WO2021212350A1 - Technique d'indication de partie de bande passante pour signaux de référence d'informations d'état de canal à puissance non nulle dans un système de communication sans fil - Google Patents

Technique d'indication de partie de bande passante pour signaux de référence d'informations d'état de canal à puissance non nulle dans un système de communication sans fil Download PDF

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Publication number
WO2021212350A1
WO2021212350A1 PCT/CN2020/086023 CN2020086023W WO2021212350A1 WO 2021212350 A1 WO2021212350 A1 WO 2021212350A1 CN 2020086023 W CN2020086023 W CN 2020086023W WO 2021212350 A1 WO2021212350 A1 WO 2021212350A1
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WO
WIPO (PCT)
Prior art keywords
bwp
resource
nzp csi
csi
determining
Prior art date
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PCT/CN2020/086023
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English (en)
Inventor
Fang Yuan
Yan Zhou
Yu Zhang
Ruiming Zheng
Linhai He
Tao Luo
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Qualcomm Incorporated
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Publication date
Application filed by Qualcomm Incorporated filed Critical Qualcomm Incorporated
Priority to PCT/CN2020/086023 priority Critical patent/WO2021212350A1/fr
Publication of WO2021212350A1 publication Critical patent/WO2021212350A1/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
    • H04L5/0091—Signaling for the administration of the divided path
    • H04L5/0092—Indication of how the channel is divided
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—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

Definitions

  • aspects of the present disclosure relate generally to wireless communication systems, and more particularly, to bandwidth part (BWP) indication for non-zero power (NZP) channel state information-reference signal (CSI-RS) .
  • BWP bandwidth part
  • NZP non-zero power
  • CSI-RS channel state information-reference signal
  • Wireless communication systems are widely deployed to provide various types of communication content such as voice, video, packet data, messaging, broadcast, and so on. These systems may be multiple-access systems capable of supporting communication with multiple users by sharing the available system resources (e.g., time, frequency, and power) . Examples of such multiple-access systems include code-division multiple access (CDMA) systems, time-division multiple access (TDMA) systems, frequency-division multiple access (FDMA) systems, and orthogonal frequency-division multiple access (OFDMA) systems, and single-carrier frequency division multiple access (SC-FDMA) 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
  • 5G communications technology can include: enhanced mobile broadband addressing human-centric use cases for access to multimedia content, services and data; ultra-reliable-low latency communications (URLLC) with certain specifications for latency and reliability; and massive machine type communications, which can allow a very large number of connected devices and transmission of a relatively low volume of non-delay-sensitive information.
  • URLLC ultra-reliable-low latency communications
  • An example implementation includes a method of wireless communication at a user equipment (UE) , including receiving a configuration of a non-zero power (NZP) channel state information-reference signal (CSI-RS) resource as a source reference resource signal (RS) for a target signal; determining a bandwidth part (BWP) associated with the NZP CSI-RS resource based on a BWP identification rule; and communicating on the BWP associated with the NZP CSI-RS resource.
  • NZP non-zero power
  • CSI-RS channel state information-reference signal
  • Another example implementation includes a method of wireless communication at a network entity, including determining a configuration of a NZP CSI-RS resource as a source reference RS for a target signal; transmitting the configuration of the NZP CSI-RS resource as the source RS for the target signal; determining a BWP associated with the NZP CSI-RS resource based on a BWP identification rule; and communicating on the BWP associated with the NZP CSI-RS resource.
  • an apparatus for wireless communication includes a transceiver, a memory configured to store instructions, and one or more processors communicatively coupled with the transceiver and the memory. The one or more processors are configured to execute the instructions to perform the operations of the methods described herein.
  • an apparatus for wireless communication is provided that includes means for performing the operations of methods described herein.
  • a non-transitory computer-readable medium is provided including code executable by one or more processors to perform the operations of the methods described herein.
  • 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 schematic diagram of an example of a wireless communication system, in accordance with various aspects of the present disclosure
  • FIG. 2 is a block diagram of an example of a network entity in accordance with various aspects of the present disclosure
  • FIG. 3 is a block diagram of an example of a user equipment (UE) , in accordance with various aspects of the present disclosure
  • FIG. 4 is a graph of frequency over time including an example of bandwidth parts (BWPs) , one or more of which may be configured with a non-zero power (NZP) channel state information-reference signal (CSI-RS) resource (s) ;
  • BWPs bandwidth parts
  • NZP non-zero power
  • CSI-RS channel state information-reference signal
  • FIG. 5 is a block diagram of an example of CSI-Resource configurations (CSI-ResourceConfigs) each having a same NZP CSI-RS resource identification (ID) ;
  • FIG. 6 is a flowchart of an example method of wireless communication, and more specifically, BWP indication for NZP CSI-RS at a user equipment (UE) ;
  • FIG. 7 is a flowchart of an example method of wireless communication, and more specifically, BWP indication for NZP CSI-RS at a network entity;
  • FIG. 8 is a block diagram illustrating an example of a MIMO communication system including a base station and a UE, in accordance with various aspects of the present disclosure.
  • the described features generally relate to bandwidth part (BWP) indication for non-zero power (NZP) channel state information-reference signal (CSI-RS) .
  • NZP non-zero power
  • CSI-RS channel state information-reference signal
  • BWP bandwidth part
  • CSI-ResourceConfigs CSI-ResourceConfigs, or CSI-Resource settings
  • ID BWP identification
  • a NZP CSI-RS resource ID may be defined across multiple BWPs per cell, but not defined per BWP. Accordingly, each NZP CSI-RS resource location may be defined in a common resource block (CRB) , but not in a particular BWP.
  • CRB common resource block
  • the present disclosure provides several techniques for BWP indication of NZP-CSI-RS as a resource reference to a target signal/channel.
  • a default BWP is designed and clarified.
  • the present disclosure includes a method, apparatus, and non-transitory computer readable medium for wireless communication at a user equipment (UE) for receiving a configuration of a NZP CSI-RS resource as a source reference RS for a target signal, determining a BWP associated with the NZP CSI-RS resource based on a BWP identification rule, and communicating on the BWP associated with the NZP CSI-RS resource.
  • UE user equipment
  • the BWP associated with the NZP CSI-RS resource is determined as: the unique BWP identified in the first CSI-resource configuration, such as in the case where there is a first radio resource control (RRC) signaling that is referenced by a second RRC signaling; a default BWP, where no BWP identifier is signaled, which reduces overhead; or an explicitly configured BWP in the source reference RS, which is a NZP-CSI-RS.
  • RRC radio resource control
  • the present disclosure includes a method, apparatus, and non-transitory computer readable medium for wireless communication at a base station for determining a configuration of a NZP CSI-RS resource as a source reference RS for a target signal, transmitting the configuration of the NZP CSI-RS resource as the source RS for the target signal, determining a BWP associated with the NZP CSI-RS resource based on a BWP identification rule, and communicating on the BWP associated with the NZP CSI-RS resource.
  • a component may be, but is not limited to being, a process running on a processor, a processor, an object, an executable, a thread of execution, a program, and/or a computer.
  • a component may be, but is not limited to being, a process running on a processor, a processor, an object, an executable, a thread of execution, a program, and/or a computer.
  • an application running on a computing device and the computing device can be a component.
  • One or more components can reside within a process and/or thread of execution and a component can be localized on one computer and/or distributed between two or more computers.
  • these components can execute from various computer readable media having various data structures stored thereon.
  • the components can communicate by way of local and/or remote processes such as in accordance with a signal having one or more data packets, such as data from one component interacting with another component in a local system, distributed system, and/or across a network such as the Internet with other systems by way of the signal.
  • Software shall be construed broadly to mean instructions, instruction sets, code, code segments, program code, programs, subprograms, software modules, 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.
  • a CDMA system may implement a radio technology such as CDMA2000, Universal Terrestrial Radio Access (UTRA) , etc.
  • CDMA2000 covers IS-2000, IS-95, and IS-856 standards.
  • IS-2000 Releases 0 and A are commonly referred to as CDMA2000 1X, 1X, etc.
  • IS-856 (TIA-856) is commonly referred to as CDMA2000 1xEV-DO, High Rate Packet Data (HRPD) , etc.
  • UTRA includes Wideband CDMA (WCDMA) and other variants of CDMA.
  • a TDMA system may implement a radio technology such as Global System for Mobile Communications (GSM) .
  • GSM Global System for Mobile Communications
  • An OFDMA system may implement a radio technology such as Ultra Mobile Broadband (UMB) , Evolved UTRA (E-UTRA) , IEEE 802.11 (Wi-Fi) , IEEE 802.16 (WiMAX) , IEEE 802.20, Flash-OFDM TM , etc.
  • UMB Ultra Mobile Broadband
  • E-UTRA Evolved UTRA
  • Wi-Fi Wi-Fi
  • WiMAX IEEE 802.16
  • IEEE 802.20 Flash-OFDM TM
  • UTRA and E-UTRA are part of Universal Mobile Telecommunication System (UMTS) .
  • 3GPP Long Term Evolution (LTE) and LTE-Advanced (LTE-A) are new releases of UMTS that use E-UTRA.
  • UTRA, E-UTRA, UMTS, LTE, LTE-A, and GSM are described in documents from an organization named “3rd Generation Partnership Project” (3GPP) .
  • CDMA2000 and UMB are described in documents from an organization named “3rd Generation Partnership Project 2” (3GPP2) .
  • the techniques described herein may be used for the systems and radio technologies mentioned above as well as other systems and radio technologies, including cellular (e.g., LTE) communications over a shared radio frequency spectrum band.
  • LTE/LTE-A system for purposes of example, and LTE terminology is used in much of the description below, although the techniques are applicable beyond LTE/LTE-A applications (e.g., to fifth generation (5G) NR networks or other next generation communication systems) .
  • 5G fifth generation
  • an example of a wireless communications system and an access network 100 can include base stations 102, UEs 104, an Evolved Packet Core (EPC) 160, and/or a 5G Core (5GC) 190.
  • the base stations 102 which may also be referred to as network entities, may include macro cells (high power cellular base station) and/or small cells (low power cellular base station) .
  • the macro cells can include base stations.
  • the small cells can include femtocells, picocells, and microcells.
  • the base stations 102 may also include gNBs 180, as described further herein.
  • some nodes such as base station 102/gNB 180, may have a modem 240 and a communicating component 242, as described herein.
  • a base station 102/gNB 180 is shown as having the modem 240 and a communicating component 242, this is one illustrative example, and substantially any node may include a modem 240 and communicating component 242 for providing corresponding functionalities described herein.
  • base station 102/gNB 180 and/or communicating component 242 may determine a configuration of a NZP CSI-RS resource as a source reference RS for a target signal, transmit the configuration of the NZP CSI-RS resource as the source RS for the target signal, determine a BWP associated with the NZP CSI-RS resource based on a BWP identification rule, and communicate on the BWP associated with the NZP CSI-RS resource.
  • some nodes such as UE 104 of the wireless communication system may have a modem 340 and communicating component 342 for receiving a configuration of a NZP CSI-RS resource as a source reference RS for a target signal, determining a BWP associated with the NZP CSI-RS resource based on a BWP identification rule, and communicating on the BWP associated with the NZP CSI-RS resource, as described herein.
  • a UE 104 is shown as having the modem 340 and communicating component 342, this is one illustrative example, and substantially any node or type of node may include a modem 340 and communicating component 342 for providing corresponding functionalities described herein.
  • a unique downlink (DL) BWP may be configured in all of the CSI-ResourceConfigs.
  • the default DL BWP associated with the NZP CSI-RS resource is the unique BWP in the CSI-ResourceConfigs.
  • a UE 104 may be configured with multiple CSI-ResourceConfigs including a same NZP CSI-RS resource ID, and when the NZP CSI-RS resource is used as the source reference RS and the BWP is not indicated, then the default DL BWP associated with the NZP CSI-RS resource may correspond to one of the following: an active BWP in the serving cell located by the NZP CSI-RS; a default or initial downlink BWP in the serving cell located by the NZP CSI-RS; a BWP with the lowest or highest ID in the serving cell located by the NZP CSI-RS; and a BWP configured in a lowest or highest CSI-ResourceConfig ID located by the NZP CSI-RS.
  • the BWP associated with the NZP CSI-RS resource may be explicitly indicated in the configuration for at least one of the pathloss RS for physical uplink control channel (PUCCH) or sounding reference signal (SRS) , a pathloss RS for a physical uplink shared channel (PUSCH) , a spatial relation information for PUCCH, a spatial relation information for SRS, a radio link monitoring (RLM) RS, or a new beam RS for beam failure recovery (BFR) .
  • PUCCH physical uplink control channel
  • SRS sounding reference signal
  • PUSCH physical uplink shared channel
  • RLM radio link monitoring
  • BFR new beam RS for beam failure recovery
  • the base stations 102 configured for 4G LTE (which can collectively be referred to as Evolved Universal Mobile Telecommunications System (UMTS) Terrestrial Radio Access Network (E-UTRAN) ) may interface with the EPC 160 through backhaul links 132 (e.g., using an S1 interface) .
  • the base stations 102 configured for 5G NR (which can collectively be referred to as Next Generation RAN (NG-RAN) ) may interface with 5GC 190 through backhaul links 184.
  • NG-RAN Next Generation RAN
  • 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 5GC 190) with each other over backhaul links 134 (e.g., using an X2 interface) .
  • the backhaul links 132, 134 and/or 184 may be wired or wireless.
  • the base stations 102 may wirelessly communicate with one or more 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 macro cells may be referred to as a heterogeneous network.
  • a heterogeneous network may also include Home Evolved Node Bs (eNBs) (HeNBs) , which may provide service to a restricted group, which can be referred to 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 an eNB, gNodeB (gNB) , or other 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 millimeter wave
  • mmW base station Extremely high frequency (EHF) is part of the RF in the electromagnetic spectrum. EHF has a range of 30 GHz to 300 GHz and a wavelength between 1 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 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.
  • a base station 102 referred to herein can include a gNB 180.
  • 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 5GC 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 can be a control node that processes the signaling between the UEs 104 and the 5GC 190.
  • the AMF 192 can provide QoS flow and session management.
  • User Internet protocol (IP) packets (e.g., from one or more UEs 104) can be transferred through the UPF 195.
  • the UPF 195 can provide UE IP address allocation for one or more UEs, 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.
  • the base station may also be referred to as a gNB, Node B, evolved 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 5GC 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 positioning system (e.g., satellite, terrestrial) , a multimedia device, a video device, a digital audio player (e.g., MP3 player) , a camera, a game console, a tablet, a smart device, robots, drones, an industrial/manufacturing device, a wearable device (e.g., a smart watch, smart clothing, smart glasses, virtual reality goggles, a smart wristband, smart jewelry (e.g., a smart ring, a smart bracelet) ) , a vehicle/avehicular device, a meter (e.g., parking meter, electric meter, gas meter, water meter, flow meter) , a gas pump, a large or small kitchen appliance, a medical/healthcare device, an implant, a sensor
  • IoT devices e.g., meters, pumps, monitors, cameras, industrial/manufacturing devices, appliances, vehicles, robots, drones, etc.
  • IoT UEs may include MTC/enhanced MTC (eMTC, also referred to as CAT-M, Cat M1) UEs, NB-IoT (also referred to as CAT NB1) UEs, as well as other types of UEs.
  • eMTC and NB-IoT may refer to future technologies that may evolve from or may be based on these technologies.
  • eMTC may include FeMTC (further eMTC) , eFeMTC (enhanced further eMTC) , mMTC (massive MTC) , etc.
  • NB-IoT may include eNB-IoT (enhanced NB-IoT) , FeNB-IoT (further enhanced NB-IoT) , 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.
  • FIGS. 2-8 aspects are depicted with reference to one or more components and one or more methods that may perform the actions or operations described herein, where aspects in dashed line may be optional.
  • FIGs. 6 and 7 the operations described below in FIGs. 6 and 7 is presented in a particular order and/or as being performed by an example component, it should be understood that the ordering of the actions and the components performing the actions may be varied, depending on the implementation.
  • the following actions, functions, and/or described components may be performed by a specially-programmed processor, a processor executing specially-programmed software or computer-readable media, or by any other combination of a hardware component and/or a software component capable of performing the described actions or functions.
  • base station 102 may include a variety of components, some of which have already been described above and are described further herein, including components such as one or more processors 212 and memory 216 and transceiver 202 in communication via one or more buses 244, which may operate in conjunction with modem 240 and/or communicating component 242 for performing BWP indication for NZP-CSI RS as described herein.
  • the one or more processors 212 can include a modem 240 and/or can be part of the modem 240 that uses one or more modem processors.
  • the various functions related to communicating component 242 may be included in modem 240 and/or processors 212 and, in an aspect, can be executed by a single processor, while in other aspects, different ones of the functions may be executed by a combination of two or more different processors.
  • the one or more processors 212 may include any one or any combination of a modem processor, or a baseband processor, or a digital signal processor, or a transmit processor, or a receiver processor, or a transceiver processor associated with transceiver 202. In other aspects, some of the features of the one or more processors 212 and/or modem 240 associated with communicating component 242 may be performed by transceiver 202.
  • memory 216 may be configured to store data used herein and/or local versions of applications 275 or communicating component 242 and/or one or more of its subcomponents being executed by at least one processor 212.
  • Memory 216 can include any type of computer-readable medium usable by a computer or at least one processor 212, such as random access memory (RAM) , read only memory (ROM) , tapes, magnetic discs, optical discs, volatile memory, non-volatile memory, and any combination thereof.
  • RAM random access memory
  • ROM read only memory
  • tapes such as magnetic discs, optical discs, volatile memory, non-volatile memory, and any combination thereof.
  • memory 216 may be a non-transitory computer-readable storage medium that stores one or more computer-executable codes defining communicating component 242 and/or one or more of its subcomponents, and/or data associated therewith, when base station 102 is operating at least one processor 212 to execute communicating component 242 and/or one or more of its subcomponents.
  • Transceiver 202 may include at least one receiver 206 and at least one transmitter 208.
  • Receiver 206 may include hardware and/or software executable by a processor for receiving data, the code comprising instructions and being stored in a memory (e.g., computer-readable medium) .
  • Receiver 206 may be, for example, a radio frequency (RF) receiver.
  • RF radio frequency
  • receiver 206 may receive signals transmitted by at least one base station 102. Additionally, receiver 206 may process such received signals, and also may obtain measurements of the signals, such as, but not limited to, Ec/Io, signal-to-noise ratio (SNR) , reference signal received power (RSRP) , received signal strength indicator (RSSI) , etc.
  • SNR signal-to-noise ratio
  • RSRP reference signal received power
  • RSSI received signal strength indicator
  • Transmitter 208 may include hardware and/or software executable by a processor for transmitting data, the code comprising instructions and being stored in a memory (e.g., computer-readable medium) .
  • a suitable example of transmitter 208 may including, but is not limited to, an RF transmitter.
  • base station 102 may include RF front end 288, which may operate in communication with one or more antennas 265 and transceiver 202 for receiving and transmitting radio transmissions, for example, wireless communications transmitted by at least one base station 102 or wireless transmissions transmitted by UE 104.
  • RF front end 288 may be connected to one or more antennas 265 and can include one or more low-noise amplifiers (LNAs) 290, one or more switches 292, one or more power amplifiers (PAs) 298, and one or more filters 296 for transmitting and receiving RF signals.
  • the antennas 265 may include one or more antennas, antenna elements, and/or antenna arrays.
  • LNA 290 can amplify a received signal at a desired output level.
  • each LNA 290 may have a specified minimum and maximum gain values.
  • RF front end 288 may use one or more switches 292 to select a particular LNA 290 and its specified gain value based on a desired gain value for a particular application.
  • one or more PA (s) 298 may be used by RF front end 288 to amplify a signal for an RF output at a desired output power level.
  • each PA 298 may have specified minimum and maximum gain values.
  • RF front end 288 may use one or more switches 292 to select a particular PA 298 and its specified gain value based on a desired gain value for a particular application.
  • one or more filters 296 can be used by RF front end 288 to filter a received signal to obtain an input RF signal.
  • a respective filter 296 can be used to filter an output from a respective PA 298 to produce an output signal for transmission.
  • each filter 296 can be connected to a specific LNA 290 and/or PA 298.
  • RF front end 288 can use one or more switches 292 to select a transmit or receive path using a specified filter 296, LNA 290, and/or PA 298, based on a configuration as specified by transceiver 202 and/or processor 212.
  • transceiver 202 may be configured to transmit and receive wireless signals through one or more antennas 265 via RF front end 288.
  • transceiver may be tuned to operate at specified frequencies such that UE 104 can communicate with, for example, one or more base stations 102 or one or more cells associated with one or more base stations 102.
  • modem 240 can configure transceiver 202 to operate at a specified frequency and power level based on the UE configuration of the UE 104 and the communication protocol used by modem 240.
  • modem 240 can be a multiband-multimode modem, which can process digital data and communicate with transceiver 202 such that the digital data is sent and received using transceiver 202.
  • modem 240 can be multiband and be configured to support multiple frequency bands for a specific communications protocol.
  • modem 240 can be multimode and be configured to support multiple operating networks and communications protocols.
  • modem 240 can control one or more components of UE 104 (e.g., RF front end 288, transceiver 202) to enable transmission and/or reception of signals from the network based on a specified modem configuration.
  • the modem configuration can be based on the mode of the modem and the frequency band in use.
  • the modem configuration can be based on UE configuration information associated with UE 104 as provided by the network during cell selection and/or cell reselection.
  • the processor (s) 212 may correspond to one or more of the processors described in connection with the base station in FIG. 7.
  • the memory 216 may correspond to the memory described in connection with the base station in FIG. 7.
  • one example of an implementation of UE 104 may include a variety of components, some of which have already been described above and are described further herein, including components such as one or more processors 312 and memory 316 and transceiver 302 in communication via one or more buses 344, which may operate in conjunction with modem 340 for receiving a BWP indication for NZP-CSI RS as described herein.
  • the transceiver 302, receiver 306, transmitter 308, one or more processors 312, memory 316, applications 375, buses 344, RF front end 388, LNAs 390, switches 392, filters 396, PAs 398, and one or more antennas 365 may be the same as or similar to the corresponding components of base station 102, as described above, but configured or otherwise programmed for base station operations as opposed to base station operations.
  • the processor (s) 312 may correspond to one or more of the processors described in connection with the UE in FIG. 6.
  • the memory 316 may correspond to the memory described in connection with the UE in FIG. 6.
  • graph 400 includes an example of BWPs one or more of which may be configured with NZP CSI-RS resources.
  • graph 400 depicts BWP 1 , BWP 2 , and BWP 3 across various instances of time and at varying frequencies.
  • BWP 1 has a set of RBs that have a width of 40 MHz and a subcarrier spacing of 15 kHz.
  • BWP 2 has a set of RBs that have a width of 10 MHz and a subcarrier spacing of 15 kHz.
  • BWP 3 has a set of RBs that have a width of 20 MHz and a subcarrier spacing of 60 kHz.
  • a NZP CSI-RS may be associated with one of BWP 1 , BWP 2 , or BWP 3 according to the techniques described herein.
  • the configured CSI resources 402 may be defined by a starting RB and a number of RBs by the indication of CSI-FrequencyOccupation.
  • the configured CSI resources 402 for the NZP CSI-RS may be greater than a frequency width of RBs in the BWP. In such a case, if the configured value is larger than the width of the corresponding BWP, the UE shall assume that the actual CSI-RS bandwidth 404 is equal to the width of the BWP (as illustrated with respect to BWP 2 ) .
  • diagram 500 includes an example of first and second CSI-ResourceConfigs 502 and 504 each having a same NZP CSI-RS resource ID.
  • CSI-ResoueceConfig0 502 may include a NZP CSI-RS set0 with a corresponding NZP CSI-RS ID0, and BWP ID0.
  • CSI-ResoueceConfig1 504 may include a NZP CSI-RS set1 with a corresponding NZP CSI-RS ID1, and BWP ID1.
  • BWP ID0 may be equal to BWP ID1 .
  • This first example may represent an implementation where a unique DL bandwidth-part (BWP) shall be configured in all the CSI-ResourceConfigs, and the UE 104 implements a BWP identification rule that identifies the default DL BWP associated with the NZP CSI-RS resource as the unique BWP in the CSI-ResourceConfigs.
  • BWP unique DL bandwidth-part
  • BWP ID0 may not be equal to BWP ID1, and as such, the BWP ID may be different for each CSIResourceConfig
  • This second example may represent an implementation where the NZP CSI-RS resource is used as the source reference RS and the BWP is not indicated, and the UE 104 implements a BWP identification rule that identifies the default DL BWP associated with the NZP CSI-RS resource as corresponding to one of the following: an active BWP in the serving cell located by the NZP CSI-RS; a default or initial downlink BWP in the serving cell located by the NZP CSI-RS; a BWP with the lowest or highest ID in the serving cell located by the NZP CSI-RS; and a BWP configured in a lowest or highest CSI-ResourceConfig ID located by the NZP CSI-RS.
  • an example of a method 600 for wireless communication at a UE can be performed using one or more of the components of UE 104 described in FIGS. 1, 2, 3, and 8.
  • the method 600 includes receiving a configuration of a NZP CSI-RS resource as a source reference RS for a target signal.
  • the communicating component 342 e.g., in conjunction with processor (s) 312, memory 316, and/or transceiver 302, may be configured to receive a configuration of a NZP CSI-RS resource as a source reference RS for a target signal.
  • the UE 104, the processor (s) 312, the communicating component 342 may define the means for receiving a configuration of a NZP CSI-RS resource as a source reference RS for a target signal.
  • the UE 104 may receive via its antenna, transceiver, and/or modem, a wireless signal from the base station 102, such as a radio resource control (RRC) message, that includes the configuration that defines the NZP CSI-RS resource as the source reference RS for a target signal.
  • RRC radio resource control
  • the method 600 includes determining a BWP associated with the NZP CSI-RS resource based on a BWP identification rule.
  • the communicating component 342 e.g., in conjunction with processor (s) 312, memory 316, and/or transceiver 302, may be configured to determine a BWP associated with the NZP CSI-RS resource based on a BWP identification rule.
  • the UE 104, the processor (s) 312, the communicating component 342 may define the means for determining a BWP associated with the NZP CSI-RS resource based on a BWP identification rule.
  • the UE 104 may implement the BWP identification rule to determine that the BWP is the unique BWP ID indicated in the CSI resource configuration, as a default BWP ID based on the BWP not being indicated, e.g., to conserve overhead, or as the configured BWP in the source reference signal RS, which is a NZP-CSI-RS.
  • the method 600 includes communicating on the BWP associated with the NZP CSI-RS resource.
  • the communicating component 342 e.g., in conjunction with processor (s) 312, memory 316, and/or transceiver 302, may be configured to communicate on the BWP associated with the NZP CSI-RS resource.
  • the UE 104, the processor (s) 312, the communicating component 342 may define the means for communicating on the BWP associated with the NZP CSI-RS resource.
  • the UE 104 may utilize the indicated BWP resources and perform various communication-related functions relating to the NZP CSI-RS being served as a resource reference to a target signal/channel, such as for pathloss RS, spatial relation info, etc.
  • receiving the configuration of the NZP CSI-RS resource further comprises receiving a plurality of CSI-ResourceConfigs each having a same NZP CSI-RS resource ID.
  • a unique DL BWP is configured for each of the plurality CSI-ResourceConfigs
  • determining the BWP associated with the NZP CSI-RS resource comprises determining, according to the BWP identification rule, a default DL BWP associated with a NZP CSI-RS resource ID corresponding to the unique DL BWP for each of the plurality of CSI-ResourceConfigs.
  • determining the BWP associated with the NZP CSI-RS resource comprises determining that the BWP is not indicated, and determining, according to the BWP identification rule, a default DL BWP associated with the NZP CSI-RS resource.
  • the default DL BWP corresponds to an active BWP in a serving cell associated with a location of the NZP CSI-RS resource.
  • the default DL BWP corresponds to an initial BWP in a serving cell associated with a location of the NZP CSI-RS resource.
  • the default DL BWP corresponds to a BWP with at least one BWP ID in a serving cell associated with a location of the NZP CSI-RS resource.
  • the default DL BWP corresponds to a BWP configured in at least one CSI-ResourceConfig ID associated with a location of the NZP CSI-RS resource.
  • determining the BWP associated with the NZP CSI-RS resource includes using an explicitly indicated BWP in a configuration for the target signal at least including one of a pathloss RS for PUCCH, a pathloss RS for a SRS, a pathloss RS for a PUSCH, a spatial relation information for PUCCH, a spatial relation information for SRS, a radio link monitoring (RLM) RS, or a new beam RS for BFR.
  • a pathloss RS for PUCCH a pathloss RS for a SRS
  • a pathloss RS for a PUSCH a spatial relation information for PUCCH
  • RLM radio link monitoring
  • a configuration of PUCCH pathloss RS may correspond to:
  • a configuration of the spatial relation information for PUCCH may correspond to:
  • a configuration of the pathloss RS for PUSCH may correspond to:
  • a configuration of the RLM RS may correspond to:
  • a configuration of the new beam RS for BFR may correspond to:
  • an example of a method 700 for wireless communication at a base station can be performed using one or more of the components of base station 102 described in FIGS. 1, 2, 3, and 8.
  • the method 700 includes determining a configuration of a NZP CSI-RS resource as a source reference RS for a target signal.
  • the communicating component 242 e.g., in conjunction with processor (s) 212, memory 216, and/or transceiver 202, may be configured to determine a configuration of a NZP CSI-RS resource as a source reference RS for a target signal.
  • the bases station 102, the processor (s) 212, the communicating component 242 may define the means for determining a configuration of a NZP CSI-RS resource as a source reference RS for a target signal.
  • the method 700 includes transmitting the configuration of the NZP CSI-RS resource as the source RS for the target signal.
  • the communicating component 242 e.g., in conjunction with processor (s) 212, memory 216, and/or transceiver 202, may be configured to transmit the configuration of the NZP CSI-RS resource as the source RS for the target signal.
  • the bases station 102, the processor (s) 212, the communicating component 242 may define the means for transmitting the configuration of the NZP CSI-RS resource as the source RS for the target signal.
  • the method 700 includes determining a BWP associated with the NZP CSI-RS resource based on a BWP identification rule.
  • the communicating component 242 e.g., in conjunction with processor (s) 212, memory 216, and/or transceiver 202, may be configured to determine a BWP associated with the NZP CSI-RS resource based on a BWP identification rule.
  • the bases station 102, the processor (s) 212, the communicating component 242 may define the means for determining a BWP associated with the NZP CSI-RS resource based on a BWP identification rule.
  • the method 700 includes communicating on the BWP associated with the NZP CSI-RS resource.
  • the communicating component 242 e.g., in conjunction with processor (s) 212, memory 216, and/or transceiver 202, may be configured to communicate on the BWP associated with the NZP CSI-RS resource.
  • the bases station 102, the processor (s) 212, the communicating component 242 may define the means for communicating on the BWP associated with the NZP CSI-RS resource.
  • transmitting the configuration of the NZP CSI-RS resource further comprises transmitting a plurality of CSI-ResourceConfigs each having a same NZP CSI-RS resource ID.
  • determining the BWP associated with the NZP CSI-RS resource comprises: determining that the BWP is not indicated, and determining, according to the BWP identification rule, a default DL BWP associated with the NZP CSI-RS resource.
  • determining the BWP associated with the NZP CSI-RS resource includes using an explicitly indicated BWP in a configuration for at least one of a pathloss RS for PUCCH, a pathloss RS for a SRS, a pathloss RS for a PUSCH, a spatial relation information for PUCCH, a spatial relation information for SRS, a RLM RS, or a new beam RS for BFR.
  • an example of a MIMO communication system 800 includes base station 102, which may be acting as an IAB node or a parent node, and UE 104.
  • the base station 102 and UE 104 may be the same as described above, and may include additional components as described with reference to FIG. 8.
  • the MIMO communication system 800 may illustrate an aspect of the wireless communication access network 100 described with reference to FIG. 1.
  • the base station 102 may be equipped with antennas 834 and 835, and the UE 104 may be equipped with antennas 852 and 853.
  • the base station 102 may be able to send data over multiple communication links at the same time.
  • Each communication link may be called a “layer” and the “rank” of the communication link may indicate the number of layers used for communication. For example, in a 2x2 MIMO communication system where base station 102 transmits two “layers, ” the rank of the communication link between the base station 102 and the UE 104 is two.
  • a transmit (Tx) processor 820 may receive data from a data source.
  • the transmit processor 820 may process the data.
  • the transmit processor 820 may also generate control symbols or reference symbols.
  • a transmit MIMO processor 830 may perform spatial processing (e.g., precoding) on data symbols, control symbols, or reference symbols, if applicable, and may provide output symbol streams to the transmit modulator/demodulators 832 and 833.
  • Each modulator/demodulator 832 through 833 may process a respective output symbol stream (e.g., for OFDM, etc. ) to obtain an output sample stream.
  • Each modulator/demodulator 832 through 833 may further process (e.g., convert to analog, amplify, filter, and upconvert) the output sample stream to obtain a DL signal.
  • DL signals from modulator/demodulators 832 and 833 may be transmitted via the antennas 834 and 835, respectively.
  • the UE antennas 852 and 853 may receive the DL signals from the base station 102 and may provide the received signals to the modulator/demodulators 854 and 855, respectively.
  • Each modulator/demodulator 854 through 855 may condition (e.g., filter, amplify, downconvert, and digitize) a respective received signal to obtain input samples.
  • Each modulator/demodulator 854 through 855 may further process the input samples (e.g., for OFDM, etc. ) to obtain received symbols.
  • a MIMO detector 856 may obtain received symbols from the modulator/demodulators 854 and 855, perform MIMO detection on the received symbols, if applicable, and provide detected symbols.
  • a receive (Rx) processor 858 may process (e.g., demodulate, deinterleave, and decode) the detected symbols, providing decoded data for the UE 104 to a data output, and provide decoded control information to a processor 880, or memory 882.
  • the processor 880 may in some cases execute stored instructions to instantiate a communicating component 242 (see e.g., FIGS. 1 and 2) .
  • a transmit processor 864 may receive and process data from a data source.
  • the transmit processor 864 may also generate reference symbols for a reference signal.
  • the symbols from the transmit processor 864 may be precoded by a transmit MIMO processor 866 if applicable, further processed by the modulator/demodulators 854 and 855 (e.g., for SC-FDMA, etc. ) , and be transmitted to the base station 102 in accordance with the communication parameters received from the base station 102.
  • the UL signals from the UE 84 may be received by the antennas 834 and 835, processed by the modulator/demodulators 832 and 833, detected by a MIMO detector 836 if applicable, and further processed by a receive processor 838.
  • the receive processor 838 may provide decoded data to a data output and to the processor 840 or memory 842.
  • the components of the UE 104 may, individually or collectively, be implemented with one or more ASICs adapted to perform some or all of the applicable functions in hardware.
  • Each of the noted modules may be a means for performing one or more functions related to operation of the MIMO communication system 1000.
  • the components of the base station 102 may, individually or collectively, be implemented with one or more ASICs adapted to perform some or all of the applicable functions in hardware.
  • Each of the noted components may be a means for performing one or more functions related to operation of the MIMO communication system 800.
  • Information and signals may be represented using any of a variety of different technologies and techniques.
  • data, instructions, commands, information, signals, bits, symbols, and chips that may be referenced throughout the above description may be represented by voltages, currents, electromagnetic waves, magnetic fields or particles, optical fields or particles, computer-executable code or instructions stored on a computer-readable medium, or any combination thereof.
  • a specially-programmed device such as but not limited to a processor, a digital signal processor (DSP) , an ASIC, a FPGA or other programmable logic device, a discrete gate or transistor logic, a discrete hardware component, or any combination thereof designed to perform the functions described herein.
  • DSP digital signal processor
  • a specially-programmed processor may be a microprocessor, but in the alternative, the processor may be any conventional processor, controller, microcontroller, or state machine.
  • a specially-programmed processor may also be implemented as a combination of computing devices, e.g., a combination of a DSP and a microprocessor, multiple microprocessors, one or more microprocessors in conjunction with a DSP core, or any other such configuration.
  • the functions described herein may be implemented in hardware, software, or any combination thereof. If implemented in software executed by a processor, the functions may be stored on or transmitted over as one or more instructions or code on a non-transitory computer-readable medium. Other examples and implementations are within the scope and spirit of the disclosure and appended claims. For example, due to the nature of software, functions described above can be implemented using software executed by a specially programmed processor, hardware, hardwiring, or combinations of any of these. Features implementing functions may also be physically located at various positions, including being distributed such that portions of functions are implemented at different physical locations. Moreover, the term “or” is intended to mean an inclusive “or” rather than an exclusive “or.
  • X employs A or B is intended to mean any of the natural inclusive permutations. That is, for example the phrase “X employs A or B” is satisfied by any of the following instances: X employs A; X employs B; or X employs both A and B.
  • “or” as used in a list of items prefaced by “at least one of” indicates a disjunctive list such that, for example, a list of “at least one of A, B, or C” means A or B or C or AB or AC or BC or ABC (A and B and C) .
  • Computer-readable media includes both computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another.
  • a storage medium may be any available medium that can be accessed by a general purpose or special purpose computer.
  • computer-readable media can comprise RAM, ROM, EEPROM, CD-ROM or other optical disk storage, magnetic disk storage or other magnetic storage devices, or any other medium that can be used to carry or store desired program code means in the form of instructions or data structures and that can be accessed by a general-purpose or special-purpose computer, or a general-purpose or special-purpose processor.
  • any connection is properly termed a computer-readable medium.
  • Disk and disc include compact disc (CD) , laser disc, optical disc, digital versatile disc (DVD) , floppy disk and Blu-ray disc where disks usually reproduce data magnetically, while discs reproduce data optically with lasers. Combinations of the above are also included within the scope of computer-readable media.

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Abstract

Des aspects ici décrits concernent les entrées multiples sorties multiples (MIMO) en liaison montante (UL) dans la nouvelle radio de cinquième génération (5G NR). Dans un exemple, les aspects peuvent comprendre la réception d'une configuration d'une ressource de signal de référence d'informations d'état de canal (CSI-RS) à puissance non nulle (NZP) en tant que signal de ressource de référence de source (RS) pour un signal cible ; la détermination d'une partie de bande passante (BWP) associée à la ressource CSI-RS NZP sur la base d'une règle d'identification de BWP ; et la communication sur la BWP associée à la ressource CSI-RS NZP.
PCT/CN2020/086023 2020-04-22 2020-04-22 Technique d'indication de partie de bande passante pour signaux de référence d'informations d'état de canal à puissance non nulle dans un système de communication sans fil WO2021212350A1 (fr)

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