Method for Monitoring Uplink Cancellation Instruction, User Equipment, Device, Computer-Readable Storage Medium, Method for Sending Uplink Cancellation Instruction, and Base Station

Abstract

A UE may: receive configuration of a physical downlink control channel (PDCCH) monitoring occasion (MO) for UL CI reception; receive scheduling information for UL transmission; and perform or skip UL CI monitoring for UL transmission in a PDCCH MO based on the configuration and the scheduling information. Performing or skipping UL CI monitoring for UL transmission in a PDCCH MO may include: performing UL CI monitoring for UL transmission in a PDCCH MO based on the fact that the UL transmission and a reference resource region that may be indicated by a UL CI received in the PDCCH MO overlap at least in terms of time; and skipping UL CI monitoring for UL transmission in a PDCCH MO based on the fact that the reference resource region and the UL transmission do not overlap in terms of time.

Description

Technical Field

[0001] The present disclosure relates to a wireless communication system. Background Art

[0002] Various technologies such as machine-to-machine (M2M) communication, machine type communication (MTC), and various devices requiring high data throughput such as smart phones and tablet personal computers (PCs) have emerged and spread. Therefore, the amount of data throughput to be processed in a cellular network has increased rapidly. To meet such rapidly increasing data throughput, carrier aggregation technology or cognitive radio technology for efficiently adopting more frequency bands and multiple-input multiple-output (MIMO) technology or multi-base station (BS) cooperation technology for increasing data capacity transmitted on limited frequency resources have been developed.

[0003] As more and more communication devices have required greater communication capacity, enhanced mobile broadband (eMBB) communication has been required relative to traditional radio access technology (RAT). In addition, massive machine type communication (mMTC) for providing various services anytime and anywhere by connecting multiple devices and objects to each other is a major issue to be considered in next-generation communication.

[0004] The design of a communication system considering services / user equipment (UE) sensitive to reliability and latency is also under discussion. The introduction of next-generation RAT is being considered in view of eMBB communication, mMTC, ultra-reliable low-latency communication (URLLC), etc. Summary of the Invention

[0005] Technical Problem

[0006] As new radio communication technologies have been introduced, the number of UEs to which a BS should provide services within a specified resource area is increasing, and the amount of data and control information transmitted / received by the BS to / from the UEs to which it provides services is also increasing. Since the amount of resources available for the BS to communicate with UEs is limited, new methods are needed for the BS to efficiently use the limited radio resources to receive / transmit uplink / downlink data and / or uplink / downlink control information from / to UEs. In other words, due to the increase in node density and / or UE density, methods for efficiently using high-density nodes or high-density UEs for communication are needed.

[0007] Methods for efficiently supporting various services with different requirements in a wireless communication system are also needed.

[0008] Overcoming latency or delay is an important challenge for applications whose performance is sensitive to latency / delay.

[0009] The objectives to be achieved using the present disclosure are not limited to what has been particularly described above, and those skilled in the art will more clearly understand other objectives not described herein from the following detailed description.

[0010] Technical solution

[0011] One aspect of the present disclosure may provide a method for a user equipment (UE) to perform uplink cancellation indication (UL CI) monitoring. The method may include: receiving a configuration related to a physical downlink control channel (PDCCH) monitoring occasion (MO) for UL CI reception; receiving scheduling information for uplink (UL) transmission; and based on the configuration and the scheduling information, performing or skipping UL CI monitoring for the UL transmission in the PDCCH MO. Performing or skipping UL CI monitoring for the UL transmission in the PDCCH MO may include: performing UL CI monitoring for the UL transmission in the PDCCH MO based on the UL transmission overlapping at least temporally with a reference resource region to be indicated by the UL CI received in the PDCCH MO; and skipping UL CI monitoring for the UL transmission in the PDCCH MO based on the UL transmission not overlapping temporally with the reference resource region.

[0012] Another aspect of the present disclosure may provide a user equipment for performing uplink cancellation indication (UL CI) monitoring in a wireless communication system. The user equipment may include: at least one transceiver; at least one processor; and at least one computer memory operably connected to the at least one processor and storing instructions that, when executed, cause the at least one processor to perform operations. The operations may include: receiving a configuration related to a physical downlink control channel (PDCCH) monitoring occasion (MO) for UL CI reception; receiving scheduling information for uplink (UL) transmission; and based on the configuration and the scheduling information, performing or skipping UL CI monitoring for the UL transmission in the PDCCH MO. Performing or skipping UL CI monitoring for the UL transmission in the PDCCH MO may include: performing UL CI monitoring for the UL transmission in the PDCCH MO based on the UL transmission overlapping at least temporally with a reference resource region to be indicated by the UL CI received in the PDCCH MO; and skipping UL CI monitoring for the UL transmission in the PDCCH MO based on the UL transmission not overlapping temporally with the reference resource region.

[0013] Another aspect of the present disclosure may provide an apparatus for a user equipment in a wireless communication system. The apparatus may include: at least one processor; and at least one computer memory operably connected to the at least one processor and storing instructions that, when executed, cause the at least one processor to perform operations. The operations may include: receiving a configuration related to a physical downlink control channel (PDCCH) monitoring occasion (MO) for UL CI reception; receiving scheduling information for uplink (UL) transmission; and based on the configuration and the scheduling information, performing or skipping UL CI monitoring for the UL transmission in the PDCCH MO. Performing or skipping UL CI monitoring for the UL transmission in the PDCCH MO may include: performing UL CI monitoring for the UL transmission in the PDCCH MO based on the UL transmission overlapping at least temporally with a reference resource region indicated by the UL CI received in the PDCCH MO; and skipping UL CI monitoring for the UL transmission in the PDCCH MO based on the UL transmission not overlapping temporally with the reference resource region.

[0014] Another aspect of the present disclosure may provide a computer-readable storage medium. The computer-readable storage medium may store at least one computer program including instructions that, when executed by at least one processor, cause the at least one processor to perform operations for a user equipment. The operations may include: receiving a configuration related to a physical downlink control channel (PDCCH) monitoring occasion (MO) for UL CI reception; receiving scheduling information for uplink (UL) transmission; and based on the configuration and the scheduling information, performing or skipping UL CI monitoring for the UL transmission in the PDCCH MO. Performing or skipping UL CI monitoring for the UL transmission in the PDCCH MO may include: performing UL CI monitoring for the UL transmission in the PDCCH MO based on the UL transmission overlapping at least temporally with a reference resource region indicated by the UL CI received in the PDCCH MO; and skipping UL CI monitoring for the UL transmission in the PDCCH MO based on the UL transmission not overlapping temporally with the reference resource region.

[0015] Another aspect of the present disclosure may provide a method for a base station to send an uplink cancellation indication (UL CI) in a wireless communication system. The method may include: sending a configuration related to a physical downlink control channel (PDCCH) monitoring occasion (MO) for UL CI transmission; sending scheduling information for uplink (UL) transmission to a user equipment; and based on the configuration and the scheduling information, performing or skipping the transmission of the UL CI for UL transmission in the PDCCH MO. Performing or skipping the transmission of the UL CI for UL transmission may include: performing the transmission of the UL CI for UL transmission in the PDCCH MO based on the UL transmission overlapping at least in time with a reference resource region indicated by the UL CI to be sent in the PDCCH MO; and skipping the transmission of the UL CI for UL transmission in the PDCCH MO based on the UL transmission not overlapping in time with the reference resource region.

[0016] Another aspect of the present disclosure may provide a base station for sending an uplink cancellation indication (UL CI) in a wireless communication system. The BS may include: at least one transceiver; at least one processor; and at least one computer memory operably connected to the at least one processor and storing instructions that, when executed, cause the at least one processor to perform operations. The operations may include: sending a configuration related to a physical downlink control channel (PDCCH) monitoring occasion (MO) for UL CI transmission; sending scheduling information for uplink transmission (UL) to a user equipment; and based on the configuration and the scheduling information, performing or skipping the transmission of the UL CI for UL transmission in the PDCCH MO. Performing or skipping the transmission of the UL CI for UL transmission in the PDCCH MO may include: performing the transmission of the UL CI for UL transmission in the PDCCH MO based on the UL transmission overlapping at least in time with a reference resource region indicated by the UL CI to be sent in the PDCCH MO; and skipping the transmission of the UL CI for UL transmission in the PDCCH MO based on the UL transmission not overlapping in time with the reference resource region.

[0017] According to each aspect of the present disclosure, operations related to a method, a user equipment, or a computer-readable storage medium for a user equipment may further include: detecting a UL CI for UL transmission based on performing UL CI monitoring; and canceling UL transmission in a resource indicated by the UL CI among resources for UL transmission based on detecting the UL CI.

[0018] According to each aspect of the present disclosure, the reference resource region may include Y symbols in the time domain. The first symbol among the Y symbols may be the first symbol after X symbols from the end of the PDCCH MO, where X is a predefined value and Y is determined based on the configuration.

[0019] According to each aspect of the present disclosure, scheduling information is received / transmitted in the time domain before the reference resource region.

[0020] The foregoing solutions are only part of the examples of the present disclosure, and those skilled in the art can derive and understand various examples incorporating the technical features of the present disclosure from the following detailed description.

[0021] Beneficial effects

[0022] According to the implementation manners of the present disclosure, wireless communication signals can be efficiently transmitted / received. Therefore, the total throughput of the wireless communication system can be improved.

[0023] According to the implementation manners of the present disclosure, various services with different requirements can be efficiently supported in the wireless communication system.

[0024] According to the implementation manners of the present disclosure, the delay / latency generated during radio communication between communication devices can be reduced.

[0025] The effects according to the present disclosure are not limited to what has been specifically described above, and those skilled in the art related to the present disclosure will more clearly understand other effects not described herein from the following detailed description. Description of the drawings

[0026] The drawings included to provide a further understanding of the present disclosure illustrate examples of the implementation manners of the present disclosure and, together with the detailed description, are used to explain the implementation manners of the present disclosure:

[0027] Figure 1 An example of a communication system 1 to which the implementation manners of the present disclosure are applied;

[0028] Figure 2 is a block diagram illustrating an example of a communication device capable of executing the method according to the present disclosure;

[0029] Figure 3 Illustrates another example of a wireless device capable of executing the implementation manners of the present disclosure;

[0030] Figure 4 Illustrates an example of a frame structure used in a wireless communication system based on the 3rd Generation Partnership Project (3GPP);

[0031] Figure 5 Illustrates the resource grid of a time slot;

[0032] Figure 6 It shows the time slot structure used in a 3GPP-based system.

[0033] Figure 7 It shows an example of the Physical Downlink Shared Channel (PDSCH) Time Domain Resource Allocation (TDRA) caused by the Physical Downlink Control Channel (PDCCH) and an example of the Physical Uplink Shared Channel (PUSCH) TDRA caused by the PDCCH;

[0034] Figure 8 It shows the Hybrid Automatic Repeat reQuest - ACKnowledgment (HARQ-ACK) transmission / reception process;

[0035] Figure 9 It shows an example of the User Equipment (UE) operation according to some implementations of the present disclosure;

[0036] Figure 10 and Figure 11 It is a diagram for illustrating an example of the conditions for determining a valid UL CI MO;

[0037] Figure 12 It is a diagram showing the UE operation according to some implementations of the present disclosure; and

[0038] Figure 13 It shows an example of the signaling flow between the UE and the Base Station (BS) according to some implementations of the present disclosure. Detailed Implementation Modes

[0039] Hereinafter, implementations according to the present disclosure will be described in detail with reference to the accompanying drawings. The detailed description given below with reference to the accompanying drawings is intended to illustrate the exemplary implementations of the present disclosure, rather than showing the only implementations that can be implemented according to the present disclosure. The following detailed description includes specific details in order to provide a thorough understanding of the present disclosure. However, it will be apparent to those skilled in the art that the present disclosure can be practiced without these specific details.

[0040] In some cases, known structures and devices may be omitted or shown in block diagram form, so as to focus on the important features of the structures and devices, so as not to confuse the concepts of the present disclosure. The same reference numerals will be used throughout the present disclosure to refer to the same or similar parts.

[0041] The following techniques, devices, and systems can be applied to various wireless multi-access systems. The multi-access systems can include, for example, Code Division Multiple Access (CDMA) systems, Frequency Division Multiple Access (FDMA) systems, Time Division Multiple Access (TDMA) systems, Orthogonal Frequency Division Multiple Access (OFDMA) systems, Single-Carrier Frequency Division Multiple Access (SC-FDMA) systems, Multi-Carrier Frequency Division Multiple Access (MC-FDMA) systems, etc. CDMA can be implemented by radio technologies such as Universal Terrestrial Radio Access (UTRA) or CDMA2000. TDMA can be implemented by radio technologies such as Global System for Mobile Communications (GSM), General Packet Radio Service (GPRS), Enhanced Data Rates for GSM Evolution (EDGE) (i.e., GERAN), etc. OFDMA can be implemented by radio technologies such as Institute of Electrical and Electronics Engineers (IEEE) 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, Evolved UTRA (E-UTRA), etc. UTRA is part of the Universal Mobile Telecommunications System (UMTS) and the Third Generation Partnership Project (3GPP) Long-Term Evolution (LTE) is part of the Evolved UMTS using E-UTRA. 3GPP LTE employs OFDMA on the downlink (DL) and SC-FDMA on the uplink (UL). Advanced LTE (LTE-A) is an evolved version of 3GPP LTE.

[0042] For the sake of convenience in description, the description will be given under the assumption that the present disclosure is applied to LTE and / or New Radio Access Technology (NR). However, the technical features of the present disclosure are not limited thereto. For example, although the following detailed description is given based on a mobile communication system corresponding to the 3GPP LTE / NR system, the mobile communication system is applicable to any other mobile communication system except for matters specific to the 3GPP LTE / NR system.

[0043] For terms and techniques not described in detail among the terms and techniques used in the present disclosure, reference can be made to 3GPP-based standard specifications, such as 3GPP TS 36.211, 3GPP TS 36.212, 3GPP TS 36.213, 3GPP TS36.321, 3GPP TS 36.300, 3GPP TS 36.331, 3GPP TS37.213, 3GPP TS 38.211, 3GPP TS38.212, 3GPP TS 38.213, 3GPP TS 38.214, 3GPP TS 38.300, 3GPP TS 38.31, etc.

[0044] In an example of the present disclosure described later, if a device "assumes" something, this may mean that the channel transmission entity transmits the channel in accordance with the corresponding "assumption". This may also mean that the channel receiving entity receives or decodes the channel in a form that conforms to the "assumption" on the premise that the channel has been transmitted in accordance with the "assumption".

[0045] In the present disclosure, a user equipment (UE) can be fixed or mobile. Each of various devices that communicate with a base station (BS) to transmit and / or receive user data and / or control information can be a UE. The term UE can be referred to as a terminal device, a mobile station (MS), a mobile terminal (MT), a user terminal (UT), a subscriber station (SS), a wireless device, a personal digital assistant (PDA), a wireless modem, a handheld device, etc. In the present disclosure, a BS refers to a fixed station that communicates with a UE and / or another BS and exchanges data and control information with the UE and the other BS. The term BS can be referred to as an advanced base station (ABS), a Node B (NB), an evolved Node B (eNB), a base transceiver system (BTS), an access point (AP), a processing server (PS), etc. In particular, a BS of a Universal Terrestrial Radio Access (UTRAN) is referred to as an NB, a BS of an Evolved UTRAN (E-UTRAN) is referred to as an eNB, and a BS of a New Radio Access Technology network is referred to as a gNB. Hereinafter, for convenience of description, regardless of the type or version of the communication technology, an NB, an eNB, or a gNB is referred to as a BS.

[0046] In the present disclosure, a node refers to a fixed point that can transmit radio signals to a UE and / or receive radio signals from the UE through communication with the UE. Various types of BSs can be used as nodes regardless of their names. For example, a BS, an NB, an eNB, a pico eNB (PeNB), a home eNB (HeNB), a repeater, a retransmitter, etc. can be nodes. In addition, a node may not be a BS. For example, a radio remote head (RRH) or a radio remote unit (RRU) can be a node. Generally, the power levels of an RRH and an RRU are lower than that of a BS. Since an RRH or an RRU (hereinafter, RRH / RRU) is usually connected to a BS through a dedicated line such as an optical cable, cooperative communication according to the RRH / RRU and the BS can be smoothly performed relative to cooperative communication according to a BS connected through a wireless link. At least one antenna is installed per node. An antenna can refer to a physical antenna port or can refer to a virtual antenna or an antenna group. A node can also be referred to as a point.

[0047] In the present disclosure, a cell refers to a specific geographical area where one or more nodes provide communication services. Thus, in the present disclosure, communication with a specific cell may mean communication with a BS or node that provides communication services to the specific cell. The DL / UL signal of a specific cell refers to the DL / UL signal from / to the BS or node that provides communication services to the specific cell. A cell that provides UL / DL communication services to a UE is specifically referred to as a serving cell. In addition, the channel state / quality of a specific cell refers to the channel state / quality of the channel or communication link generated between the BS or node that provides communication services to the specific cell and the UE. In a 3GPP-based communication system, a UE may use a cell-specific reference signal (CRS) transmitted on a CRS resource assigned to a specific node by an antenna port of the specific node and / or a channel state information reference signal (CSI-RS) transmitted on a CSI-RS resource to measure the DL channel state from the specific node.

[0048] A 3GPP-based communication system uses the concept of a cell to manage radio resources, and the cell related to radio resources is separated from the cell of the geographical area.

[0049] The "cell" of the geographical area can be understood as the coverage area in which a node can use a carrier to provide services, and the "cell" of radio resources is associated with the bandwidth (BW), which is the frequency range configured by the carrier. Since the DL coverage area, which is the range in which a node can transmit an effective signal, and the UL coverage area, which is the range in which a node can receive an effective signal from a UE, depend on the carrier carrying the signal, the coverage area of the node can also be associated with the coverage area of the "cell" of the radio resources used by the node. Thus, the term "cell" can sometimes be used to indicate the service coverage area of a node, at other times to indicate radio resources, or at other times to indicate the range in which a signal using radio resources can reach with an effective intensity.

[0050] In the 3GPP communication standard, the concept of a cell is used to manage radio resources. A "cell" associated with radio resources is defined by a combination of DL resources and UL resources (i.e., a combination of a DL component carrier (CC) and a UL CC). A cell can be configured by only DL resources or by a combination of DL resources and UL resources. If carrier aggregation is supported, the link between the carrier frequencies of the DL resources (or DL CCs) and the carrier frequencies of the UL resources (or UL CCs) can be indicated by system information. For example, the combination of DL resources and UL resources can be indicated by a link in System Information Block Type 2 (SIB2). In this case, the carrier frequencies can be equal to or different from the center frequencies of each cell or CC. When carrier aggregation (CA) is configured, the UE has only one Radio Resource Control (RRC) connection with the network. During RRC connection establishment / re-establishment / handoff, one serving cell provides non-access stratum (NAS) mobility information. During RRC connection re-establishment / handoff, one serving cell provides security inputs. This cell is called the primary cell (Pcell). The Pcell refers to the cell operating on the primary frequency on which the UE performs the initial connection establishment process or initiates the connection re-establishment process. Depending on the UE capabilities, secondary cells (Scells) can be configured to form a set of serving cells together with the Pcell. Scells can be configured after the completion of RRC connection establishment and are used to provide additional radio resources in addition to the resources of a specific cell (SpCell). The carrier corresponding to the Pcell on the DL is called the downlink primary CC (DL PCC), while the carrier corresponding to the Pcell on the UL is called the uplink primary CC (UL PCC). The carrier corresponding to the Scell on the DL is called the downlink secondary CC (DL SCC), while the carrier corresponding to the Scell on the UL is called the uplink secondary CC (UL SCC).

[0051] For dual connectivity (DC) operation, the term SpCell refers to the Pcell of the master cell group (MCG) or the Pcell of the secondary cell group (SCG). The SpCell supports PUCCH transmission and contention-based random access and is always active. The MCG is a set of serving cells associated with the master node (e.g., BS) and includes the SpCell (Pcell) and optionally one or more Scells. For a UE configured with DC, the SCG is a subset of serving cells associated with the secondary node and includes the PSCell and zero or more Scells. For a UE in the RRC_CONNECTED state that is not configured with CA or DC, there is only one serving cell that includes only the Pcell. For a UE in the RRC_CONNECTED state configured with CA or DC, the term serving cell refers to the set of cells that includes the SpCell and all Scells. In DC, two media access control (MAC) entities are configured for the UE, namely, one MAC entity for the MCG and one MAC entity for the SCG.

[0052] A UE configured with CA but not configured with DC can be configured with a Pcell PUCCH group that includes the Pcell and zero or more Scells, and an Scell PUCCH group that includes only Scells. For an Scell, an Scell (hereinafter, PUCCH cell) on which to transmit the PUCCH associated with the corresponding cell can be configured. An Scell indicated as a PUCCH Scell belongs to the Scell PUCCH group and performs PUCCH transmission of the relevant UCI on the PUCCH Scell. An Scell that is not indicated as a PUCCH Scell or in which it is indicated for PUCCH transmission and that is not the Pcell belongs to the Pcell PUCCH group and performs PUCCH transmission of the relevant UCI on the Pcell.

[0053] In a wireless communication system, the UE receives information about the DL from the BS and the UE sends information about the UL to the BS. The information transmitted and / or received by the BS and the UE includes data and various control information, and there are various physical channels according to the type / use of the information transmitted and / or received by the UE and the BS.

[0054] Based on the 3GPP communication standard, define a DL physical channel corresponding to a resource element carrying information from a higher layer, and a DL physical signal corresponding to a resource element used by the physical layer but not carrying information from a higher layer. For example, the Physical Downlink Shared Channel (PDSCH), Physical Broadcast Channel (PBCH), Physical Multicast Channel (PMCH), Physical Control Format Indicator Channel (PCFICH), Physical Downlink Control Channel (PDCCH), etc. are defined as DL physical channels, while the Reference Signal (RS) and Synchronization Signal (SS) are defined as DL physical signals. The RS, also known as a pilot, represents a signal with a predefined special waveform known to both the BS and the UE. For example, the Demodulation Reference Signal (DMRS), Channel State Information RS (CSI-RS), etc. are defined as DL RS. Based on the 3GPP communication standard, define a UL physical channel corresponding to a resource element carrying information from a higher layer, and a UL physical signal corresponding to a resource element used by the physical layer but not carrying information from a higher layer. For example, the Physical Uplink Shared Channel (PUSCH), Physical Uplink Control Channel (PUCCH), and Physical Random Access Channel (PRACH) are defined as UL physical channels, and the DMRS for UL control / data signals, the Sounding Reference Signal (SRS) for UL channel measurement, etc. are defined.

[0055] In the present disclosure, the PDCCH refers to a set of time-frequency resources (e.g., resource elements) carrying Downlink Control Information (DCI), and the PDSCH refers to a set of time-frequency resources carrying DL data. The PUCCH, PUSCH, and PRACH respectively refer to sets of time-frequency resources carrying Uplink Control Information (UCI), UL data, and random access signals. In the following description, the meaning of "UE transmits / receives PUCCH / PUSCH / PRACH" is that the UE transmits / receives UCI / UL data / random access signals on or through the PUCCH / PUSCH / PRACH respectively. Additionally, the meaning of "BS transmits / receives PBCH / PDCCH / PDSCH" is that the BS transmits broadcast information / DCI / DL data on or through the PBCH / PDCCH / PDSCH respectively.

[0056] In the present disclosure, the radio resources (e.g., time-frequency resources) scheduled or configured by the BS for the UE to transmit or receive PUCCH / PUSCH / PDSCH are also referred to as PUCCH / PUSCH / PDSCH resources.

[0057] As more and more communication devices require greater communication capacity, enhanced mobile broadband (eMBB) communication is needed as compared to traditional radio access technologies (RATs). In addition, massive machine type communication (mMTC) for providing various services anytime and anywhere by connecting multiple devices and objects to each other is a major issue to be considered in next-generation communication. Furthermore, the design of communication systems for services / UEs that are sensitive to reliability and latency is also under discussion. The introduction of next-generation RATs is being considered in view of eMBB communication, mMTC, ultra-reliable low-latency communication (URLLC), etc. Currently, in 3GPP, research is being conducted on the next-generation mobile communication system after EPC. In the present disclosure, for convenience, the corresponding technology is referred to as new RAT (NR) or fifth-generation (5G) RAT, and a system using NR or supporting NR is referred to as an NR system.

[0058] Figure 1 FIG. shows an example of a communication system 1 implementing an embodiment of the present disclosure. Refer to Figure 1 , the communication system 1 applied to the present disclosure includes a wireless device, a BS, and a network. Here, the wireless device represents a device that performs communication using a RAT (e.g., 5G NR or LTE (e.g., E-UTRA)) and can be referred to as a communication / radio / 5G device. The wireless device may include, but is not limited to, a robot 100a, vehicles 100b-1 and 100b-2, an extended reality (XR) device 100c, a handheld device 100d, a household appliance 100e, an Internet of Things (IoT) device 100f, and an artificial intelligence (AI) device / server 400. For example, the vehicle may include a vehicle having a wireless communication function, an autonomous driving vehicle, and a vehicle capable of performing vehicle-to-vehicle communication. Here, 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) mounted in a vehicle, a TV, a smart phone, a computer, a wearable device, a household appliance device, a digital sign, a vehicle, a robot, etc. The handheld device may include a smart phone, a smart board, a wearable device (e.g., a smart watch or smart glasses), and a computer (e.g., a laptop). The household appliance may include a TV, a refrigerator, and a washing machine. The IoT device may include a sensor and a smart meter. For example, the BS and the network may also be implemented as wireless devices, and a specific wireless may operate as a BS / network node with respect to another wireless device.

[0059] Wireless devices 100a to 100f can be connected to network 300 via BS 200. 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 BS 200 / 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). IoT devices (e.g., sensors) can perform direct communication with other IoT devices (e.g., sensors) or other wireless devices 100a to 100f.

[0060] Wireless communications / connections 150a and 150b can be established between wireless devices 100a to 100f and BS 200 and between wireless devices 100a to 100f. Here, wireless communications / connections such as UL / DL communication 150a and sidelink communication 150b (or device-to-device (D2D) communication) can be established by various RATs (e.g., 5G NR). The wireless devices and the BS / wireless devices can send / receive radio signals to / from each other via wireless communications / connections 150a and 150b. To this end, 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 sending / receiving radio signals can be performed based on various proposals of the present disclosure.

[0061] Figure 2 is a block diagram illustrating an example of a communication device capable of performing the method according to the present disclosure. Refer to Figure 2 , the first wireless device 100 and the second wireless device 200 can send and / or receive radio signals via various RATs (e.g., LTE and NR). Here, {the first wireless device 100 and the second wireless device 200} can correspond to Figure 1 {wireless device 100x and BS200} and / or {wireless device 100x and wireless device 100x} of

[0062] The first wireless device 100 may include one or more processors 102 and one or more memories 104 and additionally may also include one or more transceivers 106 and / or one or more antennas 108. The processor 102 may control the memory 104 and / or the transceiver 106 and may be configured to implement the functions, processes, and / or methods described / stated below. For example, the processor 102 may process the information within the memory 104 to generate a first information / signal and then transmit a radio signal including the first information / signal via the transceiver 106. The processor 102 may receive a radio signal including a second information / signal via the transceiver 106 and then store the information obtained by processing the second information / signal in the memory 104. The memory 104 may be connected to the processor 102 and may store various information related to the operation of the processor 102. For example, the memory 104 may execute a part or all of the processes controlled by the processor 102 or store software code including instructions for performing the processes and / or methods described / stated below. Here, the processor 102 and the memory 104 may be part of a communication modem / circuit / chip designed to implement a RAT (e.g., LTE or NR). The transceiver 106 may be connected to the processor 102 and transmit and / or receive radio signals via one or more antennas 108. Each of the transceivers 106 may include a transmitter and / or a receiver. The transceiver 106 is used interchangeably with the radio frequency (RF) unit. In the present disclosure, the wireless device may represent a communication modem / circuit / chip.

[0063] The second wireless device 200 may include one or more processors 202 and one or more memories 204 and additionally may also include one or more transceivers 206 and / or one or more antennas 208. The processor 202 may control the memory 204 and / or the transceiver 206 and may be configured to implement the functions, processes, and / or methods described / stated below. For example, the processor 202 may process information within the memory 204 to generate third information / signals, and then transmit radio signals including the third information / signals via the transceiver 206. The processor 202 may receive radio signals including fourth information / signals via the transceiver 106, and then store the information obtained by processing the fourth information / signals in the memory 204. The memory 204 may be connected to the processor 202 and may store various information related to the operation of the processor 202. For example, the memory 204 may execute part or all of the processes controlled by the processor 202 or store software code including instructions for performing the processes and / or methods described / stated below. Here, the processor 202 and the memory 204 may be part of a communication modem / circuit / chip designed to implement a RAT (e.g., LTE or NR). The transceiver 206 may be connected to the processor 202 and transmit and / or receive radio signals via one or more antennas 208. Each of the transceivers 206 may include a transmitter and / or a receiver. The transceiver 206 is used interchangeably with the RF unit. In the present disclosure, the wireless device may represent a communication modem / circuit / chip.

[0064] The wireless communication technologies implemented in the wireless devices 100 and 200 of the present disclosure may include narrowband Internet of Things for low-power communication as well as LTE, NR, and 6G communication. For example, the NB-IoT technology may be an example of a low-power wide area network (LPWAN) technology and may be implemented by standards such as LTE Cat NB1 and / or LTE Cat NB2, but is not limited to these standards. Additionally or alternatively, the wireless communication technologies implemented in the wireless devices XXX and YYY of the present disclosure may perform communication based on the LTE-M technology. For example, the LTE-M technology may be an example of an 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 by at least one of various standards such as the following, but is not limited to these standards: 1) LTE CAT 0, 2) LTE Cat M1, 3) LTE Cat M2, 4) LTE non-BL (non-bandwidth limited), 5) LTE-MTC, 6) LTE machine type communication, and / or 7) LTE M. Additionally or alternatively, the wireless communication technologies implemented in the wireless devices XXX and YYY of the present disclosure may include, but are not limited to, at least one of ZigBee, Bluetooth, and low-power wide area network (LPWAN) that consider low-power communication. For example, the ZigBee technology may create a personal area network (PAN) 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.

[0065] In the following, the hardware components of wireless devices 100 and 200 will be described in more detail. One or more protocol layers can be implemented by, but not limited to, one or more processors 102 and 202. For example, one or more processors 102 and 202 can implement one or more layers (e.g., functional layers such as a Physical (PHY) layer, a Media Access Control (MAC) layer, a Radio Link Control (RLC) layer, a Packet Data Convergence Protocol (PDCP) layer, a Radio Resource Control (RRC) layer, and a Service Data Adaptation Protocol (SDAP) layer). One or more processors 102 and 202 can generate one or more protocol data units (PDUs) and / or one or more service data units (SDUs) according to the functions, procedures, proposals, and / or methods disclosed in this document. One or more processors 102 and 202 can generate messages, control information, data, or information according to the functions, procedures, proposals, and / or methods disclosed in this document. One or more processors 102 and 202 can generate signals (e.g., baseband signals) including PDUs, SDUs, messages, control information, data, or information according to the functions, procedures, proposals, and / or methods disclosed in this document and provide the generated signals to one or more transceivers 106 and 206. One or more processors 102 and 202 can receive signals (e.g., baseband signals) from one or more transceivers 106 and 206 and obtain PDUs, SDUs, messages, control information, data, or information according to the functions, procedures, proposals, and / or methods disclosed in this document.

[0066] One or more processors 102 and 202 can be referred to as a controller, a microcontroller, a microprocessor, or a microcomputer. One or more processors 102 and 202 can be implemented by hardware, firmware, software, or a combination thereof. As an example, one or more application-specific integrated circuits (ASICs), one or more digital signal processors (DSPs), one or more digital signal processor devices (DSPDs), one or more programmable logic devices (PLDs), or one or more field-programmable gate arrays (FPGAs) can be included in one or more processors 102 and 202. The functions, procedures, proposals, and / or methods disclosed in this document can be implemented using firmware or software, and the firmware or software can be configured to include modules, procedures, or functions. The firmware or software configured to execute the functions, procedures, proposals, and / or methods disclosed in this document can be included in one or more processors 102 and 202 or stored in one or more memories 104 and 204 for driving by one or more processors 102 and 202. The functions, procedures, proposals, and / or methods disclosed in this document can be implemented using firmware or software in the form of code, commands, and / or command sets.

[0067] One or more memories 104 and 204 may be connected to one or more processors 102 and 202 and store various types of data, signals, messages, information, programs, code, commands, and / or instructions. One or more memories 104 and 204 may be configured by the following: read-only memory (ROM), random access memory (RAM), electrically erasable programmable read-only memory (EPROM), flash memory, hard disk drive, register, cache memory, computer-readable storage medium, and / or a combination thereof. One or more memories 104 and 204 may be located inside and / or outside one or more processors 102 and 202. One or more memories 104 and 204 may be connected to one or more processors 102 and 202 by various technologies such as wired or wireless connections.

[0068] One or more transceivers 106 and 206 may transmit user data, control information, and / or radio signals / channels mentioned in the methods and / or operational flowcharts of this document to one or more other devices. One or more transceivers 106 and 206 may receive user data, control information, and / or radio signals / channels mentioned in the functions, processes, proposals, methods, and / or operational flowcharts disclosed in this document from one or more other devices. For example, one or more transceivers 106 and 206 may be connected to one or more processors 102 and 202 and transmit and receive radio signals. For example, one or more processors 102 and 202 may execute control such that one or more transceivers 106 and 206 may send user data, control information, or radio signals to one or more other devices. One or more processors 102 and 202 may execute control such that one or more transceivers 106 and 206 may receive user data, control information, or radio signals from one or more other devices. One or more transceivers 106 and 206 may be connected to one or more antennas 108 and 208. One or more transceivers 106 and 206 may be configured to transmit and receive user data, control information, and / or radio signals / channels mentioned in the functions, programs, proposals, methods, and / or operational flowcharts disclosed in this document via one or more antennas 108 and 208. In this document, one or more antennas may be multiple physical antennas or multiple logical antennas (e.g., antenna ports). One or more transceivers 106 and 206 may convert received radio signals / channels, etc. from RF band signals into baseband signals for processing received user data, control information, radio signals / channels, etc. using one or more processors 102 and 202. One or more transceivers 106 and 206 may convert user data, control information, radio signals / channels, etc. processed using one or more processors 102 and 202 from baseband signals into RF band signals. To this end, one or more transceivers 106 and 206 may include (analog) oscillators and / or filters.

[0069] Figure 3 Another example of a wireless device capable of implementing the implementations of the present disclosure is illustrated. Refer to Figure 3 , the wireless devices 100 and 200 may correspond to Figure 2 the wireless devices 100 and 200 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 memory unit 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 Figure 2one or more processors 102 and 202 and / or one or more memories 104 and 204. For example, transceiver 114 may include Figure 2 one or more transceivers 106 and 206 and / or one or more antennas 108 and 208. Control unit 120 is electrically connected to communication unit 110, memory 130, and additional components 140 and controls the overall operation of the wireless device. For example, control unit 120 may control the electrical / mechanical operations of the wireless device based on programs / codes / commands / information stored in memory unit 130. Control unit 120 may send the information stored in memory unit 130 to the outside (e.g., other communication devices) via communication unit 110 through a wireless / wired interface or store the information received from the outside (e.g., other communication devices) via communication unit 110 through a wireless / wired interface in memory unit 130.

[0070] Additional components 140 may be configured differently according to the type of wireless device. For example, additional components 140 may 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 may be implemented in the form of, 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 in), a BS ( Figure 1 200), a network node, etc. The wireless device may be used in a mobile or fixed location according to the use case / service.

[0071] In Figure 3Among them, all kinds of 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 connected wirelessly 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 wires, and the control unit 120 and the first unit (e.g., 130 and 140) can be connected wirelessly through the communication unit 110. Each component, unit / part, and / or module within the wireless devices 100 and 200 can also include one or more elements. For example, the control unit 120 can be configured by a set of one or more processors. As an 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. As 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.

[0072] In the present disclosure, at least one memory (e.g., 104 or 204) can store instructions or programs, which when executed, cause at least one processor operatively coupled to the at least one memory to perform operations according to some embodiments or implementations of the present disclosure.

[0073] In the present disclosure, a computer-readable storage medium can store at least one instruction or computer program, which when executed by at least one processor, causes the at least one processor to perform operations according to some embodiments or implementations of the present disclosure.

[0074] In the present disclosure, a processing device or apparatus can include at least one processor and at least one computer memory coupled to the at least one processor. The at least one computer memory can store instructions or programs, which when executed, cause at least one processor operatively coupled to the at least one memory to perform operations according to some embodiments or implementations of the present disclosure.

[0075] In the present disclosure, a communication device or apparatus can include: at least one processor; and at least one computer memory operatively connected to the at least one processor and configured to store instructions, which when executed, cause the at least one processor to perform operations according to examples of the present disclosure.

[0076] Figure 4 The figure illustrates an example of a frame structure used in a 3GPP-based wireless communication system.

[0077] Figure 4The frame structure is purely exemplary, and the number of sub - frames, time slots, and symbols in a frame can be variably changed. In the NR system, different sets of OFDM parameters (e.g., sub - carrier spacing (SCS)) can be configured for multiple cells aggregated for a UE. Thus, the (absolute - time) duration of time resources (e.g., sub - frames, time slots, or transmission time intervals (TTI)) including the same number of symbols can be configured differently for the aggregated cells. Here, a symbol can include an OFDM symbol (or cyclic - prefix - OFDM (CP - OFDM) symbol) and an SC - FDMA symbol (or discrete - Fourier - transform - spread - OFDM (DFT - s - OFDM) symbol). In the present disclosure, symbols, OFDM - based symbols, OFDM symbols, CP - OFDM symbols, and DFT - s - OFDM symbols are used interchangeably.

[0078] Reference Figure 4 , in the NR system, UL and DL transmissions are organized into frames. The duration of each frame is T f =(Δf max *N f / 100)*T c = 10 ms and is divided into two half - frames each having a duration of 5 ms. Here, the basic time unit of NR is T c = 1 / (Δf max *N f ), where f max = 480*10 3 Hz and N f = 4096. As a reference, the basic time unit of LTE is T s = 1 / (Δf ref *N f,ref ), where Δf ref = 15*10 3 Hz and N f,ref = 2048. T c and T f have the following relationship: the constant κ = T c / T f = 64. Each half - frame includes 5 sub - frames and the duration T sf of a single sub - frame is 1 ms. A sub - frame is further divided into time slots and the number of time slots in a sub - frame depends on the sub - carrier spacing. Each time slot includes 14 or 12 OFDM symbols based on the cyclic prefix. In normal CP, each time slot includes 14 OFDM symbols, while in extended CP, each time slot includes 12 OFDM symbols. The parameter set depends on the exponentially scalable sub - carrier spacing Δf = 2 u *15 kHz. The following table shows the number of OFDM symbols per time slot (N slotsymb ) The number of time slots per frame (N frame,u slot ) and the number of time slots per subframe (N subframe，u slot ).

[0079] [Table 1]

[0080] u <![CDATA[N slot symb > <![CDATA[N frame，u slot > <![CDATA[N subframe，u slot > 0 14 10 1 1 14 20 2 2 14 40 4 3 14 80 8 4 14 160 16

[0081] The following table shows the number of OFDM symbols per time slot, the number of time slots per frame, and the number of time slots per subframe for a subcarrier spacing Δf = 2 u *15 kHz.

[0082] [Table 2]

[0083] u <![CDATA[N slot symb > <![CDATA[N frame，u slot > <![CDATA[N subframe，u slot > 2 12 40 4

[0084] For a search space configuration u, the time slots are numbered in ascending order as n u s ∈ {0,..., n subframe，u slot -1} within a subframe, and as n u s.f ∈ {0,..., n frame，u slot -1} within a frame.

[0085] Figure 5 The resource grid of the illustrated time slot is shown. The time slot includes a plurality (e.g., 14 or 12) of symbols in the time domain. For each parameter set (e.g., subcarrier spacing) and carrier, starting from the common resource block (CRB) N start，u grid indicated by higher layer signaling (e.g., RRC signaling), a resource grid of N size，u grid，x *N RB sc subcarriers and N subframe，u symb symbols is defined, where N size，u grid，x is the number of resource blocks (RBs) in the resource grid, and the subscript x is DL for the downlink and UL for the uplink. N RB sc is the number of subcarriers per RB. In a 3GPP-based wireless communication system, N RB sc is typically 12. For a given antenna port p, subcarrier spacing configuration u, and transmission link (DL or UL), there is a resource grid. The carrier bandwidth N size，ugrid Given to the UE by higher layer parameters (e.g., RRC parameters). Each element in the resource grid for antenna port p and subcarrier spacing configuration u is called a resource element (RE), and a complex symbol can be mapped to each RE. Each RE in the resource grid is uniquely identified by an index k in the frequency domain and an index l in the time domain representing the symbol position relative to a reference point. In the NR system, one RB is defined by 12 consecutive subcarriers in the frequency domain. In the NR system, RBs are classified into common resource blocks (CRBs) and physical resource blocks (PRBs). For subcarrier spacing configuration u, the CRBs are numbered upward from 0 in the frequency domain. The center of subcarrier 0 of CRB 0 for subcarrier spacing configuration u is equal to "Point A" which serves as the common reference point for the RB grid. The PRBs for subcarrier spacing configuration u are defined within a bandwidth part (BWP) and are numbered from 0 to N size,u BWP,i -1, where i is the number of the BWP. The PRB n in BWP i PRB is related to the CRB n u CRB by: n u PRB = n u CRB + N size,u BWP,i where N size BWP,i is the CRB at which the BWP starts relative to CRB 0. A BWP includes a plurality of consecutive RBs in the frequency domain. For example, a BWP is a subset of consecutive CRBs defined for a given parameter set u in BWP i on a given carrier i . A carrier may include up to N (e.g., 5) BWPs. The UE may be configured to have one or more BWPs on a given component carrier. Data communication is performed via the active BWP, and only a predetermined number of BWPs (e.g., one BWP) among the BWPs configured for the UE can be active on the component carrier.

[0086] For each serving cell in the set of DL BWPs or UL BWPs, the network configures at least an initial DL BWP and one (when the serving cell is configured with uplink) or two (when supplementary uplink is used) initial UL BWPs. The network may configure additional UL BWPs and DL BWPs for the serving cell. For each DL BWP or UL BWP, the UE is provided with the following parameters for the serving cell: O provided by the RRC parameter offsetToCarrier carrier , for CRB N start BWP = O carrier + RB start ; the number N of consecutive RBssize BWP = L RB ; and by assuming based on i) subcarrier spacing, ii) cyclic prefix, iii) N start BWP = 275 to offset the resource block (RB) set and length L RB The subcarrier spacing provided by the RRC parameter locationAndBandwidth indicated as the resource indicator value (RIV); the index in the set of DL BWPs or UL BWPs; the set of BWP common parameters; and the set of BWP-only parameters.

[0087] The virtual resource block (VRB) is defined within the BWP and numbered from 0 to N size,u BWP,i - 1, where i is the number of the BWP. The VRB is mapped to the physical resource block (PRB) according to non-interleaved mapping. In some implementations, in the non-interleaved VRB-to-PRB mapping, VRB n can be mapped to PRB n.

[0088] Figure 6 is a diagram illustrating an exemplary time slot structure that can be used in a 3GPP-based system. In each 3GPP-based system such as an NR system, each time slot can have a self-contained structure, having: i) a DL control channel, ii) DL or UL data and / or iii) a UL control channel. For example, the first N symbols of the time slot can be used to deliver the DL control channel (hereinafter referred to as the DL control region), while the last M symbols of the time slot can be used to deliver the UL control channel (hereinafter referred to as the UL control region). N and M are each 0 or a positive integer. Each of N and M is 0 or a positive integer. The resource region between the DL control region and the UL control region (hereinafter referred to as the data region) can be used to deliver DL data or UL data. The symbols of a single time slot can be divided into groups of consecutive symbols that can be used as DL symbols, UL symbols, or flexible symbols. Hereinafter, the information specifying the usage of the symbols in a time slot is referred to as the time slot format. For example, the time slot format can define which symbols will be used for UL and which symbols will be used for DL.

[0089] When the serving cell will operate in TDD mode, the BS can configure the UL and DL allocation patterns for the serving cell via higher layer signaling (e.g., RRC signaling). For example, the following parameters can be used to configure the TDD DL-UL pattern:

[0090] - dl-UL-TransmissionPeriodicity, indicating the period of the DL-UL pattern;

[0091] - nrofDownlinkSlots, which indicates the number of consecutive complete DL time slots at the start of each DL-UL pattern, where a complete DL time slot is a time slot that includes only DL symbols;

[0092] - nrofDownlinkSymbols, which indicates the number of consecutive DL symbols at the start of the time slot immediately following the last complete DL time slot;

[0093] - nrofUplinkSlots, which indicates the number of consecutive complete UL time slots at the end of each DL-UL pattern, where a complete UL time slot is a time slot that includes only UL symbols; and

[0094] - nrofUplinkSymbols, which indicates the number of consecutive UL symbols at the end of the time slot before the first complete UL time slot.

[0095] The remaining symbols that are neither configured as DL nor configured as UL among the symbols of the DL-UL pattern are flexible symbols.

[0096] When receiving the configuration of the TDD DL-UL pattern, i.e., the TDD UL-DL configuration (e.g., tdd-UL-DL-ConfigurationCommon or tdd-UL-DLConfigurationDedicated), via higher layer signaling, the UE sets the time slot format for each time slot across time slots.

[0097] Although various combinations can be generated from DL symbols, UL symbols, and flexible symbols, a specific number of combinations can be predefined as time slot formats, and the predefined time slot formats can be identified by a time slot format index. Some of the predefined time slot formats are listed in the following table. In the table, D represents DL symbols, U represents UL symbols, and F represents flexible symbols.

[0098] [Table 3]

[0099]

[0100] To indicate which of the predefined slot formats is to be used for a specific time slot, the BS may configure, via higher layer signaling (e.g., RRC signaling), a set of slot format combinations available for each serving cell in a serving cell set, and configure the UE to monitor, via higher layer signaling (e.g., RRC signaling), the group common PDCCH for the slot format indicator (SFI). The DCI carried on the group common PDCCH for SFI is referred to as SFI DCI. DCI format 2_0 is used for SFI DCI. For example, for each serving cell in a serving cell set, the BS may provide the UE with the (starting) position of the slot format combination ID (i.e., SFI-index) for the serving cell, the set of slot format combinations applicable to the serving cell, and the reference SCS configuration for each slot format in the slot format combination indicated by the SFI-index value in the SFI DCI. For each slot format combination in the set of slot format combinations, one or more slot formats are configured and a slot format combination ID (i.e., SFI-index) is assigned. For example, when the BS configures a slot format combination with N slot formats, the BS may indicate N slot format indices in the slot format indices of the predefined slot formats (e.g., referring to Table 3) for the slot format combination. To configure the UE to monitor the group common PDCCH for SFI, the BS indicates to the UE the SFI-RNTI corresponding to the radio network temporary identifier (RNTI) for SFI and the total length of the DCI payload scrambled with the SFI-RNTI. When a PDCCH is detected based on the SFI-RNTI, the UE may determine the slot format for the corresponding serving cell according to the SFI-index for the serving cell among the SFI-indices in the DCI payload of the PDCCH.

[0101] Symbols indicated as flexible by the TDD DL-UL pattern configuration may be indicated as UL, DL, or flexible via the SFI DCI. Symbols indicated as DL / UL by the TDD DL-UL pattern configuration are not overloaded as UL / DL or flexible via the SFI DCI.

[0102] When the UE is not configured with a TDD DL-UL pattern, the UE determines for each time slot whether the time slot is for UL or DL, and determines the symbol allocation in the time slot based on the SFI DCI and / or DCI (e.g., DCI format 1_0, DCI format 1_1, DCI format 1_2, DCI format 0_0, DCI format 0_1, DCI format 0_2, and DCI format 2_3) that schedules or triggers the DL or UL signal transmission.

[0103] A UE configured with carrier aggregation can be configured to use one or more cells. If the UE is configured with multiple serving cells, the UE can be configured with one or more cell groups. The UE can also be configured with multiple cell groups associated with different BSs. Alternatively, the UE can be configured with multiple cell groups associated with a single BS. Each cell group of the UE includes one or more serving cells and includes a single PUCCH cell for which PUCCH resources are configured. The PUCCH cell can be the Pcell or an Scell configured as the PUCCH cell among the Scells of the corresponding cell group. Each serving cell of the UE belongs to one of the cell groups of the UE and not to multiple cells.

[0104] NR frequency bands are defined as two types of frequency ranges, FR1 and FR2, and FR2 is also referred to as millimeter wave (mmW). The following table shows the frequency ranges in which NR operates.

[0105] [Table 4]

[0106] Frequency range specification Corresponding frequency range Subcarrier spacing FR1 410 MHz–7125 MHz 15, 30, 60 kHz FR2 24250 MHz–52600 MHz 60, 120, 240 kHz

[0107] Hereinafter, physical channels that can be used in a 3GPP-based wireless communication system will be described in detail.

[0108] The PDCCH carries DCI. For example, the PDCCH (i.e., DCI) carries information about the transmission format and resource allocation of the downlink shared channel (DL-SCH), information about the resource allocation of the uplink shared channel (UL-SCH), paging information about the paging channel (PCH), system information about the DL-SCH, information about the resource allocation of control messages for layers located higher than the physical layer in the protocol stack of the UE / BS (hereinafter, higher layers) (such as the random access response (RAR) sent on the PDSCH), transmit power control commands, information about the activation / release of configured scheduling (CS), etc. The DCI containing DL-SCH resource allocation information is called PDSCH scheduling DCI, and the DCI containing UL-SCH resource allocation information is called PUSCH scheduling DCI. The DCI includes a cyclic redundancy check (CRC). The CRC is masked / scrambled with various identifiers (e.g., radio network temporary identifier (RNTI)) according to the owner or usage of the PDCCH. For example, if the PDCCH is for a specific UE, the CRS is masked with the UE identifier (e.g., cell-RNTI (C-RNTI)). If the PDCCH is for a paging message, the CRC is masked with the paging RNTI (P-RNTI). If the PDCCH is for system information (e.g., system information block (SIB)), the CRC is masked with the system information RNTI (SI-RNTI). If the PDCCH is for a random access response, the CRC is masked with the random access-RNTI (RA-RNTI).

[0109] When the PDCCH on one serving cell schedules the PDSCH or PUSCH on another serving cell, this is called cross-carrier scheduling. Cross-carrier scheduling with a carrier indicator field (CIF) can allow the PDCCH on a serving cell to schedule resources on another serving cell. When the PDSCH on a serving cell schedules the PDSCH or PUSCH on that serving cell, this is called self-carrier scheduling. When cross-carrier scheduling is used in a cell, the BS can provide the UE with information about the cell that schedules that cell. For example, the BS can notify the UE whether the serving cell is scheduled by the PDCCH on another (scheduling) cell or by that serving cell. If the serving cell is scheduled by another (scheduling) cell, the BS can notify the UE which cells signal the DL assignment and UL grant for the serving cell. In the present disclosure, the cell carrying the PDCCH is called the scheduling cell, and the cell in which the transmission of the PUSCH or PDSCH is scheduled by the DCI included in the PDCCH, i.e., the cell carrying the PUSCH or PDSCH scheduled by the PDCCH, is called the scheduled cell.

[0110] The PDSCH is a physical layer UL channel for UL data transmission. The PDSCH carries DL data (e.g., DL-SCH transport blocks) and undergoes modulation, such as quadrature phase shift keying (QPSK), 16-quadrature amplitude modulation (QAM), 64QAM, 256QAM, etc. Codewords are generated by encoding transport blocks (TBs). The PDSCH can carry up to two codewords. Scrambling and modulation mapping can be performed per codeword, and the modulation symbols generated from each codeword can be mapped to one or more layers. Each layer is mapped to radio resources together with DMRS and generated as an OFDM symbol signal. Then, the OFDM symbol signal is transmitted by the corresponding antenna port.

[0111] The PUCCH refers to a physical layer UL channel for UCI transmission. The PUCCH carries UCI. The UCI includes the following information.

[0112] - Scheduling Request (SR): Information for requesting UL-SCH resources.

[0113] - Hybrid Automatic Repeat Request (HARQ)-Acknowledgment (ACK): Response to DL data packets (e.g., codewords) on the PDSCH. The HARQ-ACK indicates whether the DL data packet has been successfully received by the communication device. In response to a single codeword, 1-bit HARQ-ACK can be sent. In response to two codewords, 2-bit HARQ-ACK can be sent. The HARQ-ACK response includes positive ACK (simply referred to as ACK), negative ACK (NACK), discontinuous transmission (DTX), or NACK / DTX. Here, the term HARQ-ACK is used interchangeably with HARQ ACK / NACK, ACK / NACK, or A / N.

[0114] - Channel State Information (CSI): Feedback information about the DL channel. The CSI can include Channel Quality Information (CQI), Rank Indicator (RI), Precoding Matrix Indicator (PMI), CSI-RS Resource Indicator (CSI), SS / PBCH Resource Block Indicator (SSBRI), and Layer Indicator (L1). The CSI can be classified into CSI Part 1 and CSI Part 2 according to the UCI type included in the CSI. For example, the CRI, RI, and / or CQI of the first codeword can be included in CSI Part 1, and the LI, PMI, and / or CQI of the second codeword can be included in CSI Part 2.

[0115] In this disclosure, for convenience, the PUCCH resources configured / indicated by the BS for / from the UE for HARQ-ACK, SR, and CSI transmission are referred to as HARQ-ACK PUCCH resources, SR PUCCH resources, and CSI PUCCH resources.

[0116] The PUCCH format can be defined as follows according to the UCI payload size and / or the transmission length (e.g., the number of symbols included in the PUCCH resource). Regarding the PUCCH format, Table 5 can also be referred to.

[0117] (0) PUCCH format 0 (PF0 or F0)

[0118] - Supported UCI payload size: up to K bits (e.g., K = 2)

[0119] - Number of OFDM symbols constituting a single PUCCH: 1 to X symbols (e.g., X = 2)

[0120] - Transmission structure: Only the UCI signal without DMRS is included in PUCCH format 0. The UE sends the UCI status by selecting and sending one of multiple sequences. For example, the UE sends a specific UCI to the BS by sending one of multiple sequences via the PUCCH that is PUCCH format 0. The UE sends the PUCCH that is PUCCH format 0 only in the PUCCH resource for the corresponding SR configuration when sending a positive SR.

[0121] - The configuration for PUCCH format 0 includes the following parameters for the corresponding PUCCH resource: the index of the initial cyclic shift, the number of symbols for PUCCH transmission, and / or the first symbol for PUCCH transmission.

[0122] (1) PUCCH format 1 (PF1 or F1)

[0123] - Supported UCI payload size: up to K bits (e.g., K = 2)

[0124] - Number of OFDM symbols constituting a single PUCCH: Y to Z symbols (e.g., Y = 4 and Z = 14)

[0125] - Transmission structure: DMRS and UCI are configured / mapped to different OFDM symbols in TDM. In other words, DMRS is sent in the symbol where no modulation symbol is sent, and UCI is represented as the product between a specific sequence (e.g., orthogonal cover code (OCC)) and a modulation (e.g., QPSK) symbol. Code division multiplexing (CDM) is supported between multiple PUCCH resources (conforming to PUCCH format 1) (within the same RB) by applying cyclic shift (CS) / OCC to both UCI and DMRS. PUCCH format 1 carries up to 2 bits of UCI and the modulation symbols are extended by OCC in the time domain (configured differently depending on whether frequency hopping is performed).

[0126] - The configuration of PUCCH format 1 includes the following parameters for the corresponding PUCCH resource: the index of the initial cyclic shift, the number of symbols for PUCCH transmission, and the index of the first symbol and / or OCC for PUCCH transmission.

[0127] (2) PUCCH format 2 (PF2 or F2)

[0128] - Supported UCI payload size: more than K bits (e.g., K = 2)

[0129] - Number of OFDM symbols constituting a single PUCCH: 1 to X symbols (e.g., X = 2)

[0130] - Transmission structure: Frequency-division multiplexing (FDM) is used within the same symbol to configure / map DMRS and UCI. The UE sends the UCI by applying only IFFT to the encoded UCI bits without DFT. PUCCH format 2 carries UCI with a bit size larger than K bits, and the modulation symbols are subject to FDM together with the DMRS for transmission. For example, DMRS is located at symbol indices #1, #4, #7, and #10 within a given RB at a density of 1 / 3. A pseudo-noise (PN) sequence is used for the DMRS sequence. Frequency hopping can be activated for the 2-symbol PUCCH format 2.

[0131] - The configuration of PUCCH format 2 includes the following parameters for the corresponding PUCCH resource: the number of PRBs, the number of symbols for PUCCH transmission, and / or the first symbol for PUCCH transmission.

[0132] (3) PUCCH format 3 (PF3 or F3)

[0133] - Supported UCI payload size: more than K bits (e.g., K = 2)

[0134] - Number of OFDM symbols constituting a single PUCCH: Y to Z symbols (e.g., Y = 4 and Z = 14)

[0135] - Transmission structure: DMRS and UCI are configured / mapped to different OFDM symbols in time-division multiplexing (TDM). The UE sends the UCI by applying DFT to the encoded UCI bits. PUCCH format 3 does not support UE multiplexing for the same time-frequency resource (e.g., the same PRB).

[0136] The configuration of PUCCH format 3 includes the following parameters for the corresponding PUCCH resource: the number of PRBs, the number of symbols for PUCCH transmission, and / or the first symbol for PUCCH transmission.

[0137] (4)PUCCH Format 4 (PF4 or F4)

[0138] - Supported UCI Payload Size: More than K bits (e.g., K = 2)

[0139] - Number of OFDM Symbols Constituting a Single PUCCH: Y to Z symbols (e.g., Y = 4 and Z = 14)

[0140] - Transmission Structure: DMRS and UCI are configured / mapped to different OFDM symbols in TDM for different OFDM symbols. By applying OCC at the front end of the DFT and applying CS to the DMRS (or interleaved FDM (IFDM) mapping), PUCCH Format 4 can multiplex up to 4 UEs in the same PRB. In other words, the modulation symbols of the UCI are subject to TDM together with the DMRS for transmission.

[0141] - The configuration of PUCCH Format 4 includes the following parameters for the corresponding PUCCH resource: the number of symbols for PUCCH transmission, the length of the OCC, the index of the OCC, and the first symbol for PUCCH transmission.

[0142] The following table shows the PUCCH formats. The PUCCH formats can be divided into short PUCCH formats (Format 0 and 2) and long PUCCH formats (Format 1, 3, and 4) according to the PUCCH transmission length.

[0143] [Table 5]

[0144]

[0145] The PUCCH resources can be determined according to the UCI type (e.g., A / N, SR, or CSI). The PUCCH resources for UCI transmission can be determined based on the UCI (payload) size. For example, the BS can configure multiple PUCCH resource sets for the UE, and the UE can select a specific PUCCH resource set corresponding to a specific range according to the range of the UCI (payload) size (e.g., the number of UCI bits). For example, the UE can select one of the following PUCCH resource sets according to the number N of UCI bits UCI to select one of the following PUCCH resource sets. - PUCCH Resource Set #0, if the number of UCI bits = < 2

[0146] - PUCCH Resource Set #1, if 2 < the number of UCI bits = < N 1 ...

[0147] - PUCCH Resource Set #(K - 1), if N K-2 < the number of UCI bits = < N K-1

[0148] Here, K represents the number of PUCCH resource sets (K>1), and N i represents the maximum number of UCI bits supported by PUCCH resource set #i. For example, PUCCH resource set #1 may include resources for PUCCH formats 0 to 1, while other PUCCH resource sets may include resources for PUCCH formats 2 to 4 (see Table 5).

[0149] The configuration of each PUCCH resource includes a PUCCH resource index, a starting PRB index, and a configuration of one of PUCCH formats 0 to 4. The UE is configured with a code rate for multiplexing HARQ-ACK, SR, and CSI reports within PUCCH transmissions using PUCCH format 2, PUCCH format 3, or PUCCH format 4 by the BS through a higher layer parameter maxCodeRate. The higher layer parameter maxCodeRate is used to determine how to feedback UCI on PUCCH resources for PUCCH formats 2, 3, or 4.

[0150] If the UCI type is SR and CSI, the PUCCH resources in the PUCCH resource set to be used for UCI transmission can be configured for the UE through higher layer signaling (e.g., RRC signaling). If the UCI type is HARQ-ACK for semi-persistent scheduled (SPS) PDSCH, the PUCCH resources in the PUCCH resource set to be used for UCI transmission can be configured for the UE through higher layer signaling (e.g., RRC signaling). On the other hand, if the UCI type is HARQ-ACK for PDSCH scheduled by DCI, the PUCCH resources in the PUCCH resource set to be used for UCI transmission can be scheduled by DCI.

[0151] In the case of DCI-based PUCCH resource scheduling, the BS may send DCI to the UE on the PDCCH and indicate the PUCCH resources in a specific PUCCH resource set to be used for UCI transmission through the ACK / NACK Resource Indicator (ARI) in the DCI. The ARI can be used to indicate the PUCCH resources for ACK / NACK transmission and is also referred to as the PUCCH Resource Indicator (PRI). Here, the DCI can be used for PDSCH scheduling, and the UCI may include HARQ-ACK for the PDSCH. The BS may configure for the UE, through (UE-specific) higher layer (e.g., RRC) signaling, a PUCCH resource set that includes a larger number of PUCCH resources than the states that can be represented by the ARI. The ARI may indicate a subset of the PUCCH resources of the PUCCH resource set, and which PUCCH resource in the indicated subset of PUCCH resources is to be used may be determined according to an implicit rule based on the transmission resource information about the PDCCH (e.g., the starting CCE index of the PDCCH).

[0152] For UL-SCH data transmission, the UE shall include UL resources available for the UE, and for DL-SCH data reception, the UE shall include DL resources available for the UE. The UL resources and DL resources are allocated to the UE by the BS through resource allocation. The resource allocation may include Time Domain Resource Allocation (TDRA) and Frequency Domain Resource Allocation (FDRA). In the present disclosure, the UL resource allocation is also referred to as UL grant, and the DL resource allocation is referred to as DL assignment. The UL grant is received by the UE dynamically on the PDCCH or in the RAR or is configured semi-persistently by the BS for the UE through RRC signaling. The DL assignment is received by the UE dynamically on the PDCCH or is configured semi-persistently by the BS for the UE through RRC signaling.

[0153] On the UL, the BS may dynamically allocate UL resources to the UE through the PDCCH addressed to the Cell Radio Network Temporary Identifier (C-RNTI). The UE monitors the PDCCH to discover possible UL grants for UL transmission. The BS may use configured grants to allocate UL resources to the UE. Two types of configured grants, type 1 and type 2, may be used. In type 1, the BS directly provides the configured UL grant (including the period) through RRC signaling. In type 2, the BS may configure the period of the RRC-configured UL grant through RRC signaling and signal, activate, or deactivate the configured UL grant through the PDCCH addressed to the Configured Scheduling RNTI (CS-RNTI). For example, in type 2, the PDCCH indication addressed to the CS-RNTI may implicitly reuse the corresponding UL grant according to the configured period through RRC signaling until deactivation.

[0154] On the DL, the BS can dynamically allocate DL resources to the UE by addressing the PDCCH to the C-RNTI. The UE monitors the PDCCH to discover possible DL grants. The BS can use SPS to allocate DL resources to the UE. The BS can configure the period of the configured DL assignment via RRC signaling and signal, activate, or deactivate the configured DL assignment by addressing the PDCCH to the CS-RNTI. For example, the PDCCH indication addressed to the CS-RNTI can implicitly reuse the corresponding DL assignment according to the configured period via RRC signaling until deactivation.

[0155] In the following, resource allocation via the PDCCH and resource allocation via the RRC will be described in more detail.

[0156] *Resource Allocation via PDCCH: Dynamic Grant / Assignment

[0157] The PDCCH can be used to schedule DL transmissions on the PDSCH and UL transmissions on the PUSCH. The DCI on the PDCCH for scheduling DL transmissions can include a DL resource assignment that at least includes a modulation and coding format associated with the DL-SCH (e.g., modulation and coding scheme (MCS) index I_MCS), resource allocation, and HARQ information. The DCI on the PDCCH for scheduling UL transmissions can include a UL scheduling grant that at least includes a modulation and coding format associated with the UL-SCH, resource allocation, and HARQ information. The size and usage of the DCI carried by one PDCCH vary according to the DCI format. For example, DCI format 0_0, DCI format 0_1, or DCI format 0_2 can be used to schedule the PUSCH, while DCI format 1_0, DCI format 1_1, or DCI format 1_2 can be used to schedule the PDSCH. In particular, DCI format 0_2 and DCI format 1_2 can be used to schedule transmissions with higher transmission reliability and lower latency requirements compared to the transmission reliability and latency requirements guaranteed by DCI format 0_0, DCI format 0_1, DCI format 1_0, or DCI format 1_1. Some implementations of the present disclosure can be applied to UL data transmission based on DCL format 0_2. Some implementations of the present disclosure can be applied to DL data reception based on DCI format 1_2.

[0158] Figure 7 Illustrate an example of PDSCH TDRA caused by the PDCCH and an example of PUSCH TDRA caused by the PDCCH.

[0159] The DCI carried by the PDCCH to schedule the PDSCH or PUSCH includes a TDRA field. The TDRA field provides the value m of the row index m+1 to the allocation table for the PDSCH or PUSCH. The predefined default PDSCH time-domain allocation is used as the allocation table for the PDSCH, or the PDSCH TDRA table configured by the pdsch-TimeDomainAllocationList signaled by the BS via RRC is used as the allocation table for the PDSCH. The predefined default PUSCH time-domain allocation is used as the allocation table for the PUSCH, or the PUSCH TDRA table configured by the pusch-TimeDomainAllocationList signaled by the BS via RRC is used as the allocation table for the PUSCH. The PDSCH TDRA table to be applied and / or the PUSCH TDRA table to be applied can be determined according to fixed / predefined rules (e.g., refer to 3GPP TS38.214).

[0160] In the PDSCH time-domain resource configuration, each indexed row defines the DL assignment to the PDSCH time slot offset K 0 , the start and length indicator SLIV (or directly, the start position of the PDSCH in the time slot (e.g., the start symbol index S) and the allocation length (e.g., the number of symbols, L)), and the PDSCH mapping type. In the PUSCH time-domain resource configuration, each indexed row defines the UL grant to the PUSCH time slot offset K 2 , the start position of the PUSCH in the time slot (e.g., the start symbol index S) and the allocation length (e.g., the number of symbols, L), and the PUSCH mapping type. The K for the PDSCH 0 and the K for the PUSCH 2Indicate the difference between a time slot with PDCCH and a time slot with a PDSCH or PUSCH corresponding to the PDCCH. SLIV represents a combined indicator of the starting symbol S relative to the start of the time slot with PDSCH or PUSCH and the number L of adjacent symbols counted from symbol S. The PDSCH / PUSCH mapping type includes two mapping types: one is mapping type A and the other is mapping type B. For PDSCH / PUSCH mapping type A, DMRS is mapped to the PDSCH / PUSCH resource relative to the start of the time slot, and one or two symbols among the symbols of the PDSCH / PUSCH resource can be used as DMRS symbols according to other DMRS parameters. For example, in the case of PDSCH / PUSCH mapping type A, according to RRC signaling, DMRS is located at the third symbol (symbol #2) or the fourth symbol (symbol #3) of the time slot. For PDSCH / PUSCH mapping type B, DMRS is mapped relative to the first OFDM symbol of the PDSCH / PUSCH resource. According to other DMRS parameters, one or two symbols starting from the first symbol of the PDSCH / PUSCH resource can be used as DMRS symbols. For example, in the case of PDSCH / PUSCH mapping type B, DMRS is located at the first symbol allocated for PDSCH / PUSCH. In the present disclosure, the PDSCH / PUSCH mapping type can be referred to as the mapping type or the DMRS mapping type. For example, in the present disclosure, PUSCH mapping type A is also referred to as mapping type A or DMRS mapping type A, and PUSCH mapping type B is also referred to as mapping type B or DMRS mapping type B.

[0161] The scheduling DCI includes an FDRA field that provides assignment information about the RBs for PDSCH or PUSCH. For example, the FDRA field provides the UE with information about the cell for PDSCH or PUSCH transmission, information about the BWP for PDSCH or PUSCH transmission, and / or information about the RBs for PDSCH or PUSCH transmission.

[0162] *Resource allocation via RRC

[0163] As mentioned above, there are two types of transmissions without dynamic grants: configured grant type 1 and configured grant type 2. In configured grant type 1, the UL grant is provided by RRC and stored as a configured UL grant. In configured grant type 2, the UL grant is provided by PDCCH and stored or cleared as a configured UL grant based on L1 signaling indicating activation or deactivation of the configured UL grant. Type 1 and type 2 can be configured by RRC per serving cell and per BWP. Multiple configurations can be active simultaneously on different serving cells.

[0164] When configured with configured grant type 1, the following parameters can be provided to the UE via RRC signaling:

[0165] - cs-RNTI, corresponding to the CS-RNTI used for retransmission;

[0166] - periodicity, corresponding to the period of configured grant type 1;

[0167] - timeDomainOffset, indicating the offset of the resource in the time domain relative to system frame number (SFN) = 0;

[0168] – timeDomainAllocation value m, providing the row index m + 1 into the allocation table, indicating the combination of starting symbol S, length L, and PUSCH mapping type;

[0169] - frequencyDomainAllocation, providing the frequency domain resource allocation; and

[0170] – mcsAndTBS, providing I MCS , indicating the modulation order, target code rate, and transport block size.

[0171] When the configured grant type 1 is configured for the serving cell via RRC, the UE stores the UL grant provided via RRC as the configured UL grant for the indicated serving cell, and initializes or re-initializes the configured UL grant to start in the symbol according to timeDomainOffset and S (derived from SLIV) and repeat according to periodicity. After configuring the UL grant for the configured grant type 1, the UE can consider the UL grant to repeat associated with each symbol that satisfies the following condition for all N >= 0: [(SFN * numberOfSlotsPerFrame * numberOfSymbolsPerSlot)+(slot number in the frame * numberOfSymbolsPerSlot)+ symbol number in the slot] = (timeDomainOffset * numberOfSymbolsPerSlot + S + N * periodicity) modulo (1024 * numberOfSlotsPerFrame * numberOfSymbolsPerSlot), where numberOfSlotsPerFrame and numberOfSymbolsPerSlot indicate the number of consecutive slots per frame and the number of consecutive OFDM symbols per slot, respectively (see Tables 1 and 2).

[0172] For the configured grant type 2, the following parameters can be provided by the BS to the UE via RRC signaling:

[0173] - cs-RNTI, corresponding to the CS-RNTI used for activation, deactivation, and retransmission; and

[0174] - periodicity, providing the period of the configured grant type 2.

[0175] The actual UL grant is provided to the UE via the PDCCH (addressed to the CS-RNTI). After the UL grant is configured for grant type 2, the UE can assume that the UL grant is reproduced associated with each symbol that satisfies the following condition for all N >= 0: [(SFN * numberOfSlotsPerFrame * numberOfSymbolsPerSlot)+(slot number in the frame * numberOfSymbolsPerSlot)+ symbol number in the slot] = [(SFN start time * numberOfSlotsPerFrame * numberOfSymbolsPerSlot + slot start time * numberOfSymbolsPerSlot + symbol start time ) + N * periodicity] modulo (1024 * numberOfSlotsPerFrame * numberOfSymbolsPerSlot), where SFN start time 、slot start time and symbol start time respectively represent the SFN, slot, and symbol of the first transmission opportunity of the PUSCH after the configured grant is (re)initialized, and numberOfSlotsPerFrame and numberOfSymbolsPerSlot respectively indicate the number of consecutive slots per frame and the number of consecutive OFDM symbols per slot (refer to Tables 2 and 3).

[0176] On the DL, semi-persistent scheduling (SPS) can be configured for the UE by the BS via RRC signaling per serving cell and per BWP. For DL SPS, the DL assignment is provided to the UE via the PDCCH and stored or cleared based on the L1 signaling indicating SPS activation or deactivation. When SPS is configured, the following parameters can be provided by the BS to the UE via RRC signaling:

[0177] - cs-RNTI, corresponding to the CS-RNTI used for activation, deactivation, and retransmission;

[0178] -nrofHARQ-Processes, which provides the number of HARQ processes for SPS;

[0179] -periodicity, which provides the period of the DL assignment for the configuration of SPS.

[0180] After configuring the DL assignment for SPS, the UE can sequentially consider that the Nth DL assignment occurs in a time slot that satisfies the following condition: (numberOfSlotsPerFrame * SFN + the time slot number in the frame) = [(numberOfSlotsPerFrame * SFN start time + slot start time ) + N * periodicity * numberOfSlotsPerFrame / 10] modulo (1024 * numberOfSlotsPerFrame), where SFN start time and slot start time respectively indicate the SFN and the time slot of the first transmission of the PDSCH after the configured DL assignment is (re)initialized, and numberOfSlotsPerFrame and numberOfSymbolsPerSlot respectively indicate the number of consecutive time slots per frame and the number of consecutive OFDM symbols per time slot (refer to Table 1 and Table 2).

[0181] If the CRC of the corresponding DCI format is scrambled with the CS-RNTI provided by the RRC parameter cs-RNTI, and the new data indicator field for the enabled transport block is set to 0, the UE verifies the DLSPS assignment PDCCH or the configured UL grant type 2 PDCCH for scheduling activation or scheduling release. If all fields of the DCI format are set according to Tables 8 and 9, the verification of the DCI format is achieved. Table 8 shows an example of the special fields for DL SPS and UL grant type 2 scheduling activation PDCCH verification, while Table 9 shows an example of the special fields for DL SPS and UL grant type 2 scheduling release PDCCH verification.

[0182] [Table 6]

[0183]

[0184] Table 7

[0185] DCI format 0_0 DCI format 1_0 HARQ process number Set to all '0' Set to all '0' Redundancy version Set to '00' Set to '00' Modulation and coding scheme Set to all '1' Set to all '1' Resource block assignment Set to all '1' Set to all '1'

[0186] The actual DL assignment and UL grant for DL SPS or UL grant type 2, and the corresponding MCS, are provided by the resource assignment fields (e.g., the TDRA field providing the TDRA value m, the FDRA field providing the frequency resource block assignment, and / or the MCS field) in the DCI format carried by the PDCCH scheduled by the corresponding DL SPS or UL grant type 2. If verification is implemented, the UE considers the information in the DCI format as a valid activation or valid release of the DL SPS or the configured UL grant type 2.

[0187] Figure 8 The figure illustrates the HARQ-ACK transmission / reception process.

[0188] Reference Figure 8 , the UE can detect the PDCCH in slot n. Next, the UE can receive the PDSCH in slot n+K0 according to the scheduling information received via the PDCCH in slot n, and then transmit the UCI via the PUCCH in slot n+K1. In this case, the UCI includes the HARQ-ACK response for the PDSCH.

[0189] The DCI (e.g., DCI format 1_0 or DCI format 1_1) carried by the PDCCH for scheduling the PDSCH may include the following information.

[0190] - FDRA: The FDRA indicates the set of RBs allocated to the PDSCH.

[0191] - TDRA: The TDRA indicates the DL assignment to the PDSCH slot offset K0, the starting position (e.g., symbol index S) and length (e.g., number of symbols L) of the PDSCH in the slot, and the PDSCH mapping type. The PDSCH mapping type A or PDSCH mapping type B can be indicated by the TDRA. For PDSCH mapping type A, the DMRS is located in the third symbol (symbol #2) or the fourth symbol (symbol #3) in the slot. For PDSCH mapping type B, the DMRS is allocated in the first symbol assigned to the PDSCH.

[0192] - PDSCH-to-HARQ_feedback timing indicator: This indicator indicates K1.

[0193] If the PDSCH is configured to transmit at most one TB, the HARQ-ACK response can consist of one bit. If the PDSCH is configured to transmit at most two TBs, the HARQ-ACK response can consist of two bits when spatial bundling is not configured, and one bit when spatial bundling is configured. When the HARQ-ACK transmission timing for multiple PDSCHs is specified as slot n + K1, the UCI transmitted in slot n + K1 includes the HARQ-ACK responses for multiple PDSCHs.

[0194] In the present disclosure, the HARQ-ACK payload consisting of HARQ-ACK bits for one or more PDSCHs may be referred to as a HARQ-ACK codebook. The HARQ-ACK codebook can be classified into a semi-static HARQ-ACK codebook and a dynamic HARQ-ACK codebook according to the HARQ-ACK payload determination scheme.

[0195] In the case of a semi-static HARQ-ACK codebook, the parameters related to the HARQ-ACK payload size to be reported by the UE are semi-statically determined by a higher layer (e.g., RRC) signal (specific to the UE). The HARQ-ACK payload size of the semi-static HARQ-ACK codebook, e.g., the (maximum) HARQ-ACK payload (size) transmitted via a PUCCH in a time slot, can be determined based on the number of HARQ-ACK bits corresponding to a combination of the following (hereinafter referred to as the bundling window): all DL carriers configured for the UE (i.e., DL serving cells) and all DL scheduling time slots (or PDSCH transmission time slots or PDCCH monitoring time slots) for which HARQ-ACK transmission timing can be indicated. That is, in the semi-static HARQ-ACK codebook scheme, the size of the HARQ-ACK codebook is fixed (to the maximum value) regardless of the number of actually scheduled DL data. For example, the DL grant DCI (PDCCH) includes PDSCH-to-HARQ-ACK timing information, and the PDSCH-to-HARQ-ACK timing information can have one value among multiple values (e.g., k). For example, when a PDSCH is received in time slot #m and the PDSCH-to-HARQ-ACK timing information in the DL grant DCI (PDCCH) for scheduling the PDSCH indicates k, the HARQ-ACK information for the PDSCH can be transmitted in time slot #(m + k). As an example, k ∈ {1, 2, 3, 4, 5, 6, 7, 8}. When HARQ-ACK information is transmitted in time slot #n, the HARQ-ACK information can include the possible maximum HARQ-ACK based on the bundling window. That is, the HARQ-ACK information in time slot #n can include the HARQ-ACK corresponding to time slot #(n - k). For example, when k ∈ {1, 2, 3, 4, 5, 6, 7, 8}, the HARQ-ACK information in time slot #n can include the HARQ-ACK corresponding to time slots #(n - 8) to #(n - 1) regardless of the actual DL data reception (i.e., the maximum number of HARQ-ACKs). Here, the HARQ-ACK information can be replaced with the HARQ-ACK codebook or the HARQ-ACK payload. The time slot can be understood as / replaced with a candidate opportunity for DL data reception or replaced with a candidate opportunity for DL data reception. As described in the example, the bundling window can be determined based on the PDSCH-to-HARQ-ACK timing according to the HARQ-ACK time slot, and the set of PDSCH-to-HARQ-ACK timings can have predefined values (e.g., {1, 2, 3, 4, 5, 6, 7, 8}) or can be configured by higher layer (RRC) signaling.In the case of a dynamic HARQ-ACK codebook, the size of the HARQ-ACK payload to be reported by the UE can be dynamically changed, e.g., by DCI. In a dynamic HARQ-ACK codebook scheme, the DL scheduling DCI may include a counter-DAI (i.e., c-DAI) and / or a total-DAI (i.e., t-DAI). Here, DAI indicates the downlink assignment index and is used by the BS to notify the UE of the transmitted or scheduled PDSCH for which the HARQ-ACK will be included in a HARQ-ACK transmission. In particular, c-DAI is an index indicating the order between PDCCHs (hereinafter referred to as DL scheduling PDCCHs) carrying the DL scheduling DCI, and t-DAI is an index indicating the total number of DL scheduling PDCCHs up to the current time slot in which there is a PDCCH with t-DAI.

[0196] In the NR system, a method for implementing multiple logical networks in a single physical network is considered. The logical networks need to support services with various requirements (e.g., eMBB, mMTC, URLLC, etc.). Therefore, the physical layer of NR is designed to support a flexible transmission structure considering various service requirements. As an example, the physical layer of NR can change the OFDM symbol length (OFDM symbol duration) and the subcarrier spacing (SCS) (hereinafter referred to as the OFDM parameter set) when necessary. The transmission resources of the physical channel can also be changed within a predetermined range (in units of symbols). For example, in NR, PUCCH (resources) and PUSCH (resources) can be configured to flexibly have a transmission length / transmission start timing within a predetermined range.

[0197] The PDCCH is transmitted via a control resource set (CORESET). One or more CORESETs can be configured for a UE. A CORESET consists of a set of PRBs with a duration of 1 to 3 OFDM symbols. The PRBs constituting the CORESET and the CORESET duration can be provided to the UE via higher layer (e.g., RRC) signaling. The set of PDCCH candidates in the configured CORESET is monitored according to the corresponding search space set. In the present disclosure, monitoring implies decoding each PDCCH candidate according to the monitored DCI format (referred to as blind decoding). The master information block (MIB) on the PBCH provides parameters (e.g., CORESET#0 configuration) for monitoring the PDCCH for scheduling the PDSCH carrying the system information block 1 (SIB1) to the UE. The PBCH can also indicate that there is no associated SIB1. In this case, not only can the UE be provided with the frequency range in which the UE can assume that there is no SSB associated with the SSB1, but also the UE can be provided with other frequencies for searching for the SSB associated with the SIB1. CORESET#0 for at least the CORESET for scheduling SIB1 can be configured via the MIB or dedicated RRC signaling.

[0198] The set of PDCCH candidates monitored by the UE is defined according to the PDCCH search space set. The search space set can be a common search space (CSS) set or a UE-specific search space (USS) set. Each CORESET configuration is associated with one or more search space sets, and each search space set is associated with a CORESET configuration. The search space set is determined based on the following parameters provided by the BS to the UE.

[0199] - controlResourceSetId: An identifier for identifying the CORESET p associated with the search space set s.

[0200] - monitoringSlotPeriodicityAndOffset: The PDCCH monitoring period k of the time slot s and the o s time slot offsets of the time slots configured for PDCCH monitoring.

[0201] - duration: T s The duration of < indicates the number of time slots k in which the search space set s exists s time slots.

[0202] - monitoringSymbolsWithinSlot: The PDCCH monitoring pattern within the time slot, indicating the first symbol of the CORESET within the time slot for PDCCH monitoring.

[0203] -nrofCandidates: The number of PDCCH candidates for each CCE aggregation level.

[0204] -searchSpaceType: An indication of whether search space set s is a set of CCEs or a set of USSs.

[0205] The parameter monitoringSymbolsWithinSlot can indicate the first symbol used for PDCCH monitoring in the time slot configured for PDCCH monitoring (see, for example, monitoringSlotPeriodicityAndOffset and duration). For example, when monitoringSymbolsWithinSlot is a 14-bit parameter, the most significant (leftmost) bit can represent the first OFDM symbol in the time slot, and the second most significant (leftmost) bit can represent the second OFDM symbol in the time slot. In this way, the bits of monitoringSymbolsWithinSlot can respectively represent 14 OFDM symbols in the time slot. For example, the bits set to 1 among the bits in monitoringSymbolsWithinSlot can identify the first symbol of the CORESET in the time slot.

[0206] The UE monitors PDCCH candidates only in PDCCH monitoring occasions. The UE determines the monitoring occasions on the active DL BWP according to the PDCCH monitoring period, PDCCH monitoring offset, and PDCCH monitoring pattern within the time slot. In some implementations, for search space set s, if (n f *N frame,u slot +n u s,f -o s ) mod k s = 0, then the UE determines that a PDCCH monitoring occasion exists in the time slot with number n f in the frame with number n u s,f . The UE starts monitoring PDCCH candidates for search space set s for T u s,f consecutive time slots starting from time slot n s , and does not monitor PDCCH candidates for search space set s for the next k s -T s time slots.

[0207] The following table shows search space sets, related RNTIs, and their use cases.

[0208] Table 8

[0209]

[0210] The following table shows the DCI formats carried by PDCCH.

[0211] Table 9

[0212]

[0213] DCI format 0_0 can be used to schedule TB-based (or TB-level) PUSCH, and DCI format 0_1 can be used to schedule TB-based (or TB-level) PUSCH or codeblock-group (CBG)-based (or CBG-level) PUSCH. DCI format 1_0 can be used to schedule TB-based (or TB-level) PDSCH, and DCI format 1_1 can be used to schedule TB-based (or TB-level) PDSCH or CBG-based (or CBG-level) PDSCH. For CSS, DCI format 0_0 and DCI format 1_0 have a fixed size after the BWP size is initially given by RRC. For USS, the sizes of DCI format 0_0 and DCI format 1_0 in fields other than the frequency-domain resource assignment (FDRA) field are fixed, and the size of the FDRA field can be changed by the BS through the configuration of relevant parameters. In DCI format 0_1 and DCI format 1_1, the size of the DCI field can be changed by the BS through various RRC reconfigurations. DCI format 2_0 can be used to transmit dynamic time slot format information (e.g., SFI DCI) to the UE, and DCI format 2_1 can be used to transmit downlink preemption information to the UE. DCI format 2_4 can be used to indicate the UL resources for which the UL transmission from the UE should be cancelled.

[0214] For example, each of DCI format 0_0 and DCI format 0_1 may include an FDRA field for scheduling PUSCH, and each of DCI format 1_0 and DCI format 1_1 may include an FDRA field for scheduling PDSCH. The number of bits in the FDRA field of each of DCI format 0_0 and DCI format 0_1 can be determined based on N RB UL ,BWP which is the size of the active or initial UL BWP. The number of bits in the FDRA field of each of DCI format 1_0 and DCI format 1_1 can be determined based on N RB UL,BWP which is the size of the active or initial DL BWP. RB DL,BWP which is the size of the active or initial DL BWP. RB DL,BWP which is the size of the active or initial DL BWP.

[0215] One of the representative scenarios of the next-generation system, URLLC has a user-plane latency of 0.5 ms and a transmission error rate of less than 10 for transmitting X bytes of data within 1 ms. -5 The low-latency and high-reliability requirements. Generally, eMBB is characterized by large traffic capacity, file sizes equal to or less than dozens to hundreds of bytes, and sporadic occurrences. Therefore, eMBB may require transmissions that maximize the transmission rate and minimize the overhead of control information, and URLLC may require relatively short transmission cycles (e.g., two symbols) and reliable transmission methods.

[0216] Depending on the application area or service type, various reference time units can be assumed / used to transmit / receive physical channels. The reference time can be the basic unit for scheduling a specific physical channel and can be changed according to the number of symbols and / or subcarrier spacing (SCS) in the scheduling time unit. For the convenience of description, some embodiments / implementations of the present disclosure are described in the context of a time slot or a mini-slot as the reference time unit. A time slot can be, for example, the basic scheduling unit for general data services (e.g., eMBB). A mini-slot can have a shorter duration in the time domain than a time slot and can be the scheduling basic unit for special purposes or for special communication schemes (e.g., URLLC, unlicensed bands, or millimeter waves). However, the embodiments / implementations of the present disclosure can also be applied to transmitting / receiving physical channels of a mini-slot for eMBB or transmitting / receiving physical channels of a time slot for URLLC or other communication schemes.

[0217] The above description (based on 3GPP systems, frame structures, etc.) can be applied in combination with the methods proposed in the present disclosure to be described later or can be supplemented to clarify the technical features of the methods proposed in the present disclosure.

[0218] The present disclosure will describe a method for a UE to reduce power and facilitate the implementation of the UE by using a limited Physical Downlink Control Channel Monitoring Opportunity (MO) when various types of services such as eMBB and URLLC that require different latencies and reliabilities are supported through dynamic resource sharing between UEs to allow long-latency and / or low-reliability services (e.g., eMBB).

[0219] Even if the available UL resources are pre-allocated to a UE (eMBB UE) using a service such as eMBB, dynamic resource sharing can be used to allocate UL resources to a UE (URLLC UE) using a service that requires low latency and / or high reliability (e.g., URLLC). In this case, the BS can use a service such as URLLC to schedule UL resources pre-occupied by the eMBB UE to the UE, and can indicate to the eMBB UE not to use the pre-allocated UL resources through an uplink cancellation indication (UL CI).

[0220] For a series of operations, the eMBB UE needs to detect the UL CI in the PDCCH. The UL CI needs to be detected by the eMBB UE before the UL transmission of the URLLC UE starts, so that the eMBB UE can stop its UL transmission to successfully reduce interference to the URLLC transmission. Depending on services such as URLLC, the transmission can start within a short time after scheduling, so the monitoring occasion (MO) frequency of the PDCCH carrying the ULCI needs to be frequent enough for the eMBB UE to detect the UL CI within the corresponding time. However, it may not be necessary to indicate the DCI that is usually transmitted to the eMBB UE at such short intervals, so frequent PDCCH monitoring may generally consume unnecessary power and waste the computing power of the eMBB UE. To overcome this problem, it may be necessary to configure the PDCCH MO suitable for the uplink cancellation indication (UL CI) of the eMBB UE and limit the UE to monitor the ULCI only under specific conditions.

[0221] The present disclosure proposes a method for the BS to configure a PDCCH MO suitable for the UE and / or conditions for a given UE to monitor the ULCI. Additionally, the present disclosure proposes a method for additionally reducing unnecessary monitoring by restricting the UL CI to only specific UL transmissions.

[0222] In NR, various parameter sets or SCSs can be supported to support various 5G services. For example, with an SCS of 15 kHz, a wide area in the traditional cellular band can be supported, while with an SCS of 30 kHz / 60 kHz, dense urban areas, lower latency, and wide carrier bandwidth can be supported. With an SCS of 60 kHz or higher, a bandwidth greater than 24.25 GHz can be supported to overcome phase noise.

[0223] The present disclosure proposes the following method. Even if the BS configures for the UE the MO in which the UE monitors the UL CI, the UE monitors the UL CI (i.e., monitors the PDCCH carrying the UL CI) only in the MOs that meet specific conditions, so as to prevent the UE from unnecessarily monitoring the UL CI. For example, the specific conditions may include conditions related to UL transmissions that are pre-scheduled or configured for the corresponding UE and / or messages related thereto and / or the time / frequency resources of the radio resources used in the UL transmissions. In some implementations, the UL transmissions used under specific conditions may be limited to specific types of UL transmissions.

[0224] For the sake of convenience, the following proposals of the present disclosure will be described by taking the physical uplink shared channel (PUSCH) as an example, but the following proposals of the present disclosure can be extended and applied to other UL and / or DL channels and signals.

[0225] On the UE side

[0226] First, the implementation of the present disclosure will be described from the UE side.

[0227] Figure 9 FIG. illustrates an example of UE operation according to some implementations of the present disclosure. In the present disclosure, the UE may monitor the UL CI only in the valid MOs used to cancel the UL transmissions indicated or configured for the UE by the UL CI. Hereinafter, examples of UE operation according to some implementations of the present disclosure will be described.

[0228] (1) The UE may receive a UL schedule (e.g., resource allocation for UL transmission) from the BS.

[0229] The operation of the UE receiving the UL schedule from the BS may be implemented by, for example Figure 2 or Figure 3 devices. For example, referring to Figure 2 , one or more processors 102 may control one or more transceivers 106 and / or one or more memories 104 to receive the UL schedule from the BS, and one or more transceivers 106 may receive the UL schedule from the BS. In this case, the UL schedule may be received in the DCI. Alternatively, the UL schedule may be configured for the UE by radio resource control (RRC) signaling from the BS.

[0230] Before receiving the UL schedule, the UE may receive RRC configuration information from the BS. For example, the UE may receive RRC configuration information including specific parameters related to the MO and resources configured for the transmission / reception of the UL CI described in Implementations A1 to A9. In some implementations of the present disclosure, the specific parameters may include the following parameters.

[0231] - SearchSpace IE: Parameters used to configure for the UE whether it can receive UL CI in a MO. For example, the SearchSpace IE may include parameters related to whether it is likely to receive UL CI in the MO indicated / configured by the SearchSpace IE, and the UE can identify the MO in which it is likely to receive UL CI through the SearchSpace IE sent via RRC configuration. For example, when the SearchSpace IE includes the DCI format of UL CI (e.g., DCI format 2_4), the UE can determine the possibility of UL CI being sent in the MO configured by the SearchSpace IE.

[0232] - ControlResourceSet IE: Parameters related to the resource set in which UL CI is sent / received. For example, the UE can receive control information from the BS through at least one resource included in the ControlResourceSet IE. For example, the UE can receive UL CI by monitoring whether UL CI is sent through the resource region included in the ControlResourceSet IE in the MO indicated by the SearchSpace IE.

[0233] The operation of receiving the RRC configuration information including the specific parameters related to the MO and the resources configured for the reception of UL CI described in Implementation Modes A1 to A9 can be performed by Figure 2 or Figure 3 the device. For example, referring to Figure 2 , one or more processors 102 can control one or more transceivers 106 and / or at least one memory 104 to receive the RRC configuration information including the specific parameters related to the MO and the resources configured for the reception of UL CI described in Implementation Modes A1 to A9, and one or more transceivers 106 can receive the specific parameters related to the MO and the resources configured for the reception of UL CI from the BS through the RRC configuration information.

[0234] (2) According to some implementation modes of the present disclosure, the UE can determine valid UL CI MOs (S910) that meet specific conditions.

[0235] For example, the UE can use the method described in any one of Implementation Modes A1 to A5 to monitor in the MO the CI for canceling the resource region allocated for UL transmission. In this case, the UE can determine whether the MO is valid to determine the MO for monitoring the CI as described in Implementation Mode A1.

[0236] In some implementations of the present disclosure, it is possible to restrictively determine whether an MO is valid in order to reduce the number of MOs that a UE needs to monitor. In some implementations of the present disclosure, parameters for restricting the number of MOs may be sent from the BS to the UE, or the number of conditions for the UE to determine the validity of an MO may be increased. For example, when receiving, via RRC configuration, parameters for restricting the number of MOs for determining validity from the BS, the UE may determine the validity of an MO among a limited number of MOs based on the received parameters.

[0237] In another example, when receiving, via RRC configuration, parameters for restricting the number of valid MOs from the BS, the UE may determine the validity of an MO among the maximum number of valid MOs based on the received parameters.

[0238] In an implementation of the present disclosure, the UE may determine a reference UL resource as a resource area to be indicated by a UL CI based on the received parameters (e.g., SearchSpace IE or TDD-UL-DL-ConfigCommon IE). For example, the UE may identify an MO among the allocated MOs that satisfies condition 1 or 2 described in Implementations A1-1 and A1-2 as a valid MO for monitoring the CI. For example, the UE may determine that an MO is valid when the following conditions are met.

[0239] - When a UL CI indicating some radio resources used in a specific UL transmission (dynamically or semi-statically) scheduled previously can be detected in a specific UL CI MO, and / or

[0240] - When the UL CI can indicate a pre-scheduled UL transmission via a HARQ process ID, etc., or when the UL CI indicates a specific time and / or frequency resource area, and / or

[0241] - When the resource area used in a specific UL transmission scheduled for the UE is included in the reference resource area of the UL CI that can be received in a specific UL CI MO, and / or

[0242] - When the UL CI MO (or the start or end of the MO) is separated from a pre-scheduled specific UL radio resource (or the start or end of the radio resource) by a pre-determined time (e.g., N symbols).

[0243] The operation of determining valid MOs by the UE may be implemented by a device such as Figure 2 or Figure 3 For example, referring to Figure 2 one or more processors 102 may determine valid MOs among one or more configured MOs.

[0244] In some implementations of the present disclosure, the intervals between multiple configured MOs can be determined according to Implementation Modes A8 and / or A9. For example, the interval between MOs can be determined by a search space period (e.g., the value of monitoringSlotPeriodicityAndOffset in the SearchSpace IE) or can be determined as the average of the actually configured UL CI intervals. For example, when N UL CI MOs are configured in one time slot, different N intervals can be configured for each UL CI MO, and in this case, the period / interval for determining the reference resource region can be the average of the intervals.

[0245] (3) Then, the UE can monitor the UL CI only in the valid MOs (S920 and S930).

[0246] Specifically, the UE can use the methods described in Implementation Modes A2 and / or A3 to monitor the UL CI in the valid MOs. In some implementations of the present disclosure, the UE can determine the valid MOs and can then monitor the MOs for specific UL transmissions described in Implementation Mode A3, and in this case, as described in Implementation Mode A2, only a part of the specific UL transmissions can be considered in the monitoring of the MOs. For example, the UE can only consider a predetermined number of symbols starting from the first symbol of the specific UL transmission.

[0247] The operation of the UE monitoring the UL CI only in the valid MOs can be implemented by, for example, the devices in FIGS. X1 to X9 to be described later. For example, the operation can be implemented by Figure 2 or Figure 2 or Figure 3 of the devices. For example, referring to Figure 2 , one or more processors 102 can monitor the MOs determined to be valid by the UE among the multiple MOs.

[0248] In some implementations of the present disclosure, at least one of the following can be considered to determine the reference resource region related to the UL CI or the length of the reference resource region.

[0249] - The length of the reference resource region of the UL CI received in a specific UL CI MO can be determined as the interval from the corresponding UL CI MO to the next UL CI MO or an integer multiple of the corresponding interval. For example, the interval from the start or last symbol of the CORESET in which a specific UL CI MO is received to the start or last symbol of the CORESET in which the next UL CI MO is received, or an integer multiple of the corresponding interval, can be determined as the reference resource region or the length of the reference resource region, and the transmission of the reference resource region will be cancelled by the corresponding UL CI. In this case, the following method can be used to determine the following ULCI MO.

[0250] > Option 1: The UL CI MO closest to the corresponding UL CI MO (i.e., the first one after the corresponding UL CI MO in time) among the UL CI MOs in which reception is possible, taking into account the TDD configuration received by the UE (e.g., TDD-UL-DL-Configdedicated and TDD-UL-DL-Configcommon) and the slot format indication, can be determined as the next UL CIMO. When Option 1 is applied, the interval between the UL CI MOs in which reception is possible can be the reference resource region for each UL CI MO. Therefore, according to Option 1, considering the UL CI MOs in which actual reception by the UE occurs, the corresponding reference resource regions in which reception by the UE is possible can represent the entire resource region.

[0251] > Option 2: The UL CI MO closest to the corresponding UL CI MO (i.e., the first one after the corresponding UL CI MO in time) among the UL CI MOs in which reception is possible, taking into account the TDD configuration received by the UE (e.g., TDD-UL-DL-Configdedicated and TDD-UL-DL-Configcommon), can be determined as the next UL CI MO. Therefore, the reference resource region can be determined semi-statically.

[0252] > Option 3: The UL CI MO closest to the corresponding UL CI MO (i.e., the first one after the corresponding UL CI MO in time) among the UL CI MOs in which reception is possible, taking into account the cell-common TDD configuration received by the UE (e.g., TDD-UL-DL-Configcommon), can be determined as the next UL CI MO. Therefore, a group of UEs for monitoring the UL CI can have the same reference resource region or reference resource region length.

[0253] - The length of the reference resource region of the UL CI received in a specific UL CI MO can be determined as the search space period (e.g., the value of monitoringSlotPeriodicityAndOffset in the SearchSpace IE) or an integer N times the corresponding time length. In this case, the following method can be used to determine N.

[0254] > Option 1: Considering the TDD configuration received by the UE (e.g., TDD-UL-DL-Configdedicated and TDD-UL-DL-Configcommon) and the slot format indication, the number of unavailable UL CI MOs (e.g., overlapping with UL symbols) until the next UL CI MO where reception is possible or the number of slots in which a UL CI MO is configured but no available UL CI MO (e.g., in DL symbols) exists can be determined as N. Thus, considering the UL CI MO where the actual reception of the UE occurs, the UL CI MO can represent the entire resource region.

[0255] > Option 2: Considering the TDD configuration received by the UE (e.g., TDD-UL-DL-Configdedicated and TDD-UL-DL-Configcommon), the number of unavailable UL CI MOs (e.g., overlapping with UL symbols) until the next UL CI MO where reception is possible or the number of slots in which a UL CI MO is configured but no available UL CI MO (e.g., in DL symbols) exists can be determined as N. Thus, the reference resource region can be determined semi-statically.

[0256] > Option 3: Considering the cell-common TDD configuration received by the UE (e.g., TDD-UL-DL-Configcommon), the number of unavailable UL CI MOs (e.g., overlapping with UL symbols) until the next UL CI MO where reception is possible or the number of slots in which a UL CI MO is configured but no available UL CI MO (e.g., in DL symbols) exists can be determined as N. Thus, a group of UEs for monitoring the UL CI can have the same reference resource region or reference resource region length.

[0257] The operation of the UE to monitor the UL CI only in valid MOs can be implemented by, for example Figure 2 or Figure 3 such devices. For example, refer to Figure 2, one or more processors 102 may control one or more transceivers 106 and / or at least one memory 104 to receive RRC configuration information including specific parameters related to MO and resources configured for the reception of UL CI described in Implementation Modes A1 to A9, and one or more transceivers 106 may receive specific parameters related to MO and resources configured for the reception of UL CI through the RRC configuration information.

[0258] (4) When a UL CI is detected, the UE may cancel the UL transmission according to the resources indicated by the UL CI.

[0259] Specifically, when a UL CI for canceling a specific UL transmission is detected (or received) in a valid MO, the UE may cancel the UL transmission on the resources indicated by the UL CI.

[0260] For example, when the UL CI indicates a specific time and / or frequency resource region as described in Implementation Mode A4, the UE may receive an indication or configuration of the time granularity and / or frequency granularity of the UL CI. In this case, the value indicated by the UL CI or the bit field of the ULCI may correspond one-to-one or one-to-many to each symbol group and / or PRB subset of the reference resource region divided according to the granularity. Additionally, as described in Implementation Mode A5, when the UL CI indicates a specific time and / or frequency resource region, the UE may assume that the interval of the configured UL CI MO always indicates an integer multiple of the granularity of the region of the reference resource (especially the time reference resource) for canceling the transmission thereon.

[0261] The operation of the UE to cancel the UL transmission on the resources indicated by the UL CI may be implemented by Figure 2 or Figure 3 the device. For example, referring to Figure 2 , when one or more processors 102 detect (or receive) a UL CI for canceling a specific UL transmission of a valid MO, the UE may cancel the UL transmission on the resources indicated by the UL CI.

[0262] (5) When the UE cancels the UL transmission, the UE may check again whether another UL CI MO is valid for the UL transmission.

[0263] (6) When there is no longer a valid UL CI MO related to the UL transmission, the UL CI monitoring may be stopped.

[0264] Regarding Figure 9 , the following may be additionally considered for the UE operation.

[0265] <Implementation Method A1> When the UE is configured to monitor the UL CI, multiple MOs in which the UL CI will be received by the UE can be configured by specific parameters (or specific RRC parameters) included in the RRC configuration information sent from the BS to the UE. The UE can selectively monitor the valid MOs among the configured MOs.

[0266] The specific parameters can be the ControlResourceSet IE and / or the SearchSpace IE. In particular, the SearchSpace IE can be used to configure whether the UE can receive the UL CI in the MO indicated by the specific parameter. For example, the SearchSpace IE can be a parameter related to whether it is likely to receive the UL CI in the indicated MO, and the UE can identify the MO in which it is likely to receive the UL CI through the SearchSpace IE sent via the RRC configuration.

[0267] The ControlResourceSet IE can be a parameter related to the resource set in which the UL CI is sent / received. For example, the UE can receive control information from the BS through at least one resource included in the ControlResourceSet IE. That is, the UE can receive the UL CI by monitoring whether the UL CI is sent through the resource area configured by the ControlResourceSet IE in the MO indicated by the SearchSpace IE.

[0268] In other words, the UE can determine whether to monitor the UL CI for multiple MOs and multiple resources configured by specific parameters (such as the SearchSpace IE and the ControlResourceSet IE) received via the RRC configuration information.

[0269] The valid MO can be determined based on the pre-indication to be executed and / or the UL transmission pre-configured for the UE. For example, the valid MO can be a MO that satisfies at least one of the following conditions.

[0270] Alternatively, to monitor only a few MOs to minimize the power consumption and implementation complexity of the UE, the validity of MOs can be determined more strictly. That is, to reduce the number of MOs that the UE needs to monitor, the determination of whether an MO is valid can be restricted. For example, parameters for restricting the number of MOs or the number of conditions for determining the validity of MOs can be sent from the BS to the UE. For example, when receiving parameters for restricting the number of MOs for determining validity from the BS via RRC configuration, the UE can determine the validity of MOs among a limited number of MOs based on the received parameters. In another example, when receiving parameters for restricting the number of valid MOs from the BS via RRC configuration, the UE can determine the validity of MOs among the maximum number of valid MOs based on the received parameters. In some implementations of the present disclosure, when determining whether an MO is valid, the UE can determine an MO as valid only if it satisfies all multiple conditions (e.g., the following Conditions 1 and 2). Additionally, the UE can determine the reference UL resource (i.e., the reference resource region) indicated by one UL CI based on the received parameters (e.g., SearchSpace IE and TDD-UL-DL-ConfigCommon IE).

[0271] <Implementation A1-1> (Condition 1) When a UL CI indicating a specific pre-scheduled UL transmission or some radio resources used in the corresponding transmission can be detected in a specific UL CI MO, the UE can determine that Condition 1 is satisfied. According to Condition 1, the UE can receive only the UL CIs that can indicate the UL radio resources in which the UE is scheduled, and thus unnecessary monitoring of UL CIs by the corresponding UE can be prevented. Figure 10 and Figure 11 is a diagram for explaining an example of the conditions for determining a valid UL CI MO.

[0272] In some implementations of the present disclosure, when a UL CI can indicate a pre-scheduled transmission via a HARQ process ID, etc., the UE can determine that the UL CI MO existing between the time of receiving the scheduling message and the end of the corresponding transmission satisfies Condition 1. This can be useful when the UE cancels a specific scheduling indicated by the UL CI.

[0273] Alternatively, when a UL CI indicates a specific time and / or frequency resource region, and more specifically, when a UL CI indicates a part of a specific reference resource region, the UE can determine that the corresponding UL CI MO satisfies Condition 1 when the resource region used in the specific pre-scheduled UL transmission is included in the reference resource region of the UL CI to be received in the specific UL CI MO. Refer to Figure 10When UL transmission #2, #3, or #4 is dynamically scheduled for the UE via DCI or semi-statically scheduled via RRC, the UE may monitor the UL CI in MO1 for the UL CI. In contrast, UL transmission #1 and UL transmission #5 may not overlap (in terms of time) with reference resource region #1 in which the transmission will cancel the UL CI to be received in MO1, and thus even if UL transmission #1 or UL transmission #5 is scheduled for the UE, the UE may not perform UL CI monitoring in MO1 for UL transmission #1 or UL transmission #5.

[0274] For example, when the UL CI to be received in a specific UL CI MO has a specific frequency domain as the reference resource region, the UE may determine that the corresponding UL CI MO meets condition 1 when a pre-scheduled specific UL transmission uses a part of the corresponding reference resource region.

[0275] In another example, when Y symbols after X symbols from the time of receiving the UL CI correspond to the reference resource region in the time domain, the UE may determine that the UL CI MO existing between the time X + Y symbols before the time of a pre-scheduled specific UL transmission and the time X symbols before the end of the corresponding UL transmission meets condition 1. In other words, when the time domain reference resource region of the UL CI to be received in a specific UL CI MO corresponds to Y symbols after X symbols from the time of receiving the UL CI, if i) the start of the pre-scheduled specific UL transmission is the time X + Y symbols before the time of receiving the UL CI, and ii) the end of the specific UL transmission is the time X symbols after the time of receiving the UL CI, the corresponding UL CI MO may be determined to meet condition 1. Refer to Figure 10 Regarding UL transmissions #2, #3, and #4, MO1 may be determined to meet condition 1. Refer to Figure 11 It can be determined that MO2 is valid for UL CI monitoring for UL transmission #x, while MO1 and MO2 are invalid for UL CI monitoring for UL transmission #x. This method may be useful when the UE cancels the UL transmission or a part of the transmission using the indicated resource region.

[0276] In some implementations of the present disclosure, in order to receive an indication of a UL CI for more approximately representing a resource region in which a specific UL transmission is cancelled, when a resource region used by a pre-scheduled specific UL transmission is included as K symbols or more in a reference resource region of a UL CI to be received in a specific UL CI MO, the UE may determine that the corresponding UL CI MO meets Condition 1. This may be to save PDCCH resources and reduce the possibility of PDCCH collisions by reducing the number of cases in which the BS sends multiple UL CIs to cancel one transmission. Here, K may be a convention or predefined value, or may be a value determined by L1 signaling (e.g., PDCCH) and / or higher layer signaling of the BS.

[0277] The reference resource region (e.g., for time domain X and Y) may be a convention or predefined region of each domain as a time / frequency resource region or may be a resource region determined by L1 signaling and / or higher layer signaling of the BS.

[0278] <Implementation A1-2> (Condition 2) When a specific UL CI MO (or the start or end of the MO) is separated from a pre-scheduled specific UL radio resource (or the start or end of the radio resource) by a predetermined time (N symbols), the UE may determine that the UL CI MO is an MO that meets Condition 2. Condition 2 may be used to ensure the processing time required for decoding, information interpretation, and / or UL transmission cancellation processes during the process of the UE receiving the UL CI in the MO.

[0279] When considering Condition 2, the predetermined N may be determined according to at least one of the following.

[0280] - The processing capability related to the UL CI of the corresponding UE;

[0281] - The timing advance of the corresponding UE;

[0282] - A convention or predefined value; and / or

[0283] - A value indicated and / or configured to the corresponding UE by L1 signaling and / or higher layer signaling of the BS.

[0284] The processing capability related to the UL CI of the UE may be redefined for the UL CI, or the existing processing capability of the UE defined for the PDSCH or PUSCH may be reused.

[0285] The following table shows the processing time depending on the UE processing capabilities. In particular, Table 10 shows an example of the PDSCH processing time for the PDSCH processing capability #1 of the UE, Table 11 shows an example of the PDSCH processing time for the PDSCH processing capability #2 of the UE, Table 12 shows an example of the PUSCH preparation time for the PUSCH timing capability #1 of the UE, and Table 13 shows an example of the PUSCH preparation time for the timing capability #2 of the UE. In Table 10, in the case of N 1,0 when the PDSCH DMRS position l of the additional DMRS 1 = 12, N 1,0 = 14, otherwise, N 1,0 = 13 (refer to Section 7.4.1.1.2 of 3GPP TS 38.211).

[0286] Table 10

[0287]

[0288] Table 11

[0289] u / SCS PDSCH decoding time N1 [symbols] 0 / 15 kHz 3 1 / 30 kHz 4.5 2 / 60 kHz 9 for frequency range 1

[0290] Table 12

[0291] u / SCS PUSCH preparation time N2 [symbols] 0 / 15 kHz 5 1 / 30 kHz 5.5 2 / 60 kHz 11 for frequency range 1

[0292] Table 13

[0293] u / SCS PUSCH preparation time N2 [symbols] 0 / 15 kHz 10 1 / 30 kHz 12 2 / 60 kHz 23 3 / 120 kHz 36

[0294] For example, the N2 capability defined for PUSCH can be reused without change, or a specific ratio R or offset d value of the processing time T_proc determined by the N2 capability (e.g., ceil(T_proc*R) or ceil(T_proc - d)) can be used to determine a predetermined time N. This value can be assumed as the processing time of the UL CI. Here, R and d can be agreed or predefined values, or can be values determined via the L1 signaling and / or higher layer signaling of the BS.

[0295] <Implementation A2> When using Implementation A1 or when the UE selectively monitors the UL CI based on a pre-indication to be executed similar to Implementation A1 and / or a specific UL transmission pre-configured for the UE, the UE can, in some implementations, only consider the first X symbols (or the start of the UL transmission) of the specific UL transmission. That is, the UE and the BS can use the position of the radio resource region allocated for the specific UL transmission to send a valid MO, and in this case, it can be determined whether the MO is valid based on a predetermined number of symbols starting only from the first symbol of the radio resource region allocated for the specific UL transmission.

[0296] Therefore, the UL CI can be detected and interpreted before the start time of the cancelled UL transmission to allow the UE to cancel the entire UL transmission. Additionally, the transmission cancellation may always occur in the front part of the UL transmission, thus preventing the UL transmission from being stopped halfway. For example, it can be assumed that only the first X symbols for a specific transmission are the transmission resources, and then it can be checked whether each condition considered in Implementation A1 is met.

[0297] In some implementations, Implementation A2 can be used only in specific types of UL transmissions. For example, Implementation A2 can be used only in PUCCH and / or PRACH. This can be to always cancel the entire transmission of the corresponding transmission channel because it is difficult to decode PUCCH or PRACH when the UL transmission is stopped halfway.

[0298] In the case of a UL transmission to which Implementation A2 is applied, when the UE is instructed to cancel the first X symbols of the transmission (or the start of the UL transmission), the UE can cancel the entire corresponding transmission.

[0299] X can be a convention or predefined value, or can be a value determined via the L1 signaling of the BS and / or higher layer signaling.

[0300] <Implementation A3> When using Implementation A1 or when the UE selectively monitors the UL CI based on a pre - indication to perform similar to Implementation A1 and / or a specific UL transmission pre - configured for the UE, the specific UL transmission can include at least one of the UL transmissions listed below in some implementations. This can be to prevent the cancellation of URLLC services through the UL CI and to prevent unnecessary UL CI monitoring when the UL CI cannot cancel URLLC services.

[0301] - PUSCH for low - priority services;

[0302] - PUCCH for low - priority services;

[0303] - SRS transmission for low - priority services;

[0304] - PRACH other than for initial access purposes (e.g., PRACH for receiving UL grants).

[0305] Channels / transmissions for low-priority services may refer to eMBB services or non-URLLC services. Alternatively, when the priority for each channel / transmission is indicated or configured via L1 signaling, higher-layer signaling, DCI format, CRC scrambling, RNTI, CORESET, and / or search space, the channel / transmission may refer to a channel / transmission that is indicated or configured with a particular level or lower priority (e.g., low priority when two priorities are used).

[0306] When it is difficult to distinguish the priority of each service or when the priority for each channel / transmission is indicated or configured via L1 signaling and / or higher-layer signaling, the UE may assume that the corresponding channel / transmission is a channel / transmission with low priority. In other words, the UE may consider at least one of the listed transmissions to use implementation A1 (e.g., to determine the validity of the MO) without distinguishing service priorities. According to this method, when the UL CI is sent statically or group-commons by the UE without being broadcast, the BS may send the UL CI in consideration of the UL transmissions scheduled for the corresponding UE, and thus may advantageously consider not canceling URLLC services at the BS level as much as possible. This method may simplify the UE implementation.

[0307] <Implementation A3-1> When using implementation A1 or when the UE selectively monitors the UL CI based on a pre-indication to perform similarly to implementation A1 and / or a specific UL transmission pre-configured for the UE, if the specific UL transmission corresponding to the specific UL transmission corresponds to at least one of all or some of the cases listed below in some implementations, the corresponding transmission may be excluded from the specific UL transmission. In other words, when using implementation A1, the corresponding UL transmission may not be considered. Therefore, when a specific transmission is canceled by the UL CI, the validity of the UL CI MO may no longer be determined based on the corresponding UL transmission, thereby minimizing unnecessary UL CI monitoring. In particular, even when the UL CI only indicates the cancellation of a partial area of the resource, unnecessary UL CI monitoring may be minimized when the UE cancels all transmissions or transmissions after the indicated area.

[0308] - When at least one partial radio resource area of a specific transmission is canceled (in other words, when indicated by the UL CI);

[0309] - When the entire radio resource area of a specific transmission is canceled;

[0310] - When the entire DMRS area of a specific transmission is canceled;

[0311] - When the specific transmission is PUCCH or PRACH and a partial radio resource area is canceled; and / or

[0312] - When a partial radio resource region of a specific transmission is cancelled and a phase discontinuity occurs in the corresponding radio resource (e.g., when the radio resource of M or more symbols is cancelled and a phase discontinuity occurs. Here, the symbol length M can be a convention or predefined value, or can be determined by the capabilities of the UE).

[0313] <Implementation A4> When the UL CI indicates a specific time and / or frequency resource region, and more specifically, when the UL CI indicates a part of a specific reference resource region, the UE can receive an indication or configuration of the time granularity and / or frequency granularity of the UL CI in some implementations. The value indicated by the UL CI or the bit field of the UL CI can correspond one-to-one or one-to-many to each symbol group and / or PRB subset of the reference resource region divided according to the granularity. In some implementations of the present disclosure, the following can be considered to determine the symbol group and PRB subset according to a given time / frequency granularity (see Implementations A4-1 and A4-2).

[0314] Therefore, when determining the reference resource region of each UL CI based on the UL CI MO, the same resource grid can be used in the corresponding UL CI, and even the same time / frequency region can be indicated in different UL CI MOs. Therefore, when the BS intends to cancel the UL transmission in a specific resource region through the UL CI, redundant cancellation of a wide area can be prevented.

[0315] <Implementation A4-1> When the UE determines the symbol group according to a given time granularity, the system frame number SFN = 0 can be used as a reference point of the resource grid, and the reference resource region can be divided into symbol groups.

[0316] For example, when the given time granularity is P and the reference resource region exists at N start ref,time away from SFN = 0 and has a length of N size ref,time , the reference resource region can include the following symbol groups.

[0317] - The first symbol group can start at N from SFN = 0 start ref,time .

[0318] - The length of the first symbol group can be P - (N start ref,time mod P).

[0319] - The length of the last symbol group can be (N start ref,time + N size ref,time) modulo P. When the corresponding value is 0 or equal to or less than 0, the length of the last symbol group can be P.

[0320] - The length of other symbol groups can be P.

[0321] The symbol groups can be continuously mapped to UL symbols and / or flexible symbols or can be mapped to consecutive symbols without distinguishing the transmission direction. When the symbol groups are mapped to consecutive symbols without distinguishing the transmission direction, if there is no at least one UL or flexible symbol in the corresponding symbol group, the corresponding symbol group can be excluded from the reference resource region.

[0322] N can be derived according to the starting symbol of the reference resource region by the following formula start ref,time : N start ref,time = (SFN * numberOfSlotsPerFrame * numberOfSymbolsPerSlot + slot number in the frame * numberOfSymbolsPerSlot + symbol number in the slot). Here, numberOfSlotsPerFrame and numberOfSymbolsPerSlot are the number of consecutive slots per frame and the number of consecutive symbols per slot respectively. "Slot number in the frame" can be the slot index in the frame including the starting symbol of the reference resource region, and "symbol number in the slot" can be the starting symbol index in the slot including the starting symbol of the reference resource region.

[0323] <Implementation A4-2> When the UE determines the PRB subset according to a given frequency granularity, the common resource block 0 can be used as the reference point of the resource grid, and the reference resource region can be divided into PRB subsets.

[0324] For example, when the given frequency granularity is P and the reference resource region exists at N start ref,freq away from the common resource block 0 and has a length of N size ref,freq , the reference resource region can include the following PRB subsets.

[0325] - The first PRB subset can start at N start ref,freq away from the common resource block 0.

[0326] - The length of the first PRB subset can be P - (N start ref,freq modulo P).

[0327] - The length of the last PRB subset can be (N startref,freq +N size ref,freq ) mod P. When the corresponding value is 0 or equal to or less than 0, the length of the last PRB subset can be P.

[0328] - The length of other PRB subsets can be P.

[0329] When the reference resource region is determined by the active BWP, N start ref,freq can be determined based on N start BWP the value N' start ref,freq determined, N start BWP is the start time of the active BWP starting from common resource block 0. For example, N start ref,freq = N start BWP + N' start ref,freq .

[0330] <Implementation A5> When the UL CI indicates a specific time and / or frequency resource region, and more specifically, when the UL CI indicates a part of a specific reference resource region, the UE can assume in some implementations that the interval of the configured UL CI MO always indicates an integer multiple of the granularity of the region of the reference resource (especially the time reference resource) in which the transmission is cancelled. Therefore, when the reference resource region is determined based on the interval of the UL CI MO, the same time / frequency resource region can be indicated by different UL CIs. Thus, when the BS intends to cancel the transmission in a specific resource region through the UL CI, redundant cancellation of a wide region can be prevented.

[0331] In some implementations, for example, when a UL CI indicates the region of the reference resource region in which the transmission is cancelled in units of X symbols, the UE can assume that the MO in which the UL CI is to be received is configured at an interval that is an integer multiple of X. Alternatively, when a UL CI indicates the region of the reference resource region in which the transmission is cancelled in units of X symbols, the UE can not assume that the MO in which the UL CI is to be received is not configured at an interval that is an integer multiple of X.

[0332] <Implementation A6> When there is an available DMRS in the front part of the UL transmission after cancellation (i.e., in the front part of the remaining resources among the UL transmission resources that are not indicated by the UL CI), and there is a sufficient timing gap between the UL CI and the start of the cancelled UL transmission (i.e., the start of the UL resources before cancellation among the UL resources of the UL transmission cancelled by the ULCI), the front part of the UL transmission after cancellation can be transmitted.

[0333] Reusing the remaining resources to resume UL transmission after a part of the UL transmission has been cancelled, i.e., "stop and resume" of UL transmission, may not be supported. Therefore, when UL cancellation is indicated once, the UE may discard the indication and UL transmission on the subsequent resources. It may be necessary to clarify the UE behavior for the front part of the UL transmission. Even if the UL transmission partially overlaps with the resources indicated by the UL CI, it may be considered to discard the entire UL transmission in the time slot. However, this may be inefficient when the resources reserved for the UL transmission of another UE (i.e., the resources on which the UL transmission of another UE has been cancelled) span only one or two OFDM symbols. When there is an available DMRS (which has not been cancelled by the UL CI) in the front part of the UL transmission and there is a sufficient timing gap between the UL CI and the start of the cancelled UL transmission (i.e., the start of the UL resources before cancellation by the UL CI), it may be beneficial to transmit the front part of the UL transmission.

[0334] For example, when the time domain / frequency domain is indicated to the UE by the UL CI, the UE may cancel (discard, puncture, or rate-match) the UL transmission in the time domain / frequency domain and subsequent resources, and the BS may assume this UE operation. When the front part of the UL transmission has an available DMRS symbol, the BS may receive a part of the UL transmission. Therefore, at least in the case of PUSCH, when the BS receives the front part of the UL transmission and the front part of the UL transmission has an available DMRS symbol, the BS may indicate CBG-level retransmission of the remaining part in order to receive the remaining part.

[0335] <Implementation Method A7> The minimum processing time for the UL CI can be given by one of the values included in the minimum processing time capability for PUSCH configured by the SCS of the DL BWP in which the UE receives the PDCCH having that UL CI (e.g., T stated in 3GPP TS 38.214) proc,2 ). The UE may report to the BS whether a specific processing time (type 1 processing time and / or type 2 processing time) is available for each SCS configuration, and the BS may configure one of the type 1 processing time and type 2 processing time to the UE. For example, the UE and the BS may use the PUSCH processing time available to the UE among the SCS values of the DL BWP in which the PDCCH is received, and may use one of the type 1 processing time and type 2 processing time when both the type 1 processing time and type 2 processing time are available. To enable different UEs to have the same timing gap, the minimum processing time for the UL CI can be used as the timing gap between the end symbol of the PDCCH CORESET and the start of the reference time region.

[0336] When the UL CI signaling is group common, it may not be necessary to configure different offsets for different UEs. In the case of assuming the SCS used to derive the minimum processing time for ULCI (e.g., the value of T proc,2 ), there is no transmission preparation, so it may be reasonable to only consider the SCS of the DL BWP carrying ULCI. When the UE considers DL and UL parameter sets for PUSCH / PUCCH, different UEs with different UL BWPs can have different timing gaps between the end symbol of the PDCCH CORESET and the start of the reference time region, thus causing redundant cancellation.

[0337] <Implementation A7-1> can use the minimum value among the SCSs provided together by multiple UEs that receive the same UL CI to determine the minimum processing time for UL CI and the timing gap between the end symbol of the PDCCH CORESET and the start of the reference time region.

[0338] UEs in a cell can identify information about the available SCSs in the cell through the frequencyInfoUL of the UplinkConfigCommonSIB IE, which is usually received through the RRC signaling of the BS, that is, the RRC parameters received through the FrequencyInfoUL-SIB IE (see 3GPP TS 38.331). Additionally, UEs that receive the same UL CI can receive the same PDCCH, so the SCS of the DL BWP in which the UL CI is received can be the same.

[0339] In some implementations of the present disclosure, in order to determine the size or length of the time domain and / or frequency domain of the reference resource region used in UL CI, the minimum SCS among these SCSs can be selected. Specifically, the processing time of ULCI can be assumed using the smaller value of the SCS configured through the FrequencyInfoUL-SIBIE and the SCS of the PDCCH on which the UL CI is received. For example, for the serving cell, the UE can determine the first symbol of the reference UL resource for UL CI as the first symbol after T proc,2 +d from the end of the reception of the PDCCH in which the UE detects the UL CI, where d can be provided according to delta_offset_d. delta_offset_d can be provided to the UE through the RRC signaling of the BS. T proc,2 can correspond to the PUSCH processing capability 2, assuming d 2,1= 0, where u is the minimum SCS configuration among the SCS provided by FrequencyInfoUL-SIB and the SCS of the active DL BWP used for monitoring the PDCCH for UL CI detection by the UE for the serving cell.

[0340] Alternatively, the BS may explicitly indicate one of the SCSs to be used in the assumption of the UL CI processing time via RRC parameters. Thus, the SCS to be used can be directly configured, or it can be configured whether to use the minimum SCS among the SCSs included in FrequencyInfoUL-SIB or the SCS of the DL BWP in which the UL CI is received. In other words, the BS can directly / indirectly configure the SCS set for UL CI for the UE, and the UE can select the minimum SCS among them.

[0341] Therefore, the UE and the BS can select the smallest possible SCS, so that the UE can ensure sufficient UL CI processing time, thereby reducing the UE implementation difficulty.

[0342] <Implementation A8> When the UL CI indicates a specific time and / or frequency resource region, and more specifically, when the ULCI indicates a part of a specific reference resource region, the length of the reference resource region, especially the length in the time domain, can be determined as the period or interval of the UL CI MO or an integer multiple of the period or interval. Thus, one UL CI can use the resources of the UL CI MO or more intervals as the reference resource region, so that the UL CI can indicate the entire resource region available to the UE.

[0343] When determining the UL CI MO through the search space configuration of the existing system, it may be difficult to specify the interval of the UL CI MO. The MO configured through the search space configuration included in the RRC configuration information is determined according to the monitoring pattern in one time slot and the time slot-level period. Therefore, when multiple UL CI MOs are configured in one time slot, the intervals between the UL CIs may not be the same. Thus, in this case, in order to determine the interval or period of the UL CI MO, the following methods can be considered.

[0344] - The actually configured UL CI interval can be ignored, and the interval between the MOs of the UL CI can be determined as the search space period (e.g., the value of monitoringSlotPeriodicityAndOffset in the SearchSpace IE). To effectively use this method, when the search space period is greater than 1, it can be assumed that only one UL CI MO is configured in the time slot. In other words, it can be assumed that two or more UL CI MOs are not configured in one time slot.

[0345] - The interval of the UL CI MO can be determined as the average of the actually configured UL CI intervals. For example, when N UL CI MOs are configured in one time slot, N different intervals can be configured for the corresponding UL CI MOs, and in this case, the period / interval for determining the reference resource region can be the average of the intervals.

[0346] <Implementation A9> When the UL CI indicates a specific time and / or frequency resource region, and more specifically, when the ULCI indicates a part of a specific reference resource region, the length of the reference resource region, especially the length in the time domain, can be different for each UL CI MO. Therefore, when different UL CI MOs are spaced apart at irregular intervals, the entire UL resource region can be effectively represented by the ULCI. In this case, to determine the UL CI reference resource region or the length of the reference resource region, at least one of the following methods can be considered.

[0347] - The length of the reference resource region of the UL CI received in a specific UL CI MO can be determined as the interval from the corresponding ULCI MO to the next UL CI MO or an integer multiple of the corresponding interval. For example, the interval from the start or last symbol of the CORESET in which a specific ULCI MO is received to the start or last symbol of the CORESET in which the next UL CI MO is received or an integer multiple of the corresponding interval can be determined as the reference resource region or the length of the reference resource region. In this case, the following method can be used to determine the following UL CI MO.

[0348] >> Option 1: The UL CI MO that is closest to the corresponding UL CI MO (i.e., the first one after the corresponding UL CI MO in time) among the UL CI MOs in which reception is possible, taking into account the TDD configuration received by the UE (e.g., TDD-UL-DL-Configdedicated and TDD-UL-DL-Configcommon) and the slot format indication, can be determined as the next UL CI MO. Therefore, considering the UL CI MO in which the actual reception of the UE occurs, each UL CI MO can represent the entire UL resource region.

[0349] >> Option 2: The next UL CI MO can be determined as the UL CI MO among the UL CI MOs where reception is possible, considering the TDD configuration received by the UE (e.g., TDD-UL-DL-Configdedicated and TDD-UL-DL-Configcommon), that is closest to the corresponding UL CI MO (i.e., the first one after the corresponding UL CI MO in time). Thus, the reference resource region can be determined semi-statically.

[0350] >> Option 3: The next UL CI MO can be determined as the UL CI MO among the UL CI MOs where reception is possible, considering the cell common TDD configuration received by the UE (e.g., TDD-UL-DL-Configcommon), that is closest to the corresponding UL CI MO (i.e., the first one after the corresponding UL CI MO in time). Thus, a group of UEs for monitoring UL CI can have the same reference resource region or reference resource region length.

[0351] - The length of the reference resource region of the UL CI received in a specific UL CI MO can be determined as the search space period (e.g., the value of monitoringSlotPeriodicityAndOffset in the SearchSpace IE) or an integer N times the corresponding time length. In this case, the following method can be used to determine N.

[0352] >> Option 1: Considering the TDD configuration received by the UE (e.g., TDD-UL-DL-Configdedicated and TDD-UL-DL-Configcommon) and the slot format indication, the number of unavailable UL CI MOs (e.g., overlapping with UL symbols) to the next UL CI MO where reception is possible or the number of slots in which the UL CI MO is configured but the available UL CI MO (e.g., in DL symbols) does not exist can be determined as N. Thus, considering the UL CI MO where the actual reception of the UE occurs, the UL CI MO can represent the entire resource region.

[0353] >> Option 2: Considering the TDD configuration received by the UE (e.g., TDD-UL-DL-Configdedicated and TDD-UL-DL-Configcommon), the number of unavailable UL CIMO (e.g., overlapping with UL symbols) for the next UL CI MO where reception is possible or the number of time slots in which UL CI MO is configured but the available UL CI MO (e.g., in DL symbols) does not exist can be determined as N. Thus, the reference resource region can be determined semi-statically.

[0354] >> Option 3: Considering the cell-common TDD configuration received by the UE (e.g., TDD-UL-DL-Configcommon), the number of unavailable UL CIMO (e.g., overlapping with UL symbols) for the next UL CI MO where reception is possible or the number of time slots in which UL CI MO is configured but the available UL CI MO (e.g., in DL symbols) does not exist can be determined as N. Thus, a group of UEs for monitoring UL CI can have the same reference resource region or reference resource region length.

[0355] On the BS side

[0356] In the following, the implementation manners described above in terms of the UE will be described again in terms of the BS.

[0357] Figure 12 FIG. is a diagram illustrating UE operations according to some implementations of the present disclosure. In the present disclosure, the BS may send the UL CI of the UE only in the valid MOs in which the UE can cancel the UL transmission. In the following, examples of some implementations of the present disclosure will be described.

[0358] (1) The BS may receive a scheduling request from the URLLC UE (S1210).

[0359] The operation of the UE receiving UL scheduling from the BS may be implemented by, for example Figure 2 or Figure 3 such devices. For example, referring to Figure 2 , one or more processors 102 may control one or more transceivers 106 and / or one or more memories 104 to receive a scheduling request from the UE and one or more transceivers 106 may receive a scheduling request from the UE.

[0360] (2) The BS can determine the resources that can be cancelled among the resources pre-allocated to other UEs based on the UL CI MO configured for other UEs (S1220). For example, the BS can use the UL CI in the configured UL CI MO to identify the radio resource regions to be cancelled by the BS, including the resources pre-allocated to eMBB UEs. Thus, the BS can identify whether there is a valid UL CI MO for the resources pre-allocated to a UE.

[0361] The operation of identifying the resources that can be cancelled among the pre-allocated resources based on the UL CI MO configured for the BS can be implemented by, for example Figure 2 or Figure 3 such devices. For example, one or more processors 102 can identify the resources that can be cancelled among the pre-allocated resources based on the UL CI MO configured by the BS for eMBB UEs.

[0362] (3) The BS can (a) allocate to the URLLC UE the resources that can be cancelled among the resources pre-allocated for the eMBB UE (S1230a), and can (b) determine the valid ULCI MO for UL CI transmission based on the resources pre-allocated to the eMBB UE (S1230b).

[0363] For example, the BS can identify the valid MO among multiple UL MOs for transmitting the UL CI. For example, the BS can use the methods described in Implementation B1 and / or B2 to identify the valid MO for transmitting the UL CI to notify the eMBB UE of the resources cancelled for allocation to the URLLC UE among the pre-allocated resources. Specifically, as described above in Implementation B1-1 and / or B1-2, the MOs that meet specific conditions can be identified as valid MOs, and in this case, the specific conditions can be the same as or similar to the conditions for the UE to identify the valid MO. In addition, only a part of a specific UL transmission can be subject to cancellation.

[0364] For example, the BS may deconfigure UL transmissions to occur only in a predetermined number of symbols starting from the first symbol of a specific UL transmission. In some implementations of the present disclosure, the intervals of multiple configured MOs may be determined according to Implementation Modes B8 and / or B9 below. For example, the interval of an MO may be determined by a search space period (e.g., the value of monitoringSlotPeriodicityAndOffset in the SearchSpace IE) or may be determined as the average of the actually configured UL CI intervals. For example, when N UL CI MOs are configured in one time slot, different N intervals may be configured for each UL CI MO, and in this case, the period / interval for determining the reference resource region may be the average of the intervals.

[0365] (a) The operation of allocating resources cancellable among the resources pre-allocated for eMBB UEs to the URLLC UE and (b) determining valid UL CI MOs for UL CI transmissions based on the resources pre-allocated by the BS to the eMBB UE may be implemented by Figure 2 or Figure 3 the device. For example, referring to Figure 2 , one or more processors 102 may control the BS to (a) allocate resources cancellable among the resources pre-allocated for eMBB UEs to the URLLC UE, and (b) determine valid UL CI MOs for UL CI transmissions based on the resources pre-allocated to the eMBB UE.

[0366] (4) The BS may (a) send a UL grant for resource allocation to the URLLC UE (S1240a), and may (b) send a UL CI for cancellation of transmission to the eMBB UE in the valid UL CI MO (S1240b).

[0367] In some implementations of the present disclosure, at least one of the following may be considered to determine a reference resource region related to the UL CI or the length of the reference resource region.

[0368] - The length of the reference resource region of the UL CI transmitted in a specific UL CI MO may be determined as the interval from the corresponding UL CI MO to the next UL CI MO or an integer multiple of the corresponding interval. For example, the interval from the start or last symbol of the CORESET in which a specific UL CI MO is received to the start or last symbol of the CORESET in which the next UL CI MO is received or an integer multiple of the corresponding interval may be determined as the reference resource region or the length of the reference resource region. In this case, the following method may be used to determine the following UL CI MO.

[0369] >Option 1: The next UL CI MO can be determined as the UL CI MO among the available UL CI MOs that takes into account the TDD configuration sent by the BS (e.g., TDD-UL-DL-Configdedicated and TDD-UL-DL-Configcommon) and the slot format indication and is closest to the corresponding UL CI MO (i.e., the first one after the corresponding UL CI MO in time). Therefore, this option makes it possible for the UL CI MO to represent the entire UL resource region considering the UL CI MO in which the actual reception of the UE occurs.

[0370] >Option 2: The next UL CI MO can be determined as the UL CI MO among the available UL CI MOs that takes into account the TDD configuration sent by the BS (e.g., TDD-UL-DL-Configdedicated and TDD-UL-DL-Configcommon) and is closest to the corresponding UL CI MO (i.e., the first one after the corresponding UL CI MO in time). Therefore, the reference resource region can be determined semi-statically.

[0371] >Option 3: The next UL CI MO can be determined as the UL CI MO among the available UL CI MOs that takes into account the cell-common TDD configuration sent by the BS (e.g., TDD-UL-DL-Configcommon) and is closest to the corresponding UL CI MO (i.e., the first one after the corresponding UL CI MO in time). Therefore, a group of UEs used to monitor the UL CI can have the same reference resource region or reference resource region length.

[0372] - The length of the reference resource region of the UL CI sent in a specific UL CI MO can be determined as the search space period (e.g., the value of monitoringSlotPeriodicityAndOffset in the SearchSpace IE) or an integer N times the corresponding time length. In this case, the following method can be used to determine N.

[0373] > Option 1: Considering the TDD configuration sent by the BS (e.g., TDD-UL-DL-Configdedicated and TDD-UL-DL-Configcommon) and the slot format indication, the number of unavailable UL CI MOs (e.g., overlapping with UL symbols) to the next available UL CI MO or the number of slots in which UL CI MO is configured but the available UL CI MO (e.g., in DL symbols) does not exist can be determined as N. Therefore, considering the UL CI MO where the actual reception of the UE occurs, the ULCI MO can represent the entire resource area.

[0374] > Option 2: Considering the TDD configuration sent by the BS (e.g., TDD-UL-DL-Configdedicated and TDD-UL-DL-Configcommon), the number of unavailable UL CI MOs (e.g., overlapping with UL symbols) to the next available UL CI MO or the number of slots in which UL CI MO is configured but the available UL CI MO (e.g., in DL symbols) does not exist can be determined as N. Therefore, the reference resource area can be determined semi-statically.

[0375] > Option 3: Considering the cell-common TDD configuration sent by the UE (e.g., TDD-UL-DL-Configcommon), the number of unavailable UL CI MOs (e.g., overlapping with UL symbols) to the next available UL CI MO or the number of slots in which UL CI MO is configured but the available UL CI MO (e.g., in DL symbols) does not exist can be determined as N. Therefore, a group of UEs for monitoring UL CI can have the same reference resource area or reference resource area length.

[0376] (a) The operation of the BS sending a UL grant for resource allocation to the URLLC UE and (b) the BS sending a UL CI for cancellation of transmission to the eMBB UE in the valid UL CI MO can be implemented by, for example Figure 2 or Figure 3 the device. For example, referring to Figure 2, one or more processors 102 may control one or more transceivers 106 and / or at least one memory 104 to (a) send a UL grant for resource allocation to a URLLC UE, and (b) send a UL CI for cancellation of transmission to an eMBB UE in a valid UL CI MO, and one or more transceivers 106 may (a) send a UL grant for resource allocation to a URLLC UE, and (b) send a UL CI for cancellation of transmission to an eMBB UE in a valid UL CI MO, as described in Implementation Modes B1 to B9.

[0377] Regarding Figure 12 , the following may additionally be considered for BS operation.

[0378] <Implementation Mode B1> When the BS configures a UE to monitor a UL CI, multiple MOs in which to send the UL CI to the UE may be configured by specific parameters (or specific RRC parameters) included in the RRC configuration information. The BS may send the UL CI by selectively using the valid MOs of the configured MOs.

[0379] The specific parameters may be a ControlResourceSet IE and / or a SearchSpace IE. In particular, the SearchSpace IE may be used to configure whether the UE can receive a UL CI in the MO indicated by the specific parameter. For example, the SearchSpace IE may be a parameter related to whether it is likely to receive a UL CI in the indicated MO, and the UE may identify the MO in which it is likely to receive a UL CI through the SearchSpace IE sent via RRC configuration.

[0380] The ControlResourceSet IE may be a parameter related to the resource set in which to send / receive the UL CI. For example, the UE may receive control information from the BS through at least one resource included in the ControlResourceSet IE. That is, the UE may receive the UL CI by monitoring whether the UL CI is sent through the resource area configured by the ControlResourceSet IE in the MO indicated by the SearchSpace IE.

[0381] In other words, the BS may send the UL CI through multiple MOs and multiple resources configured by specific parameters (e.g., SearchSpace IE and ControlResourceSet IE) sent via RRC configuration information.

[0382] For example, the BS may send UL CI by selectively using at least one valid MO among multiple configured MOs. In some implementations of the present disclosure, the BS may send UL CI to the eMBB UE by using as many valid MOs as possible, because the reliability can be improved by sending UL CI multiple times for URLLC. In some implementations of the present disclosure, the BS may arbitrarily select an MO among at least one valid MO and may send UL CI.

[0383] Therefore, when sending UL CI by selectively using at least one valid MO, if only a specific MO is selected among the MOs, it is possible to prevent a situation where the BS is unable to send UL CI in the specific MO due to PDCCH blocking caused by the scheduling of another UE.

[0384] The valid MO may be determined based on a pre-indication to be performed by the BS and / or UL transmission pre-configured for the UE. For example, in this case, the valid MO may be an MO that satisfies at least one of the following. Alternatively, in order to minimize the power consumption and implementation difficulty of the UE by monitoring fewer MOs, the validity of the MO may be determined more strictly. That is, in order to reduce the number of MOs that the UE needs to monitor, the validity of the MO may be determined restrictively. In another example, an MO may be determined to be valid only when all of the following conditions are met.

[0385] <Implementation B1-1> (Condition 1) When the UL CI indicating a specific UL transmission of a pre-scheduled can be sent in a specific UL CI MO or some radio resources used in the corresponding transmission, the BS may determine that Condition 1 is satisfied. According to Condition 1, the UE may receive only the UL CI that can indicate the UL radio resources in which the UE is scheduled, so that unnecessary monitoring of UL CI by the corresponding UE can be prevented.

[0386] In some implementations of the present disclosure, when the UL CI can indicate a pre-scheduled transmission by means of a HARQ process ID, etc., the BS may determine that the UL CI MO existing between the time of sending a scheduling message for UL transmission and the end of the transmission of the UL transmission satisfies Condition 1. This may be useful when the BS cancels a specific scheduling indicated by the UL CI.

[0387] Alternatively, when the UL CI indicates a specific time and / or frequency resource region, and more specifically, when the UL CI indicates a part of a specific reference resource region, the BS may determine that the corresponding UL CI MO satisfies Condition 1 when the resource region used in the specific UL transmission of the pre-scheduled is included in the reference resource region of the UL CI to be received in the specific UL CI MO. Refer to Figure 10When UL transmission #2, #3, or #4 is dynamically scheduled for the UE by DCI or semi-statically scheduled via RRC, the BS may send the UL CI for UL transmission #2, #3, or #4 in MO1 for the UL CI. In contrast, UL transmission #1 and UL transmission #5 may not overlap with reference resource region #1 (in terms of time) in which the transmission will be cancelled by the UL CI received in MO1. Thus, even if UL transmission #1 or UL transmission #5 is scheduled for the UE, the BS may not send the UL CI for UL transmission #1 or UL transmission #5 in MO1.

[0388] For example, when the UL CI to be sent in a specific UL CI MO has a specific frequency domain as the reference resource region, the BS may determine that the corresponding UL CI MO meets condition 1 when a pre-scheduled specific UL transmission uses a part of the corresponding reference resource region.

[0389] In another example, when Y symbols after X symbols from the time of sending the UL CI correspond to the reference resource region in the time domain, the BS may determine that the UL CI MO existing between the time X+Y symbols before the start of a pre-scheduled specific UL transmission and the time X symbols before the end of the corresponding UL transmission meets condition 1. In other words, when the time domain reference resource region of the UL CI to be sent in a specific UL CI MO corresponds to Y symbols after X symbols from the time of sending the UL CI, it can be determined that the corresponding UL CI MO meets condition 1 if i) the start of the pre-scheduled specific UL transmission is the time X+Y symbols before the time of sending the UL CI, and ii) the end of the specific UL transmission is the time X symbols after the time of sending the UL CI. Refer to Figure 10 Regarding UL transmission #2, #3, and #4, it can be determined that MO1 meets condition 1. Refer to Figure 11 It can be determined that MO2 is valid for the UL CI transmission for UL transmission #x, while MO1 and MO2 are invalid for the UL CI monitoring for UL transmission #x. This method can be useful when the BS intends to use the indicated resource region to cancel a UL transmission or a part of the transmission.

[0390] In some implementations of the present disclosure, to indicate a UL CI for more approximately representing a resource region in which a specific UL transmission is cancelled, when a resource region used by a pre-scheduled specific UL transmission is included as K symbols or more symbols in a reference resource region of the UL CI to be sent in a specific UL CI MO, the BS may determine that the corresponding UL CI MO meets Condition 1. This may be to save PDCCH resources and reduce the possibility of PDCCH collisions by reducing the number of cases in which the BS sends multiple UL CIs to cancel one transmission. Here, K may be a convention or predefined value, or may be a value determined by L1 signaling and / or higher layer signaling of the BS.

[0391] The reference resource region (e.g., for the time domain being X and Y) may be a convention or predefined region of each domain as a time / frequency resource region, or may be a resource region determined by L1 signaling and / or higher layer signaling of the BS.

[0392] <Implementation B1-2> (Condition 2) When a specific UL CI MO (or the start or end of the MO) is spaced apart from a pre-scheduled specific UL radio resource (or the start or end of the radio resource) by a predetermined time (N symbols), the BS may determine that the UL CI MO is an MO that meets Condition 2. Condition 2 may be used to ensure the processing time required for decoding, information interpretation, and / or UL transmission cancellation procedures during the process of the UE receiving the UL CI in the MO.

[0393] When considering Condition 2, the predetermined N may be determined according to at least one of the following.

[0394] - The processing capability related to the UL CI of the corresponding UE;

[0395] - The timing advance of the corresponding UE;

[0396] - A convention or predefined value; and / or

[0397] - A value indicated and / or configured to the corresponding UE by L1 signaling and / or higher layer signaling of the BS.

[0398] The processing capabilities related to the UL CI of the UE can be redefined for the UL CI, or the existing processing capabilities of the UE defined for the PDSCH or PUSCH can be reused. For example, the N2 capabilities defined for the PUSCH can be reused without change, or the values of a specific ratio R or offset d of the processing time T_proc determined by the N2 capabilities (e.g., ceil(T_proc*R) or ceil(T_proc - d)) can be used to determine a predetermined time N. This value can be assumed to be the processing time of the UL CI. Here, R and d can be agreed or predefined values, or can be values determined via the L1 signaling and / or higher layer signaling of the BS.

[0399] <Implementation Mode B2> When using Implementation Mode B1 or when the BS selectively uses the UL CI based on a pre - indication to be executed similar to Implementation Mode B1 and / or a specific UL transmission pre - configured for the UE, the BS can, in some implementations, consider only the first X symbols (or the start) of the specific UL transmission. Thus, the UL CI can be detected and interpreted before the start time of the cancelled UL transmission to allow the UE to cancel the entire UL transmission. Additionally, the transmission cancellation may always occur in the front part of the UL transmission, preventing the UL transmission from being stopped halfway. For example, the BS and the UE can assume that only the first X symbols for a specific transmission are the transmission resources, and then can check whether each condition considered in Implementation Mode B1 is met.

[0400] In some implementations, Implementation Mode B2 can be used only in specific types of UL transmissions. For example, Implementation Mode B2 can be used only in the PUCCH and / or PRACH. This can be to always cancel the entire transmission of the corresponding transmission channel, because it is difficult to decode the PUCCH or PRACH when the UL transmission is stopped halfway.

[0401] In the case of a UL transmission to which Implementation Mode B2 is applied, when the UE is instructed to cancel the first X symbols (or the start) of the transmission, the UE can cancel the entire corresponding transmission.

[0402] X can be an agreed or predefined value, or can be a value determined via the L1 signaling and / or higher layer signaling of the BS.

[0403] <Implementation Mode B3> When using Implementation Mode B1 or when the BS selectively monitors the UL CI based on a pre - indication to be executed similar to Implementation Mode B1 and / or a specific UL transmission pre - configured for the BS, the specific UL transmission can include at least one of the UL transmissions listed below. This can be to prevent the cancellation of URLLC services through the UL CI and to prevent unnecessary UL CI transmissions when the UL CI cannot cancel URLLC services.

[0404] - PUSCH for low-priority services;

[0405] - PUCCH for low-priority services;

[0406] - Low-priority services for SRS transmission;

[0407] - PRACH other than for initial access purposes (e.g., PRACH for receiving UL grants).

[0408] The channel / transmission for low-priority services may refer to eMBB services or non-URLLC services. Alternatively, when the priority for each channel / transmission is indicated or configured by L1 signaling, higher-layer signaling, DCI format, CRC scrambling, RNTI, CORESET, and / or search space, the channel / transmission may refer to the channel / transmission indicated or configured with a specific level or lower priority (e.g., low priority when two priorities are used).

[0409] When it is difficult to distinguish the priority of each service or the priority for each channel / transmission is indicated or configured by L1 signaling and / or higher-layer signaling, the UE may assume that the corresponding channel / transmission is a channel / transmission with low priority. In other words, the UE may consider at least one of the listed transmissions to use Implementation A1 (e.g., to determine the validity of the MO) without distinguishing the service priority. According to this method, when the UL CI is sent statically or group-commons by the UE without being broadcast, the BS may consider the UL transmission scheduled for the corresponding UE to send the UL CI, and thus may advantageously consider not canceling URLLC services at the BS level as much as possible. This method can simplify the UE implementation.

[0410] <Implementation B3-1> When using Implementation B1 or when the UE selectively monitors the UL CI based on a pre-indication to be executed similar to Implementation B1 and / or a specific UL transmission pre-configured for the BS, if the specific UL transmission corresponding to the specific UL transmission corresponds to at least one of all or some of the cases listed below in some implementations, the corresponding transmission may be excluded from the specific UL transmission. In other words, when using Implementation B1, the corresponding UL transmission may not be considered. Therefore, when a specific transmission is canceled by the UL CI, the validity of the UL CI MO may no longer be determined based on the corresponding UL transmission, thus minimizing unnecessary UL CI monitoring. In particular, even if the UL CI indicates the cancellation of only a partial area of the resource, unnecessary UL CI monitoring may be minimized when the UE cancels all transmissions or transmissions after the indicated area.

[0411] When at least one part of the radio resource region of a specific transmission is cancelled (in other words, when indicated by UL CI);

[0412] - When the entire radio resource region of a specific transmission is cancelled;

[0413] - When the entire DMRS region of a specific transmission is cancelled;

[0414] - When the specific transmission is PUCCH or PRACH and part of the radio resource region is cancelled; and / or

[0415] - When part of the radio resource region of a specific transmission is cancelled and a phase discontinuity occurs in the corresponding radio resource (for example, when the radio resource of M or more symbols is cancelled and a phase discontinuity occurs. Here, the symbol length M can be a convention or predefined value, or can be determined by the UE's capabilities).

[0416] <Implementation B4> When the UL CI indicates a specific time and / or frequency resource region, and more specifically, when the ULCI indicates a part of a specific reference resource region, the BS can, in some implementations, indicate or configure the time granularity and / or frequency granularity of the UL CI. The value indicated by the UL CI or the bit field of the UL CI can correspond one-to-one or one-to-many to each symbol group and / or PRB subset of the reference resource region divided according to the granularity. In some implementations of the present disclosure, the following can be considered to determine the symbol group and PRB subset according to a given time / frequency granularity (see Implementations A4-1 and A4-2).

[0417] Therefore, when determining the reference resource region of each UL CI based on the UL CI MO, the same resource grid can be used in the corresponding UL CI and even the same time / frequency region can be indicated in different UL CI MOs. Therefore, when the BS intends to cancel the UL transmission in a specific resource region through the UL CI, redundant cancellation of a wide region can be prevented.

[0418] <Implementation B4-1> When the BS determines the symbol group according to a given time granularity indicated or configured for the UE, the system frame number SFN = 0 can be used as a reference point for the resource grid, and the reference resource region can be divided into symbol groups.

[0419] For example, when the given time granularity is P and the reference resource region is located at N start ref,time away from SFN = 0 and has a length of N size ref,time the reference resource region can include the following symbol groups.

[0420] - The first symbol group can start from SFN = 0 for N start ref,time starting.

[0421] - The length of the first symbol group can be P - (N start ref,time mod P).

[0422] - The length of the last symbol group can be (N start ref,time + N size ref,time ) mod P. When the corresponding value is 0 or less than or equal to 0, the length of the last symbol group can be P.

[0423] - The length of other symbol groups can be P.

[0424] The symbol groups can be continuously mapped to UL symbols and / or flexible symbols or can be mapped to consecutive symbols without distinguishing the transmission direction. When the symbol groups are mapped to consecutive symbols without distinguishing the transmission direction, if there is no at least one UL or flexible symbol in the corresponding symbol group, the corresponding symbol group can be excluded from the reference resource area.

[0425] N can be derived according to the starting symbol of the reference resource area by the following formula start ref,time : N start ref,time = (SFN * numberOfSlotsPerFrame * numberOfSymbolsPerSlot + slot number in the frame * numberOfSymbolsPerSlot + symbol number in the slot). Here, numberOfSlotsPerFrame and numberOfSymbolsPerSlot are the number of consecutive time slots per frame and the number of consecutive symbols per time slot respectively. "Slot number in the frame" can be the time slot index in the frame including the starting symbol of the reference resource area, and "symbol number in the slot" can be the starting symbol index in the time slot including the starting symbol of the reference resource area.

[0426] <Implementation B4-2> When the BS determines the PRB subset according to the frequency granularity indicated or determined for the UE, the common resource block 0 can be used as the reference point of the resource grid, and the reference resource area can be divided into PRB subsets.

[0427] For example, when the given frequency granularity is P and the reference resource area exists at N size ref,freq away from the common resource block 0 and has a length of N size ref,freqWhen it is, the reference resource region may include the following PRB subsets.

[0428] - The first PRB subset may start at N away from common resource block 0. start ref,freq Start.

[0429] - The length of the first PRB subset may be P - (N start ref,freq mod P).

[0430] - The length of the last PRB subset may be (N start ref,freq + N size ref,freq ) mod P. When the corresponding value is 0 or equal to or less than 0, the length of the last PRB subset may be P.

[0431] - The length of the other PRB subsets may be P.

[0432] When the reference resource region is determined by the active BWP, N start ref,freq may be determined by N start BWP based on the value N' start ref,freq where N start BWP is the start time of the active BWP from common resource block 0. For example, N start ref,freq = N start BWP + N' start ref,freq .

[0433] <Implementation Mode B5> When the UL CI indicates a specific time and / or frequency resource region, and more specifically, when the ULCI indicates a part of a specific reference resource region, the BS may, in some implementations, configure the interval of the UL CI MO configured for the UE to always be an integer multiple of the granularity of the region indicating the reference resource (especially the time reference resource) in which the transmission is cancelled. Therefore, when the reference resource region is determined based on the interval of the UL CI MO, the same time / frequency resource region may be indicated by different UL CIs. Therefore, when the BS intends to cancel the transmission in a specific resource region through the UL CI, redundant cancellation of a wide region can be prevented.

[0434] In some implementations, for example, when a UL CI indicates the region of the reference resource area where the transmission is cancelled in units of X symbols, the BS can configure the MO in which the UL CI will be sent at intervals that are integer multiples of X. Alternatively, when a UL CI indicates the region of the reference resource area where the transmission is cancelled in units of X symbols, the BS may not configure the MO in which the UL CI will be sent at intervals that are integer multiples of X.

[0435] <Implementation B6> When the BS sends a UL CI to the UE, if there are available DMRSs in the front part of the UL transmission after cancellation (i.e., the front part of the remaining resources not indicated by the UL CI among the resources of the UL transmission), and there is sufficient timing gap between the UL CI and the start of the cancelled UL transmission (i.e., the start of the UL resources before cancellation among the UL resources of the UL transmission cancelled by the UL CI), the BS may assume that the front part of the UL transmission after cancellation is sent.

[0436] Reusing the remaining resources to resume the UL transmission after a part of the UL transmission is cancelled, i.e., the "stop and resume" of the UL transmission, may not be supported. Therefore, when a UL cancellation is indicated once, the UE may discard the indication and UL transmissions on subsequent resources. It may be necessary to clarify the UE behavior for the front part of the UL transmission. Even if the UL transmission partially overlaps with the resources indicated by the UL CI, it may be considered to discard the entire UL transmission in the time slot. However, this may be inefficient when the resources reserved for the UL transmission of another UE (i.e., the resources on which the UL transmission of another UE is cancelled) span only one or two OFDM symbols. It may be beneficial to send the front part of the UL transmission when there are available DMRSs (not cancelled by the UL CI) in the front part of the UL transmission and there is sufficient timing gap between the UL CI and the start of the cancelled UL transmission (i.e., the start of the UL resources before cancellation by the UL CI).

[0437] For example, when the time domain / frequency domain is indicated to the UE through a UL CI, the UE may cancel (discard, puncture or rate match) the UL transmission in the time domain / frequency domain and subsequent resources, and the BS may assume this UE operation. When the front part of the UL transmission has available DMRS symbols, the BS may receive a part of the UL transmission. Therefore, at least in the case of PUSCH, when the BS receives the front part of the UL transmission and the front part of the UL transmission has available DMRS symbols, the BS may indicate CBG-level retransmission of the remaining part to receive the remaining part.

[0438] <Implementation B7> The minimum processing time for UL CI can be given by one of the values included in the minimum processing time capabilities of the PUSCH configured with the SCS of the DL BWP in which the UE receives the PDCCH carrying the UL CI (e.g., T stated in 3GPP TS38.214) proc,2 ) For each SCS configuration, the UE can report to the BS whether a specific processing time (type 1 processing time and / or type 2 processing time) is available, and the BS can configure one of the type 1 processing time and type 2 processing time to the UE. For example, the UE and the BS can use the PUSCH processing time available to the UE among the SCS values of the DL BWP in which the PDCCH is received, and can use one of the type 1 processing time and type 2 processing time when both the type 1 processing time and type 2 processing time are available. To enable different UEs to have the same timing gap, the minimum processing time for UL CI can be used as the timing gap between the end symbol of the PDCCH CORESET and the start of the reference time region.

[0439] When the UL CI signaling is group common, it may not be necessary to configure different offsets for different UEs. Assuming the SCS for deriving the minimum processing time for UL CI (e.g., the value of T) proc,2 In the case of, there is no transmission preparation, so it may be reasonable to only consider the SCS of the DL BWP carrying the UL CI. When the UE considers DL and UL parameter sets for PUSCH / PUCCH, different UEs with different UL BWPs having different parameter sets can have different timing gaps between the end symbol of the PDCCH CORESET and the start of the reference time region, resulting in redundant cancellation.

[0440] <Implementation B7-1> The minimum processing time for UL CI and the timing gap between the end symbol of the PDCCH CORESET and the start of the reference time region can be determined using the minimum value among the SCSs provided together by multiple UEs that receive the same UL CI.

[0441] UEs in a cell can identify information about the available SCSs in the cell through the frequencyInfoUL of the UplinkConfigCommonSIB IE received typically through the RRC signaling of the BS, i.e., the RRC parameters received through the FrequencyInfoUL-SIB IE (see 3GPP TS 38.331). Additionally, UEs that receive the same UL CI can receive the same PDCCH, so the SCS of the DL BWP in which the UL CI is received can be the same.

[0442] In some implementations of the present disclosure, to determine the size or length of the reference resource region in the time domain and / or frequency domain used in the UL CI, the minimum SCS among these SCSs can be selected. Specifically, the processing time of the ULCI can be assumed using the smaller value of the SCS configured by FrequencyInfoUL-SIBIE and the SCS of the PDCCH on which the UL CI is received. For example, for a serving cell, the UE can determine the first symbol of the reference UL resource for the UL CI as the first symbol after T proc,2 +d after the end of the reception of the PDCCH in which the UE detects the UL CI, where d can be provided according to delta_offset_d. The delta_offset_d can be provided to the UE by the RRC signaling of the BS. T proc,2 can correspond to the PUSCH processing capability 2, assuming d 2,1 =0, and u is the minimum SCS configuration among the SCS provided by FrequencyInfoUL-SIB and the SCS of the active DL BWP for monitoring the PDCCH for UL CI detection by the UE for the serving cell.

[0443] Alternatively, the BS can explicitly indicate one of the SCSs to be used in the assumption of the UL CI processing time through RRC parameters. Therefore, the SCS to be used can be directly configured, or it can be configured whether to use the minimum SCS among the SCSs included in FrequencyInfoUL-SIB or the SCS of the DL BWP in which the UL CI is received. In other words, the BS can directly / indirectly configure the SCS set for the UL CI for the UE, and the UE can select the minimum SCS among them.

[0444] Therefore, the UE and the BS can select the smallest possible SCS, so that the UE can ensure sufficient UL CI processing time, thereby reducing the implementation difficulty of the UE.

[0445] <Implementation B8> When the UL CI indicates a specific time and / or frequency resource region, and more specifically, when the ULCI indicates a part of a specific reference resource region, the length of the reference resource region, especially the length in the time domain, can be determined as the period or interval of the UL CI MO or an integer multiple of the period or interval. Therefore, one UL CI can use the resources of UL CIMO or more intervals as the reference resource region, so that the UL CI can indicate the entire resource region available to the UE.

[0446] When determining the UL CI MO through the search space configuration of the existing system, it may be difficult to specify the interval of the UL CI MO. The MO configured through the search space configuration included in the RRC configuration information is determined according to the monitoring pattern in a time slot and the period at the time slot level. Therefore, when multiple UL CI MOs are configured in a time slot, the intervals between UL CIs may not be the same. Therefore, in this case, in order to determine the interval or period of the UL CI MO, the following methods can be considered.

[0447] - The actually configured UL CI interval can be ignored, and the interval between the MOs of the UL CI can be determined as the search space period (for example, the value of monitoringSlotPeriodicityAndOffset in the SearchSpace IE). In order to effectively use this method, when the search space period is greater than 1, it can be assumed that only one UL CI MO is configured in the time slot. In other words, it can be assumed that two or more UL CI MOs are not configured in a time slot.

[0448] - The interval of the UL CI MO can be determined as the average value of the actually configured UL CI intervals. For example, when N UL CI MOs are configured in a time slot, N different intervals can be configured for the corresponding UL CI MOs, and in this case, the period / interval used to determine the reference resource area can be the average value of the intervals.

[0449] <Implementation Mode B9> When the UL CI indicates a specific time and / or frequency resource area, and more specifically, when the ULCI indicates a part of a specific reference resource area, the length of the reference resource area, especially the length in the time domain, can be different for each UL CI MO. Therefore, when different UL CI MOs are spaced at irregular intervals, the entire UL resource area can be effectively represented by the ULCI. In this case, in order to determine the UL CI reference resource area or the length of the reference resource area, at least one of the following methods can be considered.

[0450] - The length of the reference resource area of the UL CI transmitted in a specific UL CI MO can be determined as the interval from the corresponding ULCI MO to the next UL CI MO or an integer multiple of the corresponding interval. For example, the interval from the start or last symbol of the CORESET in which a specific ULCI MO is received to the start or last symbol of the CORESET in which the next UL CI MO is transmitted or an integer multiple of the corresponding interval can be determined as the reference resource area or the length of the reference resource area. In this case, the following method can be used to determine the following UL CI MO.

[0451] >> Option 1: The next UL CI MO can be determined as the UL CI MO that is closest to the corresponding UL CI MO (i.e., the first one after the corresponding UL CI MO in time) among the available UL CI MOs considering the TDD configuration sent by the BS (e.g., TDD-UL-DL-Configdedicated and TDD-UL-DL-Configcommon) and the slot format indication. Thus, each UL CI MO can represent the entire UL resource region considering the UL CI MO in which the actual reception of the UE occurs.

[0452] >> Option 2: The next UL CI MO can be determined as the UL CI MO that is closest to the corresponding UL CI MO (i.e., the first one after the corresponding UL CI MO in time) among the available UL CI MOs considering the TDD configuration sent by the BS (e.g., TDD-UL-DL-Configdedicated and TDD-UL-DL-Configcommon). Thus, the reference resource region can be determined semi-statically.

[0453] >> Option 3: The next UL CI MO can be determined as the UL CI MO that is closest to the corresponding UL CI MO (i.e., the first one after the corresponding UL CI MO in time) among the available UL CI MOs considering the cell-common TDD configuration sent by the BS (e.g., TDD-UL-DL-Configcommon). Thus, a group of UEs for monitoring the UL CI can have the same reference resource region or reference resource region length.

[0454] - The length of the reference resource region of the UL CI received in a specific UL CI MO can be determined as the search space period (e.g., the value of monitoringSlotPeriodicityAndOffset in the SearchSpace IE) or an integer N times the corresponding time length. In this case, the following method can be used to determine N.

[0455] >> Option 1: Considering the TDD configuration (e.g., TDD-UL-DL-Configdedicated and TDD-UL-DL-Configcommon) sent by the BS and the slot format indication, the number of unavailable UL CI MOs (e.g., overlapping with UL symbols) to which the next possible UL CI MO can be transmitted or the number of slots in which UL CI MOs are configured but no available UL CI MOs (e.g., in DL symbols) exist can be determined as N. Thus, considering the ULCI MO where the actual reception of the UE occurs, the UL CI MO can represent the entire resource region.

[0456] >> Option 2: Considering the TDD configuration (e.g., TDD-UL-DL-Configdedicated and TDD-UL-DL-Configcommon) sent by the BS, the number of unavailable UL CI MOs (e.g., overlapping with UL symbols) to which the next possible UL CI MO can be transmitted or the number of slots in which UL CI MOs are configured but no available UL CI MOs (e.g., in DL symbols) exist can be determined as N. Thus, the reference resource region can be determined semi-statically.

[0457] >> Option 3: Considering the cell-common TDD configuration (e.g., TDD-UL-DL-Configcommon) sent by the BS, the number of unavailable UL CI MOs (e.g., overlapping with UL symbols) to which the next possible UL CI MO for reception can be transmitted or the number of slots in which UL CI MOs are configured but no available UL CI MOs (e.g., in DL symbols) exist can be determined as N. Thus, a group of UEs for monitoring UL CI can have the same reference resource region or reference resource region length.

[0458] Figure 13 FIG. illustrates an example of a signaling flow between a UE and a BS according to some implementations of the present disclosure.

[0459] The UE may report UE capability information related to the processing time of a data channel (e.g., PUSCH) to the BS. The BS may provide configuration information related to PDCCH monitoring considering the UE capability to the UE and may send a DL channel. The UE may perform PDCCH monitoring based on the configuration information to receive / decoder the PDCCH.

[0460] As Figure 13As illustrated in the example, information can be exchanged between the UE and the BS. The BS can configure scheduling request (SR) resources for the UE2 and can configure, via RRC configuration, for the UE1 the monitoring object (MO) for UL CI (S1300a and S1300b). Then, when configuring or indicating UL transmissions (S1320) of the PUSCH, PUCCH, etc. for the UE1, the UE1 can expect UL CI reception (S1330) only in specific MOs that meet the conditions. When the BS receives a scheduling request from the UE2 (S1340), if there are not enough resources (S1350), the BS can determine cancellable UL resources among the UL resources pre-allocated to the UE1 taking into account the UL CI MO of the UE1 (S1360). The BS can send the UL CI to the UE1 to cancel the UL transmission in the cancellable resources (S1370a) and can schedule the UL transmission of the UE2 via a scheduling message such as a UL grant (S1370b). The UE1 can cancel all or some of the UL transmissions scheduled for the UE1 based on the UL CI (S1380a). The UE2 can perform the UL transmission based on the received UL grant (S1380b). In some implementations of the present disclosure, the UE1 can be an eNB UE, and the UE2 can be a URLLC UE.

[0461] According to an implementation of the present disclosure, the BS and the UE can determine a PDCCH MO for an appropriate UL CI and can expect to send and receive the UL CI only in an MO that meets specific conditions. According to some implementations of the present disclosure, the BS can minimize redundant ULCI transmissions to reduce power consumption and PDCCH overhead and can additionally increase service availability. According to some implementations of the present disclosure, the UE can minimize redundant UL CI monitoring to reduce power and ensure processing time for another operation. Additionally, UE implementations can be facilitated.

[0462] The implementations of the present disclosure can be applied individually or at least one implementation can be combined and applied.

[0463] According to some implementations of the present disclosure, a UE may perform operations related to UL transmission. The UE may include at least one transceiver, at least one processor, and at least one computer memory operably connected to the at least one processor and storing instructions that, when executed, cause the at least one processor to perform operations. The processing device for the UE may include at least one processor and at least one computer memory operably connected to the at least one processor and storing instructions that, when executed, cause the at least one processor to perform operations. The computer-readable storage medium may store at least one computer program including instructions that, when executed by the at least one processor, cause the at least one processor to perform operations. The operations may include: receiving a configuration related to a physical downlink control channel (PDCCH) monitoring occasion (MO) for UL CI reception; receiving scheduling information for uplink transmission (UL) transmission; and based on the configuration and the scheduling information, performing or skipping UL CI monitoring for the UL transmission in the PDCCH MO. Performing or skipping UL CI monitoring for the UL transmission in the PDCCH MO may include: performing UL CI monitoring for the UL transmission in the PDCCH MO based on the UL transmission overlapping at least in time with a reference resource region indicated by the UL CI to be received in the PDCCH MO. Performing or skipping UL CI monitoring for the UL transmission in the PDCCH MO may include: skipping UL CI monitoring for the UL transmission in the PDCCH MO based on the UL transmission not overlapping in time with the reference resource region.

[0464] In some implementations of the present disclosure, the operations may further include: detecting a UL CI for the UL transmission based on performing the UL CI monitoring; and canceling the UL transmission in the resource indicated by the UL CI among the resources for the UL transmission based on detecting the UL CI.

[0465] In some implementations of the present disclosure, the reference resource region may include Y symbols in the time domain, and the first symbol among the Y symbols is the first symbol after X symbols from the end of the PDCCH MO, where X is a predefined value and Y is determined based on the configuration.

[0466] The scheduling information may be received in the time domain before the reference resource region.

[0467] The BS may send scheduling information received before a reference resource region in the time domain. The BS may include at least one transceiver, at least one processor, and at least one computer memory operably connected to the at least one processor and storing instructions that, when executed, cause the at least one processor to perform operations. The processing device for the BS may include at least one processor and at least one computer memory operably connected to the at least one processor and storing instructions that, when executed, cause the at least one processor to perform operations. The computer-readable storage medium may store at least one computer program including instructions that, when executed by the at least one processor, cause the at least one processor to perform operations. The operations may include: sending a configuration related to a physical downlink control channel (PDCCH) monitoring occasion (MO) for UL CI transmission; sending scheduling information for uplink (UL) transmission to a user equipment; and based on the configuration and the scheduling information, performing or skipping the transmission of the UL CI for UL transmission in the PDCCH MO. Performing or skipping the transmission of the UL CI for UL transmission may include: performing the transmission of the UL CI for UL transmission in the PDCCH MO based on the UL transmission overlapping at least in time with the reference resource region indicated by the UL CI to be sent in the PDCCH MO. Performing or skipping the transmission of the UL CI for UL transmission may include: skipping the transmission of the UL CI for UL transmission in the PDCCH MO based on the UL transmission not overlapping in time with the reference resource region.

[0468] In some implementations of the present disclosure, the operations may include: sending the ULCI for UL transmission in the PDCCH MO; and based on sending the UL CI, canceling receiving the UL transmission from the UE in the resources indicated by the UL CI among the resources for the UL transmission.

[0469] In some implementations of the present disclosure, the reference resource region may include Y symbols in the time domain. The first symbol among the Y symbols may be the first symbol after X symbols from the end of the PDCCH MO, where X is a predefined value and Y is determined based on the configuration.

[0470] The scheduling information may be sent in the time domain before the reference resource region.

[0471] Examples of the present disclosure have been presented above so that any ordinary person skilled in the art can implement and practice the present disclosure. Although the present disclosure has been described with reference to the examples, those skilled in the art can point out various modifications and changes in the examples of the present disclosure. Therefore, the present disclosure is not intended to be limited to the examples set forth herein, but rather will be accorded the widest scope consistent with the principles and features disclosed herein.

[0472] Industrial applicability

[0473] Implementations of the present disclosure can be used in a BS, UE, or other devices in a wireless communication system.

Claims

1. A method, comprising: receiving, by a user equipment, configuration regarding an uplink cancellation indication (UL CI), the configuration including information related to a physical downlink control channel (PDCCH) monitoring occasion (MO) for reception of the UL CI and information related to a reference resource region to which the UL CI applies; receiving, by the user equipment, scheduling information for uplink (UL) transmission; performing, by the user equipment, UL CI monitoring for the UL transmission in the PDCCH MO based on the PDCCH MO being valid for the UL transmission; and canceling, by the user equipment, the UL transmission in the overlapping resources based on detecting the UL CI in the PDCCH MO and based on the UL transmission including resources overlapping with resources determined to be canceled based on the UL CI, wherein the reference resource region includes a plurality of symbol groups in the time domain and at least one physical resource block (PRB) subset in the frequency domain, wherein the UL CI includes information regarding the symbol group and the PRB subset among the plurality of symbol groups and the at least one PRB subset for which transmission is to be canceled, and wherein the PDCCH MO is determined to be valid for the UL transmission based at least on i) the reference resource region overlapping with the resources of the UL transmission, and ii) the UL transmission being a transmission with a low priority.

2. The method according to claim 1, wherein the first symbol of the reference resource region is the first symbol after a time gap X from the end of the PDCCH MO, where the time gap X is the minimum processing time of a physical uplink shared channel (PUSCH) configured with a subcarrier spacing (SCS) of a downlink bandwidth part for the user equipment to receive a PDCCH with the UL CI.

3. The method according to claim 2, wherein the time gap X is obtained from T_proc,2 + d, where d is provided by radio resource control (RRC) signaling, and T_proc,2 is the minimum processing time of PUSCH processing capability 2 for the minimum SCS configuration among the SCS configured in a system information block (SIB) and the SCS of the downlink bandwidth part for which the user equipment monitors the PDCCH for UL CI detection in the serving cell.

4. The method according to any one of claims 1 to 3, wherein in the time domain, the scheduling information is received before the reference resource region.

5. A user equipment, comprising: at least one transceiver; at least one processor; and at least one computer memory operably connected to the at least one processor and storing instructions that, when executed, cause the at least one processor to perform operations, the operations including: Receive the configuration of the uplink cancellation indication (UL CI), where the configuration includes information related to the physical downlink control channel (PDCCH) monitoring occasion (MO) for the reception of the UL CI and information related to the reference resource region to which the UL CI applies; Receive scheduling information for uplink transmission (UL) transmission; Based on the PDCCH MO being valid for the UL transmission, perform ULCI monitoring for the UL transmission in the PDCCH MO; and Based on detecting the UL CI in the PDCCH MO and based on the UL transmission including resources overlapping with the resources determined to be cancelled based on the UL CI, cancel the UL transmission in the overlapping resources, where the reference resource region includes a plurality of symbol groups in the time domain and at least one subset of physical resource blocks (PRBs) in the frequency domain, where the UL CI includes information about the symbol group and the PRB subset among the plurality of symbol groups and the at least one PRB subset for which the transmission is to be cancelled, and where the PDCCH MO is determined to be valid for the UL transmission based at least on i) the reference resource region overlapping with the resources of the UL transmission, and ii) the UL transmission being a transmission with a low priority.

6. The user equipment according to claim 5, wherein, The first symbol of the reference resource region is the first symbol after a time gap X from the end of the PDCCH MO, where the time gap X is the minimum processing time of the physical uplink shared channel (PUSCH) configured with the subcarrier spacing (SCS) of the downlink bandwidth part for the user equipment to receive the PDCCH with the UL CI.

7. The user equipment according to claim 6, wherein, The time gap X is obtained from T_proc,2 + d, where d is provided by radio resource control (RRC) signaling, and T_proc,2 is the minimum processing time of the PUSCH processing capacity 2 for the minimum SCS configuration among the SCS configured for the downlink bandwidth part where the user equipment monitors the PDCCH for UL CI detection in the system information block (SIB).

8. The user equipment according to any one of claims 5 to 7, wherein, In the time domain, the scheduling information is received before the reference resource region.

9. An apparatus, comprising: At least one processor; and At least one computer memory operably connected to the at least one processor and storing instructions that, when executed, cause the at least one processor to perform operations, the operations including: Receive the configuration of the uplink cancellation indication (UL CI), where the configuration includes information related to the physical downlink control channel (PDCCH) monitoring occasion (MO) for the reception of the UL CI and information related to the reference resource region to which the UL CI applies; Receive scheduling information for uplink (UL) transmission; Based on the PDCCH MO being valid for the UL transmission, perform ULCI monitoring for the UL transmission in the PDCCH MO; and Based on detecting the UL CI in the PDCCH MO and based on the UL transmission including resources overlapping with the resources determined to be cancelled based on the UL CI, cancel the UL transmission in the overlapping resources, wherein the reference resource region includes a plurality of symbol groups in the time domain and at least one subset of physical resource blocks (PRBs) in the frequency domain, wherein the UL CI includes information about the symbol group and the PRB subset among the plurality of symbol groups and the at least one PRB subset for which the transmission is to be cancelled, and wherein the PDCCH MO is determined to be valid for the UL transmission based on at least i) the reference resource region overlapping with the resources of the UL transmission, and ii) the UL transmission being a transmission with low priority.

10. A computer-readable storage medium storing at least one computer program, the at least one computer program including instructions that, when executed by at least one processor, cause the at least one processor to perform operations for a user equipment, the operations including: Receive a configuration regarding an uplink cancellation indication (UL CI), the configuration including information related to a physical downlink control channel (PDCCH) monitoring occasion (MO) for receiving the UL CI and information related to a reference resource region to which the UL CI applies; Receive scheduling information for uplink (UL) transmission; Based on the PDCCH MO being valid for the UL transmission, perform ULCI monitoring for the UL transmission in the PDCCH MO; and Based on detecting the UL CI in the PDCCH MO and based on the UL transmission including resources overlapping with the resources determined to be cancelled based on the UL CI, cancel the UL transmission in the overlapping resources, wherein the reference resource region includes a plurality of symbol groups in the time domain and at least one subset of physical resource blocks (PRBs) in the frequency domain, wherein the UL CI includes information about the symbol group and the PRB subset among the plurality of symbol groups and the at least one PRB subset for which the transmission is to be cancelled, and wherein the PDCCH MO is determined to be valid for the UL transmission based on at least i) the reference resource region overlapping with the resources of the UL transmission, and ii) the UL transmission being a transmission with low priority.

11. A method, including: Transmit, by a base station, a configuration regarding an uplink cancellation indication (UL CI), the configuration including information related to a physical downlink control channel (PDCCH) monitoring occasion (MO) for transmitting the UL CI and information related to a reference resource region to which the UL CI applies; Transmit, by the base station, scheduling information for uplink (UL) transmission to a user equipment; Based on the PDCCH MO being valid for the UL transmission, the base station performs transmission of the UL CI for the UL transmission in the PDCCH MO; and Based on the UL CI being sent in the PDCCH MO and based on the UL transmission including resources overlapping with the resources to be cancelled based on the UL CI, the base station cancels reception of the UL transmission in the overlapping resources, wherein the reference resource region includes a plurality of symbol groups in the time domain and at least one subset of physical resource blocks (PRBs) in the frequency domain, wherein the UL CI includes information about the symbol group and the PRB subset among the plurality of symbol groups and the at least one PRB subset for which transmission is to be cancelled, and wherein the PDCCH MO is determined to be valid for the UL transmission based on at least i) the reference resource region overlapping with the resources of the UL transmission, and ii) the UL transmission being a transmission with low priority.

12. The method according to claim 11, wherein, the first symbol of the reference resource region is the first symbol after a time gap X from the end of the PDCCH MO, where the time gap X is the minimum processing time of the physical uplink shared channel (PUSCH) for the subcarrier spacing (SCS) configuration of the downlink bandwidth part for the user equipment to receive the PDCCH with the UL CI.

13. The method according to claim 12, wherein, the time gap X is obtained from T_proc,2 + d, where d is provided by radio resource control (RRC) signaling, and T_proc,2 is the minimum processing time of the PUSCH processing capacity 2 for the minimum SCS configuration among the SCS configurations of the downlink bandwidth part for which the user equipment monitors the PDCCH for UL CI detection with the SCS provided in the system information block (SIB).

14. The method according to any one of claims 11 to 13, wherein, in the time domain, the scheduling information is sent before the reference resource region.

15. A base station, comprising: at least one transceiver; at least one processor; and at least one computer memory operably connected to the at least one processor and storing instructions that, when executed, cause the at least one processor to perform operations including: sending a configuration regarding an uplink cancellation indication (UL CI), the configuration including information related to a physical downlink control channel (PDCCH) monitoring occasion (MO) for transmission of the UL CI and information related to a reference resource region to which the UL CI applies; sending scheduling information for an uplink transmission (UL) to a user equipment; based on the PDCCH MO being valid for the UL transmission, based on the configuration and the scheduling information, performing transmission of the UL CI for the UL transmission in the PDCCH MO; and Based on transmitting the UL CI in the PDCCH MO and based on the UL transmission including resources overlapping with the resources to be cancelled based on the UL CI, reception of the UL transmission in the overlapping resources is cancelled. Wherein, the reference resource region includes a plurality of symbol groups in the time domain and at least one physical resource block (PRB) subset in the frequency domain. Wherein, the UL CI includes information about the symbol group and the PRB subset among the plurality of symbol groups and the at least one PRB subset for which the transmission is to be cancelled, and Wherein, the PDCCH MO is determined to be valid for the UL transmission at least based on i) the reference resource region overlapping with the resources of the UL transmission, and ii) the UL transmission being a transmission with a low priority.

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