Method for receiving downlink control information of a receiving terminal and apparatus applying the method

Abstract

Methods and apparatuses for determining application delay values for minimum scheduling offset limits in a wireless communication system are provided. The method accesses a specific base station through a random access procedure, and then, if a DCI including information for notifying a change in the minimum scheduling offset limit value is received from the base station in slot n of a scheduling cell, the changed minimum scheduling offset limit value is applied in slot n+X of the scheduling cell. Herein, the value of X can be determined based on two parameters such as Y and Z, the value of Y being the minimum scheduling offset limit value to be applied to a scheduled cell scheduled by the DCI, and the value of Z being a value predetermined according to the subcarrier spacing of the scheduling cell. Additionally, the DCI can increment the value of Z by 1 according to the time position at which the DCI is received within slot n.

Description

Technical Field

[0001] The present disclosure relates to a method for receiving downlink control information of a user equipment in a wireless communication system and an apparatus using the method. Background Art

[0002] As more and more communication devices require higher communication capacities, advanced mobile broadband communication is needed compared to existing radio access technologies (RATs). Massive machine type communication (MTC), which provides various services anytime and anywhere by connecting multiple devices and multiple objects, is also a major issue to be considered in next-generation communication. In addition, the design of a communication system that considers services or user equipment (UE) sensitive to reliability and latency is being discussed. The introduction of a next-generation RAT that considers enhanced mobile broadband communication, massive MTC, and ultra-reliable low-latency communication (URLLC) is being discussed. In the present disclosure, for convenience of description, such a technology may be referred to as a new RAT or new radio (NR). NR is also referred to as a fifth-generation (5G) system.

[0003] As the performance and functions of a UE, such as display resolution, display size, processor, memory, and applications of the UE, increase, the power consumption also increases. Since the power supply of the UE may be limited to a battery, it is important to reduce the power consumption. The same applies to a UE operating in NR.

[0004] As an example of reducing the power consumption of a UE, there is cross-slot scheduling. The case where the slot for receiving a physical downlink control channel (PDCCH) is the same as the slot for receiving a physical downlink shared channel (PDSCH) scheduled by the PDCCH is referred to as co-slot scheduling. In cross-slot scheduling, the PDCCH and the PDSCH scheduled by the PDCCH may be in different slots. The PDCCH is generally received and decoded only in some symbols (e.g., the first 3 symbols of a slot) within a slot. When cross-slot scheduling is applied, the UE can save power by making a radio frequency (RF) unit sleep in a symbol (slot) after receiving the PDCCH and before receiving the PDSCH.

[0005] The network sets a minimum applicable K0 / K2 value and may indicate to the UE a minimum applicable slot offset between the PDCCH (more specifically, downlink control information (DCI)) and the PDSCH / PUSCH (physical uplink shared channel) scheduled by the DCI. The minimum applicable slot offset means the minimum value of the offset between the slot for receiving the DCI and the slot for the PDSCH / PUSCH scheduled by the DCI and may be referred to as a minimum scheduling offset.

[0006] Incidentally, when indicating / changing the minimum scheduling offset, it may be defined by an "application delay" value when to apply the indication / change.

[0007] When performing cross-carrier scheduling, in particular, when cross-carrier scheduling is used in a carrier aggregation where the parameter sets of the scheduling cell and the scheduled cell are different, it is necessary to clearly define how to determine the applied delay value. SUMMARY OF THE INVENTION

[0008] TECHNICAL PROBLEM

[0009] The technical objective of the present disclosure is to provide a method for receiving downlink control information of a user equipment in a wireless communication system and a device using the method.

[0010] TECHNICAL SOLUTION

[0011] In one aspect, a method for receiving downlink control information (DCI) of a user equipment (UE) is provided. The method includes the following steps: sending a random access preamble to a base station; receiving a random access response signal for the random access preamble from the base station; receiving, in a time slot n of a scheduling cell, downlink control information (DCI) including information on a change in the value of K0min or K2min, and applying the changed K0min or the changed K2min value starting from time slot n+X of the scheduling cell, where each of K0min and K2min is the minimum scheduling offset limit applied. Here, the X value is i) a first value obtained by multiplying the currently applied K0min (Y) in the scheduled cell scheduled by DCI by 2 μscheduling / 2 μscheduled and then performing ceiling operation and ii) a second value (Z) pre-determined according to the subcarrier spacing (SCS) of the scheduling cell. μscheduling is the subcarrier spacing configuration of the scheduling cell, and μscheduled is the subcarrier spacing configuration of the scheduled cell.

[0012] In another aspect, a user equipment (UE) is provided. The UE includes: a transceiver for transmitting and receiving radio signals; and a processor connected to operate with the transceiver. The processor is configured to: send a random access preamble to a base station; receive a random access response signal for the random access preamble from the base station; receive, in a time slot n of a scheduling cell, downlink control information (DCI) including information on a change in the value of K0min or K2min, and apply the changed K0min or the changed K2min value starting from time slot n+X of the scheduling cell, where each of K0min and K2min is the minimum scheduling offset limit applied. The X value is i) a first value obtained by multiplying the currently applied K0min (Y) in the scheduled cell scheduled by DCI by 2 μscheduling / 2 μscheduledThen, the maximum value among i) the first value obtained by performing ceiling operation and ii) the second value (Z) predetermined according to the subcarrier spacing (SCS) of the scheduling cell. μscheduling is the subcarrier spacing configuration of the scheduling cell, and μscheduled is the subcarrier spacing configuration of the scheduled cell.

[0013] In yet another aspect, a method for a base station to transmit downlink control information (DCI) is provided. The method includes receiving a random access preamble from a user equipment (UE); transmitting a random access response signal for the random access preamble to the UE; transmitting, in a time slot n of a scheduling cell, downlink control information (DCI) including information on a change in the value of K0min or K2min to the UE, and applying the changed K0min or the changed K2min value from time slot n+X of the scheduling cell to communicate with the UE, where each of K0min and K2min is the minimum scheduling offset limit applied. The value of X is i) the first value obtained by multiplying the currently applied K0min (Y) in the scheduled cell scheduled by DCI by 2 μscheduling / 2 μscheduled Then, the maximum value among i) the first value obtained by performing ceiling operation and ii) the second value (Z) predetermined according to the subcarrier spacing (SCS) of the scheduling cell. μscheduling is the subcarrier spacing configuration of the scheduling cell, and μscheduled is the subcarrier spacing configuration of the scheduled cell.

[0014] In yet another aspect, a base station is provided. The base station includes: a transceiver for transmitting and receiving radio signals; and a processor connected to operate with the transceiver. The processor is configured to: receive a random access preamble from a user equipment (UE); transmit a random access response signal for the random access preamble to the UE; transmit, in a time slot n of a scheduling cell, downlink control information (DCI) including information on a change in the value of K0min or K2min to the UE, and apply the changed K0min or the changed K2min value from time slot n+X of the scheduling cell to communicate with the UE, where each of K0min and K2min is the minimum scheduling offset limit applied. The value of X is i) the first value obtained by multiplying the currently applied K0min (Y) in the scheduled cell scheduled by DCI by 2 μscheduling / 2 μscheduled Then, the maximum value among i) the first value obtained by performing ceiling operation and ii) the second value (Z) predetermined according to the subcarrier spacing (SCS) of the scheduling cell. μscheduling is the subcarrier spacing configuration of the scheduling cell, and μscheduled is the subcarrier spacing configuration of the scheduled cell.

[0015] In another aspect, at least one computer-readable medium (CRM) is provided, the at least one CRM including instructions executed by at least one processor. The CRM transmits a random access preamble to a base station; receives a random access response signal for the random access preamble from the base station; receives downlink control information (DCI) including information on a change in the value of K0min or K2min in time slot n of a scheduled cell, and applies the changed K0min or the changed K2min value starting from time slot n+X of the scheduled cell, where each of K0min and K2min is the minimum scheduling offset limit applied. The value of X is i) a first value obtained by multiplying the currently applied K0min (Y) in the scheduled cell scheduled by the DCI by 2 μscheduling / 2 μscheduled and then performing ceiling operation and ii) the maximum value among a second value (Z) predetermined according to the subcarrier spacing (SCS) of the scheduled cell. μscheduling is the subcarrier spacing configuration of the scheduled cell, and μscheduled is the subcarrier spacing configuration of the scheduled cell.

[0016] In another aspect, a device operating in a wireless communication system is provided. The device includes a processor and a memory operably connected to the processor. The processor is configured to: transmit a random access preamble to a base station; receive a random access response signal for the random access preamble from the base station; receive downlink control information (DCI) including information on a change in the value of K0min or K2min in time slot n of a scheduled cell, and apply the changed K0min or the changed K2min value starting from time slot n+X of the scheduled cell, where each of K0min and K2min is the minimum scheduling offset limit applied. The value of X is i) a first value obtained by multiplying the currently applied K0min (Y) in the scheduled cell scheduled by the DCI by 2 μscheduling / 2 μscheduled and then performing ceiling operation and ii) the maximum value among a second value (Z) predetermined according to the subcarrier spacing (SCS) of the scheduled cell. μscheduling is the subcarrier spacing configuration of the scheduled cell, and μscheduled is the subcarrier spacing configuration of the scheduled cell.

[0017] Technical effects

[0018] If different parameter sets (e.g., different subcarrier spacings) are used in the scheduling cell and the scheduled cell to indicate a change in the minimum scheduling offset in carrier aggregation, then when determining the application delay value for the application time indicating the change, the parameter set of the scheduling cell and the parameter set of the scheduled cell, the current minimum scheduling offset value applied to the scheduled cell, a predetermined value depending on the subcarrier spacing of the scheduling cell, etc. are considered, and also the position in the time slot of the DCI indicating the change is considered. Thus, impossible or difficult UE operations can be prevented by determining the application delay value. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 FIG. 1 illustrates a communication system 1 to which the present specification is applied.

[0020] Figure 2 FIG. 2 illustrates a wireless device suitable for the present specification.

[0021] Figure 3 FIG. 3 shows an example of the structure of a signal processing module.

[0022] Figure 4 FIG. 4 shows another example of the structure of a signal processing module in a transmitting device.

[0023] Figure 5 FIG. 5 illustrates an example of a wireless communication device according to an implementation of the present disclosure.

[0024] Figure 6 FIG. 6 shows an example of a processor 2000.

[0025] Figure 7 FIG. 7 shows an example of a processor 3000.

[0026] Figure 8 FIG. 8 shows another example of a wireless device.

[0027] Figure 9 FIG. 9 shows another example of a wireless device to which the present specification is applied.

[0028] Figure 10 FIG. 10 illustrates a portable device to which the present specification is applied.

[0029] Figure 11 FIG. 11 shows a wireless communication system to which the present disclosure can be applied.

[0030] Figure 12 FIG. 12 is a diagram showing a radio protocol architecture for the user plane.

[0031] Figure 13 FIG. 13 is a diagram showing a radio protocol architecture for the control plane.

[0032] Figure 14Illustrates the system structure of a new generation of radio access network (NG-RAN) that applies NR.

[0033] Figure 15 Illustrates the functional division between NG-RAN and 5GC.

[0034] Figure 16 Illustrates an example of the frame structure that can be applied in NR.

[0035] Figure 17 Illustrates the time slot structure of an NR frame.

[0036] Figure 18 Illustrates CORESET.

[0037] Figure 19 Is a diagram that illustrates the difference between a conventional control region and CORESET in NR.

[0038] Figure 20 Illustrates an example of the frame structure for a new radio access technology.

[0039] Figure 21 Illustrates the structure of a self-contained time slot.

[0040] Figure 22 Illustrates physical channel and general signal transmission.

[0041] Figure 23 Illustrates a scenario where three different bandwidth parts are set.

[0042] Figure 24 Is an application example of application delay.

[0043] Figure 25 Illustrates the location of COREST for PDCCH monitoring.

[0044] Figure 26 Illustrates a method for determining an application delay value according to Option 3.

[0045] Figure 27 Is an application Figure 26 Example of the method in.

[0046] Figure 28 Is an application Figure 26 Another example of the method in.

[0047] Figure 29 Illustrates the signaling method between the network (base station) and the UE.

[0048] Figure 30 Illustrates the signaling method between the network (base station) and the UE.

[0049] Figure 31Illustrates a vehicle or autonomous vehicle to which the present disclosure can be applied. Detailed Description

[0050] Figure 1 Illustrates communication system 1 applied to the present specification.

[0051] Referring to Figure 1 , communication system 1 applied to the present specification includes a wireless device, a base station (BS), and a network. Herein, the wireless device refers to a device that performs communication using a radio access technology (RAT) (e.g., 5G new RAT (NR) or Long Term Evolution (LTE)), and may be referred to as a communication / radio / 5G device. The wireless device may include, without limitation, robot 100a, vehicles 100b-1 and 100b-2, extended reality (XR) device 100c, handheld device 100d, home appliance 100e, Internet of Things (IoT) device 100f, and artificial intelligence (AI) device / server 400. For example, the vehicle may include a vehicle having a wireless communication function, an autonomous vehicle, and a vehicle capable of performing vehicle-to-vehicle communication. Herein, the vehicle may include an unmanned aerial vehicle (UAV) (e.g., a drone). The XR device may include an augmented reality (AR) / virtual reality (VR) / mixed reality (MR) device and may be implemented in the form of a head-mounted device (HMD), a head-up display (HUD) installed in a vehicle, a TV, a smartphone, a computer, a wearable device, a home appliance device, a digital sign, a vehicle, a robot, etc. The handheld device may include a smartphone, a smart board, a wearable device (e.g., a smartwatch or smart glasses), and a computer (e.g., a notebook). The home appliance may include a TV, a refrigerator, and a washing machine. The IoT device may include sensors and smart meters. For example, the BS and the network may be implemented as wireless devices, and a specific wireless device 200a may operate as a BS / network node with respect to other wireless devices.

[0052] Wireless devices 100a to 100f can be connected to network 300 via BS200. AI technology can be applied to wireless devices 100a to 100f, and wireless devices 100a to 100f can be connected to AI server 400 via network 300. Network 300 can be configured using a 3G network, a 4G (e.g., LTE) network, or a 5G (e.g., NR) network. Although wireless devices 100a to 100f can communicate with each other via BS200 / network 300, wireless devices 100a to 100f can perform direct communication (e.g., sidelink communication) with each other without going through the BS / network. For example, vehicles 100b-1 and 100b-2 can perform direct communication (e.g., vehicle-to-vehicle (V2V) / vehicle-to-everything (V2X) communication). Additionally, IoT devices (e.g., sensors) can perform direct communication with other IoT devices (e.g., sensors) or other wireless devices 100a to 100f.

[0053] Wireless communication / connections 150a, 150b, or 150c can be established between wireless devices 100a to 100f / BS200 or BS200 / BS200. Herein, the wireless communication / connections can be established through various RATs (e.g., 5G NR) such as uplink / downlink communication 150a, sidelink communication 150b (or D2D communication), or inter-BS communication (e.g., relay, integrated access backhaul (IAB)). The wireless devices and the BS / wireless devices can transmit / receive radio signals to / from each other through wireless communication / connections 150a and 150b. For example, wireless communication / connections 150a and 150b can transmit / receive signals through various physical channels. To this end, based on various proposals of the present disclosure, at least a part of various configuration information configuration processes, various signal processing processes (e.g., channel encoding / decoding, modulation / demodulation, and resource mapping / demapping), and resource allocation processes for transmitting / receiving radio signals can be performed.

[0054] Here, the wireless communication technologies implemented in the wireless devices 100 and 200 of the present specification may include narrowband Internet of Things for low-power communication in addition to LTE, NR, and 6G. At this time, for example, the NB-IoT technology may be an example of LPWAN (Low-Power Wide-Area Network) technology, and it may be implemented in standards such as LTE Cat NB1 and / or LTE Cat NB2, and is not limited to the above names. Additionally or alternatively, the wireless communication technologies implemented in the wireless devices 100 and 200 of the present specification may perform communication based on LTE-M technology. In this case, as an example, the LTE-M technology may be an example of LPWAN technology and may be referred to by various names such as enhanced machine type communication (eMTC). For example, the LTE-M technology may be implemented in at least one of various standards such as 1) LTE CAT 0, 2) LTE Cat M1, 3) LTE Cat M2, 4) LTE non-BL (non-wideband restricted), 5) LTE-MTC, 6) LTE machine type communication, and / or 7) LTE M, and is not limited to the above names. Additionally or alternatively, considering low-power communication, the wireless communication technologies implemented in the wireless devices 100 and 200 of the present specification may include at least one of ZigBee, Bluetooth, and low-power wide-area network (LPWAN), and is not limited to the above names. For example, the ZigBee technology may create a PAN (Personal Area Network) related to small / low-power digital communication based on various standards such as IEEE 802.15.4 and may be referred to by various names.

[0055] Figure 2 Illustrates wireless devices applicable to the present specification.

[0056] Refer to Figure 2 , the first wireless device 100 and the second wireless device 200 may transmit / receive wireless signals through various wireless access technologies (e.g., LTE, NR).

[0057] The first wireless device 100 includes at least one processor 102 and at least one memory 104, and may further include at least one transceiver 106 and / or at least one antenna 108. The processor 102 may be configured to control the memory 104 and / or the transceiver 106, and implement the descriptions, functions, processes, proposals, methods, and / or operation flowcharts disclosed herein. For example, the processor 102 may process the information in the memory 104 to generate first information / signals, and then may transmit radio signals including the first information / signals through the transceiver 106. Additionally, the processor 102 may receive radio signals including second information / signals through the transceiver 106, and may store the information obtained from signal processing of the second information / signals in the memory 104. The memory 104 may be connected to the processor 102, and may store various pieces of information related to the operation of the processor 102. For example, the memory 104 may store software code, which includes instructions for performing part or all of the processes controlled by the processor 102 or for performing the descriptions, functions, processes, proposals, methods, and / or operation flowcharts disclosed herein. Here, the processor 102 and the memory 104 may be part of a communication modem / circuit / chip designed to implement radio communication technologies (such as LTE or NR). The transceiver 106 may be connected to the processor 102, and may transmit and / or receive radio signals via at least one antenna 108. The transceiver 106 may include a transmitter and / or a receiver. The transceiver 106 may be replaced by a radio frequency (RF) unit. In this specification, a wireless device may refer to a communication modem / circuit / chip.

[0058] The second wireless device 200 includes at least one processor 202 and at least one memory 204, and may further include at least one transceiver 206 and / or at least one antenna 208. The processor 202 may be configured to control the memory 204 and / or the transceiver 206, and implement the descriptions, functions, processes, proposals, methods, and / or operation flowcharts disclosed herein. For example, the processor 202 may process the information in the memory 204 to generate third information / signals, and then may transmit radio signals including the third information / signals via the transceiver 206. Additionally, the processor 202 may receive radio signals including fourth information / signals via the transceiver 206, and may store the information obtained from signal processing of the fourth information / signals in the memory 204. The memory 204 may be connected to the processor 202 and may store various pieces of information related to the operation of the processor 202. For example, the memory 204 may store software code including instructions for performing part or all of the processes controlled by the processor 202 or for performing the descriptions, functions, processes, proposals, methods, and / or operation flowcharts disclosed herein. Here, the processor 202 and the memory 204 may be part of a communication modem / circuit / chip designed to implement radio communication technologies (e.g., LTE or NR). The transceiver 206 may be connected to the processor 202 and may transmit and / or receive radio signals via at least one antenna 208. The transceiver 206 may include a transmitter and / or a receiver. The transceiver 206 may be replaced by an RF unit. In this specification, a wireless device may refer to a communication modem / circuit / chip.

[0059] In the following, the hardware components of wireless devices 100 and 200 are described in detail. At least one protocol layer can be, but is not limited to, implemented by at least one processor 102 and 202. For example, at least one processor 102 and 202 can implement at least one layer (e.g., functional layers such as PHY, MAC, RLC, PDCP, RRC, and SDAP layers). The at least one processor 102 and 202 can generate at least one protocol data unit (PDU) and / or at least one service data unit (SDU) according to the descriptions, functions, processes, proposals, methods, and / or operation flowcharts disclosed herein. The at least one processor 102 and 202 can generate messages, control information, data, or information according to the descriptions, functions, processes, proposals, methods, and / or operation flowcharts disclosed herein. The at least one processor 102 and 202 can generate signals (e.g., baseband signals) including PDU, SDU, messages, control information, data, or information according to the functions, processes, proposals, and / or methods disclosed herein, and can provide the signals to at least one transceiver 106 and 206. The at least one processor 102 and 202 can receive signals (e.g., baseband signals) from at least one transceiver 106 and 206, and can obtain PDU, SDU, messages, control information, data, or information according to the descriptions, functions, processes, proposals, methods, and / or operation flowcharts disclosed herein.

[0060] The at least one processor 102 and 202 can be referred to as a controller, microcontroller, microprocessor, or microcomputer. The at least one processor 102 and 202 can be implemented by hardware, firmware, software, or a combination thereof. For example, at least one application specific integrated circuit (ASIC), at least one digital signal processor (DSP), at least one digital signal processor device (DSPD), at least one programmable logic device (PLD), or at least one field programmable gate array (FPGA) can be included in the at least one processor 102 and 202. One or more processors 102 and 202 can be implemented as including at least one computer readable medium (CRM) based on instructions executed by at least one processor.

[0061] For example, Figures 26 to 30Each method described herein may be performed by at least one computer-readable medium (CRM) including instructions executed by at least one processor. For example, the CRM may access a base station through a random access procedure. Thereafter, the CRM may perform receiving downlink control information (DCI) including information indicating a change in the value of K0min or K2min (each of K0min and K2min is the minimum scheduling offset limit applied) in time slot n of a scheduled cell, and applying the changed K0min or the changed K2min value in time slot n+X of the scheduled cell. The value of X is i) the first value obtained by multiplying the currently applied K0min (Y) in the scheduled cell scheduled by the DCI by 2 μscheduling / 2 μscheduled and then performing ceiling operation, and ii) the maximum value among the second value (Z) predetermined according to the subcarrier spacing (SCS) of the scheduled cell. μscheduling is the subcarrier spacing configuration of the scheduled cell, and μscheduled is the subcarrier spacing configuration of the scheduled cell being scheduled.

[0062] The descriptions, functions, procedures, proposals, methods, and / or operation flowcharts disclosed herein may be implemented using firmware or software, and the firmware or software may be configured to include modules, procedures, functions, etc. The firmware or software configured to perform the descriptions, functions, procedures, proposals, methods, and / or operation flowcharts disclosed herein may be included in at least one of processors 102 and 202, or may be stored in at least one of memories 104 and 204 and may be executed by at least one of processors 102 and 202. The descriptions, functions, procedures, proposals, methods, and / or operation flowcharts disclosed herein may be implemented using firmware or software in the form of code, instructions, and / or instruction sets.

[0063] At least one of memories 104 and 204 may be connected to at least one of processors 102 and 202 and may store various forms of data, signals, messages, information, programs, code, instructions, and / or commands. At least one of memories 104 and 204 may be configured as ROM, RAM, EPROM, flash memory, hard disk drive, register, cache, computer-readable storage medium, and / or a combination thereof. At least one of memories 104 and 204 may be provided inside and / or outside at least one of processors 102 and 202. Additionally, at least one of memories 104 and 204 may be connected to at least one of processors 102 and 202 through various techniques such as wired or wireless connections.

[0064] At least one transceiver 106, 206 may send user data, control information, radio signals / channels, etc. mentioned in the methods and / or operation flowcharts disclosed herein to at least different devices. At least one transceiver 106 and 206 may receive user data, control information, radio signals / channels, etc. mentioned in the descriptions, functions, processes, proposals, methods, and / or operation flowcharts disclosed herein from at least one different device. For example, at least one transceiver 106 and 206 may be connected to at least one processor 102 and 202 and may send and receive radio signals. For example, at least one processor 102 and 202 may control at least one transceiver 106 and 206 to send user data, control information, or radio signals to at least one different device. Additionally, at least one processor 102 and 202 may control at least one transceiver 106 and 206 to receive user data, control information, or radio signals from at least one different device. At least one transceiver 106 and 206 may be connected to at least one antenna 108 and 208 and may be configured to send or receive user data, control information, radio signals / channels, etc. mentioned in the descriptions, functions, processes, proposals, methods, and / or operation flowcharts disclosed herein through at least one antenna 108 and 208. In this document, at least one antenna may be multiple physical antennas or may be multiple logical antennas (e.g., antenna ports). At least one transceiver 106 and 206 may transform the received radio signal / channel from an RF band signal into a baseband signal for processing the received user data, control information, radio signal / channel, etc. using at least one processor 102 and 202. At least one transceiver 106 and 206 may transform the user data, control information, radio signal / channel, etc. processed using at least one processor 102 and 202 from a baseband signal into an RF band signal. To this end, at least one transceiver 106 and 206 may include an (analog) oscillator and / or a filter.

[0065] Figure 3 An example of the structure of a signal processing module is shown. Here, signal processing may be performed by Figure 2 processors 102 and 202.

[0066] Referring to Figure 3 , a transmitting device in a UE or a BS (e.g., a processor, a processor and a memory, or a processor and a transceiver) may include a scrambler 301, a modulator 302, a layer mapper 303, an antenna port mapper 304, a resource block mapper 305, and a signal generator 306.

[0067] The transmitting device can transmit one or more codewords. The coded bits in each codeword are scrambled by a corresponding scrambler 301 and transmitted on a physical channel. A codeword can be referred to as a data string and can be equivalent to a transport block which is a data block provided by the MAC layer.

[0068] The scrambled bits are modulated into complex-valued modulation symbols by a corresponding modulator 302. The modulator 302 can modulate the scrambled bits according to a modulation scheme to arrange complex-valued modulation symbols representing positions on a signal constellation diagram. The modulation scheme is not limited, and m-PSK (m-phase shift keying) or m-QAM (m-quadrature amplitude modulation) can be used to modulate the coded data. The modulator can be referred to as a modulation mapper.

[0069] The complex-valued modulation symbols can be mapped to one or more transmission layers by a layer mapper 303. The complex-valued modulation symbols on each layer can be mapped by an antenna port mapper 304 for transmission on an antenna port.

[0070] Each resource block mapper 305 can map the complex-valued modulation symbols regarding each antenna port to appropriate resource elements in the virtual resource blocks allocated for transmission. The resource block mapper can map the virtual resource blocks to physical resource blocks according to an appropriate mapping scheme. The resource block mapper 305 can allocate the complex-valued modulation symbols regarding each antenna port to appropriate subcarriers and multiplex the complex-valued modulation symbols according to users.

[0071] The signal generator 306 can modulate the complex-valued modulation symbols regarding each antenna port (i.e., antenna-specific symbols) according to a specific modulation scheme (e.g., OFDM (orthogonal frequency division multiplexing)) to generate a complex-valued time-domain OFDM symbol signal. The signal generator can perform IFFT (inverse fast Fourier transform) on the antenna-specific symbols and can insert a CP (cyclic prefix) into the time-domain symbols on which IFFT has been performed. The OFDM symbols undergo digital-to-analog conversion and upconversion and are then transmitted to the receiving device through each transmitting antenna. The signal generator can include an IFFT module, a CP insertion unit, a digital-to-analog converter (DAC), and an upconverter.

[0072] Figure 4 Another example of the structure of the signal processing module in the transmitting device is shown. Here, signal processing can be performed in the processors of the UE / BS such as Figure 2 processors 102 and 202.

[0073] Referring to Figure 4 , the transmitting device (e.g., a processor, a processor and a memory, or a processor and a transceiver) in the UE or BS can include a scrambler 401, a modulator 402, a layer mapper 403, a precoder 404, a resource block mapper 405, and a signal generator 406.

[0074] The transmitting device can scramble the coded bits in the codeword through the corresponding scrambler 401, and then transmit the scrambled coded bits through the physical channel.

[0075] The scrambled bits are modulated into complex-valued modulation symbols through the corresponding modulator 402. The modulator can modulate the scrambled bits according to a predetermined modulation scheme to arrange complex-valued modulation symbols representing positions on the signal constellation diagram. The modulation scheme is not limited, and π / 2-BPSK (π / 2 binary phase shift keying), m-PSK (m-phase shift keying), or m-QAM (m-quadrature amplitude modulation) can be used to modulate the coded data.

[0076] The complex-valued modulation symbols can be mapped to one or more transmission layers by the layer mapper 403.

[0077] The complex-valued modulation symbols on each layer can be precoded by the precoder 404 for transmission on the antenna ports. Here, the precoder can perform transform precoding on the complex-valued modulation symbols and then perform precoding. Alternatively, the precoder can perform precoding without performing transform precoding. The precoder 404 can process the complex-valued modulation symbols according to MIMO using multiple transmit antennas to output antenna-specific symbols, and distribute the antenna-specific symbols to the corresponding resource block mapper 405. The output z of the precoder 404 can be obtained by multiplying the output y of the layer mapper 403 by the N×M precoding matrix W. Here, N is the number of antenna ports and M is the number of layers.

[0078] Each resource block mapper 405 maps the complex-valued modulation symbols regarding each antenna port to appropriate resource elements in the virtual resource blocks allocated for transmission.

[0079] The resource block mapper 405 can assign the complex-valued modulation symbols to appropriate subcarriers and multiplex the complex-valued modulation symbols according to users.

[0080] The signal generator 406 can modulate the complex-valued modulation symbols according to a specific modulation scheme (e.g., OFDM) to generate a complex-valued time-domain OFDM symbol signal. The signal generator 406 can perform IFFT (inverse fast Fourier transform) on the antenna-specific symbols and can insert CP (cyclic prefix) into the time-domain symbols on which IFFT has been performed. The OFDM symbols undergo digital-to-analog conversion and upconversion, and then are transmitted to the receiving device through each transmit antenna. The signal generator 406 can include an IFFT module, a CP insertion unit, a digital-to-analog converter (DAC), and an upconverter.

[0081] The signal processing process of the receiving device can be the reverse process of the signal processing process of the transmitting device. Specifically, the processor of the transmitting device decodes and demodulates the RF signal received through the antenna port of the transceiver. The receiving device may include multiple receiving antennas, and the signals received through the receiving antennas are restored to baseband signals, and then multiplexed and demodulated according to MIMO to be restored to the data string intended to be transmitted by the transmitting device. The receiving device may include: a signal restoration unit that restores the received signal to a baseband signal; a multiplexer that combines and multiplexes the received signals; and a channel demodulator that demodulates the multiplexed signal string into corresponding codewords. The signal restoration unit, the multiplexer, and the channel demodulator may be configured as integrated modules or independent modules for performing their functions. More specifically, the signal restoration unit may include: an analog-to-digital converter (ADC) that converts an analog signal into a digital signal; a CP removal unit that removes CP from the digital signal; an FET module that applies FFT (Fast Fourier Transform) to the signal from which CP has been removed to output a frequency-domain signal; and a resource element demapper / equalizer that restores the frequency-domain symbols to antenna-specific symbols. The antenna-specific symbols are restored to the transport layer by the multiplexer, and the transport layer is restored to the codewords intended to be transmitted by the transmitting device by the channel demodulator.

[0082] Figure 5 An example of a wireless communication device according to an implementation example of the present disclosure is illustrated.

[0083] Referring to Figure 5 , a wireless communication device (e.g., a UE) may include at least one of a processor 2310 such as a digital signal processor (DSP) or a microprocessor, a transceiver 2335, a power management module 2305, an antenna 2340, a battery 2355, a display 2315, a keyboard 2320, a global positioning system (GPS) chip 2360, a sensor 2365, a memory 2330, a subscriber identity module (SIM) card 2325, a speaker 2345, and a microphone 2350. Multiple antennas and multiple processors may be provided.

[0084] The processor 2310 may implement the functions, processes, and methods described in this specification. Figure 5 The processor 2310 in Figure 2 may be the processors 102 and 202 in

[0085] The memory 2330 is connected to the processor 2310 and stores information related to the operation of the processor. The memory may be located inside or outside the processor and is connected to the processor through various technologies such as wired connections and wireless connections. Figure 5The memory 2330 in Figure 2 can be the memories 104 and 204 in

[0086] The user can input various types of information such as a phone number using various techniques such as pressing a button on the keyboard 2320 or initiating a sound using the microphone 2350. The processor 2310 can receive and process the user information and perform appropriate functions such as making a call using the input phone number. In some scenarios, data can be retrieved from the SIM card 2325 or the memory 2330 to perform appropriate functions. In some scenarios, the processor 2310 can display various types of information and data on the display 2315 to facilitate the user.

[0087] The transceiver 2335 is connected to the processor 2310 and transmits and / or receives RF signals. The processor can control the transceiver to initiate communication or transmit RF signals including various types of information or data such as voice communication data. The transceiver includes a transmitter and a receiver for transmitting and receiving RF signals. The antenna 2340 can facilitate the transmission and reception of RF signals. In some example implementations, when the transceiver receives an RF signal, the transceiver can forward the signal and convert it to a baseband frequency for processing by the processor. The signal can be processed by various techniques such as converting it to audible or readable information for output through the speaker 2345. Figure 5 The transceiver in Figure 2 can be the transceivers 106 and 206 in

[0088] Although not shown in Figure 5 , various components such as a camera and a Universal Serial Bus (USB) port can be additionally included in the UE. For example, the camera can be connected to the processor 2310.

[0089] Figure 5 is an example of an implementation of the UE, and the example implementations of the present disclosure are not limited thereto. The UE does not necessarily need to include Figure 5 all the components shown in

[0090] Figure 6 . That is, some of the components (e.g., the keyboard 2320, the GPS chip 2360, the sensor 2365, and the SIM card 2325) may not be necessary components. In this case, they may not be included in the UE.

[0090] Figure 6 shows an example of the processor 2000.

[0091] Referring to Figure 6 , the processor 2000 can include a control channel monitoring unit 2010 and a data channel receiving unit 2020. The processor 2000 can perform reference Figures 26 to 30The described method (location of the receiver, e.g., location of the UE). For example, the processor 2000 can access the base station through a random access procedure. Thereafter, the processor 2000 receives downlink control information (DCI) in time slot n of the scheduling cell, which includes information notifying a change in the value of K0min or K2min, where each of K0min and K2min is the minimum scheduling offset limit applied. Additionally, the processor 2000 applies the changed value of K0min or the changed value of K2min in time slot n+X of the scheduling cell. The value of X is i) the first value obtained by multiplying the currently applied K0min (Y) in the scheduled cell scheduled by the DCI by 2 μscheduling / 2 μscheduled and then performing ceiling operation, and ii) the maximum value among the second value (Z) pre-determined according to the subcarrier spacing (SCS) of the scheduling cell. μscheduling is the subcarrier spacing configuration of the scheduling cell, and μscheduled is the subcarrier spacing configuration of the scheduled cell. The processor 2000 can be an example of the processors 102 and 202 Figure 2 as shown.

[0092] Figure 7 An example of the processor 3000 is shown.

[0093] Referring to Figure 7 , the processor 3000 can include a control information / data generation module 3010 and a transmission module 3020. The processor 3000 can perform the method described from the perspective of the transmitter in Figures 26 to 30 . For example, the processor 3000 can access a specific UE through a random access procedure. Thereafter, the processor 3000 can send a higher layer signal to the UE for setting the value of K0min or K2min. And the processor 3000 sends downlink control information (DCI) including information notifying a change in the value of K0min or K2min to the UE in time slot n of the scheduling cell, where each of K0min and K2min is the minimum scheduling offset limit applied. The processor 3000 can assume that the changed value of K0min or the changed value of K2min is applied in time slot n+X of the scheduling cell. The value of X is i) the first value obtained by multiplying the currently applied K0min (Y) in the scheduled cell scheduled by the DCI by 2 μscheduling / 2 μscheduled and then performing ceiling operation, and ii) the maximum value among the second value (Z) pre-determined according to the subcarrier spacing (SCS) of the scheduling cell. μscheduling is the subcarrier spacing configuration of the scheduling cell, and μscheduled is the subcarrier spacing configuration of the scheduled cell. The processor 3000 can be an example of the processors 102 and 202 Figure 2 as shown.

[0094] Figure 8 Another example of a wireless device is shown.

[0095] According to Figure 8 , the wireless device may include at least one processor 102, 202, at least one memory 104, 204, at least one transceiver 106, 206, and one or more antennas 108, 208.

[0096] Figure 8 The example of the wireless device described in Figure 2 differs from the example of the wireless device described in Figure 2 in that the processors 102 and 202 and the memories 104 and 204 are separate in Figure 8 , while in the example of

[0097] Figure 9 the memories 104 and 204 are included in the processors 102 and 202. That is, the processor and the memory may form a chipset.

[0098] Referring to Figure 9 , the wireless devices 100 and 200 may correspond to the wireless device of Figure 2 and may be configured by various elements, components, units / parts, and / or modules. For example, each of the wireless devices 100 and 200 may include a communication unit 110, a control unit 120, a storage unit / memory 130, and additional components 140. The communication unit may include a communication circuit 112 and a transceiver 114. For example, the communication circuit 112 may include one or more processors 102 and 202 and / or one or more memories 104 and 204. For example, the transceiver 114 may include Figure 2 one or more transceivers 106 and 206 and / or one or more antennas 108 and 208 of

[0099] The additional component 140 can be configured in various ways according to the type of the wireless device. For example, the additional component 140 can include at least one of a power unit / battery, an input / output (I / O) unit, a drive unit, and a computing unit. The wireless device can be implemented in forms including but not limited to the following: a robot ( Figure 1 100a), a vehicle ( Figure 1 100b-1 and 100b-2), an XR device ( Figure 1 100c), a handheld device ( Figure 1 100d), a household appliance ( Figure 1 100e), an IoT device ( Figure 1 100f), a digital broadcast UE, a holographic device, a public safety device, an MTC device, a medical device, a fintech device (or financial device), a security device, a climate / environment device, an AI server / device ( Figure 1 400), a BS ( Figure 1 200), a network node, etc. According to the use case / service, the wireless device can be used in a mobile or fixed location.

[0100] In Figure 9 , all kinds of elements, components, units / parts, and / or modules in the wireless devices 100 and 200 can be connected to each other through a wired interface, or at least a part of them can be wirelessly connected through the communication unit 110. For example, in each of the wireless devices 100 and 200, the control unit 120 and the communication unit 110 can be connected by wire, and the control unit 120 and the first unit (e.g., 130 and 140) can be wirelessly connected through the communication unit 110. Additionally, each element, component, unit / part, and / or module within the wireless devices 100 and 200 can further include one or more elements. For example, the control unit 120 can be configured by a set of one or more processors. For example, the control unit 120 can be configured by a set of a communication control processor, an application processor, an electronic control unit (ECU), a graphics processing unit, and a memory control processor. For another example, the memory 130 can be configured by a random access memory (RAM), a dynamic RAM (DRAM), a read-only memory (ROM), a flash memory, a volatile memory, a non-volatile memory, and / or a combination thereof.

[0101] Figure 10 Illustrates a handheld device applied to this specification. The handheld device can include a smart phone, a smart board, a wearable device (e.g., a smart watch or smart glasses), or a portable computer (e.g., a notebook). The handheld device can be referred to as a mobile station (MS), a user terminal (UT), a mobile subscriber station (MSS), a subscriber station (SS), an advanced mobile station (AMS), or a wireless terminal (WT).

[0102] Reference Figure 10 , the handheld device 100 may include an antenna unit / antenna 108, a communication unit 110, a control unit 120, a storage unit 130, a power supply unit 140a, an interface unit 140b, and an I / O unit 140c. The antenna unit 108 may be configured as part of the communication unit 110. Blocks 110 to 130 / 140a to 140c respectively correspond to Figure 9 blocks 110 to 130 / 140 of

[0103] The communication unit 110 may transmit and receive signals (e.g., data and control signals) with other wireless devices or a BS. The control unit 120 may perform various operations by controlling the components of the handheld device 100. The control unit 120 may include an application processor (AP). The storage unit 130 may store data / parameters / programs / codes / commands required to drive the handheld device 100. Additionally, the storage unit 130 may store input / output data / information. The power supply unit 140a may supply power to the handheld device 100 and includes a wired / wireless charging circuit, a battery, etc. The interface unit 140b may support the connection of the handheld device 100 with other external devices. The interface unit 140b may include various ports for connecting to external devices (e.g., audio I / O ports and video I / O ports). The I / O unit 140c may input or output video information / signals, audio information / signals, data, and / or information input by a user. The I / O unit 140c may include a camera, a microphone, a user input unit, a display unit 140d, a speaker, and / or a haptic module.

[0104] For example, in the case of data communication, the I / O unit 140c may acquire information / signals (e.g., touch, text, voice, image, or video) input by a user, and the acquired information / signals may be stored in the storage unit 130. The communication unit 110 may transform the information / signals stored in the memory into a radio signal and directly transmit the transformed radio signal to other wireless devices or a BS. Additionally, the communication unit 110 may receive a radio signal from other wireless devices or a BS and then restore the received radio signal to the original information / signals. The restored information / signals may be stored in the storage unit 130 and may be output through the I / O unit 140c in various types (e.g., text, voice, image, video, or haptic).

[0105] Figure 11 A wireless communication system to which the present disclosure may be applied is shown. This wireless communication system may be referred to as an evolved UMTS terrestrial radio access network (E-UTRAN) or a Long Term Evolution (LTE) / LTE-A system.

[0106] The E-UTRAN includes at least one base station (BS) 20 that provides a control plane and a user plane to a user equipment (UE) 10. The UE 10 can be fixed or mobile and can be referred to by another term such as a mobile station (MS), user terminal (UT), subscriber station (SS), mobile terminal (MT), wireless device, terminal, etc. The BS 20 is typically a fixed station that communicates with the UE 10 and can be referred to by another term such as an evolved Node B (eNB), base transceiver system (BTS), access point, gNB, etc.

[0107] The BSs 20 are interconnected via an X2 interface. The BSs 20 are also connected to an evolved packet core (EPC) 30 via an S1 interface, more specifically, connected to a mobility management entity (MME) via an S1-MME and connected to a serving gateway (S-GW) via an S1-U.

[0108] The EPC 30 includes an MME, an S-GW, and a packet data network gateway (P-GW). The MME has access information of the UE or capability information of the UE, which is typically used for mobility management of the UE. The S-GW is a gateway with the E-UTRAN as an endpoint. The P-GW is a gateway with a PDN as an endpoint.

[0109] The layers of the radio interface protocol between the UE and the network can be divided into a first layer (L1), a second layer (L2), and a third layer (L3) based on the lower three layers of the well-known open systems interconnection (OSI) model in a communication system. Among them, the physical (PHY) layer belonging to the first layer provides an information transfer service using a physical channel, and the radio resource control (RRC) layer belonging to the third layer is used to control radio resources between the UE and the network. To this end, the RRC layer exchanges RRC messages between the UE and the BS.

[0110] Figure 12 is a diagram showing the radio protocol architecture for the user plane. Figure 13 is a diagram showing the radio protocol architecture for the control plane. The user plane is a protocol stack for user data transmission. The control plane is a protocol stack for control signal transmission.

[0111] Referring to Figure 12 and Figure 13 , the PHY layer provides an information transfer service to the upper layer through a physical channel. The PHY layer is connected to a media access control (MAC) layer, which is the upper layer of the PHY layer, via a transport channel. Data is transferred between the MAC layer and the PHY layer through the transport channel. The transport channel is classified according to how data is transferred through the radio interface and what characteristics of data are transferred.

[0112] Data moves between different PHY layers (i.e., the PHY layer of the transmitter and the PHY layer of the receiver) via a physical channel. The physical channel can be modulated according to an Orthogonal Frequency Division Multiplexing (OFDM) scheme and uses time and frequency as radio resources.

[0113] The functions of the MAC layer include the mapping between logical channels and transport channels and the multiplexing and demultiplexing into transport blocks provided on the transport channels for the MAC service data units (SDUs) belonging to the logical channels. The MAC layer provides services to the Radio Link Control (RLC) layer via logical channels.

[0114] The functions of the RLC layer include the concatenation, segmentation, and reassembly of RLC SDUs. To ensure various types of Quality of Service (QoS) required for radio bearers (RBs), the RLC layer provides three types of operation modes: transparent mode (TM), unacknowledged mode (UM), and acknowledged mode (AM). AM RLC provides error correction via Automatic Repeat reQuest (ARQ).

[0115] The RRC layer is only defined on the control plane. The RRC layer is associated with the configuration, reconfiguration, and release of radio bearers and is responsible for the control of logical channels, transport channels, and PHY channels. An RB represents the logical route provided by the first layer (PHY layer) and the second layer (MAC layer, RLC layer, and PDCP layer) for transmitting data between the UE and the network.

[0116] The functions of the Packet Data Convergence Protocol (PDCP) layer on the user plane include the transfer of user data and header compression and encryption. The functions of the PDCP layer on the user plane also include the transfer and encryption / integrity protection of control plane data.

[0117] The configuration of an RB means the process of defining the characteristics of radio protocol layers and channels to provide a specific service and configuring various detailed parameters and operation methods. RBs can be classified into two types: signaling RBs (SRBs) and data RBs (DRBs). SRBs are used as the channels through which RRC messages are sent on the control plane, and DRBs are used as the channels through which user data is sent on the user plane.

[0118] If an RRC connection is established between the RRC layer of the UE and the RRC layer of the E-UTRAN, the UE is in the RRC connected state. Otherwise, the UE is in the RRC idle state.

[0119] The downlink transport channels for sending data from the network to the UE include the broadcast channel (BCH) for sending system information and the downlink shared channel (SCH) for sending user traffic or control messages. The traffic or control messages for downlink multicast or broadcast services can be sent through the downlink SCH, or can be sent through an additional downlink multicast channel (MCH). In addition, the uplink transport channels for sending data from the UE to the network include the random access channel (RACH) for sending initial control messages and the uplink shared channel (SCH) for sending user traffic or control messages.

[0120] The logical channels located above the transport channels and mapped to the transport channels include the broadcast control channel (BCCH), the paging control channel (PCCH), the common control channel (CCCH), the multicast control channel (MCCH), and the multicast traffic channel (MTCH).

[0121] The physical channels include multiple OFDM symbols in the time domain and multiple subcarriers in the frequency domain. One subframe includes multiple OFDM symbols in the time domain. An RB is a resource allocation unit, including multiple OFDM symbols and multiple subcarriers. In addition, each subframe can use specific subcarriers of a specific OFDM symbol (e.g., the first OFDM symbol) of the corresponding subframe for the physical downlink control channel (PDCCH), i.e., the L1 / L2 control channel. The transmission time interval (TTI) is the unit time for subframe transmission.

[0122] Hereinafter, the new radio access technology (new RAT) or new radio (NR) will be described.

[0123] As more and more communication devices require more communication capacity, mobile broadband communication improved from existing radio access technologies is needed. In addition, massive machine type communication (MTC) that provides various services by connecting many devices and objects is one of the main issues to be considered in next-generation communication. In addition, the design of a communication system considering reliability / latency-sensitive services / UEs is being discussed. The introduction of next-generation radio access technologies considering enhanced mobile broadband communication (eMBB), massive MTC (mMTC), and ultra-reliable low-latency communication (URLLC) has been discussed. In this disclosure, for convenience, this new technology can be referred to as the new radio access technology (new RAT or NR).

[0124] Figure 14 The system structure of the next-generation radio access network (NG-RAN) applying NR is illustrated.

[0125] Referring to Figure 14 , the NG-RAN can include a gNB and / or an eNB that provide user plane and control plane protocol termination to the UE. Figure 14The example illustrates the case where only gNB is involved, and the gNB and eNB are connected via the Xn interface. The gNB and eNB are connected to the 5G Core Network (5GC) via the NG interface. More specifically, the gNB and eNB are connected to the Access and Mobility Management Function (AMF) via the NG-C interface, and are connected to the User Plane Function (UPF) via the NG-U interface.

[0126] Figure 15 The functional division between the NG-RAN and the 5GC is illustrated.

[0127] Refer to Figure 15 , the gNB can provide functions such as inter-cell radio resource management (inter-cell RRM), radio bearer management (RB control), connection mobility control, radio access control, measurement configuration and regulation, dynamic resource allocation, etc. The AMF can provide functions such as NAS security, idle state mobility handling, etc. The UPF can provide functions such as mobility anchoring, PDU processing, etc. The SMF can provide functions such as UE IP address assignment, PDU session control, etc.

[0128] Figure 16 An example of the frame structure that can be applied in NR is illustrated.

[0129] Refer to Figure 16 , the radio frame (which can be referred to as a frame hereinafter) can be used for uplink and downlink transmissions in NR. The frame has a length of 10 ms and can be defined as two 5-ms half-frames (HF). A half-frame can be defined as five 1-ms subframes (SF). A subframe can be divided into one or more time slots, and the number of time slots in a subframe depends on the subcarrier spacing (SCS). Each time slot includes 12 or 14 OFDM(A) symbols according to the cyclic prefix (CP). When using normal CP, each time slot includes 14 symbols. When using extended CP, each time slot includes 12 symbols. Here, the symbol can include an OFDM symbol (or CP-OFDM symbol) and an SC-FDMA symbol (or DFT-s-OFDM symbol).

[0130] Table 1 below illustrates the subcarrier spacing configuration μ.

[0131] [Table 1]

[0132]

[0133] Table 2 below illustrates the number of time slots (N frame,μ slot ) in a frame, the number of time slots (N subframe,μ slot) The number of symbols (N) in a time slot slot symb ) etc.

[0134] [Table 2]

[0135]

[0136] In Figure 16 , μ = 0, 1, 2, and 3 are exemplified.

[0137] Table 2-1 below exemplifies that when using the extended CP, the number of symbols per time slot, the number of time slots per frame, and the number of time slots per subframe vary according to the SCS (μ = 2, 60 kHz).

[0138] [Table 2-1]

[0139] μ <![CDATA[N slot symb > <![CDATA[N frame,u slot > <![CDATA[N subframe,u slot > 2 12 40 4

[0140] In the NR system, the OFDM(A) parameter set (e.g., SCS, CP length, etc.) can be configured differently between multiple cells merged to one UE. Therefore, the (absolute time) duration of a time resource (e.g., SF, time slot, or TTI) (collectively referred to as time unit (TU) for simplicity) composed of the same number of symbols can be configured differently between the merged cells.

[0141] Figure 17 The time slot structure of the NR frame is exemplified.

[0142] A time slot can include multiple symbols in the time domain. For example, in the case of the normal CP, one time slot can include 7 symbols. For example, in the case of the extended CP, one time slot can include 6 symbols. A carrier can include multiple subcarriers in the frequency domain. A resource block (RB) can be defined as multiple (e.g., 12) consecutive subcarriers in the frequency domain. A bandwidth part (BWP) can be defined as multiple consecutive (P) RBs in the frequency domain and can correspond to a parameter set (e.g., SCS, CP length, etc.). A carrier can include up to N (e.g., 5) BWPs. Data communication is performed through the activated BWP, and only one BWP can be activated for one UE. Each element in the resource grid is called a resource element (RE), and one complex symbol can be mapped to the RE.

[0143] The physical downlink control channel (PDCCH) can include one or more control channel elements (CCEs), as exemplified in Table 3 below.

[0144] [Table 3]

[0145] Aggregation level Number of CCEs 1 1 2 2 4 4 8 8 16 16

[0146] That is, the PDCCH can be transmitted through a resource including 1, 2, 4, 8, or 16 CCEs. Here, a CCE includes six resource element groups (REGs), and one REG includes one resource block in the frequency domain and one orthogonal frequency division multiplexing (OFDM) symbol in the time domain.

[0147] Monitoring means decoding each PDCCH candidate according to the downlink control information (DCI) format. The UE monitors a set of PDCCH candidates in one or more CORESETs (described below) on the activated DL BWP of each activated serving cell configured with PDCCH monitoring according to the corresponding search space set.

[0148] In NR, a new unit called a control resource set (CORESET) can be introduced. The UE can receive the PDCCH in the CORESET.

[0149] Figure 18 The CORESET is illustrated.

[0150] Refer to Figure 18 , the CORESET includes N CORESET RB resource blocks in the frequency domain and N CORESET symb ∈ {1, 2, 3} symbols in the time domain. N CORESET RB and N CORESET symb can be provided by the base station via higher layer signaling. As Figure 18 illustrated in, multiple CCEs (or REGs) can be included in the CORESET. One CCE can be composed of multiple resource element groups (REGs), and one REG can include one OFDM symbol in the time domain and 12 resource elements in the frequency domain.

[0151] The UE can attempt to detect the PDCCH in the CORESET in units of 1, 2, 4, 8, or 16 CCEs. One or more CCEs for which PDCCH detection can be attempted can be called PDCCH candidates.

[0152] Multiple CORESETs can be configured for the UE.

[0153] Figure 19 is a diagram illustrating the difference between the conventional control region and the CORESET in NR.

[0154] Refer to Figure 19, a control region 800 in a conventional wireless communication system (e.g., LTE / LTE-A) is configured on the entire system bandwidth used by a base station (BS). All UEs except for some UEs that only support narrowband (e.g., eMTC / NB-IoT UEs) must be able to receive wireless signals on the entire system bandwidth of the BS in order to properly receive / decode the control information sent by the BS.

[0155] On the other hand, in NR, the above-mentioned CORESET is introduced. CORESETs 801, 802, and 803 are radio resources for the control information received by UEs and can use only a part in the frequency domain rather than the entire system bandwidth. Additionally, in the time domain, only some symbols in a time slot can be used. The BS can allocate CORESETs to each UE and send control information through the allocated CORESETs. For example, in Figure 19 , the first CORESET 801 can be allocated to UE 1, the second CORESET 802 can be allocated to UE 2, and the third CORESET 803 can be allocated to UE 3. In NR, UEs can receive control information from the BS without having to receive the entire system bandwidth.

[0156] A CORESET can include a UE-specific CORESET for sending UE-specific control information and a common CORESET for sending control information common to all UEs.

[0157] Furthermore, depending on the application, NR may require high reliability. In such a case, compared with traditional technologies, the target block error rate (BLER) of downlink control information (DCI) sent through a downlink control channel (e.g., Physical Downlink Control Channel (PDCCH)) can be significantly reduced. As an example of a method to meet the requirement of high reliability, the content included in the DCI can be reduced and / or the amount of resources used for DCI transmission can be increased. Here, the resources can include at least one of resources in the time domain, resources in the frequency domain, resources in the code domain, and resources in the space domain.

[0158] In NR, the following technologies / features can be applied.

[0159] <Self-contained subframe structure>

[0160] Figure 20 An example of a frame structure for a new radio access technology is illustrated.

[0161] In NR, as Figure 20 shown, a structure in which a control channel and a data channel are time-division multiplexed within one TTI can be regarded as a frame structure in order to minimize the latency.

[0162] In Figure 20 , the shaded area represents the downlink control area, and the black area represents the uplink control area. The remaining area can be used for downlink (DL) data transmission or uplink (UL) data transmission. This structure is characterized in that DL transmission and UL transmission are sequentially performed within one subframe, so that DL data can be transmitted within the subframe and UL ACK / NACK can also be received. As a result, the time required from the occurrence of a data transmission error to data retransmission is reduced, thereby minimizing the waiting time for the final data transmission.

[0163] In the subframe structure of data and control TDM, a time gap may be required for the base station and the terminal to switch from the transmission mode to the reception mode or from the reception mode to the transmission mode. For this purpose, some OFDM symbols when switching from DL to UL can be set as the guard period (GP) in the self - contained subframe structure.

[0164] Figure 21 Illustrates the structure of a self - contained time slot.

[0165] In the NR system, one time slot includes all of the downlink control channel, downlink or uplink data channel, uplink control channel, etc. For example, the first N symbols in the time slot can be used to transmit the downlink control channel (subsequently, the downlink control area), and the last M symbols in the time slot can be used to transmit the uplink control channel (subsequently, the uplink control area). Both N and M are integers of 0 or greater. The resource area (subsequently, the data area) located between the downlink control area and the uplink control area can be used to transmit downlink data or uplink data. As an example, one time slot can correspond to one of the following configurations. List each period in chronological order.

[0166] 1. DL - only configuration

[0167] 2. UL - only configuration

[0168] 3. Hybrid UL - DL configuration

[0169] - DL area + GP (guard period) + UL control area

[0170] - DL control area + GP + UL area

[0171] DL area: (i) DL data area, (ii) DL control area + DL data area

[0172] UL area: (i) UL data area, (ii) UL data area + UL control area.

[0173] In the DL control region, PDCCH can be transmitted, and in the DL data region, PDSCH can be transmitted. In the UL control region, PUCCH can be transmitted, and in the UL data region, PUSCH can be transmitted. In the PDCCH, downlink control information (DCI), such as DL data scheduling information or UL data scheduling information, can be transmitted. In the PUCCH, uplink control information (UCI), such as ACK / NACK (acknowledgment / negative acknowledgment) information for DL data, channel state information (CSI) information, or scheduling request (SR), can be transmitted. The GP provides a time gap during the process of the gNB and UE transitioning from the transmission mode to the reception mode or during the process of the gNB and UE transitioning from the reception mode to the transmission mode. The symbol part within a subframe that belongs to the timing when the mode changes from DL to UL can be configured as the GP.

[0174] <Analog beamforming #1>

[0175] The wavelength is shortened to millimeter wave (mmW), so a large number of antenna elements can be installed in the same area. That is, the wavelength is 1 cm at 30 GHz, so a total of 100 antenna elements can be installed in a 5×5 cm panel in the form of a two-dimensional array at an interval of 0.5λ (wavelength). Therefore, a large number of antenna elements can be used in mmW to increase the beamforming (BF) gain to increase the coverage range or improve the throughput.

[0176] In this case, if a transceiver unit (TXRU) is provided to adjust the transmission power and phase of each antenna element, independent beamforming for each frequency resource can be performed. However, installing TXRUs for all approximately 100 antenna elements reduces efficiency in terms of cost. Therefore, a method of using analog phase shifters to map a large number of antenna elements to one TXRU and control the beam direction is considered. This analog beamforming can only form one beam direction in all frequency bands, so it cannot provide frequency-selective beamforming.

[0177] Hybrid beamforming (BF) with B TXRUs fewer than Q antenna elements can be considered an intermediate form between digital BF and analog BF. In this case, the number of beam directions that can be transmitted simultaneously is limited to B, although this number depends on the method of connecting B TXRUs and Q antenna elements.

[0178] <Analog beamforming #2>

[0179] When multiple antennas are used in NR, hybrid beamforming, which is a combination of digital beamforming and analog beamforming, appears. Here, in analog beamforming (or RF beamforming), the RF side performs precoding (or combining), so that it is possible to achieve performance similar to digital beamforming while reducing the number of RF chains and the number of D / A (or A / D) converters. For ease of description, the hybrid beamforming structure can be represented by N TXRUs and M physical antennas. Then, the digital beamforming of L data layers transmitted at the transmitting end can be represented by an N×L matrix, and the converted N digital signals are converted into analog signals via the TXRUs, and analog beamforming represented by an M×N matrix is applied.

[0180] The system information of the NR system can be transmitted in broadcast mode. In this case, in one symbol, the analog beams belonging to different antenna panels can be transmitted simultaneously. A scheme of introducing beam reference signal (BRS) as a reference signal (RS) transmitted by applying a single analog beam (corresponding to a specific antenna panel) is being discussed to measure the channel of each analog beam. BRS can be defined for multiple antenna ports, and each antenna port of BRS can correspond to a single analog beam. In this case, different from BRS, the synchronization signal or xPBCH can be transmitted by applying all the analog beams within the analog beam group so as to be correctly received by any UE.

[0181] In NR, in the time domain, the synchronization signal block (SSB, or also referred to as synchronization signal and physical broadcast channel (SS / PBCH)) can consist of 4 OFDM symbols indexed in ascending order from 0 to 3 within the synchronization signal block, and the primary synchronization signal (PSS), secondary synchronization signal (SSS), and PBCH associated with the demodulation reference signal (DMRS) can be mapped to the symbols. As described above, the synchronization signal block can also be represented by the SS / PBCH block.

[0182] In NR, since multiple synchronization signal blocks (SSBs) can be transmitted at different times respectively and the SSB can be used for performing initial access (IA), serving cell measurement, etc., it is preferably to transmit the SSB first when the transmission time and resources of the SSB overlap with those of other signals. For this purpose, the network can broadcast the transmission time and resource information of the SSB, or indicate them through UE-specific RRC signaling.

[0183] In NR, transmission and reception can be performed based on beams. If the reception performance of the current serving beam deteriorates, a process of searching for a new beam through so-called beam failure recovery (BFR) can be performed.

[0184] Since the BFR process is not intended to indicate an error or failure of the link between the network and the UE, it can be assumed that the connection to the current serving cell is retained even if the BFR process is executed. During the BFR process, measurements of different beams configured by the network (which can be represented based on CSI-RS ports or synchronization signal block (SSB) indices) can be performed, and the best beam for the corresponding UE can be selected. The UE can perform the BFR process in such a way that it executes the RACH process associated with the beam that produces good measurement results.

[0185] Now, the transmission configuration indicator (hereinafter, TCI) state will be described. The TCI state can be configured for each CORESET of the control channel and can be used to determine the parameters for determining the RX beam of the UE based on the TCI state.

[0186] For each DL BWP of the serving cell, the UE can be configured for three or fewer CORESETs. Additionally, the UE can receive the following information for each CORESET.

[0187] 1) CORESET index p (for example, one of 0 to 11, where the index of each CORESET can be uniquely determined among the BWPs of a serving cell),

[0188] 2) PDCCH DM-RS scrambling sequence initialization value,

[0189] 3) Duration of the CORESET in the time domain (which can be given in symbols),

[0190] 4) Resource block set,

[0191] 5) CCE to REG mapping parameter,

[0192] 6) Antenna port quasi co-location, which indicates the quasi co-location (QCL) information of the DM-RS antenna port used to receive the PDCCH in each CORESET (from a set of antenna port quasi co-locations provided by a higher layer parameter called "TCI-State"),

[0193] 7) Indication of the existence of the transmission configuration indication (TCI) field for a specific DCI format transmitted by the PDCCH in the CORESET, etc.

[0194] A QCL will be described. Two antenna ports are said to be quasi - co - located (QCL) if the characteristics of the channel through which the symbols on one antenna port are transmitted can be inferred from the characteristics of the channel through which the symbols on the other antenna port are transmitted. For example, when two signals A and B are transmitted from the same transmit antenna array applying the same / similar spatial filters, the two signals may experience the same / similar channel states. From the perspective of the receiver, when one of the two signals is received, the other signal can be detected by using the channel characteristics of the received signal.

[0195] In this sense, when signals A and B are said to be quasi - co - located (QCL), this may mean that signals A and B have experienced similar channel conditions. Therefore, the channel information estimated for detecting signal A is also useful for detecting signal B. In this article, the channel conditions can be defined according to, for example, Doppler shift, Doppler spread, average delay, delay spread, spatial reception parameters, etc.

[0196] The "TCI - State" parameter associates one or two downlink reference signals with corresponding QCL types (QCL types A, B, C, and D, see Table 4).

[0197] [Table 4]

[0198] QCL type Description QCL-Type A Doppler shift, Doppler spread, mean delay, delay spread QCL-Type B Doppler shift, Doppler spread QCL-Type C Doppler shift, mean delay QCL-Type D Spatial Rx parameter

[0199] Each "TCI - State" may include parameters for configuring the QCL relationship between one or two downlink reference signals and the DM - RS ports of the PDSCH (or PDDCH) or the CSI - RS ports of the CSI - RS resources.

[0200] In addition, for each DL BWP configured for a UE in a serving cell, the UE may be provided with 10 (or fewer) search space sets. For each search space set, the UE may be provided with at least one of the following information.

[0201] 1) Search space set index s (0 ≤ s < 40), 2) The association between CORESET p and search space set s, 3) PDCCH monitoring periodicity and PDCCH monitoring offset (in slot units), 4) The PDCCH monitoring pattern within a slot (e.g., indicating the first symbol of the CORESET in the slot for PDCCH monitoring), 5) The number of slots in which search space set s exists, 6) The number of PDCCH candidates for each CCE aggregation level, 7) Information indicating whether search space set s is a CSS or USS.

[0202] In NR, CORESET #0 can be configured via PBCH (or UE-specific signaling for handover or PSCell configuration or BWP configuration). The search space (SS) set #0 configured via PBCH can monitor different offsets (e.g., slot offset, symbol offset) for each associated SSB. This may be required to minimize the search space occasions monitored by the UE. Alternatively, this may be required to provide, for each beam, a beam-scanning control / data region where control / data transmission can be performed so as to persistently perform communication with the UE in a situation where the optimal beam of the UE changes dynamically.

[0203] Figure 22 Illustrates physical channels and typical signal transmissions.

[0204] Refer to Figure 22 , in a wireless communication system, the UE receives information from the BS via the downlink (DL), and the UE sends information to the BS via the uplink (UL). The information transmitted / received by the BS and the UE includes data and various control information, and there are various physical channels according to the type / purpose of the information transmitted / received by the BS and the UE.

[0205] A UE that is powered on again in a power-off state or newly enters a cell performs an initial cell search operation (S11) such as adjusting synchronization with the BS. For this purpose, the UE receives the primary synchronization channel (PSCH) and the secondary synchronization channel (SSCH) from the BS to adjust synchronization with the BS and acquire information such as the cell identity (ID). In addition, the UE may receive the physical broadcast channel (PBCH) from the BS to acquire broadcast information in the cell. In addition, the UE may receive the downlink reference signal (DL RS) in the initial cell search step to identify the downlink channel state.

[0206] After completing the initial cell search, the UE may receive the physical downlink control channel (PDCCH) and the corresponding physical downlink shared channel (PDSCH) to acquire more specific system information (S12).

[0207] Thereafter, the UE may perform a random access procedure to complete access to the BS (S13 to S16). Specifically, the UE may transmit a preamble via the physical random access channel (PRACH) (S13), and may receive a random access response (RAR) for the preamble via the PDCCH and the corresponding PDSCH (S14). Thereafter, the UE may transmit the physical uplink shared channel (PUSCH) by using the scheduling information in the RAR (S15), and may perform a contention resolution procedure similar to that of the PDCCH and the corresponding PDSCH (S16).

[0208] After performing the above-mentioned procedures, the UE may perform PDCCH / PDSCH reception (S17) and PUSCH / Physical Uplink Control Channel (PUCCH) transmission (S18) as typical uplink / downlink signal transmission procedures. The control information sent from the UE to the BS is referred to as uplink control information (UCI). UCI includes Hybrid Automatic Repeat reQuest (HARQ) Acknowledgment (ACK) / Negative ACK (NACK), Scheduling Request (SR), Channel State Information (CSI), etc. CSI includes Channel Quality Indicator (CQI), Precoding Matrix Indicator (PMI), Rank Indicator (RI), etc. Generally, UCI is sent through the PUCCH. However, when control information and data are to be sent simultaneously, UCI may be sent through the PUSCH. Additionally, the UE may send UCI irregularly through the PUSCH according to the request / indication of the network.

[0209] In order to have reasonable battery consumption when configuring Bandwidth Adaptation (BA), only one uplink BWP and one downlink BWP or only one downlink / uplink BWP pair per uplink carrier can be activated at a time in the active serving cell, and all other BWPs configured in the UE are deactivated. In the deactivated BWPs, the UE does not monitor the PDCCH and does not perform transmission on the PUCCH, PRACH, and UL-SCH.

[0210] For BA, the RX and TX bandwidths of the UE do not necessarily have to be as wide as the bandwidth of the cell and can be adjusted. That is, it can be commanded to change the width (e.g., reduce for low activity periods for power saving), move the position in the frequency domain (e.g., to increase scheduling flexibility), and change the subcarrier spacing (e.g., to allow for different services). A subset of the entire cell bandwidth of the cell is referred to as a Bandwidth Part (BWP), and BA is obtained by configuring the BWP for the UE and by notifying the UE of the currently active BWP among the configured BWPs. When configuring BA, the UE only needs to monitor the PDCCH on one active BWP. That is, it is not necessary to monitor the PDCCH over the entire downlink frequency of the cell. The BWP Inactivity Timer (independent of the above-mentioned DRX Inactivity Timer) is used to switch the active BWP to the default BWP. That is, when the PDCCH decoding is successful, the timer restarts, and when the timer expires, it switches to the default BWP.

[0211] Figure 23 A scenario in which three different bandwidth parts are configured is illustrated.

[0212] Figure 23An example of configuring BWP1, BWP2, and BWP3 on time-frequency resources is shown. BWP1 may have a width of 40 MHz and a subcarrier spacing of 15 kHz. BWP2 may have a width of 10 MHz and a subcarrier spacing of 15 kHz. BWP3 may have a width of 20 MHz and a subcarrier spacing of 60 kHz. In other words, each BWP may have a different width and / or a different subcarrier spacing.

[0213] In the following, the present disclosure proposes a cross-slot scheduling method and a device using the method in a wireless communication system.

[0214] In NR, power saving techniques are being discussed to reduce the power consumption of UEs, and among these techniques, there are power saving techniques using cross-slot scheduling.

[0215] The power saving technique using cross-slot scheduling indicates the minimum slot offset between the DCI and the PDSCH scheduled in the DCI. The power consumption can be reduced by the UE applying PDCCH decoding relaxation or (micro) sleep in the duration guaranteed by the minimum slot offset (e.g., using a low voltage / low clock speed). For example, assume the minimum slot offset is 2. In this case, if the UE receives the DCI in slot #N, the UE sleeps in slot #N + 1 and wakes up in slot #N + 2 to receive the PDSCH scheduled by the DCI. Since the minimum slot offset is 2, it is possible to sleep in slot #N + 1. The minimum slot offset can be referred to as the minimum applicable slot offset or the minimum applicable offset, the minimum scheduling offset, etc.

[0216] As a specific example, the network may set the minimum applicable K0 / K2 values to indicate to the UE the minimum slot offset between the DCI and the corresponding scheduled PDSCH / PUSCH when scheduling the PDSCH or PUSCH. Here, K0 may be an offset (slot offset) related to the time relationship between the slot in which the DCI is received and the slot in which the PDSCH scheduled by the DCI is received. K0 may be based on the parameter set of the PDSCH. K2 may be an offset (slot offset) related to the time relationship between the slot in which the DCI is received and the slot in which the PUSCH scheduled by the DCI is transmitted. K2 may be based on the parameter set of the PUSCH. It can be seen that the minimum applicable K0 indicates the minimum applicable value (limit) when setting the K0 value, and the minimum applicable K2 indicates the minimum applicable value (limit) when setting the K2 value. In the following, the minimum applicable K0 may be denoted as K0min, and the minimum applicable K2 may be denoted as K2min.

[0217] For example, the base station may indicate K0 and K2 to the UE in the following manner.

[0218] When the UE is scheduled to receive the PDSCH via DCI, the value m of the time domain resource assignment field of the DCI provides the row index m + 1 in the resource allocation table. The indexed row directly defines the slot offset K0, the start and length indicator SLIV, or the start symbol S and the allocation length L, and the PDSCH mapping type assumed during PDSCH reception.

[0219] The following table is an example of a resource allocation table.

[0220] [Table 5]

[0221]

[0222] Given the parameter values of the indexed row, the slot allocated to the PDSCH is floor(n·(2 μPDSCH / 2 μPDCCH )) + K0. Here, n is the slot with the scheduling DCI, and K0 is based on the parameter set of the PDSCH. Each of μ PDSCH and μ PDCCH is the subcarrier spacing configuration for each of the PDSCH and the PDCCH.

[0223] The start symbol S at the start of the slot and L (the number of symbols allocated to the PDSCH) - i.e., the number of consecutive symbols counted from symbol S - are determined by the "start and length indicator" SLIV.

[0224] When the UE is scheduled to transmit a transport block but there is no CSI report, or when the UE is scheduled via DCI to transmit a transport block and a CSI report in the PUSCH, the value m of the time domain resource assignment field of the DCI provides the row index m + 1 in the allocation table. The indexed row directly defines the slot offset K2, the start and length indicator SLIV, or the start symbol S and the allocation length L, and the PUSCH mapping type to be applied to the PUSCH transmission.

[0225] The slot in which the UE should transmit the PUSCH can be determined by K2 as floor(n·(2 μPUSCH / 2 μPDCCH )) + K2. Here, n is the slot with the scheduling DCI, and K2 is based on the parameter set of the PUSCH. μ PUSCH and μ PDCCH are the subcarrier spacing configurations for the PUSCH and the PDCCH, respectively.

[0226] The start symbol S at the start of the slot (relative to the start of the slot) and L (the number of consecutive symbols allocated to the PUSCH counted from symbol S) are determined from the start and length indicator SLIV of the indexed row.

[0227] On the other hand, in the case of indicating / changing the minimum applicable K0 / K2 (K0min / K2min), when applying the corresponding indication / change, it can be determined by "application delay", and the application delay can be defined as follows. Hereinafter, for convenience, the application delay may be expressed as X or application delay X.

[0228] For the application delay X for applying the minimum applicable K0 / K2 value indicated for the scheduled cell triggered by a 1-bit indication of DCI format 1_1 or 0_1 in the scheduling cell,

[0229] The UE receives in slot n of the scheduling cell a DCI indicating a change in the minimum applicable K0 / K2 value.

[0230] The UE may assume that the new minimum applicable K0 / K2 value is applied to the PDSCH / PUSCH of the scheduled cell starting from slot (n + X) of the scheduling cell. That is, when a DCI indicating a change in the minimum applicable K0 / K2 value is received in slot n of the scheduling cell, the changed minimum applicable K0 / K2 value is applied starting from slot n + X of the scheduling cell.

[0231] In the case of subcarrier scheduling and at least PDCCH monitoring case 1-1 (described later), X = max(Y, Z). Here, Y is the active minimum applicable K0 value of the active DL BWP before the change indication, and Z is (1, 1, 2, 2) for each downlink subcarrier spacing (DL SCS) (15, 30, 60, 120) kHz.

[0232] In the above definition, Z can be defined as "the minimum feasible non-zero application delay that can depend on the DL-SCS", and it can be interpreted as the minimum time for PDCCH decoding.

[0233] When Y is 0 or less than Z, the value of Z is applied. In this case, the new minimum applicable value K0 / K2 (K0min / K2min) may mean that it is applied starting from the time point when the UE recognizes the corresponding value (i.e., the end time of PDCCH decoding).

[0234] Figure 24 is an application example of the application delay.

[0235] Refer to Figure 24(a), The UE receives DCI in slot m and receives the PDSCH scheduled by the DCI in slot m+K0. In this case, for example, it is assumed that the K0min value as the minimum applicable slot offset is 1 and the K0 value is 2. Then, the UE can receive DCI including information indicating a change in the minimum applicable slot offset in slot n. Accordingly, for example, it is assumed that the value of K0min changes to 0. In this case, the change in the minimum applicable slot offset is applied starting from slot n+X, rather than starting from slot n. The value of X can be determined as the maximum value among Y and Z, such as max(Y,Z). Here, Y is the active minimum applicable K0 value of the active DL BWP before the change indication. For the case where the DL SCS is (15, 30, 60, 120) kHz, Z can be (1, 1, 2, 2) in sequence. In slot n+X, the UE can receive DCI indicating 0 as the value of K0 and can also receive the PDSCH scheduled by the DCI.

[0236] Refer to Figure 24 (b), The UE can receive DCI#1 including information indicating a change in the minimum applicable slot offset in slot n. In this case, the changed minimum applicable slot offset (referred to as K0minNew) is applied starting from slot n+X, rather than directly starting from slot n. That is, DCI#2 received in slot n+X indicates a K0 value greater than or equal to K0minNew. From the perspective of the UE, starting from slot n+X, it is expected to receive DCI indicating a K0 value greater than or equal to K0minNew. Until slot n+X, the existing minimum applicable slot offset (referred to as K0minOld) is applied.

[0237] PDCCH monitoring cases 1-1, 1-2, and 2 can be defined as follows.

[0238] Case 1: The case where the PDCCH monitoring period is 14 or more symbols.

[0239] Case 1-1: The case where PDCCH monitoring is performed on up to 3 OFDM symbols starting from the beginning of the slot.

[0240] Case 1-2: The case where PDCCH monitoring is performed on any up to 3 consecutive OFDM symbols of the slot.

[0241] For a given UE, all search space configurations are within the same range of three consecutive OFDM symbols in the slot.

[0242] Case 2: The case where the PDCCH monitoring period is less than 14 symbols. This includes monitoring the PDCCH on up to 3 OFDM symbols starting from the beginning of the slot.

[0243] The present disclosure proposes a method for defining "application delay" and cross-carrier scheduling in each case.

[0244] <Application delay>

[0245] Figure 25 Illustrates the location of the CORESET for PDCCH monitoring.

[0246] Refer to Figure 25 , the first CORESET 151 for PDCCH monitoring is located within the first three symbols of the time slot, and the second CORESET 152 for PDCCH monitoring is located outside the first three symbols of the time slot. For example, it can be located within the last three symbols of the time slot. It can be seen that the first CORESET 151 corresponds to cases 1-1 and 1-2 mentioned above, and the second CORESET 152 corresponds to case 1-2 mentioned above.

[0247] That is, in case 1-2, different from case 1-1 (the CORESET for PDCCH monitoring is located within the first 3 symbols of the time slot), there is no position restriction in the time slot of the CORESET for monitoring PDCCH. As Figure 25 shown in, the network can instruct the UE to place the CORESET in the last 3 symbols of the time slot and monitor the PDCCH. This means that the PDCCH decoding end time (i.e., the DCI decoding end time) can be different according to the position of the CORESET. This should be considered when determining the application delay X value changed by indicating the minimum applicable value K0 / K2 (K0min / K2min) through DCI and determining the application timing.

[0248] For example, when Y = 0 and Z = 1, given X = max(Y, Z) = 1. This means that the changed minimum applicable value K0 / K2 (K0min / K2min) is applied to the immediately following indicated changed time slot. However, there may be cases where this is not possible.

[0249] For example, the PDCCH decoding can end in the next time slot. For example, if the CORESET for PDCCH monitoring is located in the last 3 symbols of the time slot, the UE will receive the PDCCH in the last 3 symbols and then decode the PDCCH in the next time slot. Therefore, it may not be possible to apply the PDCCH decoding result starting from the next time slot.

[0250] To solve such problems, the present disclosure proposes the following method. A solution using the Z value is proposed below, but the same method can be applied to the X or Y value.

[0251] Option 1) It can be applied by adding a predefined Z value to a specific value (e.g., 1).

[0252] Option 1 is the simplest solution, and in cases 1-2, the application delay can be derived by adding a specific value (e.g., 1) to the Z value. In this case, this specific value can be predefined or indicated by higher layer signaling of the network (e.g., RRC, MAC CE, etc.).

[0253] Option 2) Determine the Z value based on the position of the CORESET (set).

[0254] The UE can determine whether to add a specific value (e.g., 1) to the Z value according to the position of the CORESET to be monitored in the corresponding time slot. For this purpose, the position of the CORESET used as a reference can be predefined or indicated by higher layer signaling of the network. Alternatively, the reference position of the CORESET can be determined according to the decoding capability of the UE. In this case, the UE can report the decoding capability (e.g., the position of the CORESET that can terminate PDCCH decoding within the corresponding time slot).

[0255] As the CORESET, all the CORESETs monitored in the corresponding time slot can be considered, or the application can be restricted to the CORESET in which the monitoring can indicate the non-backoff DCI with the minimum applicable K0 / K2.

[0256] For example, when there is all or part of the CORESET (where PDCCH monitoring needs to be performed) after a specific symbol index (pre-indicated, or indicated by higher layer signaling of the network, or indicated by the capability reported by the UE), the UE can derive the application delay by adding a predefined Z value with a specific value (e.g., 1).

[0257] Option 3) Z value specific to cases 1-2.

[0258] The network can separately indicate the Z value to be applied to cases 1-2. Alternatively, the Z value for cases 1-2 can be determined by a predefined definition. In addition, as in Option 2, in Option 3, it can be determined whether to apply the Z value for cases 1-2 according to the position of the CORESET.

[0259] Case 2.

[0260] Case 2 refers to the case where multiple monitoring opportunities of a specific search space set are set (or can be set) in one time slot. In Case 2, the following methods can be considered.

[0261] Option 1) A method that does not apply the power saving technique using cross-slot scheduling to Case 2.

[0262] As described above, the power saving technique using cross-slot scheduling is a scheme that performs power saving operations during the slot offset between the PDCCH and the scheduled PDSCH. However, in Case 2, since one search space set can have multiple monitoring occasions within one slot, it may be difficult to expect power saving due to dormancy or the like. Therefore, in Case 2, it can be assumed that the power saving operation by the minimum applicable K0 is not performed.

[0263] In addition, the PDCCH monitoring occasion is determined by the search space set configuration. When multiple search space sets are configured, different cases can be applied to each slot. Therefore, when different cases are applied to each slot, Option 1 can be interpreted as suggesting to assume that cross-slot scheduling is not applied in the slot corresponding to Case 2, or the minimum applicable value K0 / K2 is not changed in the slot corresponding to Case 2.

[0264] As another method, when the minimum applicable value K0 / K2 is newly indicated (i.e., changed) by the DCI sent in the slot corresponding to Case 2, the UE can ignore the indication. This method can be applied to both Case 1-2 and Case 2.

[0265] Option 2) Apply the method of application delay for each monitoring occasion

[0266] Since the application delay means the time to apply the newly indicated minimum applicable value K0 / K2, it is also possible to consider defining the method of application delay for each monitoring occasion. Therefore, in Case 2, the application delay can be applied for each monitoring occasion, which can mean that the method of deriving the application delay applied to Case 1-1 and Case 1-2 is applied according to the position of the monitoring occasion in the slot.

[0267] <Cross-carrier scheduling>

[0268] Cross-carrier scheduling refers to a method of scheduling the PDSCH of the scheduled cell (the cell to be scheduled) in the PDCCH of the scheduling cell (the cell that performs scheduling). That is, the PDCCH for PDSCH scheduling is decoded in the scheduling cell (more specifically, the active DL BWP of the scheduling cell), and the scheduling of the PDSCH transmitted in the scheduled cell (more specifically, the active DL BWP of the scheduled cell) is performed through the corresponding DCI.

[0269] When applying the power saving technique using cross-slot scheduling in the scheduled cell (active BWP), the application delay of the minimum applicable value K0 / K2 of the scheduled cell (active BWP) can be defined as follows.

[0270] Option 1) Based on the application delay of the scheduling cell (active BWP)

[0271] The application delay can be interpreted as the offset from the time slot in which the DCI indicating the new minimum applicable K0 / K2 is transmitted to the time slot in which the corresponding value is actually applied. This is closely related to PDCCH decoding. As described above, since cross-carrier scheduling is the process of scheduling the PDSCH of the scheduled cell through the PDCCH in the scheduling cell, it may be desirable to replace the application delay of the minimum applicable value K0 / K2 of the scheduled cell with the application delay of the scheduling cell (active BWP). Therefore, the present disclosure proposes to determine Y and / or Z as parameters for determining the application delay based on the scheduling cell.

[0272] For example, in cross-carrier scheduling, the application delay of the scheduled cell can be determined as follows. (Alternatively, it can be defined to follow the application delay of the scheduling cell.)

[0273] For the application delay X for applying the minimum applicable K0 / K2 value indicated for the scheduled cell triggered by the 1-bit indication of DCI format 1_1 or 0_1 in the scheduling cell,

[0274] The UE receives the DCI indicating the change in time slot n of the scheduling cell,

[0275] The UE can schedule with the minimum applicable K0 / K2 value for the PDSCH / PUSCH of the scheduled cell in the DCI in time slot (n+X) of the scheduling cell.

[0276] For cross-carrier scheduling, X = max(Y,Z). Here, Y is the active minimum applicable K0 value of the active DL BWP of the scheduling cell, and for each downlink subcarrier spacing (DL SCS) (15, 30, 60, 120) kHz of the active BWP of the scheduling cell, Z is (1, 1, 2, 2) respectively.

[0277] Option 2) Based on the application delay of the scheduled cell (active BWP)

[0278] When the UE performs processing (e.g., PDCCH decoding) on the scheduling cell and the scheduled cell respectively, the PDCCH scheduling the PDSCH of the scheduled cell is transmitted in the scheduling cell, but the changed application delay of the minimum applicable value for the scheduled cell can be determined based on the scheduled cell. However, in this case, if the scheduled cell and the scheduling cell have different parameter sets, scaling may be required to adapt to the processing of the parameter set of the scheduling cell. For example, in cross-carrier scheduling, the application delay of the scheduled cell can be determined as follows.

[0279] In the application delay X for applying the minimum applicable K0 / K2 value indicated for the scheduled cell triggered by the 1-bit indication of DCI format 1_1 or 0_1 in the scheduling cell,

[0280] The UE receives DCI indicating a change in slot n of the scheduling cell.

[0281] The UE can be scheduled in the DCI in slot (n + X) of the scheduling cell with the minimum applicable K0 / K2 value for the PDSCH / PUSCH of the scheduled cell.

[0282] For cross-carrier scheduling, X = max(Y, Z) · (2 μscheduling / 2 μscheduled ) or X = ceil(max(Y, Z) · (2 μscheduling / 2 μscheduled ))). Here, Y is the active minimum applicable K0 value of the active DL BWP of the scheduled cell before the change indication. For each downlink subcarrier spacing (DL-SCS) (15, 30, 60, 120) kHz of the active BWP of the scheduled cell, Z is (1, 1, 2, 2) respectively.

[0283] In the above formula, μscheduling represents the parameter set (subcarrier spacing configuration) of the scheduling cell, and μscheduled represents the parameter set (subcarrier spacing configuration) of the scheduled cell. For {15 kHz, 30 kHz, 60 kHz, 120 kHz}, they can have values {0, 1, 2, 3} respectively.

[0284] Option 3) A combination of Option 1 and Option 2

[0285] The parameters Y and Z can be determined based on the scheduled cell and the scheduling cell respectively. For example, since Y means the minimum applicable value K0 / K2 before the change, it is determined based on the scheduled cell where the minimum applicable value is applied. And Z can be determined based on the scheduling cell where the actual PDCCH decoding is performed.

[0286] In cross-carrier scheduling, the application delay of the scheduled cell can be determined as follows.

[0287] In the application delay X for applying the minimum applicable K0 / K2 value (K0min / K2min) indicated for the scheduled cell triggered by the 1-bit indication in DCI format 1_1 or 0_1 in the scheduling cell,

[0288] The UE receives DCI indicating a change in slot n of the scheduling cell.

[0289] The UE can be scheduled in the DCI in slot (n + X) of the scheduling cell with the minimum applicable K0 / K2 value for the PDSCH / PUSCH of the scheduled cell.

[0290] For cross-carrier scheduling, X = max(Y · (2 μscheduling / 2μscheduled ), Z) or X = max(ceil(Y · (2 μscheduling / 2 μscheduled ))), Z). Here, Y is the active minimum applicable K0 value of the scheduled cell before the change indication, and for each downlink subcarrier spacing (DL SCS) (15, 30, 60, 120) kHz of the active BWP of the scheduled cell, Z is (1, 1, 2, 2), respectively.

[0291] Figure 26 An example of a method for determining an application delay value according to Option 3 is illustrated.

[0292] Referring to Figure 26 , the UE can access the base station through a random access procedure (S260). For example, the UE can send a random access preamble to the base station and receive a random access response (RAR) signal for the random access preamble from the base station. The UE can send a PUSCH by using the scheduling information in the RAR and can perform a contention resolution process such as PDCCH and the corresponding PDSCH.

[0293] After the UE accesses the base station, the UE receives downlink control information (DCI) including information indicating a change in the value of K0min or K2min in slot n of the scheduled cell (S261). The DCI can be received in the symbols before a specific symbol index of slot n (e.g., the first 3 symbols of slot n).

[0294] Each of K0min and K2min is the minimum scheduling offset limit applied. Specifically, K0min can be the minimum scheduling offset limit related to the minimum value of the offset between the slot for receiving the first DCI and the slot for receiving the physical downlink shared channel (PDSCH) scheduled by the first DCI, and K2min can be the minimum scheduling offset limit related to the minimum value of the offset between the slot for receiving the second DCI and the slot for sending the physical uplink shared channel (PUSCH) scheduled by the second DCI.

[0295] The UE can determine the application delay X as i) the first value obtained by multiplying the currently applied K0min (referred to as Y) in the scheduled cell scheduled by the DCI by 2 μscheduling / 2 μscheduled and then performing ceiling and ii) the maximum value (referred to as Z) predetermined according to the subcarrier spacing (SCS) of the scheduled cell (S262).

[0296] That is, the application delay X can be determined by the following formula.

[0297] [Equation 1]

[0298]

[0299] μscheduling is the subcarrier spacing configuration of the scheduling cell (i.e., the subcarrier spacing configuration associated with the PDCCH, and thus, μscheduling can be represented as μPDCCH), and μscheduled is the subcarrier spacing configuration of the scheduled cell (i.e., the subcarrier spacing configuration associated with the PDSCH, and thus, μscheduled can be represented as μPDSCH). Y is the K0min value currently applied to the scheduled cell, and Z is the second value.

[0300] According to the subcarrier spacing (SCS) (or subcarrier spacing configuration μ) of the scheduling cell, Z can be predetermined as shown in the following table.

[0301] [Table 6]

[0302] μ Z 0 1 1 1 2 2 3 2

[0303] That is, when the subcarrier spacing (SCS) of the scheduling cell is 15, 30, 60, and 120 kHz, the Z values can be predetermined as 1, 1, 2, and 2, respectively.

[0304] The UE applies the changed K0min or changed K2min value (S263) starting from slot n+X of the scheduling cell.

[0305] On the other hand, as described above in "Option 2) Determine the Z value based on the position of the CORESET (group)", if DCI is received in a symbol after a specific symbol index in slot n (e.g., a symbol outside the first 3 symbols of slot n), then after incrementing the second value Z by 1, the value of X is determined. The reason for this is that considering the position of the CORESET, the decoding (completion) timing of the DCI may be slot n+1 instead of slot n.

[0306] For example, assume that downlink control information (DCI) including information indicating a change in the value of K0min or K2min is received in the last three symbols of slot n. In this case, Equation 1 is used to obtain the application delay X, but instead of the Z value in Table 6, the Z value in Table 6 incremented by 1 (i.e., Z+1) is then used for Z in Equation 1.

[0307] Figure 27 is an example of applying Figure 26 the method in

[0308] Refer to Figure 27, assume that the subcarrier spacing (SCS) of the scheduling cell is configured with μ = 0, and the SCS of the scheduled cell is configured with μ = 1. For convenience, assume that the current K0min (i.e., Y) applied to the scheduled cell is referred to as K0minOld, and its value is 1. Since the subcarrier spacing (SCS) of the scheduling cell is configured with μ = 0, Z = 1.

[0309] The DCI including the information indicating the change of K0min can be received within the first three symbols of slot n of the active DL BWP of the scheduling cell. Additionally, assume that the DCI is a DCI for cross-carrier scheduling.

[0310] For example, the DCI can be DCI format 0_1 for scheduling one or more PUSCHs and DCI format 1_1 for scheduling PDSCHs. Each of DCI format 0_1 and DCI format 1_1 may or may not include a 1-bit "minimum applicable scheduling offset indicator". Figure 27 Illustrates the inclusion case. In the case of DCI format 0_1, when the value of the "minimum applicable scheduling offset indicator" is 0, it indicates the first value among the K2min values set by the higher layer signal. When the value of the "minimum applicable scheduling offset indicator" is 1, it indicates the second value (if any) among the K2min values set by the higher layer signal or 0 (if there is no second value). In the case of DCI format 1_1, when the value of the "minimum applicable scheduling offset indicator" is 0, it indicates the first value among the K0min values set by the higher layer signal. When the value of the "minimum applicable scheduling offset indicator" is 1, it indicates the second value (if any) among the K0min values set by the higher layer signal or 0 (if there is no second value).

[0311] Whether to indicate the change of the K0min / K2min value can be determined according to the value of K0min / K2min indicated by the "minimum applicable scheduling offset indicator".

[0312] When the DCI indicates the change of the value of K0min( / K2min), the time point to apply the changed K0min( / K2min) is slot n + X, where, according to Equation 1 above, X is X = max(ceil(1·2 0 / 2 1 ), 1) = 1. Therefore, the time point to apply the changed K0min / K2min becomes slot n + 1.

[0313] Figure 28 is another example of applying the Figure 26 method in

[0314] Refer to Figure 28, assume that the subcarrier spacing (SCS) of the scheduling cell is configured with μ = 2, and the SCS of the scheduled cell is configured with μ = 1. For the sake of convenience, assume that the current K0min (i.e., Y) applied to the scheduled cell is called K0minOld, and its value is 1. Since the subcarrier spacing (SCS) of the scheduling cell is configured with μ = 2, Z = 2.

[0315] The DCI including the information indicating the change of K0min can be received within the first three symbols of slot n of the active DL BWP of the scheduling cell. Additionally, assume that the DCI is a DCI for cross-carrier scheduling.

[0316] When the DCI indicates a change in the value of K0min( / K2min), the time point to apply the changed K0min( / K2min) is slot n+X, where, according to Equation 1, X = max(ceil(1,2 2 / 2 1 ),2)=2. Therefore, the time point to apply the changed K0min / K2min becomes slot n+2.

[0317] Figure 29 Illustrates the signaling method between the network (base station) and the UE.

[0318] Refer to Figure 29 , the UE can access the base station through the random access procedure (S290). The random access procedure has been described above. Thereafter, the base station provides the UE with a higher layer signal for setting the K0min value (S291). The base station provides the UE with a higher layer signal for setting the K0min value (S191). For example, "minimumSchedulingOffsetK0" for setting UE-specific PDSCH parameters can be provided through "PDSCH-Config", and "minimumSchedulingOffsetK0" can include a list of K0min values.

[0319] The base station sends a first DCI including the information indicating the change of K0min to the UE in slot n of the scheduling cell (S292). The first DCI can be DCI format 1_1. The first DCI can be sent within or outside the first three symbols of slot n, and the Z value used to determine the application delay X can vary according to where the first DCI is sent. This has been described above. The first DCI can inform the change of K0min through a 1-bit field. This has been described above.

[0320] The UE determines an application delay value X related to the time of applying the changed K0min (S293). As described above, the value of X can be determined based on the current K0min of the scheduled cell, the SCS configurations of the scheduling cell and the scheduled cell, and a predetermined value depending on the SCS configuration of the scheduling cell. For example, Equation 1 can be used.

[0321] The base station transmits a second DCI (second DCI based on the changed K0min) applying the changed K0min in the time slot n+X of the scheduling cell (S294). Thereafter, a PDSCH scheduled by the second DCI is transmitted in the scheduled cell (S295). The time interval between the second DCI and the PDSCH must be equal to or greater than the changed K0min. In this time interval, the UE can perform a sleep operation or a PDCCH decoding relaxation operation to save power.

[0322] Figure 30 An example signaling method between the network (base station) and the UE is illustrated.

[0323] Refer to Figure 30 The UE can access the base station through a random access procedure (S300). The random access procedure has been described above. The base station provides a higher layer signal for setting the value of K2min to the UE (S301). For example, "minimumSchedulingOffsetK2" for setting UE-specific PUSCH parameters can be provided by "PUSCH-Config", and "minimumSchedulingOffsetK2" can include a list of K2min values.

[0324] The base station transmits a third DCI including information indicating a change in K2min to the UE in the time slot n of the scheduling cell (S302). The third DCI can be DCI format 0_1. The third DCI can be transmitted within or outside the first three symbols of the time slot n, and the value of Z for determining the application delay X can vary depending on where it is transmitted. This has been described above. The third DCI can inform the change in K2min through a 1-bit field. This has been described above.

[0325] The UE determines an application delay value X related to the time of applying the changed K2min (S303). As described above, the value of X can be determined based on the current K0min of the scheduled cell, the SCS configurations of the scheduling cell and the scheduled cell, and a predetermined value depending on the SCS configuration of the scheduling cell. For example, Equation 1 can be used.

[0326] The base station transmits the fourth DCI of the changed K2min (the fourth DCI based on the changed K2min) in time slot n+X of the scheduled cell (S304). Thereafter, the PUSCH scheduled by the fourth DCI is received in the scheduled cell (S305). The time interval between the fourth DCI and the PUSCH must be equal to or greater than the changed K2min. During this time interval, the UE can perform a sleep operation or a PDCCH decoding relaxation operation to save power.

[0327] In addition, NR supports multiple parameter sets (or multiple subcarrier spacing (SCS) ranges) to support various 5G services. For example, when the SCS is 15 kHz, it supports wide areas in traditional cellular bands; when the SCS is 30 kHz / 60 kHz, it supports dense cities, lower latency, and wider carrier bandwidths; when the SCS is 60 kHz or higher, it supports bandwidths greater than 24.25 GHz to overcome phase noise.

[0328] NR frequency bands can be defined as two types of frequency ranges (FR1 and FR2). The values of the frequency ranges can change. For example, the two types of frequency ranges (FR1 and FR2) can be as shown in Table 7. For ease of description, FR1 in the frequency range for the NR system can refer to the "range below 6 GHz", and FR2 can refer to the "range above 6 GHz" and can be called millimeter wave (mmW).

[0329] [Table 7]

[0330] Frequency range designation Corresponding frequency range Subcarrier spacing FR1 450 MHz - 6000 MHz 15, 30, 60 kHz FR2 24250 MHz - 52600 MHz 60, 120, 240 kHz

[0331] As exemplified above, the values of the frequency ranges of the NR system can change. For example, FR1 can include frequency bands from 410 MHz to 7125 MHz as shown in Table 8 below. That is, FR1 can include a frequency band of 6 GHz (or 5850, 5900, 5925 MHz, etc.) or larger. For example, the frequency band of 6 GHz (or 5850, 5900, 5925 MHz, etc.) or larger included in FR1 can include unlicensed bands. The unlicensed bands can be used for various purposes, such as communication for vehicles (e.g., autonomous driving).

[0332] [Table 8]

[0333] Frequency range designation Corresponding frequency range Subcarrier spacing FR1 410 MHz - 7125 MHz 15, 30, 60 kHz FR2 24250 MHz - 52600 MHz 60, 120, 240 kHz

[0334] Figure 31 Vehicles or autonomous driving vehicles applied to this specification are exemplified. The vehicle or autonomous driving vehicle can be configured as a mobile robot, car, train, manned / unmanned aerial vehicle (AV), ship, etc.

[0335] Refer toFigure 31 , the vehicle or autonomous driving vehicle 100 may include an antenna unit 108, a communication unit 110, a control unit 120, a driving unit 140a, a power supply unit 140b, a sensor unit 140c, and an autonomous driving unit 140d. The antenna unit 108 may be configured as part of the communication unit 110. Blocks 110 / 130 / 140a to 140d respectively correspond to Figure 28 blocks 110 / 130 / 140 in

[0336] The communication unit 110 may send signals (e.g., data, control signals, etc.) to external devices such as different vehicles, base stations (e.g., base stations, roadside units, etc.), and servers and receive signals (e.g., data, control signals, etc.) from the external devices. The control unit 120 may control the components of the vehicle or autonomous driving vehicle 100 to perform various operations. The control unit 120 may include an electronic control unit (ECU). The driving unit 140a may enable the vehicle or autonomous driving vehicle 100 to travel on the ground. The driving unit 140a may include an engine, a motor, a powertrain, wheels, brakes, a steering device, etc. The power supply unit 140b supplies power to the vehicle or autonomous driving vehicle 100 and may include a wired / wireless charging circuit, a battery, etc. The sensor unit 140c may obtain vehicle conditions, environmental information, user information, etc. The sensor unit 140c may include an inertial measurement unit (IMU) sensor, a collision sensor, a wheel sensor, a speed sensor, an inclination sensor, a weight sensor, a heading sensor, a position module, a vehicle front / rear view mirror sensor, a battery sensor, a fuel sensor, a tire sensor, a steering sensor, a temperature sensor, a humidity sensor, an ultrasonic sensor, a lighting sensor, a pedal position sensor, etc. For example, the autonomous driving unit 140d may implement technologies for maintaining a driving lane, technologies for automatically adjusting speed such as adaptive cruise control, technologies for autonomous driving along a set route, technologies for automatically setting a route and driving when a destination is set, etc.

[0337] For example, the communication unit 110 may receive map data, traffic condition data, etc. from an external server. The autonomous driving unit 140d may generate an autonomous driving route and a driving plan based on the obtained data. The control unit 120 may control the driving unit 140a to move the vehicle or the autonomous driving vehicle 100 along the autonomous driving route according to the driving plan (e.g., speed / direction control). During autonomous driving, the communication unit 110 may obtain updated traffic condition data from the external server irregularly / regularly and may obtain surrounding traffic condition data from neighboring vehicles. Additionally, during autonomous driving, the sensor unit 140c may obtain vehicle condition and environmental information. The autonomous driving unit 140d may update the autonomous driving route and the driving plan based on the newly obtained data / information. The communication unit 110 may send information about the vehicle position, autonomous driving route, driving plan, etc. to the external server. The external server may predict traffic condition data in advance using AI technology, etc. based on the information collected from the vehicle or the autonomous driving vehicle and may provide the predicted traffic condition data to the vehicle or the autonomous driving vehicle.

[0338] The claims disclosed in this specification may be combined in various ways. For example, the technical features in the method claims of this specification may be combined to be implemented or executed in a device, and the technical features in the device claims of this specification may be combined to be implemented or executed in a method. Additionally, the technical features in the method claims and the device claims of this specification may be combined to be implemented or executed in a device. Additionally, the technical features in the method claims and the device claims of this specification may be combined to be implemented or executed in a method.

Claims

1. A method for receiving downlink control information (DCI) of a user equipment (UE), the method comprising the following steps: Sending a random access preamble to a base station; Receiving, from the base station, a random access response signal for the random access preamble; Receive, in slot n of a scheduling cell, a DCI including information of a change in value for K 0min or K 2min , where the K 0min is the minimum scheduling offset limit of an application related to the minimum value of the offset between the slot for receiving the first DCI and the slot for receiving the physical downlink shared channel PDSCH scheduled by the first DCI, and the K 2min is the minimum scheduling offset limit of an application related to the minimum value of the offset between the slot for receiving the second DCI and the slot for transmitting the physical uplink shared channel PUSCH scheduled by the second DCI, and Apply the changed K starting from time slot n+X of the scheduling cell 0min or the changed K 2min value Wherein, X is determined based on the following formula: Wherein, the Y is the K value of the currently applied in the scheduled cell 0min value, the μ PDCCH is the subcarrier spacing configuration for the Physical Downlink Control Channel (PDCCH) in the scheduled cell, the μ PDSCH is the subcarrier spacing configuration for the Physical Downlink Shared Channel (PDSCH) in the scheduled cell, and the Z is a value determined by the subcarrier spacing in the scheduled cell Wherein, based on the subcarrier spacing in the scheduled cell being 15 kHz, 30 kHz, 60 kHz, 120 kHz, Z is 1, 1, 2, 2 respectively, and Wherein, based on receiving the DCI outside the first three symbols of the time slot n, after increasing Z by 1, X is determined.

2. The method according to claim 1, wherein, The time slot n includes a total of 14 symbols in the time domain.

3. The method according to claim 1, wherein The DCI is received in a symbol before the specific symbol index of the time slot n.

4. A user equipment (UE), the UE comprising: At least one transceiver configured to transmit and receive radio signals; And At least one processor connected to the at least one transceiver for operation, Wherein, the at least one processor is configured to: Send a random access preamble to a base station; Receive, from the base station, a random access response signal for the random access preamble; Receive, in slot n of a scheduling cell, downlink control information DCI including information on a change in a value for K 0min or K 2min , where the K 0min is a minimum scheduling offset limit of an application related to a minimum value of an offset between a slot for receiving a first DCI and a slot for receiving a physical downlink shared channel PDSCH scheduled by the first DCI, and the K 2min is a minimum scheduling offset limit of an application related to a minimum value of an offset between a slot for receiving a second DCI and a slot for transmitting a physical uplink shared channel PUSCH scheduled by the second DCI, and Apply the changed K starting from time slot n+X of the scheduling cell 0min or the changed K 2min value. Wherein, X is determined based on the following formula: Wherein, the Y is the K of the currently applied in the cell to be scheduled 0min value, and the μ PDCCH is the subcarrier spacing configuration for the physical downlink control channel PDCCH in the cell to be scheduled, and the μ PDSCH is the subcarrier spacing configuration for the PDSCH in the cell to be scheduled, and the Z is a value determined by the subcarrier spacing in the cell to be scheduled Wherein, based on the subcarrier spacing in the scheduled cell being 15 kHz, 30 kHz, 60 kHz, 120 kHz, Z is 1, 1, 2, 2 respectively, and Wherein, based on receiving the DCI outside the first three symbols of the time slot n, after increasing Z by 1, X is determined.

5. The UE according to claim 4, wherein, The time slot n includes a total of 14 symbols in the time domain.

6. The UE according to claim 4, wherein, The DCI is received in a symbol before the specific symbol index of the time slot n.

7. A method for a base station to send downlink control information (DCI), the method comprising the following steps: Receiving a random access preamble from a user equipment (UE); Sending, to the UE, a random access response signal for the random access preamble; Transmit downlink control information DCI including information on a change in the value of K 0min or K 2min to the UE in time slot n of the scheduling cell, where the K 0min is the minimum scheduling offset limit applied related to the minimum value of the offset between the time slot for receiving the first DCI and the time slot for receiving the physical downlink shared channel PDSCH scheduled by the first DCI, and the K 2min is the minimum scheduling offset limit applied related to the minimum value of the offset between the time slot for receiving the second DCI and the time slot for transmitting the physical uplink shared channel PUSCH scheduled by the second DCI, and Apply the changed K starting from time slot n+X of the scheduling cell 0min or the changed K 2min value to communicate with the UE Wherein, X is determined based on the following formula: Wherein, the Y is the K of the currently applied in the cell to be scheduled 0min value, and the μ PDCCH is the subcarrier spacing configuration for the physical downlink control channel PDCCH in the cell to be scheduled, and the μ PDSCH is the subcarrier spacing configuration for the PDSCH in the cell to be scheduled, and the Z is a value determined by the subcarrier spacing in the cell to be scheduled Wherein, based on the subcarrier spacing in the scheduled cell being 15 kHz, 30 kHz, 60 kHz, 120 kHz, Z is 1, 1, 2, 2 respectively, and Wherein, based on receiving the DCI outside the first three symbols of the time slot n, after increasing Z by 1, X is determined.

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