WO2023211140A1 - 하향링크 신호를 수신하는 방법, 사용자기기, 프로세싱 장치 및 저장 매체, 그리고 하향링크 신호를 전송하는 방법 및 기지국 - Google Patents
하향링크 신호를 수신하는 방법, 사용자기기, 프로세싱 장치 및 저장 매체, 그리고 하향링크 신호를 전송하는 방법 및 기지국 Download PDFInfo
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- WO2023211140A1 WO2023211140A1 PCT/KR2023/005658 KR2023005658W WO2023211140A1 WO 2023211140 A1 WO2023211140 A1 WO 2023211140A1 KR 2023005658 W KR2023005658 W KR 2023005658W WO 2023211140 A1 WO2023211140 A1 WO 2023211140A1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/0001—Arrangements for dividing the transmission path
- H04L5/0014—Three-dimensional division
- H04L5/0023—Time-frequency-space
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/20—Control channels or signalling for resource management
- H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
- H04W72/232—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal the control data signalling from the physical layer, e.g. DCI signalling
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0044—Allocation of payload; Allocation of data channels, e.g. PDSCH or PUSCH
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0053—Allocation of signalling, i.e. of overhead other than pilot signals
- H04L5/0055—Physical resource allocation for ACK/NACK
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/0091—Signalling for the administration of the divided path, e.g. signalling of configuration information
- H04L5/0092—Indication of how the channel is divided
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
- H04W52/02—Power saving arrangements
- H04W52/0203—Power saving arrangements in the radio access network or backbone network of wireless communication networks
- H04W52/0206—Power saving arrangements in the radio access network or backbone network of wireless communication networks in access points, e.g. base stations
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
- H04W52/02—Power saving arrangements
- H04W52/0209—Power saving arrangements in terminal devices
- H04W52/0225—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal
- H04W52/0229—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal where the received signal is a wanted signal
Definitions
- This specification relates to a wireless communication system.
- M2M machine-to-machine
- MTC machine type communication
- smart phones and tablet PCs personal computers
- eMBB enhanced mobile broadband
- RAT legacy radio access technology
- massive machine type communication which is designed to provide various services anytime, anywhere by connecting multiple devices and objects, is one of the major issues to be considered in next-generation communication.
- BS base station
- the data transmitted/received with the UEs to which the BS provides services. and the amount of control information is increasing. Since the amount of radio resources available to the BS for communication with the UE(s) is limited, the BS uses the finite radio resources to transmit uplink/downlink data and/or uplink/downlink control information from/to the UE(s).
- a new method for efficient reception/transmission is required. In other words, as the density of nodes and/or UEs increases, a method for efficiently using high density nodes or high density UEs for communication is required.
- a method for a user device to receive a downlink signal in a wireless communication system performs physical downlink control channel (PDCCH) monitoring; Based on the PDCCH monitoring, detecting a downlink control information (DCI) format for a cell in which a first bandwidth part (BWP) is active; and performing BWP switching to change the active BWP of the cell from the first BWP to the second BWP, based on the DCI format including a switching-related indication, wherein the DCI including the switching-related indication.
- the format is detected only in a common search space, not in a search space specific to the user device.
- a user device for receiving a downlink signal in a wireless communication system.
- the user device includes: at least one transceiver; at least one processor; and at least one computer memory operably connectable to the at least one processor and storing instructions that, when executed, cause the at least one processor to perform operations.
- the operations include: performing physical downlink control channel (PDCCH) monitoring; Based on the PDCCH monitoring, detecting a downlink control information (DCI) format for a cell in which a first bandwidth part (BWP) is active; and performing BWP switching to change the active BWP of the cell from the first BWP to the second BWP, based on the DCI format including a switching-related indication, wherein the DCI including the switching-related indication.
- the format is detected only in a common search space, not in a search space specific to the user device.
- a processing device in a wireless communication system.
- the processing device may include: at least one processor; and at least one computer memory operably connectable to the at least one processor and storing instructions that, when executed, cause the at least one processor to perform operations.
- the operations include: performing physical downlink control channel (PDCCH) monitoring; Based on the PDCCH monitoring, detecting a downlink control information (DCI) format for a cell in which a first bandwidth part (BWP) is active; and performing BWP switching to change the active BWP of the cell from the first BWP to the second BWP, based on the DCI format including a switching-related indication, wherein the DCI including the switching-related indication.
- Format is detected only in the common search space, not in the user device-specific search space.
- a computer-readable storage medium stores at least one computer program including instructions that, when executed by at least one processor, cause the at least one processor to perform operations for a user device.
- the operations include: performing physical downlink control channel (PDCCH) monitoring; Based on the PDCCH monitoring, detecting a downlink control information (DCI) format for a cell in which a first bandwidth part (BWP) is active; and performing BWP switching to change the active BWP of the cell from the first BWP to the second BWP, based on the DCI format including a switching-related indication, wherein the DCI including the switching-related indication.
- Format is detected only in the common search space, not in the user device-specific search space.
- a computer program stored on a computer-readable storage medium includes at least one program code that, when executed, includes instructions that cause at least one processor to perform operations, the operations comprising: performing physical downlink control channel (PDCCH) monitoring; ; Based on the PDCCH monitoring, detecting a downlink control information (DCI) format for a cell in which a first bandwidth part (BWP) is active; and performing BWP switching to change the active BWP of the cell from the first BWP to the second BWP, based on the DCI format including a switching-related indication, wherein the DCI including the switching-related indication. Format is detected only in the common search space, not in the user device-specific search space.
- PDCCH physical downlink control channel
- BWP bandwidth part
- a method for a base station to transmit a downlink signal from a user device in a wireless communication system is provided.
- the method is: a physical downlink control channel (PDCCH) carrying a downlink control information (DCI) format for a cell in which the first bandwidth part (BWP) is active; ) transfer; Based on the DCI format including a switching-related indication, performing BWP switching to change the active BWP of the cell from the first BWP to the second BWP, and the DCI format containing the switching-related indication. is transmitted only in the common search space, not in the search space specific to the user device.
- PDCCH physical downlink control channel
- DCI downlink control information
- BWP bandwidth part
- a base station that transmits a downlink signal from a user device in a wireless communication system.
- the base station may include: at least one transceiver; at least one processor; and at least one computer memory operably connectable to the at least one processor and storing instructions that, when executed, cause the at least one processor to perform operations.
- the operations are: a physical downlink control channel (PDCCH) carrying a downlink control information (DCI) format for a cell in which the first bandwidth part (BWP) is active; ) transfer; Based on the DCI format including a switching-related indication, performing BWP switching to change the active BWP of the cell from the first BWP to the second BWP, and the DCI format containing the switching-related indication. is transmitted only in the common search space, not in the search space specific to the user device.
- PDCCH physical downlink control channel
- DCI downlink control information
- BWP bandwidth part
- the method or the operations perform PDCCH monitoring; Based on the PDCCH monitoring, detect the DCI format for the cell in which the first BWP is active; And based on the DCI format including a switching-related indication, it may include performing BWP switching to change the active BWP of the cell from the first BWP to the second BWP.
- the DCI format including the switching-related indication can be detected or transmitted only in a common search space, not a search space specific to the user device.
- the DCI format may include information regarding the timing for the BWP switching.
- the operations may include: receiving RRC settings for the DCI format.
- the RRC settings may include settings related to BWP for NES.
- the second BWP may be the BWP for the NES.
- the method by the user device or the operations of the user device, the processing device or the storage medium may include: receiving HARQ-ACK feedback related settings for the DCI format. You can.
- the HARQ-ACK feedback-related settings may include settings regarding PUCCH resources related to the DCI format.
- the method or the operations by the base station may include: transmitting a HARQ-ACK feedback related setting for the DCI format.
- the HARQ-ACK feedback-related settings may include settings regarding PUCCH resources related to the DCI format.
- the PUCCH resource may be dedicated to the user device.
- the DCI format may include information related to timing at which HARQ-ACK information for the DCI format will be transmitted.
- wireless communication signals can be transmitted/received efficiently. Accordingly, the overall throughput of the wireless communication system can be increased.
- the number of control channels to be transmitted by the BS to a plurality of UEs and the amount of communication resources used can be reduced. Accordingly, network energy can be saved.
- FIG. 1 shows an example of communication system 1 to which implementations of the present specification are applied;
- FIG. 2 is a block diagram showing examples of communication devices capable of performing a method according to the present specification
- FIG. 3 illustrates another example of a wireless device capable of implementing implementation(s) of the present specification
- Figure 4 shows an example of a frame structure available in a 3rd generation partnership project (3GPP) based wireless communication system
- Figure 5 illustrates a resource grid of slots
- Figure 6 shows an example of PDSCH time domain resource allocation by PDCCH and an example of PUSCH time domain resource allocation by PDCCH;
- FIG. 7 illustrates bandwidth part types
- FIG. 8 illustrates Discontinuous Reception (DRX) operation
- Figure 10 illustrates the flow of DL signal transmission in the BS according to some implementations of the present specification.
- multiple access systems include code division multiple access (CDMA) systems, frequency division multiple access (FDMA) systems, time division multiple access (TDMA) systems, orthogonal frequency division multiple access (OFDMA) systems, and single carrier frequency (SC-FDMA) systems.
- CDMA may be implemented in a wireless technology such as Universal Terrestrial Radio Access (UTRA) or CDMA2000.
- TDMA may be implemented in wireless technologies such as Global System for Mobile communication (GSM), General Packet Radio Service (GPRS), Enhanced Data Rates for GSM Evolution (EDGE) (i.e., GERAN), etc.
- GSM Global System for Mobile communication
- GPRS General Packet Radio Service
- EDGE Enhanced Data Rates for GSM Evolution
- 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, evolved-UTRA (E-UTRA), etc.
- IEEE Institute of Electrical and Electronics Engineers
- WiFi WiFi
- WiMAX WiMAX
- IEEE802-20 evolved-UTRA
- UTRA is part of the Universal Mobile Telecommunication System (UMTS)
- 3GPP 3rd Generation Partnership Project
- LTE Long Term Evolution
- 3GPP LTE adopts OFDMA in the downlink (DL) and SC-FDMA in the uplink (UL).
- LTE-A LTE-advanced
- LTE-A LTE-advanced
- 3GPP-based standard documents such as 3GPP TS 36.211, 3GPP TS 36.212, 3GPP TS 36.213, 3GPP TS 36.321, 3GPP TS 36.300, and 3GPP Reference may be made to TS 36.331, 3GPP TS 37.213, 3GPP TS 38.211, 3GPP TS 38.212, 3GPP TS 38.213, 3GPP TS 38.214, 3GPP TS 38.300, 3GPP TS 38.331, etc.
- the expression that the device “assumes” may mean that the entity transmitting the channel transmits the channel to comply with the “assumption.” This may mean that the subject receiving the channel receives or decodes the channel in a form that conforms to the “assumption,” under the premise that the channel was transmitted in compliance with the “assumption.”
- the UE may be fixed or mobile, and includes various devices that transmit and/or receive user data and/or various control information by communicating with a base station (BS).
- BS includes (Terminal Equipment), MS (Mobile Station), MT (Mobile Terminal), UT (User Terminal), SS (Subscribe Station), wireless device, PDA (Personal Digital Assistant), and wireless modem. ), can be called a handheld device, etc.
- BS generally refers to a fixed station that communicates with the UE and/or other BSs, and exchanges various data and control information by communicating with the UE and other BSs.
- BS may be called by different terms, such as Advanced Base Station (ABS), Node-B (NB), evolved-NodeB (eNB), Base Transceiver System (BTS), Access Point, and Processing Server (PS).
- ABS Advanced Base Station
- NB Node-B
- eNB evolved-NodeB
- BTS Base Transceiver System
- gNB BS of a new radio access technology network
- BS is collectively referred to as BS regardless of the type or version of communication technology.
- a node refers to a fixed point that can transmit/receive wireless signals by communicating with the UE.
- Various types of BSs can be used as nodes regardless of their names.
- a BS, NB, eNB, pico-cell eNB (PeNB), home eNB (HeNB), relay, repeater, etc. may be nodes.
- the node may not 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 that of the BS.
- RRH or RRU (hereinafter referred to as RRH/RRU) is generally connected to the BS through a dedicated line such as an optical cable, so compared to cooperative communication by BSs generally connected through wireless lines, RRH/RRU and BS Collaborative communication can be performed smoothly.
- At least one antenna is installed in one node.
- the antenna may refer to a physical antenna, an antenna port, a virtual antenna, or an antenna group. Nodes are also called points.
- a cell refers to a certain geographical area where one or more nodes provide communication services. Therefore, in this specification, communicating with a specific cell may mean communicating with a BS or node that provides communication services to the specific cell.
- the downlink/uplink signal of a specific cell refers to a downlink/uplink signal from/to a BS or node that provides communication services to the specific cell.
- a cell that provides uplink/downlink communication services to the UE is specifically called a serving cell.
- the channel status/quality of a specific cell refers to the channel status/quality of a channel or communication link formed between a BS or node providing a communication service to the specific cell and the UE.
- the UE determines the downlink channel status from a specific node through the antenna port(s) of the specific node and the CRS (Cell-specific Reference Signal) transmitted on the CRS (Cell-specific Reference Signal) resource allocated to the specific node. /Or it can be measured using CSI-RS (Channel State Information Reference Signal) resources transmitted on CSI-RS (Channel State Information Reference Signal) resources.
- CRS Cell-specific Reference Signal
- CSI-RS Channel State Information Reference Signal
- 3GPP-based communication systems use the concept of cells to manage radio resources, and cells associated with radio resources are distinguished from cells in a geographic area.
- a “cell” in a geographic area can be understood as the coverage through which a node can provide services using a carrier
- a “cell” in a wireless resource can be understood as the bandwidth (bandwidth), which is the frequency range configured by the carrier. It is related to bandwidth, BW).
- Downlink coverage which is the range where a node can transmit a valid signal
- uplink coverage which is the range where a valid signal can be received from the UE, depend on the carrier that carries the signal, so the node's coverage is used by the node. It is also associated with the coverage of a “cell” of wireless resources. Accordingly, 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 with effective strength.
- a “cell” associated with a radio resource 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. .
- a cell may be configured with DL resources alone or a combination of DL resources and UL resources.
- the linkage between the carrier frequency of DL resources (or, DL CC) and the carrier frequency of UL resources (or, UL CC) is indicated by system information. It can be.
- SIB2 System Information Block Type2
- 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 during RRC connection establishment/re-establishment/handover, and one serving cell Provides security input during RRC connection re-establishment/handover.
- NAS non-access stratum
- NAS non-access stratum
- Scells secondary cells
- Scells may be configured to form a set of serving cells together with the Pcell.
- An Scell is a cell that can be set up after RRC (Radio Resource Control) connection establishment and provides additional radio resources in addition to the resources of a special cell (SpCell).
- the carrier corresponding to the Pcell in the downlink is called the downlink primary CC (DL PCC)
- the carrier corresponding to the Pcell in the uplink is called the UL primary CC (UL PCC).
- the carrier corresponding to the Scell in the downlink is called a DL secondary CC (DL SCC)
- UL SCC UL secondary CC
- the term special cell refers to the Pcell of a master cell group (MCG) or the primary of a secondary cell group (SCG). It is called a primary secondary cell (PSCell).
- SpCell supports PUCCH transmission and contention-based random access, and is always activated.
- the MCG is a group of serving cells associated with a master node (e.g., BS) and consists of an SpCell (Pcell) and optionally one or more Scells.
- the SCG is a subset of serving cells associated with a secondary node and consists of a primary secondary cell (PSCell) and zero or more Scells.
- PSCell is the primary Scell of SCG.
- serving cells For a UE in RRC_CONNECTED state that is not configured as CA or DC, there is only one serving cell consisting of only Pcells.
- serving cells For a UE in RRC_CONNECTED state set to CA or DC, the term serving cells refers to the set of cells consisting of SpCell(s) and all Scell(s).
- two MAC entities are configured in the UE: one medium access control (MAC) entity for MCG and one MAC entity for SCG.
- MAC medium access control
- a Pcell PUCCH group consisting of a Pcell and zero or more Scells also known as a primary PUCCH group
- a Scell PUCCH group consisting of only Scell(s) also known as a secondary PUCCH group
- PUCCH Scell the Scell (hereinafter referred to as PUCCH Scell) through which the PUCCH associated with the cell is transmitted may be set.
- the Scell for which the PUCCH Scell is indicated belongs to the Scell PUCCH group (i.e., secondary PUCCH group), and PUCCH transmission of the related UCI is performed on the PUCCH Scell.
- the PUCCH Scell is not indicated, or the cell indicated as the cell for PUCCH transmission is a Pcell.
- the Scell belongs to the Pcell PUCCH group (i.e., primary PUCCH group), and PUCCH transmission of the relevant UCI is performed on the Pcell.
- the primary cell may refer to the PSCell of the SCG.
- the primary cell may refer to the PUCCH Scell of the secondary PUCCH group.
- the UE receives information from the BS through downlink (DL), and the UE transmits information to the BS through uplink (UL).
- Information transmitted and/or received by the BS and UE includes data and various control information, and various physical channels exist depending on the type/purpose of the information they transmit and/or receive.
- the 3GPP-based communication standard includes downlink physical channels corresponding to resource elements carrying information originating from the upper layer, and downlink physical channels corresponding to resource elements used by the physical layer but not carrying information originating from the upper layer.
- link physical signals For example, a physical downlink shared channel (PDSCH), a physical broadcast channel (PBCH), a physical downlink control channel (PDCCH), etc. are downlink physical channels. It is defined, and the reference signal and synchronization signal are defined as downlink physical signals.
- DMRS demodulation reference signal
- CSI-RS channel state information RS
- the 3GPP-based communication standard includes uplink physical channels corresponding to resource elements carrying information originating from upper layers, and uplink physical channels corresponding to resource elements used by the physical layer but not carrying information originating from upper layers.
- Link physical signals are defined. For example, a physical uplink shared channel (PUSCH), a physical uplink control channel (PUCCH), and a physical random access channel (PRACH) are used as uplink physical channels.
- PUSCH physical uplink shared channel
- PUCCH physical uplink control channel
- PRACH physical random access channel
- a demodulation reference signal (DMRS) for uplink control/data signals, a sounding reference signal (SRS) used for uplink channel measurement, etc. are defined.
- PDCCH Physical Downlink Control CHannel
- PDSCH Physical Downlink Shared CHannel
- PUCCH Physical Uplink Control CHannel
- PUSCH Physical Uplink Shared CHannel
- PRACH Physical Random Access CHannel
- the expression that the user device transmits/receives PUCCH/PUSCH/PRACH is used with the same meaning as transmitting/receiving uplink control information/uplink data/random access signal on or through PUCCH/PUSCH/PRACH, respectively.
- the expression that the BS transmits/receives PBCH/PDCCH/PDSCH is used in the same meaning as transmitting broadcast information/downlink control information/downlink data on or through PBCH/PDCCH/PDSCH, respectively.
- radio resources e.g., time-frequency resources
- PUCCH/PUSCH/PDSCH resources are also referred to as PUCCH/PUSCH/PDSCH resources.
- the communication device receives synchronization signal block (SSB), DMRS, CSI-RS, PBCH, PDCCH, PDSCH, PUSCH, and/or PUCCH in the form of wireless signals on the cell, so that a specific physical channel or specific physical signal It is not possible to select only wireless signals that include only and receive them through an RF receiver, or select and receive only wireless signals that exclude specific physical channels or physical signals and receive them through an RF receiver.
- the communication device receives wireless signals on a cell through an RF receiver, converts the wireless signals, which are RF band signals, into baseband signals, and uses one or more processors to convert the wireless signals to baseband signals. Decode physical signals and/or physical channels within the signals.
- not receiving a physical signal and/or physical channel does not actually mean that the communication device does not receive wireless signals including the physical signal and/or physical channel, but rather the wireless signal. This may mean not attempting to restore the physical signal and/or the physical channel, for example, not attempting to decode the physical signal and/or the physical channel.
- next-generation communications As more communication devices require greater communication capacity, the need for improved mobile broadband communication compared to existing radio access technology (RAT) is emerging. Additionally, massive MTC, which provides various services anytime, anywhere by connecting multiple devices and objects, is also one of the major issues to be considered in next-generation communications. In addition, communication system design considering services/UEs sensitive to reliability and latency is being discussed. As such, the introduction of next-generation RAT considering advanced mobile broadband communications, massive MTC, and URLLC (Ultra-Reliable and Low Latency Communication) is being discussed. Currently, 3GPP is conducting studies on next-generation mobile communication systems after EPC. In this specification, for convenience, the technology is referred to as new RAT (new RAT, NR) or 5G RAT, and a system that uses or supports NR is referred to as an NR system.
- new RAT new RAT
- 5G RAT 5G RAT
- FIG. 1 shows an example of communication system 1 to which implementations of the present specification are applied.
- the communication system 1 to which this specification applies includes a wireless device, a BS, and a network.
- a wireless device refers to a device that performs communication using wireless access technology (e.g., 5G NR (New RAT), LTE (e.g., E-UTRA)) and may be referred to as a communication/wireless/5G device.
- wireless devices include robots (100a), vehicles (100b-1, 100b-2), XR (eXtended Reality) devices (100c), hand-held devices (100d), and home appliances (100e).
- vehicles may include vehicles equipped with wireless communication functions, autonomous vehicles, vehicles capable of inter-vehicle communication, etc.
- 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, HMD (Head-Mounted Device), HUD (Head-Up Display) installed in vehicles, televisions, smartphones, It can be implemented in the form of computers, wearable devices, home appliances, digital signage, vehicles, robots, etc.
- Portable devices may include smartphones, smart pads, wearable devices (e.g., smartwatches, smart glasses), and computers (e.g., laptops, etc.).
- Home appliances may include TVs, refrigerators, washing machines, etc.
- IoT devices may include sensors, smart meters, etc.
- a BS,network may also be implemented with wireless devices, and a,specific wireless device may operate as a BS/network node to,other wireless devices.
- 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, 4G (eg, LTE) network, or 5G (eg, NR) network.
- Wireless devices 100a to 100f may communicate with each other through the BS 200/network 300, but may also communicate directly (e.g. sidelink communication) without going through the BS/network.
- vehicles 100b-1 and 100b-2 may communicate directly (e.g.
- V2V Vehicle to Vehicle
- V2X Vehicle to everything
- an IoT device eg, sensor
- another IoT device eg, sensor
- another wireless device 100a to 100f
- Wireless communication/connection (150a, 150b) may be performed between wireless devices (100a ⁇ 100f)/BS(200)-BS(200)/wireless devices (100a ⁇ 100f).
- wireless communication/connection, uplink/downlink communication 150a and sidelink communication 150b (or D2D communication) may be achieved through various wireless access technologies (e.g., 5G NR).
- 5G NR wireless access technologies
- the wireless device and the BS/wireless device can transmit/receive wireless signals to each other.
- various configuration information setting processes for transmitting/receiving wireless signals various signal processing processes (e.g., channel encoding/decoding, modulation/demodulation, resource Mapping/demapping, etc.), resource allocation process, etc. may be performed.
- various signal processing processes e.g., channel encoding/decoding, modulation/demodulation, resource Mapping/demapping, etc.
- resource allocation process etc.
- Figure 2 is a block diagram showing examples of communication devices capable of performing a method according to the present specification.
- 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).
- ⁇ first wireless device 100, second wireless device 200 ⁇ refers to ⁇ wireless device 100x, BS 200 ⁇ and/or ⁇ wireless device 100x, wireless device 100x) in FIG. ⁇ can be responded to.
- the first wireless device 100 includes one or more processors 102 and one or more memories 104, and may additionally include one or more transceivers 106 and/or one or more antennas 108.
- Processor 102 controls memory 104 and/or transceiver 106 and may be configured to implement functions, procedures and/or methods described/suggested below.
- the processor 102 may process information in the memory 104 to generate first information/signal and then transmit a wireless signal including the first information/signal through the transceiver 106.
- the processor 102 may receive a wireless signal including the second information/signal through the transceiver 106 and then store information obtained from signal processing of the second information/signal in the memory 104.
- the memory 104 may be connected to the processor 102 and may store various information related to the operation of the processor 102. For example, memory 104 may perform some or all of the processes controlled by processor 102 or store software code containing instructions for performing the procedures and/or methods described/suggested below. there is.
- the processor 102 and memory 104 may be part of a communication modem/circuit/chip designed to implement wireless communication technology (eg, LTE, NR).
- Transceiver 106 may be coupled to processor 102 and may transmit and/or receive wireless signals via one or more antennas 108. Transceiver 106 may include a transmitter and/or receiver. The transceiver 106 can be used interchangeably 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, one or more memories 204, and may further include one or more transceivers 206 and/or one or more antennas 208.
- Processor 202 controls memory 204 and/or transceiver 206 and may be configured to implement the functions, procedures and/or methods described/suggested below.
- the processor 202 may process the 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 receive a wireless signal including the fourth information/signal through the transceiver 206 and then store information obtained from signal processing of the fourth information/signal in the memory 204.
- the memory 204 may be connected to the processor 202 and may store various information related to the operation of the processor 202. For example, memory 204 may perform some or all of the processes controlled by processor 202 or store software code containing instructions for performing the procedures and/or methods described/suggested below. there is.
- the processor 202 and memory 204 may be part of a communication modem/circuit/chip designed to implement wireless communication technology (eg, LTE, NR).
- Transceiver 206 may be coupled to processor 202 and may transmit and/or receive wireless signals via one or more antennas 208. Transceiver 206 may include a transmitter and/or receiver. The transceiver 206 can be used interchangeably with the RF unit.
- a wireless device may mean a communication modem/circuit/chip.
- Wireless communication technologies implemented in the wireless devices 100 and 200 of this specification may include Narrowband Internet of Things for low-power communication as well as LTE, NR, and 6G.
- NB-IoT technology may be an example of LPWAN (Low Power Wide Area Network) technology and may be implemented in standards such as LTE Cat NB1 and/or LTE Cat NB2, and is limited to the above-mentioned names. no.
- the wireless communication technology implemented in the wireless device (XXX, YYY) of this specification may perform communication based on LTE-M technology.
- LTE-M technology may be an example of LPWAN technology, and may be called various names such as enhanced Machine Type Communication (eMTC).
- eMTC enhanced Machine Type Communication
- LTE-M technologies include 1) LTE CAT 0, 2) LTE Cat M1, 3) LTE Cat M2, 4) LTE non-BL (non-Bandwidth Limited), 5) LTE-MTC, 6) LTE Machine. It can be implemented in at least one of various standards such as Type Communication, and/or 7) LTE M, and is not limited to the above-mentioned names.
- the wireless communication technology implemented in the wireless device (XXX, YYY) of this specification is at least one of ZigBee, Bluetooth, and Low Power Wide Area Network (LPWAN) considering low-power communication. It may include any one, and is not limited to the above-mentioned names.
- ZigBee technology can create personal area networks (PAN) related to small/low-power digital communications based on various standards such as IEEE 802.15.4, and can be called by various names.
- one or more protocol layers may be implemented by one or more processors 102, 202.
- one or more processors 102, 202 may operate on one or more layers (e.g., a physical (PHY) layer, a medium access control (MAC) layer, and a radio link control (RLC) layer.
- layers e.g., a physical (PHY) layer, a medium access control (MAC) layer, and a radio link control (RLC) layer.
- functional layers such as packet data convergence protocol (PDCP) layer, radio resource control (RRC) layer, and service data adaptation protocol (SDAP) can be implemented.
- PDCP packet data convergence protocol
- RRC radio resource control
- SDAP service data adaptation protocol
- One or more processors 102, 202 may process one or more protocol data units (PDUs) and/or one or more service data units (SDUs) according to the functions, procedures, proposals and/or methods disclosed herein. ) can be created.
- One or more processors 102, 202 may generate messages, control information, data or information according to the functions, procedures, suggestions and/or methods disclosed herein.
- One or more processors 102, 202 may process signals (e.g., baseband signals) containing PDUs, SDUs, messages, control information, data or information in accordance with the functions, procedures, proposals and/or methods disclosed herein. Can be generated and provided to one or more transceivers (106, 206).
- One or more processors 102, 202 may receive signals (e.g., baseband signals) from one or more transceivers 106, 206 and transmit a PDU, SDU, or PDU according to the functions, procedures, suggestions, and/or methods disclosed herein. , messages, control information, data or information can be obtained.
- signals e.g., baseband signals
- transceivers 106, 206 may transmit signals (e.g., baseband signals) from one or more transceivers 106, 206 and transmit a PDU, SDU, or PDU according to the functions, procedures, suggestions, and/or methods disclosed herein. , messages, control information, data or information can be obtained.
- One or more processors 102, 202 may be referred to as a controller, microcontroller, microprocessor, or microcomputer.
- One or more processors 102, 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, suggestions and/or methods disclosed herein may be included in one or more processors (102, 202) or stored in one or more memories (104, 204) to enable one or more processors (102, 202). 202).
- the functions, procedures, suggestions and or methods disclosed in this document may be implemented using firmware or software in the form of codes, instructions and/or sets of instructions.
- One or more memories 104, 204 may be connected to one or more processors 102, 202 and may store various types of data, signals, messages, information, programs, codes, instructions, and/or instructions.
- One or more memories 104, 204 may consist of ROM, RAM, EPROM, flash memory, hard drives, registers, cache memory, computer readable storage media, and/or combinations thereof.
- One or more memories 104, 204 may be located internal to and/or external to one or more processors 102, 202. Additionally, one or more memories 104, 204 may be connected to one or more processors 102, 202 through various technologies, such as wired or wireless connections.
- One or more transceivers 106, 206 may transmit user data, control information, wireless signals/channels, etc. mentioned in the methods and/or operation flowcharts of this document to one or more other devices.
- One or more transceivers 106, 206 may receive user data, control information, wireless signals/channels, etc. mentioned in the functions, procedures, proposals, methods and/or operational flowcharts disclosed herein, etc. 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 wireless signals to one or more other devices. Additionally, one or more processors 102, 202 may control one or more transceivers 106, 206 to receive user data, control information, or wireless signals from one or more other devices. In addition, one or more transceivers (106, 206) may be connected to one or more antennas (108, 208), and one or more transceivers (106, 206) may perform the functions and procedures disclosed in this document through one or more antennas (108, 208). , may be set to transmit and/or receive user data, control information, wireless signals/channels, etc.
- one or more antennas may be multiple physical antennas or multiple logical antennas (eg, antenna ports).
- One or more transceivers (106, 206) process the received user data, control information, wireless signals/channels, etc. using one or more processors (102, 202), and process the received wireless signals/channels, etc. in the RF band signal. It can be converted to a baseband signal.
- One or more transceivers (106, 206) may convert user data, control information, wireless signals/channels, etc. processed using one or more processors (102, 202) from baseband signals to RF band signals.
- one or more transceivers 106, 206 may comprise (analog) oscillators and/or filters.
- wireless devices 100 and 200 correspond to the wireless devices 100 and 200 of FIG. 2 and include 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 communication circuitry 112 and transceiver(s) 114.
- communication circuitry 112 may include one or more processors 102, 202 and/or one or more memories 104, 204 of FIG. 2.
- transceiver(s) 114 may include one or more transceivers 106, 206 and/or one or more antennas 108, 208 of FIG.
- the control unit 120 is electrically connected to the communication unit 110, the memory unit 130, and the additional element 140 and controls overall operations of the wireless device.
- the control unit 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 the outside (e.g., another communication device) through the communication unit 110 through a wireless/wired interface, or to the outside (e.g., to another communication device) through the communication unit 110.
- 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 configured in various ways depending on the type of wireless device.
- the additional element 140 may include at least one of a power unit/battery, an input/output unit (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 devices (FIG. 1, 100c), portable devices (FIG. 1, 100d), and home appliances.
- FIG. 1 100e IoT device ( Figure 1, 100f), digital broadcasting UE, hologram device, public safety device, MTC device, medical device, fintech device (or financial device), security device, climate/environment device, It can be implemented in the form of an AI server/device ( Figure 1, 400), BS ( Figure 1, 200), network node, etc.
- Wireless devices can be mobile or used in fixed locations depending on the usage/service.
- various elements, components, units/parts, and/or modules within the wireless devices 100 and 200 may be entirely interconnected through a wired interface, or at least a portion 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 (e.g., 130 and 140) are connected through the communication unit 110.
- the control unit 120 and the first unit e.g., 130 and 140
- each element, component, unit/part, and/or module within the wireless devices 100 and 200 may further include one or more elements.
- the control unit 120 may be comprised of 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 graphics 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 can store instructions or programs, wherein the instructions or programs, when executed, are operably coupled to the at least one memory.
- a single processor can be enabled to perform operations according to several embodiments or implementations of the present specification.
- a computer-readable (non-volatile) storage medium can store at least one instruction or computer program, and the at least one instruction or computer program is executed by at least one processor. When executed, it may cause the at least one processor to perform operations according to several embodiments or implementations of the present specification.
- 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 that, when executed, cause at least one processor operably coupled to the at least one memory to perform some of the instructions herein. Operations according to embodiments or implementations may be performed.
- a computer program is stored in at least one computer-readable (non-volatile) storage medium and, when executed, performs operations in accordance with some implementations of this specification or causes at least one processor to perform some implementations of this specification. It may include program code that performs operations according to the instructions.
- the computer program may be provided in the form of a computer program product.
- the computer program product may include at least one computer-readable (non-volatile) storage medium.
- the communication device of the present specification includes at least one processor; and operably connectable to the at least one processor and storing instructions that, when executed, cause the at least one processor to perform operations according to example(s) of the present disclosure described below.
- Figure 4 shows an example of a frame structure available in a 3GPP-based wireless communication system.
- the structure of the frame in FIG. 4 is only an example, and the number of subframes, number of slots, and number of symbols in the frame can be changed in various ways.
- OFDM numerology e.g., subcarrier spacing (SCS)
- SCS subcarrier spacing
- TTI transmission time intervals
- the symbol is OFDM.
- Symbol (or, cyclic prefix - orthogonal frequency division multiplexing (CP-OFDM) symbol), SC-FDMA symbol (or, 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, DFT-s-OFDM symbol.
- the symbol, OFDM-based symbol, OFDM symbol, CP-OFDM symbol, and DFT-s-OFDM symbol can be replaced with each other.
- uplink and downlink transmissions are organized into frames.
- Each half-frame consists of 5 subframes, and the period T sf of a single subframe is 1 ms.
- Subframes are further divided into slots, and the number of slots within a 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 consists of 14 OFDM symbols, and in the case of an extended CP, each slot consists of 12 OFDM symbols.
- the slots are arranged in increasing order within a subframe as n u s ⁇ ⁇ 0, ..., n subframe,u slot - 1 ⁇ and in increasing order within a frame as n u s,f ⁇ ⁇ Numbered as 0, ..., n frame, u slot - 1 ⁇ .
- Figure 5 illustrates a resource grid of slots.
- a slot includes a plurality of symbols (eg, 14 or 12) in the time domain.
- a common resource block (CRB) N start, indicated by higher layer signaling (e.g., radio resource control (RRC) signaling)
- RRC radio resource control
- N size,u grid,x is the number of resource blocks (RB) in the resource grid
- the subscript x is DL for downlink and UL for uplink.
- N RB sc is the number of subcarriers per RB, and in a 3GPP-based wireless communication system, N RB sc is usually 12.
- the carrier bandwidth N size,u grid for the subcarrier spacing setting u is given to the UE by upper layer parameters (e.g., RRC parameters) from the network.
- RRC parameters resource resource element
- Each element in the resource grid for the antenna port p and the subcarrier spacing setting u is called 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 the symbol position relative to a reference point in the time domain.
- RB is defined by 12 consecutive subcarriers in the frequency domain.
- RBs can be classified into common resource blocks (CRBs) and physical resource blocks (PRBs).
- CRBs are numbered upwards from 0 in the frequency domain for the subcarrier spacing setting u .
- the center of subcarrier 0 of CRB 0 for the subcarrier spacing setting u coincides with 'point A', which is a common reference point for resource block grids.
- PRBs for subcarrier spacing setting u are defined within a bandwidth part (BWP) and are numbered from 0 to N size,u BWP,i -1, where i is the number of the bandwidth part.
- BWP bandwidth part
- BWP includes multiple consecutive RBs in the frequency domain.
- a BWP is a subset of contiguous CRBs defined for a given numerology u i within BWP i on a given carrier.
- a carrier wave may contain up to N (e.g., 5) BWPs.
- a UE may be configured to have one or more BWPs on a given component carrier. Data communication is performed through activated BWPs, and only a predetermined number (e.g., one) of BWPs configured for the UE can be activated on the corresponding carrier.
- the network For each serving cell in a set of DL BWPs or UL BWPs, the network must have at least one initial DL BWP and one (if the serving plan is set up with uplink) or two (if using supplementary uplink). Set the initial UL BWP.
- the network may configure additional UL and DL BWPs for the serving cell.
- BWP O carrier + RB start and the number of contiguous RBs N size
- BWP L RB , provided by the RRC parameter locationAndBandwidth indicated by the resource indicator value (RIV), and for the subcarrier spacing.
- O carrier provided by RRC parameter offsetToCarrier ; Index within the set of DL BWPs or UL BWPs; A set of BWP-common parameters and a set of BWP-specific parameters.
- VRBs are defined within a bandwidth part and numbered from 0 to N size,u BWP,i -1, where i is the number of the bandwidth part. VRBs are mapped to physical resource blocks (PRBs) according to interleaved mapping or non-interleaved mapping. In some implementations, for non-interleaved VRB-to-PRB mapping, VRB n may be mapped to PRB n.
- NR frequency bands are defined in two types of frequency ranges, FR1 and FR2, with FR2 also called millimeter wave (mmW).
- FR1 frequency ranges
- FR2 also called millimeter wave (mmW).
- mmW millimeter wave
- PDCCH carries DCI.
- DCI includes transmission format and resource allocation for 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 the UE/BS, such as paging information on the paging channel (PCH), system information on the DL-SCH, and random access response (RAR) transmitted on the PDSCH. It carries resource allocation information for control messages of the layer (hereinafter, upper layer), transmission power control commands, activation/deactivation of configured scheduling (CS), etc.
- DL-SCH downlink shared channel
- UL-SCH uplink shared channel
- RAR random access response
- a DCI containing resource allocation information for the DL-SCH is also called a PDSCH scheduling DCI
- a DCI containing resource allocation information for the UL-SCH is also called a PUSCH scheduling DCI.
- DCI includes a cyclic redundancy check (CRC), and the CRC is masked/scrambled with various identifiers (e.g., radio network temporary identifier (RNTI)) depending on the owner or usage of the PDCCH.
- RNTI radio network temporary identifier
- the PDCCH is for a specific UE
- the CRC is masked with the UE identifier (e.g., cell RNTI (C-RNTI)).
- the CRC is masked with the paging RNTI (P-RNTI). If the PDCCH relates to system information (e.g., system information block (SIB)), the CRC is masked with a system information RNTI (SI-RNTI). If the PDCCH relates to a random access response, the CRC is masked with It is masked with random access RNTI (RA-RATI).
- SIB system information block
- RA-RATI random access RNTI
- cross-carrier scheduling When the PDCCH on one serving cell schedules the PDSCH or PUSCH on another serving cell, it is called cross-carrier scheduling.
- Cross-carrier scheduling using a carrier indicator field (CIF) may allow the PDCCH of a serving cell to schedule resources on other serving cells. Meanwhile, scheduling the PDSCH or PUSCH on the serving cell to the serving cell is called self-carrier scheduling.
- the BS can provide the UE with information about the cell scheduling the cell. For example, the BS tells the UE whether the serving cell is scheduled by the PDCCH on another (scheduling) cell or by the serving cell, and if the serving cell is scheduled by another (scheduling) cell, which cell is it?
- a cell that carries the PDCCH is referred to as a scheduling cell, and a cell in which transmission of the PUSCH or PDSCH is scheduled by the DCI included in the PDCCH, that is, a cell that carries the PUSCH or PDSCH scheduled by the PDCCH. is called a scheduled cell.
- PDSCH is a physical layer UL channel for UL data transport.
- PDSCH carries downlink data (e.g., 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.
- QPSK Quadrature Phase Shift Keying
- QAM 16 Quadrature Amplitude Modulation
- a codeword is generated by encoding a transport block (TB).
- 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 radio resources along with DMRS, generated as an OFDM symbol signal, and transmitted through the corresponding antenna port.
- PUCCH refers to the physical layer UL channel for UCI transmission.
- PUCCH carries UCI (Uplink Control Information).
- UCI types transmitted on PUCCH include hybrid automatic repeat request (HARQ) - acknowledgment (ACK) information, scheduling request (SR), and channel state information (CSI). do.
- the UCI bits include hybrid automatic repeat request (HARQ)-acknowledgement (ACK) information bits, if present, SR information bits, if present, LRR information bits, and CSI bits, if present.
- HARQ-ACK information bits correspond to the HARQ-ACK codebook.
- a bit sequence in which HARQ-ACK information bits are arranged according to established rules is called a HARQ-ACK codebook.
- SR Scheduling request
- Hybrid automatic repeat request (HARQ)-acknowledgement (ACK) A response to a downlink data packet (e.g., codeword) on the PDSCH. Indicates whether the downlink data packet has been successfully received by the communication device. 1 bit of HARQ-ACK may be transmitted in response to a single codeword, and 2 bits of HARQ-ACK 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 used interchangeably with HARQ ACK/NACK, ACK/NACK, or A/N.
- CSI Channel state information
- CQI channel quality information
- RI rank indicator
- PMI precoding matrix indicator
- CSI-RS resource indicator CRI
- CRI CSI-RS resource indicator
- SS resource block indicator
- LI layer indicator
- CSI can be divided into CSI Part 1 and CSI Part 2 depending on 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 LI, PMI, and CQI for the second codeword may be included in CSI Part 2.
- the PUCCH resources configured 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.
- PUCCH formats can be classified as follows depending on UCI payload size and/or transmission length (e.g., number of symbols constituting PUCCH resources). The following table illustrates PUCCH formats. Depending on the PUCCH transmission length, it can be divided into short PUCCH (formats 0, 2) and long PUCCH (formats 1, 3, 4).
- PUCCH resources may be determined for each UCI type (e.g., A/N, SR, CSI). PUCCH resources used for UCI transmission can 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 UCI (payload) size (e.g., number of UCI bits). For example, the UE may select one of the following PUCCH resource sets according to the number of UCI bits (N UCI ).
- N UCI the number of UCI bits
- K is the number of PUCCH resource sets (K>1)
- N i is the maximum number of UCI bits supported by PUCCH resource set #i.
- PUCCH resource set #1 may be composed of resources of PUCCH formats 0 to 1
- other PUCCH resource sets may be composed of resources of PUCCH formats 2 to 4 (see Table 4).
- Settings for each PUCCH resource include a PUCCH resource index, an index of the start PRB, settings for one of PUCCH formats 0 to PUCCH 4, etc.
- the code rate for the UE to multiplex HARQ-ACK, SR and CSI report(s) within PUCCH transmission using PUCCH format 2, PUCCH format 3, or PUCCH format 4 is set to the UE by the BS via the upper layer parameter maxCodeRate .
- the upper layer parameter maxCodeRate is used to determine how to feed back UCI on PUCCH resources for PUCCH format 2, 3 or 4.
- 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).
- the UCI type is HARQ-ACK for Semi-Persistent Scheduling (SPS) PDSCH
- the PUCCH resource to be used for UCI transmission within the PUCCH resource set can be set to the UE by the network through higher layer signaling (e.g., RRC signaling). there is.
- the UCI type is HARQ-ACK for PDSCH scheduled by DCI
- the PUCCH resource to be used for UCI transmission within the PUCCH resource set can be scheduled based on DCI.
- the BS transmits DCI to the UE through PDCCH, and determines 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 (PRI).
- DCI is a DCI used for PDSCH scheduling
- UCI may include HARQ-ACK for PDSCH.
- the BS can set a PUCCH resource set consisting of more PUCCH resources than the number of states that can be expressed by ARI to the UE using a (UE-specific) higher layer (e.g., RRC) signal.
- the ARI indicates a PUCCH resource subset within the PUCCH resource set, and which PUCCH resource to use within the indicated PUCCH resource sub-set is determined by transmission resource information for the PDCCH (e.g., PDCCH start control channel element, It can be determined according to an implicit rule based on the CCE (CCE) index, etc.
- CCE CCE
- the UE must have uplink resources available to the UE in order to transmit UL-SCH data, and must have downlink resources available to the UE in order to receive DL-SCH data.
- 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 downlink allocation.
- the uplink grant is received dynamically by the UE on the PDCCH or within the RAR, or is set semi-persistently to the UE by RRC signaling from the BS.
- the downlink assignment is received dynamically by the UE on the PDCCH or set semi-persistently to the UE by RRC signaling from the BS.
- the BS can dynamically allocate uplink resources to the UE through PDCCH(s) addressed to a temporary identifier (cell radio network temporary identifier, C-RNTI).
- the UE monitors the PDCCH(s) to find possible uplink grant(s) for UL transmission. Additionally, the BS can allocate uplink resources using the grant set to the UE.
- Two types of established grants can be used: Type 1 and Type 2.
- Type 1 the BS directly provides a configured uplink grant (including period) through RRC signaling.
- the BS sets the period of the RRC-configured uplink grant through RRC signaling, and configures the configured scheduling RNTI (CS-RNTI) through PDCCH (PDCCH addressed to CS-RNTI).
- the uplink grant can be signaled and activated or deactivated.
- the PDCCH addressed to CS-RNTI indicates that the corresponding uplink grant can be implicitly reused according to the period set by RRC signaling until deactivated.
- 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 can allocate downlink resources to the UE using semi-static scheduling (SPS).
- SPS semi-static scheduling
- the BS sets the period of downlink assignments set through RRC signaling, and signals and activates or deactivates the set downlink assignments through PDCCH addressed to CS-RNTI.
- the PDCCH addressed to CS-RNTI indicates that the corresponding downlink assignment can be implicitly reused according to the period set by RRC signaling until deactivated.
- 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 enabled transport blocks is set to 0.
- CRC cyclic redundancy check
- the UE validates the DL SPS assigned PDCCH or the configured UL grant type 2 PDCCH as valid for scheduling activation or scheduling release.
- Validity confirmation of the DCI format is achieved if all fields for the DCI format are set according to Table 5 or Table 6.
- Table 5 illustrates special fields for DL SPS and UL grant type 2 scheduling activation PDCCH validity confirmation
- Table 6 illustrates special fields for DL SPS and UL grant type 2 scheduling release PDCCH validity confirmation.
- 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 (e.g., a TDRA field providing the TDRA value m, an FDRA field providing frequency resource block allocation, and a modulation and coding scheme field).
- a TDRA field providing the TDRA value m
- an FDRA field providing frequency resource block allocation
- modulation and coding scheme field e.g., a TDRA field providing the TDRA value m, an FDRA field providing frequency resource block allocation, and a modulation and coding scheme field.
- Figure 6 shows 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 for scheduling the PDSCH or PUSCH includes a time domain resource assignment (TDRA) field, where the TDRA field is a row in an allocation table for the PDSCH or PUSCH.
- TDRA time domain resource assignment
- a predefined default PDSCH time domain allocation is applied as the allocation table for PDSCH, or a PDSCH time domain resource allocation table set by the BS through RRC signaling pdsch-TimeDomainAllocationList is applied as the allocation table for PDSCH.
- a predefined default PUSCH time domain allocation is applied as the allocation table for PUSCH, or a PUSCH time domain resource allocation table set by the BS through RRC signaling pusch-TimeDomainAllocationList is applied as the allocation table for 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 fixed/predefined rules (e.g., see 3GPP TS 38.214).
- each indexed row has a DL assignment-to-PDSCH slot offset K 0 , a start and length indicator value SLIV (or directly the start position of the PDSCH within the slot (e.g., start symbol index S ), and an assignment length. (e.g. number of symbols L )), defines the PDSCH mapping type.
- each indexed row includes the UL grant-to-PUSCH slot offset K 2 , the start position of the PUSCH in the slot (e.g., start symbol index S ) and allocation length (e.g., number of symbols L ), and PUSCH mapping. Define the type.
- K 0 for PDSCH or K 2 for PUSCH indicates the 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 with PDSCH or PUSCH and the number L of consecutive symbols counted from the symbol S.
- mapping type A there are two mapping types: one is mapping type A and the other is mapping type B.
- a demodulation reference signal is mapped to the PDSCH/PUSCH resource based on the start of the slot, and depending on other DMRS parameters, one of the symbols of the PDSCH/PUSCH resource or Two symbols can be used as the DMRS symbol(s).
- the DMRS uses the third symbol (symbol #2) or the fourth symbol (symbol #2) in the slot depending on the RRC signaling. It is located at #3).
- PDSCH/PUSCH mapping type B DMRS is mapped based on the first OFDM symbol of the PDSCH/PUSCH resource.
- DMRS is located in the first symbol allocated for PDSCH/PUSCH.
- PDSCH/PUSCH mapping in this specification The type may be referred to as a mapping type or DMRS mapping type.
- PUSCH mapping type A may be referred to as mapping type A or DMRS mapping type A
- PUSCH mapping type B may be referred to as mapping type B or DMRS mapping. It is also referred to as Type B.
- the scheduling DCI includes a frequency domain resource assignment (FDRA) field that provides assignment information about resource blocks used for PDSCH or PUSCH.
- FDRA frequency domain resource assignment
- the FDRA field provides the UE with information about cells for PDSCH or PUSCH transmission, information about BWP for PDSCH or PUSCH transmission, and information about resource blocks for PDSCH or PUSCH transmission.
- the PDSCH based on DL SPS is sometimes called SPS PDSCH
- the PUSCH based on UL CG is sometimes called CG PUSCH
- the PDSCH dynamically scheduled by the DCI carried by the PDCCH is sometimes called DG PDSCH
- the PDCCH is called DG PDSCH.
- the PUSCH dynamically scheduled by the carrying DCI is also called DG PUSCH.
- a control resource set which is a set of time-frequency resources through which the UE can monitor the PDCCH, may be defined and/or set.
- One or more CORESETs may be set to the UE.
- CORESET consists of a set of physical resource blocks (PRBs) with a time duration of 1 to 3 OFDM symbols. PRBs constituting CORESET and CORESET duration may be provided to the UE through higher layer (eg, RRC) signaling.
- PRBs physical resource blocks
- RRC radio resource block
- the master information block (MIB) on the PBCH provides the UE with parameters (e.g., CORESET#0 setting) for monitoring the PDCCH for scheduling the PDSCH carrying system information block 1 (SIB1). do.
- the PBCH may also indicate that there is no SSB1 associated with it, in which case the UE may be instructed not only the frequency range over which it can assume that there is no SSB associated with SSB1, but also other frequencies to search for the SSB associated with SIB1.
- CORESET#0 which is at least a CORESET for scheduling SIB1, can be set through MIB or dedicated RRC signaling.
- 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 (UE-specific search space (USS)) set.
- CCS common search space
- USS UE-specific search space
- Each CORESET setting is associated with one or more search space sets, and each search space set is associated with one CORESET setting.
- a set of PDCCH candidates may be monitored in one or more CORESETs on an active DL BWP on each activated serving cell for which PDCCH monitoring is configured, where monitoring includes receiving and decoding each PDCCH candidate according to the monitored DCI formats. It implies.
- the following table illustrates the DCI format that the PDCCH can carry.
- DCI format 0_0 is used to schedule transport block (TB)-based (or TB-level) PUSCH
- DCI format 0_1 is used to schedule TB-based (or TB-level) PUSCH or code block group (CBG).
- CBG code block group
- DCI format 1_0 is used to schedule a TB-based (or TB-level) PDSCH
- DCI format 1_1 is used to schedule a TB-based (or TB-level) PDSCH or CBG-based (or CBG-level) PDSCH.
- DCI format 0_0 and DCI format 1_0 have a fixed size since the BWP size is initially given by RRC.
- DCI format 0_0 and DCI format 1_0 have fixed sizes of the remaining fields except for the size of the frequency domain resource assignment (FDRA) field, but the size of the FDRA field is determined by the related parameters by the BS. This can be changed through settings.
- the size of the DCI field of DCI format 0_1 and DCI format 1_1 can be changed through various RRC reconfigurations by the BS.
- DCI format 2_0 may be used to deliver dynamic slot format information (e.g., SFI DCI) to the UE
- DCI format 2_1 may be used to deliver downlink pre-emption information to the UE
- DCI format 2_4 Can be used to inform UL resources for which UL transmission from the UE should be cancelled.
- cells may be interpreted according to context.
- a cell may mean a serving cell or a specific carrier.
- a cell may be composed of one DL component carrier (CC) and 0 to 2 UL CC(s), but the implementations described below are not limited to this.
- CC DL component carrier
- cell and CC may be used interchangeably (unless otherwise specified).
- the implementations described below can be applied by replacing cell/CC with (active) BWP in the serving cell.
- the cell/CC includes PCell, SCell, PSCell, etc. that can be configured/expressed in a carrier aggregation (CA)/dual connectivity (DC) scenario. It can also be used as a concept.
- CA carrier aggregation
- DC dual connectivity
- Implementations 1 to 11 of the present specification described below may be applied individually or in combination of two or more.
- the NES mode of the BS that is, a mode for energy saving of the BS, may be defined.
- a BS operating in NES mode may suspend/hold DL or UL transmission for a specific time or reduce power consumption of the BS by limiting transmission/reception operations in a specific frequency band.
- the NES mode may collectively refer to the operation modes of the BS and/or UE that are defined/set/instructed for this purpose.
- NES mode can only be maintained for a certain time period.
- the time period operating in NES mode is expressed as the NES duration.
- NES mode may be effective only for certain frequency resources.
- the frequency resource corresponding to the NES mode is referred to as the NES band.
- the NES mode can be set by the BS through separate upper layer (e.g., RRC) configuration/signaling, or through other control channels (e.g., PDCCH/DCI-based indication) or data channels (e.g., PDSCH, PUSCH). Can be dynamically set to BS/UE.
- the BS may turn on/off a specific time, specific frequency, specific antenna resource, etc. during the corresponding NES mode, and may not transmit/receive related data channels, control channels, and control signals.
- the UE may turn on/off a specific time/frequency/antenna resource, etc. during the corresponding NES mode and may operate in the expectation that related channels/signals will not be transmitted.
- a BWP (hereinafter referred to as NES BWP) for the NES mode may be defined/configured in a UE for which the NES mode has been defined/configured.
- the NES BWP may be a separate BWP that operates only in NES mode, in which case the BWP may be undefined or deactivated in non-NES mode.
- a specific (one) BWP may be set differently in NES mode and non-NES mode.
- a specific BWP may be set as NES-BWP during the NES duration period and as a (different) separate BWP during other periods.
- the setting method and constraints of the NES BWP can be defined/set separately from the conventional BWP. For example, in NES BWP, PDCCH monitoring is not performed, but aperiodic CSI-RS signaling and reporting may be set. As another example, in NES BWP, the period of periodic CSI-RS may be reinterpreted.
- Figure 7 illustrates bandwidth part types.
- BWPs can be classified as follows: initial BWP, firstActive BWP, default BWP and (regular) BWP.
- the initial BWP is used to perform the initial connection process.
- IDLE mode e.g.
- RRC_IDLE when transitioning from CONNECTED mode (e.g., RRC_CONNECTED), the UE obtains information about CORESET#0 from the master information block (MIB) carried by the PBCH, and the minimum remaining in CORESET#0 You can find the PDCCH used to schedule system information (remaining minimum system information, RMSI), for example, the initial BWP is used to receive information before the UE attaches to the network/BS, and the initial BWP is mainly used to Used to receive system information block (SIB) and random access related information, generally used in RRC_IDLE In some scenarios, only 1 BWP at a time on the serving cell Only the configured DL BWPs may be active.
- SIB system information block
- the active DL BWP is the BWP that is active immediately after the initial connection or PSCell/SCell addition is completed.
- the firstActiveDownlink-Id and firstActiveUplinkBWP-Id in the serving cell settings are changed when the PCell is changed, the PSCell is added/changed, or the SCell is changed.
- BWP switching for the serving cell is used to activate an inactive BWP and deactivate an active BWP at a time.
- BWP switching is performed by PDCCH indicating downlink allocation or uplink grant (e.g., BWP indicated by bandwidth part indicator in DCI format 0_1 or DCI format 1_1 is activated) through serving cell configuration.
- RRC It can be controlled by signaling, or by a MAC entity upon initiation of a random access process or upon detection of a consistent Listen-Before-Talk (LBT) on the SpCell.
- LBT Listen-Before-Talk
- the BWP used for initial connection i.e., initial BWP
- SCell(s) the BWP used after initial activation can be set through dedicated RRC signaling.
- BWP(s) other than the initial BWP of the PCell i.e. BWP(s) of the PCell other than the initial BWP, and BWP(s) of the SCell(s)
- BWP(s) of the SCell(s) is established to the UE through dedicated RRC signaling, which is signaling sent on a dedicated control channel (DCCH) logical channel between the network and a single UE. Therefore, according to standard regulations up to NR Rel-17, BWP switching is instructed/configured UE-specifically. Alternatively, in some implementations of the present specification, unique BWP switching behavior in NES mode may be specified.
- a timer e.g., inactivity timer
- NES mode may switch to a dormant BWP or NES BWP when the timer expires.
- the timer when the timer expires, it is switched to the default BWP (as in conventional operation), and if DL/UL transmission does not occur (e.g., schedule/set) for a certain period of time in the default BWP, it may be switched to a dormant BWP or NES BWP.
- the dormant BWP is one of the downlink BWPs set by the network through dedicated RRC signaling.
- the UE stops monitoring the PDCCH on/for its SCell but continues to perform CSI measurements, automatic gain control (AGC) and beam management.
- AGC automatic gain control
- the network may set one BWP as a dormant BWP.
- Implementations of the present specification described below may be applied independently under the conditions described in each implementation, may be set to apply only during the duration of the NES, or may be applied only in the NES band.
- dormant state is not limited to meaning only that the corresponding cell/BWP is in a dormant state (e.g., dormant BWP).
- the dormant state may be interpreted differently depending on the context.
- dormant state refers to the deactivated state of a specific cell, or it can be interpreted as a specific state for power/energy saving (e.g., NES mode, NES duration, NES band, NES BWP, etc.) there is.
- the non-dormant state may be interpreted differently depending on the context.
- the non-dormant state means the activated state of a specific cell, or can be interpreted as an operating state other than NES mode (e.g., non-NES BWP).
- a specific operation e.g., SCell dormancy indication
- SCell dormancy indication for a specific SCell (for multiple UEs) may be set/instructed in a group common manner.
- the SCell dormancy instruction converts the active BWP of a specific SCell (or group of SCells) set in the UE to a dormant BWP and restricts PDCCH reception in the corresponding dormant cell/BWP (during the period when data transmission/reception is not set) to the UE. can reduce power consumption.
- the SCell dormancy indication provided by the conventional NR Rel-17 is a method of changing the active BWP of each SCell set for each UE to a dormant BWP (or may be indicated on a per-SCell group basis), using 'SCell dormancy indication' such as DCI format 1_1. It can be set using fields.
- the DCI is set exclusively for each UE.
- the SCell dormancy indication method using DCI format 2_6 was introduced in Rel-16. Since the DCI can be transmitted in a group common manner, using it, the SCell (corresponding to a specific frequency) for multiple UEs can be collectively changed to the dormant state.
- the DCI format i.e., DCI format 2_6
- can provide SCell sleep indication only during inactive time when DRX is set e.g., Long DRX setting
- WUS wake up signal
- the dormant SCell does not require transmission/reception of data channels such as PDSCH/PUSCH and transmission/reception of control channels/signals such as PDCCH, the corresponding features not only save power of the UE but also save power/energy of the BS. There may also be benefits in terms of savings. If the BS switches the SCell corresponding to a specific frequency to a dormant state for multiple UEs at once, the power/energy of the BS required for transmission/reception at that frequency can be saved. However, for this purpose, if the DCI-based indication method supported by the conventional NR is used, the BS must individually transmit DCI including the SCell dormancy indication to all UEs for which the corresponding SCell is configured.
- a group common (GC) indication method that can indicate/set SCell dormancy indication to multiple UEs at once may be introduced.
- the above GC instructions are not limited to DCI-based instructions.
- the GC indication may be set/indicated through a specific DCI, or may be set/indicated through higher layer signaling such as a MAC control element (CE).
- CE MAC control element
- the GC instruction can be set/applied equally to SCell activation/deactivation.
- the GC instruction may be set/applied for the purpose of GC instructing BWP switching for the same specific cell. For example, if a cell of the same frequency resource is configured for all of multiple UEs, BWP switching for the cell may be commonly indicated for the group. At this time, the NES BWP described in Implementation 1 may be set to this specific BWP.
- BWP#1 and BWP#2 are set for UE#1, BWP#1 and BWP#3 are set for UE#2, and the frequency resources of UE#1's BWP#1 and UE#2's BWP# If the frequency resources of 1 are the same, BWP#1 is used as NES-BWP, and in non-NES mode, UE#1 operates in BWP#2 and UE#2 operates in BWP#3, and then in non-NES mode to NES mode. When transitioning to , both UE#1 and UE#2 can perform BWP switching to BWP#1. At this time, the BWP#1 may be set as the specific BWP.
- implementations of the present specification regarding GC instructions that can instruct/configure configuration/operation for a specific SCell to a plurality of UEs are described.
- instruction(s) regarding 'SCell dormancy' and/or 'SCell activation/deactivation' and/or 'BWP switching for specific BWP' may be set to a plurality of UEs.
- GC instructions can be performed using one of the following:
- Method 1 New DCI format and/or instructions for 'SCell dormancy' and/or 'SCell activation/deactivation' and/or 'BWP switching for specific BWP' A new radio network temporary identifier (RNTI) may be introduced.
- RNTI radio network temporary identifier
- the indication field for all cell(s) (which can be set for DL/UL transmission of the BS transmitting the corresponding DCI) is set/configured in bitmap form. It can be.
- Each bit of the bitmap may mean an indication for each cell, or may mean an indication for each cell group (predefined or set (e.g., signaled to a higher layer)).
- the indication field for each cell (which can be set for DL/UL transmission of the BS transmitting the corresponding DCI) can be set/configured in the form of an index.
- the index used as the field value is a value that can be identified equally by all UE(s) (e.g., frequency band name, carrier index, etc.) or a value uniquely assigned to each cell (e.g., cell index).
- the newly introduced DCI format can have the CRC scrambled with an RNTI that can be monitored by multiple UEs (i.e., not UE-specific). Additionally, a cell-specific SS set (eg, type-3 CSS) may be set for the PDCCH including the corresponding DCI.
- a cell-specific SS set eg, type-3 CSS
- the DCI format for GC indication may be transmitted/received in the SS set, that is, the CSS set, in which the search space type is set to "common" for the DCI format.
- Method 2 A field for GC indication for the above-mentioned purpose may be added to the group common DCI (e.g., DCI format 2_0) defined in the conventional NR.
- group common DCI e.g., DCI format 2_0
- Method 2-2 The indication field for all cell(s) (which can be set for DL/UL transmission of the BS transmitting the corresponding DCI) can be set/configured in bitmap form. Each bit of the bitmap may mean an indication for each cell, or may mean an indication for each cell group (defined in advance or set (e.g., signaled to a higher layer)).
- the indication field for each cell (which can be set for DL/UL transmission of the BS transmitting the corresponding DCI) can be set/configured in the form of an index.
- the index used as the field value is a value that can be identified equally by all UE(s) (e.g., frequency band name, carrier index, etc.) or a value uniquely assigned to each cell (e.g., cell index).
- DCI format 2_6 can be reused as a GC instruction for the above purpose.
- a field indicating that DCI format 2_6 is set to the corresponding GC instruction may be set in DCI format 2_6.
- a 1-bit field for setting the NES mode is added to DCI format 2_6, and the NES mode can be set/indicated to be on/off through that field.
- SCell dormancy instruction to a plurality of UEs can be provided.
- the bandwidth part indicator in DCI format 0_1, 0_2, 1_1, and/or 1_2 may be used for indication regarding 'BWP switching for a specific BWP'.
- the corresponding GC instructions may be implemented through DCI-based instructions, such as method(s) 1/2/3 listed above, but are not limited to this.
- the GC instruction may be implemented through any DL channel and/or control signal that can be transmitted/configured to multiple UEs.
- the corresponding GC indication may be provided to a plurality of UEs through signaling such as MAC CE.
- the GC DCI supported by the conventional NR can be used as a GC instruction for the above purpose during the NES duration.
- GC DCI supported by conventional NR can be used as a GC instruction for the above purpose.
- the UE that receives it may determine that the instruction is a setting for the NES mode. For example, when GC instructs dormant state transition for a specific SCell through a specific DCI format, the UE (receiving this) can set the point in time (e.g. slot) at which it received the PDCCH as the start point of the NES duration. there is. In addition, when GC indicates non-dormant state transition for a specific SCell through a specific DCI format, the UE (receiving this) sets the point in time (e.g. slot) at which the PDCCH is received as the end point of the NES duration. You can.
- the start and end time of the NES duration may be set based on a specific application delay after the UE receives the corresponding PDCCH.
- the start and/or end point of the NES duration can be set/indicated separately through the corresponding DCI.
- the start and end times may be separately indicated through the corresponding DCI, or the start time may be separately indicated through the corresponding DCI and the interval between the start and end times may be set/defined in advance.
- the time point can be set separately through the relevant DCI.
- This separately set application time is set to a specific time, such as a time point through a system frame number (SFN) or a slot index, or a relative time, such as a slot offset at a specific point in time (such as receiving the corresponding DCI). It can be set/indicated in the form of an offset.
- ACK feedback for the GC indication may be defined.
- the UE that has received the corresponding GC instruction can independently transmit an ACK to the BS.
- the BS receives ACK feedback from all UE(s) that expect the operation set by the GC instruction for a specific SCell to be applied, the BS can change the SCell (or corresponding frequency resource) to a dormant state or turn it off. .
- the same operation can be individually configured/instructed through a UE-dedicated DCI.
- dormant BWP cannot be set for SpCell (i.e., PCell or PSCell) and/or PUCCH cell. That is, operations such as prohibiting transmission of data channels (eg, PDSCH/PUSCH) or stopping PDCCH monitoring cannot be set in these cells.
- the corresponding operations e.g., PDCCH monitoring prohibited, PUCCH transmission prohibited, etc.
- dormant state can be set.
- a dormant BWP may be set in the corresponding cell, or an NES BWP may be set.
- all SCells associated with it may be dormant.
- all SCells associated with the PUCCH SCell may be switched to the dormant state (even without separate signaling).
- the corresponding PUCCH SCell may be switched to the dormant state (even without separate signaling).
- the corresponding PUCCH cell may also be automatically switched to the non-dormant state. Or, in the same situation, if the PUCCH SCell is switched to the non-dormant state, all SCells connected to it may be switched to the non-dormant state.
- the operation/point of return to the non-dormant state may also be set. For example, if switching to the dormant state is set for these cells, the corresponding cells can return to the non-dormant state (without separate signaling) after a 'specific time' that can be defined/set in advance. At this time, the 'specific time' to return to the non-dormant state can be set using RRC, DCI, etc. In some implementations, conventional methods of triggering BWP switching may also be applied for these cells.
- switching to the dormant state may mean switching to a dormant BWP or switching to a NES BWP. Additionally, in this specification, the dormant BWP can be applied in place of the NES BWP.
- the dormant BWP may be configured for beam failure detection (BFD) and beam failure recovery (BFR). Additionally, periodic CSI (P CSI) reporting and/or semi-persistent (SP) CSI reporting may be set. However, aperiodic CSI reporting is not set up. If the BWP of a specific cell is in the dormant BWP state and continuous and/or semi-persistent CSI reporting as above is set, the UE must periodically perform CSI measurement. Additionally, for this purpose, the BS must periodically transmit a CSI-RS signal on the corresponding cell.
- P CSI periodic CSI
- SP semi-persistent
- such periodic signal transmission/reception and measurement may cause power consumption, and when necessary (e.g., when NES mode is set), the period of the signal may be increased or Alternatively, a power reduction effect can be expected by holding the signal transmission.
- a signal for channel measurement can be transmitted/received and CSI measurement can be set only during a specific time period before a specific cell switches from the dormant state to the non-dormant state.
- the specific time interval may be defined or set in advance (e.g., higher layer signaling).
- a UE with NES mode set can expect that CSI reporting will not be set before a separately set preparation time (or preparation period) when a specific cell is in a dormant state. Or, even if CSI reporting is set, it can be ignored/dropped.
- the UE may perform the configured CSI reporting during the preparation time. there is.
- aperiodic CSI reporting may be set in a dormant state (e.g., dormant BWP). For example, even if the UE is not monitoring the PDCCH in that cell/BWP (e.g., even in the dormant BWP), the corresponding CSI reporting may be set from the PCell to the corresponding SCell. That is, even if an aperiodic CSI report is triggered for the cell in a dormant state, the UE performs CSI measurement through CSI-RS (and/or CSI interference measurement (CSI-IM)) on the cell and obtains the results. can be reported on PUSCH.
- CSI-RS and/or CSI interference measurement (CSI-IM)
- the BS and UE may operate by reinterpreting the period of the periodic/semi-persistent CSI report to a larger value.
- the UE may expect that in the dormant state (e.g., dormant BWP), aperiodic CSI reporting is configured and periodic/semi-persistent CSI reporting is not configured.
- a supplementary UL (SUL) band is configured for the UE and simultaneous transmission in the SUL and non-SUL bands is not possible, the UE may transmit UL only in one of the SUL or non-SUL bands at a specific time. It may be possible. However, each BWP for SUL and non-SUL bands/cells can be set independently.
- one of the two bands/cells may be set to a dormant state. For example, if the SUL band is configured and a UE that is not capable of simultaneous transmission in the SUL band and non-SUL band schedules/configures UL transmission in the SUL band/cell, the non-SUL band/cell is scheduled (without separate signaling). -SUL bands/cells can be switched to a dormant state (e.g., switched to a dormant BWP).
- a dormant state e.g., switched to a dormant BWP
- the SUL band is configured and a UE that is not capable of simultaneous transmission in the SUL and non-SUL bands is scheduled/configured for UL transmission in the non-SUL band/cell, it can schedule/configure the SUL band/cell (even without separate signaling).
- a cell may switch to a dormant state (e.g., switch to a dormant BWP).
- BWP switching operation is performed for a pair of DL BWP and UL BWP. That is, for one BWP switching setting, the DL BWP and UL BWP are switched simultaneously.
- switching of DL BWP and switching of UL BWP can be set separately even in TDD mode. That is, in some scenarios, the DL BWP and UL BWP can be set to switch independently even in TDD mode.
- the active DL BWP is set to be a non-dormant BWP
- the active UL BWP is set to be a dormant BWP. It can be.
- the BS and/or UE may independently switch only the UL BWP to a non-dormant BWP without switching the DL BWP.
- the BS and/or UE do not switch the DL BWP, but only switch the UL BWP to the dormant BWP. can do.
- the pair of DL BWP and UL BWP may be set as follows, and DL/UL BWP switching may be set/instructed at the same time.
- the above DL/UL BWP pair can be set/reset to the UE(s) using methods such as RRC and/or MAC CE, and each DL/UL BWP pair indication is set through separate signaling such as DCI. /can be indicated. For example, it may be indicated (e.g., an index in Table 8) via a field in the (GC) DCI that triggers the corresponding BWP switching, or in the case of a non-DCI-based trigger (e.g., via the expiration of a timer, etc.) For BWP switching), a specific DL/UL BWP pair may be defined/set as the default DL/UL BWP.
- BWP switching is indicated using the conventional (2-bit) BWP indicator. It can be.
- the BS and UE return to the previous non-NES BWP or the default BWP (or firstActive BWP, initial BWP).
- the switching instruction for NES mode is used as the BWP switching instruction.
- a 1-bit indicating that it is for NES use may be required. That is, if different BWP settings are provided for one BWP (i.e., for one BWP index) in NES mode and in non-NES mode, a 1-bit indicating NES use may be required.
- a NES BWP may need to be associated with one of the non-NES BWP(s).
- the BWP IDs of the two BWPs may be the same.
- NES BWP can be set for each UE, when changing to NES mode, it can automatically switch to NES BWP.
- the index of the BWP to be switched (i.e. switched-to) among the two BWPs is indicated through BWP switching, or switched to by a pre-defined rule.
- -to BWP can be specified.
- non-NES BWP-specific NES BWP switching i.e. selecting a NES BWP that overlaps (or is close to) a non-NES BWP.
- the UE is configured with BWP#1 for non-NES and BWP#2 and BWP#3 for NES, and switches from BWP for non-NES to BWP for NES through BWP switching (and then BWP#2 )
- BWP#3 is not indicated and switching to a BWP for NES is instructed, it can be switched to a BWP closer to BWP#1 among BWP#2 and BWP#3 according to a predefined rule.
- DCI configuration Standalone SCell dormancy instruction DCI or SPS release (release) The same way as the DCI field configuration method of DCI (fill some/specific fields of the existing scheduling DCI with 0 (or 1) or other Some/specific fields may be reused for switching instruction purposes to NES BWP.
- Reinterpret the HARQ ID i.e. HARQ process number
- Reinterpret the HARQ ID in the same way as the DCI field configuration method of the SPS release DCI, or reuse it as a BWP switching method (i.e., use the DCI that indicates switching to BWP in the same way as the field configuration method of the SPS release DCI).
- HARQ ID i.e. HARQ process number
- BWP switching method i.e., use the DCI that indicates switching to BWP in the same way as the field configuration method of the SPS release DCI.
- ** 8-1 Applies to all UE(s) for which the corresponding cell is configured. That is, the same BWP (for NES mode) is applied to the UE(s) for which the corresponding cell is configured.
- a UE group may be defined/set/instructed for the purpose of distributing the traffic load of BS/UE or through grouping according to distance from the BS. In this case, the UE group index may be set exclusively for each UE.
- the BWP ID indication may also be included in the signaling/command.
- a timer may be introduced for BWP switching between conventional normal BWP and NES BWP.
- a specific DL (or UL) cell/carrier to be switched to the NES BWP may be set separately (through RRC signaling, etc.).
- BWP switching (from or to NES BWP) through the above-described method(s) is indicated through a DCI configured for GC indication or a (UE group-specific) scheduling DCI or (UE group-specific) MAC CE.
- the (NES) BWP to be switched may be indicated by an index that UEs can commonly understand. For example, a band name, carrier/cell index can be used as the index, or a bitmap that can distinguish a specific cell can be used to indicate BWP switching.
- the BWP for NES with a relatively small bandwidth can be set to always be an active or dormant BWP.
- the BWP for NES can always be set to a specific RB set or RB set group (or to include the corresponding RB set (group)) within the initial (or default) BWP.
- an initial BWP (hereinafter referred to as BWP1) may be set for the CONNECTED mode UE (as described in the conventional standard), and a separate initial BWP (hereinafter referred to as BWP2) may be set for the NES mode. Additionally, as for the two initial BWPs (i.e., BWP1 and BWP2), BWP1 (or BWP2) may be set as a subset of BWP2 (or BWP1).
- BWP1 (or BWP2) is composed of a certain percentage (e.g., 50%) of RBs among the RBs that make up BWP2 (or BWP1), or a certain number (e.g., N number of RBs that can be determined or set in advance). can be set to .
- the subset may be composed of contiguous RBs starting from the lowest/highest RB of the BWP including the subset.
- UE-specific BWP and UE-common BWP are set separately based on the UE-common initial BWP information received through System Information Block Type 1 (SIB1), and a separate timer for NES mode expires or a specific NES If signaling/commands are provided to the UE(s) to set/instruct the mode (or NES BWP) to be used/switched to/from, it may be possible for the BS and UEs to operate by switching to the UE-common initial BWP.
- SIB1 System Information Block Type 1
- Figure 8 illustrates Discontinuous Reception (DRX) operation.
- Figure 8 illustrates a DRX cycle for a UE in RRC_CONNECTED state.
- DRX defines a structure for UEs in the RRC_IDLE state (hereinafter expressed as I-DRX) and a structure for UEs in the RRC_CONNECTED state (hereinafter expressed as C-DRX), and both DRX structures allow the UE to receive DL signals. It is designed to reduce unnecessary power consumption in other sections by defining predictable sections (e.g., active time sections or on-duration sections) to occur periodically.
- the start position of the on-duration is generated periodically, and the size of the cycle that can be configured at this time (i.e., DRX cycle) is determined by the RRC signaling provided by the BS to the UE. It can be determined/set through higher layer signaling, etc.
- the DRX cycle consists of On Duration and Opportunity for DRX.
- the DRX cycle defines the time interval at which the on duration is periodically repeated.
- On duration indicates the time period in 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 starts an inactivity timer and remains awake. On the other hand, if no PDCCH is successfully detected during PDCCH monitoring, the UE enters a sleep state after the on duration ends.
- the UE when performing the process and/or method according to the implementation(s) of this specification, the UE may perform PDCCH monitoring/reception discontinuously in the time domain.
- the PDCCH reception occasion e.g., slot with PDCCH search space
- the UE can continuously perform PDCCH monitoring/reception in the time domain.
- the PDCCH reception time eg, slot with PDCCH search space
- PDCCH monitoring may be limited in the time section set as the measurement gap.
- DRX configuration information is received through upper layer (eg, RRC) signaling, and DRX ON/OFF is controlled by the DRX command of the MAC layer.
- RRC Radio Resource Control
- DRX may mean C-DRX and/or I-DRX.
- the section in which the UE (with DRX configured) can expect to receive a DL signal during the DRX cycle is referred to as the DRX activation time (or on duration).
- the method(s) of the above-described implementations 1 to 8 may (characteristically) be set/applied differently for the DRX active time and other time sections in the case of a UE with DRX configured.
- some implementations of the above-described specification may be applied/set for the DRX activation time and not applied/set for other sections.
- some implementations of the present specification described above may not be applied/configured for the DRX active time (e.g., BS and UE operate in non-NES mode), but NES mode operation may be applied/configured for other periods. .
- NES BWP (described in Implementation 1) can be set separately for DRX active time and other time periods.
- BWP switching and SCell activation/deactivation operations through group common instructions (described in Implementation 2) may be set/applied differently in the DRX activation time and other time sections.
- the UE(s) and BS may operate in NES mode during the DRX active time, and the UE(s) and BS may operate in non-NES mode in other sections. Or it could work the other way around.
- the method(s) of implementations 1 to 8 described above may be applied differently for each DRX setting to a plurality of DRX settings. That is, for some DRX configuration(s) (or when those partial DRX configuration(s) are provided to the UE(s)) the UE(s) and BS operate in NES mode, and for other DRX configurations (or when the corresponding partial DRX configuration(s) are provided to the UE(s)) When different DRX setting(s) are provided to the UE(s), the UE(s) and BS may operate in non-NES mode.
- one DRX setting (i.e., DRX setting switching) among a plurality of DRX settings is (for example), the UE receives N DRX setting(s) through (UE-only) RRC signaling, etc.
- N DRX setting(s) may be configured/instructed to the UE through RRC signaling (or group common DCI (or MAC CE)).
- RRC signaling or group common DCI (or MAC CE)
- the BWP will operate as non-NES BWP (or NES BWP). can be changed.
- the method(s) of implementations 1 to 8 described above may be applied differently for each DRX setting to a plurality of DRX settings. For example, in some DRX configuration(s) (or when such partial DRX configuration(s) are provided to the UE(s), a specific one of the above-described implementations is applied/configured, and other DRX configuration(s) In (or when corresponding other DRX configuration(s) are provided to the UE(s)), another specific one of the above-described implementations may be applied/configured.
- the method(s) of implementations 1 to 8 described above may be set/applied differently for each BWP. For example, in some BWPs (or when those other BWPs are the active BWP) the UE(s) and the BS operate in NES mode, and in other BWPs (or when those other BWPs are the active BWP) they operate in NES mode. It can operate in non-NES mode (when the existing BWP is changed to the active BWP).
- a timer that operates to fallback the BWP to the default BWP (or initial BWP or NES BWP), etc., described in implementation 1, for switching between the NES BWP and the non-NES BWP described in implementation 8.
- Timers, timers that can be introduced for selection/switching between UE-specific BWP and UE-common BWP, etc. can be held or (re)started during NES mode (or non-NES mode). Alternatively, the timer may be put on hold during the DRX active time (or other time intervals).
- the timer may be held without decreasing or increasing, and the count operation may be resumed again when the NES mode (e.g., NES duration) ends. there is.
- the SCS that determines the slot in which the timer decrements is the SCS of the PDCCH (e.g., directing NES mode switching) and the PDCCH. It can be set based on the smaller value of the SCS of the PDSCH or PUSCH scheduled through . Alternatively, in some implementations, it may be set based on the smallest SCS among the SCS of the PDCCH and the SCS of the PDSCH (or the SCS of the BWP in an active state and/or the SCS of the BWP in an inactive state).
- the timer may be set/operated for each cell group (which may be set in advance through RRC signaling, etc.).
- the same DRX configuration is set in advance to operate only some specific cell(s) in NES mode (or non-NES mode) among the cells configured for the UE.
- the cells belonging to (or DRX group) may be grouped and the timer may be set to operate (e.g., increase/decrease/hold/(re)start) on a cell group basis.
- BWP switching may be indicated through UE group-common (GC) DCI as in Implementation 2 or Implementation 8. Since the existing DCI-based BWP switching is UE-specific and schedules PDSCH or PUSCH (on the changed BWP) through the corresponding DCI, when the BS receives HARQ-ACK feedback or PUSCH from the UE that performed BWP switching, the UE The BS can determine whether to perform BWP switching.
- GC UE group-common
- PUCCH resources (or candidates thereof) for HARQ-ACK feedback corresponding to GC DCI can be set for each UE.
- the PUCCH resource (or its candidates) may be located on a (changed) BWP (e.g., NES BWP) after performing BWP switching, and considering that only ACK information is valid, PUCCH format 0 and/or PUCCH format 1 It can be set to .
- a single cyclic shift index is set (for the configured PUCCH or for each configured PUCCH resource), and after performing BWP switching through GC DCI, ACK is sent through the corresponding PUCCH format 0.
- the corresponding set cyclic shift index value may be applied.
- the timing at which PUCCH will be transmitted and/or one of a plurality of preset PUCCH candidate resources may be indicated through a specific field of GC DCI.
- the interpretation method for the same code-point may be set (differently) in advance for each UE.
- UE #1 interprets it as an instruction to transmit PUCCH in slot n1, and UE #2 instructs UE #2 to transmit PUCCH in slot n2. It can be set in advance (by the BS) to the UE(s) so that it is interpreted as an instruction.
- BWP switching may be indicated via UE group-common (GC) DCI (or MAC CE). Additionally, at the same time, existing (UE-specific) DCI-based BWP switching may also be indicated. If the UE receives GC DCI (or GC MAC CE)-based BWP switching and existing DCI-based BWP switching at the same time or at a close time, it may be unclear from the UE's perspective which DCI-based BWP switching to perform.
- GC group-common
- existing DCI-based BWP switching may be indicated. If the UE receives GC DCI (or GC MAC CE)-based BWP switching and existing DCI-based BWP switching at the same time or at a close time, it may be unclear from the UE's perspective which DCI-based BWP switching to perform.
- the ambiguity of UE operation can be resolved by taking this into consideration and determining the standard DCI (or MAC CE).
- the UE can perform BWP switching based on one of the options below, and one option may have a rule defined in advance or be set by the BS.
- the UE performs BWP switching indicated in the last (or earliest) received DCI (or MAC CE);
- the UE performs BWP switching (or BWP switching to NES BWP) indicated through GC DCI (or GC MAC CE); or
- the UE performs BWP switching (or BWP switching to a BWP other than the NES BWP) indicated through the UE-specific DCI.
- a method of switching between BWP switching through GC DCI (or GC MAC-CE) and BWP switching through UE-specific DCI may be defined/set in advance.
- a specific field can be used in the DCI that schedules PDSCH (or PUSCH), or a separate DCI or MAC-CE can be used.
- T_a a set delay
- T_a and T_b can each be defined or set in advance.
- Figure 9 illustrates the flow of DL signal reception in a UE according to some implementations of the present specification.
- the UE may perform operations according to several implementations of this specification in relation to DL signal reception.
- the UE has at least one transceiver; at least one processor; and at least one computer operably connectable to the at least one processor and storing instructions that, when executed, cause the at least one processor to perform operations in accordance with some implementations of the present specification.
- a processing device for a UE includes at least one processor; and at least one computer operably connectable to the at least one processor and storing instructions that, when executed, cause the at least one processor to perform operations in accordance with some implementations of the present specification. May contain memory.
- a computer-readable (non-volatile) storage medium stores at least one computer program that, when executed by at least one processor, includes instructions that cause the at least one processor to perform operations in accordance with some implementations of the present specification. You can.
- a computer program or computer program product is recorded on at least one computer-readable (non-volatile) storage medium and includes instructions that, when executed, cause (at least one processor) to perform operations in accordance with some implementations of the present specification. can do.
- the processing device, the computer-readable (non-volatile) storage medium, and/or the computer program product the operations include: receiving a UE group common indication for a cell (S901); And it may include performing or changing UE operation based on the UE group common instruction (S903).
- the UE group common indication may be a group common indication regarding 'SCell dormancy' or 'SCell activation/deactivation' or 'BWP switching for a specific BWP'. For example, the UE may switch the cell's active BWP to a dormant state based on a group common indication regarding 'SCell dormancy' for the cell.
- the UE may activate or deactivate the cell based on a group common indication regarding activation or deactivation of the cell.
- the UE may switch the active BWP of the cell to another BWP based on a group common indication regarding BWP switching for a specific BWP of the cell.
- the operations include: performing PDCCH monitoring; Based on the PDCCH monitoring, detect the DCI format for the cell in which the first BWP is active; And based on the DCI format including a switching-related indication, it may include performing BWP switching to change the active BWP of the cell from the first BWP to the second BWP.
- the DCI format including the switching-related indication may be detected only in a common search space rather than a search space specific to the user device.
- the DCI format can only be detected in a search space set to CSS.
- the DCI format may include information regarding timing for the BWP switching.
- the operations may include: receiving RRC settings for the DCI format.
- the RRC settings may include settings related to BWP for NES.
- the second BWP may be the BWP for the NES.
- the operations may include: receiving HARQ-ACK feedback related settings for the DCI format.
- the HARQ-ACK feedback-related settings may include settings regarding PUCCH resources related to the DCI format.
- the PUCCH resource may be dedicated to the user device.
- the PUCCH resource may be provided to the user device through dedicated PUCCH configuration.
- the DCI format may include information regarding timing at which HARQ-ACK information for the DCI format will be transmitted.
- Figure 10 illustrates the flow of DL signal transmission in the BS according to some implementations of the present specification.
- the BS may perform operations according to several implementations of this specification with respect to DL signal transmission.
- BS has at least one transceiver; at least one processor; and at least one computer operably connectable to the at least one processor and storing instructions that, when executed, cause the at least one processor to perform operations in accordance with some implementations of the present specification.
- the processing device for the BS includes at least one processor; and at least one computer operably connectable to the at least one processor and storing instructions that, when executed, cause the at least one processor to perform operations in accordance with some implementations of the present specification. May contain memory.
- a computer-readable (non-volatile) storage medium stores at least one computer program that, when executed by at least one processor, includes instructions that cause the at least one processor to perform operations in accordance with some implementations of the present specification. You can.
- a computer program or computer program product is recorded on at least one computer-readable (non-volatile) storage medium and includes instructions that, when executed, cause (at least one processor) to perform operations in accordance with some implementations of the present specification. can do.
- the operations include: transmitting a UE group common indication for a cell (S1001); And it may include performing or changing an operation for the UE(s) on the cell based on the UE group common indication (S1003).
- the UE group common indication may be a group common indication regarding 'SCell dormancy' or 'SCell activation/deactivation' or 'BWP switching for a specific BWP'.
- the BS switches the active BWP of the cell to a dormant state for a plurality of UEs, and , PDCCH transmissions for the plurality of UEs can be stopped on the dormant BWP.
- the UE group common indication for a cell is a group common indication for activation or deactivation of the cell, assuming that the cell is activated or deactivated for the plurality of UEs, DL transmission and/or UL reception can be performed or stopped.
- the active BWP of the cell may be switched to another BWP.
- the operations include: transmitting a PDCCH carrying the DCI format for the cell in which the first BWP is active; Based on the DCI format including a switching-related indication, this may include performing BWP switching to change the active BWP of the cell from the first BWP to the second BWP.
- the DCI format including the switching-related indication can be transmitted only in a common search space, not a search space specific to the user device.
- the DCI format including the switching-related indication may be transmitted only in a common search space rather than a search space specific to the user device.
- the DCI format can be transmitted only in a search space set to CSS.
- the DCI format may include information regarding timing for the BWP switching.
- the operations may include: sending an RRC setting for the DCI format.
- the RRC settings may include settings related to BWP for NES.
- the second BWP may be the BWP for the NES.
- the operations may include: transmitting a HARQ-ACK feedback related setting for the DCI format.
- the HARQ-ACK feedback-related settings may include settings regarding PUCCH resources related to the DCI format.
- the PUCCH resource may be dedicated to the user device.
- the PUCCH resource may be provided to the user device through dedicated PUCCH configuration.
- the DCI format may include information regarding timing at which HARQ-ACK information for the DCI format will be transmitted.
- Implementations of this specification can be used in a wireless communication system, a BS or user equipment, or other equipment.
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Abstract
Description
Claims (14)
- 무선 통신 시스템에서 사용자기기가 하향링크 신호를 수신함에 있어서,물리 하향링크 제어 채널(physical downlink control channel, PDCCH) 모니터링을 수행;상기 PDCCH 모니터링을 기반으로, 제1 대역폭 파트(bandwidth part, BWP)가 활성(active)인 셀에 대한 하향링크 제어 정보(downlink control information, DCI) 포맷을 검출; 및상기 DCI 포맷이 스위칭 관련 지시를 포함하는 것을 기반으로, 상기 셀의 활성 BWP를 상기 제1 BWP로부터 제2 BWP로 변경하는 BWP 스위칭을 수행하는 것을 포함하며,상기 스위칭 관련 지시를 포함하는 상기 DCI 포맷은 상기 사용자기기에 특정적인 탐색 공간이 아닌 공통 탐색 공간에서만 검출되는,하향링크 신호 수신 방법.
- 제1항에 있어서,상기 DCI 포맷은 상기 BWP 스위칭을 위한 시점에 관한 정보를 포함하는,하향링크 신호 수신 방법.
- 제1항에 있어서,상기 DCI 포맷에 대한 무선 자원 제어(radio resource control, RRC) 설정을 수신하는 것을 포함하며,상기 RRC 설정은 네트워크 에너지 절약(network energy saving, NES)용 BWP에 관한 설정을 포함하고,상기 제2 BWP는 상기 NES용 BWP인,하향링크 신호 전송 방법.
- 제1항에 있어서,상기 DCI 포맷에 대한 하이브리드 자동 반복 요청 확인(hybrid automatic repeat request acknowledgement, HARQ-ACK) 피드백 관련 설정을 수신하는 것을 포함하며,상기 HARQ-ACK 피드백 관련 설정은 상기 DCI 포맷과 관련된 물리 상향링크 제어 채널(physical uplink control channel, PUCCH) 자원에 관한 설정을 포함하고,상기 PUCCH 자원은 상기 사용자기기에 전용되는,하향링크 신호 전송 방법.
- 제4항에 있어서,상기 DCI 포맷은 상기 DCI 포맷에 대한 HARQ-ACK 정보가 전송될 타이밍 관련 정보를 포함하는,하향링크 신호 전송 방법.
- 무선 통신 시스템에서 사용자기기가 하향링크 신호를 수신함에 있어서,적어도 하나의 송수신기;적어도 하나의 프로세서; 및상기 적어도 하나의 프로세서에 동작 가능하게 연결 가능한, 그리고, 실행될 때, 상기 적어도 하나의 프로세서로 하여금 동작들을 수행하도록 하는 명령(instruction)들을 저장한, 적어도 하나의 컴퓨터 메모리를 포함하며, 상기 동작들은:물리 하향링크 제어 채널(physical downlink control channel, PDCCH) 모니터링을 수행;제1 대역폭 파트(bandwidth part, BWP)가 활성(active)인 셀에 대한 하향링크 제어 정보(downlink control information, DCI) 포맷을 검출; 및상기 DCI 포맷이 스위칭 관련 지시를 포함하는 것을 기반으로, 상기 셀의 활성 BWP를 상기 제1 BWP로부터 제2 BWP로 변경하는 BWP 스위칭을 수행하는 것을 포함하며,상기 스위칭 관련 지시를 포함하는 상기 DCI 포맷은 상기 사용자기기에 특정적인 탐색 공간이 아닌 공통 탐색 공간에서만 검출되는,사용자기기.
- 무선 통신 시스템에서 프로세싱 장치에 있어서,적어도 하나의 프로세서; 및상기 적어도 하나의 프로세서에 동작 가능하게 연결 가능한, 그리고, 실행될 때, 상기 적어도 하나의 프로세서로 하여금 동작들을 수행하도록 하는 명령(instruction)들을 저장한, 적어도 하나의 컴퓨터 메모리를 포함하며, 상기 동작들은:물리 하향링크 제어 채널(physical downlink control channel, PDCCH) 모니터링을 수행;제1 대역폭 파트(bandwidth part, BWP)가 활성(active)인 셀에 대한 하향링크 제어 정보(downlink control information, DCI) 포맷을 검출; 및상기 DCI 포맷이 스위칭 관련 지시를 포함하는 것을 기반으로, 상기 셀의 활성 BWP를 상기 제1 BWP로부터 제2 BWP로 변경하는 BWP 스위칭을 수행하는 것을 포함하며,상기 스위칭 관련 지시를 포함하는 상기 DCI 포맷은 사용자기기에 특정적인 탐색 공간이 아닌 공통 탐색 공간에서만 검출되는,프로세싱 장치.
- 컴퓨터 판독가능한 저장 매체에 있어서,상기 저장 매체는 실행될 때 적어도 하나의 프로세서로 하여금 동작들을 수행하도록 하는 지시들을 포함하는 적어도 하나의 프로그램 코드를 저장하고, 상기 동작들은:물리 하향링크 제어 채널(physical downlink control channel, PDCCH) 모니터링을 수행;제1 대역폭 파트(bandwidth part, BWP)가 활성(active)인 셀에 대한 하향링크 제어 정보(downlink control information, DCI) 포맷을 검출; 및상기 DCI 포맷이 스위칭 관련 지시를 포함하는 것을 기반으로, 상기 셀의 활성 BWP를 상기 제1 BWP로부터 제2 BWP로 변경하는 BWP 스위칭을 수행하는 것을 포함하며,상기 스위칭 관련 지시를 포함하는 상기 DCI 포맷은 사용자기기에 특정적인 탐색 공간이 아닌 공통 탐색 공간에서만 검출되는,저장매체.
- 무선 통신 시스템에서 기지국이 사용자기기로부터 하향링크 신호를 전송함에 있어서,제1 대역폭 파트(bandwidth part, BWP)가 활성(active)인 셀에 대한 하향링크 제어 정보(downlink control information, DCI) 포맷을 운반하는 물리 하향링크 제어 채널(physical downlink control channel, PDCCH)를 전송;상기 DCI 포맷이 스위칭 관련 지시를 포함하는 것을 기반으로, 상기 셀의 활성 BWP를 상기 제1 BWP로부터 제2 BWP로 변경하는 BWP 스위칭을 수행하는 것을 포함하며,상기 스위칭 관련 지시를 포함하는 상기 DCI 포맷은 상기 사용자기기에 특정적인 탐색 공간이 아닌 공통 탐색 공간에서만 전송되는,하향링크 신호 전송 방법.
- 무선 통신 시스템에서 기지국이 사용자기기로부터 하향링크 신호를 전송함에 있어서,적어도 하나의 송수신기;적어도 하나의 프로세서; 및상기 적어도 하나의 프로세서에 동작 가능하게 연결 가능한, 그리고, 실행될 때, 상기 적어도 하나의 프로세서로 하여금 동작들을 수행하도록 하는 명령(instruction)들을 저장한, 적어도 하나의 컴퓨터 메모리를 포함하며, 상기 동작들은:제1 대역폭 파트(bandwidth part, BWP)가 활성(active)인 셀에 대한 하향링크 제어 정보(downlink control information, DCI) 포맷을 운반하는 물리 하향링크 제어 채널(physical downlink control channel, PDCCH)를 전송;상기 DCI 포맷이 스위칭 관련 지시를 포함하는 것을 기반으로, 상기 셀의 활성 BWP를 상기 제1 BWP로부터 제2 BWP로 변경하는 BWP 스위칭을 수행하는 것을 포함하며,상기 스위칭 관련 지시를 포함하는 상기 DCI 포맷은 상기 사용자기기에 특정적인 탐색 공간이 아닌 공통 탐색 공간에서만 전송되는,기지국.
- 제10항에 있어서,상기 DCI 포맷은 상기 BWP 스위칭을 위한 시점에 관한 정보를 포함하는,기지국.
- 제10항에 있어서,상기 동작들은:상기 DCI 포맷에 대한 무선 자원 제어(radio resource control, RRC) 설정을 전송하는 것을 포함하며,상기 RRC 설정은 네트워크 에너지 절약(network energy saving, NES)용 BWP에 관한 설정을 포함하고,상기 제2 BWP는 상기 NES용 BWP인,기지국.
- 제10항에 있어서,상기 동작들은:상기 DCI 포맷에 대한 하이브리드 자동 반복 요청 확인(hybrid automatic repeat request acknowledgement, HARQ-ACK) 피드백 관련 설정을 수신하는 것을 포함하며,상기 HARQ-ACK 피드백 관련 설정은 상기 DCI 포맷과 관련된 물리 상향링크 제어 채널(physical uplink control channel, PUCCH) 자원에 관한 설정을 포함하고,상기 PUCCH 자원은 상기 사용자기기에 전용되는,기지국.
- 제13항에 있어서,상기 DCI 포맷은 상기 DCI 포맷에 대한 HARQ-ACK 정보가 전송될 타이밍 관련 정보를 포함하는,기지국.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP23796783.1A EP4518453A4 (en) | 2022-04-28 | 2023-04-26 | METHOD, USER EQUIPMENT, PROCESSING DEVICE, AND STORAGE MEDIA FOR RECEIVING A DOWNLINK SIGNAL, AS WELL AS METHOD AND BASE STATION FOR TRANSMITTING A DOWNLINK SIGNAL |
| US18/856,504 US20250267676A1 (en) | 2022-04-28 | 2023-04-26 | Method, user equipment, processing device, and storage medium for receiving downlink signal, and method and base station for transmitting downlink signal |
| CN202380036083.7A CN119072966A (zh) | 2022-04-28 | 2023-04-26 | 接收下行链路信号的方法、用户设备、处理装置和存储介质及发送下行链路信号的方法和基站 |
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| KR20220100826 | 2022-08-11 | ||
| KR10-2022-0124777 | 2022-09-29 | ||
| KR20220124777 | 2022-09-29 | ||
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| WO2025145400A1 (zh) * | 2024-01-04 | 2025-07-10 | 北京小米移动软件有限公司 | 通信方法、装置以及存储介质 |
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|---|---|---|---|---|
| EP3863345A1 (en) * | 2018-10-19 | 2021-08-11 | Guangdong Oppo Mobile Telecommunications Corp., Ltd. | Method and device for receiving information and sending information |
| EP3873126A1 (en) * | 2018-10-26 | 2021-09-01 | NEC Corporation | Radio terminal, radio access network node, and method for these |
| WO2021170311A1 (en) * | 2020-02-28 | 2021-09-02 | Nokia Technologies Oy | Bandwidth part (bwp) enhancement |
| US20210410171A1 (en) * | 2018-11-01 | 2021-12-30 | Samsung Electronics Co., Ltd. | Pdcch monitoring method, apparatus, electronic device and computer readable storage medium |
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| US11985671B2 (en) * | 2020-04-15 | 2024-05-14 | Asustek Computer Inc. | Method and apparatus for reducing power consumption for carrier aggregation in a wireless communication system |
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| EP3863345A1 (en) * | 2018-10-19 | 2021-08-11 | Guangdong Oppo Mobile Telecommunications Corp., Ltd. | Method and device for receiving information and sending information |
| EP3873126A1 (en) * | 2018-10-26 | 2021-09-01 | NEC Corporation | Radio terminal, radio access network node, and method for these |
| US20210410171A1 (en) * | 2018-11-01 | 2021-12-30 | Samsung Electronics Co., Ltd. | Pdcch monitoring method, apparatus, electronic device and computer readable storage medium |
| WO2021170311A1 (en) * | 2020-02-28 | 2021-09-02 | Nokia Technologies Oy | Bandwidth part (bwp) enhancement |
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| HUAWEI, HISILICON: "Corrections on BWP switching using DCI format 0_2/1_2", 3GPP TSG RAN WG1 MEETING #108-E, R1-2202439, 14 February 2022 (2022-02-14), XP052114850 * |
| See also references of EP4518453A4 * |
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| WO2025145400A1 (zh) * | 2024-01-04 | 2025-07-10 | 北京小米移动软件有限公司 | 通信方法、装置以及存储介质 |
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| US20250267676A1 (en) | 2025-08-21 |
| EP4518453A1 (en) | 2025-03-05 |
| EP4518453A4 (en) | 2026-04-29 |
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