KR20220131126A - Method and apparatus for uplink transmit power control for network cooperative communication system - Google Patents

Abstract

The present disclosure relates to a communication technique for converging a 5G communication system with IoT technology to support a higher data transfer rate after a 4G system, and a system thereof. The present disclosure can be applied to intelligent services (for example, smart home, smart building, smart city, smart car or connected car, health care, digital education, retail business, security- and safety-related services, etc.) based on 5G communication technology and IoT-related technology. In the present disclosure, disclosed are a method and apparatus for a terminal to control transmission power of an uplink signal in consideration of multiple transmission points/panels/beams for cooperative communication between multiple transmission points/panels/beams. A control signal processing method in a wireless communication system includes the steps of: receiving a first control signal transmitted from a base station; processing the received first control signal; and transmitting a second control signal, generated based on the processing, to the base station.

Description

Uplink transmission power control method and apparatus for network cooperative communication system

The present disclosure relates to a wireless communication system, and more particularly, to a method and apparatus for controlling uplink transmission power in consideration of multiple transmission points/panels/beams by a terminal for cooperative communication between multiple transmission points/panels/beams. .

Efforts are being made to develop an improved 5G communication system or pre-5G communication system in order to meet the increasing demand for wireless data traffic after commercialization of the 4G communication system. For this reason, the 5G communication system or the pre-5G communication system is called a system after the 4G network (Beyond 4G Network) communication system or the LTE system after (Post LTE). In order to achieve a high data rate, the 5G communication system is being considered for implementation in a very high frequency (mmWave) band (eg, such as a 60 gigabyte (60 GHz) band). In order to alleviate the path loss of radio waves and increase the propagation distance of radio waves in the very high frequency band, in the 5G communication system, beamforming, massive MIMO, and Full Dimensional MIMO (FD-MIMO) are used. ), array antenna, analog beam-forming, and large scale antenna technologies are being discussed. In addition, for network improvement of the system, in the 5G communication system, an evolved small cell, an advanced small cell, a cloud radio access network (cloud radio access network: cloud RAN), an ultra-dense network (ultra-dense network) , Device to Device communication (D2D), wireless backhaul, moving network, cooperative communication, Coordinated Multi-Points (CoMP), and interference cancellation Technology development is underway. In addition, in the 5G system, the advanced coding modulation (ACM) methods FQAM (Hybrid FSK and QAM Modulation) and SWSC (Sliding Window Superposition Coding), and advanced access technologies FBMC (Filter Bank Multi Carrier), NOMA (non orthogonal multiple access), and sparse code multiple access (SCMA) are being developed.

On the other hand, the Internet is evolving from a human-centered connection network where humans create and consume information to an Internet of Things (IoT) network that exchanges and processes information between distributed components such as objects. Internet of Everything (IoE) technology, which combines big data processing technology through connection with cloud servers, etc. with IoT technology, is also emerging. In order to implement IoT, technology elements such as sensing technology, wired and wireless communication and network infrastructure, service interface technology, and security technology are required. , M2M), and MTC (Machine Type Communication) are being studied. In the IoT environment, an intelligent IT (Internet Technology) service that collects and analyzes data generated from connected objects and creates new values in human life can be provided. IoT is a field of smart home, smart building, smart city, smart car or connected car, smart grid, health care, smart home appliance, advanced medical service, etc. can be applied to

Accordingly, various attempts are being made to apply the 5G communication system to the IoT network. For example, in technologies such as sensor network, machine to machine (M2M), and MTC (Machine Type Communication), 5G communication technology is implemented by techniques such as beam forming, MIMO, and array antenna. there will be The application of a cloud radio access network (cloud RAN) as the big data processing technology described above is an example of the convergence of 5G technology and IoT technology.

On the other hand, for network coordination in a wireless communication system, the terminal performs transmission power control for transmitting an uplink data signal or an uplink control signal to a plurality of transmission points/panels/beams. and devices are required.

The present disclosure provides a method for controlling transmission power for a terminal to transmit an uplink data signal or an uplink control signal to a plurality of transmission points/panels/beams for network coordination in a wireless communication system provides

The present invention for solving the above problems is a method for processing an uplink signal in a wireless communication system, the method comprising: receiving a first control signal transmitted from a base station; processing the received first control signal; and transmitting a second uplink signal generated based on the processing to the base station.

According to the present disclosure, when network cooperative communication is used in a wireless communication system, the terminal controls the uplink transmission power for each transmission point/panel/beam, thereby distributing the optimized transmission power for each transmission point/panel/beam to the uplink signal can be transmitted.

1 is a diagram illustrating a basic structure of a time-frequency domain of a mobile communication system according to an embodiment of the present disclosure.
2 is a diagram for explaining the structure of a frame, a subframe, and a slot of a mobile communication system according to an embodiment of the present disclosure.
3 illustrates an example of a configuration of a bandwidth part (BWP) in a wireless communication system according to an embodiment of the present disclosure.
4 is a diagram illustrating an example of setting a control region of a downlink control channel in a wireless communication system according to an embodiment of the present disclosure.
5 is a diagram for explaining the structure of a downlink control channel of a mobile communication system according to an embodiment of the present disclosure.
6 is a diagram illustrating an example of allocating a frequency axis resource of a physical downlink shared channel (PDSCH) in a wireless communication system according to an embodiment of the present disclosure.
7 is a diagram illustrating an example of time axis resource allocation of a PDSCH in a wireless communication system according to an embodiment of the present disclosure.
8 is a diagram illustrating an example of time axis resource allocation according to subcarrier intervals of a data channel and a control channel in a wireless communication system according to an embodiment of the present disclosure.
9 is a diagram illustrating a case in which a plurality of PUCCH resources overlap for HARQ-ACK transmission for PDSCH when multi-slot repetition is not set according to an embodiment of the present disclosure.
10 is a diagram illustrating a case in which the PUCCH resource overlaps when multi-slot repetition is set according to an embodiment of the present disclosure.
11 is a diagram illustrating a structure of a base station and a terminal radio protocol when performing single cell, carrier aggregation, and dual connectivity according to an embodiment of the present disclosure.
12 is a diagram illustrating an example of an antenna port configuration and resource allocation for cooperative communication in a wireless communication system according to an embodiment of the present disclosure.
13 is a diagram illustrating an example of downlink control information (DCI) configuration for cooperative communication in a wireless communication system according to an embodiment of the present disclosure.
14A is a diagram illustrating a HARQ-ACK information delivery method when a single PDCCH is used for NC-JT transmission in a wireless communication system according to an embodiment of the present disclosure.
14B is a diagram illustrating a joint HARQ-ACK information transmission method when multi-PDCCH is used for NC-JT transmission in a wireless communication system according to an embodiment of the present disclosure.
14C is a diagram illustrating an inter-slot time division multiplexed HARQ-ACK information delivery method when multi-PDCCH is used for NC-JT transmission in a wireless communication system according to an embodiment of the present disclosure.
14D is a diagram illustrating an intra-slot time division multiplexed HARQ-ACK information delivery method when multi-PDCCH is used for NC-JT transmission in a wireless communication system according to an embodiment of the present disclosure.
15 is a diagram illustrating an example of a method in which a terminal transmits HARQ-ACK information for NC-JT transmission to a base station in a wireless communication system according to an embodiment of the present disclosure.
16 is a diagram illustrating an example of a method for a base station to receive HARQ-ACK information for NC-JT transmission from a terminal in a wireless communication system according to an embodiment of the present disclosure.
17 is a diagram illustrating operations of a base station and a terminal for repeated PUSCH transmission in consideration of multiple TRP based on single DCI transmission in which a plurality of SRI or TPMI fields exist according to an embodiment of the present disclosure. It is a diagram illustrating repeated PUCCH transmission in sub-slot units in a wireless communication system according to an embodiment.
18B is a diagram illustrating repeated PUCCH transmission in a slot or a sub-slot in a wireless communication system according to an embodiment of the present disclosure.
18C is another diagram illustrating repeated PUCCH transmission in a slot or a sub-slot in a wireless communication system according to an embodiment of the present disclosure.
19 is a diagram illustrating an example of a mapping rule between repeated PUCCH transmission and a transmission and reception point (TRP) according to an embodiment of the present disclosure.
20 is a diagram illustrating an example of a MAC CE structure for activating PUCCH-SpatialRelationInfo of a PUCCH resource to support repeated PUCCH transmission with multiple TRPs.
21 is a diagram illustrating an example of mapping between repeated PUSCH transmission and a transmission and reception point (TRP) according to an embodiment of the present disclosure.
22 illustrates a structure of a terminal in a wireless communication system according to an embodiment of the present disclosure.
23 illustrates a structure of a base station in a wireless communication system according to an embodiment of the present disclosure.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

In describing the embodiments, descriptions of technical contents that are well known in the technical field to which the present invention pertains and are not directly related to the present invention will be omitted. This is to more clearly convey the gist of the present invention by omitting unnecessary description.

For the same reason, some components are exaggerated, omitted, or schematically illustrated in the accompanying drawings. In addition, the size of each component does not fully reflect the actual size. In each figure, the same or corresponding elements are assigned the same reference numerals.

Advantages and features of the present invention, and a method of achieving them will become apparent with reference to the embodiments described below in detail in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but may be implemented in various different forms, and only the embodiments of the present disclosure make the present disclosure complete, and common knowledge in the technical field to which the present invention pertains It is provided to fully inform the possessor of the scope of the invention, and the present disclosure is only defined by the scope of the claims. Like reference numerals refer to like elements throughout.

At this time, it will be understood that each block of the flowchart diagrams and combinations of the flowchart diagrams may be performed by computer program instructions. These computer program instructions may be embodied in a processor of a general purpose computer, special purpose computer, or other programmable data processing equipment, such that the instructions performed by the processor of the computer or other programmable data processing equipment are not described in the flowchart block(s). It creates a means to perform functions. These computer program instructions may also be stored in a computer-usable or computer-readable memory that may direct a computer or other programmable data processing equipment to implement a function in a particular manner, and thus the computer-usable or computer-readable memory. It may also be possible for the instructions stored in the flowchart block(s) to produce an article of manufacture containing instruction means for performing the function described in the flowchart block(s). The computer program instructions may also be mounted on a computer or other programmable data processing equipment, such that a series of operational steps are performed on the computer or other programmable data processing equipment to create a computer-executed process to create a computer or other programmable data processing equipment. It may also be possible for instructions to perform the processing equipment to provide steps for performing the functions described in the flowchart block(s).

Additionally, each block may represent a module, segment, or portion of code that includes one or more executable instructions for executing specified logical function(s). It should also be noted that in some alternative implementations it is also possible for the functions recited in the blocks to occur out of order. For example, two blocks shown one after another may in fact be performed substantially simultaneously, or it may be possible that the blocks are sometimes performed in a reverse order according to a corresponding function.

In this case, the term '~ unit' used in this embodiment means software or hardware components such as FPGA (Field Programmable Gate Array) or ASIC (Application Specific Integrated Circuit), and '~ unit' performs certain roles. do. However, '-part' is not limited to software or hardware. '~unit' may be configured to reside on an addressable storage medium or may be configured to refresh one or more processors. Accordingly, according to some embodiments, '~ part' refers to components such as software components, object-oriented software components, class components, and task components, processes, functions, properties, and programs. Includes procedures, subroutines, segments of program code, drivers, firmware, microcode, circuitry, data, databases, data structures, tables, arrays, and variables. The functions provided in the components and '~ units' may be combined into a smaller number of components and '~ units' or further separated into additional components and '~ units'. In addition, components and '~ units' may be implemented to play one or more CPUs in a device or secure multimedia card. Also, according to some embodiments, '~ unit' may include one or more processors.

Hereinafter, the operating principle of the present invention will be described in detail with reference to the accompanying drawings. In the following description of the present invention, if it is determined that a detailed description of a related well-known function or configuration may unnecessarily obscure the gist of the present invention, the detailed description thereof will be omitted. In addition, the terms described below are terms defined in consideration of functions in the present invention, which may vary according to intentions or customs of users and operators. Therefore, the definition should be made based on the content throughout this specification. Hereinafter, the base station is a subject performing resource allocation of the terminal, and may be at least one of a gNode B, an eNode B, a Node B, a base station (BS), a radio access unit, a base station controller, or a node on a network. The terminal may include a user equipment (UE), a mobile station (MS), a cellular phone, a smart phone, a computer, or a multimedia system capable of performing a communication function. Of course, it is not limited to the above example. Hereinafter, the present disclosure describes a technique for a terminal to receive broadcast information from a base station in a wireless communication system. The present disclosure relates to a communication technique that converges a 5 ^th generation (5G) communication system for supporting a higher data rate after the 4 ^th generation (4G) system with Internet of Things (IoT) technology, and a system thereof. The present disclosure provides intelligent services (eg, smart home, smart building, smart city, smart car or connected car, healthcare, digital education, retail business, security and safety related services, etc.) based on 5G communication technology and IoT-related technology. ) can be applied to

A term referring to broadcast information, a term referring to control information, a term related to communication coverage, a term referring to a state change (eg, an event), and network entities used in the following description Terms referring to, terms referring to messages, terms referring to components of an apparatus, and the like are exemplified for convenience of description. Accordingly, the present invention is not limited to the terms described below, and other terms having equivalent technical meanings may be used.

For convenience of description below, some terms and names defined in the 3rd generation partnership project long term evolution (3GPP LTE) standard may be used. However, the present invention is not limited by the above terms and names, and may be equally applied to systems conforming to other standards.

A wireless communication system, for example, 3GPP's HSPA (High Speed Packet Access), LTE (Long Term Evolution or E-UTRA (Evolved Universal Terrestrial Radio Access)), LTE-Advanced (LTE-A), LTE-Pro, 3GPP2 HRPD (High Rate Packet Data), UMB (Ultra Mobile Broadband), and IEEE 802.16e, such as communication standards such as broadband wireless broadband wireless providing high-speed, high-quality packet data service It is evolving into a communication system.

As a representative example of a broadband wireless communication system, in an LTE system, an Orthogonal Frequency Division Multiplexing (OFDM) scheme is adopted in a Downlink (DL), and Single Carrier Frequency Division Multiple Access (SC-FDMA) is used in an Uplink (UL). ) method is used. Uplink refers to a radio link in which a UE (User Equipment) or MS (Mobile Station) transmits data or control signals to a base station (eNode B, or base station (BS)). It means a wireless link that transmits data or control signals. The multiple access method as described above divides the data or control information of each user by allocating and operating the time-frequency resources to which data or control information is to be transmitted for each user so that they do not overlap each other, that is, orthogonality is established. .

As a future communication system after LTE, that is, the 5G communication system must be able to freely reflect various requirements of users and service providers, so services that satisfy various requirements must be supported. Services considered for the 5G communication system include Enhanced Mobile BroadBand (eMBB), Massive Machine Type Communication (mMTC), and Ultra Reliability Low Latency Communication (URLLC). etc.

According to some embodiments, the eMBB aims to provide a data transmission rate that is more improved than the data transmission rate supported by the existing LTE, LTE-A, or LTE-Pro. For example, in the 5G communication system, the eMBB should be able to provide a maximum data rate of 20 Gbps in the downlink and a maximum data rate of 10 Gbps in the uplink from the viewpoint of one base station. At the same time, it is necessary to provide an increased user perceived data rate of the terminal. In order to satisfy such a requirement, it is required to improve transmission/reception technology, including a more advanced multi-input multi-output (MIMO) transmission technology. In addition, it is possible to satisfy the data transmission speed required by the 5G communication system by using a frequency bandwidth wider than 20 MHz in a frequency band of 3-6 GHz or 6 GHz or more instead of the 2 GHz band used by the current LTE.

At the same time, mMTC is being considered to support application services such as the Internet of Things (IoT) in the 5G communication system. In order to efficiently provide the Internet of Things, mMTC may require large-scale terminal access support, improved terminal coverage, improved battery life, and reduced terminal cost in a cell. Since the Internet of Things is attached to various sensors and various devices to provide communication functions, it must be able to support a large number of terminals (eg, 1,000,000 terminals/km2) within a cell. In addition, since a terminal supporting mMTC is highly likely to be located in a shaded area not covered by a cell, such as the basement of a building, due to the nature of the service, it may require wider coverage compared to other services provided by the 5G communication system. A terminal supporting mMTC should be configured as a low-cost terminal, and since it is difficult to frequently exchange the battery of the terminal, a very long battery life time may be required.

Finally, in the case of URLLC, as a cellular-based wireless communication service used for a specific purpose (mission-critical), remote control for a robot or machine, industrial automation, As a service used in an unmaned aerial vehicle, remote health care, emergency alert, etc., it is necessary to provide communication that provides ultra-low latency and ultra-reliability. For example, a service supporting URLLC must satisfy an air interface latency of less than 0.5 milliseconds, and at the same time have a requirement of a packet error rate of 10-5 or less. Therefore, for a service supporting URLLC, the 5G system must provide a smaller transmit time interval (TTI) than other services, and at the same time, a design requirement for allocating a wide resource in a frequency band is required. However, the aforementioned mMTC, URLLC, and eMBB are only examples of different service types, and the service types to which the present disclosure is applied are not limited to the above-described examples.

The services considered in the above-mentioned 5G communication system should be provided by convergence with each other based on one framework. That is, for efficient resource management and control, it is preferable that each service is integrated and controlled and transmitted as a single system rather than being operated independently.

In addition, although the embodiment of the present invention is described below using LTE, LTE-A, LTE Pro, or NR system as an example, the embodiment of the present invention may be applied to other communication systems having a similar technical background or channel type. In addition, the embodiments of the present invention may be applied to other communication systems through some modifications within the scope of the present invention as judged by a person having skilled technical knowledge.

The present disclosure relates to a method and apparatus for reporting channel state information for increasing power saving efficiency of a terminal in a wireless communication system.

According to the present disclosure, when the terminal operates in the power saving mode in the wireless communication system, the power saving effect can be further improved by optimizing the channel state information reporting method accordingly.

Hereinafter, the frame structure of the 5G system will be described in more detail with reference to the drawings.

1 is a diagram illustrating a basic structure of a time-frequency domain of a mobile communication system according to an embodiment of the present disclosure.

Referring to FIG. 1 , in FIG. 1 , the horizontal axis represents the time domain, and the vertical axis represents the frequency domain. The basic unit of resources in the time and frequency domain is a resource element (RE, 1-01) as 1 OFDM (Orthogonal Frequency Division Multiplexing) symbol (1-02) on the time axis and 1 subcarrier on the frequency axis (Subcarrier) ( 1-03) can be defined. In the frequency domain, N_sc^RB (eg, 12) consecutive REs may constitute one resource block (Resource Block, RB, 1-04). In one embodiment, a plurality of OFDM symbols may constitute one subframe (One subframe, 1-10).

2 is a diagram for explaining a frame, subframe, and slot structure of a next-generation mobile communication system according to an embodiment of the present disclosure.

)=14). 1 서브프레임(2-01)은 하나 또는 다수 개의 슬롯(2-02, 2-03)으로 구성될 수 있으며, 1 서브프레임(2-01)당 슬롯(2-02, 2-03)의 개수는 부반송파 간격에 대한 설정 값 μ(2-04, 2-05)에 따라 다를 수 있다. Referring to FIG. 2 , one frame (Frame, 2-00) is composed of one or more subframes (Subframe, 2-01), and one subframe is composed of one or more slots (Slot, 2-02). can For example, one frame (2-00) may be defined as 10 ms. One subframe 2-01 may be defined as 1 ms, and in this case, one frame 2-00 may consist of a total of 10 subframes 2-01. One slot (2-02, 2-03) may be defined as 14 OFDM symbols (that is, the number of symbols per slot (

)=14). One subframe (2-01) may consist of one or a plurality of slots (2-02, 2-03), and the number of slots (2-02, 2-03) per one subframe (2-01) may be different depending on the set value μ(2-04, 2-05) for the subcarrier spacing.

)가 달라질 수 있고, 이에 따라 1 프레임 당 슬롯 수(

) 가 달라질 수 있다. 각 부반송파 간격 설정 μ에 따른

및

는 하기의 [표 1]과 같이 정의될 수 있다.In the example of FIG. 2 , a case of μ=0 (2-04) and a case of μ=1 (2-05) are illustrated as subcarrier spacing setting values. When μ = 0 (2-04), one subframe (2-01) may consist of one slot (2-02), and when μ = 1 (2-05), one subframe (2) -01) may be composed of two slots 2-03. That is, the number of slots per subframe (

) may vary, and accordingly, the number of slots per frame (

) may be different. According to each subcarrier spacing setting μ

and

may be defined as in [Table 1] below.

[Table 1]

In NR, one component carrier (CC) or serving cell may be configured with up to 250 or more RBs. Therefore, when the terminal always receives the entire serving cell bandwidth (serving cell bandwidth) like LTE, the power consumption of the terminal may be extreme, and in order to solve this, the base station sets one or more bandwidth parts (BWP) to the terminal Thus, it is possible to support the UE to change the reception area within the cell. In NR, the base station may set 'initial BWP', which is the bandwidth of CORESET #0 (or common search space, CSS), to the terminal through the MIB. Thereafter, the base station may set an initial BWP (first BWP) of the terminal through RRC signaling, and may notify at least one or more pieces of BWP configuration information that may be indicated through future downlink control information (DCI). Thereafter, the base station may indicate which band the terminal will use by announcing the BWP ID through DCI. If the UE does not receive DCI in the currently allocated BWP for a specific time or longer, the UE returns to the 'default BWP' and attempts to receive DCI.

3 illustrates an example of a configuration of a bandwidth part (BWP) in a wireless communication system according to an embodiment of the present disclosure.

Referring to FIG. 3 , FIG. 3 shows an example in which the terminal bandwidth 3-00 is set to two bandwidth parts, that is, a bandwidth part #1(3-05) and a bandwidth part #2(3-10). The base station may set one or more bandwidth parts to the terminal, and may set information as shown in [Table 2] below for each bandwidth part.

[Table 2]

Of course, it is not limited to the above-described example, and in addition to the above-described configuration information, various parameters related to the bandwidth portion may be set in the terminal. The above-described information may be transmitted by the base station to the terminal through higher layer signaling, for example, RRC signaling. At least one bandwidth part among the set one or a plurality of bandwidth parts may be activated. Whether to activate the set bandwidth portion may be semi-statically transmitted from the base station to the UE through RRC signaling, or may be dynamically transmitted through a MAC CE (control element) or DCI.

According to an embodiment, the terminal before the RRC (Radio Resource Control) connection may receive an initial bandwidth part (Initial BWP) for the initial connection from the base station through the MIB (Master Information Block). More specifically, in order for the terminal to receive system information (Remaining System Information; RMSI or System Information Block 1; may correspond to SIB1) necessary for initial access through the MIB in the initial access step, the PDCCH may be transmitted. It is possible to receive setting information for a control resource set (CORESET) and a search space (Search Space). The control region and the search space set by the MIB may be regarded as identifier (Identity, ID) 0, respectively.

The base station may notify the terminal of configuration information such as frequency allocation information, time allocation information, and numerology for the control region #0 through the MIB. In addition, the base station may notify the UE of configuration information on the monitoring period and occasion for the control region #0, that is, configuration information on the search space #0 through the MIB. The UE may regard the frequency domain set as the control region #0 obtained from the MIB as an initial bandwidth part for initial access. In this case, the identifier (ID) of the initial bandwidth part may be regarded as 0.

The setting of the bandwidth part supported by the above-described next-generation mobile communication system (5G or NR system) may be used for various purposes.

For example, when the bandwidth supported by the terminal is smaller than the system bandwidth, the bandwidth supported by the terminal may be supported by setting the bandwidth portion. For example, in <Table 2>, the frequency position (setting information 2) of the bandwidth part is set for the terminal, so that the terminal can transmit and receive data at a specific frequency position within the system bandwidth.

As another example, for the purpose of supporting different numerologies, the base station may configure a plurality of bandwidth portions for the terminal. For example, in order to support both data transmission and reception using a subcarrier interval of 15 kHz and a subcarrier interval of 30 kHz to an arbitrary terminal, two bandwidth portions may be set to use a subcarrier interval of 15 kHz and 30 kHz, respectively. Different bandwidth portions may be subjected to frequency division multiplexing (FDM), and when data is transmitted/received at a specific subcarrier interval, a bandwidth portion set for the corresponding subcarrier interval may be activated.

As another example, for the purpose of reducing power consumption of the terminal, the base station may configure a bandwidth portion having different sizes of bandwidths for the terminal. For example, if the terminal supports a very large bandwidth, for example, a bandwidth of 100 MHz and always transmits and receives data using the corresponding bandwidth, very large power consumption may be caused. In particular, it is very inefficient in terms of power consumption for the UE to monitor an unnecessary downlink control channel for a large bandwidth of 100 MHz in a situation in which there is no traffic. Therefore, for the purpose of reducing power consumption of the terminal, the base station may set a relatively small bandwidth portion for the terminal, for example, a bandwidth portion of 20 MHz. In the absence of traffic, the UE may perform a monitoring operation in the 20 MHz bandwidth portion, and when data is generated, it may transmit/receive data using the 100 MHz bandwidth portion according to the instruction of the base station.

In the above-described method of setting the bandwidth part, terminals before RRC connection (Connected) may receive configuration information for the initial bandwidth part through a master information block (MIB) in the initial connection step. More specifically, the UE can receive, from the MIB of the PBCH (Physical Broadcast Channel), a control region (Control Resource Set, CORESET) for a downlink control channel through which DCI scheduling a System Information Block (SIB) can be transmitted. have. The bandwidth of the control region set as the MIB may be regarded as an initial bandwidth part, and the terminal may receive the PDSCH through which the SIB is transmitted through the set initial bandwidth part. In addition to the purpose of receiving the SIB, the initial bandwidth part may be utilized for other system information (OSI), paging, and random access.

Hereinafter, an SS (Synchronization Signal)/PBCH block of a next-generation mobile communication system (5G or NR system) will be described.

The SS/PBCH block may mean a physical layer channel block composed of a primary SS (PSS), a secondary SS (SSS), and a PBCH. More specifically, the SS/PBCH block may be defined as follows.

- PSS: A signal serving as a reference for downlink time/frequency synchronization may provide some information on cell ID.

- SSS: serves as a reference for downlink time/frequency synchronization, and may provide the remaining cell ID information not provided by PSS. Additionally, it may serve as a reference signal for demodulation of the PBCH.

- PBCH: It is possible to provide essential system information necessary for transmitting and receiving the data channel and control channel of the terminal. The essential system information may include search space-related control information indicating radio resource mapping information of a control channel, scheduling control information on a separate data channel for transmitting system information, and the like.

- SS/PBCH block: The SS/PBCH block may consist of a combination of PSS, SSS, and PBCH. One or a plurality of SS/PBCH blocks may be transmitted within 5 ms, and each transmitted SS/PBCH block may be distinguished by an index.

The UE may detect the PSS and SSS in the initial access phase and may decode the PBCH. The UE may acquire the MIB from the PBCH, and may receive the control region #0 configured through the MIB. The UE may perform monitoring on the control region #0, assuming that the selected SS/PBCH block and the DMRS (Reference Signal) transmitted in the control region #0 are QCL (Quasi Co Location). System information may be received through downlink control information transmitted in region #0. The UE may obtain RACH (Random Access Channel) related configuration information necessary for initial access from the received system information. In consideration of the PBCH index, PRACH (Physical RACH) may be transmitted to the base station, and the base station receiving the PRACH may obtain information about the SS/PBCH block index selected by the UE. It can be seen that a certain block is selected from among them, and the UE monitors the control region #0 corresponding to (or related to) the selected SS/PBCH block.

Hereinafter, downlink control information (hereinafter referred to as DCI) in a next-generation mobile communication system (5G or NR system) will be described in detail.

Uplink data (or Physical Uplink Shared Channel, PUSCH) or downlink data (or Physical Downlink Shared Channel, PDSCH) in a next-generation mobile communication system (5G or NR system)) Scheduling information may be transmitted from the base station to the terminal through DCI. The UE may monitor the DCI format for fallback and the DCI format for non-fallback for PUSCH or PDSCH. The fallback DCI format may consist of a fixed field predetermined between the base station and the terminal, and the non-fallback DCI format may include a configurable field.

DCI may be transmitted through a physical downlink control channel (PDCCH), which is a physical downlink control channel, through channel coding and modulation. A cyclic redundancy check (CRC) may be attached to the DCI message payload, and the CRC may be scrambled with a Radio Network Temporary Identifier (RNTI) corresponding to the identity of the UE. Depending on the purpose of the DCI message, for example, UE-specific data transmission, power control command, or random access response, different RNTIs may be used for scrambling of the CRC attached to the payload of the DCI message. That is, the RNTI may not be explicitly transmitted but may be transmitted while being included in the CRC calculation process. When the DCI message transmitted on the PDCCH is received, the UE may check the CRC using the allocated RNTI. If the CRC check result is correct, the terminal can know that the corresponding message has been transmitted to the terminal.

For example, DCI scheduling PDSCH for system information (SI) may be scrambled with SI-RNTI. DCI scheduling a PDSCH for a random access response (RAR) message may be scrambled with an RA-RNTI. DCI scheduling a PDSCH for a paging message may be scrambled with a P-RNTI. DCI notifying SFI (Slot Format Indicator) may be scrambled with SFI-RNTI. DCI notifying Transmit Power Control (TPC) may be scrambled with TPC-RNTI. DCI for scheduling UE-specific PDSCH or PUSCH may be scrambled with C-RNTI (Cell RNTI).

DCI format 0_0 may be used as a fallback DCI for scheduling PUSCH, and in this case, CRC may be scrambled with C-RNTI. In an embodiment, DCI format 0_0 in which CRC is scrambled with C-RNTI may include information as shown in [Table 3] below.

[Table 3]

DCI format 0_1 may be used as a non-fallback DCI for scheduling PUSCH, and in this case, CRC may be scrambled with C-RNTI. In an embodiment, DCI format 0_1 in which CRC is scrambled with C-RNTI may include information as shown in [Table 4] below.

[Table 4]

DCI format 1_0 may be used as a fallback DCI for scheduling PDSCH, and in this case, CRC may be scrambled with C-RNTI. In an embodiment, DCI format 1_0 in which CRC is scrambled with C-RNTI may include information as shown in [Table 5] below.

[Table 5]

Alternatively, DCI format 1_0 may be used as DCI for scheduling PDSCH for RAR message, and in this case, CRC may be scrambled with RA-RNTI. DCI format 1_0 in which CRC is scrambled with C-RNTI may include information as shown in [Table 6] below.

[Table 6]

DCI format 1_1 may be used as a non-fallback DCI for scheduling PDSCH, and in this case, CRC may be scrambled with C-RNTI. In an embodiment, DCI format 1_1 in which CRC is scrambled with C-RNTI may include information as shown in [Table 7] below.

[Table 7]

4 is a diagram for explaining the setting of a control region of a downlink control channel of a next-generation mobile communication system according to an embodiment of the present disclosure. That is, FIG. 4 is a diagram illustrating an embodiment of a control region (Control Resource Set, CORESET) in which a downlink control channel is transmitted in a 5G wireless communication system according to an embodiment of the present disclosure.

Referring to FIG. 4, FIG. 4 shows two control regions (control region #1 (4-01) within 1 slot (4-20) on the time axis and the UE bandwidth part (4-10) on the frequency axis. ), control area #2 (4-02)) is set. The control regions 4-01 and 4-02 may be set in a specific frequency resource 4-03 within the entire terminal bandwidth part 4-10 on the frequency axis. The control regions 4-01 and 4-02 may be set with one or a plurality of OFDM symbols on the time axis, which may be defined as a control region length (Control Resource Set Duration, 4-04). Referring to FIG. 4 , the control region #1 (4-01) may be set to a control region length of 2 symbols, and the control region #2 (4-02) may be set to a control region length of 1 symbol.

In the control region in the above-described next-generation mobile communication system (5G or NR system), the base station provides upper layer signaling (eg, system information, MIB (Master Information Block), RRC (Radio Resource Control) signaling) to the terminal. can be set by Setting the control region to the terminal means providing information such as the control region identifier (Identity), the frequency position of the control region, and the symbol length of the control region. For example, the setting of the control area may include information as shown in [Table 8] below.

[Table 8]

In [Table 8], tci-StatesPDCCH (hereinafter referred to as 'TCI state') configuration information is one or more SS (Synchronization) in a QCL (Quasi Co Located) relationship with DMRS (Demodulation Reference Signal) transmitted in the corresponding control region. Signal)/Physical Broadcast Channel (PBCH) block index or CSI-RS (Channel State Information Reference Signal) index information.

In a wireless communication system, one or more different antenna ports (or one or more channels, signals, and combinations thereof may be replaced, but in the description of the present disclosure in the future, for convenience, different antenna ports are collectively referred to) They may be associated with each other by QCL settings as shown in [Table 9] below.

[Table 9]

Specifically, the QCL setting can connect two different antenna ports in a relationship between a (QCL) target antenna port and a (QCL) reference antenna port, and the terminal can perform statistical characteristics (e.g., For example, all or part of the large scale parameters of the channel such as Doppler shift, Doppler spread, average delay, delay spread, average gain, and spatial Rx (or Tx) parameters or the reception spatial filter coefficient or transmission spatial filter coefficient of the terminal) are set to the target antenna port. It can be applied (or assumed) upon reception. In the above, the target antenna port refers to an antenna port for transmitting a channel or signal set by a higher layer setting including the QCL setting, or an antenna port for transmitting a channel or signal to which a TCI state indicating the QCL setting is applied. . In the above, the reference antenna port means an antenna port for transmitting a channel or signal indicated (specific) by the referenceSignal parameter in the QCL configuration.

Specifically, the statistical characteristics of the channel defined by the QCL setting (indicated by the parameter qcl-Type in the QCL setting) may be classified according to the QCL type as follows.

○ 'QCL-TypeA': {Doppler shift, Doppler spread, average delay, delay spread}

○ 'QCL-TypeB': {Doppler shift, Doppler spread}

○ 'QCL-TypeC': {Doppler shift, average delay}

○ 'QCL-TypeD': {Spatial Rx parameter}

At this time, the types of QCL type are not limited to the above four types, but all possible combinations are not listed in order not to obscure the gist of the description. In the above, QCL-TypeA indicates that the bandwidth and transmission period of the target antenna port are both sufficient compared to the reference antenna port (that is, the number of samples and the transmission band/time of the target antenna port on both the frequency axis and the time axis are the number of samples and transmission of the reference antenna port. More than band/time) This is a QCL type used when all statistical properties that can be measured in frequency and time axis can be referenced. QCL-TypeB is a QCL type used when the bandwidth of the target antenna port is sufficient to measure measurable statistical characteristics on the frequency axis, that is, Doppler shift and Doppler spreads. QCL-TypeC is a QCL type used when the bandwidth and transmission period of the target antenna port are insufficient to measure second-order statistics, that is, Doppler spread and delay spreads, so that only first-order statistics, that is, Doppler shift, average delay can be referred to. . QCL-TypeD is a QCL type set when spatial reception filter values used when receiving a reference antenna port can be used when receiving a target antenna port.

Meanwhile, the base station can set or instruct up to two QCL settings to one target antenna port through the TCI state setting as follows.

Among the two QCL settings included in one TCI state setting, the first QCL setting may be set to one of QCL-TypeA, QCL-TypeB, and QCL-TypeC. In this case, the settable QCL type is specified according to the types of the target antenna port and the reference antenna port, and will be described in detail below. In addition, the second QCL setting among the two QCL settings included in the one TCI state setting may be set to QCL-TypeD, and may be omitted in some cases.

Tables 9-1 to 9-5 below are tables showing valid TCI state settings according to target antenna port types.

Table 9-1 shows the valid TCI state configuration when the target antenna port is CSI-RS for tracking (TRS). The TRS refers to an NZP CSI-RS in which a repetition parameter is not set among CSI-RSs and trs-Info is set to true. In the case of setting 3 in Table 9-1, it can be used for aperiodic TRS.

[Table 9-1] Valid TCI state setting when target antenna port is CSI-RS for tracking (TRS)

Table 9-2 shows the valid TCI state configuration when the target antenna port is CSI-RS for CSI. The CSI-RS for CSI means an NZP CSI-RS in which the repetition parameter is not set and trs-Info is not set to true among the CSI-RSs.

[Table 9-2] Valid TCI state setting when the target antenna port is CSI-RS for CSI

Table 9-3 shows a valid TCI state configuration when the target antenna port is CSI-RS for beam management (BM, the same meaning as CSI-RS for L1 RSRP reporting). The CSI-RS for BM means an NZP CSI-RS in which a repetition parameter is set among CSI-RSs, has a value of On or Off, and trs-Info is not set to true.

[Table 9-3] Valid TCI state configuration when the target antenna port is CSI-RS for BM (for L1 RSRP reporting)

Table 9-4 shows the valid TCI state configuration when the target antenna port is a PDCCH DMRS.

[Table 9-4] Valid TCI state setting when target antenna port is PDCCH DMRS

Table 9-5 shows a valid TCI state configuration when the target antenna port is a PDSCH DMRS.

[Table 9-5] Valid TCI state setting when target antenna port is PDSCH DMRS

In the representative QCL setting method according to Tables 9-1 to 9-5, the target antenna port and the reference antenna port for each step are set to "SSB" -> "TRS" -> "CSI-RS for CSI, or CSI-RS for BM. , or PDCCH DMRS, or PDSCH DMRS". Through this, it is possible to help the reception operation of the terminal by linking the statistical characteristics that can be measured from the SSB and the TRS to each antenna port.

5 is a diagram for explaining the structure of a downlink control channel of a next-generation mobile communication system according to an embodiment of the present disclosure. That is, FIG. 5 is a diagram illustrating an example of a basic unit of time and frequency resources constituting a downlink control channel that can be used in 5G according to an embodiment of the present disclosure.

Referring to FIG. 5 , a basic unit of time and frequency resources constituting a control channel may be defined as a resource element group (REG) 5-03. The REG (5-03) may be defined as 1 OFDM symbol (5-01) on the time axis and 1 PRB (Physical Resource Block, 5-02) on the frequency axis, that is, 12 subcarriers. The base station may configure a downlink control channel allocation unit by concatenating REGs 5-03.

As shown in FIG. 5, when a basic unit to which a downlink control channel is allocated in 5G is referred to as a Control Channel Element (CCE, 5-04), one CCE (5-04) includes a plurality of REGs (5-03). can be composed of For example, REG (5-03) shown in FIG. 5 may consist of 12 REs, and if 1 CCE (5-04) is composed of 6 REGs (5-03), 1 CCE (5-04) ) may consist of 72 REs. When a downlink control region is set, the corresponding region may be composed of a plurality of CCEs 5-04, and a specific downlink control channel may have one or a plurality of CCEs 5 according to an aggregation level (AL) in the control region. -04) can be mapped and transmitted. The CCEs 5-04 in the control region are divided by numbers, and in this case, the numbers of the CCEs 5-04 may be assigned according to a logical mapping method.

The basic unit of the downlink control channel shown in FIG. 5, that is, the REG (5-03), includes both REs to which DCI is mapped and a region to which DMRS (5-05), which is a reference signal for decoding it, is mapped. have. As shown in FIG. 5, three DMRSs 5-05 may be transmitted in one REG 5-03. The number of CCEs required to transmit the PDCCH may be 1, 2, 4, 8, or 16 according to an aggregation level (AL), and the number of different CCEs is the link adaptation of the downlink control channel. can be used to implement For example, when AL=L, one downlink control channel may be transmitted through L CCEs.

The UE needs to detect a signal without knowing the information on the downlink control channel. For blind decoding, a search space representing a set of CCEs may be defined. The search space is a set of downlink control channel candidates consisting of CCEs that the UE should attempt to decode on a given aggregation level. Since there are various aggregation levels that make one bundle with 1, 2, 4, 8, and 16 CCEs, the UE may have a plurality of search spaces. A search space set may be defined as a set of search spaces in all set aggregation levels.

The search space may be classified into a common search space and a UE-specific search space. According to an embodiment of the present disclosure, a group of terminals or all terminals may search the common search space of the PDCCH in order to receive cell-common control information, such as a dynamic scheduling for system information or a paging message.

For example, the UE may receive PDSCH scheduling assignment information for transmission of the SIB including the operator information of the cell by examining the common search space of the PDCCH. In the case of the common search space, since terminals of a certain group or all terminals need to receive the PDCCH, the common search space may be defined as a set of predefined CCEs. Meanwhile, the UE may receive scheduling allocation information for UE-specific PDSCH or PUSCH by examining UE-specific search space of PDCCH. The UE-specific search space may be UE-specifically defined as a function of the UE's identity and various system parameters.

In 5G, the parameter for the search space for the PDCCH may be set from the base station to the terminal through higher layer signaling (eg, SIB, MIB, RRC signaling). For example, the base station is the number of PDCCH candidates in each aggregation level L, the monitoring period for the search space, the monitoring occasion in symbol units in the slot for the search space, the search space type (common search space or terminal-specific search space), A combination of a DCI format and an RNTI to be monitored in the corresponding search space, a control region index to be monitored in the search space, etc. may be set to the UE. For example, the above-described setting may include information as shown in [Table 10] below.

[Table 10]

Based on the configuration information, the base station may configure one or a plurality of search space sets for the terminal. According to an embodiment of the present disclosure, the base station may set the search space set 1 and the search space set 2 to the terminal, and the DCI format A scrambled with X-RNTI in the search space set 1 may be configured to be monitored in the common search space. and DCI format B scrambled with Y-RNTI in search space set 2 may be configured to be monitored in a UE-specific search space.

According to the configuration information, one or a plurality of search space sets may exist in the common search space or the terminal-specific search space. For example, the search space set #1 and the search space set #2 may be set as the common search space, and the search space set #3 and the search space set #4 may be set as the terminal-specific search space.

The common search space may be classified into a specific type of search space set according to a purpose. An RNTI to be monitored may be different for each type of a determined search space set. For example, the common search space type, purpose, and RNTI to be monitored can be classified as follows.

Meanwhile, in the common search space, a combination of the following DCI format and RNTI may be monitored. Of course, it is not limited to the following examples.

- DCI format 0_0/1_0 with CRC scrambled by C-RNTI, CS-RNTI, SP-CSI-RNTI, RA-RNTI, TC-RNTI, P-RNTI, SI-RNTI

- DCI format 2_0 with CRC scrambled by SFI-RNTI

- DCI format 2_1 with CRC scrambled by INT-RNTI

- DCI format 2_2 with CRC scrambled by TPC-PUSCH-RNTI, TPC-PUCCH-RNTI

- DCI format 2_3 with CRC scrambled by TPC-SRS-RNTI

In the UE-specific search space, a combination of the following DCI format and RNTI may be monitored. Of course, it is not limited to the following examples.

- DCI format 0_0/1_0 with CRC scrambled by C-RNTI, CS-RNTI, TC-RNTI

- DCI format 1_0/1_1 with CRC scrambled by C-RNTI, CS-RNTI, TC-RNTI

The specified RNTIs may follow the following definitions and uses.

C-RNTI (Cell RNTI): UE-specific PDSCH scheduling purpose

TC-RNTI (Temporary Cell RNTI): UE-specific PDSCH scheduling purpose

CS-RNTI (Configured Scheduling RNTI): Semi-statically configured UE-specific PDSCH scheduling purpose

RA-RNTI (Random Access RNTI): Used for scheduling PDSCH in the random access phase

P-RNTI (Paging RNTI): PDSCH scheduling purpose for which paging is transmitted

SI-RNTI (System Information RNTI): Used for scheduling PDSCH in which system information is transmitted

INT-RNTI (Interruption RNTI): Used to indicate whether PDSCH is pucturing

TPC-PUSCH-RNTI (Transmit Power Control for PUSCH RNTI): Used to indicate power control command for PUSCH

TPC-PUCCH-RNTI (Transmit Power Control for PUCCH RNTI): Used to indicate power control command for PUCCH

TPC-SRS-RNTI (Transmit Power Control for SRS RNTI): Used to indicate power control command for SRS

In an embodiment, the above-described DCI formats may be defined as shown in [Table 11] below.

[Table 11]

According to an embodiment of the present disclosure, in 5G, a plurality of search space sets may be set with different parameters (eg, parameters of [Table 10]). Accordingly, the set of search space sets monitored by the terminal at every time point may be different. For example, if the search space set #1 is set to the X-slot period, the search space set #2 is set to the Y-slot period and X and Y are different, the UE searches with the search space set #1 in a specific slot. Both space set #2 can be monitored, and one of search space set #1 and search space set #2 can be monitored in a specific slot.

When a plurality of search space sets are configured for the terminal, the following conditions may be considered in order to determine the search space set to be monitored by the terminal.

[Condition 1: Limit the maximum number of PDCCH candidates]

The number of PDCCH candidates that can be monitored per slot may not exceed M ^μ . M ^μ may be defined as the maximum number of PDCCH candidates per slot in a cell set to a subcarrier interval of 15·2 ^μ kHz, and may be defined as shown in [Table 12] below.

[Table 12]

[Condition 2: Limit the maximum number of CCEs]

The number of CCEs constituting the entire search space per slot (here, the total search space may mean the entire CCE set corresponding to a union region of a plurality of search space sets) may not exceed C ^μ . C ^μ may be defined as the maximum number of CCEs per slot in a cell set to a subcarrier interval of 15·2 ^μ kHz, and may be defined as shown in [Table 13] below.

[Table 13]

For convenience of description, a situation in which both conditions 1 and 2 are satisfied at a specific time point may be exemplarily defined as “condition A”. Accordingly, not satisfying condition A may mean not satisfying at least one of conditions 1 and 2 described above.

According to the setting of the search space sets of the base station, the condition A may not be satisfied at a specific time point. If condition A is not satisfied at a specific time point, the UE may select and monitor only some of the search space sets configured to satisfy condition A at the corresponding time point, and the base station may transmit the PDCCH to the selected search space set.

According to an embodiment of the present disclosure, the following method may be followed as a method of selecting a partial search space from among all set search space sets.

If condition A for PDCCH is not satisfied at a specific time point (slot),

The terminal (or the base station) may preferentially select a search space set in which a search space type is set as a common search space from among search space sets existing at a corresponding time, over a search space set set as a terminal-specific search space.

When all search space sets set as the common search space are selected (that is, condition A is satisfied even after selecting all search spaces set as the common search space), the terminal (or the base station) uses the terminal-specific search space You can select search space sets set to . In this case, when there are a plurality of search space sets set as the terminal-specific search space, a search space set having a low search space set index may have a higher priority. Considering the priority, the terminal or the base station may select terminal-specific search space sets within a range in which condition A is satisfied.

Methods of allocating time and frequency resources for data transmission in NR are described below.

In NR, the following detailed frequency domain resource allocation (FD-RA) methods may be provided in addition to frequency-axis resource candidate allocation through BWP indication.

6 is a diagram illustrating an example of PDSCH frequency axis resource allocation in a wireless communication system according to an embodiment of the present disclosure.

6 shows three frequency axis resource allocation methods of type 0 (6-00), type 1 (6-05), and dynamic switch (6-10) configurable through a higher layer in NR It is a drawing.

Referring to FIG. 6 , if the UE is configured to use only resource type 0 through higher layer signaling (6-00), some downlink control information (DCI) for allocating PDSCH to the UE is a bit composed of NRBG bits. have a map The conditions for this will be described again later. At this time, NRBG means the number of RBGs (resource block groups) determined as shown in [Table 14] below according to the BWP size allocated by the BWP indicator and the upper layer parameter rbg-Size, according to the bitmap. Data is transmitted to the RBG indicated by 1.

[Table 14]

개의 비트들로 구성되는 주파수 축 자원 할당 정보를 가진다. 이를 위한 조건은 차후 다시 설명된다. 기지국은 이를 통하여 starting VRB(6-20)와 이로부터 연속적으로 할당되는 주파수 축 자원의 길이(6-25)를 설정할 수 있다.If the UE is configured to use only resource type 1 through higher layer signaling (6-05), some DCI for allocating PDSCH to the UE is

It has frequency axis resource allocation information composed of bits. Conditions for this will be described again later. Through this, the base station can set the starting VRB (6-20) and the length (6-25) of frequency axis resources continuously allocated therefrom.

If the UE is configured to use both resource type 0 and resource type 1 through higher layer signaling (6-10), some DCI for allocating PDSCH to the UE is payload for setting resource type 0 (6-15) And it has frequency axis resource allocation information consisting of bits of a larger value (6-35) among payloads (6-20, 6-25) for setting resource type 1. Conditions for this will be described again later. At this time, one bit may be added to the first part (MSB) of the frequency axis resource allocation information in DCI, and when the bit is 0, it indicates that resource type 0 is used, and when it is 1, it indicates that resource type 1 is used. can be

Hereinafter, a method of allocating time domain resources for a data channel in a next-generation mobile communication system (5G or NR system) will be described.

The base station provides a table for time domain resource allocation information for a downlink data channel (Physical Downlink Shared Channel, PDSCH) and an uplink data channel (Physical Uplink Shared Channel, PUSCH) to the terminal, and higher layer signaling (e.g. For example, RRC signaling) can be set. For PDSCH, a table including maxNrofDL-Allocations=16 entries may be configured, and for PUSCH, a table configured with maxNrofUL-Allocations=16 entries may be configured. In one embodiment, the time domain resource allocation information includes the PDCCH-to-PDSCH slot timing (corresponding to the time interval in slot units between the time when the PDCCH is received and the time when the PDSCH scheduled by the received PDCCH is transmitted, denoted by K0. ), PDCCH-to-PUSCH slot timing (corresponding to the time interval in slot units between the time when the PDCCH is received and the time when the PUSCH scheduled by the received PDCCH is transmitted, denoted by K2), the PDSCH or PUSCH within the slot Information on the position and length of the scheduled start symbol, a mapping type of PDSCH or PUSCH, etc. may be included. For example, information such as [Table 15] or [Table 15-1] below may be notified from the base station to the terminal.

[Table 15]

[Table 15-1]

The base station may notify one of the entries in the table for the above-described time domain resource allocation information to the terminal through L1 signaling (eg, DCI) (eg, to be indicated by the 'time domain resource allocation' field in DCI) can). The UE may acquire time domain resource allocation information for the PDSCH or PUSCH based on the DCI received from the base station.

7 is a diagram illustrating an example of physical downlink shared channel (PDSCH) time axis resource allocation in a wireless communication system according to an embodiment of the present disclosure.

,

), 스케줄링 오프셋(scheduling offset)(K₀) 값, 그리고 DCI를 통하여 동적으로 지시되는 한 slot 내 OFDM symbol 시작 위치(7-00)와 길이(7-05)에 따라 PDSCH 자원의 시간 축 위치를 지시할 수 있다. Referring to FIG. 7 , the base station has a subcarrier spacing (SCS) of a data channel and a control channel configured using a higher layer (

,

), a scheduling offset (K ₀ ) value, and an OFDM symbol start position (7-00) and length (7-05) in one slot dynamically indicated through DCI. The time axis position of the PDSCH resource can direct

8 is a diagram illustrating an example of time axis resource allocation according to subcarrier intervals of a data channel and a control channel in a wireless communication system according to an embodiment of the present disclosure.

), 데이터와 제어를 위한 슬롯 번호(slot number)가 같으므로, 기지국 및 단말은 미리 정해진 슬롯 오프셋(slot offset) K₀에 맞추어, 스케줄링 오프셋(scheduling offset)이 발생하는 것을 알 수 있다. 반면, 데이터 채널 및 제어 채널의 서브캐리어 간격이 다른 경우 (8-05,

), 데이터와 제어를 위한 슬롯 번호(slot number)가 다르므로, 기지국 및 단말은 PDCCH의 서브캐리어 간격을 기준으로 하여, 미리 정해진 슬롯 오프셋(slot offset) K₀에 맞추어 스케줄링 오프셋(scheduling offset)이 발생하는 것을 알 수 있다.Referring to FIG. 8, when the subcarrier spacing of the data channel and the control channel are the same (8-00,

), data and a slot number for control are the same, so that the base station and the terminal can know that a scheduling offset occurs in accordance with a predetermined slot offset K ₀ . On the other hand, when the subcarrier spacing of the data channel and the control channel are different (8-05,

), since the slot numbers for data and control are different, the base station and the terminal are based on the subcarrier interval of the PDCCH, and the scheduling offset is set according to a predetermined slot offset K ₀ . can be seen to occur.

In NR, the UE transmits uplink control information (UCI) to the base station through a physical uplink control channel (PUCCH). The control information includes HARQ-ACK indicating whether or not demodulation/decoding is successful for a transport block (TB) received by the UE through the PDSCH, and an SR (scheduling request) for the UE to request resource allocation to the PUSCH base station for uplink data transmission. ) and channel state information (CSI), which is information for reporting the channel state of the terminal, may be included.

The PUCCH resource can be largely divided into a long PUCCH and a short PUCCH according to the length of an allocated symbol. In NR, a long PUCCH has a length of 4 symbols or more in a slot, and a short PUCCH has a length of 2 symbols or less in a slot.

To describe the Long PUCCH in more detail, the long PUCCH may be used for the purpose of improving uplink cell coverage, and thus may be transmitted in a DFT-S-OFDM scheme that is a single carrier transmission rather than OFDM transmission. Long PUCCH supports transport formats such as PUCCH format 1, PUCCH format 3, and PUCCH format 4 according to the number of supportable control information bits and whether UE multiplexing is supported through Pre-DFT OCC support in the front end of the IFFT.

First, PUCCH format 1 is a DFT-S-OFDM-based long PUCCH format capable of supporting up to 2 bits of control information, and uses 1 RB of frequency resources. The control information may be composed of a combination or each of HARQ-ACK and SR. In PUCCH format 1, an OFDM symbol including a DeModulation Reference Signal (DMRS) that is a demodulation reference signal (or reference signal) and an OFDM symbol including UCI are repeatedly configured.

For example, if the number of transmission symbols in PUCCH format 1 is 8 symbols, it consists of DMRS symbols, UCI symbols, DMRS symbols, UCI symbols, DMRS symbols, UCI symbols, DMRS symbols, and UCI symbols in order from the first start symbol of 8 symbols. will become The DMRS symbol is spread using an orthogonal code (or orthogonal sequence or spreading code, w_i(m)) on the time axis in a sequence corresponding to a length of 1 RB on the frequency axis within one OFDM symbol, and is transmitted after performing IFFT .

The UCI symbol is generated as follows. The terminal generates d(0) by modulating 1-bit control information with BPSK and 2-bit control information with QPSK, and multiplying the generated d(0) with a sequence corresponding to the length of 1 RB on the frequency axis for scrambling, and scrambled The sequence is spread using an orthogonal code (or an orthogonal sequence or a spreading code, w _i(m) ) on the time axis and transmitted after performing IFFT.

The terminal generates the sequence based on the group hopping or sequence hopping configuration received from the base station as the upper signal and the set ID, and cyclic shifts the generated sequence with the initial cyclic shift (CS) value set as the upper signal to have a length of 1 RB Create a sequence corresponding to

와 같이 결정되며, 구체적으로 다음 [표 16]와 같이 주어진다. i는 스프레딩 부호 그 자체의 인덱스를 의미하며, m은 스프레딩 부호의 element들의 인덱스를 의미한다. 여기서 [표 16] 내에 [ ]안의 숫자들은

을 의미하며, 가령 스프레딩 부호의 길이가 2이고, 설정된 스프레딩 부호의 인덱스 i=0인 경우, 스프레딩 부호 w_i(m)은

,

이 되어서 w_i(m)=[1 1]이 된다.w _i(m) is the length of the spreading code (N _SF ) given

It is determined as follows, and is specifically given as follows [Table 16]. i means the index of the spreading code itself, and m means the index of elements of the spreading code. Here, the numbers in [ ] in [Table 16] are

means, for example, when the length of the spreading code is 2 and the index i = 0 of the set spreading code, the spreading code w _i(m) is

,

Thus, w _i(m) = [1 1].

[Table 16]

Next, PUCCH format 3 is a DFT-S-OFDM-based long PUCCH format that can support more than 2 bits of control information, and the number of RBs used can be set through a higher layer. The control information may be composed of a combination or each of HARQ-ACK, SR, and CSI. In PUCCH format 3, the DMRS symbol position is presented in the following [Table 17] according to whether frequency hopping within the slot and whether additional DMRS symbols are configured.

[Table 17]

For example, when the number of transmission symbols of PUCCH format 3 is 8, the DMRS is transmitted to the 1st symbol and the 5th symbol by starting the first start symbol of the 8 symbols with 0. The above table is also applied to the DMRS symbol position of PUCCH format 4 in the same manner.

Next, PUCCH format 4 is a DFT-S-OFDM-based long PUCCH format capable of supporting more than 2 bits of control information, and uses 1 RB of frequency resources. The control information may be composed of a combination or each of HARQ-ACK, SR, and CSI. The difference between PUCCH format 4 and PUCCH format 3 is that PUCCH format 4 can multiplex PUCCH format 4 of multiple terminals within one RB. It is possible to multiplex PUCCH format 4 of multiple terminals by applying Pre-DFT OCC to control information at the front end of the IFFT. However, the number of transmittable control information symbols of one terminal is reduced according to the number of multiplexed terminals. The number of multiplexable terminals, that is, the number of different available OCCs may be 2 or 4, and the number of OCCs and an OCC index to be applied may be set through a higher layer.

Next, the short PUCCH will be described. The Short PUCCH may be transmitted in both a downlink centric slot and an uplink centric slot, and in general, the last symbol of the slot or an OFDM symbol at the rear (eg, the last OFDM symbol or It is transmitted in the second-to-last OFDM symbol, or the last two OFDM symbols). Of course, it is also possible to transmit the Short PUCCH at any position within the slot. And the Short PUCCH may be transmitted using one OFDM symbol or two OFDM symbols. Short PUCCH can be used to reduce delay time compared to long PUCCH in a situation in which uplink cell coverage is good, and is transmitted in a CP-OFDM scheme.

Short PUCCH supports transport formats such as PUCCH format 0 and PUCCH format 2 according to the number of supportable control information bits. First, PUCCH format 0 is a short PUCCH format capable of supporting up to 2 bits of control information, and uses 1 RB of frequency resources. The control information may be composed of a combination or each of HARQ-ACK and SR. PUCCH format 0 has a structure in which only a sequence mapped to 12 subcarriers is transmitted on the frequency axis within one OFDM symbol without transmitting DMRS. The terminal generates a sequence based on the group hopping or sequence hopping configuration and the set ID set as the upper signal from the base station, and adds a different CS value depending on whether ACK or NACK is ACK or NACK to the indicated initial CS (cyclic shift) value. , the generated sequence is cyclic shifted to be mapped to 12 subcarriers and transmitted.

For example, if HARQ-ACK is 1 bit, as shown in Table 18 below, if ACK is ACK, 6 is added to the initial CS value to generate a final CS, and if it is NACK, 0 is added to the initial CS to generate a final CS. The CS value 0 for NACK and 6 CS value for ACK are defined in the standard, and the UE always generates PUCCH format 0 according to the value and transmits 1-bit HARQ-ACK.

[Table 18]

For example, when HARQ-ACK is 2 bits, 0 is added to the initial CS value if (NACK, NACK) is (NACK, NACK) as in the following [Table 19], and 3 is added to the initial CS value if (NACK, ACK), and (ACK, ACK) ), 6 is added to the initial CS value, and 9 is added to the initial CS value when it is (ACK, NACK). A CS value of 0 for (NACK, NACK), a CS value of 3 for (NACK, ACK), 6 a CS value for (ACK, ACK), and a CS value of 9 for (ACK, NACK) are defined in the standard , the UE always generates PUCCH format 0 according to the above value and transmits a 2-bit HARQ-ACK.

When the final CS value exceeds 12 due to the CS value added according to ACK or NACK to the initial CS value, since the length of the sequence is 12, modulo 12 is applied to the final CS value.

[Table 19]

Next, PUCCH format 2 is a short PUCCH format supporting more than 2 bits of control information, and the number of RBs used can be set through a higher layer. The control information may be composed of a combination or each of HARQ-ACK, SR, and CSI. PUCCH format 2 has indices of #1, #4, #7, and #10 when the position of the subcarrier on which the DMRS is transmitted within one OFDM symbol is the index of the first subcarrier as #0 as shown in FIG. 414. fixed to the subcarrier. Control information is mapped to the remaining subcarriers except for the subcarrier in which the DMRS is located through a modulation process after channel encoding.

In summary, the settable values and ranges for each of the above-described PUCCH formats can be summarized as shown in Table 20 below. In the case where the value does not need to be set in the following table, it is indicated as N.A.

[Table 20]

Meanwhile, in order to improve uplink coverage, multi-slot repetition may be supported for PUCCH formats 1, 3, and 4, and PUCCH repetition may be set for each PUCCH format.

The UE repeatedly transmits PUCCH including UCI as many as the number of slots configured through nrofSlots, which is higher layer signaling. For repeated PUCCH transmission, PUCCH transmission of each slot is performed using the same number of consecutive symbols and the number of corresponding consecutive symbols is higher layer signaling PUCCH-format1 or PUCCH-format3 or PUCCH-format4 Through nrofSymbols in can be set. For repeated PUCCH transmission, PUCCH transmission of each slot is performed using the same start symbol, and the corresponding start symbol may be set through the startingSymbolIndex in higher layer signaling, PUCCH-format1 or PUCCH-format3 or PUCCH-format4.

For repeated PUCCH transmission, if the UE is configured to perform frequency hopping in PUCCH transmission in different slots, the UE performs frequency hopping in units of slots. In addition, if the UE is configured to perform frequency hopping in PUCCH transmission in different slots, the UE starts PUCCH transmission from the first PRB index configured through startingPRB, which is higher layer signaling, in an even-numbered slot, In the second slot, PUCCH transmission starts from the second PRB index configured through secondHopPRB, which is higher layer signaling.

Additionally, if the UE is configured to perform frequency hopping in PUCCH transmission in different slots, the index of the slot in which the first PUCCH transmission is indicated to the UE is 0, and during the set total number of repeated PUCCH transmissions, each slot In , the value of the number of repeated PUCCH transmissions is increased regardless of PUCCH transmission performance. If the UE is configured to perform frequency hopping in PUCCH transmission in different slots, the UE does not expect that frequency hopping is configured in the slot during PUCCH transmission. If the UE is not configured to perform frequency hopping in PUCCH transmission in different slots and is configured to perform frequency hopping in a slot, the first and second PRB indexes are equally applied in the slot.

Next, the PUCCH resource configuration of the base station or the terminal will be described. The base station can configure PUCCH resources for each BWP through a higher layer for a specific terminal. The corresponding setting may be as follows [Table 21].

[Table 21]

According to the table, one or a plurality of PUCCH resource sets in the PUCCH resource configuration for a specific BWP may be configured, and a maximum payload value for UCI transmission may be configured in some of the PUCCH resource sets. One or more PUCCH resources may belong to each PUCCH resource set, and each PUCCH resource may belong to one of the above-described PUCCH formats.

With respect to the PUCCH resource set, the first PUCCH resource set may have a maximum payload value fixed to a predetermined number of bits (eg, 2 bits), and thus the value may not be separately set through an upper layer, etc. . If the remaining PUCCH resource set is configured, the index of the corresponding PUCCH resource set may be set in ascending order according to the maximum payload value, and the maximum payload value may not be set in the last PUCCH resource set. The upper layer configuration for the PUCCH resource set may be as follows [Table 22].

[Table 22]

The resourceList parameter of the table may include IDs of PUCCH resources belonging to the PUCCH resource set.

If the PUCCH resource set is not set at the time of initial access or when the PUCCH resource set is not set, the PUCCH resource set as shown in Table 23 below, which is composed of a plurality of cell-specific PUCCH resources in the initial BWP, may be used. The PUCCH resource to be used for initial access in this PUCCH resource set may be indicated through SIB1.

[Table 23]

The maximum payload of each PUCCH resource included in the PUCCH resource set may be 2 bits in the case of PUCCH format 0 or 1, and in the case of the remaining formats, it may be determined by the symbol length, the number of PRBs, and the maximum code rate. The above-described symbol length and number of PRBs may be set for each PUCCH resource, and the maximum code rate may be set for each PUCCH format.

Next, PUCCH resource selection for UCI transmission will be described. In the case of SR transmission, the PUCCH resource for the SR corresponding to the schedulingRequestID may be configured through a higher layer as shown in the following [Table 24]. The PUCCH resource may be a resource belonging to PUCCH format 0 or PUCCH format 1.

[Table 24]

In the configured PUCCH resource, a transmission period and an offset are set through the periodicityAndOffset parameter of [Table 24]. If there is uplink data to be transmitted by the terminal at a time point corresponding to the set period and offset, the corresponding PUCCH resource is transmitted; otherwise, the corresponding PUCCH resource may not be transmitted.

In the case of CSI transmission, a PUCCH resource for transmitting a periodic or semi-persistent CSI report through PUCCH may be set in the pucch-CSI-ResourceList parameter as shown in Table 25 below as higher signaling. The parameter includes a list of PUCCH resources for each BWP for a cell or CC to transmit the corresponding CSI report. The PUCCH resource may be a resource belonging to PUCCH format 2 or PUCCH format 3 or PUCCH format 4.

[Table 25]

For the PUCCH resource, the transmission period and offset are set through reportSlotConfig of [Table 25].

In the case of HARQ-ACK transmission, the resource set of the PUCCH resource to be transmitted is first selected according to the payload of the UCI including the corresponding HARQ-ACK. That is, a PUCCH resource set having a minimum payload that is not smaller than the UCI payload is selected. Next, the PUCCH resource in the PUCCH resource set can be selected through the PUCCH resource indicator (PRI) in the DCI scheduling the TB corresponding to the HARQ-ACK, and the PRI is the PUCCH specified in [Table 5] or [Table 6]. It may be a resource indicator. The relationship between the PRI configured as upper signaling and the PUCCH resource selected from the PUCCH resource set may be as follows [Table 26].

[Table 26]

If the number of PUCCH resources in the selected PUCCH resource set is greater than 8, the PUCCH resource may be selected by the following equation.

[Equation 1]

는 PUCCH resource set 내 선택된 PUCCH resource의 인덱스,

는 PUCCH resource set에 속한 PUCCH resource의 개수,

는 PRI 값,

는 수신 DCI가 속한 CORESET p의 총 CCE 수,

는 수신 DCI에 대한 첫번째 CCE 인덱스를 가리킨다.in the above formula

is the index of the selected PUCCH resource in the PUCCH resource set,

is the number of PUCCH resources belonging to the PUCCH resource set,

is the PRI value,

is the total number of CCEs in CORESET p to which the receiving DCI belongs,

indicates the first CCE index for the received DCI.

슬롯 이후이다. 상기

값의 후보는 상위 레이어로 설정되며, 보다 구체적으로 [표 21]에 명시된 PUCCH-Config 내 dl-DataToUL-ACK 파라미터에 설정된다. 이들 후보 중 하나의

값이 상기 TB를 스케줄하는 DCI 내 PDSCH-to-HARQ feedback timing indicator에 의해 선택될 수 있으며 이 값은 상기 [표 5] 또는 [표 6]에 명시된 값일 수 있다. 한편, 상기

값의 단위는 슬롯 단위이거나 서브슬롯 단위일 수 있다. 여기서 서브슬롯이란 슬롯보다 작은 길이의 단위로서 하나 또는 복수개의 심볼이 하나의 서브슬롯을 구성할 수 있다.The time at which the PUCCH resource is transmitted is from the TB transmission corresponding to the HARQ-ACK.

after the slot. remind

The value candidate is set in the upper layer, and more specifically, it is set in the dl-DataToUL-ACK parameter in PUCCH-Config specified in [Table 21]. one of these candidates

A value may be selected by the PDSCH-to-HARQ feedback timing indicator in DCI for scheduling the TB, and this value may be a value specified in [Table 5] or [Table 6]. On the other hand, the

The unit of the value may be a slot unit or a subslot unit. Here, a subslot is a unit having a length smaller than that of a slot, and one or a plurality of symbols may constitute one subslot.

Next, a case in which two or more PUCCH resources are located in one slot will be described. The UE can transmit UCI through one or two PUCCH resources in one slot or subslot, and when UCI is transmitted through two PUCCH resources in one slot/subslot i) Each PUCCH resource does not overlap in symbol units, ii) At least one PUCCH resource may be a short PUCCH. Meanwhile, the UE may not expect to transmit a plurality of PUCCH resources for HARQ-ACK transmission within one slot.

Next, the PUCCH transmission procedure when two or more PUCCH resources overlap will be described. When two or more PUCCH resources overlap, one of the overlapping PUCCH resources is selected or a new PUCCH resource is selected according to the above-described conditions, that is, the transmitted PUCCH resource should not overlap in symbol units. In addition, the UCI payload transmitted through the overlapping PUCCH resource is all multiplexed and transmitted, or some may be dropped. First, look at the case where multi-slot repetition is not set in the PUCCH resource (case 1) and the case where multi-slot repetition (case 2) is set.

The case of overlapping PUCCH resources with respect to Case 1 is divided into Case 1-1) the case where two or more PUCCH resources overlap for HARQ-ACK transmission and Case 1-2) the remaining cases.

A case corresponding to Case 1-1) is shown in FIG. 9 .

값(9-50, 9-51)에 대응하는 상향링크 슬롯이 동일한 경우, 해당 PDCCH에 대응하는 PUCCH resource들은 서로 overlap된다고 볼 수 있다. 9 is a diagram illustrating a case in which a plurality of PUCCH resources overlap for HARQ-ACK transmission for PDSCH when multi-slot repetition is not set according to an embodiment of the present disclosure. 9, with respect to two or more different PDCCHs (9-10, 9-11) for scheduling PDSCH, if the transmission slot of the PUCCH resource corresponding to each PDCCH is the same, the corresponding PUCCH resource overlaps each other. can see. That is, indicated by multiple PDCCHs

When the uplink slots corresponding to the values (9-50, 9-51) are the same, the PUCCH resources corresponding to the corresponding PDCCH can be considered to overlap each other.

At this time, among the PUCCH resources indicated by the PRIs (9-40, 9-41) in the PDCCH, the PUCCH resource selected based on the PRI (9-41) corresponding to the PDCCH (9-11) transmitted at the latest time point Only (9-31) is selected and HARQ-ACK information is transmitted on the PUCCH resource. Therefore, HARQ-ACK information for PDSCH (9-21) through the selected PUCCH resource (9-31), the PUCCH resource (9-31) and HARQ-ACK information for other PUCCH (9-30) overlapping all is transmitted after being encoded by a predefined HARQ-ACK codebook.

Next, corresponding to Case 1-2), when a PUCCH resource for HARQ-ACK transmission and a PUCCH resource for SR and/or CSI transmission overlap, or a plurality of PUCCH resources for SR and/or CSI transmission overlap case is explained. In the above case, it is defined that the PUCCH resource overlaps when a plurality of PUCCH resources transmitted in the same slot overlap one or more symbols on the time axis, and whether multiplexing of UCIs within these resources can be arranged as follows [Table 27].

[Table 27]

According to the table, if the HARQ-ACK overlaps between the transmitted PUCCH resource, or if the SR and CSI overlap between the transmitted PUCCH, these UCIs are always multiplexed.

On the other hand, when each PUCCH resource through which the SR and HARQ-ACK are transmitted overlaps, that is, in the case of Case 1-2-1, whether UCI multiplexing is divided according to the format of the PUCCH resource is divided as follows.

- SR on PUCCH format 0 + HARQ-ACK on PUCCH format 1: SR is dropped and only HARQ-ACK is transmitted

- For the rest: both SR and HARQ-ACK are multiplexed

In addition, in the remaining cases corresponding to Case 1-2-2, that is, if the HARQ-ACK and the PUCCH resource through which the CSI is transmitted overlap or overlap between the plurality of PUCCH resources through which the CSI is transmitted, the multiplexing of these UCIs is higher You can follow the layer settings. In addition, setting whether to multiplex HARQ-ACK and CSI and whether to multiplex between a plurality of CSIs can be independently made.

For example, whether HARQ-ACK and CSI are multiplexed may be set through simultaneousHARQ-ACK-CSI parameters for each PUCCH format 2, 3, and 4, and the corresponding parameters may all be set to the same value for the PUCCH format. If it is set so that multiplexing is not performed through the parameter, only HARQ-ACK is transmitted and overlapping CSI may be dropped. In addition, whether multiple CSIs are multiplexed may be configured through a multi-CSI-PUCCH-ResourceList parameter in PUCCH-Config. That is, when the multi-CSI-PUCCH-ResourceList parameter is set, inter-CSI multiplexing may be performed. Otherwise, only the PUCCH corresponding to the CSI having a high priority may be transmitted according to the inter-CSI priority.

When UCI multiplexing is performed as described above, the selection method and multiplexing method of the PUCCH resource to transmit the corresponding UCI resource may vary depending on the overlapped UCI information and the format of the PUCCH resource, which can be summarized as follows [Table 28]. can

[Table 28]

Each option in the table is as follows.

- Option 1: The terminal selects the PUCCH resource differently according to the SR value of the SR PUCCH resource overlapped with the HARQ-ACK PUCCH resource. That is, if the SR value is positive, the PUCCH resource for SR is selected, and if the SR value is negative, the PUCCH resource for HARQ-ACK is selected. Transmits HARQ-ACK information to the selected PUCCH resource.

- Option 2: The UE multiplexes HARQ-ACK information and SR information to a PUCCH resource for HARQ-ACK transmission and transmits it.

- Option 3: The UE multiplexes SR information and CSI on a PUCCH resource for CSI transmission and transmits it.

- Option 4: PUCCH resource transmission for overlapping between HARQ-ACK - Detailed operation described in case 1-1) above.

- Option 5: PUCCH resource for HARQ-ACK corresponding to the PDSCH scheduled by PDCCH and PUCCH resource for CSI transmission overlap, and when multiplexing between HARQ-ACK and CSI is set to the upper layer, the terminal is for HARQ-ACK The PUCCH resource is transmitted by multiplexing HARQ-ACK information and CSI information.

- Option 6: PUCCH resource for HARQ-ACK corresponding to SPS (semi-persistent scheduling) PDSCH and PUCCH resource for CSI transmission overlap, and when multiplexing between HARQ-ACK and CSI is set to the upper layer, the UE transmits CSI HARQ-ACK information and CSI information are multiplexed to the PUCCH resource for transmission.

If the PUCCH resource list for multiplexing to the upper layer, that is, multi-CSI-PUCCH-ResourceList is configured, the UE selects one resource having the lowest index that can transmit all the multiplexed UCI payloads among the resources in the list, and then UCI send the payload. If there is no resource capable of transmitting all of the multiplexed UCI payloads in the list, the UE selects the resource with the largest index and then transmits HARQ-ACK and transmittable CSI reports to the corresponding resource.

- Option 7: When a plurality of PUCCH resources for CSI transmission overlap and multiplexing between a plurality of CSIs is set to a higher layer, the UE is a PUCCH resource list for CSI multiplexing set to an upper layer, that is, within the multi-CSI-PUCCH-ResourceList. After selecting one resource having the lowest index that can transmit all the multiplexed UCI payloads, the UCI payload is transmitted. If there is no resource capable of transmitting all of the multiplexed UCI payloads in the list, the UE selects the resource with the largest index and transmits as many CSI reports as possible to the resource.

In the above, for the convenience of the technology, two PUCCH resources overlapped, but focused on the case, but even if three or more PUCCH resources overlap, the method can be similarly applied. For example, if the SR+HARQ-ACK multiplexed PUCCH resource and CSI PUCCH resource overlap, the HARQ-ACK and CSI multiplexing method may be followed.

If it is set not to perform multiplexing between specific UCIs, UCIs having high priorities are transmitted according to the priorities in the order of HARQ-ACK > SR > CSI, and UCIs having low priorities may be dropped. When a plurality of CSI PUCCH resources are set not to perform multiplexing when overlapping, the PUCCH corresponding to the CSI having a higher priority is transmitted and the PUCCH corresponding to the other CSI may be dropped.

Next, Case 2, that is, when multi-slot repetition is set, is divided into Case 2-1) a case in which two or more PUCCH resources for HARQ-ACK transmission are located in the same starting slot and Case 2-2) the remaining cases. Each case is shown in FIG. 10 .

10 is a diagram illustrating a case in which the PUCCH resource overlaps when multi-slot repetition is set according to an embodiment of the present disclosure.

으로 지시되는 두 PUCCH의 시작 슬롯이 동일하다면 Case 1-1)과 동일하게 단일 PUCCH resource (한 슬롯에서 가장 나중 시점에 전송되는 PUCCH), 즉 PUCCH #2가 선택될 수 있다. 따라서, 해당 PUCCH에는 PDSCH #1및 PDSCH #2에 상응하는 HARQ-ACK 정보가 HARQ-ACK 코드북을 통해 모두 멀티플렉싱되어 전송된다. Referring to Case 2-1), when multi-slot repetition is set in the PUCCH resource for HARQ-ACK, that is, PUCCH #1 is repeatedly transmitted over multiple slots (10-30, 10-40) and PUCCH #2 is also In case of repeated transmission (10-31, 10-41) over multiple slots,

If the start slots of the two PUCCHs indicated by are the same as in Case 1-1), a single PUCCH resource (PUCCH transmitted at the latest time in one slot), that is, PUCCH #2 may be selected. Accordingly, HARQ-ACK information corresponding to PDSCH #1 and PDSCH #2 is all multiplexed through the HARQ-ACK codebook and transmitted to the corresponding PUCCH.

For the convenience of technology, a case in which a plurality of PUCCHs that are multi-slot repetition overlap is taken as an example, but the same method can also be applied when overlapping between the PUCCH that is multi-slot repetition and the PUCCH transmitted in a single slot.

Case 2-2) corresponds to a case where a symbol unit overlap occurs between PUCCH for HARQ-ACK transmission and PUCCH for SR or CSI transmission, or between PUCCH for multiple SR or CSI transmission. That is, when PUCCH #1 is repeatedly transmitted over multiple slots (10-50, 10-51) and PUCCH #2 is also repeatedly transmitted over multiple slots (10-60, 10-61), PUCCH #1 and PUCCH # 2 corresponds to the case where more than one symbol overlap occurs in one slot (10-70).

Between PUCCHs where one or more symbols overlap in the corresponding slot (10-70), the priorities between UCIs in the PUCCH are compared, and the UCI with higher priority is transmitted, and other UCIs are dropped from the corresponding slot. In this case, the inter-UCI priority follows HARQ-ACK > SR > CSI in the highest order.

In addition, when a plurality of CSI PUCCH resources overlap, the PUCCH corresponding to the CSI having a higher priority is transmitted, and the PUCCH corresponding to the other CSI may be dropped in the corresponding slot. PUCCH transmission or drop according to the above-mentioned priority is performed only in the slot in which the symbol unit overlap occurs, and is not performed in other slots. That is, the PUCCH in which multi-slot repetition is set may be dropped in the slot in which the symbol unit overlap occurs, but may be transmitted as configured in the remaining slots.

In this case, for the convenience of technology, a case in which a plurality of PUCCHs that are multi-slot repetition overlap is taken as an example, but the same method may also be applied if the PUCCH that is multi-slot repetition overlaps between the PUCCH transmitted in a single slot and the PUCCH.

의 반복 전송 중 첫 번째 슬롯에서 PUCCH 전송을 하고, 두 번째 슬롯에서 PUSCH 전송을 하며, PUCCH 전송이 1개 또는 복수 개의 슬롯에서 PUSCH 전송과 overlap되는 경우, 또한 overlap된 슬롯들에서 PUSCH 내에 UCI들이 multiplexing된 경우, PUCCH와 PUSCH가 overlap된 슬롯들에서 PUCCH는 전송하고 PUSCH는 전송하지 않는다.In addition, the overlap between PUCCH and PUSCH transmission will be described. If the terminal

During repeated transmission of PUCCH transmission in the first slot, PUSCH transmission in the second slot, when PUCCH transmission overlaps with PUSCH transmission in one or a plurality of slots, UCIs in PUSCH in overlapping slots are multiplexing In the case where the PUCCH and the PUSCH overlap, the PUCCH is transmitted and the PUSCH is not transmitted.

In the single slot transmission and multi-slot repetition of the PUCCH, the above-described slot for a low-delay service such as URLLC may be replaced with a mini-slot and used. A mini-slot has a shorter length on the time axis than a slot, and one mini-slot can consist of fewer than 14 symbols. For example, 2 or 7 symbols can constitute one mini-slot. When a mini-slot is configured through a higher layer, etc., units such as the HARQ-ACK feedback timing K1 value and the number of repeated transmissions may be replaced by mini-slot units in the existing slot. The mini-slot configuration may be applied to all PUCCH transmissions or may be limited to PUCCH transmission for a specific service. For example, transmission in units of slots may be applied to PUCCH for eMBB service, whereas transmission in units of mini-slot may be applied to PUCCH for URLLC service.

Next, beam configuration to be applied to PUCCH transmission will be described. If the terminal does not have a terminal-specific configuration (dedicated PUCCH resource configuration) for the PUCCH resource configuration, the PUCCH resource set is provided through upper signaling, pucch-ResourceCommon, and in this case, the beam configuration for PUCCH transmission is Random Access Resoponse (RAR) Follows the beam configuration used in PUSCH transmission scheduled through the UL grant. If the UE has a UE-specific configuration (dedicated PUCCH resource configuration) for PUCCH resource configuration, beam configuration for PUCCH transmission is provided through the higher signaling pucch-spatialRelationInfoId shown in [Table 29] above. If the UE is configured with one pucch-spatialRelationInfoId, beam configuration for PUCCH transmission of the UE is provided through one pucch-spatialRelationInfoId. If the terminal receives a plurality of pucch-spatialRelationInfoIDs configured, the terminal is instructed to activate one of the plurality of pucch-spatialRelationInfoIDs through a MAC CE (control element). The UE may receive up to 8 pucch-spatialRelationInfoIDs configured through higher level signaling, and may be instructed to activate only one pucch-spatialRelationInfoID among them.

슬롯 이후 처음 등장하는 슬롯부터 MAC CE를 통한 pucch-spatialRelationInfoID 활성화를 적용하게 된다. 상기의

는 PUCCH 전송에 적용되는 뉴머롤로지이고,

는 주어진 뉴머롤로지에서 서브프레임 당 슬롯의 개수를 의미한다. pucch-spatialRelationInfo에 대한 상위 레이어 구성은 다음 [표 29]와 같을 수 있다. pucch-spatialRelationInfo는 PUCCH 빔 정보와 혼용될 수 있다.When the UE is instructed to activate any pucch-spatialRelationInfoID through the MAC CE, the UE transmits the MAC CE including activation information for the pucch-spatialRelationInfoID from the slot for HARQ-ACK transmission for the PDSCH.

From the first slot that appears after the slot, pucch-spatialRelationInfoID activation through MAC CE is applied. above

is a numerology applied to PUCCH transmission,

denotes the number of slots per subframe in a given numerology. The upper layer configuration for pucch-spatialRelationInfo may be as follows [Table 29]. pucch-spatialRelationInfo may be mixed with PUCCH beam information.

[Table 29]

According to [Table 29], one referenceSignal configuration may exist in a specific pucch-spatialRelationInfo configuration, and the referenceSignal is an ssb-Index indicating a specific SS/PBCH, or a csi-RS-Index indicating a specific CSI-RS, or , or srs indicating a specific SRS. If the referenceSignal is set to ssb-Index, the UE sets the beam used when receiving the SS/PBCH corresponding to the ssb-Index among the SS/PBCHs in the same serving cell as the beam for PUCCH transmission, or if the servingCellId is provided A beam used when receiving an SS/PBCH corresponding to ssb-Index among SS/PBCHs in the cell indicated by the servingCellId may be set as a beam for pucch transmission. If the referenceSignal is set to csi-RS-Index, the UE sets the beam used when receiving the CSI-RS corresponding to the csi-RS-Index among the CSI-RSs in the same serving cell as the beam for PUCCH transmission, or If the servingCellId is provided, the beam used when receiving the CSI-RS corresponding to the csi-RS-Index among the CSI-RSs in the cell indicated by the servingCellId can be set as the beam for pucch transmission. If the referenceSignal is set to srs, the UE sets the transmission beam used when transmitting the SRS corresponding to the resource index provided as a higher signaling resource in the same serving cell and/or in the activated uplink BWP as the beam for PUCCH transmission. Alternatively, if servingCellID and/or uplinkBWP are provided, the transmission beam used when transmitting the SRS corresponding to the resource index provided through the upper signaling resource in the cell and/or uplink BWP indicated by the servingCellID and/or uplinkBWP is used for PUCCH transmission. It can be set as a beam for

One pucch-PathlossReferenceRS-Id setting may exist within a specific pucch-spatialRelationInfo setting. PUCCH-PathlossReferenceRS of [Table 30] can be mapped with pucch-PathlossReferenceRS-Id of [Table 29], and up to four can be set through pathlossReferenceRSs in the upper signaling PUCCH-PowerControl of [Table 30]. PUCCH-PathlossReferenceRS is configured with ssb-Index when connected to SS/PBCH through the referenceSignal of Table 30, and is configured with csi-RS-Index when connected to CSI-RS.

[Table 30]

During uplink transmission of the terminal, when it is switched from the transmit OFF state to the transmit ON state, a transition time may be required to satisfy the transmission power requirement of the ON state. In addition, when switching from the transmit ON state to the transmit OFF state, a transition time may be required to satisfy the transmit power requirement in the OFF state. Alternatively, a transition time may be required even when transmission power is changed in the transmit ON state, transmission RB is changed, or hopping occurs.

Meanwhile, in LTE and NR, the terminal may perform a procedure of reporting UE capability supported by the terminal to the corresponding base station while connected to the serving base station. Hereinafter, this is referred to as UE capability (reporting). The base station may transmit a message (eg, UE capability enquiry message) for requesting UE capability report to the terminal in the connected state. The message may include a UE capability report request for each radio access technology (RAT) type of the base station. The UE capability report request for each RAT type may include frequency band information for requesting UE capability of the terminal.

In this case, the RAT type may include, for example, nr, eutra-nr, eutra, and the like. The base station may include information indicating at least one of nr, eutra-nr, and eutra to request a UE capability report of the terminal. In addition, the UE may report the UE capability to the eNB including information indicating at least one of nr, eutra-nr, and eutra for RAT types that the UE can support.

For example, when the RAT type included in the UE capability enquiry message indicates nr, a UE supporting NR-based wireless communication indicates nr in a message (eg, UE capability information message) reporting UE capability. UE capability may be reported, including the RAT type.

As another example, when the RAT type included in the UE capability enquiry message indicates eutra-nr, (NG)EN-DC (E-UTRA NR dual connectivity (covering E-UTRA connected to EPC or 5GC)) Alternatively, the UE supporting NR E-UTRA dual connectivity (NE-DC) reports UE capability including the RAT type indicating eutra-nr in a message (eg, UE capability information message) reporting UE capability. can

In addition, the UE capability enquiry message may request a UE capability report for a plurality of RAT types through one RRC message container. Alternatively, the base station may include a UE capability enquiry message including a UE capability report request for each RAT type in one RRC message a plurality of times and transmit it to the terminal. For example, a UE receiving an RRC message including a plurality of UE capability enquiry messages may configure a UE capability information message corresponding to each UE capability report request and report (transmit) it to the base station multiple times.

In the next-generation mobile communication system, a UE capability request for multi-radio dual connectivity (MR-DC) including NR, LTE, E-UTRA - NR dual connectivity (EN-DC) may be performed. The UE capability enquiry message is generally sent initially after the UE establishes a connection, but may be requested by the base station when necessary based on an arbitrary condition.

Upon receiving the UE capability report request from the base station (or receiving the UE capability enquiry message), the terminal may configure UE capability according to the RAT type and band information requested from the base station. Hereinafter, a method for the UE to configure UE capability in the NR system will be described.

Step 1. If the terminal receives a list of at least one band among LTE and NR through the UE capability report request from the base station, the terminal can configure a band combination (BC) for EN-DC and NR stand alone (SA). have. For example, based on the bands that have requested UE capability report through list information (eg, FreqBandList) included in the UE capability enquiry message received from the base station, the UE selects the BC candidate list for EN-DC and NR SA. configurable. In addition, the priorities of the bands may have priorities in the order described in the FreqBandList.

Step 2. If the base station requests the UE capability report by setting the "eutra-nr-only" flag or the "eutra" flag in the message requesting the UE capability report, the terminal requests NR SA BCs from the BC candidate list configured in step 1. BC for can be removed. Alternatively, this operation may occur only when an LTE base station (eNB) requests “eutra” capability.

Step 3. The UE may remove fallback BCs from the candidate list of BCs configured in the above step. Here, fallback BC may mean BC in which a band corresponding to at least one secondary cell (SCell) is removed from a certain super set BC. Since the super set BC can already cover the fallback BC, the fallback BC can be omitted. Step 3 may also be applied to multi-RAT dual connectivity (MR-DC). For example, LTE bands may also be applied. BCs remaining after step 3 may be referred to as "final candidate BC list".

Step 4. The UE may select BCs to be reported by selecting BCs corresponding to the requested RAT type from the "final candidate BC list". In step 4, the UE may configure a list (eg, supportedBandCombinationList) including the BCs selected by the UE in order. For example, the UE may configure BC and UE capability to be reported according to the preset RAT-Type order. (eg nr -> eutra-nr -> eutra).

In steps 1 to 4, the terminal may configure a featureSetCombination for each BC included in the configured supportedBandCombinationList, and configure a list (eg, featureSetCombinations) including each featureSetCombination. In this case, the featureSetCombination may mean a set of feature sets for each band within the selected BC, and the feature set may mean a set of capabilities supported by the UE in carriers within a specific band.

In addition, the UE may compare each BC and each BC feature set combination with respect to the supportedBandCombinationList. At this time, a specific BC, eg, BC #X, includes all the bands of BC, eg BC #Y, to be compared, and the feature set combination of BC #X is the same or higher than the feature set combination of BC #Y. If configured, BC #Y may be defined as a fallback BC of BC #X. After finding all fallback BCs in the band combination list according to the above-described comparison process, a new BC list from which all the fallback BCs are removed is constructed, and a list of “candidate feature set combinations” for each of these BCs is constructed. can The "candidate feature set combination" may include both feature set combinations for NR and EUTRA-NR BC, and may be configured based on the feature set combination of UE-NR-Capabilities and UE-MRDC-Capabilities containers. .

Step 5. If the RAT Type requested from the base station is eutra-nr, featureSetCombinations may be included in two containers: UE-MRDC-Capabilities and UE-NR-Capabilities. However, the NR feature set may include only UE-NR-Capabilities.

However, the above-described steps are merely examples and are not limited thereto. Accordingly, according to an embodiment of the present disclosure, some steps may be omitted or other steps may be added.

After the UE capability is configured, the terminal may transmit a UE capability information message including the UE capability to the base station. The base station may perform scheduling and transmission/reception management to the terminal based on the UE capability information received from the terminal.

11 is a diagram illustrating a structure of a base station and a terminal radio protocol when performing single cell, carrier aggregation, and dual connectivity according to an embodiment of the present disclosure.

11, the radio protocol of the next-generation mobile communication system is NR SDAP (Service Data Adaptation Protocol 1125, 1170), NR PDCP (Packet Data Convergence Protocol 1130, 1165), NR RLC ( Radio Link Control 1135, 1160) and NR MAC (Medium Access Control 1140, 1155) may be configured.

The main functions of the NR SDAPs 1125 and 1170 may include some of the following functions.

- transfer of user plane data

- Mapping between a QoS flow and a DRB for both DL and UL for uplink and downlink

- Marking QoS flow ID in both DL and UL packets for uplink and downlink

- A function of mapping a relective QoS flow to a data bearer for uplink SDAP PDUs (reflective QoS flow to DRB mapping for the UL SDAP PDUs).

For the SDAP layer device, the UE can receive the RRC message to determine whether to use the header of the SDAP layer device or whether to use the function of the SDAP layer device for each PDCP layer device, for each bearer, or for each logical channel, and the SDAP header When is set, the terminal uses the NAS QoS reflection setting 1-bit indicator (NAS reflective QoS) and the AS QoS reflection setting 1-bit indicator (AS reflective QoS) of the SDAP header to determine the uplink and downlink QoS flows and mapping information for the data bearer. can be instructed to update or reset The SDAP header may include QoS flow ID information indicating QoS. The QoS information may be used as data processing priority and scheduling information to support a smooth service.

The main functions of the NR PDCPs 1130 and 1165 may include some of the following functions.

- Header compression and decompression (ROHC only)

- Transfer of user data

- In-sequence delivery of upper layer PDUs

- Out-of-sequence delivery of upper layer PDUs

- Reordering function (PDCP PDU reordering for reception)

- Duplicate detection of lower layer SDUs

- Retransmission of PDCP SDUs

- Ciphering and deciphering

- Timer-based SDU discard in uplink.

In the above, the reordering function of the NR PDCP device refers to a function of reordering PDCP PDUs received from a lower layer in order based on a PDCP sequence number (SN), and a function of delivering data to a higher layer in the reordered order may include, or may include a function of directly delivering without considering the order, may include a function of reordering the order to record the lost PDCP PDUs, and report the status of the lost PDCP PDUs It may include a function for the transmitting side, and may include a function for requesting retransmission for lost PDCP PDUs.

The main functions of the NR RLCs 1135 and 1160 may include some of the following functions.

- Data transfer function (Transfer of upper layer PDUs)

- In-sequence delivery of upper layer PDUs

- Out-of-sequence delivery of upper layer PDUs

- ARQ function (Error Correction through ARQ)

- Concatenation, segmentation and reassembly of RLC SDUs

- Re-segmentation of RLC data PDUs

- Reordering of RLC data PDUs

- Duplicate detection

- Protocol error detection

- RLC SDU discard function (RLC SDU discard)

- RLC re-establishment function

In the above, the in-sequence delivery function of the NR RLC device refers to a function of sequentially delivering RLC SDUs received from a lower layer to an upper layer, and one RLC SDU is originally divided into several RLC SDUs and received If it is, it may include a function of reassembling it and delivering it, and may include a function of rearranging the received RLC PDUs based on an RLC sequence number (SN) or PDCP SN (sequence number), and rearranging the order May include a function of recording the lost RLC PDUs, may include a function of reporting a status on the lost RLC PDUs to the transmitting side, and may include a function of requesting retransmission for the lost RLC PDUs. and, when there is a lost RLC SDU, it may include a function of sequentially delivering only RLC SDUs before the lost RLC SDU to the upper layer, or even if there is a lost RLC SDU, if a predetermined timer has expired It may include a function of sequentially delivering all RLC SDUs received before the start of RLC to the upper layer, or if a predetermined timer expires even if there are lost RLC SDUs, all RLC SDUs received so far are sequentially transferred to the upper layer. It may include a function to transmit. In addition, the RLC PDUs may be processed in the order in which they are received (in the order of arrival, regardless of the sequence number and sequence number) and delivered to the PDCP device out of sequence (out-of sequence delivery). Segments stored in the buffer or to be received later are received, reconstructed into one complete RLC PDU, processed, and delivered to the PDCP device. The NR RLC layer may not include a concatenation function, and the function may be performed by the NR MAC layer or replaced with a multiplexing function of the NR MAC layer.

In the above, the out-of-sequence delivery function of the NR RLC device refers to a function of directly delivering RLC SDUs received from a lower layer to a higher layer regardless of order, and one RLC SDU originally has several RLCs. When received after being divided into SDUs, it may include a function of reassembling and delivering it, and may include a function of storing the RLC SN or PDCP SN of the received RLC PDUs, arranging the order, and recording the lost RLC PDUs. can

The NR MACs 1140 and 1155 may be connected to several NR RLC layer devices configured in one terminal, and the main function of the NR MAC may include some of the following functions.

- Mapping between logical channels and transport channels

- Multiplexing/demultiplexing of MAC SDUs

- Scheduling information reporting function

- HARQ function (Error correction through HARQ)

- Priority handling between logical channels of one UE

- Priority handling between UEs by means of dynamic scheduling

- MBMS service identification

- Transport format selection

- Padding function (Padding)

The NR PHY layers 1145 and 1150 channel-code and modulate the upper layer data, make an OFDM symbol and transmit it to the radio channel, or demodulate the OFDM symbol received through the radio channel, decode the channel, and deliver the operation to the upper layer. can be done

The detailed structure of the radio protocol structure may be variously changed according to a carrier (or cell) operating method. For example, when the base station transmits data to the terminal based on a single carrier (or cell), the base station and the terminal use a protocol structure having a single structure for each layer, such as S00. On the other hand, when the base station transmits data to the terminal based on CA (carrier aggregation) using multiple carriers in a single TRP, the base station and the terminal have a single structure up to RLC like S10, but a protocol for multiplexing the PHY layer through the MAC layer structure will be used. As another example, when the base station transmits data to the terminal based on DC (dual connectivity) using multiple carriers in multiple TRP, the base station and the terminal have a single structure up to RLC as in S20, but the PHY layer through the MAC layer. A protocol structure for multiplexing is used.

Referring to the above-described PUCCH-related descriptions, in the current Rel-15 NR, for PUCCH transmission, a single cell or/and a single transmission point or/and a single panel or/and a single beam or/and a single transmission direction are focused on transmission. . For convenience in the following description of the present disclosure, a cell, transmission point, panel, beam or / and a transmission direction and the like are unified and described as a transmission reception point (TRP). Therefore, it is possible that the TRP is appropriately replaced with one of the above terms.

In general, there is one PUCCH resource used for PUCCH transmission, and since only one PUCCH-spatialRelationInfo can be activated for one PUCCH resource, the terminal can maintain the indicated transmission beam when transmitting the PUCCH. When the PUCCH is repeatedly transmitted over several slots or several mini-slots, a transmission beam according to one indicated PUCCH-spatialRelationInfo needs to be maintained throughout the repeated transmission.

Meanwhile, when PUCCH transmission for multiple TRPs is supported, the PUCCH may be repeatedly transmitted for each TRP. At this time, the terminal may have to support the configuration for PUCCH transmission to a plurality of TRPs.

For example, a plurality of beam directions may be indicated for transmission to a plurality of TRPs for one PUCCH, or each of a plurality of PUCCHs including the same UCI may be transmitted in different TRPs, and different beam directions for these PUCCHs This needs to be directed. In the present invention, by providing various methods of configuring PUCCH resources in consideration of the above-described case, the transmission delay time of uplink control information is minimized and high reliability is achieved. A specific PUCCH resource configuration method will be described in detail in the following examples.

Hereinafter, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. In addition, in describing the present disclosure, if it is determined that a detailed description of a related function or configuration may unnecessarily obscure the subject matter of the present disclosure, the detailed description thereof will be omitted. In addition, the terms described below are terms defined in consideration of functions in the present disclosure, which may vary according to intentions or customs of users and operators. Therefore, the definition should be made based on the content throughout this specification.

Hereinafter, the base station is a subject that performs resource allocation of the terminal, and may be at least one of gNode B, gNB, eNode B, Node B, BS (Base Station), radio access unit, base station controller, or a node on a network. The terminal may include a user equipment (UE), a mobile station (MS), a cellular phone, a smart phone, a computer, or a multimedia system capable of performing a communication function. In addition, although an embodiment of the present disclosure will be described below using an NR or LTE/LTE-A system as an example, the embodiment of the present disclosure may be applied to other communication systems having a similar technical background or channel type. In addition, the embodiments of the present disclosure may be applied to other communication systems through some modifications within a range that does not significantly depart from the scope of the present disclosure as judged by a person having skilled technical knowledge.

The contents of the present disclosure are applicable to FDD and TDD systems.

Hereinafter, in the present disclosure, higher signaling (or higher layer signaling) is a signal transmission method in which the base station uses a downlink data channel of the physical layer to the terminal, or from the terminal to the base station using the uplink data channel of the physical layer, RRC signaling, or PDCP signaling, or MAC (medium access control) may also be referred to as a control element (MAC control element; MAC CE).

Hereinafter, in the present disclosure, when the UE determines whether cooperative communication is applied, the PDCCH(s) for allocating the PDSCH to which the cooperative communication is applied has a specific format, or the PDCCH(s) for allocating the PDSCH to which the cooperative communication is applied. PDCCH(s) including a specific indicator indicating whether communication is applied or not, or PDCCH(s) for allocating a PDSCH to which cooperative communication is applied is scrambled with a specific RNTI, or assuming cooperative communication application in a specific section indicated by a higher layer, etc. It is possible to use various methods. Hereinafter, for convenience of description, a case in which a terminal receives a PDSCH to which cooperative communication is applied based on conditions similar to the above is referred to as an NC-JT case.

Hereinafter, in the present disclosure, determining the priority between A and B means selecting one having a higher priority according to a predetermined priority rule and performing an operation corresponding thereto or having a lower priority. It may be mentioned in various ways, such as omit or drop.

Hereinafter, in the present disclosure, the examples are described through a plurality of embodiments, but these are not independent and it is possible to apply one or more embodiments simultaneously or in combination.

<First embodiment: DCI reception for NC-JT>

Unlike the conventional 5G wireless communication system, it can support both a service requiring a high transmission rate, a service having a very short transmission delay, and a service requiring a high connection density. In a wireless communication network including a plurality of cells, TRPs, or beams, coordinated transmission between each cell, TRP, and/or beam increases the strength of a signal received by the UE or between each cell, TRP, or/and beam. It is one of the element technologies that can satisfy various service requirements by efficiently performing interference control.

Joint Transmission (JT) is a representative transmission technology for the above-mentioned cooperative communication. Through the joint transmission technology, one terminal is supported through different cells, TRP or/and beams to increase the strength of the signal received by the terminal. can do it On the other hand, since the characteristics of each cell, TRP or / and the channel between the beam and the terminal may be significantly different, it is necessary to apply different precoding, MCS, resource allocation, etc. to each cell, TRP or / and the link between the beam and the terminal. . In particular, for Non-Coherent Joint Transmission (NC-JT) that supports non-coherent precoding between each cell, TRP or/and beam, each cell, TRP or/and Individual DL (downlink) transmission information configuration for beams becomes important.

Meanwhile, such individual DL transmission information setting for each cell, TRP, and/or beam becomes a major factor in increasing the payload required for DL DCI transmission, which may adversely affect DCI reception performance. Therefore, it is necessary to carefully design a tradeoff between the amount of DCI information and the PDCCH reception performance for JT support.

12 is a diagram illustrating an example of an antenna port configuration and resource allocation for cooperative communication in a wireless communication system according to an embodiment of the present disclosure.

Referring to FIG. 12 , examples of radio resource allocation for each TRP according to a joint transmission (JT) technique and situations are shown.

12, 1200 is an example of coherent joint transmission (C-JT) supporting coherent precoding between each cell, TRP, and/or beam.

In C-JT, TRP A 1205 and TRP B 1210 may transmit single data (PDSCH) to UE 1215, and multiple TRPs may perform joint precoding. This means that the same DMRS ports (eg, DMRS ports A and B in both TRPs) are used for the same PDSCH transmission in the TRP A 1205 and the TRP B 1210 . In this case, the UE may receive one DCI information for receiving one PDSCH demodulated based on DMRS transmitted through DMRS ports A and B.

1220 in FIG. 12 is an example of non-coherent joint transmission (NC-JT) supporting non-coherent precoding between each cell, TRP or/and beam. In the case of NC-JT, a PDSCH is transmitted to the UE 1235 for each cell, TRP, and/or beam, and individual precoding may be applied to each PDSCH. Each cell, TRP or/and beam transmits a different PDSCH to improve throughput compared to single cell, TRP or/and beam transmission, or each cell, TRP or/and beam repeatedly transmits the same PDSCH to transmit a single cell, TRP Alternatively, reliability may be improved compared to beam transmission.

If the frequency and time resources used by a plurality of TRPs for PDSCH transmission are all the same (1240), if the frequency and time resources used by the plurality of TRPs do not overlap at all (1245), the frequency and time used by the plurality of TRPs Various radio resource allocation may be considered, such as when some of the resources overlap ( 1250 ).

In each of the above-described cases, when multiple TRPs repeatedly transmit the same PDSCH to improve reliability, if the receiving terminal does not know whether the corresponding PDSCH is repeatedly transmitted, the corresponding terminal performs combining in the physical layer for the corresponding PDSCH. There may be limitations in improving reliability. Therefore, the present disclosure provides a repeated transmission instruction and configuration method for improving NC-JT transmission reliability.

In order to simultaneously allocate a plurality of PDSCHs to one UE for NC-JT support, DCIs of various types, structures, and relationships may be considered.

13 is a diagram illustrating a configuration example of downlink control information (DCI) for cooperative communication in a wireless communication system according to an embodiment of the present disclosure.

Referring to FIG. 13 , various examples of DCI for NC-JT support are shown.

Referring to FIG. 13, case #1 (1300) is each other in (N-1) additional TRPs (TRP#1 to TRP#(N-1)) in addition to the serving TRP (TRP#0) used for single PDSCH transmission. In a situation where other (N-1) PDSCHs are transmitted, control information for PDSCH transmitted in (N-1) additional TRPs is in the same format as control information for PDSCH transmitted in serving TRP (same DCI format) This is an example of transmission. That is, the UE uses DCIs having the same DCI format and the same payload (DCI#0 ~ DCI#(N-1)) and different TRPs (TRP#0 ~ TRP#(N-1)) It is possible to obtain control information for PDSCHs transmitted in . Meanwhile, in this embodiment and the embodiments to be described later, control information transmitted in the serving TRP may be referred to as a first DCI, and DCI transmitted in another TRP (cooperative TRP) may be referred to as a second DCI.

In case #1 described above, each PDSCH control (allocation) degree of freedom may be completely guaranteed, but when each DCI is transmitted in different TRPs, a coverage difference for each DCI may occur and reception performance may be deteriorated.

Case #2(1305) is different (N-1) in (N-1) additional TRPs (TRP#1~TRP#(N-1)) in addition to the serving TRP (TRP#0) used for single PDSCH transmission. In a situation in which PDSCHs are transmitted, control information for PDSCH transmitted in (N-1) additional TRPs is transmitted in a different format (different DCI format or different DCI payload) from control information for PDSCH transmitted in the serving TRP. This is an example.

For example, in the case of DCI#0, which is control information for PDSCH transmitted in the serving TRP (TRP#0), all information elements of DCI format 1_0 or DCI format 1_1 are included, but cooperative TRP (TRP#1). Secondary DCI (hereinafter, sDCI)) (sDCI#0 to sDCI#(N-2)), which is control information for PDSCHs transmitted in ~TRP#(N-1)), is information of DCI format 1_0 or DCI format 1_1 It can contain only some of the elements.

Therefore, in the case of sDCI including control information for PDSCHs transmitted in the cooperative TRP, the payload is small compared to normal DCI (nDCI) including control information related to PDSCH transmitted in the serving TRP, or is insufficient compared to nDCI. It is possible to include reserved bits as many as the number of bits.

In case #2 described above, each PDSCH control (allocation) degree of freedom may be limited according to the contents of information elements included in sDCI. It may be less likely to occur.

Case #3 (1310) is different (N-1) in (N-1) additional TRPs (TRP#1 to TRP#(N-1)) other than the serving TRP (TRP#0) used for single PDSCH transmission. In a situation in which PDSCHs are transmitted, control information for PDSCH transmitted in (N-1) additional TRPs is transmitted in a different format (different DCI format or different DCI payload) from control information for PDSCH transmitted in the serving TRP. This is an example.

For example, in the case of DCI#0, which is control information for PDSCH transmitted in the serving TRP (TRP#0), includes all information elements of DCI format 1_0 or DCI format 1_1, and cooperative TRP (TRP#1). In the case of control information on PDSCHs transmitted in ~TRP#(N-1)), only some of the information elements of DCI format 1_0 or DCI format 1_1 may be included in one 'secondary' DCI (sDCI).

For example, the sDCI may include at least one of HARQ-related information such as frequency domain resource assignment of cooperative TRPs, time domain resource assignment, and MCS. In addition, in the case of information not included in sDCI, such as bandwidth part (BWP) indicator or carrier indicator, DCI (DCI#0, normal DCI, nDCI) of the serving TRP may be followed.

In case #3, each PDSCH control (allocation) degree of freedom may be limited according to the contents of the information element included in the sDCI, but the reception performance of the sDCI can be adjusted, and the terminal's The complexity of DCI blind decoding may be reduced.

Case #4 (1315) is different (N-1) in (N-1) additional TRPs (TRP#1 to TRP#(N-1)) in addition to the serving TRP (TRP#0) used for single PDSCH transmission. In a situation where PDSCH is transmitted, control information for PDSCH transmitted in (N-1) additional TRPs is transmitted through DCI (long DCI, IDCI), such as control information for PDSCH transmitted in serving TRP. . That is, the UE may obtain control information for PDSCHs transmitted in different TRPs (TRP#0 to TRP#(N-1)) through a single DCI.

In case #4, the complexity of DCI blind decoding of the terminal may not increase, but the PDSCH control (allocation) degree of freedom may be low such as the number of cooperative TRPs is limited according to long DCI payload restrictions.

In the following description and embodiments, sDCI may refer to various secondary DCIs, such as secondary DCI or normal DCI (DCI format 1_0 to 1_1 described above) including PDSCH control information transmitted in cooperative TRP, and no special restrictions are specified. In this case, the description is similarly applicable to the various auxiliary DCIs. In addition, terms such as first DCI and second DCI may be used to distinguish DCI according to the form or characteristic of the DCI or the TRP for transmitting the DCI. For example, DCI transmitted through the serving TRP may be expressed as a first DCI, DCI transmitted through the cooperative TRP may be expressed as a second DCI, and the like.

In the following description and embodiments, the aforementioned cases #1, case #2, and case #3 in which one or more DCIs (PDCCHs) are used to support NC-JT are divided into multiple PDCCH-based NC-JTs, and NC -The above-described case #4 in which a single DCI (PDCCH) is used for JT support can be divided into a single PDCCH-based NC-JT.

In the embodiments of the present disclosure, “cooperative TRP” may be replaced with various terms such as “cooperative panel” or “cooperative beam” when applied in practice.

In the embodiments of the present disclosure, "when NC-JT is applied" means "when a terminal simultaneously receives one or more PDSCHs in one BWP", "when a terminal receives two or more TCIs (Transmissions) simultaneously in one BWP" Configuration Indicator) indication when receiving a PDSCH", "in case the PDSCH received by the terminal is associated with one or more DMRS port groups", etc., can be interpreted variously according to the situation, but for convenience of explanation only used as an expression.

In the present invention, the radio protocol structure for NC-JT can be used in various ways according to the TRP deployment scenario. As an example, if there is no or small backhaul delay between cooperative TRPs, it is possible to use a structure based on MAC layer multiplexing similar to 1110 of FIG. 11 (CA-like method). On the other hand, when the backhaul delay between cooperative TRPs is so large that it cannot be ignored (for example, when 2 ms or more is required for information exchange between cooperative TRPs, such as CSI, scheduling, HARQ-ACK, etc.), similar to 1120 in FIG. 11, from the RLC layer It is possible to secure a characteristic strong against delay by using an independent structure for each TRP (DC-like method).

<Embodiment 1-1: Method of setting downlink control channel for Multi-PDCCH-based NC-JT operation>

In the Multiple PDCCH-based NC-JT, when transmitting DCI for the PDSCH schedule of each TRP, it may have a CORESET or a search space divided for each TRP. CORESET or search space for each TRP can be set as at least one of the following cases.

● Upper layer index setting for each CORESET: The CORESET setting information set as the upper layer may include an index value, and the TRP for transmitting the PDCCH from the corresponding CORESET may be distinguished by the set index value for each CORESET. That is, in a set of CORESETs having the same higher layer index value, the UE may determine or consider that the same TRP transmits a PDCCH or that a PDCCH scheduling a PDSCH of the same TRP is transmitted.

The above-described index for each CORESET may be named as CORESETPoolIndex, and the UE may determine or consider that the PDCCH is transmitted from the same TRP for CORESETs to which the same CORESETPoolIndex value is set. In the case of CORESET in which the CORESETPoolIndex value is not set, the UE may determine or consider that a default value of CORESETPoolIndex has been set, and the above-described default value may be 0.

● Multiple PDCCH-Config Configuration: Multiple PDCCH-Configs in one BWP are configured, and each PDCCH-Config may include PDCCH configuration for each TRP. That is, at least one of a list of CORESETs per TRP and a list of search spaces per TRP may be configured in one PDCCH-Config, and the terminal includes one or more CORESETs and one or more search spaces included in one PDCCH-Config to a specific TRP. It can be judged or considered as applicable.

● CORESET beam/beam group configuration: TRP corresponding to a corresponding CORESET can be distinguished through a beam or beam group set for each CORESET. For example, when the same TCI state is set in a plurality of CORESETs, the UE may consider that the corresponding CORESETs are transmitted through the same TRP or that the PDCCH scheduling the PDSCH of the same TRP is transmitted in the corresponding CORESETs or may be considered.

● Search space beam/beam group configuration: A beam or beam group is configured for each search space, and TRP for each search space can be distinguished through this. For example, when the same beam/beam group or TCI state is configured in a plurality of search spaces, the UE determines or considers that the same TRP transmits the PDCCH in the corresponding search space, or transmits a PDCCH for scheduling the PDSCH of the same TRP in the corresponding search space. can be judged or considered to be

By dividing CORESET or search space by TRP as described above, PDSCH and HARQ-ACK information classification for each TRP is possible, and through this, independent HARQ-ACK codebook generation for each TRP and independent PUCCH resource use are possible.

<Second embodiment: HARQ-ACK information delivery method for NC-JT transmission>

The second embodiment describes a method of delivering HARQ-ACK information for NC-JT transmission.

14A, 14B, 14C, and 14D are diagrams illustrating HARQ-ACK information delivery methods according to various DCI configurations and PUCCH configurations for NC-JT transmission.

값 중 적어도 하나를 통해 지시될 수 있다.First, in Figure 14a (option #1: HARQ-ACK for single-PDCCH NC-JT) (14-00), in the case of a single-PDCCH-based NC-JT, one or a plurality of PDSCHs (14-05) scheduled by the TRP It shows an example in which HARQ-ACK information is transmitted through one PUCCH resource 14-10. The PUCCH resource (14-10) is the above-described DCI in the PRI value and

It may be indicated through at least one of the values.

14B (Option #2) to 14D (Option #4) (14-20, 14-40, 14-60)) show the case of multi-PDCCH-based NC-JT. At this time, each option may be divided according to the number of PUCCH resources to transmit HARQ-ACK information corresponding to the PDSCH of each TRP and the position on the time axis of the PUCCH resource.

Figure 14b (Option #2: joint HARQ-ACK) (14-20) is the terminal HARQ-ACK information corresponding to the PDSCH (14-25, 14-26) of each TRP one PUCCH resource (14-30) An example of transmission through At this time, all HARQ-ACK information for each TRP may be generated based on a single HARQ-ACK codebook, or HARQ-ACK information for each TRP may be generated based on an individual HARQ-ACK codebook. In this case, HARQ-ACK information for each TRP may be concatenated and transmitted from one PUCCH resource 14-30.

When an individual HARQ-ACK codebook for each TRP is used, the TRP is a set of CORESETs having the same higher layer index as defined in the above-described embodiment 1-1, a set of CORESETs belonging to the same TCI state or beam or beam group, It may be divided into at least one of a set of search spaces belonging to the same TCI state or beam or beam group.

Figure 14c (Option #3: inter-slot time-division multiplexed (TDMed) separate HARQ-ACK) (14-40) shows the terminal HARQ-ACK information corresponding to the PDSCH (14-45, 14-46) of each TRP Shows an example of transmitting through the PUCCH resource (14-50, 14-51) of the different slots (14-52, 14-53).

값에 의해 결정될 수 있다. 만일 다수의 PDCCH가 지시하는

값이 동일 슬롯을 가리키는 경우, 단말은 해당 PDCCH들은 모두 동일 TRP에서 전송되었다고 간주하고 이들에 대응하는 HARQ-ACK 정보를 모두 전송할 수 있다. 이 때 상기 동일 슬롯 내 위치하는 하나의 PUCCH 자원에서 연접된 HARQ-ACK 정보가 상기 TRP로 전송될 수 있다.The slot including the PUCCH resource for each TRP is described above.

value can be determined. If multiple PDCCHs indicate

If the value indicates the same slot, the UE may consider that all corresponding PDCCHs are transmitted in the same TRP and transmit all HARQ-ACK information corresponding to them. In this case, HARQ-ACK information concatenated in one PUCCH resource located in the same slot may be transmitted to the TRP.

Figure 14d (Option #4: intra-slot TDMed separate HARQ-ACK) (14-60) is the same slot (14-75) HARQ-ACK information corresponding to the PDSCH (14-65, 14-66) of each TRP I show an example of transmission through different PUCH resources (14-70, 14-71) in different symbols.

값에 의해 결정될 수 있으며, 만일 다수의 PDCCH가 지시하는

값이 동일 슬롯을 가리키는 경우 적어도 다음 중 하나의 방법을 통해 단말은 PUCCH resource 선택 및 전송 심볼을 결정을 수행할 수 있다.The slot including the PUCCH resource for each TRP is described above.

It can be determined by a value, and if multiple PDCCHs indicate

When the value indicates the same slot, the UE may select a PUCCH resource and determine a transmission symbol through at least one of the following methods.

● PUCCH resource group setting for each TRP

A PUCCH resource group for HARQ-ACK transmission for each TRP may be configured. As in the above-described embodiment 1-1, when TRP for each CORESET or / and search space is distinguished, a PUCCH resource for HARQ-ACK transmission for each TRP may be selected from within the PUCCH resource group for the TRP. Time division multiplexing (TDM) may be expected between the PUCCH resources selected from different PUCCH resource groups, that is, the selected PUCCH resource may be expected not to overlap in symbol units (within the same slot). After generating an individual HARQ-ACK codebook for each TRP, the UE may transmit it in the PUCCH resource selected for each TRP as described above.

● Different PRI directives for each TRP

As in the above-described embodiment 1-1, when TRPs for each CORESET and/or search space are distinguished, a PUCCH resource for each TRP may be selected according to the PRI. That is, the PUCCH resource selection process in Rel-15 described above may be independently performed for each TRP. At this time, the PRIs used to determine the PUCCH resource for each TRP must be different. For example, the UE may not expect that the PRI used for determining the PUCCH resource for each TRP is indicated with the same value. For example, the PDCCH for TRP 1 may include PRIs set as PRI=n, and the PDCCH for TRP 2 as PRI=m, respectively.

In addition, TDM can be expected between the PUCCH resources indicated by the PRI for each TRP. That is, it can be expected that the selected PUCCH resources do not overlap in symbol units (within the same slot). As described above, after generating an individual HARQ-ACK codebook for each TRP in the PUCCH resource selected for each TRP, it can be transmitted.

값을 서브슬롯 단위로 정의●

Define values in subslots

값은 서브슬롯 단위로 정의될 수 있다. 예컨대 단말은 동일 서브슬롯에 HARQ-ACK을 보고하도록 지시된 PDSCH/PDCCH들에 대한 HARQ-ACK codebook을 생성 후 PRI로 지시된 PUCCH resource에 전송할 수 있다. 상기 HARQ-ACK codebook 생성 및 PUCCH resource 선택 과정은 CORESET 및/또는 탐색공간 별 TRP 구분 여부와 관계 없을 수 있다.Follow the PUCCH resource selection process in Rel-15 described above,

The value may be defined in units of subslots. For example, the UE may generate a HARQ-ACK codebook for PDSCH/PDCCHs indicated to report HARQ-ACK in the same subslot, and then transmit it to the PUCCH resource indicated by PRI. The HARQ-ACK codebook generation and PUCCH resource selection process may be independent of whether the TRP is divided by CORESET and/or search space.

When the terminal supports NC-JT reception, one of the above options may be set through a higher layer or may be implicitly selected according to circumstances. For example, a terminal supporting multi-PDCCH-based NC-JT may select one of option 2 (joint HARQ-ACK), option 3, or option 4 (separate HARQ-ACK) as a higher layer. As another example, depending on whether single-PDCCH-based NC-JT or multi-PDCCH-based NC-JT is supported or configured, one of option 1 for the former and option 2 or 3 or 4 for the latter may be selected.

As another example, the option used according to the selection of the PUCCH resource in the multi-PDCCH based NC-JT may be determined. When PUCCH resources of the same slot are selected in different TRPs, if the corresponding PUCCH resources are different and do not overlap in units of symbols, HARQ-ACK is transmitted according to option 4, and if the PUCCH resources overlap in units of symbols or the assigned symbols are the same According to option 2, HARQ-ACK may be transmitted. When PUCCH resources of different slots are selected in different TRPs, HARQ-ACK may be transmitted according to option 3.

The setting for the option may be dependent on the terminal capability. For example, the base station may receive the capability of the terminal according to the above-described procedure, and the option may be set based thereon. For example, only the terminal having the capability to support intra-slot TDMed separate HARQ-ACK is allowed to set option 4, and the terminal not equipped with the corresponding capability may not expect the configuration according to option 4.

15 is a flowchart illustrating an example of a method in which the terminal transmits HARQ-ACK information for NC-JT transmission to the base station.

Referring to FIG. 15, (not shown), the terminal may transmit capability information on whether to support the above-described option to the base station in a message (eg, UECapabilityInformation message) reporting the UE capability, and the base station allows the terminal to Based on the transmitted capability information, which option is applied to the terminal may be explicitly set or a specific option may be implicitly applied.

In step 1580, the UE may receive PUCCH configuration information from the base station through higher signaling. The PUCCH configuration information may include at least one information of Table 21, Table 22, Table 29, and Table 30, and information for setting the relationship between PRI and PUCCH resources as shown in Table 26 and PUCCH group configuration information or Table 21 At least one of information for setting candidates of the K ₁ value such as .

Thereafter, in step 1581, the UE may receive a DCI for scheduling downlink data from the base station on the PDCCH (this may be mixed with PDCCH reception).

Thereafter, in step 1582, the terminal checks at least one of the HARQ-ACK payload to be transmitted according to the method described above based on the option applied to the terminal, the PDSCH-to-HARQ feedback timing indicator included in the DCI, or the PRI to determine the PUCCH resource to transmit the HARQ-ACK.

Thereafter, the UE may transmit HARQ-ACK information in the determined PUCCH resource in step 1583 .

Not all steps of the method described above have to be performed, and certain steps may be omitted or performed in a different order.

16 is a flowchart illustrating an example of a method in which a base station receives HARQ-ACK information for NC-JT transmission from a terminal.

Referring to FIG. 16, the base station (not shown) may receive a message (eg, UECapabilityInformation message) reporting UE capability including capability information on whether or not the above-described option transmitted by the terminal is supported, Based on the capability information transmitted by the terminal, which option is applied to the terminal can be explicitly set or a specific option can be implicitly applied.

In step 1685, the base station may transmit PUCCH configuration information to the terminal through higher signaling. The PUCCH configuration information may include at least one information of Table 21, Table 22, Table 29, and Table 30, and information for setting the relationship between PRI and PUCCH resources as shown in Table 26 and PUCCH group configuration information or Table 21 At least one of information for setting candidates of the K ₁ value such as .

Thereafter, the base station may transmit a DCI for scheduling downlink data to the terminal on the PDCCH in step 1686 (this may be mixed with PDCCH transmission). The terminal checks at least one of the HARQ-ACK payload to be transmitted according to the method described above based on the option applied to the terminal, the PDSCH-to-HARQ feedback timing indicator included in the DCI, or the PRI to receive the HARQ-ACK. It is possible to determine the PUCCH resource to be transmitted.

Thereafter, the UE transmits HARQ-ACK information in the determined PUCCH resource, and the base station may receive HARQ-ACK information in the PUCCH resource determined in the same manner in step 1687 .

Not all steps of the method described above have to be performed, and certain steps may be omitted or performed in a different order.

<Third embodiment: resource configuration for PUCCH transmission to multiple TRPs>

For PUCCH transmission to multiple TRPs, at least one of the following methods may be used to configure PUCCH resources. Meanwhile, PUCCH resource transmission, which will be described later, may mean PUCCH transmission or UCI transmission through PUCCH.

1) Repeated transmission of PUCCH through a single PUCCH resource: Through a single PUCCH resource, PUCCH is repeatedly transmitted according to a predetermined repeated transmission unit, and a PUCCH transmission beam or / and transmission for each repeated transmission or in some repeated transmissions among all repeated transmissions Power can be changed.

2) PUCCH transmission through multiple PUCCH resources: A plurality of different PUCCHs, including the same control information, are transmitted in different TRPs, and the plurality of PUCCHs may not overlap each other. In addition, different transmission beams and/or transmission powers may be applied to the plurality of PUCCHs.

Detailed embodiments of each of the above-described resource configuration methods will be described below.

<Embodiment 3-1: Resource configuration for repeatedly transmitting PUCCH to multiple TRPs through a single PUCCH resource>

When repeatedly transmitting PUCCH to multiple TRPs through a single PUCCH resource, there may be the following difference from the case of repeatedly transmitting PUCCH to a single TRP through a single PUCCH resource.

● Whether short PUCCH repeat transmission is required:

When PUCCH is repeatedly transmitted with a single TRP through a single PUCCH resource, only long PUCCH is used and repeated transmission of short PUCCH is not supported. For this reason, repeated transmission is for coverage enhancement, but short PUCCH is not designed for coverage enhancement.

On the other hand, one purpose of performing repeated PUCCH transmission to multiple TRPs may be to overcome blockage. . Therefore, a short PUCCH may be used for repeated PUCCH transmission to multiple TRPs.

● Whether scheduling is required to reflect transient time between repeated transmissions:

When short PUCCH repeated transmission to multiple TRPs is performed, a beam and transmission power change between repeated transmissions may occur. When the transmission power for the short PUCCH is changed, a guard time or an offset between the short PUCCH transmissions may be required to satisfy the required transient time. Therefore, when performing repeated short PUCCH transmission to multiple TRPs, repeated transmission reflecting the offset may be required.

First, repeated transmission of a short PUCCH may be performed in units of sub-slots.

18A is a diagram illustrating repeated short PUCCH transmission in sub-slot units.

The length of the sub-slot may be the same as or longer than the length of the repeatedly transmitted short PUCCH, and the length of the sub-slot may vary according to time.

18A shows an example in which the length of all sub-slots is equal to 2 for convenience of description (18-05), but the present invention is not limited thereto. The offset between the short PUCCHs may be set through PUCCH resource scheduling of the base station, such as a start symbol position in a sub-slot of the short PUCCH and the length of the short PUCCH. However, if the offset cannot be set due to PUCCH resource scheduling, such as when the length of the sub-slot is the same as the length of the short PUCCH, a method of setting the offset between repeated short PUCCH transmissions may be required. The offset may be set in sub-slot units or symbol units.

18A shows an example in which the offset is set to 1 symbol (18-10), but 1 symbol is merely an example and is not limited thereto. The offset may be set between each short PUCCH repeated transmission. Alternatively, since an offset is not required when a transmission power change does not occur during repeated transmission of a short PUCCH, an offset may be set only between repeated transmissions in which a transmission power change occurs.

The above 'between repeated transmissions in which transmission power is changed' may be replaced with expressions such as 'between repeated transmissions in which a beam change occurs', 'between repeated transmissions in which spatialRelationInfo is changed'.

Although the above has been described as an example of short PUCCH repeated transmission for convenience of technology, the above description may be similarly applied to long PUCCH.

On the other hand, in consideration of a case in which PUCCH is repeatedly transmitted using a plurality of PUCCH resources alternately, repeated PUCCH transmission may be repeated in every sub-slot of a predetermined period, rather than in every adjacent sub-slot. 18A shows an example in which the above-described repeated transmission period is set to 2 sub-slots (18-15), but the 2 sub-slot period is merely an example and is not limited thereto. A preset offset may be reflected in the repeated transmission period (18-15).

Next, repeated transmission of the short PUCCH may be performed in a slot or a sub-slot.

18B is a diagram illustrating repeated short PUCCH transmission in a slot or a sub-slot.

The above-described short PUCCH repeated transmission may be performed within one slot or sub-slot (18-20), or may be performed over a plurality of slots or sub-slots (18-30). If repeated transmission is performed in one slot or sub-slot (18-20), an offset between repeated transmissions may be set (18-25). The offset may be set in units of symbols. The offset may be set between each short PUCCH repeated transmission. Alternatively, since an offset is not required when a transmission power change does not occur during repeated transmission of a short PUCCH, an offset may be set only between repeated transmissions in which a transmission power change occurs.

The 'between repeated transmissions in which the transmission power is changed' may be replaced with expressions such as 'between repeated transmissions in which a beam change occurs', 'between repeated transmissions in which spatialRelationInfo is changed'.

Alternatively, the setting and/or application of an offset may vary according to the length of the repeatedly transmitted PUCCH. For example, an offset may be set or applied only during repeated short PUCCH transmission, and the offset may not be applied during repeated long PUCCH transmission. For this reason, whether or not the guard time between transmissions accompanied by the above-described transmission power change may be different depending on the length of the transmitted PUCCH.

If repeated transmission is performed over a plurality of slots or sub-slots (18-30), an offset between repeated transmissions may be set (18-35). The offset may be applied only between repeated transmissions within one slot or sub-slot. In this case, the offset between repeated transmissions between different slots or sub-slots may be given by setting the start symbol of the short PUCCH (18-40). That is, the short PUCCH start symbol configuration may be applied to the first short PUCCH repeated transmission of every slot or sub-slot.

Alternatively, the offset may be applied between repeated transmissions between different slots or sub-slots. In this case, the start symbol set for the short PUCCH may be applied only to the first short PUCCH repeated transmission among all short PUCCH repeated transmissions. The above-described offset may be set between every short PUCCH repeated transmission. Alternatively, since an offset is not required when a transmission power change does not occur during repeated transmission of a short PUCCH, an offset may be set only between repeated transmissions in which a transmission power change occurs.

The 'between repeated transmissions in which the transmission power is changed' may be replaced with expressions such as 'between repeated transmissions in which a beam change occurs', 'between repeated transmissions in which spatialRelationInfo is changed'. Alternatively, the setting and/or application of an offset may vary according to the length of the repeatedly transmitted PUCCH. For example, an offset may be set or applied only during repeated short PUCCH transmission, and the offset may not be applied during repeated long PUCCH transmission. For this reason, whether or not the guard time between transmissions accompanied by the above-described transmission power change may be different depending on the length of the transmitted PUCCH.

Although the above has been described as an example of short PUCCH repeated transmission for convenience of technology, the above description may be similarly applied to long PUCCH.

18C is another diagram illustrating repeated PUCCH transmission in a slot or a sub-slot in a wireless communication system according to an embodiment of the present disclosure.

Referring to FIG. 18C , when repeated PUCCH transmission is performed within a slot or sub-slot, a case (18-50) may occur in which some PUCCHs of all repeated transmissions span the boundary of a slot or a sub-slot. As a processing method for this case, at least one of the following methods may be included.

Method 1. In the repetitive transmission PUCCH, a symbol crossing a slot or a sub-slot boundary is dropped. In this case, the set number of repeated transmissions is the same as the actual number of repeated transmissions.

Method 2. In the repeated transmission PUCCH, a symbol crossing a slot or a sub-slot boundary is regarded as a new repeated transmission. In this case, the actual number of repeated transmissions may be greater than the set number of repeated transmissions.

Method 3. The repeated transmission PUCCH, that is, repeated transmission spanning a boundary of a slot or a sub-slot is dropped. In this case, the actual number of repeated transmissions may be smaller than the set number of repeated transmissions.

Method 4. The repeated transmission PUCCH, that is, repeated transmission spanning a boundary of a slot or a sub-slot is shifted to the next slot or sub-slot. The shifted position may be the first symbol of the next slot or sub-slot, or a position set as the PUCCH start symbol.

Method 5. The repeated transmission PUCCH, that is, scheduled so as not to cause repeated transmission across a boundary of a slot or a sub-slot. In this case, the UE may not expect repeated transmission across the boundary of the slot or sub-slot.

The above-described methods can be similarly applied even when one or more DL symbols exist in a slot or a sub-slot, and repeated transmission PUCCHs overlap the DL symbols.

According to Method 1 and Method 2 among the above methods, the lengths of repetitively transmitted PUCCHs may not be the same. In this case, soft combining between PUCCHs having different lengths may not be performed. Therefore, it may be necessary to change at least one of the following constraints or PUCCH encoding.

- Constraint: The length must be the same between repeated transmission PUCCHs with the same target TRP. The length may be different between repeated transmission PUCCHs with different target TRPs. For this reason, in the case of repeated transmission with different target TRPs, soft combining of PUCCHs received from different TRPs may be difficult due to a backhaul capacity limitation between TRPs. Therefore, soft combining between different TRPs may not necessarily be supported. On the other hand, in case of repeated transmission having the same target TRP, if soft combining is not supported even though soft combining is possible, unnecessary performance degradation may occur.

- PUCCH encoding change: When encoding PUCCH, according to the length of UCI, if it is 11 bits or less, Reed-Muller code is used, and if it is more than 11 bits, it is encoded using Polar code. In the case of using a Polar code, if the total number of bits that can be transmitted according to the amount of resources allocated to the PUCCH is E , a different encoding method may be applied according to E for each PUCCH repeatedly transmitted. Therefore, when the terminal uses the Polar code, it is assumed that the E values of all repetitive transmission PUCCHs are the same, and after encoding, it can transmit adaptively according to the actual resource amount for each repetitive transmission PUCCH. For example, if the actual resource amount of the repeatedly transmitted PUCCH is smaller than the value E , a part of the code encoded according to the value E may be dropped (puncturing). Alternatively, if the actual resource amount of the repeated transmission PUCCH is greater than the E value, a part of the encoded code may be repeated according to the actual resource amount. At least one of the following may be included as a criterion for determining the above-described E value.

■ Criterion 1: PUCCH corresponding to a specific sequence among repeated transmission PUCCHs. For example, the first PUCCH

■ Criterion 2: PUCCH with the most resource among repeated transmission PUCCHs

■ Criterion 3: PUCCH with the least amount of resources among repeated transmission PUCCHs

■ Criterion 4: Average value for each resource amount by repeated transmission PUCCH

■ Criterion 5: PUCCH transmitted by a specific TRP among repeated transmission PUCCHs. For example, PUCCH corresponding to the first beam

For the repeated PUCCH transmission, the number of TRPs may be smaller than the number of repeated transmissions. In this case, a mapping rule for which TRP each repeated transmission is transmitted may be required. As an example, a transmission pattern for each TRP may be set periodically.

19 is a diagram illustrating an example of a mapping rule between repeated PUCCH transmission and TRP according to an embodiment of the present disclosure.

,

중 하나로 설정될 수 있다 (19-10, 19-20). L 값이 작으면 TRP switching이 더 잦아지므로 early termination 확률이 올라가는 장점이 있는 반면, TRP switching을 위한 오버헤드가 더 필요한 단점이 있다. 또 다른 예로, 전체 반복 전송에 대한 TRP별 전송 패턴이 지시될 수 있다. 예컨대 4번의 반복 전송에 대해 2개의 수신 TRP가 지정되고 이들이 TRP#1, TRP#2로 명명되는 경우, 반복 전송에 대한 패턴이 {TRP#1, TRP#1, TRP#1, TRP#2} 와 같이 지시될 수 있다.Referring to FIG. 19, FIG. 19 shows a transmission pattern for each TRP when the total number of repeated transmissions is N and the number of received TRPs is K. Each TRP is assigned to L consecutive repeated transmissions in a round-robin manner. The L value is 1, 2, ... ,

,

It can be set to one of (19-10, 19-20). If the L value is small, TRP switching becomes more frequent, so there is an advantage of increasing the early termination probability, but there is a disadvantage that more overhead for TRP switching is required. As another example, a transmission pattern for each TRP for the entire repeated transmission may be indicated. For example, if two received TRPs are designated for 4 repeated transmissions and they are named TRP#1 and TRP#2, the pattern for repeated transmissions is {TRP#1, TRP#1, TRP#1, TRP#2} can be indicated as

<Embodiment 3-2: Resource configuration for PUCCH transmission to multiple TRPs through multiple PUCCH resources>

By carrying the same UCI through a plurality of PUCCH resources, the UCI may be transmitted in different TRPs through each of the plurality of PUCCH resources. In this case, different beams may be configured for each of the plurality of PUCCH resources, and when repeated transmission is configured for the PUCCH resource, the entire repeated transmission may be transmitted with the same TRP. The UE must determine whether a specific UCI is transmitted through multiple PUCCH resources as described above or is transmitted through one PUCCH resource as in the prior art. For this, at least one or more of the following methods may be used.

- Explicit PUCCH set configuration: PUCCH resources for transmitting the same UCI may be bundled into one PUCCH set. A PUCCH set may be explicitly configured, and each PUCCH set may have a different ID. The base station may indicate to the UE that the UCI is transmitted through a plurality of PUCCH resources by indicating a PUCCH set ID for UCI transmission or a plurality of PUCCH resource IDs included in the PUCCH set. Alternatively, the base station may indicate that the UCI is transmitted as one PUCCH resource by indicating one PUCCH resource ID to the terminal. Alternatively, a PUCCH set is also defined in a PUCCH resource indicator such as PRI, so that the UE can determine whether to use a plurality of PUCCH resources with the PRI value. For example, a specific PRI value may indicate the PUCCH set, while other PRI values may be configured to indicate one PUCCH resource.

- Implicit PUCCH set configuration: When the PUCCH resource group for each TRP is set, a PUCCH resource is selected according to a specific rule for each group, and the PUCCH resources selected for all groups are gathered to form a PUCCH set. As an example of the rule, PUCCH resources having the same PUCCH resource ID in a group may be configured as a PUCCH set. At this time, the UE may determine whether to use a plurality of PUCCH resources according to whether there is one or a plurality of PUCCH resources corresponding to the PUCCH resource ID.

A constraint condition for the PUCCH set may be set. For example, if repeated transmission for PUCCH resources in the PUCCH set is not set, all PUCCH resources in the PUCCH set may be transmitted in the same slot or sub-slot, and at this time, there is overlap on the time axis between PUCCH resources in the PUCCH set. may not be allowed. As another example, the maximum value of the maximum number of PUCCH resources in the PUCCH set may be limited. For example, the maximum value of the number of PUCCH resources may be 2.

<Fourth embodiment: terminal capability for transmission with multiple TRPs>

Independent UE capability may be required for each option related to PUCCH transmission to the above-described multiple TRPs. For example, some of the terminals may not support short PUCCH repeated transmission. Therefore, the terminal reports whether short PUCCH repeated transmission is supported to the base station through the capability report, and the base station may set short PUCCH repetition only to the short PUCCH repeated transmission support terminal after receiving the terminal capability report.

On the other hand, even if the terminal supports short PUCCH repeated transmission, the minimum offset value between the repetitions that can be supported for each terminal may be different. Therefore, the UE may report the minimum offset value between the supportable repetitions in the case of repeated short PUCCH transmission to the base station through the capability report in symbol, slot, sub-slot, or absolute time units.

The base station may schedule the PUCCH with reference to the minimum supportable offset of the terminal after the terminal capability report. The minimum offset may be reported not only between repeated short PUCCH transmissions, but also between short PUCCH - long PUCCH repeated transmissions, and long PUCCH - long PUCCH repeated transmissions.

Meanwhile, the minimum offset may not be an offset applied to all PUCCH repeated transmissions. For reasons such as the aforementioned transition time guarantee, the minimum offset may be a value applied only between repeated PUCCH transmissions accompanied by a beam/transmission power change. Although the above description has been described only for the case of repeated transmission of the same PUCCH in the 3-1 embodiment for convenience of description, it is similarly applicable to the case of multiple PUCCH resource transmission in the 3-2 embodiment.

In addition, the maximum number of repeatedly transmitted PUCCHs in a slot or sub-slot may also be different for each UE. Accordingly, the UE may report the maximum number of repeatedly transmitted PUCCHs to the base station through capability reporting. Meanwhile, the length of the sub-slot supported by the terminal may also be different for each terminal, and the length of the repeatedly transmitted sub-slot may be reported to the base station through the capability report. In addition, the combination of the capabilities may be reported to the base station. For example, the maximum number of repeatedly transmitted PUCCHs per sub-slot length per slot may be reported to the base station through UE capability reporting. Although the above description has been described only for the case of repeated transmission of the same PUCCH in the 3-1 embodiment for convenience of description, it is similarly applicable to the case of multiple PUCCH resource transmission in the 3-2 embodiment.

<Fifth embodiment: PUSCH repeated transmission method considering multiple TRP>

A fifth embodiment of the present disclosure describes a method of setting and indicating L1 signaling as higher layer signaling for repeated PUSCH transmission in consideration of multiple TRP. Repeated PUSCH transmission in consideration of multiple TRP may be operated through single or multiple DCI-based indications, which will be described in Examples 5-1 and 5-2, respectively. In addition, in embodiment 5-3 of the present disclosure, a method of repeatedly transmitting a configured grant PUSCH in consideration of multiple TRP will be described. In addition, in embodiment 5-4 of the present disclosure, a method of configuring an SRS resource set for repeated PUSCH transmission in consideration of multiple TRP will be described.

<Example 5-1: PUSCH repeated transmission method considering multiple TRP based on single DCI>

As an embodiment of the present disclosure, in embodiment 5-1, a PUSCH repeated transmission method in consideration of multiple TRPs based on a single DCI will be described. The UE may report to the base station that a PUSCH repeated transmission method in consideration of multiple TRPs based on a single DCI is possible through the UE capability report. The base station determines which PUSCH repetition transmission scheme to use for the UE reporting the UE capability (e.g., the UE capability to support repeated PUSCH transmission considering single DCI-based multiple TRP) through higher layer signaling. have. In this case, the higher layer signaling may be configured by selecting one of the two types of repeated PUSCH transmission type A and repeated PUSCH transmission type B.

In Rel-15/16, in the case of the PUSCH repeated transmission method considering a single TRP, both the codebook and non-codebook-based transmission methods were performed based on a single DCI. The UE may apply the same value to each repeated PUSCH transmission by using the SRI or TPMI indicated by one DCI when transmitting the codebook-based PUSCH. In addition, the UE may apply the same value to each repeated PUSCH transmission using an SRI indicated by one DCI when transmitting a non-codebook-based PUSCH. For example, if codebook-based PUSCH transmission and PUSCH repeated transmission scheme A are configured as higher layer signaling, and the time resource allocation index, SRI index 0, and TPMI index 0 in which the number of repeated PUSCH transmissions is set to 4, are instructed through DCI, The UE applies both SRI index 0 and TPMI index 0 to each of the 4 repeated PUSCH transmissions. Here, SRI may be related to a transmission beam, and TPMI may be related to a transmission precoder. Unlike the repeated PUSCH transmission method considering a single TRP, the repeated PUSCH transmission method considering multiple TRPs may have to apply a transmission beam and a transmission precoder differently for transmission to each TRP. Accordingly, the UE may receive a plurality of SRIs or TPMIs indicated through DCI and apply them to each repeated PUSCH transmission to perform repeated PUSCH transmission in consideration of multiple TRPs.

When instructing the UE to transmit a PUSCH repeated transmission method considering multiple TRPs based on a single DCI, the following methods can be considered as a method of indicating a plurality of SRIs or TPMIs when the PUSCH transmission method is a codebook or a non-codebook. have.

[Method 1] Single DCI transmission with multiple SRI or TPMI fields

In order to support the PUSCH repeated transmission method considering multiple TRPs based on a single DCI, the base station may transmit a DCI having a plurality of SRI or TPMI fields to the UE. This DCI is a new format (eg, DCI format 0_3) or an existing format (eg, DCI format 0_1, 0_2), but it is determined whether additional higher layer signaling (eg, a plurality of SRI or TPMI fields can be supported) capable signaling) is configured and the corresponding configuration exists, it may be DCI in which there are a plurality of SRI or TPMI fields, each existing only one by one. For example, if the UE is configured with codebook-based PUSCH transmission as higher layer signaling, if higher layer signaling capable of determining whether a plurality of SRI or TPMI fields can be supported is configured, two SRI fields and two By receiving DCI of a new format or an existing format having a TPMI field, it is possible to perform repeated PUSCH transmission based on a codebook in consideration of multiple TRPs. As another example, when non-codebook-based PUSCH transmission is configured as higher layer signaling, if higher layer signaling capable of determining whether a plurality of SRI or TPMI fields can be supported is configured, two SRI fields By receiving DCI of a new format or an existing format with For all of the above-described codebook or non-codebook-based PUSCH transmission, if a plurality of SRI fields are used, two or more SRS resource sets in which usage, which is higher layer signaling, is set to a codebook or a non-codebook, may be configured, Each SRI field may indicate an SRS resource, respectively, and each SRS resource may be included in two different SRS resource sets. The contents of the plurality of SRS resource sets will be described in detail in the 5-4th embodiment.

[Method 2] DCI transmission with enhanced SRI and TPMI fields applied

In order to support a PUSCH repeated transmission method considering multiple TRPs based on a single DCI, the UE may receive an enhanced SRI or MAC-CE for TPMI field support from the base station. Corresponding MAC-CE indicates to change the interpretation of the codepoint of the DCI field to indicate a plurality of transmission beams for a specific codepoint of the SRI field in the DCI or to indicate a plurality of transmission precoders for a specific codepoint of the TPMI field. may contain information. The following two methods may be considered as a method of indicating a plurality of transmission beams.

- MAC-CE reception that activates a specific codepoint of the SRI field to indicate one SRS resource connected to a plurality of SRS spatial relation info

- MAC-CE reception that activates a specific codepoint of the SRI field to indicate a plurality of SRS resources connected to one SRS spatial relation info

When indicating a plurality of SRS resources using the enhanced SRI field, since the transmission power control parameters of the SRS resource are set for each SRS resource set, in order to set different transmission power control parameters for each TRP, each SRS resource is different It may exist in the SRS resource set. Accordingly, there may be two or more SRS resource sets in which usage, which is upper layer signaling, is set to codebook or non-codebook.

<Example 5-2: PUSCH repeated transmission method considering multiple TRP based on multiple DCI>

As an embodiment of the present disclosure, in embodiment 5-2, a repeated PUSCH transmission method in consideration of multiple TRP based on multiple DCI will be described. As described above, since all PUSCH repeated transmission methods in Rel-15/16 consider a single TRP, it is recommended that the transmission beam, transmission precoder, resource allocation, and power control parameters use the same value for each repeated transmission. It was possible. However, in the case of repeated PUSCH transmission considering multiple TRPs, different parameters may need to be applied for each TRP with respect to PUSCH transmission related parameters indicated by DCI or configured by higher layer signaling for each PUSCH repeated transmission to multiple TRPs. For example, when multiple TRPs exist in different directions from the terminal, since the transmission beam or the transmission precoder may be different, the transmission beam or the transmission precoder for each TRP needs to be set or indicated, respectively. As another example, when multiple TRPs exist at different distances from the UE, independent power control schemes between the multiple TRPs and the UE may be required, and thus different time/frequency resource allocation may be made. For example, a relatively small number of RBs and a large number of symbols may be allocated to a TRP existing at a relatively long distance compared to a specific TRP in order to increase power per RE. Therefore, if different information applied to each TRP is transmitted to the UE through one DCI, the bit length of the corresponding DCI may be very large, so it may be more efficient to instruct the UE to repeatedly transmit PUSCH through a plurality of DCIs. .

The UE may report to the base station that a PUSCH repeated transmission method considering multiple TRP based on multiple DCI is possible through the UE capability report. For the UE reporting the corresponding UE capability (eg, UE capability supporting PUSCH repeated transmission considering multiple DCI-based multiple TRP), the base station configures through higher layer signaling, indicates through L1 signaling, or higher layer By using configuration and indication through a combination of signaling and L1 signaling, it is possible to notify the UE to perform repeated PUSCH transmission in consideration of multiple TRPs through multiple DCI. The base station may use a method of configuring or instructing repeated PUSCH transmission in consideration of multiple TRP based on multiple DCI as follows.

The UE can expect different time/frequency resource allocation information indicated through each DCI in consideration of TRPs located at different distances from the UE during repeated PUSCH transmission considering multiple TRPs based on multiple DCIs. The terminal may report to the base station whether different time/frequency resources can be allocated with the terminal capability. The base station can set whether to allocate different time/frequency resources to the terminal through higher layer signaling, and the terminal receiving the configuration can expect different time/frequency resource allocation information to be instructed by each DCI. In this case, the UE may configure or receive repeated PUSCH transmission in consideration of multiple DCI-based multiple TRPs from the base station in consideration of the conditions between the higher layer signaling configuration and the plurality of DCI fields. When the transmit beam and transmit precoder information are instructed through multiple DCI, the SRI and TPMI in the first received DCI may be applied first when the transmit beam mapping method is applied, and the SRI and the TPMI in the second received DCI TPMI can be applied secondly when the transmission beam mapping method is applied.

The base station can set CORESETPoolIndex, which is higher layer signaling, to the terminal for each CORESET, and when the terminal receives which CORESET through CORESETPoolIndex, it can know from which TRP the corresponding CORESET is transmitted. For example, if CORESETPoolIndex is set to 0 in CORESET#1 and CORESETPoolIndex is set to 1 in CORESET#2, the UE can know that CORESET#1 is transmitted from TRP#0 and CORESET#2 is transmitted from TRP#1. have. In addition, that DCI transmitted in each CORESET for which CORESETPoolIndex values are set to 0 and 1, respectively, indicates a repeated PUSCH may be implicitly indicated by a condition between specific fields in a plurality of transmitted DCIs. For example, when the HARQ process number field values in the plurality of DCIs transmitted by the base station to the terminal are the same and the NDI field values are also the same, the terminal schedules a PUSCH in which the corresponding plurality of DCIs are repeated in consideration of the multi-TRP, respectively. can be considered implicitly. On the other hand, when the HARQ process number field value is the same and the NDI field value is also the same, there may be restrictions on reception of a plurality of DCIs. For example, the maximum interval between the plurality of DCI receptions may be defined within the number of one or more specific slots or within the number of one or more specific symbols. In this case, the UE may perform PUSCH transmission based on the calculated (or checked) minimum transport block size based on time/frequency resource allocation information indicated differently in a plurality of DCIs.

<Example 5-3: Repeated transmission method of Configured grant PUSCH considering multiple TRP>

As an embodiment of the present disclosure, in embodiment 5-3, a method of repeatedly transmitting a configured grant PUSCH in consideration of multiple TRPs will be described. The UE may report to the base station with the UE capability whether or not to repeatedly transmit a configured grant PUSCH in consideration of multiple TRPs. The base station uses the following various methods for repeated transmission of a configured grant PUSCH in consideration of multiple TRPs to set the UE as higher layer signaling, or instruct L1 signaling, or set and instruct using a combination of higher layer signaling or L1 signaling. can

[Method 1] Activate single DCI-based single configured grant setting

Method 1 is a method of instructing the UE to a plurality of SRIs or TPMIs based on the single DCI, and activating a single configured grant setting along with the corresponding instruction. The method of indicating a plurality of SRIs or TPMIs with a single DCI may follow the method of the 5-1 embodiment, and if there is only one grant configuration configured for the terminal, the HARQ process number field and the redundancy version field in the corresponding DCI All bits may be indicated as 0. If there are a plurality of configured grant settings in the terminal and one of them is activated as the corresponding DCI, the HARQ process number field in the corresponding DCI may indicate the index of the configured grant setting, and all bits of the redundancy version field are indicated by 0. can be The UE may use a plurality of SRIs or TPMIs indicated by a single DCI to map a transmission beam and a transmission precoder to each of the activated configured grant PUSCH repeated transmissions according to a transmission beam mapping method.

[Method 2] Enable multiple DCI-based single configured grant settings

Method 2 is a method of instructing the UE to each SRI or TPMI based on the multiple DCI, and activating a single configured grant setting along with the corresponding instruction. The method of indicating each SRI or TPMI based on the multiple DCI may follow the method of the 5-2 embodiment, and if there is only one grant configuration configured for the terminal, all HARQ process number fields in the corresponding multiple DCI and All bits of the redundancy version field may be indicated as 0. If there are a plurality of configured grant settings in the terminal and one of them is activated as the corresponding multiple DCI, all HARQ process number fields in the multiple DCI may indicate the index of the same configured grant setting, and all redundancy in the multiple DCI All bits of the version field may be indicated as 0. According to the condition of the DCI field during repeated multi-DCI-based PUSCH transmission, the NDI field in addition to the HARQ process number field may also have the same value. The UE may use a plurality of SRIs or TPMIs indicated by multiple DCIs to map a transmission beam and a transmission precoder to each of the activated configured grant PUSCH repeated transmissions according to a transmission beam mapping method. For example, the transmit beam and transmit precoder related information indicated by the first received DCI are SRI#1 and TPMI#1, and the transmit beam and transmit precoder related information indicated by the second received DCI is SRI #2 and TPMI#2, and if the transmission beam mapping method set for upper layer signaling is cyclical, the UE includes SRI#1 and PUSCH transmission may be performed by applying TPMI#1 and applying SRI#2 and TPMI#2 to even-numbered transmissions (2, 4, 6, ...) of repeated transmission.

[Method 3] Activation of multiple DCI-based multiple configured grant settings

Method 3 is a method of instructing the UE to each SRI or TPMI based on the multiple DCI, and activating multiple configured grant settings along with the corresponding indication. A method of indicating each SRI or TPMI based on multiple DCI may follow the method of the 5-2 embodiment, and when a plurality of configured grant settings exist in the terminal, each through the HARQ process number field in each DCI You can indicate the index of the configured grant setting of. In addition, all bits of all redundancy version fields in the corresponding multi-DCI may be indicated as 0. According to the condition of the DCI field during repeated multi-DCI-based PUSCH transmission, the NDI field in addition to the HARQ process number field may also have the same value. The terminal may receive MAC-CE signaling indicating (command) the connection between a plurality of configured grant settings activated by multiple DCI. The UE can receive multiple DCIs from the base station 3 ms after performing HARQ-ACK transmission for MAC-CE signaling, and if the configured grant configuration index indicated by each DCI indicates a connection through the MAC-CE signaling If the (command) matches the received configured grant configuration indexes, PUSCH repeated transmission in consideration of multiple TRP can be performed based on the indicated configured grant settings. At this time, some settings may be shared with the same value among a plurality of connected grant settings. For example, repK, which is higher layer signaling, which means the number of repeated transmissions, repK-RV, which is higher layer signaling, which means the order of redundancy version during repeated transmission, and periodicity, which is higher layer signaling, which means the period of repeated transmission, is connected to a configured grant It can be set to have the same value within the setting.

<Example 5-4: SRS resource set setting method for PUSCH repeated transmission considering multiple TRP>

As an embodiment of the present disclosure, in embodiment 5-4, a method of configuring an SRS resource set for repeated PUSCH transmission in consideration of multiple TRP will be described. Since the power control parameters of the SRS (eg, alpha, p0, pathlossReferenceRS, srs-PowerControlAjdustmentStates, etc., which can be set by higher layer signaling) may vary for each SRS resource set, SRS for each TRP during repeated PUSCH transmission considering multiple TRPs For the purpose of different power control of the SRS resource set, the number of SRS resource sets is increased to two or more, and different SRS resource sets can be used for the purpose of supporting different TRPs. The SRS resource set setting method considered in this embodiment may be applied to the 5-1 to 5-3 embodiments.

In case of repeated PUSCH transmission considering multiple TRP based on a single DCI, a plurality of SRIs indicated by a single DCI may be selected from among SRS resources existing in different SRS resource sets. For example, if two SRIs are indicated by a single DCI, the first SRI may be selected from SRS resource set #1, and the second SRI may be selected from SRS resource set #2.

In case of repeated PUSCH transmission considering multiple DCI-based multiple TRPs, each SRI indicated by two DCIs can be selected from among SRS resources existing in different SRS resource sets, and each SRS resource set means each TRP It can be explicitly or implicitly connected (corresponding) to higher layer signaling (eg CORESETPoolIndex). As an explicit connection method, the CORESETPoolIndex value may be set in the setting of the SRS resource set set to the upper layer to notify the UE of the semi-static connection state between the CORESET and the SRS resource set. As another example, as a more dynamic explicit connection method, MAC-CE that activates the connection between a specific CORESET (including all cases where the value of CORESETPoolIndex is set to 0 or 1 or not set) and the SRS resource set can also be used. After receiving the MAC-CE that activates the connection between the specific CORESET (including all cases where the value of CORESETPoolIndex is set to 0 or 1 or not set) and the SRS resource set, the UE transmits the HARQ-ACK 3 ms From then on, it can be considered that the connection between the CORESET and the SRS resource set is activated. The implicit method is to assume an implicit connection state using a specific criterion between the CORESETPoolIndex and the index of the SRS resource set. For example, if it is assumed that the terminal has received two sets of SRS resource set #0 and #1, the terminal assumes that CORESETPoolIndex is not set or is connected to SRS resource set #0 with CORESETs set to 0, and CORESETPoolIndex is set to 1 It can be assumed that SRS resource set#1 is connected to the set CORESET.

For the above single or multiple DCI-based methods, a terminal that has been explicitly or implicitly configured or instructed to connect with each TRP with a different SRS resource set srs-PowerControlAdjustmentStates set as higher layer signaling in each SRS resource set You can expect it to be set to sameAsFci2 for the value, not to be set to separateClosedLoop. In addition, it can be expected that the usage set for upper layer signaling in each SRS resource set is set equally to codebook or noncodebook.

<Example 5-5: Dynamic switching method for determining PUSCH transmission considering single TRP or PUSCH transmission considering multiple TRPs based on codebook>

As an embodiment of the present disclosure, embodiments 5-5 describe a dynamic switching method for determining PUSCH transmission considering single TRP based on codebook or PUSCH transmission considering multiple TRPs.

The base station receives a terminal capability report from a terminal capable of performing repeated codebook-based PUSCH transmission in consideration of single DCI-based multiple TRP according to embodiments 5-1 and 5-4, and repeats PUSCH through multiple TRPs. Upper layer signaling for performing transmission may be transmitted to the terminal. At this time, in the case of repeated PUSCH transmission in consideration of multiple TRP based on single DCI as in the 5-4 embodiment, the base station transmits a single DCI including a plurality of SRI fields to indicate SRS resources existing in different SRS resource sets. It can be transmitted to the terminal. In this case, each of the plurality of SRI fields may be interpreted in the same way as in NR Release 15/16. More specifically, the first SRI field may select an SRS resource from the first SRS resource set, and the second SRI field may select an SRS resource from the second SRS resource set. Similar to the plurality of SRI fields, in order to repeatedly transmit the PUSCH in consideration of multiple TRPs, the base station may select a TPMI corresponding to the SRS resource indicated by each SRI field. Single DCI including a plurality of TPMI fields It can be transmitted to the terminal. In this case, the plurality of TPMI fields may be indicated through the same DCI as the DCI including the plurality of SRI fields described above. On the other hand, a plurality of TPMIs to be used when transmitting a PUSCH to each TRP may be selected through the following methods using a plurality of TPMI fields:

[Method 1] Each TPMI field may be interpreted in the same way as in NR Release 15/16. For example, the first TPMI field may indicate the TPMI index and layer information for the SRS resource indicated by the first SRI field, and the second TPMI field is the TPMI index for the SRS resource indicated by the second SRI field and Layer information can be indicated. In this case, the first TPMI field and the second TPMI field may indicate the same layer information.

[Method 2] The first TPMI field may indicate the TPMI index and layer information for the SRS resource indicated by the first SRI field in the same manner as in NR Release 15/16. In contrast, since the second TPMI field selects the TPMI index for the same layer as the layer indicated by the first TPMI field, layer information may not be indicated, and TPMI index information for the SRS resource indicated by the second SRI field can be instructed.

Meanwhile, when a plurality of TPMIs are selected through method 2, the bit length of the second TPMI field may be smaller than that of the first TPMI field. This is because the second TPMI field indicates a value (index) of one of the TPMI index candidates identical to the layer indicated by the first TPMI field, and thus may not indicate layer information.

The UE may support a dynamic switching method of receiving a single DCI including a plurality of SRI fields and a plurality of TPMI fields and determining repeated PUSCH transmission in consideration of multiple TRPs or repeated PUSCH transmission in consideration of single TRP based on this. The UE may support dynamic switching by using a reserved value that has no meaning among a plurality of TPMI fields or SRI fields included in the received DCI. For example, if the bit length of the SRI field is 2 bits, a total of 4 cases may be expressed, and each expressible case may be defined as a code point. In addition, if 3 codepoints out of 4 codepoints have a meaning of which SRI to indicate and the remaining 1 codepoint has no meaning, this codepoint is said to be a codepoint indicating a reserved value. (In the following description, a code point indicating a reserved value can be expressed as being set as reserved). It will be described in more detail through the content to be described later.

In order to describe a dynamic switching method that can be supported by a plurality of TPMI fields through a reserved value as a specific example, it is assumed that the number of PUSCH antenna ports is 4. In addition, it is assumed that the first TPMI field consists of 6 bits, the upper layer parameter codebookSubset is set to fullyAndPartialAndNonCoherent, and is indicated in the same way as in NR Release 15/16. In this case, in the first TPMI field, indices 0 to 61 may be set to indicate valid TPMI indexes and layer information, and indices 62 to 63 may be set as reserved. If the second TPMI field includes only TPMI index information excluding layer information as in Method 2, the second TPMI field indicates that the layer for PUSCH transmission has one value (eg, 1 to 4 according to the first TPMI field). only one of the values of the TPMI index). In this case, the number of bits of the second TPMI field may be set based on the number of bits capable of expressing the layer with the most candidates among TPMI index candidates that can be set for each layer. For example, according to an example in which the candidates of layer 1 are 0 to 27, the candidates of the layer 2 are 0 to 21, the candidates of the layer 3 are 0 to 6, and the candidates of the layer 4 are 0 to 4, the candidate of the layer 1 is the most many. Accordingly, the number of bits of the second TPMI field may be set to 5 according to the number of TPMI index candidates of layer 1. The second TPMI field configuration will be described in detail. If the first TPMI field and the corresponding TPMI index are indicated by the first TPMI field, the UE sets the second TPMI field to one of the TPMI indexes 0 to 27 for the first layer. It can be interpreted as a code point indicating and a code point indicating a reserved value. For example, if the first TPMI field indicates layer 2 and a corresponding TPMI index, the UE sets the second TPMI field to a code point indicating one of TPMI indices 0 to 21 for layer 2 and a reserved value It can be interpreted as a code point pointing to . Also, for example, when the first TPMI field indicates the 3rd or 4th layer and the corresponding TPMI index, the UE may interpret the second TPMI field similarly to the above. In this case, when two or more codepoints indicating a reserved value exist in the second TPMI field other than a codepoint indicating a TPMI index, codepoints indicating the two reserved values may be used to indicate dynamic switching. That is, among the code points of the second TPMI field composed of 5 bits, the second to last code point corresponding to the code point indicating the reserved value (ie, the 31st code point in the example) is the first TRP, and PUSCH repetition considering a single TRP. It is used to indicate transmission and the last codepoint (ie, the 32nd codepoint in the example) may be used to indicate repeated PUSCH transmission considering a single TRP as the second TRP. In this case, the UE may receive layer information and TPMI index information for repeated PUSCH transmission considering a single TRP as the first TPMI field. On the other hand, the above-described assumptions are for convenience of description, and the present disclosure is not limited thereto.

For convenience of explanation, if the above specific example for two TRPs is generalized and described, the terminal receives a single DCI including two SRI fields and two TPMI fields, and according to the code point indicated by the second TPMI field Dynamic switching can be performed. If the codepoint of the second TPMI field indicates the TPMI index for the layer indicated by the first TPMI field, the UE may perform repeated PUSCH transmission in consideration of multiple TRPs. If the second TPMI field indicates the second to last codepoint corresponding to the codepoint indicating the reserved value, the UE may perform repeated PUSCH transmission considering a single TRP for TRP 1, and codebook-based PUSCH transmission You can check the layer information and TPMI index information for the TPMI from the first TPMI field. If the second TPMI field indicates the last code point corresponding to the code point indicating the reserved value, the UE may perform repeated PUSCH transmission considering a single TRP for TRP 2, and layer information for codebook-based PUSCH transmission and TPMI index information can be checked from the first TPMI field.

Meanwhile, although the above-described example uses two reserved code points at the end of the second TPMI field to indicate dynamic switching, the present embodiment is not limited thereto. That is, dynamic switching can be indicated by using codepoints indicating two different reserved values of the second TPMI field, and repeated PUSCH transmission considering a single TRP for TRP 1 or repeated PUSCH transmission considering a single TRP for TRP 2 is performed. It can be indicated by mapping to a code point indicating a reserved value.

In addition, although the above-described example describes a case in which the second TPMI field is determined by method 2, even when the second TPMI field is determined to be the same as in NR Release 15/16 as in method 1, the reserved code of the TPMI is the same as in the above-described example. Dynamic switching can be supported using points.

For example, if the number of code points indicating the reserved value of the second TPMI field is less than 2, the number of bits of the second TPMI field is increased by 1, and the second to last code point and the last code point are based on the increased number of bits. can be used to support dynamic switching.

When two TPMI fields are determined as in method 1, a method for supporting dynamic switching may be additionally considered depending on whether each TPMI field is indicated by a code point indicating a reserved value. That is, if the first TPMI field is indicated by a code point indicating a reserved value, the UE may perform repeated PUSCH transmission considering a single TRP for TRP 2, and if the second TPMI field is indicated by a code point indicating a reserved value, the UE may perform PUSCH repeated transmission considering a single TRP for TRP 1. If both TPMI fields indicate a code point for a TPMI rather than a code point indicating a reserved value, the UE may perform repeated PUSCH transmission in consideration of multiple TRPs. If there is no codepoint having a reserved value, the number of bits of the TPMI field is increased by 1, and the last codepoint can be used for supporting dynamic switching based on the increased number of bits.

On the other hand, as another method of supporting dynamic switching, dynamic switching is instructed by two SRI fields, and layer information and TPMI index information for repeated PUSCH transmission considering multiple TRP or single TRP from two TPMI fields are checked by the UE. can If one or more codepoints indicating a reserved value exist in each SRI field, dynamic switching may be supported depending on whether a corresponding SRI field indicates a codepoint indicating a reserved value. If the first SRI field indicates a code point indicating a reserved value and the second SRI field indicates an SRS resource of the second SRS resource set, the UE may perform repeated PUSCH transmission considering a single TRP for TRP 2. have. In this case, the UE may check layer information and TPMI index information from the first TPMI field in order to perform repeated PUSCH transmission considering a single TRP for TRP 2. If the second SRI field indicates a code point indicating a reserved value and the second SRI field indicates an SRS resource of the second SRS resource set, the UE performs PUSCH repeated transmission considering a single TRP for TRP 1. can In this case, the UE may check layer information and TPMI index information from the first TPMI field in order to perform repeated PUSCH transmission considering a single TRP for TRP 1. If both SRI fields indicate an SRS resource of each SRS resource set rather than a code point indicating a reserved value, the UE may perform repeated PUSCH transmission in consideration of multiple TRPs. At this time, the UE can check the layer information and TPMI index information from the first TPMI field to perform repeated PUSCH transmission for TRP 1, and the TPMI index from the second TPMI field to perform repeated PUSCH transmission for TRP 2 information can be checked. At this time, when transmitting the PUSCH for TRP 1 and TRP 2, the same layer may be set. If there is no codepoint indicating a reserved value in both SRI fields, the number of bits of each SRI field is increased by 1, and the last codepoint among the codepoints indicating a reserved value is supported for dynamic switching based on the increased number of bits. can be used for

<Example 5-6: Non-codebook-based dynamic switching method for determining PUSCH transmission considering single TRP or PUSCH transmission considering multiple TRP>

As an embodiment of the present disclosure, embodiments 5-6 describe a dynamic switching method for determining PUSCH transmission in consideration of non-codebook-based single TRP or PUSCH transmission in consideration of multiple TRPs.

The base station receives a terminal capability report from a terminal capable of performing non-codebook-based PUSCH repeated transmission in consideration of single DCI-based multiple TRP according to embodiments 5-1 and 5-4, and performs multiple TRPs. Higher layer signaling for performing repeated PUSCH transmission may be transmitted to the UE. At this time, in the case of repeated PUSCH transmission in consideration of multiple TRP based on single DCI as in the 5-4 embodiment, the base station transmits a single DCI including a plurality of SRI fields to indicate SRS resources existing in different SRS resource sets. It can be transmitted to the terminal. Meanwhile, the plurality of SRI fields may be selected, for example, according to the following method.

[Method 1] Each SRI field may be selected in the same way as in NR Release 15/16. For example, the first SRI field may indicate an SRS resource for PUSCH transmission in the first SRS resource set, and the second SRI field may indicate an SRS resource for PUSCH transmission in the second SRS resource set. In this case, the first SRI field and the second SRI field may indicate the same layer information.

[Method 2] The first SRI field may indicate SRS resource(s) for PUSCH transmission in the first SRS resource set in the same manner as in NR Release 15/16. The second SRI field may indicate SRS resource(s) for PUSCH transmission in the second SRS resource set for the same layer as the layer indicated by the first SRI field.

When a plurality of SRIs are selected through method 2, the bit length of the second SRI field may be smaller than that of the first SRI field. This is because the second SRI is determined among SRI candidates for the same layer as the layer determined as the first SRI field among SRI candidates for all supportable layers.

The UE may support a dynamic switching method of receiving a single DCI including a plurality of SRIs and determining repeated PUSCH transmission considering multiple TRPs or repeated PUSCH transmission considering single TRP based on the received single DCI. The UE may support dynamic switching by using a codepoint indicating reserved values of a plurality of SRI fields included in the received DCI.

In order to describe a dynamic switching method that can be supported through codepoints indicating reserved values of a plurality of SRI fields as a specific example, it is assumed that the maximum number of PUSCH antenna ports is 4 and the number of SRS resources in each SRS resource set is 4. In addition, it is assumed that the first SRI field consists of 4 bits and is indicated in the same way as in NR Release 15/16. In this case, in the first SRI region, indexes 0 to 14 may be set to indicate an SRS resource for PUSCH transmission and a layer according to the selected SRS resource, and index 15 may be set as a code point indicating a reserved value. If the second SRI field selects the same number of SRS resources as the number of layers indicated by the first SRI as in Method 2, the second SRI field has one value for the layer for PUSCH transmission according to the first SRI field. (For example, one value of 1 to 4) may indicate the SRS resource selection candidate in the case of limited. In this case, the number of bits of the second SRI field may be set based on the layer having the largest number of candidates among the number of SRS resource selection candidates for each layer. For example, the value of the SRI field indicating the SRS resource selection candidate for layer 1 is 0 to 3, and there are a total of four candidates, and the value of the SRI field indicating the SRS resource selection candidate for layer 2 is 4 to 9 There are a total of 6 candidates, the value of the SRI field indicating the SRS resource selection candidate for layer 3 is 10 to 13 in total, and the value of the SRI field indicating the SRS resource selection candidate for layer 4 is 14 in total 1 There may be two candidates. In this case, since the number of candidates for layer 2 has the largest value with a total of 6, the number of bits of the second SRI field may be set to 3. Specifically, when the second SRI field configuration is described, when the SRI value when the layer for PUSCH transmission is 1 is indicated by the first SRI field, the UE sets the second SRI field to SRI candidates 0 to 3 for layer 1 A code point indicating one of the values or other values may be interpreted as a code point having a reserved value. For example, when the SRI value when the layer for PUSCH transmission is 2 is indicated by the first SRI field, the UE sets the second SRI field to a value of one of SRI candidates 0 to 5 for the second layer. Points or other values can be interpreted as code points having a reserved value. Also, for example, when the first SRI field indicates an SRI value when the layer for PUSCH transmission is 3 or 4, the UE may interpret the second SRI field in a similar manner. In this case, if two or more codepoints indicating a reserved value exist in the second SRI field other than a codepoint indicating an SRI value according to a layer, the codepoints indicating the two reserved values may be used to indicate dynamic switching. . That is, among the codepoints of the second SRI field composed of 3 bits, the second to last codepoint corresponding to the codepoint indicating the reserved value (ie, the 7th codepoint in the example) is the first TRP, and PUSCH repetition considering a single TRP It is used to indicate transmission and the last codepoint (ie, the 8th codepoint in the example) may be used to indicate repeated PUSCH transmission considering a single TRP as the second TRP. In this case, the UE may receive an SRI for repeated PUSCH transmission considering a single TRP as the first SRI field. On the other hand, the above-described assumptions are for convenience of description, and the present disclosure is not limited thereto.

For convenience of description, if the above specific examples for two TRPs are generalized and described, the UE receives a single DCI including two SRI fields and performs dynamic switching according to the codepoint indicated by the second SRI field. have. If the codepoint of the second SRI field indicates the SRI value for the layer indicated by the first SRI field, the UE may perform repeated PUSCH transmission in consideration of multiple TRPs. If the second SRI field indicates the second to last code point corresponding to the code point indicating the reserved value, the UE may perform PUSCH repeated transmission considering a single TRP for TRP 1, and The SRI for PUSCH transmission may be identified from the first SRI field. If the second SRI field indicates the last code point corresponding to the code point indicating the reserved value, the UE may perform PUSCH repeated transmission considering a single TRP for TRP 2, and non-codebook based PUSCH transmission You can check the SRI for this from the first SRI field.

Meanwhile, in the above example, code points indicating two reserved values at the end of the second SRI field are used to indicate dynamic switching, but the present embodiment is not limited thereto. That is, dynamic switching can be indicated by using codepoints indicating two different reserved values of the second SRI field, and repeated PUSCH transmission considering a single TRP for TRP 1 or repeated PUSCH transmission considering a single TRP for TRP 2 is performed. It can be indicated by mapping to a code point indicating a reserved value.

In addition, although the above-described example describes the case in which the second SRI field is determined by method 2, even when the second SRI field is determined to be the same as in NR Release 15/16 as in method 1, the reserved SRI field is the same as in the above-described example. Dynamic switching can be supported by using a code point indicating a value.

For example, if the number of code points indicating the reserved value of the second SRI field is less than 2, the number of bits of the second SRI field is increased by 1, and the second to last code point and the last code point are calculated based on the increased number of bits. It can be used to support dynamic switching.

When two SRI fields are determined as in method 1, a method of supporting dynamic switching may be additionally considered depending on whether each SRI field is indicated by a code point indicating a reserved value. That is, if the first SRI field is indicated by a code point indicating a reserved value, the UE can perform repeated PUSCH transmission considering a single TRP for TRP 2, and if the second SRI field is indicated by a code point indicating a reserved value , the UE may perform repeated PUSCH transmission considering a single TRP for TRP 1. If both SRI fields indicate a code point for indicating an SRI rather than a code point indicating a reserved value, the UE may perform repeated PUSCH transmission in consideration of multiple TRPs. If there is no codepoint indicating the reserved value, the number of bits of the SRI region is increased by 1, and the last codepoint may be used for supporting dynamic switching based on the increased number of bits.

17 illustrates operations of a base station and a terminal for repeated PUSCH transmission in consideration of multiple TRP based on single DCI transmission in which a plurality of SRI or TPMI fields exist according to an embodiment of the present disclosure. The terminal supports whether to support repeated PUSCH transmission in consideration of single DCI-based multiple TRP, whether to support multiple SRI or TPMI fields, and whether to support dynamic switching between single/multi-TRP operations using the corresponding fields, and when changing a transmission beam to be described later in the second embodiment A UE capability report is performed on the transient offset related information (1751), and the base station receiving the corresponding UE capability report (1701) transmits a PUSCH repeated transmission configuration considering a single DCI-based multiple TRP to the UE (1702). At this time, as the transmitted configuration information, the repeated transmission method, the number of repeated transmissions, the transmission beam mapping unit or method, whether a plurality of SRI or TPMI fields can be supported, the SRS resource set for a plurality of codebooks or non-codebooks, and the second embodiment below When a transmission beam is changed, which will be described later in , information related to a transient offset may be included. Upon receiving the configuration, the UE may check the number of repeated transmissions of PUSCH transmission through (1752) higher layer signaling or through a time resource allocation field in DCI. At this time, if the number of repeated transmissions is not greater than 1 (1753), that is, if repeated transmission is not performed, the UE may perform the first PUSCH transmission operation (1754). The first PUSCH transmission operation uses one SRI and TPMI field in the case of codebook-based PUSCH transmission, and one SRI field in the case of non-codebook-based PUSCH transmission, that is, single transmission of PUSCH in a single TRP using one transmission beam. It may be an action to If the number of repeated transmissions is greater than 2 (1753), if the UE does not receive a plurality of SRI or TPMI field supportable configurations from the base station (1755), the UE may perform a second PUSCH transmission operation (1753) . The second PUSCH transmission operation uses one SRI and TPMI field in the case of codebook-based PUSCH transmission, and one SRI field in the case of non-codebook-based PUSCH transmission, that is, using one transmission beam to repeatedly transmit PUSCH in a single TRP. is an action to On the other hand, if the terminal has received a plurality of SRI or TPMI field supportable settings from the base station (1755), the terminal indicates a code point meaning multiple TRP-based repeated transmission through a plurality of SRI or TPMI fields in the received DCI. If a codepoint indicating a single TRP-based repeated transmission is indicated as described above in embodiments 1-5 and 1-6 (1757), the UE may perform a third PUSCH transmission operation (1758). In the third PUSCH transmission operation, the UE uses two SRI and TPMI fields in the case of codebook-based PUSCH transmission, and two SRI fields in the case of non-codebook-based PUSCH transmission. Codepoint indicating single TRP transmission among codepoints in each field. It is an operation of repeatedly transmitting the PUSCH in a specific single TRP through , that is, using one transmission beam. Therefore, repeated transmission to the first or second TRP may be indicated depending on which codepoint is indicated through a plurality of SRI or TPMI fields. If the terminal has received a plurality of SRI or TPMI field supportable settings from the base station (1755), and the terminal indicates a code point indicating multiple TRP-based repeated transmission through a plurality of SRI or TPMI fields in the received DCI (1757) ), the UE may perform a fourth PUSCH transmission operation (1759). In the fourth PUSCH transmission operation, the UE uses two SRI and TPMI fields in the case of codebook-based PUSCH transmission, and two SRI fields in the case of non-codebook-based PUSCH transmission. Code indicating transmission of a plurality of TRPs among codepoints in each field. It is an operation of repeatedly transmitting a PUSCH through a point, that is, using two transmission beams in a plurality of TRPs.

<Sixth embodiment: TPC command instruction and application method considering multiple TRP>

The UE may increase or decrease the power for PUCCH transmission by checking the configured PUCCH resource and TPC command information indicated by the PDCCH.

The base station may allocate resources of PDSCH#1 and PDSCH#2 using DCI formats 1_0, 1_1, and 1_2 of PDCCH#1. The base station may indicate a field for allocating PDSCH resources transmitted by the base station using at least one of the DCI formats 1_0, 1_1, and 1_2. In addition, the base station has information indicating a PUCCH resource for transmitting HARQ-ACK/NACK information indicating whether the UE has successfully received the PDSCH in at least one of the DCI formats 1_0, 1_1, and 1_2 (eg, PRI), and the PUCCH It may include information (eg, TPC command) instructing to adjust the power of the resource. In this case, a case in which one PUCCH resource is configured in one slot may be referred to as inter-slot repetition. In addition, a case in which a plurality of PUCCH resources are configured in one slot may be referred to as intra-slot repetition, and setting one or a plurality of PUCCH resources in one slot and determining the period is a higher layer parameter. can be set.

Basically, the HARQ ACK/NACK information transmitted by the UE is the same encoding in each of the repeated PUCCH resources (eg, PUCCH#1-1 to #1-4, PUCCH#2-1 to #2-4) set by the base station. can be transmitted via In addition, the basic uplink beamforming direction for PUCCH transmission of the UE set by the base station is determined by various parameters and indexes (eg, PUCCH-PathlossReferenceRS, referenceSignal p0-PUCCH-Id, etc.) in each higher layer parameter PUCCH-SpatialRelationInfo. can be decided. Various parameters and indices in PUCCH-SpatialRelationInfo (eg, PUCCH-PathlossReferenceRS, referenceSignal p0-PUCCH-Id, etc.) may be set as shown in Table 31 below.

[Table 31]

Hereinafter, a higher layer signaling method for repeated PUCCH/PUSCH transmission according to an embodiment of the present disclosure and a closed loop power control method performed based on a higher layer parameter set through this method will be described in detail.

Method A-1: Various upper layer settings of the base station for performing single beamforming direction and power adjustment when the terminal transmits uplink (PUCCH)

Method A-2: Setting various upper layers of the base station for performing multiple beamforming directions and power adjustment when the terminal transmits uplink (PUCCH)

Method A-3: Set various upper layers (and DCI) of the base station for performing single beamforming direction and power adjustment when the terminal transmits uplink (PUSCH)

Method A-4: Setting various upper layers (and DCI) of the base station for the terminal to perform multiple beamforming directions and power adjustment during uplink (PUSCH) transmission

When the UE transmits an uplink (PUCCH) based on a higher layer configuration such as methods A-1 and A-2, the following various methods B-1 to B-4 may be considered together. In addition, separately from A-1 and A-2, implementation of various methods B-1 to B-4 below when transmitting uplink (PUSCH) based on upper layer configuration for PUSCH such as A-3 and A-4 An example is explained together.

Method B-1: Operation in which the UE determines power adjustment in one TPC field in DCI like rel-15

Method B-2: When configured with one TPC field, the TPC value indicated to the UE selectively applies one of a plurality of PUCCH/PUSCH transmissions

Method B-3: Configure a plurality of (eg, two) TPC fields and apply the TPC value indicated to the UE to a plurality of PUCCH/PUSCH transmissions, respectively

Method B-4: Configure one TPC field indicating two TPC values and apply the TPC values indicated to the UE to a plurality of PUCCH/PUSCH transmissions, respectively

<Method A-1>

For one or more repeated PUCCH settings, the base station in one PUCCH-SpatialRelationInfo in the upper layer, the various parameters and indices (for example, PUCCH-SpatialRelationInfo, PUCCH-PathlossReferenceRS, referenceSignal p0-PUCCH-Id, closedLoopIndex of Table 31, etc.) You can set the values of a set or individually. As described above, when each parameter is set to one value instead of a plurality, the terminal may determine that information corresponding to the beamforming direction set by the base station for PUCCH transmission is the same.

As another example, for one or more repeated PUCCH settings, the base station in one PUCCH-SpatialRelationInfo in the upper layer, the various parameters and indexes (eg, PUCCH-SpatialRelationInfo, PUCCH-PathlossReferenceRS, referenceSignal p0-PUCCH-Id in Table 31) , closedLoopIndex, etc.) can be set as one set or individually. In this way, the terminal is set to one set instead of a plurality of sets for each parameter, and if one or repeated PUCCH resources allocated to correspond to the repeated PDSCH resources are repeated within one slot or within one subslot, the One set of the various parameters and indices in one configured PUCCH-SpatialRelationInfo may be applied during the designated slot or subslot. In addition, if the repeated PUCCH resource allocated to correspond to one or the repeated PDSCH resource is repeated within one slot or within one subslot, the terminal sets one of the various parameters and indexes in the one PUCCH-SpatialRelationInfo set. The set can be applied during the specified slot or subslot. As another example, even if the repeated PUCCH resource allocated to correspond to one or the repeated PDSCH resource is repeated within a plurality of slots or within a plurality of subslots, the terminal may set one of the PUCCH-SpatialRelationInfo in one of the various parameters and indexes. can be applied during the specified slot or subslot.

<Method A-2-1>

For a PUCCH operation that is repeated in one set with different beamforming directions, the base station may set one parameter or index value configured in one configured PUCCH-SpatialRelationInfo-r17. For example, as shown in Table 31, one parameter pucch-SpatialRelationInfoId may be set in the upper layer, and the closedLoopIndex corresponding to each pucch-PathlossReferenceRS-Id and p0-PUCCH-Id may be set to i0 or i1.

For example, the pucch-SpatialRelationInfoId setting value may be 1, the pucch-PathlossReferenceRS-Id setting value may be 1, the P0-PUCCH-Id setting value may be 2, and the closedLoopIndex setting value may be set to i0. In addition, the pucch-SpatialRelationInfoId setting value may be set to 2, the pucch-PathlossReferenceRS-Id setting value may be set to 2, the P0-PUCCH-Id setting value may be set to 1, and the closedLoopIndex setting value may be set to i1. In this case, as in DCI format 2_2, the DCI in the PDCCH where the command to perform the group common PUCCH-based power control is possible is based on the closedLoopIndex field 1 bit value (eg 0 or 1) whether i0 is set (0) or i1 is The terminal can check whether the setting (1) has been made.

<Method A-2-2>

For a PUCCH operation that is repeated in one set with different beamforming directions, the base station may set at least two or more parameters or index values configured in one configured PUCCH-SpatialRelationInfo-r17.

For example, it may be set as shown in Table 32 below.

[Table 32]

As shown in Table 32, it can be configured to set two parameters pucch-SpatialRelationInfoId1 and pucch-SpatialRelationInfoId2 in the upper layer, respectively. For example, by configuring two pucch-SpatialRelationInfoId1 and pucch-SpatialRelationInfoId2, parameters and index values corresponding to each pucch-SpatialRelationInfoId1 (for example, pucch-PathlossReferenceRS-Id1, p0-PUCCH-Id1, ClosedLoopIndex1, etc.) and pucch- Parameters and index values (pucch-PathlossReferenceRS-Id2, p0-PUCCH-Id2, ClosedLoopIndex2, etc.) corresponding to SpatialRelationInfoId2 may be set.

In addition, by combining nrofSlots for determining the number of repeated PUCCH transmissions and the above-described parameters, the terminal can determine information related to the beamforming direction according to the number of repetitions. For example, if the nrofSlots value is set to 2, the UE may determine that pucch-SpatialRelationInfoId1 is a resource for the first transmitted PUCCH and pucch-SpatialRelationInfoId2 is set as a resource for the second transmitted PUCCH.

According to an embodiment of the present disclosure, the configuration shown in Table 33 may be considered for a PUCCH operation that is repeated in one set with different beamforming directions.

[Table 33]

As shown in Table 33, for the PUCCH operation repeated in one set with different beamforming directions, the base station can be additionally set by using spatialRelationInfoToAddModListExt in addition to the basic setting of the configured spatialRelationInfoToAddModList, or by substituting the basic setting of spatialRelationInfoToAddModList with spatialRelationInfoToAddModList2. .

In addition, when a plurality of spatialRelationInfos are configured, a mapping relationship between a transmitted PUCCH resource and a beamforming direction may be set as shown in SpatialMapping in Table 33. For example, if the upper layer parameter SpatialMapping is set to cyclicMapping, the terminal may determine that information related to a plurality of beamforming directions set in SpatialRelationInfoToAddMod-List and patialRelationInfoToAddModListExt is set to intersect and apply. Conversely, when the upper layer parameter SpatialMapping is set to sequentialMapping, the terminal may determine that information related to a plurality of beamforming directions set in SpatialRelationInfoToAddModList and patialRelationInfoToAddModListExt is set to be sequentially applied to each other.

For example, if the value of nrofSlots is set to 4 and SpatialMapping is set to cyclicMapping, the UE uses pucch-SpatialRelationInfoId1 for resources for the first and third transmitted PUCCHs, and pucch-SpatialRelationInfoId2 for the second and fourth transmitted PUCCHs. It can be determined that it is set as a resource for

As another example, if the nrofSlots value is set to 4 and SpatialMapping is set to sequentialMapping, pucch-SpatialRelationInfoId1 is a resource for the first and second transmitted PUCCH, and pucch-SpatialRelationInfoId2 is the third and fourth transmitted PUCCH. It can be determined that it is set as a resource for

<Method A-2-3>

On the other hand, for the PUCCH operation that is repeated in one set with different beamforming directions, the base station can basically set PUCCH-SpatialRelationInfo or PUCCH-SpatialRelationInfo-r16 or PUCCH-SpatialRelationInfo-r17 in addition to the configuration using a MAC CE message. have. For example, the MAC CE message of FIG. 22 shows a method in which the MAC CE message is first initially set in the upper layer (RRC) and then additionally updated in the MAC layer according to the methods A-1 and A-2 described above.

20 is a diagram illustrating a format of a PUCCH Spatial Relation Activation/Deactivation MAC CE and an enhanced PUCCH Spatial Relation Activation/Deactivation MAC CE message.

Here, the Serving Cell ID may mean an ID of a serving cell to which the UE is connected, and the BWP ID may mean a frequency-side resource index corresponding to the BWP ID among the BWPs corresponding to the Serving Cell ID. In addition, the PUCCH resource ID may indicate a PUCCH resource corresponding to a specific PUCCH ID among PUCCH resources configured in the BWP ID.

20-00 of FIG. 20 corresponds to _i +1 of PUCCH-SpatialRelationInfoId of PUCCH-SpatialRelationInfo set to RRC, and if the value of the corresponding region is set to ₁ , PUCCH corresponding to Si set to 1 for the corresponding PUCCH Resource -PUCCH-SpatialRelationInfo set to SpatialRelationInfoId is activated.

In order to perform the above-described operation, the base station assigns Spatial Relation Info ID 1 and ID 2 indicating pucch-SpatialRelationInfoId set in the RRC to two Si regions (S ₀ , S ₁ ) in _20-00 of FIG. 20 to 1 Or, as shown in 20-20 or 20-25 of FIG. 20, MAC CE may be configured to be mapped or reconfigured to one PUCCH resource ID and transmitted to the terminal. In this case, an indicator such as C ₀ to C _N-2 may be added to indicate whether two Spatial Relation Info IDs are mapped to one PUCCH resource ID such as 20-20 or 20-25. If C ₀ is set to 1, the PUCCH resource corresponding to the corresponding PUCCH resource ID 0 is mapped to two PUCCH Spatial Relation Info IDs, and if C _N-2 is set to 0, the corresponding PUCCH resource ID N-2 is one It may be mapped to PUCCH Spatial Relation Info ID.

20-20 or 20-25 is an example of enhanced PUCCH Spatial Relation Activation/Deactivation MAC CE, and the location of _Ci for indicating whether two Spatial Relation Info IDs are mapped may be located in one of the reserved bits.

When the terminal receives the MAC CE message including Spatial Relation Info ID 1 and Spatial Relation Info ID 2, in the Spatial Relation information in the order of Spatial Relation Info ID1 and Spatial Relation Info ID2 according to the cyclicMapping or sequentialMapping set in RRC Information related to a plurality of set beamforming directions may be applied alternately or sequentially.

20 is a structure designed to additionally set and change N-1 PUCCH resource ID(s) at the same time, but if additional setting and change of spatial relation info ID among PUCCH resource ID(s) is unnecessary, Oct resource of the corresponding MAC CE may be omitted.

<Method A-3>

For one or more repeated PUSCH configuration, the base station may configure SRI-PUSCH-PowerControl as many as the number of SRI candidates in sri-PUSCH-MappingToAddModeList in PUSCH-PowerControl in a higher layer. SRI-PUSCH-PowerControl is PUSCH-PathlossReferenceRS-Id indicating PUSCH-PathlossReferenceRS, P0-PUSCH-AlphaSetId for indicating P0-PUSCH-AlphaSet in p0-AlphaSets, and the corresponding closed loop index (eg, i0 or i1). may include As such, for each SRI candidate value, the transmit power information included in the SRI-PUSCH-PowerControl may be configured through a higher layer. It may be determined that the PUSCH is transmitted according to the transmission power information included in the SRI-PUSCH-PowerControl having the SRI-PUSCH-PowerControlId having . In this case, the UE may determine that the beamforming direction of the transmitted PUSCH is the same as the beamforming direction in which the SRS resource is transmitted in the SRS resource set referenced when the base station selects the SRI. Even if the repeated PUSCH resource is repeated within a plurality of slots or within a plurality of subslots, the UE may apply the various parameters and indices in the configured one SRI-PUSCH-PowerControl during a designated slot or subslot.

<Method A-4-1>

Meanwhile, for repeated PUSCH transmission in different beamforming directions, the base station may configure two or more sri-PUSCH-MappingToAddModLists (eg, sri-PUSCH-MappingToAddModList1 or sri-PUSCH-MappingToAddModList2). SRI-PUSCH-PowerControl in each sri-PUSCH-MappingToAddModList may include transmission power parameters (PUSCH-PathlossReferenceRS-Id, P0-PUSCH-AlphaSetId, closed loop index) for each beamforming direction, that is, the corresponding TRP. The base station may indicate two or more SRI fields in DCI for scheduling repeated PUSCH transmissions having different beamforming directions. Alternatively, two srs-ResourceIndicators may be configured in upper layer configuration information for configured grant PUSCH transmission. If two SRI fields are included in the DCI, the UE is the first SRI-PUSCH-MappingToAddModList (eg, sri-PUSCH-MappingToAddModList1) SRI- having the same SRI-PUSCH-PowerControlId as the value indicated by the first SRI field. It is possible to determine the transmission power of the PUSCH transmitted for TRP 1 by referring to the PUSCH power transmission parameter in the PUSCH-PowerControl, and indicated by the second SRI field in the second sri-PUSCH-MappingToAddModList (eg, sri-PUSCH-MappingToAddModList2). The transmission power of the PUSCH transmitted for TRP 2 may be determined by referring to the PUSCH power transmission parameter in the SRI-PUSCH-PowerControl having the same SRI-PUSCH-PowerControlId as the value. That is, the UE may determine the transmission power of repeated PUSCH transmission transmitted in each beamforming direction (ie, each TRP) using two sri-PUSCH-MappingToAddModList and two SRI fields. At this time, the first SRI field is determined by the base station with reference to the first SRS resource set among the two SRS resource sets in which usage is set to 'codebook' or 'nonCodebook', and the second SRI field has usage set to 'codebook' or The base station may determine by referring to the second SRS resource set among the two SRS resource sets set as 'nonCodebook'.

<Method A-4-2>

For repeated PUSCH transmission with different beamforming directions, the base station has two or more transmission power parameters (eg, PUSCH-PathlossReferenceRS-Id1, PUSCH-PathlossReferenceRS-Id2, P0-) for SRI-PUSCH-PowerControl in one sri-PUSCH-MappingToAddModList. PUSCH-AlphaSetId1, P0-PUSCH-AlphaSetId2, closed loop index1, closed loop index2) may be set to be included. At this time, the first transmit power parameter (eg, PUSCH-PathlossReferenceRS-Id1, P0-PUSCH-AlphaSetId1, closed loop index1) may be defined as a transmit power parameter for the first beamforming direction, that is, TRP 1, and the second transmit power A parameter (eg, PUSCH-PathlossReferenceRS-Id2, P0-PUSCH-AlphaSetId2, closed loop index2) may be defined as a transmission power parameter for the second beamforming direction, that is, TRP2. The base station may indicate two or more SRI fields in DCI for scheduling repeated PUSCH transmissions having different beamforming directions. Alternatively, two srs-ResourceIndicators may be configured in upper layer configuration information for configured grant PUSCH transmission. If two SRI fields are included in DCI, the UE has the same SRI-PUSCH-PowerControlId as the value indicated by the first SRI in sri-PUSCH-MappingToAddModList The first transmit power parameter in SRI-PUSCH-PowerControl (eg: PUSCH-PathlossReferenceRS-Id1, P0-PUSCH-AlphaSetId1, closed loop index1) can be referred to determine the transmission power of the PUSCH transmitted for TRP 1, and the same SRI as the value indicated by the second SRI in sri-PUSCH-MappingToAddModList. - With reference to the second transmission power parameter (eg, PUSCH-PathlossReferenceRS-Id2, P0-PUSCH-AlphaSetId2, closed loop index2) in SRI-PUSCH-PowerControl having PUSCH-PowerControlId, the transmission power of the PUSCH transmitted for TRP 2 can decide That is, the UE sets the transmission power of repeated PUSCH transmission transmitted in each beamforming direction (ie, each TRP) as two sets of transmission power parameters in one sri-PUSCH-MappingToAddModList SRI-PUSCH-PowerControl (one SRI candidate) number) and two SRI fields. In this case, the number of candidates for each SRI field may be the same. Alternatively, if the number of candidates of each SRI field is different, the SRI-PUSCH-PowerControl may be configured according to a larger value among the number of candidates of the two fields. At this time, the first SRI field is determined by the base station with reference to the first SRS resource set among the two SRS resource sets in which usage is set to 'codebook' or 'nonCodebook', and the second SRI field has usage set to 'codebook' or The base station may determine by referring to the second SRS resource set among the two SRS resource sets set as 'nonCodebook'.

<Method A-4-3>

For repeated PUSCH transmission with different beamforming directions, the base station uses one of sri-PUSCH-MappingToAddModList among two SRS resource sets in which usage is set to 'codebook' or 'nonCodebook' SRI- containing the ID of the related SRS resource set PUSCH-PowerControl can be configured. That is, the SRI-PUSCH-PowerControl may include a related SRS resource set Id in addition to the transmission power parameters (PUSCH-PathlossReferenceRS-Id, P0-PUSCH-AlphaSetId, closed loop index). At this time, the SRI-PUSCH-PowerControl including the first SRS resource set Id among the two SRS resource sets can be defined as the transmission power parameter for the first beamforming direction, that is, TRP 1, and includes the second SRS resource set Id. SRI-PUSCH-PowerControl may be defined as a transmission power parameter for the second beamforming direction, that is, TRP 2. The base station may indicate two or more SRI fields in DCI for scheduling repeated PUSCH transmissions having different beamforming directions. Alternatively, two srs-ResourceIndicators may be configured in the upper layer for the configured grant PUSCH transmission. If two SRI fields are included in DCI, the UE is the same as the value indicated by the first SRI field among SRI-PUSCH-PowerControl including the SRS resource set Id for the first SRS resource set in sri-PUSCH-MappingToAddModList. It is possible to determine the transmission power of the PUSCH transmitted for TRP 1 by referring to the PUSCH transmission power parameter in the SRI-PUSCH-PowerControl of the second, including the SRS resource set Id for the second SRS resource set in the sri-PUSCH-MappingToAddModList The transmission power of the PUSCH transmitted for TRP 2 may be determined by referring to the PUSCH transmission power parameter in the SRI-PUSCH-PowerControl of the same number as the value indicated by the second SRI field of the SRI-PUSCH-PowerControl. This will be described as a specific example as follows. SRI-PUSCH-PowerControl with an SRI-PUSCH-PowerControlId of 0 to 7 contains the SRS resource set ID for the first SRS resource set, and SRI-PUSCH-PowerControl with an SRI-PUSCH-PowerControlId of 8 to 15 is the second SRS It may include the SRS resource set ID for the resource set. At this time, if the value of the first SRI field among the two SRI fields indicated by DCI is m (m=0,1,2,…7), the UE is in the mth of the SRI-PUSCH-PowerControl associated with the first SRS resource set. The transmission power of the PUSCH transmitted for TRP 1 is determined with reference to the transmission power parameter in the SRI-PUSCH-PowerControl in which the corresponding SRI-PUSCH-PowerControlId is m. If the value of the second SRI field among the two SRI fields indicated by DCI is p (p=0,1,2,…7), the UE corresponds to the p-th SRI-PUSCH-PowerControl associated with the second SRS resource set. -PUSCH-PowerContorolId is 8+p with reference to the transmission power parameter in the SRI-PUSCH-PowerControl to determine the transmission power of the PUSCH transmitted for TRP 2. Alternatively, two SRI-PUSCH-PowerContols having the same SRI-PUSCH-PowerContolId may exist, and each may include a different SRS resource set ID. Even if the SRI-PUSCH-PowerControlId associated with the SRS resource set is different from the above example, a similar method may be applied to map each SRI field and SRI-PUSCH-PowerContol. According to the above method, the maximum number of SRI-PUSCH-PowerContols configurable in sri-PUSCH-MappingToAddModList may increase according to the number of supported TRPs. At this time, the first SRI field is determined by the base station with reference to the first SRS resource set among the two SRS resource sets in which usage is set to 'codebook' or 'nonCodebook', and the second SRI field has usage set to 'codebook' or The base station may determine by referring to the second SRS resource set among the two SRS resource sets set as 'nonCodebook'.

Table 34 below shows the power adjustment calculation formula for PUCCH transmission.

[Table 34]

는 서빙-셀 c의 주파수 f에서의

값을 의미하고,

로 구성된 파라미터이며 higher layer signaling (RRC signaling)을 통해 기지국이 단말에게 알려주는 값이다.

에서 q_u는

의 index를 나타내며, PUCCH 전송에 사용되는 빔 또는 해당 PUCCH의 서비스 타입에 따라 (즉, eMBB 용도 또는 URLLC 용도) 서로 상이한 index를 가질 수 있다.In the table description, g(i) is a parameter for performing power control in a closed-loop, and accumulation-based power control is performed.

is the serving-cell c at the frequency f

means value,

It is a parameter composed of

in q _u is

represents an index of , and may have different indices depending on a beam used for PUCCH transmission or a service type of the corresponding PUCCH (ie, eMBB use or URLLC use).

PL, which is the path loss value calculated by the terminal, may be calculated through the received power of the downlink RS transmitted by the base station. In NR, since there is no CRS (Cell-specific Reference Signal), the PL may be measured by the UE through the RS resource indicated by the base station through q _u . For example, q _u may be a resource index of a Channel State Information-Reference Signal (CSI-RS) or a resource index of a Synchronization Signal Block (SSB) resource.

The following equation shows a power adjustment calculation equation for PUSCH transmission.

[Equation 2]

는 단말에 설정된 PUSCH transmission occasion i에 대해 지원 셀 c의 반송파 f에 대한 최대 출력 파워 (maximum output power)를 의미한다.

는 상위 레이어 파라미터로 설정되는

와 상위 레이어 설정과 SRI를 통해 설정될 수 있는

의 합을 의미한다. 여기서 j=0일 때에는 msg3를 전송하기 위한 PUSCH를 의미하여, j=1일 때에는 configured grant PUSCH를 의미하며 j={2,…J-1} 중 하나의 값이라면 grant PUSCH를 의미한다.

은 PUSCH 자원 할당에 대한 대역폭 (bandwidth),

는 PUSCH로 전송되는 정보의 타입, BPRE (Bits per resource element: RE 당 전송 비트 수)에 따라 결정되는 값이다.

와

는 각각 alpha 값과 경로 손실 참조 신호로부터 추정한 경로 손실 값으로 참조할 alpha 값과 경로 손실 참조 신호는 상위 레이어 설정과 SRI를 통해 결정될 수 있다.

는 폐쇄 루프 전력 조정 값으로 PUSCH에 대해 상위 레이어 설정과 SRI로 결정될 수 있는 폐쇄 루프 인덱스

에 대한 값을 의미한다. 여기서 PUSCH 전송을 위한 폐쇄 루프 전력 조정은 TPC command로 지시되는 값을 누적하여 적용하는 accumulation 방법과 TPC command로 지시되는 그 값을 바로 적용하는 absolute 방법으로 나누어 지원할 수 있으며 이는 상위 레이어 파라미터 tpc-Accumulation이 설정되었는지의 여부에 따라 결정될 수 있다. 상위 레이어 파라미터 tpc-Accumulation이 disabled로 설정되었으면 absolute 방법으로 PUSCH 전송을 위한 폐쇄 루프 전력 조정을 수행하고 tpc-Accumulation이 설정되지 않았으면 accumulation 방법으로 PUSCH 전송을 위한 폐쇄 루프 전력 조정을 수행한다. here

Means the maximum output power for the carrier f of the support cell c for the PUSCH transmission occasion i configured in the UE.

is set as the upper layer parameter

and upper layer settings, which can be set through SRI

means the sum of Here, when j = 0, it means a PUSCH for transmitting msg3, and when j = 1, it means a configured grant PUSCH, and j = {2, ... J-1}, it means grant PUSCH.

is the bandwidth for PUSCH resource allocation,

is a value determined according to the type of information transmitted on the PUSCH and BPRE (Bits per resource element: number of transmission bits per RE).

Wow

is the path loss value estimated from the alpha value and the path loss reference signal, respectively. The alpha value and the path loss reference signal to be referenced may be determined through upper layer configuration and SRI.

is a closed-loop power adjustment value, and a closed-loop index that can be determined by the upper layer configuration and SRI for PUSCH

means the value for Here, closed-loop power adjustment for PUSCH transmission can be supported by dividing it into an accumulation method in which a value indicated by the TPC command is accumulated and applied, and an absolute method in which the value indicated by the TPC command is directly applied. It may be determined depending on whether or not it is set. If the upper layer parameter tpc-Accumulation is set to disabled, closed-loop power adjustment for PUSCH transmission is performed by the absolute method, and closed-loop power adjustment for PUSCH transmission is performed by the accumulation method if tpc-Accumulation is not set.

Hereinafter, a method in which the power adjustment command indicated by the aforementioned TPC command is applied according to the repeated PUCCH or PUSCH resource configuration will be described in detail. First, in the upper layer setting method of closed loop power control, the base station and the terminal perform fixed closed loop power adjustment for PUCCH / PUSCH resources allocated and transmitted for a plurality of TRPs to a fixed bitwidth size. It can be set to be configured. As an example, the UE decodes the PDCCH transmitted by the base station and can understand that the TPC field is composed of 2 bits to 4 bits fixed in DCI format 1_1/1_2 /0_1/0_2. However, the above-described bit width is only an example of the present disclosure, and the TPC field may be fixed to bit information of various sizes. As another example, the base station may configure the UE in a higher layer such that the TPC field is configured with various bitwidth sizes in DCI format 1_1/1_2/0_1/0_2.

Specifically, if the UE supports the PUCCH/PUSCH operation for a plurality of TRPs, the base station may configure whether to configure one TPC field or a plurality of (eg, two) TPC fields in a higher layer. In addition, even when configuring one TPC field, the base station distinguishes whether the TPC value indicated to the terminal is applied to all PUCCH/PUSCH transmissions (Method B-1) or whether only one is selectively applied (Method B-2) can be set to Alternatively, the base station configures one of various options, such as whether to configure two TPC fields (Method B-3) or configure one TPC field to include two TPC values (Method B-4) can also be considered. At this time, a new RRC parameter (eg, ClosedLoopPC-r17 ENUMERATED {'Option-2', 'Option-3', 'Option-4'}) may be added, and if the ClosedLoopPC-r17 field is disabled or not ( absent) it may be determined that a basic option (eg, option 1) among the plurality of options is supported. That is, the size of the field constituting the TPC field in the DCI may be determined to have a bitwidth of, for example, 2 to 4 bits by the above option. On the other hand, in the present disclosure, ClosedLoopPC means information indicating a method of applying the TPC. In the present disclosure, any one of Option-2 to Option-4 is indicated as a new RRC parameter and Option-1 is supported as a basic option. Although the method is described by way of example, the scope of the present disclosure is not limited thereto. That is, depending on the options that can be considered, the options that the ClosedLoopPC can indicate can be set in various ways, and it can be set to one of Option-2 to Option-4 instead of Option-1 as a basic option, and to be indicated as a new RRC parameter. A method of setting possible candidates to all or some of the remaining options other than the default option may also be used.

The base station may transmit DCI signaling or MAC CE message based on the TPC command related information newly set through the upper layer.

Here, the TPC command related information newly set through the upper layer may be configuration information on which specific beam among a plurality of beams is applied to the TPC field value. For example, if the newly set TPC command related parameter value is 0, the UE may determine to apply the TPC command indicated to the first or odd-numbered beam among the repeatedly transmitted PUCCH beams. As another example, if the newly set TPC command related parameter value is 1, the UE may determine to apply the TPC command indicated to the second or even-numbered beam among repeatedly transmitted PUCCH or PUSCH beams.

In addition, the TPC command related information newly set through the upper layer may be configuration information on whether a setting value corresponding to TPC execution is newly added or applied to a specific beam (eg, the second) that is changed. For example, the most basic TPC setting value is basically applied to the first beam in one slot, and whether TPC is applied to other additionally configured beams (eg, the second beam) is determined based on the value of the TPC command related information. can judge For example, if the newly added TPC command related parameter value is 0, the UE may not apply the TPC command indicated to the second or even-numbered beam among the repeatedly transmitted PUCCH beams. As another example, if the newly added TPC command related parameter value is 1, the UE may determine to apply the TPC command indicated to the second or even-numbered beam in another slot/subslot among repeatedly transmitted PUCCH or PUSCH beams. Can be determined. .

<Method B-1: When configured with one TPC field, one indicated TPC value is applied to all PUCCH/PUSCH transmissions>

값을 이용하여 전력의 증가 또는 감소의 정도를 지시하는 값) 정보를 수신하고, 이때 단말이 수신한 TPC command 필드의 bitwidth 사이즈는 2bits(TPC command for scheduled PUCCH)로 유지될 수 있다. TPC command 필드의 bitwidth가 2bits로 고정되고, 방법 A-1 내지 A-2에서 설명된 다양한 실시예들과 같이 반복되는 PUCCH resource에 대응되는 빔포밍 방향을 설정하기 위해, 상위 레이어에서 Spatialrelationinfo가 한 개 설정되면, 상기 PUCCH 전송을 위한 폐쇄루프 전력 제어 방법이 필요하다. The UE uses the TPC command (in DCI format 1_0, 1_1, or 1_2 to schedule the PUCCH)

A value indicating the degree of increase or decrease in power using a value) information is received, and at this time, the bitwidth size of the TPC command field received by the terminal may be maintained as 2 bits (TPC command for scheduled PUCCH). The bitwidth of the TPC command field is fixed to 2 bits, and in order to set the beamforming direction corresponding to the PUCCH resource that is repeated as in various embodiments described in methods A-1 to A-2, there is one Spatialrelationinfo in the upper layer. If configured, a closed-loop power control method for the PUCCH transmission is required.

값을 이용하여 전력의 증가 또는 감소의 정도를 지시하는 값) 정보를 수신하고, 이때 단말이 수신한 TPC command 필드의 bitwidth 사이즈는 2bits(TPC command for scheduled PUCCH)로 유지될 수 있다. TPC command 필드의 bitwidth가 2bits로 고정되고, 방법 A-3 내지 A-4에서 설명된 다양한 실시예들과 같이 반복되는 PUSCH resource에 대응되는 빔포밍 방향을 설정하기 위해, 상위 레이어에서 SRI-PUSCH-PowerControl가 설정되면, 상기 PUSCH 전송을 위한 폐쇄루프 전력 제어 방법이 필요하다. The UE uses the TPC command (

A value indicating the degree of increase or decrease in power using a value) information is received, and at this time, the bitwidth size of the TPC command field received by the terminal may be maintained as 2 bits (TPC command for scheduled PUCCH). The bitwidth of the TPC command field is fixed to 2 bits, and in order to set the beamforming direction corresponding to the PUSCH resource that is repeated as in various embodiments described in methods A-3 to A-4, in the upper layer, the SRI-PUSCH- When PowerControl is configured, a closed-loop power control method for the PUSCH transmission is required.

또는

의 값을 -1 (dB)로 설정할 수 있다. 또한, 단말이 수신한 DCI 내 TPC command field 값이 미리 정해진 값 (예를 들어, 01)이면, 단말은 DCI에서 스케줄링하는 반복되는 모든 PUCCH/PUSCH resource에 대해 전력을 동일하게 유지하도록 적용할 수 있다. 이때 감소량은 상기 PUCCH/PUSCH 전송 전력을 결정하는 수식에서 Accumulated

또는

의 값을 0 (dB)로 설정할 수 있다. 또한, 단말이 수신한 DCI 내 TPC command field 값이 미리 정해진 값 (예를 들어, 10또는 11)이면 단말은 DCI에서 스케줄링하는 반복되는 모든 PUCCH/PUSCH resource에 대해 전력 증가를 동일하게 적용할 수 있다. 이때 증가량은 상기 PUCCH/PUSCH 전송 전력을 결정하는 수식에서 Accumulated

또는

의 값을 1/3 (dB)로 설정할 수 있다. As an example, if the value of the TPC command field in the DCI received by the terminal is a predetermined value (eg, 00), the terminal may equally apply power reduction to all repeated PUCCH / PUSCH resources scheduled in DCI. . At this time, the amount of power reduction is accumulated in the equation for determining the PUCCH/PUSCH transmission power described in Table 34 above.

or

can be set to -1 (dB). In addition, if the TPC command field value in the DCI received by the terminal is a predetermined value (eg, 01), the terminal may be applied to maintain the same power for all repeated PUCCH / PUSCH resources scheduled in DCI. . At this time, the amount of reduction is accumulated in the equation for determining the PUCCH/PUSCH transmission power.

or

can be set to 0 (dB). In addition, if the TPC command field value in the DCI received by the terminal is a predetermined value (eg, 10 or 11), the terminal may apply the same power increase to all repeated PUCCH / PUSCH resources scheduled in DCI. . At this time, the amount of increase is accumulated in the equation for determining the PUCCH/PUSCH transmission power.

or

can be set to 1/3 (dB).

또는

의 값을 -1 (dB)로 반복 전송되는 횟수만큼 감소 또는 증가를 반영하도록 설정할 수 있다. 또한, 단말이 수신한 DCI 내 TPC command field 값이 미리 정해진 값 (예를 들어, 10 또는 11)이면 단말은 DCI에서 스케줄링하는 반복되는 모든 PUCCH resource에 대해 전력 증가를 점차(recursively)적으로 반복 적용할 수 있다. 이때 증가량은 상기 PUCCH 전송 전력을 결정하는 수식에서 Accumulated

또는

의 값을 1 dB (TPC command field 값이 10이라면) 또는 3 dB (TPC command field 값이 11이라면)로 반복 전송되는 횟수만큼 감소 또는 증가를 반영하도록 설정할 수 있다.As another example, if the TPC command field value in the DCI received by the terminal is a predetermined value (eg, 00), the terminal gradually reduces power for all repeated PUCCH / PUSCH resources scheduled in DCI (recursively) Can be applied repeatedly. At this time, the amount of reduction is accumulated in the equation for determining the PUCCH transmission power.

or

The value of -1 (dB) can be set to reflect the decrease or increase by the number of repeated transmissions. In addition, if the value of the TPC command field in the DCI received by the terminal is a predetermined value (eg, 10 or 11), the terminal gradually applies a power increase to all repeated PUCCH resources scheduled in the DCI (recursively). can do. At this time, the amount of increase is accumulated in the equation for determining the PUCCH transmission power.

or

The value of can be set to reflect the decrease or increase by the number of repeated transmissions in 1 dB (if the value of the TPC command field is 10) or 3 dB (if the value of the TPC command field is 11).

<Method B-2: When configured with one TPC field, the TPC value indicated to the terminal selectively applies one of a plurality of PUCCH/PUSCH transmissions>

또는

값을 이용하여 전력의 증가/감소의 정도를 지시하는 값) 정보를 포함하는 bit width를 2bits (TPC command for scheduled PUCCH/PUSCH)로 고정하여 할당될 수 있다. 여기서 방법 B-1과의 차이점은 신규/변경된 상위 레이어 정보를 기반으로 TPC 동작을 수행하게 되는 것이다. 즉, 상위 레이어에서 신규로 설정된 TPC command 관련/연계 정보는 TPC 조정 값의 적용을 복수의 타이밍 또는 복수의 빔 중에서 어떤 특정 타이밍 또는 빔에 적용하는지에 대한 명시적인 설정 정보이거나 기본 타이밍 또는 빔의 동작에 추가적인 특정 타이밍 또는 빔(예: 두 번째)에 적용하는지에 대한 명시적인 설정 정보일 수 있다.In the DCI signaling method, basically one TPC field may exist in DCI. In addition, the indicated TPC value may be applied to the first PUCCH/PUSCH resource transmitted for the first TRP at the first timing point (eg, the first slot/subslot). In addition, the indicated TPC value is a second PUCCH / PUSCH resource different from the first PUCCH / PUSCH resource transmitted for the second TRP at the second timing point (eg, the first slot / subslot or the second slot / subslot) can be applied to Specifically, the base station uses the DCI format 1_0, 1_1, or 1_2 and the TPC command (

or

A value indicating the degree of increase/decrease in power using a value) may be assigned by fixing a bit width including information to 2 bits (TPC command for scheduled PUCCH/PUSCH). Here, the difference from method B-1 is that the TPC operation is performed based on new/changed higher layer information. That is, the TPC command related/association information newly set in the upper layer is explicit configuration information on whether the application of the TPC adjustment value is applied to a specific timing or beam among a plurality of timings or a plurality of beams, or a basic timing or operation of a beam It may be additional specific timing or explicit configuration information on whether to apply to a beam (eg, the second).

For example, if the TPC command related parameter value newly set through the upper layer is 0, the UE may determine to apply the TPC command indicated to the first or odd-numbered timing or beam among repeatedly transmitted PUCCH/PUSCH beams. As another example, if the TPC command related parameter value newly set through the upper layer is 1, the UE may determine to apply the TPC command indicated to the second or even-numbered timing or beam among repeatedly transmitted PUCCH/PUSCH beams. In this case, the information received in the TPC field in the DCI may be applied to the transmission timing or beamforming direction corresponding to the parameter value related to the new TPC command.

As another example, the UE may determine that the information received in the TPC field in the DCI is basically applied in the first beamforming direction at the first or odd-numbered timing. If the value of the newly added TPC command related parameter set to the terminal is 0, it can be understood that the terminal does not apply the TPC command in the second beamforming direction at the second or even-numbered timing. If the value of the newly added TPC command related parameter set in the terminal is 1, it can be understood that the terminal applies the TPC command at the second or even-numbered timing in the second beamforming direction. The timing points described above may be considered to operate over the same slot/subslot or multiple slots/subslots.

As another example, if the DCI for the TPC command is 2 bits, and one Spatialrelation-info for configuring the beamforming direction is set in the PUCCH resource that is repeated like various embodiments of the method A, power adjustment for the PUCCH transmission is a plurality of A method selectively performed for PUCCH resources may be required.

At this time, if the TPC command field value in the DCI received by the terminal is a predetermined value (eg, 00), the power for PUCCH transmission is reduced for at least a part of the total number of repeated transmissions of the configured PUCCH resource. Or it can be increased. For example, if the total number of repetitions is 2, power adjustment may be applied only to the initial transmission or the last transmission. For example, if the total number of repetitions is 4, power adjustment may be applied to the initial 1 or 2 transmissions or 3 or 4 transmissions.

의 값을 -1 (dB)로 반복 전송되는 횟수만큼 감소 또는 증가를 반영하도록 설정될 수 있다. 또한, 단말이 수신한 DCI 내 TPC command 필드 값이 미리 정해진 값 (예를 들어, 10/11)이면 단말은 DCI에서 스케줄링하는 반복되는 모든 PUCCH resource에 대해 전력 증가를 점차(recursively)적으로 반복 적용할 수 있다. 반대로 증가하는 경우도 유사하게 적용될 수 있다.As another example, if the value of the TPC command field in the DCI received by the terminal is a predetermined value (eg, 00), the terminal gradually applies power reduction to all repeated PUCCH resources scheduled in DCI (recursively) repeatedly. can do. At this time, the amount of power reduction is accumulated in the equation for determining the PUCCH transmission power.

The value of -1 (dB) may be set to reflect the decrease or increase as many times as the number of repeated transmissions. In addition, if the value of the TPC command field in the DCI received by the terminal is a predetermined value (eg, 10/11), the terminal gradually applies a power increase to all repeated PUCCH resources scheduled in the DCI (recursively) repeatedly. can do. Conversely, the case of increasing may be similarly applied.

As another example, repeated PUCCH transmission to which the TPC command information in the DCI received by the UE is to be applied may be determined in an implicit method based on other transmission power control parameters. For example, the UE may determine the repeated PUCCH transmission to which the TPC command is applied according to the repetition period of the path loss reference signal (PL RS) determined by the two PUCCH-SpatialRelationInfo for repeatedly transmitting the PUCCH to two TRPs. If two PUCCH-SpatialRelationInfo are activated for one PUCCH resource, and the reference signal of PUCCH-PathlossReferenceRS according to each PUCCH-SpatialRelationInfo is set to another NZP CSI-RS having a different period, the terminal transmits the TPC command in the received DCI. The longer period of the NZP CSI-RS may be applied to the repeated PUCCH transmission transmitted by the UE according to the PUCCH-SpatialRelationInfo set as the reference signal of the PUCCH-PathlossReferenceRS.

As another example, the terminal compares the most recent reception times of the reference signals set in PUCCH-PathlossReferenceRS of each PUCCH-SpatialRelationInfo based on the time before receiving the DCI including the TPC command regardless of the reference signal period and applying the TPC command. It is possible to determine the repeated PUCCH transmission to be performed. That is, if the most recently received reference signal for the first PUCCH-SpatialRelationInfo is received earlier than the most recently received reference signal for the second PUCCH-SpatialRelationInfo, the TPC command repeats the PUCCH according to the first PUCCH-SpatialRelationInfo It can be applied to transmission.

Similar to the above, repeated PUSCH transmission to which the TPC command information in the DCI received by the UE is applied may be determined in an implicit method based on other transmission power control parameters. The UE may determine the repeated PUSCH transmission to which the TPC command is applied according to the repetition period of the path loss reference signal (PL RS) determined based on the two SRIs for repeatedly transmitting the PUSCH to the two TRPs. If the reference signals of the two PUSCH-PathlossReferenceRS determined based on the two SRIs are set to different NZP CSI-RSs having different periods, the UE transmits the TPC command in the received DCI to the NZP CSI-RS with a longer period to PUSCH- It can be applied to repeated PUSCH transmission transmitted by the UE according to the SRI-PUSCH-PowerControl set as the reference signal of PathlossReferenceRS.

As another example, the terminal compares the most recent reception time of the reference signals set in PUSCH-PathlossReferenceRS of each SRI-PUSCH-PowerControl with respect to the time before receiving the DCI including the TPC command regardless of the period of the reference signal to compare the TPC command PUSCH repeated transmission to which to apply may be determined. That is, the reference signal for the most recently received PUSCH-PathlossReferenceRS of the SRI-PUSCH-PowerControl for the first SRI is higher than the reference signal for the most recently received PUSCH-PathlossReferenceRS of the SRI-PUSCH-PowerControl for the second SRI. If received earlier, the TPC command may be applied to repeated PUSCH transmission according to SRI-PUSCH-PowerControl for the first SRI.

<Method B-3: Configure a plurality of (eg, two) TPC fields and apply the TPC value indicated to the UE to a plurality of PUCCH/PUSCH transmissions, respectively>

In the DCI signaling method, it is a basic principle that a new second TPC field similar to the first TPC field is used, and in the case of FR2, the first TPC field may be applied to PUCCH transmission associated with the first PUCCH-SpatialRelationInfo, or The first TPC field may be applied to beam related information associated with SRI-PUSCH-PowerControl determined based on the first SRI for the first PUSCH. In the case of FR1, the first TPC field may be applied to information associated with a parameter set in the power adjustment parameter. Here, the first TPC field may be the same as the rel-15/16 based TPC field.

값을 이용하여 전력의 증가 또는 감소의 정도를 지시하는 값) 필드가 제1 TPC 필드 내지 제2 TPC 필드를 포함하도록 상기 TPC command의 bit width를 3bit 또는 4bits(TPC command for scheduled PUCCH)로 구성할 수 있다.In addition, in the case of FR2, the second TPC field is applied to beam-related information associated with the SRI-PUSCH-PowerControl determined based on the second SRI for the second PUCCH-SpatialRelationInfo and the second PUSCH, and in the case of FR1, the second TPC field The field may be applied to information associated with a parameter set in the power adjustment parameter. Specifically, the base station is a TPC command in DCI format 1_0, 1_1, or 1_2 (

The bit width of the TPC command is 3 bits or 4 bits (TPC command for scheduled PUCCH) so that the field includes the first TPC field to the second TPC field. can

In this case, for example, the interpretation of the second TPC field and the configuration of the TPC command field may be as follows.

First, the corresponding field can be configured with a 4-bit width by adding an additional 2-bits bitwidth to the existing 2-bits bitwidth so that it can be interpreted in the same way as in the structure of rel-15 described above.

또는

만큼 증가/감소시키는 것으로 판단할 수 있다. As an example, the first (or last) 2 bits of the 4 bits may be indicated to be mapped to the beamforming direction of the PUCCH / PUSCH resource repeatedly transmitted for the first TRP. Specifically, when the assumption first (MSB) 2bits are 00 to 11, the UE sets the power transmitted to the PUCCH resource (set) transmitted (repeatedly) for the first TRP determined in the upper layer described above, corresponding to 00 to 11.

or

It can be judged as increasing/decreasing by

또는

만큼 증가/감소시키는 것으로 판단할 수 있다.In addition, the remaining 2 bits may be indicated to be mapped to the beamforming direction of the PUCCH resource (repeatedly) transmitted for the second TRP. Specifically, when the remaining (LSB) 2 bits are 00 to 11, the UE sets the power transmitted to the PUCCH / PUSCH resource (set) repeatedly transmitted for the second TRP determined in the above-described upper layer to 00 to 11.

or

It can be judged as increasing/decreasing by

As another example, the first (or last) 2 bits among the 4 bits may be indicated to be mapped to a PUCCH/PUSCH resource (set) of a first timing that is repeatedly transmitted. Specifically, the terminal is a PUCCH / PUSCH resource transmitted first if the 2 bits is 00, a PUCCH / PUSCH resource transmitted second if 01, and a PUCCH / PUSCH resource transmitted third if 10, if 11, It can be determined as indicating to correspond to the fourth transmitted PUCCH / PUSCH resource. If the number of times the PUCCH/PUSCH transmission is repeated is 8, the PUCCH/PUSCH resource may be sequentially interpreted by matching two sets to one bit information from the first transmission order. Thereafter, 2 bits may be equally applied as in the embodiment of method B-1.

As another example, in the first 2 bits of the 4 bits, 00 is all PUCCH / PUSCH resources included in the slot or subslot to which the first configured PUCCH resource is allocated, 01 is the PUCCH / PUSCH resource allocated immediately after the slot or subslot, 10 is the PUCCH / PUSCH resource allocated immediately after the slot or subslot indicated in 01, and 11 is the PUCCH / PUSCH resource allocated immediately after the slot or subslot indicated in 10. can Thereafter, 2 bits may be equally applied as in the embodiment of method B-1.

Second, the corresponding field may be composed of 3 bits by adding a bitwidth of 1 bit to indicate increase or decrease through relative comparison with the value of the first TPC field. In this case, the second TPC field may be determined depending on the value of the first TPC field.

For example, when the value of the added bit is 0, the base station and the terminal may understand that the second TPC value indicates a value reduced by X dB (eg, 1 dB) from the value indicated by the first TPC. When the value of the added bit is 1, it may be understood that the second TPC value indicates a value increased by X dB (eg, 1 dB) from the value indicated by the first TPC.

Third, by adding the value of the first TPC field and the independent bitwidth of 1 bit, the corresponding field can be composed of 3 bits.

For example, if the second TPC value is 0, the base station and the terminal can understand that the second TPC value indicates a value increased/decreased by a specific value (eg, 0 dB) determined by a standard or set in a higher layer. . As another example, if the second TPC value is 1, the base station and the terminal can understand that the second TPC value is determined by a standard or indicates a value increased/decreased by a specific value (eg: 1 dB) set in a higher layer. .

As another example, when the PUCCH / PUSCH transmission is repeated twice, if the first 1 bit of the 3 bits is 0, it is indicated to correspond to the first PUCCH / PUSCH resource, and if 1, it corresponds to the second configured PUCCH / PUSCH resource. It can be interpreted as indicating information.

As another example, when the PUCCH / PUSCH transmission is repeated four times, if the first 1 bit of the 3 bits is 0, it indicates to correspond to the first and second configured PUCCH / PUSCH resources, and if 1, the third and fourth configured PUCCH / It may be interpreted as information indicating to correspond to the PUSCH resource.

As another example, if the first bit of the 3 bits is 0, it indicates that the first set PUCCH resource corresponds to all PUCCH resources included in the allocated slot or subslot, and if 1, it corresponds to the PUCCH resource allocated after the slot or subslot. It can be interpreted as indicating information.

As another example, the first (or last) 1 bit added among the 3 bits may indicate whether to apply a different beam to a different slot. If the value of the added 1 bit is 0, the UE may determine that a different beam is not applied in another slot having a different TPC value. If the value of the added 1 bit is 1, the UE may determine that a different beam is not applied in another slot having a different TPC value.

In the various embodiments described above, the first 1 bit has been described as selecting the PUCCH/PUSCH resource or beamforming direction related information to which the TPC is applied, but it is not limited to this embodiment and the last bit may be used. In addition, although the various embodiments described above are mainly described with the added 1 bit, the remaining 2 bits can be applied similarly to the embodiment of Method B-1.

<Method B-4: Configure one TPC field indicating two TPC values and apply the TPC values indicated to the UE to a plurality of PUCCH/PUSCH transmissions, respectively>

값을 이용하여 전력의 증가 또는 감소의 정도를 지시하는 값) 정보를 포함하는 bit width가 2bits(TPC command for scheduled PUCCH) 또는 3bits로 할당될 수 있다. 이때, 2bits 내지 3bits의 TPC 필드 값은 상위레이어 또는 표준에서 결정한

의 조합으로 구성되는 TPC 매핑 테이블에 의해서 설정될 수 있다. In the DCI signaling method, a TPC value may be set through upper layer configuration so that one TPC field may indicate two TPC values. Specifically, the TPC command in DCI format 1_0, 1_1, or 1_2 (

A bit width including information (a value indicating the degree of increase or decrease in power using a value) information may be allocated as 2 bits (TPC command for scheduled PUCCH) or 3 bits. At this time, the TPC field value of 2 bits to 3 bits is determined by the higher layer or standard.

It can be set by a TPC mapping table composed of a combination of .

values들의 매핑 관계를 보여준다. 이때

가 2개의 값으로 구성되는데 첫 번째 값은 복수의 TRP 중에서 제1 TRP에 대응되는 값이고, 두 번째 값은 제2 TRP에 대응되는 값을 의미한다. 여기서 제1 TRP, 제2 TRP를 결정하는 과정은 앞서 설명한 PUCCH/PUSCH 자원 (세트), PUCCH-Spatialrelationinfo, SRI-PUSCH-PowerControl, SRS Resource Set 등을 따른다. As an example, below is the value of the TPC field in the DCI described above and Accumulated

Shows the mapping relationship between values. At this time

is composed of two values, the first value is a value corresponding to the first TRP among the plurality of TRPs, and the second value means a value corresponding to the second TRP. Here, the process of determining the first TRP and the second TRP follows the above-described PUCCH/PUSCH resource (set), PUCCH-Spatialrelationinfo, SRI-PUSCH-PowerControl, SRS Resource Set, and the like.

[Table 35]

values들의 또 다른 매핑 관계를 보여준다. 이때

가 2개의 값(예: -1, 1)이 구성되면, TPC 필드의 MSB가 지시하는 값은 복수의 TRP 중에서 제1 TRP에 대응되는 값이고, TPC 필드의 LSB가 지시하는 값은 제2 TRP에 대응되는 값을 의미한다. 여기서 제1 TRP, 제2 TRP를 결정하는 과정은 앞서 설명한 PUCCH/PUSCH 자원 (세트), PUCCH-Spatialrelationinfo, SRI-PUSCH-PowerControl, SRS Resource Set, DCI 내 SRI 필드 수 등을 따를 수 있다. As another example, below is the value of the TPC field in the DCI described above and Accumulated

Shows another mapping relationship between values. At this time

is composed of two values (eg, -1, 1), the value indicated by the MSB of the TPC field is a value corresponding to the first TRP among the plurality of TRPs, and the value indicated by the LSB of the TPC field is the second TRP value corresponding to . Here, the process of determining the first TRP and the second TRP may follow the above-described PUCCH/PUSCH resource (set), PUCCH-Spatialrelationinfo, SRI-PUSCH-PowerControl, SRS Resource Set, the number of SRI fields in DCI, and the like.

[Table 36]

값을 변경하기 위해 MAC CE 메시지 또는 RRC 시그널링을 기반으로 해당 관련 테이블의 업데이트를 수행할 수 있다.In addition, after the above mapping table is set, the base station sends the combination and

In order to change the value, the corresponding related table may be updated based on the MAC CE message or RRC signaling.

Meanwhile, the UE may perform a dynamic switching operation of receiving a PDCCH transmitted from one TRP while receiving a PDCCH transmitted from a plurality of TRPs in at least one slot. Conversely, the UE may perform a dynamic switching operation of receiving a PDCCH transmitted from a plurality of TRPs while receiving a PDCCH transmitted from one TRP in at least one slot or more according to UE capability.

In addition, the UE repeatedly transmits PUCCH/PUSCH resource (set) and transmission timing related information to repeatedly transmit PUCCH considering a plurality of TRPs in at least one slot. PUCCH/PUSCH to repeatedly transmit PUCCH/PUSCH considering one TRP while receiving information related to transmission timing A dynamic switching operation for receiving resource (set) and transmission timing related information may be performed.

The UE reversely transmits PUCCH/PUSCH resource (set) and transmission timing related information to repeatedly transmit PUCCH considering one TRP in at least one slot. PUCCH/PUSCH to repeatedly transmit PUCCH/PUSCH considering a plurality of TRPs A dynamic switching operation for receiving resource (set) related information may be performed.

The UE described above may consider PUCCH (repeated) transmission considering a plurality of TRPs according to UE capability, and transmit to check whether PUCCH (repeated) transmission considering a plurality of TRPs or PUCCH (repeated) transmission considering one TRP. The number of activated spatial relation info (eg, set 1 or 2) for the PUCCH resource, the number of power control parameter sets (eg, set 1 or 2), PRI bit-field (eg, 1 bit) above) information and at least one of the TPC field in DCI may be considered.

The UE described above may consider PUSCH (repeated) transmission considering a plurality of TRPs according to UE capability, and transmit to check whether it is PUSCH (repeated) transmission considering a plurality of TRPs or PUSCH (repeated) transmission considering one TRP. The number of activated (activated) p0-PUSCH-AlphaSetId, P0-PUSCH-Set for PUSCH resource (eg 1 or 2 settings, SRI bit-field (eg 2 field or more) information, usage is codebook or nonCodebook At least one of SRS-ResourceSet (eg, more than two sets) information, sri-PUSCH-MappingToAddModList (eg, more than two lists) information, and a TPC field in DCI may be considered.In addition, PUCCH allocated over at least one or more slots /PUSCH resource (set) may be configured in consideration of both intra-slot and inter-slot.

Below, the UE determines whether PUCCH (repeated) transmission considering a plurality of TRPs or PUCCH (repeated) transmission considering one TRP. The number or power of spatial relation info activated for the PUCCH resource indicated by the PRI field in DCI. After checking the number of control parameter sets, the operation of checking the TPC field in the DCI and the operation of interpreting the TPC field and adjusting the power according to the number of TRPs to be transmitted will be described in detail. Below, the UE determines whether it is PUSCH (repeated) transmission considering a plurality of TRPs or PUSCH (repeated) transmission considering a single TRP. After checking the number, the operation of checking the TPC field in the DCI and the operation of interpreting the TPC field and adjusting the power according to the number of TRPs to be transmitted will be described in detail.

When the UE performs PUCCH (repeated) transmission switching from a plurality of TRPs to one TRP, it is necessary to reinterpret information of the TPC field of the same size in DCI such as DCI format 1_0, 1_1, 1_2. During repeated PUCCH transmission, switching between a plurality of TRPs and one TRP may be determined by the number of PUCCH-SpatialRelationInfo associated with the transmitted PUCCH resource. If two PUCCH-SpatialRelationInfo are activated in one PUCCH resource, PUCCH is repeatedly transmitted in multiple TRPs, and if one PUCCH-SpatialRelationInfo is activated in one PUCCH resource, PUCCH can be repeatedly transmitted in one TRP.

In order for the UE to perform TPC during PUCCH (repeated) transmission in consideration of a plurality of TRPs, it is necessary to check the TPC fields in various DCIs of methods B-2 to B-4 described above. When the UE performs PUSCH (repeated) transmission switching from a plurality of TRPs to one TRP as in the above-described 5-5 or 5-6 embodiments, DCI formats 0_0, 0_1, 0_2, etc. in the same size in DCI It is necessary to reinterpret the information in the TPC field of In order for the UE to perform TPC during PUSCH (repeated) transmission considering a plurality of TRPs, it is necessary to check the TPC fields in various DCIs of methods B-2 to B-4 described above.

에 따라 전력을 조정할 수 있다.As an example, if switching is performed to PUCCH/PUSCH (repeated) transmission scheduling considering a single TRP during PUCCH/PUSCH (repeated) transmission scheduling considering a plurality of TRPs as in method B-2, the terminal rel as in method B-1 The TPC field used in -15/16 can be interpreted in the same way. That is, corresponding to information 00 to 11 received in the TPC field of 2 bits

Power can be adjusted accordingly.

As another example, when switching is performed to PUCCH/PUSCH (repeated) transmission scheduling considering one TPC during PUCCH/PUSCH (repeated) transmission scheduling considering a plurality of TRPs as in method B-3, two TPC fields composed of 4 bits It may be assumed that the first 2 bits field (MBS field) is applied for a single TRP, and the remaining 2 bits field is ignored. In this case, the remaining fields may be indicated as 00 depending on implementation. Alternatively, the UE may apply the TPC based on the value indicated by the actually set TRP among the plurality of TRPs according to the higher layer signaling described above. The TPC command field indicated for TRP other than the actually configured TRP may be ignored.

에 따라 전력을 조정할 수 있다. 한편, TPC 필드 사이즈가 3bits로 구성된 경우, 단말은 3 bits 중에서 처음 1 bit (MSB) 또는 마지막 1bit (LSB)를 무시할 수 있다. 또는 상위 레이어에서 새로 설정한 3 bits에 맞도록 새로운 TPC 테이블을 설정하여 동작할 수 있다. 또는 상위 레이어에서 TPC command 관련/연계 신규 파라미터에 기반하여 TRP를 구분하고, 전력 조정 동작을 수행할 수 있다.As another example, if switching is performed to PUCCH/PUSCH (repeat) transmission scheduling considering one TPC during PUCCH (repeated) transmission scheduling considering a plurality of TRPs as in method B-4, if the TPC field size is configured with 2 bits, the terminal As in method B-1, the TPC field used in rel-15/16 can be interpreted in the same way. That is, corresponding to information 00 to 11 received in the TPC field of 2 bits

Power can be adjusted accordingly. On the other hand, when the TPC field size consists of 3 bits, the UE may ignore the first 1 bit (MSB) or the last 1 bit (LSB) among 3 bits. Alternatively, the operation may be performed by setting a new TPC table to fit the 3 bits newly set in the upper layer. Alternatively, the upper layer may classify the TRP based on the new TPC command related/associated parameter and perform a power adjustment operation.

<Seventh embodiment: Open-loop power control method considering multiple TRP>

Hereinafter, as shown in FIG. 21 , a method for controlling open-loop power during repeated PUSCH transmission for a plurality of TRPs is proposed.

First, FIG. 21 (PUSCH repeatedly transmitted in different directions for each slot) 21-00 is a case of single-PDCCH-based NC-JT, and shows an example of scheduling the UE to repeatedly transmit PUSCH in a plurality of beamforming directions.

In 21-00, the PUSCH resource (PUSCH #1 or #1') is transmitted based on the same TB or the same HARQ process ID for each slot in a plurality of slot intervals.

In 21-20, the PUSCH resource (PUSCH #1 or #1') is transmitted based on the same TB, the same HARQ process ID, and the same beamforming direction in a plurality of slot sections.

In 21-40, the PUSCH resource (PUSCH #1 or #1') shows an operation in which a plurality of repeated PUSCH transmissions and a single PUSCH transmission are switched in at least one slot.

The open-loop power control operation of the UE in NR release 16 may be used to support different target received SINRs by setting different p0 values according to whether the PUSCH to be transmitted by the UE is eMBB traffic or URLLC traffic. That is, if the PUSCH to be transmitted by the UE is eMBB traffic, the p0 value may be determined through the upper layer parameter SRI-PUSCH-PowerControl and the SRI indicated by DCI. If the PUSCH to be transmitted by the UE is URLLC traffic, the upper layer parameter PUSCH-PowerControl-v1610 is set The p0 value may be determined through the P0-PUSCH-Set and the open-loop power control (OLPC) parameter set indication field within the DCI and the SRI field within the DCI (if the SRI field exists within DCI 0_1 or 0_2).

For the open-loop power control operation, the base station may additionally transmit power control related information to the terminal through the upper layer configuration as shown in Table 37. Here, according to the upper layer configuration or DCI field related information linked to the upper layer, it is largely divided into two cases as follows, and solutions are proposed in each case.

)의 값을 계산할 수 있다. 여기에 추가로 단말이 수신한 DCI(또는 DCI format)가 1 bit의 오픈루프 전력 제어 파라미터 세트 지시자(OLPC (Open-loop power control) parameter set indication) 필드를 포함하고, 이때 오픈루프 전력 제어 파라미터 세트 지시자 필드에서 지시된 값이 1이면 단말은 SRI 필드 값과 동일한 p0-PUSCH-SetId를 가지는 P0-PUSCH-Set 내 설정된 p0-List의 가장 첫번째 값 p0를 이용하여

의 값을 계산할 수 있다. 오픈루프 전력 제어 파라미터 세트 지시자 필드에서 지시된 값이 0이면 단말은 SRI 필드 값에 매핑된 p0-PUSCH-AlphaSet에서 설정된 p0를 이용하여

의 값을 계산할 수 있다.First, the base station provides one or more p0-PUSCH-AlphaSetId through SRI-PUSCH-PowerControl in the upper layer to the terminal, and the base station schedules the PUSCH repeatedly transmitted in DCI (format) for scheduling the PUSCH to the terminal. When the SRI field is included in the SRI field, the UE sets a set of values (eg, 0 to 7) for the existing SRI field from the sri-PUSCH-PowerControlId configured in the SRI-PUSCH-PowerControl and the p0-PUSCH configured in the P0-PUSCH-AlphaSetd. -You can check the mapping relationship of AlphaSetId. That is, the UE checks the p0 and alpha values used to determine the open-loop power control-related transmit power from the p0-PUSCH-AlphaSetId value mapped to the value of the SRI field received in DCI, and based on the value, the transmit power (

) can be calculated. In addition, the DCI (or DCI format) received by the terminal includes a 1-bit open-loop power control (OLPC) parameter set indication field, in which case the open-loop power control parameter set If the value indicated in the indicator field is 1, the UE uses the first value p0 of the p0-List set in the P0-PUSCH-Set having the same p0-PUSCH-SetId as the SRI field value.

value can be calculated. If the value indicated in the open-loop power control parameter set indicator field is 0, the UE uses p0 set in the p0-PUSCH-AlphaSet mapped to the SRI field value.

value can be calculated.

Second, the base station does not set SRI-PUSCH-PowerControl related information in a higher layer to the UE, or when scheduling PUSCH that is repeatedly transmitted instead of retransmission for RAR uplink grant in DCI (format) for scheduling PUSCH, the DCI If the SRI field is not included, it can be set to j=2, and if P0-PUSCH-Set is additionally set in the terminal, the terminal is configured in Pusch-PowerControl-r16 in olpc-ParameterSetForDCI-Format0-1-r16 (or olpc -ParameterSetForDCI-Format0-2-r16) is set to 1 or 2, and it can be determined that the open-loop power control parameter set indicator in DCI is included. At this time, when j=2 to J-1 is set as described above, when PUSCH scheduling is performed through a dynamic grant (when scheduling is performed through DCI), a scheduled PUSCH based on the transmission power parameter for the dynamic grant PUSCH It means that the transmission power of can be determined, and when j=2, it may mean that the first transmission power parameter entry among the transmission power parameters for the dynamic grant PUSCH is associated with the scheduled PUSCH. That is, p0 and alpha can be determined by referring to the first P0-PUSCH-AlphaSet corresponding to the first entry in the upper layer configuration p0-AlpharSets (if P0-PUSCH-Set is not set).

If the value of olpc-ParameterSetForDCI-Format0-1-r16 is set to 1, the UE means that 1 bit is included in the open-loop power control parameter set indicator in DCI, and when the value of olpc-ParameterSetForDCI-Format0-1-r16 is set to 2 It may be determined that 2 bits are included in the open-loop power control parameter set indicator in DCI.

의 값을 계산할 수 있다. 오픈루프 전력 제어 파라미터 세트 지시자 필드에서 지시된 값이 0이면, 단말은 상위 레이어 PUSCH-PowerControl 내에 p0-AlphaSets 설정 시, 첫 번째 P0-PUSCH-AlphaSet으로 설정되는 p0를 이용하여

의 값을 계산할 수 있다.When the value of the open-loop power control parameter set indicator field (eg, 1 bit) in the DCI is indicated as 1, the UE has the lowest (lowest) p0-PUSCH-SetID set in the upper layer p0-PUSCH-SetList P0-PUSCH - Using the first p0-PUSCH value among p0-List of Set

value can be calculated. If the value indicated in the open-loop power control parameter set indicator field is 0, the UE uses p0 set as the first P0-PUSCH-AlphaSet when setting p0-AlphaSets in the upper layer PUSCH-PowerControl.

value can be calculated.

의 값을 계산할 수 있다. 상기 DCI 내 오픈루프 전력 제어 파라미터 세트 지시자 필드(예: 2 bits) 값이 10로 지시되면, 단말은 상위 레이어 p0-PUSCH-SetList 내 설정된 가장 작은 (lowest) p0-PUSCH-SetID를 가지는 P0-PUSCH-Set의 p0-List 중 두 번째 p0-PUSCH 값을 이용하여

의 값을 계산할 수 있다. 상기 DCI 내 오픈루프 전력 제어 파라미터 세트 지시자 필드(예: 2 bits) 값이 00로 지시되면, 단말은 상위 레이어 PUSCH-PowerControl 내에 p0-AlphaSets 설정 시, 첫 번째 P0-PUSCH-AlphaSet으로 설정되는 p0를 이용하여

의 값을 계산할 수 있다.When the value of the open-loop power control parameter set indicator field (eg, 2 bits) in the DCI is indicated as 01, the UE has the lowest (lowest) p0-PUSCH-SetID set in the upper layer p0-PUSCH-SetList P0-PUSCH - Using the first p0-PUSCH value among p0-List of Set

value can be calculated. When the value of the open-loop power control parameter set indicator field (eg, 2 bits) in the DCI is indicated as 10, the UE has the lowest (lowest) p0-PUSCH-SetID set in the upper layer p0-PUSCH-SetList P0-PUSCH - Using the second p0-PUSCH value among p0-List of Set

value can be calculated. When the value of the open-loop power control parameter set indicator field (eg, 2 bits) in the DCI is indicated as 00, the UE sets p0-AlphaSets in the upper layer PUSCH-PowerControl, p0 set as the first P0-PUSCH-AlphaSet using

value can be calculated.

의 값을 계산할 수 있다.On the other hand, when the base station does not set SRI-PUSCH-PowerControl related information in the upper layer to the terminal, or when scheduling PUSCH repeatedly transmitted in DCI (format) for scheduling PUSCH, the SRI field does not exist and the P0-PUSCH-Set is If not set, using the p0 value of the first P0-PUSCH-AlphaSet in p0-AlpahSets

value can be calculated.

[Table 37]

In the above two cases, the UE needs an open-loop power control method when repeatedly transmitting PUSCH for a plurality of TRPs. Methods C-1 to C-5 may be extended and applied similarly to the above-described TPC-based power control methods B-1 to B-4.

The base station and the terminal can support open-loop power control when repeatedly transmitting PUSCH for a plurality of TRPs based on RRC configuration or MAC CE message as follows.

For example, in order to support an open-loop power control method in a PUSCH repeated transmission operation based on a plurality of TRPs, the base station may set an RRC parameter for TRP 2 . To this end, the base station doubles the value of maxNrofSRI-PUSCH-Mapping in p0-PUSCH-SetList-r16, or p0-PUSCH-SetList1-r16, p0-PUSCH-SetList2-r16 instead of p0-PUSCH-SetList-r16. Open-loop power control information for TRP 2 can be set by adding one set as shown in FIG.

As another example, in order to support an open-loop power control method in a repeated PUSCH transmission operation based on a plurality of TRPs, the base station may set an RRC parameter for TRP 2 . To this end, the base station doubles the value of maxNrofSRI-PUSCH-Set in p0-PUSCH-Set, or adds one set such as p0-List1-r16, p0-List2-r16 instead of p0-List-r16. In this way, open-loop power control information for TRP 2 can be set.

As another example, in order to support the open-loop power control method in a PUSCH repeated transmission operation based on a plurality of TRPs, the base station may add an existing or new RRC parameter for TRP2 to the terminal and transmit a MAC CE message based thereon. Specifically, the MAC CE message transmitted by the base station is p0-PUSCH-SetList-r16 or {p0-PUSCH-SetList1-r16, p0-PUSCH-SetList2-r16} p0 or alpha value for operating open loop power control to a specific terminal. information related to the

The base station and the terminal can support open-loop power control when repeatedly transmitting PUSCH for a plurality of TRPs based on higher layer configuration and DCI field change or reinterpretation as follows. In the following embodiment, when two or more SRI fields are indicated by DCI in order to transmit a PUSCH with a plurality of TRPs, the UE does not expect a case where the bitwidth of each SRI field is 0 bit. Alternatively, if the bitwidth of the SRI field is set to 0 bit, including the case where the number of SRS resources in the SRS resource set is 1, the UE expects that the bitwidth of all two SRI fields is set to 0 bit.

<Method C-1: How to add an additional open-loop power control parameter set indicator field>

When the open-loop power control parameter set indicator field is set to 1 bit or 2 bits by default among the two cases described above, the open-loop power control parameter set indicator in consideration of the open-loop power control operation for repeated PUSCH transmission for a plurality of TRPs The field may be set to 2 bits or 4 bits for a plurality of TRPs. Alternatively, an open-loop power control parameter set indicator field may be added, and a plurality of SRI fields for repeated PUSCH transmission for a plurality of TRPs may be respectively associated with the open-loop power control parameter set indicator field.

의 값을 계산할 수 있으며, LSB 1 bit가 1로 설정되었다면 단말은 p0-PUSCH-SetList2-r16 내 두 번째 SRI 필드 값과 동일한 p0-PUSCH-SetId로 설정된 P0-PUSCH-Set의 p0-List 중 가장 첫 번째 p0-PUSCH의 p0 값을 이용하거나 또는 두 번째 SRI 필드 값과 동일한 p0-PUSCH-SetId로 설정된 p0-PUSCH-SetList 내 P0-PUSCH-Set의 p0-List2-r16 중 가장 첫 번째 p0-PUSCH의 p0 값을 이용하여 제 2 TRP 또는 제2 타이밍 시점에 대한

의 값을 계산할 수 있다. 만약 MSB 1 bit 또는 LSB 1 bit가 0으로 설정되었다면 각 SRI 필드에 대응되는 P0-PUSCH-AlphaSet을 참조한 p0 값을 이용하여 각 TRP 또는 각 타이밍 시점에 대한

의 값을 계산할 수 있다. 상기 각 SRI 필드에 대응되는 P0-PUSCH-AlphaSet을 참조한 p0 값은 구체적으로 P0_PUSCH-AlphaSet1 또는 P0_PUSCH-AlphaSet2의 p0값을 의미할 수 있다. 또는 상기 각 SRI 필드에 대응되는 P0-PUSCH-AlphaSet을 참조한 p0 값은 구체적으로 P0_PUSCH-AlphaSet에서 제1 TRP를 위한 p0-1, 제2 TRP를 위한 p0-2값을 의미할 수 있다. First, if all of the two open-loop power control parameter set indicator fields are 2 bits, the first bit (MSB) of the UE is the value indicated for the first TRP or the first timing point, and the remaining bits (LSB) are the second TRP Alternatively, it may be determined as a value indicated for the second timing point. That is, if the MSB 1 bit is set to 1, according to the above-described improved p0-PUSCH-SetList setting method or the improved p0-List setting method, the UE is p0-PUSCH equal to the first SRI field value in p0-PUSCH-SetList1-r16. -P0-PUSCH in p0-PUSCH-SetList set by using the p0 value of the first p0-PUSCH among the p0-List of P0-PUSCH-Set set with SetId or with the same p0-PUSCH-SetId as the first SRI field value - Using the p0 value of the first p0-PUSCH among p0-List1-r16 of the set, the first TRP or the first timing point

can be calculated, and if the LSB 1 bit is set to 1, the UE is the most in the p0-List of the P0-PUSCH-Set set to the same p0-PUSCH-SetId as the second SRI field value in p0-PUSCH-SetList2-r16. The first p0-PUSCH among p0-List2-r16 of the P0-PUSCH-Set in the p0-PUSCH-SetList using the p0 value of the first p0-PUSCH or set to the same p0-PUSCH-SetId as the second SRI field value For the second TRP or the second timing point using the p0 value of

value can be calculated. If MSB 1 bit or LSB 1 bit is set to 0, each TRP or each timing

value can be calculated. The p0 value referring to the P0-PUSCH-AlphaSet corresponding to each SRI field may specifically mean a p0 value of P0_PUSCH-AlphaSet1 or P0_PUSCH-AlphaSet2. Alternatively, the p0 value referring to the P0-PUSCH-AlphaSet corresponding to each SRI field may specifically mean a p0-1 value for the first TRP and a p0-2 value for the second TRP in the P0_PUSCH-AlphaSet.

Second, if the base station does not set SRI-PUSCH-PowerControl related information in an upper layer to the UE, or when scheduling PUSCH repeatedly transmitted in DCI (format) for scheduling PUSCH, if the SRI field does not exist, two open If the entire loop power control parameter set indicator field is 2 bits, the terminal indicates that the first bit (MSB) is a value indicated for the first TRP or the first timing time, and the remaining bits (LSB) are the second TRP or the second timing time. It can be judged by the indicated value for

For example, if the open-loop power control parameter set indicator field is 2 bits, the first bit (MSB) of the terminal is a value indicated for the first TRP or the first timing point, and the remaining bits (LSB) are the second TRP or the second It may be determined as a value indicated for the timing point.

의 값을 계산하고, 가장 작은 것 보다 하나 큰 값(lowest+1)인 p0-PUSCH-SetID의 p0-List 세트(예: {p0-PUSCH, p0-PUSCH}) 에서 첫 번째 p0-PUSCH 값을 이용하여 제2 TRP 또는 제2 타이밍 시점을 위한

의 값을 계산할 수 있다. That is, if both MSB 1 bit and LSB 1 bit are set to 1, the UE is the first of the p0-List of P0-PUSCH-Set having the lowest p0-PUSCH-SetID set in the upper layer p0-PUSCH-SetList. For the first TRP or the first timing point using the p0-PUSCH value

Calculate the value of , and find the first p0-PUSCH value from the p0-List set (eg {p0-PUSCH, p0-PUSCH}) of p0-PUSCH-SetID that is one greater (lowest+1) than the smallest. for the second TRP or the second timing point using

value can be calculated.

의 값을 계산할 수 있다. LSB 1 bit가 1로 설정되었다면, 상술한 향상된 p0-PUSCH-SetList 설정 방법 또는 향상된 p0-List 설정 방법에 따라 단말은 p0-PUSCH-SetList2-r16 내 가장 작은(lowest) p0-PUSCH-SetId로 설정된 P0-PUSCH-Set의 p0-List 중 가장 첫 번째 p0-PUSCH의 p0 값을 이용하거나 또는 가장 작은(lowest) p0-PUSCH-SetId로 설정된 p0-PUSCH-SetList 내 P0-PUSCH-Set의 p0-List2-r16 중 가장 첫 번째 p0-PUSCH의 p0 값을 이용하여 제2 TRP 또는 제2 타이밍 시점을 위한

의 값을 계산할 수 있다. 만약 MSB 1 bit 또는 LSB 1 bit가 0으로 설정되었다면 각 TRP에 대응되는 P0-PUSCH-AlphaSet1 또는 P0-PUSCH-AlphaSet2를 참조한 p0 값을 이용하거나 P0-PUSCH-AlphaSet 내 각 TRP에 대응되는 p0-1 또는 p0-2 값을 이용하여 각 TRP 또는 각 타이밍 시점에 대한

의 값을 계산할 수 있다. 또는 만약 MSB 1 bit 또는 LSB 1 bit가 0으로 설정되었다면 p0-AlphaSets 내 첫 번째 P0-PUSCH-AlphaSet을 참조한 p0 값을 이용하여 제1 TRP 또는 제1 타이밍 시점을 위한

의 값을 계산하거나 p0-AlphaSets 내 두 번째 P0-PUSCH-AlphaSet을 참조한 p0 값을 제2 TRP 또는 제2 타이밍 시점을 위한

의 값을 이용하여 계산할 수 있다.Alternatively, if the MSB 1 bit is set to 1, according to the improved p0-PUSCH-SetList setting method or the improved p0-List setting method, the UE uses the lowest p0-PUSCH-SetId in p0-PUSCH-SetList1-r16. Use the p0 value of the first p0-PUSCH among the p0-List of the configured P0-PUSCH-Set or p0- of the P0-PUSCH-Set in the p0-PUSCH-SetList set as the lowest p0-PUSCH-SetId For the first TRP or the first timing point using the p0 value of the first p0-PUSCH of List1-r16

value can be calculated. If the LSB 1 bit is set to 1, according to the improved p0-PUSCH-SetList setting method or the improved p0-List setting method, the terminal is set to the lowest p0-PUSCH-SetId in p0-PUSCH-SetList2-r16. p0-List2 of P0-PUSCH-Set in p0-PUSCH-SetList using the p0 value of the first p0-PUSCH among p0-List of P0-PUSCH-Set or set to the lowest p0-PUSCH-SetId -r16 using the p0 value of the first p0-PUSCH for the second TRP or the second timing point

value can be calculated. If MSB 1 bit or LSB 1 bit is set to 0, use p0 value referring to P0-PUSCH-AlphaSet1 or P0-PUSCH-AlphaSet2 corresponding to each TRP or p0-1 corresponding to each TRP in P0-PUSCH-AlphaSet or for each TRP or each timing point using the p0-2 value.

value can be calculated. Or, if the MSB 1 bit or the LSB 1 bit is set to 0, the first TRP or the first timing point using the p0 value referring to the first P0-PUSCH-AlphaSet in the p0-AlphaSets.

Calculate the value of or use the p0 value referring to the second P0-PUSCH-AlphaSet in the p0-AlphaSets for the second TRP or the second timing point.

It can be calculated using the value of

As another example, if the open-loop power control parameter set indicator field is 4 bits, the first 2 bits (MSB) of the UE are the values indicated for the first TRP or the first timing point, and the remaining bits (LSB) are the second TRP or the second TRP. It can be determined as a value indicated for the timing point.

의 값을 계산할 수 있다. That is, when the value of the first bit field (MSB) (eg, 2 bits) of the open-loop power control parameter set indicator field in the DCI is indicated as 01, the UE sets the lowest p0 in the upper layer p0-PUSCH-SetList. - For the first TRP or the first timing point using the first p0-PUSCH value among the p0-List of the P0-PUSCH-Set having the PUSCH-SetID

value can be calculated.

의 값을 계산할 수 있다. When the value of the first bit field (MSB) (eg, 2 bits) of the open-loop power control parameter set indicator field in the DCI is indicated as 10, the terminal sets the lowest p0-PUSCH set in the upper layer p0-PUSCH-SetList. - For the first TRP or the first timing point using the second p0-PUSCH value among the p0-List of the P0-PUSCH-Set having the -SetID

value can be calculated.

의 값을 계산할 수 있다. When the value of the first bit field (MSB) (eg, 2 bits) of the open-loop power control parameter set indicator field in the DCI is indicated as 00, the UE configures p0-AlphaSets in the upper layer PUSCH-PowerControl, at least two or more P0s -PUSCH-AlphaSet (eg, PUSCH-AlphaSet1 and P0-PUSCH-AlphaSet2) of the first P0-PUSCH-AlphaSet (eg, PUSCH-AlphaSet1) using p0 set for the first TRP or the first timing point

value can be calculated.

의 값을 계산할 수 있다. Or, when the value of the first bit field (MSB) (eg, 2 bits) of the open-loop power control parameter set indicator field in the DCI is indicated as 00, the UE sets p0-AlphaSets in the upper layer PUSCH-PowerControl, the first P0- For the first TRP or the first timing point using the first p0 value (eg, p0-1) among at least two p0 values (eg, p0-1 or p0-2) set in the PUSCH-AlphaSet

value can be calculated.

의 값을 계산할 수 있다.Or, when the value of the first bit field (MSB) (eg, 2 bits) of the open-loop power control parameter set indicator field in the DCI is indicated as 00, the UE sets p0-AlphaSets in the upper layer PUSCH-PowerControl, the first P0- For the first TRP or the first timing point using p0 set in the PUSCH-AlphaSet

value can be calculated.

의 값을 계산할 수 있다. In addition, when the value of the remaining bit field (LSB) (eg, 2 bits) of the open-loop power control parameter set indicator field in the DCI is indicated as 01, the UE is one larger than the smallest set in the upper layer p0-PUSCH-SetList. For the second TRP or the second timing point by using the first p0-PUSCH value in the p0-List set (eg, {p0-PUSCH, p0-PUSCH}) of the value (lowest+1) p0-PUSCH-Set

value can be calculated.

의 값을 계산할 수 있다. When the remaining bit field (LSB) (eg, 2 bits) value of the open-loop power control parameter set indicator field in the DCI is indicated as 10, the terminal is set to a value one larger than the smallest set in the upper layer p0-PUSCH-SetList ( lowest+1) using the second p0-PUSCH value of the p0-List of the P0-PUSCH-Set having the p0-PUSCH-SetID for the second TRP or the second timing point

value can be calculated.

의 값을 계산할 수 있다. When the remaining bit field (LSB) (eg, 2 bits) value of the open-loop power control parameter set indicator field in the DCI is indicated as 00, the UE configures p0-AlphaSets in the upper layer PUSCH-PowerControl, at least two or more P0 -PUSCH-AlphaSet (eg, PUSCH-AlphaSet1 and P0-PUSCH-AlphaSet2) using the second P0-PUSCH-AlphaSet (eg PUSCH-AlphaSet2) set p0 for the second TRP or the second timing point

value can be calculated.

의 값을 계산할 수 있다. Or, when the remaining bit field (LSB) (eg, 2 bits) value of the open-loop power control parameter set indicator field in the DCI is indicated as 00, the UE sets p0-AlphaSets in the upper layer PUSCH-PowerControl, one P0- For the second TRP or the second timing point using the second p0 value (eg p0-2) among at least two p0 values (eg, p0-1 or p0-2) set in the PUSCH-AlphaSet

value can be calculated.

의 값을 계산할 수 있다.Or, when the remaining bit field (LSB) (eg, 2 bits) value of the open-loop power control parameter set indicator field in the DCI is indicated as 00, the UE sets p0-AlphaSets in the upper layer PUSCH-PowerControl, the second P0- For the second TRP or the second timing point using p0 set in the PUSCH-AlphaSet

value can be calculated.

의 값을 계산할 수 있다. As another example, if the first 2 bits (MSB) is indicated as 01, according to the above-described improved p0-PUSCH-SetList setting method or the improved p0-List setting method, the terminal is p0-PUSCH-SetList1-r16 in the smallest (lowest) p0- Use the p0 value of the first p0-PUSCH among the p0-List of the P0-PUSCH-Set set with PUSCH-SetId or P0-PUSCH- in the p0-PUSCH-SetList set with the lowest p0-PUSCH-SetId For the first TRP or the first timing point using the p0 value of the first p0-PUSCH among p0-List1-r16 of the set

value can be calculated.

의 값을 계산할 수 있다. Or, if the first 2 bits (MSB) is indicated as 10, the UE according to the above-described improved p0-PUSCH-SetList setting method or the improved p0-List setting method is the lowest p0-PUSCH in p0-PUSCH-SetList1-r16. -Use the p0 value of the second p0-PUSCH among the p0-List of the P0-PUSCH-Set set with SetId or the P0-PUSCH-Set in the p0-PUSCH-SetList set with the lowest p0-PUSCH-SetId. For the first TRP or the first timing point using the p0 value of the second p0-PUSCH of p0-List1-r16

value can be calculated.

의 값을 계산할 수 있다. In addition, if the remaining 2 bits (LSB) is indicated as 01, according to the above-described improved p0-PUSCH-SetList setting method or the improved p0-List setting method, the terminal is the lowest p0-PUSCH in p0-PUSCH-SetList2-r16. -Use the p0 value of the first p0-PUSCH among the p0-Lists of the P0-PUSCH-Set set with SetId or P0-PUSCH-Set in the p0-PUSCH-SetList set with the lowest p0-PUSCH-SetId For the second TRP or the second timing point using the p0 value of the first p0-PUSCH among p0-List2-r16 of

value can be calculated.

의 값을 계산할 수 있다. In addition, if the first 2 bits (MSB) is indicated as 10, the UE according to the above-described improved p0-PUSCH-SetList setting method or the improved p0-List setting method is the lowest p0-PUSCH in p0-PUSCH-SetList2-r16. -Use the p0 value of the second p0-PUSCH among the p0-List of the P0-PUSCH-Set set with SetId or the P0-PUSCH-Set in the p0-PUSCH-SetList set with the lowest p0-PUSCH-SetId. For the second TRP or the second timing point using the p0 value of the second p0-PUSCH of p0-List2-r16

value can be calculated.

의 값을 계산할 수 있다. If MSB 2 bits or LSB 2 bits are set to 00, the terminal uses a p0 value referring to P0-PUSCH-AlphaSet1 or P0-PUSCH-AlphaSet2 corresponding to each TRP or P0-PUSCH-AlphaSet corresponding to each TRP. Use the p0-1 or p0-2 values for each TRP or each timing point.

value can be calculated.

의 값을 계산하거나 두 번째 P0-PUSCH-AlphaSet 내 설정되는 p0를 이용하여 제2 TRP 또는 제2 타이밍 시점을 위한

의 값을 계산할 수 있다.Alternatively, if MSB 2 bits or LSB 2 bits are set to 00, when p0-AlphaSets are set in the upper layer PUSCH-PowerControl, the UE determines the first TRP or the first timing point using p0 set in the first P0-PUSCH-AlphaSet. for

Calculate the value of or use p0 set in the second P0-PUSCH-AlphaSet for the second TRP or the second timing point

value can be calculated.

<Method C-2: How to apply the same open-loop power control parameter set indicator field for multiple TRPs>

)의 값을 계산할 수 있다. 여기에 추가로 단말이 수신한 DCI(또는 DCI format)가 1 bit의 오픈루프 전력 제어 파라미터 세트 지시자(OLPC (Open-loop power control) parameter set indication) 필드를 포함하고, 이때 오픈루프 전력 제어 파라미터 세트 지시자 필드에서 지시된 값이 1이면 단말은 각 SRI 필드 값과 동일한 p0-PUSCH-SetId로 설정된 P0-PUSCH-Set의 가장 첫번째 값 p0를 이용하여 제1 TRP 및 제2 TRP 또는 제1 타이밍 시점 및 제2 타이밍 시점을 위하여 동일한

의 값을 계산할 수 있다. 오픈루프 전력 제어 파라미터 세트 지시자 필드에서 지시된 값이 0이면 단말은 SRI 필드 값에 매핑된 p0-PUSCH-AlphaSet에서 설정된 p0를 이용하여

의 값을 계산할 수 있다.First, the base station provides one or more p0-PUSCH-AlphaSetId through SRI-PUSCH-PowerControl in the upper layer to the terminal, and the base station schedules the PUSCH repeatedly transmitted in DCI (format) for scheduling the PUSCH to the terminal. When the SRI field is included in the SRI field, the UE sets a set of values (eg, 0 to 7) for the existing SRI field from the sri-PUSCH-PowerControlId configured in the SRI-PUSCH-PowerControl and the p0-PUSCH configured in the P0-PUSCH-AlphaSetd. -You can check the mapping relationship of AlphaSetId. That is, the terminal checks the p0 and alpha values used to determine the open-loop power control-related transmit power from the p0-PUSCH-AlphaSetId value mapped to the value of each SRI field received from DCI, and based on the value, the transmit power (

) can be calculated. In addition, the DCI (or DCI format) received by the terminal includes a 1-bit open-loop power control (OLPC) parameter set indication field, in which case the open-loop power control parameter set If the value indicated in the indicator field is 1, the UE uses the first value p0 of the P0-PUSCH-Set set to the same p0-PUSCH-SetId as the value of each SRI field, the first TRP and the second TRP or the first timing time and same for the second timing point

value can be calculated. If the value indicated in the open-loop power control parameter set indicator field is 0, the UE uses p0 set in the p0-PUSCH-AlphaSet mapped to the SRI field value.

value can be calculated.

Second, when the base station does not set SRI-PUSCH-PowerControl related information in a higher layer to the terminal, or when scheduling a PUSCH repeatedly transmitted in DCI (format) for scheduling PUSCH, the DCI does not include the SRI field, the terminal It can be determined that the value of olpc-ParameterSetForDCI-Format0-1-r16 (or olpc-ParameterSetForDCI-Format0-2-r16) is set in Pusch-PowerControl-r16 and the open-loop power control parameter set indicator in DCI is included. have. If the value of olpc-ParameterSetForDCI-Format0-1-r16 is set to 1, the UE means that 1 bit is included in the open-loop power control parameter set indicator in DCI, and when the value of olpc-ParameterSetForDCI-Format0-1-r16 is set to 2 It may be determined that 2 bits are included in the open-loop power control parameter set indicator in DCI.

의 값을 계산할 수 있다. 오픈루프 전력 제어 파라미터 세트 지시자 필드에서 지시된 값이 0이면, 단말은 상위 레이어 PUSCH-PowerControl 내에 p0-AlphaSets 설정 시, 첫 번째 P0-PUSCH-AlphaSet으로 설정되는 p0를 이용하여

의 값을 계산할 수 있다.When the value of the open-loop power control parameter set indicator field (eg, 1 bit) in the DCI is indicated as 1, the UE has the lowest (lowest) p0-PUSCH-SetID set in the upper layer p0-PUSCH-SetList P0-PUSCH -The same for the first TRP and the second TRP or the first timing point and the second timing point using the first p0-PUSCH value of the p0-List of the set

value can be calculated. If the value indicated in the open-loop power control parameter set indicator field is 0, the UE uses p0 set as the first P0-PUSCH-AlphaSet when setting p0-AlphaSets in the upper layer PUSCH-PowerControl.

value can be calculated.

의 값을 계산할 수 있다. When the value of the open-loop power control parameter set indicator field (eg, 2 bits) in the DCI is indicated as 01, the UE has the lowest (lowest) p0-PUSCH-SetID set in the upper layer p0-PUSCH-SetList P0-PUSCH -The same for the first TRP and the second TRP or the first timing point and the second timing point using the first p0-PUSCH value of the p0-List of the set

value can be calculated.

의 값을 계산할 수 있다. When the value of the open-loop power control parameter set indicator field (eg, 2 bits) in the DCI is indicated as 10, the UE has the lowest (lowest) p0-PUSCH-SetID set in the upper layer p0-PUSCH-SetList P0-PUSCH - Using the second p0-PUSCH value among p0-List of Set

value can be calculated.

의 값을 계산할 수 있다.When the value of the open-loop power control parameter set indicator field (eg, 2 bits) in the DCI is indicated as 00, the UE sets p0-AlphaSets in the upper layer PUSCH-PowerControl, p0 set as the first P0-PUSCH-AlphaSet using

value can be calculated.

<Method C-3: How to set a new mapping table in the upper layer>

의 값을 계산할 수 있다. First, the base station provides one or more p0-PUSCH-AlphaSetId through SRI-PUSCH-PowerControl in the upper layer to the terminal, and the base station schedules the PUSCH repeatedly transmitted in DCI (format) for scheduling the PUSCH to the terminal. When the SRI field is included in the SRI field, the UE sets a set of values (eg, 0 to 7) for the existing SRI field from the sri-PUSCH-PowerControlId configured in the SRI-PUSCH-PowerControl and the p0-PUSCH configured in the P0-PUSCH-AlphaSetd. -You can check the mapping relationship of AlphaSetId. That is, the UE is based on the p0 and alpha values used to determine the open-loop power control-related transmit power from the p0-PUSCH-AlphaSetId value mapped to the value of each SRI field received from DCI.

value can be calculated.

의 값을 계산할 수 있다. 만일 상기 필드에서 지시된 값이 0이면 단말은 아래 표 36과 같이 {제1 TRP, 제2 TRP} 또는 {제1 타이밍 시점, 제2 타이밍 시점}의 오픈루프 파라미터 세트 지시자의 값이 {1, 0}으로 설정된 것으로 판단하고 앞서 설명한 바와 같이

의 값을 계산할 수 있다. 표 39는 오픈루프 파라미터 세트 지시자의 필드 사이즈가 2bits인 경우를 보여주며, 앞서 설명한 바와 같이 확장될 수 있다In addition, the DCI (or DCI format) received by the terminal includes a 1-bit open-loop power control parameter set indication (OLPC) parameter set indication field, in which case the value indicated in the field is If it is 1, the terminal determines that all values of the open-loop parameter set indicator of {first TRP, second TRP} or {first timing time, second timing time} are set to 1 as shown in Table 38 below, and as described above

value can be calculated. If the value indicated in the field is 0, the terminal indicates that the value of the open-loop parameter set indicator of {1st TRP, 2nd TRP} or {1st timing time, 2nd timing time} is {1, 0}, and as described above

value can be calculated. Table 39 shows a case where the field size of the open-loop parameter set indicator is 2 bits, and can be extended as described above.

[Table 38]

[Table 39]

<Method C-4: How to apply one open-loop parameter set indicator value to one or multiple TRP(s) set in the upper layer>

The following 1) to 2) contents can be considered as method C-4.

1) It is possible to determine whether to apply the open-loop power control parameter set indicator in DCI to the first TRP or the second TRP by using a new RRC parameter (eg, OLPC_setID).

If the base station sets a new RRC parameter (eg, OLPC_setID) to the terminal to 0, the terminal determines the open-loop power control parameter set indicator in DCI as the value indicated for the first TRP, and p0 value for the first TRP can decide Here, the operations according to the presence or absence of the SRI field and the operations when the open-loop power control parameter set indicator field values are 00 to 11 may be extended and considered in Methods C-1 to C-3. As an example, if the new RRC parameter (eg, OLPC_setID) received by the UE is set to 0 and the open-loop power control parameter set indicator field value is 1, as described in method C-1, the UE uses p0-PUSCH-SetList1- The p0 value of the first p0-PUSCH from among the p0-Lists of the P0-PUSCH-Set set to the same p0-PUSCH-SetId as the value of the first SRI field in r16 may be selected.

As another example, if the new RRC parameter (eg, OLPC_setID) received by the UE is set to 0, and the SRI field is not included in the DCI, the UE sets the lowest p0-PUSCH-SetID in the upper layer p0-PUSCH-SetList. It is possible to select the p0 value of the first p0-PUSCH from the p0-List of the P0-PUSCH-Set having .

If the base station sets a new RRC parameter (eg, OLPC_setID) to 1 for the terminal, the terminal determines the open-loop power control parameter set indicator in the DCI as the value indicated for the second TRP and p0 value for the second TRP can be decided In addition, the operations according to the presence or absence of the SRI field described in Methods C-1 to C-3 and operations when the open loop power control indicator field value is 0 or 1, 00 to 11 are also extended to determine the p0 value for the second TRP. can be applied. In this case, TRP 1 may be determined based on the p0-PUSCH-AlphaSet described above.

2) Basically, the open-loop power control parameter set indicator field value is applied to TRP1, and it can be determined whether or not to apply the open-loop power control parameter set indicator to the second TRP with a new RRC parameter (eg OLPC_setID). . If the new RRC parameter (eg OLPC_setID) value is set to 0, the UE operates based on the open loop power control parameter set indicator only for the first TRP, and if the RRC parameter (eg OLPC_setID) value is set to 1, The UE may apply the above-described method to each of TRP1 and TRP2 as in method C-2.

<Method C-5: Method of setting in the upper layer by combining methods C-1 to C-4 described above>

In order to support at least two or more of the methods C-1 to C-4 described above, the base station may instruct the terminal to determine at least one of the methods C-1 to C-4 by setting one new parameter. . That is, the base station may indicate at least one of the above methods using information transmitted through a higher rate rate, for example, a value mapped to method C-1 is 00, and a value mapped to method C-2 is 01. , a value mapped to method C-3 may be 10, and a value mapped to method C-4 may be 11. However, the embodiment of the present disclosure is not limited thereto, and it is apparent that some or all of the above-described methods and other methods may be additionally used, and thus the bit size may be changed.

Hereinafter, a method for switching between a plurality of TRPs-based repeated PUSCH transmission and a single TRP-based PUSCH repeated transmission or checking associated PUSCH power adjustment will be described. When PUSCH transmission corresponding to a plurality of TRPs is repeated, the UE may perform open-loop power control for PUSCH transmission based on higher layer related information and DCI information set as follows. In this case, the DCI format to be considered corresponds to 0_1 and 0_2, and the switching operation may be considered according to the existence of the SRI field or the open loop power control parameter set indicator field in the DCI.

First, when PUSCH transmission corresponding to a plurality of TRPs is repeated, the UE may receive DCI (eg, DCI format 0_1, 0_2) from the base station, and the DCI includes at least one SRI field (1 to 4 bits) and As described in Methods C-1 to C-4, at least one or more open-loop power control parameter set indicator fields (1 bits to 4 bits) may be included. The UE may determine that switching to open-loop power control related to repeated PUSCH transmission for a single TRP is based on the received information.

The UE switches to PUSCH transmission for a single TRP as in the 5-5 to 5-6 embodiments based on at least two or more SRI field values (eg, the first SRI field or the second SRI field) as in method C-1. can be judged to be

를 계산할 수 있다. 유사하게 두 SRI 필드가 제2 TRP에 대한 PUSCH 전송 및 제 1 TRP에 대한 PUSCH 미전송을 의미하면, 단말은 제2 TRP를 위한 PUSCH (반복)전송에 대응되는 SRI 필드 값과 두 개의 오픈루프 전력 제어 파라미터 세트 지시자 필드 중 전체 필드가 2 bits인 경우 이후 1 bit만(LSB)을 이용하고, 4 bits인 경우 이후 2 bits만(LBS) 을 고려하여 오픈루프 전력 제어 연산을 수행한다. 단말은 나머지 비트(MSB) 정보를 무시할 수 있다.When two SRI fields exist in the DCI transmitted by the base station, the UE receives each SRI field corresponding to PUSCH (repeated) transmission for the first TRP and PUSCH (repeated) transmission for the second TRP and open-loop power control parameters An open-loop power control operation may be performed by checking the set indicator field value. Specifically, if the SRI field means PUSCH transmission for the first TRP and no PUSCH transmission for the second TRP, the UE controls the SRI field value corresponding to the PUSCH (repeated) transmission for the first TRP and two open-loop power control If the entire field of the parameter set indicator field is 2 bits, only the first 1 bit (MSB) is used, and in the case of 4 bits, the open-loop power control operation is performed by considering only the first 2 bits (MBS). The UE may ignore the remaining bit (LSB) information. After all, when the UE is switched to repeated PUSCH transmission for a single TRP, the first 1 bit or 2 bits (MSB) value of the open-loop power control parameter set indicator field for the first TRP is 0 or 1, 00 to 11 by checking whether As previously described

can be calculated. Similarly, if the two SRI fields mean PUSCH transmission for the second TRP and no PUSCH transmission for the first TRP, the UE includes an SRI field value corresponding to PUSCH (repeated) transmission for the second TRP and two open-loop powers. When the entire field of the control parameter set indicator field is 2 bits, only 1 bit (LSB) is used thereafter, and when it is 4 bits, the open-loop power control operation is performed in consideration of only 2 bits (LBS). The UE may ignore the remaining bit (MSB) information.

Since the detailed operation of calculating P0 is the same as that of the various embodiments described above, C-1 to C-5, a description thereof will be omitted below.

를 계산할 수 있다. 만약 MSB 1 bit가 단일 TRP를 위한 PUSCH 반복 전송을 위해 이용된다면 LSB 1 bit는 무시될 수 있으며 기지국은 LSB 1 bit를 0으로 설정할 수 있다. 또는 오픈루프 전력 제어 파라미터 세트 지시자 필드가 {제1 TRP, 제2 TRP}, {제1 시점, 제2 시점}을 위해 4bits가 기본적으로 설정된 경우, 단말은 단일 TRP를 위해 PUSCH 반복 전송으로 스위칭 되는 경우 가장 처음 두 bits(MSB) 또는 나머지 bits(LSB) 정보가 00 내지 11인지를 확인하여 앞서 설명한 바와 같이

를 계산할 수 있다. 만약 MSB 2 bits가 단일 TRP를 위해 PUSCH 반복 전송을 위해 이용된다면 LSB 2 bits는 무시될 수 있으며 기지국은 LSB 2 bits를 00으로 설정할 수 있다. At this time, the terminal checks whether the first bit (MSB) or the last bit (LSB) information of the open-loop power control parameter set indicator field is 0 or 1.

can be calculated. If the MSB 1 bit is used for repeated PUSCH transmission for a single TRP, the LSB 1 bit may be ignored and the base station may set the LSB 1 bit to 0. Or, when the open-loop power control parameter set indicator field is set to 4 bits for {1st TRP, 2nd TRP}, {1st time, 2nd time}, the UE is switched to PUSCH repeated transmission for a single TRP In this case, as described above, it is checked whether the first two bits (MSB) or the remaining bits (LSB) information is 00 to 11.

can be calculated. If the MSB 2 bits are used for PUSCH repeated transmission for a single TRP, the LSB 2 bits may be ignored and the base station may set the LSB 2 bits to 00.

Second, if the PUSCH transmission corresponding to a plurality of TRPs is repeated, the UE does not have an SRI field in the DCI (eg, DCI format 0_1, 0_2) of the base station (SRI-PUSCH-PowerControl is not set) Method C At least one or more open-loop power control parameter set indicator fields (1 bits to 4 bits) may be received, such as -1 to C-4. The UE may determine that switching to open-loop power control related to repeated PUSCH transmission for a single TRP is based on the received information. At this time, since the SRI field in the DCI does not exist, the UE uses the TPMI field or the TPC field or another field in the DCI indicated to transmit the PUSCH in multiple TRPs, not the SRI field, whether it is repeated PUSCH transmission for a single TRP. It can be determined whether PUSCH repeated transmission for TRPs.

를 계산할 수 있다. 만약 MSB 1 bit를 단일 TRP를 위해 PUSCH 반복 전송을 위해 이용된다면 LSB 1 bit는 무시될 수 있으며 기지국은 LSB 1 bit를 0으로 설정할 수 있다. 또는 오픈루프 전력 제어 파라미터 세트 지시자 필드가 {제1 TRP, 제2 TRP}, {제1 시점, 제2 시점}을 위해 4bits가 기본적으로 설정된 경우, 단말이 단일 TRP를 위해 PUSCH 반복 전송으로 스위칭 되는 경우 가장 처음 두 bits(MSB) 또는 나머지 bits(LSB) 정보가 00 내지 11인지를 확인하여 앞서 설명한 바와 같이

를 계산할 수 있다. 만약 MSB 2 bits가 단일 TRP를 위해 PUSCH 반복 전송을 위해 이용된다면 LSB 2 bits는 무시될 수 있으며 기지국은 LSB 2 bits를 00으로 설정할 수 있다.As an example, if the SRI field does not exist in the DCI (eg, DCI format 0_1, 0_2) of the base station received by the terminal, the terminal checks 2 bits of the open-loop power control parameter set indicator field value as in method C-1, By checking whether the first bit (MSB) or the last bit (LSB) information is 0 or 1,

can be calculated. If the MSB 1 bit is used for PUSCH repeated transmission for a single TRP, the LSB 1 bit may be ignored and the base station may set the LSB 1 bit to 0. Or, when the open-loop power control parameter set indicator field is set to 4 bits for {1st TRP, 2nd TRP}, {1st time, 2nd time}, the UE is switched to PUSCH repeated transmission for a single TRP In this case, as described above, it is checked whether the first two bits (MSB) or the remaining bits (LSB) information is 00 to 11.

can be calculated. If the MSB 2 bits are used for PUSCH repeated transmission for a single TRP, the LSB 2 bits may be ignored and the base station may set the LSB 2 bits to 00.

As another example, if the SRI field in the DCI (eg, DCI format 0_1, 0_2) of the base station received by the terminal does not exist, the terminal is olpc-ParameterSetForDCI-Format0-1 in the higher layer Pusch-PowerControl-r16 as in method C-2 It can be confirmed that switching is performed to a single transmission based on the setting value of -r16 (or olpc-ParameterSetForDCI-Format0-2-r16) or a specific value of the open-loop power control parameter set indicator field. In this case, the operation of additionally checking the MSB or the LSB in DCI may be omitted.

As another example, if the SRI field in the DCI (eg, DCI format 0_1, 0_2) of the base station received by the terminal does not exist, the terminal applies a new mapping table for a plurality of TRPs in the upper layer as in method C-3 ( Example: Table 39) or the existing configuration/mapping table for a single TRP (eg Table 38) can be checked to confirm that switching to a single transmission is applied. In this case, the operation of additionally checking the MSB or the LSB in DCI may be omitted.

As another example, if the SRI field in the DCI (eg, DCI format 0_1, 0_2) of the base station received by the terminal does not exist, the terminal checks a new RRC parameter (eg, OLPC_setID) in the upper layer as in method C-4 to determine the first It is switched to a single transmission by checking whether to set the open-loop power control parameter set indicator-related information for both the TRP and the second TRP or whether to set one of the first TRP and the second TRP open-loop power control parameter set indicator that can be checked If the base station sets a new RRC parameter (eg, OLPC_setID) to a specific value (eg, 2) to the terminal, the terminal sets two through each open-loop power control parameter set indicator field for the first TRP and the second TRP in DCI. You can check the open-loop power control information for TRP. If the base station sets a new RRC parameter (eg, OLPC_setID) to the terminal to a specific value (eg, 0 or 1), the terminal indicates the open-loop power control parameter set indicator in DCI for the first TRP or the second TRP. By judging by the value, it can be confirmed that the switch is switched to the setting for the first TRP or the second TRP.

The detailed operation of calculating P0 overlaps with the descriptions of the various embodiments described above, C-1 to C-5, and thus a repeated description thereof will be omitted.

<Eighth embodiment: open-loop power control method considering multiple TRPs based on upper layer parameter settings for each TRP when SRI does not exist in DCI>

If the base station does not set SRI-PUSCH-PowerControl related information through a higher layer to the terminal, or when scheduling PUSCH repeatedly transmitted through DCI (format) for scheduling PUSCH, the DCI does not include the SRI field, the terminal It can be determined that the value of olpc-ParameterSetForDCI-Format0-1-r16 (or olpc-ParameterSetForDCI-Format0-2-r16) is set in Pusch-PowerControl-r16 and the open-loop power control parameter set indicator in DCI is included. . If the value of olpc-ParameterSetForDCI-Format0-1-r16 is set to 1, the UE means that 1 bit is included in the open-loop power control parameter set indicator in DCI, and when the value of olpc-ParameterSetForDCI-Format0-1-r16 is set to 2 It may be determined that 2 bits are included in the open-loop power control parameter set indicator in DCI.

In addition, in order to support the open-loop power control method in a PUSCH repeated transmission operation based on a plurality of TRPs as in the method described above in the seventh embodiment, the base station may set the RRC parameter for TRP 2 . For this, the base station sets p0-PUSCH-SetList1-r16, p0-PUSCH-SetList2-r16 instead of one p0-PUSCH-SetList-r16, or p0-PUSCH-SetList-r16 and p0-PUSCH-SetList-r17 Open-loop power control information for TRP 2 can be set by adding one set together with the existing p0-PUSCH-SetList-r16 like a method of setting . Meanwhile, in the above description, the case of additionally setting open-loop power control information for TRP2 has been described as an example, but open-loop power control information for a plurality of TRPs may be set, and accordingly, p0-PUSCH for a plurality of TRPs. -SetList-r16 can be set respectively. In addition, although a method of setting open-loop power control information for two TRPs is proposed below, the present disclosure may be applied to two or more TRPs. The name of the p0-PUSCH-SetList added to support repeated transmission of a plurality of TRPs-based PUSCHs may be different from the above example, and even if the names are different, the upper used for indicating p0 for each TRP URLLC It can be understood as a layer parameter. In the following embodiment, it is assumed that the base station sets higher layer parameters such as p0-PUSCH-SetList1-r16 and p0-PUSCH-SetList2-r16 to the terminal in order to indicate p0 for URLLC as an open-loop power control method for each TRP. do. Here, p0-PUSCH-SetList1-r16 may be used to indicate a p0 value for URLLC use for TRP1, and p0-PUSCH-SetLIst2-r16 may be used to indicate a p0 value for URLLC use for TRP2.

In addition, the base station has a plurality of PUSCH-PowerControl (for example, PUSCH-PowerControl is an upper layer parameter for the first TRP and PUSCH-PowerControl2 is an upper layer parameter for the second TRP) for repeated PUSCH transmission in consideration of a plurality of TRPs. or a plurality of sri-PUSCH-MappingToAddModList in PUSCH-PowerControl (for example, sri-PUSCH-MappingToAddModList is a higher layer parameter for the first TRP, and sri-PUSCH-MappingToAddModList2 is an upper layer parameter for the second TRP) Alternatively, SRI-PUSCH-PowerControl, etc. corresponding to each of a plurality of SRS resource sets may be set in the terminal. In the following embodiment, for convenience of description, it is assumed that PUSCH-PowerControl for the first TRP and PUSCH-PowerControl2 for the second TRP are configured.

의 값을 계산할 수 있다:If all SRI fields in the DCI do not exist and the open-loop power control parameter set indicator field (eg, 1 bit) value is indicated to be 1, the UE transmits the upper layers p0-PUSCH-SetList1-r16 and p0-PUSCH-SetList2-r16 Using the first p0-PUSCH value among the p0-List of the P0-PUSCH-Set having the smallest (lowest) p0-PUSCH-SetID set in my configuration, the first TRP and the second TRP or the first timing time point and for the second timing point

We can compute the value of:

를 계산하는데 이용될 수 있다.1) The first p0-PUSCH value of the p0-List of the P0-PUSCH-Set having the smallest p0-PUSCH-SetID of the p0-PUSCH-SetList1-r16 is the first TRP or the first timing point.

can be used to calculate

를 계산하는데 이용될 수 있다. 2) The first p0-PUSCH value of the p0-List of the P0-PUSCH-Set having the smallest p0-PUSCH-SetID of the p0-PUSCH-SetList2-r16 is the second TRP or the second timing point.

can be used to calculate

을 계산할 수 있다:If all SRI fields in the DCI do not exist and the open-loop power control parameter set indicator field (eg, 1 bit) value is indicated as 0, the UE uses the following method for each TRP.

can be calculated:

를 계산하는데 이용될 수 있다.1) The p0 value of the first P0-PUSCH-AlphaSet in the p0-AlphaSets in the PUSCH-PowerControl is the first TRP or the first timing point

can be used to calculate

를 계산하는데 이용될 수 있다. 2) The p0 value of the first P0-PUSCH-AlphaSet in the p0-AlphaSets in the PUSCH-PowerControl2 is the second TRP or the second timing point

can be used to calculate

의 값을 계산할 수 있다:If all the SRI fields in the DCI do not exist and the open-loop power control parameter set indicator field (eg, 2 bits) value is indicated as 01, the UE transmits the upper layer parameters p0-PUSCH-SetList1-r16 and p0-PUSCH-SetList2- Using the first p0-PUSCH value among the p0-List of the P0-PUSCH-Set having the smallest (lowest) p0-PUSCH-SetID set in r16, the first TRP and the second TRP or the first timing point, respectively, as follows and for a second timing point

We can compute the value of:

를 계산하는데 이용될 수 있다.1) The first p0-PUSCH value of the p0-List of the P0-PUSCH-Set having the smallest p0-PUSCH-SetID of the p0-PUSCH-SetList1-r16 is the first TRP or the first timing point.

can be used to calculate

를 계산하는데 이용될 수 있다. 2) The first p0-PUSCH value of the p0-List of the P0-PUSCH-Set having the smallest p0-PUSCH-SetID of the p0-PUSCH-SetList2-r16 is the second TRP or the second timing point.

can be used to calculate

의 값을 계산할 수 있다:If all the SRI fields in the DCI do not exist and the open-loop power control parameter set indicator field (eg, 2 bits) has a value of 10, the UE performs upper layer parameters p0-PUSCH-SetList1-r16 and p0-PUSCH-SetList2- Using the second p0-PUSCH value among the p0-List of P0-PUSCH-Set having the smallest (lowest) p0-PUSCH-SetID set in r16, the first TRP and the second TRP or the first timing point, respectively, as follows and for a second timing point

We can compute the value of:

를 계산하는데 이용될 수 있다. 1) The second p0-PUSCH value of the p0-List of the P0-PUSCH-Set having the smallest p0-PUSCH-SetID of the p0-PUSCH-SetList1-r16 is the first TRP or the first timing point.

can be used to calculate

를 계산하는데 이용될 수 있다.2) The second p0-PUSCH value of the p0-List of the P0-PUSCH-Set having the smallest p0-PUSCH-SetID of the p0-PUSCH-SetList2-r16 is the second TRP or the second timing point.

can be used to calculate

을 계산할 수 있다:If all SRI fields in the DCI do not exist and the value of the open-loop power control parameter set indicator field (eg, 2 bits) is indicated as 00, the UE uses the following method for each TRP.

can be calculated:

를 계산하는데 이용될 수 있다.1) The p0 value of the first P0-PUSCH-AlphaSet in the p0-AlphaSets in the PUSCH-PowerControl is the first TRP or the first timing point

can be used to calculate

를 계산하는데 이용할 수 있다.2) The p0 value of the first P0-PUSCH-AlphaSet in the p0-AlphaSets in the PUSCH-PowerControl2 is the second TRP or the second timing point

can be used to calculate

를 계산하는데 이용되고 TRP2에 대해서는 p0-PUSCH-SetList2-r16의 가장 작은 p0-PUSCH-SetID를 가지는 P0-PUSCH-Set의 p0-List 중 두 번째 p0-PUSCH 값이 제 2 TRP 또는 제2 타이밍 시점의

를 계산하는데 이용될 수 있다. 만약 새로운 상위 레이어 파라미터(예를 들어, OPLCOrder)가 '1'로 설정되었으며 상기 DCI 내 모든 SRI 필드가 존재하지 않으며 오픈루프 전력 제어 파라미터 세트 지시자 필드의 값이 11로 지시된다면, TRP1에 대해서는 p0-PUSCH-SetList1-r16의 가장 작은 p0-PUSCH-SetID를 가지는 P0-PUSCH-Set의 p0-List 중 두 번째 p0-PUSCH 값이 제 1 TRP 또는 제1 타이밍 시점의

를 계산하는데 이용되고 TRP2에 대해서는 p0-PUSCH-SetList2-r16의 가장 작은 p0-PUSCH-SetID를 가지는 P0-PUSCH-Set의 p0-List 중 첫 번째 p0-PUSCH 값이 제 2 TRP 또는 제2 타이밍 시점의

를 계산하는데 이용될 수 있다. 기지국과 단말은 새로운 상위 레이어 파라미터 (예를 들어, OPLCOrder)를 추가로 설정하지 않고 전술한 두 가지 방법 중 하나를 사전에 정의하여 지원할 수도 있다. In NR Release 16, a case in which the value of the open-loop power control parameter set indicator field (eg, 2 bits) in DCI is set to 11 is not used. However, in NR Release 17, when repeatedly transmitting a PUSCH considering a plurality of TRPs, more diverse p0 selection combinations can be supported by using a code point in which the value of the open-loop power control parameter set indicator field is 11. For example, if the value of the open-loop power control parameter set indicator field is indicated to be 11, the UE according to the new upper layer parameter setting, each p0-PUSCHSetList (p0-PUSCH-SetList1-r16 and p0-PUSCH- A combination of the first p0-PUSCH value and the second p0-PUSCH value of SetList2-r16) may be selected. As a more specific example, if a new higher layer parameter (eg, OPLCOrder) is set to '0', all SRI fields in the DCI do not exist, and the value of the open loop power control parameter set indicator field is 11. , for TRP1, the first p0-PUSCH value of the p0-List of P0-PUSCH-Set having the smallest p0-PUSCH-SetID of p0-PUSCH-SetList1-r16 is the first TRP or the first timing point.

For TRP2, the second p0-PUSCH value of the p0-List of the P0-PUSCH-Set having the smallest p0-PUSCH-SetID of the p0-PUSCH-SetList2-r16 is the second TRP or the second timing point. of

can be used to calculate If a new higher layer parameter (eg, OPLCOrder) is set to '1', all SRI fields in the DCI do not exist, and the value of the open-loop power control parameter set indicator field is indicated as 11, p0- for TRP1 The second p0-PUSCH value of the p0-List of the P0-PUSCH-Set having the smallest p0-PUSCH-SetID of the PUSCH-SetList1-r16 is the first TRP or the first timing point.

For TRP2, the first p0-PUSCH value of the p0-List of the P0-PUSCH-Set having the smallest p0-PUSCH-SetID of the p0-PUSCH-SetList2-r16 is the second TRP or the second timing point. of

can be used to calculate The base station and the terminal may define and support one of the above two methods in advance without additionally setting a new higher layer parameter (eg, OPLCOrder).

를 계산하는데 이용되고 TRP2에 대해서는 p0-PUSCH-SetList2-r16의 가장 작은 p0-PUSCH-SetID를 가지는 P0-PUSCH-Set의 p0-List 중 첫 번째 p0-PUSCH 값이 제 2 TRP 또는 제2 타이밍 시점의

를 계산하는데 이용될 수 있다. 새로운 상위 레이어 파라미터 (예를 들어, TRPSelectionForOPLC)가 '1'로 설정된 경우는 TRP1에 대해서는 p0-PUSCH-SetList1-r16의 가장 작은 p0-PUSCH-SetID를 가지는 P0-PUSCH-Set의 p0-List 중 첫 번째 p0-PUSCH 값이 제 1 TRP 또는 제1 타이밍 시점의

를 계산하는데 이용되고 TRP2에 대해서는 PUSCH-PowerControl2 내 p0-AlphaSets 내 첫 번째 P0-PUSCH-AlphaSet의 p0 값을 제 2 TRP 또는 제2 타이밍 시점의

를 계산하는데 이용될 수 있다. As another example, if all SRI fields in the DCI do not exist and the value of the open-loop power control parameter set indicator field is indicated as 11, a new upper layer parameter is set (or according to a method defined in advance by the base station and the terminal) TRP1 A value of p0 for p0 may be selected based on PUSCH-PowerControl, and a value of p0 for TRP2 may be selected based on p0-PUSCHSetList2-r16. Alternatively, the p0 value for TRP1 may be selected based on p0-PUSCHSetList1-r16 and p0 for TRP2 may be selected based on PUSCH-PowerControl2. To describe a more specific method, if a new higher layer parameter (eg, TRPSelectionForOPLC) is set to '0', all SRI fields in the DCI do not exist, and the value of the open loop power control parameter set indicator field is indicated as 11 , for TRP1, the p0 value of the first P0-PUSCH-AlphaSet in the p0-AlphaSets in the PUSCH-PowerControl is the first TRP or the first timing point.

For TRP2, the first p0-PUSCH value of the p0-List of the P0-PUSCH-Set having the smallest p0-PUSCH-SetID of the p0-PUSCH-SetList2-r16 is the second TRP or the second timing point. of

can be used to calculate When the new upper layer parameter (eg, TRPSelectionForOPLC) is set to '1', for TRP1, the first of the p0-List of P0-PUSCH-Set having the smallest p0-PUSCH-SetID of p0-PUSCH-SetList1-r16 th p0-PUSCH value of the first TRP or the first timing point

For TRP2, the p0 value of the first P0-PUSCH-AlphaSet in the p0-AlphaSets in the PUSCH-PowerControl2 is the second TRP or the second timing point.

can be used to calculate

The above-described methods are an example of a case where all SRI fields in the DCI do not exist and the value of the open-loop power control parameter set indicator field is indicated as 11, and similar other combinations (eg, the second p0-PUSCH of the p0-List) value, etc.).

This operation is optional when reporting the UE capability that the UE can additionally support separately from the above-described operation (operation when the value of the open-loop power control parameter set indicator field is set to 00, 01, or 10) It can be supported as an (optional) action.

At this time, the base station sets the above-described new higher layer parameter (eg, OPLCOrder or TRPSelectionForOPLC) based on the UE capability in which the UE reports whether the corresponding operation is supported, or a new for indicating whether the corresponding operation is supported. An operation when the value of the open-loop power control parameter set indicator field is indicated as 11 may be supported by setting an upper layer parameter (eg, enableDiffOLPC) to a value such as 'enable'. If the base station does not set a higher layer parameter (eg, OPLCOrder or TRPSelectionForOPLC) for the operation when the value of the open-loop power control parameter set indicator field is indicated as 11, the terminal does not set it, and for indicating whether the operation is supported If the upper layer parameter (eg, enableDiffOLPC) is not set to the terminal or is set to a value such as 'disable' to indicate that the corresponding operation is not supported, the base station sets the value of the open-loop power control parameter set indicator field to 11 and the terminal does not perform the operation when the value of the open-loop power control parameter set indicator field is indicated as 11 (or the terminal expects the operation when the value of the open-loop power control parameter set indicator field is indicated as 11) I never do that).

<Ninth embodiment: When only one of the two SRI fields in DCI exists, open-loop power control method considering multiple TRP based on upper layer parameter setting for each TRP>

The above-described seventh or eighth embodiment describes the operation of a case in which two or more SRI fields are included in DCI and a case in which all SRI fields are not included in order to transmit a PUSCH with a plurality of TRPs. This means that the number of SRS resources for two SRS resource sets configured to transmit PUSCH in a plurality of TRPs is the same. However, if the number of SRS resources for the two SRS resource sets is set to be unequal by setting the upper layer parameter, only one SRI field among the two SRI fields may exist in the DCI and the other SRI field may not exist. For example, when performing PUSCH repeated transmission considering a plurality of TRPs based on the codebook, the number of SRS resources in the SRS resource set related to the first TRP is 2, but the number of SRS resources in the SRS resource set related to the second TRP is 1 It can be assumed that In this case, since the number of bits of the first SRI field included in the DCI is 1, but the number of bits of the second SRI field is 0, only one SRI field may exist. Similarly, depending on the number of SRS resources of the upper layer parameter-based SRS resource set, there may be a case where only the second SRI field exists. As such, when only one of the two SRI fields is included in the DCI and the open-loop power control parameter indicator indicates DCI, the p0 value of each TRP may be determined depending on whether the SRI field in the DCI exists. .

A case in which one SRI field and an open-loop power control parameter set indicator exist in DCI will be described through the following specific example. At this time, the base station sets p0-PUSCH-SetList1-r16 and PUSCH-PowerControl to the UE to determine the power transmission parameters for TRP1, and p0-PUSCH-SetList2-r16 and PUSCH to determine the power transmission parameters for TRP2. - Assume that you set PowerControl2.

If only the SRI field for TRP1 exists in DCI (that is, the number of SRS resources in the SRS resource set for TRP1 is greater than 1, and the number of SRS resources in the SRS resource set for TRP2 is 1) Open loop power If the control parameter set indicator indicates 1, the p0 value for each TRP is determined as follows:

를 계산하는데 이용될 수 있다.1) In p0-PUSCH-SetList1-r16, the first p0-PUSCH value of the p0-List of P0-PUSCH-Set having p0-PUSCH-SetID of the same value as that indicated by the SRI field for TRP1 is the first TRP or at the first timing point

can be used to calculate

를 계산하는데 이용될 수 있다. 2) The first p0-PUSCH value of the p0-List of the P0-PUSCH-Set having the smallest p0-PUSCH-SetID of the p0-PUSCH-SetList2-r16 is the second TRP or the second timing point.

can be used to calculate

If only the SRI field for TRP1 exists in DCI (that is, the number of SRS resources in the SRS resource set for TRP1 is greater than 1, and the number of SRS resources in the SRS resource set for TRP2 is 1) Open loop power If the control parameter set indicator indicates 0, the p0 value for each TRP may be determined as follows:

를 계산하는데 이용될 수 있다.1) The p0 value of P0-PUSCH-AlphaSet indicated by p0-PUSCH-ApphaSetId set in SRI-PUSCH-PowerContol set to sri-PUSCH-PowerControlId equal to the value of SRI field for TRP1 indicated by DCI within PUSCH-PowerControl of this first TRP or first timing point

can be used to calculate

를 계산하는데 이용될 수 있다. 2) The p0 value of the first P0-PUSCH-AlphaSet in the p0-AlphaSets in the PUSCH-PowerControl2 is the second TRP or the second timing point

can be used to calculate

If only the SRI field for TRP2 exists in DCI (that is, the number of SRS resources in the SRS resource set for TRP2 is greater than 1, and the number of SRS resources in the SRS resource set for TRP1 is 1) Open loop power If the control parameter set indicator indicates 1, the p0 value for each TRP may be determined as follows:

를 계산하는데 이용될 수 있다.1) The first p0-PUSCH value of the p0-List of the P0-PUSCH-Set having the smallest p0-PUSCH-SetID of the p0-PUSCH-SetList1-r16 is the first TRP or the first timing point.

can be used to calculate

를 계산하는데 이용될 수 있다.2) In p0-PUSCH-SetList2-r16, the first p0-PUSCH value of the p0-List of the P0-PUSCH-Set having p0-PUSCH-SetID of the same value as that indicated by the SRI field for TRP2 is the second TRP or at the second timing point

can be used to calculate

If only the SRI field for TRP2 exists in DCI (that is, the number of SRS resources in the SRS resource set for TRP2 is greater than 1, and the number of SRS resources in the SRS resource set for TRP1 is 1) Open loop power If the control parameter set indicator indicates 0, the p0 value for each TRP may be determined as follows:

를 계산하는데 이용될 수 있다.1) The p0 value of the first P0-PUSCH-AlphaSet in the p0-AlphaSets in the PUSCH-PowerControl is the first TRP or the first timing point

can be used to calculate

를 계산하는데 이용될 수 있다.1) The p0 value of P0-PUSCH-AlphaSet indicated by p0-PUSCH-ApphaSetId set in SRI-PUSCH-PowerContol set to the same sri-PUSCH-PowerControlId as the value of the SRI field for TRP2 indicated by DCI in PUSCH-PowerControl2 of this second TRP or second timing point

can be used to calculate

As another example of the operation, in order to simplify the operation other than the above-described method, when only one SRI field is present in the DCI, all SRIs are absent as described above in the eighth embodiment regardless of the value indicated by the SRI. It is assumed that p0 values for the two TRPs may be determined according to the value of the open-loop power control parameter set indicator.

22 is a diagram illustrating a structure of a terminal in a wireless communication system according to an embodiment of the present disclosure.

Referring to FIG. 22 , the terminal may include a transceiver 22-00, a memory 22-05, and a processor 22-10. According to the communication method of the terminal described above, the transceiver 22-00 and the processor 22-10 of the terminal may operate. However, the components of the terminal are not limited to the above-described example. For example, the terminal may include more or fewer components than the aforementioned components. In addition, the transceiver 22-00, the memory 22-05, and the processor 22-10 may be implemented in the form of one chip.

The transceiver 22-00 may transmit/receive a signal to/from the base station. Here, the signal may include control information and data. To this end, the transceiver 22-00 may include an RF transmitter that up-converts and amplifies the frequency of a transmitted signal, and an RF receiver that low-noise amplifies and down-converts a received signal. However, this is only an embodiment of the transceiver 22-00, and components of the transceiver 22-00 are not limited to the RF transmitter and the RF receiver.

In addition, the transceiver 22-00 may receive a signal through a wireless channel, output it to the processor 22-10, and transmit a signal output from the processor 22-10 through a wireless channel.

The memory 22-05 may store programs and data necessary for the operation of the terminal. Also, the memory 22-05 may store control information or data included in a signal transmitted and received by the terminal. The memory 22-05 may be configured as a storage medium or a combination of storage media, such as ROM, RAM, hard disk, CD-ROM, and DVD. Also, the number of memories 22-05 may be plural.

In addition, the processor 22-10 may control a series of processes so that the terminal can operate according to the above-described embodiment. For example, the processor 22-10 may receive DCI composed of two layers and control the components of the terminal to receive a plurality of PDSCHs at the same time. The processor 22-10 may be plural, and the processor 22-10 may execute a program stored in the memory 22-05 to perform a component control operation of the terminal.

23 is a diagram illustrating a structure of a base station in a wireless communication system according to an embodiment of the present disclosure.

Referring to FIG. 23 , the base station may include a transceiver 23-00, a memory 23-05, and a processor 23-10. According to the above-described communication method of the base station, the transceiver 23-00 and the processor 23-10 of the base station may operate. However, the components of the base station are not limited to the above-described example. For example, the base station may include more or fewer components than the above-described components. In addition, the transceiver 23-00, the memory 23-05, and the processor 23-10 may be implemented in the form of a single chip.

The transceiver 23-00 may transmit/receive a signal to/from the terminal. Here, the signal may include control information and data. To this end, the transceiver 23-00 may include an RF transmitter that up-converts and amplifies the frequency of a transmitted signal, and an RF receiver that low-noise amplifies and down-converts a received signal. However, this is only an embodiment of the transceiver 23-00, and components of the transceiver 23-00 are not limited to the RF transmitter and the RF receiver.

In addition, the transceiver 23-00 may receive a signal through a wireless channel, output it to the processor 23-10, and transmit a signal output from the processor 23-10 through a wireless channel.

The memory 23-05 may store programs and data necessary for the operation of the base station. Also, the memory 23-05 may store control information or data included in a signal transmitted and received by the base station. The memories 23 - 05 may be configured of a storage medium such as a ROM, a RAM, a hard disk, a CD-ROM, and a DVD, or a combination of storage media. Also, the number of memories 23 - 05 may be plural.

The processor 23-10 may control a series of processes so that the base station can operate according to the above-described embodiment of the present disclosure. For example, the processor 23-10 may control each component of the base station to configure two-layer DCIs including allocation information for a plurality of PDSCHs and transmit them. The processor 23-10 may be plural, and the processor 23-10 may execute a program stored in the memory 23-05 to perform a component control operation of the base station.

Methods according to the embodiments described in the claims or specifications of the present disclosure may be implemented in the form of hardware, software, or a combination of hardware and software.

When implemented in software, a computer-readable storage medium storing one or more programs (software modules) may be provided. One or more programs stored in the computer-readable storage medium are configured to be executable by one or more processors in an electronic device (device). One or more programs include instructions for causing an electronic device to execute methods according to embodiments described in a claim or specification of the present disclosure.

Such programs (software modules, software) include random access memory, non-volatile memory including flash memory, read only memory (ROM), electrically erasable programmable ROM (EEPROM: Electrically Erasable Programmable Read Only Memory), magnetic disc storage device, Compact Disc-ROM (CD-ROM), Digital Versatile Discs (DVDs), or any other form of It may be stored in an optical storage device or a magnetic cassette. Alternatively, it may be stored in a memory composed of a combination of some or all thereof. In addition, each configuration memory may be included in plurality.

In addition, the program accesses through a communication network composed of a communication network such as the Internet, Intranet, Local Area Network (LAN), Wide LAN (WLAN), or Storage Area Network (SAN), or a combination thereof. It may be stored in an attachable storage device that can be accessed. Such a storage device may be connected to a device implementing an embodiment of the present disclosure through an external port. In addition, a separate storage device on the communication network may be connected to the device implementing the embodiment of the present disclosure.

In the specific embodiments of the present disclosure described above, elements included in the invention are expressed in the singular or plural according to the specific embodiments presented. However, the singular or plural expression is appropriately selected for the context presented for convenience of description, and the present disclosure is not limited to the singular or plural component, and even if the component is expressed in plural, it is composed of a singular or singular. Even an expressed component may be composed of a plurality of components.

On the other hand, the embodiments of the present disclosure disclosed in the present specification and drawings are merely provided for specific examples to easily explain the technical content of the present disclosure and help the understanding of the present disclosure, and are not intended to limit the scope of the present disclosure. That is, it is apparent to those of ordinary skill in the art to which other modifications are possible based on the technical spirit of the present disclosure. In addition, each of the above embodiments may be operated in combination with each other as needed. For example, the base station and the terminal may be operated by combining parts of one embodiment and another embodiment of the present disclosure. For example, the base station and the terminal may be operated by combining parts of the first embodiment and the second embodiment of the present disclosure. In addition, although the above embodiments have been presented based on the FDD LTE system, other modifications based on the technical idea of the embodiment may be implemented in other systems such as TDD LTE system, 5G or NR system.

On the other hand, in the drawings for explaining the method of the present invention, the order of description does not necessarily correspond to the order of execution, and the precedence relationship may be changed or may be executed in parallel.

Alternatively, the drawings for explaining the method of the present invention may omit some components and include only some components within a range that does not impair the essence of the present invention.

In addition, the method of the present invention may be implemented in a combination of some or all of the contents contained in each embodiment within a range that does not impair the essence of the invention.

Claims (1)

A method for processing an uplink signal in a wireless communication system, the method comprising:
Receiving a first control signal transmitted from the base station;
processing the received first control signal; and
and transmitting a second uplink signal generated based on the processing to the base station.

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