WO2020204520A1 - Procédé pour effectuer une transmission de liaison montante, équipement utilisateur, dispositif, support d'informations et procédé et station de base pour effectuer une réception de liaison montante - Google Patents

Procédé pour effectuer une transmission de liaison montante, équipement utilisateur, dispositif, support d'informations et procédé et station de base pour effectuer une réception de liaison montante Download PDF

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Publication number
WO2020204520A1
WO2020204520A1 PCT/KR2020/004309 KR2020004309W WO2020204520A1 WO 2020204520 A1 WO2020204520 A1 WO 2020204520A1 KR 2020004309 W KR2020004309 W KR 2020004309W WO 2020204520 A1 WO2020204520 A1 WO 2020204520A1
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Prior art keywords
resource
information
uplink
pattern information
resource allocation
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PCT/KR2020/004309
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English (en)
Korean (ko)
Inventor
배덕현
양석철
이현호
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엘지전자 주식회사
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Publication of WO2020204520A1 publication Critical patent/WO2020204520A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling

Definitions

  • the present disclosure relates to a wireless communication system.
  • eMBB enhanced mobile broadband
  • RAT legacy radio access technology
  • massive machine type communication for providing various services anytime, anywhere by connecting a plurality of devices and objects to each other is one of the major issues to be considered in next-generation communication.
  • the base station transmits up/downlink data and/or up/downlink control information to/from the UE(s) using finite radio resources.
  • a new scheme for efficient reception/transmission is required. In other words, as the density of the node increases and/or the density of the UE increases, there is a need for a method for efficiently using high density nodes or high density user devices for communication.
  • Various examples of the present disclosure may provide a method of transmitting and receiving a signal in a wireless communication system and an apparatus supporting the same.
  • a method for a user equipment to transmit an uplink signal in a wireless communication system comprising: receiving resource allocation information; Receive resource pattern information; And transmitting the uplink signal in an uplink resource based on the resource allocation information, and based on not receiving information on the use of the resource pattern information, the uplink resource is in the resource allocation information Including a plurality of resource elements based, based on receiving the information on the use of the resource pattern information, the uplink resource is based on the resource pattern information among the plurality of resource elements based on the resource allocation information
  • an apparatus for a user equipment in a wireless communication system comprising: at least one processor; And at least one memory (memory) operably connected to the at least one or more processors to store at least one or more instructions for causing the at least one or more processors to perform operations, wherein the operations are: resource Receive allocation information; Receive resource pattern information; And transmitting the uplink signal in an uplink resource based on the resource allocation information, and based on not receiving information on the use of the resource pattern information, the uplink resource is in the resource allocation information Including a plurality of resource elements based, based on receiving the information on the use of the resource pattern information, the uplink resource is based on the resource pattern information among the plurality of resource elements based on the resource allocation information It is a device that includes other resource elements excluding at least one resource element.
  • a user equipment for transmitting an uplink signal in a wireless communication system comprising: at least one transceiver; At least one processor; And at least one memory (memory) operatively connected to the at least one or more processors to store at least one or more instructions for causing the at least one or more processors to perform operations, wherein the operations include: resource Receive allocation information; Receive resource pattern information; And transmitting the uplink signal in an uplink resource based on the resource allocation information, and based on not receiving information on the use of the resource pattern information, the uplink resource is in the resource allocation information Including a plurality of resource elements based, based on receiving the information on the use of the resource pattern information, the uplink resource is based on the resource pattern information among the plurality of resource elements based on the resource allocation information It is a user device that includes other resource elements excluding at least one resource element.
  • a computer-readable storage medium wherein the computer-readable storage medium, when executed by at least one or more processors, causes the at least one or more processors to perform operations for a user device.
  • a method for a base station to receive an uplink signal in a wireless communication system comprising: transmitting resource allocation information; Transmit resource pattern information; And receiving the uplink signal from an uplink resource based on the resource allocation information, and based on not transmitting information about use of the resource pattern information, the uplink resource is in the resource allocation information Including a plurality of resource elements based, and based on transmitting the information on the use of the resource pattern information, the uplink resource is based on the resource pattern information among the plurality of resource elements based on the resource allocation information
  • a base station for receiving an uplink signal in a wireless communication system, comprising: at least one processor; And at least one memory (memory) operatively connected to the at least one or more processors to store at least one or more instructions for causing the at least one or more processors to perform operations, wherein the operations include: resource Transmit allocation information; Transmit resource pattern information; And receiving the uplink signal from an uplink resource based on the resource allocation information, and based on not transmitting information about use of the resource pattern information, the uplink resource is in the resource allocation information Including a plurality of resource elements based, and based on transmitting the information on the use of the resource pattern information, the uplink resource is based on the resource pattern information among the plurality of resource elements based on the resource allocation information It is a base station that includes other resource elements excluding at least one resource element.
  • the resource pattern information includes bitmap information for at least one symbol including the at least one resource element based on the resource pattern information, and at least one resource block including the at least one resource element based on the resource pattern information Resource block bitmap information for (resource block) may be included.
  • the method may further include puncturing the at least one resource element based on the resource pattern information, based on receiving the information on the use of the resource pattern information.
  • the method may further include rate-matching the at least one resource element based on the resource pattern information based on receiving the information on the use of the resource pattern information.
  • the resource pattern information may be received through radio resource control (RRC) signaling.
  • RRC radio resource control
  • the information on the use of the resource pattern information may be received through a downlink signal.
  • the resource allocation information may be a configured grant.
  • a wireless communication signal may be efficiently transmitted/received. Accordingly, the overall throughput of the wireless communication system can be increased.
  • a delay/latency occurring during wireless communication between communication devices may be reduced.
  • FIG 1 shows an example of communication system 1 to which implementations of the present disclosure are applied.
  • FIG. 2 is a block diagram illustrating examples of communication devices capable of performing a method according to the present disclosure.
  • 3 illustrates another example of a wireless device capable of performing implementation(s) of the present disclosure.
  • 3GPP 3rd generation partnership project
  • FIG 5 illustrates a random access process that can be applied to the implementation(s) of the present disclosure.
  • DRX discontinuous reception
  • FIG. 7 shows an example of a frame structure usable in a 3GPP-based wireless communication system.
  • FIG. 9 illustrates a slot structure that can be used in a 3GPP-based system.
  • FIG. 10 illustrates an example of PDSCH time domain resource allocation by PDCCH and an example of PUSCH time domain resource allocation by PDCCH.
  • HARQ-ACK hybrid automatic repeat request-acknowledgement
  • FIG 12 illustrates an uplink/downlink transmission process for various examples of the present disclosure.
  • FIG. 13 is for explaining a DMRS symbol mapping method according to an example of the present disclosure.
  • FIG. 14 is a diagram illustrating resources allocated from a base station according to an example of the present disclosure.
  • 19 to 22 illustrate DMRS symbols determined according to various examples of the present disclosure.
  • 23 is a flowchart of a method for transmitting an uplink signal by a user equipment according to an example of the present disclosure.
  • 24 is a flowchart of an uplink reception method of a base station according to an example of the present disclosure.
  • 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.
  • 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 MC-FDMA (multi carrier frequency division multiple access) system, and the like.
  • CDMA may be implemented in a radio technology such as Universal Terrestrial Radio Access (UTRA) or CDMA2000.
  • UTRA Universal Terrestrial Radio Access
  • TDMA may be implemented in a radio technology such as Global System for Mobile communication (GSM), General Packet Radio Service (GPRS), Enhanced Data Rates for GSM Evolution (EDGE) (ie, GERAN).
  • OFDMA may be implemented in wireless technologies such as Institute of Electrical and Electronics Engineers (IEEE) 802.11 (WiFi), IEEE 802.16 (WiMAX), IEEE802-20, and evolved-UTRA (E-UTRA).
  • IEEE Institute of Electrical and Electronics Engineers
  • WiFi WiFi
  • WiMAX IEEE 802.16
  • E-UTRA evolved-UTRA
  • UTRA is a part of Universal Mobile Telecommunication System (UMTS)
  • 3GPP 3rd Generation Partnership Project
  • LTE Long Term Evolution
  • 3GPP LTE adopts OFDMA in downlink (DL) and SC-FDMA in uplink (UL).
  • LTE-advanced (LTE-A) is an evolved form of 3GPP LTE.
  • the following description will be made on the assumption that the present disclosure is applied to a 3GPP-based communication system, for example, LTE and NR.
  • a 3GPP-based communication system for example, LTE and NR.
  • the technical features of the present disclosure are not limited thereto.
  • the following detailed description is described based on a mobile communication system corresponding to a 3GPP LTE/NR system, it can also be applied to any other mobile communication system, except for items specific to 3GPP LTE/NR. Do.
  • 3GPP LTE standard documents for example, 3GPP TS 36.211, 3GPP TS 36.212, 3GPP TS 36.213, 3GPP TS 36.321, 3GPP TS 36.300 and 3GPP TS 36.331 and the like
  • 3GPP NR standard documents for example, 3GPP TS 38.211, 3GPP TS 38.212, 3GPP TS 38.213, 3GPP TS 38.214, 3GPP TS 38.300, 3GPP TS 38.321, 3GPP TS 38.331, and the like.
  • the expression "assumes" by the device may mean that the subject transmitting the channel transmits the channel so as to conform to the "assumption”.
  • the subject receiving the channel may mean that the channel is received or decoded in a form conforming to the “assuming” under the premise that the channel is transmitted to conform to the “assuming”.
  • a channel is punctured in a specific resource means that the signal of the channel is mapped to the specific resource in the resource mapping process of the channel, but a signal mapped to the punctured resource when the channel is transmitted. It means that the part is transmitted without being excluded.
  • the specific resource to be punctured is counted as the resource of the corresponding channel during the resource mapping process of the corresponding channel, the signal mapped to the specific resource among the signals of the corresponding channel is not actually transmitted.
  • the receiving device of the corresponding channel receives, demodulates or decodes the corresponding channel assuming that the signal portion mapped to the punctured specific resource is not transmitted.
  • a channel when a channel is rate-matched in a specific resource, it means that the channel is not mapped to the specific resource at all in the resource mapping process of the channel, and thus is not used for transmission of the channel.
  • the rate-matched specific resource is not counted as a resource of the corresponding channel at all during the resource mapping process of the corresponding channel.
  • the receiving device of the corresponding channel receives, demodulates or decodes the corresponding channel, assuming that the rate-matched specific resource is not used for mapping and transmission of the corresponding channel at all.
  • the UE may be fixed or mobile, and various devices that transmit and/or receive user data and/or various control information by communicating with a base station (BS) belong to this.
  • the UE includes (Terminal Equipment), MS (Mobile Station), MT (Mobile Terminal), UT (User Terminal), SS (Subscribe Station), wireless device, PDA (Personal Digital Assistant), and wireless modem. ), handheld device, etc.
  • a BS generally refers to a fixed station that communicates with a UE and/or another BS, and exchanges various data and control information by communicating with the UE and other BSs.
  • BS may be referred to as other terms such as ABS (Advanced Base Station), NB (Node-B), eNB (evolved-NodeB), BTS (Base Transceiver System), Access Point (Access Point), PS (Processing Server).
  • the base station of UTRAN is called Node-B
  • the base station of E-UTRAN is called eNB
  • the base station of new radio access technology network is called gNB.
  • the base station is collectively referred to as a BS regardless of the type or version of the communication technology.
  • a node refers to a fixed point at which a radio signal can be transmitted/received by communicating with a UE.
  • Various types of BSs can be used as nodes regardless of their name.
  • BS, NB, eNB, pico-cell eNB (PeNB), home eNB (HeNB), relay, repeater, and the like may be nodes.
  • the node may not have to be a BS.
  • it may be a radio remote head (RRH) or a radio remote unit (RRU).
  • RRH, RRU, etc. generally have a power level lower than the power level of the BS.
  • RRH or RRU or less, RRH/RRU is generally connected to the BS by a dedicated line such as an optical cable, so RRH/RRU and BS are generally compared to cooperative communication by BSs connected by wireless lines. By cooperative communication can be performed smoothly.
  • At least one antenna is installed in one node.
  • the antenna may mean a physical antenna, or an antenna port, a virtual antenna, or an antenna group. Nodes are also called points.
  • a cell refers to a certain geographic area in which one or more nodes provide communication services. Accordingly, in the present disclosure, communication with a specific cell may mean communication with a BS or a node that provides a communication service to the specific cell.
  • the downlink/uplink signal of a specific cell means a downlink/uplink signal from/to a BS or a node that provides a communication service to the specific cell.
  • a cell that provides uplink/downlink communication services to a UE is specifically referred to as a serving cell.
  • the channel state/quality of a specific cell refers to a channel state/quality of a channel or communication link formed between a BS or a node and a UE providing a communication service to the specific cell.
  • the UE determines the downlink channel state from a specific node, CRS(s) transmitted on a CRS (Cell-specific Reference Signal) resource allocated to the specific node by the antenna port(s) of the specific node, and / Or it can be measured using CSI-RS(s) transmitted on a Channel State Information Reference Signal (CSI-RS) resource.
  • CRS Cell-specific Reference Signal
  • the 3GPP-based communication system uses the concept of a cell to manage radio resources, and a cell associated with a radio resource is distinguished from a cell in a geographic area.
  • the “cell” in the geographic area may be understood as coverage in which a node can provide a service using a carrier, and the “cell” of a radio resource is a bandwidth (a frequency range configured by the carrier). bandwidth, BW). Since downlink coverage, which is a range in which a node can transmit a valid signal, and uplink coverage, which is a range in which a valid signal can be received from a UE, is dependent on the carrier that carries the signal, the node's coverage is used by the node. It is also associated with the coverage of the "cell" of the radio resource to be used. Therefore, the term "cell” can sometimes be used to mean coverage of a service by a node, sometimes a radio resource, and sometimes a range within which a signal using the radio resource can reach a valid strength.
  • the 3GPP communication standard uses the concept of a cell to manage radio resources.
  • the term "cell" associated with radio resources is defined as a combination of downlink resources (DL resources) and uplink resources (UL resources), that is, a combination of a DL component carrier (CC) and a UL CC. .
  • the cell may be configured with a DL resource alone or a combination of a DL resource and a UL resource.
  • DL resources downlink resources
  • UL resources uplink resources
  • the cell may be configured with a DL resource alone or a combination of a DL resource and a UL resource.
  • the linkage between the carrier frequency of the DL resource (or, DL CC) and the carrier frequency of the UL resource (or UL CC) is indicated by system information Can be.
  • a combination of a DL resource and a UL resource may be indicated by a system information block type 2 (SIB2) linkage.
  • SIB2 system information block type 2
  • the carrier frequency may be the same as or different from the center frequency of each cell or CC.
  • CA carrier aggregation
  • the UE has only one radio resource control (RRC) connection with the network.
  • RRC radio resource control
  • One serving cell provides non-access stratum (NAS) mobility information at RRC connection establishment/re-establishment/handover, and one serving cell Provides a security input when re-establishing an RRC connection/handover.
  • NAS non-access stratum
  • Pcell primary cells
  • the Pcell is a cell operating on a primary frequency at which the UE performs an initial connection establishment procedure or initiates a connection re-establishment procedure.
  • secondary cells may be configured to form a set of serving cells together with the Pcell.
  • Scell is a cell that can be set after RRC (Radio Resource Control) connection establishment is made, and provides additional radio resources in addition to the resources of a special cell (SpCell).
  • a carrier corresponding to a Pcell is called a downlink primary CC (DL PCC)
  • a carrier corresponding to a Pcell in uplink is called a UL primary CC (DL PCC).
  • a carrier corresponding to the Scell in downlink is referred to as a DL secondary CC (DL SCC)
  • a carrier corresponding to the Scell in uplink is referred to as a UL secondary CC (UL SCC).
  • the term SpCell refers to a Pcell of a master cell group (MCG) or a Pcell of a secondary cell group (SCG).
  • MCG master cell group
  • SCG secondary cell group
  • the MCG is a group of serving cells associated with a master node (eg, BS) and consists of SpCell (Pcell) and optionally (optionally) one or more Scells.
  • the SCG is a subset of serving cells associated with the secondary node, and consists of a PSCell and zero or more Scells.
  • serving cells In the case of a UE in the RRC_CONNECTED state that is not set to CA or DC, there is only one serving cell composed of only Pcell. In the case of a UE in the RRC_CONNECTED state set to CA or DC, the term serving cells refers to a set of cells consisting of SpCell(s) and all Scell(s). In DC, two MAC entities, one medium access control (MAC) entity for MCG and one MAC entity for SCG, are configured in the UE.
  • MAC medium access control
  • a Pcell PUCCH group consisting of a Pcell and zero or more Scells and an Scell PUCCH group consisting of only Scell(s) may be configured.
  • an Scell an Scell (hereinafter referred to as a PUCCH cell) through which a PUCCH associated with a corresponding cell is transmitted may be configured.
  • the Scell indicated by the PUCCH Scell belongs to the Scell PUCCH group, and the PUCCH transmission of the related UCI is performed on the PUCCH Scell, and the Scell whose PUCCH Scell is not indicated or the cell indicated as a PUCCH transmission cell is a Pcell belongs to the Pcell PUCCH group, and the PUCCH transmission of related UCI is performed on the Pcell.
  • a UE receives information from a BS through a downlink (DL), and the UE transmits information to the BS through an uplink (UL).
  • the information transmitted and/or received by the BS and the UE includes data and various control information, and various physical channels exist according to the type/use of the information they transmit and/or receive.
  • 3GPP-based communication standards include downlink physical channels corresponding to resource elements carrying information originating from higher layers, and downlink physical channels corresponding to resource elements used by the physical layer but not carrying information originating from higher layers.
  • Link physical signals are defined.
  • a physical downlink shared channel (PDSCH), a physical broadcast channel (PBCH), a physical downlink control channel (PDCCH), etc. are the downlink physical channels.
  • PBCH physical broadcast channel
  • PDCCH physical downlink control channel
  • a reference signal and a synchronization signal are defined as downlink physical signals.
  • a reference signal (RS) also referred to as a pilot, refers to a signal of a predefined special waveform that the BS and the UE know each other.
  • a demodulation reference signal (DMRS), channel state information RS (channel state information RS, CSI-RS), etc.
  • 3GPP-based communication standards include uplink physical channels corresponding to resource elements carrying information originating from an upper layer, and uplink physical channels corresponding to resource elements used by the physical layer but not carrying information originating from an upper layer.
  • Link physical signals are defined.
  • PUSCH physical uplink shared channel
  • PUCCH physical uplink control channel
  • PRACH physical random access channel
  • DMRS demodulation reference signal
  • SRS sounding reference signal
  • PDCCH Physical Downlink Control CHannel
  • PDSCH Physical Downlink Shared CHannel
  • DCI Downlink Control Information
  • PUCCH Physical Uplink Control CHannel
  • PUSCH Physical Uplink Shared CHannel
  • PRACH Physical Random Access CHannel
  • UCI Uplink Control Information
  • uplink data time-frequency carrying a random access signal It means a collection of resources.
  • the expression that the user equipment transmits/receives PUCCH/PUSCH/PRACH is used in the same sense as transmitting/receiving uplink control information/uplink data/random access signals on or through PUSCH/PUCCH/PRACH, respectively.
  • the expression that the BS transmits/receives PBCH/PDCCH/PDSCH is used in the same meaning as transmitting broadcast information/downlink data/downlink control information on or through PBCH/PDCCH/PDSCH, respectively.
  • eMBB enhanced mobile broadband
  • RAT radio access technology
  • massive MTC massive MTC
  • mMTC massive MTC
  • a communication system design considering a service/UE sensitive to reliability and latency is being discussed.
  • URLLC Ultra-Reliable and Low Latency Communication
  • a communication system 1 applied to the present disclosure includes a wireless device, a BS, and a network.
  • the wireless device refers to a device that performs communication using wireless access technology (eg, 5G NR (New RAT), LTE (eg, E-UTRA)), 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 BS and the network may be implemented as a wireless device, and a specific wireless device 200a may operate as a BS/network node to another wireless device.
  • the wireless devices 100a to 100f may be connected to the network 300 through the BS 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 BS 200/network 300, but may perform direct communication (e.g. sidelink communication) without passing through the BS/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 and 150b may be achieved between the wireless devices 100a to 100f/BS 200 to the BS 200/wireless devices 100a to 100f.
  • wireless communication/connection may be performed through various wireless access technologies (eg, 5G NR) for uplink/downlink communication 150a and sidelink communication 150b (or D2D communication).
  • 5G NR wireless access technologies
  • the wireless device and the BS/wireless device may transmit/receive wireless signals to each other.
  • various configuration information setting processes for transmission/reception of radio signals various signal processing processes (e.g., channel encoding/decoding, modulation/demodulation, resources) Mapping/demapping, etc.), resource allocation process, etc. may be performed.
  • the first wireless device 100 and the second wireless device 200 may transmit and/or receive wireless signals through various wireless access technologies (eg, LTE, NR).
  • ⁇ the first wireless device 100, the second wireless device 200 ⁇ is the ⁇ wireless device 100x, BS 200 ⁇ and/or ⁇ wireless device 100x, wireless device 100x) of FIG. 1 ⁇ 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 functions, procedures, and/or methods described/suggested above.
  • 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 store software code including instructions for performing some or all of the processes controlled by the processor 102, or performing the previously described/suggested procedures and/or methods.
  • 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 connected to the processor 102 and may transmit and/or receive radio signals through one or more antennas 108.
  • the transceiver 106 may comprise 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 functions, procedures, and/or methods described/suggested above. For example, 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.
  • the memory 204 may store software code including instructions for performing some or all of the processes controlled by the processor 202, or performing the procedures and/or methods described/suggested above.
  • 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 mixed 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.
  • the one or more processors 102, 202 may include one or more layers (e.g., a physical (PHY) layer, a medium access control (MAC) layer, a radio link control (RLC) layer).
  • PHY physical
  • MAC medium access control
  • RLC radio link control
  • a packet data convergence protocol (PDCP) layer, a radio resource control (RRC) layer, and a functional layer such as a service data adaption protocol (SDAP) may be implemented.
  • PDCP packet data convergence protocol
  • RRC radio resource control
  • SDAP service data adaption protocol
  • One or more processors (102, 202) are one or more protocol data unit (protocol data unit (PDU)) and / or one or more service data unit (service data unit, SDU) according to the functions, procedures, proposals and / or methods disclosed in this document. ) Can be created.
  • One or more processors 102 and 202 may generate messages, control information, data, or information according to functions, procedures, suggestions and/or methods disclosed herein.
  • At least one processor (102, 202) is PDU, SDU, message, control information, data or signals containing information (e.g., baseband signals) in accordance with the functions, procedures, proposals and/or methods disclosed herein.
  • One or more processors (102, 202) may receive signals (e.g., baseband signals) from one or more transceivers (106, 206), and PDU, SDU according to the functions, procedures, proposals and/or methods disclosed herein. , Messages, control information, data or information can be obtained.
  • signals e.g., baseband signals
  • transceivers 106, 206
  • PDU Packet Data Unit
  • 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
  • Firmware or software configured to perform the functions, procedures, proposals and/or methods disclosed herein are included in one or more processors 102, 202, or stored in one or more memories 104, 204, and 202).
  • the functions, procedures, proposals and or methods 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.
  • the one or more transceivers 106 and 206 may receive user data, control information, radio signals/channels, and the like described in the functions, procedures, proposals, methods and/or operational flow charts disclosed herein from one or more other devices.
  • one or more transceivers 106, 206 may be coupled with one or more processors 102, 202, and may transmit and/or 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 to one or more antennas (108, 208), one or more transceivers (106, 206) through one or more antennas (108, 208) functions and procedures disclosed in this document. It may be configured to transmit and/or receive user data, control information, radio signals/channels, etc. mentioned in the proposal, method and/or operation flow chart.
  • 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.
  • 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 It can be composed of (module).
  • 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.
  • the communication circuit 112 may include one or more processors 102 and 202 and/or one or more memories 104 and 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
  • Fig. 1, 100f digital broadcast UE, hologram device, public safety device, MTC device, medical device, fintech device (or financial device), security device, climate/environment
  • It may be implemented in the form of a device, an AI server/device (Fig. 1, 400), a BS (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.
  • At least one memory may store instructions or programs, and the instructions or programs are at least operably connected to the at least one memory when executed. It may cause one processor to perform operations according to some examples or implementations of the present disclosure.
  • a computer readable storage medium may store at least one instruction or computer program, and the at least one instruction or computer program is executed by at least one processor. It may cause one processor to perform operations according to some examples or implementations of the present disclosure.
  • a processing device or apparatus may include at least one processor and at least one computer memory connectable to the at least one processor.
  • the at least one computer memory may store instructions or programs, and the instructions or programs, when executed, cause at least one processor operably connected to the at least one memory to cause some of the present disclosure. It may be to perform operations according to examples or implementations.
  • 3GPP-based communication system which is an example of a wireless communication system, and a signal transmission/reception process using them.
  • the UE which has been powered on again while the power is turned off, or disconnected from the wireless communication system, first searches for a suitable cell to camp on (search cell) and synchronizes with the cell or the BS of the cell, etc.
  • An initial cell search process is performed (S11).
  • the UE receives a synchronization signal block (SSB) (also referred to as an SSB/PBCH block) from the BS.
  • the SSB includes a primary synchronization signal (PSS), a secondary synchronization signal (SSS), and a physical broadcast channel (PBCH).
  • PSS primary synchronization signal
  • SSS secondary synchronization signal
  • PBCH physical broadcast channel
  • the UE synchronizes with the base station based on the PSS/SSS and obtains information such as a cell identifier (identity, ID).
  • the UE may obtain intra-cell broadcast information based on the PBCH.
  • the UE may receive a downlink reference signal (DL RS) during an initial cell
  • the UE can camp on the corresponding cell. After camping on the cell, the UE monitors the PDCCH on the cell and receives the PDSCH according to the downlink control information (DCI) carried by the PDCCH to obtain more specific system information (SI). Can be (S12).
  • DCI downlink control information
  • SI system information
  • MIB master information block
  • SIB system information blocks
  • the MIB includes information/parameters related to system information block type 1 (SystemInformationBlockType1, SIB1) reception and is transmitted through PBCH in SSB.
  • SystemInformationBlockType1, SIB1 system information block type 1
  • the UE Upon initial cell selection, the UE assumes that the half-frame with SSB is repeated in a 20ms period. The UE may check whether there is a control resource set (CORESET) 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 based on information in the MIB (e.g., pdcch-ConfigSIB1) (i) a plurality of consecutive RBs constituting CORESET and one or more consecutive symbols and (ii) PDCCH opportunity (That is, a time domain location for PDCCH reception) can be determined.
  • 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, where x is an integer greater than 1). For example, SIB1 may inform whether SIBx is periodically broadcast or provided by a request of a UE by an on-demand method. 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.
  • SIBx transmission period, SI-window size
  • -SIBx is included in the SI message and is transmitted through PDSCH.
  • Each SI message is transmitted within a periodic time window (ie, SI-window).
  • the UE may perform a random access procedure to complete access to the BS (S13 to S16). For example, in a random access process, the UE transmits a preamble through a physical random access channel (PRACH) (S13), and a random access response to the preamble through a PDCCH and a corresponding PDSCH ( A random access response, RAR) may be received (S14). If reception of the RAR for the UE fails, the UE may attempt to transmit the preamble again.
  • PRACH physical random access channel
  • RAR random access response
  • a contention resolution procedure including transmission of a PUSCH based on UL resource allocation included in the RAR (S15), and reception of a PDCCH and a corresponding PDSCH ( S16) can be performed.
  • the UE may perform PDCCH/PDSCH reception (S17) and PUSCH/PUCCH transmission (S18) as a general uplink/downlink signal transmission process.
  • the control information transmitted by the UE to the BS is collectively referred to as uplink control information (UCI).
  • UCI includes HARQ ACK/NACK (Hybrid Automatic Repeat and ReQuest Acknowledgement/Negative-ACK) (also referred to as HARQ-ACK), scheduling request (SR), channel state information (CSI), and the like.
  • the CSI may include a channel quality indicator (CQI), a precoding matrix indicator (PMI), and/or a rank indicator.
  • UCI is generally transmitted through PUCCH, but may be transmitted through PUSCH when control information and traffic data are to be transmitted simultaneously.
  • the UE may aperiodically transmit UCI through the PUSCH based on the request/instruction of the network.
  • FIG. 5 illustrates a random access process that can be applied to the implementation(s) of the present disclosure.
  • FIG. 5(a) illustrates a 4-step random access process
  • FIG. 5(b) illustrates a 2-step random access process.
  • the random access process can be used in various ways for initial access, uplink synchronization adjustment, resource allocation, handover, radio link reconfiguration after radio link failure, and location measurement.
  • the random access process is classified into a contention-based process and a dedicated (ie, non-contention-based) process.
  • the contention-based random access process is generally used including initial access, and the dedicated random access process is used for handover, when downlink data arrives in the network, and when uplink synchronization is reset in case of location measurement. .
  • the UE randomly selects a random access (RA) preamble. Accordingly, it is possible for a plurality of UEs to simultaneously transmit the same RA preamble, and thus a contention resolution process is required afterwards.
  • the dedicated random access procedure the UE uses the RA preamble uniquely allocated by the BS to the UE. Therefore, the UE can perform a random access procedure without collision with other UEs.
  • the contention-based random access process includes the following four steps.
  • messages transmitted in steps 1 to 4 may be referred to as Msg1 to Msg4, respectively.
  • Step 1 The UE transmits an RA preamble through the PRACH.
  • the UE receives a random access response (RAR) from the BS through the PDSCH.
  • RAR random access response
  • UE transmits UL data to BS through PUSCH based on RAR.
  • the UL data includes layer 2 and/or layer 3 messages.
  • Step 4 The UE receives a contention resolution message from the BS through the PDSCH.
  • the UE may receive information about random access from the BS through the system information. If random access is required, the UE transmits Msg1 (eg, preamble) to the BS on the PRACH.
  • Msg1 eg, preamble
  • the BS may distinguish each random access preamble through a time/frequency resource (RA Occasion, RO) and a random access preamble index (PI) in which the random access preamble is transmitted.
  • RA Occasion, RO time/frequency resource
  • PI random access preamble index
  • the UE For reception of the RAR message, the UE includes the scheduling information for the RAR message within a preset time window (eg, ra-ResponseWindow), CRC-masked L1/ with Random Access-RNTI (RA-RNTI) L2 control channel (PDCCH) is monitored.
  • a preset time window eg, ra-ResponseWindow
  • RA-RNTI Random Access-RNTI
  • PDCCH L2 control channel
  • the UE may receive a RAR message from the PDSCH indicated by the scheduling information. After that, the UE determines whether there is an RAR for itself in the RAR message. Whether there is a RAR for itself may be determined by whether there is a RAPID (Random Access preamble ID) for the preamble transmitted by the UE.
  • RAPID Random Access preamble ID
  • the index of the preamble transmitted by the UE and the RAPID may be the same.
  • the RAR is a corresponding random access preamble index, timing offset information for UL synchronization (eg, timing advance command (TAC), UL scheduling information (eg, UL grant) for Msg3 transmission), and UE temporary identification information ( Yes, including Temporary-C-RNTI, TC-RNTI)
  • TAC timing advance command
  • UL scheduling information eg, UL grant
  • UE temporary identification information Yes, including Temporary-C-RNTI, TC-RNTI
  • Msg3 the ID of the UE (or In addition, Msg3 may contain RRC connection request-related information (eg, RRCSetupRequest message) for initial access to the network
  • the BS is a contention resolution message.
  • Msg4 Transmit Msg4 to the UE
  • TC-RNTI is changed to C-RNTI
  • the ID of the UE and/or RRC connection-related information eg, RRCSetup Message. If the information transmitted through Msg3 and the information received through Msg4 do not match, or if Msg4 is not received for a certain period of time, the UE may report that contention resolution has failed and Msg3 may be retransmitted.
  • the dedicated random access process includes the following three steps.
  • messages transmitted in steps 0 to 2 may be referred to as Msg0 to Msg2, respectively.
  • the dedicated random access procedure may be triggered in the UE by the BS using a PDCCH (hereinafter, PDCCH order) for instructing transmission of an RA preamble.
  • PDCCH order a PDCCH for instructing transmission of an RA preamble.
  • Step 0 The BS allocates an RA preamble to the UE through dedicated signaling.
  • Step 1 The UE transmits an RA preamble through the PRACH.
  • Step 2 The UE receives the RAR through the PDSCH from the BS.
  • steps 1 to 2 of the dedicated random access process may be the same as steps 1 to 2 of the contention-based random access process.
  • NR systems may require lower latency than conventional systems.
  • a 4-step random access process may be undesirable for services that are particularly vulnerable to latency such as URLLC.
  • a low latency random access process may be required within various scenarios of an NR system.
  • the two-step random access process may consist of two steps: MsgA transmission from UE to BS and MsgB transmission from BS to UE.
  • MsgA transmission may include transmission of an RA preamble through a PRACH and transmission of a UL payload through a PUSCH.
  • the PRACH and the PUSCH may be transmitted by time division multiplexing (TDM).
  • TDM time division multiplexing
  • PRACH and PUSCH may be transmitted after frequency division multiplexing (FDM).
  • the BS may transmit MsgB to the UE.
  • MsgB may include RAR for the UE.
  • An RRC connection request related message (eg, an RRCSetupRequest message) requesting to establish a connection between the RRC layer of the BS and the RRC layer of the UE may be included in the payload of MsgA and transmitted.
  • MsgB may be used to transmit RRC connection related information (eg, RRCSetup message).
  • RRC connection request related message (eg, an RRCSetupRequest message) may be transmitted through a PUSCH transmitted based on a UL grant in the MsgB.
  • RRC connection-related information (eg, RRCSetup message) related to the RRC connection request may be transmitted through the PDSCH associated with the PUSCH transmission after the PUSCH transmission based on MsgB.
  • DRX discontinuous reception
  • the UE may perform a DRX operation while performing a process and/or method according to the implementation(s) of the present disclosure.
  • the UE in which DRX is configured may lower power consumption by discontinuously receiving DL signals.
  • DRX may be performed in the RRC_IDLE state, the RRC_INACTIVE state, and the RRC_CONNECTED state.
  • RRC_IDLE state and RRC_INACTIVE state DRX is used for the UE to receive paging signals discontinuously.
  • RRC_CONNECTED DRX DRX performed in the RRC_CONNECTED state will be described (RRC_CONNECTED DRX).
  • the DRX cycle is composed of On Duration and Opportunity for DRX.
  • the DRX cycle defines the time interval at which the on duration is periodically repeated.
  • the on duration represents a time period during which the UE performs PDCCH monitoring 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 UE enters a sleep state after the on duration ends.
  • the UE may perform PDCCH monitoring/reception discontinuously in the time domain. For example, when DRX is set, a PDCCH reception occasion (eg, a slot having a PDCCH search space) in the present disclosure may be set discontinuously according to the DRX configuration.
  • the UE may continuously perform PDCCH monitoring/reception in the time domain. For example, when DRX is not set, a PDCCH reception timing (eg, a slot having a PDCCH search space) in the present disclosure may be continuously set. Meanwhile, regardless of whether or not DRX is set, PDCCH monitoring may be restricted in a time period set as a measurement gap.
  • the following table illustrates the UE process related to DRX.
  • DRX configuration information is received through higher layer (eg, RRC) signaling, and whether DRX ON/OFF is controlled by the DRX command of the MAC layer.
  • RRC higher layer
  • the UE may perform PDCCH monitoring discontinuously, as illustrated in FIG. 6.
  • MAC-CellGroupConfig includes configuration information necessary to configure MAC parameters for a cell group.
  • MAC-CellGroupConfig may also include configuration information about DRX.
  • MAC-CellGroupConfig may include information related to DRX as follows.
  • -Value of drx-InactivityTimer Defines the length of the time interval in which the UE is awake after the PDCCH time when 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 period while maintaining the awake state.
  • FIG. 7 shows an example of a frame structure usable in a 3GPP-based wireless communication system.
  • the structure of the frame of FIG. 7 is only an example, and the number of subframes, the number of slots, and the number of symbols in the frame may be variously changed.
  • OFDM numerology eg, subcarrier spacing, SCS
  • SCS subcarrier spacing
  • the (absolute time) duration of a time resource (eg, a subframe, a slot, or a transmission time interval (TTI)) consisting of may be set differently between aggregated cells, where the symbol is OFDM Symbol (or, cyclic prefix-orthogonal frequency division multiplexing (CP-OFDM) symbol), SC-FDMA symbol (or, discrete Fourier transform-spread-OFDM (discrete Fourier transform-spread-OFDM, DFT-s-OFDM) symbol)
  • CP-OFDM cyclic prefix-orthogonal frequency division multiplexing
  • SC-FDMA symbol or, discrete Fourier transform-spread-OFDM (discrete Fourier transform-spread-OFDM, DFT-s-OFDM) symbol
  • a symbol, an OFDM-based symbol, an OFDM symbol, a CP-OFDM symbol, and a DFT-s-OFDM symbol may be replaced with each other.
  • uplink and downlink transmissions are organized into frames.
  • Each frame has a duration Tf of 10 ms and is divided into two half-frames, each with a duration of 5 ms.
  • Each half-frame consists of five subframes, and the period Tsf of a single subframe is 1 ms.
  • Subframes are further divided into slots, and the number of slots in the subframe depends on the subcarrier spacing.
  • Each slot consists of 14 or 12 OFDM symbols based on a cyclic prefix. In a normal cyclic prefix (CP), each slot is composed of 14 OFDM symbols, and in the case of an extended CP, each slot is composed of 12 OFDM symbols.
  • CP normal cyclic prefix
  • a slot 8 illustrates a resource grid of a slot.
  • a slot contains a plurality of (eg, 14 or 12) symbols in the time domain.
  • a common resource block (CRB) indicated by higher layer signaling e.g., radio resource control (RRC) signaling
  • Nstart a common resource block indicated by higher layer signaling (e.g., radio resource control (RRC) signaling)
  • Nstart ugrid
  • Nsize,ugrid,x is the number of resource blocks (RBs) in the resource grid
  • the subscript x is DL for downlink and UL for uplink.
  • NRBsc is the number of subcarriers per RB, and NRBsc is usually 12 in a 3GPP-based wireless communication system.
  • the carrier bandwidth Nsize,ugrid for the subcarrier spacing setting u is given to the UE by a higher layer parameter (eg, RRC parameter) from the network.
  • RRC parameter resource element
  • Each element in the resource grid for the antenna port p and subcarrier spacing u is referred to as a resource element (RE), and one complex symbol may be mapped to each resource element.
  • RE resource element
  • Each resource element in the resource grid is uniquely identified by an index k in the frequency domain and an index l indicating a symbol position relative to a reference point in the time domain.
  • the RB is defined by 12 consecutive subcarriers in the frequency domain.
  • RBs may be classified into common resource blocks (CRBs) and physical resource blocks (PRBs).
  • CRBs are numbered from 0 upwards in the frequency domain for the subcarrier spacing setting u.
  • the center of subcarrier 0 of CRB 0 for subcarrier spacing setting u coincides with'point A'which is a common reference point for resource block grids.
  • PRBs are defined within a bandwidth part (BWP) and are numbered from 0 to NsizeBWP,i-1, where i is the number of the bandwidth part.
  • nPRB nCRB + NsizeBWP,i, where NsizeBWP,i is a common resource block in which the bandwidth part starts relative to CRB 0.
  • the BWP includes a plurality of consecutive RBs in the frequency domain.
  • the carrier may contain up to N (eg, 5) BWPs.
  • the UE may be configured to have more than one BWP on a given component carrier. Data communication is performed through an activated BWP, and only a predetermined number (eg, one) of BWPs set to the UE may be activated on the corresponding carrier.
  • a UE with carrier aggregation configured may be configured to use one or more cells.
  • the UE When a UE is configured to have a plurality of serving cells, the UE may be configured to have one or a plurality of cell groups.
  • the UE may be configured to have a plurality of cell groups associated with different BSs.
  • the UE may be configured to have a plurality of cell groups associated with a single BS.
  • Each cell group of the UE is composed of one or more serving cells, and each cell group includes a single PUCCH cell in which PUCCH resources are configured.
  • the PUCCH cell may be a Pcell or an Scell configured as a PUCCH cell among Scells of a corresponding cell group.
  • Each serving cell of the UE belongs to one of the cell groups of the UE and does not belong to a plurality of cell groups.
  • each slot is a self-contained structure that may include i) a DL control channel, ii) DL or UL data, and/or iii) a UL control channel.
  • a DL control channel ii) DL or UL data
  • a UL control channel iii) DL or UL data
  • a UL control channel iii) DL or UL data
  • a UL control channel UL control channel.
  • N and M are each non-negative integer.
  • a resource region (hereinafter, a data region) between the DL control region and the UL control region may be used for DL data transmission or UL data transmission.
  • the symbols of a single slot may be divided into group(s) of consecutive symbols that can be used as DL, UL, or flexible.
  • information indicating how each of the symbols of the slot is used is referred to as a slot format.
  • the slot format may define which symbols in the slot are used for UL and which symbols are used for DL.
  • the BS may set a pattern for UL and DL allocation for the serving cell through higher layer (eg, RRC) signaling.
  • RRC higher layer
  • -NrofDownlinkSlots providing the number of consecutive full DL slots at the beginning of each DL-UL pattern, wherein the full slot is a slot having only downlink symbols;
  • the remaining symbols that are neither set as DL symbols nor UL symbols are flexible symbols.
  • the UE that has received the configuration for the TDD DL-UL pattern that is, the TDD UL-DL configuration (eg, tdd-UL-DL-ConfigurationCommon, or tdd-UL-DLConfigurationDedicated) through higher layer signaling, is slotted based on the configuration. Set the slot format for each slot across the fields.
  • the TDD UL-DL configuration eg, tdd-UL-DL-ConfigurationCommon, or tdd-UL-DLConfigurationDedicated
  • a predetermined number of combinations may be predefined as slot formats, and the predefined slot formats can be identified by slot format indexes, respectively.
  • I can.
  • the following table illustrates some of the predefined slot formats.
  • D denotes a DL symbol
  • U denotes a UL symbol
  • F denotes a flexible symbol.
  • the BS In order to inform which of the predefined slot formats is used in a specific slot, the BS provides a combination of slot formats applicable to the corresponding serving cell for each cell through higher layer (e.g., RRC) signaling for a set of serving cells.
  • a set of these may be set, and the UE may be configured to monitor a group-common PDCCH for a slot format indicator (SFI)(s) through higher layer (eg, RRC) signaling.
  • SFI DCI slot format indicator
  • DCI format 2_0 is used as the SFI DCI.
  • the BS is the (start) position of the slot format combination ID (i.e., SFI-index) for the corresponding serving cell within the SFI DCI, the slot applicable to the serving cell.
  • a set of format combinations, a reference subcarrier interval setting for each slot format in the slot format combination indicated by the SFI-index value in the SFI DCI may be provided to the UE.
  • One or more slot formats are set for each slot format combination in the set of slot format combinations and a slot format combination ID (ie, SFI-index) is assigned.
  • N slots among slot format indexes for slot formats predefined for the slot format combination (eg, see Table 4) Format indexes can be indicated.
  • the BS informs the UE of the total length of the SFI-RNTI, which is the RNTI used for SFI, and the DCI payload scrambled with the SFI-RNTI to configure the UE to monitor the group-common PDCCH for SFIs.
  • the UE detects the PDCCH based on the SFI-RNTI, the UE may determine the slot format(s) for the corresponding serving cell from the SFI-index for the serving cell among SFI-indexes in the DCI payload within the PDCCH. .
  • Symbols indicated as flexible by the TDD DL-UL pattern configuration may be indicated as uplink, downlink or flexible by SFI DCI. Symbols indicated as downlink/uplink by TDD DL-UL pattern configuration are not overridden as uplink/downlink or flexible by SFI DCI.
  • the UE determines whether each slot is uplink or uplink and the symbol allocation within each slot is SFI DCI and/or DCI scheduling or triggering transmission of downlink or uplink signals (e.g., DCI format 1_0, DCI format 1_1, DCI format 1_2, DCI format 0_0, DCI format 0_1, DCI format 0_2, DCI format 2_3).
  • DCI format 1_0, DCI format 1_1, DCI format 1_2, DCI format 0_0, DCI format 0_1, DCI format 0_2, DCI format 2_3 e.g., DCI format 1_0, DCI format 1_1, DCI format 1_2, DCI format 0_0, DCI format 0_1, DCI format 0_2, DCI format 2_3
  • the PDCCH carries DCI.
  • the PDCCH i.e., DCI
  • the PDCCH is a transmission format and resource allocation of a downlink shared channel (DL-SCH), resource allocation information for an uplink shared channel (UL-SCH), Located above the physical layer among the protocol stacks of UE/BS such as paging information for a paging channel (PCH), system information on the DL-SCH, and random access response (RAR) transmitted on the PDSCH.
  • PCH paging information for a paging channel
  • RAR random access response
  • It carries resource allocation information for a control message of a layer (hereinafter, upper layer), a transmission power control command, and activation/release of configured scheduling (CS).
  • CS configured scheduling
  • DCI includes a cyclic redundancy check (CRC), and the CRC is masked/scrambled with various identifiers (e.g., radio network temporary identifier (RNTI)) according to the owner or usage of the PDCCH. For example, if the PDCCH is for a specific UE, the CRC is masked with a UE identifier (eg, cell RNTI (C-RNTI)) If the PDCCH is for paging, the CRC is masked with a paging RNTI (P-RNTI).
  • C-RNTI radio network temporary identifier
  • the CRC is masked with system information RNTI (system information RNTI, SI-RNTI)). If the PDCCH is for random access response, the CRC is Masked with random access RNTI (RA-RATI).
  • SIB system information block
  • RA-RATI random access RNTI
  • the PDCCH is transmitted through a control resource set (CORESET).
  • CORESET consists of a set of physical resource blocks (PRBs) with a time period of 1 to 3 OFDM symbols. PRBs constituting the CORESET and the CORESET duration may be provided to the UE through higher layer (eg, RRC) signaling.
  • PRBs physical resource blocks
  • RRC higher layer
  • the set of PDCCH candidates within the set CORESET(s) is monitored according to the corresponding search space sets.
  • monitoring implies decoding (aka, blind decoding) each PDCCH candidate in the monitored DCI formats.
  • the set of PDCCH candidates monitored by the UE is defined in terms of PDCCH search space sets.
  • the search space set may be a common search space (CSS) set or a UE-specific search space (USS) set.
  • Each CORESET setting is associated with one or more sets of search spaces, and each set of search spaces is associated with one CORESET setting.
  • the search space set is determined based on the following parameters provided to the UE by the BS.
  • -controlResourceSetId identifies the CORESET associated with the search space set.
  • -monitoringSlotPeriodicityAndOffset indicates slots for PDCCH monitoring set as period and offset.
  • -monitoringSymbolsWithinSlot indicates the first symbol(s) for PDCCH monitoring in slots for PDCCH monitoring.
  • -nrofCandidates indicates the number of PDCCH candidates for each CCE aggregation level.
  • the PDSCH is a physical layer UL channel for UL data transport.
  • the PDSCH carries downlink data (e.g., a DL-SCH transport block), and modulation methods such as Quadrature Phase Shift Keying (QPSK), 16 Quadrature Amplitude Modulation (QAM), 64 QAM, and 256 QAM are applied.
  • a codeword is generated by encoding a transport block (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 may be mapped to one or more layers. Each layer is mapped to a radio resource together with a DMRS to generate an OFDM symbol signal, and is transmitted through a corresponding antenna port.
  • PUCCH means a physical layer UL channel for UCI transmission.
  • PUCCH carries UCI (Uplink Control Information).
  • UCI includes:
  • SR -Scheduling request
  • HARQ-ACK-acknowledgement This is a response to a downlink data packet (eg, codeword) on the PDSCH. Indicates whether a downlink data packet has been successfully received by the communication device.
  • HARQ-ACK 1 bit may be transmitted in response to a single codeword
  • HARQ-ACK 2 bits may be transmitted in response to two codewords.
  • the HARQ-ACK response includes positive ACK (simply, ACK), negative ACK (NACK), DTX or NACK/DTX.
  • the term HARQ-ACK is mixed with HARQ ACK/NACK, ACK/NACK, or A/N.
  • CSI Channel quality information
  • rank indicator rank indicator
  • PMI precoding matrix indicator
  • CSI-RS resource indicator CRI
  • SS /PBCH resource block indicator SSBRI
  • CSI may include a layer indicator (layer indicator, LI).
  • CSI may be divided into CSI part 1 and CSI part 2 according to the UCI type included in the CSI. For example, CRI, RI, and/or CQI for the first codeword may be included in CSI Part 1, and CQI for LI, PMI, and the second codeword may be included in CSI Part 2.
  • PUCCH resources set and/or indicated by the BS to the UE for HARQ-ACK, SR, and CSI transmission are referred to as HARQ-ACK PUCCH resources, SR PUCCH resources, and CSI PUCCH resources, respectively.
  • the PUCCH format may be classified as follows according to the UCI payload size and/or transmission length (eg, the number of symbols constituting the PUCCH resource). For information on the PUCCH format, Table 5 may be referred to.
  • PUCCH format 0 consists of only UCI signals without DMRS, and the UE transmits the UCI state by selecting and transmitting one of a plurality of sequences. For example, the UE transmits a specific UCI to the BS by transmitting one of a plurality of sequences through PUCCH of PUCCH format 0. The UE transmits the PUCCH of PUCCH format 0 in the PUCCH resource for SR configuration corresponding to only when transmitting a positive SR.
  • the setting for PUCCH format 0 includes the following parameters for the corresponding PUCCH resource: an index for initial cyclic transition, the number of symbols for PUCCH transmission, and the first symbol for the PUCCH transmission.
  • DMRS and UCI are set/mapped to different OFDM symbols in the form of TDM. That is, the DMRS is transmitted in a symbol in which a modulation symbol is not transmitted.
  • UCI is expressed by multiplying a specific sequence (eg, orthogonal cover code (OCC)) by a modulation (eg, QPSK) symbol.
  • OCC orthogonal cover code
  • CS cyclic shift
  • CS Code division multiplexing
  • PUCCH format 1 carries UCI with a maximum size of 2 bits, and the modulation symbol is in the time domain. Is spread by an orthogonal cover code (OCC) (which is set differently depending on whether or not frequency hopping).
  • the setting for PUCCH format 1 includes the following parameters for the corresponding PUCCH resource: index for initial cyclic transition, number of symbols for PUCCH transmission, first symbol for PUCCH transmission, orthogonal cover code Index for ).
  • DMRS and UCI are configured/mapped in the form of frequency division multiplex (FDM) within the same symbol.
  • the UE transmits the coded UCI bits by applying only IFFT without DFT.
  • PUCCH format 2 carries UCI of a bit size larger than K bits, and a modulation symbol is transmitted after FDM with DMRS.
  • the DMRS is located at symbol indexes #1, #4, #7, and #10 in a given resource block with a density of 1/3.
  • a pseudo noise (PN) sequence is used for the DMRS sequence. Frequency hopping may be activated for 2-symbol PUCCH format 2.
  • the setting for PUCCH format 2 includes the following parameters for the corresponding PUCCH resource: the number of PRBs, the number of symbols for PUCCH transmission, the first symbol for the PUCCH transmission.
  • DMRS and UCI are set/mapped to different symbols in the form of TDM.
  • the UE transmits by applying DFT to the coded UCI bits.
  • PUCCH format 3 does not support UE multiplexing for the same time-frequency resource (eg, the same PRB).
  • the setting for PUCCH format 3 includes the following parameters for the corresponding PUCCH resource: the number of PRBs, the number of symbols for PUCCH transmission, the first symbol for the PUCCH transmission.
  • DMRS and UCI are set/mapped to different symbols in the form of TDM.
  • PUCCH format 4 can multiplex up to 4 UEs in the same PRB by applying OCC at the front end of the DFT and CS (or interleaved FDM (IFDM) mapping) for DMRS.
  • IFDM interleaved FDM
  • the modulation symbols of UCI are transmitted after DMRS and TDM (Time Division Multiplexing).
  • the configuration for PUCCH format 4 includes the following parameters for the corresponding PUCCH resource: the number of symbols for PUCCH transmission, length for orthogonal cover code, index for orthogonal cover code, first symbol for the PUCCH transmission.
  • the following table illustrates PUCCH formats. Depending on the PUCCH transmission length, it may be divided into short PUCCH (formats 0, 2) and long PUCCH (formats 1, 3, 4).
  • PUCCH resources may be determined for each UCI type (eg, A/N, SR, CSI). PUCCH resources used for UCI transmission may be determined based on UCI (payload) size. For example, the BS configures a plurality of PUCCH resource sets to the UE, and the UE may select a specific PUCCH resource set corresponding to a specific range according to the range of the UCI (payload) size (eg, the number of UCI bits). For example, the UE may select one of the following PUCCH resource sets according to the number of UCI bits (NUCI).
  • NUCI the number of UCI bits
  • K is the number of PUCCH resource sets (K>1)
  • Ni is the maximum number of UCI bits supported by the PUCCH resource set #i.
  • PUCCH resource set #1 may be composed of resources of PUCCH format 0 to 1
  • other PUCCH resource sets may be composed of resources of PUCCH format 2 to 4 (refer to Table 5).
  • the setting for each PUCCH resource includes a PUCCH resource index, a starting PRB index, a setting for one of PUCCH formats 0 to PUCCH 4, and the like.
  • the code rate for multiplexing HARQ-ACK, SR and CSI report(s) in PUCCH transmission using PUCCH format 2, PUCCH format 3, or PUCCH format 4 is set to the UE by the BS through the upper layer parameter maxCodeRate.
  • the upper layer parameter maxCodeRate is used to determine how to feed back UCI on PUCCH resources for PUCCH formats 2, 3 or 4.
  • the PUCCH resource to be used for UCI transmission in the PUCCH resource set may be configured to the UE by the network through higher layer signaling (eg, RRC signaling).
  • the UCI type is HARQ-ACK for the SPS (Semi-Persistent Scheduling) PDSCH
  • the PUCCH resource to be used for UCI transmission within the PUCCH resource set may be set to the UE by the network through higher layer signaling (e.g., RRC signaling).
  • a PUCCH resource to be used for UCI transmission within a PUCCH resource set may be scheduled based on DCI.
  • the BS transmits the DCI to the UE through the PDCCH, and the PUCCH to be used for UCI transmission within a specific PUCCH resource set through the ACK/NACK resource indicator (ARI) in the DCI.
  • Resources can be directed.
  • ARI is used to indicate PUCCH resources for ACK/NACK transmission, and may also be referred to as a PUCCH resource indicator (PUCCH resource indicator, PRI).
  • DCI is a DCI used for PDSCH scheduling, and UCI may include HARQ-ACK for PDSCH.
  • the BS may set a PUCCH resource set consisting of PUCCH resources larger than the number of states that can be represented by the ARI using a (UE-specific) higher layer (eg, RRC) signal.
  • the ARI indicates a PUCCH resource sub-set within the PUCCH resource set, and which PUCCH resource is to be used in the indicated PUCCH resource sub-set is transmission resource information for the PDCCH (e.g., PDCCH start control channel element (control channel element, CCE) index, etc.) based on an implicit rule.
  • the PUSCH carries uplink data (eg, UL-SCH TB) and/or uplink control information (UCI), and is transmitted based on a CP-OFDM waveform or a DFT-s-OFDM waveform.
  • uplink data eg, UL-SCH TB
  • UCI uplink control information
  • the UE transmits the PUSCH by applying transform precoding.
  • the UE transmits a PUSCH based on the CP-OFDM waveform
  • transform precoding e.g., transform precoding When this is enabled
  • the UE may transmit the PUSCH based on the CP-OFDM waveform or the DFT-s-OFDM waveform.
  • PUSCH transmission is dynamically scheduled by the UL grant in the DCI, or semi-static based on higher layer (eg, RRC) signaling (and/or layer 1 (layer 1, L1) signaling (eg, PDCCH))). static).
  • a semi-static scheduled resource assignment is a set grant It is also called (configured grant).
  • PUSCH transmission may be performed based on a codebook or a non-codebook.
  • the UE must have uplink resources available to the UE for UL-SCH data transmission, and must have downlink resources available to the UE for DL-SCH data reception.
  • Uplink resources and downlink resources are assigned to the UE through resource allocation by the BS.
  • Resource allocation may include time domain resource allocation (TDRA) and frequency domain resource allocation (FDRA).
  • uplink resource allocation is also referred to as an uplink grant
  • downlink resource allocation is also referred to as a downlink allocation.
  • the uplink grant is dynamically received on the PDCCH or in the RAR by the UE, or is set semi-persistently to the UE by RRC signaling from the BS.
  • the downlink assignment is dynamically received on the PDCCH by the UE, or is semi-continuously set to the UE by RRC signaling from the BS.
  • the BS may dynamically allocate uplink resources to the UE through PDCCH(s) addressed to a cell radio network temporary identifier (C-RNTI).
  • C-RNTI cell radio network temporary identifier
  • the UE monitors the PDCCH(s) to find possible uplink grant(s) for UL transmission.
  • the BS can allocate uplink resources using a grant set to the UE. Two types of set grants, type 1 and type 2, can be used. In the case of type 1, the BS directly provides a set uplink grant (including a period) through RRC signaling.
  • the BS sets the period of the RRC configured uplink grant through RRC signaling, and the configured scheduling RNTI (configured scheduling RNTI, CS-RNTI) through the PDCCH (PDCCH addressed to CS-RNTI)
  • the uplink grant may be signaled and activated or may be deactivated.
  • the PDCCH addressed as CS-RNTI indicates that the corresponding uplink grant can be implicitly reused according to a period set by RRC signaling until deactivation.
  • the BS can dynamically allocate downlink resources to the UE through PDCCH(s) addressed with C-RNTI.
  • the UE monitors the PDCCH(s) to find possible downlink assignments.
  • the BS may allocate downlink resources to the UE using semi-static scheduling (SPS).
  • SPS semi-static scheduling
  • the BS may set a period of downlink assignments set through RRC signaling, and may signal and activate the set downlink assignment through the PDCCH addressed to CS-RNTI, or deactivate it.
  • the PDCCH addressed to CS-RNTI indicates that the corresponding downlink assignment can be implicitly reused according to a period set by RRC signaling until deactivation.
  • the PDCCH can be used to schedule DL transmission on the PDSCH or UL transmission on the PUSCH.
  • DCI on the PDCCH for scheduling DL transmission may include DL resource allocation including at least a modulation and coding format (e.g., modulation and coding scheme (MCS) index IMCS), resource allocation, and HARQ information related to the DL-SCH. have.
  • the DCI on the PDCCH for scheduling UL transmission may include an uplink scheduling grant that includes at least a modulation and coding format, resource allocation, and HARQ information related to UL-SCH.
  • the size and use of DCI carried by one PDCCH differs according to the DCI format.
  • DCI format 0_0, DCI format 0_1, or DCI format 0_2 may be used for scheduling a PUSCH
  • DCI format 1_0, DCI format 1_1, or DCI format 1_2 may be used for scheduling a PDSCH.
  • DCI format 0_2 and DCI format 1_2 have higher transmission reliability and lower latency than the transmission reliability and latency requirements guaranteed by DCI format 0_0, DCI format 0_1, DCI format 1_0, and DCI format 1_1. It can be used to schedule transmissions with requirements.
  • Some implementations of this disclosure may be applied to UL data transmission based on DCL format 0_2.
  • Some implementations of this disclosure may be applied to DL data reception based on DCI format 1_2.
  • FIG. 10 illustrates an example of PDSCH time domain resource allocation by PDCCH and an example of PUSCH time domain resource allocation by PDCCH.
  • the DCI carried by the PDCCH to schedule the PDSCH or PUSCH includes a time domain resource assignment (TDRA) field, and the TDRA field is a row to an allocation table for PDSCH or PUSCH.
  • TDRA time domain resource assignment
  • a predefined default PDSCH time domain allocation is applied as the allocation table for the PDSCH, or the PDSCH time domain resource allocation table set by the BS through the RRC signaling pdsch-TimeDomainAllocationList is applied as the allocation table for the PDSCH.
  • a predefined default PUSCH time domain allocation is applied as the allocation table for the PDSCH, or the PUSCH time domain resource allocation table set by the BS through the RRC signaling pusch-TimeDomainAllocationList is applied as the allocation table for the PUSCH.
  • the PDSCH time domain resource allocation table to be applied and/or the PUSCH time domain resource allocation table to be applied may be determined according to a fixed/predefined rule (eg, see 3GPP TS 38.214).
  • each indexed row is assigned a DL allocation-to-PDSCH slot offset K0, a start and length indicator SLIV (or directly a start position of a PDSCH in the slot (eg, start symbol index S) and an allocation length (eg , The number of symbols L)), defines the PDSCH mapping type.
  • each indexed row is a UL grant-to-PUSCH slot offset K2, a start position of a PUSCH in the slot (eg, start symbol index S) and an allocation length (eg, number of symbols L), and PUSCH mapping type.
  • K0 for PDSCH or K2 for PUSCH indicates a difference between a slot with a PDCCH and a slot with a PDSCH or PUSCH corresponding to the PDCCH.
  • SLIV is a joint indication of a start symbol S relative to the start of a slot having a PDSCH or PUSCH and the number L of consecutive symbols counted from the symbol S.
  • mapping type A there are two types of mapping: one is mapping type A and the other is mapping type B.
  • DMRS demodulation reference signal
  • the DMRS is located in the first symbol allocated for PDSCH/PUSCH.
  • the scheduling DCI includes a frequency domain resource assignment (FDRA) field that provides assignment information on resource blocks used for PDSCH or PUSCH.
  • FDRA frequency domain resource assignment
  • the FDRA field provides the UE with information about a cell for PDSCH or PUSCCH transmission, information about a BWP for PDSCH or PUSCH transmission, and information about resource blocks for PDSCH or PUSCH transmission.
  • an established grant type 1 there are two types of transmission without a dynamic grant: an established grant type 1 and an established grant type 2.
  • a UL grant is provided by RRC signaling and is a configured grant. Is saved.
  • the UL grant is provided by the PDCCH and is stored or cleared as an uplink grant configured based on L1 signaling indicating activation or deactivation of the configured uplink grant.
  • Type 1 and Type 2 may be set by RRC signaling for each serving cell and for each BWP. Multiple settings can be active simultaneously on different serving cells.
  • the UE may receive the following parameters from the BS through RRC signaling:
  • timeDomainAllocation value m which provides a row index m+1 pointing to an allocation table, indicating a combination of a start symbol S, a length L, and a PUSCH mapping type
  • the UE When setting the configuration grant type 1 for the serving cell by RRC, the UE stores the UL grant provided by RRC as a configured uplink grant for the indicated serving cell, and in timeDomainOffset and S (derived from SLIV) Initialize or re-initialize so that the configured uplink grant starts in the corresponding symbol and recurs with periodicity.
  • timeDomainOffset and S derived from SLIV
  • the UE may receive the following parameters from the BS through RRC signaling:
  • the actual uplink grant is provided to the UE by the PDCCH (addressed with CS-RNTI).
  • SFNstart time, slotstart time, and symbolstart time represent SFN, slot, and symbol of the first transmission opportunity of the PUSCH after the set grant is (re-)initialized, respectively (respectively)
  • the UE may be configured with semi-persistent scheduling (SPS) for each serving cell and for each BWP by RRC signaling from the BS.
  • SPS semi-persistent scheduling
  • DL allocation is provided to the UE by PDCCH, and is stored or removed based on L1 signaling indicating SPS activation or deactivation.
  • the UE may receive the following parameters from the BS through RRC signaling:
  • the SFN, slot, and symbol of the th transmission are respectively represented, and numberOfSlotsPerFrame and numberOfSymbolsPerSlot represent the number of consecutive slots per frame and consecutive OFDM symbols per slot, respectively (see Tables 2 and 3).
  • the cyclic redundancy check (CRC) of the DCI format is scrambled with the CS-RNTI provided by the RRC parameter cs-RNTI, and the new data indicator field for the enabled transport block is set to 0. If there is, the UE confirms that the DL SPS allocated PDCCH or the configured UL grant type 2 PDCCH is valid for scheduling activation or scheduling cancellation. If all fields for the DCI format are set according to Table 6 or Table 7, validity confirmation of the DCI format is achieved. Table 6 illustrates special fields for validating DL SPS and UL grant type 2 scheduling activation PDCCH, and Table 7 exemplifies special fields for validating DL SPS and UL grant type 2 scheduling release PDCCH.
  • the actual DL allocation or UL grant for DL SPS or UL grant type 2, and the corresponding modulation and coding scheme are resource allocation fields in the DCI format carried by the corresponding DL SPS or UL grant type 2 scheduling activation PDCCH ( Yes, it is provided by a TDRA field providing a TDRA value m, an FDRA field providing a frequency resource block allocation, and a modulation and coding scheme field).
  • TDRA field providing a TDRA value m
  • an FDRA field providing a frequency resource block allocation
  • modulation and coding scheme field When validity check is achieved, the UE considers the information in the DCI format to be valid activation or valid release of DL SPS or configured UL grant type 2.
  • FIG. 11 illustrates a HARQ-ACK transmission/reception process.
  • the UE may detect a PDCCH in slot n. Thereafter, the UE may receive the PDSCH in slot n+K0 according to the scheduling information received through the PDCCH in slot n, and then transmit UCI through the PUCCH in slot n+K1.
  • the UCI includes a HARQ-ACK response for the PDSCH.
  • the HARQ-ACK response may consist of 1-bit.
  • the HARQ-ACK response is composed of 2-bits when spatial bundling is not set, and 1-bits when spatial bundling is set. I can.
  • the HARQ-ACK transmission time point for a plurality of PDSCHs is designated as slot n+K1
  • the UCI transmitted in slot n+K1 includes HARQ-ACK responses for the plurality of PDSCHs.
  • the reliability of PUSCH/PDSCH transmission may have to be higher than that of conventional PUSCH/PDSCH transmission.
  • repeated transmission of PUSCH/PDSCH may be considered.
  • the BS may set the UE to repeat transmission of PUSCH/PDSCH in K consecutive slots, and the UE may repeat transmission/reception of TB in each slot over K consecutive slots. .
  • the same symbol allocation may be applied across the K consecutive slots. In other words, the starting symbol index and the number of symbols for the PUSCH/PDSCH may be the same for each of the K consecutive slots.
  • PUSCH/PDSCH transmission is repeated at intervals smaller than slots to support transmission of multiple PUSCH/PDSCHs in one slot or slot boundary. ), it is good that the PUSCH/PDSCH can be transmitted.
  • frequency hopping to change frequency resources between transmissions of PUSCH/PDSCH is additionally considered in order to secure reliability through frequency diversity. Can be.
  • the repetition of PUSCH/PDSCH can be applied to transmission of PUSCH/PDSCH based on a set grant as well as PUSCH/PDSCH transmission based on dynamic UL grant/DL allocation through PDCCH.
  • resource allocation for one TB is always determined within one period of the configured grant. For example, a time duration for transmission of K repetitions for one TB does not exceed a time duration induced by a period P of a set grant.
  • the UE transmits/receives PUSCH/PDSCH only at a predetermined position according to a redundancy version (RV) sequence among a plurality of PUSCH/PDSCH resources within a period of a set grant.
  • RV redundancy version
  • the UE performs the initial transmission of the TB as the first of K transmission occasions (TOs) of K repetitions. Start at TO.
  • TOs transmission occasions
  • TOs K transmission occasions
  • TB transmission is started in the middle of a plurality of PUSCH/PDSCH resources within the set grant period, that is, in the middle TO among TOs, it may be difficult to perform repetition a sufficient number of times.
  • the operation using the set grant of a short period is allowed regardless of the transmission length of the PUSCH/PDSCH (e.g., the number of symbols occupied by the PUSCH/PDSCH). There may be a need.
  • an operation of repeatedly transmitting PUSCH/PDSCH at intervals shorter than that of a slot may be required.
  • URLLC In the case of URLLC, which is one of the representative scenarios of the next system, it has a user plane delay of 0.5ms and a low-latency, high-reliability requirement to transmit X bytes of data within 1ms within a 10 ⁇ -5 error rate.
  • eMBB generally has a large traffic capacity, but URLLC traffic has different characteristics that the file size is within tens to hundreds of bytes and is sporadic. Therefore, eMBB requires transmission that maximizes the transmission rate and minimizes the overhead of control information, and URLLC requires a short scheduling time unit and a reliable transmission method.
  • the reference time unit assumed/used to transmit/receive a physical channel may vary.
  • the reference time may be a basic unit for scheduling a specific physical channel, and the reference time unit may be changed according to the number of symbols constituting the corresponding scheduling time unit and/or subcarrier spacing.
  • Some examples/implementations of the present disclosure are described based on a slot or a mini-slot as a reference time unit for convenience of description.
  • the slot may be, for example, a basic scheduling unit used for general data traffic (eg, eMBB).
  • the mini-slot may have a shorter time period than the slot in the time domain, and is a basic scheduling used in a special or communication method (e.g., URLLC or unlicensed band or millimeter wave) for a special purpose. It can also be a unit.
  • a special or communication method e.g., URLLC or unlicensed band or millimeter wave
  • the example(s)/implementation(s) of the present disclosure transmit/receive a physical channel based on a mini-slot for eMBB service, or transmit/receive a physical channel based on a slot for URLLC or other communication techniques. It can also be applied if you do.
  • the UE when radio transmission and resource allocation to be used for the UE are dynamically instructed through DCI, the UE is a semi-static DL/UL in which the link direction of the resource allocation indicated by the BS is different. It is not expected that a collision with a link direction indicated by a semi-static DL/UL configuration or a slot format indicator (SFI) will occur. For example, in some scenarios, the UE does not expect a symbol indicated as UL by semi-static DL/UL configuration or SFI DCI to be indicated as a downlink resource by DCI.
  • SFI slot format indicator
  • the UE does not expect a symbol indicated as a DL by semi-static DL/UL configuration or SFI DCI to be indicated as an uplink resource by DCI. In these scenarios, it is possible for the UE to fully trust the dynamically received uplink or downlink transmission instruction and perform an operation according to the corresponding instruction.
  • a resource region dynamically allocated by DCI is repeatedly used in a plurality of slots (e.g., a resource region dynamically allocated by DCI is applied to each of a plurality of consecutive slots) .
  • the link direction of the initial transmission does not expect to collide with the link direction indicated by the semi-static DL/UL configuration or SFI, and the
  • repetitive transmission caused by DCI collides with a semi-static DL/UL configuration or a quasi-static DL/UL configuration or a link direction indicated by SFI the UE performs the indicated operation except for the corresponding transmission/reception. Perform.
  • the link direction indicated by semi-static DL/UL configuration may mean a link direction of DL or UL transmission configured by RRC signaling, system information, and/or UE-only RRC signaling.
  • link directions of symbols according to a TDD DL-UL pattern configured as UE-common or UE-only by RRC signaling may be link directions indicated by semi-static DL/UL configuration.
  • a pattern of symbols invalid for DL/UL transmission by RRC signaling may be configured as UE-common or UE-only, and the link direction of symbols not invalid as DL/UL according to the pattern is semi-static It may be a link direction indicated by DL/UL configuration.
  • the BS When the BS provides the UE with a resource set that is not available for PDSCH or PUSCH (eg, through rate-matching pattern information), a DL not indicated as an invalid DL or UL symbol by the corresponding resource set
  • the UL symbol may be a semi-statically configured DL/UL symbol.
  • the UE/BS divides the transmission duration of a total of 14 symbols into a transmission period of 10 symbols and a transmission period of 4 symbols in order to avoid slot boundaries, and the transmission duration of 10 symbols and 4 symbols
  • transmission is omitted in all of the 10 symbols and transmission is performed only in the latter four symbols.
  • transmission reliability is important (eg, URLLC transmission)
  • URLLC transmission such performance degradation can be a major problem. This problem occurs not only when resource allocation including slot boundaries (hereinafter, multi-segment resource allocation), but also resource allocation for single transmission within a slot or multiple small resource allocations within a slot repeatedly used. I can.
  • the present disclosure proposes a method of using for transmission using the remaining symbols excluding only some symbols without excluding the entire resource from transmission, even if some symbols of the symbols of the allocated resource are unusable.
  • implementations of the present disclosure are mainly described by taking multi-segment resource allocation as an example, but implementations of the present disclosure may be applied to other resource allocation methods.
  • radio resource allocation methods may be used in the present disclosure.
  • a UE receives resource allocations having different starting points (eg, starting symbols) from a base station
  • a method in which the UE can use the same DMRS symbol position in different resource allocations is proposed.
  • the following is an exemplary implementation for various examples of the present disclosure, and the present disclosure is not limited to this exemplary implementation.
  • the base station detects the DMRS and determines whether the UE has performed UL transmission, and accordingly, the DMRS of different UEs is protected. There is a great need to be.
  • radio resource allocation with a different starting point for the same time/frequency resource is used for URLLC transmission using the set grant, using the same DMRS symbol position can simplify the operation of the base station.
  • FIG 12 illustrates an uplink/downlink transmission process for various examples of the present disclosure.
  • a network (eg, at least one base station) transmits resource allocation information to a UE, and the UE may receive a message including resource allocation information from the network.
  • the resource allocation information may be transmitted through L1 signaling or higher layer signaling.
  • the resource allocation information may be a set grant.
  • the network may implicitly or explicitly transmit information on the DMRS symbol position, and the UE may implicitly or explicitly receive information on the DMRS symbol position from the network.
  • the information on the DMRS symbol position may be included in a message including the resource allocation information, or may be separately transmitted through L1 signaling or higher layer signaling.
  • the information on the location of the DMRS symbol may be information capable of determining the location of the DMRS symbol irrespective of resource allocation information transmitted to the UE.
  • the information for determining the DMRS symbol position may be information for determining the DMRS symbol position based on the slot structure.
  • determining the DMRS symbol position irrespective of the resource allocation information may mean that the DMRS symbol position is commonly applied to each resource allocation information when the UE receives a plurality of resource allocation information. That is, the information on the location of the DMRS symbol may be applied to one resource allocation information, or may not be applied to only one resource allocation information, but may be commonly applied to all resource allocation information received by the UE.
  • the UE may determine a time/frequency resource in which PUSCH/PDSCH and DMRS are transmitted based on the received information. In this case, PUSCH/PDSCH resources in which the DMRS is not transmitted may be excluded.
  • the UE may transmit a PUSCH or receive a PDSCH based on the determined resource. In this case, the UE may not transmit the PUSCH or may not receive the PDSCH on the PUSCH/PDSCH resource in which the DMRS is not transmitted.
  • the UE may receive DMRS symbol position information independently of a given resource allocation and determine a DMRS symbol position common to each resource allocation regardless of a given resource allocation.
  • the base station can easily align the DMRS symbol positions for allocation of a plurality of resources used by the UEs by transmitting separate DMRS symbol position information to the UE.
  • the base station may transmit separate DMRS symbol position information to the UE through L1 signaling or higher layer signaling at the same time as resource allocation or separately.
  • the DMRS symbol location information may be information for determining a DMRS symbol location based on a slot structure.
  • L1 signaling eg, UL grant or DL assignment, DCI
  • a specific RRC parameter may be transmitted together with the L1 signaling.
  • the RRC parameter dmrs-AdditionalPosition may be transmitted through UL grant or DL assignment.
  • the DMRS symbol location information transmitted to the UE may be transmitted by higher layer signaling, and in this case, it may be commonly applied to the PUSCH/PDSCH to be transmitted or received by the UE.
  • DMRS symbol location information when DMRS symbol location information is transmitted through L1 signaling, it may be included in resource allocation information and transmitted, and in this case, it may be applied to allocation resources determined based on resource allocation information transmitted together.
  • DMRS symbol location information is included in the configured grant and transmitted, it may be applied only to the allocated resource determined based on the configured grant.
  • the DMRS symbol location information is information on the location of a plurality of DMRS symbols
  • the location of each of the plurality of DMRS symbols may be explicitly informed through 4-bit information.
  • the DMRS symbol location information may explicitly indicate the DMRS symbol location based on a 14-bit symbol bitmap.
  • the UE may puncture or rate-match the corresponding DMRS symbol.
  • FIG. 13 is for explaining a DMRS symbol mapping method according to an example of the present disclosure.
  • the UE when a DMRS symbol position is set based on a slot and is set to symbols having symbol indexes #0, #3, #7, and #10, the UE includes a DMRS symbol position given from the base station.
  • PUSCH/PDSCH can be transmitted using a DMRS symbol given in a PUSCH/PDSCH resource.
  • FIG. 13 in the case of the 4th transmission of Resource #1, the 3rd transmission of Resource #2, and the 2nd transmission of Resource #3, two or more DMRS symbols are mapped, respectively, and the last symbol among symbols included in each nth transmission is Can be used as a DMRS symbol.
  • the DMRS mapped to the last symbol among the symbols included in the n-th transmission may degrade the block error rate (BLER) performance of the n-th transmission, but the corresponding DMRS is transferred to another transmission depending on the implementation of the UE or the base station. It can be used for channel estimation, or as described above, the same DMRS symbol position can be used in another UE or other configured resource using the same time/frequency resource, and accordingly, the corresponding DMRS transmission can be protected.
  • BLER block error rate
  • the position of the DMRS symbol may be indicated or set based on a sub-slot structure other than the above-described slot structure.
  • the sub-slot is included in one slot, and may be a unit including a plurality of symbols. That is, when one slot is divided into a plurality of subslots and defined, the DMRS symbol position may be determined based on the subslot.
  • the DMRS symbol position may be determined based on the start symbol of each sub-slot.
  • the subslots may have the same or similar size, and in this case, a specific DMRS symbol position may be commonly applied to all subslots.
  • a sub-slot has a size smaller than one slot, when a DMRS symbol position is determined based on a sub-slot, it is possible to reduce the overhead of a signal required for determining the DMRS symbol position.
  • the base station transmits information on the DMRS symbol and RE mapping method that other UEs can use to a specific UE through L1 signaling or higher layer signaling, and the UE transmits other UEs based on information received when performing PUSCH transmission or PDSCH reception.
  • the UE may additionally puncture or rate-match the RE that can be used for DMRS transmission.
  • information on the DMRS symbol and RE mapping method that can be used by other UEs includes the location of the DMRS symbol of another UE based on the start symbol of the slot, the first symbol of the PUSCH, or the first symbol of the PDSCH, and the DMRS configuration type ( configuration type), a DMRS mapping type, and/or a CDM group (or delta).
  • resource pattern information may be used, for example.
  • the resource that the other UE can use may be, for example, DMRS, and in this case, the resource pattern information may be DMRS pattern information.
  • the resource pattern information may be information on a pattern of at least one resource element to which a signal (eg, DMRS) of another UE is mapped or may be mapped among a plurality of resource elements given/allocated to a specific UE, and a resource pattern May mean a mapping pattern of at least one resource element to which a signal of another UE is mapped or can be mapped among a plurality of resource elements.
  • the resource pattern information is a DMRS symbol bitmap, a resource block bitmap, and/or a DMRS RE mapping method, etc. May include, and a DMRS pattern may be set based on the above-described information.
  • the DMRS symbol bitmap may be information for indicating a location of a symbol to which a DMRS of another UE is mapped among symbols included in one or a plurality of slots as a bitmap.
  • a DMRS symbol bitmap for indicating a location of a DMRS symbol included in one slot may have a 14-bit size.
  • the resource block bitmap may be information for indicating a location of a resource block to which a DMRS of another UE is mapped among a plurality of resource blocks as a bitmap. That is, the DMRS symbol bitmap may inform the DMRS mapping position of another UE in the time domain, and the resource block bitmap may inform the DMRS mapping position of another UE in the frequency domain. Accordingly, the UE may know the DMRS mapping position of another UE in units of resource elements based on the DMRS symbol bitmap and the resource block bitmap.
  • the UE may puncture or rate-match a resource element included in the resource pattern in PUSCH transmission or PDSCH reception.
  • the activation of the resource pattern may mean that the UE uses the resource pattern information when determining a PUSCH/PDSCH resource.
  • whether or not the resource pattern is activated may be indicated through information on the use of the resource pattern information.
  • the UE may puncture or rate-match a resource element included in the resource pattern based on whether or not it receives the information on the use of the resource pattern information.
  • the information on the use of the resource pattern information may be an indication to apply the resource pattern to puncture or rate-matching, and may be transmitted through DCI.
  • the base station can transmit DMRS symbol information for a plurality of UEs as one parameter set through the resource pattern information, signaling overhead between the UE and the base station can be reduced.
  • the UE may perform puncturing or rate-matching by additionally considering resource elements that other UEs can use for DMRS transmission in addition to resource allocation and DMRS symbols given to the corresponding UE. . Accordingly, when different UEs share time/frequency resources, independent DMRS transmission can be guaranteed, so that multiplexing performance of the UE or the base station can be improved.
  • the base station transmits information on a DMRS symbol that is periodically generated through L1 signaling or higher layer signaling to the UE, and the UE assumes a DMRS symbol position in PUSCH transmission or PDSCH reception based on the information on the DMRS symbol, or , A specific DMRS symbol may be punctured or rate-matched.
  • the information on the periodically generated DMRS symbol may include at least one of the following information by way of example.
  • the DMRS configuration type and the DMRS RE offset may be given for each symbol included in each slot.
  • the UE may determine a DMRS symbol based on information about the periodically occurring DMRS symbol received from the base station (eg, a DMRS symbol bitmap, a DMRS symbol offset, and/or a DMRS symbol period).
  • a DMRS symbol bitmap e.g., a DMRS symbol bitmap, a DMRS symbol offset, and/or a DMRS symbol period.
  • the DMRS symbol period is given as X slots
  • the DMRS symbol offset is given as Y slots
  • the length of the DMRS symbol bitmap is 14-bit
  • the UE determines the DMRS symbol based on information about the periodically occurring DMRS symbol received from the base station (e.g., a DMRS symbol bitmap, a DMRS symbol offset and/or a DMRS symbol period), the UE is determined In the DMRS symbol, a DMRS for PUSCH transmission or PDSCH reception may be transmitted and received.
  • information about the periodically occurring DMRS symbol received from the base station e.g., a DMRS symbol bitmap, a DMRS symbol offset and/or a DMRS symbol period
  • the UE performs PUSCH transmission or PDSCH reception in the determined DMRS symbol by assuming the PUSCH transmission or reception for the PUSCH transmission or PDSCH reception of another UE in the determined DMRS symbol
  • the DMRS RE offset received from the base station and the DMRS configuration In consideration of type information, the determined DMRS symbol (or RE) may be punctured or rate-matched.
  • the DMRS RE may be determined by Equation 1 below based on the DMRS symbol L and the DMRS RE offset d.
  • Equation 1 May be an RE located in the k-th subcarrier in the DMRS symbol L.
  • k is a frequency index based on the first subcarrier (e.g., subcarrier 0) of a given PUSCH/PDSCH resource allocation, the first subcarrier of the configured active BWP, or the first subcarrier of a common resource block (RB) as a reference point have.
  • the UE determines the location of the DMRS symbol based on the initially received resource allocation information, even if the resource allocation information may be interpreted differently by the UE. You can decide.
  • determining the location of the DMRS symbol based on the initially received resource allocation information is that even if the resource to be allocated by the base station and the allocated resource interpreted by the UE are different, the UE is based on the resource to be allocated by the base station. It may be to determine the location of.
  • the DMRS symbol position may be determined based on resource allocation information given from the base station.
  • FIG. 14 is a diagram illustrating resources allocated from a base station according to an example of the present disclosure.
  • a UE may be allocated a plurality of resources over a plurality of slots from a base station. Since a specific resource includes a slot boundary, an additional operation (eg, division, concatenation, excluding, etc.) for the specific resource may be required. As an example, it may be considered to contiguously use adjacent repetitive transmissions in order to reduce the complexity of transmission and reduce signaling overhead.
  • an additional operation eg, division, concatenation, excluding, etc.
  • a method of additionally dividing transmission (ie, resources) at a slot boundary may be considered. This may suffer from a relatively very large RS overhead depending on the size of the separated resource, and the size of the resource allocation may not be sufficient to transmit a given TB. However, there is an advantage that the DMRS symbol positions can be aligned between Resource #1, #2, and #3.
  • a method of connecting adjacent resources included in the same slot based on a slot boundary may be considered. This can improve BLER performance by reducing RS overhead, but since the determined DMRS symbols may vary for each resource, performance may be degraded when multiplexing between UEs or between resources is required, such as a set grant.
  • the mapping positions of DMRS symbols are between Resource #1, #2, and #3. It can be determined differently. As an example, two DMRS symbols are mapped in the resource unit (1) before the slot boundary of Resource #1, but one DMRS symbol is mapped in the resource units (1) before the slot boundary of Resource #2 and #3. Each is mapped, and the positions of the first DMRS symbols are all different.
  • a method of concatenating a resource divided on a slot boundary with an adjacent resource may be considered. This can solve the RS overhead problem or the problem that the resource allocation size is insufficient for TB transmission, but the DMRS symbols may not be aligned in some resources.
  • DMRS symbols are respectively mapped to the first symbol of each interpreted resource
  • a DMRS symbol mapped to the concatenated resource (2) of Resource #1 and the concatenated resource (1) of Resource #2, and Resource Locations of the DMRS symbols mapped to resource (1) #3 may be different.
  • 19 to 22 illustrate DMRS symbols determined according to various examples of the present disclosure.
  • the UE may determine a DMRS symbol based on initial resource allocation information received from the base station. That is, even if the resource to be allocated by the base station and the allocated resource interpreted by the UE are different, the UE determines the location of the DMRS symbol based on the resource to be allocated by the base station, so even if the allocated resource is interpreted differently by the UE, Resource #1 , #2 and #3 can be guaranteed the same DMRS symbol position. Accordingly, since the UE and the base station can be guaranteed the same DMRS symbol position between different resources and UEs, the problems mentioned in FIGS. 15 to 18 can be solved.
  • the UE may determine a location of a DMRS symbol based on a resource to be allocated by the base station.
  • the UE may determine the location of a DMRS symbol based on the resource to be allocated by the base station. In this case, when a DMRS symbol is not mapped to a specific allocated resource, the UE and the base station may not use the corresponding resource.
  • DMRS sharing when channel estimation is possible using DMRS transmission of resources adjacent to resources that do not contain a DMRS symbol according to the capabilities of the UE and the base station (hereinafter, DMRS sharing), the UE and the base station do not include a DMRS symbol. You may also consider using unused resource allocation.
  • the UE determines the position of the DMRS symbol based on the resource to be allocated by the base station. I can.
  • the UE may determine the location of a DMRS symbol based on the resource to be allocated by the base station.
  • the UE and when the DMRS symbol is not mapped to the determined or changed and interpreted allocation resource, and /Or the base station may not perform signal transmission or reception on the allocated resource.
  • the transmission scheduled for the allocated resource may be excluded (omit or dropped) or may be postpone to the next allocated resource and transmitted.
  • the delay of transmission may mean that the UE or the base station counts RV mapping and/or repetition order excluding allocated resources that do not include the DMRS symbol from the beginning.
  • the UE when the UE receives resource allocation information from a base station and determines a DMRS symbol position, as described above, according to the capabilities of the UE and the base station, the resource without the DMRS symbol and the adjacent resource are When channel estimation is possible using DMRS transmission, the UE and the base station may consider also using resource allocation that does not include a DMRS symbol.
  • the UE may transmit information on the DMRS sharing capability to the base station, and the base station may transmit resource allocation that does not include a DMRS symbol only to the UE that has transmitted the information on this capability.
  • the UE determines whether the DMRS symbol is included in the resource allocation adjacent to the resource allocation that does not contain the DMRS symbol. I can confirm.
  • the UE performs L1 signaling or higher layer signaling that receives information on resource allocation that does not contain the DMRS symbol. Can be ignored. That is, the UE may assume that resource allocation that does not contain a DMRS symbol and other resource allocation adjacent to each other always include the DMRS symbol. In other words, the UE may not assume that resource allocation that does not contain the DMRS symbol and that other resource allocation that is adjacent to each other do not include the DMRS symbol.
  • the UE when the UE receives resource allocation information from a base station and determines a DMRS symbol, it may be expected that the DMRS symbol is included in all resource allocations. Specifically, when the UE receives resource allocation information that does not include a DMRS symbol when receiving resource allocation information, L1 signaling or higher layer signaling that receives resource allocation information that does not include a DMRS symbol may be ignored. .
  • 23 is a flowchart of a method for transmitting an uplink signal by a user equipment according to an example of the present disclosure.
  • the user equipment may receive resource allocation information from the base station.
  • the resource allocation information may be a set grant.
  • the user equipment may receive resource pattern information from the base station.
  • the resource pattern information includes bitmap information for at least one symbol including the at least one resource element based on the resource pattern information and at least one resource element including the at least one resource element based on the resource pattern information It may include resource block bitmap information about the resource block.
  • the resource pattern information may be received through RRC signaling.
  • the user equipment may transmit the uplink signal to the base station in an uplink resource based on the resource allocation information.
  • the uplink resource may include a plurality of resource elements based on the resource allocation information based on not receiving information on the use of the resource pattern information.
  • the uplink resource includes at least one resource element based on the resource pattern information among the plurality of resource elements based on the resource allocation information based on receiving the information on the use of the resource pattern information.
  • Other resource elements can be included.
  • the information on the use of the resource pattern information may be received through a downlink signal.
  • the at least one resource element based on the resource pattern information may be punctured or rate-matched.
  • FIG. 24 is a flowchart of an uplink reception method of a base station according to an example of the present disclosure. Hereinafter, detailed descriptions of portions overlapping with those described in FIG. 23 will be omitted.
  • the base station may transmit resource allocation information to the user equipment.
  • the base station may transmit resource pattern information to the user equipment.
  • the base station may receive the uplink signal from the user equipment in the uplink resource based on the resource allocation information.
  • the uplink resource may include a plurality of resource elements based on the resource allocation information based on not transmitting information about the use of the resource pattern information.
  • the uplink resource includes at least one resource element based on the resource pattern information among the plurality of resource elements based on the resource allocation information based on transmitting the information on the use of the resource pattern information. Other resource elements can be included.
  • Implementations of the present disclosure may be used in a wireless communication system, a base station or user equipment, and other equipment.

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  • Computer Networks & Wireless Communication (AREA)
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Abstract

L'invention concerne, selon un aspect, un procédé de transmission d'un signal de liaison montante par un équipement utilisateur dans un système de communication sans fil, ledit procédé consistant : à recevoir des informations d'attribution de ressource; à recevoir des informations de motif de ressource; à émettre le signal de liaison montante dans une ressource de liaison montante sur la base des informations d'attribution de ressource, et, sur la base d'informations concernant l'utilisation des informations de motif de ressource qui ne sont pas reçues, la ressource de liaison montante comprenant une pluralité d'éléments de ressource sur la base des informations d'attribution de ressource, et, sur la base des informations concernant l'utilisation des informations de motif de ressource reçues, la ressource de liaison montante comprenant d'autres éléments de ressource à l'exception d'au moins un élément de ressource sur la base des informations de motif de ressource parmi la pluralité d'éléments de ressource sur la base des informations d'attribution de ressource.
PCT/KR2020/004309 2019-03-29 2020-03-30 Procédé pour effectuer une transmission de liaison montante, équipement utilisateur, dispositif, support d'informations et procédé et station de base pour effectuer une réception de liaison montante WO2020204520A1 (fr)

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