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WO2022016372A1 - Procédés et appareil permettant de commuter des emplacements de période - Google Patents

Procédés et appareil permettant de commuter des emplacements de période Download PDF

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Publication number
WO2022016372A1
WO2022016372A1 PCT/CN2020/103281 CN2020103281W WO2022016372A1 WO 2022016372 A1 WO2022016372 A1 WO 2022016372A1 CN 2020103281 W CN2020103281 W CN 2020103281W WO 2022016372 A1 WO2022016372 A1 WO 2022016372A1
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WO
WIPO (PCT)
Prior art keywords
switching
frame structure
period
symbols
uplink transmission
Prior art date
Application number
PCT/CN2020/103281
Other languages
English (en)
Inventor
Bo Chen
Chenxi HAO
Hao Xu
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/CN2020/103281 priority Critical patent/WO2022016372A1/fr
Publication of WO2022016372A1 publication Critical patent/WO2022016372A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling
    • H04W72/1263—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows
    • H04W72/1268—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows of uplink data flows
    • 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
    • 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
    • H04L5/0096—Indication of changes in allocation
    • 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
    • H04L5/0051—Allocation of pilot signals, i.e. of signals known to the receiver of dedicated pilots, i.e. pilots destined for a single user or terminal
    • 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

Definitions

  • the present disclosure relates generally to communication systems, and more particularly, to carrier aggregation (CA) in wireless communication systems.
  • CA carrier aggregation
  • 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
  • the apparatus may be a base station.
  • the apparatus may schedule uplink (UL) data for a transmission by a user equipment (UE) .
  • the apparatus may also configure an UL transmit (Tx) switching configuration for carrier aggregation (CA) of a first component carrier (CC) and a second CC, the first CC including a first frame structure and the second CC including a second frame structure, the UL Tx switching configuration including one or more switching periods, a first switching period of the one or more switching periods corresponding to one or more UL symbols at an end of an uplink transmission period on the first CC.
  • the apparatus may signal the UL Tx switching configuration for CA of the first CC and the second CC.
  • the apparatus may also receive at least one UL signal based on the UL Tx switching configuration.
  • the apparatus may be a user equipment (UE) .
  • the apparatus may receive a transmission schedule for uplink (UL) data from a base station.
  • the apparatus may also receive an UL transmit (Tx) switching configuration for carrier aggregation (CA) of a first component carrier (CC) and a second CC, the first CC including a first frame structure and the second CC including a second frame structure, the UL Tx switching configuration including one or more switching periods, a first switching period of the one or more switching periods corresponding to one or more UL symbols at an end of an uplink transmission period on the first CC.
  • the apparatus may implement the UL Tx switching configuration for CA of the first CC and the second CC.
  • the apparatus may also transmit at least one UL signal based on the UL Tx switching configuration.
  • 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.
  • FIGs. 2A, 2B, 2C, and 2D are diagrams illustrating examples of a first 5G/NR frame, DL channels within a 5G/NR subframe, a second 5G/NR frame, and UL channels within a 5G/NR subframe, respectively.
  • FIG. 3 is a diagram illustrating an example of a base station and user equipment (UE) in an access network.
  • UE user equipment
  • FIGs. 4A and 4B are diagrams illustrating example frame structures in accordance with one or more techniques of the present disclosure.
  • FIG. 5 is a diagram illustrating an example frame structure in accordance with one or more techniques of the present disclosure.
  • FIGs. 6A and 6B are diagrams illustrating example frame structures in accordance with one or more techniques of the present disclosure.
  • FIGs. 7A and 7B are diagrams illustrating example frame structures in accordance with one or more techniques of the present disclosure.
  • FIG. 8 is a diagram illustrating an example frame structure in accordance with one or more techniques of the present disclosure.
  • FIGs. 9A and 9B are diagrams illustrating example frame structures in accordance with one or more techniques of the present disclosure.
  • FIG. 10 is a diagram illustrating example communication between a UE and a base station in accordance with one or more techniques of the present disclosure.
  • FIG. 11 is a flowchart of a method of wireless communication.
  • FIG. 12 is a flowchart of a method of wireless communication.
  • 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 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, FlashLinQ, WiMedia,
  • 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 in a 5 GHz unlicensed frequency spectrum.
  • AP Wi-Fi access point
  • STAs Wi-Fi stations
  • communication links 154 in a 5 GHz unlicensed frequency spectrum.
  • the STAs 152 /AP 150 may perform a clear channel assessment (CCA) prior to communicating in order to determine whether the channel is available.
  • 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 5 GHz unlicensed frequency spectrum 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.
  • 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 (mmW) frequencies, and/or near mmW frequencies in communication with the UE 104.
  • mmW millimeter wave
  • mmW base station Extremely high frequency (EHF) is part of the RF in the electromagnetic spectrum.
  • EHF Extremely high frequency
  • EHF has a range of 30 GHz to 300 GHz and a wavelength between 1 millimeter and 10 millimeters. Radio waves in the band may be referred to as a millimeter wave. Near mmW may extend down to a frequency of 3 GHz with a wavelength of 100 millimeters.
  • the super high frequency (SHF) band extends between 3 GHz and 30 GHz, also referred to as centimeter wave. Communications using the mmW /near mmW radio frequency band (e.g., 3 GHz -300 GHz) has extremely high path loss and a short range.
  • the mmW base station 180 may utilize beamforming 182 with the UE 104 to compensate for the extremely high path loss and short range.
  • 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 packet switched (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 an Access and Mobility Management Function (AMF) 192, other AMFs 193, a Session Management Function (SMF) 194, and a User Plane Function (UPF) 195.
  • the AMF 192 may 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 PS Streaming Service, and/or other IP services.
  • IMS IP Multimedia Subsystem
  • 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 base station 180 may include a transmission component 199 configured to schedule uplink (UL) data for a transmission by a user equipment (UE) .
  • Transmission component 199 may also be configured to configure an UL transmit (Tx) switching configuration for carrier aggregation (CA) of a first component carrier (CC) and a second CC, the first CC including a first frame structure and the second CC including a second frame structure, the UL Tx switching configuration including one or more switching periods, a first switching period of the one or more switching periods corresponding to one or more UL symbols at an end of an uplink transmission period on the first CC.
  • Transmission component 199 may also be configured to signal the UL Tx switching configuration for CA of the first CC and the second CC.
  • Transmission component 199 may also be configured to receive at least one UL signal based on the UL Tx switching configuration.
  • the UE 104 may include a reception component 198 configured to receive a transmission schedule for uplink (UL) data from a base station.
  • Reception component 198 may also be configured to receive an UL transmit (Tx) switching configuration for carrier aggregation (CA) of a first component carrier (CC) and a second CC, the first CC including a first frame structure and the second CC including a second frame structure, the UL Tx switching configuration including one or more switching periods, a first switching period of the one or more switching periods corresponding to one or more UL symbols at an end of an uplink transmission period on the first CC.
  • Reception component 198 may also be configured to implement the UL Tx switching configuration for CA of the first CC and the second CC.
  • Reception component 198 may also be configured to transmit at least one UL signal based on the UL Tx switching configuration.
  • 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 X is flexible for use between DL/UL, and subframe 3 being configured with slot format 34 (with mostly UL) . While subframes 3, 4 are shown with slot formats 34, 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 DL control information (DCI) , or semi-statically/statically through radio resource control (RRC) signaling) through a received slot format indicator (SFI) .
  • DCI DL control information
  • 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 5 allow for 1, 2, 4, 8, 16, and 32 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 5.
  • ⁇ is the numerology 0 to 5.
  • 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.
  • 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 x for one particular configuration, where 100x is the port number, 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) , each CCE including nine RE groups (REGs) , each REG including four consecutive REs in an OFDM symbol.
  • 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.
  • 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 physical uplink control channel (PUCCH) and DM-RS for the physical uplink shared channel (PUSCH) .
  • the PUSCH DM-RS may be transmitted in the first one or two symbols of the PUSCH.
  • the PUCCH DM-RS may be transmitted in different configurations depending on whether short or long PUCCHs are transmitted and depending on the particular PUCCH format used.
  • the UE may transmit sounding reference signals (SRS) .
  • the SRS may be transmitted in the last symbol of a subframe.
  • the SRS may have a comb structure, and a UE may transmit SRS on one of the combs.
  • the SRS may be used by a base station for channel quality estimation to enable frequency-dependent scheduling on the UL.
  • FIG. 2D illustrates an example of various UL channels within a subframe of a frame.
  • the PUCCH may be located as indicated in one configuration.
  • the PUCCH carries uplink control information (UCI) , such as scheduling requests, a channel quality indicator (CQI) , a precoding matrix indicator (PMI) , a rank indicator (RI) , and hybrid automatic repeat request (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 318TX.
  • Each transmitter 318TX may modulate a radio frequency (RF) carrier with a respective spatial stream for transmission.
  • RF radio frequency
  • each receiver 354RX receives a signal through its respective antenna 352.
  • Each receiver 354RX 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 which may store computer executable code for wireless communication of a user equipment (UE) , the code when executed by a processor (e.g., one or more of RX processor 356, TX processor 368, and/or controller/processor 359) instructs the processor to perform aspects of FIGs. 9, 10, and/or 11.
  • a processor e.g., one or more of RX processor 356, TX processor 368, and/or controller/processor 359
  • 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 which may store computer executable code for wireless communication of base station, the code when executed by a processor (e.g., one or more of RX processor 370, TX processor 316, and/or controller/processor 375) instructs the processor to perform aspects of FIGs. 9, 10, and/or 11.
  • a processor e.g., one or more of RX processor 370, TX processor 316, and/or controller/processor 375
  • 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.
  • aspects of wireless communication can include uplink (UL) one transmit (1Tx) to two transmit (2Tx) (1Tx-2Tx) switching where there is at least one new radio (NR) time division duplex (TDD) carrier, e.g., a high frequency band with a large bandwidth.
  • the 1Tx-2Tx switching can also include at least one NR frequency division duplex (FDD) UL carrier, e.g., a low frequency band with a smaller bandwidth compared to TDD, of a different carrier frequency.
  • FDD NR frequency division duplex
  • the uplink transmission can be time switched across multiple carriers when the UE is configured with an UL switching capability.
  • the location of a switching period or switching gap may be configured or semi-statically configured by radio resource control (RRC) signaling on a specific carrier of the two uplink carriers.
  • RRC radio resource control
  • FIGs. 4A and 4B are diagrams 400 and 450, respectively, illustrating example frame structures.
  • the frame structure in diagram 400 includes an FDD CC 401, a TDD CC 402, UL Tx switching periods or gaps 410, DL Rx interruption periods 420, and UL transmission periods 430.
  • the frame structure in diagram 400 displays a number of slots in a subframe.
  • FIG. 4A displays that the switching periods 410 are configured on CC 401. More generally, FIG. 4A displays RRC signaling configuring the carrier switch period on a first component carrier, e.g., CC 401.
  • the frame structure in diagram 450 includes an FDD CC 451, a TDD CC 452, UL Tx switching periods or gaps 460, DL Rx interruption periods 470, and UL transmission periods 480.
  • the frame structure in diagram 450 displays a number of slots in a subframe.
  • FIG. 4B displays that the switching periods 460 are configured on CC 452.
  • FIG. 4B displays RRC configuring the carrier switch period on a second component carrier, e.g., CC 452.
  • the switching periods or gaps may overlap with the uplink signal in the corresponding uplink slot of a first CC.
  • DL receive (Rx) interruption due to shared phase lock loop (PLL) for UL and DL.
  • PLL phase lock loop
  • UL Tx switching may need to re-tune the PLL on the frequency of the target CC.
  • the DL Rx interruption may occur as well during the PLL retuning, e.g., based on a shared PLL for UL and DL.
  • FIG. 5 is a diagram 500 illustrating an example frame structure.
  • the frame structure in diagram 500 includes an FDD CC 501, a TDD CC 502, UL Tx switching periods or gaps 510, DL Rx interruption periods 520, and UL transmission periods 530.
  • the frame structure in diagram 500 displays a number of slots in a subframe.
  • FIG. 5 displays that the switching periods 510 are configured on CC 501.
  • DL interruption analysis may occur for both switching periods on CC1 and switching periods on CC2.
  • the DL interruption length may depend on the switching length and the time misalignment between the Tx switching carrier and the sub-carrier spacing (SCS) of the victim DL carrier.
  • SCS sub-carrier spacing
  • the DL Rx interruptions 520 at the beginning of a DL slot may need to be avoided.
  • the DL Rx interruptions 520 at these locations may need to be avoided.
  • such DL Rx interruptions may not be able to be avoided due to UL Tx switching.
  • FIGs. 6A and 6B are diagrams 600 and 650, respectively, illustrating example frame structures.
  • the frame structure in diagram 600 includes a TDD CC 601, a TDD CC 602, UL Tx switching periods or gaps 610, and UL transmission periods 620.
  • the frame structure in diagram 600 displays a number of slots in a subframe.
  • FIG. 6A displays that the switching periods 610 are configured on CC 602.
  • FIG. 6A displays asynchronous TDD and TDD (T+T) carrier aggregation (CA) .
  • T+T TDD
  • CA carrier aggregation
  • a 1.5 ms offset for two aggregated TDD CCs may be used to stagger the UL slots across two carriers. So the UL Tx switching can be applied across the two TDD carriers.
  • the frame structure in diagram 650 includes a TDD CC 651, a TDD CC 652, UL Tx switching periods or gaps 660, and UL transmission periods 670.
  • the frame structure in diagram 650 displays a number of slots in a subframe.
  • FIG. 6B displays that the switching periods 660 are configured on CC 651.
  • FIG. 6B also displays asynchronous TDD and TDD (T+T) CA, as well as a 1.5 ms offset for two aggregated TDD CCs which may be used to stagger the UL slots across the two carriers.
  • the switching period may overlap with the UL symbols in the UL phase of the CC. Accordingly, there may be no overlapping UL symbols across multiple CCs. This can result in an unnecessary waste of UL symbols being used as the switching period for T+T CA, since the available DL symbols between each UL phase can be used as the switching period or gap. In this case, there may be additional UL symbols that can be utilized to improve UL performance. As such, there is a present need to reduce the amount of wasted UL symbols being used as the switching period for T+T CA.
  • aspects of the present disclosure may reduce the amount of wasted UL symbols being used as the switching periods for CA, e.g., T+T CA. For instance, the present disclosure may utilize additional UL symbols in order to improve UL performance. Additionally, aspects of the present disclosure may avoid DL Rx interruption at the beginning of a DL slot, such as by avoiding the UL Tx switching in this location. In some aspects, avoiding the beginning of a DL slot for UL Tx switching may be utilized for TDD and TDD (T+T) CA, as well as TDD and FDD (T+F) CA.
  • the present disclosure can include a new switching period location of UL Tx switching for TDD and FDD (T+F) or TDD and TDD (T+T) CA.
  • a new switching period location configuration may be used by default if the location of the switching period is not semi-statically configured by RRC signaling. So if a base station does not explicitly configure the location of the switching period, then a default configuration may be utilized. If the switching period is present, the switching period may be located at the last UL symbol preceding the UL transmission on one CC and immediately preceding the UL transmission on another CC.
  • FIGs. 7A and 7B are diagrams 700 and 750, respectively, illustrating example frame structures in accordance with one or more techniques of the present disclosure.
  • the frame structure in diagram 700 includes an FDD CC 701, a TDD CC 702, UL Tx switching periods or gaps 710, DL Rx interruption periods 720, and UL transmission periods 730.
  • the frame structure in diagram 700 displays a number of slots in a subframe.
  • FIG. 7A displays that the switching periods 710 are configured on CC 701 and CC 702.
  • a switching period may be located at the last UL symbols preceding the UL transmission on FDD CC 701 and immediately preceding the UL transmission on TDD CC 702.
  • the switching period on CC 701 may be located prior to the SRS transmission on CC 702, and prior to the UL transmission on CC 702. This switching period or gap 710 can also precede the UL transmission on CC 701.
  • frame structure in diagram 750 includes a TDD CC 751, a TDD CC 752, UL Tx switching periods or gaps 760, and UL transmission periods 770.
  • the frame structure in diagram 750 displays a number of slots in a subframe.
  • FIG. 7B displays that the switching periods 760 are configured on CC 751 and CC 752.
  • the switching period may be located at the last UL symbols preceding the UL transmission on TDD CC 751 and immediately preceding the UL transmission on TDD CC 752. So for T+T CA, the switching gap can be located at the last UL symbols which precede the UL transmission on the opposite CC.
  • the switching gap location for T+F CA there can be an exception for the aforementioned switching gap location for T+F CA, as there is a smaller bandwidth for FDD compared to TDD. For example, there may be a smaller bandwidth on FDD, e.g., 20-30 MHz, compared to a bandwidth on TDD, e.g., 100 MHz. Accordingly, if the switching gap is located on the FDD carrier, the performance loss due to the switching gap may be reduced.
  • FIG. 8 is a diagram 800 illustrating an example frame structure in accordance with one or more techniques of the present disclosure.
  • frame structure in diagram 800 includes an FDD CC 801, a TDD CC 802, UL Tx switching periods or gaps 810, DL Rx interruption periods 820, and UL transmission periods 830.
  • the frame structure in diagram 800 displays a number of slots in a subframe.
  • FIG. 8 displays that the switching periods 810 are configured on CC 801 and CC 802.
  • the present disclosure can include an exception for switching period locations of UL Tx switching for T+F CA, as the bandwidth of FDD carrier is smaller than that of TDD carrier.
  • SCS sub-carrier spacing
  • TDD sub-carrier spacing
  • SCS sub-carrier spacing
  • aspects of the present disclosure can also include a new switching period location of UL Tx switching for asynchronous T+T CA.
  • the location of the switching periods may be semi-statically configured by RRC signaling on one carrier of the two uplink carriers. If the switching period is present in one CC, the switching period may be located at the last DL symbols and/or the guard symbols in a special slot immediately preceding the UL transmission phase. The switching period can also be located in the last UL symbols in the UL transmission phase on the specific CC by RRC configuration. By doing so, more UL symbols can be achieved in the corresponding CC.
  • FIGs. 9A and 9B are diagrams 900 and 950, respectively, illustrating example frame structures in accordance with one or more techniques of the present disclosure.
  • the frame structure in diagram 900 includes a TDD CC 901, a TDD CC 902, UL Tx switching periods or gaps 910, and UL transmission periods 920.
  • the frame structure in diagram 900 displays a number of slots in a subframe.
  • FIG. 9A displays that the switching periods 910 are configured on CC 902.
  • frame structure in diagram 950 includes a TDD CC 951, a TDD CC 952, UL Tx switching periods or gaps 960, and UL transmission periods 970.
  • the frame structure in diagram 950 displays a number of slots in a subframe.
  • FIG. 9B displays that the switching periods 960 are configured on CC 951.
  • FIGs. 9A and 9B display UL Tx switching for T+T CA.
  • one switching gap may be located at the last UL symbols on one CC which corresponds to the last DL symbol on the other CC.
  • the switching gaps may be located on one of the two TDD CCs, e.g., CC 902 and CC 951.
  • the present disclosure can specify that the switching gap be scheduled at the last UL symbols on one CC, e.g., CC 902, as well as located at the guard symbol preceding the SRS and the UL transmission period on that same CC, e.g., CC 902.
  • one switching gap can be located in the guard symbol preceding the SRS on TDD CC 902 and TDD CC 951, as well as be located at the last UL symbols on TDD CC 902 and TDD CC 951 (which can correspond to the last DL symbols on TDD CC 901 and TDD CC 952) .
  • a switching period may be included in a portion of the DL symbols that immediately precede the guard symbols. For example, if the switching period corresponds to five (5) symbols and the guard symbol has two (2) symbols, the switching period may correspond to three (3) DL symbols preceding the guard symbols, as well as the two (2) guard symbols. Also, the switching period may correspond to either of the two TDD CCs.
  • FIG. 10 is a diagram 1000 illustrating example communication between a UE 1002 and a base station 1004.
  • base station 1004 may schedule a transmission of at least one UL signal, e.g., transmission schedule 1012, by a UE, e.g., UE 1002.
  • UE 1002 may receive a transmission schedule for at least one UL signal, e.g., transmission schedule 1012, from a base station, e.g., base station 1004.
  • base station 1004 may configure an UL transmit (Tx) switching configuration for carrier aggregation (CA) of a first component carrier (CC) and a second CC, the first CC including a first frame structure and the second CC including a second frame structure, the UL Tx switching configuration including one or more switching periods, a first switching period of the one or more switching periods corresponding to one or more UL symbols at an end of an uplink transmission period on the first CC.
  • Tx UL transmit
  • CA carrier aggregation
  • a second switching period of the one or more switching periods may correspond to one or more UL symbols at an end of an uplink transmission period on the second CC.
  • the first frame structure may be a frequency division duplex (FDD) frame structure or a time division duplex (TDD) frame structure and the second frame structure may be a TDD frame structure or a FDD frame structure.
  • a second switching period of the one or more switching periods may correspond to one or more UL symbols after a sounding reference symbol (SRS) transmission and within an uplink transmission period on the second CC.
  • the uplink transmission period on the first CC may correspond to at least one of one or more UL symbols in a special slot or one or more consecutive UL slots.
  • a second switching period of the one or more switching periods may correspond to one or more UL symbols at a beginning of a subsequent uplink transmission period on the first CC, where the subsequent uplink transmission may occur after the uplink transmission period.
  • the second switching period may occur during or between two adjacent UL slots on the second CC.
  • the first frame structure may be a FDD frame structure and the second frame structure may be a TDD frame structure.
  • a second switching period of the one or more switching periods may correspond to one or more guard symbols prior to the uplink transmission period on the first CC.
  • the second switching period may further correspond to one or more downlink (DL) symbols prior to the one or more guard symbols on the first CC.
  • the first frame structure may be a TDD frame structure and the second frame structure may be a TDD frame structure.
  • the UL Tx switching configuration may be configured via radio resource control (RRC) signaling.
  • RRC radio resource control
  • base station 1004 may signal the UL Tx switching configuration for CA of the first CC and the second CC, e.g., UL Tx switching configuration 1042.
  • UE 1002 may receive an UL transmit (Tx) switching configuration for carrier aggregation (CA) of a first component carrier (CC) and a second CC, e.g., UL Tx switching configuration 1042, the first CC including a first frame structure and the second CC including a second frame structure, the UL Tx switching configuration including one or more switching periods, a first switching period of the one or more switching periods corresponding to one or more UL symbols at an end of an uplink transmission period on the first CC.
  • Tx carrier aggregation
  • UE 1002 may implement the UL Tx switching configuration for CA of the first CC and the second CC, e.g., UL Tx switching configuration 1042.
  • UE 1002 may transmit at least one UL signal, e.g., UL signal 1072, based on the UL Tx switching configuration.
  • base station 1004 may receive at least one UL signal, e.g., UL signal 1072, based on the UL Tx switching configuration.
  • the at least one UL signal may be transmitted or received via at least one of the first CC and the second CC.
  • the at least one UL signal may be switched from the first CC to the second CC, or from the second CC to the first CC, during the one or more switching periods.
  • FIG. 11 is a flowchart 1100 of a method of wireless communication.
  • the method may be performed by a base station or a component of a base station (e.g., the base station 102, 180, 310, 1004; an apparatus; a processing system, which may include the memory 376 and which may be the entire base station or a component of the base station, such as the antenna (s) 320, receiver 318RX, the RX processor 370, the controller/processor 375, and/or the like) .
  • a base station or a component of a base station e.g., the base station 102, 180, 310, 1004; an apparatus; a processing system, which may include the memory 376 and which may be the entire base station or a component of the base station, such as the antenna (s) 320, receiver 318RX, the RX processor 370, the controller/processor 375, and/or the like
  • Optional aspects are illustrated with a dashed line.
  • the apparatus may schedule a transmission of at least one UL signal by a UE, as described in connection with the examples in FIGs. 4A, 4B, 5, 6A, 6B, 7A, 7B, 8, 9A, 9B, and 10.
  • the apparatus may configure an UL transmit (Tx) switching configuration for carrier aggregation (CA) of a first component carrier (CC) and a second CC, the first CC including a first frame structure and the second CC including a second frame structure, the UL Tx switching configuration including one or more switching periods, a first switching period of the one or more switching periods corresponding to one or more UL symbols at an end of an uplink transmission period on the first CC, as described in connection with the examples in FIGs. 4A, 4B, 5, 6A, 6B, 7A, 7B, 8, 9A, 9B, and 10.
  • CA carrier aggregation
  • a second switching period of the one or more switching periods may correspond to one or more UL symbols at an end of an uplink transmission period on the second CC, as described in connection with the examples in FIGs. 4A, 4B, 5, 6A, 6B, 7A, 7B, 8, 9A, 9B, and 10.
  • the first frame structure may be a frequency division duplex (FDD) frame structure or a time division duplex (TDD) frame structure and the second frame structure may be a TDD frame structure or a FDD frame structure, as described in connection with the examples in FIGs. 4A, 4B, 5, 6A, 6B, 7A, 7B, 8, 9A, 9B, and 10.
  • a second switching period of the one or more switching periods may correspond to one or more UL symbols after a sounding reference symbol (SRS) transmission and within an uplink transmission period on the second CC, as described in connection with the examples in FIGs. 4A, 4B, 5, 6A, 6B, 7A, 7B, 8, 9A, 9B, and 10.
  • the uplink transmission period on the first CC may correspond to at least one of one or more UL symbols in a special slot or one or more consecutive UL slots, as described in connection with the examples in FIGs. 4A, 4B, 5, 6A, 6B, 7A, 7B, 8, 9A, 9B, and 10.
  • a second switching period of the one or more switching periods may correspond to one or more UL symbols at a beginning of a subsequent uplink transmission period on the first CC, where the subsequent uplink transmission may occur after the uplink transmission period, as described in connection with the examples in FIGs. 4A, 4B, 5, 6A, 6B, 7A, 7B, 8, 9A, 9B, and 10.
  • the second switching period may occur during two adjacent UL slots on the second CC, as described in connection with the examples in FIGs. 4A, 4B, 5, 6A, 6B, 7A, 7B, 8, 9A, 9B, and 10.
  • first frame structure may be a FDD frame structure and the second frame structure may be a TDD frame structure, as described in connection with the examples in FIGs. 4A, 4B, 5, 6A, 6B, 7A, 7B, 8, 9A, 9B, and 10.
  • a second switching period of the one or more switching periods may correspond to one or more guard symbols prior to the uplink transmission period on the first CC, as described in connection with the examples in FIGs. 4A, 4B, 5, 6A, 6B, 7A, 7B, 8, 9A, 9B, and 10.
  • the second switching period may further correspond to one or more downlink (DL) symbols prior to the one or more guard symbols on the first CC, as described in connection with the examples in FIGs. 4A, 4B, 5, 6A, 6B, 7A, 7B, 8, 9A, 9B, and 10.
  • the first frame structure may be a TDD frame structure and the second frame structure may be a TDD frame structure, as described in connection with the examples in FIGs.
  • the UL Tx switching configuration may be configured via radio resource control (RRC) signaling, as described in connection with the examples in FIGs. 4A, 4B, 5, 6A, 6B, 7A, 7B, 8, 9A, 9B, and 10.
  • RRC radio resource control
  • the apparatus may signal the UL Tx switching configuration for CA of the first CC and the second CC, as described in connection with the examples in FIGs. 4A, 4B, 5, 6A, 6B, 7A, 7B, 8, 9A, 9B, and 10.
  • the apparatus may receive at least one UL signal based on the UL Tx switching configuration, as described in connection with the examples in FIGs. 4A, 4B, 5, 6A, 6B, 7A, 7B, 8, 9A, 9B, and 10.
  • the at least one UL signal may be received via at least one of the first CC and the second CC, as described in connection with the examples in FIGs. 4A, 4B, 5, 6A, 6B, 7A, 7B, 8, 9A, 9B, and 10.
  • the at least one UL signal may be switched from the first CC to the second CC, or from the second CC to the first CC, during the one or more switching periods, as described in connection with the examples in FIGs. 4A, 4B, 5, 6A, 6B, 7A, 7B, 8, 9A, 9B, and 10.
  • FIG. 12 is a flowchart 1200 of a method of wireless communication.
  • the method may be performed by a UE or a component of a UE (e.g., the UE 104, 350, 1002; an apparatus; a processing system, which may include the memory 360 and which may be the entire UE or a component of the UE, such as the TX processor 368, the controller/processor 359, transmitter 354TX, antenna (s) 352, and/or the like) .
  • Optional aspects are illustrated with a dashed line.
  • the methods described herein can provide a number of benefits, such as improving communication signaling, resource utilization, and/or power savings.
  • the apparatus may receive a transmission schedule for at least one UL signal from a base station, as described in connection with the examples in FIGs. 4A, 4B, 5, 6A, 6B, 7A, 7B, 8, 9A, 9B, and 10.
  • the apparatus may receive an UL transmit (Tx) switching configuration for carrier aggregation (CA) of a first component carrier (CC) and a second CC, the first CC including a first frame structure and the second CC including a second frame structure, the UL Tx switching configuration including one or more switching periods, a first switching period of the one or more switching periods corresponding to one or more UL symbols at an end of an uplink transmission period on the first CC, as described in connection with the examples in FIGs. 4A, 4B, 5, 6A, 6B, 7A, 7B, 8, 9A, 9B, and 10.
  • Tx UL transmit
  • CA carrier aggregation
  • a second switching period of the one or more switching periods may correspond to one or more UL symbols at an end of an uplink transmission period on the second CC, as described in connection with the examples in FIGs. 4A, 4B, 5, 6A, 6B, 7A, 7B, 8, 9A, 9B, and 10.
  • the first frame structure may be a frequency division duplex (FDD) frame structure or a time division duplex (TDD) frame structure and the second frame structure may be a TDD frame structure or a FDD frame structure, as described in connection with the examples in FIGs. 4A, 4B, 5, 6A, 6B, 7A, 7B, 8, 9A, 9B, and 10.
  • a second switching period of the one or more switching periods may correspond to one or more UL symbols after a sounding reference symbol (SRS) transmission and within an uplink transmission period on the second CC, as described in connection with the examples in FIGs. 4A, 4B, 5, 6A, 6B, 7A, 7B, 8, 9A, 9B, and 10.
  • the uplink transmission period on the first CC may correspond to at least one of one or more UL symbols in a special slot or one or more consecutive UL slots, as described in connection with the examples in FIGs. 4A, 4B, 5, 6A, 6B, 7A, 7B, 8, 9A, 9B, and 10.
  • a second switching period of the one or more switching periods may correspond to one or more UL symbols at a beginning of a subsequent uplink transmission period on the first CC, where the subsequent uplink transmission may occur after the uplink transmission period, as described in connection with the examples in FIGs. 4A, 4B, 5, 6A, 6B, 7A, 7B, 8, 9A, 9B, and 10.
  • the second switching period may occur during two adjacent UL slots on the second CC, as described in connection with the examples in FIGs. 4A, 4B, 5, 6A, 6B, 7A, 7B, 8, 9A, 9B, and 10.
  • first frame structure may be a FDD frame structure and the second frame structure may be a TDD frame structure, as described in connection with the examples in FIGs. 4A, 4B, 5, 6A, 6B, 7A, 7B, 8, 9A, 9B, and 10.
  • a second switching period of the one or more switching periods may correspond to one or more guard symbols prior to the uplink transmission period on the first CC, as described in connection with the examples in FIGs. 4A, 4B, 5, 6A, 6B, 7A, 7B, 8, 9A, 9B, and 10.
  • the second switching period may further correspond to one or more downlink (DL) symbols prior to the one or more guard symbols on the first CC, as described in connection with the examples in FIGs. 4A, 4B, 5, 6A, 6B, 7A, 7B, 8, 9A, 9B, and 10.
  • the first frame structure may be a TDD frame structure and the second frame structure may be a TDD frame structure, as described in connection with the examples in FIGs.
  • the UL Tx switching configuration may be configured via radio resource control (RRC) signaling, as described in connection with the examples in FIGs. 4A, 4B, 5, 6A, 6B, 7A, 7B, 8, 9A, 9B, and 10.
  • RRC radio resource control
  • the apparatus may implement the UL Tx switching configuration for CA of the first CC and the second CC, as described in connection with the examples in FIGs. 4A, 4B, 5, 6A, 6B, 7A, 7B, 8, 9A, 9B, and 10.
  • the apparatus may transmit at least one UL signal based on the UL Tx switching configuration, as described in connection with the examples in FIGs. 4A, 4B, 5, 6A, 6B, 7A, 7B, 8, 9A, 9B, and 10.
  • the at least one UL signal may be transmitted via at least one of the first CC and the second CC, as described in connection with the examples in FIGs. 4A, 4B, 5, 6A, 6B, 7A, 7B, 8, 9A, 9B, and 10.
  • the at least one UL signal may be switched from the first CC to the second CC, or from the second CC to the first CC, during the one or more switching periods, as described in connection with the examples in FIGs. 4A, 4B, 5, 6A, 6B, 7A, 7B, 8, 9A, 9B, and 10.
  • 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

La présente divulgation se rapporte à des procédés et à des dispositifs de communication sans fil comprenant un appareil, par exemple un équipement utilisateur (UE) et/ou une station de base. Selon un aspect de l'invention, l'appareil peut configurer une configuration de commutation de transmission en liaison montante pour une agrégation de porteuses d'une première porteuse composante et d'une seconde porteuse composante, la première porteuse composante comprenant une première structure de trame et la seconde porteuse composante comprenant une seconde structure de trame, la configuration de commutation de transmission en liaison montante comprenant une ou plusieurs périodes de commutation, une première période de commutation de la ou des périodes de commutation correspondant à un ou plusieurs symboles de liaison montante à une fin d'une période de transmission en liaison montante sur la première porteuse composante. L'appareil peut également signaler la configuration de commutation de transmission en liaison montante pour une agrégation de porteuses de la première porteuse composante et de la seconde porteuse composante. De plus, l'appareil peut recevoir au moins un signal de liaison montante sur la base de la configuration de commutation de transmission en liaison montante.
PCT/CN2020/103281 2020-07-21 2020-07-21 Procédés et appareil permettant de commuter des emplacements de période WO2022016372A1 (fr)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023143265A1 (fr) * 2022-01-28 2023-08-03 FG Innovation Company Limited Équipement utilisateur, station de base et procédé de commutation de tx entre de multiples bandes
WO2023208125A1 (fr) * 2022-04-28 2023-11-02 中国电信股份有限公司 Procédé de détermination d'état d'émetteur de terminal, système, station de base et terminal
WO2024033308A1 (fr) * 2022-08-09 2024-02-15 Sony Group Corporation Procédés de commutation de transmission de liaison montante autonome entre de multiples bandes de fréquences, nœud de réseau radio associé et dispositif sans fil associé
WO2024145805A1 (fr) * 2023-01-04 2024-07-11 Qualcomm Incorporated Indication d'un emplacement de période de commutation pour commutation de transmission de liaison montante

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CN103797747A (zh) * 2011-07-26 2014-05-14 高通股份有限公司 在无线网络中，使用载波聚合进行控制信息的传输
CN105580463A (zh) * 2013-09-26 2016-05-11 株式会社Ntt都科摩 用户终端以及无线通信方法
US20170303182A1 (en) * 2015-02-20 2017-10-19 Ntt Docomo, Inc. User apparatus, and uplink transmission switching method
CN109327300A (zh) * 2013-06-18 2019-02-12 三星电子株式会社 执行/支持上行链路载波切换的方法、用户设备和基站

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CN103797747A (zh) * 2011-07-26 2014-05-14 高通股份有限公司 在无线网络中，使用载波聚合进行控制信息的传输
CN109327300A (zh) * 2013-06-18 2019-02-12 三星电子株式会社 执行/支持上行链路载波切换的方法、用户设备和基站
CN105580463A (zh) * 2013-09-26 2016-05-11 株式会社Ntt都科摩 用户终端以及无线通信方法
US20170303182A1 (en) * 2015-02-20 2017-10-19 Ntt Docomo, Inc. User apparatus, and uplink transmission switching method

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023143265A1 (fr) * 2022-01-28 2023-08-03 FG Innovation Company Limited Équipement utilisateur, station de base et procédé de commutation de tx entre de multiples bandes
WO2023208125A1 (fr) * 2022-04-28 2023-11-02 中国电信股份有限公司 Procédé de détermination d'état d'émetteur de terminal, système, station de base et terminal
WO2024033308A1 (fr) * 2022-08-09 2024-02-15 Sony Group Corporation Procédés de commutation de transmission de liaison montante autonome entre de multiples bandes de fréquences, nœud de réseau radio associé et dispositif sans fil associé
WO2024145805A1 (fr) * 2023-01-04 2024-07-11 Qualcomm Incorporated Indication d'un emplacement de période de commutation pour commutation de transmission de liaison montante

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