a subframe, in accordance with various aspects of the present disclosure.
  • FIG. 3 is a diagram illustrating an example of a base station and user equipment (UE) in an access network.
  • UE user equipment
  • FIG. 4 is an example of a MAC-CE of wireless communication.
  • FIG. 5 is a call flow diagram of wireless communication.
  • FIG. 6 is a flowchart of a method of wireless communication.
  • FIG. 7 is a diagram illustrating an example of a hardware implementation for an example apparatus.
  • FIG. 8 is a flowchart of a method of wireless communication.
  • FIG. 9 is a diagram illustrating an example of a hardware implementation for an example apparatus.
  • processors include microprocessors, microcontrollers, graphics processing units (GPUs) , central processing units (CPUs) , application processors, digital signal processors (DSPs) , reduced instruction set computing (RISC) processors, systems on a chip (SoC) , baseband processors, field programmable gate arrays (FPGAs) , programmable logic devices (PLDs) , state machines, gated logic, discrete hardware circuits, and other suitable hardware configured to perform the various functionality described throughout this disclosure.
  • processors in the processing system may execute software.
  • Software shall be construed broadly to mean instructions, instruction sets, code, code segments, program code, programs, subprograms, software components, applications, software applications, software packages, routines, subroutines, objects, executables, threads of execution, procedures, functions, etc., whether referred to as software, firmware, middleware, microcode, hardware description language, or otherwise.
  • the functions described may be implemented in hardware, software, or any combination thereof. If implemented in software, the functions may be stored on or encoded as one or more instructions or code on a computer-readable medium.
  • Computer-readable media includes computer storage media. Storage media may be any available media that can be accessed by a computer.
  • such computer-readable media can comprise a random-access memory (RAM) , a read-only memory (ROM) , an electrically erasable programmable ROM (EEPROM) , optical disk storage, magnetic disk storage, other magnetic storage devices, combinations of the aforementioned types of computer-readable media, or any other medium that can be used to store computer executable code in the form of instructions or data structures that can be accessed by a computer.
  • RAM random-access memory
  • ROM read-only memory
  • EEPROM electrically erasable programmable ROM
  • optical disk storage magnetic disk storage
  • magnetic disk storage other magnetic storage devices
  • combinations of the aforementioned types of computer-readable media or any other medium that can be used to store computer executable code in the form of instructions or data structures that can be accessed by a computer.
  • FIG. 1 is a diagram illustrating an example of a wireless communications system and an access network 100.
  • the wireless communications system (also referred to as a wireless wide area network (WWAN) ) includes base stations 102, UEs 104, an Evolved Packet Core (EPC) 160, and another core network 190 (e.g., a 5G Core (5GC) ) .
  • the base stations 102 may include macrocells (high power cellular base station) and/or small cells (low power cellular base station) .
  • the macrocells include base stations.
  • the small cells include femtocells, picocells, and microcells.
  • the base stations 102 configured for 4G LTE may interface with the EPC 160 through first backhaul links 132 (e.g., S1 interface) .
  • the base stations 102 configured for 5G NR may interface with core network 190 through second backhaul links 184.
  • the base stations 102 may perform one or more of the following functions: transfer of user data, radio channel ciphering and deciphering, integrity protection, header compression, mobility control functions (e.g., handover, dual connectivity) , inter-cell interference coordination, connection setup and release, load balancing, distribution for non-access stratum (NAS) messages, NAS node selection, synchronization, radio access network (RAN) sharing, multimedia broadcast multicast service (MBMS) , subscriber and equipment trace, RAN information management (RIM) , paging, positioning, and delivery of warning messages.
  • NAS non-access stratum
  • RAN radio access network
  • MBMS multimedia broadcast multicast service
  • RIM RAN information management
  • the base stations 102 may communicate directly or indirectly (e.g., through the EPC 160 or core network 190) with each other over third backhaul links 134 (e.g., X2 interface) .
  • the first backhaul links 132, the second backhaul links 184, and the third backhaul links 134 may be wired or wireless.
  • the base stations 102 may wirelessly communicate with the UEs 104. Each of the base stations 102 may provide communication coverage for a respective geographic coverage area 110. There may be overlapping geographic coverage areas 110. For example, the small cell 102' may have a coverage area 110' that overlaps the coverage area 110 of one or more macro base stations 102.
  • a network that includes both small cell and macrocells may be known as a heterogeneous network.
  • a heterogeneous network may also include Home Evolved Node Bs (eNBs) (HeNBs) , which may provide service to a restricted group known as a closed subscriber group (CSG) .
  • eNBs Home Evolved Node Bs
  • HeNBs Home Evolved Node Bs
  • CSG closed subscriber group
  • the communication links 120 between the base stations 102 and the UEs 104 may include uplink (UL) (also referred to as reverse link) transmissions from a UE 104 to a base station 102 and/or downlink (DL) (also referred to as forward link) transmissions from a base station 102 to a UE 104.
  • the communication links 120 may use multiple-input and multiple-output (MIMO) antenna technology, including spatial multiplexing, beamforming, and/or transmit diversity.
  • the communication links may be through one or more carriers.
  • the base stations 102 /UEs 104 may use spectrum up to Y MHz (e.g., 5, 10, 15, 20, 100, 400, etc.
  • the component carriers may include a primary component carrier and one or more secondary component carriers.
  • a primary component carrier may be referred to as a primary cell (PCell) and a secondary component carrier may be referred to as a secondary cell (SCell) .
  • D2D communication link 158 may use the DL/UL WWAN spectrum.
  • the D2D communication link 158 may use one or more sidelink channels, such as a physical sidelink broadcast channel (PSBCH) , a physical sidelink discovery channel (PSDCH) , a physical sidelink shared channel (PSSCH) , and a physical sidelink control channel (PSCCH) .
  • sidelink channels such as a physical sidelink broadcast channel (PSBCH) , a physical sidelink discovery channel (PSDCH) , a physical sidelink shared channel (PSSCH) , and a physical sidelink control channel (PSCCH) .
  • sidelink channels such as a physical sidelink broadcast channel (PSBCH) , a physical sidelink discovery channel (PSDCH) , a physical sidelink shared channel (PSSCH) , and a physical sidelink control channel (PSCCH) .
  • D2D communication may be through a variety of wireless D2D communications systems, such as for example, WiMedia, Bluetooth, ZigBe
  • the wireless communications system may further include a Wi-Fi access point (AP) 150 in communication with Wi-Fi stations (STAs) 152 via communication links 154, e.g., in a 5 GHz unlicensed frequency spectrum or the like.
  • AP Wi-Fi access point
  • STAs Wi-Fi stations
  • communication links 154 e.g., in a 5 GHz unlicensed frequency spectrum or the like.
  • the STAs 152 /AP 150 may perform a clear channel assessment (CCA) prior to communicating in order to determine whether the channel is available.
  • CCA clear channel assessment
  • the small cell 102' may operate in a licensed and/or an unlicensed frequency spectrum. When operating in an unlicensed frequency spectrum, the small cell 102' may employ NR and use the same unlicensed frequency spectrum (e.g., 5 GHz, or the like) as used by the Wi-Fi AP 150. The small cell 102', employing NR in an unlicensed frequency spectrum, may boost coverage to and/or increase capacity of the access network.
  • the small cell 102' employing NR in an unlicensed frequency spectrum, may boost coverage to and/or increase capacity of the access network.
  • the electromagnetic spectrum is often subdivided, based on frequency/wavelength, into various classes, bands, channels, etc.
  • two initial operating bands have been identified as frequency range designations FR1 (410 MHz –7.125 GHz) and FR2 (24.25 GHz –52.6 GHz) .
  • the frequencies between FR1 and FR2 are often referred to as mid-band frequencies.
  • FR1 is often referred to (interchangeably) as a “sub-6 GHz” band in various documents and articles.
  • FR2 which is often referred to (interchangeably) as a “millimeter wave” band in documents and articles, despite being different from the extremely high frequency (EHF) band (30 GHz –300 GHz) which is identified by the International Telecommunications Union (ITU) as a “millimeter wave” band.
  • EHF extremely high frequency
  • ITU International Telecommunications Union
  • sub-6 GHz or the like if used herein may broadly represent frequencies that may be less than 6 GHz, may be within FR1, or may include mid-band frequencies.
  • millimeter wave or the like if used herein may broadly represent frequencies that may include mid-band frequencies, may be within FR2, or may be within the EHF band.
  • a base station 102 may include and/or be referred to as an eNB, gNodeB (gNB) , or another type of base station.
  • Some base stations, such as gNB 180 may operate in a traditional sub 6 GHz spectrum, in millimeter wave frequencies, and/or near millimeter wave frequencies in communication with the UE 104.
  • the gNB 180 may be referred to as a millimeter wave base station.
  • the millimeter wave base station 180 may utilize beamforming 182 with the UE 104 to compensate for the path loss and short range.
  • the base station 180 and the UE 104 may each include a plurality of antennas, such as antenna elements, antenna panels, and/or antenna arrays to facilitate the beamforming.
  • the base station 180 may transmit a beamformed signal to the UE 104 in one or more transmit directions 182'.
  • the UE 104 may receive the beamformed signal from the base station 180 in one or more receive directions 182”.
  • the UE 104 may also transmit a beamformed signal to the base station 180 in one or more transmit directions.
  • the base station 180 may receive the beamformed signal from the UE 104 in one or more receive directions.
  • the base station 180 /UE 104 may perform beam training to determine the best receive and transmit directions for each of the base station 180 / UE 104.
  • the transmit and receive directions for the base station 180 may or may not be the same.
  • the transmit and receive directions for the UE 104 may or may not be the same.
  • the EPC 160 may include a Mobility Management Entity (MME) 162, other MMEs 164, a Serving Gateway 166, a Multimedia Broadcast Multicast Service (MBMS) Gateway 168, a Broadcast Multicast Service Center (BM-SC) 170, and a Packet Data Network (PDN) Gateway 172.
  • MME Mobility Management Entity
  • MBMS Multimedia Broadcast Multicast Service
  • BM-SC Broadcast Multicast Service Center
  • PDN Packet Data Network
  • the MME 162 may be in communication with a Home Subscriber Server (HSS) 174.
  • HSS Home Subscriber Server
  • the MME 162 is the control node that processes the signaling between the UEs 104 and the EPC 160.
  • the MME 162 provides bearer and connection management. All user Internet protocol (IP) packets are transferred through the Serving Gateway 166, which itself is connected to the PDN Gateway 172.
  • IP Internet protocol
  • the PDN Gateway 172 provides UE IP address allocation as well as other functions.
  • the PDN Gateway 172 and the BM-SC 170 are connected to the IP Services 176.
  • the IP Services 176 may include the Internet, an intranet, an IP Multimedia Subsystem (IMS) , a PS Streaming Service, and/or other IP services.
  • the BM-SC 170 may provide functions for MBMS user service provisioning and delivery.
  • the BM-SC 170 may serve as an entry point for content provider MBMS transmission, may be used to authorize and initiate MBMS Bearer Services within a public land mobile network (PLMN) , and may be used to schedule MBMS transmissions.
  • PLMN public land mobile network
  • the MBMS Gateway 168 may be used to distribute MBMS traffic to the base stations 102 belonging to a Multicast Broadcast Single Frequency Network (MBSFN) area broadcasting a particular service, and may be responsible for session management (start/stop) and for collecting eMBMS related charging information.
  • MMSFN Multicast Broadcast Single Frequency Network
  • the core network 190 may include a Access and Mobility Management Function (AMF) 192, other AMFs 193, a Session Management Function (SMF) 194, and a User Plane Function (UPF) 195.
  • the AMF 192 may be in communication with a Unified Data Management (UDM) 196.
  • the AMF 192 is the control node that processes the signaling between the UEs 104 and the core network 190.
  • the AMF 192 provides QoS flow and session management. All user Internet protocol (IP) packets are transferred through the UPF 195.
  • the UPF 195 provides UE IP address allocation as well as other functions.
  • the UPF 195 is connected to the IP Services 197.
  • the IP Services 197 may include the Internet, an intranet, an IP Multimedia Subsystem (IMS) , a Packet Switch (PS) Streaming (PSS) Service, and/or other IP services.
  • IMS IP Multimedia Subsystem
  • PS Packet Switch
  • PSS Packe
  • the base station may include and/or be referred to as a gNB, Node B, eNB, an access point, a base transceiver station, a radio base station, a radio transceiver, a transceiver function, a basic service set (BSS) , an extended service set (ESS) , a transmit reception point (TRP) , or some other suitable terminology.
  • the base station 102 provides an access point to the EPC 160 or core network 190 for a UE 104.
  • Examples of UEs 104 include a cellular phone, a smart phone, a session initiation protocol (SIP) phone, a laptop, a personal digital assistant (PDA) , a satellite radio, a global positioning system, a multimedia device, a video device, a digital audio player (e.g., MP3 player) , a camera, a game console, a tablet, a smart device, a wearable device, a vehicle, an electric meter, a gas pump, a large or small kitchen appliance, a healthcare device, an implant, a sensor/actuator, a display, or any other similar functioning device.
  • SIP session initiation protocol
  • PDA personal digital assistant
  • the UEs 104 may be referred to as IoT devices (e.g., parking meter, gas pump, toaster, vehicles, heart monitor, etc. ) .
  • the UE 104 may also be referred to as a station, a mobile station, a subscriber station, a mobile unit, a subscriber unit, a wireless unit, a remote unit, a mobile device, a wireless device, a wireless communications device, a remote device, a mobile subscriber station, an access terminal, a mobile terminal, a wireless terminal, a remote terminal, a handset, a user agent, a mobile client, a client, or some other suitable terminology.
  • the UE 104 may include a joint DL/UL TCI state activation component 198 configured to receive a MAC-CE activating the joint DL/UL TCI states, process the received MAC-CE activating the joint DL/UL TCI states, and communicate with the base station through DL and UL based on the activated joint DL/UL TCI states.
  • the base station 180 may include a joint DL/UL TCI state activation component 199 configured to transmit the MAC- CE activating the joint DL/UL TCI states to the UE, and communicate with the base station through DL and UL based on the activated joint DL/UL TCI states.
  • FIG. 2A is a diagram 200 illustrating an example of a first subframe within a 5G NR frame structure.
  • FIG. 2B is a diagram 230 illustrating an example of DL channels within a 5G NR subframe.
  • FIG. 2C is a diagram 250 illustrating an example of a second subframe within a 5G NR frame structure.
  • FIG. 2D is a diagram 280 illustrating an example of UL channels within a 5G NR subframe.
  • the 5G NR frame structure may be frequency division duplexed (FDD) in which for a particular set of subcarriers (carrier system bandwidth) , subframes within the set of subcarriers are dedicated for either DL or UL, or may be time division duplexed (TDD) in which for a particular set of subcarriers (carrier system bandwidth) , subframes within the set of subcarriers are dedicated for both DL and UL.
  • FDD frequency division duplexed
  • TDD time division duplexed
  • the 5G NR frame structure is assumed to be TDD, with subframe 4 being configured with slot format 28 (with mostly DL) , where D is DL, U is UL, and F is flexible for use between DL/UL, and subframe 3 being configured with slot format 1 (with all UL) . While subframes 3, 4 are shown with slot formats 1, 28, respectively, any particular subframe may be configured with any of the various available slot formats 0-61. Slot formats 0, 1 are all DL, UL, respectively. Other slot formats 2-61 include a mix of DL, UL, and flexible symbols.
  • UEs are configured with the slot format (dynamically through DCI, or semi-statically/statically through radio resource control (RRC) signaling) through a received slot format indicator (SFI) .
  • the slot format dynamically through DCI, or semi-statically/statically through radio resource control (RRC) signaling
  • RRC radio resource control
  • SFI received slot format indicator
  • a frame (10 ms) may be divided into 10 equally sized subframes (1 ms) .
  • Each subframe may include one or more time slots.
  • Subframes may also include mini-slots, which may include 7, 4, or 2 symbols.
  • Each slot may include 7 or 14 symbols, depending on the slot configuration. For slot configuration 0, each slot may include 14 symbols, and for slot configuration 1, each slot may include 7 symbols.
  • the symbols on DL may be cyclic prefix (CP) OFDM (CP-OFDM) symbols.
  • the symbols on UL may be CP-OFDM symbols (for high throughput scenarios) or discrete Fourier transform (DFT) spread OFDM (DFT-s-OFDM) symbols (also referred to as single carrier frequency-division multiple access (SC-FDMA) symbols) (for power limited scenarios; limited to a single stream transmission) .
  • the number of slots within a subframe is based on the slot configuration and the numerology. For slot configuration 0, different numerologies ⁇ 0 to 4 allow for 1, 2, 4, 8, and 16 slots, respectively, per subframe. For slot configuration 1, different numerologies 0 to 2 allow for 2, 4, and 8 slots, respectively, per subframe. Accordingly, for slot configuration 0 and numerology ⁇ , there are 14 symbols/slot and 2 ⁇ slots/subframe.
  • the subcarrier spacing and symbol length/duration are a function of the numerology.
  • the subcarrier spacing may be equal to 2 ⁇ *15 kHz, where ⁇ is the numerology 0 to 4.
  • the symbol length/duration is inversely related to the subcarrier spacing.
  • the slot duration is 0.25 ms
  • the subcarrier spacing is 60 kHz
  • the symbol duration is approximately 16.67 ⁇ s.
  • Each BWP may have a particular numerology.
  • a resource grid may be used to represent the frame structure.
  • Each time slot includes a resource block (RB) (also referred to as physical RBs (PRBs) ) that extends 12 consecutive subcarriers.
  • RB resource block
  • PRBs physical RBs
  • the resource grid is divided into multiple resource elements (REs) . The number of bits carried by each RE depends on the modulation scheme.
  • the RS may include demodulation RS (DM-RS) (indicated as R for one particular configuration, but other DM-RS configurations are possible) and channel state information reference signals (CSI-RS) for channel estimation at the UE.
  • DM-RS demodulation RS
  • CSI-RS channel state information reference signals
  • the RS may also include beam measurement RS (BRS) , beam refinement RS (BRRS) , and phase tracking RS (PT-RS) .
  • BRS beam measurement RS
  • BRRS beam refinement RS
  • PT-RS phase tracking RS
  • FIG. 2B illustrates an example of various DL channels within a subframe of a frame.
  • the physical downlink control channel (PDCCH) carries DCI within one or more control channel elements (CCEs) (e.g., 1, 2, 4, 8, or 16 CCEs) , each CCE including six RE groups (REGs) , each REG including 12 consecutive REs in an OFDM symbol of an RB.
  • CCEs control channel elements
  • REGs RE groups
  • a PDCCH within one BWP may be referred to as a control resource set (CORESET) .
  • CORESET control resource set
  • a UE is configured to monitor PDCCH candidates in a PDCCH search space (e.g., common search space, UE-specific search space) during PDCCH monitoring occasions on the CORESET, where the PDCCH candidates have different DCI formats and different aggregation levels. Additional BWPs may be located at greater and/or lower frequencies across the channel bandwidth.
  • a primary synchronization signal (PSS) may be within symbol 2 of particular subframes of a frame. The PSS is used by a UE 104 to determine subframe/symbol timing and a physical layer identity.
  • a secondary synchronization signal (SSS) may be within symbol 4 of particular subframes of a frame. The SSS is used by a UE to determine a physical layer cell identity group number and radio frame timing.
  • the UE can determine a physical cell identifier (PCI) . Based on the PCI, the UE can determine the locations of the aforementioned DM-RS.
  • the physical broadcast channel (PBCH) which carries a master information block (MIB) , may be logically grouped with the PSS and SSS to form a synchronization signal (SS) /PBCH block (also referred to as SS block (SSB) ) .
  • the MIB provides a number of RBs in the system bandwidth and a system frame number (SFN) .
  • the physical downlink shared channel (PDSCH) carries user data, broadcast system information not transmitted through the PBCH such as system information blocks (SIBs) , and paging messages.
  • SIBs system information blocks
  • some of the REs carry DM-RS (indicated as R for one particular configuration, but other DM-RS configurations are possible) for channel estimation at the base station.
  • the UE may transmit DM-RS for the PUCCH and DM-RS for the PUSCH.
  • the PUSCH DM-RS may be transmitted in the first one or two symbols of the PUSCH.
  • the PUCCH DM-RS may be transmitted in different configurations depending on whether short or long PUCCHs are transmitted and depending on the particular PUCCH format used.
  • the UE may transmit SRS.
  • the SRS may be transmitted in the last symbol of a subframe.
  • the SRS may have a comb structure, and a UE may transmit SRS on one of the combs.
  • the SRS may be used by a base station for channel quality estimation to enable frequency-dependent scheduling on the UL.
  • FIG. 2D illustrates an example of various UL channels within a subframe of a frame.
  • the PUCCH may be located as indicated in one configuration.
  • the PUCCH carries uplink control information (UCI) , such as scheduling requests, a channel quality indicator (CQI) , a precoding matrix indicator (PMI) , a rank indicator (RI) , and hybrid automatic repeat request (HARQ) ACK/NACK feedback.
  • UCI uplink control information
  • the PUSCH carries data, and may additionally be used to carry a buffer status report (BSR) , a power headroom report (PHR) , and/or UCI.
  • BSR buffer status report
  • PHR power headroom report
  • FIG. 3 is a block diagram of a base station 310 in communication with a UE 350 in an access network.
  • IP packets from the EPC 160 may be provided to a controller/processor 375.
  • the controller/processor 375 implements layer 3 and layer 2 functionality.
  • Layer 3 includes a radio resource control (RRC) layer
  • layer 2 includes a service data adaptation protocol (SDAP) layer, a packet data convergence protocol (PDCP) layer, a radio link control (RLC) layer, and a medium access control (MAC) layer.
  • RRC radio resource control
  • SDAP service data adaptation protocol
  • PDCP packet data convergence protocol
  • RLC radio link control
  • MAC medium access control
  • the controller/processor 375 provides RRC layer functionality associated with broadcasting of system information (e.g., MIB, SIBs) , RRC connection control (e.g., RRC connection paging, RRC connection establishment, RRC connection modification, and RRC connection release) , inter radio access technology (RAT) mobility, and measurement configuration for UE measurement reporting; PDCP layer functionality associated with header compression /decompression, security (ciphering, deciphering, integrity protection, integrity verification) , and handover support functions; RLC layer functionality associated with the transfer of upper layer packet data units (PDUs) , error correction through ARQ, concatenation, segmentation, and reassembly of RLC service data units (SDUs) , re-segmentation of RLC data PDUs, and reordering of RLC data PDUs; and MAC layer functionality associated with mapping between logical channels and transport channels, multiplexing of MAC SDUs onto transport blocks (TBs) , demultiplexing of MAC SDU
  • the transmit (TX) processor 316 and the receive (RX) processor 370 implement layer 1 functionality associated with various signal processing functions.
  • Layer 1 which includes a physical (PHY) layer, may include error detection on the transport channels, forward error correction (FEC) coding/decoding of the transport channels, interleaving, rate matching, mapping onto physical channels, modulation/demodulation of physical channels, and MIMO antenna processing.
  • the TX processor 316 handles mapping to signal constellations based on various modulation schemes (e.g., binary phase-shift keying (BPSK) , quadrature phase-shift keying (QPSK) , M-phase-shift keying (M-PSK) , M-quadrature amplitude modulation (M-QAM) ) .
  • BPSK binary phase-shift keying
  • QPSK quadrature phase-shift keying
  • M-PSK M-phase-shift keying
  • M-QAM M-quadrature amplitude modulation
  • the coded and modulated symbols may then be split into parallel streams.
  • Each stream may then be mapped to an OFDM subcarrier, multiplexed with a reference signal (e.g., pilot) in the time and/or frequency domain, and then combined together using an Inverse Fast Fourier Transform (IFFT) to produce a physical channel carrying a time domain OFDM symbol stream.
  • IFFT Inverse Fast Fourier Transform
  • the OFDM stream is spatially precoded to produce multiple spatial streams.
  • Channel estimates from a channel estimator 374 may be used to determine the coding and modulation scheme, as well as for spatial processing.
  • the channel estimate may be derived from a reference signal and/or channel condition feedback transmitted by the UE 350.
  • Each spatial stream may then be provided to a different antenna 320 via a separate transmitter 318 TX.
  • Each transmitter 318 TX may modulate an RF carrier with a respective spatial stream for transmission.
  • each receiver 354 RX receives a signal through its respective antenna 352.
  • Each receiver 354 RX recovers information modulated onto an RF carrier and provides the information to the receive (RX) processor 356.
  • the TX processor 368 and the RX processor 356 implement layer 1 functionality associated with various signal processing functions.
  • the RX processor 356 may perform spatial processing on the information to recover any spatial streams destined for the UE 350. If multiple spatial streams are destined for the UE 350, they may be combined by the RX processor 356 into a single OFDM symbol stream.
  • the RX processor 356 then converts the OFDM symbol stream from the time-domain to the frequency domain using a Fast Fourier Transform (FFT) .
  • FFT Fast Fourier Transform
  • the frequency domain signal comprises a separate OFDM symbol stream for each subcarrier of the OFDM signal.
  • the symbols on each subcarrier, and the reference signal are recovered and demodulated by determining the most likely signal constellation points transmitted by the base station 310. These soft decisions may be based on channel estimates computed by the channel estimator 358.
  • the soft decisions are then decoded and deinterleaved to recover the data and control signals that were originally transmitted by the base station 310 on the physical channel.
  • the data and control signals are then provided to the controller/processor 359, which implements layer 3 and layer 2 functionality.
  • the controller/processor 359 can be associated with a memory 360 that stores program codes and data.
  • the memory 360 may be referred to as a computer-readable medium.
  • the controller/processor 359 provides demultiplexing between transport and logical channels, packet reassembly, deciphering, header decompression, and control signal processing to recover IP packets from the EPC 160.
  • the controller/processor 359 is also responsible for error detection using an ACK and/or NACK protocol to support HARQ operations.
  • the controller/processor 359 provides RRC layer functionality associated with system information (e.g., MIB, SIBs) acquisition, RRC connections, and measurement reporting; PDCP layer functionality associated with header compression /decompression, and security (ciphering, deciphering, integrity protection, integrity verification) ; RLC layer functionality associated with the transfer of upper layer PDUs, error correction through ARQ, concatenation, segmentation, and reassembly of RLC SDUs, re-segmentation of RLC data PDUs, and reordering of RLC data PDUs; and MAC layer functionality associated with mapping between logical channels and transport channels, multiplexing of MAC SDUs onto TBs, demultiplexing of MAC SDUs from TBs, scheduling information reporting, error correction through HARQ, priority handling, and logical channel prioritization.
  • RRC layer functionality associated with system information (e.g., MIB, SIBs) acquisition, RRC connections, and measurement reporting
  • PDCP layer functionality associated with
  • Channel estimates derived by a channel estimator 358 from a reference signal or feedback transmitted by the base station 310 may be used by the TX processor 368 to select the appropriate coding and modulation schemes, and to facilitate spatial processing.
  • the spatial streams generated by the TX processor 368 may be provided to different antenna 352 via separate transmitters 354TX. Each transmitter 354TX may modulate an RF carrier with a respective spatial stream for transmission.
  • the UL transmission is processed at the base station 310 in a manner similar to that described in connection with the receiver function at the UE 350.
  • Each receiver 318RX receives a signal through its respective antenna 320.
  • Each receiver 318RX recovers information modulated onto an RF carrier and provides the information to a RX processor 370.
  • the controller/processor 375 can be associated with a memory 376 that stores program codes and data.
  • the memory 376 may be referred to as a computer-readable medium.
  • the controller/processor 375 provides demultiplexing between transport and logical channels, packet reassembly, deciphering, header decompression, control signal processing to recover IP packets from the UE 350. IP packets from the controller/processor 375 may be provided to the EPC 160.
  • the controller/processor 375 is also responsible for error detection using an ACK and/or NACK protocol to support HARQ operations.
  • At least one of the TX processor 368, the RX processor 356, and the controller/processor 359 may be configured to perform aspects in connection with 198 of FIG. 1.
  • At least one of the TX processor 316, the RX processor 370, and the controller/processor 375 may be configured to perform aspects in connection with 199 of FIG. 1.
  • an enhancement on multi-beam operation mainly targeting frequency range 2 (FR2) while also applicable to frequency range 1 (FR1) .
  • features may be identified and specified to facilitate a more efficient (lower latency and overhead) DL/UL beam management to support higher intra-cell mobility and layer 1 (L1) /layer 2 (L2) -centric inter-cell mobility and/or a larger number of configured TCI states.
  • a common beam for data and control transmission/reception for DL and UL, especially for intra-band carrier aggregation (CA) may be specified in order to provide a unified TCI framework for DL and UL beam indication.
  • Enhancement on signaling mechanisms for the above features to improve latency and efficiency with more usage of dynamic control signaling may be provided. Further, features may be identified and specified to facilitate UL beam selection for UEs equipped with multiple panels, considering UL coverage loss mitigation due to a maximum permissible exposure (MPE) , based on an UL beam indication with the unified TCI framework for an UL fast panel selection.
  • MPE maximum permissible exposure
  • a unified TCI framework for DL and UL beam indication may be beneficial.
  • a major use case may be to signal a common beam for multiple DL and UL resources to save both beam indication and overhead latency.
  • the common beam indication may be signaled via a joint DL/UL TCI state. The activation of the joint DL/UL TCI state using a MAC-CE is described infra.
  • a joint DL/UL TCI state may jointly indicate a common beam or a set of common beams applied commonly to each of multiple DL/UL resources and may include a set of information including the following steps.
  • each of the joint DL/UL TCI states may include a TCI state identification (ID) .
  • the TCI state ID may be in a dedicated ID space for common beam (s) indication, or in a common ID space shared for common DL/UL beam (s) indication, a DL beam indication, and/or an UL beam indication.
  • the joint DL/UL TCI state may include IDs of one or more source reference signals (RSs) , providing at least one DL quasi-co-location (QCL) assumption and/or UL spatial relation information.
  • the one or more source RSs may include a serving cell ID and a BWP ID where the one or more source RSs are located. If the serving cell ID is absent, the serving cell in which the TCI state is configured is selected.
  • the one or more source RSs may include various RS types, including a synchronization signal block (SSB) , CSI-RS, a PRS, a PRACH, dedicated demodulation reference signals (DM-RS) of a PDSCH, a PDCCH, a PUCCH, or a PUSCH.
  • SSB synchronization signal block
  • CSI-RS CSI-RS
  • PRS PRS
  • PRACH PRACH
  • DM-RS dedicated demodulation reference signals
  • the one or more source RSs may provide various QCL assumptions and/or spatial relation information, including characteristics on delay, Doppler, and/or spatial Rx/Tx parameters.
  • the QCL may include a QCL-typeA including a Doppler shift, a Doppler spread, an average delay, and a delay spread, a QCL-typeB including the Doppler shift and the Doppler spread, a QCL-typeC including the Doppler shift and the average delay, and a QCL-typeD including a spatial Rx parameter.
  • the one or more source RSs may have different combinations based on provided QCL/spatial assumptions.
  • the joint DL/UL TCI state may include an ID of one source RS for QCL-TypeA/B/C.
  • three source RSs including a first RS for QCL-Type A/B/C/, a second RS for QCL-Type D, and a third RS for spatial relation information.
  • each of the joint DL/UL TCI states may include UL power control (PC) parameters indicating the UE to configure the UL transmission power.
  • the one or more power control parameters may include a pathloss reference signal (such as a CSI-RS or other reference signal) , a nominal power parameter (such a P0 or other nominal power) , a pathloss scaling factor (such as ⁇ or other scaling factor) , a close-loop index, an identifier of a power control group (such as a PC group ID) , or a combination thereof.
  • each of the joint DL/UL TCI states may include UL timing advance (TA) parameters indicating the UE to configure the TA for the UL transmission.
  • the one or more TA parameters may include a TA value, an identifier of a TA group (such as a TA group ID) , or a combination thereof.
  • each of the joint DL/UL TCI states may include one or more parameters for codebook and/or non-codebook based PUSCH transmission.
  • the one or more codebook or non-codebook parameters may include an SRS resource indicator (SRI) ; a precoding matrix indicator (PMI) , such as a transmission PMI (TPMI) ; a rank indicator (RI) , such as a transmission rank indicator (TRI) ; or a combination thereof.
  • each of the joint DL/UL TCI states may include UE panel IDs or similar IDs.
  • the UE panel ID (s) associated with the common DL/UL beam may include two separate panel IDs for DL and UL or a single panel ID for both DL and UL.
  • FIG. 4 is an example of MAC-CE 400 of wireless communication.
  • a base station may provide a MAC-CE to a UE to activate one or more configured joint DL/UL TCI states.
  • the DCI and/or MAC-CE may activate subsets of configured joint DL/UL TCI states, where each joint DL/UL TCI state may indicate a common beam for DL reception/UL transmission. That is, a set of joint DL/UL states may be configured, and the base station may transmit a MAC-CE to the UE to indicate the UE to activate one or more subsets of the configured joint DL/UL TCI states.
  • the activation MAC-CE 400 may include a bitmap indicating which configured joint DL/UL TCI state (s) are activated, and a serving cell ID and/or a BWP ID for which the activation MAC-CE 400 applies.
  • the MAC-CE 400 may include a variable size bitmap including any of a CORESET pool ID, a serving cell ID field, a BWP ID field, and TCI state fields.
  • a first octet (Oct) of the MAC-CE bitmap may include any of the CORESET pool ID, the serving cell ID, and the BWP ID.
  • the CORESET pool ID may indicate whether a mapping between the activated TCI states and a codepoint of the DCI is preconfigured or based on a preconfigured rule.
  • the length of the CORESET pool ID may be 1 bit.
  • the serving cell ID may indicate the identity of the serving cell for which the MAC-CE 400 applies.
  • the length of the serving cell ID field may be 5 bits.
  • the BWP ID may indicate a DL BWP for which the MAC-CE 400 applies as the codepoint.
  • the length of the BWP ID field may be 2 bits.
  • the remaining octets may be a bitmap of the joint DL/UL TCI states, each bit corresponding to each joint DL/UL TCI state. If a bit is set to 1, then the corresponding joint DL/UL TCI state may be activated.
  • the base station may configure up to 128 joint DL/UL TCI states, and the bitmap may have a bit length of 128 bits.
  • the MAC-CE 400 may select up to 8 bits, and therefore, the bitmap may have up to 8 bits set to 1 to activate the corresponding joint DL/UL TCI state.
  • the activated joint DL/UL TCI state may be applied to the following DL reception/UL transmission types or resources. That is, the activated joint DL/UL TCI states may indicate one or more DL reception/UL transmission types or resources to which the activated joint DL/UL TCI states may be applied.
  • the DL reception type or resource may include a PDCCH, a PDSCH, CSI-RS, PRS, and/or a SSB
  • the UL transmission type or resource may include a PUCCH, a PUSCH, SRS, and/or a PRACH.
  • the applicable DL reception/UL transmission type/resource per activated joint DL/UL TCI state may be determined via various options.
  • the applicable DL reception/UL transmission types/resources may be described in a specification (i.e., predetermined) .
  • predetermined it may be predetermined that the activated joint DL/UL TCI state can be applied to all DL receptions and UL transmissions types/resources in a component carrier (CC) where the MAC-CE is applied.
  • CC component carrier
  • the applicable DL reception/UL transmission types and/or resources may be configured or indicated by the base station, for example, via RRC/MAC-CE/DCI.
  • the base station may indicate that one activated joint DL/UL TCI state can be applied to all PDCCH, PUCCH, and SRS in the CC where the MAC-CE is applied.
  • a DCI may further indicate a TCI codepoint mapped to one activated joint DL/UL TCI state. That is, a TCI codepoint field in DCI may include TCI codepoint indexes, respectively mapped to the activated joint DL/UL TCI states.
  • the base station may transmit a DCI of a TCI codepoint field to the UE, including a TCI codepoint index mapped to an activated joint DL/UL TCI state among the activated multiple joint DL/UL TCI states.
  • the DCI carrying the TCI codepoint may or may not schedule any DL reception/UL transmission.
  • an acknowledgement may be sent by the UE to confirm the reception of the DCI. That is, the UE may miss the transmission of the DCI carrying the TCI codepoint (or an index of the TCI codepoint) , and therefore, to confirm the successful transmission of the DCI, the UE may send an information of acknowledgment back to the base station, in case the DCI does not schedule any DL/UL Transmission.
  • the indicated TCI codepoint may be used for DL reception/UL transmission scheduled by the DCI carrying the TCI codepoint (or an index of the TCI codepoint) , or the applicable DL reception/UL transmission may be indicated in a specification or by the base station, e.g., via RRC/MAC-CE/DCI. That is, in case the DCI indicating the TCI codepoint also schedules the DL/UL transmission, the TCI codepoint indicated by the DCI may be applied to that DL/UL transmission scheduled by the DCI.
  • the DCI scheduling PDSCH may also indicate a TCI codepoint mapped to one activated joint DL/UL TCI state for both the scheduled PDSCH and a corresponding PUCCH for ACK/NACK.
  • the TCI codepoint indicated by the DCI may be applied to the PDSCH and the corresponding PUCCH.
  • the DCI can indicate TCI codepoint mapped to one activated joint DL/UL TCI state for all UE specific DL receptions/UL transmissions. That is, in case a rule is predefined that applicable DL/UL TCI states correspond to all UE specific DL reception/UL transmission, then the activated joint DL/UL TCI state may be applicable for all the UE specified DL reception/UL transmission.
  • the activated joint DL/UL TCI state (s) by a MAC-CE may be sequentially mapped to candidate TCI codepoint (s) to be indicated in DCI. That is, the TCI states activated by the MAC-CE may be sequentially mapped to each bit of the TCI codepoints associated with the indexes of the TCI codepoints. For example, the MAC-CE may activate joint DL/UL TCI state ID #5, 7, 9, which sequentially maps to candidate TCI codepoints with values of 0, 1, 2.
  • the MAC-CE 400 may activate joint DL/UL TCI state T 5 , T 7 , and T 9 , and they may be sequentially mapped to bits of TCI codepoints associated with the index 0, 1, and 2 of the TCI codepoints.
  • the MAC-CE activation of any configured TCI states may have various options.
  • TCI state ID space separate TCI state ID spaces may be the DL TCI states, the UL TCI states, and the joint DL/UL TCI states, respectively.
  • a common TCI state ID space may be at least for two of the DL TCI states, the UL TCI states, and the joint DL/UL TCI states, or all of them.
  • separate MAC-CEs may be applied to activate the DL TCI states, the UL TCI states, and the joint DL/UL TCI states, respectively.
  • Separate MAC-CEs for the DL TCI states, the UL TCI states, and the joint DL/UL TCI states may work with separate TCI state ID spaces, respectively, for the DL TCI states, the UL TCI states, and the joint DL/UL TCI states.
  • a common MAC-CE may be at least for two of the DL TCI states, the UL TCI states, and the joint DL/UL TCI states, or all of them.
  • the common MAC-CE may work with separate TCI state ID spaces respectively for the DL TCI states, the UL TCI states, and the joint DL/UL TCI states or with the common TCI state ID space for the DL TCI states, the UL TCI states, and the joint DL/UL TCI states.
  • the MAC-CE may utilize an indicator to indicate the type of TCI states (i.e., the DL TCI state, the UL TCI state, or the joint DL/UL TCI state) and, accordingly, the activated TCI state ID may refer to the ID space for the type of TCI states indicated by the indicator.
  • a number of subsets of the set of TCI states may respectively be for the DL TCI states, the UL TCI states, and the joint DL/UL TCI states. That is, a first subset of the set of TCI states may be the DL TCI states, a second subset of the set of TCI states may be the UL TCI states, and a third subset of the set of TCI states may be the DL/UL TCI states.
  • FIG. 5 is a call flow diagram 500 of wireless communication including a UE 502 and a base station 504.
  • the base station 504 may transmit a MAC-CE to the UE 502, the MAC-CE activating a subset of configured joint DL and UL TCI states, each activated joint DL and UL TCI state indicating a common beam for communication in DL and UL.
  • the base station 504 may transmit a configuration indicating applicable DL/UL types or resources for activated joint DL/UL TCI states to the UE 502.
  • the applicable DL/UL types or resources may include one or more of the PDCCH, the PDSCH, the CSI-RS, or the PRS for the DL, and one or more of the PUCCH, the PUSCH, the SRS, or the PRACH for the UL.
  • the configuration may be received through at least one of the RRC signaling, the MAC-CE, and/or the DCI.
  • the base station 504 may transmit a DCI indicating an index of a TCI codepoint, the index corresponding to one of the activated joint DL and UL TCI states to the UE 502.
  • the UE 502 may transmit an acknowledgment to the base station 504 confirming reception of the DCI.
  • the base station 504 may transmit an indication of the DL resources and the UL resources for the communication to the UE 502. The indication may be received through one of the RRC signaling, the MAC-CE, or the DCI.
  • the UE 502 may determine DL resources and UL resources for the communication to which the one activated joint DL and UL TCI state corresponding to the index of the TCI codepoint indicated through the DCI applies.
  • the DL resources and the UL resources for the communication may be determined based on a predefined rule or the indication received at 610.
  • the UE 502 and the base station 504 may communicate with each other through DL and UL based on the activated joint DL and UL TCI states.
  • FIG. 6 is a flowchart 600 of a method of wireless communication. The method may be performed by a UE (e.g., the UE 104/502; the apparatus 702) .
  • a UE e.g., the UE 104/502; the apparatus 702 .
  • the UE may receive, from a base station, a MAC-CE activating a subset of configured joint DL and UL TCI states, each activated joint DL and UL TCI state indicating a common beam for communication in DL and UL (e.g., as at 506) .
  • the MAC-CE may include a bitmap indicating which configured joint DL and UL TCI states are activated, and at least one of a serving cell ID associated with the base station or a BWP ID for which the activation applies.
  • Each activated joint DL and UL TCI state may be associated with at least one of a PDCCH, a PDSCH, CSI-RS, PRS, or a SSB for DL, and at least one of a PUCCH, a PUSCH, SRS, or a PRACH for UL.
  • the joint DL and UL TCI states activated in the MAC-CE may be mapped with sequential indexes to a TCI codepoint.
  • the IDs of the configured joint DL and UL TCI states may be non-unique TCI state IDs.
  • the received MAC-CE may be associated with joint DL and UL TCI states, and not associated with DL TCI states or UL TCI states.
  • the received MAC-CE may be associated with joint DL and UL TCI states, and at least one of DL TCI states or UL TCI states, and the MAC-CE may indicate which subsets of TCI states in the MAC-CE are joint DL and UL TCI states, DL TCI states, and UL TCI states.
  • the IDs of the configured joint DL and UL TCI states may be unique TCI state IDs, and the received MAC-CE may be associated with joint DL and UL TCI states, and at least one of DL TCI states or UL TCI states.
  • 602 may be performed by a joint DL/UL TCI state activation component 740.
  • the UE may receive, from the base station, a configuration indicating which of a PDCCH, a PDSCH, a CSI-RS, a PRS, or an SSB is applicable for each of the activated joint DL and UL TCI states, and indicating which of a PUCCH, a PUSCH, an SRS, or a PRACH is applicable for each of the activated joint DL and UL TCI states (e.g., as at 508) .
  • the configuration may be received through one or more of RRC signaling, a MAC-CE, and/or DCI.
  • 604 may be performed by the joint DL/UL TCI state activation component 740.
  • the UE may receive, from the base station, a DCI indicating an index of a TCI codepoint, the index corresponding to one of the activated joint DL and UL TCI states (e.g., as at 510) .
  • the received DCI may not schedule the communication through DL or UL.
  • the received DCI may schedule the communication through DL or UL, and the communication through DL or UL scheduled through the DCI may be based on the one activated DL and UL TCI state corresponding to the index of the TCI codepoint that is indicated through the DCI.
  • 606 may be performed by the joint DL/UL TCI state activation component 740.
  • the UE may transmit an acknowledgment to the base station confirming reception of the DCI (e.g., as at 512) .
  • 608 may be performed by an ACK/NACK component 742.
  • the UE may receive, from the base station, an indication of the DL resources and the UL resources for the communication, and the DL resources and the UL resources for the communication may be determined based on the received indication (e.g., as at 514) .
  • the indication may be received through one of the RRC signaling, the MAC-CE, or the DCI.
  • 610 may be performed by the joint DL/UL TCI state activation component 740.
  • the UE may determine DL resources and UL resources for the communication to which the one activated joint DL and UL TCI state corresponding to the index of the TCI codepoint indicated through the DCI applies (e.g., as at 516) .
  • the DL resources and the UL resources for the communication may be determined based on a predefined rule.
  • the DL resources and the UL resources for the communication may be determined based on the indication received at 610. For example, 612 may be performed by the joint DL/UL TCI state activation component 740.
  • the UE may communicate through DL and UL with the base station based on the activated joint DL and UL TCI states (e.g., as at 518) .
  • the communicating through the DL and the UL with the base station may be through at least one of a serving cell at the base station associated with the serving cell ID or a BWP associated with the BWP ID.
  • the communication through DL or UL scheduled through the DCI may be based on the one activated DL and UL TCI state corresponding to the index of the TCI codepoint that is indicated through the DCI.
  • 614 may be performed by the joint DL/UL TCI state activation component 740.
  • FIG. 7 is a diagram 700 illustrating an example of a hardware implementation for an apparatus 702.
  • the apparatus 702 is a UE and includes a cellular baseband processor 704 (also referred to as a modem) coupled to a cellular RF transceiver 722 and one or more subscriber identity modules (SIM) cards 720, an application processor 706 coupled to a secure digital (SD) card 708 and a screen 710, a Bluetooth module 712, a wireless local area network (WLAN) module 714, a Global Positioning System (GPS) module 716, and a power supply 718.
  • the cellular baseband processor 704 communicates through the cellular RF transceiver 722 with the UE 104 and/or BS 102/180.
  • the cellular baseband processor 704 may include a computer-readable medium /memory.
  • the computer-readable medium /memory may be non-transitory.
  • the cellular baseband processor 704 is responsible for general processing, including the execution of software stored on the computer-readable medium /memory.
  • the software when executed by the cellular baseband processor 704, causes the cellular baseband processor 704 to perform the various functions described supra.
  • the computer-readable medium /memory may also be used for storing data that is manipulated by the cellular baseband processor 704 when executing software.
  • the cellular baseband processor 704 further includes a reception component 730, a communication manager 732, and a transmission component 734.
  • the communication manager 732 includes the one or more illustrated components.
  • the components within the communication manager 732 may be stored in the computer-readable medium /memory and/or configured as hardware within the cellular baseband processor 704.
  • the cellular baseband processor 704 may be a component of the UE 350 and may include the memory 360 and/or at least one of the TX processor 368, the RX processor 356, and the controller/processor 359.
  • the apparatus 702 may be a modem chip and include just the baseband processor 704, and in another configuration, the apparatus 702 may be the entire UE (e.g., see 350 of FIG. 3) and include the aforediscussed additional modules of the apparatus 702.
  • the communication manager 732 includes a joint DL/UL TCI state activation component 740 that is configured to receive a MAC-CE activating a subset of configured joint DL and UL TCI states, each activated joint DL and UL TCI state indicating a common beam for communication in DL and UL, receive a configuration indicating applicable DL/UL types or resources for activated joint DL/UL TCI states, receive a DCI indicating an index of a TCI codepoint, the index corresponding to one of the activated joint DL and UL TCI states, receive an indication of the DL resources and the UL resources for the communication, and the DL resources and the UL resources for the communication may be determined based on the received indication, determine DL resources and UL resources for the communication to which the one activated joint DL and UL TCI state corresponding to the index of the TCI codepoint indicated through the DCI applies, and communicate through DL and UL with the base station based on the activated joint DL and UL TCI states, e
  • the apparatus may include additional components that perform each of the blocks of the algorithm in the aforementioned flowcharts of FIGs. 5 and 6. As such, each block in the aforementioned flowcharts of FIGs. 5 and 6 may be performed by a component and the apparatus may include one or more of those components.
  • the components may be one or more hardware components specifically configured to carry out the stated processes/algorithm, implemented by a processor configured to perform the stated processes/algorithm, stored within a computer-readable medium for implementation by a processor, or some combination thereof.
  • the apparatus 702 and in particular the cellular baseband processor 704, includes means for receiving, from a base station, a MAC-CE activating a subset of configured joint DL/UL TCI states, each activated joint DL and UL TCI state indicating a common beam for communication in DL and UL, and means for communicating through DL and UL with the base station based on the activated joint DL and UL TCI states.
  • the apparatus 702 also includes means for receiving, from the base station, a configuration indicating which of the PDCCH, the PDSCH, the CSI-RS, the PRS, or the SSB is applicable for each of the activated joint DL and UL TCI states, and indicating which of the PUCCH, the PUSCH, the SRS, or the PRACH is applicable for each of the activated joint DL and UL TCI states.
  • the apparatus 702 also includes means for receiving, from the base station, DCI indicating an index of a TCI codepoint, the index corresponding to one of the activated joint DL and UL TCI states, and means for transmitting an acknowledgment to the base station confirming reception of the DCI.
  • the apparatus 702 also includes means for determining DL resources and UL resources for the communication to which the one activated joint DL and UL TCI state corresponding to the index of the TCI codepoint indicated through the DCI applies.
  • the apparatus 702 also includes means for receiving, from the base station, an indication of the DL resources and the UL resources for the communication, where the DL resources and the UL resources for the communication are determined based on the received indication.
  • the aforementioned means may be one or more of the aforementioned components of the apparatus 702 configured to perform the functions recited by the aforementioned means.
  • the apparatus 702 may include the TX Processor 368, the RX Processor 356, and the controller/processor 359.
  • the aforementioned means may be the TX Processor 368, the RX Processor 356, and the controller/processor 359 configured to perform the functions recited by the aforementioned means.
  • FIG. 8 is a flowchart 800 of a method of wireless communication.
  • the method may be performed by a base station (e.g., the base station 102/180/504; the apparatus 902) .
  • a base station e.g., the base station 102/180/504; the apparatus 902 .
  • the base station may transmit, to a UE, a MAC-CE activating a subset of configured joint DL and UL TCI states, each activated joint DL and UL TCI state indicating a common beam for communication in DL and UL (e.g., as at 506) .
  • the MAC-CE may include a bitmap indicating which configured joint DL and UL TCI states are activated, and at least one of a serving cell ID associated with the base station or a BWP ID for which the activation applies.
  • Each activated joint DL and UL TCI state may be associated with at least one of a PDCCH, a PDSCH, CSI-RS, PRS, or a SSB for DL, and at least one of a PUCCH, a PUSCH, SRS, or a PRACH for UL.
  • the joint DL and UL TCI states activated in the MAC-CE may be mapped with sequential indexes to a TCI codepoint.
  • the IDs of the configured joint DL and UL TCI states may be non-unique TCI state IDs.
  • the received MAC-CE may be associated with joint DL and UL TCI states, and not associated with DL TCI states or UL TCI states.
  • the received MAC-CE may be associated with joint DL and UL TCI states, and at least one of DL TCI states or UL TCI states, and the MAC-CE may indicate which subsets of TCI states in the MAC-CE are joint DL and UL TCI states, DL TCI states, and UL TCI states.
  • the IDs of the configured joint DL and UL TCI states may be unique TCI state IDs, and the received MAC-CE may be associated with joint DL and UL TCI states, and at least one of DL TCI states or UL TCI states.
  • 802 may be performed by a joint DL/UL TCI state activation component 940.
  • the base station may transmit, to the UE, a configuration indicating which of a PDCCH, a PDSCH, a CSI-RS, a PRS, or an SSB is applicable for each of the activated joint DL and UL TCI states, and indicating which of a PUCCH, a PUSCH, an SRS, or a PRACH is applicable for each of the activated joint DL and UL TCI states (e.g., as at 508) .
  • the configuration may be received through at least one of RRC signaling, a MAC-CE, or DCI.
  • 804 may be performed by the joint DL/UL TCI state activation component 940.
  • the base station may transmit, to the UE, a DCI indicating an index of a TCI codepoint, the index corresponding to one of the activated joint DL and UL TCI states (e.g., as at 510) .
  • the transmitted DCI may not schedule the communication through DL or UL.
  • the received DCI may schedule the communication through DL or UL, and the communication through DL or UL scheduled through the DCI may be based on the one activated DL and UL TCI state corresponding to the index of the TCI codepoint that is indicated through the DCI.
  • 806 may be performed by the joint DL/UL TCI state activation component 940.
  • the base station may receive an acknowledgment from the UE confirming reception of the DCI (e.g., as at 512) .
  • 808 may be performed by an ACK/NACK component 942.
  • the base station may transmit, to the UE, an indication of the DL resources and the UL resources for the communication, where the DL resources and the UL resources for the communication are determined based on the received indication (e.g., as at 514) .
  • the indication may be transmitted through one of the RRC signaling, the MAC-CE, or the DCI.
  • 810 may be performed by the joint DL/UL TCI state activation component 940.
  • the base station may communicate through DL and UL with the UE based on the activated joint DL and UL TCI states (e.g., as at 518) .
  • the communicating through the DL and the UL with the base station may be through at least one of a serving cell at the base station associated with the serving cell ID or a BWP associated with the BWP ID.
  • the communication through DL or UL scheduled through the DCI may be based on the one activated DL and UL TCI state corresponding to the index of the TCI codepoint that is indicated through the DCI.
  • 812 may be performed by the joint DL/UL TCI state activation component 940.
  • FIG. 9 is a diagram 900 illustrating an example of a hardware implementation for an apparatus 902.
  • the apparatus 902 is a BS and includes a baseband unit 904.
  • the baseband unit 904 may communicate through a cellular RF transceiver with the UE 104.
  • the baseband unit 904 may include a computer-readable medium /memory.
  • the baseband unit 904 is responsible for general processing, including the execution of software stored on the computer-readable medium /memory.
  • the software when executed by the baseband unit 904, causes the baseband unit 904 to perform the various functions described supra.
  • the computer-readable medium /memory may also be used for storing data that is manipulated by the baseband unit 904 when executing software.
  • the baseband unit 904 further includes a reception component 930, a communication manager 932, and a transmission component 934.
  • the communication manager 932 includes the one or more illustrated components.
  • the components within the communication manager 932 may be stored in the computer-readable medium /memory and/or configured as hardware within the baseband unit 904.
  • the baseband unit 904 may be a component of the BS 310 and may include the memory 376 and/or at least one of the TX processor 316, the RX processor 370, and the controller/processor 375.
  • the communication manager 932 includes a joint DL/UL TCI state activation component 940 that is configured to transmit a MAC-CE activating a subset of configured joint DL and UL TCI states, each activated joint DL and UL TCI state indicating a common beam for communication in DL and UL, transmit a configuration indicating applicable DL/UL types or resources for activated joint DL/UL TCI states, transmit a DCI indicating an index of a TCI codepoint, the index corresponding to one of the activated joint DL and UL TCI states, transmit an indication of the DL resources and the UL resources for the communication, where the DL resources and the UL resources for the communication are determined based on the received indication, and communicate with the UE through DL and UL based on the activated joint DL and UL TCI states e.g., as described in connection with 802, 804, 806, 810, and 812.
  • the communication manager 932 further includes an ACK/NACK component 942 that is configured to receive an acknowledg
  • the apparatus may include additional components that perform each of the blocks of the algorithm in the aforementioned flowcharts of FIGs. 5 and 8. As such, each block in the aforementioned flowcharts of FIGs. 5 and 8 may be performed by a component and the apparatus may include one or more of those components.
  • the components may be one or more hardware components specifically configured to carry out the stated processes/algorithm, implemented by a processor configured to perform the stated processes/algorithm, stored within a computer-readable medium for implementation by a processor, or some combination thereof.
  • the apparatus 902 includes means for transmitting, to a UE, a MAC-CE activating a subset of configured joint DL/UL TCI states, each activated joint DL and UL TCI state indicating a common beam for communication in DL and UL, and means for communicating through DL and UL with the UE based on the activated joint DL and UL TCI states.
  • the apparatus 902 also includes means for transmitting, to the UE, a configuration indicating which of the PDCCH, the PDSCH, the CSI-RS, the PRS, or the SSB is applicable for each of the activated joint DL and UL TCI states, and indicating which of the PUCCH, the PUSCH, the SRS, or the PRACH is applicable for each of the activated joint DL and UL TCI states, and means for transmitting, to the UE, DCI indicating an index of a TCI codepoint, the index corresponding to one of the activated joint DL and UL TCI states.
  • the apparatus 902 also includes means for receiving an acknowledgment (ACK) from the UE confirming reception of the DCI, and means for transmitting, to the UE, an indication of DL resources and UL resources for the communication, where the DL resources and the UL resources for the communication to which the one activated joint DL and UL TCI state corresponding to the index of the TCI codepoint indicated through the DCI applies are determined based on the transmitted indication.
  • the aforementioned means may be one or more of the aforementioned components of the apparatus 902 configured to perform the functions recited by the aforementioned means.
  • the apparatus 902 may include the TX Processor 316, the RX Processor 370, and the controller/processor 375.
  • the aforementioned means may be the TX Processor 316, the RX Processor 370, and the controller/processor 375 configured to perform the functions recited by the aforementioned means.
  • base station may transmit a MAC-CE to a UE, the MAC-CE activating a subset of configured joint DL and UL TCI states, each activated joint DL and UL TCI state indicating a common beam for communication in DL and UL.
  • the base station may transmit a configuration indicating applicable DL/UL types or resources for activated joint DL/UL TCI states to the UE.
  • the applicable DL/UL types or resources may include one or more of the PDCCH, the PDSCH, the CSI-RS, or the PRS for the DL, and one or more of the PUCCH, the PUSCH, the SRS, or the PRACH for the UL.
  • the configuration may be received through at least one of the RRC signaling, the MAC-CE, and/or the DCI.
  • the base station may transmit a DCI indicating an index of a TCI codepoint, the index corresponding to one of the activated joint DL and UL TCI states to the UE.
  • the UE may transmit an acknowledgment to the base station confirming reception of the DCI.
  • the base station may transmit an indication of the DL resources and the UL resources for the communication to the UE.
  • the indication may be received through one of the RRC signaling, the MAC-CE, or the DCI.
  • the UE may determine DL resources and UL resources for the communication to which the one activated joint DL and UL TCI state corresponding to the index of the TCI codepoint indicated through the DCI applies.
  • the DL resources and the UL resources for the communication may be determined based on a predefined rule or the indication received.
  • the UE and the base station may communicate with each other through DL and UL based
  • 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.
  • combinations such as “at least one of A, B, or C, ” “one or more of A, B, or C, ” “at least one of A, B, and C, ” “one or more of A, B, and C, ” and “A, B, C, or any combination thereof” may be A only, B only, C only, A and B, A and C, B and C, or A and B and C, where any such combinations may contain one or more member or members of A, B, or C.

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

Un UE peut recevoir un MAC-CE en provenance d'une station de base, le MAC-CE activant un sous-ensemble d'états TCI DL/UL conjoints configurés, chaque état TCI DL/UL conjoint activé indiquant un faisceau commun pour une communication en DL et UL, et peut communiquer avec la station de base par l'intermédiaire de la DL et de l'UL sur la base des états TCI DL/UL conjoints activés.
PCT/CN2020/114220 2020-09-09 2020-09-09 Procédés et appareil pour l'activation d'états tci dl/ul conjoints WO2022051936A1 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
PCT/CN2020/114220 WO2022051936A1 (fr) 2020-09-09 2020-09-09 Procédés et appareil pour l'activation d'états tci dl/ul conjoints
CN202180054113.8A CN116235592A (zh) 2020-09-09 2021-09-08 联合dl/ul tci状态激活
US18/018,503 US20230291533A1 (en) 2020-09-09 2021-09-08 Joint dl/ul tci state activation
PCT/CN2021/117102 WO2022052935A1 (fr) 2020-09-09 2021-09-08 Activation d'états conjoints de tci de dl/ul
EP21865989.4A EP4211963A1 (fr) 2020-09-09 2021-09-08 Activation d'états conjoints de tci de dl/ul

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2020/114220 WO2022051936A1 (fr) 2020-09-09 2020-09-09 Procédés et appareil pour l'activation d'états tci dl/ul conjoints

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EP3629492A1 (fr) * 2018-09-25 2020-04-01 Comcast Cable Communications LLC Configuration de faisceau pour des cellules secondaires
CN111277387A (zh) * 2019-04-26 2020-06-12 维沃移动通信有限公司 指示信息的传输方法及通信设备
US20200196383A1 (en) * 2018-12-14 2020-06-18 Asustek Computer Inc. Method and apparatus of beam indication in a wireless communication system
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EP3629492A1 (fr) * 2018-09-25 2020-04-01 Comcast Cable Communications LLC Configuration de faisceau pour des cellules secondaires
US20200196383A1 (en) * 2018-12-14 2020-06-18 Asustek Computer Inc. Method and apparatus of beam indication in a wireless communication system
CN111586862A (zh) * 2019-02-15 2020-08-25 华为技术有限公司 信息指示的方法及装置
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