WO2020204528A1 - Method, user equipment, device, and storage medium for performing uplink transmission, and method and base station for performing uplink reception - Google Patents

Abstract

According to an aspect of the present disclosure, a method for transmitting a signal by a user equipment in a wireless communication system comprises: receiving a first physical downlink shared channel (PDSCH) and a second PDSCH, wherein the second PDSCH is located later than the first PDSCH in a time domain; and transmitting a first hybrid automatic repeat and request acknowledgement (HARQ-ACK) response for the first PDSCH and a second HARQ-ACK response for the second PDSCH, wherein: a second uplink resource associated with the second HARQ-ACK resource is located earlier than a first uplink resource associated with the first HARQ-ACK response in the time domain; the first HARQ-ACK response includes only an NACK on the basis of the fact that the number of serving cells, in which an out-of-order HARQ-ACK situation occurs, is greater than a predetermined value; and the out-of-order HARQ-ACK situation is a situation in which an HARQ-ACK response for a PDSCH located earlier in the time domain is transmitted overlappingly with or later than an HARQ-ACK response for a PDSCH located later in the time domain.

Description

Method for performing uplink transmission, user equipment, device, storage medium, method for performing uplink reception, and base station

The present disclosure relates to a wireless communication system.

Various devices and technologies such as smart phones and tablet PCs (Personal Computers) that require high data transmission, such as machine-to-machine (M2M) communication, machine type communication (MTC), etc. have appeared and spread. have. Accordingly, the amount of data required to be processed in a cellular network is increasing very rapidly. In order to satisfy such rapidly increasing data processing requirements, carrier aggregation technology, cognitive radio technology, etc. to efficiently use more frequency bands, etc., increase the data capacity transmitted within a limited frequency. Multi-antenna technology, multi-base station cooperation technology, etc. are developing.

As more communication devices require larger communication capacity, there is a need for enhanced mobile broadband (eMBB) communication compared to legacy radio access technology (RAT). In addition, massive machine type communication (mMTC) for providing various services anytime, anywhere by connecting a plurality of devices and objects to each other is one of the major issues to be considered in next-generation communication.

In addition, a discussion on a communication system to be designed in consideration of a service/user equipment (UE) sensitive to reliability and latency is ongoing. The introduction of next generation wireless access technology is being discussed in consideration of eMBB communication, mMTC, ultra-reliable and low latency communication (URLLC), and the like.

With the introduction of new wireless communication technology, not only the number of UEs to which the base station has to provide services in a predetermined resource area increases, but also the amount of data and control information transmitted/received with the UEs that the base station provides service Is increasing. Since the amount of radio resources available for the base station to communicate with the UE(s) is finite, the base station transmits up/downlink data and/or up/downlink control information to/from the UE(s) using finite radio resources. A new scheme for efficient reception/transmission is required. In other words, as the density of the node increases and/or the density of the UE increases, there is a need for a method for efficiently using high density nodes or high density user devices for communication.

In addition, there is a need for a method to efficiently support various services having different requirements in a wireless communication system.

In addition, overcoming delay or latency is an important challenge for applications where performance is sensitive to delay/latency.

The technical problems to be achieved in the various examples of the present disclosure are not limited to the matters mentioned above, and other technical problems that are not mentioned are to those of ordinary skill in the art from various examples of the present disclosure to be described below. Can be considered by

Various examples of the present disclosure may provide a method of transmitting and receiving a signal in a wireless communication system and an apparatus supporting the same.

As an aspect of the present disclosure, in a method for a user equipment to transmit a signal in a wireless communication system, a first PDSCH (physical downlink shared channel) and a second PDSCH are received, wherein the second PDSCH is more than the first PDSCH. Located later on the time domain; And a first Hybrid Automatic Repeat and Request Acknowledgment (HARQ-ACK) response for the first PDSCH and a second HARQ-ACK response for the second PDSCH, and a second uplink associated with the second HARQ-ACK response. The link resource is located earlier in the time domain than the first uplink resource associated with the first HARQ-ACK response, and the first HARQ-ACK response is a serving cell in which an out-of-order HARQ-ACK situation occurs. Based on the fact that the number of them is greater than a predetermined value, only NACK is included, and in the out of sequence HARQ-ACK situation, the HARQ-ACK response for the PDSCH located earlier in the time domain is HARQ for the PDSCH located after the time domain. This is a signal transmission method, which is a situation that is transmitted overlaid with the -ACK response or transmitted later.

In another aspect of the present disclosure, an apparatus for a user equipment in a wireless communication system, comprising: at least one processor; And at least one memory (memory) operatively connected to the at least one or more processors to store at least one or more instructions for causing the at least one or more processors to perform operations, wherein the operations are: 1 receive a PDSCH (physical downlink shared channel) and a second PDSCH, wherein the second PDSCH is located after the first PDSCH in a time domain; And a first Hybrid Automatic Repeat and Request Acknowledgment (HARQ-ACK) response for the first PDSCH and a second HARQ-ACK response for the second PDSCH, and a second uplink associated with the second HARQ-ACK response. The link resource is located earlier in the time domain than the first uplink resource associated with the first HARQ-ACK response, and the first HARQ-ACK response is a serving cell in which an out-of-order HARQ-ACK situation occurs. Based on the fact that the number of them is greater than a predetermined value, only NACK is included, and in the out of sequence HARQ-ACK situation, the HARQ-ACK response for the PDSCH located earlier in the time domain is HARQ for the PDSCH located after the time domain. It is a device that is transmitted over or over with an ACK response.

In yet another aspect of the present disclosure, a user equipment for transmitting a signal in a wireless communication system, comprising: at least one transceiver; At least one processor; And at least one memory (memory) operatively connected to the at least one or more processors to store at least one or more instructions for causing the at least one or more processors to perform operations, wherein the operations are: 1 receive a PDSCH (physical downlink shared channel) and a second PDSCH, wherein the second PDSCH is located after the first PDSCH in a time domain; And a first Hybrid Automatic Repeat and Request Acknowledgment (HARQ-ACK) response for the first PDSCH and a second HARQ-ACK response for the second PDSCH, and a second uplink associated with the second HARQ-ACK response. The link resource is located earlier in the time domain than the first uplink resource associated with the first HARQ-ACK response, and the first HARQ-ACK response is a serving cell in which an out-of-order HARQ-ACK situation occurs. Based on the fact that the number of them is greater than a predetermined value, only NACK is included, and in the out of sequence HARQ-ACK situation, the HARQ-ACK response to the PDSCH located earlier in the time domain is HARQ for the PDSCH located after This is a user equipment, which is a situation that is transmitted over or over with an ACK response.

In yet another aspect of the disclosure, a computer-readable storage medium, wherein the computer-readable storage medium, when executed by at least one or more processors, causes the at least one or more processors to perform operations for a user device. Stores at least one computer program including the above instructions, the operations: receiving a first PDSCH (physical downlink shared channel) and a second PDSCH, wherein the second PDSCH is more than the first PDSCH Located later on the time domain; And a first Hybrid Automatic Repeat and Request Acknowledgment (HARQ-ACK) response for the first PDSCH and a second HARQ-ACK response for the second PDSCH, and a second uplink associated with the second HARQ-ACK response. The link resource is located earlier in the time domain than the first uplink resource associated with the first HARQ-ACK response, and the first HARQ-ACK response is a serving cell in which an out-of-order HARQ-ACK situation occurs. Based on the fact that the number of them is greater than a predetermined value, only NACK is included, and in the out of sequence HARQ-ACK situation, the HARQ-ACK response for the PDSCH located earlier in the time domain is HARQ for the PDSCH located after the time domain. -A computer-readable storage medium that is a situation that is transmitted overlaid with an ACK response or transmitted later.

In another aspect of the present disclosure, in a method for a base station to receive a signal in a wireless communication system, a first PDSCH (physical downlink shared channel) and a second PDSCH are transmitted, wherein the second PDSCH is the first PDSCH Located later on the time domain; And a first hybrid automatic repeat and request acknowledgment (HARQ-ACK) response for the first PDSCH and a second HARQ-ACK response for the second PDSCH, and a second uplink associated with the second HARQ-ACK response. The link resource is located earlier in the time domain than the first uplink resource associated with the first HARQ-ACK response, and the first HARQ-ACK response is a serving cell in which an out-of-order HARQ-ACK situation occurs. Based on the fact that the number of them is greater than a predetermined value, only NACK is included, and in the out of sequence HARQ-ACK situation, the HARQ-ACK response for the PDSCH located earlier in the time domain is HARQ for the PDSCH located after the time domain. This is a signal reception method, which is a situation that is received overlapping with an ACK response or received later.

In another aspect of the present disclosure, a base station for receiving a signal in a wireless communication system, comprising: at least one processor; And at least one memory (memory) operatively connected to the at least one or more processors to store at least one or more instructions for causing the at least one or more processors to perform operations, wherein the operations are: 1 PDSCH (physical downlink shared channel) and a second PDSCH are transmitted, wherein the second PDSCH is located after the first PDSCH in a time domain; And a first hybrid automatic repeat and request acknowledgment (HARQ-ACK) response for the first PDSCH and a second HARQ-ACK response for the second PDSCH, and a second uplink associated with the second HARQ-ACK response. The link resource is located earlier in the time domain than the first uplink resource associated with the first HARQ-ACK response, and the first HARQ-ACK response is a serving cell in which an out-of-order HARQ-ACK situation occurs. Based on the fact that the number of them is greater than a predetermined value, only NACK is included, and in the out of sequence HARQ-ACK situation, the HARQ-ACK response for the PDSCH located earlier in the time domain is HARQ for the PDSCH located after the time domain. It is a base station, which is a situation that is received overlapping with an ACK response or received later.

The predetermined value may be the maximum number of serving cells for which decoding of the PDSCH located earlier in the time domain is allowed.

Based on the fact that the number of serving cells in which the out-of-order HARQ-ACK situation occurs is greater than the predetermined value, serving cells as many as the number corresponding to the predetermined value among the serving cells in which the out-of-order HARQ-ACK situation occurs The HARQ-ACK response to the PDSCH first located in the time domain transmitted from the remaining serving cells except for the NACK may include only the NACK.

It may further include determining the number of serving cells corresponding to the predetermined value among the serving cells in which the out-of-order HARQ-ACK situation occurs.

The serving cells as many as the number corresponding to the predetermined value may be determined based on cell indexes of the serving cells in which the out-of-order HARQ-ACK condition has occurred.

It may further include transmitting information on the predetermined value.

The above problem solving methods are only some of the various examples of the present disclosure, and various examples reflecting the technical features of the present disclosure may be derived and understood based on the following detailed description by a person having ordinary knowledge in the art. have.

According to various examples of the present disclosure, a wireless communication signal may be efficiently transmitted/received. Accordingly, the overall throughput of the wireless communication system can be increased.

In addition, various services having different requirements can be efficiently supported in a wireless communication system.

Further, a delay/latency occurring during wireless communication between communication devices may be reduced.

The effects according to the present disclosure are not limited to the effects mentioned above, and other effects not mentioned will be clearly understood by those of ordinary skill in the art related to the present disclosure from the following detailed description. .

The accompanying drawings are provided to aid understanding of various examples of the present disclosure, and provide various examples of the present disclosure together with a detailed description. However, the technical features of various examples of the present disclosure are not limited to a specific drawing, and features disclosed in each drawing may be combined with each other to constitute a new example. Reference numerals in each drawing refer to structural elements.

1 shows an example of communication system 1 to which implementations of the present specification are applied.

2 is a block diagram illustrating examples of communication devices capable of performing a method according to the present specification.

3 illustrates another example of a wireless device capable of performing implementation(s) of the present specification.

4 shows an example of a frame structure usable in a 3GPP-based wireless communication system.

5 illustrates a resource grid of a slot.

6 illustrates slot structures that can be used in a 3GPP-based system.

7 shows an example of PDSCH time domain resource allocation by PDCCH and an example of PUSCH time domain resource allocation by PDCCH.

8 illustrates a HARQ-ACK transmission/reception process.

9 shows an example of multiplexing UCI to PUSCH.

10 shows an example of a process in which a UE having PUCCHs overlapping in a single slot handles collision between UL channels.

11 illustrates cases of UCI multiplexing according to FIG. 9.

12 illustrates a process in which a UE having PUCCH and PUSCH overlapping in a single slot handles collision between UL channels.

13 illustrates UCI multiplexing in consideration of a timeline condition.

14 illustrates transmission of a plurality of HARQ-ACK PUCCHs in a slot.

15 is a flowchart illustrating a non-sequential situation according to an example of the present disclosure.

16 is a flowchart illustrating a non-sequential situation according to another example of the present disclosure.

17 is a flowchart illustrating various examples related to transmission of uplink control information (UCI) according to the present disclosure.

18 is for explaining PUSCH power control in a non-sequential HARQ-ACK/PUSCH scheduling situation according to an example of the present disclosure.

19 is for explaining PUSCH power control in a non-sequential HARQ-ACK/PUSCH scheduling situation according to another example of the present disclosure.

FIG. 20 is for explaining PUSCH power control in a non-sequential HARQ-ACK/PUSCH scheduling situation according to another example of the present disclosure.

21 is for explaining PUSCH power control in a non-sequential HARQ-ACK/PUSCH scheduling situation according to another example of the present disclosure.

22 is a flowchart of a method for transmitting an uplink signal by a user equipment according to an example of the present disclosure.

23 is a flowchart of a method for receiving an uplink by a base station according to an example of the present disclosure.

Hereinafter, implementations according to the present specification will be described in detail with reference to the accompanying drawings. The detailed description to be disclosed below with the accompanying drawings is intended to describe an exemplary implementation of the present specification, and is not intended to represent the only implementation form in which the present specification may be practiced. The detailed description below includes specific details to provide a thorough understanding of the present specification. However, one of ordinary skill in the art appreciates that the present specification may be practiced without these specific details.

In some cases, in order to avoid obscuring the concept of the present specification, well-known structures and devices may be omitted or illustrated in a block diagram format centering on core functions of each structure and device. In addition, the same components will be described with the same reference numerals throughout the present specification.

The techniques, devices, and systems described below can be applied to various wireless multiple access systems. Examples of multiple access systems include a code division multiple access (CDMA) system, a frequency division multiple access (FDMA) system, a time division multiple access (TDMA) system, an orthogonal frequency division multiple access (OFDMA) system, and a single carrier frequency (SC-FDMA) system. division multiple access) system, MC-FDMA (multi carrier frequency division multiple access) system, and the like. CDMA may be implemented in a radio technology such as Universal Terrestrial Radio Access (UTRA) or CDMA2000. TDMA may be implemented in a radio technology such as Global System for Mobile communication (GSM), General Packet Radio Service (GPRS), Enhanced Data Rates for GSM Evolution (EDGE) (ie, GERAN). OFDMA may be implemented in wireless technologies such as Institute of Electrical and Electronics Engineers (IEEE) 802.11 (WiFi), IEEE 802.16 (WiMAX), IEEE802-20, and evolved-UTRA (E-UTRA). UTRA is a part of Universal Mobile Telecommunication System (UMTS), and 3rd Generation Partnership Project (3GPP) Long Term Evolution (LTE) is a part of E-UMTS using E-UTRA. 3GPP LTE adopts OFDMA in downlink (DL) and SC-FDMA in uplink (UL). LTE-advanced (LTE-A) is an evolved form of 3GPP LTE.

For convenience of description, the following description will be made on the assumption that the present specification is applied to a 3GPP-based communication system, for example, LTE and NR. However, the technical features of the present specification are not limited thereto. For example, although the following detailed description is described based on a mobile communication system corresponding to a 3GPP LTE/NR system, it can also be applied to any other mobile communication system, except for items specific to 3GPP LTE/NR. Do.

For terms and technologies that are not specifically described among terms and technologies used in the present specification, 3GPP LTE standard documents, for example, 3GPP TS 36.211, 3GPP TS 36.212, 3GPP TS 36.213, 3GPP TS 36.321, 3GPP TS 36.300 and 3GPP TS 36.331 and the like, 3GPP NR standard documents, for example, 3GPP TS 38.211, 3GPP TS 38.212, 3GPP TS 38.213, 3GPP TS 38.214, 3GPP TS 38.300, 3GPP TS 38.331, and the like may be referenced.

In the examples of this specification to be described later, the expression "assumes" by the device may mean that the subject transmitting the channel transmits the channel so as to conform to the "assumption". The subject receiving the channel may mean that the channel is received or decoded in a form conforming to the “assuming” under the premise that the channel is transmitted to conform to the “assuming”.

In the present specification, the UE may be fixed or mobile, and various devices that transmit and/or receive user data and/or various control information by communicating with a base station (BS) belong to this. The UE includes (Terminal Equipment), MS (Mobile Station), MT (Mobile Terminal), UT (User Terminal), SS (Subscribe Station), wireless device, PDA (Personal Digital Assistant), and wireless modem. ), handheld device, etc. In addition, in this specification, a BS generally refers to a fixed station that communicates with a UE and/or other BS, and exchanges various data and control information by communicating with the UE and other BSs. BS may be referred to as other terms such as ABS (Advanced Base Station), NB (Node-B), eNB (evolved-NodeB), BTS (Base Transceiver System), Access Point (Access Point), PS (Processing Server). In particular, the base station of UTRAN is called Node-B, the base station of E-UTRAN is called eNB, and the base station of new radio access technology network is called gNB. Hereinafter, for convenience of description, the base station is collectively referred to as a BS regardless of the type or version of the communication technology.

In this specification, a node refers to a fixed point at which radio signals can be transmitted/received by communicating with the UE. Various types of BSs can be used as nodes regardless of their name. For example, BS, NB, eNB, pico-cell eNB (PeNB), home eNB (HeNB), relay, repeater, and the like may be nodes. Also, the node may not have to be a BS. For example, it may be a radio remote head (RRH) or a radio remote unit (RRU). RRH, RRU, etc. generally have a power level lower than the power level of the BS. RRH or RRU or less, RRH/RRU) is generally connected to the BS by a dedicated line such as an optical cable, so RRH/RRU and BS are generally compared to cooperative communication by BSs connected by wireless lines. By cooperative communication can be performed smoothly. At least one antenna is installed in one node. The antenna may mean a physical antenna, or an antenna port, a virtual antenna, or an antenna group. Nodes are also called points.

In this specification, a cell refers to a certain geographic area in which one or more nodes provide communication services. Therefore, in this specification, communication with a specific cell may mean communication with a BS or a node that provides a communication service to the specific cell. In addition, the downlink/uplink signal of a specific cell means a downlink/uplink signal from/to a BS or a node that provides a communication service to the specific cell. A cell that provides uplink/downlink communication services to a UE is specifically referred to as a serving cell. In addition, the channel state/quality of a specific cell refers to a channel state/quality of a channel or communication link formed between a BS or a node and a UE providing a communication service to the specific cell. In the 3GPP-based communication system, the UE determines the downlink channel state from a specific node, CRS(s) transmitted on a CRS (Cell-specific Reference Signal) resource allocated to the specific node by the antenna port(s) of the specific node, and / Or it can be measured using CSI-RS(s) transmitted on a Channel State Information Reference Signal (CSI-RS) resource.

Meanwhile, the 3GPP-based communication system uses the concept of a cell to manage radio resources, and a cell associated with a radio resource is distinguished from a cell in a geographic area.

The “cell” in the geographic area may be understood as coverage in which a node can provide a service using a carrier, and the “cell” of a radio resource is a bandwidth (a frequency range configured by the carrier). bandwidth, BW). Since downlink coverage, which is a range in which a node can transmit a valid signal, and uplink coverage, which is a range in which a valid signal can be received from a UE, is dependent on the carrier that carries the signal, the node's coverage is used by the node. It is also associated with the coverage of the "cell" of the radio resource to be used. Therefore, the term "cell" can sometimes be used to mean coverage of a service by a node, sometimes a radio resource, and sometimes a range within which a signal using the radio resource can reach a valid strength.

Meanwhile, the 3GPP communication standard uses the concept of a cell to manage radio resources. The term "cell" associated with radio resources is defined as a combination of downlink resources (DL resources) and uplink resources (UL resources), that is, a combination of a DL component carrier (CC) and a UL CC. . The cell may be configured with a DL resource alone or a combination of a DL resource and a UL resource. When carrier aggregation is supported, the linkage between the carrier frequency of the DL resource (or, DL CC) and the carrier frequency of the UL resource (or UL CC) is indicated by system information Can be. For example, a combination of a DL resource and a UL resource may be indicated by a system information block type 2 (SIB2) linkage. Here, the carrier frequency may be the same as or different from the center frequency of each cell or CC. When carrier aggregation (CA) is configured, the UE has only one radio resource control (RRC) connection with the network. One serving cell provides non-access stratum (NAS) mobility information at RRC connection establishment/re-establishment/handover, and one serving cell Provides a security input when re-establishing an RRC connection/handover. Such cells are referred to as primary cells (Pcell). The Pcell is a cell operating on a primary frequency at which the UE performs an initial connection establishment procedure or initiates a connection re-establishment procedure. Depending on the UE capability, secondary cells (Scells) may be configured to form a set of serving cells together with the Pcell. Scell is a cell that can be set after RRC (Radio Resource Control) connection establishment is made, and provides additional radio resources in addition to the resources of a special cell (SpCell). In downlink, a carrier corresponding to a Pcell is called a downlink primary CC (DL PCC), and a carrier corresponding to a Pcell in uplink is called a UL primary CC (DL PCC). A carrier corresponding to the Scell in downlink is referred to as a DL secondary CC (DL SCC), and a carrier corresponding to the Scell in uplink is referred to as a UL secondary CC (UL SCC).

In the case of dual connectivity (DC) operation, the term SpCell refers to a Pcell of a master cell group (MCG) or a Pcell of a secondary cell group (SCG). SpCell supports PUCCH transmission and contention-based random access, and is always activated. The MCG is a group of serving cells associated with a master node (eg, BS) and consists of SpCell (Pcell) and optionally one or more Scells. For a UE configured as DC, the SCG is a subset of serving cells associated with the secondary node, and consists of a PSCell and zero or more Scells. In the case of a UE in the RRC_CONNECTED state that is not set to CA or DC, there is only one serving cell composed of only Pcell. In the case of a UE in the RRC_CONNECTED state set to CA or DC, the term serving cells refers to a set of cells consisting of SpCell(s) and all Scell(s). In DC, two MAC entities, one medium access control (MAC) entity for MCG and one MAC entity for SCG, are configured in the UE.

In a UE in which CA is configured and DC is not configured, a Pcell PUCCH group consisting of a Pcell and zero or more Scells and an Scell PUCCH group consisting of only Scell(s) may be configured. In the case of an Scell, an Scell (hereinafter referred to as a PUCCH cell) through which a PUCCH associated with a corresponding cell is transmitted may be configured. The Scell indicated by the PUCCH Scell belongs to the Scell PUCCH group, and the PUCCH transmission of the related UCI is performed on the PUCCH Scell, and the Scell whose PUCCH Scell is not indicated or the cell indicated as a PUCCH transmission cell is a Pcell belongs to the Pcell PUCCH group, and the PUCCH transmission of related UCI is performed on the Pcell.

In a wireless communication system, a UE receives information from a BS through a downlink (DL), and the UE transmits information to the BS through an uplink (UL). The information transmitted and/or received by the BS and the UE includes data and various control information, and various physical channels exist according to the type/use of the information they transmit and/or receive.

3GPP-based communication standards include downlink physical channels corresponding to resource elements carrying information originating from higher layers, and downlink physical channels corresponding to resource elements used by the physical layer but not carrying information originating from higher layers. Link physical signals are defined. For example, a physical downlink shared channel (PDSCH), a physical broadcast channel (PBCH), a physical downlink control channel (PDCCH), etc. are the downlink physical channels. It is defined, and a reference signal and a synchronization signal are defined as downlink physical signals. A reference signal (RS), also referred to as a pilot, refers to a signal of a predefined special waveform that the BS and the UE know each other. For example, a demodulation reference signal (DMRS), channel state information RS (channel state information RS, CSI-RS), etc. are defined as a downlink reference signal. 3GPP-based communication standards include uplink physical channels corresponding to resource elements carrying information originating from an upper layer, and uplink physical channels corresponding to resource elements used by the physical layer but not carrying information originating from an upper layer. Link physical signals are defined. For example, a physical uplink shared channel (PUSCH), a physical uplink control channel (PUCCH), and a physical random access channel (PRACH) are used as uplink physical channels. It is defined, and a demodulation reference signal (DMRS) for an uplink control/data signal, a sounding reference signal (SRS) used for uplink channel measurement, and the like are defined.

In this specification, PDCCH (Physical Downlink Control CHannel) refers to a set of time-frequency resources (eg, resource elements) carrying Downlink Control Information (DCI), and PDSCH (Physical Downlink Shared CHannel) refers to downlink data. It means a set of time-frequency resources to carry. In addition, PUCCH (Physical Uplink Control CHannel), PUSCH (Physical Uplink Shared CHannel), PRACH (Physical Random Access CHannel) are each (respectively) UCI (Uplink Control Information), uplink data, time-frequency carrying a random access signal It means a collection of resources. Hereinafter, the expression that the user equipment transmits/receives PUCCH/PUSCH/PRACH is used in the same sense as transmitting/receiving uplink control information/uplink data/random access signals on or through PUSCH/PUCCH/PRACH, respectively. do. In addition, the expression that the BS transmits/receives PBCH/PDCCH/PDSCH is used in the same meaning as transmitting broadcast information/downlink data/downlink control information on or through PBCH/PDCCH/PDSCH, respectively.

As more communication devices require a larger communication capacity, there is a need for improved mobile broadband communication compared to the existing radio access technology (RAT). In addition, massive MTC, which provides various services anytime, anywhere by connecting multiple devices and objects, is one of the major issues to be considered in next-generation communication. In addition, a communication system design considering a service/UE sensitive to reliability and latency is being discussed. Introduction of the next-generation RAT in consideration of such advanced mobile broadband communication, massive MTC, and URLLC (Ultra-Reliable and Low Latency Communication) is being discussed. Currently, 3GPP is conducting a study on the next-generation mobile communication system after EPC. In this specification, for convenience, the technology is referred to as a new RAT (NR) or 5G RAT, and a system that uses or supports NR is referred to as an NR system.

1 shows an example of communication system 1 to which implementations of the present specification are applied. Referring to Fig. 1, a communication system 1 applied to the present specification includes a wireless device, a BS, and a network. Here, the wireless device refers to a device that performs communication using wireless access technology (eg, 5G NR (New RAT), LTE (eg, E-UTRA)), and may be referred to as a communication/wireless/5G device. . Although not limited thereto, wireless devices include robots 100a, vehicles 100b-1 and 100b-2, eXtended Reality (XR) devices 100c, hand-held devices 100d, and home appliances 100e. ), an Internet of Thing (IoT) device 100f, and an AI device/server 400. For example, the vehicle may include a vehicle equipped with a wireless communication function, an autonomous vehicle, and a vehicle capable of performing inter-vehicle communication. Here, the vehicle may include an Unmanned Aerial Vehicle (UAV) (eg, a drone). XR devices include AR (Augmented Reality) / VR (Virtual Reality) / MR (Mixed Reality) devices, including HMD (Head-Mounted Device), HUD (Head-Up Display), TV, smartphone, It can be implemented in the form of a computer, wearable device, home appliance, digital signage, vehicle, robot, and the like. Portable devices may include smart phones, smart pads, wearable devices (eg, smart watches, smart glasses), computers (eg, notebook computers, etc.). Home appliances may include TVs, refrigerators, and washing machines. IoT devices may include sensors, smart meters, and the like. For example, the BS and the network may be implemented as a wireless device, and a specific wireless device 200a may operate as a BS/network node to another wireless device.

The wireless devices 100a to 100f may be connected to the network 300 through the BS 200. AI (Artificial Intelligence) technology may be applied to the wireless devices 100a to 100f, and the wireless devices 100a to 100f may be connected to the AI server 400 through the network 300. The network 300 may be configured using a 3G network, a 4G (eg, LTE) network, or a 5G (eg, NR) network. The wireless devices 100a to 100f may communicate with each other through the BS 200/network 300, but may perform direct communication (e.g. sidelink communication) without passing through the BS/network. For example, the vehicles 100b-1 and 100b-2 may perform direct communication (e.g. V2V (Vehicle to Vehicle)/V2X (Vehicle to Everything) communication). In addition, the IoT device (eg, sensor) may directly communicate with other IoT devices (eg, sensors) or other wireless devices 100a to 100f.

Wireless communication/ connections 150a and 150b may be achieved between the wireless devices 100a to 100f/BS 200 to the BS 200/wireless devices 100a to 100f. Here, wireless communication/connection may be performed through various wireless access technologies (eg, 5G NR) for uplink/downlink communication 150a and sidelink communication 150b (or D2D communication). Through wireless communication/ connection 150a and 150b, the wireless device and the BS/wireless device may transmit/receive wireless signals to each other. To this end, based on the various proposals of this specification, various configuration information setting procedures for transmission/reception of radio signals, various signal processing procedures (e.g., channel encoding/decoding, modulation/demodulation, resources) Mapping/demapping, etc.), resource allocation process, etc. may be performed.

2 is a block diagram illustrating examples of communication devices capable of performing a method according to the present specification. Referring to FIG. 2, the first wireless device 100 and the second wireless device 200 may transmit and/or receive wireless signals through various wireless access technologies (eg, LTE, NR). Here, {the first wireless device 100, the second wireless device 200} is the {wireless device 100x, BS 200} and/or {wireless device 100x, wireless device 100x) of FIG. 1 } Can be matched.

The first wireless device 100 includes one or more processors 102 and one or more memories 104, and may further include one or more transceivers 106 and/or one or more antennas 108. The processor 102 controls the memory 104 and/or the transceiver 106 and may be configured to implement the functions, procedures, and/or methods described/suggested above. For example, the processor 102 may process information in the memory 104 to generate first information/signal, and then transmit a radio signal including the first information/signal through the transceiver 106. In addition, the processor 102 may store information obtained from signal processing of the second information/signal in the memory 104 after receiving a radio signal including the second information/signal through the transceiver 106. The memory 104 may be connected to the processor 102 and may store various information related to the operation of the processor 102. For example, the memory 104 may store software code including instructions for performing some or all of the processes controlled by the processor 102, or performing the previously described/suggested procedures and/or methods. . Here, the processor 102 and the memory 104 may be part of a communication modem/circuit/chip designed to implement wireless communication technology (eg, LTE, NR). The transceiver 106 may be connected to the processor 102 and may transmit and/or receive radio signals through one or more antennas 108. The transceiver 106 may comprise a transmitter and/or a receiver. The transceiver 106 may be mixed with an RF (Radio Frequency) unit. In this specification, a wireless device may mean a communication modem/circuit/chip.

The second wireless device 200 includes one or more processors 202 and one or more memories 204, and may further include one or more transceivers 206 and/or one or more antennas 208. The processor 202 controls the memory 204 and/or the transceiver 206 and may be configured to implement the functions, procedures, and/or methods described/suggested above. For example, the processor 202 may process information in the memory 204 to generate third information/signal, and then transmit a wireless signal including the third information/signal through the transceiver 206. In addition, the processor 202 may store information obtained from signal processing of the fourth information/signal in the memory 204 after receiving a radio signal including the fourth information/signal through the transceiver 206. The memory 204 may be connected to the processor 202 and may store various information related to the operation of the processor 202. For example, the memory 204 may store software code including instructions for performing some or all of the processes controlled by the processor 202, or performing the procedures and/or methods described/suggested above. . Here, the processor 202 and the memory 204 may be part of a communication modem/circuit/chip designed to implement wireless communication technology (eg, LTE, NR). The transceiver 206 may be connected to the processor 202 and may transmit and/or receive radio signals through one or more antennas 208. The transceiver 206 may include a transmitter and/or a receiver. The transceiver 206 may be mixed with an RF unit. In this specification, a wireless device may mean a communication modem/circuit/chip.

Hereinafter, the hardware elements of the wireless devices 100 and 200 will be described in more detail. Although not limited thereto, one or more protocol layers may be implemented by one or more processors 102, 202. For example, the one or more processors 102, 202 may include one or more layers (e.g., a physical (PHY) layer, a medium access control (MAC) layer, a radio link control (RLC) layer). , A packet data convergence protocol (PDCP) layer, a radio resource control (RRC) layer, and a functional layer such as a service data adaption protocol (SDAP) may be implemented. One or more processors (102, 202) are one or more protocol data unit (protocol data unit (PDU)) and / or one or more service data unit (service data unit, SDU) according to the functions, procedures, proposals and / or methods disclosed in this document. ) Can be created. One or more processors 102 and 202 may generate messages, control information, data, or information according to functions, procedures, suggestions and/or methods disclosed herein. At least one processor (102, 202) is PDU, SDU, message, control information, data or signals containing information (e.g., baseband signals) in accordance with the functions, procedures, proposals and/or methods disclosed herein. Can be provided to one or more transceivers 106 and 206. One or more processors (102, 202) may receive signals (e.g., baseband signals) from one or more transceivers (106, 206), and PDU, SDU according to the functions, procedures, proposals and/or methods disclosed herein. , Messages, control information, data or information can be obtained.

One or more of the processors 102 and 202 may be referred to as a controller, microcontroller, microprocessor, or microcomputer. One or more of the processors 102 and 202 may be implemented by hardware, firmware, software, or a combination thereof. For example, one or more Application Specific Integrated Circuits (ASICs), one or more Digital Signal Processors (DSPs), one or more Digital Signal Processing Devices (DSPDs), one or more Programmable Logic Devices (PLDs), or one or more Field Programmable Gate Arrays (FPGAs) May be included in one or more processors 102 and 202. The functions, procedures, suggestions and/or methods disclosed in this document may be implemented using firmware or software, and firmware or software may be implemented to include modules, procedures, functions, and the like. Firmware or software configured to perform the functions, procedures, proposals and/or methods disclosed herein are included in one or more processors 102, 202, or stored in one or more memories 104, 204, and 202). The functions, procedures, proposals and or methods disclosed in this document may be implemented using firmware or software in the form of codes, instructions and/or a set of instructions.

One or more memories 104 and 204 may be connected to one or more processors 102 and 202 and may store various types of data, signals, messages, information, programs, codes, instructions and/or instructions. One or more memories 104 and 204 may be composed of ROM, RAM, EPROM, flash memory, hard drive, register, cache memory, computer readable storage medium, and/or combinations thereof. One or more memories 104 and 204 may be located inside and/or outside of one or more processors 102 and 202. In addition, one or more memories 104, 204 may be connected to one or more processors 102, 202 through various technologies such as wired or wireless connection.

The one or more transceivers 106 and 206 may transmit user data, control information, radio signals/channels, and the like mentioned in the methods and/or operation flow charts of this document to one or more other devices. The one or more transceivers 106 and 206 may receive user data, control information, radio signals/channels, and the like described in the functions, procedures, proposals, methods and/or operational flow charts disclosed herein from one or more other devices. For example, one or more transceivers 106, 206 may be coupled with one or more processors 102, 202, and may transmit and/or receive wireless signals. For example, one or more processors 102, 202 may control one or more transceivers 106, 206 to transmit user data, control information, or radio signals to one or more other devices. In addition, one or more processors 102, 202 may control one or more transceivers 106, 206 to receive user data, control information, or radio signals from one or more other devices. In addition, one or more transceivers (106, 206) may be connected to one or more antennas (108, 208), one or more transceivers (106, 206) through one or more antennas (108, 208) functions and procedures disclosed in this document. It may be configured to transmit and/or receive user data, control information, radio signals/channels, etc. mentioned in the proposal, method and/or operation flow chart. In this document, one or more antennas may be a plurality of physical antennas or a plurality of logical antennas (eg, antenna ports). One or more transceivers (106, 206) in order to process the received user data, control information, radio signal / channel, etc. using one or more processors (102, 202), the received radio signal / channel, etc. in the RF band signal. It can be converted into a baseband signal. One or more transceivers 106 and 206 may convert user data, control information, radio signals/channels, etc. processed using one or more processors 102 and 202 from a baseband signal to an RF band signal. To this end, one or more of the transceivers 106 and 206 may include (analog) oscillators and/or filters.

3 illustrates another example of a wireless device capable of performing implementation(s) of the present specification. Referring to FIG. 3, the wireless devices 100 and 200 correspond to the wireless devices 100 and 200 of FIG. 2, and various elements, components, units/units, and/or modules It can be composed of (module). For example, the wireless devices 100 and 200 may include a communication unit 110, a control unit 120, a memory unit 130, and an additional element 140. The communication unit may include a communication circuit 112 and a transceiver(s) 114. For example, the communication circuit 112 may include one or more processors 102 and 202 and/or one or more memories 104 and 204 of FIG. 2. For example, the transceiver(s) 114 may include one or more transceivers 106, 206 and/or one or more antennas 108, 208 of FIG. 2. The control unit 120 is electrically connected to the communication unit 110, the memory unit 130, and the additional element 140 and controls all operations of the wireless device. For example, the controller 120 may control the electrical/mechanical operation of the wireless device based on the program/code/command/information stored in the memory unit 130. In addition, the control unit 120 transmits the information stored in the memory unit 130 to an external (eg, other communication device) through the communication unit 110 through a wireless/wired interface, or through the communication unit 110 to the outside (eg, Information received through a wireless/wired interface from another communication device) may be stored in the memory unit 130.

The additional element 140 may be variously configured according to the type of wireless device. For example, the additional element 140 may include at least one of a power unit/battery, an I/O unit, a driving unit, and a computing unit. Although not limited to this, wireless devices include robots (Fig. 1, 100a), vehicles (Fig. 1, 100b-1, 100b-2), XR equipment (Fig. 1, 100c), portable equipment (Fig. 1, 100d), and home appliances. (Fig. 1, 100e), IoT device (Fig. 1, 100f), digital broadcasting UE, hologram device, public safety device, MTC device, medical device, fintech device (or financial device), security device, climate/environment device, It may be implemented in the form of an AI server/device (FIGS. 1, 400), BS (FIGS. 1, 200), and network nodes. The wireless device can be used in a mobile or fixed location depending on the use-example/service.

In FIG. 3, various elements, components, units/units, and/or modules in the wireless devices 100 and 200 may be entirely interconnected through a wired interface, or at least some may be wirelessly connected through the communication unit 110. For example, in the wireless devices 100 and 200, the control unit 120 and the communication unit 110 are connected by wire, and the control unit 120 and the first unit (eg, 130, 140) are connected through the communication unit 110. Can be connected wirelessly. In addition, each element, component, unit/unit, and/or module in the wireless device 100 and 200 may further include one or more elements. For example, the controller 120 may be configured with one or more processor sets. For example, the control unit 120 may be composed of a set of a communication control processor, an application processor, an electronic control unit (ECU), a graphic processing processor, and a memory control processor. As another example, the memory unit 130 includes random access memory (RAM), dynamic RAM (DRAM), read only memory (ROM), flash memory, volatile memory, and non-volatile memory. volatile memory) and/or a combination thereof.

In the present specification, at least one memory (eg, 104 or 204) may store instructions or programs, and the instructions or programs are at least operably connected to the at least one memory when executed. It may cause one processor to perform operations according to some embodiments or implementations of the present specification.

In the present specification, a computer-readable storage medium may store at least one instruction or computer program, and the at least one instruction or computer program is executed by at least one processor. It may cause one processor to perform operations according to some embodiments or implementations of the present specification.

In the present specification, a processing device or apparatus may include at least one processor and at least one computer memory connectable to the at least one processor. The at least one computer memory may store instructions or programs, and when executed, the instructions or programs cause at least one processor operably connected to the at least one memory to It may be possible to perform operations according to embodiments or implementations.

The communication device of the present specification includes at least one processor; And at least one storing instructions that are operably connectable to the at least one processor and, when executed, cause the at least one processor to perform operations according to the example(s) of the present specification to be described later. Contains one computer memory.

4 shows an example of a frame structure usable in a 3GPP-based wireless communication system.

The structure of the frame of FIG. 4 is only an example, and the number of subframes, the number of slots, and the number of symbols in the frame may be variously changed. In the NR system, OFDM numerology (eg, subcarrier spacing, SCS) may be set differently between a plurality of cells aggregated to one UE. Accordingly, the same number of symbols may be set differently. The (absolute time) duration of a time resource (eg, a subframe, a slot, or a transmission time interval (TTI)) consisting of may be set differently between aggregated cells, where the symbol is OFDM Symbol (or, cyclic prefix-orthogonal frequency division multiplexing (CP-OFDM) symbol), SC-FDMA symbol (or, discrete Fourier transform-spread-OFDM (discrete Fourier transform-spread-OFDM, DFT-s-OFDM) symbol) In this specification, a symbol, an OFDM-based symbol, an OFDM symbol, a CP-OFDM symbol, and a DFT-s-OFDM symbol may be replaced with each other.

4, in the NR system, uplink and downlink transmissions are organized into frames. Each frame has Tf = (Δfmax*Nf/100)*Tc = 10 ms duration, and is divided into two half-frames, each of which is 5 ms. Here, the basic time unit for NR is Tc = 1/(Δfmax*Nf), Δfmax = 480*103 Hz, and Nf=4096. For reference, the basic time unit for LTE is Ts = 1/(△fref*Nf,ref), △fref = 15*103 Hz, and Nf,ref=2048. Tc and Tf have a relationship of constant κ = Tc/Tf = 64. Each half-frame consists of five subframes, and the period Tsf of a single subframe is 1 ms. Subframes are further divided into slots, and the number of slots in the subframe depends on the subcarrier spacing. Each slot consists of 14 or 12 OFDM symbols based on a cyclic prefix. In a normal cyclic prefix (CP), each slot is composed of 14 OFDM symbols, and in the case of an extended CP, each slot is composed of 12 OFDM symbols. The numerology depends on the exponentially scalable subcarrier spacing Δf = 2u*15 kHz. The following table shows the number of OFDM symbols per slot (Nslotsymb), the number of slots per frame (Nframe, uslot), and the number of slots per subframe (Nsubframe, uslot) according to the subcarrier spacing △f = 2u*15 kHz for the regular CP. Is shown.

u	N slot symb	N frame,u slot	N subframe,u slot
0	14	10	One
One	14	20	2
2	14	40	4
3	14	80	8
4	14	160	16

The following table shows the number of OFDM symbols per slot, the number of slots per frame, and the number of slots per subframe according to the subcarrier spacing Δf = 2u*15 kHz for the extended CP.

u	N slot symb	N frame,u slot	N subframe,u slot
2	12	40	4

5 illustrates a resource grid of a slot. A slot contains a plurality of (eg, 14 or 12) symbols in the time domain. For each neuron (e.g., subcarrier spacing) and carrier, a common resource block (CRB) indicated by higher layer signaling (e.g., radio resource control (RRC) signaling) Nstart, ugrid Starting at, a resource grid of Nsize,ugrid,x*NRBsc subcarriers and Nsubframe,usymb OFDM symbols is defined. Here, Nsize,ugrid,x is the number of resource blocks (RBs) in the resource grid, and the subscript x is DL for downlink and UL for uplink. NRBsc is the number of subcarriers per RB, and NRBsc is usually 12 in a 3GPP-based wireless communication system. There is one resource grid for a given antenna port p, subcarrier spacing configuration u, and transmission direction (DL or UL). The carrier bandwidth Nsize,ugrid for the subcarrier spacing setting u is given to the UE by a higher layer parameter (eg, RRC parameter) from the network. Each element in the resource grid for the antenna port p and subcarrier spacing u is referred to as a resource element (RE), and one complex symbol may be mapped to each resource element. Each resource element in the resource grid is uniquely identified by an index k in the frequency domain and an index l indicating a symbol position relative to a reference point in the time domain. In the NR system, the RB is defined by 12 consecutive subcarriers in the frequency domain. In the NR system, RBs may be classified into common resource blocks (CRBs) and physical resource blocks (PRBs). CRBs are numbered from 0 upwards in the frequency domain for the subcarrier spacing setting u. The center of subcarrier 0 of CRB 0 for subcarrier spacing setting u coincides with'point A'which is a common reference point for resource block grids. PRBs are defined within a bandwidth part (BWP) and are numbered from 0 to NsizeBWP,i-1, where i is the number of the bandwidth part. The relationship between the common resource block nCRB and the physical resource block nPRB in the bandwidth part i is as follows: nPRB = nCRB + NsizeBWP,i, where NsizeBWP,i is a common resource block in which the bandwidth part starts relative to CRB 0. The BWP includes a plurality of consecutive RBs in the frequency domain. The carrier may contain up to N (eg, 5) BWPs. The UE may be configured to have more than one BWP on a given component carrier. Data communication is performed through an activated BWP, and only a predetermined number (eg, one) of BWPs set to the UE may be activated on the corresponding carrier.

6 illustrates slot structures that can be used in a 3GPP-based system. In all 3GPP based systems, e.g., NR systems, each slot is a self-contained structure that may include i) a DL control channel, ii) DL or UL data, and/or iii) a UL control channel. Can have For example, the first N symbols in the slot may be used to transmit the DL control channel (hereinafter, the DL control region), and the last M symbols in the slot may be used to transmit the UL control channel (hereinafter, the UL control region ). N and M are each non-negative integer. A resource region (hereinafter, a data region) between the DL control region and the UL control region may be used for DL data transmission or UL data transmission. The symbols of a single slot may be divided into group(s) of consecutive symbols that can be used as DL, UL, or flexible. Hereinafter, information indicating how each of the symbols of the slot is used is referred to as a slot format. For example, the slot format may define which symbols in the slot are used for UL and which symbols are used for DL.

When a serving cell is to be operated in a TDD mode, the BS may set a pattern for UL and DL allocation for the serving cell through higher layer (eg, RRC) signaling. For example, the following parameters can be used to set the TDD DL-UL pattern:

-Dl-UL-TransmissionPeriodicity providing the period of the DL-UL pattern;

-NrofDownlinkSlots providing the number of consecutive full DL slots at the beginning of each DL-UL pattern, wherein the full slot is a slot having only downlink symbols;

-NrofDownlinkSymbols providing the number of consecutive DL symbols at the beginning of the slot immediately following the last complete DL slot;

-NrofUplinkSlots providing the number of consecutive full UL slots within the end of each DL-UL pattern, wherein the full UL slot is a slot having only uplink symbols; And

-NrofUplinkSymbols providing the number of consecutive UL symbols in the end of the slot immediately preceding the first full UL slot.

Among the symbols in the DL-UL pattern, the remaining symbols that are neither set as DL symbols nor UL symbols are flexible symbols.

The UE that has received the configuration for the TDD DL-UL pattern, that is, the TDD UL-DL configuration (eg, tdd-UL-DL-ConfigurationCommon, or tdd-UL-DLConfigurationDedicated) through higher layer signaling, is slotted based on the configuration. Set the slot format for each slot across the fields.

Meanwhile, various combinations of a DL symbol, a UL symbol, and a flexible symbol for a symbol are possible, but a predetermined number of combinations may be predefined as slot formats, and the predefined slot formats can be identified by slot format indexes, respectively. I can. The following table illustrates some of the predefined slot formats. In the following table, D denotes a DL symbol, U denotes a UL symbol, and F denotes a flexible symbol.

In order to inform which of the predefined slot formats is used in a specific slot, the BS provides a combination of slot formats applicable to the corresponding serving cell for each cell through higher layer (e.g., RRC) signaling for a set of serving cells. A set of these may be set, and the UE may be configured to monitor a group-common PDCCH for a slot format indicator (SFI)(s) through higher layer (eg, RRC) signaling. Hereinafter, the DCI carried by the group-common PDCCH for SFI(s) is referred to as SFI DCI. DCI format 2_0 is used as the SFI DCI. For example, for each serving cell in the set of serving cells, the BS is the (start) position of the slot format combination ID (i.e., SFI-index) for the corresponding serving cell within the SFI DCI, the slot applicable to the serving cell. A set of format combinations, a reference subcarrier interval setting for each slot format in the slot format combination indicated by the SFI-index value in the SFI DCI may be provided to the UE. One or more slot formats are set for each slot format combination in the set of slot format combinations and a slot format combination ID (ie, SFI-index) is assigned. For example, when the BS wants to set a slot format combination with N slot formats, N slots among slot format indexes for slot formats predefined for the slot format combination (eg, see Table 3) Format indexes can be indicated. The BS informs the UE of the total length of the SFI-RNTI, which is the RNTI used for SFI, and the DCI payload scrambled with the SFI-RNTI to configure the UE to monitor the group-common PDCCH for SFIs. When the UE detects the PDCCH based on the SFI-RNTI, the UE may determine the slot format(s) for the corresponding serving cell from the SFI-index for the serving cell among SFI-indexes in the DCI payload within the PDCCH. .

Symbols indicated as flexible by the TDD DL-UL pattern configuration may be indicated as uplink, downlink or flexible by SFI DCI. Symbols indicated as downlink/uplink by TDD DL-UL pattern configuration are not overridden as uplink/downlink or flexible by SFI DCI.

If the TDD DL-UL pattern is not configured, the UE determines whether each slot is uplink or uplink and the symbol allocation within each slot is SFI DCI and/or DCI scheduling or triggering transmission of downlink or uplink signals (e.g., DCI format 1_0, DCI format 1_1, DCI format 1_2, DCI format 0_0, DCI format 0_1, DCI format 0_2, DCI format 2_3).

A UE with carrier aggregation configured may be configured to use one or more cells. When a UE is configured to have a plurality of serving cells, the UE may be configured to have one or a plurality of cell groups. The UE may be configured to have multiple cell groups associated with different BSs. Alternatively, the UE may be configured to have a plurality of cell groups associated with a single BS. Each cell group of the UE is composed of one or more serving cells, and each cell group includes a single PUCCH cell in which PUCCH resources are configured. The PUCCH cell may be a Pcell or an Scell configured as a PUCCH cell among Scells of a corresponding cell group. Each serving cell of the UE belongs to one of the cell groups of the UE and does not belong to a plurality of cell groups.

The NR frequency bands are defined by two types of frequency ranges, FR1 and FR2, and FR2 is also referred to as a millimeter wave (mmW). The following table exemplifies frequency ranges in which NR can operate.

Frequency Range designation	Corresponding frequency range	Subcarrier Spacing
FR1	410MHz-7125MHz	15, 30, 60 kHz
FR2	24250MHz-52600MHz	60, 120, 240 kHz

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

PDCCH carries DCI. For example, the PDCCH (i.e., DCI) is a transmission format and resource allocation of a downlink shared channel (DL-SCH), resource allocation information for an uplink shared channel (UL-SCH), Located above the physical layer among the protocol stacks of UE/BS such as paging information for a paging channel (PCH), system information on the DL-SCH, and random access response (RAR) transmitted on the PDSCH. It carries resource allocation information for a control message of a layer (hereinafter, upper layer), a transmission power control command, and activation/release of configured scheduling (CS). DCI includes a cyclic redundancy check (CRC), and the CRC is masked/scrambled with various identifiers (e.g., radio network temporary identifier (RNTI)) according to the owner or usage of the PDCCH. For example, if the PDCCH is for a specific UE, the CRC is masked with a UE identifier (eg, cell RNTI (C-RNTI)) If the PDCCH is for paging, the CRC is masked with a paging RNTI (P-RNTI). If the PDCCH relates to system information (eg, system information block (SIB), then the CRC is masked with system information RNTI (system information RNTI, SI-RNTI)). If the PDCCH is for random access response, the CRC is Masked with random access RNTI (RA-RATI).

The PDCCH is transmitted through a control resource set (CORESET). One or more CORESET may be set to the UE. CORESET consists of a set of physical resource blocks (PRBs) with a time period of 1 to 3 OFDM symbols. PRBs constituting the CORESET and the CORESET duration may be provided to the UE through higher layer (eg, RRC) signaling. The set of PDCCH candidates within the set CORESET(s) is monitored according to the corresponding search space sets. In the present specification, monitoring implies decoding (aka, blind decoding) each PDCCH candidate according to monitored DCI formats. The master information block (MIB) on the PBCH provides parameters for monitoring the PDCCH (e.g., setting CORESET #0) to the UE for scheduling the PDSCH carrying the system information block (SIB1). do. The PBCH may also indicate that there is no associated SIB1, and in this case, the UE may be indicated not only a frequency range in which it can be assumed that there is no SSB associated with SSB1, but also another frequency to search for an SSB associated with SIB1. CORESET#0, which is a CORESET for scheduling at least SIB1, may be set through MIB or dedicated RRC signaling.

The set of PDCCH candidates monitored by the UE is defined in terms of PDCCH search space sets. The search space set may be a common search space (CSS) set or a UE-specific search space (USS) set. Each CORESET setting is associated with one or more sets of search spaces, and each set of search spaces is associated with one CORESET setting. The search space set is determined based on the following parameters provided to the UE by the BS.

-controlResourceSetId: An identifier that identifies the CORESET associated with the search space set.

-monitoringSlotPeriodicityAndOffset: PDCCH monitoring period and PDCCH monitoring offset for setting slots for PDCCH monitoring.

-duration: the number of consecutive slots that the search space lasts at every time (occasion), that is, in every period as given by monitoringSlotPeriodicityAndOffset.

-monitoringSymbolsWithinSlot: In-slot PDCCH monitoring pattern indicating the first symbol(s) of CORESET in the slot for PDCCH monitoring.

-nrofCandidates: The number of PDCCH candidates per CCE aggregation level.

The UE monitors PDCCH candidates only at PDCCH monitoring occasions. The UE determines the PDCCH monitoring timing from the PDCCH monitoring periodicity, the PDCCH monitoring offset, and the PDCCH monitoring pattern in the slot. The parameter monitoringSymbolsWithinSlot represents, for example, the first symbol(s) for PDCCH monitoring in slots set for PDCCH monitoring (eg, see parameters monitoringSlotPeriodicityAndOffset and duration). For example, if monitoringSymbolsWithinSlot is 14-bit, the most significant (left) bit represents the first OFDM symbol in the slot, and the second most significant (left) bit represents the second OFDM symbol in the slot. In this way, monitoringSymbolsWithinSlot can represent the 14 OFDM symbols of the slot with bits each (respectively). For example, the bit(s) set to 1 of the bits in monitoringSymbolsWithinSlot identifies the first symbol(s) of the CORESET in the slot.

The following table exemplifies search space sets, related RNTIs, and usage examples.

Search Space Set	RNTI	Use Case
Type0-PDCCH CSS set	SI-RNTI on a primary cell	SIB Decoding
Type0A-PDCCH CSS set	SI-RNTI on a primary cell	SIB Decoding
Type1-PDCCH CSS set	RA-RNTI or TC-RNTI on a primary cell	Msg2, Msg4 decoding in RACH
Type2-PDCCH CSS set	P-RNTI on a primary cell	Paging Decoding
Type3-PDCCH CSS set	INT-RNTI, SFI-RNTI, TPC-PUSCH-RNTI, TPC-PUCCH-RNTI, TPC-SRS-RNTI, C-RNTI, MCS-C-RNTI, or CS-RNTI(s)
USS set	C-RNTI, or MCS-C-RNTI, or CS-RNTI(s)	User specific PDSCH decoding

The following table exemplifies DCI formats that the PDCCH can carry.

DCI format	Usage
0_0	Scheduling of PUSCH in one cell
0_1	Scheduling of PUSCH in one cell
1_0	Scheduling of PDSCH in one cell
1_1	Scheduling of PDSCH in one cell
2_0	Notifying a group of UEs of the slot format
2_1	Notifying a group of UEs of the PRB(s) and OFDM symbol(s) where UE may assume no transmission is intended for the UE
2_2	Transmission of TPC commands for PUCCH and PUSCH
2_3	Transmission of a group of TPC commands for SRS transmissions by one or more UEs

DCI format 0_0 is used to schedule a transport block (TB)-based (or TB-level) PUSCH, and DCI format 0_1 is a TB-based (or TB-level) PUSCH or code block group (CBG) ) Can be used to schedule a base (or CBG-level) PUSCH. DCI format 1_0 is used to schedule TB-based (or TB-level) PDSCH, DCI format 1_1 is used to schedule TB-based (or TB-level) PDSCH or CBG-based (or CBG-level) PDSCH I can. DCI format 0_0 and DCI format 1_0 have a fixed size after the BWP size is initially given by RRC, and DCI format 0_1 and DCI format 1_1 have the size of the DCI field to be changed through various RRC reconfiguration by BS. I can. DCI format 2_0 may be used to deliver dynamic slot format information (eg, SFI DCI) to the UE, and DCI format 2_1 may be used to deliver downlink pre-Emption information to the UE.

For example, each of DCI format 0_0 and DCI format 0_1 includes a frequency domain resource allocation field for scheduling of PUSCH, and each of DCI format 1_0 and DCI format 1_1 includes a frequency domain resource allocation field for scheduling of PDSCH. . The number of bits in the frequency domain resource field of each of DCI format 0_0 and DCI format 0_1 is determined based on NRBUL and BWP, which are the sizes of active or initial UL BWP. The number of bits in the frequency domain resource field of each of DCI format 1_0 and DCI format 1_1 is determined based on NRBDL and BWP, which are the sizes of active or initial UL BWP.

Fields defined in DCI formats are mapped to information bits a0 to aA-1 as follows. The first field of the DCI format is mapped to the lowest order information bit a0, and each successive field is mapped to higher order information bits. The most significant bit (MSB) of each field is mapped to the lowest order information bit for that field. For example, the MSB of the first field is mapped to a0. If the number of information bits in the DCI format is less than 12 bits, zeros are appended to the DCI format until the payload size is 12. If necessary, the size of each DCI format is adjusted according to the following DCI size alignment.

If necessary, DCI size alignment is performed to reduce the complexity of blind decoding by the UE. For example, in some scenarios, if necessary, padding or truncation is applied to the DCI formats according to the following steps executed in the following order:

Step 0:

-DCI format 0_0 monitored in CSS is determined, where NRBUL,BWP is the size of the initial UL BWP.

-Determine the DCI format 1_0 to be monitored in CSS, where NRBDL,BWP is given by:

-The size of CORESET#0 if CORESET#0 is set for that cell; And

-The size of the initial DL BWP if CORESET#0 is not set for that cell.

-If DCI format 0_0 is monitored in CSS and prior to padding (prior to), if the number of information bits in the DCI format 0_0 is less than the payload size of the DCI format 1_0 monitored in CSS for scheduling the same serving cell, The number of zero padding bits is generated for DCI format 0_0 until the payload size is equal to that of the DCI format 1_0.

-If DCI format 0_0 is monitored in CSS, and if the number of information bits in the DCI format 0_0 prior to truncation is greater than the payload size of the DCI format 1_0 monitored in CSS for scheduling the same serving cell, the DCI format 0_0 The bitwidth of the frequency domain resource allocation field in the DCI format 0_0 is reduced by truncating the first few MBSs so that the size becomes the same as the size of the DCI format 1_0.

Step 1:

-Determine the DCI format 0_0 monitored in USS, where NRBUL,BWP is the size of the active UL BWP.

-Determine the DCI format 1_0 monitored in USS, where NRBDL,BWP is the size of the active DL BWP.

-If DCI format 0_0 is monitored in the USS, and if the number of information bits in the DCI format 0_0 prior to padding is less than the size of the DCI format 1_0 monitored in the USS for scheduling the same serving cell, the payload size is the Zeros are attached to the DCI format 0_0 until it is equal to that of DCI format 1_0.

-When DCI format 1_0 is monitored in the USS and if the number of information bits in the DCI format 1_0 prior to padding is less than the payload size of the DCI format 0_0 monitored in the USS for scheduling the same serving cell, the payload size Zeros are attached to the DCI format 1_0 until is equal to that of the DCI format 0_0.

Step 2:

-When the size of DCI format 0_1 is monitored in USS, if the size of DCI format 0_1 is the same as that of DCI format 0_0/1_0 monitored in another USS, zero padding of 1 bit is attached to DCI format 0_1.

-When monitored in USS, if the size of DCI format 1_1 is the same as that of DCI format 0_0/1_0 monitored in other USS, zero padding of 1 bit is attached to DCI format 1_1.

Step 3:

-When both of the following conditions are satisfied, the DCI size alignment process is complete:

-The total number of different DCI sizes is not more than 4 for that cell;

-The total number of different DCI sizes with C-RNTI configured to monitor is not more than 3 for that cell.

Step 4:

-Otherwisewise

-Remove the padding bit (if any) introduced in step 2 above.

-Determine the DCI format 1_0 to be monitored in USS, where NRBDL,BWP is given by:

-The size of CORESET#0 if CORESET#0 is set for that cell; And

-The size of the initial DL BWP if CORESET#0 is not set for that cell.

-Determine the DCI format 0_0 monitored in USS, where NRBUL,BWP is the size of the initial UL BWP.

-If the number of information bits in the DCI format 0_0 monitored by the USS prior to padding is less than the payload size of the DCI format 1_0 monitored by the USS for scheduling the same serving cell, the payload size is The number of zero padding bits is generated for DCI format 0_0 monitored in USS until equal to that of the DCI format 1_0 monitored in USS.

-If the number of information bits in the DCI format 0_0 monitored by the USS prior to truncation is greater than the payload size of the DCI format 1_0 monitored by the USS for scheduling the same serving cell, the size of the DCI format 0_0 monitored by the USS The bitwidth of the frequency domain resource allocation field in the DCI format 0_0 is reduced by truncating the first few MBSs so that is equal to the size of the DCI format 1_0 monitored in the USS.

Hereinafter, for convenience of description, the DCI size alignment process is referred to as a “first DCI size alignment process”.

The UE is not expected to process the configuration resulting in the following after applying the above steps:

-The total number of different DCI sizes set to monitor is more than 4 for that cell; or

-The total number of different DCI sizes with C-RNTI configured to monitor is more than 3 for that cell; or

-The size of DCI format 0_0 in USS is the same as DCI format 0_1 in another USS; or

-The size of DCI format 1_0 in USS is the same as DCI format 1_1 in other USS.

The UE and BS may perform the DCI size alignment process. The BS may set parameters that affect the DCI size, and the UE may determine the DCI size(s) to be monitored by the UE in a corresponding cell based on the parameters. In the parameters affecting the DCI size, for example, frequency domain resource allocation, time domain resource allocation, PDSCH-to-HARQ feedback timing indicator, antenna port, BWP indicator, and/or SRS resource indicators influence the DCI size. I can go crazy. The UE and BS may determine whether to perform a DCI size alignment process for a cell based on the above parameters. The BS may transmit DCI(s) on the corresponding cell based on the DCI size(s) adjusted according to the DCI size alignment process. The UE expects to transmit DCI(s) having the DCI size(s) adjusted according to the DCI size alignment process for the cell on the cell, and may perform DCI monitoring (that is, PDCCH monitoring). In other words, the UE may perform DCI monitoring based on the DCI size(s) adjusted according to the DCI size alignment process for the cell.

PDSCH is a physical layer UL channel for UL data transport. The PDSCH carries downlink data (e.g., a DL-SCH transport block), and modulation methods such as Quadrature Phase Shift Keying (QPSK), 16 Quadrature Amplitude Modulation (QAM), 64 QAM, and 256 QAM are applied. A codeword is generated by encoding a transport block (TB). The PDSCH can carry up to two codewords. Scrambling and modulation mapping are performed for each codeword, and modulation symbols generated from each codeword may be mapped to one or more layers. Each layer is mapped to a radio resource together with a DMRS to generate an OFDM symbol signal, and is transmitted through a corresponding antenna port.

PUCCH means a physical layer UL channel for UCI transmission. PUCCH carries UCI (Uplink Control Information). UCI includes:

-Scheduling request (SR): This is information used to request UL-SCH resources.

-Hybrid automatic repeat request (HARQ)-acknowledgement (ACK): This is a response to a downlink data packet (eg, codeword) on the PDSCH. Indicates whether a downlink data packet has been successfully received by the communication device. HARQ-ACK 1 bit may be transmitted in response to a single codeword, and HARQ-ACK 2 bits may be transmitted in response to two codewords. The HARQ-ACK response includes positive ACK (simply, ACK), negative ACK (NACK), DTX or NACK/DTX. Here, the term HARQ-ACK is mixed with HARQ ACK/NACK, ACK/NACK, or A/N.

-Channel state information (CSI): This is feedback information on a downlink channel. CSI is channel quality information (CQI), rank indicator (rank indicator, RI), precoding matrix indicator (PMI), CSI-RS resource indicator (CSI-RS resource indicator, CRI), SS /PBCH resource block indicator, SSBRI), may include a layer indicator (layer indicator, LI). CSI may be divided into CSI part 1 and CSI part 2 according to the UCI type included in the CSI. For example, CRI, RI, and/or CQI for the first codeword may be included in CSI Part 1, and CQI for LI, PMI, and the second codeword may be included in CSI Part 2.

In this specification, for convenience, PUCCH resources set and/or indicated by the BS to the UE for HARQ-ACK, SR, and CSI transmission are referred to as HARQ-ACK PUCCH resources, SR PUCCH resources, and CSI PUCCH resources, respectively.

The PUCCH format may be classified as follows according to the UCI payload size and/or transmission length (eg, the number of symbols constituting the PUCCH resource). For information on the PUCCH format, refer to Table 7 together.

(0) PUCCH format 0 (PF0, F0)

-Supportable UCI payload size: up to K bits (e.g. K = 2)

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

-Transmission structure: PUCCH format 0 consists of only UCI signals without DMRS, and the UE transmits the UCI state by selecting and transmitting one of a plurality of sequences. For example, the UE transmits a specific UCI to the BS by transmitting one of a plurality of sequences through PUCCH of PUCCH format 0. The UE transmits the PUCCH of PUCCH format 0 in the PUCCH resource for SR configuration corresponding to only when transmitting a positive SR.

-The setting for PUCCH format 0 includes the following parameters for the corresponding PUCCH resource: an index for initial cyclic transition, the number of symbols for PUCCH transmission, and the first symbol for the PUCCH transmission.

(1) PUCCH format 1 (PF1, F1)

-Supportable UCI payload size: up to K bits (e.g. K = 2)

-Number of OFDM symbols constituting a single PUCCH: Y ~ Z symbols (e.g., Y = 4, Z = 14)

-Transmission structure: DMRS and UCI are set/mapped to different OFDM symbols in the form of TDM. That is, the DMRS is transmitted in a symbol in which a modulation symbol is not transmitted. UCI is expressed by multiplying a specific sequence (eg, orthogonal cover code (OCC)) by a modulation (eg, QPSK) symbol. By applying a cyclic shift (CS)/OCC to both UCI and DMRS ( Code division multiplexing (CDM) is supported between multiple PUCCH resources (according to PUCCH format 1) within the same RB. PUCCH format 1 carries UCI with a maximum size of 2 bits, and the modulation symbol is in the time domain. Is spread by an orthogonal cover code (OCC) (which is set differently depending on whether or not frequency hopping).

-The setting for PUCCH format 1 includes the following parameters for the corresponding PUCCH resource: index for initial cyclic transition, number of symbols for PUCCH transmission, first symbol for PUCCH transmission, orthogonal cover code Index for ).

(2) PUCCH format 2 (PF2, F2)

-Supportable UCI payload size: more than K bits (e.g. K = 2)

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

-Transmission structure: DMRS and UCI are configured/mapped in the form of frequency division multiplex (FDM) within the same symbol. The UE transmits the coded UCI bits by applying only IFFT without DFT. PUCCH format 2 carries UCI of a bit size larger than K bits, and a modulation symbol is transmitted after FDM with DMRS. For example, the DMRS is located at symbol indexes #1, #4, #7, and #10 in a given resource block with a density of 1/3. A pseudo noise (PN) sequence is used for the DMRS sequence. Frequency hopping may be activated for 2-symbol PUCCH format 2.

-The setting for PUCCH format 2 includes the following parameters for the corresponding PUCCH resource: the number of PRBs, the number of symbols for PUCCH transmission, the first symbol for the PUCCH transmission.

(3) PUCCH format 3 (PF3, F3)

-Supportable UCI payload size: more than K bits (e.g. K = 2)

-Number of OFDM symbols constituting a single PUCCH: Y ~ Z symbols (e.g., Y = 4, Z = 14)

-Transmission structure: DMRS and UCI are set/mapped to different symbols in the form of TDM. The UE transmits by applying DFT to the coded UCI bits. PUCCH format 3 does not support UE multiplexing for the same time-frequency resource (eg, the same PRB).

-The setting for PUCCH format 3 includes the following parameters for the corresponding PUCCH resource: the number of PRBs, the number of symbols for PUCCH transmission, the first symbol for the PUCCH transmission.

(4) PUCCH format 4 (PF4, F4)

-Supportable UCI payload size: more than K bits (e.g. K = 2)

-Number of OFDM symbols constituting a single PUCCH: Y ~ Z symbols (e.g., Y = 4, Z = 14)

-Transmission structure: DMRS and UCI are set/mapped to different symbols in the form of TDM. PUCCH format 4 can multiplex up to 4 UEs in the same PRB by applying OCC at the front end of the DFT and CS (or interleaved FDM (IFDM) mapping) for DMRS. In other words, the modulation symbols of UCI are transmitted after DMRS and TDM (Time Division Multiplexing).

-The configuration for PUCCH format 4 includes the following parameters for the corresponding PUCCH resource: the number of symbols for PUCCH transmission, length for orthogonal cover code, index for orthogonal cover code, first symbol for the PUCCH transmission.

The following table illustrates PUCCH formats. Depending on the PUCCH transmission length, it may be divided into short PUCCH (formats 0, 2) and long PUCCH (formats 1, 3, 4).

PUCCH format	Length in OFDM symbols N PUCCH symb	Number of bits	Usage	Etc.
0	1-2	=<2	HARQ, SR	Sequence selection
One	4-14	=<2	HARQ, [SR]	Sequence modulation
2	1-2	>2	HARQ, CSI, [SR]	CP-OFDM
3	4-14	>2	HARQ, CSI, [SR]	DFT-s-OFDM (no UE multiplexing)
4	4-14	>2	HARQ, CSI, [SR]	DFT-s-OFDM(Pre DFT OCC)

PUCCH resources may be determined for each UCI type (eg, A/N, SR, CSI). PUCCH resources used for UCI transmission may be determined based on UCI (payload) size. For example, the BS configures a plurality of PUCCH resource sets to the UE, and the UE may select a specific PUCCH resource set corresponding to a specific range according to the range of the UCI (payload) size (eg, the number of UCI bits). For example, the UE may select one of the following PUCCH resource sets according to the number of UCI bits (NUCI):-PUCCH resource set #0, if the number of UCI bits = <2

-PUCCH resource set #1, if 2< number of UCI bits =< N1

...

-PUCCH resource set #(K-1), if NK-2 <number of UCI bits = <NK-1

Here, K is the number of PUCCH resource sets (K>1), and Ni is the maximum number of UCI bits supported by the PUCCH resource set #i. For example, PUCCH resource set #1 may be composed of resources of PUCCH format 0 to 1, and other PUCCH resource sets may be composed of resources of PUCCH format 2 to 4 (see Table 7).

The setting for each PUCCH resource includes a PUCCH resource index, a starting PRB index, a setting for one of PUCCH formats 0 to PUCCH 4, and the like. In the UE, the code rate for multiplexing HARQ-ACK, SR and CSI report(s) in PUCCH transmission using PUCCH format 2, PUCCH format 3, or PUCCH format 4 is set to the UE by the BS through the upper layer parameter maxCodeRate. . The upper layer parameter maxCodeRate is used to determine how to feed back UCI on PUCCH resources for PUCCH formats 2, 3 or 4.

When the UCI type is SR or CSI, the PUCCH resource to be used for UCI transmission in the PUCCH resource set may be configured to the UE by the network through higher layer signaling (eg, RRC signaling). When the UCI type is HARQ-ACK for the SPS (Semi-Persistent Scheduling) PDSCH, the PUCCH resource to be used for UCI transmission within the PUCCH resource set may be set to the UE by the network through higher layer signaling (e.g., RRC signaling). have. On the other hand, when the UCI type is HARQ-ACK for a PDSCH scheduled by DCI, a PUCCH resource to be used for UCI transmission within a PUCCH resource set may be scheduled based on DCI.

In the case of DCI-based PUCCH resource scheduling, the BS transmits the DCI to the UE through the PDCCH, and the PUCCH to be used for UCI transmission within a specific PUCCH resource set through the ACK/NACK resource indicator (ARI) in the DCI. Resources can be directed. ARI is used to indicate PUCCH resources for ACK/NACK transmission, and may also be referred to as a PUCCH resource indicator (PUCCH resource indicator, PRI). Here, DCI is a DCI used for PDSCH scheduling, and UCI may include HARQ-ACK for PDSCH. Meanwhile, the BS may set a PUCCH resource set consisting of PUCCH resources larger than the number of states that can be represented by the ARI using a (UE-specific) higher layer (eg, RRC) signal. At this time, the ARI indicates a PUCCH resource sub-set within the PUCCH resource set, and which PUCCH resource is to be used in the indicated PUCCH resource sub-set is transmission resource information for the PDCCH (e.g., PDCCH start control channel element (control channel element, CCE) index, etc.) based on an implicit rule.

The UE must have uplink resources available to the UE for UL-SCH data transmission, and must have downlink resources available to the UE for DL-SCH data reception. Uplink resources and downlink resources are assigned to the UE through resource allocation by the BS. Resource allocation may include time domain resource allocation (TDRA) and frequency domain resource allocation (FDRA). In this specification, uplink resource allocation is also referred to as an uplink grant, and downlink resource allocation is also referred to as a downlink allocation. The uplink grant is dynamically received on the PDCCH or in the RAR by the UE, or is set semi-persistently to the UE by RRC signaling from the BS. The downlink assignment is dynamically received on the PDCCH by the UE, or is semi-continuously set to the UE by RRC signaling from the BS.

In the UL, the BS may dynamically allocate uplink resources to the UE through PDCCH(s) addressed to a cell radio network temporary identifier (C-RNTI). The UE monitors the PDCCH(s) to find possible uplink grant(s) for UL transmission. In addition, the BS can allocate uplink resources using a grant set to the UE. Two types of set grants, type 1 and type 2, can be used. In the case of type 1, the BS directly provides a set uplink grant (including a period) through RRC signaling. In the case of type 2, the BS sets the period of the RRC configured uplink grant through RRC signaling, and the configured scheduling RNTI (configured scheduling RNTI, CS-RNTI) through the PDCCH (PDCCH addressed to CS-RNTI) The uplink grant may be signaled and activated or may be deactivated. For example, in the case of type 2, the PDCCH addressed as CS-RNTI indicates that the corresponding uplink grant can be implicitly reused according to a period set by RRC signaling until deactivation.

In the DL, the BS can dynamically allocate downlink resources to the UE through PDCCH(s) addressed with C-RNTI. The UE monitors the PDCCH(s) to find possible downlink assignments. In addition, the BS may allocate downlink resources to the UE using semi-static scheduling (SPS). The BS may set a period of downlink assignments set through RRC signaling, and may signal and activate the set downlink assignment through the PDCCH addressed to CS-RNTI, or deactivate it. For example, the PDCCH addressed to CS-RNTI indicates that the corresponding downlink assignment can be implicitly reused according to a period set by RRC signaling until deactivation.

Hereinafter, resource allocation by PDCCH and resource allocation by RRC will be described in more detail.

* Resource allocation by PDCCH: dynamic grant/allocation

The PDCCH can be used to schedule DL transmission on the PDSCH or UL transmission on the PUSCH. DCI on the PDCCH for scheduling DL transmission may include DL resource allocation including at least a modulation and coding format (e.g., modulation and coding scheme (MCS) index IMCS), resource allocation, and HARQ information related to the DL-SCH. have. The DCI on the PDCCH for scheduling UL transmission may include an uplink scheduling grant that includes at least a modulation and coding format, resource allocation, and HARQ information related to UL-SCH. The size and use of DCI carried by one PDCCH differs according to the DCI format. For example, DCI format 0_0, DCI format 0_1, or DCI format 0_2 may be used for scheduling a PUSCH, and DCI format 1_0, DCI format 1_1, or DCI format 1_2 may be used for scheduling a PDSCH. In particular, DCI format 0_2 and DCI format 1_2 have higher transmission reliability and lower latency than the transmission reliability and latency requirements guaranteed by DCI format 0_0, DCI format 0_1, DCI format 1_0, and DCI format 1_1. It can be used to schedule transmissions with requirements. Some implementations of this specification may be applied to UL data transmission based on DCL format 0_2. Some implementations of this specification may be applied to DL data reception based on DCI format 1_2.

7 shows an example of PDSCH time domain resource allocation by PDCCH and an example of PUSCH time domain resource allocation by PDCCH.

The DCI carried by the PDCCH to schedule the PDSCH or PUSCH includes a time domain resource assignment (TDRA) field, and the TDRA field is a row to an allocation table for PDSCH or PUSCH. ) Provide the value m for index m+1. A predefined default PDSCH time domain allocation is applied as the allocation table for the PDSCH, or the PDSCH time domain resource allocation table set by the BS through the RRC signaling pdsch-TimeDomainAllocationList is applied as the allocation table for the PDSCH. A predefined default PUSCH time domain allocation is applied as the allocation table for the PDSCH, or the PUSCH time domain resource allocation table set by the BS through the RRC signaling pusch-TimeDomainAllocationList is applied as the allocation table for the PUSCH. The PDSCH time domain resource allocation table to be applied and/or the PUSCH time domain resource allocation table to be applied may be determined according to a fixed/predefined rule (eg, see 3GPP TS 38.214).

In the PDSCH time domain resource configurations, each indexed row is assigned a DL allocation-to-PDSCH slot offset K0, a start and length indicator SLIV (or directly a start position of a PDSCH in the slot (eg, start symbol index S) and an allocation length (eg , The number of symbols L)), defines the PDSCH mapping type. In the PUSCH time domain resource settings, each indexed row is a UL grant-to-PUSCH slot offset K2, a start position of a PUSCH in the slot (eg, start symbol index S) and an allocation length (eg, number of symbols L), and PUSCH mapping type. Defines K0 for PDSCH or K2 for PUSCH indicates a difference between a slot with a PDCCH and a slot with a PDSCH or PUSCH corresponding to the PDCCH. SLIV is a joint indication of a start symbol S relative to the start of a slot having a PDSCH or PUSCH and the number L of consecutive symbols counted from the symbol S. In the case of the PDSCH/PUSCH mapping type, there are two types of mapping: one is mapping type A and the other is mapping type B. In the case of PDSCH/PUSCH mapping type A, a demodulation reference signal (DMRS) is located in a third symbol (symbol #2) or a fourth symbol (symbol #3) in a slot according to RRC signaling. In the case of PDSCH/PUSCH mapping type B, the DMRS is located in the first symbol allocated for PDSCH/PUSCH.

The scheduling DCI includes a frequency domain resource assignment (FDRA) field that provides assignment information on resource blocks used for PDSCH or PUSCH. For example, the FDRA field provides the UE with information about a cell for PDSCH or PUSCCH transmission, information about a BWP for PDSCH or PUSCH transmission, and information about resource blocks for PDSCH or PUSCH transmission.

* Resource allocation by RRC

As mentioned above, in the case of uplink, there are two types of transmission without a dynamic grant: an established grant type 1 and an established grant type 2. In the case of an established grant type 1, a UL grant is provided by RRC signaling and is a configured grant. Is saved. In the case of the configured grant type 2, the UL grant is provided by the PDCCH and is stored or cleared as an uplink grant configured based on L1 signaling indicating activation or deactivation of the configured uplink grant. Type 1 and Type 2 may be set by RRC signaling for each serving cell and for each BWP. Multiple settings can be active simultaneously on different serving cells.

When the configured grant type 1 is configured, the UE may receive the following parameters from the BS through RRC signaling:

-CS-RNTI for retransmission, cs-RNTI;

-Periodicity, which is the set grant type 1 period;

-TimeDomainOffset indicating an offset of a resource for a system frame number (SFN) = 0 in the time domain;

-A timeDomainAllocation value m, which provides a row index m+1 pointing to an allocation table, indicating a combination of a start symbol S, a length L, and a PUSCH mapping type;

-FrequencyDomainAllocation providing frequency domain resource allocation; And

-McsAndTBS providing IMCS indicating modulation order, target code rate and transport block size.

When setting the configuration grant type 1 for the serving cell by RRC, the UE stores the UL grant provided by RRC as a configured uplink grant for the indicated serving cell, and in timeDomainOffset and S (derived from SLIV) Initialize or re-initialize so that the configured uplink grant starts in the corresponding symbol and recurs with periodicity. After the uplink grant is configured for the configured grant type 1, the UE may consider that the uplink grant recurs in association with each symbol that satisfies the following: [(SFN * numberOfSlotsPerFrame (numberOfSymbolsPerSlot) + ( slot number in the frame * numberOfSymbolsPerSlot) + symbol number in the slot] = (timeDomainOffset * numberOfSymbolsPerSlot + S + N * periodicity) modulo (1024 * numberOfSlotsPerFrame * numberOfSymbolsPerSlot), for all N >= 0, where numberOfSlotsPerFrame and numberOfSymbolsPerSlot are per frame The number of consecutive slots and consecutive OFDM symbols for each slot are shown, respectively (see Table 1 and Table 2).

When the configured grant type 2 is configured, the UE may receive the following parameters from the BS through RRC signaling:

-Cs-RNTI, CS-RNTI for activation, deactivation, and retransmission; And

-Periodicity that provides the set grant type 2 period.

The actual uplink grant is provided to the UE by the PDCCH (addressed with CS-RNTI). After the uplink grant is configured for the configured grant type 2, the UE may consider that the uplink grant recurs in association with each symbol that satisfies the following: [(SFN * numberOfSlotsPerFrame * numberOfSymbolsPerSlot) + (slot number in the frame * numberOfSymbolsPerSlot) + symbol number in the slot] = [(SFNstart time * numberOfSlotsPerFrame * numberOfSymbolsPerSlot + slotstart time * numberOfSymbolsPerSlot + symbolstart time) + N * periodicity] modulo (1024 * numberOfSlotsPerFrame * numberOfSymbolsPerSlot), for all> 0 , Here, SFNstart time, slotstart time, and symbolstart time represent SFN, slot, and symbol of the first transmission opportunity of the PUSCH after the set grant is (re-)initialized, respectively (respectively), numberOfSlotsPerFrame and numberOfSymbolsPerSlot are The number of consecutive slots per frame and consecutive OFDM symbols per slot are shown, respectively (see Tables 1 and 2).

In the case of downlink, the UE may be configured with semi-persistent scheduling (SPS) for each serving cell and for each BWP by RRC signaling from the BS. In the case of DL SPS, DL allocation is provided to the UE by PDCCH, and is stored or removed based on L1 signaling indicating SPS activation or deactivation. When the SPS is configured, the UE may receive the following parameters from the BS through RRC signaling:

-Cs-RNTI, CS-RNTI for activation, deactivation, and retransmission;

-NrofHARQ-Processes providing the number of HARQ processes configured for SPS;

-A periodicity that provides a period of downlink allocation set for SPS.

After downlink assignment is set for SPS, the UE may sequentially consider that the N-th downlink assignment occurs in a slot that satisfies the following: (numberOfSlotsPerFrame * SFN + slot number in the frame ) = [(numberOfSlotsPerFrame * SFNstart time + slotstart time) + N * periodicity * numberOfSlotsPerFrame / 10] modulo (1024 * numberOfSlotsPerFrame), where SFNstart time and slotstart time are the first of the PDSCH after the set downlink allocation is (re-)initialized. SFN, slot, and symbol of the th transmission are respectively represented, and numberOfSlotsPerFrame and numberOfSymbolsPerSlot represent the number of consecutive slots per frame and consecutive OFDM symbols per slot, respectively (see Tables 1 and 2).

The cyclic redundancy check (CRC) of the DCI format is scrambled with the CS-RNTI provided by the RRC parameter cs-RNTI, and the new data indicator field for the enabled transport block is set to 0. If there is, the UE confirms that the DL SPS allocated PDCCH or the configured UL grant type 2 PDCCH is valid for scheduling activation or scheduling cancellation. If all fields for the DCI format are set according to Table 8 or Table 9, validity confirmation of the DCI format is achieved. Table 8 exemplifies special fields for validating DL SPS and UL grant type 2 scheduling activation PDCCH, and Table 9 exemplifies special fields for validating DL SPS and UL grant type 2 scheduling release PDCCH.

	DCI format 0_0/0_1	DCI format 1_0	DCI format 1_1
HARQ process number	set to all '0's	set to all '0's	set to all '0's
Redundancy version	set to '00'	set to '00'	For the enabled transport block: set to '00'

	DCI format 0_0	DCI format 1_0
HARQ process number	set to all '0's	set to all '0's
Redundancy version	set to '00'	set to '00'
Modulation and coding scheme	set to all '1's	set to all '1's
Resource block assignment	set to all '1's	set to all '1's

The actual DL allocation or UL grant for DL SPS or UL grant type 2, and the corresponding modulation and coding scheme are resource allocation fields in the DCI format carried by the corresponding DL SPS or UL grant type 2 scheduling activation PDCCH ( Yes, it is provided by a TDRA field providing a TDRA value m, an FDRA field providing a frequency resource block allocation, and a modulation and coding scheme field). When validity check is achieved, the UE considers the information in the DCI format to be valid activation or valid release of DL SPS or configured UL grant type 2.

8 illustrates a HARQ-ACK transmission/reception process.

Referring to FIG. 8, the UE may detect a PDCCH in slot n. Thereafter, the UE may receive the PDSCH in slot n+K0 according to the scheduling information received through the PDCCH in slot n, and then transmit UCI through the PUCCH in slot n+K1. Here, the UCI includes a HARQ-ACK response for the PDSCH.

The DCI (eg, DCI format 1_0, DCI format 1_1) carried by the PDCCH scheduling the PDSCH may include the following information.

-Frequency domain resource assignment (FDRA): Represents a set of RBs allocated to the PDSCH.

-Time domain resource assignment (TDRA): DL assignment-to-PDSCH slot offset K0, the starting position of the PDSCH in the slot (eg, symbol index S) and length (eg, number of symbols L), PDSCH mapping type Represents. PDSCH mapping type A or PDSCH mapping type B may be indicated by TDRA. In the case of PDSCH mapping type A, the DMRS is located in the third symbol (symbol #2) or the fourth symbol (symbol #3) in the slot. In the case of PDSCH mapping type B, the DMRS is located in the first symbol allocated for the PDSCH.

-PDSCH-to-HARQ_feedback timing indicator: indicates K1.

When the PDSCH is configured to transmit a maximum of 1 TB, the HARQ-ACK response may consist of 1-bit. When the PDSCH is set to transmit up to two transport blocks (TB), the HARQ-ACK response is composed of 2-bits when spatial bundling is not set, and 1-bits when spatial bundling is set. I can. When the HARQ-ACK transmission time point for a plurality of PDSCHs is designated as slot n+K1, the UCI transmitted in slot n+K1 includes HARQ-ACK responses for the plurality of PDSCHs.

In this specification, a HARQ-ACK payload composed of HARQ-ACK bit(s) for one or a plurality of PDSCHs may be referred to as a HARQ-ACK codebook. The HARQ-ACK codebook may be classified into a semi-static HARQ-ACK codebook and a dynamic HARQ-ACK codebook according to a method in which the HARQ-ACK payload is determined.

In the case of a semi-static HARQ-ACK codebook, parameters related to the size of the HARQ-ACK payload to be reported by the UE are semi-statically set by a (UE-specific) upper layer (eg, RRC) signal. For example, the HARQ-ACK payload size of the semi-static HARQ-ACK codebook is, the (maximum) HARQ-ACK payload (size) transmitted through one PUCCH in one slot is all DL carriers set to the UE. (I.e., DL serving cells) and the number of HARQ-ACK bits corresponding to a combination of all DL scheduling slots (or PDSCH transmission slots or PDCCH monitoring slots) in which the HARQ-ACK transmission timing can be indicated (hereinafter, bundling window) Can be determined based on That is, in the semi-static HARQ-ACK codebook scheme, the size of the HARQ-ACK codebook is fixed (to a maximum value) regardless of the actual number of 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 may have one of a plurality of values (eg, k). For example, if the PDSCH is received in slot #m and the PDSCH to HARQ-ACK timing information in the DL grant DCI (PDCCH) scheduling the PDSCH indicates k, the HARQ-ACK information for the PDSCH is slot # It can be transmitted at (m+k). For example, it can be given as k ∈ {1, 2, 3, 4, 5, 6, 7, 8}. Meanwhile, when HARQ-ACK information is transmitted in slot #n, the HARQ-ACK information may include a maximum possible HARQ-ACK based on the bundling window. That is, HARQ-ACK information of slot #n may include HARQ-ACK corresponding to slot #(n-k). For example, if k ∈ {1, 2, 3, 4, 5, 6, 7, 8}, HARQ-ACK information of slot #n is slot #(n-8)~ regardless of actual DL data reception. Includes HARQ-ACK corresponding to slot # (n-1) (ie, the maximum number of HARQ-ACKs). Here, the HARQ-ACK information may be replaced with the HARQ-ACK codebook and the HARQ-ACK payload. In addition, the slot may be understood/replaced as a candidate opportunity for DL data reception. As an example, the bundling window is determined based on the PDSCH-to-HARQ-ACK timing based on the HARQ-ACK slot, and the PDSCH-to-HARQ-ACK timing set has a pre-defined value (eg, { 1, 2, 3, 4, 5, 6, 7, 8}), and may be set by higher layer (RRC) signaling. Meanwhile, in the case of a dynamic HARQ-ACK codebook, the size of the HARQ-ACK payload to be reported by the UE may be dynamically changed by DCI or the like. In the dynamic HARQ-ACK codebook scheme, the DL scheduling DCI may include counter-DAI (ie, c-DAI) and/or total-DAI (ie, t-DAI). Here, DAI means a downlink assignment index, and is used by the BS to inform the UE of the transmitted or scheduled PDSCH(s) to be included in one HARQ-ACK transmission. In particular, c-DAI is an index indicating the order of PDCCHs carrying DL scheduling DCI (hereinafter, DL scheduling PDCCH), and t-DAI is the total number of DL scheduling PDCCHs up to the current slot in which the PDCCH with t-DAI is located. It is an index to indicate.

In the NR system, a method of implementing a plurality of logical networks on a single physical network is being considered. Here, the logical network must be able to support services having various requirements (eg, eMBB, mMTC, URLLC, etc.). Therefore, the physical layer of the NR is designed to support a flexible transmission structure in consideration of requirements for various services. As an example, the physical layer of the NR may change the OFDM symbol length (OFDM symbol duration) and subcarrier spacing (SCS) (hereinafter, OFDM neurology) as necessary. Also, transmission resources of physical channels may be changed within a certain range (in units of symbols). For example, in the NR, the transmission length/transmission start time of the PUCCH (resource) and the PUSCH (resource) may be flexibly set within a certain range.

Meanwhile, in a wireless communication system including a BS and a UE, when the UE transmits UCI to PUCCH, PUCCH resources may overlap with other PUCCH resources or PUSCH resources in the time axis. For example, from the viewpoint of the same UE (in the same slot) (1) (for different UCI transmission) PUCCH (resource) and PUCCH (resource), or (2) PUCCH (resource) and PUSCH (resource) are time axis Can be nested in Meanwhile, the UE may not support simultaneous PUCCH-PUCCH transmission or simultaneous PUCCH-PUSCH transmission (according to the limitation of UE capability or configuration information received from the BS). In addition, it may not be allowed for the UE to simultaneously transmit multiple UL channels within a certain time range.

In this specification, when a plurality of UL channels to be transmitted by a UE exist within a predetermined time range, methods of handling the plurality of UL channels are described. In addition, in the present specification, methods of handling UCI and/or data that should have been transmitted/received on the plurality of UL channels are described. In the description of examples of this specification, the following terms are used.

-UCI: refers to control information transmitted by the UE by UL. UCI includes various types of control information (ie, UCI type). For example, UCI may include HARQ-ACK (briefly, A/N, AN), SR, and/or CSI.

-UCI multiplexing: This may mean an operation of transmitting different UCI (types) through a common physical layer UL channel (eg, PUCCH, PUSCH). UCI multiplexing may include multiplexing different UCIs (types). For convenience, the multiplexed UCI is referred to as MUX UCI. In addition, UCI multiplexing may include an operation performed in relation to the MUX UCI. For example, UCI multiplexing may include a process of determining UL channel resources to transmit MUX UCI.

-UCI/data multiplexing: This may mean an operation of transmitting UCI and data through a common physical layer UL channel (eg, PUSCH). UCI/data multiplexing may include multiplexing UCI and data. For convenience, the multiplexed UCI is referred to as MUX UCI/Data. In addition, UCI/data multiplexing may include an operation performed in relation to MUX UCI/Data. For example, UCI/data multiplexing may include a process of determining UL channel resources to transmit MUX UCI/Data.

-Slot: It means the basic time unit or time interval for data scheduling. The slot includes a plurality of symbols. Here, the symbol includes an OFDM-based symbol (eg, CP-OFDM symbol, DFT-s-OFDM symbol).

-Superimposed UL channel resource(s): means (at least partially) overlapped UL channel (eg, PUCCH, PUSCH) resource(s) on the time axis within a predetermined time interval (eg, slot). The overlapped UL channel resource(s) may mean UL channel resource(s) before performing UCI multiplexing. In this specification, UL channels (at least partially) overlapping each other on the time axis may be referred to as UL channels colliding in time or in the time domain.

9 shows an example of multiplexing UCI to PUSCH. When PUCCH resource(s) and PUSCH resources overlap in the slot, and simultaneous PUCCH-PUSCH transmission is not configured, UCI may be transmitted through PUSCH as shown. Transmitting UCI through PUSCH is referred to as UCI piggyback or PUSCH piggyback. In particular, FIG. 9 illustrates a case where HARQ-ACK and CSI are carried on PUSCH resources.

When a plurality of UL channels overlap within a predetermined time interval, in order for the BS to properly receive the UL channel(s) transmitted by the UE, a method for the UE to process the plurality of UL channels must be defined. . Hereinafter, methods of handling collisions between UL channels are described.

10 shows an example of a process in which a UE having PUCCHs overlapping in a single slot handles collision between UL channels.

For UCI transmission, the UE may determine a PUCCH resource for each UCI. Each PUCCH resource may be defined by a start symbol and a transmission length. When PUCCH resources for PUCCH transmissions overlap in a single slot, the UE may perform UCI multiplexing based on the PUCCH resource having the fastest start symbol. For example, the UE may determine the PUCCH resource(s) (hereinafter, PUCCH resource(s) B) overlapping (in time) based on the PUCCH resource (hereinafter, PUCCH resource A) with the fastest start symbol in the slot. Yes (S901). The UE may apply a UCI multiplexing rule to the PUCCH resource A and the PUCCH resource (s) B. For example, based on the UCI A of the PUCCH resource A and the UCI B of the PUCCH resource(s) B, a MUX UCI including all or part of the UCI A and the UCI B is obtained according to a UCI multiplexing rule. I can. The UE may determine a single PUCCH resource (hereinafter, MUX PUCCH resource) in order to multiplex the UCI associated with the PUCCH resource A and the PUCCH resource (s) B (S903). For example, the UE determines a PUCCH resource set (hereinafter, PUCCH resource set X) corresponding to the payload size of the MUX UCI among PUCCH resource sets configured or available to the UE, and the PUCCH resource set X One of the belonging PUCCH resources is determined as the MUX PUCCH resource. For example, the UE belongs to the PUCCH resource set X by using the PUCCH resource indicator field in the last DCI among DCIs having the PDSCH-to-HARQ_feedback timing indicator field indicating the same slot for the PUCCH transmission. One of the PUCCH resources may be determined as the MUX PUCCH resource. The UE may determine the total number of PRBs of the MUX PUCCH resources based on the payload size of the MUX UCI and the maximum code rate for the PUCCH format of the MUX PUCCH resource. If the MUX PUCCH resource overlaps with other PUCCH resources (except for the PUCCH resource A and the PUCCH resource(s) B), the UE is the MUX PUCCH resource (or among the remaining PUCCH resources including the MUX PUCCH resource) The operation described above may be performed again based on the PUCCH resource having the fastest start symbol).

11 illustrates cases of UCI multiplexing according to FIG. 9. Referring to FIG. 11, when a plurality of PUCCH resources overlap in a slot, UCI multiplexing may be performed based on the fastest PUCCH resource A (eg, the fastest start symbol). In FIG. 11, Case 1 and Case 2 illustrate a case where a first PUCCH resource overlaps another PUCCH resource. In this case, the process of FIG. 9 may be performed while the first PUCCH resource is regarded as the fastest PUCCH resource A. On the other hand, Case 3 illustrates a case where the first PUCCH resource does not overlap with other PUCCH resources, and the second PUCCH resource overlaps with other PUCCH resources. In case 3, UCI multiplexing is not performed on the first PUCCH resource. Instead, the process of FIG. 9 may be performed while the second PUCCH resource is regarded as the fastest PUCCH resource A. Case 2 is a case where the MUX PUCCH resource determined to transmit the multiplexed UCI overlaps with other PUCCH resources. In this case, the process of FIG. 9 may be additionally performed while the MUX PUCCH resource (or the fastest (eg, the fastest starting symbol) PUCCH resource among the remaining PUCCHs including the same) is considered as the fastest PUCCH resource A. .

12 illustrates a process in which a UE having PUCCH and PUSCH overlapping in a single slot handles collision between UL channels.

For UCI transmission, the UE may determine a PUCCH resource (S1101). Determining the PUCCH resource for UCI may include determining the MUX PUCCH resource. In other words, determining the PUCCH resource for UCI by the UE may include determining the MUX PUCCH resource based on a plurality of PUCCHs overlapping in the slot.

The UE may perform UCI piggyback on PUSCH resources based on the determined (MUX) PUCCH resource (S1103). For example, when there is a PUSCH resource (where multiplexed UCI transmission is allowed), the UE may apply a UCI multiplexing rule to PUCCH resource(s) overlapping the PUSCH resource (in the time axis). The UE may transmit UCI through PUSCH.

If the PUSCH overlapping the determined PUCCH resource is not in the slot, S1103 is omitted, and UCI may be transmitted through the PUCCH.

Meanwhile, when the determined PUCCH resource overlaps a plurality of PUSCHs on a time axis, the UE may multiplex UCI on one of the plurality of PUSCHs. For example, when the UE intends to transmit the plurality of PUSCHs on each (respective) serving cells, the UE may select a specific serving cell (eg, a serving cell having the smallest serving cell index) among the serving cells. UCI can be multiplexed on the PUSCH. When there are more than one PUSCH in the slot on the specific serving cell, the UE may multiplex the UCI on the fastest PUSCH transmitted in the slot.

13 illustrates UCI multiplexing in consideration of a timeline condition. When the UE performs UCI and/or data multiplexing for PUCCH(s) and/or PUSCH(s) overlapping on the time axis, for UCI and/or data multiplexing due to flexible UL timing settings for PUCCH or PUSCH The UE may run out of processing time. In order to prevent the UE from running out of processing time, in the UCI/data multiplexing process for overlapping PUCCH(s) and/or PUSCH(s) (on the time axis), the following two timeline conditions (hereinafter, multiplexing time Line conditions) are considered.

(1) The last symbol of the PDSCH corresponding to the HARQ-ACK information is received before N1+ time from the start symbol of the fastest channel among the overlapping PUCCH(s) and/or PUSCH(s) (on the time axis). T1 may be determined based on i) the minimum PDSCH processing time N1 defined according to the UE processing capability, ii) d1 predefined as an integer value greater than or equal to 0 depending on the position of the scheduled symbol, the DMRS position in the PUSCH, and BWP switching. have.

For example, T1 can be determined as follows: T1 = (N1 + d1)*(2048+144)*κ*2-u*Tc. N1 is based on u in Tables 10 and 11, respectively, for UE processing capabilities #1 and #2, where μ is the one that results in the largest T1 among (μPDCCH, μPDSCH, μUL), where μPDCCH schedules the PDSCH. Corresponds to the subcarrier spacing of the PDCCH, μPDSCH corresponds to the subcarrier spacing of the scheduled PDSCH, μUL corresponds to the subcarrier spacing of the UL channel to which HARQ-ACK is to be transmitted, and κ = Tc/Tf = 64. In the case of N1,0 in Table 10, if the PDSCH DMRS position l1 of the additional DMRS is 12, then N1,0=14, otherwise, N1,0=13 (see section 7.4.1.1.2 of 3GPP TS 38.211). For PDSCH mapping type A, if the last symbol of the PDSCH is on the i-th slot of the slot, d1=7-i for i<7, otherwise d1=0. For UE processing capability #1, if the PDSCH is mapping type B, if the number of allocated PDSCH symbols is 7, d1=0, if the number of allocated PDSCH symbols is 4, d1=3, and allocated PDSCH If the number of symbols is 2, d1=3+d, where d is the number of overlapping symbols between the scheduling PDCCH and the scheduled PDSCH. For UE processing capability #2, if the PDSCH is mapping type B, if the number of allocated PDSCH symbols is 7, d1=0, and if the number of allocated PDSCH symbols is 4, d1 is the scheduling PDCCH and the scheduled PDSCH. May be the number of overlapping symbols, and if the number of allocated PDSCH symbols is 2, if the scheduling PDSCH is in the 3-symbol CORESET and the CORESET and the PDSCH have the same start symbol, d1 = 3; otherwise, d1 is the It may be the number of overlapping symbols of the scheduled PDCCH and the scheduled PDSCH. In this specification, T1 may be expressed as T_proc,1.

(2) The last symbol of (e.g., triggering) PDCCH indicating PUCCH or PUSCH transmission is T2 time before the start symbol of the fastest channel among overlapping PUCCH(s) and/or PUSCH(s) (in the time axis) Is received. T2 may be determined based on i) the minimum PUSCH preparation time N2 defined according to the UE PUSCH timing capability, ii) d2, which is predefined as an integer value greater than or equal to 0 according to the position of the scheduled symbol or BWP switching. . d2 can be divided into d2,1 related to the position of the scheduled symbol and d2,2 related to the switching of the BWP.

For example, T2 can be determined as follows: T2 = max{(N2 + d2,1)*(2048+144)*κ*2-u*Tc, d2,2}. N2 is based on u in Tables 12 and 13 for UE timing capabilities #1 and #2, respectively, where μ is the one that results in the largest T2 among (μDL, μUL), where μDL is the DCI scheduling the PUSCH Corresponds to the subcarrier spacing of the PDCCH carrying the, μUL corresponds to the subcarrier spacing of the PUSCH, κ = Tc/Tf = 64. If the first symbol of PUSCH allocation is composed of only DM-RS, d2,1 = 0, otherwise, d2,1 = 1. If the scheduling DCI triggered a switch of BWP, then d2,2 is equal to the switching time, otherwise d2,2=0. The switching time may be differently defined according to the frequency range. For example, the switching time may be set to be 0.5 ms for the frequency range FR1 and 0.25 ms for the frequency range FR2. In this specification, T2 may be expressed as T_proc,2.

The following tables illustrate processing time according to UE processing capability. In particular, Table 10 illustrates the PDSCH processing time for the PDSCH processing capability #1 of the UE, Table 11 illustrates the PDSCH processing time for the PDSCH processing capability #2 of the UE, and Table 12 is the PUSCH timing capability of the UE #1 To illustrate the PUSCH preparation time for, and Table 13 illustrates the PUSCH preparation time for the timing capability #2 of the UE.

u/SCS	PDSCH decoding time N1 [symbols]
	Front-loaded DMRS only	Front-loaded + additional DMRS
0 / 15kHz	8	N 1,0
1 / 30kHz	10	13
2 / 60kHz	17	20
3 / 120kHz	20	24

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

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

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

When a UE configured to multiplex different UCI types within one PUCCH intends to transmit a plurality of overlapping PUCCHs in a slot or to transmit overlapping PUCCH(s) and PUSCH(s) in a slot, the UE has specific conditions If satisfied, the corresponding UCI types can be multiplexed. The specific conditions may include multiplexing timeline condition(s). For example, in FIGS. 9 to 12, PUCCH(s) and PUSCH(s) to which UCI multiplexing is applied may be UL channels satisfying the multiplexing timeline condition(s). Referring to FIG. 13, the UE may have to transmit a plurality of UL channels (eg, UL channels #1 to #4) in the same slot. Here, UL CH #1 may be a PUSCH scheduled by PDCCH #1. In addition, UL CH #2 may be a PUCCH for transmitting HARQ-ACK for PDSCH. PDSCH is scheduled by PDCCH #2, and resources of UL CH #2 may also be indicated by PDCCH #2.

At this time, when the UL channels overlapping on the time axis (eg, UL channels #1 to #3) satisfy the multiplexing timeline condition, the UE performs UCI multiplexing on the UL channels #1 to #3 overlapping on the time axis. can do. For example, the UE may check whether the first symbol of UL CH #3 satisfies the T1 condition from the last symbol of the PDSCH. In addition, the UE may check whether the first symbol of UL CH #3 from the last symbol of PDCCH #1 satisfies the T2 condition. If the multiplexing timeline condition is satisfied, the UE may perform UCI multiplexing on UL channels #1 to #3. On the other hand, when the fastest UL channel (eg, the UL channel with the fastest start symbol) among the overlapping UL channels does not satisfy the multiplexing timeline condition, multiplexing all corresponding UCI types of the UE may not be allowed.

14 illustrates transmission of a plurality of HARQ-ACK PUCCHs in a slot.

The current NR standard document (eg, 3GPP TS 38.213 V15.2.0) stipulates that the UE does not expect to transmit more than one PUCCH with HARQ-ACK information in a slot. Therefore, according to the current NR standard document, the UE can transmit at most one PUCCH having HARQ-ACK information in one slot. To prevent a situation in which the UE cannot send HARQ-ACK information due to the limitation of the number of HARQ-ACK PUCCHs that can be transmitted by the UE, BS schedules downlink so that HARQ-ACK information can be multiplexed on one PUCCH resource. Should be done. However, when considering a service with strict latency and reliability requirements, such as URLLC service, a scheme in which a plurality of HARQ-ACK feedbacks are concentrated only on one PUCCH in a slot is in terms of PUCCH performance. It may not be desirable. In addition, in order to support a latency-critical service, it may be required that the BS schedules a plurality of consecutive PDSCHs having a short duration within one slot. Even though the UE can transmit the PUCCH in any symbol(s) in the slot by the setting/instruction of the BS, if only one HARQ-ACK PUCCH transmission is allowed in the slot, the BS quickly back-to the PDSCHs. It is inevitable that scheduling with -back and the UE can quickly perform HARQ-ACK feedback. Therefore, for more flexible and efficient resource use and service support, it is preferable to allow a plurality of HARQ-ACK PUCCHs (or PUSCHs) to be transmitted in one slot as illustrated in FIG. 14.

In various examples of the present disclosure, when the UE receives the first PDSCH in slot i and transmits the HARQ-ACK for it in slot j, the HARQ-ACK for the second PDSCH received after the first PDSCH is transmitted before slot j. Can be transmitted. In this case, HARQ-ACK for the second PDSCH transmitted before slot j may be referred to as out-of-order HARQ-ACK transmission. In addition, this situation may be referred to as a non-sequential HARQ-ACK situation. In addition, the HARQ-ACK for the first PDSCH may be referred to as a first HARQ-ACK, and the HARQ-ACK for the second PDSCH may be referred to as a second HARQ-ACK.

In addition, for any two HARQ process IDs given to the scheduled cell, if the UE receives the first PDSCH from symbol j or the first PUSCH transmission is scheduled based on the PDCCH received up to symbol i, it is received after symbol i On the basis of one PDCCH, the reception of the second PDSCH or transmission of the second PUSCH may be scheduled before symbol j. In this case, the operation of scheduling the reception of the second PDSCH or transmission of the second PUSCH before symbol j may be referred to as an out-of-order PDSCH or PUSCH scheduling operation. In addition, this situation may be referred to as a non-sequential PDSCH/PUSCH scheduling situation.

Meanwhile, when the above-described out-of-order HARQ-ACK transmission or out-of-order PDSCH/PUSCH scheduling operation is not allowed, the UE may not expect a situation in which the HARQ-ACK transmission or out-of-order PDSCH/PUSCH scheduling operation occurs.

However, in the case of a UE with traffic of various requirements (e.g., eMBB UE / URLLC UE), a packet (e.g., codeword) scheduled later to satisfy more stringent latency requirements for a specific service (e.g., URLLC) The operation processed before the previously scheduled packet, that is, the above-described out-of-order PDSCH/PUSCH scheduling operation may need to be allowed. In addition, an operation in which HARQ-ACK for a later scheduled packet is transmitted before HARQ-ACK for a previously scheduled packet, that is, the aforementioned out-of-order HARQ-ACK transmission may need to be allowed.

15 is a flowchart illustrating a non-sequential situation according to an example of the present disclosure, and FIG. 16 is a flowchart illustrating a non-sequential situation according to another example of the present disclosure.

In FIGS. 15 and 16, channel 2 may be a channel that causes out-of-order HARQ-ACK transmission among channels mentioned in the present disclosure. In this case, channel 2 may be a channel in which HARQ-ACK timing is set or signaled so that HARQ-ACK is transmitted/received prior to HARQ-ACK for channel 1 received/transmitted prior to channel 2. Alternatively, the channel 2 may be a channel in which transmission/reception timing is set or signaled so as to transmit/receive prior to channel 1 scheduled before channel 2. Exemplarily, the channel 1 and/or the channel 2 may be a PDSCH or a PUSCH. In addition, hereinafter, channel 1 and channel 2 associated with an out-of-order HARQ-ACK situation/out-of-order scheduling situation may be referred to as two PDSCHs or two PUSCHs associated with an out-of-order situation. Hereinafter, for convenience of description, a non-sequential HARQ-ACK situation is mainly described as an example that occurs between two PDSCHs or between two PUSCHs, but non-sequential HARQ between more than two PDSCHs or between more than two PUSCHs Even when the -ACK situation occurs, various examples of the present disclosure may be applied.

Alternatively, the channel 2 is a higher priority target service (target service) and / or QoS (quality of service) and / or BLER requirements (block error ratio requirement) and / or transmission among the channels mentioned in the present disclosure It may be a PDSCH or PUSCH corresponding to a reliability requirement and/or a latency requirement and/or a processing time. In this case, channel 1 is a target service of lower priority and/or QoS and/or BLER requirement and/or transmission reliability requirement and/or latency requirement and/or processing time among the channels mentioned in this disclosure. It may be a corresponding” PDSCH or PUSCH. Hereinafter, the above-described target service and/or QoS and/or BLER requirements and/or transmission reliability requirements and/or latency requirements and/or processing time may be collectively referred to as channel-related elements.

Meanwhile, in the present disclosure, a channel-related element for a specific channel/UCI is set through a higher layer signal, explicitly indicated through a specific field of DCI, or a search space in which the PDCCH scheduling DL/UL data belongs. The PDCCH scheduling DL/UL data may be classified through, a CORESET to which a PDCCH for scheduling DL/UL data belongs, RNTI, DCI format, or PDCCH may be classified through CRC masking. Various examples of the present disclosure include a specific field of the DCI, a search space to which the PDCCH belongs, a CORESET to which the PDCCH belongs, an RNTI, a DCI format, and/or CRC masking of the PDCCH, without explicitly distinguishing a channel-related element for a channel/UCI. It can also be applied to the handling of the multi-type channel/UCI divided by. In addition, in the present disclosure, a channel/UCI corresponding to a specific channel-related element is a specific field of the DCI among a plurality of types of channels/UCIs, a search space to which the PDCCH belongs, a CORESET to which the PDCCH belongs, an RNTI, a DCI format, and/or a CRC of the PDCCH. It may be applied by being replaced with a specific channel/UCI divided by masking or the like.

Referring to FIG. 15, in S1201, resource collision may occur between non-sequential HARQ/scheduling or two channels (channel 1 and channel 2). Here, resource collision may mean that PDSCH/PUSCH resources having different HARQ IDs overlap on time and/or frequency.

In S1203, a predetermined condition related to out-of-order HARQ/scheduling or a resource collision occurrence situation between two channels may be satisfied. Meanwhile, in the present disclosure, each pre-determined condition related to a non-sequential HARQ-ACK/scheduling situation or a resource collision situation between two channels is predefined based on the 3GPP LTE/NR standard document, or set to the UE by the network or the base station. Can be.

In S1205, when a predetermined condition is satisfied, the UE may perform an operation related to channel 2 of the two channels. The operation related to the channel 2 may be the operation of the UE disclosed in Examples 1 to 7 below.

Referring to FIG. 16, under a specific predetermined condition in S1301, out-of-order HARQ/scheduling or resource collision may occur between two channels (channel 1 and channel 2).

In S1303, the UE may perform an operation related to channel 2 by giving priority to channel 2 instead of channel 1. The operation related to the channel 2 may be the operation of the UE disclosed in Examples 1 to 7 below. In this case, the operation related to the channel 1 may be dropped/terminated.

<Example 1>

When the out-of-order HARQ-ACK/scheduling occurs, an operation for out-of-order HARQ-ACK/scheduling may be determined differently based on a combination of the channel-related elements.

Specifically, as an example, when a non-sequential HARQ-ACK occurs due to a combination of channels having the same channel-related element, a rule is defined so that the UE does not expect such a situation or prioritizes processing for a later transmitted PDSCH. Can be. And/or a rule may be defined so that the UE drops/terminates processing of the PDSCH transmitted first. Meanwhile, as another example, when non-sequential HARQ-ACK occurs due to a combination of channels having different channel-related elements, a rule is defined so that the UE prioritizes processing of the PDSCH corresponding to the higher-priority channel-related element. Can be. And/or a rule may be defined so that the UE drops/terminates the processing of the PDSCH corresponding to the channel-related element of a lower priority.

In addition, as an example, when out-of-order scheduling occurs due to a combination of channels having the same channel-related element, a rule may be defined so that the UE does not expect such a situation or prioritizes processing of the PUSCH to be transmitted first. . And/or a rule may be defined so that the UE drops/terminates processing of the PUSCH to be transmitted later. On the other hand, as another example, on the other hand, when non-sequential scheduling occurs due to a combination of channels having different channel-related elements, a rule is defined so that the UE prioritizes processing of the PUSCH corresponding to the channel-related element of higher priority. I can. And/or a rule may be defined so that the UE drops/terminates processing of the PUSCH corresponding to the channel-related element of a lower priority.

<Example 2>

When the out-of-order HARQ-ACK situation occurs in a plurality of cells, the UE is capable of receiving/decoding processing for two PDSCHs (eg, channel 1 and channel 2) in each cell and HARQ-ACK feedback therefor. It reports as the UE capability and/or performs reception/decoding processing and HARQ-ACK feedback for the PDSCH according to the defined operation, and the base station considers/expects this operation and may determine scheduling. In Example 2, the UE capability for reception/decoding processing for two PDSCHs (e.g., channel 1 and channel 2) of the UE and HARQ-ACK feedback therefor is in any one of the two PDSCHs when a non-sequential HARQ-ACK situation occurs. Operation in which reception/decoding processing for both PDSCHs is not dropped/terminated, indicating that reception/decoding processing is possible and/or HARQ-ACK for PDSCH scheduled earlier is transmitted earlier than HARQ-ACK for PDSCH scheduled for later This may indicate that this is possible. In other words, the UE capability may indicate that a PDSCH reception/decoding operation associated with an out-of-order HARQ-ACK response is possible.

Meanwhile, the occurrence of the out-of-order HARQ-ACK situation in a plurality of cells may be occurrence of an out-of-order HARQ-ACK situation in at least one serving cell among the plurality of cells. In addition, in the sequential HARQ-ACK situation, the HARQ-ACK response for the PDSCH (eg, the first PDSCH) located earlier on the time domain overlaps with the HARQ-ACK response for the PDSCH (eg, the second PDSCH) located later on the time domain. It may be a situation that is transmitted or transmitted later. In the present disclosure, for convenience of description, in a non-sequential HARQ-ACK situation, a first HARQ-ACK response associated with a PDSCH transmitted earlier in time (eg, a first PDSCH) and a PDSCH transmitted later in time (eg, The second HARQ-ACK response among the second HARQ-ACK responses associated with the second PDSCH) is referred to as a non-sequential HARQ-ACK response.

<Example 2-1>

According to an example of the present disclosure, an element related to the CA capability of the UE, as an example, the number of cells that can be supported is N (eg, the number of serving cells that can be set for the UE is at most N), and the N When the number of cells not configured as a SCell by RRC among the cells, the number of deactivated cells, or the number of cells not overlapping with scheduling is N_rem, non-sequential HARQ in a serving cell of N_rem or less among N-N_rem cells -If an ACK situation occurs, the UE performs reception/decoding processing for two PDSCHs in the serving cell in which the out-of-order HARQ-ACK situation occurs, and then at each HARQ-ACK transmission timing, the indicated PUCCH resource (or after multiplexing). HARQ-ACK can be transmitted on the determined PUCCH/PUSCH resource).

On the other hand, when a non-sequential HARQ-ACK situation occurs in a number of serving cells greater than N_rem among N-N_rem cells, the UE may not expect such a situation.

Alternatively, the UE may drop/terminate the processing for the PDSCH transmitted first in all serving cells or the PDSCH corresponding to the channel-related element of a lower priority, and the HARQ-ACK for the corresponding PDSCH is invalid ) It is assumed as HARQ-ACK and can be reported as NACK. Meanwhile, the HARQ-ACK for the PDSCH for the later transmitted PDSCH or for the PDSCH corresponding to the channel-related element of higher priority is in the indicated PUCCH resource (or PUCCH/PUSCH resource determined after multiplexing) at the corresponding HARQ-ACK transmission timing. Can be transmitted.

Alternatively, the UE performs reception/decoding processing for two PDSCHs in the corresponding serving cell in N_rem (or X previously defined/configured/instructed) serving cells, and then at each HARQ-ACK transmission timing, indicated HARQ-ACK can be transmitted on PUCCH resources (or PUCCH/PUSCH resources determined after multiplexing). Meanwhile, in the remaining serving cells in which an out-of-order HARQ-ACK situation has occurred, except for N_rem (or previously defined/configured/instructed X) serving cells, the UE is a channel with a lower priority or for the PDSCH transmitted earlier. Processing for the PDSCH corresponding to the related element may be dropped/terminated, and HARQ-ACK for the corresponding PDSCH may be assumed to be invalid HARQ-ACK and reported as NACK. Meanwhile, the HARQ-ACK for the PDSCH for the later transmitted PDSCH or for the PDSCH corresponding to the channel-related element of higher priority is in the indicated PUCCH resource (or PUCCH/PUSCH resource determined after multiplexing) at the corresponding HARQ-ACK transmission timing. Can be transmitted. At this time, in order to determine a serving cell to transmit each HARQ-ACK after performing reception/decoding processing for both PDSCHs among serving cells in which an out-of-order HARQ-ACK situation occurs, the following conditions are (all or part) Priority may be determined in consideration.

-The channel-related element of the later transmitted PDSCH that causes out-of-order HARQ-ACK is first selected from a higher priority (for example, there are serving cells in which an out-of-order HARQ-ACK situation occurs, and out of sequence HARQ in each of the corresponding serving cells) -When PDSCHs causing an ACK situation are transmitted, the PDSCH having a high channel-related element is selected first from the serving cell)

-The channel-related element of the transmitted PDSCH is first selected from the highest priority (e.g., a serving cell in which a PDSCH having a higher channel-related element among the PDSCHs transmitted before the PDSCH causing a non-sequential HARQ-ACK situation is transmitted Select first)

-Priority selection from a serving cell with a short time gap between HARQ-ACK transmitted later in HARQ-ACK transmitted first

-Serving cell index (e.g., low index to high index)

-Band index (eg, low index to high index)

-Priority selection from the serving cell set by the base station through a higher layer signal and/or indicated through a physical layer signal

<Example 2-2>

According to an example of the present disclosure, when the out-of-order HARQ-ACK situation occurs in a BWP within a cell, the UE may report whether reception/decoding processing for two PDSCHs is possible to the base station as UE capability.

As an example, in the case of a UE reporting that reception/decoding processing for two PDSCHs is possible when the out-of-order HARQ-ACK situation occurs, the UE receives/decodes two PDSCHs in a cell in which an out-of-order HARQ-ACK situation occurs. After performing processing, at each HARQ-ACK transmission timing, HARQ-ACK may be transmitted to the indicated PUCCH resource (or PUCCH/PUSCH resource determined after multiplexing).

On the other hand, when the out-of-order HARQ-ACK situation occurs, in the case of a UE reporting that reception/decoding processing for two PDSCHs is impossible, it may not be expected that an out-of-order HARQ-ACK situation occurs for all cells.

Alternatively, when an out-of-order HARQ-ACK situation occurs in any one cell, the UE is a PDSCH corresponding to a PDSCH transmitted first in all serving cells in which an out-of-order HARQ-ACK situation occurs or a channel-related element of a lower priority. The processing for can be dropped/terminated, and HARQ-ACK for the corresponding PDSCH may be assumed to be an invalid HARQ-ACK and reported as NACK. Meanwhile, the HARQ-ACK for the PDSCH for the PDSCH transmitted later or for the PDSCH corresponding to the channel-related element of higher priority is in the indicated PUCCH resource (or PUCCH/PUSCH resource determined after multiplexing) at the corresponding HARQ-ACK transmission timing. Can be transmitted.

<Example 2-3>

According to an example of the present disclosure, when a non-sequential HARQ-ACK situation occurs, the UE capability report on whether reception/decoding processing for two PDSCHs is possible is a serving cell and/or cell group and/or BWP. Each may be reported separately and independently.

If a non-sequential HARQ-ACK situation occurs based on the UE capability report, if a non-sequential HARQ-ACK occurs in a serving cell reported that reception/decoding processing for two PDSCHs is possible, the UE At each HARQ-ACK transmission timing after reception/decoding processing for the PDSCH is performed, HARQ-ACK may be transmitted to the indicated PUCCH resource (or PUCCH/PUSCH resource determined after multiplexing).

On the other hand, when a non-sequential HARQ-ACK situation occurs, when a non-sequential HARQ-ACK occurs in a serving cell reported that reception/decoding processing for two PDSCHs is impossible, the UE may not expect such a situation. Alternatively, the UE drops/terminates the processing for the PDSCH transmitted first in the serving cell (reported that reception/decoding processing for both PDSCHs is not possible) or the PDSCH corresponding to a channel-related element of a lower priority. The HARQ-ACK for the corresponding PDSCH may be assumed to be an invalid HARQ-ACK and reported as NACK. Meanwhile, the HARQ-ACK for the PDSCH for the later transmitted PDSCH or for the PDSCH corresponding to the channel-related element of higher priority is in the indicated PUCCH resource (or PUCCH/PUSCH resource determined after multiplexing) at the corresponding HARQ-ACK transmission timing. Can be transmitted.

According to another example of the present disclosure, the UE capability report may be separately and independently reported for each band/band combination (per band/per band combination). In this case, when non-sequential HARQ-ACK occurs within the band/band combination reported as possible, the UE performs reception/decoding processing for two PDSCHs in all serving cells of the corresponding band/band combination, and then each HARQ At the -ACK transmission timing, HARQ-ACK may be transmitted on the indicated PUCCH resource (or PUCCH/PUSCH resource determined after multiplexing).

On the other hand, when an out of sequence HARQ-ACK occurs within the reported band/band combination as impossible, the UE may not expect such a situation. Alternatively, the UE may drop/terminate the processing for the PDSCH transmitted first in the serving cell in all serving cells of the corresponding band/band combination or for the PDSCH corresponding to a channel-related element of a lower priority, and to the corresponding PDSCH. The HARQ-ACK for is assumed to be invalid HARQ-ACK and may be reported as NACK. Meanwhile, the HARQ-ACK for the PDSCH for the later transmitted PDSCH or for the PDSCH corresponding to the channel-related element of higher priority is in the indicated PUCCH resource (or PUCCH/PUSCH resource determined after multiplexing) at the corresponding HARQ-ACK transmission timing. Can be transmitted.

<Example 2-4>

According to an example of the present disclosure, when the out-of-order HARQ-ACK situation occurs simultaneously in a plurality of serving cells, the UE determines the maximum number of serving cells capable of simultaneous reception/decoding processing for two PDSCHs in each serving cell as UE capability. Can report to the base station. Specifically, the UE capability may be independently reported on a per band/band combination basis, and in this case, various implementations of Example 2-4 may be independently applied for each band/band combination set to the UE. Hereinafter, when the out-of-order HARQ-ACK situation occurs simultaneously in a plurality of serving cells, the maximum number of serving cells in which the UE can simultaneously receive/decode two PDSCHs in each serving cell may be referred to as N_ooh. In other words, N_ooh does not drop/terminate any one of the two PDSCHs associated with the out of sequence HARQ-ACK when a non-sequential HARQ-ACK situation occurs in a plurality of serving cells, and two associated with the out of sequence HARQ-ACK situation. It may be the maximum number of serving cells in which PDSCH reception is allowed.

Meanwhile, in various examples of the present disclosure, the criterion for determining that the out-of-order HARQ-ACK situation occurs simultaneously in a plurality of serving cells may be determined by a case in which some (or all) of the following cases occur.

-When the HARQ-ACK interval transmitted first from the later transmitted PDSCH causing out of sequence HARQ-ACK overlaps in the time domain between serving cells or overlaps over a predetermined interval (e.g., non-sequential in a specific serving cell Non-sequential HARQ-ACK in a serving cell in a different time domain between PDSCH transmission causing a HARQ-ACK situation and transmission of a HARQ-ACK response for a PDSCH transmitted before the PDSCH causing the out-of-order HARQ-ACK situation When the time domain between the PDSCH transmission causing the situation and the HARQ-ACK response transmission for the PDSCH transmitted before the PDSCH causing the out of sequence HARQ-ACK situation overlaps with a certain region)

-When the HARQ-ACK interval transmitted first from the HARQ-ACK transmitted later overlaps in the time domain between serving cells or overlaps over a certain interval (e.g., time between non-sequential HARQ-ACK transmission in a specific serving cell In the case that the period on the domain overlaps a period on the time domain and a certain area between non-sequential HARQ-ACK transmissions in different serving cells)

-When the HARQ-ACK interval transmitted later from the PDSCH transmitted later overlaps in the time domain between serving cells or overlaps more than a certain interval (e.g., PDSCH causing a non-sequential HARQ-ACK situation in a specific serving cell PDSCH transmission and the out-of-order HARQ-ACK for causing a non-sequential HARQ-ACK situation in a serving cell in a time domain between transmission and transmission of a HARQ-ACK response for the PDSCH causing the out of sequence HARQ-ACK situation When the time domain between transmission of the HARQ-ACK response to the PDSCH causing the situation and a certain area or more overlap)

As a specific example of Example 2-4, when a non-sequential HARQ-ACK situation occurs in a serving cell of N_ooh or less among N-N_rem cells, the UE performs reception/decoding processing for two PDSCHs in the serving cell. Later, at each HARQ-ACK transmission timing, HARQ-ACK may be transmitted on the indicated PUCCH resource (or PUCCH/PUSCH resource determined after multiplexing).

On the other hand, when a non-sequential HARQ-ACK situation occurs in a larger number of serving cells than N_ooh, the UE may not expect such a situation. Alternatively, the UE may drop/terminate the processing for the PDSCH transmitted first in all serving cells or the PDSCH corresponding to a channel-related element of a lower priority, and HARQ-ACK for the corresponding PDSCH is invalid HARQ- It is assumed to be ACK and can be reported as NACK. That is, based on the fact that the number of serving cells in which the out-of-order HARQ-ACK situation occurs is greater than N_ooh, the UE drops/terminates the processing of the PDSCH transmitted first among the two PDSCHs associated with the out-of-order HARQ-ACK situation. Can be, and HARQ-ACK for the corresponding PDSCH may include only NACK.

On the other hand, HARQ-ACK for a PDSCH corresponding to a channel-related element of a higher priority or for a later transmitted PDSCH among the two PDSCHs associated with the out-of-order HARQ-ACK situation is the indicated PUCCH at the corresponding HARQ-ACK transmission timing. It may be transmitted on a resource (or a PUCCH/PUSCH resource determined after multiplexing).

In addition, the UE performs reception/decoding processing for two PDSCHs in the corresponding serving cell in N_ooh (or X number of predefined/configured/instructed) serving cells, and then at each HARQ-ACK transmission timing, indicated HARQ-ACK can be transmitted on PUCCH resources (or PUCCH/PUSCH resources determined after multiplexing).

In addition, for the remaining serving cells except for N_ooh (or previously defined/configured/instructed X) serving cells, the UE is for the PDSCH transmitted first or for the PDSCH corresponding to the channel-related element of lower priority. Processing can be dropped/terminated, and HARQ-ACK for the corresponding PDSCH is assumed to be invalid HARQ-ACK and can be reported as NACK. Meanwhile, the HARQ-ACK for the PDSCH for the later transmitted PDSCH or for the PDSCH corresponding to the channel-related element of higher priority is in the indicated PUCCH resource (or PUCCH/PUSCH resource determined after multiplexing) at the corresponding HARQ-ACK transmission timing. Can be transmitted. This is, among a plurality of serving cells in which a non-sequential HARQ-ACK situation occurs, for N_ooh serving cells capable of processing two PDSCHs based on UE capability, processing for two PDSCHs and HARQ-ACK for each are transmitted, but the rest For serving cells, drop/terminate processing of the PDSCH transmitted first among the two PDSCHs associated with the out-of-order HARQ-ACK situation, and a HARQ-ACK response to the PDSCH transmitted first among the two PDSCHs associated with the out-of-order HARQ-ACK situation. May mean to transmit including only NACK.

In this case, the priority for determining the N_ooh (or previously defined/set/instructed X) serving cells among the plurality of serving cells may be determined in consideration of the following conditions (all or part).

-The channel-related element of the later transmitted PDSCH that causes out-of-order HARQ-ACK is first selected from a higher priority (for example, there are serving cells in which an out-of-order HARQ-ACK situation occurs, and out of sequence HARQ in each of the corresponding serving cells) -When PDSCHs causing an ACK situation are transmitted, the PDSCH having a high channel-related element is selected first from the serving cell)

-The channel-related element of the transmitted PDSCH is first selected from the highest priority (e.g., a serving cell in which a PDSCH having a higher channel-related element among the PDSCHs transmitted before the PDSCH causing a non-sequential HARQ-ACK situation is transmitted Select first)

-Priority selection from a serving cell with a short time gap between HARQ-ACK transmitted later in HARQ-ACK transmitted first

-Serving cell index (e.g., lower index to higher index, that is, lower index takes precedence over higher index)

-Band index (e.g., lower index to higher index, that is, lower index takes precedence over higher index)

-Priority selection from the serving cell set by the base station through a higher layer signal and/or indicated through a physical layer signal

As another specific example of Example 2-4, a factor related to the CA capability of the UE, as an example, the number of cells that can be supported is N, the number of unconfigured cells or the number of deactivated cells or scheduling does not overlap. When the number of cells is N_rem, when a non-sequential HARQ-ACK situation occurs in a serving cell of N_ooh + N_rem (or N_ooh + N_rem + alpha, where alpha is an integer other than 0) among N-N_rem cells, The UE may transmit HARQ-ACK to the indicated PUCCH resource (or PUCCH/PUSCH resource determined after multiplexing) at each HARQ-ACK transmission timing after performing reception/decoding processing for two PDSCHs in the corresponding serving cell.

On the other hand, when a non-sequential HARQ-ACK situation occurs in a larger number of serving cells than N_ooh + N_rem (or N_ooh + N_rem + alpha) among N-N_rem cells, the UE may not expect such a situation. Alternatively, the UE may drop/terminate the processing for the PDSCH transmitted first in all serving cells or the PDSCH corresponding to a channel-related element of a lower priority, and HARQ-ACK for the corresponding PDSCH is invalid HARQ- It is assumed to be ACK and can be reported as NACK. In addition, the HARQ-ACK for the PDSCH for the later transmitted PDSCH or for the PDSCH corresponding to the channel-related element of higher priority is in the indicated PUCCH resource (or PUCCH/PUSCH resource determined after multiplexing) at the corresponding HARQ-ACK transmission timing. Can be transmitted.

In addition, the UE performs reception/decoding processing for two PDSCHs in the serving cell in N_ooh + N_rem (or N_ooh + N_rem + alpha or X previously defined/configured/instructed) serving cells and then each HARQ- At the ACK transmission timing, HARQ-ACK can be transmitted on the indicated PUCCH resource (or PUCCH/PUSCH resource determined after multiplexing).

On the other hand, for the remaining serving cells excluding N_ooh + N_rem (or N_ooh + N_rem + alpha or previously defined/configured/instructed X) serving cells, the UE is the first transmitted PDSCH or a lower priority channel Processing for the PDSCH corresponding to the related element may be dropped/terminated, and HARQ-ACK for the corresponding PDSCH may be assumed to be invalid HARQ-ACK and reported as NACK. In addition, the HARQ-ACK for the PDSCH for the later transmitted PDSCH or for the PDSCH corresponding to the channel-related element of higher priority is in the indicated PUCCH resource (or PUCCH/PUSCH resource determined after multiplexing) at the corresponding HARQ-ACK transmission timing. Can be transmitted. In this case, the priority for determining a serving cell to transmit each HARQ-ACK after receiving/decoding processing for the two PDSCHs may be determined in consideration of the following conditions (all or part).

-The channel-related element of the later transmitted PDSCH that causes out-of-order HARQ-ACK is first selected from a higher priority (for example, there are serving cells in which an out-of-order HARQ-ACK situation occurs, and out of sequence HARQ in each of the corresponding serving cells) -When PDSCHs causing an ACK situation are transmitted, the PDSCH having a high channel-related element is selected first from the serving cell)

-The channel-related element of the transmitted PDSCH is first selected from the highest priority (e.g., a serving cell in which a PDSCH having a higher channel-related element among the PDSCHs transmitted before the PDSCH causing a non-sequential HARQ-ACK situation is transmitted Select first)

-Priority selection from a serving cell with a short time gap between HARQ-ACK transmitted later in HARQ-ACK transmitted first

-Serving cell index (e.g., lower index to higher index, that is, lower index takes precedence over higher index)

-Band index (e.g., lower index to higher index, that is, lower index takes precedence over higher index)

-Priority selection from the serving cell set by the base station through a higher layer signal and/or indicated through a physical layer signal

In the above-described various examples of the present disclosure, the processing of the serving cells as much as N_rem or as much as N_rem + alpha is an element related to CA capability by utilizing the CA capability of the UE, as an example, when the number of supported cells is N Among the N serving cells, it may be possible to process two PDSCHs in more cells by borrowing processing power of an unconfigured or deactivated serving cell or a serving cell whose scheduling does not overlap.

<Example 3>

In a situation in which the resources of two PDSCH transmissions having different HARQ IDs scheduled by two PDCCHs in a specific cell BWP overlap on time and/or frequency, the UE receives/decoding processing for two PDSCHs and HARQ-ACK for it It is possible to report the capability for feedback and/or perform reception/decoding processing and HARQ-ACK feedback for the PDSCH according to a defined operation. In addition, the base station may consider/expect such an operation and determine the scheduling. Meanwhile, hereinafter, a situation in which resources of two PDSCH transmissions having different HARQ IDs scheduled by two PDCCHs scheduled by two PDCCHs in a specific cell overlap in time and/or frequency may be referred to as a resource collision situation between dynamic PDSCHs.

In Example 3, the UE capability for reception/decoding processing for two PDSCHs and HARQ-ACK feedback for the UE drops reception/decoding processing for one of the two PDSCHs when a resource conflict situation occurs between dynamic PDSCHs. It may indicate that reception/decoding processing is possible for both PDSCHs without termination, and/or it may indicate that an operation in which HARQ-ACK for a previously scheduled PDSCH is transmitted before HARQ-ACK for a later scheduled PDSCH is possible.

<Example 3-1>

According to an example of the present disclosure, a factor related to the CA capability of the UE, as an example, the number of supported cells is N, the number of cells that are not set or the number of deactivated cells or the number of cells whose scheduling does not overlap When is N_rem, when a resource collision situation occurs between dynamic PDSCHs in a serving cell of N_rem or less among N-N_rem cells, the UE performs reception/decoding processing for two PDSCHs in each serving cell, and then each HARQ At the -ACK transmission timing, HARQ-ACK may be transmitted on the indicated PUCCH resource (or PUCCH/PUSCH resource determined after multiplexing).

On the other hand, when a resource collision situation occurs between dynamic PDSCHs in a serving cell larger than N_rem among N-N_rem cells, the UE may not expect such a situation. Alternatively, the UE may skip/drop/terminate reception for a PDSCH scheduled by a PDCCH previously transmitted in all serving cells or a PDSCH corresponding to a channel-related element of a lower priority, and HARQ for the corresponding PDSCH -ACK is assumed to be invalid HARQ-ACK and can be reported as NACK. Meanwhile, the HARQ-ACK for the PDSCH scheduled by the later transmitted PDCCH or for the PDSCH corresponding to the channel-related element of higher priority is indicated at the corresponding HARQ-ACK transmission timing, and the indicated PUCCH resource (or PUCCH determined after multiplexing). /PUSCH resource).

Alternatively, the UE performs reception/decoding processing for two PDSCHs in the corresponding serving cell in N_rem (or previously defined/configured/instructed X) serving cells, and then at each HARQ-ACK transmission timing, indicated PUCCH HARQ-ACK may be transmitted on a resource (or a PUCCH/PUSCH resource determined after multiplexing). Meanwhile, in the remaining serving cells in which an out of sequence HARQ-ACK situation occurs, except for N_rem (or previously defined/configured/instructed X) serving cells, the UE has a lower or lower PDSCH scheduled by the previously transmitted PDCCH. Reception for the PDSCH corresponding to the channel-related element of the priority may be skipped/dropped/terminated, and the HARQ-ACK for the corresponding PDSCH may be assumed to be an invalid HARQ-ACK and reported as NACK. Meanwhile, the HARQ-ACK for the PDSCH scheduled by the later transmitted PDCCH or for the PDSCH corresponding to the channel-related element of higher priority is indicated at the corresponding HARQ-ACK transmission timing, and the indicated PUCCH resource (or PUCCH determined after multiplexing). /PUSCH resource). At this time, the priority for determining a serving cell to transmit each HARQ-ACK after receiving/decoding processing for two PDSCHs may be determined in consideration of (all or part of) the following conditions.

-The channel-related element of the PDSCH scheduled by the transmitted PDCCH is selected from the highest priority (for example, the PDSCH with the highest channel-related element of the PDSCH scheduled by the PDCCH transmitted before a specific PDCCH is transmitted. Selected preferentially from the serving cell)

-The channel-related element of the PDSCH scheduled by the later transmitted PDCCH is selected from the highest priority (for example, the PDSCH with the highest channel-related element of the PDSCH scheduled by the PDCCH transmitted later than a specific PDCCH is transmitted. Selected preferentially from the serving cell)

-Serving cell index (e.g., lower index to higher index, that is, lower index takes precedence over higher index)

-Band index (e.g., lower index to higher index, that is, lower index takes precedence over higher index)

-Priority selection from the serving cell set by the base station through a higher layer signal and/or indicated through a physical layer signal

<Example 3-2>

According to an example of the present disclosure, when a resource collision situation occurs between the dynamic PDSCHs in a BWP within a cell, the UE may report whether reception/decoding processing for two PDSCHs is possible as a UE capability.

As an example, in the case of a UE reporting that reception/decoding processing for two PDSCHs is possible when a resource collision situation occurs between the dynamic PDSCHs, reception/decoding of two PDSCHs in a cell in which a resource collision situation occurs between dynamic PDSCHs After performing processing, at each HARQ-ACK transmission timing, HARQ-ACK may be transmitted to the indicated PUCCH resource (or PUCCH/PUSCH resource determined after multiplexing).

On the other hand, when a resource conflict situation occurs between the dynamic PDSCHs, in the case of a UE reporting that reception/decoding processing for two PDSCHs is impossible, it may not be expected that a resource conflict situation occurs between dynamic PDSCHs for all cells. .

Alternatively, if a resource collision situation occurs between dynamic PDSCHs in any one cell, the UE is the UE of a lower priority or for the PDSCH scheduled by the PDCCH transmitted earlier in all serving cells in which the resource collision situation occurs between the dynamic PDSCHs. Reception for the PDSCH corresponding to the channel-related element can be skipped/dropped/terminated, and the HARQ-ACK for the corresponding PDSCH may be assumed to be an invalid HARQ-ACK and reported as NACK. Meanwhile, the HARQ-ACK for the PDSCH scheduled by the later transmitted PDCCH or for the PDSCH corresponding to the channel-related element of higher priority is indicated at the corresponding HARQ-ACK transmission timing, and the indicated PUCCH resource (or PUCCH determined after multiplexing). /PUSCH resource).

<Example 3-3>

According to an example of the present disclosure, when a resource conflict situation occurs between dynamic PDSCHs, the UE capability report on whether reception/decoding processing for two PDSCHs is possible is a serving cell and/or cell group and/or It may be reported separately and independently for each BWP.

If a resource collision situation occurs between dynamic PDSCHs based on the UE capability report, if a resource collision situation occurs between dynamic PDSCHs in a serving cell reported to be capable of receiving/decoding processing for two PDSCHs, within the corresponding serving cell At each HARQ-ACK transmission timing after receiving/decoding processing for two PDSCHs is performed, HARQ-ACK may be transmitted to the indicated PUCCH resource (or PUCCH/PUSCH resource determined after multiplexing).

On the other hand, when a resource conflict situation occurs between dynamic PDSCHs, when a resource conflict situation occurs between dynamic PDSCHs in a serving cell reported that reception/decoding processing for two PDSCHs is impossible, the UE does not expect such a situation. I can. Alternatively, the UE may skip/drop/terminate reception for a PDSCH scheduled by a PDCCH previously transmitted in a corresponding serving cell or a PDSCH corresponding to a channel-related element of a lower priority, and HARQ for the corresponding PDSCH -ACK is assumed to be invalid HARQ-ACK and can be reported as NACK. Meanwhile, the HARQ-ACK for the PDSCH scheduled by the later transmitted PDCCH or for the PDSCH corresponding to the channel-related element of higher priority is indicated at the corresponding HARQ-ACK transmission timing, and the indicated PUCCH resource (or PUCCH determined after multiplexing). /PUSCH resource).

According to another example of the present disclosure, the UE capability report may be separately and independently reported for each band/band combination (per band/per band combination). In this case, when a resource collision situation occurs between dynamic PDSCHs within the reported band/band combination, each HARQ after receiving/decoding processing for two PDSCHs in all serving cells of the corresponding band/band combination is performed. At the -ACK transmission timing, HARQ-ACK may be transmitted on the indicated PUCCH resource (or PUCCH/PUSCH resource determined after multiplexing).

On the other hand, when a resource collision situation occurs between dynamic PDSCHs within the reported impossible band/band combination, the UE may not expect such a situation. Alternatively, the UE skips/drops/terminates reception of the PDSCH scheduled by the PDCCH transmitted earlier in the serving cell in all serving cells of the corresponding band/band combination or the PDSCH corresponding to a channel-related element of a lower priority. The HARQ-ACK for the corresponding PDSCH may be assumed to be an invalid HARQ-ACK and reported as NACK. Meanwhile, the HARQ-ACK for the PDSCH scheduled by the later transmitted PDCCH or for the PDSCH corresponding to the channel-related element of higher priority is indicated at the corresponding HARQ-ACK transmission timing, and the indicated PUCCH resource (or PUCCH determined after multiplexing). /PUSCH resource).

<Example 3-4>

According to an example of the present disclosure, when a resource collision situation between the dynamic PDSCHs occurs simultaneously in a plurality of serving cells, the UE can determine the maximum number of serving cells capable of simultaneous reception/decoding processing for two PDSCHs in each serving cell. This can be reported to the base station. Specifically, the UE capability may be independently reported on a per band/band combination basis, and in this case, various implementations of Example 3-4 may be independently applied for each band/band combination set to the UE. Hereinafter, when a resource collision situation between the dynamic PDSCHs occurs simultaneously in a plurality of serving cells, the maximum number of serving cells in which the UE can simultaneously receive/decode two PDSCHs in each serving cell is referred to as N_c.

Meanwhile, a criterion for determining that a resource collision situation between the dynamic PDSCHs occurs simultaneously in a plurality of serving cells may be determined by a case in which some (or all) of the following cases occur.

-When the PDSCH interval corresponding to the PDCCH from a later transmitted PDCCH causing a resource collision situation between dynamic PDSCHs overlaps in the time domain between serving cells or overlaps over a certain period (e.g., in a specific serving cell A period in the time domain between the PDCCH transmission causing a resource collision situation and the PDSCH transmission corresponding to the PDCCH in a serving cell in which a period in the time domain between the PDCCH transmission causing a resource collision situation and the PDSCH transmission corresponding to the PDCCH is different Overlap with a certain area)

-When the time interval corresponding to the union of the resources of the two PDSCHs in each serving cell overlaps in the time domain between the serving cells or overlaps over a certain interval (e.g., in a resource conflict situation in a specific serving cell) Time between transmission of the PDSCH located earlier in the time domain and transmission of the PDSCH located later in the time domain among the two PDSCHs associated with a resource collision situation in a serving cell with a different time domain between transmission of the PDSCH located first in the time domain among the two associated PDSCHs If the domain on the domain overlaps a certain area or more)

-When the PDSCH scheduled by the later transmitted PDCCH of each serving cell overlaps in the time domain between serving cells or overlaps for a certain period or more (e.g., the time domain of two PDSCHs related to a resource conflict situation in a specific serving cell) If the PDSCH transmission interval located earlier in the phase overlaps a predetermined region with the PDSCH transmission interval located earlier in the time domain among two PDSCHs associated with a resource collision situation in another serving cell

As a specific example of Example 3-4, when a resource collision situation occurs between dynamic PDSCHs in a serving cell of N_c or less among N-N_rem cells, the UE performs reception/decoding processing for two PDSCHs in the serving cell. Then, at each HARQ-ACK transmission timing, HARQ-ACK may be transmitted on the indicated PUCCH resource (or PUCCH/PUSCH resource determined after multiplexing).

On the other hand, when a resource collision situation occurs between dynamic PDSCHs in a serving cell larger than N_c, the UE may not expect such a situation. Alternatively, the UE may skip/drop/terminate reception for a PDSCH scheduled by a PDCCH previously transmitted in all serving cells or a PDSCH corresponding to a channel-related element of a lower priority, and HARQ for the corresponding PDSCH -ACK is assumed to be invalid HARQ-ACK and can be reported as NACK. Meanwhile, the HARQ-ACK for the PDSCH scheduled by the later transmitted PDCCH or for the PDSCH corresponding to the channel-related element of higher priority is indicated at the corresponding HARQ-ACK transmission timing, and the indicated PUCCH resource (or PUCCH determined after multiplexing). /PUSCH resource).

In addition, the UE performs reception/decoding processing for two PDSCHs in the serving cell in N_c (or X number of previously defined/configured/instructed), and then at each HARQ-ACK transmission timing, indicated HARQ-ACK can be transmitted on PUCCH resources (or PUCCH/PUSCH resources determined after multiplexing).

In addition, for the remaining serving cells except for N_c (or X number of predefined/configured/instructed) serving cells, the UE is configured for the PDSCH scheduled by the previously transmitted PDCCH or a channel-related element of a lower priority. Reception for the corresponding PDSCH may be skipped/dropped/terminated, and HARQ-ACK for the corresponding PDSCH may be assumed to be an invalid HARQ-ACK and reported as NACK. Meanwhile, the HARQ-ACK for the PDSCH scheduled by the later transmitted PDCCH or for the PDSCH corresponding to the channel-related element of higher priority is indicated at the corresponding HARQ-ACK transmission timing, and the indicated PUCCH resource (or PUCCH determined after multiplexing). /PUSCH resource). At this time, the priority for determining N_c (or X previously defined/set/instructed) serving cells may be determined in consideration of (all or part of) the following conditions.

-The channel-related element of the PDSCH scheduled by the transmitted PDCCH is first selected from the highest priority (for example, a PDSCH with a high channel-related element of the PDSCH located later in the time domain among two PDSCHs related to a resource conflict situation is transmitted. Selected first from serving cell)

-The channel-related element of the PDSCH scheduled by the later transmitted PDCCH is selected from the highest priority (for example, a PDSCH with a high channel-related element of the PDSCH located earlier in the time domain among two PDSCHs related to a resource conflict situation is transmitted Selected first from serving cell)

-Serving cell index (e.g., lower index to higher index, that is, lower index takes precedence over higher index)

-Band index (e.g., lower index to higher index, that is, lower index takes precedence over higher index)

-Priority selection from the serving cell set by the base station through a higher layer signal and/or indicated through a physical layer signal

As another specific example of Example 3-4, a factor related to the CA capability of the UE, as an example, the number of cells that can be supported is N, the number of unconfigured cells or the number of deactivated cells or scheduling does not overlap. When the number of cells is N_rem, when a resource conflict situation occurs between dynamic PDSCHs in a serving cell of N_c + N_rem (or N_c + N_rem + alpha, where alpha is an integer other than 0) among N-N_rem cells , The UE may transmit HARQ-ACK to the indicated PUCCH resource (or PUCCH/PUSCH resource determined after multiplexing) at each HARQ-ACK transmission timing after performing reception/decoding processing for two PDSCHs in the corresponding serving cell. .

On the other hand, when a resource collision situation occurs between dynamic PDSCHs in a serving cell that is greater than N_c + N_rem (or N_c + N_rem + alpha) among N-N_rem cells, the UE may not expect such a situation. Alternatively, the UE may skip/drop/terminate reception for a PDSCH scheduled by a PDCCH previously transmitted in all serving cells or a PDSCH corresponding to a channel-related element of a lower priority, and HARQ for the corresponding PDSCH -ACK is assumed to be invalid HARQ-ACK and can be reported as NACK. Meanwhile, the HARQ-ACK for the PDSCH scheduled by the later transmitted PDCCH or for the PDSCH corresponding to the channel-related element of higher priority is indicated at the corresponding HARQ-ACK transmission timing, and the indicated PUCCH resource (or PUCCH determined after multiplexing). /PUSCH resource).

In addition, in the serving cell of N_c + N_rem (or N_c + N_rem + alpha or previously defined/set/instructed X), the UE performs reception/decoding processing for two PDSCHs in the corresponding serving cell, and then each HARQ- At the ACK transmission timing, HARQ-ACK can be transmitted on the indicated PUCCH resource (or PUCCH/PUSCH resource determined after multiplexing).

On the other hand, for the remaining serving cells except for N_c+N_rem (or N_c+N_rem+alpha or X defined/configured/instructed in advance) serving cells, the UE is more than or equal to the PDSCH scheduled by the PDCCH transmitted earlier. Reception for a PDSCH corresponding to a channel-related element of a lower priority may be skipped/dropped/terminated, and HARQ-ACK for the corresponding PDSCH may be assumed to be an invalid HARQ-ACK and reported as NACK. In addition, the HARQ-ACK for the PDSCH scheduled by the later transmitted PDCCH or for the PDSCH corresponding to the channel-related element of higher priority is indicated at the corresponding HARQ-ACK transmission timing, and the indicated PUCCH resource (or PUCCH determined after multiplexing). /PUSCH resource). In this case, the priority for determining a serving cell to transmit each HARQ-ACK after performing reception/decoding processing for the two PDSCHs may be determined in consideration of (all or part of) the following conditions.

-The channel-related element of the PDSCH scheduled by the transmitted PDCCH is first selected from the highest priority (for example, a PDSCH with a high channel-related element of the PDSCH located later in the time domain among two PDSCHs related to a resource conflict situation is transmitted. Selected first from serving cell)

-The channel-related element of the PDSCH scheduled by the later transmitted PDCCH is selected from the highest priority (for example, a PDSCH with a high channel-related element of the PDSCH located earlier in the time domain among two PDSCHs related to a resource conflict situation is transmitted Selected first from serving cell)

-Serving cell index (e.g., lower index to higher index, that is, lower index takes precedence over higher index)

-Band index (e.g., lower index to higher index, that is, lower index takes precedence over higher index)

-Priority selection from the serving cell set by the base station through a higher layer signal and/or indicated through a physical layer signal

In the above-described various examples of the present disclosure, the processing of the serving cells as much as N_rem or as much as N_rem + alpha is an element related to CA capability by utilizing the CA capability of the UE, as an example, when the number of supported cells is N Among the N serving cells, it may be possible to perform two PDSCH processing in more cells by borrowing processing power of an unconfigured or deactivated serving cell or a serving cell whose scheduling does not overlap.

<Example 4>

When the out-of-order PUSCH scheduling situation occurs in some (or all) cells among a plurality of cells, the UE reports the capability for transmission/encoding processing for two PUSCHs in each cell and/or for a defined operation. Accordingly, transmission/encoding processing for PUSCH can be performed. The base station considers/expects this operation and can receive the PUSCH and make a scheduling decision. On the other hand, Example 4 is a situation in which two PUSCH transmission resources having different HARQ IDs scheduled by two PDCCHs scheduled by two PDCCHs in a BWP within a specific cell, in addition to non-sequential PUSCH scheduling, overlap on time and/or frequency (e.g., between dynamic PUSCHs Resource conflicts).

In Example 4, the UE capability for transmission/encoding processing for two PUSCHs of the UE is transmitted/encoded for both PUSCHs without dropping/ending the transmission/encoding processing for one of the two PUSCHs when an out of sequence PUSCH scheduling situation occurs. It may indicate that processing is possible.

<Example 4-1>

According to an example of the present disclosure, a factor related to the CA capability of the UE, as an example, the number of supported cells is N, the number of cells that are not set or the number of deactivated cells or the number of cells whose scheduling does not overlap When is N_rem, when a non-sequential PUSCH scheduling situation occurs in a serving cell less than N_rem among N-N_rem cells, the UE transmits two PUSCHs after performing transmission/encoding processing for two PUSCHs in each serving cell. I can.

On the other hand, when an out-of-order PUSCH scheduling situation occurs in serving cells larger than N_rem among N-N_rem cells, the UE may not expect such a situation.

Alternatively, the UE may drop/terminate the processing of the PUSCH scheduled by the UL grant DCI/PDCCH transmitted first in all serving cells or the PUSCH corresponding to a channel-related element of a lower priority. Meanwhile, a rule may be defined so that the UE transmits only the PUSCH scheduled by the UL grant DCI/PDCCH transmitted later or the PUSCH corresponding to the channel-related element of higher priority.

Alternatively, the UE may perform transmission/encoding processing for two PUSCHs in the corresponding serving cell in N_rem (or X previously defined/configured/instructed) serving cells, and then transmit the two PUSCHs, respectively. Meanwhile, in the remaining serving cells in which an out-of-order PUSCH scheduling situation occurs, except for N_rem (or previously defined/configured/instructed X) serving cells, the UE for the PUSCH scheduled by the UL grant DCI/PDCCH transmitted earlier Alternatively, processing for a PUSCH corresponding to a channel-related element of a lower priority may be dropped/terminated. Meanwhile, a rule may be defined so that the UE transmits only the PUSCH scheduled by the UL grant DCI/PDCCH transmitted later or the PUSCH corresponding to the channel-related element of higher priority. At this time, after performing transmission/encoding processing for two PUSCHs, the priority for determining a serving cell to transmit each of the two PUSCHs may be determined in consideration of (all or part of) the following conditions.

-Channel-related elements of the later transmitted UL grant DCI/PDCCH (or the previously transmitted PUSCH scheduled by this) that cause out-of-order PUSCH scheduling are first selected from a higher priority (e.g., out of sequence PUSCH scheduling is a situation) When the UL grant DCI/PDCCH causing out-of-order PUSCH scheduling is transmitted in each of the generated serving cells, the UL grant DCI/PDCCH having a high channel-related element is preferentially selected from the serving cell transmitted)

-The channel-related element of the PUSCH transmitted later is preferentially selected from the high priority (e.g., from the serving cell in which the PUSCH having a high channel-related element among the PUSCHs transmitted later among the two PUSCHs related to the non-sequential PUSCH scheduling situation is transmitted Preferentially)

-Priority selection from a serving cell with a short time gap between the UL grant DCI/PDCCH transmitted first and the PUSCH transmitted later

-The start symbol of the PUSCH transmitted first in each cell is preferentially selected from the earliest order

-Serving cell index (e.g., lower index to higher index, that is, lower index takes precedence over higher index)

-Band index (e.g., lower index to higher index, that is, lower index takes precedence over higher index)

-Priority selection from the serving cell set by the base station through a higher layer signal and/or indicated through a physical layer signal

<Example 4-2>

According to an example of the present disclosure, when the out-of-order PUSCH scheduling situation occurs in a BWP within a cell, the UE may report whether transmission/encoding processing for two PUSCHs is possible as UE capability.

As an example, in the case of a UE reporting that transmission/encoding processing for two PUSCHs is possible when the out-of-order PUSCH scheduling situation occurs, transmission/encoding processing for two PUSCHs in a cell in which an out-of-order PUSCH scheduling situation occurs is performed. Then, each of the two PUSCHs can be transmitted.

On the other hand, in the case of a UE reporting that transmission/encoding processing for two PUSCHs is impossible when the out-of-order PUSCH scheduling situation occurs, it may not be expected that an out-of-order PUSCH scheduling situation occurs for all cells.

Alternatively, when an out of sequence PUSCH scheduling situation occurs in any one cell, the UE is of a lower priority or for a PUSCH scheduled by UL grant DCI/PDCCH transmitted earlier in all serving cells in which the out of sequence PUSCH scheduling situation occurs. Processing of the PUSCH corresponding to the channel-related element can be dropped/terminated. Meanwhile, a rule may be defined so that the UE transmits only the PUSCH scheduled by the UL grant DCI/PDCCH transmitted later or the PUSCH corresponding to the channel-related element of higher priority.

<Example 4-3>

According to an example of the present disclosure, when a non-sequential PUSCH scheduling situation occurs, a UE capability report on whether transmission/encoding processing for two PUSCHs is possible is performed for each serving cell and/or cell group and/or BWP. It may be reported separately and independently.

When an out-of-order PUSCH scheduling situation occurs based on the UE capability report, when out-of-order PUSCH scheduling occurs in a serving cell that is reported to be capable of transmitting/encoding processing for two PUSCHs, the UE is assigned to two PUSCHs in the serving cell. After performing transmission/encoding processing for each of the two PUSCHs, each of the two PUSCHs may be transmitted.

On the other hand, when an out-of-order PUSCH scheduling situation occurs, when out-of-order PUSCH scheduling occurs in a serving cell reported that transmission/encoding processing for two PUSCHs is impossible, the UE may not expect such a situation.

Alternatively, the UE may drop/terminate the processing of the PUSCH scheduled by the UL grant DCI/PDCCH transmitted first in the corresponding serving cell or the PUSCH corresponding to a channel-related element of a lower priority. Meanwhile, a rule may be defined so that the UE transmits only the PUSCH scheduled by the UL grant DCI/PDCCH transmitted later or the PUSCH corresponding to the channel-related element of higher priority.

According to another example of the present disclosure, the UE capability report may be independently reported for each band/band combination. In this case, if non-sequential PUSCH scheduling occurs within the reported band/band combination, the UE performs transmission/encoding processing for two PUSCHs in all serving cells of the corresponding band/band combination, and then performs two PUSCHs. Each can be transmitted.

On the other hand, when out-of-order PUSCH scheduling occurs within the reported band/band combination as impossible, the UE may not expect such a situation. Alternatively, the UE drops the processing for the PUSCH scheduled by the UL grant DCI/PDCCH previously transmitted in the serving cell in all serving cells of the corresponding band/band combination or for the PUSCH corresponding to a channel-related element of a lower priority. /Can be terminated. Meanwhile, a rule may be defined so that the UE transmits only the PUSCH scheduled by the UL grant DCI/PDCCH transmitted later or the PUSCH corresponding to the channel-related element of higher priority.

<Example 4-4>

According to an example of the present disclosure, when the out-of-order PUSCH scheduling situation occurs simultaneously in a plurality of serving cells, the UE determines the maximum number of serving cells capable of simultaneous transmission/encoding processing for two PUSCHs in each serving cell as the UE capability. You can report it to. Specifically, the UE capability may be independently reported on a per band/band combination basis, and in this case, various implementations of Example 4-4 may be independently applied for each band/band combination set to the UE. Hereinafter, when the out-of-order PUSCH scheduling situation occurs simultaneously in a plurality of serving cells, the maximum number of serving cells capable of simultaneous transmission/encoding processing for two PUSCHs in each serving cell may be referred to as N_oop.

Meanwhile, the criterion for determining that the out-of-order PUSCH scheduling situation occurs simultaneously in a plurality of serving cells may be determined by a case in which some (or all) of the following cases occur.

-When the PUSCH section transmitted earlier from the later transmitted UL grant DCI/PDCCH causing out-of-order PUSCH scheduling overlaps in the time domain between serving cells or overlaps over a predetermined period (e.g., non-sequential in a specific serving cell UL grant DCI/PDCCH transmission and the UL grant causing out-of-order PUSCH scheduling in a serving cell in which a time domain interval between UL grant DCI/PDCCH transmission causing PUSCH scheduling and PUSCH corresponding to the UL grant DCI/PDCCH is different If the time domain between the PUSCHs corresponding to DCI/PDCCH overlaps a certain area or more)

-When the PUSCH interval transmitted first from the PUSCH transmitted later overlaps in the time domain between serving cells or overlaps over a certain interval (e.g., among two PUSCHs associated with out-of-order PUSCH scheduling in a specific serving cell, the first in the time domain Among the two PUSCHs associated with out-of-order PUSCH scheduling in a serving cell with a different time domain between the located PUSCH transmission and the later PUSCH transmission, the time domain between the first PUSCH transmission and the later PUSCH transmission in the time domain and more than a certain region Overlap)

-When the UL grant DCI/PDCCH transmitted later and the PUSCH period transmitted later overlap in the time domain between serving cells or overlap over a certain period (e.g., a UL grant that causes non-sequential PUSCH scheduling in a specific serving cell UL grant DCI/PDCCH transmission and the UL grant causing out-of-order PUSCH scheduling in a serving cell in a time domain between transmission of DCI/PDCCH and PUSCH transmitted after the PUSCH corresponding to the UL grant DCI/PDCCH When the time domain between PUSCH transmissions transmitted after the PUSCH corresponding to DCI/PDCCH overlaps with a certain region)

As a specific example of Example 4-4, when an out-of-order PUSCH scheduling situation occurs in a serving cell of N_oop or less among N-N_rem cells, the UE performs transmission/encoding processing for two PUSCHs in the serving cell. Each of the two PUSCHs can be transmitted.

On the other hand, when a non-sequential PUSCH scheduling situation occurs in a larger number of serving cells than N_oop, the UE may not expect such a situation. Alternatively, the UE may drop/terminate the processing of the PUSCH scheduled by the UL grant DCI/PDCCH transmitted first in all serving cells or the PUSCH corresponding to a channel-related element of a lower priority. Meanwhile, a rule may be defined so that the UE transmits only the PUSCH scheduled by the UL grant DCI/PDCCH transmitted later or the PUSCH corresponding to the channel-related element of higher priority.

Alternatively, the UE may perform transmission/encoding processing for two PUSCHs in the serving cell in N_oop (or X number of previously defined/configured/instructed) and then transmit two PUSCHs, respectively. For the remaining serving cells except for N_oop (or X previously defined/configured/instructed) serving cells, the UE is associated with a PUSCH scheduled by the UL grant DCI/PDCCH transmitted first or a lower priority channel. Processing for the PUSCH corresponding to the element may be dropped/terminated. Meanwhile, a rule may be defined so that the UE transmits only the PUSCH scheduled by the UL grant DCI/PDCCH transmitted later or the PUSCH corresponding to the channel-related element of higher priority. In this case, the priority for determining the N_oop number (or X number of previously defined/set/instructed) serving cells may be determined in consideration of (all or part of) the following conditions.

-Channel-related elements of the later transmitted UL grant DCI/PDCCH (or the previously transmitted PUSCH scheduled by this) causing out-of-order PUSCH scheduling are selected first from the highest priority

-Channel-related elements of the PUSCH transmitted later are preferentially selected from the highest priority

-From the UL grant DCI/PDCCH transmitted first, the time gap corresponding to the PUSCH transmitted later is preferentially selected from the shortest order

-The first transmitted PUSCH symbol in each cell is preferentially selected from the earliest order

-Serving cell index (e.g., lower index to higher index, that is, lower index takes precedence over higher index)

-Band index (e.g., lower index to higher index, that is, lower index takes precedence over higher index)

-Priority selection from the serving cell set by the base station through a higher layer signal and/or indicated through a physical layer signal

As another specific example of Example 4-4, an element related to the CA capability of the UE, as an example, the number of supportable cells is N, the number of unconfigured cells or the number of deactivated cells or scheduling does not overlap. When the number of cells is N_rem, if a non-sequential PUSCH scheduling situation occurs in a serving cell of N_oop + N_rem (or N_oop + N_rem + alpha, where alpha is an integer other than 0) among N-N_rem cells, the UE May perform transmission/encoding processing for two PUSCHs in a corresponding serving cell and then transmit two PUSCHs, respectively.

On the other hand, when a non-sequential PUSCH scheduling situation occurs in a serving cell number greater than N_oop + N_rem (or N_oop + N_rem + alpha) among N-N_rem cells, the UE may not expect such a situation. Alternatively, the UE may drop/terminate the processing of the PUSCH scheduled by the UL grant DCI/PDCCH transmitted first in all serving cells or the PUSCH corresponding to a channel-related element of a lower priority. Meanwhile, a rule may be defined so that the UE transmits only the PUSCH scheduled by the UL grant DCI/PDCCH transmitted later or the PUSCH corresponding to the channel-related element of higher priority.

Alternatively, the UE performs transmission/encoding processing for two PUSCHs in the serving cell in N_oop + N_rem (or N_oop + N_rem + alpha or X previously defined/configured/instructed) serving cells and then performs two PUSCHs, respectively. Can be transmitted.

Meanwhile, for the remaining serving cells except for N_oop + N_rem (or N_oop + N_rem + alpha or previously defined/configured/instructed X) serving cells, the UE is the PUSCH scheduled by the UL grant DCI/PDCCH transmitted first. It is possible to drop/terminate the processing of the PUSCH corresponding to the channel-related element of or lower priority. Meanwhile, a rule may be defined so that the UE transmits only the PUSCH scheduled by the UL grant DCI/PDCCH transmitted later or the PUSCH corresponding to the channel-related element of higher priority. At this time, the priority for determining the N_oop + N_rem (or N_oop + N_rem + alpha or X previously defined/set/instructed) serving cells may be determined by considering (all or part of) the following conditions. have.

-Channel-related elements of the later transmitted UL grant DCI/PDCCH (or the previously transmitted PUSCH scheduled by this) that cause out-of-order PUSCH scheduling are first selected from a higher priority (e.g., out of sequence PUSCH scheduling is a situation) When the UL grant DCI/PDCCH causing out-of-order PUSCH scheduling is transmitted in each of the generated serving cells, the UL grant DCI/PDCCH having a high channel-related element is preferentially selected from the serving cell transmitted)

-The channel-related element of the PUSCH transmitted later is preferentially selected from the high priority (e.g., from the serving cell in which the PUSCH having a high channel-related element among the PUSCHs transmitted later among the two PUSCHs related to the non-sequential PUSCH scheduling situation is transmitted Preferentially)

-Priority selection from a serving cell with a short time gap between the UL grant DCI/PDCCH transmitted first and the PUSCH transmitted later

-The start symbol of the PUSCH transmitted first in each cell is preferentially selected from the earliest order

-Serving cell index (e.g., lower index to higher index, that is, lower index takes precedence over higher index)

-Band index (e.g., lower index to higher index, that is, lower index takes precedence over higher index)

-Priority selection from the serving cell set by the base station through a higher layer signal and/or indicated through a physical layer signal

In the above-described various examples of the present disclosure, the processing of the serving cells as much as N_rem or as much as N_rem + alpha is an element related to CA capability by utilizing the CA capability of the UE, as an example, when the number of supported cells is N Among the N serving cells, it may be possible to process two PUSCHs in more cells by borrowing processing power of an unconfigured or deactivated serving cell or a serving cell whose scheduling does not overlap.

<Example 5>

According to an example of the present disclosure, when the out-of-order PUSCH scheduling situation occurs in some (or all) cells of a plurality of cells, according to UE capability and/or pre-defined/promise/configuration/instructed gNB scheduling. , Transmission/encoding processing for a PUSCH scheduled by a previously transmitted UL grant DCI/PDCCH of a specific cell or a PUSCH corresponding to a channel-related element of a lower priority may be dropped/terminated. In this case, it may not be desirable to multiplex the data and the UCI to be transmitted together to the PUSCH where the transmission/encoding processing is dropped/terminated. Accordingly, Example 5 discloses various examples of a transmission method of UCI, which was to be transmitted by multiplexing with data on a PUSCH in which transmission/encoding processing is dropped/terminated in the above situation. Examples 5-1 to 5-3 below may be combined and applied together as long as they are not mutually disposed.

17 is a flowchart illustrating various examples related to transmission of uplink control information (UCI) according to the present disclosure.

In FIG. 17, channel 1 may be a PUSCH on which transmission/encoding processing is dropped/terminated, and channel 2 may be an uplink channel (eg, PUCCH, PUSCH) satisfying a specific condition. In this case, the specific condition may be predefined in the 3GPP LTE/NR standard document, or may be set to the UE by the network or the base station.

Referring to FIG. 17, in S1401, an out-of-order PUSCH scheduling situation may occur. The out-of-order PUSCH scheduling situation may occur in some or all of a plurality of cells.

In S1403, the UE may transmit the UCI of channel 1 to channel 2 when a specific condition is satisfied. Here, when the UCI is transmitted to the channel 2 together, for example, when the channel 2 is a PUSCH, the UCI is piggybacked to the PUSCH and transmitted. Here, piggyback may refer to an operation of transmitting UCI to PUSCH resources with UL data or without UL-SCH data (ie, without a TB for UL-SCH) alone.

<Example 5-1>

The UCI, which was scheduled to be transmitted by multiplexing with data on the PUSCH where transmission/encoding processing is dropped/terminated, and being transmitted together, is the PUSCH scheduled by the UL grant DCI/PDCCH transmitted later in the serving cell in which the out of sequence PUSCH scheduling situation occurred It may be transmitted by being piggybacked on the PUSCH corresponding to the channel-related element of the priority.

Meanwhile, in the operation of Example 5-1, the time difference between the first symbol of the PUSCH to be piggybacked and the last symbol of the PDSCH is a constant value (eg,

, See 9.2.5 of TS 38.213) and/or between the first symbol of the PUSCH to be piggybacked in the time domain and the last symbol of the PDCCH (for scheduling the PDSCH / scheduling the PUSCH / for the purpose of SPS PDSCH release) The time difference is constant (e.g.

or

or

, See 9.2.5 of TS 38.213) may be applied only if it exceeds. This may mean that the operation of Example 5-1 can be applied only when sufficient processing time for the piggyback operation is secured.

<Example 5-2>

The UCI that was scheduled to be transmitted by multiplexing with data on the PUSCH on which the transmission/encoding processing is dropped/terminated is a PUCCH overlapping (or starting at the same time or starting later) in the time domain with the corresponding PUSCH or a PUSCH of another serving cell It may be transmitted by being piggybacked on the PUSCH of one serving cell. If transmitted on a PUSCH, the priority for determining the serving cell may be determined in consideration of (all or part of) the following conditions, and in particular, the PUSCH is selected by priority among the dropped/not terminated PUSCHs. Can be.

-Excluding the dropped/terminated PUSCH, when comparing the start symbols of the dropped/terminated PUSCH in each cell and the PUSCH overlapping in the time domain (or starting at the same time or starting after) between cells, from the earliest order Preferentially select

-Drop/end when comparing the start symbol of the dropped/terminated PUSCH in each cell and the PUSCH overlapping in the time domain (or starting at the same time or starting later) except for the dropped/terminated PUSCH, between cells The same as the start symbol of the PUSCH or the earliest order is selected first

-Excluding the dropped/terminated PUSCH, among the dropped/terminated PUSCHs in each cell and the PUSCHs overlapping (or starting at the same time or starting after) in the time domain, the channel-related element is preferentially selected from the highest priority

-Excluding the dropped/terminated PUSCH, the first transmitted (e.g., start and/or last) PUSCH overlapping (or starting at the same time or starting after) on the time domain with the dropped/terminated PUSCH in each cell The symbol is the fastest) from the PUSCH scheduled by the UL grant DCI/PDCCH.

-Serving cell index (e.g., lower index to higher index, that is, lower index takes precedence over higher index)

<Example 5-3>

The UCI, which has been multiplexed with data on the PUSCH on which transmission/encoding processing is dropped/terminated, and is to be transmitted together, may be transmitted as it is to the corresponding PUSCH resource. In this case, the PUSCH may be channel transmission including only UCI without data (eg, UL-SCH data). In particular, without changing the mapping of UCI, a rule may be defined so that the UCI-mapped RE is filled with a dummy signal or the power of the UCI-unmapped symbol is reduced (including reducing to zero power). have.

<Example 6>

When the out-of-order HARQ-ACK/PUSCH scheduling (or resource collision between dynamic PUSCHs or, more generally, resource collision between two UL channels) occurs, a certain TPC for the PUSCHs and PUSCHs scheduled thereafter ( A rule for whether to apply a transmit power control command or to perform power accumulation using a power of a PUSCH as a reference power may be defined.

18 is for explaining PUSCH power control in a non-sequential HARQ-ACK/PUSCH scheduling situation according to an example of the present disclosure.

Referring to FIG. 18, when a non-sequential HARQ-ACK/PUSCH scheduling situation occurs, the reference channel for power control adjustment of PUSCH 4 becomes PUSCH 2 and all TPC commands are applied, so excessive power update may be caused to PUSCH 4. I can.

When the out-of-order HARQ-ACK/PUSCH scheduling (or resource collision between dynamic PUSCHs or more generally resource collision between two UL channels) occurs, in Examples 6-1 to 6-3 below, by TPC Various examples for closed-loop UL power control are disclosed.

<Example 6-1>

According to an example of the present disclosure, if transmission/encoding processing for a specific channel is dropped/terminated, the UE discards the TPC command in the PDCCH for scheduling the channel (or related to transmission of the corresponding channel) And, it may not be considered for power control adjustment of the PUSCH in the future. Also, the dropped/terminated channel may not be used as a reference channel for power control adjustment.

19 is for explaining PUSCH power control in a non-sequential HARQ-ACK/PUSCH scheduling situation according to another example of the present disclosure.

Referring to FIG. 19, when a PUSCH 2 channel is dropped when a non-sequential HARQ-ACK/PUSCH scheduling situation occurs, a TPC command (TPC = b) in the PDCCH scheduling the corresponding channel is discarded, and the dropped PUSCH 2 channel is power It may not be used as a reference channel for control adjustment.

<Example 6-2>

According to an example of the present disclosure, regardless of whether a channel is dropped/terminated, it always corresponds to a PUSCH scheduled by a PDCCH transmitted first, a PUCCH triggered by a PDCCH transmitted earlier, or a channel-related element of a lower priority. The TPC command in the PDCCH corresponding to the PUSCH/PUCCH may not be considered for power control adjustment for the subsequent PUSCH that is not associated with the out-of-order HARQ-ACK/PUSCH. In addition, the PUSCH scheduled by the PDCCH transmitted earlier, the PUCCH triggered by the PDCCH transmitted earlier, or the PUSCH/PUCCH corresponding to a channel-related element of a lower priority may not be used as a reference channel for power control adjustment. .

FIG. 20 is for explaining PUSCH power control in a non-sequential HARQ-ACK/PUSCH scheduling situation according to another example of the present disclosure.

Referring to FIG. 20, when a non-sequential HARQ-ACK/PUSCH scheduling situation occurs, a PDCCH first transmitted, that is, a TPC command in PDCCH 2 (TPC = b) may not be considered for power control adjustment for PUSCH 4. Also, the PUSCH 2 channel triggered by PDCCH 2 may not be used as a reference channel for power control adjustment.

<Example 6-3>

According to an example of the present disclosure, the UE uses a TPC command for a PUSCH scheduled by a later transmitted PDCCH, a PUCCH triggered by a later transmitted PDCCH, or a PUSCH/PUCCH corresponding to a higher priority channel-related element. The power control adjustment may be applied, but the TPC command may be discarded to the PUSCH/PUCCH transmitted later and/or may not be considered as a reference channel for power control adjustment of the PUSCH/PUCCH transmitted later.

21 is for explaining PUSCH power control in a non-sequential HARQ-ACK/PUSCH scheduling situation according to another example of the present disclosure.

Referring to FIG. 21, a PDCCH transmitted later when a non-sequential HARQ-ACK/PUSCH scheduling situation occurs, that is, PUSCH 4 transmitted after PUSCH 3 scheduled by PDCCH 3, a TPC command (TPC = c) in PDCCH 3 May not apply.

<Example 7>

In the case of the out-of-order HARQ-ACK/PUSCH scheduling (or resource collision between dynamic PDSCHs or resource collision between dynamic PUSCHs), priority for two HARQ-ACK PUCCHs or two PUSCHs (or UE operation such as drop) ) May be determined by the PDCCH transmission order (for PDSCH or PUSCH scheduling purposes) causing the above situation. That is, to give a lower priority (or apply an operation such as drop) to the HARQ-ACK PUCCH corresponding to the PDSCH scheduled by the PDCCH having a faster transmission order or the PUSCH scheduled by the PDCCH having the faster transmission order. Rules can be defined. As an example, in the case of a PUSCH of slot n+k scheduled by a PDCCH transmitted in slot n in a non-sequential PUSCH scheduling situation and a PUSCH of slot n+k-1 scheduled by a PDCCH transmitted in slot n+1 , PUSCH of slot n+k-1 scheduled by a later transmitted PDCCH may be considered to have a higher priority.

Meanwhile, in this situation, if two PDCCH transmissions overlap each other in the time domain, a method of determining the transmission order of the PDCCH may be problematic. In order to solve this, the PDCCH transmission order in the above case may be determined according to the following condition(s) (or a combination of conditions). Or more generally, UCI in which transmission is triggered by PDSCH/PUSCH and/or PDCCH scheduled by PDCCH and/or PDCCH according to the following condition(s) (or a combination of conditions) (eg, HARQ- The priority of ACK) may be determined.

-The earlier the start symbol of the PDCCH is, the earlier the transmission order of the PDCCH is and/or the priority is considered to be lower.

-It is considered that the earlier the last symbol of the PDCCH is, the earlier the transmission order of the PDCCH is and/or the priority is low.

-As the start symbol of the search space to which the detected PDCCH belongs is earlier, the transmission order of the PDCCH is considered to be earlier and/or the priority is lower.

-As the last symbol of the search space to which the detected PDCCH belongs is earlier, the transmission order of the PDCCH is considered to be earlier and/or the priority is low.

-The lower the search space/CORESET ID, the earlier the transmission order of the PDCCH is and/or the priority is considered to be lower.

-Processing time (eg, PDSCH to HARQ-ACK, PDCCH to PUSCH) is considered to be earlier and/or that the priority is low

-Considered that the transmission order of the PDCCH instructed to apply a longer value of the PDSCH/PUSCH processing time capability is earlier and/or the priority is low

-It is considered that the transmission order of the PDCCH corresponding to a specific RNTI/DCI format/search space/CORESET defined in advance (or set) is earlier and/or the priority is low

In addition, processing time capability (e.g., PDSCH processing capability 1 or 2, PUSCH timing capability 1 or 2) to be applied to PDCCH and/or PDSCH/PUSCH scheduled by PDCCH according to the following condition(s) (or a combination of conditions) ) Can be determined.

-The earlier the start symbol of the PDCCH is, the earlier the transmission order of the PDCCH is considered and/or the capability 1

-The earlier the last symbol of the PDCCH is, the earlier the transmission order of the PDCCH is and/or regarded as capability 1.

-As the start symbol of the search space to which the detected PDCCH belongs is earlier, the transmission order of the PDCCH is considered to be earlier and/or capacity 1

-As the last symbol of the search space to which the detected PDCCH belongs is earlier, the transmission order of the PDCCH is considered to be earlier and/or as capability 1

-The lower the search space/CORESET ID, the earlier the transmission order of the PDCCH is and/or regarded as capability 1.

-Processing time (eg, PDSCH to HARQ-ACK, PDCCH to PUSCH) is considered to be earlier and/or capability 1 that the transmission order of the PDCCH indicated by a long value

-The transmission order of the PDCCH corresponding to a specific RNTI/DCI format/search space/CORESET defined in advance (or set) is considered to be earlier and/or as capability 1

22 is a flowchart of a method for transmitting an uplink signal by a user equipment according to an example of the present disclosure.

Referring to FIG. 22, in S1501, the user equipment may receive a first PDSCH and a second PDSCH from a base station. In this case, the second PDSCH may be located after the first PDSCH in the time domain.

In S1503, the user equipment may transmit a first HARQ-ACK response for the first PDSCH and a second HARQ-ACK response for the second PDSCH to the base station. In this case, the second uplink resource associated with the second HARQ-ACK response may be located earlier in the time domain than the first uplink resource associated with the first HARQ-ACK response. That is, the first PDSCH and the second PDSCH received in S1501, and the first HARQ-ACK response and the second HARQ-ACK transmitted in S1503 may be related to a non-sequential HARQ-ACK situation.

Meanwhile, the first HARQ-ACK response may include only NACK based on the fact that the number of serving cells in which an out-of-order HARQ-ACK situation occurs is greater than a predetermined value. Here, the predetermined value may be the maximum number of serving cells in which reception/decoding of the PDSCH located earlier in the time domain is allowed. For example, the specific value may be N_ooh. In addition, the out-of-order HARQ-ACK situation is a situation in which the HARQ-ACK response for the PDSCH located earlier in the time domain overlaps with the HARQ-ACK response for the PDSCH located in the time domain as described above, or is transmitted later. I can.

In addition, based on the fact that the number of serving cells in which the out-of-order HARQ-ACK situation occurs is greater than the predetermined value, the number of serving cells in which the out-of-order HARQ-ACK situation occurs is as many as the number corresponding to the predetermined value. The HARQ-ACK response for a PDSCH located later on the time domain transmitted from the remaining serving cells except for the serving cells may include only the NACK. This means that the UE can process an out-of-order HARQ-ACK situation (ie, reception/decoding for two PDSCHs related to the out-of-order HARQ-ACK situation is possible) according to the UE capability. Serving cells may be processing an out-of-order HARQ-ACK situation.

Meanwhile, the uplink signal transmission method of the user equipment may further include determining as many serving cells as the number corresponding to the predetermined value among the serving cells in which the out-of-order HARQ-ACK condition has occurred. In this case, the serving cells as many as the number corresponding to the predetermined value may be determined based on cell indexes of the serving cells in which the out-of-order HARQ-ACK condition has occurred.

In addition, the method of transmitting an uplink signal by the user equipment may further include transmitting information on the predetermined value. The base station may perform scheduling for the user equipment based on the information on the predetermined value.

23 is a flowchart of a method for receiving an uplink by a base station according to an example of the present disclosure.

Referring to FIG. 23, in S1601, the base station may transmit a first PDSCH and a second PDSCH to the UE. In this case, the second PDSCH may be located after the first PDSCH in the time domain.

In S1603, the base station may receive a first HARQ-ACK response for the first PDSCH and a second HARQ-ACK response for the second PDSCH from the UE. In this case, the second uplink resource associated with the second HARQ-ACK response may be located earlier in the time domain than the first uplink resource associated with the first HARQ-ACK response. That is, the first PDSCH and the second PDSCH transmitted in S1601, and the first HARQ-ACK response and the second HARQ-ACK transmitted in S1603 may be related to a non-sequential HARQ-ACK situation.

Examples of the present disclosure disclosed as described above have been provided to enable any person skilled in the art related to the present disclosure to implement and implement the present disclosure. Although the above has been described with reference to examples of the present disclosure, those skilled in the art may variously modify and change the examples of the present disclosure. Thus, the present disclosure is not intended to be limited to the examples described herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Implementations of the present disclosure may be used in a wireless communication system, a base station or user equipment, and other equipment.

Claims (11)

1. In a method for transmitting a signal by a user device in a wireless communication system,

   Receiving a first PDSCH (physical downlink shared channel) and a second PDSCH, wherein the second PDSCH is located after the first PDSCH in a time domain; And

   Transmitting a first HARQ-ACK (Hybrid Automatic Repeat and request acknowledgment) response for the first PDSCH and a second HARQ-ACK response for the second PDSCH,

   The second uplink resource associated with the second HARQ-ACK response is located earlier in the time domain than the first uplink resource associated with the first HARQ-ACK response,

   The first HARQ-ACK response includes only NACK based on the fact that the number of serving cells in which an out-of-order HARQ-ACK situation occurs is greater than a predetermined value,

   The out-of-order HARQ-ACK situation is a situation in which a HARQ-ACK response for a PDSCH located earlier in the time domain is transmitted by overlapping with a HARQ-ACK response for a PDSCH located later in the time domain or transmitted later,

   Signal transmission method.
2. The method of claim 1,

   The predetermined value is the maximum number of serving cells for which decoding of the PDSCH located earlier in the time domain is allowed,

   Signal transmission method.
3. The method of claim 1,

   Based on the fact that the number of serving cells in which the out-of-order HARQ-ACK situation occurs is greater than the predetermined value, serving cells as many as the number corresponding to the predetermined value among the serving cells in which the out-of-order HARQ-ACK situation occurs The HARQ-ACK response for the PDSCH located earlier in the time domain transmitted from the remaining serving cells except for the NACK includes only the NACK,

   Signal transmission method.
4. The method of claim 3,

   Further comprising determining the serving cells as many as the number corresponding to the predetermined value among the serving cells in which the out-of-order HARQ-ACK situation has occurred,

   Signal transmission method.
5. The method of claim 4,

   The serving cells as many as the number corresponding to the predetermined value are determined based on cell indexes of the serving cells in which the out-of-order HARQ-ACK situation occurs,

   Signal transmission method.
6. The method of claim 1,

   Further comprising transmitting information on the predetermined value,

   Signal transmission method.
7. In the device for user equipment in a wireless communication system,

   At least one processor; And

   And at least one memory (memory) operably connected to the at least one or more processors to store at least one or more instructions for causing the at least one or more processors to perform operations, wherein the operations include:

   Receiving a first PDSCH (physical downlink shared channel) and a second PDSCH, wherein the second PDSCH is located after the first PDSCH in a time domain; And

   Transmitting a first HARQ-ACK (Hybrid Automatic Repeat and request acknowledgment) response for the first PDSCH and a second HARQ-ACK response for the second PDSCH,

   The second uplink resource associated with the second HARQ-ACK response is located earlier in the time domain than the first uplink resource associated with the first HARQ-ACK response,

   The first HARQ-ACK response includes only NACK based on the fact that the number of serving cells in which an out-of-order HARQ-ACK situation occurs is greater than a predetermined value,

   The out-of-order HARQ-ACK situation is a situation in which a HARQ-ACK response for a PDSCH located earlier in the time domain is transmitted by overlapping with a HARQ-ACK response for a PDSCH located later in the time domain or transmitted later,

   Device.
8. In the user equipment that transmits signals in a wireless communication system,

   At least one transceiver;

   At least one processor; And

   And at least one memory (memory) operably connected to the at least one or more processors to store at least one or more instructions for causing the at least one or more processors to perform operations, wherein the operations include:

   Receiving a first PDSCH (physical downlink shared channel) and a second PDSCH, wherein the second PDSCH is located after the first PDSCH in a time domain; And

   Transmitting a first HARQ-ACK (Hybrid Automatic Repeat and request acknowledgment) response for the first PDSCH and a second HARQ-ACK response for the second PDSCH,

   The second uplink resource associated with the second HARQ-ACK response is located earlier in the time domain than the first uplink resource associated with the first HARQ-ACK response,

   The first HARQ-ACK response includes only NACK based on the fact that the number of serving cells in which an out-of-order HARQ-ACK situation occurs is greater than a predetermined value,

   The out-of-order HARQ-ACK situation is a situation in which a HARQ-ACK response for a PDSCH located earlier in the time domain is transmitted by overlapping with a HARQ-ACK response for a PDSCH located later in the time domain or transmitted later,

   User device.
9. A computer-readable storage medium comprising:

   The computer-readable storage medium stores at least one computer program including at least one or more instructions that when executed by at least one or more processors cause the at least one or more processors to perform operations for a user device, and , The actions are:

   Receiving a first PDSCH (physical downlink shared channel) and a second PDSCH, wherein the second PDSCH is located after the first PDSCH in a time domain; And

   Transmitting a first HARQ-ACK (Hybrid Automatic Repeat and request acknowledgment) response for the first PDSCH and a second HARQ-ACK response for the second PDSCH,

   The second uplink resource associated with the second HARQ-ACK response is located earlier in the time domain than the first uplink resource associated with the first HARQ-ACK response,

   The first HARQ-ACK response includes only NACK based on the fact that the number of serving cells in which an out-of-order HARQ-ACK situation occurs is greater than a predetermined value,

   The out-of-order HARQ-ACK situation is a situation in which a HARQ-ACK response for a PDSCH located earlier in the time domain is transmitted by overlapping with a HARQ-ACK response for a PDSCH located later in the time domain or transmitted later,

   Computer readable storage media.
10. In a method for a base station to receive a signal in a wireless communication system,

    Transmits a first PDSCH (physical downlink shared channel) and a second PDSCH, wherein the second PDSCH is located in a time domain after the first PDSCH; And

    Receiving a first HARQ-ACK (Hybrid Automatic Repeat and request acknowledgment) response for the first PDSCH and a second HARQ-ACK response for the second PDSCH,

    The second uplink resource associated with the second HARQ-ACK response is located earlier in the time domain than the first uplink resource associated with the first HARQ-ACK response,

    The first HARQ-ACK response includes only NACK based on the fact that the number of serving cells in which an out-of-order HARQ-ACK situation occurs is greater than a predetermined value,

    The out-of-order HARQ-ACK situation is a situation in which a HARQ-ACK response for a PDSCH located earlier in the time domain is received by overlapping with a HARQ-ACK response for a PDSCH located later in the time domain, or is received later,

    How to receive signals.
11. In the base station for receiving a signal in a wireless communication system,

    At least one processor; And

    And at least one memory (memory) operably connected to the at least one or more processors to store at least one or more instructions for causing the at least one or more processors to perform operations, wherein the operations include:

    Transmits a first PDSCH (physical downlink shared channel) and a second PDSCH, wherein the second PDSCH is located in a time domain after the first PDSCH; And

    Receiving a first HARQ-ACK (Hybrid Automatic Repeat and request acknowledgment) response for the first PDSCH and a second HARQ-ACK response for the second PDSCH,

    The second uplink resource associated with the second HARQ-ACK response is located earlier in the time domain than the first uplink resource associated with the first HARQ-ACK response,

    The first HARQ-ACK response includes only NACK based on the fact that the number of serving cells in which an out-of-order HARQ-ACK situation occurs is greater than a predetermined value,

    The out-of-order HARQ-ACK situation is a situation in which a HARQ-ACK response for a PDSCH located earlier in the time domain is received by overlapping with a HARQ-ACK response for a PDSCH located later in the time domain, or is received later,

    Base station.

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