WO2022021223A1 - Communication en liaison descendante à largeur de bande limitée pour un saut de fréquence de sous-bwp - Google Patents

Communication en liaison descendante à largeur de bande limitée pour un saut de fréquence de sous-bwp Download PDF

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Publication number
WO2022021223A1
WO2022021223A1 PCT/CN2020/105874 CN2020105874W WO2022021223A1 WO 2022021223 A1 WO2022021223 A1 WO 2022021223A1 CN 2020105874 W CN2020105874 W CN 2020105874W WO 2022021223 A1 WO2022021223 A1 WO 2022021223A1
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WIPO (PCT)
Prior art keywords
narrower
bwp
slot
csi
pdcch
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PCT/CN2020/105874
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English (en)
Inventor
Jing Dai
Chao Wei
Qiaoyu Li
Min Huang
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Qualcomm Incorporated
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Publication date
Application filed by Qualcomm Incorporated filed Critical Qualcomm Incorporated
Priority to PCT/CN2020/105874 priority Critical patent/WO2022021223A1/fr
Publication of WO2022021223A1 publication Critical patent/WO2022021223A1/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
    • H04L5/0003—Two-dimensional division
    • H04L5/0005—Time-frequency
    • H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
    • H04L5/0012—Hopping in multicarrier systems
    • 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
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
    • 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
    • H04L5/0098—Signalling of the activation or deactivation of component carriers, subcarriers or frequency bands

Definitions

  • the present disclosure relates generally to communication systems, and more particularly, to wireless communication including frequency hopping.
  • 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 user equipment may employ cross-bandwidth part (BWP) frequency hopping to improve diversity for uplink or downlink transmissions.
  • BWP cross-bandwidth part
  • the UE may perform the frequency hopping across subBWPs within a BWP. Aspects presented herein enable the UE to determine downlink communication to monitor when downlink signals or downlink channels occur in different subBWPs.
  • a method, a computer-readable medium, and an apparatus are provided.
  • the method may be performed by a UE.
  • the UE receives a configuration for one or more downlink transmissions based on frequency hopping across a set of narrower bandwidth parts (BWPs) comprised within an active BWP for the UE.
  • BWPs narrower bandwidth parts
  • the UE monitors for the one or more downlink transmissions within a single narrower BWP (e.g., a subBWP) .
  • a method, a computer-readable medium, and an apparatus are provided.
  • the method may be performed by a base station.
  • the base station transmits a configuration to a UE for one or more downlink transmissions based on frequency hopping across a set of narrower BWPs comprised within an active BWP for the UE.
  • the base station transmits a channel state information reference signal (CSI-RS) and receives a channel state information (CSI) report from the UE based on reception of the CSI-RS within a narrower BWP of the set of narrower BWPs based on the one or more downlink transmissions monitored in the slot.
  • CSI-RS channel state information reference signal
  • CSI channel state information
  • 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 illustrates examples of frequency hopping patterns for wireless communication between a UE and a base station.
  • FIG. 5 illustrates an example of a BWP that comprises multiple subBWPs.
  • FIG. 6 illustrates examples of frequency hopping patterns for a physical downlink shared channel.
  • FIG. 7 illustrates an example of prioritizing monitoring or reception of downlink communication within a single subBWP in a slot.
  • FIG. 8 illustrates an example for determining downlink communication to monitor among multiple subBWPs.
  • FIG. 9 illustrates an example communication flow between a UE and a base station.
  • FIG. 10 is a flowchart of a method of wireless communication at a UE.
  • FIG. 11 is a diagram illustrating an example of a hardware implementation for an example apparatus.
  • FIG. 12 is a flowchart of a method of wireless communication at a base station.
  • FIG. 13 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)
  • WWAN wireless wide area network
  • EPC Evolved Packet Core
  • 5GC 5G Core
  • Some of the UEs may include reduced capability UEs that support a reduced maximum bandwidth and/or have reduced complexity. Aspects presented herein help to enable the UE to perform cross-BWP frequency hopping for the reception of downlink communication from the base station 102 or 180 across multiple subBWPs within an active downlink BWP.
  • the UE 104 may include a downlink reception component 198 configured to receive a configuration for one or more downlink transmissions based on frequency hopping across a set of narrower BWPs comprised within an active BWP for the UE and to monitor for the one or more downlink transmissions within a single narrower BWP (e.g., a subBWP) .
  • the base station 102 or 180 may include a CSI report component that is configured to receive a CSI report from the UE 104 based on measurement of a CSI-RS within a subBWP.
  • the base station 102 or 180 may transmit a configuration to a UE 104 for one or more downlink transmissions based on frequency hopping across a set of narrower BWPs comprised within an active BWP for the UE 104.
  • the base station 102 or 180 may transmit a CSI-RS and receivs a CSI report from the UE 104 based on reception of the CSI-RS within a narrower BWP of the set of narrower BWPs based on the one or more downlink transmissions monitored in the slot.
  • 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.
  • 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 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 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.
  • 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 CSI-RS for channel estimation at the UE.
  • DM-RS demodulation RS
  • 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 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 SDUs
  • 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 the downlink reception component 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 the CSI report component 199 of FIG. 1.
  • wireless communication may support high capability devices and may provide a baseline for wireless communication that takes into consideration advanced and diverse requirements.
  • examples of higher capability devices include premium smartphones, V2X devices, URLLC devices, eMBB devices, etc.
  • wireless communication may support reduced capability devices. It may be beneficial for the wireless communication system to be scalable and deployable in a more efficient and cost-effective way.
  • Examples of reduced capability devices may include wearables, industrial wireless sensor networks (IWSN) , surveillance cameras, low-end smartphones, among others.
  • IWSN industrial wireless sensor networks
  • NR communication systems may support both higher capability devices and reduced capability devices.
  • a reduced capability device may be referred to as an NR light device, a low-tier device, a lower tier device, etc.
  • Reduced capability UEs may communicate based on various types of wireless communication. For example, smart wearables may transmit or receive communication based on low power wide area (LPWA) /mMTC, relaxed IoT devices may transmit or receive communication based on URLLC, sensors/cameras may transmit or receive communication based on eMBB, etc.
  • LPWA low power wide area
  • mMTC relaxed IoT devices
  • URLLC URLLC
  • sensors/cameras may transmit or receive communication based on eMBB, etc.
  • a peak throughput, latency, or reliability may be relaxed to allow for greater power consumption efficiency, reduce system overhead, and provide cost improvements.
  • a lower complexity UE or reduced capability may have smaller bandwidth capabilities, a reduced number of reception antennas, relaxed UE processing, or relaxed PDCCH monitoring.
  • a reduced capability UE may have an uplink transmission power of at least 10 dB less than that a higher capability UE.
  • industrial wireless sensors may have an acceptable latency up to approximately 100 ms.
  • the latency of industrial wireless sensors may be acceptable up to 10 ms or up to 5 ms.
  • the data rate may be lower and may include more uplink traffic than downlink traffic.
  • video surveillance devices may have an acceptable latency up to approximately 500 ms.
  • a reduced capability UE may have a reduced number of reception antennas in comparison to other UEs.
  • a reduced capability UE may have only a single receive antenna and may experience a lower equivalent receive signal to noise ratio (SNR) in comparison to higher capability UEs that may have multiple antennas.
  • SNR receive signal to noise ratio
  • a reduced capability UE may have reduced transmission bandwidth or reception bandwidth than other UEs.
  • a reduced capability UE may have a maximum operating bandwidth of 20MHz for both transmission and reception in FR1, in contrast to other higher capability UEs which may support a bandwidth for a band (e.g., 50 MHz for 15 kHz SCS or 100 MHz for 30/60 kHz for band n78 that is between 330 MHz -3800 MHz) .
  • Reduced capability UEs may also have reduced computational complexity than other UEs.
  • a UE may be limited from transmitting PUSCH or PUCCH outside of an active uplink BWP and may be limited from receiving PDSCH outside of an active downlink BWP.
  • the UE may perform frequency hopping when transmitting a PUSCH or a PUCCH, and the frequency hopping may be limited to be within the BWP boundary of the active uplink BWP. In some aspects, the UE may not support frequency hopping for the reception of PDSCH.
  • cross-BWP frequency hopping may provide added diversity.
  • intra-BWP frequency hopping may provide a limited diversity gain, and better diversity gain may be provided through cross-BWP frequency hopping.
  • a single reception antenna at a reduced capability UE may have diversity loss in comparison to multiple reception antennas.
  • Cross-BWP frequency hopping of the PDSCH may improve the diversity for downlink reception with a single antenna or with a reduced number of antennas.
  • FIG. 4 illustrates an example 400 of frequency hopping within a wide uplink BWP.
  • the UE may perform RF retuning between reception or transmission on a different frequency range.
  • the frequency hopping pattern in the example 400 may involve RF retuning in each slot because the frequency hops to a different frequency in each slot.
  • the example 450 illustrates frequency hopping with slot bundling that may help to reduce the amount of RF retuning performed by a UE.
  • the successive slots may also improve channel estimation and phase tracking.
  • the UE performs RF retuning after a set of slots, e.g., 4 slots in the example 450.
  • the example 450 with a bundling of 4 slots is merely an example, and bundling may be applied for any number of slots.
  • the example 450 illustrates hopping between two narrow BWP rather than within a wide BWP.
  • the transmissions in FIG. 4 at the first frequency and the second frequency may be PUSCH, PUCCH, or PDSCH.
  • Cross-BWP frequency hopping may be based on a configuration of multiple (e.g., two or more) BWPs to be associated with each other.
  • the two or more BWPs may be referred to as companion BWPs.
  • Cross-BWP frequency hopping may be performed among the associated BWPs, e.g., the companion BWPs.
  • the companion BWPs may be configured to each have a same numerology (e.g., a same SCS and CP length) and a same bandwidth at different frequency locations.
  • cross-BWP frequency hopping may be based on subBWPs that are configured or defined within a wide BWP.
  • the cross-BWP frequency hopping may be performed within the subBWPs of the BWP.
  • the subBWPs may be referred to as narrowbands within a wide BWP, narrower BWPs within a wider BWP, or subbands within a wide BWP.
  • FIG. 5 illustrates an example 500 of subBWPs having a narrower frequency range within a wider frequency range of a BWP.
  • the subBWPs may be configured to each have a same numerology (e.g., a same SCS and CP length) and a same bandwidth at different frequency locations.
  • the illustration of four subBWPs within a BWP is merely to illustrate the concept. Any number of subBWPs may be configured. In some examples, the number of subBWPs within a BWP may be based on a maximum bandwidth supported by a UE.
  • the bandwidth of the subBWPs may be configured to be no larger than a maximum bandwidth that a UE can support.
  • the UE may be a reduced capability UE, and the bandwidth of the subBWPs may be limited to a maximum bandwidth supported by a reduced capability UE.
  • the maximum bandwidth may be no more than 20 MHz, no more than 15 MHz, no more than 5 MHz, etc.
  • FIG. 6 illustrates examples 600 and 650 of frequency hopping across subBWPs for the reception of PDSCH.
  • the examples 600 and 650 illustrate the time gap 602 for RF retuning between reception on different subBWPs.
  • the first hop of the PDSCH is in the same subBWP as the PDCCH scheduling the PDSCH and no RF retuning is performed between reception of the PDCCH and the PDSCH.
  • the UE performs RF retuning between the first hop transmission of the PDSCH in subBWP 2 and the second hop transmission of the PDSCH in subBWP 4.
  • the first hop of the PDSCH transmission is in a different subBWP, e.g., subBWP 4, than the PDCCH in subBWP 2.
  • the UE performs RF retuning between receiving the PDCCH and receiving the first hop transmission of the PDSCH in subBWP 4.
  • the UE again performs RF retuning between the first hop PDSCH transmission in subBWP 4 and the second hop PDSCH transmission in subBWP 2.
  • the PDCCH scheduling the PDSCH may indicate the type of frequency hopping pattern of the scheduled PDSCH, e.g., such as a first type of frequency hopping pattern with a first hop of the PDSCH in the same subBWP as the PDSCH (e.g., example 400) or a second type of frequency hopping pattern with a first hop of the PDSCH in a different subBWP than the PDCCH (e.g., example 450) .
  • the PDCCH-to-PDSCH offset e.g., an amount of time between transmission of the PDCCH scheduling PDSCH and transmission of the PDSCH being scheduled, may be no smaller than a threshold.
  • the threshold may be based on a UE capability, for example.
  • aspects presented herein provide configurations and signaling that enable downlink signals and downlink channels having a limited maximum bandwidth for a reduced capability UE to include frequency hopping across multiple subBWPs.
  • a UE may simultaneously receive downlink signals or downlink channels that are within a same subBWP in a slot, and may not receive downlink signals or downlink channels outside the subBWP in the slot. Aspects presented herein enable a UE to determine which downlink signal or downlink channel to monitor when downlink signals or downlink channels are scheduled in different subBWPs in the same slot.
  • Some downlink communication may be based on a semi-static configuration, and the UE may monitor for such downlink communication in a semi-static or periodic manner.
  • the UE may monitor for a PDCCH from the base station based on configured CORESETs and/or search space sets based on a semi-static pattern.
  • the UE may monitor for an SSB from the base station based on a semi-static pattern.
  • Each CORESET or search space may be configured to have a bandwidth that is within a particular subBWP configured for the UE.
  • a CORESET configuration or a search space configuration may include an association with one of the subBWPs of the downlink BWP.
  • FIG. 7 illustrates an example 700 showing a CORESET associated with subBWP 3 that includes resources in each slot and a CORESET associated with subBWP 1 that includes resources in every other slot.
  • the UE may not be required to monitor for PDCCH at more than one subBWP within a single, e.g., in order to avoid RF retuning within the single slot.
  • the example 700 includes CORESETs configured at different subBWPs in every other slot, the UE may determine which CORESET to monitor and which CORESET to skip.
  • a priority of a PDCCH for the UE to monitor in a slot having multiple configured CORESETs or search spaces may be based on a search space type. For example, the UE may prioritize monitoring for PDCCH based on a common search space (CSS) over monitoring for PDCCH based on a UE specific search space (USS) . For example, if in the first slot, the CORESET associated with subBWP 3 is for a CSS and the CORESET associated with subBWP 1 is for a USS, the UE may monitor for the PDCCH in the CORESET in subBWP 3 and may skip monitoring the CORESET 702 in subBWP 1.
  • CCS common search space
  • USS UE specific search space
  • the UE may determine a priority of the PDCCH to monitor in a slot based on a search space ID or a CORESET ID. In some examples, a smaller ID may have a higher priority than a larger ID. In some examples, the UE may determine a priority of the PDCCH to monitor based on the search space ID or the CORESET ID if the CORESET/search space are of the same type. For example, in a slot having CORESET 1 and CORESET 2 configured in different subBWPs and both are based on a same type (e.g., CSS or USS) , the UE may monitor for CORESET 1 and may skip CORESET 2 because “1” is lower than “2. ” Alternately, the UE may prioritize a higher ID over a lower ID and may monitor CORESET 2 and skip CORESET 1.
  • a search space ID or a CORESET ID In some examples, a smaller ID may have a higher priority than a larger ID. In some examples, the UE may determine
  • the UE may not be required to monitor for a PDCCH and an SSB from the base station in different subBWPs within a same slot.
  • the UE may determine whether to monitor for the PDCCH or the SSB based on a type of search space associated with the PDCCH. For example, the UE may prioritize monitoring for a PDCCH based on a CSS over monitoring for the SSB and may skip reception of the SSB in a different subBWP. In another example, the UE may prioritize reception of the SSB over monitoring for PDCCH based on a USS in a different BWP and make skip monitoring for the PDCCH in the different BWP.
  • a priority rule may indicate a priority based on CSS > SSB > USS.
  • the UE may determine to receive the SSB in subBWP 3 and may skip monitoring for the PDCCH in the CORESET 702 in subBWP 1, as an example.
  • the frequency domain resource of an SSB may be across a subBWP border, e.g., between two adjacent subBWPs, as illustrated in the example 800 in FIG. 8.
  • the subBWP split may provide flexibility from a base station implementation.
  • the frequency range of the SSB may require RF retuning regardless of the subBWP of the PDCCH, and the UE may skip monitoring for the PDCCH in a slot if the SSB is across a subBWP boundary.
  • the UE may skip monitor the PDCCH 802 in subBWP 1 and may also skip monitoring for PDCCH 804 in subBWP 3 based on the SSB frequency range overlapping a boundary between two adjacent subBWPs.
  • the UE may determine whether to receive PDSCH scheduled in a different subBWP than PDCCH (e.g., based on a CORESET or search space) .
  • the UE may not be required to receive PDSCH and monitor for PDCCH/SSB in different subBWPs of a same slot.
  • the UE may prioritize reception of the PDSCH over monitoring for PDCCH or reception of an SSB, e.g., as the PDSCH is dynamically scheduled by the base station. If the PDCCH and the PDSCH are in the same subBWP in the same slot, the UE may receive both the PDCCH and the PDSCH. If the SSB and the PDSCH are in the same subBWP in the same slot, the UE may receive both the SSB and the PDSCH in the slot.
  • the frequency domain resource allocation (FDRA) of the PDSCH may be indicated based on a subBWP index and a resource allocation within the indicated subBWP.
  • the resource allocation may be based on a Type 0 FDRA, e.g., based on a resource block group (RBG) bitmap.
  • the resource allocation may be based on a Type 1 FDRA, e.g., based on a resource block start and length indicator value (SLIV) .
  • the FDRA for the PDSCH may be indicated based on an RB SLIV having a starting RB (e.g. RB start ) within a wide BWP, e.g., the active downlink BWP that includes the subBWPs.
  • the length of the FDRA for the PDSCH (e.g., L RBs ) may not exceed a maximum UE bandwidth supported by the UE.
  • the UE may determine implicitly that the subBWP of the first hop of the PDSCH transmission will be the same as the scheduling PDCCH, such as shown in the example 600 in FIG. 6.
  • a UE may measure CSI-RS transmissions from a base station and report a CSI report to the base station based on the measurements.
  • the CSI-RS bandwidth may be within the wide BWP or within the bandwidth of a serving cell, whereas the UE may have a reduced bandwidth capability and may receive downlink transmissions on a subBWP.
  • the UE may report the CSI based on reception of the CSI-RS in a subBWP.
  • the subBWP in which the UE measures the CSI-RS may be the subBWP in which the UE receives another downlink signal or another downlink channel.
  • the other downlink channels may include any of PDCCH monitoring, SSB monitor, and/or reception of PDSCH. For example, in the second slot of FIG.
  • the CSI report may be based on the CSI-RS measured in subBWP 3 because the UE monitors the CORESET in subBWP 3 for PDCCH. If the UE monitors for the PDCCH in a subBWP in a slot, the UE does not return to another subBWP for the CSI-RS measurement in the same slot.
  • the UE may report the subBWP index, or an associated starting PRB index, in the CSI report that indicates the subBWP or the frequency range on which the CSI-RS was measured.
  • FIG. 9 is a call flow diagram 900 of signaling between a UE 902 and a base station 904.
  • the base station 904 may be configured to provide a cell.
  • the UE 902 may be configured to communicate with the base station 904.
  • the base station 904 may correspond to base station 102/180 and, accordingly, the cell may include a geographic coverage area 110 in which communication coverage is provided and/or small cell 102’ having a coverage area 110’.
  • a UE 902 may correspond to at least UE 104.
  • the base station 904 may correspond to base station 310 and the UE 902 may correspond to UE 350.
  • Optional aspects are illustrated with a dashed line.
  • the base station 904 may transmit a configuration for one or more downlink transmissions.
  • the base station 904 may transmit the configuration for one or more downlink transmissions to the UE 902.
  • the UE 902 may receive the configuration for one or more downlink transmissions.
  • the one or more downlink transmissions may be based on frequency hopping across a set of narrower BWPs.
  • the narrower BWPs may be comprised within an active BWP for the UE.
  • the configuration may include multiple CORESET configurations or multiple search space configurations. Each CORESET configuration or search space configuration may be associated with a different one of the narrower BWPs.
  • the UE 902 may monitor for the one or more downlink transmissions within a single narrower BWP during a slot.
  • the UE 902 may monitor for a PDCCH in one of the narrower BWPs during the slot based on at least one of a search space type of the multiple search space configurations, a CORESET ID of the multiple CORESET configurations, or a search space ID of the multiple search space configurations.
  • the UE 902 may monitor for the PDCCH based on a default narrower BWP if no narrower BWP is configured to be associated with a CORESET or search space.
  • the UE 902 may monitor for the PDCCH during the slot in a first narrower BWP associated with a CSS and may skip monitoring for the PDCCH in a second narrower BWP associated with a USS during the slot. In some aspects, the UE 902 may monitor for the PDCCH in a first narrower BWP associated with a smaller CORESET ID during the slot and may skip monitoring for the PDCCH in a second narrower BWP associated with a larger CORESET ID during the slot.
  • the smaller CORESET ID and the larger CORESET ID may be for a same search space type.
  • the UE 902 may monitor for the PDCCH in a first narrower BWP associated with a smaller search space ID during the slot and may skip monitoring for the PDCCH in a second narrower BWP associated with a larger search space ID during the slot.
  • the smaller search space ID and the larger search space ID may be for a same search space type.
  • the UE 902 may monitor for a PDCCH in a first narrower BWP associated with a CSS during the slot and may skip monitoring for an SSB in a second narrower BWP during the slot.
  • the UE 902 may monitor for a SSB in a first narrower BWP during the slot and may skip monitoring for a PDCCH in a second narrower BWP associated with a USS during the slot. In some aspects, the UE 902 may skip monitoring for a physical downlink control channel during the slot in which an SSB has a frequency range is overlapped with two consecutive narrower BWPs of the set of narrower BWPs. In some aspects, the UE 902 may monitor for a PDSCH in a first narrower BWP during the slot and skips monitoring for a PDCCH or a SSB in a second narrower BWP during the slot.
  • the base station 904 may transmit a CSI-RS.
  • the UE 902 may receive the CSI-RS.
  • the base station 904 may transmit the CSI-RS with a bandwidth that is based on the active BWP or a bandwidth of a serving cell.
  • the UE 902 may receive scheduling for a PDSCH configuration.
  • the UE 902 may receive scheduling for the PDSCH configuration from the base station 904.
  • the PDSCH configuration may indicate an index for narrower BWP in the set of narrower BWPs and a resource allocation within the narrower BWP.
  • the PDSCH configuration may indicate a starting RB and a number of RBs within the active BWP and within a maximum UE bandwidth.
  • the UE 902 may determine a narrower BWP within the active BWP for a first frequency hop of a PDSCH in a first narrower BWP based on a time gap between a PDCCH scheduling the PDSCH and the PDSCH. In some aspects, the UE 902 may determine the narrower BWP for the frequency hop of the PDSCH to be a same narrower BWP in which the PDCCH is received if the time gap is less than a threshold.
  • the UE 902 may transmit a CSI report.
  • the UE 902 may report the CSI based on reception of a CSI-RS within a narrower BWP of the set of narrower BWPs based on the one or more downlink transmissions monitored in the slot.
  • the UE 902 may report the CSI to the base station 904.
  • the base station may receive the CSI report.
  • the narrower BWP on which the CSI is based may be a narrower BWP in which the UE 902 monitors for a PDCCH or an SSB or receives a PDSCH.
  • the UE 902 may report the CSI based on reception of the CSI-RS in a default narrower BWP if no downlink signals or downlink channels are scheduled for the UE 902 to receive in a slot.
  • a bandwidth of the CSI-RS may be within the active BWP or with a bandwidth of a serving cell.
  • the UE 902 may indicate the narrower BWP when reporting the CSI.
  • the UE 902 may indicate the narrower BWP with an index for the narrower BWP or a starting RB associated with the narrower BWP.
  • FIG. 10 is a flowchart 1000 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, 902; the apparatus 1102; the cellular baseband processor 1104, which may include the memory 360 and which may be the entire UE 350 or a component of the UE 350, such as the TX processor 368, the RX processor 356, and/or the controller/processor 359) .
  • One or more of the illustrated operations may be omitted, transposed, or contemporaneous.
  • Optional aspects are illustrated with a dashed line.
  • the method may configure a UE to perform cross-BWP frequency hopping for the reception of downlink communication from the base station across multiple subBWPs within an active downlink BWP.
  • the UE may receive a configuration for one or more downlink transmissions.
  • 1002 may be performed by downlink reception component 1140 of apparatus 1102.
  • the UE may receive the configuration for one or more downlink transmissions based on frequency hopping across a set of narrower BWPs comprised within an active BWP for the UE.
  • the configuration may include multiple CORESET configurations or multiple search space configurations. Each CORESET configuration or search space configuration may be associated with a different one of the set of narrower BWPs.
  • the UE may monitor for the one or more downlink transmissions within a single narrower BWP during a slot.
  • 1004 may be performed by monitor component 1142 of apparatus 1102.
  • the UE may monitor for a PDCCH in one of the set of narrower BWPs during the slot based on at least one of a search space type of the multiple search space configurations, a CORESET ID of the multiple CORESET configurations, or a search space ID of the multiple search space configurations.
  • the UE may monitor for the PDCCH based on a default narrower BWP if no narrower BWP is configured to be associated with a CORESET or search space.
  • the UE may monitor for the PDCCH during the slot in a first narrower BWP associated with a CSS and may skip monitoring for the PDCCH in a second narrower BWP associated with a USS during the slot. In some aspects, the UE may monitor for the PDCCH in a first narrower BWP associated with a smaller CORESET ID during the slot and may skip monitoring for the PDCCH in a second narrower BWP associated with a larger CORESET ID during the slot.
  • the smaller CORESET ID and the larger CORESET ID may be for a same search space type.
  • the UE may monitor for the PDCCH in a first narrower BWP associated with a smaller search space ID during the slot and may skip monitoring for the PDCCH in a second narrower BWP associated with a larger search space ID during the slot.
  • the smaller search space ID and the larger search space ID may be for a same search space type.
  • the UE may monitor for a PDCCH in a first narrower BWP associated with a CSS during the slot and may skip monitoring for an SSB in a second narrower BWP during the slot.
  • the UE may monitor for a SSB in a first narrower BWP during the slot and may skip monitoring for a PDCCH in a second narrower BWP associated with a USS during the slot. In some aspects, the UE may skip monitoring for a physical downlink control channel during the slot in which an SSB has a frequency range is overlapped with two consecutive narrower BWPs of the set of narrower BWPs. In some aspects, the UE may monitor for a PDSCH in a first narrower BWP during the slot and skips monitoring for a PDCCH or a SSB in a second narrower BWP during the slot.
  • the UE may receive scheduling for a PDSCH configuration.
  • 1006 may be performed by scheduling component 1144 of apparatus 1102.
  • the PDSCH configuration may indicate an index for narrower BWP in the set of narrower BWPs and a resource allocation within the narrower BWP.
  • the UE may receive scheduling for a PDSCH configuration.
  • 1008 may be performed by scheduling component 1144 of apparatus 1102.
  • the PDSCH configuration may indicate a starting RB and a number of RBs within the active BWP and within a maximum UE bandwidth.
  • the UE may determine a narrower BWP within the active BWP for a first frequency hop of a PDSCH in a first narrower BWP based on a time gap between a PDCCH scheduling the PDSCH and the PDSCH.
  • 1010 may be performed by determination component 1146 of apparatus 1102.
  • the UE may determine the narrower BWP for the first frequency hop of the PDSCH to be a same narrower BWP in which the PDCCH is received if the time gap is less than a threshold.
  • the UE may report CSI.
  • 1012 may be performed by report component 1148 of apparatus 1102.
  • the UE may report the CSI based on reception of a CSI-RS within a narrower BWP of the set of narrower BWPs based on the one or more downlink transmissions monitored in the slot.
  • the narrower BWP on which the CSI is based may be the narrower BWP of the set of narrower BWPs in which the UE monitors for a PDCCH or an SSB or receives a PDSCH.
  • the UE may report the CSI based on reception of the CSI-RS in a default narrower BWP if no downlink signals or downlink channels are scheduled for the UE to receive in the slot.
  • a bandwidth of the CSI-RS may be within the active BWP or with a serving cell bandwidth.
  • the UE may indicate the narrower BWP when reporting the CSI.
  • the UE may indicate the narrower BWP with an index for the narrower BWP or a starting RB associated with the narrower BWP.
  • FIG. 11 is a diagram 1100 illustrating an example of a hardware implementation for an apparatus 1102.
  • the apparatus 1102 is a UE and includes a cellular baseband processor 1104 (also referred to as a modem) coupled to a cellular RF transceiver 1122 and one or more subscriber identity modules (SIM) cards 1120, an application processor 1106 coupled to a secure digital (SD) card 1108 and a screen 1110, a Bluetooth module 1112, a wireless local area network (WLAN) module 1114, a Global Positioning System (GPS) module 1116, and a power supply 1118.
  • the cellular baseband processor 1104 communicates through the cellular RF transceiver 1122 with the UE 104 and/or BS 102/180.
  • the cellular baseband processor 1104 may include a computer-readable medium /memory.
  • the computer-readable medium /memory may be non-transitory.
  • the cellular baseband processor 1104 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 1104, causes the cellular baseband processor 1104 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 1104 when executing software.
  • the cellular baseband processor 1104 further includes a reception component 1130, a communication manager 1132, and a transmission component 1134.
  • the communication manager 1132 includes the one or more illustrated components.
  • the components within the communication manager 1132 may be stored in the computer-readable medium /memory and/or configured as hardware within the cellular baseband processor 1104.
  • the cellular baseband processor 1104 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 1102 may be a modem chip and include just the cellular baseband processor 1104, and in another configuration, the apparatus 1102 may be the entire UE (e.g., see 350 of FIG. 3) and include the aforediscussed additional modules of the apparatus 1102.
  • the communication manager 1132 includes a downlink reception component 1140 that is configured to receive a configuration for one or more downlink transmissions, e.g., as described in connection with 1002 of FIG. 10.
  • the communication manager 1132 further includes a monitor component 1142 that is configured to monitor for the one or more downlink transmissions within a single narrower BWP during a slot, e.g., as described in connection with 1004 of FIG. 10.
  • the communication manager 1132 further includes a scheduling component 1144 that is configured to receive scheduling for a PDSCH configuration, e.g., as described in connection with 1006 of FIG. 10.
  • the scheduling component 1144 may be configured to receive scheduling for a PDSCH configuration, e.g., as described in connection with 1008 of FIG. 10.
  • the communication manager 1132 further includes a determination component 1146 that is configured to determine a narrower BWP within the active BWP for a first frequency hop of a PDSCH in a first narrower BWP, e.g., as described in connection with 1010 of FIG. 10.
  • the communication manager 1132 further includes a report component 1148 that is configured to report CSI, e.g., as described in connection with 1012 of FIG. 10.
  • the apparatus may include additional components that perform each of the blocks of the algorithm in the aforementioned flowchart of FIG. 10. As such, each block in the aforementioned flowchart of FIG. 10 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 1102 includes means for receiving a configuration for one or more downlink transmissions based on frequency hopping across a set of narrower BWPs comprised within an active BWP for the UE.
  • the apparatus includes means for monitoring for the one or more downlink transmissions within a single narrower BWP during a slot.
  • the apparatus further includes means for receiving scheduling for a PDSCH configuration indicating an index for narrower BWP in the set of narrower BWPs and a resource allocation within the narrower BWP.
  • the apparatus further includes means for receiving scheduling for a PDSCH configuration indicating a starting RB and a number of RBs within the active BWP and within a maximum UE bandwidth.
  • the apparatus further includes means for determining a narrower BWP within the active BWP for a first frequency hop of a PDSCH in a first narrower BWP based on a time gap between a PDCCH scheduling the PDSCH and the PDSCH.
  • the apparatus further includes means for reporting CSI based on reception of a CSI-RS within a narrower BWP of the set of narrower BWPs based on the one or more downlink transmissions monitored in the slot.
  • the aforementioned means may be one or more of the aforementioned components of the apparatus 1102 configured to perform the functions recited by the aforementioned means.
  • the apparatus 1102 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. 12 is a flowchart 1200 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, 904; the apparatus 1302; the baseband unit 1304, which may include the memory 376 and which may be the entire base station 310 or a component of the base station 310, such as the TX processor 316, the RX processor 370, and/or the controller/processor 375) .
  • One or more of the illustrated operations may be omitted, transposed, or contemporaneous.
  • Optional aspects are illustrated with a dashed line.
  • the method may allow a base station to configure a UE to perform cross-BWP frequency hopping for the reception of downlink communication from the base station across multiple subBWPs within an active downlink BWP.
  • the base station may transmit a configuration for one or more downlink transmissions.
  • 1202 may be performed by configuration component 1340 of apparatus 1302.
  • the base station may transmit the configuration for one or more downlink transmissions to a UE.
  • the one or more downlink transmissions may be based on frequency hopping across a set of narrower BWPs.
  • the narrower BWPs may be comprised within an active BWP for the UE.
  • the base station may transmit a CSI-RS.
  • 1204 may be performed by CSI-RS component 1342 of apparatus 1302.
  • the base station may transmit the CSI-RS with a bandwidth that is based on the active BWP or a bandwidth of a serving cell.
  • the base station may receive a CSI report from the UE based on reception of the CSI-RS within a narrower BWP of the set of narrower BWPs.
  • 1206 may be performed by CSI report component 1344 of apparatus 1302.
  • the narrower BWP of the set of narrower BWPs may be based on the one or more downlink transmissions monitored in the slot.
  • the narrower BWP on which the CSI is based may be the narrower BWP in which the UE monitors for a PDCCH or an SSB or receives a PDSCH.
  • the base station may receive the CSI report from the UE based on reception of the CSI-RS in a default narrower BWP if no downlink signals or downlink channels are scheduled for the UE to receive in the slot.
  • the CSI report may include an indication that indicates the narrower BWP on which the CSI report is based. The indication may indicate the narrower BWP with an index for the narrower BWP or a starting resource block associated with the narrower BWP.
  • FIG. 13 is a diagram 1300 illustrating an example of a hardware implementation for an apparatus 1302.
  • the apparatus 1302 is a BS and includes a baseband unit 1304.
  • the baseband unit 1304 may communicate through a cellular RF transceiver with the UE 104.
  • the baseband unit 1304 may include a computer-readable medium /memory.
  • the baseband unit 1304 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 1304, causes the baseband unit 1304 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 1304 when executing software.
  • the baseband unit 1304 further includes a reception component 1330, a communication manager 1332, and a transmission component 1334.
  • the communication manager 1332 includes the one or more illustrated components.
  • the components within the communication manager 1332 may be stored in the computer-readable medium /memory and/or configured as hardware within the baseband unit 1304.
  • the baseband unit 1304 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 1332 includes a configuration component 1340 that is configured to transmit a configuration for one or more downlink transmissions, e.g., as described in connection with 1202 of FIG. 12.
  • the communication manager 1332 further includes a CSI-RS component 1342 that is configured to transmit a CSI-RS, e.g., as described in connection with 1204 of FIG. 12.
  • the communication manager 1332 further includes a CSI report component 1344 that is configured to receive a CSI report from the UE based on reception of the CSI-RS within a narrower BWP of the set of narrower BWPs, e.g., as described in connection with 1206 of FIG. 12.
  • the apparatus may include additional components that perform each of the blocks of the algorithm in the aforementioned flowchart of FIG. 12. As such, each block in the aforementioned flowchart of FIG. 12 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 1302 includes means for transmitting a configuration to a UE for one or more downlink transmissions based on frequency hopping across a set of narrower BWPs comprised within an active BWP for the UE.
  • the apparatus includes means for transmitting a CSI-RS.
  • the apparatus includes means for receiving a CSI report from the UE based on reception of the CSI-RS within a narrower BWP of the set of narrower BWPs based on the one or more downlink transmissions monitored in the slot.
  • the aforementioned means may be one or more of the aforementioned components of the apparatus 1302 configured to perform the functions recited by the aforementioned means.
  • the apparatus 1302 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.
  • 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.
  • Example 1 is a method of wireless communication at a UE comprising receiving a configuration for one or more downlink transmissions based on frequency hopping across a set of narrower BWPs comprised within an active BWP for the UE; and monitoring for the one or more downlink transmissions within a single narrower BWP during a slot.
  • Example 2 the method of Example 1 further includes that the configuration includes multiple CORESET configurations or multiple search space configurations, each CORESET configuration or search space configuration being associated with a different one of the set of narrower BWPs, and wherein the UE monitors for a PDCCH in one of set of the narrower BWPs during the slot based on at least one of: a search space type of the multiple search space configurations, a CORESET ID of the multiple CORESET configurations, or a search space ID of the multiple search space configurations.
  • Example 3 the method of Example 1 or 2 further includes that the UE monitors for the PDCCH based on a default narrower BWP if no narrower BWP is configured to be associated with a CORESET or search space.
  • Example 4 the method of any of Examples 1-3 further includes that the UE monitors for the PDCCH during the slot in a first narrower BWP associated with a CSS and skips monitoring for the PDCCH in a second narrower BWP associated with a USS during the slot.
  • Example 5 the method of any of Examples 1-4 further includes that the UE monitors for the PDCCH in a first narrower BWP associated with a smaller CORESET ID during the slot and skips monitoring for the PDCCH in a second narrower BWP associated with a larger CORESET ID during the slot.
  • Example 6 the method of any of Examples 1-5 further includes that the smaller CORESET ID and the larger CORESET ID are for a same search space type.
  • Example 7 the method of any of Examples 1-6 further includes that the UE monitors for the PDCCH in a first narrower BWP associated with a smaller search space ID during the slot and skips monitoring for the PDCCH in a second narrower BWP associated with a larger search space ID during the slot.
  • Example 8 the method of any of Examples 1-7 further includes that the smaller search space ID and the larger search space ID are for a same search space type.
  • Example 9 the method of any of Examples 1-8 further includes that the UE monitors for a PDCCH in a first narrower BWP associated with a CSS during the slot and skips monitoring for a SSB in a second narrower BWP during the slot.
  • Example 10 the method of any of Examples 1-9 further includes that the UE monitors for a SSB in a first narrower BWP during the slot and skips monitoring for a PDCCH in a second narrower BWP associated with a USS during the slot.
  • Example 11 the method of any of Examples 1-10 further includes that the UE skips monitoring for a physical downlink control channel during the slot in which a SSB has a frequency range is overlapped with two consecutive narrower BWPs of the set of narrower BWPs.
  • Example 12 the method of any of Examples 1-11 further includes receiving scheduling for a PDSCH configuration indicating an index for narrower BWP in the set of narrower BWPs and a resource allocation within the narrower BWP.
  • Example 13 the method of any of Examples 1-12 further includes receiving scheduling for a PDSCH configuration indicating a starting RB and a number of RBs within the active BWP and within a maximum UE bandwidth.
  • Example 14 the method of any of Examples 1-13 further includes that the UE monitors for a PDSCH in a first narrower BWP during the slot and skips monitoring for a PDCCH or a SSB in a second narrower BWP during the slot.
  • Example 15 the method of any of Examples 1-14 further includes determining a narrower BWP within the active BWP for a first frequency hop of a PDSCH in a first narrower BWP based on a time gap between a PDCCH scheduling the PDSCH and the PDSCH.
  • Example 16 the method of any of Examples 1-15 further includes that the UE determines the narrower BWP for the first frequency hop of the PDSCH to be a same narrower BWP in which the PDCCH is received if the time gap is less than a threshold.
  • Example 17 the method of any of Examples 1-16 further includes reporting CSI based on reception of a CSI-RS within a narrower BWP of the set of narrower BWPs based on the one or more downlink transmissions monitored in the slot.
  • Example 18 the method of any of Examples 1-17 further includes that the narrower BWP on which the CSI is based is the narrower BWP of the set of narrower BWPs in which the UE monitors for a PDCCH or a SSB or receives a PDSCH.
  • Example 19 the method of any of Examples 1-18 further includes that the UE reports the CSI based on reception of the CSI-RS in a default narrower BWP if no downlink signals or downlink channels are scheduled for the UE to receive in the slot.
  • Example 20 the method of any of Examples 1-19 further includes that a bandwidth of the CSI-RS is within the active BWP or with a serving cell bandwidth.
  • Example 21 the method of any of Examples 1-20 further includes that the UE indicates the narrower BWP when reporting the CSI.
  • Example 22 the method of any of Examples 1-21 further includes that the UE indicates the narrower BWP with an index for the narrower BWP or a starting resource block associated with the narrower BWP.
  • Example 23 is a device including one or more processors and one or more memories in electronic communication with the one or more processors storing instructions executable by the one or more processors to cause the system or apparatus to implement a method as in any of Examples 1-22.
  • Example 24 is a system or apparatus including means for implementing a method or realizing an apparatus as in any of Examples 1-22.
  • Example 25 is a non-transitory computer readable medium storing instructions executable by one or more processors to cause the one or more processors to implement a method as in any of Examples 1-20.
  • Example 26 is a method of wireless communication at a base station comprising transmitting a configuration to a UE for one or more downlink transmissions based on frequency hopping across a set of narrower BWPs comprised within an active BWP for the UE; transmitting a CSI-RS; and receiving a CSI report from the UE based on reception of the CSI-RS within a narrower BWP of the set of narrower BWPs based on the one or more downlink transmissions monitored in a slot.
  • Example 27 the method of Example 26 further includes that the narrower BWP on which the CSI is based is the narrower BWP in which the UE monitors for a PDCCH or a SSB or receives a PDSCH.
  • Example 28 the method of Example 26 or 27 further includes that the base station receives the CSI report from the UE based on reception of the CSI-RS in a default narrower BWP if no downlink signals or downlink channels are scheduled for the UE to receive in the slot.
  • Example 29 the method of any of Examples 26-28 further includes that the base station transmits the CSI-RS with a bandwidth that is based on the active BWP or a serving cell bandwidth.
  • Example 30 the method of any of Examples 26-29 further includes that the CSI report includes an indication that indicates the narrower BWP on which the CSI report is based.
  • Example 31 the method of any of Examples 26-30 further includes that the indication indicates the narrower BWP with an index for the narrower BWP or a starting resource block associated with the narrower BWP.
  • Example 32 is a device including one or more processors and one or more memories in electronic communication with the one or more processors storing instructions executable by the one or more processors to cause the system or apparatus to implement a method as in any of Examples 26-31.
  • Example 33 is a system or apparatus including means for implementing a method or realizing an apparatus as in any of Examples 26-31.
  • Example 34 is a non-transitory computer readable medium storing instructions executable by one or more processors to cause the one or more processors to implement a method as in any of Examples 26-31.

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

Abstract

L'invention concerne un procédé, un support lisible par ordinateur et un appareil. Un UE reçoit une configuration d'une ou plusieurs transmissions en liaison descendante sur la base d'un saut de fréquence à travers un ensemble de parties à largeur de bande (BWPs) plus étroites comprises dans une BWP active pour l'UE. L'UE surveille la ou les transmissions en liaison descendante dans une seule BWP plus étroite (par exemple, une sous-BWP). Une station de base transmet une configuration à un UE pour une ou plusieurs transmissions en liaison descendante sur la base d'un saut de fréquence à travers un ensemble de BWPs plus étroites comprises dans une BWP active pour l'UE. La station de base transmet un CSI-RS et reçoit un rapport de CSI en provenance de l'UE sur la base de la réception du CSI-RS à l'intérieur d'une BWP plus étroite de l'ensemble de BWPs plus étroites sur la base de ladite ou desdites transmissions en liaison descendante surveillées dans l'intervalle de temps.
PCT/CN2020/105874 2020-07-30 2020-07-30 Communication en liaison descendante à largeur de bande limitée pour un saut de fréquence de sous-bwp WO2022021223A1 (fr)

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