WO2020204323A1 - Procédé de rapport d'informations d'état de canal d'un terminal sur la base d'une commande de puissance d'un canal de commande de liaison montante dans un système de communication sans fil, ainsi que terminal et station de base prenant en charge le procédé - Google Patents

Procédé de rapport d'informations d'état de canal d'un terminal sur la base d'une commande de puissance d'un canal de commande de liaison montante dans un système de communication sans fil, ainsi que terminal et station de base prenant en charge le procédé Download PDF

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Publication number
WO2020204323A1
WO2020204323A1 PCT/KR2020/001088 KR2020001088W WO2020204323A1 WO 2020204323 A1 WO2020204323 A1 WO 2020204323A1 KR 2020001088 W KR2020001088 W KR 2020001088W WO 2020204323 A1 WO2020204323 A1 WO 2020204323A1
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WIPO (PCT)
Prior art keywords
information
terminal
base station
csi
pucch
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PCT/KR2020/001088
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English (en)
Korean (ko)
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이길봄
강지원
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엘지전자 주식회사
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/30—Monitoring; Testing of propagation channels
    • H04B17/309—Measuring or estimating channel quality parameters
    • H04B17/318—Received signal strength
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/30—Monitoring; Testing of propagation channels
    • H04B17/309—Measuring or estimating channel quality parameters
    • H04B17/336—Signal-to-interference ratio [SIR] or carrier-to-interference ratio [CIR]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/022—Site diversity; Macro-diversity
    • H04B7/024—Co-operative use of antennas of several sites, e.g. in co-ordinated multipoint or co-operative multiple-input multiple-output [MIMO] systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
    • H04W16/24—Cell structures
    • H04W16/28—Cell structures using beam steering
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/10—Scheduling measurement reports ; Arrangements for measurement reports
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/06—TPC algorithms
    • H04W52/14—Separate analysis of uplink or downlink
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/38—TPC being performed in particular situations
    • H04W52/42—TPC being performed in particular situations in systems with time, space, frequency or polarisation diversity

Definitions

  • the following description is for a wireless communication system, based on beam management-related configuration information and physical uplink control channel (PUCCH) power control information received from a base station, the terminal provides channel state information including beam quality information. It relates to a method of reporting and a terminal and a base station supporting the same.
  • PUCCH physical uplink control channel
  • a wireless access system is a multiple access system capable of supporting communication with multiple users by sharing available system resources (bandwidth, transmission power, etc.).
  • multiple access systems include a code division multiple access (CDMA) system, a frequency division multiple access (FDMA) system, a time division multiple access (TDMA) system, an orthogonal frequency division multiple access (OFDMA) system, and a single carrier frequency (SC-FDMA) system. division multiple access) system.
  • CDMA code division multiple access
  • FDMA frequency division multiple access
  • TDMA time division multiple access
  • OFDMA orthogonal frequency division multiple access
  • SC-FDMA single carrier frequency division multiple access
  • the present disclosure provides a method of reporting channel state information of a terminal in a wireless communication system, and a terminal and a base station supporting the same.
  • the present disclosure provides a method of reporting channel state information of a terminal in a wireless communication system, and a terminal and a base station supporting the same.
  • a terminal in a method for a terminal to report channel state information (CSI) in a wireless communication system, receiving configuration information related to beam management (BM) from a base station, the The configuration information is first report configuration information configured to report beam quality information related to a predetermined number of beams in order from the first beam having the highest beam quality, or (i) the first beam having the highest beam quality and A second set to report related first beam quality information and (ii) second beam quality information related to a second beam having the same channel measurement resource (CMR) as the first beam and having the lowest beam quality Report setting information, including at least one or more of;
  • PUCCH power control information including delta function information related to a PUCCH format for a physical uplink control channel (PUCCH) transmission; (i) determining beam quality information determined from a received reference signal based on the setting information, and (ii) determining PUCCH transmission power based on the PUCCH power control information; And reporting the channel state information including the beam quality information to the base station
  • the configuration information may be received through at least one or more of higher layer signaling or downlink control information (DCI).
  • DCI downlink control information
  • the beam quality information includes reference signal received power (RSRP) information related to each reported beam, or a signal to interference and noise ratio related to each reported beam.
  • RSRP reference signal received power
  • SINR Plus noise ratio
  • the beam quality information may include at least one of RSRP information related to each of the reporting beams or SINR information related to each of the reporting beams. .
  • the configuration information may include CMR information related to each beam, and interference measurement resource (IMR) information related to each beam.
  • IMR interference measurement resource
  • the channel state information is, (i) the First beam quality information, and (ii) third beam quality information related to N-1 third beams having higher beam quality after the first beam, and N may be a natural number of 2 or more.
  • the channel state information includes (i) the first beam quality information, (ii) the second beam quality information related to the second beam having the same CMR as the first beam and having the lowest beam quality, and (iii) It may include third beam quality information related to the third beam having the highest beam quality after the first beam.
  • SINR information related to each reported beam is the It may be calculated based on the interference power determined by averaging the power of one or more ports for interference measurement resources (IMR) related to each reported beam.
  • IMR interference measurement resources
  • the SINR information related to the specific beam will be calculated based on the interference power determined based on the CMR related to the specific beam. I can.
  • SINR signal to interference plus noise ratio
  • the beam quality information including signal to interference plus noise ratio (SINR) information associated with each of the reported beams
  • SINR signal to interference plus noise ratio
  • the SINR information related to the specific beam is calculated based on the interference power determined by averaging the interference power from the at least one IMR related to the CMR. Can be.
  • the channel state information is It may further include related CMR information and interference measurement resource (IMR) information.
  • SINR signal to interference plus noise ratio
  • IMR interference measurement resource
  • the reference signal is a channel state information reference signal (CSI-RS), or a synchronization signal physical broadcast channel block (SS/PBCH block or SSB) It may include at least one or more of.
  • CSI-RS channel state information reference signal
  • SS/PBCH block or SSB synchronization signal physical broadcast channel block
  • a terminal reporting channel state information (CSI) in a wireless communication system at least one transmitter; At least one receiver; At least one processor; And at least one memory that is operatively connected to the at least one processor and stores instructions for causing the at least one processor to perform a specific operation when executed, wherein the specific operation is: from a base station , Receiving configuration information related to beam management (BM), wherein the configuration information is a first report configured to report beam quality information related to a predetermined number of beams in order from the first beam having the highest beam quality Configuration information, or (i) first beam quality information related to the first beam having the highest beam quality, and (ii) the same channel measurement resource (CMR) as the first beam, and the beam quality is the most Including at least one of second report configuration information configured to report second beam quality information related to the low second beam; Receiving, from the base station, PUCCH power control information including delta function information related to a PUCCH format for a physical uplink control channel (PUCCH) transmission; (PUCCH)
  • the terminal may communicate with at least one of a mobile terminal, a network, and an autonomous vehicle other than a vehicle including the terminal.
  • a base station for receiving channel state information (CSI) from a terminal in a wireless communication system, at least one transmitter; At least one receiver; At least one processor; And at least one memory that is operatively connected to the at least one processor and stores instructions for causing the at least one processor to perform a specific operation when executed, wherein the specific operation is: the terminal First, configuration information related to beam management (BM) is transmitted, but the configuration information is configured to report beam quality information related to a predetermined number of beams in order from the first beam having the highest beam quality.
  • BM beam management
  • Report setting information or (i) first beam quality information related to the first beam having the highest beam quality and (ii) the same channel measurement resource (CMR) as the first beam, and the beam quality is Including at least one of second report setting information configured to report second beam quality information related to the lowest second beam; Transmitting a reference signal to the terminal; Transmitting PUCCH power control information including delta function information related to a PUCCH format for physical uplink control channel (PUCCH) transmission to the terminal; And receiving the channel state information including beam quality information determined based on the configuration information and the reference signal from the terminal through a PUCCH having transmission power based on the PUCCH power control information. Start.
  • a base station may select whether to obtain beam selection flexibility or improve throughput through reporting channel state information from a terminal.
  • the base station can efficiently manage the beam to the terminal through the channel state information report.
  • the terminal can perform beam management with lower complexity.
  • FIG. 1 illustrates a communication system applied to the present disclosure.
  • FIG. 2 illustrates a wireless device applicable to the present disclosure.
  • FIG 3 shows another example of a wireless device applied to the present disclosure.
  • FIG. 4 illustrates a portable device applied to the present disclosure.
  • FIG. 5 illustrates a vehicle or an autonomous vehicle applied to the present disclosure.
  • FIG. 6 is a diagram illustrating physical channels and a signal transmission method using them.
  • FIG. 7 is a diagram illustrating a structure of a radio frame based on an NR system to which embodiments of the present disclosure are applicable.
  • FIG. 8 is a diagram illustrating a slot structure based on an NR system to which embodiments of the present disclosure are applicable.
  • FIG. 9 is a diagram showing a self-contained slot structure based on an NR system to which embodiments of the present disclosure are applicable.
  • FIG. 10 is a diagram illustrating one REG structure based on an NR system to which embodiments of the present disclosure are applicable.
  • FIG. 11 is a diagram briefly showing an SS/PBCH block applicable to the present disclosure.
  • FIG. 12 is a diagram briefly showing a configuration in which an SS/PBCH block applicable to the present disclosure is transmitted.
  • FIG. 13 is a diagram showing the configuration of a higher layer parameter CSI-ReportConfig IE applicable to the present disclosure.
  • FIG. 14 is a diagram briefly showing SSB/CSI-RS beam(s) for DL BM applicable to the present disclosure.
  • 15 is a flowchart illustrating an example of a DL BM procedure using SSB applicable to the present disclosure.
  • FIG. 16 is a diagram illustrating an example of a DL BM procedure using a CSI-RS applicable to the present disclosure
  • FIG. 17 is a flowchart illustrating an example of a reception beam determination procedure of a terminal applicable to the present disclosure.
  • FIG. 18 is a flowchart illustrating an example of a transmission beam determination process of a base station applicable to the present disclosure.
  • FIG. 19 is a diagram illustrating an example of resource allocation in time and frequency domains related to the operation of FIG. 16 applicable to the present disclosure.
  • 20 is a diagram illustrating an example of a UL BM procedure using an SRS applicable to the present disclosure.
  • 21 is a flowchart illustrating an example of a UL BM procedure using SRS applicable to the present disclosure.
  • 22 is a diagram illustrating an example of a procedure for controlling uplink transmission power.
  • DAS Distributed Antenna System
  • 24 is a diagram illustrating an example of a procedure for beam management between a terminal and a base station to which the above-described methods in the present disclosure can be applied.
  • 25 is a diagram briefly showing a network connection and communication process between a terminal and a base station applicable to the present disclosure.
  • 26 is a diagram briefly showing a DRX (Discontinuous Reception) cycle of a UE applicable to the present disclosure.
  • FIG. 27 is a diagram briefly showing the operation of a terminal and a base station according to an example of the present disclosure
  • FIG. 28 is a flowchart of an operation of a terminal according to an example of the present disclosure
  • FIG. 29 is an operation of a base station according to an example of the present disclosure It is a flow chart.
  • each component or feature may be considered optional unless otherwise explicitly stated.
  • Each component or feature may be implemented in a form that is not combined with other components or features.
  • some components and/or features may be combined to constitute an embodiment of the present disclosure.
  • the order of operations described in the embodiments of the present disclosure may be changed. Some configurations or features of one embodiment may be included in other embodiments, or may be replaced with corresponding configurations or features of other embodiments.
  • the base station has a meaning as a terminal node of a network that directly communicates with the mobile station.
  • the specific operation described as being performed by the base station in this document may be performed by an upper node of the base station in some cases.
  • a network comprising a plurality of network nodes including a base station
  • various operations performed for communication with a mobile station may be performed by the base station or network nodes other than the base station.
  • 'base station' is to be replaced by terms such as fixed station, Node B, eNode B (eNB), gNode B (gNB), advanced base station (ABS), or access point. I can.
  • a terminal is a user equipment (UE), a mobile station (MS), a subscriber station (SS), and a mobile subscriber station (MSS).
  • UE user equipment
  • MS mobile station
  • SS subscriber station
  • MSS mobile subscriber station
  • AMS advanced mobile station
  • the transmitting end refers to a fixed and/or mobile node that provides a data service or a voice service
  • the receiving end refers to a fixed and/or mobile node that receives a data service or a voice service.
  • the mobile station in the uplink, the mobile station may be the transmitting end and the base station may be the receiving end.
  • the mobile station in the downlink, the mobile station may be the receiving end and the base station may be the transmitting end.
  • Embodiments of the present disclosure may be supported by standard documents disclosed in at least one of the IEEE 802.xx system, 3rd Generation Partnership Project (3GPP) system, 3GPP LTE system, 3GPP 5G NR system, and 3GPP2 system as radio access systems,
  • 3GPP TS 38.211, 3GPP TS 38.212, 3GPP TS 38.213, 3GPP TS 38.321 and 3GPP TS 38.331 documents that is, obvious steps or parts not described among the embodiments of the present disclosure may be described with reference to the above documents.
  • all terms disclosed in this document can be described by the standard document.
  • 3GPP NR system will be described as an example of a wireless access system in which embodiments of the present disclosure can be used.
  • CDMA code division multiple access
  • FDMA frequency division multiple access
  • TDMA time division multiple access
  • OFDMA orthogonal frequency division multiple access
  • SC-FDMA single carrier frequency division multiple access
  • embodiments of the present disclosure will be mainly described with a 3GPP NR system.
  • the embodiment proposed in the present disclosure may be equally applied to other wireless systems (eg, 3GPP LTE, IEEE 802.16, IEEE 802.11, etc.).
  • FIG. 1 illustrates a communication system 1 applied to the present disclosure.
  • a communication system 1 applied to the present disclosure includes a wireless device, a base station, and a network.
  • the wireless device refers to a device that performs communication using a wireless access technology (eg, 5G NR (New RAT), LTE (Long Term Evolution)), and may be referred to as a communication/wireless/5G device.
  • wireless devices include robots 100a, vehicles 100b-1 and 100b-2, eXtended Reality (XR) devices 100c, hand-held devices 100d, and home appliances 100e. ), an Internet of Thing (IoT) device 100f, and an AI device/server 400.
  • the vehicle may include a vehicle equipped with a wireless communication function, an autonomous vehicle, and a vehicle capable of performing inter-vehicle communication.
  • the vehicle may include an Unmanned Aerial Vehicle (UAV) (eg, a drone).
  • UAV Unmanned Aerial Vehicle
  • XR devices include AR (Augmented Reality) / VR (Virtual Reality) / MR (Mixed Reality) devices, including HMD (Head-Mounted Device), HUD (Head-Up Display), TV, smartphone, It can be implemented in the form of a computer, wearable device, home appliance, digital signage, vehicle, robot, and the like.
  • Portable devices may include smart phones, smart pads, wearable devices (eg, smart watches, smart glasses), computers (eg, notebook computers, etc.).
  • Home appliances may include TVs, refrigerators, and washing machines.
  • IoT devices may include sensors, smart meters, and the like.
  • the base station and the network may be implemented as a wireless device, and the specific wireless device 200a may operate as a base station/network node to another wireless device.
  • the wireless devices 100a to 100f may be connected to the network 300 through the base station 200.
  • AI Artificial Intelligence
  • the network 300 may be configured using a 3G network, a 4G (eg, LTE) network, or a 5G (eg, NR) network.
  • the wireless devices 100a to 100f may communicate with each other through the base station 200 / network 300, but may perform direct communication (e.g. sidelink communication) without going through the base station / network.
  • the vehicles 100b-1 and 100b-2 may perform direct communication (e.g.
  • V2V Vehicle to Vehicle
  • V2X Vehicle to Everything
  • the IoT device eg, sensor
  • the IoT device may directly communicate with other IoT devices (eg, sensors) or other wireless devices 100a to 100f.
  • Wireless communication/connections 150a, 150b, and 150c may be established between the wireless devices 100a to 100f / base station 200 and the base station 200 / base station 200.
  • wireless communication/connection includes various wireless access such as uplink/downlink communication 150a, sidelink communication 150b (or D2D communication), base station communication 150c (eg relay, Integrated Access Backhaul). This can be achieved through technology (eg 5G NR)
  • the wireless communication/connection 150a, 150b, 150c may transmit/receive signals through various physical channels.
  • FIG. 2 illustrates a wireless device applicable to the present disclosure.
  • the first wireless device 100 and the second wireless device 200 may transmit and receive wireless signals through various wireless access technologies (eg, LTE and NR).
  • ⁇ the first wireless device 100, the second wireless device 200 ⁇ is the ⁇ wireless device 100x, the base station 200 ⁇ and/or ⁇ wireless device 100x, wireless device 100x) of FIG. ⁇ Can be matched.
  • the first wireless device 100 includes one or more processors 102 and one or more memories 104, and may further include one or more transceivers 106 and/or one or more antennas 108.
  • the processor 102 controls the memory 104 and/or the transceiver 106 and may be configured to implement the descriptions, functions, procedures, suggestions, methods, and/or operational flowcharts disclosed herein.
  • the processor 102 may process information in the memory 104 to generate first information/signal, and then transmit a radio signal including the first information/signal through the transceiver 106.
  • the processor 102 may store information obtained from signal processing of the second information/signal in the memory 104 after receiving a radio signal including the second information/signal through the transceiver 106.
  • the memory 104 may be connected to the processor 102 and may store various information related to the operation of the processor 102.
  • the memory 104 may perform some or all of the processes controlled by the processor 102, or instructions for performing the descriptions, functions, procedures, suggestions, methods, and/or operational flow charts disclosed in this document. It can store software code including
  • the processor 102 and the memory 104 may be part of a communication modem/circuit/chip designed to implement wireless communication technology (eg, LTE, NR).
  • the transceiver 106 may be coupled with the processor 102 and may transmit and/or receive radio signals through one or more antennas 108.
  • the transceiver 106 may include a transmitter and/or a receiver.
  • the transceiver 106 may be mixed with an RF (Radio Frequency) unit.
  • a wireless device may mean a communication modem/circuit/chip.
  • the second wireless device 200 includes one or more processors 202 and one or more memories 204, and may further include one or more transceivers 206 and/or one or more antennas 208.
  • the processor 202 controls the memory 204 and/or the transceiver 206 and may be configured to implement the descriptions, functions, procedures, suggestions, methods, and/or operational flowcharts disclosed herein.
  • the processor 202 may process information in the memory 204 to generate third information/signal, and then transmit a wireless signal including the third information/signal through the transceiver 206.
  • the processor 202 may store information obtained from signal processing of the fourth information/signal in the memory 204 after receiving a radio signal including the fourth information/signal through the transceiver 206.
  • the memory 204 may be connected to the processor 202 and may store various information related to the operation of the processor 202. For example, the memory 204 may perform some or all of the processes controlled by the processor 202, or instructions for performing the descriptions, functions, procedures, suggestions, methods and/or operational flow charts disclosed in this document. It can store software code including
  • the processor 202 and the memory 204 may be part of a communication modem/circuit/chip designed to implement wireless communication technology (eg, LTE, NR).
  • the transceiver 206 may be connected to the processor 202 and may transmit and/or receive radio signals through one or more antennas 208.
  • the transceiver 206 may include a transmitter and/or a receiver.
  • the transceiver 206 may be used interchangeably with an RF unit.
  • a wireless device may mean a communication modem/circuit/chip.
  • one or more protocol layers may be implemented by one or more processors 102, 202.
  • one or more processors 102, 202 may implement one or more layers (eg, functional layers such as PHY, MAC, RLC, PDCP, RRC, SDAP).
  • One or more processors 102, 202 may be configured to generate one or more Protocol Data Units (PDUs) and/or one or more Service Data Units (SDUs) according to the description, functions, procedures, proposals, methods, and/or operational flow charts disclosed in this document. Can be generated.
  • PDUs Protocol Data Units
  • SDUs Service Data Units
  • One or more processors 102, 202 may generate messages, control information, data, or information according to the description, function, procedure, suggestion, method, and/or operational flow chart disclosed herein.
  • At least one processor (102, 202) generates a signal (e.g., a baseband signal) including PDU, SDU, message, control information, data or information according to the functions, procedures, proposals and/or methods disclosed herein. , It may be provided to one or more transceivers (106, 206).
  • One or more processors 102, 202 may receive signals (e.g., baseband signals) from one or more transceivers 106, 206, and the descriptions, functions, procedures, proposals, methods, and/or operational flowcharts disclosed herein PDUs, SDUs, messages, control information, data, or information may be obtained according to the parameters.
  • signals e.g., baseband signals
  • One or more of the processors 102 and 202 may be referred to as a controller, microcontroller, microprocessor, or microcomputer.
  • One or more of the processors 102 and 202 may be implemented by hardware, firmware, software, or a combination thereof.
  • ASICs Application Specific Integrated Circuits
  • DSPs Digital Signal Processors
  • DSPDs Digital Signal Processing Devices
  • PLDs Programmable Logic Devices
  • FPGAs Field Programmable Gate Arrays
  • the description, functions, procedures, suggestions, methods, and/or operational flow charts disclosed in this document may be implemented using firmware or software, and firmware or software may be implemented to include modules, procedures, functions, and the like.
  • the description, functions, procedures, proposals, methods and/or operational flow charts disclosed in this document are included in one or more processors 102, 202, or stored in one or more memories 104, 204, and are It may be driven by the above processors 102 and 202.
  • the descriptions, functions, procedures, proposals, methods and/or operational flowcharts disclosed in this document may be implemented using firmware or software in the form of codes, instructions and/or a set of instructions.
  • One or more memories 104 and 204 may be connected to one or more processors 102 and 202 and may store various types of data, signals, messages, information, programs, codes, instructions and/or instructions.
  • One or more memories 104 and 204 may be composed of ROM, RAM, EPROM, flash memory, hard drive, register, cache memory, computer readable storage medium, and/or combinations thereof.
  • One or more memories 104 and 204 may be located inside and/or outside of one or more processors 102 and 202.
  • one or more memories 104, 204 may be connected to one or more processors 102, 202 through various technologies such as wired or wireless connection.
  • the one or more transceivers 106 and 206 may transmit user data, control information, radio signals/channels, and the like mentioned in the methods and/or operation flow charts of this document to one or more other devices.
  • One or more transceivers (106, 206) may receive user data, control information, radio signals/channels, etc. mentioned in the description, functions, procedures, suggestions, methods and/or operation flow charts disclosed in this document from one or more other devices.
  • one or more transceivers 106 and 206 may be connected to one or more processors 102 and 202, and may transmit and receive wireless signals.
  • one or more processors 102, 202 may control one or more transceivers 106, 206 to transmit user data, control information, or radio signals to one or more other devices.
  • one or more processors 102, 202 may control one or more transceivers 106, 206 to receive user data, control information, or radio signals from one or more other devices.
  • one or more transceivers (106, 206) may be connected with one or more antennas (108, 208), and one or more transceivers (106, 206) through one or more antennas (108, 208), the description and functionality disclosed in this document. It may be set to transmit and receive user data, control information, radio signals/channels, and the like mentioned in a procedure, a proposal, a method and/or an operation flowchart.
  • one or more antennas may be a plurality of physical antennas or a plurality of logical antennas (eg, antenna ports).
  • One or more transceivers (106, 206) in order to process the received user data, control information, radio signal / channel, etc. using one or more processors (102, 202), the received radio signal / channel, etc. in the RF band signal. It can be converted into a baseband signal.
  • One or more transceivers 106 and 206 may convert user data, control information, radio signals/channels, etc. processed using one or more processors 102 and 202 from a baseband signal to an RF band signal.
  • one or more of the transceivers 106 and 206 may include (analog) oscillators and/or filters.
  • FIG. 3 shows another example of a wireless device applied to the present disclosure.
  • the wireless device may be implemented in various forms according to use-examples/services (see FIG. 1).
  • the wireless devices 100 and 200 correspond to the wireless devices 100 and 200 of FIG. 2, and various elements, components, units/units, and/or modules ) Can be composed of.
  • the wireless devices 100 and 200 may include a communication unit 110, a control unit 120, a memory unit 130, and an additional element 140.
  • the communication unit may include a communication circuit 112 and a transceiver(s) 114.
  • communication circuitry 112 may include one or more processors 102,202 and/or one or more memories 104,204 of FIG. 2.
  • the transceiver(s) 114 may include one or more transceivers 106,206 and/or one or more antennas 108,208 of FIG. 2.
  • the control unit 120 is electrically connected to the communication unit 110, the memory unit 130, and the additional element 140 and controls all operations of the wireless device.
  • the controller 120 may control the electrical/mechanical operation of the wireless device based on the program/code/command/information stored in the memory unit 130.
  • the control unit 120 transmits the information stored in the memory unit 130 to an external (eg, other communication device) through the communication unit 110 through a wireless/wired interface, or through the communication unit 110 to the outside (eg, Information received through a wireless/wired interface from another communication device) may be stored in the memory unit 130.
  • the additional element 140 may be variously configured according to the type of wireless device.
  • the additional element 140 may include at least one of a power unit/battery, an I/O unit, a driving unit, and a computing unit.
  • wireless devices include robots (Fig. 1, 100a), vehicles (Fig. 1, 100b-1, 100b-2), XR equipment (Fig. 1, 100c), portable equipment (Fig. 1, 100d), and home appliances.
  • Fig. 1, 100e) IoT device
  • digital broadcasting terminal hologram device, public safety device, MTC device, medical device, fintech device (or financial device), security device, climate/environment device, It may be implemented in the form of an AI server/device (Fig. 1, 400), a base station (Fig. 1, 200), and a network node.
  • the wireless device can be used in a mobile or fixed location depending on the use-example/service.
  • various elements, components, units/units, and/or modules in the wireless devices 100 and 200 may be entirely interconnected through a wired interface, or at least some may be wirelessly connected through the communication unit 110.
  • the control unit 120 and the communication unit 110 are connected by wire, and the control unit 120 and the first unit (eg, 130, 140) are connected through the communication unit 110.
  • the control unit 120 and the first unit eg, 130, 140
  • each element, component, unit/unit, and/or module in the wireless device 100 and 200 may further include one or more elements.
  • the controller 120 may be configured with one or more processor sets.
  • control unit 120 may be composed of a set of a communication control processor, an application processor, an electronic control unit (ECU), a graphic processing processor, and a memory control processor.
  • memory unit 130 includes random access memory (RAM), dynamic RAM (DRAM), read only memory (ROM), flash memory, volatile memory, and non-volatile memory. volatile memory) and/or a combination thereof.
  • FIG. 3 An implementation example of FIG. 3 will be described in more detail with reference to the drawings.
  • Portable devices may include smart phones, smart pads, wearable devices (eg, smart watches, smart glasses), and portable computers (eg, notebook computers).
  • the portable device may be referred to as a mobile station (MS), a user terminal (UT), a mobile subscriber station (MSS), a subscriber station (SS), an advanced mobile station (AMS), or a wireless terminal (WT).
  • MS mobile station
  • UT user terminal
  • MSS mobile subscriber station
  • SS subscriber station
  • AMS advanced mobile station
  • WT wireless terminal
  • the portable device 100 includes an antenna unit 108, a communication unit 110, a control unit 120, a memory unit 130, a power supply unit 140a, an interface unit 140b, and an input/output unit 140c. ) Can be included.
  • the antenna unit 108 may be configured as a part of the communication unit 110.
  • Blocks 110 to 130/140a to 140c correspond to blocks 110 to 130/140 of FIG. 1, respectively.
  • the communication unit 110 may transmit and receive signals (eg, data, control signals, etc.) with other wireless devices and base stations.
  • the controller 120 may perform various operations by controlling components of the portable device 100.
  • the controller 120 may include an application processor (AP).
  • the memory unit 130 may store data/parameters/programs/codes/commands required for driving the portable device 100. Also, the memory unit 130 may store input/output data/information, and the like.
  • the power supply unit 140a supplies power to the portable device 100 and may include a wired/wireless charging circuit, a battery, and the like.
  • the interface unit 140b may support connection between the portable device 100 and other external devices.
  • the interface unit 140b may include various ports (eg, audio input/output ports, video input/output ports) for connection with external devices.
  • the input/output unit 140c may receive or output image information/signal, audio information/signal, data, and/or information input from a user.
  • the input/output unit 140c may include a camera, a microphone, a user input unit, a display unit 140d, a speaker, and/or a haptic module.
  • the input/output unit 140c acquires information/signals (eg, touch, text, voice, image, video) input from the user, and the obtained information/signals are stored in the memory unit 130. Can be saved.
  • the communication unit 110 may convert information/signals stored in the memory into wireless signals, and may directly transmit the converted wireless signals to other wireless devices or to a base station.
  • the communication unit 110 may restore the received radio signal to the original information/signal. After the restored information/signal is stored in the memory unit 130, it may be output in various forms (eg, text, voice, image, video, heptic) through the input/output unit 140c.
  • the vehicle or autonomous vehicle may be implemented as a mobile robot, a vehicle, a train, an aerial vehicle (AV), or a ship.
  • AV aerial vehicle
  • the vehicle or autonomous driving vehicle 100 includes an antenna unit 108, a communication unit 110, a control unit 120, a driving unit 140a, a power supply unit 140b, a sensor unit 140c, and autonomous driving. It may include a unit (140d).
  • the antenna unit 108 may be configured as a part of the communication unit 110.
  • Blocks 110/130/140a to 140d correspond to blocks 110/130/140 of FIG. 4, respectively.
  • the communication unit 110 may transmit and receive signals (eg, data, control signals, etc.) with external devices such as other vehicles, base stations (e.g. base stations, roadside base stations, etc.), and servers.
  • the controller 120 may perform various operations by controlling elements of the vehicle or the autonomous vehicle 100.
  • the control unit 120 may include an Electronic Control Unit (ECU).
  • the driving unit 140a may cause the vehicle or the autonomous vehicle 100 to travel on the ground.
  • the driving unit 140a may include an engine, a motor, a power train, a wheel, a brake, a steering device, and the like.
  • the power supply unit 140b supplies power to the vehicle or the autonomous vehicle 100, and may include a wired/wireless charging circuit, a battery, and the like.
  • the sensor unit 140c may obtain vehicle status, surrounding environment information, user information, and the like.
  • the sensor unit 140c is an IMU (inertial measurement unit) sensor, a collision sensor, a wheel sensor, a speed sensor, an inclination sensor, a weight detection sensor, a heading sensor, a position module, and a vehicle advancement. /Reverse sensor, battery sensor, fuel sensor, tire sensor, steering sensor, temperature sensor, humidity sensor, ultrasonic sensor, illumination sensor, pedal position sensor, etc. may be included.
  • the autonomous driving unit 140d is a technology for maintaining a driving lane, a technology for automatically adjusting the speed such as adaptive cruise control, a technology for automatically driving along a predetermined route, and for driving by automatically setting a route when a destination is set. Technology, etc. can be implemented.
  • the communication unit 110 may receive map data and traffic information data from an external server.
  • the autonomous driving unit 140d may generate an autonomous driving route and a driving plan based on the acquired data.
  • the controller 120 may control the driving unit 140a so that the vehicle or the autonomous driving vehicle 100 moves along the autonomous driving path according to the driving plan (eg, speed/direction adjustment).
  • the communication unit 110 asynchronously/periodically acquires the latest traffic information data from an external server, and may acquire surrounding traffic information data from surrounding vehicles.
  • the sensor unit 140c may acquire vehicle state and surrounding environment information.
  • the autonomous driving unit 140d may update the autonomous driving route and the driving plan based on the newly acquired data/information.
  • the communication unit 110 may transmit information about a vehicle location, an autonomous driving route, and a driving plan to an external server.
  • the external server may predict traffic information data in advance using AI technology or the like based on information collected from the vehicle or autonomously driving vehicles, and may provide the predicted traffic information data to the vehicle or autonomously driving vehicles.
  • a terminal receives information from a base station through a downlink (DL) and transmits information to the base station through an uplink (UL).
  • the information transmitted and received by the base station and the terminal includes general data information and various control information, and various physical channels exist according to the type/use of information transmitted and received by them.
  • FIG. 6 is a diagram illustrating physical channels that can be used in embodiments of the present disclosure and a signal transmission method using them.
  • the terminal newly entering the cell performs an initial cell search operation such as synchronizing with the base station in step S11.
  • the UE receives a Primary Synchronization Channel (P-SCH) and a Secondary Synchronization Channel (S-SCH) from the base station to synchronize with the base station, and obtains information such as cell ID.
  • P-SCH Primary Synchronization Channel
  • S-SCH Secondary Synchronization Channel
  • the terminal may receive a physical broadcast channel (PBCH) signal from the base station to obtain intra-cell broadcast information.
  • PBCH physical broadcast channel
  • the UE may check the downlink channel state by receiving a downlink reference signal (DL RS) in the initial cell search step.
  • DL RS downlink reference signal
  • the UE After completing the initial cell search, the UE receives a physical downlink control channel (PDCCH) and a physical downlink shared channel (PDSCH) according to the physical downlink control channel information in step S12 and further Specific system information can be obtained.
  • a physical downlink control channel (PDCCH)
  • a physical downlink shared channel (PDSCH)
  • the UE may perform a random access procedure, such as steps S13 to S16, to complete access to the base station.
  • the UE transmits a preamble through a physical random access channel (PRACH) (S13), and a RAR for the preamble through a physical downlink control channel and a corresponding physical downlink shared channel ( Random Access Response) may be received (S14).
  • the UE transmits a PUSCH (Physical Uplink Shared Channel) using the scheduling information in the RAR (S15), and a contention resolution procedure such as receiving a physical downlink control channel signal and a corresponding physical downlink shared channel signal. ) Can be performed (S16).
  • the UE After performing the above-described procedure, the UE receives a physical downlink control channel signal and/or a physical downlink shared channel signal (S17) and a physical uplink shared channel (PUSCH) as a general uplink/downlink signal transmission procedure.
  • a physical downlink control channel signal and/or a physical downlink shared channel signal S17
  • a physical uplink shared channel PUSCH
  • Uplink Shared Channel signal and/or a physical uplink control channel (PUCCH) signal may be transmitted (S18).
  • UCI uplink control information
  • HARQ-ACK/NACK Hybrid Automatic Repeat and reQuest Acknowledgement/Negative-ACK
  • SR Switching Request
  • CQI Choannel Quality Indication
  • PMI Precoding Matrix Indication
  • RI Rank Indication
  • BI Beam Indication
  • UCI is generally periodically transmitted through PUCCH, but may be transmitted through PUSCH according to embodiments (eg, when control information and traffic data are to be transmitted simultaneously).
  • the UE may aperiodically transmit UCI through the PUSCH according to the request/instruction of the network.
  • FIG. 7 is a diagram illustrating a structure of a radio frame based on an NR system to which embodiments of the present disclosure are applicable.
  • Uplink and downlink transmission based on the NR system is based on the frame shown in FIG. 7.
  • One radio frame has a length of 10 ms and is defined as two 5 ms half-frames (HF).
  • One half-frame is defined as five 1ms subframes (Subframe, SF).
  • One subframe is divided into one or more slots, and the number of slots in the subframe depends on Subcarrier Spacing (SCS).
  • SCS Subcarrier Spacing
  • Each slot includes 12 or 14 OFDM(A) symbols according to a cyclic prefix (CP). When a normal CP is used, each slot includes 14 symbols. When the extended CP is used, each slot includes 12 symbols.
  • the symbol may include an OFDM symbol (or CP-OFDM symbol), an SC-FDMA symbol (or DFT-s-OFDM symbol).
  • Table 1 shows the number of symbols per slot according to the SCS, the number of slots per frame, and the number of slots per subframe when a general CP is used
  • Table 2 shows the number of slots per SCS when the extended CSP is used. It indicates the number of symbols, the number of slots per frame, and the number of slots per subframe.
  • slot N symb denotes the number of a symbol in the slot
  • N frame ⁇ denotes a slot number of a slot within a frame
  • subframe N ⁇ slot is the number of slots within a subframe.
  • OFDM(A) numerology eg, SCS, CP length, etc.
  • OFDM(A) numerology eg, SCS, CP length, etc.
  • the (absolute time) section of the time resource eg, SF, slot or TTI
  • TU Time Unit
  • NR supports multiple numerology (or subcarrier spacing (SCS)) to support various 5G services. For example, when the SCS is 15 kHz, it supports a wide area in traditional cellular bands, and when the SCS is 30 kHz/60 kHz, it is dense-urban, lower latency. And a wider carrier bandwidth (wider carrier bandwidth) is supported, and when the SCS is 60 kHz or higher, a bandwidth greater than 24.25 GHz is supported to overcome phase noise.
  • SCS subcarrier spacing
  • the NR frequency band is defined as a frequency range of two types (FR1, FR2).
  • FR1 and FR2 can be configured as shown in the table below.
  • FR2 may mean a millimeter wave (mmW).
  • FIG. 8 is a diagram illustrating a slot structure based on an NR system to which embodiments of the present disclosure are applicable.
  • One slot includes a plurality of symbols in the time domain. For example, in the case of a normal CP, one slot includes 7 symbols, but in the case of an extended CP, one slot includes 6 symbols.
  • the carrier includes a plurality of subcarriers in the frequency domain.
  • RB Resource Block
  • RB Resource Block
  • the BWP (Bandwidth Part) is defined as a plurality of consecutive (P)RBs in the frequency domain, and may correspond to one numerology (eg, SCS, CP length, etc.).
  • numerology eg, SCS, CP length, etc.
  • the carrier may contain up to N (eg, 5) BWPs. Data communication is performed through the activated BWP, and only one BWP can be activated to one terminal.
  • N e.g. 5
  • Each element in the resource grid is referred to as a resource element (RE), and one complex symbol may be mapped.
  • RE resource element
  • FIG. 9 is a diagram showing a self-contained slot structure based on an NR system to which embodiments of the present disclosure are applicable.
  • the base station and the UE can sequentially perform DL transmission and UL transmission within one slot, and can transmit and receive DL data and also transmit and receive UL ACK/NACK thereto within the one slot.
  • this structure reduces the time required to retransmit data when a data transmission error occurs, thereby minimizing the delay in final data transmission.
  • a type gap of a certain length of time is required.
  • some OFDM symbols at a time point at which the DL to UL is switched in the independent slot structure may be set as a guard period (GP).
  • the self-supporting slot structure includes both a DL control area and a UL control area has been described, but the control areas may be selectively included in the self-supporting slot structure.
  • the self-supporting slot structure according to the present disclosure may include not only a case including both a DL control region and a UL control region as shown in FIG. 9, but also a case including only the DL control region or the UL control region.
  • one slot may be configured in the order of a DL control area / DL data area / UL control area / UL data area, or may be configured in the order of UL control area / UL data area / DL control area / DL data area.
  • the PDCCH may be transmitted in the DL control region, and the PDSCH may be transmitted in the DL data region.
  • PUCCH may be transmitted in the UL control region, and PUSCH may be transmitted in the UL data region.
  • downlink control information for example, DL data scheduling information, UL data scheduling information, and the like may be transmitted.
  • uplink control information for example, positive acknowledgment/negative acknowledgment (ACK/NACK) information for DL data, channel state information (CSI) information, scheduling request (SR), and the like may be transmitted.
  • ACK/NACK positive acknowledgment/negative acknowledgment
  • CSI channel state information
  • SR scheduling request
  • the PDSCH carries downlink data (e.g., DL-shared channel transport block, DL-SCH TB), and modulation methods such as Quadrature Phase Shift Keying (QPSK), Quadrature Amplitude Modulation (QAM), 64 QAM, and 256 QAM are used. Apply.
  • a codeword is generated by encoding TB.
  • the PDSCH can carry up to two codewords. Scrambling and modulation mapping are performed for each codeword, and modulation symbols generated from each codeword are mapped to one or more layers (Layer mapping). Each layer is mapped to a resource together with a demodulation reference signal (DMRS) to generate an OFDM symbol signal, and is transmitted through a corresponding antenna port.
  • DMRS demodulation reference signal
  • the PDCCH carries downlink control information (DCI) and a QPSK modulation method is applied.
  • DCI downlink control information
  • One PDCCH is composed of 1, 2, 4, 8, 16 Control Channel Elements (CCEs) according to the Aggregation Level (AL).
  • CCE consists of 6 REGs (Resource Element Group).
  • REG is defined by one OFDM symbol and one (P)RB.
  • FIG. 10 is a diagram illustrating one REG structure based on an NR system to which embodiments of the present disclosure are applicable.
  • D represents a resource element (RE) to which DCI is mapped
  • R represents an RE to which DMRS is mapped.
  • the DMRS is mapped to the 1st, 5th, and 9th REs in the frequency domain direction within one symbol.
  • CORESET is defined as a REG set with a given pneumonology (eg, SCS, CP length, etc.).
  • a plurality of CORESETs for one terminal may overlap in the time/frequency domain.
  • CORESET may be set through system information (eg, MIB) or UE-specific higher layer (eg, Radio Resource Control, RRC, layer) signaling.
  • RRC Radio Resource Control
  • the number of RBs constituting CORESET and the number of symbols (maximum 3) may be set by higher layer signaling.
  • PUSCH carries uplink data (e.g., UL-shared channel transport block, UL-SCH TB) and/or uplink control information (UCI), and CP-OFDM (Cyclic Prefix-Orthogonal Frequency Division Multiplexing) waveform Alternatively, it is transmitted based on a DFT-s-OFDM (Discrete Fourier Transform-spread-Orthogonal Frequency Division Multiplexing) waveform.
  • DFT-s-OFDM Discrete Fourier Transform-spread-Orthogonal Frequency Division Multiplexing
  • PUSCH may be transmitted based on a waveform or a DFT-s-OFDM waveform.
  • PUSCH transmission is dynamically scheduled by the UL grant in the DCI or is semi-static based on higher layer (e.g., RRC) signaling (and/or Layer 1 (L1) signaling (e.g., PDCCH)). Can be scheduled (configured grant).
  • PUSCH transmission may be performed based on a codebook or a non-codebook.
  • PUCCH carries uplink control information, HARQ-ACK and/or scheduling request (SR), and is divided into Short PUCCH and Long PUCCH according to the PUCCH transmission length.
  • Table 4 illustrates PUCCH formats.
  • PUCCH format 0 carries UCI of a maximum size of 2 bits, and is mapped and transmitted on a sequence basis. Specifically, the terminal transmits a specific UCI to the base station by transmitting one of the plurality of sequences through the PUCCH of PUCCH format 0. The UE transmits a PUCCH of PUCCH format 0 within a PUCCH resource for SR configuration corresponding to only when transmitting a positive SR.
  • PUCCH format 1 carries UCI of a maximum size of 2 bits, and the modulation symbol is spread by an orthogonal cover code (OCC) (set differently depending on whether or not frequency hopping) in the time domain.
  • OCC orthogonal cover code
  • the DMRS is transmitted in a symbol in which a modulation symbol is not transmitted (that is, it is transmitted after time division multiplexing (TDM)).
  • PUCCH format 2 carries UCI of a bit size larger than 2 bits, and a modulation symbol is transmitted after DMRS and FDM (Frequency Division Multiplexing).
  • the DMRS is located at symbol indexes #1, #4, #7, and #10 in a given resource block with a density of 1/3.
  • a PN (Pseudo Noise) sequence is used for the DMRS sequence. Frequency hopping may be activated for 2-symbol PUCCH format 2.
  • PUCCH format 3 does not perform multiplexing of terminals within the same physical resource blocks, and carries UCI with a bit size larger than 2 bits.
  • the PUCCH resource of PUCCH format 3 does not include an orthogonal cover code.
  • the modulation symbols are transmitted after DMRS and TDM (Time Division Multiplexing).
  • PUCCH format 4 supports multiplexing of up to 4 terminals in the same physical resource block, and carries UCI with a bit size larger than 2 bits.
  • the PUCCH resource of PUCCH format 4 includes an orthogonal cover code.
  • the modulation symbols are transmitted after DMRS and TDM (Time Division Multiplexing).
  • Synchronization Signal Block (SSB or SS/PBCH block)
  • PSS Primary Synchronization Signal
  • SSS Secondary Synchronization Signal
  • PBCH Physical Broadcast Channel
  • SS block Synchronization Signal Block or Synchronization Signal PBCH block
  • multiplexing of other signals within the one SS block may not be excluded. (Multiplexing other signals are not precluded within a'SS block').
  • the SS/PBCH block may be transmitted in a band other than the center of the system band.
  • the base station may transmit a plurality of SS/PBCH blocks.
  • FIG. 11 is a diagram briefly showing an SS/PBCH block applicable to the present disclosure.
  • the SS/PBCH block applicable to the present disclosure may be composed of 20 RBs within 4 consecutive OFDM symbols.
  • the SS/PBCH block is composed of PSS, SSS and PBCH, and the UE can perform cell search, system information acquisition, beam alignment for initial access, and DL measurement based on the SS/PBCH block. .
  • the PSS and SSS are each composed of 1 OFDM symbol and 127 subcarriers, and the PBCH is composed of 3 OFDM symbols and 576 subcarriers.
  • Polar coding and Quadrature Phase Shift Keying (QPSK) are applied to the PBCH.
  • the PBCH consists of a data RE and a demodulation reference signal (DMRS) RE for each OFDM symbol.
  • DMRS demodulation reference signal
  • the location of the DMRS RE may be determined based on the cell ID (eg, a subcarrier index mapped based on the value of N cell ID mod 4 may be determined).
  • the SS/PBCH block may be transmitted in a frequency band other than the center frequency of the frequency band used by the network.
  • a synchronization raster which is a candidate frequency position at which the UE should detect an SS/PBCH block.
  • the synchronization raster may be distinguished from a channel raster.
  • the synchronization raster may indicate a frequency location of an SS/PBCH block that can be used by the UE to obtain system information when there is no explicit signaling for the location of the SS/PBCH block.
  • the synchronization raster may be determined based on a Global Synchronization Channel Number (GSCN).
  • GSCN Global Synchronization Channel Number
  • the GSCN may be transmitted through RRC signaling (eg, Master Information Block (MIB), System Information Block (SIB), Remaining Minimum System Information (RMSI), Other System Information (OSI), etc.).
  • MIB Master Information Block
  • SIB System Information Block
  • RMSI Remaining Minimum System Information
  • OSI System Information
  • Such a synchronization raster is defined longer in the frequency axis than a channel raster in consideration of the complexity and detection speed of initial synchronization and has fewer blind detections.
  • FIG. 12 is a diagram briefly showing a configuration in which an SS/PBCH block applicable to the present disclosure is transmitted.
  • the base station may transmit an SS/PBCH block up to 64 times for 5 ms. At this time, a plurality of SS/PBCH blocks are transmitted in different transmission beams, and the UE detects the SS/PBCH block assuming that the SS/PBCH block is transmitted every 20 ms period based on one specific beam used for transmission. can do.
  • the maximum number of beams that the base station can use for SS/PBCH block transmission within a 5ms time interval may be set larger as the frequency band increases. For example, in a band below 3GHz, the base station may transmit an SS/PBCH block using up to 4 different beams in a 5ms time interval, up to 8 in a 3-6GHz band, and up to 64 different beams in a band above 6GHz.
  • the terminal may perform synchronization by receiving the SS/PBCH block as described above from the base station.
  • the synchronization procedure largely includes a cell ID detection step and a timing detection step.
  • the cell ID detection step may include a cell ID detection step based on PSS and a cell ID detection step based on SSS (eg, detecting one physical layer cell ID among a total of 1008 physical layer cell IDs).
  • the timing detection step may include a timing detection step based on PBCH DM-RS (Demodulation Reference Signal) and a timing detection step based on PBCH content (eg, MIB (Master Information Block)).
  • PBCH DM-RS Demodulation Reference Signal
  • MIB Master Information Block
  • the UE may assume that PBCH, PSS, and SSS reception occasions exist on consecutive symbols. (That is, the UE may assume that the PBCH, PSS, and SSS constitute the SS/PBCH block, as described above). Subsequently, the UE may assume that SSS, PBCH DM-RS, and PBCH data have the same Energy Per Resource Element (EPRE). In this case, the UE may assume that the ratio of PSS EPRE to SSS EPRE of the SS/PBCH block in the corresponding cell is 0 dB or 3 dB.
  • ERE Energy Per Resource Element
  • SI-RNTI System Information-Random Network Temporary Identifier
  • P-RNTI Paging-Random Network Temporary Identifier
  • RA-RNTI RA-RNTI
  • the UE monitoring the PDCCH for DCI format 1_0 with CRC (Cyclic Redundancy Check) scrambled by (Random Access-Random Network Temporary Identifier) is the ratio of PDCCH DMRS EPRE to SSS EPRE (ratio of PDCCH DMRS EPRE to SSS EPRE) It can be assumed to be within -8 dB to 8 dB.
  • the UE may acquire time synchronization and a physical cell ID of the detected cell through PSS and SSS detection. More specifically, the terminal may acquire symbol timing for an SS block through PSS detection, and may detect a cell ID within a cell ID group. Subsequently, the terminal detects the cell ID group through SSS detection.
  • the UE may detect the time index (eg, slot boundary) of the SS block through the DM-RS of the PBCH. Subsequently, the terminal may obtain half frame boundary information and system frame number (SFN) information through the MIB included in the PBCH.
  • time index eg, slot boundary
  • SFN system frame number
  • the PBCH may inform that the related (or corresponding) RMSI PDCCH/PDSCH is transmitted in the same band as the SS/PBCH block or in a different band.
  • the UE can receive RMSI (e.g., system information other than MIB (Master Information Block, MIB)) transmitted later in the frequency band indicated by the PBCH or the frequency band in which the PBCH is transmitted after decoding the PBCH. have.
  • RMSI e.g., system information other than MIB (Master Information Block, MIB)
  • first symbol indices for candidate SS/PBCH blocks may be determined according to subcarrier spacing of SS/PBCH blocks as follows. At this time, index #0 corresponds to the first symbol of the first slot in the half frame.
  • the first symbols of candidate SS/PBCH blocks may have symbols of ⁇ 2, 8 ⁇ + 14*n.
  • n has a value of 0 or 1.
  • n has a value of 0, 1, 2 or 3.
  • the first symbols of candidate SS/PBCH blocks may have symbols of ⁇ 4, 8, 16, 32 ⁇ + 28*n.
  • n has a value of 0.
  • n has a value of 0 or 1.
  • the first symbols of candidate SS/PBCH blocks may have symbols of ⁇ 2, 8 ⁇ + 14*n.
  • n has a value of 0 or 1.
  • n has a value of 0, 1, 2 or 3.
  • the first symbols of the candidate SS/PBCH blocks may have symbols of ⁇ 4, 8, 16, 20 ⁇ + 28*n.
  • n has values of 0, 1, 2, 3, 5, 6, 7, 8, 19, 11, 12, 13, 15, 16, 17 or 18.
  • the first symbols of the candidate SS/PBCH blocks may have symbols of ⁇ 8, 12, 16, 20, 32, 36, 40, 44 ⁇ + 56*n.
  • n has values of 0, 1, 2, 3, 5, 6, 7 or 8.
  • the terminal may obtain system information.
  • the MIB includes information/parameters for monitoring a PDCCH scheduling a PDSCH carrying a System Information Block1 (SIB1), and is transmitted by the base station to the terminal through the PBCH in the SS/PBCH block.
  • SIB1 System Information Block1
  • the UE may check whether there is a CORESET (Control Resource Set) for the Type0-PDCCH common search space based on the MIB.
  • the Type0-PDCCH common search space is a kind of PDCCH search space, and is used to transmit a PDCCH for scheduling SI messages.
  • the UE is based on information in the MIB (e.g., pdcch-ConfigSIB1), based on (i) a plurality of contiguous resource blocks constituting the CORESET and one or more consecutive (consecutive) Symbols and (ii) a PDCCH opportunity (eg, a time domain location for PDCCH reception) may be determined.
  • MIB e.g., pdcch-ConfigSIB1
  • a PDCCH opportunity eg, a time domain location for PDCCH reception
  • pdcch-ConfigSIB1 provides information on a frequency location in which SSB/SIB1 exists and a frequency range in which SSB/SIB1 does not exist.
  • SIB1 includes information related to availability and scheduling (eg, transmission period, SI-window size) of the remaining SIBs (hereinafter, SIBx, x is an integer greater than or equal to 2). For example, SIB1 may inform whether SIBx is periodically broadcast or is provided by an on-demand method (or at a request of a terminal). When SIBx is provided by an on-demand method, SIB1 may include information necessary for the UE to perform an SI request. SIB1 is transmitted through the PDSCH, the PDCCH scheduling SIB1 is transmitted through the Type0-PDCCH common search space, and SIB1 is transmitted through the PDSCH indicated by the PDCCH.
  • Synchronization raster means a frequency location of an SSB that can be used by a terminal for system information acquisition when there is no explicit signaling for the SSB location.
  • the global synchronization raster is defined for all frequencies.
  • the frequency position of the SSB is defined by the SS REF and the corresponding number GSCN (Global Synchronization Channel Number).
  • the parameters defining SS REF and GSCN for all frequency ranges are as follows.
  • the mapping between the synchronization raster and the resource block of the corresponding SSB may be based on the following table.
  • the mapping depends on the total number of resource blocks allocated in the channel, and can be applied to both UL and DL.
  • the following DCI formats may be supported.
  • the NR system may support DCI format 0_0 and DCI format 0_1 as DCI formats for PUSCH scheduling, and DCI format 1_0 and DCI format 1_1 as DCI formats for PDSCH scheduling.
  • the NR system may additionally support DCI format 2_0, DCI format 2_1, DCI format 2_2, and DCI format 2_3.
  • DCI format 0_0 is used to schedule TB (Transmission Block)-based (or TB-level) PUSCH
  • DCI format 0_1 is TB (Transmission Block)-based (or TB-level) PUSCH or (CBG (Code Block Group))
  • CBG Code Block Group
  • DCI format 1_0 is used to schedule a TB-based (or TB-level) PDSCH
  • DCI format 1_1 is a TB-based (or TB-level) PDSCH or (when CBG-based signal transmission and reception is set) CBG-based (or CBG- level) Can be used to schedule PDSCH.
  • DCI format 2_0 is used to inform the slot format (used for notifying the slot format)
  • DCI format 2_1 is used to inform the PRB and OFDM symbols assuming that a specific UE has no intended signal transmission ( used for notifying the PRB(s) and OFDM symbol(s) where UE may assume no transmission is intended for the UE)
  • DCI format 2_2 is used for transmission of the PUCCH and PUSCH Transmission Power Control (TPC) commands.
  • DCI format 2_3 may be used for transmission of a TPC command group for SRS transmission by one or more UEs (used for the transmission of a group of TPC commands for SRS transmissions by one or more UEs).
  • DCI format 1_1 includes an MCS/NDI (New Data Indicator)/RV (Redundancy Version) field for transport block (TB) 1, and the upper layer parameter maxNrofCodeWordsScheduledByDCI in the upper layer parameter PDSCH-Config is n2 (i.e. When set to 2), an MCS/NDI/RV field for transport block 2 may be further included.
  • MCS/NDI New Data Indicator
  • RV Redundancy Version
  • n2 i.e., 2
  • whether or not the transport block is substantially usable (enable/disable) may be determined by a combination of the MCS field and the RV field. More specifically, when the MCS field for a specific transport block has a value of 26 and the RV field has a value of 1, the specific transport block may be disabled.
  • a list of maximum M Transmission Configuration Indicator (TCI) state settings may be configured for one terminal.
  • the maximum M TCI state setting may be set by a higher layer parameter PDSCH-Config so that (the terminal) can decode the PDSCH according to the detection of the PDCCH including the DCI intended for the terminal and a given serving cell. have.
  • the M value may be determined depending on the capability of the terminal.
  • Each TCI-state includes a parameter for setting a QCL (quasi co-location) relationship between one or two downlink reference signals and DMRS ports of the PDSCH.
  • the QCL relationship is established based on an upper layer parameter qcl-Type1 for a first downlink reference signal (DL RS) and a higher layer parameter qcl-Type2 (if set) for a second DL RS.
  • DL RS downlink reference signal
  • qcl-Type2 if set
  • the QCL types should not be the same (shall not be the same).
  • the QCL types correspond to each DL RS given by the higher layer parameter qcl-Type in the higher layer parameter QCL-Info , and the QCL types may have one of the following values.
  • the UE receives an activation command used to map the maximum of 8 TCI states with a codepoint of a Transmission Configuration Indication (TCI) field in DCI.
  • TCI Transmission Configuration Indication
  • the mapping between the TCIs states and the code points of the TCI field in the DCI is slot #(n+3*N subframe, ⁇ slot + It can be applied from 1).
  • N subframe and ⁇ slot are determined based on Table 1 or Table 2 described above.
  • the UE may assume that the DMRS port(s) of the PDSCH of the serving cell are QCL with the SS/PBCH block determined in the initial access procedure in terms of'QCL-TypeD'.
  • SS/PBCH Synchronization Signal/Physical Broadcast Channel
  • the UE assumes that the TCI field exists in the PDCCH of DCI format 1_1 transmitted on the CORESET.
  • the upper layer parameter tci-PresentInDCI is not set or the PDSCH is scheduled according to DCI format 1_0, and the time offset between the reception time of the DL DCI and the reception time of the corresponding PDSCH is a threshold Threshold-Sched -Offset (the threshold is determined based on the reported UE capability ), if greater than or equal to, in order to determine the PDSCH antenna port QCL, the UE uses the TCI state or QCL assumption for the PDSCH for PDCCH transmission. It is assumed to be the same as the TCI state or QCL assumption applied to.
  • the UE uses the TCI-State based on the TCI field included in the DCI in the detected PDCCH to determine the PDSCH antenna port QCL.
  • the threshold is determined based on the reported UE capability
  • the DMRS port(s) are RS(s) and QCL in the TCI state for the QCL type parameter(s) given by the indicated TCI stated.
  • the indicated TCI state should be based on activated TCI states in the slot of the scheduled PDSCH.
  • the terminal assumes that the upper layer parameter tci-PresentInDCI is set to'enabled ' for the CORESET, and the search
  • the UE is a time offset between a reception time of a PDCCH detected in the search region set and a reception time of a corresponding PDSCH Expects to be greater than or equal to the threshold Threshold-Sched-Offset .
  • the QCL parameter(s) is the lowest CORESET-ID in the last slot in one or more CORESETs in the activation BWP of the serving cell monitored by the terminal for the PDCCH QCL indication of the CORESET associated with the monitored search area QCL parameter(s) used (For both the cases when higher layer parameter tci-PresentInDCI is set to'enabled ' and the higher layer parameter tci-PresentInDCI is not configured in RRC connected mode, if the offset between the reception of the DL DCI and the corresponding PDSCH is less than the threshold Threshold-Sched-Offset, the UE may assume that the DM-RS ports of PDSCH of a serving cell are quasi co-located with the RS(s) in the TCI state with respect to the QCL parameter(s) used for PDCCH quasi co-location indication of the CORESET associated with a monitored search space with the lowest CORESET-ID in the latest slot in which one or more CORESET
  • the UE when the'QCL-TypeD' of the PDSCH DMRS is different from the'QCL-TypeD' of the PDCCH DMRS overlapping on at least one symbol, the UE expects to prioritize reception of the PDCCH associated with the corresponding CORESET.
  • This operation can also be applied equally to the case of intra-band CA (if PDSCH and CORESET are in different CCs). If there is no TCI state including'QCL-TypeD' among the configured TCI states, the terminal is the TCI indicated for the scheduled PDSCH, regardless of the time offset between the reception time of the DL DCI and the reception time of the corresponding PDSCH Another QCL assumption is obtained from state.
  • the UE For periodic CSI-RS resources in the upper layer parameter NZP-CSI-RS-ResourceSet in which the upper layer parameter trs-Info is configured, the UE should assume that the TCI state indicates one of the following QCL type(s):
  • the UE For the CSI-RS resource in the higher layer parameter NZP-CSI-RS-ResourceSet set without the higher layer parameter trs-Info and the higher layer parameter repetition , the UE should assume that the TCI state indicates one of the following QCL type(s). :
  • the upper layer parameter repetition is set 'QCL-TypeD' for periodic CSI-RS resources in the layer parameter NZP-CSI-RS-ResourceSet , or
  • the UE For the CSI-RS resource in the higher layer parameter NZP-CSI-RS-ResourceSet in which the higher layer parameter repetition is configured, the UE should assume that the TCI state indicates one of the following QCL type(s):
  • the upper layer parameter repetition is set 'QCL-TypeD' for CSI-RS resources in the layer parameter NZP-CSI-RS-ResourceSet , or,
  • the UE For the DMRS of the PDCCH, the UE should assume that the TCI state indicates one of the following QCL type(s):
  • the upper layer parameter repetition is set 'QCL-TypeD' for CSI-RS resources in the layer parameter NZP-CSI-RS-ResourceSet , or,
  • the UE For the DMRS of the PDSCH, the UE should assume that the TCI state indicates one of the following QCL type(s):
  • the upper layer parameter repetition is set 'QCL-TypeD' for CSI-RS resources in the layer parameter NZP-CSI-RS-ResourceSet , or,
  • QCL signaling may include all signaling configurations described in the table below.
  • the UE when there is a CSI-RS resource set by the upper layer parameter NZP-CSI-RS-ResourceSet together with the upper layer parameter trs-Info , the UE is capable of the following two of the upper layer parameter TCI-State You can only expect settings.
  • * may mean that if QCL type-D is applicable, DL RS 2 and QCL type-2 may be configured for the terminal.
  • the UE is the upper layer parameter TCI-State Only the following three possible settings can be expected.
  • * may mean that QCL type-D is not applicable.
  • ** may mean that if QCL type-D is applicable, DL RS 2 and QCL type-2 may be configured for the terminal.
  • the UE when there is a CSI-RS resource set by a higher layer parameter NZP-CSI-RS-ResourceSet together with a higher layer parameter repetition , the UE can configure the following three possible settings of the higher layer parameter TCI-State You can only expect them.
  • the TRS for downlink may have a reference signal (eg, SSB or CSI-RS) for beam management (BM) as a source RS for QCL type-D. .
  • a reference signal eg, SSB or CSI-RS
  • BM beam management
  • the UE For the DMRS of the PDCCH, the UE has only the following three possible settings of the upper layer parameter TCI-State while the fourth setting (the fourth row of the two tables below) is valid as the default setting before the TRS is configured. Can be expected.
  • * may mean a setting that can be applied before the TRS is set. Accordingly, the setting is not a TCI state, but rather can be interpreted as a valid QCL assumption.
  • ** may mean that QCL parameters are not directly derived from CSI-RS (or CSI).
  • the UE For the DMRS of the PDCCH, the UE has only three possible settings of the upper layer parameter TCI-State while the fourth setting (the fourth row of the two tables below) is valid (by default) before the TRS is configured. Can be expected.
  • * may mean a setting that can be applied before the TRS is set. Accordingly, the setting is not a TCI state, but rather can be interpreted as a valid QCL assumption.
  • ** may mean that QCL parameters are not directly derived from CSI-RS (or CSI).
  • the UE For the DMRS of the PDCCH, the UE has only three possible settings of the upper layer parameter TCI-State while the fourth setting (the fourth row of the two tables below) is valid (by default) before the TRS is configured. Can be expected.
  • * may mean a setting that can be applied before the TRS is set. Accordingly, the setting may be interpreted as a valid QCL assumption rather than a TCI state.
  • ** may mean that QCL parameters are not directly derived from CSI-RS (or CSI).
  • CSI-RS channel state information reference signal
  • each transmit antenna may have a separate reference signal.
  • a reference signal for feedback of channel state information (CSI) may be defined as a CSI-RS.
  • CSI-RS includes ZP (Zero Power) CSI-RS and NZP (Non-Zero-Power) CSI-RS.
  • ZP CSI-RS and NZP CSI-RS may be defined as follows.
  • the NZP CSI-RS may be configured by the NZP-CSI-RS-Resource IE (Information Element) or the CSI-RS-Resource-Mobility field in the CSI-RS-ResourceConfigMobility IE.
  • the NZP CSI-RS may be defined based on a sequence generation and resource mapping method defined in the 3GPP TS 38.211 standard spec.
  • -ZP CSI-RS may be set by the ZP-CSI-RS-Resource IE.
  • the UE may assume that the resource configured for the ZP CSI-RS is not used for PDSCH transmission.
  • the UE may perform the same measurement/reception on channels/signals except PDSCH regardless of whether the channel/signal excluding the PDSCH collides with the ZP CSI-RS. regardless of whether they collide with ZP CSI-RS or not).
  • Configuration parameters for CSI reporting e.g. CSI-ReportConfig IE
  • a configuration parameter for CSI reporting (eg, CSI-ReportConfig ) may be configured in the terminal.
  • FIG. 13 is a diagram showing the configuration of a higher layer parameter CSI-ReportConfig IE applicable to the present disclosure.
  • resourceForChannelMeasurement csi-IM-ResourceForInterference
  • nzp-CSI-RS-ResourceForInterference in the CSI-ReportConfig IE may have the following relationship.
  • CSI calculation may be performed as follows.
  • the report for reportQuantity ⁇ cri-RSRP or ssb-Index-RSRP ⁇ can be classified as follows.
  • the UE may be configured as follows.
  • the terminal may perform the following report according to nrofReportedRS or groupBasedBeamReporting .
  • the UE may refer to the following tables defined in Section 5.2.2.1 of 3GPP TS 38.214. More specifically, the UE may report CQI information (eg, index) closest to the measured CQI to the base station based on the following tables.
  • CQI information eg, index
  • the UE may refer to the following table for RSRP reporting. More specifically, the UE may report RSRP information (eg, index) closest to the measured RSRP to the base station based on the following table.
  • RSRP information eg, index
  • the base station reports periodic Channel State Information (CSI)/beam, semi-persistent CSI/beam report to the terminal (e.g., periodic reporting is activated only during a specific time period, or the terminal performs a number of consecutive reports), Alternatively, you can request aperiodic CSI/beam report.
  • CSI Channel State Information
  • the CSI report information may include one or more of the following information.
  • CSI-RS resource indicator CSI-RS resource indicator.
  • the beam report information includes a CRI indicating a preferred beam index when the RS for beam quality measurement is a CSI-RS, an SSBID indicating a preferred beam index when the beam quality measurement RS is SSB, and an RSRP (RS received power) indicating beam quality. ) It can be composed of a specific combination of information, etc.
  • the base station For periodic and semi-persistent (SP) CSI/beam reporting of the UE, the base station provides the UE with an UL (uplink) physical channel for CSI/beam reporting during a time period in which the corresponding report is activated at a specific period (e.g. : PUCCH, PUSCH) can be allocated.
  • the base station may transmit a downlink reference signal (DL RS) to the terminal.
  • DL RS downlink reference signal
  • the DL beam pair determination procedure includes (i) a TRP Tx beam selection procedure in which a base station transmits a DL RS corresponding to a plurality of TRP Tx beams to a terminal, and the terminal selects and/or reports one of them, and (ii ) The base station repeatedly transmits the same RS signal corresponding to each TRP Tx beam, and in response thereto, the UE measures the repeatedly transmitted signals with different UE Rx beams to select a UE Rx beam. .
  • the UL beam pair determination procedure includes: (i) a UE Tx beam selection procedure in which the UE transmits UL RSs corresponding to a plurality of UE Tx beams to a base station, and the base station selects and/or signals one of them, and (ii ) It may consist of a combination of procedures in which the UE repeatedly transmits the same RS signal corresponding to the UE Tx beam, and the base station measures the repeatedly transmitted signals with different TRP Rx beams in response thereto and selects a TRP Rx beam.
  • the beam reciprocity (or beam correspondence) of DL/UL is established (e.g., in communication between the base station and the terminal, it is assumed that the base station DL Tx beam and the base station UL Rx beam coincide, and the terminal UL Tx beam and the terminal DL Rx beam coincide If possible), if only one of the DL beam pair and the UL beam pair is determined, the procedure for determining the other may be omitted.
  • the process of determining a DL and/or UL beam pair may be performed periodically or aperiodically. For example, when the number of candidate beams is large, the required RS overhead may increase. In this case, the process of determining a DL and/or UL beam pair may be performed at a predetermined period in consideration of the RS overhead.
  • the UE may perform periodic or SP CSI reporting.
  • the CSI-RS including a single or a plurality of antenna ports for CSI measurement of the UE may be beamformed and transmitted in a TRP Tx beam determined as a DL beam.
  • the transmission period of the CSI-RS may be set equal to the CSI reporting period of the UE or shorter than the CSI reporting period of the UE.
  • the base station may transmit the aperiodic CSI-RS according to the CSI reporting period of the terminal or more frequently than the CSI reporting period of the terminal.
  • the UE may transmit the measured CSI information using a UL Tx beam determined in a periodic UL beam pair determination process.
  • the beam management (BM) procedure is a base station (eg, gNB, TRP, etc.) that can be used for downlink (downlink, DL) and uplink (uplink, UL) transmission/reception.
  • a base station eg, gNB, TRP, etc.
  • L1 layer 1
  • L2 layer 2
  • the base station or the UE measures the characteristics of the received beamforming signal
  • -Beam sweeping An operation of covering a spatial area using a transmission and/or reception beam for a predetermined time interval in a predetermined manner.
  • -Beam report an operation in which the terminal reports information on a beam formed signal based on beam measurement
  • the BM procedure can be divided into (1) a DL BM procedure using a synchronization signal (SS)/physical broadcast channel (PBCH) block or a CSI-RS, and (2) a UL BM procedure using a sounding reference signal (SRS).
  • SS synchronization signal
  • PBCH physical broadcast channel
  • SRS sounding reference signal
  • each BM procedure may include Tx beam sweeping to determine the Tx beam and Rx beam sweeping to determine the Rx beam.
  • the DL BM procedure may include (1) transmission of beamformed DL RS (reference signals) (eg, CSI-RS or SS Block (SSB)) of the base station, and (2) beam reporting of the terminal.
  • DL RS reference signals
  • SSB SS Block
  • the beam reporting may include a preferred (preferred) DL RS identifier (s) and a corresponding L1-RSRP (Reference Signal Received Power).
  • s preferred DL RS identifier
  • L1-RSRP Reference Signal Received Power
  • the DL RS ID may be an SSB Resource Indicator (SSBRI) or a CSI-RS Resource Indicator (CRI).
  • SSBRI SSB Resource Indicator
  • CRI CSI-RS Resource Indicator
  • FIG. 14 is a diagram briefly showing SSB/CSI-RS beam(s) for DL BM applicable to the present disclosure.
  • the SSB beam and the CSI-RS beam may be used for beam measurement.
  • the measurement metric is L1-RSRP for each resource/block.
  • SSB is used for coarse beam measurement, and CSI-RS can be used for fine beam measurement.
  • SSB can be used for both Tx beam sweeping and Rx beam sweeping.
  • Rx beam sweeping using SSB may be performed while the UE changes the Rx beam for the same SSBRI over a plurality of SSB bursts.
  • one SS burst includes one or more SSBs
  • one SS burst set includes one or more SSB bursts.
  • 15 is a flowchart illustrating an example of a DL BM procedure using SSB applicable to the present disclosure.
  • the configuration for the beam report using SSB is performed in CSI/beam configuration in the RRC connected state (or RRC connected mode).
  • the terminal receives a CSI-ResourceConfig IE including a CSI-SSB-ResourceSetList including SSB resources used for BM from the base station (S1510).
  • Table 18 shows an example of CSI-ResourceConfig IE, BM configuration using SSB is not separately defined, and SSB is set like CSI-RS resource.
  • the csi-SSB-ResourceSetList parameter represents a list of SSB resources used for beam management and reporting in one resource set.
  • the SSB resource set is ⁇ SSBx1, SSBx2, SSBx3, SSBx4, ... Can be set to ⁇ .
  • SSB index can be defined from 0 to 63.
  • the terminal receives an SSB resource from the base station based on the CSI-SSB-ResourceSetList (S1520).
  • the terminal reports the best SSBRI and the corresponding L1-RSRP to the base station (beam) (S1530).
  • the UE reports the best SSBRI and the corresponding L1-RSRP to the base station.
  • the UE when the UE is configured with a CSI-RS resource in the same OFDM symbol(s) as SSB (SS/PBCH Block) and'QCL-TypeD' is applicable, the UE has CSI-RS and SSB'QCL-TypeD' 'From the point of view, we can assume that it is quasi co-located.
  • SSB SS/PBCH Block
  • the QCL TypeD may mean that QCL is performed between antenna ports in terms of a spatial Rx parameter.
  • the same reception beam may be applied.
  • the UE does not expect the CSI-RS to be configured in the RE overlapping the RE of the SSB.
  • CSI-RS when a repetition parameter is set in a specific CSI-RS resource set and TRS_info is not set, the CSI-RS is used for beam management. ii) When the repetition parameter is not set and TRS_info is set, the CSI-RS is used for a tracking reference signal (TRS). iii) If the repetition parameter is not set and TRS_info is not set, the CSI-RS is used for CSI acquisition.
  • TRS tracking reference signal
  • repetition parameter may be set only for CSI-RS resource sets linked with L1 RSRP or CSI-ReportConfig having a report of'No Report (or None)'.
  • CSI-ReportConfig in which reportQuantity is set to'cri-RSRP' or'none'
  • CSI-ResourceConfig higher layer parameter resourcesForChannelMeasurement
  • the terminal When repetition is set to'ON', it is related to the Rx beam sweeping procedure of the terminal.
  • the terminal may assume that at least one CSI-RS resource in the NZP-CSI-RS-ResourceSet is transmitted through the same downlink spatial domain transmission filter. That is, at least one CSI-RS resource in the NZP-CSI-RS-ResourceSet is transmitted through the same Tx beam.
  • at least one CSI-RS resource in the NZP-CSI-RS-ResourceSet may be transmitted in different OFDM symbols.
  • the UE does not expect to receive different periods in periodicityAndOffset in all CSI-RS resources in the NZP-CSI-RS-Resourceset.
  • Repetition when Repetition is set to'OFF', it is related to the Tx beam sweeping procedure of the base station.
  • repetition when repetition is set to'OFF', the UE does not assume that at least one CSI-RS resource in the NZP-CSI-RS-ResourceSet is transmitted through the same downlink spatial domain transmission filter. That is, at least one CSI-RS resource in the NZP-CSI-RS-ResourceSet is transmitted through different Tx beams.
  • FIG. 16 is a diagram illustrating an example of a DL BM procedure using a CSI-RS applicable to the present disclosure
  • FIG. 17 is a flowchart illustrating an example of a reception beam determination procedure of a terminal applicable to the present disclosure.
  • FIG. 16(a) shows an Rx beam determination (or refinement) procedure of a terminal
  • FIG. 16(b) shows a Tx beam sweeping procedure of a base station.
  • FIG. 16(a) shows a case where the repetition parameter is set to'ON'
  • FIG. 16(b) shows a case where the repetition parameter is set to'OFF'.
  • the UE receives the NZP CSI-RS resource set IE including higher layer parameter repetition from the base station through RRC signaling (S1710).
  • the repetition parameter is set to'ON'.
  • the UE repeatedly receives resource(s) in the CSI-RS resource set set to repetition'ON' in different OFDM symbols through the same Tx beam (or DL spatial domain transmission filter) of the base station (S1720).
  • the terminal determines its own Rx beam (S1730).
  • the UE omits the CSI report (S1740).
  • the reportQuantity of the CSI report config may be set to'No report (or None)'.
  • the CSI report may be omitted.
  • FIG. 18 is a flowchart illustrating an example of a transmission beam determination process of a base station applicable to the present disclosure.
  • the terminal receives the NZP CSI-RS resource set IE including the higher layer parameter repetition from the base station through RRC signaling (S1810).
  • the repetition parameter is set to'OFF', and is related to the Tx beam sweeping procedure of the base station.
  • the terminal receives resources in the CSI-RS resource set set to repetition'OFF' through different Tx beams (DL spatial domain transmission filters) of the base station (S1820).
  • Tx beams DL spatial domain transmission filters
  • the terminal selects (or determines) the best beam (S1830)
  • the terminal reports the ID and related quality information (eg, L1-RSRP) for the selected beam to the base station (S1840).
  • the reportQuantity of the CSI report config may be set to'CRI + L1-RSRP'.
  • the UE reports the CRI and the L1-RSRP thereof to the base station.
  • FIG. 19 is a diagram illustrating an example of resource allocation in time and frequency domains related to the operation of FIG. 16 applicable to the present disclosure.
  • the UE may receive a list of up to M candidate transmission configuration indication (TCI) states for at least QCL (Quasi Co-location) indication purposes.
  • TCI transmission configuration indication
  • QCL Quadrature Co-location
  • Each TCI state can be set as one RS set.
  • Each ID of a DL RS for spatial QCL purpose (QCL Type D) in at least an RS set may refer to one of DL RS types such as SSB, P-CSI RS, SP-CSI RS, and A-CSI RS. .
  • initialization/update of the ID of the DL RS(s) in the RS set used for spatial QCL purposes may be performed through at least explicit signaling.
  • Table 19 shows an example of the TCI-State IE.
  • the TCI-State IE is associated with one or two DL reference signals (RS) corresponding quasi co-location (QCL) types.
  • RS DL reference signals
  • QCL quasi co-location
  • the bwp-Id parameter indicates the DL BWP where the RS is located
  • the cell parameter indicates the carrier where the RS is located
  • the reference signal parameter is a reference that is a source of quasi co-location for the target antenna port(s). It represents the antenna port(s) or a reference signal including it.
  • the target antenna port(s) may be CSI-RS, PDCCH DMRS, or PDSCH DMRS.
  • a corresponding TCI state ID may be indicated in NZP CSI-RS resource configuration information.
  • a TCI state ID may be indicated in each CORESET setting.
  • the TCI state ID may be indicated through DCI.
  • beam reciprocity (or beam correspondence) between Tx beam and Rx beam may or may not be established according to UE implementation. If reciprocity between the Tx beam and the Rx beam is established in both the base station and the terminal, a UL beam pair may be matched through a DL beam pair. However, when the reciprocity between the Tx beam and the Rx beam is not established at either of the base station and the terminal, a UL beam pair determination process is required separately from the DL beam pair determination.
  • the base station can use the UL BM procedure to determine the DL Tx beam without requesting the terminal to report a preferred beam.
  • UL BM may be performed through beamformed UL SRS transmission, and whether to apply UL BM of the SRS resource set is set by (higher layer parameter) usage.
  • usage is set to'Beam Management (BM)', only one SRS resource may be transmitted to each of a plurality of SRS resource sets at a given time instant.
  • BM Beam Management
  • the terminal may receive one or more Sounding Reference Symbol (SRS) resource sets set by the (higher layer parameter) SRS-ResourceSet (through higher layer signaling, RRC signaling, etc.).
  • SRS Sounding Reference Symbol
  • the UE may be configured with K ⁇ 1 SRS resources (higher later parameter SRS-resource).
  • K is a natural number, and the maximum value of K is indicated by SRS_capability.
  • the UL BM procedure can be divided into a Tx beam sweeping of a terminal and an Rx beam sweeping of a base station.
  • FIG. 20 is a diagram illustrating an example of a UL BM procedure using an SRS applicable to the present disclosure.
  • Figure 20 (a) shows the Rx beam determination procedure of the base station
  • Figure 20 (b) shows the Tx beam sweeping procedure of the terminal.
  • 21 is a flowchart illustrating an example of a UL BM procedure using SRS applicable to the present disclosure.
  • the terminal receives RRC signaling (eg, SRS-Config IE) including a usage parameter set to'beam management' (higher layer parameter) from the base station (S2110).
  • RRC signaling eg, SRS-Config IE
  • SRS-Config IE usage parameter set to'beam management' (higher layer parameter)
  • Table 20 shows an example of an SRS-Config IE (Information Element), and the SRS-Config IE is used for SRS transmission configuration.
  • the SRS-Config IE includes a list of SRS-Resources and a list of SRS-ResourceSets. Each SRS resource set means a set of SRS-resources.
  • the network can trigger the transmission of the SRS resource set using the configured aperiodicSRS-ResourceTrigger (L1 DCI).
  • usage indicates a higher layer parameter indicating whether the SRS resource set is used for beam management, codebook-based or non-codebook-based transmission.
  • the usage parameter corresponds to the L1 parameter'SRS-SetUse'.
  • 'spatialRelationInfo' is a parameter indicating the setting of the spatial relation between the reference RS and the target SRS.
  • the reference RS may be SSB, CSI-RS, or SRS corresponding to the L1 parameter'SRS-SpatialRelationInfo'.
  • the usage is set for each SRS resource set.
  • the terminal determines a Tx beam for the SRS resource to be transmitted based on the SRS-SpatialRelation Info included in the SRS-Config IE (S2120).
  • SRS-SpatialRelation Info is set for each SRS resource, and indicates whether to apply the same beam as the beam used in SSB, CSI-RS or SRS for each SRS resource.
  • SRS-SpatialRelationInfo may or may not be set for each SRS resource.
  • the terminal randomly determines the Tx beam and transmits the SRS through the determined Tx beam (S2130).
  • the UE applies the same spatial domain transmission filter (or generated from the filter) as the spatial domain Rx filter used for SSB/PBCH reception, and the corresponding SRS resource To transmit; or
  • the UE transmits SRS resources by applying the same spatial domain transmission filter used for reception of periodic CSI-RS or SP CSI-RS; or
  • the UE transmits the SRS resource by applying the same spatial domain transmission filter used for transmission of periodic SRS.
  • the terminal may or may not receive feedback for the SRS from the base station as in the following three cases (S2140).
  • Spatial_Relation_Info When Spatial_Relation_Info is set for all SRS resources in the SRS resource set, the UE transmits the SRS through a beam indicated by the base station. For example, if Spatial_Relation_Info all indicate the same SSB, CRI, or SRI, the UE repeatedly transmits the SRS with the same beam. In this case, it corresponds to FIG. 20(a) as a use for the base station to select an Rx beam.
  • Spatial_Relation_Info may not be set for all SRS resources in the SRS resource set.
  • the terminal can freely transmit while changing the SRS beam. That is, in this case, the UE sweeps the Tx beam and corresponds to FIG. 20(b).
  • Spatial_Relation_Info can be set only for some SRS resources in the SRS resource set.
  • the SRS is transmitted through the indicated beam, and for the SRS resource for which Spatial_Relation_Info is not configured, the terminal may arbitrarily apply and transmit a Tx beam.
  • a beam mismatch problem may occur according to a set beam management period.
  • the optimal DL /UL beam pair can be changed.
  • the optimal DL /UL beam pair can be changed.
  • the terminal may determine whether such a beam failure event occurs through the reception quality of the downlink RS.
  • the UE may transmit a report message for this situation or a message for a beam recovery request (hereinafter referred to as a beam failure recovery request (BFRQ) message) to the base station (or network).
  • BFRQ beam failure recovery request
  • the base station may receive the corresponding message and perform beam recovery through various processes such as beam RS transmission and beam reporting request for beam recovery. This series of beam recovery processes may be referred to as beam failure recovery (BFR).
  • BFR beam failure recovery
  • the BFR process can be configured as follows.
  • BFD Beam failure detection
  • the quality of the beam is measured based on a hypothetical block error rate (BLER).
  • BLER block error rate
  • the characteristics of the beam may be measured based on a probability that the UE fails to demodulate the corresponding information, assuming that control information is transmitted through the corresponding PDCCH.
  • a plurality of search spaces to monitor the PDCCH to a specific terminal may be set.
  • the beam (or resource) may be set differently for each search area. Therefore, the case in which all PDCCH beams fall below a predetermined quality value may mean a case in which the quality of all beams that can be set differently for each search area falls below the BLER threshold.
  • various methods of setting may be applied/set for the BFD reference signal (or BFD RS).
  • an implicit setting method may be used for the BFD reference signal.
  • a control resource set (CORESET [see TS 38.213, TS 38.214, TS 38.331)], which is a resource region through which a PDCCH can be transmitted, may be set in each search space.
  • the base station may indicate/set to the terminal RS information (eg, CSI-RS resource ID, SSB ID) QCL in terms of spatial RX parameters for each CORESET ID.
  • the base station may indicate/set the QCL-dated RS to the UE through a transmit configuration information (TCI) indication.
  • TCI transmit configuration information
  • the base station instructs/sets the RS (i.e., QCL Type D in TS 38.214) QCL to the terminal in terms of the spatial RX parameter, when the terminal receives the PDCCH DMRS, the beam used for spatially QCLd RS reception. It may include indicating/setting that (or can use) should be used as it is.
  • the base station indicates/sets the RS (i.e., QCL Type D in TS 38.214) QCL in terms of spatial RX parameter to the terminal, the base station indicates the same transmission beam for spatially QCL antenna ports or It may include informing the UE that the transmission will be performed by applying a similar transmission beam (eg, when the beam direction is the same/similar and the beam width is different).
  • the base station may explicitly set a specific RS (eg, beam RS(s)) for BFD use to the terminal.
  • the specific RS may correspond to the'all PDCCH beams'.
  • a plurality of BFD RSs is defined as a BFD RS set.
  • the MAC (Media Access Control) layer of the terminal may declare a beam failure.
  • the UE may find a beam having a predetermined quality value (Q_in) or more among RSs set by the base station as a candidate beam RS set.
  • Q_in a predetermined quality value
  • the terminal may select the corresponding beam RS.
  • the terminal may randomly select one beam RS from among the corresponding beam RSs.
  • the UE can perform Step 2 below.
  • the beam quality may be determined based on RSRP.
  • the RS beam set set by the base station may be configured as one of the following three cases.
  • -All beam RSs in the RS beam set are composed of CSI-RS resources
  • -Beam RSs in the RS beam set are composed of SSBs and CSI-RS resources
  • the UE may find a beam having a predetermined quality value (Q_in) or more among SSBs (connected to contention based PRACH resources).
  • the terminal can select the corresponding SSB.
  • the UE may randomly select one SSB from among the corresponding SSBs.
  • the terminal can perform Step 3 below.
  • the UE may select any SSB from among SSBs (connected to contention based PRACH resources).
  • the BFRQ Beam Failure Recovery Request refers to a PRACH resource and a PRACH preamble that are established directly or indirectly connected to the beam RS (eg, CSI-RS or SSB) selected by the terminal in the above-described process to the base station. May include.
  • BFRQ may include transmitting a PRACH preamble related to a beam RS selected by the UE in the above-described process through a PRACH resource related to a beam RS selected by the UE.
  • a PRACH resource and a PRACH preamble that are directly connected can be used in the following cases.
  • the indirectly connected PRACH resource and PRACH preamble may be used in the following cases.
  • the UE is designated as capable of receiving with the same reception beam as the corresponding CSI-RS (for example, quasi-co-located (QCLed) with respect to spatial Rx parameter) (contention-free) PRACH resource and PRACH connected to the SSB. You can choose preamble.
  • CSI-RS for example, quasi-co-located (QCLed) with respect to spatial Rx parameter
  • the RSRQ based on the Contention-Free PRACH resource and the PRACH preamble is referred to as a Contention Free Random Access (CFRA) based RSRQ.
  • CFRA Contention Free Random Access
  • the terminal transmits the PRACH preamble to the base station, and the terminal can monitor the response of the base station (eg, gNB) for the corresponding PRACH transmission.
  • the base station eg, gNB
  • the response signal for the contention-free PRACH resource and PRACH preamble may be transmitted through a PDCCH masked with a cell random network temporary identifier (C-RNTI).
  • C-RNTI cell random network temporary identifier
  • the PDCCH may be received on a search area separately (by RRC signaling) set for BFR use.
  • the search area can be set on a specific CORESET (for BFR).
  • a response signal for a contention based PRACH for BFR may reuse a CORESET (eg, CORESET 0 or CORESET 1) and a search area set for a random access process based on a contention based PRACH.
  • CORESET eg, CORESET 0 or CORESET 1
  • the terminal if the terminal does not receive a response signal for a certain period of time, the terminal repeatedly performs the above-described new beam identification and selection process and the BFRQ & monitoring gNB's response process. can do.
  • the UE may perform the above process until (i) PRACH transmission reaches a preset maximum number of times (eg, N_max) or (ii) a separately set timer expires. In this case, when the timer expires, the terminal may stop contention free PRACH transmission. However, in the case of contention based PRACH transmission by SSB selection, the terminal may perform the PRACH until N_max reaches (regardless of whether the timer expires).
  • the UE may perform Contention Based Random Access (CBRA) based BFRQ.
  • CBRA Contention Based Random Access
  • the UE may perform CBRA-based BFRQ as a subsequent operation.
  • the UE uses the PRACH resource used for uplink initial access, and thus collisions with other UEs may occur.
  • Beam failure procedure may be configured (The MAC entity may be configured by RRC with a beam failure recovery procedure which is used for indicating to the serving gNB of a new SSB or CSI-RS when beam failure is detected on the serving SSB ( s)/CSI-RS(s)). Beam failure may be detected by counting a beam failure instance indication from the lower layer to the MAC entity.
  • the base station may set the following parameters in the upper layer parameter BeamFailureRecoveryConfig to the terminal through RRC signaling:
  • the terminal may use the following parameters for the beam failure detection procedure:
  • the initial value is set to 0
  • the MAC entity of the terminal may operate as follows.
  • SpCell Special Cell, e.g.: Primary Cell in MCG (Macro Cell Group), or PSCell (Primary SCG Cell) in SCG (Secondary Cell Group) by applying the powerRampingStep, preambleReceivedTargetPower, and preambleTransMax parameters set in the upper layer parameter beamFailureRecoveryConfig .
  • PSCell Primary Cell in MCG (Macro Cell Group)
  • PSCell Primary SCG Cell
  • preambleReceivedTargetPower PreambleTransMax parameters set in the upper layer parameter beamFailureRecoveryConfig .
  • PCell may be defined as follows.
  • PCell Primary Cell
  • the UE performs an initial connection establishment procedure or initiates a connection re-establishment procedure, or indicates a primary cell within a handover procedure.
  • a cell operating on a secondary frequency a cell that can be configured when an RRC connection is established or a cell used to provide additional radio resources such as an additional carrier for carrier aggregation
  • contention based random access (CBRA) on SCell cannot be set.
  • CFRA Contention Free Random Access
  • the word'serving cells' means one or more sets including a PCell and all SCell(s).
  • the CBRA of the PCell may be used, or the CFRA for the SCell BFR (if there is a SCell UL) may be additionally used.
  • an operation based on a PCell set in FR1 and a SCell set in FR2 may be considered.
  • the link quality of the PCell UL may be assumed to be good. Since SCell includes only DL CC (component carrier), it is possible to utilize MAC-CE in PCell as a simple solution for SCell BFR. In this case, the UE may transmit a Cell ID, a new beam RS ID, and the like through the PCell PUSCH. For a MAC-CE-based solution, the UE may need to transmit an SR (Scheduling Request) on the PUCCH.
  • SR Service Request
  • the terminal In order for the base station to promptly recognize the status of the terminal (e.g., whether the terminal requests a PUSCH for general data transmission or a PUSCH for BFR reporting, etc.), the terminal is an SR resource used only for BFRQ. It may be considered to allocate the SR resource dedicated to the (dedicated). Since this is a transmission initiated by the UE, in this case, the SR PUCCH format can be reused.
  • the following items may be considered for beam failure recovery for a SCell configured as DL only or DL/UL in FR2.
  • the PCell can operate within FR2 as well as FR1.
  • PCell BFR For SCell BFR, it can be assumed that the link quality of PCell DL/UL is good enough. If the PCell is in a beam failure state, prior to recovering the SCell beam, recovery of the PCell beam may be performed first through an existing BFR mechanism. To this end, a scheme in which only PCell UL is used for request/information related to SCell beam failure may be considered.
  • Option 2 Beam information for the occurrence and failure and/or survived beam(s) of SCell beam failure
  • the base station may trigger a regular beam report on the PCell based on an existing (existing) beam reporting mechanism in order to obtain information for the SCell.
  • the terminal may report only the occurrence of a beam failure of the SCell through the PCell UL.
  • the UE may report related information through a dedicated PUCCH resource of PUCCH format 0/1 on the PCell. Accordingly, a separate signal/message/procedure may not be defined for SCell BFR.
  • the transmission power control method is a requirement (e.g., Signal-to-Noise Ratio (SNR), Bit Error Ratio (BER)), Block Error Ratio (BLER) of a base station (e.g., gNB, eNB, etc.) Etc.).
  • SNR Signal-to-Noise Ratio
  • BER Bit Error Ratio
  • BLER Block Error Ratio
  • Power control as described above may be performed by an open-loop power control method and a closed-loop power control method.
  • the open-loop power control method is a method of controlling transmission power without feedback from a transmitting device (eg, a base station) to a receiving device (eg, a terminal, etc.) and/or feedback from the receiving device to the transmitting device.
  • a transmitting device eg, a base station
  • a receiving device eg, a terminal, etc.
  • the terminal may receive a specific channel/signal from the base station and estimate the strength of the received power by using this. Thereafter, the terminal may control the transmission power by using the estimated strength of the received power.
  • the closed loop power control method refers to a method of controlling transmission power based on feedback from a transmitting device to a receiving device and/or feedback from a receiving device to a transmitting device.
  • the base station receives a specific channel/signal from the terminal, and the optimal power level of the terminal based on the power level, SNR, BER, BLER, etc. measured by the received specific channel/signal. To decide.
  • the base station transmits information (ie, feedback) on the determined optimal power level to the terminal through a control channel or the like, and the terminal can control the transmission power using the feedback provided by the base station.
  • uplink data channel e.g., PUSCH (Physical Uplink Shared Channel)
  • uplink control channel e.g., PUCCH (Physical Uplink Control Channel)
  • SRS Sounding Reference Signal
  • PRACH Physical Random Access Channel
  • the terminal In the case of PUSCH transmission in the active uplink bandwidth part (UL bandwidth part, UL BWP) of the carrier (f) of the serving cell (c), the terminal is determined by Equation 1 below. A linear power value of the determined transmission power may be calculated. Thereafter, the corresponding terminal may control the transmission power by considering the calculated linear power value in consideration of the number of antenna ports and/or the number of SRS ports.
  • the UE activates the carrier (f) of the serving cell (c) using a parameter set configuration based on index j and a PUSCH power control adjustment state based on index l
  • the UE transmits the PUSCH transmission power at the PUSCH transmission opportunity (i) based on Equation 1 below. (dBm) can be determined.
  • index j represents an index for an open loop power control parameter (eg, P o , alpha (alpha, ⁇ ), etc.), and a maximum of 32 parameter sets may be set per cell.
  • Index q_d is the path loss (PL) measurement (e.g. Represents the index of the DL RS resource for ), and up to 4 measurements per cell can be set.
  • Index l represents an index for a closed loop power control process, and up to two processes may be set per cell.
  • P o e.g.:
  • P o Is a parameter broadcast as part of system information, and may indicate a target reception power at the receiving side.
  • the corresponding Po value may be set in consideration of the throughput of the terminal, the capacity of the cell, noise and/or interference.
  • alpha e.g. ) May represent the ratio of performing compensation for path loss.
  • Alpha may be set to a value from 0 to 1, and full pathloss compensation or fractional pathloss compensation may be performed according to the set value.
  • the alpha value may be set in consideration of interference and/or data rate between terminals.
  • the set UE transmission power may be interpreted as'configured maximum UE output power' defined in 3GPP TS 38.101-1 and/or TS38.101-2.
  • related to the PUSCH power control adjustment state May be set or indicated based on the TPC command field of DCI (eg, DCI format 0_0, DCI format 0_1, DCI format 2_2, DCI format2_3, etc.).
  • a specific Radio Resource Control (RRC) parameter (e.g., SRI-PUSCHPowerControl-Mapping, etc.) is the linkage between the SRS Resource Indicator (SRI) field of downlink control information (DCI) and the indexes j, q_d, and l described above. ) Can be represented.
  • the aforementioned indexes j, l, q_d, etc. may be associated with a beam, a panel, and/or a spatial domain transmission filter, based on specific information.
  • PUSCH transmission power control in units of beams, panels, and/or spatial domain transmission filters may be performed.
  • parameters and/or information for PUSCH power control may be individually (ie, independently) set for each BWP.
  • the corresponding parameters and/or information may be set or indicated through higher layer signaling (eg, RRC signaling, Medium Access Control-Control Element (MAC-CE), etc.) and/or DCI.
  • RRC signaling e.g, RRC signaling, Medium Access Control-Control Element (MAC-CE), etc.
  • MAC-CE Medium Access Control-Control Element
  • parameters and/or information for PUSCH power control may be delivered through RRC signaling PUSCH-ConfigCommon, PUSCH-PowerControl, etc.
  • PUSCH-ConfigCommon and PUSCH-PowerControl may be set as shown in Table 21 below.
  • the UE can determine or calculate the PUSCH transmission power, and can transmit the PUSCH using the determined or calculated PUSCH transmission power.
  • the UE uses a PUCCH power control adjustment state based on index l, of the carrier (f) of the primary cell (or secondary cell) (c).
  • the UE transmits PUCCH transmission power at a PUCCH transmission opportunity (i) based on Equation 2 below. (dBm) can be determined.
  • q_u represents an index for an open-loop power control parameter (eg, P o ), and up to 8 parameter values may be set per cell.
  • Index q_d is the path loss (PL) measure (e.g. Represents the index of the DL RS resource for ), and up to 4 measurements per cell can be set.
  • Index l represents an index for a closed loop power control process, and up to two processes may be set per cell.
  • P o (e.g.: ) Is a parameter broadcast as part of system information, and may indicate a target reception power at the receiving side.
  • the corresponding Po value may be set in consideration of the throughput of the terminal, the capacity of the cell, noise and/or interference.
  • the set UE transmission power may be interpreted as'configured maximum UE output power' defined in 3GPP TS 38.101-1 and/or TS38.101-2.
  • a delta function (e.g.
  • PUCCH format eg, PUCCH formats 0, 1, 2, 3, 4, etc.
  • related to the PUCCH power control adjustment state May be set or indicated based on a TPC command field of a DCI (eg, DCI format 1_0, DCI format 1_1, DCI format 2_2, etc.) received or detected by the terminal.
  • DCI DCI format 1_0, DCI format 1_1, DCI format 2_2, etc.
  • a specific RRC parameter eg, PUCCH-SpatialRelationInfo, etc.
  • a specific MAC-CE command eg, PUCCH spatial relation Activation/Deactivation, etc.
  • PUCCH resource and the aforementioned indexes q_u, q_d It can be used to activate or deactivate the connection relationship between, and l.
  • the PUCCH spatial relation Activation/Deactivation command in MAC-CE may activate or deactivate a connection relationship between a PUCCH resource and the aforementioned indexes q_u, q_d, and l based on the RRC parameter PUCCH-SpatialRelationInfo.
  • the above-described indexes q_u, q_d, l, etc. may be associated with a beam, a panel, and/or a spatial domain transmission filter based on specific information.
  • PUCCH transmission power control in units of beams, panels, and/or spatial domain transmission filters may be performed.
  • parameters and/or information for PUCCH power control may be set individually (ie, independently) for each BWP.
  • the corresponding parameters and/or information may be set or indicated through higher layer signaling (eg, RRC signaling, MAC-CE, etc.) and/or DCI.
  • parameters and/or information for PUCCH power control may be delivered through RRC signaling PUCCH-ConfigCommon, PUCCH-PowerControl, etc., and PUCCH-CopnfigCommon, PUCCH-PowerControl may be set as shown in Table 22 below.
  • the UE can determine or calculate the PUCCH transmission power, and transmit the PUCCH using the determined or calculated PUCCH transmission power.
  • the UE may calculate a linear power value of the transmit power determined by Equation P3 below. Thereafter, the UE can control the transmission power by equally dividing the calculated linear power value for antenna port(s) set for the SRS.
  • the UE performs SRS transmission in the activated UL BWP (b) of the carrier (f) of the serving cell (c) using the SRS power control adjustment state based on the index l
  • the terminal SRS transmission power at the SRS transmission opportunity (i) based on Equation 3 below (dBm) can be determined.
  • q_s is an open-loop power control parameter (e.g., P o , alpha, ⁇ ), path loss (PL) measurement (e.g., ) Indicates an index for DL RS resources, etc.), and can be set for each SRS resource set.
  • the index l represents an index for the closed loop power control process, and the index may be set independently of the PUSCH or may be set in association with the PUSCH.
  • the maximum number of closed loop power control processes for SRS may be 1.
  • P o e.g.:
  • P o Is a parameter broadcast as part of system information, and may indicate a target reception power at the receiving side.
  • the corresponding Po value may be set in consideration of the throughput of the terminal, the capacity of the cell, noise and/or interference.
  • alpha e.g. ) May represent the ratio of performing compensation for path loss.
  • Alpha may be set to a value from 0 to 1, and full pathloss compensation or fractional pathloss compensation may be performed according to the set value.
  • the alpha value may be set in consideration of interference and/or data rate between terminals.
  • the set UE transmission power may be interpreted as'configured maximum UE output power' defined in 3GPP TS 38.101-1 and/or TS38.101-2.
  • related to the SRS power control adjustment state May be set or indicated based on a TPC command field and/or an RRC parameter (eg, srs-PowerControlAdjustmentStates, etc.) of a DCI (eg, DCI format 2_3, etc.) received or detected by the terminal.
  • an RRC parameter eg, srs-PowerControlAdjustmentStates, etc.
  • the resource for SRS transmission may be applied as a reference for the base station and/or the terminal to determine a beam, a panel, and/or a spatial domain transmission filter, and in consideration of this, SRS transmission power control , And/or a spatial domain transmission filter.
  • the parameters and/or information for the above-described SRS power control may be individually (ie, independently) set for each BWP.
  • the corresponding parameters and/or information may be set or indicated through higher layer signaling (eg, RRC signaling, MAC-CE, etc.) and/or DCI.
  • parameters and/or information for SRS power control may be delivered through RRC signaling SRS-Config, SRS-TPC-CommandConfig, etc., and SRS-Config and SRS-TPC-CommandConfig may be set as shown in Table 23 below. I can.
  • the terminal may determine or calculate the SRS transmission power, and may transmit the SRS using the determined or calculated SRS transmission power.
  • the terminal When the terminal performs PRACH transmission in the activated UL BWP (b) of the carrier (f) of the serving cell (c), the terminal is based on Equation 4 below, PRACH transmission power at the PRACH transmission opportunity (i) (dBm) can be determined.
  • Equation 4 May represent the set terminal transmission power.
  • the set UE transmission power may be interpreted as'configured maximum UE output power' defined in 3GPP TS 38.101-1 and/or TS38.101-2.
  • Denotes the path loss for the activated UL BWP and may be determined based on the DL RS associated with PRACH transmission in the activated DL BWP of the serving cell c.
  • the UE may determine a path loss related to PRACH transmission based on a Synchronization Signal (SS)/Physical Broadcast Channel (PBCH) block related to PRACH transmission.
  • SS Synchronization Signal
  • PBCH Physical Broadcast Channel
  • parameters and/or information for PRACH power control may be individually (ie, independently) set for each BWP.
  • the corresponding parameters and/or information may be set or indicated through higher layer signaling (eg, RRC signaling, MAC-CE, etc.).
  • RRC signaling e.g, RRC signaling, MAC-CE, etc.
  • RACH-ConfigGeneric RACH-ConfigGeneric, and the like, and RACH-ConfigGeneric may be set as shown in Table 24 below.
  • the UE may determine or calculate the PRACH transmission power, and may transmit the PRACH using the determined or calculated PRACH transmission power.
  • the terminal may be configured to allocate power for the uplink transmissions according to a priority order.
  • the configured terminal transmission power is'configured maximum UE output power of the terminal' defined in 3GPP TS 38.101-1 and/or TS38.101-2 (eg: Can mean ).
  • the priority for transmission power control may be set or defined in the following order.
  • PCell Primary Cell
  • HARQ-ACK Hybrid Automatic Repeat and ReQuest-Acknowledgement
  • SR Service Request
  • aperiodic SRS has a higher priority than semi-persistent SRS and/or periodic SRS
  • PRACH in a serving cell other than a Pcell send
  • the terminal may control the total transmission power in each symbol of the transmission opportunity i to be less than or equal to a linear value of the set terminal transmission power.
  • the UE may be configured to scale and/or drop power for uplink transmission having a low priority. In this case, specific details on scaling and/or drop may be set or defined according to UE implementation.
  • the terminal may consider transmission in the Pcell as a higher priority than transmission in the Scell. And/or, in the case of transmissions having the same priority in a plurality of UL carriers (eg, two UL carriers), the UE may consider a carrier in which PUCCH transmission is configured as a high priority. In addition, when PUCCH transmission is not configured for any carrier, the UE may consider transmission on a non-supplementary UL carrier with high priority.
  • a user equipment may receive a parameter and/or information related to a transmission power (Tx power) from a base station (S2210).
  • the terminal may receive corresponding parameters and/or information through higher layer signaling (eg, RRC signaling, MAC-CE, etc.).
  • RRC signaling e.g., RRC signaling, MAC-CE, etc.
  • the terminal may refer to parameters and/or information related to transmission power control described in Sections 4.13.1 to 4.13.4 (e.g., Table 21, Table 22, Table 23, Table 24, etc.) can be received.
  • the terminal may receive a TPC command related to transmission power from the base station (S2220).
  • the UE may receive the corresponding TPC command through lower layer signaling (eg, DCI).
  • DCI lower layer signaling
  • the terminal provides information on the TPC command to be used for determining the power control adjustment state, etc., as described in Sections 4.13.1 to 4.13.3 above. It can be received through a TPC command field of a predefined DCI format. However, in the case of PRACH transmission, this step may be omitted.
  • the terminal may determine (or calculate) transmission power for uplink transmission based on parameters, information, and/or TPC commands received from the base station (S2230).
  • the terminal is based on the method described in 1) to 4) described above (eg, Equation 1, Equation 2, Equation 3, Equation 4, etc.) PUSCH transmission power, PUCCH transmission power, SRS transmission power , And/or PRACH transmission power may be determined.
  • the UE performs a priority order in section 4.13.5. In consideration of it, transmission power for uplink transmission may be determined.
  • the UE may transmit one or more uplink channels and/or signals (eg, PUSCH, PUCCH, SRS, PRACH, etc.) to the base station based on the determined (or calculated) transmission power. Yes (S2240).
  • uplink channels and/or signals eg, PUSCH, PUCCH, SRS, PRACH, etc.
  • terminal may be replaced with a user equipment (UE).
  • UE user equipment
  • the higher layer signaling may include radio resource control (RRC) signaling, MAC CE, and the like.
  • RRC radio resource control
  • a transmission reception point may be extended and applied to a beam/panel.
  • a beam may be replaced with a resource.
  • L1-SINR layer 1-signal to interference and noise ratio
  • L1-RSRQ layer 1-reference signal received quality
  • L1-RSRP layer 1-reference signal received power
  • beam quality may be extended to channel quality according to an embodiment.
  • NCR#X may mean NZ-CSI-RS-Resource #X.
  • that the base station provides a service to UE#Y based on NCR#X means that (i) the base station transmits a PDSCH having the same or similar beam direction as that of NCR#X to UE#Y, or (ii) the This may mean that the base station transmits a PDSCH having a DMRS with NCR#X as a QCL source in terms of a spatial QCL parameter to UE#Y.
  • the following table shows the CSI-ReportConfig IE applicable to the present disclosure.
  • resourcesForChannelMeasurement, csi-IM-ResourcesForInterference, nzp-CSI-RS-ResourcesForInterference are NZP CSI-RS (or SSB) for channel measurement, NZP CSI-RS (or SSB) for interference measurement, and interference It can correspond to the ZP CSI-RS for measurement.
  • CMR Channel Measurement Resource
  • NZP-based IMR Non-Zero-Power CSI-RS-Resource based Interference Measurement Resource
  • ZP-based IMR Zero-Power CSI
  • DAS Distributed Antenna System
  • TRP#1 and TRP#2 may have the same cell ID.
  • the base station may configure the CMR and NZP-CSI-RS based IMR of ReportConfig to the terminal as shown in the following table.
  • 1, 2, and 3 may mean NZP-CSI-RS-Resource#1, #2, and #3, respectively.
  • NCR may mean NZP-CSI-RS-Resource.
  • CMR, NZP-based IMR, and ZP-based IMR may mean a channel measurement resource, NZP CSI-RS-based IMR (Interference Measurement Resource), and ZP CSI-RS-based IMR, respectively.
  • CMR, NZP based IMR, ZP based IMR, and NZP CSI-RS based IMR (#X) correspond to resourcesForChannelMeasurement, nzp-CSI-RS-ResourceForInterference, csi-iM-ResourceForInterference (#X) of CSI-ReportConfig IE, respectively.
  • I can.
  • CMR and IMR may each mean a resource for measuring reception power of a channel used by the base station to transmit a PDSCH to the terminal and a resource for measuring reception power of a channel acting as interference to the terminal.
  • the UE may calculate the L1-SINR as shown in Table 27 based on the CMR and NZP-CSI-RS-based IMR configuration of Table 26.
  • CRI CSI-RS resource indicator
  • CMR CMR resource indicator
  • the UE may perform beam reporting (in the order of good performance, including CRI and L1-SINR for beam-related information with good performance/quality in terms of L1-SINR) as shown in the following equation. have.
  • CRI#2 may represent a beam in which NCR#1 is the best beam in terms of L1-SINR from a viewpoint of UE#1, and a beam that NCR#3 (best beam pair) minimizes interference.
  • the base station serves one PDSCH having the same or similar beam direction as NCR#1 and another PDSCH having the same or similar beam direction as NCR#3 to UE#1/#2 in the same time/frequency resource (e.g. : MU (Multi User) paring) is possible.
  • CRI#4 may represent a beam in which NCR#2 is the second best beam from the viewpoint of L1-SINR from the viewpoint of UE#1, and the interference of NCR#3 is also not large. If the base station cannot service UE#1 using NCR#1, it can service UE#1 using NCR#2.
  • the terminal provides information related to a beam having good performance/quality and information related to a beam having poor performance/quality in terms of L1-SINR, CRI and L1-SINR. Beam reporting including) may be performed.
  • CRI#2 may represent a beam in which NCR#1 is the best beam in terms of L1-SINR from a viewpoint of UE#1, and NCR#3 is a beam that minimizes interference.
  • CRI#1 may represent a beam in which NCR#2 increases interference from the viewpoint of UE#1, greatly deteriorating L1-SINR.
  • the base station may not serve NCR#2 to another UE in the same time/frequency resource.
  • the base station may serve the UE by simultaneously using NCR#1 and NCR#2. (Example: CoMP (Coordinated Multi Point))
  • CRI#6 gives the worst L1-SINR, but CMR itself may be meaningless. Therefore, even if the terminal reports this, it may not be of great significance from the viewpoint of the base station. Meanwhile, the base station compares CRI#1 and CRI#2 to find that NCR#1 and NCR#2 are significant beams from a terminal perspective.
  • the base station Based on the content reported by UE#1 through the above-described Reporting #1 and Reporting #2, the base station serves as the second best beam (Reporting#1) or the best beam in addition to the best beam from the viewpoint of UE#1.
  • the beam that gives the greatest interference can be known. That is, the base station can obtain a degree of freedom for selecting a beam capable of serving UE#1 based on Reporting #1 (e.g., selecting among NCR#1 or NCR#2 related beams), based on Reporting #2
  • a beam e.g., NCR#2, worst beam pair
  • the terminal when nrofReportedRS is greater than 1, as shown in the following table, the terminal reports the CRI having the largest RSRP to the base station, and whether to select one or more remaining CRIs may be determined according to the terminal implementation. .
  • the operation can be extended to the L1-SINR report of the terminal.
  • whether the terminal will report any of the above-described Reporting #1 or #2 may be determined by the terminal implementation.
  • the base station can instruct/configure to report any of Reporting #1 or #2 to the terminal, whether to obtain beam selection flexibility or to improve throughput from the viewpoint of the base station as a scheduler You can choose whether to do it.
  • the base station may improve throughput through Reporting #1 of the terminal. More specifically, the base station transmits one PDSCH in the direction of NZP-CSI-RS resource #1 through TRP#1, and the same time/frequency as the PDSCH in the direction of NZP-CSI-RS resource #2 through TRP#2 When another PDSCH is transmitted to the resource, the UE can obtain a throughput gain.
  • One CMR and one or more IMRs form one combination, and the CRI may be set to indicate one of a plurality of CMR and IMR combinations.
  • the terminal can expect to receive setting/instruction (by a base station, etc.) at least one of the following two settings (eg, settings A and B).
  • the configuration may be transmitted/configured/instructed/determined through higher layer signaling (eg, RRC and/or MAC-CE) and/or DCI between the base station and the terminal.
  • One or more of the beam quality (e.g., L1-RSRP or L1-SINR, the corresponding parameter can be set by the base station) in the highest order, or the number of CRIs set by a predetermined number or higher layer parameters and/ Or report the corresponding beam quality to the base station
  • the terminal may report one or more CRIs and/or corresponding beam quality to the base station that have the same CMR as the selected CRI and provide the lowest beam quality.
  • the CRI has the same CMR as the CRI with the best beam quality, but may have different IMRs.
  • the base station can increase the new performance of the terminal by not setting the interfering beam to another UE in the same time/frequency resource.
  • CMR and IMR may be jointly encoded (eg, one CMR and one or more IMRs form a combination, etc.).
  • CRI may be expressed as one of a plurality of combinations of CMR and IMR.
  • the base station can accurately specify only the necessary combinations to the terminal (for scheduling, etc.) (e.g., when the base station specifies unnecessary combinations, unnecessary complexity may be caused to the terminal).
  • the terminal may simply report the combination(s) useful to the base station through CRI (eg, hereinafter, Examples 1 to 3).
  • the operation according to the present disclosure is not limited to the UE reporting a combination of CMR and IMR, and may be extended and applied to the UE separately reporting CMR and IMR (Example: Example 4).
  • Example: Example 4 Example: Example 4
  • the base station may indicate/set one of (i) configuration A, (ii) configuration B, and (iii) configuration A+B to the terminal based on RRC and/or MAC-CE and/or DCI.
  • setting A+B means a case in which setting A and setting B are simultaneously set in the terminal, and Embodiment 2 shows an example related thereto.
  • setting A and setting B may be expressed as shown in the following table.
  • SSB may be used as CMR instead of NZP-CSI-RS-Resource.
  • ssb-index-L1-SINR instead of cri-L1-SINR, ssb-index-L1-SINR may be used.
  • the base station when the base station indicates/sets one of L1-RSRP or L1-SINR as beam quality to the terminal, the following method may be considered.
  • the base station adds cri-SINR in addition to cri-RSRP in ReportQunatity defined by the Rel-15 standard and indicates/sets this to the terminal, so that the beam pool quality to be reported by the terminal is L1-RSRP or L1-SINR. Can be indicated/set.
  • the base station may set whether to report to the terminal according to which of configuration A and configuration B.
  • the terminal may report beam information in the order of the best beam quality.
  • the terminal may report the same content as Reporting #1 to the base station.
  • the terminal may report beam information having the best quality and beam information having the worst quality in relation to the CMR of the best beam to the base station together.
  • the report may be configured as in Reporting #2.
  • the reason why CRI#1 rather than CRI#3 is selected is that the CMR of CRI#1 is the same as the CMR (NCR#1) of CRI#2, which provides the best beam quality.
  • this is because, when the base station provides a service to the terminal using NCR#1, the base station may not provide a service using the NCR#2 in the same time/frequency resource.
  • the base station may be configured to report both configuration A & configuration B to the terminal.
  • the above configuration may be performed based on higher layer signaling and/or DCI.
  • the terminal may report information such as the following equation to the base station. Through this, the base station can take advantage of both Reporting #1 and #2.
  • the base station may be configured to report setting A to the terminal.
  • the terminal may report to the base station as shown in the following equation.
  • the following report content may be composed of the same content as when setting A & B is set. This is because CRI#1 provides the third best beam quality.
  • the base station may be configured to report on setting B to the terminal.
  • the base station may be configured to report both configuration A & configuration B to the terminal.
  • the content that the terminal reports to the base station may additionally include CRI#3.
  • the UE can additionally inform the base station of NCR#1, which lowers the beam quality when CRI#3 has the same CMR as CRI#4 (e.g., NCR#2), and when paired with NCR#2. have.
  • the UE may separately report CMR and/or IMR other than CRI. If the base station configures/instructs the terminal to report on setting B, and configures/instructs the L1-SINR report, the terminal may report the content as shown in the following equation.
  • IMR#2 may indicate that the CMR indicated by CRI#2 (eg, NCR#1) causes the greatest interference in service to the UE. Additionally, when the base station configures/instructs the terminal to report on configuration A & configuration B, the terminal may report to the base station as follows.
  • CRI#4 and IMR#1 added compared to Reporting #A are the CRI that provides the second best L1-SINR, respectively, and the greatest interference when providing services to the UE through the CMR indicated by the CRI. IMR that causes
  • the base station configures (i) NZP-CSI-RS based IMR with 2 ports and (ii) configures/instructs the L1-SINR report to the terminal.
  • the terminal may be configured to calculate the interference power by measuring the power of each port and then averaging the power.
  • the above setting/instruction may be performed based on higher layer signaling and/or DCI.
  • NZP-CSI-RS based IMR with 2 ports may be configured as shown in the following table.
  • NZP-CSI-RS-Resource IE may include CSI-RS-ResourceMapping IE
  • ResourceMapping IE may include nrofPorts.
  • the base station may set/instruct the UE to set NZP-CSI-RS based IMR with 2 ports by setting the nrofPorts to 2.
  • the UE may calculate the interference power by measuring the power in each port and summing it. This is because each port corresponds to a different interference layer 1:1.
  • L1-SINR it is necessary to measure the reception power in one resource.
  • the terminal needs to calculate the interference power by measuring the power of each port and then averaging it. In this case, the power gain can be obtained compared to the case of 1 port. For example, it is possible to improve 3dB performance (eg, interference performance improvement, etc.) compared to the existing method.
  • the base station configures the CMR and NZP-CSI-RS based IMR of ReportConfig to the terminal.
  • the terminal may report content as shown in the following table.
  • the first CRI may have the same CMR and IMR.
  • the terminal may be configured to measure a desired channel and interference using CMR. Specifically, the terminal may estimate the requested channel and calculate the interference power from the remaining signal after removing the estimated signal/channel from the received signal.
  • the terminal may be defined/configured to calculate the final interference power by measuring the interference power from each IMR and then adding them all.
  • the base station and the terminal need to calculate the L1-SINR when receiving interference from NCR#2 and #3 while receiving service through a beam in the direction of NCR#1 from the viewpoint of UE#1. I can.
  • the base station may configure the CMR and NZP-CSI-RS based IMR#1/#2 of ReportConfig to the terminal.
  • the desired (desired) channel power and interference power according to the CRI may be configured as shown in the following table.
  • the terminal may calculate the desired channel power and interference power from NCR#1.
  • the terminal may calculate the power of the desired channel and the first interference power from NCR#1. In addition, after measuring the second interference power from NCR#2, the terminal may calculate the final interference power by adding the first interference power.
  • the terminal may calculate the power of the desired channel and the first interference power from NCR#1. In addition, after measuring the second interference power from NCR#3, the terminal may calculate a final interference power by adding the first interference power.
  • the terminal can calculate the power of the desired channel from NCR#1.
  • the terminal may calculate the final interference power by measuring the first/second interference power from NCR#2/#3, respectively, and then adding them.
  • the setting may be extended and applied as shown in the following table.
  • the figure below shows an example in which the base station configures the CMR of ReportConfig, NZP-CSI-RS based IMR#1/#2, and ZP based IMR to the UE.
  • the desired channel power and interference power according to CRI are as follows.
  • the UE may calculate the power of the desired channel from NCR#1 and calculate the interference power from ZP based IMR.
  • the terminal may calculate the power of the desired channel from NCR#1 and calculate the first interference power from the ZP based IMR. In addition, after measuring the second interference power from NCR#2, the terminal may calculate a final interference power obtained by adding the first interference power and the second interference power.
  • the terminal may calculate the power of the desired channel from NCR#1 and calculate the first interference power from the ZP based IMR. In addition, after measuring the second interference power from NCR#3, the terminal may calculate a final interference power obtained by adding the first interference power and the second interference power.
  • the terminal may calculate the power of the desired channel from NCR#1 and calculate the first interference power from the ZP based IMR. In addition, the terminal may measure the second/third interference power from NCR#2/#3, respectively, and then calculate the final interference power obtained by adding all the first to third interference powers.
  • each of CSI-ReportConfig, CSI-ResourceConfigId#100, CSI-ResourceConfigId#110, and CSI-ResourceConfigId#104 may be set as shown in the following tables.
  • 24 is a diagram illustrating an example of a procedure for beam management between a terminal and a base station to which the above-described methods in the present disclosure can be applied.
  • a base station (eg, BS) in FIG. 24 may mean a network side (eg, a transmission reception point (TRP), a TRP group, etc.).
  • the beam management described in FIG. 24 may be related to CSI-RS based DL BM (eg, DL BM using CSI-RS, etc.).
  • the terminal may receive CSI configuration information related to beam management from the base station (S2410).
  • the UE provides configuration information related to CSI reporting (eg, RRC IE'CSI Reporting Setting','CSI-ReportConfig','CSI-' through higher layer signaling (eg, RRC signaling) from the base station.
  • MeasConfig','CSI-ResourceConfig', etc. can be received.
  • the CSI configuration is resource-related configuration (e.g., CMR, NZP-CSI-RS based IMR, etc.), reporting configuration (e.g., CRI) in the method described above in the present invention (e.g., first to fourth operation examples) , L1-SINR, IMR, etc.).
  • resource-related configuration e.g., CMR, NZP-CSI-RS based IMR, etc.
  • reporting configuration e.g., CRI
  • L1-SINR L1-SINR, IMR, etc.
  • the UE may receive at least one CSI-RS from the base station (S2420), and based on the received CSI-RS, the UE may determine/calculate the beam pair(s) and/or CSI ( S2430). For example, the UE may calculate CSI based on CSI-related information (eg, CSI configuration, etc.) transmitted through higher layer signaling and/or DCI, and a predefined rule.
  • CSI-related information eg, CSI configuration, etc.
  • the terminal may determine the worst (worst) beam pair(s) and/or best (best) beam pair(s) based on the methods described in the first to fourth operation examples described above. ) And so on. For example, the terminal may determine the beam pair(s) to be reported to the BS according to the method(s) described in Embodiments 1 to 4 in consideration of the above-described configuration A and/or configuration B.
  • the terminal may perform channel estimation, interference measurement, and the like using the methods described in the first to fourth operation examples described above. For example, when NZP-CSI-RS based IMR with 2 ports is configured and the L1-SINR report is instructed to the UE, the UE may be configured to measure the power of each port and average it to calculate the interference power. have. And/or, when CMR and IMR are set to the same ID (or IMR is set to null or void), and L1-SINR report is instructed to the terminal, the terminal measures interference using CMR and L1-SINR It can also be set to calculate.
  • the UE measures the interference power from each IMR, and then adds all these to calculate the final interference power. It can also be set.
  • the UE may report the determined CSI to the BS (S2440).
  • the terminal may perform CSI reporting based on the scheme proposed in the above-described first operation example (eg, Examples 1 to 4).
  • the CSI report may include one or more CRI and/or L1-SINR and/or IMR.
  • the CSI may be reported through PUCCH.
  • the transmission power for the CSI report (eg, PUCCH Tx power) may be determined based on the aforementioned power control method (eg, section 4.13).
  • the UE may be configured to determine the PUCCH Tx power based on the above-described Equation 1 and signaling of FIG. 17 in performing CSI reporting through PUCCH.
  • the operation of the terminal and/or BS may be implemented by various devices described in the present disclosure.
  • the processor of the terminal can control to perform CSI configuration reception, CSI-RS reception, and/or CSI reporting through the RF unit, and can control to determine beam pair(s) / CSI, and transmit/receive It can be controlled to store information, etc. in memory.
  • the processor of the BS may control to perform CSI configuration transmission, CSI-RS transmission, and/or CSI report reception through the RF unit, and may control to store transmitted/received information in a memory.
  • 25 is a diagram briefly showing a network connection and communication process between a terminal and a base station applicable to the present disclosure.
  • the terminal may perform a network access procedure to perform the procedures and/or methods described/suggested above. For example, while accessing a network (eg, a base station), the terminal may receive system information and configuration information necessary to perform the procedures and/or methods described/suggested above and store them in a memory. Configuration information required for the present disclosure may be received through higher layer (eg, RRC layer; Medium Access Control, MAC, layer, etc.) signaling.
  • RRC layer Medium Access Control, MAC, layer, etc.
  • a physical channel and a reference signal may be transmitted using beam-forming.
  • a beam-management process may be involved in order to align beams between the base station and the terminal.
  • the signal proposed in the present disclosure may be transmitted/received using beam-forming.
  • RRC Radio Resource Control
  • beam alignment may be performed based on a Sync Signal Block (SSB).
  • SSB Sync Signal Block
  • RRC CONNECTED mode beam alignment may be performed based on CSI-RS (in DL) and SRS (in UL).
  • an operation related to a beam may be omitted in the following description.
  • a base station may periodically transmit an SSB (S2502).
  • SSB includes PSS/SSS/PBCH.
  • SSB can be transmitted using beam sweeping.
  • the base station may transmit Remaining Minimum System Information (RMSI) and Other System Information (OSI) (S2504).
  • the RMSI may include information (eg, PRACH configuration information) necessary for the terminal to initially access the base station.
  • the UE identifies the best SSB.
  • the terminal may transmit the RACH preamble (Message 1, Msg1) to the base station using the PRACH resource linked/corresponding to the index (ie, the beam) of the best SSB (S2506).
  • the beam direction of the RACH preamble is associated with the PRACH resource.
  • the association between the PRACH resource (and/or the RACH preamble) and the SSB (index) may be set through system information (eg, RMSI).
  • the base station transmits a RAR (Random Access Response) (Msg2) in response to the RACH preamble (S2508), and the terminal uses the UL grant in the RAR to send Msg3 (e.g., RRC Connection Request).
  • Msg4 may include RRC Connection Setup.
  • subsequent beam alignment may be performed based on SSB/CSI-RS (in DL) and SRS (in UL).
  • the terminal may receive an SSB/CSI-RS (S2514).
  • SSB/CSI-RS may be used by the UE to generate a beam/CSI report.
  • the base station may request a beam/CSI report from the terminal through DCI (S2516).
  • the UE may generate a beam/CSI report based on the SSB/CSI-RS, and transmit the generated beam/CSI report to the base station through PUSCH/PUCCH (S2518).
  • the beam/CSI report may include a beam measurement result, information on a preferred beam, and the like.
  • the base station and the terminal may switch the beam based on the beam/CSI report (S2520a, S2520b).
  • the terminal and the base station may perform the procedures and/or methods described/suggested above.
  • the terminal and the base station process information in the memory according to the proposal in the present disclosure based on the configuration information obtained in the network access process (e.g., system information acquisition process, RRC connection process through RACH, etc.) Or may process the received radio signal and store it in a memory.
  • the radio signal may include at least one of a PDCCH, a PDSCH, and a reference signal (RS) in case of a downlink, and may include at least one of a PUCCH, a PUSCH, and an SRS in case of an uplink.
  • RS reference signal
  • 26 is a diagram briefly showing a DRX (Discontinuous Reception) cycle of a UE applicable to the present disclosure.
  • the terminal may be in an RRC_CONNECTED state.
  • the terminal may perform the DRX operation while performing the procedures and/or methods described/suggested above.
  • a terminal in which DRX is configured can reduce power consumption by discontinuously receiving DL signals.
  • DRX may be performed in Radio Resource Control (RRC)_IDLE state, RRC_INACTIVE state, and RRC_CONNECTED state.
  • RRC_IDLE state and RRC_INACTIVE state the DRX is used to receive paging signals discontinuously.
  • RRC_CONNECTED DRX DRX performed in the RRC_CONNECTED state will be described (RRC_CONNECTED DRX).
  • a DRX cycle consists of On Duration and Opportunity for DRX.
  • the DRX cycle defines a time interval in which On Duration is periodically repeated.
  • On Duration represents a time period during which the UE monitors to receive the PDCCH.
  • the UE performs PDCCH monitoring during On Duration. If there is a PDCCH successfully detected during PDCCH monitoring, the UE operates an inactivity timer and maintains an awake state. On the other hand, if there is no PDCCH successfully detected during PDCCH monitoring, the terminal enters a sleep state after the On Duration is over. Accordingly, when DRX is configured, PDCCH monitoring/reception may be discontinuously performed in the time domain in performing the procedure and/or method described/proposed above.
  • a PDCCH reception opportunity (eg, a slot having a PDCCH search space) in the present disclosure may be set discontinuously according to the DRX configuration.
  • PDCCH monitoring/reception may be continuously performed in the time domain in performing the procedures and/or methods described/proposed above.
  • a PDCCH reception opportunity (eg, a slot having a PDCCH search space) may be continuously set in the present disclosure.
  • PDCCH monitoring may be restricted in a time period set as a measurement gap.
  • Table 41 shows the process of the terminal related to the DRX (RRC_CONNECTED state).
  • DRX configuration information is received through higher layer (eg, RRC) signaling, and whether DRX ON/OFF is controlled by a DRX command of the MAC layer.
  • RRC Radio Resource Control
  • the UE may discontinuously perform PDCCH monitoring in performing the procedure and/or method described/suggested in the present disclosure, as illustrated in FIG. 26.
  • the MAC-CellGroupConfig includes configuration information required to set a medium access control (MAC) parameter for a cell group.
  • MAC-CellGroupConfig may also include configuration information about DRX.
  • MAC-CellGroupConfig defines DRX, and may include information as follows.
  • -Value of drx-InactivityTimer Defines the length of the time interval in which the UE is awake after the PDCCH opportunity in which the PDCCH indicating initial UL or DL data is detected
  • -Value of drx-HARQ-RTT-TimerDL Defines the length of the maximum time interval from receiving the initial DL transmission until the DL retransmission is received.
  • the UE performs PDCCH monitoring at every PDCCH opportunity while maintaining the awake state.
  • FIG. 27 is a diagram briefly showing the operation of a terminal and a base station according to an example of the present disclosure
  • FIG. 28 is a flowchart of an operation of a terminal according to an example of the present disclosure
  • FIG. 29 is an operation of a base station according to an example of the present disclosure It is a flow chart.
  • the base station may transmit configuration information related to beam management (BM) to the terminal (S2710 and S2910).
  • the terminal may receive configuration information related to the BM from the base station (S2710, S2810).
  • the setting information may include at least one of the following.
  • Second report setting information configured to report beam quality information related to a certain number of beams in order from the first beam having the highest beam quality
  • the configuration information may include (i) CMR information related to each beam, and (ii) interference measurement resource (IMR) information related to each beam.
  • IMR interference measurement resource
  • the configuration information may be transmitted through at least one or more of higher layer signaling or downlink control information (DCI).
  • DCI downlink control information
  • the configuration information may be transmitted based on a combination of higher layer signaling and DCI.
  • the terminal may receive the reference signal(s) from the base station (S2720 and S2820).
  • the base station may transmit the reference signal(s) to the terminal (S2720 and S2920).
  • the reference signal is a channel state information reference signal (CSI-RS), or a synchronization signal physical broadcast channel block (SS/PBCH block or SSB) It may include at least one or more of.
  • CSI-RS channel state information reference signal
  • SS/PBCH block or SSB synchronization signal physical broadcast channel block
  • the UE may receive PUCCH power control information including delta function information related to the PUCCH format for physical uplink control channel (PUCCH) transmission from the base station (S2730, S2830).
  • PUCCH power control information may be received through higher layer signaling.
  • the PUCCH power control information may be received prior to, concurrently, or following the above-described setting information, reference signal, and the like, according to an embodiment.
  • the base station may transmit the PUCCH power control information to the terminal (S2630 and S2830).
  • the terminal may determine beam information based on the received reference signal (S2740 and S2840).
  • the UE may determine the PUCCH transmission power based on the received PUCCH power control information.
  • the terminal may report beam information to the base station through PUCCH based on the determined PUCCH transmission power (S2750 and S2850).
  • the base station may receive the beam information from the terminal through a PUCCH having transmission power based on the transmission power control information (S2750 and S2940).
  • the beam quality information may include one of the following.
  • the beam quality information may include at least one of RSRP information related to each of the reporting beams or SINR information related to each of the reporting beams. .
  • the channel state information is (i) the first 1 beam quality information, and (ii) third beam quality information related to N-1 third beams having a higher beam quality after the first beam.
  • N may be a natural number of 2 or more.
  • the channel state information includes (i) the first beam quality information, (ii) the second beam quality information related to the second beam having the same CMR as the first beam and having the lowest beam quality, and (iii) the After the first beam, third beam quality information related to a third beam having the highest beam quality may be included.
  • SINR information related to each reported beam is the It may be calculated based on the interference power determined by averaging the power of one or more ports for interference measurement resources (IMR) related to each reported beam.
  • IMR interference measurement resources
  • the SINR information related to the specific beam will be calculated based on the interference power determined based on the CMR related to the specific beam. I can.
  • SINR signal to interference plus noise ratio
  • the beam quality information including signal to interference plus noise ratio (SINR) information associated with each of the reported beams
  • SINR signal to interference plus noise ratio
  • the SINR information related to the specific beam is calculated based on the interference power determined by averaging the interference power from the at least one IMR related to the CMR. Can be.
  • the channel state information is It may further include related CMR information and interference measurement resource (IMR) information.
  • SINR signal to interference plus noise ratio
  • IMR interference measurement resource
  • the UE and the base station may perform the aforementioned CSI transmission/reception operation based on the aforementioned initial access or random access, DRX configuration, and the like.
  • a rule can be defined so that the base station informs the UE through a predefined signal (eg, a physical layer signal or a higher layer signal). have.
  • Embodiments of the present disclosure can be applied to various wireless access systems.
  • various wireless access systems there is a 3rd Generation Partnership Project (3GPP) or a 3GPP2 system.
  • 3GPP 3rd Generation Partnership Project
  • Embodiments of the present disclosure can be applied not only to the various wireless access systems, but also to all technical fields to which the various wireless access systems are applied.
  • the proposed method can be applied to a mmWave communication system using an ultra-high frequency band.
  • embodiments of the present disclosure may be applied to various applications such as free-running vehicles and drones.

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Abstract

La présente invention concerne un procédé de rapport d'informations d'état de canal d'un terminal associé à la gestion de faisceau (BM), ainsi qu'un terminal et une station de base prenant en charge le procédé. Selon un mode de réalisation de la présente invention, un terminal peut recevoir des informations de commande de puissance de canal de commande de liaison montante physique (PUCCH) pour une transmission PUCCH à partir d'une station de base et rapporter, à la station de base, des informations d'état de canal comprenant des informations de qualité de faisceau déterminées sur la base de la configuration de la station de base, par l'intermédiaire d'un PUCCH déterminé sur la base des informations de commande de puissance de PUCCH. En réponse, la station de base peut commander un ou plusieurs faisceaux fournissant un service au terminal en utilisant les informations d'état de canal rapportées.
PCT/KR2020/001088 2019-03-29 2020-01-22 Procédé de rapport d'informations d'état de canal d'un terminal sur la base d'une commande de puissance d'un canal de commande de liaison montante dans un système de communication sans fil, ainsi que terminal et station de base prenant en charge le procédé WO2020204323A1 (fr)

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