KR20210123993A - Method and apparatus for transmission and reception of data in communication system - Google Patents

Abstract

Disclosed are a communication technique converging a fifth-generation (5G) communication system for supporting a higher data transmission rate after a fourth-generation (4G) with Internet of things (IoT) technology, and a system thereof. The present invention can be applied to intelligent services (e.g., smart home, smart building, smart city, smart car or connected car, healthcare, digital education, retail business, security and safety related services, etc.) on the basis of 5G communication technology and the IoT-related technology. According to the present invention, a method of a terminal in a wireless communication system comprises the following steps: monitoring a physical downlink control channel (PDCCH); checking whether a scheduling constraint condition is determined on the basis of downlink control information (DCI) decoded as a monitoring result; when determination of the scheduling constraint condition is required, checking whether a physical downlink shared channel (PDSCH) scheduled through the DCI satisfies the scheduling restriction condition; and when the scheduling constraint condition is satisfied, receiving data from a base station through the PDSCH.

Description

Method and apparatus for transmitting and receiving data in a communication system

The present disclosure relates to a communication system, and more particularly, to a method and apparatus for scheduling and transmitting/receiving data according to a data amount or data rate that a terminal can process.

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 the 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 after the LTE system (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 mitigate the path loss of radio waves and increase the propagation distance of radio waves in the ultra-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 RAN), and 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, advanced coding modulation (ACM) methods such as FQAM (Hybrid FSK and QAM Modulation) and SWSC (Sliding Window Superposition Coding), and advanced access technologies such as Filter Bank Multi Carrier (FBMC), 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 the 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 machine type communication (MTC), 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.

As various services can be provided according to the above-mentioned and the development of wireless communication systems, a method for smoothly providing these services is required.

In a wireless communication system, particularly, in an NR system, a data rate that the terminal can support may be predetermined between the base station and the terminal. This may be calculated using the maximum frequency band supported by the terminal, the maximum modulation order, the maximum number of layers, and the like. The base station cannot schedule the amount of data corresponding to the instantaneous data rate higher than the calculated data rate to the terminal. In addition, the scheduling of the base station and the data transmission/reception operation of the terminal may vary according to the method of calculating the instantaneous data rate.

The NR system may provide not only data communication between the base station and the terminal, but also data communication between the terminal and the terminal. In this case, it is necessary to determine a data rate that the terminal can support in data communication between the terminal and the terminal. And it is necessary to define the operation of the terminal according to the determined data rate and scheduling information.

The present invention for solving the above problems is a control signal processing method 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 control signal generated based on the processing to the base station.

According to the present invention, the terminal and the base station can determine the maximum data rate in communication between the terminal and the terminal or the communication between the terminal and the base station, and the scheduling device performs scheduling so as not to exceed the maximum data rate supported by the opposite terminal. Thus, data can be transmitted and received efficiently.

1 is a diagram illustrating a basic structure of a time-frequency domain, which is a radio resource domain in which the data or control channel is transmitted in downlink or uplink of an NR system.
2 and 3 are diagrams for explaining a state in which data for eMBB, URLLC, and mMTC, which are services considered in a 5G or NR system, are allocated in frequency-time resources.
4 is a diagram for explaining a process in which one transport block is divided into several code blocks and a CRC is added according to an embodiment of the present invention.
5 is a diagram for explaining a method in which an outer code is used and transmitted according to an embodiment of the present invention.
6 is a block diagram for explaining the structure of a communication system using an outer code according to an embodiment of the present invention.
7 is a view for explaining a method of generating one or more parity code blocks by applying a second channel code or an outer code to several code blocks divided from one transport block according to an embodiment of the present invention.
8A illustrates an example of groupcasting transmission in a wireless communication system according to various embodiments of the present disclosure.
8B illustrates an example of hybrid automatic repeat request (HARQ) feedback transmission according to group casting in a wireless communication system according to various embodiments of the present disclosure.
9 illustrates an example of unicasting transmission in a wireless communication system according to various embodiments of the present disclosure.
10A illustrates an example of sidelink data transmission according to scheduling of a base station in a wireless communication system according to various embodiments of the present disclosure.
10B illustrates an example of sidelink data transmission without scheduling of a base station in a wireless communication system according to various embodiments of the present disclosure.
11A illustrates an example of a channel structure of a slot used for sidelink communication in a wireless communication system according to various embodiments of the present disclosure.
11B is a flowchart illustrating a method for determining whether a UE has received PDSCH decoding, PUSCH transmission, and PSSCH reception according to an embodiment of the present invention.
12 is a diagram illustrating an example in which a sidelink symbol or channel is mapped to a slot and used.
13 is a diagram illustrating an example of determining a slot including the specific time in a carrier configured for upper signaling to a terminal according to an embodiment of the present invention.
14 is a diagram illustrating an operation of a terminal for downlink reception or sidelink transmission/reception according to an embodiment of the present invention.
15 is another diagram illustrating an operation of a terminal for downlink reception or sidelink transmission/reception according to an embodiment of the present invention.
16 is another diagram illustrating an operation of a terminal for downlink reception or sidelink transmission/reception according to an embodiment of the present invention.
17 is another diagram illustrating a terminal operation for downlink reception or PSSCH transmission/reception according to an embodiment of the present invention.
18 is another diagram illustrating an operation of a terminal for downlink reception or PSSCH transmission/reception according to an embodiment of the present invention.
19 is a diagram illustrating an operation of a base station according to an embodiment of the present invention.
20A is another diagram illustrating an operation of a base station according to an embodiment of the present invention.
20B is a diagram illustrating an embodiment in which a base station determines a scheduling resource of a terminal according to an embodiment of the present invention.
21 is a block diagram of a terminal according to an embodiment of the present invention.
22 is a block diagram of a base station according to an embodiment of the present invention.

NR (New Radio access technology), a new 5G communication, is designed to allow various services to be freely multiplexed in time and frequency resources. can be freely assigned. In order to provide an optimal service to a terminal in wireless communication, it is important to optimize data transmission through measurement of channel quality and interference, and accordingly, accurate channel state measurement is essential. However, unlike 4G communication, where the channel and interference characteristics do not change significantly depending on frequency resources, in the case of 5G channels, the channel and interference characteristics change greatly depending on the service. support of a subset of On the other hand, in the NR system, the types of supported services can be divided into categories such as enhanced mobile broadband (eMBB), massive machine type communications (mMTC), and ultra-reliable and low-latency communications (URLLC). eMBB is a high-speed transmission of high-capacity data, mMTC is a service that minimizes terminal power and connects multiple terminals, and URLLC is a service that aims for high reliability and low latency. Different requirements may be applied according to the type of service applied to the terminal.

Meanwhile, as research on a next-generation communication system is in progress, various methods for scheduling communication with a terminal are being discussed. Accordingly, there is a need for an efficient scheduling and data transmission/reception method in consideration of the characteristics of a next-generation communication system.

In this way, a plurality of services may be provided to the user in the communication system, and in order to provide such a plurality of services to the user, a method and an apparatus using the same may be required to provide each service within the same time period according to the characteristics. can

Hereinafter, embodiments of the present disclosure 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 disclosure pertains and are not directly related to the present disclosure will be omitted. This is to more clearly convey the gist of the present disclosure without obscuring the gist of the present disclosure 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 disclosure, 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 disclosure is not limited to the embodiments disclosed below, but may be implemented in a variety of different forms, only the present embodiments allow the present disclosure to be complete, and those of ordinary skill in the art to which the present disclosure pertains. It is provided to fully understand 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 is also possible that the instructions stored in the flow chart block(s) 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 is also possible that instructions for performing the processing equipment 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 blocks to occur out of order. For example, two blocks shown one after another may in fact be performed substantially simultaneously, or it is possible that the blocks are sometimes performed in the reverse order according to the corresponding function.

At this time, the term '~ unit' used in this embodiment means software or hardware components such as FPGA or ASIC, and '~ unit' performs certain roles. However, '-part' is not limited to software or hardware. The '~ unit' may be configured to reside on an addressable storage medium or may be configured to refresh one or more processors. Thus, as an example, '~' denotes components such as software components, object-oriented software components, class components, and task components, and processes, functions, properties, and 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, in an embodiment, '~ unit' may include one or more processors.

A wireless communication system, for example, 3GPP high speed packet access (HSPA), long term evolution (LTE) or evolved universal terrestrial radio access (E-UTRA), LTE-Advanced (LTE-A), HRPD (high rate packet data) of 3GPP2, UMB (ultra mobile broadband), and IEEE 802.16e, such as communication standards, such as high-speed and high-quality packet data service is developed as a broadband wireless communication system are doing In addition, a communication standard of 5G or NR (new radio) is being made as a 5G wireless communication system.

As a representative example of a broadband wireless communication system, an orthogonal frequency division multiplexing (OFDM) scheme is adopted in a downlink (DL) and an uplink in the NR system. More specifically, a cyclic-prefix OFDM (CP-OFDM) scheme is employed in the downlink, and two discrete Fourier transform spreading OFDM (DFT-S-OFDM) schemes are employed in the uplink along with the CP-OFDM. The uplink refers to a radio link in which a user equipment (UE) or a mobile station (MS) transmits data or a control signal to a base station (gNode B, or base station (BS)). It means a wireless link that transmits data or control signals. In this multiple access method, each user's data or control information can be distinguished by allocating and operating the time-frequency resources to which the data or control information is to be transmitted for each user so that they do not overlap each other, that is, orthogonality is established. .

The NR system employs a hybrid automatic repeat request (HARQ) method for retransmitting the corresponding data in the physical layer when a decoding failure occurs in the initial transmission. In the HARQ scheme, when the receiver fails to correctly decode (decode) data, the receiver transmits information (negative acknowledgment: NACK) notifying the transmitter of decoding failure so that the transmitter can retransmit the data in the physical layer. The receiver may improve data reception performance by combining data retransmitted by the transmitter with data that has previously failed to be decoded. In addition, when the receiver correctly decodes data, it is possible to transmit information (acknowledgment: ACK) informing the transmitter of decoding success so that the transmitter can transmit new data.

1 is a diagram illustrating a basic structure of a time-frequency domain, which is a radio resource domain in which the data or control channel is transmitted in downlink or uplink of an NR system.

또는

개의 서브캐리어(1-04)로 구성될 수 있다.In FIG. 1 , the horizontal axis represents the time domain, and the vertical axis represents the frequency domain. The minimum transmission unit in the time domain is an OFDM symbol, and N _symb OFDM symbols 1-02 may be gathered to form one slot 1-06. The length of the subframe may be defined as 1.0 ms, and the radio frame 1-14 may be defined as 10 ms. The minimum transmission unit in the frequency domain is a subcarrier, and the bandwidth of the entire system transmission bandwidth is the total

or

It may be composed of subcarriers 1-04.

,

및 N_RB는 시스템 전송 대역의 대역폭에 비례한다. 또한, 단말에게 스케줄링 되는 RB 개수에 비례하여 데이터 레이트가 증가할 수 있다. A basic unit of a resource in the time-frequency domain is a resource element (1-12, Resource Element; RE), which may be represented by an OFDM symbol index and a subcarrier index. A resource block (1-08, Resource Block; RB or Physical Resource Block; PRB) includes N _symb consecutive OFDM symbols 1-02 _{in the time domain and N RB} consecutive subcarriers 1-10 in the frequency domain. can be defined as Accordingly, one RB (1-08) may be composed _{of N symb} x N _{RB REs.} In general, the minimum transmission unit of data is an RB unit. In NR systems, in general, N _symb = 14, N _RB =12,

,

and N _RB are proportional to the bandwidth of the system transmission band. Also, the data rate may increase in proportion to the number of RBs scheduled for the UE.

In the case of an FDD system in which the downlink and the uplink are divided by frequency in the NR system, the downlink transmission bandwidth and the uplink transmission bandwidth may be different from each other. The channel bandwidth represents an RF bandwidth corresponding to a system transmission bandwidth. Table 1 shows the correspondence between the system transmission bandwidth and the channel bandwidth defined in the LTE system, which is the 4th generation wireless communication before the NR system. For example, an LTE system having a 10 MHz channel bandwidth may be configured with a transmission bandwidth of 50 RBs.

[Table 1]

The NR system may operate in a channel bandwidth wider than that of LTE presented in Table 1.

The bandwidth of the NR system may have the configuration shown in Tables 2 and 3.

[Table 2] Composition of FR1 (Frequency Range 1)

[Table 3] Composition of FR2 (Frequency Range 2)

In the NR system, the frequency range can be divided into FR1 and FR2 and defined as follows.

In the above, the scope of FR1 and FR2 may be changed and applied differently. For example, the frequency range of FR1 may be changed and applied from 450 MHz to 7125 MHz.

In the NR system, scheduling information for downlink data or uplink data may be transmitted from a base station to a terminal through downlink control information (DCI). DCI is defined according to various formats, and each format is whether it is scheduling information for uplink data (UL grant) or scheduling information for downlink data (DL grant), whether it is a compact DCI with a small size of control information, Whether spatial multiplexing using multiple antennas is applied, whether DCI for power control, etc. may be indicated. For example, DCI format 1-1, which is scheduling control information (DL grant) for downlink data, may include at least one of the following control information.

- Carrier indicator: indicates which frequency carrier is transmitted.

- DCI format indicator: This is an indicator for distinguishing whether the corresponding DCI is for downlink or uplink.

- Bandwidth part (BWP) indicator: indicates which BWP is transmitted.

- Frequency domain resource allocation: indicates an RB in the frequency domain allocated for data transmission. The resource to be expressed is determined according to the system bandwidth and resource allocation method.

- Time domain resource allocation: indicates in which OFDM symbol in which slot the data-related channel is to be transmitted.

- VRB-to-PRB mapping: indicates how to map a virtual RB (VRB) index and a physical RB (PRB) index.

- Modulation and coding scheme (MCS): indicates the modulation scheme and coding rate used for data transmission. That is, it is possible to indicate a coding rate value capable of indicating a transport block size (TBS) and channel coding information together with information on whether it is QPSK, 16QAM, 64QAM, or 256QAM.

- CBG transmission information (codeblock group transmission information): indicates information on which CBG is transmitted when CBG retransmission is configured.

- HARQ process number (HARQ process number): It indicates the process number of HARQ.

- New data indicator (New data indicator): indicates whether HARQ initial transmission or retransmission.

- Redundancy version: indicates a redundancy version of HARQ.

- Transmit power control (TPC) command for PUCCH (physical uplink control channel): indicates a transmit power control command for PUCCH, which is an uplink control channel.

In the case of PUSCH transmission, time domain resource assignment may be transmitted by information about a slot in which the PUSCH is transmitted, and the number of symbols L to which the start symbol position S and the PUSCH are mapped in the corresponding slot. Here, S may be a relative position from the start of the slot, L may be the number of consecutive symbols, and S and L may be determined from start and length indicator values (SLIV) defined as follows. can

In the NR system, information (eg, in the form of a table) including information about a slot in which a SLIV value, a PDSCH, a PUSCH mapping type, and a slot in which a PDSCH and PUSCH are transmitted can be configured in one row through RRC configuration. . Thereafter, in time domain resource allocation of DCI, by indicating an index value in a set table, the base station can deliver information about the SLIV value, PDSCH, PUSCH mapping type, PDSCH, and slot in which the PUSCH is transmitted to the terminal.

In the NR system, the PUSCH mapping type may be defined as type A (type A) and type B (type B). In PUSCH mapping type A, the first symbol among DMRS symbols may be located in the second or third OFDM symbol in the slot. In the PUSCH mapping type B, the first symbol among DMRS symbols may be located in the first OFDM symbol in the time domain resource allocated for PUSCH transmission.

In the NR system, PDSCH mapping types may be defined as type A (type A) and type B (type B). The first symbol among DMRS symbols may be located in the first symbol of the PDSCH.

Tables 4 and 5 show combinations of S and L supported for each type of PDSCH and PUSCH.

[Table 4]

[Table 5]

DCI may be transmitted on a physical downlink control channel (PDCCH) (or control information, hereinafter, to be used in combination), which is a downlink physical control channel through channel coding and modulation process.

In general, DCI is independently scrambled with a specific radio network temporary identifier (RNTI) (or terminal identifier) for each terminal, a cyclic redundancy check (CRC) is added, channel coded, and each independent PDCCH is configured and transmitted. can be The PDCCH may be mapped and transmitted in a control resource set (CORESET) configured for the UE.

Downlink data may be transmitted on a physical downlink shared channel (PDSCH), which is a physical channel for downlink data transmission. The PDSCH may be transmitted after the control channel transmission period, and scheduling information such as a specific mapping position and a modulation method in the frequency domain may be determined based on DCI transmitted through the PDCCH.

Through MCS among control information constituting DCI, the base station may notify the UE of the modulation scheme applied to the PDSCH to be transmitted and the size of data to be transmitted (TBS). According to an embodiment, the MCS may consist of 5 bits or more or fewer bits. TBS corresponds to the size before channel coding for error correction is applied to data (transport block: TB) to be transmitted by the base station.

In the present disclosure, a transport block (TB) refers to a medium access control (MAC) header, a MAC control element (CE), one or more MAC service data unit (SDU), and a padding bit. may include According to another example, the TB may indicate a data unit or MAC protocol data unit (PDU) that is lowered from the MAC layer to the physical layer.

Modulation methods supported by the NR system are QPSK (quadrature phase shift keying), 16QAM (quadrature amplitude modulation), 64QAM, and 256QAM, and each modulation order (Qm) corresponds to 2, 4, 6, 8. do. That is, 2 bits per symbol can be transmitted for QPSK modulation, 4 bits per symbol for 16QAM modulation, 6 bits per symbol for 64QAM modulation, and 8 bits per symbol for 256QAM modulation.

2 and 3 are diagrams for explaining a state in which data for eMBB, URLLC, and mMTC, which are services considered in a 5G or NR system, are allocated in frequency-time resources.

2 and 3, it can be confirmed how frequency and time resources are allocated for information transmission in each system.

First, FIG. 2 shows a state in which data for eMBB, URLLC, and mMTC are allocated in the entire system frequency band (2-00). URLLC data (2-03, 2-05, 2-07) is generated while eMBB data (2-01) and mMTC data (2-09) are allocated and transmitted in a specific frequency band, and URLLC data (2-03) , 2-05, 2-07), the base station or the terminal empties the part to which eMBB data (2-01) and mMTC data (2-09) are already allocated, or does not transmit URLLC data ( 2-03, 2-05, 2-07) can be transmitted. Among the above-mentioned services, since URLLC needs to reduce delay time, URLLC data (2-03, 2-05, 2-07) is allocated and transmitted to a part of the resource to which eMBB data (2-01) is allocated. can Of course, if the URLLC data (2-03, 2-05, 2-07) is additionally allocated and transmitted in the resource to which the eMBB data (2-01) is allocated, the eMBB data may not be transmitted in the overlapping frequency-time resource. Therefore, the transmission performance of eMBB data may be lowered. That is, in this case, eMBB data transmission failure may occur due to allocation of URLLC data.

In FIG. 3 , a method of transmitting services and data in each subband 3-02, 3-04, and 3-06 by dividing the entire system frequency band 3-00 will be described. Information related to subband configuration may be predetermined, and this information may be transmitted from the base station to the terminal through higher level signaling. According to another example, the information related to the subband may be arbitrarily divided by the base station or the network node to provide services to the terminal without transmitting additional subband configuration information. 3, subband 3-02 transmits eMBB data (3-08), subband 3-04 transmits URLLC data (3-10, 3-12, 3-14), and subband 3-06 transmits mMTC data (3-16) is assumed to be used for transmission.

In all embodiments, a length of a transmission time interval (TTI) used for transmitting URLLC data may be shorter than a length of a TTI used for transmitting eMBB data or mMTC data. In addition, the response of information related to URLLC data can be transmitted faster than eMBB data or mMTC data, and thus information can be transmitted and received with low delay. The structure of a physical layer channel used for each type to transmit the above-described three services or data may be different. For example, at least one of a length of a transmission time interval (TTI), an allocation unit of a frequency resource, a structure of a control channel, and a data mapping method may be different.

Although the above-described embodiments have been described on the assumption of three types of services and three types of data, more types of services and corresponding data may exist, and even in this case, the contents of the present disclosure may be applied.

The terms physical channel and signal in the NR system may be used to describe the method and apparatus proposed in the present disclosure. However, the contents of the present disclosure may be applied not only to the NR system but also to other wireless communication systems.

4 is a diagram for explaining a process in which one transport block is divided into several code blocks and a CRC is added according to an embodiment.

Referring to FIG. 4 , a CRC 4-03 may be added to the last or first part of one transport block (TB) 4-01 to be transmitted in uplink or downlink. The CRC (4-03) may have 16 bits or 24 bits, a predetermined number of bits, or a variable number of bits according to channel conditions, and may be used to determine whether or not channel coding is successful. A block to which TB (4-01) and CRC (4-03) are added can be divided into several codeblocks (CB) (4-07, 4-09, 4-11, 4-13) ( 4-05). Here, the maximum size of the code block may be determined in advance, and in this case, the last code block 4-13 may have a smaller size than other code blocks 4-07, 4-09, and 4-11. However, this is only an example, and according to another example, 0, a random value, or 1 is inserted into the last code block 4-13, so that the last code block 4-13 and other code blocks 4-07, 4- 09, 4-11) can be matched to the same length.

CRCs (4-17, 4-19, 4-21, 4-23) may be added to the code blocks (4-07, 4-09, 4-11, 4-13), respectively (4-15 ). The CRC may have 16 bits or 24 bits or a predetermined number of bits, and may be used to determine whether channel coding is successful or not.

에 대해, CRC

는

를 gCRC24A(D)로 나누어 나머지가 0이 되는 값으로,

를 결정할 수 있다. 전술한 예에서는 일예로 CRC 길이 L을 24로 가정하여 설명하였지만 CRC 길이 L은 12, 16, 24, 32, 40, 48, 64 등 여러 가지 길이로 결정될 수 있다. TB (4-01) and a cyclic generator polynomial can be used to generate the CRC (4-03), and the cyclic generator polynomial can be defined in various ways. For example, assuming that cyclic generator polynomial gCRC24A(D) = D24 + D23 + D18 + D17 + D14 + D11 + D10 + D7 + D6 + D5 + D4 + D3 + D + 1 for 24-bit CRC, L = 24, TB data

About, CRC

Is

Divide by gCRC24A(D) so that the remainder becomes 0,

can be decided In the above example, the CRC length L has been described as an example of 24, but the CRC length L may be determined to have various lengths such as 12, 16, 24, 32, 40, 48, 64, and the like.

After CRC is added to TB through this process, it can be divided into N CBs (4-07, 4-09, 4-11, 4-13). CRC (4-17, 4-19, 4-21, 4-23) may be added to each of the divided CBs (4-07, 4-09, 4-11, 4-13) (4- 15). The CRC added to the CB may have a different length than when generating the CRC added to the TB, or a different cyclic generator polynomial may be used. However, the CRC (4-03) added to the TB and the CRCs (4-17, 4-19, 4-21, 4-23) added to the code block may be omitted depending on the type of channel code applied to the code block. have. For example, when an LDPC code, not a turbo code, is applied to a code block, CRCs 4-17, 4-19, 4-21, 4-23 to be inserted for each code block may be omitted.

However, even when LDPC is applied, CRCs 4-17, 4-19, 4-21, and 4-23 may be added to the code block as it is. Also, even when a polar code is used, a CRC may be added or omitted.

As described above in FIG. 4 , the maximum length of one code block is determined for the TB to be transmitted according to the type of channel coding applied, and the TB and CRC added to the TB according to the maximum length of the code block are converted into code blocks. Partitioning may be performed.

In the conventional LTE system, CRC for CB is added to the divided CB, and the data bits and CRC of the CB are encoded with a channel code, coded bits are determined, and each coded bit is promised in advance. As described above, the number of rate-matched bits may be determined.

5 is a diagram for explaining a method in which an outer code is used and transmitted according to an embodiment. 6 is a block diagram for explaining the structure of a communication system using an outer code according to an embodiment.

Referring to FIGS. 5 and 6 , a method of transmitting a signal using an outer code can be viewed.

In FIG. 5, after one transport block is divided into several code blocks, bits or symbols (5-04) at the same position in each code block are encoded with the second channel code to obtain parity bits or symbols (5-04). 06) can be generated (5-02). After that, CRCs may be added to each of the code blocks and the parity code blocks generated by the second channel code encoding (5-08, 5-10).

Whether to add the CRC may be determined according to the type of the channel code. For example, when the turbo code is used as the first channel code, CRC (5-08, 5-10) is added, but after that, each code block and parity code blocks may be encoded by the first channel code encoding. . In the present disclosure, as the first channel code, a convolutional code, an LDPC code, a turbo code, and a polar code may be used. However, this is only an example, and various channel codes may be applied to the present disclosure as the first channel code. In the present disclosure, as the second channel code, for example, a Reed-Solomon code, a BCH code, a raptor code, a parity bit generation code, and the like may be used. However, this is only an example, and various channel codes may be applied to the present disclosure as the second channel code.

Referring to FIG. 6( a ), when the outer code is not used, only the first channel coding encoder 6-01 and the first channel coding decoder 6-05 are used in the transceiver, respectively, and the second channel coding encoder and The second channel coding decoder may not be used. Even when the outer code is not used, the first channel coding encoder 6-01 and the first channel coding decoder 6-05 may be configured in the same way as when the outer code is used, which will be described later.

Referring to FIG. 6B , when the outer code is used, data to be transmitted may pass through the second channel coding encoder 6-09. The bits or symbols that have passed through the second channel coding encoder 6-09 may pass through the first channel coding encoder 6-11. When the channel-coded symbols are received by the receiver through the channel 6-13, the receiver sequentially performs the first channel coding decoder 6-15 and the second channel coding decoder 6-17 based on the received signal. can be operated with The first channel coding decoder 6-15 and the second channel coding decoder 6-17 perform operations corresponding to the first channel coding encoder 6-11 and the second channel coding encoder 6-09, respectively. can do.

7 is a diagram for explaining a method of generating one or more parity code blocks by applying a second channel code or an outer code to several code blocks divided from one transport block according to an embodiment.

As described above in FIG. 4 , one transport block may be divided into one or more code blocks. At this time, if only one code block is generated according to the size of the transport block, the CRC may not be added to the corresponding code block. When the outer code is applied to code blocks to be transmitted, parity code blocks 7-40 and 7-42 may be generated (7-24). When using the outer code, the parity code blocks (7-40, 7-42) may be located after the last code block (7-24). After the outer code, CRC (7-26, 7-28, 7-30, 7-32, 7-34, 7-36) can be added (7-38). Thereafter, each code block and parity code block may be encoded as a channel code together with a CRC.

The size of TB (ie, TBS) in the NR system can be calculated through the following steps.

_{Step 1: Calculate N RE} ', which is the number of REs allocated to PDSCH mapping in one PRB in the allocated resource.

로 계산될 수 있다. 여기에서,

는 12이며,

는 PDSCH에 할당된 OFDM 심볼 수를 나타낼 수 있다.

는 같은 CDM 그룹의 DMRS가 차지하는, 한 PRB내의 RE 수이다.

는 상위 시그널링으로 설정되는 한 PRB내의 오버헤드가 차지하는 RE 수이며, 0, 6, 12, 18 중 하나로 설정될 수 있다. 이 후, PDSCH에 할당된 총 RE 수 N_RE가 계산될 수 있다. N_RE는

로 계산되며, n_PRB는 단말에게 할당된 PRB 수를 나타낸다. N _RE ' is

can be calculated as From here,

is 12,

may indicate the number of OFDM symbols allocated to the PDSCH.

is the number of REs in one PRB occupied by DMRSs of the same CDM group.

is the number of REs occupied by an overhead in a PRB as long as it is set by higher signaling, and may be set to one of 0, 6, 12, and 18. Thereafter, the total number of REs allocated to the PDSCH N _RE may be calculated. N _RE is

, where n _PRB represents the number of PRBs allocated to the UE.

는

로 계산될 수 있다. 여기에서, R은 코드레이트이며, Q_m은 변조 오더 (modulation order)이며, 이 값의 정보는 제어정보에서 MCS 비트필드와 미리 약속된 표를 이용하여 전달될 수 있다. 또한, v는 할당된 레이어 수이다. 만약

이면, 하기의 단계 3을 통해 TBS가 계산될 수 있다. 이외에는 단계 4를 통해 TBS가 계산될 수 있다. Step 2: Number of Temporary Information Bits

Is

can be calculated as Here, R is a code rate, Q _m is a modulation order, and information on this value may be transmitted using an MCS bitfield and a pre-arranged table in the control information. Also, v is the number of allocated layers. if

, TBS can be calculated through the following step 3 . Otherwise, TBS may be calculated through step 4.

와

의 수식을 통해

가 계산될 수 있다. TBS는 하기 표 6에서

보다 작지 않은 값 중

에 가장 가까운 값으로 결정될 수 있다. Step 3:

Wow

through the formula of

can be calculated. TBS is shown in Table 6 below.

of values not less than

can be determined as the closest value to .

[Table 6]

와

의 수식을 통해

가 계산될 수 있다. TBS는

값과 하기 [pseudo-code 1]을 통해 결정될 수 있다.Step 4:

Wow

through the formula of

can be calculated. TBS

It can be determined through the value and the following [pseudo-code 1].

[Start Pseudo-code 1]

[End of Pseudo-code 1]

When one CB is input to the LDPC encoder in the NR system, parity bits may be added and output. In this case, the amount of parity bits may vary according to the LDCP base graph. A method of sending all parity bits generated by LDPC coding to a specific input is called full buffer rate matching (FBRM), and a method of limiting the number of transmitable parity bits is called LBRM (limited buffer rate matching). can do.

는

가 되며,

는

로 주어지며,

은 2/3으로 결정될 수 있다.

은 전술한 TBS를 구하는 방법에서, 해당 셀에서 단말이 지원하는 최대 레이어 수를 나타내고, TBS_LBRM을 구하기 위해서는 해당 셀에서 단말에게 설정된 최대 변조오더 또는 최대 변조오더가 설정되지 않았을 경우에는 64QAM이 사용된다고 가정되고, 코드레이트는 최대 코드레이트인 948/1024이 가정되며,

는

으로 가정되고

는

으로 가정될 수 있다.

는 하기의 표 7로 주어질 수 있다. When a resource is allocated for data transmission, the LDPC encoder output is made into a circular buffer, and the bits of the created buffer are repeatedly transmitted as much as the allocated resource, and the length of the circular buffer can be called _{N cb.} . If the number of all parity bits generated by LDPC coding is N, N _cb = N in the FBRM method. In the LBRM method,

Is

becomes,

Is

is given as

may be determined to be 2/3.

In the above-described method for obtaining TBS, indicates the maximum number of layers supported by _{the UE in the cell, and in order to obtain TBS LBRM} , the maximum modulation order or maximum modulation order set for the UE in the cell is not set. is assumed, and the code rate is assumed to be the maximum code rate of 948/1024,

Is

is assumed to be

Is

can be assumed.

can be given in Table 7 below.

[Table 7]

The maximum data rate supported by the UE in the NR system may be determined through Equation 1 below.

[Equation 1]

는 최대 레이어 수,

는 최대 변조 오더,

는 스케일링 지수,

는 부반송파 간격을 의미할 수 있다.

는 1, 0.8, 0.75, 0.4 중 하나의 값으로 단말이 보고할 수 있으며,

는 하기의 표 8로 주어질 수 있다. In Equation 1, J is the number of carriers bundled by frequency aggregation, Rmax = 948/1024,

is the maximum number of layers,

is the maximum modulation order,

is the scaling exponent,

may mean a subcarrier spacing.

can be reported by the terminal as one of 1, 0.8, 0.75, and 0.4,

can be given in Table 8 below.

[Table 8]

는 평균 OFDM 심볼 길이이며,

는

로 계산될 수 있고,

는 BW(j)에서 최대 RB 수이다.

는 오버헤드 값으로, FR1 (6 GHz 이하 대역)의 하향링크에서는 0.14, 상향링크에서는 0.18로 주어질 수 있으며, FR2 (6 GHz 초과 대역)의 하향링크에서는 0.08, 상향링크에서는 0.10로 주어질 수 있다. [수학식 1]을 통해 30 kHz 부반송파 간격에서 100 MHz 주파수 대역폭을 갖는 셀에서의 하향링크에서의 최대 데이터율은 하기의 표 9로 계산될 수 있다. In addition,

is the average OFDM symbol length,

Is

can be calculated as

is the maximum number of RBs in BW(j).

As an overhead value, 0.14 in the downlink of FR1 (band below 6 GHz) and 0.18 in the uplink, 0.08 in the downlink of FR2 (band above 6 GHz) and 0.10 in the uplink may be given. Through [Equation 1], the maximum data rate in the downlink in a cell having a 100 MHz frequency bandwidth at a 30 kHz subcarrier interval may be calculated in Table 9 below.

[Table 9]

On the other hand, the actual data rate that the terminal can measure in actual data transmission may be a value obtained by dividing the amount of data by the data transmission time. This may be a value obtained by dividing the sum of TBS in 1 TB transmission or TBS in 2 TB transmission by the TTI length. As an example, as the assumption obtained in Table 6, the maximum actual data rate in downlink in a cell having a 100 MHz frequency bandwidth at a 30 kHz subcarrier interval may be determined as shown in Table 10 below according to the number of allocated PDSCH symbols.

[Table 10]

The maximum data rate supported by the terminal can be confirmed through Table 9, and the actual data rate according to the allocated TBS can be confirmed through Table 10. In this case, there may be a case where the actual data rate is greater than the maximum data rate according to the scheduling information.

In a wireless communication system, particularly an NR system, a data rate that the terminal can support may be predetermined or calculated between the base station and the terminal. This may be calculated using the maximum frequency band supported by the terminal, the maximum modulation order, the maximum number of layers, and the like. However, the calculated data rate may be different from a value calculated from the size (TBS) and TTI length of a transport block (TB) used for actual data transmission.

Accordingly, the terminal may be allocated a TBS greater than a value corresponding to the data rate supported by the terminal. It may be necessary to minimize this case and define the operation of the terminal in this case. The following embodiment provides a method and apparatus for solving a case where the maximum data rate that the terminal can support and the actual data rate according to scheduling do not match. In the above, the maximum data rate may be a value determined based on the capability or capability of the terminal, and the actual data rate may be a value determined based on scheduling information at the moment data is transmitted.

In the embodiments described below, the base station is a subject that performs resource allocation of the terminal, and may be a base station supporting both V2X communication and general cellular communication, or a base station supporting only V2X communication. That is, the base station may mean a new generation Node B (gNB), an evolved Node B (eNB), or a road site unit (RSU), a base station (BS), a radio access unit, a base station controller, or a fixed station. The terminal is not only a general UE, a mobile station, but also a vehicle supporting vehicle-to-vehicular communication (vehicular-to-vehicular, V2V), vehicle-to-pedestrian communication (vehicular-to-pedestrian, V2P) supporting vehicle or pedestrian A handset (e.g. a smartphone), a vehicle that supports vehicle-to-network (V2N) communication, or a vehicle that supports vehicle-to-transport infrastructure (vehicular-to-infrastructure, V2I) communication; and It may be one of an RSU equipped with a terminal function, an RSU equipped with a base station function, or an RSU equipped with a part of a base station function and a part of a terminal function.

In the V2X environment, data may be transmitted from one terminal to a plurality of terminals, or data may be transmitted from one terminal to one terminal. Alternatively, data may be transmitted from the base station to a plurality of terminals. However, the present disclosure is not limited thereto, and may be applied to various cases.

In order for the terminal to transmit/receive in the sidelink, the terminal operates based on a resource pool already defined or set or preset between terminals. The resource pool may be a set of frequency and time domain resources that can be used for transmitting and receiving sidelink signals. That is, in order to transmit and receive a sidelink signal, transmission and reception of a sidelink signal must be performed in a predetermined frequency-time resource, and the resource is defined as a resource pool. The resource pool may be defined separately for transmission and reception, and may be defined and used in common for transmission and reception. In addition, terminals may set one or a plurality of resource pools and perform transmission/reception of a sidelink signal.

Configuration information about the resource pool used for sidelink transmission and reception and other configuration information for sidelink are pre-installed when the terminal is produced, configured from the current base station, or other configuration information prior to accessing the current base station. It may be pre-configured from the base station or from another network unit, or it may be a fixed value (fixed), provisioned from the network, or self-constructed by the terminal itself.

The sidelink control channel may be referred to as a physical sidelink control channel (PSCCH), and the sidelink shared channel or data channel may be referred to as a physical sidelink shared channel (PSSCH). In addition, a broadcast channel broadcast together with a synchronization signal may be referred to as a physical sidelink broadcast channel (PSBCH), and a channel for feedback transmission may be referred to as a physical sidelink feedback channel (PSFCH). However, PSCCH or PSSCH may be used for feedback transmission. Depending on the communication system, the above-described channels may be referred to as LTE-PSCCH, LTE-PSSCH, NR-PSCCH, NR-PSSCH, and the like. In the present disclosure, a sidelink may mean a link between terminals, and a Uu link may mean a link between a base station and a terminal.

Information transmitted in the sidelink includes sidelink control information (SCI), sidelink feedback control information (SFCI), sidelink channel state information (SCSI), and a transport channel. It may include a sidelink shared channel (SL-SCH).

The above-described information and transport channels may be mapped to physical channels as shown in Tables 11 and 12 below.

[Table 11]

[Table 12]

Alternatively, when SCSI is transmitted through PSFCH, transport channel-physical channel mapping as shown in Tables 13 and 14 below may be applied.

[Table 13]

[Table 14]

Alternatively, if SCSI is transmitted to a higher layer and is transmitted using, for example, MAC CE, higher layer signaling corresponds to SL-SCH, so it may be transmitted through PSSCH, and transmission as shown in Tables 15 and 16 below. Channel-physical channel mapping may be applied.

[Table 15]

[Table 16]

8A illustrates an example of groupcasting transmission in a wireless communication system according to various embodiments of the present disclosure.

Referring to FIG. 8A , a terminal 820 transmits common data to a plurality of terminals 821a, 821b, 821c, and 821d, that is, transmits data in a group casting method. The terminal 820 and the terminals 821a, 821b, 821c, and 821d may be devices that move like a vehicle. For group casting, at least one of separate control information (eg, sidelink control information (SCI)), a physical control channel (eg, physical sidelink control channel (PSCCH)), and data may be further transmitted.

8B illustrates an example of HARQ feedback transmission according to group casting in a wireless communication system according to various embodiments of the present disclosure.

Referring to FIG. 8B , the terminals 821a, 821b, 821c, and 821d that have received common data by group casting transmit information indicating success or failure of data reception to the terminal 820 that has transmitted the data. Information indicating success or failure of data reception may include HARQ-ACK feedback. Data transmission and feedback operations as shown in FIGS. 8A and 8B were performed based on group casting. However, according to another embodiment, the data transmission and feedback operations illustrated in FIGS. 8A and 8B may also be applied to unicast transmission.

9 illustrates an example of unicasting transmission in a wireless communication system according to various embodiments of the present disclosure.

Referring to FIG. 9 , a first terminal 920a transmits data to a second terminal 920b. As another example, the data transmission direction may be reversed (eg, transmitted from the second terminal 920b to the first terminal 920a). Except for the first terminal 920a and the second terminal 920b, other terminals 920c and 920d cannot receive data transmitted and received in a unicast manner between the first terminal 920a and the second terminal 920b. . Transmission and reception of data through unicast between the first terminal 920a and the second terminal 920b is mapped in a resource promised between the first terminal 920a and the second terminal 920b, or scrambling using a mutually promised value. Or, it may be transmitted using a preset value. Alternatively, control information related to data through unicast between the first terminal 920a and the second terminal 920b may be mapped in a mutually agreed manner. Alternatively, data transmission/reception through unicast between the first terminal 920a and the second terminal 920b may include an operation of confirming mutually unique IDs. The terminals may be devices that move like a vehicle. At least one of separate control information, a physical control channel, and data may be further transmitted for unicast.

10A illustrates an example of sidelink data transmission according to scheduling of a base station in a wireless communication system according to various embodiments of the present disclosure.

10A illustrates a mode 1 in which a terminal receiving scheduling information from a base station transmits sidelink data. Although the present disclosure refers to a method of performing sidelink communication based on scheduling information as mode 1, it may be referred to by other names. Referring to FIG. 10A , a terminal 1020a (hereinafter referred to as a 'transmitting terminal') that intends to transmit data in the sidelink receives scheduling information for sidelink communication from the base station 1010 . Upon receiving the scheduling information, the transmitting terminal 1020a transmits sidelink data to another terminal 1020b (hereinafter referred to as a 'receiving terminal') based on the scheduling information. Scheduling information for sidelink communication received from the base station is included in DCI, and the DCI may include at least one of the items shown in Table 17 below.

[Table 17]

Scheduling may be performed for one-time sidelink transmission, or may be performed for periodic transmission or semi-persistent scheduling (SPS) or configured grant transmission. The scheduling method may be distinguished by an indicator included in DCI or by an RNTI or ID value scrambled to a CRC added to DCI. DCI for sidelink transmission may further include a padding bit (eg, 0 bit) so as to have the same size as other DCI formats such as DCI for downlink scheduling or uplink scheduling.

The transmitting terminal 1020a receives DCI for sidelink scheduling from the base station 1010, transmits a PSCCH including sidelink scheduling information to the receiving terminal 1020b, and then transmits the PSSCH, which is data corresponding to the PSCCH. . The SCI, which is sidelink scheduling information transmitted by the terminal transmitted on the PSCCH, may include at least one of the items shown in Table 18 below.

[Table 18]

Control information including at least one of the items shown in Table 18 may be included in one SCI or two SCIs to be delivered to the receiving terminal. A method of being divided into two SCIs and transmitted may be referred to as a two-stage SCI.

10B illustrates an example of sidelink data transmission without scheduling of a base station in a wireless communication system according to various embodiments of the present disclosure. 10B illustrates a mode 2 in which the terminal transmits sidelink data without receiving scheduling information from the base station. Although the present disclosure refers to a method of performing sidelink communication without scheduling information as mode 2, it may be referred to by other names. The terminal 1020a desiring to transmit data in the sidelink may transmit the sidelink scheduling control information and the sidelink data to the receiving terminal 1020b by determining it by itself without scheduling from the base station. In this case, the SCI of the same format as the SCI used in the mode 1 sidelink communication may be used as the sidelink scheduling control information. For example, the scheduling control information may include at least one of the items shown in Table 18.

11A is a diagram illustrating an example of a channel structure of a slot used for sidelink communication in a wireless communication system according to various embodiments of the present disclosure. 11A illustrates physical channels mapped to slots for sidelink communication. Referring to FIG. 11A , the preamble 1101 is mapped before the start of the slot, that is, at the end of the previous slot. Thereafter, from the start of the slot, the PSCCH 1102 , the PSSCH 1103 , the gap 1104 , the physical sidelink feedback channel (PSFCH) 1105 , and the gap 1106 are mapped.

Before transmitting a signal in the corresponding slot, the transmitting terminal transmits a preamble 1101 signal in one or more symbols. The preamble may be used so that the receiving terminal can correctly perform automatic gain control (AGC) for adjusting the strength of the amplification when the receiving terminal amplifies the power of the received signal. In addition, the preamble may or may not be transmitted depending on whether the transmitting terminal has transmitted the previous slot. That is, when the transmitting terminal transmits a signal to the same terminal in the previous slot (eg, slot #n-1) of the corresponding slot (eg, slot #n), transmission of the preamble 1101 may be omitted. The preamble 1101 is a 'synchronization signal', a 'sidelink sync signal', a 'sidelink reference signal', a 'midamble', an 'initial signal', a 'wake-up signal' or the like. It may be referred to as another term having an equivalent technical meaning.

The PSCCH 1102 including control information may be transmitted using symbols transmitted at the beginning of the slot, and the PSSCH 1103 scheduled by the control information of the PSCCH 1102 may be transmitted. At least a part of SCI, which is control information, may be mapped to the PSCCH 1102 . Thereafter, there is a GAP 1104 and a PSFCH 1105 that is a physical channel for transmitting feedback information is mapped.

The UE may receive a preset position of a slot capable of transmitting the PSFCH. The preset reception may be predetermined in the process of creating a terminal, or may be transmitted when accessing a sidelink-related system, transmitted from a base station when accessing a base station, or received from another terminal.

Referring to FIG. 11A , the PSFCH 1105 is illustrated as being located in the last part of the slot. By securing a gap 1104, which is an empty time of a certain time, between the PSSCH 1103 and the PSFCH 1105, the terminal that has transmitted or received the PSSCH 1103 receives or prepares for transmitting the PSFCH 1105 (eg : Send/receive conversion). After the PSFCH 1105, there is a gap 1106 that is an empty period for a predetermined time.

A terminal desiring to transmit data from the sidelink resource pool first performs a step of finding a resource in order to determine from which resource of the sidelink to transmit data. This may be referred to as channel sensing, and the channel sensing may be to find in advance a resource for initial transmission and retransmission of specific data or a transport block (TB) or code block (CB). In the channel sensing process, resources found for initial transmission and retransmission may have different sizes in the frequency domain. That is, there may exist a case where only 1 subchannel or 10 PRBs can be used for initial transmission, and 4 subchannels or 40 PRBs can be used for retransmission.

In this case, the TB transmitted in subchannel 1 in the initial transmission and the TB transmitted in the retransmission may have to have the same size. Therefore, the UE may need a method of appropriately determining the size of the TB (TB size; TBS). The terminal that transmits the control information and data and the terminal that receives the control information may determine the size of the TB to be transmitted and received by using one of the following methods or a combination of one or more methods.

The TBS determination method for sidelink data transmission can be summarized as follows.

를 계산한다.

는

로 계산될 수 있다. 여기에서,

는 하나의 RB에 포함되는 부반송파 개수(예: 12),

는 PSSCH에 할당된 OFDM 심볼 개수,

는 같은 CDM(code division multiplexing) 그룹의 DMRS(demodulation reference signal)가 점유하는, 하나의 PRB 내의 RE 개수,

는 상위 시그널링에 의해 구성되는 하나의 한 PRB 내의 오버헤드가 점유하는 RE 개수(예: 0, 6, 12, 18 중 하나로 설정)를 의미한다. 이후, PSSCH에 할당된 총 RE 개수

가 계산될 수 있다.

는

로 계산된다. n_PRB는 단말에게 할당된 PRB 개수를 의미한다.

는 PSCCH가 매핑되는 RB의 수이고,

는 PSCCH에 할당된 OFDM 심볼 수일 수 있다. 상기에서는 PRB 수를 가지고 계산하는 일례가 기술되었으나, 이와 유사한 방법으로 서브채널의 수를 이용하여 계산되는 것일 수 있다.Step 1: The number of REs allocated to PSSCH mapping in one PRB in the allocated resource

to calculate

Is

can be calculated as From here,

is the number of subcarriers included in one RB (eg, 12),

is the number of OFDM symbols allocated to the PSSCH,

is the number of REs in one PRB occupied by a demodulation reference signal (DMRS) of the same code division multiplexing (CDM) group,

denotes the number of REs (eg, set to one of 0, 6, 12, or 18) occupied by overhead in one PRB configured by higher-order signaling. Thereafter, the total number of REs allocated to the PSSCH

can be calculated.

Is

is calculated as n _PRB means the number of PRBs allocated to the UE.

is the number of RBs to which the PSCCH is mapped,

may be the number of OFDM symbols allocated to the PSCCH. Although an example of calculating with the number of PRBs has been described above, it may be calculated using the number of subchannels in a similar way.

로 계산될 수 있다. 여기서, R은 부호화율(code rate), Qm은 변조 차수(modulation order), v는 할당된 레이어 개수를 의미한다. 부호화율 및 변조 차수는 제어 정보에 포함되는 MCS 필드와 미리 정의된 대응 관계를 이용하여 전달될 수 있다. 만약, N_info <=3824이면, 이하 단계 3에 따라, 그렇지 아니하면, 이하 단계 4에 따라 TBS가 계산될 수 있다. Step 2: The number of temporary information bits N _info is

can be calculated as Here, R denotes a code rate, Qm denotes a modulation order, and v denotes the number of allocated layers. The coding rate and the modulation order may be transmitted using an MCS field included in the control information and a predefined correspondence relationship. If N _info <=3824, the TBS may be calculated according to step 3 below, otherwise, according to step 4 below.

와

와 같이

가 계산될 수 있다. 이어, TBS는 [표 19]에서

보다 작지 않은 값 중

에 가장 가까운 값으로 결정될 수 있다. Step 3:

Wow

together with

can be calculated. Then, TBS in [Table 19]

of values not less than

can be determined as the closest value to .

와

에 따라

가 계산될 수 있다. 이어, TBS는

값과 [표 20]과 같은 수도-코드를 통해 결정될 수 있다.Step 4:

Wow

Depending on the

can be calculated. Then, TBS

It can be determined through values and pseudo-codes as shown in [Table 20].

[Table 19]

[Table 20]

의 수식에서 156 대신에 156보다 작은 값, 예를 들어 144와 같은 값이 사용될 수 있다.In the methods for determining TBS in sidelink data transmission and reception,

Instead of 156 in the formula of , a value less than 156, for example, a value such as 144 may be used.

로 결정될 수 있으며, 이 과정에서는

가 사용되지 않을 수 있다. 상기에서 PSSCH에 할당된 OFDM 심볼 수

는, 하기의 방법들 중에서 적어도 하나의 방법에 따라서 결정될 수 있다. or

can be determined, and in this process

may not be used. The number of OFDM symbols allocated to the PSSCH in the above

may be determined according to at least one of the following methods.

는 PSSCH가 전송되는 슬롯에서 PSSCH가 매핑되는 심볼 수이다. - Method A-1:

is the number of symbols to which the PSSCH is mapped in a slot in which the PSSCH is transmitted.

는 PSSCH가 전송되는 리소스풀에 설정된 슬롯들 중에서 사이드링크 PSSCH 전송에 사용할 수 있는 심볼 수 중 가장 큰 값으로 결정된다. 예를 들어,

는 해당 리소스풀에 매 2 슬롯 마다 PSFCH가 설정된다면, PSFCH가 없는 슬롯을 기준으로 결정된다. - Method A-2:

is determined as the largest value among the number of symbols usable for sidelink PSSCH transmission among slots configured in the resource pool through which the PSSCH is transmitted. E.g,

If PSFCH is configured for every 2 slots in the resource pool, it is determined based on a slot without PSFCH.

는 PSSCH가 전송되는 리소스풀에 설정된 슬롯들 중에서 사이드링크 PSSCH 전송에 사용할 수 있는 심볼 수 중 가장 작은 값으로 결정된다. 예를 들어,

는 해당 리소스풀에 매 2 슬롯 마다 PSFCH가 설정된다면, PSFCH가 있는 슬롯을 기준으로 결정된다.- Method A-3:

is determined as the smallest value among the number of symbols usable for sidelink PSSCH transmission among slots configured in the resource pool in which the PSSCH is transmitted. E.g,

If the PSFCH is configured every 2 slots in the resource pool, it is determined based on the slot in which the PSFCH is located.

는 PSSCH가 전송되는 리소스풀에 설정된 슬롯들 중에서 사이드링크 PSSCH 전송에 사용할 수 있는 심볼 수의 평균 값으로 결정된다. 예를 들어, 해당 리소스풀에 매 2 슬롯 마다 PSFCH가 설정된다면,

는 PSFCH가 있는 슬롯들과 없는 슬롯들에서 PSSCH에 사용할 수 있는 심볼 수의 평균으로 결정된다.- Method A-4:

is determined as an average value of the number of symbols usable for sidelink PSSCH transmission among slots configured in the resource pool in which the PSSCH is transmitted. For example, if PSFCH is configured every 2 slots in the resource pool,

is determined as the average of the number of symbols usable for the PSSCH in slots with and without PSFCH.

는 PSSCH가 전송되는 리소스풀에 설정된 슬롯들 중에서 사이드링크 PSSCH 전송에 사용할 수 있는 심볼 수의 평균의 ceiling (올림)으로 그 값이 결정된다.- Method A-5:

The value is determined as the ceiling (rounded up) of the average of the number of symbols usable for sidelink PSSCH transmission among the slots set in the resource pool in which the PSSCH is transmitted.

는 PSSCH가 전송되는 리소스풀에 설정된 슬롯들 중에서 사이드링크 PSSCH 전송에 사용할 수 있는 심볼 수의 평균의 flooring (내림)으로 그 값이 결정된다.- Method A-6:

The value is determined by flooring (down) of the average of the number of symbols usable for sidelink PSSCH transmission among the slots configured in the resource pool in which the PSSCH is transmitted.

는 PSSCH가 전송되는 리소스풀에 설정된 슬롯들 중에서 사이드링크 PSSCH 전송에 사용할 수 있는 심볼 수의 평균의 round (반올림)으로 그 값이 결정된다.- Method A-7:

The value is determined by the round (rounding) of the average of the number of symbols usable for sidelink PSSCH transmission among the slots set in the resource pool in which the PSSCH is transmitted.

을 결정하는 방법들은 사이드링크의 첫 번째 심볼이 포함되어서도 적용될 수 있을 것이다. 또한, gap 심볼로 정의된 심볼들이 포함되는 것도 적용될 수 있다. The above methods do not include the first symbol of a sidelink that can be used for AGC purposes or the like. Also, symbols defined as gap symbols are not included. However, since the above is only an example, the embodiment of the present disclosure is not limited thereto, and the number of OFDM symbols described above is not limited thereto.

Methods of determining ? may be applied even when the first symbol of the sidelink is included. In addition, the inclusion of symbols defined as gap symbols may also be applied.

결정 시에는 2nd SCI등이 매핑되는 영역 등이 고려되고, PSSCH에 할당된 OFDM 심볼 수 역시

결정 시 추가적으로 제외될 수 있다. 또한,

는 상위 시그널링에 의해 구성되는 하나의 PRB 내의 오버헤드가 점유하는 RE 개수를 의미한다. 이 값은 리소스풀에 (미리)설정되는 값일 수 있다.

값으로서 미리 설정될 수 있는 값들은, 종래 NR 시스템이 사용하는 0, 6, 12, 18 뿐만 아니라 더 큰 값이 적용될 수 있는데, 이는 2nd SCI를 고려한 것 때문일 수 있다. 예를 들면,

값은 0, 6, 12, 18, 24, 30, 36, 42 등 중에서 설정되거나 또는 0, 6, 12, 18, 36, 60, 84, 108 중에서 하나가 설정될 수 있다. In addition,

When determining, the area to which the 2nd SCI is mapped, etc. are considered, and the number of OFDM symbols allocated to the PSSCH is also

Additional exclusions may be made at the time of decision. In addition,

denotes the number of REs occupied by overhead in one PRB configured by higher-order signaling. This value may be a (pre)set value in the resource pool.

As values that can be preset as a value, larger values may be applied as well as 0, 6, 12, and 18 used by the conventional NR system, which may be due to consideration of the 2nd SCI. For example,

The value may be set among 0, 6, 12, 18, 24, 30, 36, 42, or the like, or one of 0, 6, 12, 18, 36, 60, 84, 108.

Hereinafter, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. In addition, in the description of 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 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. In the present invention, downlink (DL) is a wireless transmission path of a signal transmitted from a base station to a terminal, and uplink (UL) means a wireless transmission path of a signal transmitted from a terminal to a base station, sidelink (Sidelink; SL) refers to a radio path of a signal transmitted from a terminal to at least one other terminal. In addition, although an embodiment of the present disclosure will be described below by taking the NR 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.

In the present disclosure, the terms of a conventional physical channel and a signal may be used interchangeably with data or a control signal. For example, the PDSCH is a physical channel through which data is transmitted, but in the present disclosure, the PDSCH may be referred to as data. Also, for example, the PSSCH is a physical channel through which data is transmitted, but in the present disclosure, the PSSCH may be referred to as data.

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

In the present disclosure, a peak data rate, a max data rate, a maximum data rate, etc. may be mixed and used.

[First embodiment]

According to an embodiment, the maximum data rate supported by the terminal may vary depending on the counterpart with which the terminal communicates. That is, the maximum data rate supported by the terminal may be different depending on whether the terminal transmits/receives data to/from the base station or transmits/receives data to/from another terminal. The maximum data rate supported by the terminal may be determined through [Equation 1], and at least one of the parameters in [Equation 1] may have a different value depending on the communication partner of the terminal. That is, it may vary depending on whether the terminal performs a downlink or uplink operation, or a sidelink operation.

는 단말이 기지국과 데이터를 송수신하는 경우는 FR1 (6 GHz 이하 대역)의 하향링크에서는 0.14, 상향링크에서는 0.18로 주어질 수 있으며, FR2 (6 GHz 초과 대역)의 하향링크에서는 0.08, 상향링크에서는 0.10로 결정될 수 있다. 반면 단말이 다른 단말과 데이터를 송수신하는 경우, 즉 사이드링크에서는 FR1(6 GHz 이하 대역)에서는 OH_sub6, FR2(6 GHz 초과 대역)에서는 OH_above6와 같은 값을 가질 수 있다. 상기 OH_sub6의 값은 PSFCH(Physical Sidelink Feedback Channel)의 설정과 관계 없이 특정 값 이상을 가질 수 있다. 예를 들어 상기 OH_sub6의 값은 2/12보다 큰 값을 가질 수 있다. 상기에서 OH_sub6와 OH_above6는 예를 들어, 하기와 같은 방법으로 결정될 수 있다.For example, an overhead value representing

can be given as 0.14 in the downlink of FR1 (band below 6 GHz) and 0.18 in the uplink when the terminal transmits and receives data with the base station, and 0.08 in the downlink of FR2 (band above 6 GHz) and 0.10 in the uplink can be determined as On the other hand there is the terminal may have the same value as in the case of transmitting and receiving data with other terminals, that is, the side links in the FR1 (6 GHz or less bandwidth), the OH _sub6, FR2 (6 GHz band than) OH _above6. The _{value of OH sub6} may have a specific value or more regardless of the configuration of a Physical Sidelink Feedback Channel (PSFCH). For example, the _{value of OH sub6} may have a value greater than 2/12. In the above, OH _sub6 and OH _above6 may be determined, for example, by the following method.

- Method 1: OH _sub6 is set to 0.21, OH _{above6 is} also set to 0.21.

,

,

에 의해 결정된 것일 수 있다. 구체적으로 OH_sub6와 OH_above6는 각각 해당 캐리어의 리소스풀 설정에서, PSFCH 자원이 설정된 슬롯의 비율에 따라

,

,

로 결정될 수 있으며 이는 PSFCH 설정에서 sl-PSFCH-Period 파라미터에 의해 결정될 수 있다. 상기 PSFCH 자원의 주기인 sl-PSFCH-Period를 N이라고 할 경우, OH_sub6와 OH_above6는 각각 해당 캐리어의 리소스풀 설정에 따라

일 수 있다. - Method 2: OH _sub6 and OH _above6 are determined according to the ratio of slots in which the PSFCH resource is configured or the period of the PSFCH resource in the resource pool configuration of the corresponding carrier, respectively. For example, when the PSFCH is configured for every slot, it can be determined as 0.42, when the PSFCH is configured by one slot for every two slots, it can be determined as 0.32, and when the PSFCH is configured with one slot for every 4 slots, it can be determined as 0.26. Each of these

,

,

may be determined by Specifically, OH _sub6 and OH _above6 are each according to the ratio of slots in which PSFCH resources are set in the resource pool setting of the corresponding carrier.

,

,

may be determined by the sl-PSFCH-Period parameter in the PSFCH configuration. When sl-PSFCH-Period, which is the period of the PSFCH resource, is N, OH _sub6 and OH _above6 are each according to the resource pool setting of the corresponding carrier.

can be

는 단말이 기지국과 데이터를 송수신하는 경우는 FR1 (6 GHz 이하 대역)의 하향링크에서는 0.14, 상향링크에서는 0.18로 주어질 수 있으며, FR2 (6 GHz 초과 대역)의 하향링크에서는 0.08, 상향링크에서는 0.10로 결정될 수 있다. 반면 단말이 다른 단말과 송수신하는 경우 즉 사이드링크에서는 OH^(j) 값은 상위 레이어의 설정 값에 의해 결정될 수 있다. 예를 들어, 적어도 한 개 이상의 사이드링크(sidelink) 리소스 풀(resource pool)이 PSSCH(Physical Sidelink Shared Channel)의 송수신을 위하여 단말에 설정될 수 있는데, 이 중 가장 큰 밴드위스(bandwidth)를 가지는 리소스 풀의 파라미터에 의해 OH^(j) 값이 결정될 수 있다.For another example, an overhead value representing

can be given as 0.14 in the downlink of FR1 (band below 6 GHz) and 0.18 in the uplink when the terminal transmits and receives data with the base station, and 0.08 in the downlink of FR2 (band above 6 GHz) and 0.10 in the uplink can be determined as On the other hand, when the terminal transmits/receives with another terminal, that is, in the sidelink, the OH ^(j) value may be determined by a setting value of a higher layer. For example, at least one sidelink (sidelink) resource pool (resource pool) may be configured in the terminal for transmission and reception of a PSSCH (Physical Sidelink Shared Channel), among which the resource having the largest bandwidth (bandwidth) ^{The OH (j)} value can be determined by the parameters of the pool.

Including the above method, for example, the maximum data rate may be determined as follows.

For NR, the approximate data rate for a given number of aggregated carriers in a band or band combination is computed as follows.

wherein

J is the number of aggregated component carriers in a band or band combination

R _max = 948/1024

For the j-th CC,

is the maximum number of supported layers given by higher layer parameter maxNumberMIMO-LayersPDSCH for downlink and maximum of higher layer parameters maxNumberMIMO-LayersCB-PUSCH and maxNumberMIMO-LayersNonCB-PUSCH for uplink.

is the maximum number of supported layers given by higher layer parameter maxNumberMIMO-LayersPDSCH for downlink and maximum of higher layer parameters maxNumberMIMO-LayersCB-PUSCH and maxNumberMIMO-LayersNonCB-PUSCH for uplink.

is the maximum supported modulation order given by higher layer parameter supportedModulationOrderDL for downlink and higher layer parameter supportedModulationOrderUL for uplink.

is the maximum supported modulation order given by higher layer parameter supportedModulationOrderDL for downlink and higher layer parameter supportedModulationOrderUL for uplink.

is the scaling factor given by higher layer parameter scalingFactor and can take the values 1, 0.8, 0.75, and 0.4.

is the scaling factor given by higher layer parameter scalingFactor and can take the values 1, 0.8, 0.75, and 0.4.

is the numerology (as defined in TS 38.211 [6])

is the numerology (as defined in TS 38.211 [6])

is the average OFDM symbol duration in a subframe for numerology

, i.e.

. Note that normal cyclic prefix is assumed.

is the average OFDM symbol duration in a subframe for numerology

, ie

. Note that normal cyclic prefix is assumed.

is the maximum RB allocation in bandwidth

with numerology

, as defined in 5.3 TS 38.101-1 [2] and 5.3 TS 38.101-2 [3], where

is the UE supported maximum bandwidth in the given band or band combination.

is the maximum RB allocation in bandwidth

with numerology

, as defined in 5.3 TS 38.101-1 [2] and 5.3 TS 38.101-2 [3], where

is the UE supported maximum bandwidth in the given band or band combination.

is the overhead and takes the following values

is the overhead and takes the following values

0.14, for frequency range FR1 for DL

0.18, for frequency range FR2 for DL

0.08, for frequency range FR1 for UL

0.10, for frequency range FR2 for UL

0.21, for frequency range FR1 for SL

0.21, for frequency range FR2 for SL

NOTE: Only one of the UL or SUL carriers (the one with the higher data rate) is counted for a cell operating SUL.

[Example 1-1]

According to an embodiment, the maximum data rate supported by the terminal may vary depending on the counterpart with which the terminal communicates. That is, the maximum data rate supported by the terminal may be different depending on whether the terminal transmits/receives data to/from the base station or transmits/receives data to/from another terminal. The maximum data rate supported by the terminal may be determined through the following process.

For NR, the approximate data rate for a given number of aggregated carriers in a band or band combination is computed as follows.

wherein

J is the number of aggregated component carriers in a band or band combination

R _max = 948/1024

For the j-th CC,

is the maximum number of supported layers given by higher layer parameter maxNumberMIMO-LayersPDSCH for downlink and maximum of higher layer parameters maxNumberMIMO-LayersCB-PUSCH, maxNumberMIMO-LayersNonCB-PUSCH for uplink, maxNumberMIMO-LayersCB-PSSCH-TX for sidelink transmission, and maxNumberMIMO-LayersCB-PSSCH-RX for sidelink reception

is the maximum number of supported layers given by higher layer parameter maxNumberMIMO-LayersPDSCH for downlink and maximum of higher layer parameters maxNumberMIMO-LayersCB-PUSCH , maxNumberMIMO-LayersNonCB-PUSCH for uplink, maxNumberMIMO-LayersCB-PSSCH-TX for sidelink transmission, and maxNumberMIMO -LayersCB-PSSCH-RX for sidelink reception

is the maximum supported modulation order given by higher layer parameter supportedModulationOrderDL for downlink,higher layer parameter supportedModulationOrderUL for uplink, higher layer parameter supportedModulationOrderSLTX for sidelink transmission, and higher layer parameter supportedModulationOrderSLRX for sidelink reception.

is the maximum supported modulation order given by higher layer parameter supportedModulationOrderDL for downlink,higher layer parameter supportedModulationOrderUL for uplink, higher layer parameter supportedModulationOrderSLTX for sidelink transmission, and higher layer parameter supportedModulationOrderSLRX for sidelink reception.

is the scaling factor given by higher layer parameter scalingFactor and can take the values 1, 0.8, 0.75, and 0.4.

is the scaling factor given by higher layer parameter scalingFactor and can take the values 1, 0.8, 0.75, and 0.4.

is the numerology (as defined in TS 38.211 [6])

is the numerology (as defined in TS 38.211 [6])

is the average OFDM symbol duration in a subframe for numerology

, i.e.

. Note that normal cyclic prefix is assumed.

is the average OFDM symbol duration in a subframe for numerology

, ie

. Note that normal cyclic prefix is assumed.

is the maximum RB allocation in bandwidth

with numerology

, as defined in 5.3 TS 38.101-1 [2] and 5.3 TS 38.101-2 [3], where

is the UE supported maximum bandwidth in the given band or band combination.

is the maximum RB allocation in bandwidth

with numerology

, as defined in 5.3 TS 38.101-1 [2] and 5.3 TS 38.101-2 [3], where

is the UE supported maximum bandwidth in the given band or band combination.

is the overhead and takes the following values

is the overhead and takes the following values

0.14, for frequency range FR1 for DL

0.18, for frequency range FR2 for DL

0.08, for frequency range FR1 for UL

0.10, for frequency range FR2 for UL

0.21, for frequency range FR1 for SL-TX

0.21, for frequency range FR2 for SL-TX

0.21, for frequency range FR1 for SL-RX

0.21, for frequency range FR2 for SL-RX

NOTE: Only one of the UL or SUL carriers (the one with the higher data rate) is counted for a cell operating SUL.

In the above, maxNumberMIMO-LayersPDSCH means the maximum number of layers supportable in PDSCH reception in the downlink, and maxNumberMIMO-LayersNonCB-PUSCH means the maximum number of layers supportable in PUSCH transmission in the uplink. And, in the above, maxNumberMIMO-LayersCB-PSSCH-TX and maxNumberMIMO-LayersCB-PSSCH-RX mean the maximum number of layers supportable in PSSCH transmission and reception in the sidelink, respectively.

In the above, supportedModulationOrderDL means the maximum modulation order supportable in PDSCH reception in the downlink, and supportedModulationOrderUL means the maximum modulation order supportable in PUSCH transmission in the uplink. And, in the above, supportedModulationOrderSLTX and supportedModulationOrderSLRX mean the maximum modulation order supportable for transmission and reception in the sidelink, respectively. The terminal and the base station may use at least one of parameters associated with each link in determining the respective maximum data rates in the downlink, uplink, and sidelink. For example, in order to determine the maximum data rate of the sidelink, a parameter defined for the sidelink may be used. If a separate parameter is not defined for each link, an existing parameter can be used. For example, a sidelink transmitting terminal may use an existing uplink parameter, and a sidelink receiving terminal may use an existing downlink parameter.

값, PSSCH 송신에서 지원 가능한 최대 레이어 수를 의미하는 maxNumberMIMO-LayersCB-PSSCH-TX 파라미터에 의해 설정된 값, PSSCH 송신에서 지원 가능한 최대 modulation order를 의미하는 supportedModulationOrderSLTX 파라미터에 의해 설정된 값 들 중 적어도 한 개 이상을 사용하여 최대 데이터율을 계산할 수 있다.예를 들어, 단말은 사이드링크에서의 최대 수신 데이터율을 결정하는 과정에서 사이드링크에서 사용하는 주파수 대역에서 수신에 해당하는

값, PSSCH 수신에서 지원 가능한 최대 레이어 수를 의미하는 maxNumberMIMO-LayersCB-PSSCH-RX 파라미터에 의해 설정된 값, PSSCH 수신에서 지원 가능한 최대 modulation order를 의미하는 supportedModulationOrderSLRX 파라미터에 의해 설정된 값 들 중 적어도 한 개 이상을 사용하여 최대 데이터율을 계산할 수 있다.For example, in the process of determining the maximum transmission data rate in the sidelink, the terminal corresponds to transmission in a frequency band used in the sidelink.

value, the value set by the maxNumberMIMO-LayersCB-PSSCH-TX parameter meaning the maximum number of layers supportable in PSSCH transmission, and at least one or more of the values set by the supportedModulationOrderSLTX parameter meaning the maximum modulation order supportable in PSSCH transmission The maximum data rate can be calculated using the

At least one or more of the value, the value set by the maxNumberMIMO-LayersCB-PSSCH-RX parameter meaning the maximum number of layers supported in PSSCH reception, and the supportedModulationOrderSLRX parameter meaning the maximum modulation order supportable in PSSCH reception. can be used to calculate the maximum data rate.

등과 같은 다른 파라미터들이 통신 상대에 따라 별도의 값을 갖지 않는다는 것을 의미하지 않는다. 다른 파라미터들이 단말의 통신 상대에 따라 별도의 값을 가지는 경우, 위와 같은 방법이 다른 파라미터들에도 적용될 수 있다.Above, an example in which the maximum number of layers, the maximum modulation order, ^{and the value of OH (j)} have separate values according to the communication counterpart (down/uplink vs. sidelink) of the terminal has been described, but this is only an example, and f ^{(j) )} ,

It does not mean that other parameters such as etc. do not have separate values according to the communication counterpart. When other parameters have different values according to the communication counterpart of the terminal, the above method may be applied to other parameters.

[Embodiment 1-2]

According to an embodiment of the present disclosure, the maximum data rate supported by the terminal may vary depending on the counterpart with which the terminal communicates. That is, the maximum data rate supported by the terminal may be different depending on whether the terminal transmits/receives data to/from the base station or transmits/receives data to/from another terminal. The maximum data rate supported by the terminal may be determined through the following process.

For NR, the approximate data rate for a given number of aggregated carriers in a band or band combination is computed as follows.

wherein

J is the number of aggregated component carriers in a band or band combination. For NR sidelink, J=1.

R _max = 948/1024

For the j-th CC,

is the maximum number of supported layers given by higher layer parameter maxNumberMIMO-LayersPDSCH for downlink and maximum of higher layer parameters maxNumberMIMO-LayersCB-PUSCH, maxNumberMIMO-LayersNonCB-PUSCH for uplink, maxNumberMIMO-LayersCB-PSSCH-TX for sidelink transmission, and maxNumberMIMO-LayersCB-PSSCH-RX for sidelink reception

is the maximum number of supported layers given by higher layer parametermaxNumberMIMO-LayersPDSCHfor downlink and maximum of higher layer parametersmaxNumberMIMO-LayersCB-PUSCH,maxNumberMIMO-LayersNonCB-PUSCHfor uplink,maxNumberMIMO-LayersCB-PSSCH-TX for sidelink transmission, andmaxNumberMIMO-LayersCB-PSSCH-RX for sidelink reception

is the maximum supported modulation order given by higher layer parameter supportedModulationOrderDL for downlink,higher layer parameter supportedModulationOrderUL for uplink, higher layer parameter supportedModulationOrderSLTX for sidelink transmission, and higher layer parameter supportedModulationOrderSLRX for sidelink reception.

is the maximum supported modulation order given by higher layer parameter supportedModulationOrderDL for downlink,higher layer parameter supportedModulationOrderUL for uplink, higher layer parameter supportedModulationOrderSLTX for sidelink transmission, and higher layer parameter supportedModulationOrderSLRX for sidelink reception.

is the scaling factor given by higher layer parameter scalingFactor and can take the values 1, 0.8, 0.75, and 0.4. For NR sidelink,

is 1.

is the scaling factor given by higher layer parameter scalingFactor and can take the values 1, 0.8, 0.75, and 0.4. For NR sidelink,

is 1.

is the numerology (as defined in TS 38.211 [6])

is the numerology (as defined in TS 38.211 [6])

is the average OFDM symbol duration in a subframe for numerology

, i.e.

. Note that normal cyclic prefix is assumed.

is the average OFDM symbol duration in a subframe for numerology

, ie

. Note that normal cyclic prefix is assumed.

is the maximum RB allocation in bandwidth

with numerology

, as defined in 5.3 TS 38.101-1 [2] and 5.3 TS 38.101-2 [3], where

is the UE supported maximum bandwidth in the given band or band combination.

is the maximum RB allocation in bandwidth

with numerology

, as defined in 5.3 TS 38.101-1 [2] and 5.3 TS 38.101-2 [3], where

is the UE supported maximum bandwidth in the given band or band combination.

is the overhead and takes the following values

is the overhead and takes the following values

0.14, for frequency range FR1 for DL

0.18, for frequency range FR2 for DL

0.08, for frequency range FR1 for UL

0.10, for frequency range FR2 for UL

0.21, for frequency range FR1 for SL-TX

0.21, for frequency range FR2 for SL-TX

0.21, for frequency range FR1 for SL-RX

0.21, for frequency range FR2 for SL-RX

NOTE: Only one of the UL or SUL carriers (the one with the higher data rate) is counted for a cell operating SUL.

In the above, J may be the number of carriers that have become carrier aggregation (CA). Since CA is not supported in the sidelink, J=1 may be set. If CA is also supported in the sidelink, J is determined as the number of carriers supported as CA in the sidelink. For example, considering that CA is not supported in the sidelink, the data rate may be determined according to the following equation. However, the formula below is not limited to the application to sidelinks.

는 스케일링 지수를 의미하며,

의 값은 단말이 통신하는 상대에 따라 다를 수 있다. 단말이 기지국과 데이터를 송수신하는 경우 사용하는

의 값은 상위 레이어 시그널링을 통해 설정될 수 있고, 다른 단말과 데이터를 송수신하는 경우(사이드링크의 경우) 사용하는

의 값은 특정 값으로(일례로 1, 단 본 실시예는 이에 제한되지 않는다) 미리 정의되거나, 또는 상위 레이어 시그널링을 통해 설정될 수 있다. 일례로 사이드링크에서 CA가 적용되지 않고 f는 항상 1인 경우를 생각하면 아래와 같은 수식에 따라 data rate이 결정되는 것으로 적용될 수 있을 것이다. 단 아래 수식은 사이드링크에 대한 적용에 제한되지 않는다. from above

is the scaling exponent,

The value of may be different depending on the counterpart with which the terminal communicates. Used when the terminal transmits and receives data to and from the base station

The value of can be set through higher layer signaling, and is used when transmitting and receiving data with other terminals (in the case of sidelink).

The value of may be predefined as a specific value (for example, 1, but the present embodiment is not limited thereto) or may be set through higher layer signaling. For example, considering the case where CA is not applied in the sidelink and f is always 1, the data rate may be determined according to the following equation. However, the formula below is not limited to the application to sidelinks.

In the above, maxNumberMIMO-LayersPDSCH means the maximum number of layers supportable in PDSCH reception in the downlink, and maxNumberMIMO-LayersNonCB-PUSCH means the maximum number of layers supportable in PUSCH transmission in the uplink. And, in the above, maxNumberMIMO-LayersCB-PSSCH-TX and maxNumberMIMO-LayersCB-PSSCH-RX mean the maximum number of layers supportable in PSSCH transmission and reception in the sidelink, respectively.

In the above, supportedModulationOrderDL means the maximum modulation order supportable in PDSCH reception in the downlink, and supportedModulationOrderUL means the maximum modulation order supportable in PUSCH transmission in the uplink. And, in the above, supportedModulationOrderSLTX and supportedModulationOrderSLRX mean the maximum modulation order supportable in transmission and reception in the sidelink, respectively. The terminal and the base station may use at least one of parameters associated with each link in determining the respective maximum data rates in the downlink, uplink, and sidelink. For example, in order to determine the maximum data rate of the sidelink, one or more parameters defined for the sidelink may be used. When a separate parameter for each link is not defined, an existing parameter (or a parameter defined for another link) may be used. For example, a sidelink transmitting terminal may use a parameter for an existing uplink, and a sidelink receiving terminal may use a parameter for an existing downlink.

는 단말이 256QAM을 지원하는지 여부에 따라 결정될 수 있다. 즉, 단말이 사이드링크 송신시 256QAM이 지원되지 않으면 64QAM까지 지원하므로 사이드링크 송신의 최대 데이터율 계산에서

은 6으로 결정되고, 256QAM이 지원되면 사이드링크 송신의 최대 데이터율 계산에서

은 8로 결정될 수 있다. 본 발명에서 256QAM을 지원한다는 것은 256QAM용 MCS table을 사용할 수 있다는 의미일 수 있다. 이러한 256QAM 지원 여부는 기지국으로부터의 상위 계층 시그널링 또는 단말간의 상위 계층 시그널링으로 결정될 수 있다. 일례로 256QAM용 MCS 테이블이 사용된다고 상위 계층 시그널링으로 설정되거나, 또는 256QAM MCS 테이블이 사용된다고 미리 정의된 경우 단말은 256QAM이 지원된다고 판단할 수 있다.on the side link

may be determined depending on whether the terminal supports 256QAM. That is, if the terminal does not support 256QAM during sidelink transmission, it supports up to 64QAM, so in the calculation of the maximum data rate of sidelink transmission,

is determined to be 6, and if 256QAM is supported, in the calculation of the maximum data rate of sidelink transmission,

may be determined to be 8. Supporting 256QAM in the present invention may mean that an MCS table for 256QAM can be used. Whether to support such 256QAM may be determined by higher layer signaling from the base station or higher layer signaling between terminals. For example, when the upper layer signaling is configured that the MCS table for 256QAM is used, or it is predefined that the 256QAM MCS table is used, the UE may determine that 256QAM is supported.

는 사이드링크 BWP내에 설정된 리소스풀에서 설정되거나 사용되도록 미리 설정된 MCS 테이블에 따라 결정될 수도 있을 것이다. 예를 들어, 특정 단말에게 사이드링크 BWP 내에 설정된 리소스풀 중 적어도 하나의 리소스풀에 256QAM용 MCS 테이블이 사용될 수 있도록 설정된 경우

은 8로 결정되고, 이외의 경우에는

은 6으로 결정될 수 있다. In another embodiment, in the sidelink

may be determined according to the MCS table set in advance to be set or used in the resource pool set in the sidelink BWP. For example, when the MCS table for 256QAM is set to be used for at least one resource pool among the resource pools set in the sidelink BWP for a specific terminal

is determined to be 8, otherwise

may be determined to be 6.

값, PSSCH 송신에서 지원 가능한 최대 레이어 수를 의미하는 maxNumberMIMO-LayersCB-PSSCH-TX 파라미터에 의해 설정된 값, PSSCH 송신에서 지원 가능한 최대 modulation order를 의미하는 supportedModulationOrderSLTX 파라미터에 의해 설정된 값 들 중 적어도 한 개 이상을 사용하여 최대 데이터율을 계산할 수 있다. 예를 들어, 단말은 사이드링크에서의 최대 수신 데이터율을 결정하는 과정에서 사이드링크에서 사용하는 주파수 대역에서 수신에 해당하는

값, PSSCH 수신에서 지원 가능한 최대 레이어 수를 의미하는 maxNumberMIMO-LayersCB-PSSCH-RX 파라미터에 의해 설정된 값, PSSCH 수신에서 지원 가능한 최대 modulation order를 의미하는 supportedModulationOrderSLRX 파라미터에 의해 설정된 값 들 중 적어도 한 개 이상을 사용하여 최대 데이터율을 계산할 수 있다.For example, in the process of determining the maximum transmission data rate in the sidelink, the terminal corresponds to transmission in a frequency band used in the sidelink.

value, the value set by the maxNumberMIMO-LayersCB-PSSCH-TX parameter meaning the maximum number of layers supportable in PSSCH transmission, and at least one or more of the values set by the supportedModulationOrderSLTX parameter meaning the maximum modulation order supportable in PSSCH transmission can be used to calculate the maximum data rate. For example, in the process of determining the maximum reception data rate in the sidelink, the terminal corresponds to reception in a frequency band used in the sidelink.

At least one or more of the value, the value set by the maxNumberMIMO-LayersCB-PSSCH-RX parameter meaning the maximum number of layers supported in PSSCH reception, and the supportedModulationOrderSLRX parameter meaning the maximum modulation order supportable in PSSCH reception. can be used to calculate the maximum data rate.

등과 같은 다른 파라미터들이 통신 상대에 따라 별도의 값을 갖지 않는다는 것을 의미하지 않는다. 다른 파라미터들이 단말의 통신 상대에 따라 별도의 값을 가지는 경우, 위와 같은 방법이 다른 파라미터들에도 적용될 수 있다.Above, an example has been described in which the maximum number of layers, the maximum modulation order, ^{and the value of OH (j)} have separate values according to the communication counterpart of the terminal (down or / and uplink vs. sidelink), but this is only an example, f ^(j) ,

It does not mean that other parameters such as etc. do not have separate values according to the communication counterpart. When other parameters have different values according to the communication counterpart of the terminal, the above method may be applied to other parameters.

[Example 1-3]

According to an embodiment of the present disclosure, the maximum data rate supported by the terminal may vary depending on the counterpart with which the terminal communicates. That is, the maximum data rate supported by the terminal may be different depending on whether the terminal transmits/receives data to/from the base station or transmits/receives data to/from another terminal. The maximum data rate supported by the terminal may be determined through the following process. In this embodiment, the maximum data rate in the sidelink may be determined according to the configured resource pool configuration, and may be determined according to the configured number of resource pools.

For NR, the approximate data rate for a given number of aggregated carriers in a band or band combination is computed as follows.

wherein

J is the number of aggregated component carriers in a band or band combination. For NR sidelink, J is the number of resource pools (pre-)configured to the UE.

R _max = 948/1024

For the j-th CC, (in case of sidelink, for the j-th resource pool),

is the maximum number of supported layers given by higher layer parameter maxNumberMIMO-LayersPDSCH for downlink and maximum of higher layer parameters maxNumberMIMO-LayersCB-PUSCH, maxNumberMIMO-LayersNonCB-PUSCH for uplink, maxNumberMIMO-LayersCB-PSSCH-TX for sidelink transmission, and maxNumberMIMO-LayersCB-PSSCH-RX for sidelink reception

is the maximum number of supported layers given by higher layer parametermaxNumberMIMO-LayersPDSCHfor downlink and maximum of higher layer parametersmaxNumberMIMO-LayersCB-PUSCH,maxNumberMIMO-LayersNonCB-PUSCHfor uplink,maxNumberMIMO-LayersCB-PSSCH-TX for sidelink transmission, andmaxNumberMIMO-LayersCB-PSSCH-RX for sidelink reception

is the maximum supported modulation order given by higher layer parameter supportedModulationOrderDL for downlink,higher layer parameter supportedModulationOrderUL for uplink, higher layer parameter supportedModulationOrderSLTX for sidelink transmission, and higher layer parameter supportedModulationOrderSLRX for sidelink reception.

is the maximum supported modulation order given by higher layer parameter supportedModulationOrderDL for downlink,higher layer parameter supportedModulationOrderUL for uplink, higher layer parameter supportedModulationOrderSLTX for sidelink transmission, and higher layer parameter supportedModulationOrderSLRX for sidelink reception.

is the scaling factor given by higher layer parameter scalingFactor and can take the values 1, 0.8, 0.75, and 0.4.

is the scaling factor given by higher layer parameter scalingFactor and can take the values 1, 0.8, 0.75, and 0.4.

is the numerology (as defined in TS 38.211 [6])

is the numerology (as defined in TS 38.211 [6])

is the average OFDM symbol duration in a subframe for numerology

, i.e.

. Note that normal cyclic prefix is assumed.

is the average OFDM symbol duration in a subframe for numerology

, ie

. Note that normal cyclic prefix is assumed.

is the maximum RB allocation in bandwidth

with numerology

, as defined in 5.3 TS 38.101-1 [2] and 5.3 TS 38.101-2 [3], where

is the UE supported maximum bandwidth in the given band or band combination.

is the maximum RB allocation in bandwidth

with numerology

, as defined in 5.3 TS 38.101-1 [2] and 5.3 TS 38.101-2 [3], where

is the UE supported maximum bandwidth in the given band or band combination.

is the overhead and takes the following values

is the overhead and takes the following values

0.14, for frequency range FR1 for DL

0.18, for frequency range FR2 for DL

0.08, for frequency range FR1 for UL

0.10, for frequency range FR2 for UL

0.21, for frequency range FR1 for SL-TX

0.21, for frequency range FR2 for SL-TX

0.21, for frequency range FR1 for SL-RX

0.21, for frequency range FR2 for SL-RX

NOTE: Only one of the UL or SUL carriers (the one with the higher data rate) is counted for a cell operating SUL.

In the above, J may be the number of carriers that have become carrier aggregation (CA). In the sidelink, J may be the number of resource pools configured for the terminal.

In the above, maxNumberMIMO-LayersPDSCH means the maximum number of layers supportable in PDSCH reception in the downlink, and maxNumberMIMO-LayersNonCB-PUSCH means the maximum number of layers supportable in PUSCH transmission in the uplink. And, in the above, maxNumberMIMO-LayersCB-PSSCH-TX and maxNumberMIMO-LayersCB-PSSCH-RX mean the maximum number of layers supportable in PSSCH transmission and reception in the sidelink, respectively.

In the above, supportedModulationOrderDL means the maximum modulation order supportable in PDSCH reception in the downlink, and supportedModulationOrderUL means the maximum modulation order supportable in PUSCH transmission in the uplink. And, in the above, supportedModulationOrderSLTX and supportedModulationOrderSLRX mean the maximum modulation order supportable in transmission and reception in the sidelink, respectively. The terminal and the base station may use at least one of parameters associated with each link in determining the respective maximum data rates in the downlink, uplink, and sidelink. For example, in order to determine the maximum data rate of the sidelink, one or more parameters defined for the sidelink may be used. If a separate parameter is not defined for each link, an existing parameter (or a parameter defined for another link) may be used. For example, a sidelink transmitting terminal may use a parameter for an existing uplink, and a sidelink receiving terminal may use a parameter for an existing downlink.

는 단말이 256QAM을 지원하는지 여부에 따라 결정될 수 있다. 즉, 단말이 해당 리소스풀에서 사이드링크 송신시 256QAM이 지원되지 않으면 64QAM까지 지원되므로 사이드링크 송신의 최대 데이터율 계산에서

은 6으로 결정되고, 단말이 256QAM을 지원하면 사이드링크 송신의 최대 데이터율 계산에서

은 8로 결정될 수 있다. 또는 해당 리소스풀에 256QAM MCS table을 사용할 수 있도록 설정된 경우에는 최대 데이터율 계산에서

은 8로 결정하고, 해당 리소스풀에 256QAM MCS table을 사용할 수 없도록 설정된 경우에는 최대 데이터율 계산에서

은 6으로 결정한다. 리소스풀에 256QAM MCS table을 사용할 수 없도록 설정된 경우라 함은, 리소스풀에 설정되는 사용가능한 MCS table에 256QAM table이 포함되지 않음일 수 있다. 또는 단말에게 설정된 적어도 하나의 리소스풀에서 256QAM이 지원될 경우, 단말이 사이드링크의 최대 데이터율 결정시 모든 리소스풀에 대한 Q_m ^(j)이 8로 결정될 수 있다. 상기 리소스풀에서 256QAM이 지원된다는 것은 해당 리소스풀 설정 정보에서 256QAM MCS table이 사용될 수 있도록 설정되거나 또는 256QAM MCS 테이블이 사용되도록 미리 규격 상에 설정된 경우일 수 있다. 이러한 설정은 기지국으로부터의 상위 계층 시그널링 또는 단말 간의 상위 계층 시그널링에 의한 것일 수 있다. on the side link

may be determined depending on whether the terminal supports 256QAM. That is, if the terminal does not support 256QAM when transmitting sidelinks in the resource pool, up to 64QAM is supported, so it is necessary to calculate the maximum data rate of sidelink transmission.

is determined to be 6, and if the terminal supports 256QAM, in the calculation of the maximum data rate of sidelink transmission,

may be determined to be 8. Or, if 256QAM MCS table is enabled for the resource pool, the maximum data rate calculation

is determined to be 8, and if 256QAM MCS table is not available for the resource pool, in the calculation of the maximum data rate,

is determined by 6. A case in which the 256QAM MCS table is set not to be used in the resource pool may mean that the 256QAM table is not included in the available MCS table set in the resource pool. Alternatively, when 256QAM is supported in at least one resource pool configured for the UE, Q _m ^(j) for all resource pools may be determined as 8 when the UE determines the maximum data rate of the sidelink. The fact that 256QAM is supported in the resource pool may be a case in which the 256QAM MCS table is configured to be used in the resource pool configuration information, or the 256QAM MCS table is set in advance according to the standard to be used. This setting may be by higher layer signaling from the base station or higher layer signaling between terminals.

는 사이드링크 BWP내에 설정된 리소스풀에서 설정되거나 미리 설정된 MCS table에 따라 결정될 수도 있을 것이다. 예를 들어, 특정 단말에게, 사이드링크 BWP내에 설정된 리소스풀 중 적어도 하나의 리소스풀에 256 QAM MCS table이 사용될 수 있도록 설정되면

은 8로 결정되고, 이외의 경우에는

은 6으로 결정될 수 있다. In another embodiment, in the sidelink

may be set in a resource pool set in the sidelink BWP or determined according to a preset MCS table. For example, if the 256 QAM MCS table is set to be used for at least one resource pool among the resource pools set in the sidelink BWP for a specific terminal,

is determined to be 8, otherwise

may be determined to be 6.

값, PSSCH 송신에서 지원 가능한 최대 레이어 수를 의미하는 maxNumberMIMO-LayersCB-PSSCH-TX 파라미터에 의해 설정된 값, PSSCH 송신에서 지원 가능한 최대 modulation order를 의미하는 supportedModulationOrderSLTX 파라미터에 의해 리소스풀에 설정된 값 들 중 적어도 한 개 이상을 사용하여 최대 데이터율을 계산할 수 있다. 예를 들어, 단말은 사이드링크에서의 최대 수신 데이터율을 결정하는 과정에서 사이드링크에서 사용하는 주파수 대역에서 수신에 해당하는

값, PSSCH 수신에서 지원 가능한 최대 레이어 수를 의미하는 maxNumberMIMO-LayersCB-PSSCH-RX 파라미터에 의해 설정된 값, PSSCH 수신에서 지원 가능한 최대 modulation order를 의미하는 supportedModulationOrderSLRX 파라미터에 의해 설정된 값 들 중 적어도 한 개 이상을 사용하여 최대 데이터율을 계산할 수 있다. 또는 상기 OH 값이 리소스풀에서 PSFCH 설정 여부에 따라 결정되는 값일 수 있다. For example, in the process of determining the maximum transmission data rate in the sidelink, the terminal corresponds to transmission in a frequency band used in the sidelink.

At least one of the value set by the maxNumberMIMO-LayersCB-PSSCH-TX parameter, which means the maximum number of layers supported in PSSCH transmission, and the value set in the resource pool by the supportedModulationOrderSLTX parameter, which means the maximum modulation order supportable in PSSCH transmission. You can use more than one to calculate the maximum data rate. For example, in the process of determining the maximum reception data rate in the sidelink, the terminal corresponds to reception in a frequency band used in the sidelink.

At least one or more of the value, the value set by the maxNumberMIMO-LayersCB-PSSCH-RX parameter meaning the maximum number of layers supported in PSSCH reception, and the supportedModulationOrderSLRX parameter meaning the maximum modulation order supportable in PSSCH reception. can be used to calculate the maximum data rate. Alternatively, the OH value may be a value determined according to whether the PSFCH is configured in the resource pool.

For example, when it is determined that the PSFCH can be transmitted every slot (or when a PSFCH resource can be configured every slot), the OH may be 0.35 or 5/14, which is among the 14 symbols of one slot, the first symbol is for AGC purpose. This may be because the PSFCH occupies two symbols, and gap symbols may exist before and after the PSFCH, so that a total of 5 symbols cannot be used for data transmission. Alternatively, it may be set to 0.45 including the overhead of DMRS symbols and control information.

As another example, when it is determined that the PSFCH can be transmitted every two slots (or when a PSFCH resource can be configured every two slots), the OH may be 0.21 or 3/14, which is a slot in which the PSFCH can be transmitted. In , the overhead of 5 symbols (the first symbol is a repeated symbol used for AGC purposes, the PSFCH occupies two symbols, and gap symbols may exist before and after the PSFCH, so a total of 5 symbols) is not used for data transmission, and the PSFCH resource is not used. This is because, in a slot that does not exist, an overhead of 1 symbol (the first symbol for AGC purposes) cannot be used for data transmission, and thus the average value thereof may be 0.21. Alternatively, it may be set to 0.35 including the overhead of DMRS symbols and control information.

As another example, when it is determined that the PSFCH can be transmitted every 4 slots (or when a PSFCH resource can be configured every 4 slots), the OH may be 0.14, which is 5 symbols in the slot in which the PSFCH can be transmitted. The overhead (the first symbol is a repeating symbol used for AGC purposes, the PSFCH occupies two symbols, and there may be gap symbols before and after the PSFCH, so a total of 5 symbols) cannot be used for data transmission, and there is no PSFCH resource. This is because, in the slot, the overhead of 1 symbol (the first symbol used for AGC) cannot be used for data transmission, so the average value thereof may be 0.14. Alternatively, it may be set to 0.28 including the overhead of DMRS symbols and control information.

As another example, in a resource pool where PSFCH resources are not configured, OH may be 0.07, which is because overhead of 1 symbol (the first symbol for AGC) cannot be used for data transmission in a slot without PSFCH resources. It may be set to 0.28 including the overhead of DMRS symbols and control information.

등과 같은 다른 파라미터들이 통신 상대에 따라 별도의 값을 갖지 않는다는 것을 의미하지 않는다. 다른 파라미터들이 단말의 통신 상대에 따라 별도의 값을 가지는 경우, 위와 같은 방법이 다른 파라미터들에도 적용될 수 있다.Above, an example has been described in which the maximum number of layers, the maximum modulation order, ^{and the value of OH (j)} have separate values according to the communication counterpart of the terminal (down or / and uplink vs. sidelink), but this is only an example, f ^(j) ,

It does not mean that other parameters such as etc. do not have separate values according to the communication counterpart. When other parameters have different values according to the communication counterpart of the terminal, the above method may be applied to other parameters.

[Second embodiment]

According to an embodiment, the terminal may determine the maximum data rate by calculating the maximum data rate according to the communication counterpart or obtaining it from a stored value. In addition, the determined maximum data rate may be used for comparison with an actual instantaneous data rate. This comparison can be performed by the following Equation (2).

In Equation 2 below, the left side of the inequality sign can be viewed as an instantaneous data rate of scheduled data, and the DataRateCC on the right side can be viewed as the maximum data rate in the corresponding serving cell of the UE (which can be determined according to the UE's capability). As the DataRateCC on the right side, a corresponding value may be used depending on whether the scheduling is for transmission/reception with a base station such as PDSCH or PUSCH or scheduling for transmission/reception with a terminal such as PSSCH.

[Equation 2]

는

로 계산되며,

는 PDSCH 혹은 PSSCH의 전송에 사용되는 부반송파 간격이다. m번째 TB에 있어서,

는

에 기반하여 계산되며, A는 TB의 크기 (TBS)이며, C는 TB에 포함된 코드블록(CB: code block)의 갯수이며, C'는 해당 TB에서 스케줄된 코드블록의 갯수이다. CBG (code block group) 재전송의 경우에는 C와 C'은 다를 수 있다.

는 x보다 크지 않은 최대 정수를 의미한다. In the above, L is the number of OFDM symbols allocated to the PDSCH or PSSCH, and M is the number of TBs transmitted in the corresponding PDSCH or PSSCH. In the above, L may also include a symbol for AGC transmitted by the terminal in the sidelink.

Is

is calculated as

is a subcarrier interval used for transmission of the PDSCH or PSSCH. In the mth TB,

Is

, where A is the size of the TB (TBS), C is the number of code blocks (CB) included in the TB, and C' is the number of code blocks scheduled in the TB. In the case of CBG (code block group) retransmission, C and C' may be different.

is the largest integer not greater than x.

In the above, DataRateCC is the maximum data rate supported by the UE in a corresponding carrier or serving cell, and may be determined based on Equation 1 above. Alternatively, it may be calculated as in Equation 3 below.

[Equation 3]

Equation 3 is an equation showing an example of calculating the DataRateCC of the j-th serving cell.

는 최대 레이어 수,

는 최대 변조 오더,

는 스케일링 지수,

는 부반송파 간격을 의미할 수 있다.

는 1, 0.8, 0.75, 0.4 중 하나의 값으로 단말이 보고할 수 있으며,

는 상기의 표 8로 주어질 수 있다. 또한,

는 평균 OFDM 심볼 길이이며,

는

로 계산될 수 있고,

는 BW(j)에서 최대 RB 수이다.

는 오버헤드 값으로, FR1 (6 GHz 이하 대역)의 하향링크에서는 0.14, 상향링크에서는 0.18로 주어질 수 있으며, FR2 (6 GHz 초과 대역)의 하향링크에서는 0.08, 상향링크에서는 0.10로 주어질 수 있다. In Equation 3, R _max = 948/1024,

is the maximum number of layers,

is the maximum modulation order,

is the scaling exponent,

may mean a subcarrier spacing.

can be reported by the terminal as one of 1, 0.8, 0.75, and 0.4,

can be given in Table 8 above. In addition,

is the average OFDM symbol length,

Is

can be calculated as

is the maximum number of RBs in BW(j).

As an overhead value, 0.14 in the downlink of FR1 (band below 6 GHz) and 0.18 in the uplink, 0.08 in the downlink of FR2 (band above 6 GHz) and 0.10 in the uplink may be given.

는 사이드링크에 대해서는 다른 값이 적용될 수 있는데, FR1(6 GHz 이하 대역)에서는 OH_sub6, FR2(6 GHz 초과 대역)에서는 OH_above6와 같은 값을 가질 수 있다. 상기 OH_sub6의 값은 PSFCH(Physical Sidelink Feedback Channel)의 설정과 관계 없이 특정 값 이상을 가질 수 있다. 예를 들어 상기 OH_sub6의 값은 2/12보다 큰 값을 가질 수 있다. 혹은 OH^(j)의 값은 상위 레이어의 설정 값에 의해 결정될 수 있다. 예를 들어, 적어도 한 개 이상의 사이드링크(sidelink) 리소스 풀(resource pool)이 PSSCH(Physical Sidelink Shared Channel)의 송수신을 위하여 단말에 설정될 수 있는데, 이 중 가장 큰 밴드위스(bandwidth)를 가지는 리소스 풀의 파라미터에 의해 OH^(j) 값이 결정될 수 있다.

외의 다른 값들 또한 상기 실시예에서 기술한 바와 같이 링크의 방향별로 즉, 다운링크인지 업링크인지 혹은 사이드링크인지에 따라 다른 값이 적용될 수 있다.

_{A different value may be applied for the sidelink} , and may have the same value as _{OH sub6 in} FR1 (band below 6 GHz) and OH above6 in FR2 (band above 6 GHz). The _{value of OH sub6} may have a specific value or more regardless of the configuration of a Physical Sidelink Feedback Channel (PSFCH). For example, the _{value of OH sub6} may have a value greater than 2/12. Alternatively ^{, the value of OH(j)} may be determined by a setting value of an upper layer. For example, at least one sidelink (sidelink) resource pool (resource pool) may be configured in the terminal for transmission and reception of a PSSCH (Physical Sidelink Shared Channel), among which the resource having the largest bandwidth (bandwidth) ^{The OH (j)} value can be determined by the parameters of the pool.

Other values may also be applied according to the direction of the link, that is, depending on whether it is a downlink, an uplink, or a sidelink, as described in the above embodiment.

As an example, another method of confirming whether the actual instantaneous data rate satisfies the capability of the terminal may be calculated based on Equation 4 below. In Equation 4 below, the left side of the inequality sign can be seen as the instantaneous data rate of data transmitted from J serving cells at the scheduled moment, and the DataRate on the right side is the maximum data rate in J serving cells set in the UE according to the UE capability. can be seen as For the DataRate on the right, a value corresponding to each may be used depending on whether the scheduling is for transmission/reception with a base station such as PDSCH or PUSCH or scheduling for transmission/reception with a terminal such as PSSCH. The slot s_j is a slot in the serving cell j that overlaps or includes a specific time point at which the instantaneous data rate is to be calculated.

[Equation 4]

, 로 정의되며,

는 j번째 서빙셀의 슬롯 s_j에서의 PDSCH 혹은 PSSCH에 사용되는 부반송파간격이다. m번째 TB에 있어서,

는

로 계산되며, A는 TB의 크기 (TBS)이며, C는 TB에 포함된 코드블록 (CB)의 갯수이며, C'는 해당 TB에서 스케줄된 코드블록의 갯수이다. CBG 재전송의 경우에는 C와 C'은 다를 수 있다.

는 x보다 크지 않은 최대 정수를 의미한다. 상기에서 DataRate는 해당 단말이 설정된 J개의 서빙셀에서 지원하는 최대 데이터율이며 수학식1에 기반하여 결정될 수 있다.상기 수학식 4에서 특정 시점 (기준시점, reference time)에서의 단말의 실제 평균 전송률은 해당 시점을 포함하는 슬롯에서 스케줄링된 PDSCH, PUSCH 혹은 PSSCH에 포함된 TB 혹은 CB의 총 비트수의 합을 고려하여 결정될 수 있다. 상기에서 특정 시점을 포함하는 슬롯은 도 13과 같이 결정될 수 있다. In the above, J is the number of serving cells configured for the corresponding terminal in the corresponding frequency range. For the j-th serving cell, M is the number of TBs transmitted in slot s_j. In addition

is defined as ,

is a subcarrier interval used for PDSCH or PSSCH in slot s_j of the j-th serving cell. In the mth TB,

Is

, where A is the size of the TB (TBS), C is the number of code blocks (CBs) included in the TB, and C' is the number of code blocks scheduled in the TB. In the case of CBG retransmission, C and C' may be different.

is the largest integer not greater than x. In the above, DataRate is the maximum data rate supported by the J serving cells configured by the corresponding UE and may be determined based on Equation 1. In Equation 4, the actual average data rate of the UE at a specific time point (reference time) may be determined in consideration of the sum of the total number of bits of the TB or CB included in the PDSCH, PUSCH, or PSSCH scheduled in the slot including the corresponding time point. In the above, the slot including the specific time may be determined as shown in FIG. 13 .

In the above, an example of determining whether Equation 2 or 4 is satisfied has been described, but as another example, it is noted that the terminal performs sidelink transmission and reception in a slot unit in the sidelink and can receive data from multiple resource pools. Thus, one or a combination of the following methods may be applied.

를 이용하여 판단한다. TBS는 (하나 또는 하나 이상의) PSSCH에서 전송되는 TBS를 의미한다.

는 슬롯 길이이다. - Method 1: The terminal compares the maximum data rate and the instantaneous data rate.

is judged using TBS means TBS transmitted in (one or more) PSSCH.

is the slot length.

를 이용하여 판단한다. TBS_j는 j번째 리소스 풀에서 전송되는 TBS를 의미한다.

는 슬롯 길이이다.- Method 2: The terminal compares the maximum data rate with the instantaneous data rate.

is judged using TBS _j means TBS transmitted from the j-th resource pool.

is the slot length.

When 'the maximum data rate in the corresponding serving cell of the terminal when communicating with the base station is DataRateCC ₁ ', and 'the maximum data rate in the corresponding serving cell of the terminal when communicating with another terminal is DataRateCC ₂ ', the terminal communicates A value applied to the right side of [Equation 2] may be determined according to the counterpart. When 'the maximum data rate in the J serving cells of the terminal when communicating with the base station is DataRate ₁ ', 'the maximum data rate in the J serving cells of the terminal when communicating with other terminals is DataRate ₂ '. The terminal may determine the value applied to the right side of [Equation 4] according to the communication counterpart. If the actual instantaneous data rate is greater than the DataRateCC or DataRate value determined according to the communication counterpart, the reception or transmission operation in the corresponding slot may be omitted. Specifically, PDSCH reception and PUSCH transmission operations from the base station may be omitted in the corresponding slot, or PSSCH transmission and reception operations may be omitted in the corresponding slot.

11B is a flowchart illustrating a method for determining whether a UE has received PDSCH decoding, PUSCH transmission, and PSSCH reception according to an embodiment of the present invention. The terminal may check the supportable peak data rate (DR_1) in communication with the base station (1105). The terminal determines whether to additionally perform V2X communication (1110), and when the terminal additionally needs to perform V2X communication, that is, when the terminal needs to perform direct communication with another terminal, the terminal performs V2X communication (direct communication with another terminal) ), the terminal can check the supportable peak data rate (DR_2) (1115). The UE may monitor the PDCCH in a predetermined resource region such as CORESET, and as a result of monitoring the PDCCH, determines whether the PDSCH or the PUSCH is scheduled ( 1120 ). As a result of PDCCH monitoring, when a PDSCH or PUSCH is scheduled, the instantaneous data rate of the corresponding PDSCH or PUSCH is compared with DR_1 ( 1130 ), and if the instantaneous data rate exceeds DR_1 , the UE may ignore the scheduling ( 1145 ). In the opposite case, a reception or transmission operation may be performed according to the corresponding scheduling ( 1140 ). As a result of monitoring the PDCCH, the UE determines whether the PSSCH is scheduled (1125), compares the instantaneous data rate of the PSSCH with DR_2 when the PSSCH is scheduled (1135), and when the instantaneous data rate exceeds DR_2, the scheduling can be ignored (1145). In the opposite case, the reception operation of the PSSCH may be performed according to the corresponding scheduling (1140).

[Third embodiment]

Regarding the scheduling of retransmission, for example, if the condition of [Equation 2] or [Equation 4] must be satisfied even if retransmission is performed, there may be many cases in which retransmission cannot be scheduled. 12 illustrates an example in which a sidelink symbol or channel is mapped to a slot and used. If TB1 in slot n (1200) satisfies the comparison of the maximum data rate and the instantaneous data rate, TB1 may be initially transmitted in slot n (1200). The TB1 may not satisfy the 'comparison of the maximum data rate and the instantaneous data rate' in slots n+1 (1210) and slot n+3 (1220). Therefore, TB1 cannot be retransmitted in slot n+1 (1210) and slot n+3 (1220).

According to an embodiment, the comparison of the maximum data rate and the instantaneous data rate using [Equation 2] or [Equation 4] may be applied differently depending on whether initial transmission or retransmission is performed. For example, the terminal uses [Equation 2] or [Equation 4] to apply 'comparison of the maximum data rate and the instantaneous data rate' only to the initial transmission between the terminal and another terminal, and at least a part included in the initial transmission. In the case of retransmitting the data of , the 'comparison of the maximum data rate and the instantaneous data rate' may not be performed. That is, in the case of retransmission, the UE may perform transmission or reception of the PSSCH without 'comparison of the maximum data rate and the instantaneous data rate'.

_{A case in which the I MCS} value for at least one TB in the SCI transmitted through the PSCCH is greater than a specific value (W) may be considered as sidelink retransmission for the at least one TB. It can be configured which MCS Table to be used by the UE through higher layer signaling such as mcs-Table-SL, and the specific corresponding to retransmission according to the configured MCS table (MCS table 1, MCS table 2, MCS table 3). A value W may be determined. For example, when MCS table 2 is set, the MCS value included in the SCI is greater than 27, that is, the MCS value 28, 29, 30, or 31 corresponds to retransmission, and MCS table 1 or MCS table 3 is set When the MCS value is greater than 28, that is, the MCS value 29, 30, or 31 corresponds to retransmission, and the terminal and the base station can understand.

[Fourth embodiment]

The present embodiment relates to a method and apparatus for scheduling and receiving data so as not to exceed a maximum data rate of a terminal when transmitting or retransmitting data. In this embodiment and subsequent embodiments, data may be referred to as a TB or a transport block or a transport block in combination.

When the terminal accesses the base station, the capability of the terminal may be reported to the base station, and the capability of the terminal includes at least one of the parameters capable of calculating the maximum data rate of the terminal, such as the maximum number of layers that the terminal can support, and the maximum modulation order. One may be included.

와 같은 파라미터를 포함할 수 있다.The maximum data rate of the terminal may be calculated, for example, as given in Equation 1, based on the capability of the terminal reported to the base station and parameters set by the base station through RRC signaling to the terminal. The maximum data rate of the terminal may be determined based on the baseband processing or signal processing capability of the terminal, including channel estimation, equalization, channel code decoding, multi-antenna reception, and the like. That is, when the maximum data rate of a certain terminal is high, it can be seen that the signal processing capability of the corresponding terminal is high. The terminal may calculate a 'maximum data rate' for communication with the base station and a 'maximum data rate' for communication with the terminal, respectively. Different values may be used for at least one parameter used when calculating the 'maximum data rate' depending on the communication counterpart. The parameter is at least

It may include parameters such as

The terminal may receive downlink control information or sidelink control information including scheduling information, determine the scheduling information, and calculate an actual instantaneous data rate therefrom using at least one of the following methods.

The UE may know the amount of data to be transmitted/received or the TBS value from the scheduling information, and may also check the number of symbols to which the PDSCH, PUSCH, or PSSCH is mapped.

If the actual data rate calculated based on the information scheduled for the terminal is greater than the maximum data rate of the corresponding terminal, the terminal may not be able to finish the signal processing required to transmit/receive scheduled data within a given time. Therefore, it may be necessary for the base station to schedule so that the actual instantaneous data rate is smaller than the maximum data rate of the corresponding terminal. This is because, when scheduling is performed so that the actual instantaneous data rate is greater than the maximum data rate of the terminal, the terminal cannot complete signal processing within a given time, and thus frequency time resources are inefficiently used.

Scheduling and data transmission/reception methods may vary according to a method of calculating the actual instantaneous data rate. For example, a method of checking whether an actual instantaneous data rate satisfies the capability of the terminal may be calculated based on Equation 2 above.

13 is a diagram illustrating an example of determining a slot including the specific time in a carrier configured for upper signaling to a terminal according to an embodiment of the present invention.

Depending on the subcarrier spacing, the length of the slot may be different for each carrier, and the indicated slot is the slot including a specific time point. As the specific time is changed, for example, from the reference time A to the reference time B, a slot including the specific time may be changed from, for example, the slots A1, A2, and A3 to the slots B1, B2, and B3.

In the example of FIG. 13 , the slot A1 and the slot B1 may be the same slot, and the slot A2 and the slot B2 may be the same slot. Therefore, for example, when calculating the actual average data rate of the UE at the reference time A, the PDSCH, PUSCH or Code blocks transmitted in the PDSCH, PUSCH, or PSSCH may be used in consideration of only the PSSCH.

When the reference viewpoint changes from D to reference viewpoint E, slots including the reference viewpoint are changed from D1, D2, and D3 to E1, E2, and E3, and in this case, all slots including the reference viewpoint are changed. The UE can perform operations for PDSCH reception, PUSCH transmission, and PSSCH transmission/reception only when the actual transmission rate calculated as described above is scheduled to be smaller than its maximum transmission rate calculated as in Equation 1, and if its maximum transmission rate When the calculated actual data rate is larger, the PDSCH reception, PUSCH transmission, and PSSCH transmission/reception operations in the corresponding slot may be omitted. In this embodiment and subsequent embodiments, a slot including a reference viewpoint may be referred to as an overlapping slot.

Equation 4 above may be a condition applied to all cases including initial transmission and retransmission, and Equation 2 may be a condition applied to retransmission. However, Equation 2 or 4 is only an example of a condition for limiting scheduling, and is not limited to the scope of the present invention.

For all cases in which the base station schedules retransmission of a specific TB to the terminal, if scheduling is restricted to satisfy the condition of Equation 2, for example, there may be many cases in which retransmission cannot be scheduled.

In the above, when the base station "scheduled retransmission of a specific TB" to the terminal is "when MCS is greater than 27" when set to the following MCS table 2, or "when MCS is greater than 28" when configured other than MCS table 2 It may mean the condition of ".

In actual retransmission of the NR system, it is scheduled using all MCS values, and data transmission and reception can be performed. Scheduling retransmission in this embodiment and subsequent embodiments can be interpreted as scheduling using an MCS value greater than 27, that is, an MCS value of 28, 29, 30, or 31 when scheduling based on MCS table 2. However, the present disclosure is not limited thereto and the invention of the present disclosure may be applied even in the case of retransmission even if a different MCS value is used.

In addition, scheduling retransmission in this embodiment and subsequent embodiments means that the MCS value is other than MCS Table 2 (Table 22), or when scheduling is based on MCS Table 1 (Table 21) or MCS Table 3 (Table 23). Although it can be interpreted as scheduling using a value greater than 28, that is, 29, 30, or 31, the present disclosure is not limited thereto, and the invention of the present disclosure may be applied even in the case of retransmission even if another MCS value is used.

[Table 21]

[Table 22]

[Table 23]

or more specifically, I _MCS for at least one TB in DCI If the value is greater than a specific value (W = 27 or 28), it may be assumed or considered as retransmission. In the above, _{a specific value for comparison with I MCS} may be determined to be 27 or 28 according to a setting for which MCS table to be used.

For example, the specific value W may be determined according to a higher layer parameter mcs-Table value included in settings related to PDSCH transmission, PUSCH transmission, or SPS transmission. For example, when set to 'qam256', the specific value is 27 and may be 28 in other cases.

As an example, 120 kHz subcarrier spacing is used, in 100 MHz frequency bandwidth, two-layer transmission, and transmission with 64 QAM, TB given by the base station to the terminal, MCS 26, initial transmission using PDSCH for 7 symbols , it may not be possible to perform retransmission with the same 7 symbols. This is because a specific terminal may not be able to process scheduling in which the condition of Equation 2 is violated.

Therefore, when the retransmission is performed, the case in which the scheduling constraint condition (eg, Equation 2) is taken into account when the base station and the terminal determine the subsequent operation may be limited to specific cases. Meanwhile, in the following, Equation 2 will be described as an example of a scheduling constraint, but the embodiment of the present invention is not limited thereto.

As an example, the scheduling constraint may be limited to being applied only when the number of symbols L allocated to PDSCH transmission of retransmission is less than 7. This is if retransmission is performed or I _{MCS for at least one TB in DCI} When the value is greater than a specific value (W = 27 or 28), it may be a method in which the condition given by Equation 2 is considered only when the PDSCH is mapped to the number of symbols less than 7 symbols and transmitted. That is, when the number of symbols L to which the PDSCH used for retransmission is mapped is greater than or equal to 7, the condition of Equation 2 is not applied.

When determining the number of symbols used for PDSCH mapping, the number of symbols allocated for PDSCH transmission, or the number of symbols used for PDSCH transmission in this embodiment and subsequent embodiments, a demodulation reference signal (DMRS) symbol for the PDSCH may also be included in a symbol used for PDSCH transmission. That is, in order to determine the number of symbols, both DCI indicating PDSCH mapping information and symbol-related configuration information for PDSCH transmission transmitted through higher signaling may be considered. In the case of the PUSCH, symbols used for PUSCH transmission may be determined, including the DMRS symbol for the PUSCH.

Considering the condition of Equation 2 only when the PDSCH is mapped to the number of symbols smaller than 7 symbols in the above, the frequency of scheduling in which data transmitted in the initial transmission is mapped to symbols of the number of symbols smaller than 7 symbols This may be because there are few, and many cases are mapped to symbols of 7 or more symbols. According to the relaxation of these conditions, the complexity of the base station scheduling algorithm and implementation method can be reduced.

In this embodiment, the method of applying the number of symbols L to which the PDSCH used for retransmission is mapped by comparing with 7 symbols has been described as an example, but the scope of the present invention is not limited to 7 symbols, 8 symbols or 9 symbols It can also be extended and applied to a method of comparing based on the number of symbols of other numbers, for example.

In addition to the embodiment in which the scheduling restriction condition (Equation 2) is applied based on the retransmission or not and the number of symbols of the PDSCH, Equation 2 may be a condition applied in other cases. As an example, when the UE reports the capability of fast processing time, or when an upper parameter of Capability2-PDSCH-Processing is set, or when processingType2Enabled in the upper parameter set of PDSCH-ServingCellConfig (or PUSCH-ServingCellConfig) is set to TRUE Equation 2 may also be applied to . The application of Equation 2 above may mean that data transmission/reception is performed based on the scheduling only in the case of scheduling that satisfies Equation 2 by checking the condition of Equation 2 above.

[Example 5]

The present embodiment relates to another method and apparatus for scheduling and receiving data so as not to exceed a maximum data rate of a terminal when transmitting or retransmitting data. In this embodiment and subsequent embodiments, data may be referred to as a TB or a transport block or a transport block in combination.

When the terminal accesses the base station, the capability of the terminal may be reported to the base station, and the capability of the terminal includes at least one of the parameters capable of calculating the maximum data rate of the terminal, such as the maximum number of layers that the terminal can support, and the maximum modulation order. One can be included.

와 같은 파라미터를 포함할 수 있다.The maximum data rate of the terminal may be calculated, for example, as given in Equation 1, based on the capability of the terminal reported to the base station and parameters set by the base station through RRC signaling to the terminal. The maximum data rate of the terminal may be determined based on the baseband processing or signal processing capability of the terminal, including channel estimation, equalization, channel code decoding, multi-antenna reception, and the like. That is, when the maximum data rate of a certain terminal is high, it can be seen that the signal processing capability of the corresponding terminal is high. The terminal may calculate a 'maximum data rate' for communication with the base station and a 'maximum data rate' for communication with the terminal, respectively. Different values may be used for at least one parameter used when calculating the 'maximum data rate' depending on the communication counterpart. The parameter is at least

It may include parameters such as

The terminal may receive downlink control information or sidelink control information including scheduling information, determine the scheduling information, and calculate an actual instantaneous data rate therefrom using at least one of the following methods.

The UE may know the amount of data to be transmitted/received or the TBS value from the scheduling information, and may also check the number of symbols to which the PDSCH, PUSCH, or PSSCH is mapped.

If the actual data rate calculated based on the information scheduled for the terminal is greater than the maximum data rate of the corresponding terminal, the terminal may not be able to finish the signal processing required to transmit/receive scheduled data within a given time. Therefore, it may be necessary for the base station to schedule so that the actual instantaneous data rate is smaller than the maximum data rate of the corresponding terminal. This is because, when scheduling is performed so that the actual instantaneous data rate is greater than the maximum data rate of the terminal, the terminal cannot complete signal processing within a given time, and thus frequency time resources are inefficiently used.

Scheduling and data transmission/reception methods may vary according to a method of calculating the actual instantaneous data rate. For example, a method of checking whether the actual instantaneous data rate satisfies the capability of the terminal may be calculated based on Equation 2 above. In Equation 2, the left side of the inequality sign can be viewed as a scheduled instantaneous data rate, and the DataRateCC on the right side can be viewed as the maximum data rate in the corresponding serving cell of the UE determined according to the UE capability. As the DataRateCC on the right side, a corresponding value may be used depending on whether the scheduling is for transmission/reception with a base station such as PDSCH or PUSCH or scheduling for transmission/reception with a terminal such as PSSCH.

For example, another method of confirming whether the actual instantaneous data rate satisfies the capability of the terminal may be calculated based on Equation 4 above. In Equation 4, the left side of the inequality sign can be seen as the instantaneous data rate transmitted from J serving cells at the scheduled moment, and the DataRate on the right side is the maximum data rate of the J serving cells set in the UE according to the UE capability. can For the DataRate on the right, a value corresponding to each may be used depending on whether the scheduling is for transmission/reception with a base station such as PDSCH or PUSCH or scheduling for transmission/reception with a terminal such as PSSCH. The slot s_j is a slot in the serving cell j that overlaps or includes a specific time point at which the instantaneous data rate is to be calculated.

Equation 4 above may be a condition applied to all cases including initial transmission and retransmission, and Equation 2 may be a condition applied to retransmission. However, Equation 2 or 4 is only an example of a condition for limiting scheduling and is not limited to the scope of the present invention.

For all cases in which the base station schedules retransmission of a specific TB to the terminal, if scheduling is restricted to satisfy the condition of Equation 2, for example, there may be many cases in which retransmission cannot be scheduled. In the above, when the base station or the terminal "scheduled the retransmission of a specific TB" to the terminal is set to the following MCS table 2, when the MCS indicated by the indicator included in DCI or SCI is greater than 27, or other than the following MCS table 2 When set to the case of , it may mean a condition when the MCS is greater than 28. Specific details are the same as described above.

Or more specifically, I _MCS for at least one TB in DCI or SCI If the value is greater than a specific value (W = 27 or 28), it may be assumed or considered as retransmission. In the above, _{a specific value for comparison with I MCS} may be determined to be 27 or 28 according to a setting for which MCS table to be used.

For example, the specific value W may be determined according to a higher layer parameter mcs-Table value or mcs-Table-SL value included in settings related to PDSCH transmission, PUSCH transmission, PSSCH transmission/reception, or SPS transmission, for example, 'qam256 ', the specific value may be 27, and in other cases, it may be 28.

This may be different depending on which table among [MCS Table 1], [MCS Table 2], and [MCS Table 3] is determined based on which table the scheduling for data transmission is determined from.

As an example, 120 kHz subcarrier spacing is used, in 100 MHz frequency bandwidth, 2-layer transmission, and transmission with 64 QAM, TB given by the base station or terminal to the terminal MCS 26 and 7 symbols using PDSCH Upon initial transmission, the base station or the terminal may not be able to perform retransmission with the same 7 symbols. This is because a specific terminal may not be able to process scheduling in which the condition of Equation 2 is violated.

Therefore, when the retransmission is performed, the case in which the scheduling constraint condition (eg, Equation 2) is taken into account when the base station and the terminal determine the subsequent operation may be limited to specific cases. Meanwhile, in the following, Equation 2 will be described as an example of a scheduling constraint, but the embodiment of the present invention is not limited thereto.

For example, when scheduling retransmission of a specific TB, the condition of Equation 2 only when the number of symbols L' to which the PDSCH or PSSCH used for retransmission is mapped is less than the number of symbols L' to which the PDSCH or PSSCH used for initial transmission is mapped. A method may be used to apply That is, when the number of symbols L to which the PDSCH or PSSCH used for retransmission is mapped is equal to or greater than the number of symbols L' to which the PDSCH or PSSCH used for initial transmission is mapped, the condition of Equation 2 may not be applied.

When determining the number of symbols used for PDSCH or PSSCH mapping in this embodiment and subsequent embodiments, demodulation reference signal (DMRS) symbols for PDSCH or PSSCH may also be included in symbols used for PDSCH or PSSCH transmission. That is, to determine the number of symbols, DCI or SCI indicating PDSCH or PSSCH mapping information or all symbols used for PDSCH or PSSCH transmission transmitted through higher signaling may be considered. In the case of the PUSCH, symbols used for PUSCH transmission may be determined, including the DMRS symbol for the PUSCH.

According to this, when retransmission is performed or I _{MCS for at least one TB in DCI or SCI} In the case where the value is greater than a specific value (W = 27 or 28), the above equation is only transmitted when the PDSCH or PSSCH for retransmission is mapped to a number of symbols less than the number of symbols mapped to the PDSCH or PSSCH used for initial transmission. A scheduling constraint given by 2 may be considered. This may be because, in many cases, the base station uses the same number of symbols for initial transmission and retransmission to reduce the complexity of the base station scheduling algorithm and implementation method.

In addition to the embodiment in which the scheduling restriction condition (Equation 2) is applied based on the retransmission status and the number of symbols of the PDSCH or PSSCH, Equation 2 may be a condition applied in other cases. As an example, when the UE reports the capability of fast processing time, or when an upper parameter of Capability2-PDSCH-Processing is set, or when processingType2Enabled in the upper parameter set of PDSCH-ServingCellConfig (or PUSCH-ServingCellConfig) is set to TRUE Equation 2 may also be applied to . The application of Equation 2 above may mean that data transmission/reception is performed based on the scheduling only in the case of scheduling that satisfies Equation 2 by checking the condition of Equation 2 above.

[Sixth embodiment]

The present embodiment relates to another method and apparatus for scheduling and receiving data so as not to exceed a maximum data rate of a terminal when transmitting or retransmitting data. In this embodiment and subsequent embodiments, data may be referred to as a TB or a transport block or a transport block in combination.

When the terminal accesses the base station, the capability of the terminal may be reported to the base station, and the capability of the terminal includes at least one of the parameters capable of calculating the maximum data rate of the terminal, such as the maximum number of layers that the terminal can support, and the maximum modulation order. One may be included.

와 같은 파라미터를 포함할 수 있다.The maximum data rate of the terminal may be calculated, for example, as given in Equation 1, based on the capability of the terminal reported to the base station and parameters set by the base station through RRC signaling to the terminal. The maximum data rate of the terminal may be determined based on the baseband processing or signal processing capability of the terminal, including channel estimation, equalization, channel code decoding, multi-antenna reception, and the like. That is, when the maximum data rate of a certain terminal is high, it can be seen that the signal processing capability of the corresponding terminal is high. The terminal may calculate a 'maximum data rate' for communication with the base station and a 'maximum data rate' for communication with the terminal, respectively. Different values may be used for at least one parameter used when calculating the 'maximum data rate' depending on the communication counterpart. The parameter is at least

It may include parameters such as

The terminal may receive downlink control information or sidelink control information including scheduling information, determine the scheduling information, and calculate an actual instantaneous data rate therefrom using at least one of the following methods.

The UE may know the amount of data to be transmitted/received or the TBS value from the scheduling information, and may also check the number of symbols to which the PDSCH, PUSCH, or PSSCH is mapped.

If the actual data rate calculated based on the information scheduled for the terminal is greater than the maximum data rate of the corresponding terminal, the terminal may not be able to finish the signal processing required to transmit/receive scheduled data within a given time. Therefore, it may be necessary for the base station to schedule so that the actual instantaneous data rate is smaller than the maximum data rate of the corresponding terminal. This is because, when scheduling is performed so that the actual instantaneous data rate is greater than the maximum data rate of the terminal, the terminal cannot complete signal processing within a given time, and thus frequency time resources are inefficiently used.

Scheduling and data transmission/reception methods may vary according to a method of calculating the actual instantaneous data rate. For example, a method of checking whether the actual instantaneous data rate satisfies the capability of the terminal may be calculated based on Equation 2 above. In Equation 2, the left side of the inequality sign can be seen as a scheduled instantaneous data rate, and the DataRateCC on the right side can be seen as the maximum data rate in the corresponding serving cell of the UE determined according to the UE capability. As the DataRateCC on the right side, a corresponding value may be used depending on whether the scheduling is for transmission/reception with a base station such as PDSCH or PUSCH or scheduling for transmission/reception with a terminal such as PSSCH.

As an example, another method of checking whether the actual instantaneous data rate satisfies the capability of the terminal may be calculated based on Equation 4 above. In Equation 4, the left side of the inequality sign can be seen as the instantaneous data rate transmitted from J serving cells at the scheduled moment, and the DataRate on the right side can be regarded as the maximum data rate in the J serving cells set in the UE according to the UE capability. can For the DataRate on the right, a value corresponding to each may be used depending on whether the scheduling is for transmission/reception with a base station such as PDSCH or PUSCH or scheduling for transmission/reception with a terminal such as PSSCH. The slot s_j is a slot in the serving cell j that overlaps or includes a specific time point at which the instantaneous data rate is to be calculated.

Equation 4 above may be a condition applied to all cases including initial transmission and retransmission, and Equation 2 may be a condition applied to retransmission. However, Equation 2 or 4 is only an example of a condition for limiting scheduling and is not limited to the scope of the present invention.

For all cases in which the base station schedules retransmission of a specific TB to the terminal, if scheduling is restricted to satisfy the condition of Equation 2, for example, there may be many cases in which retransmission cannot be scheduled. In the above, that the base station or the terminal schedules the retransmission of a specific TB to the terminal means that when MCS table 2 is set, MCS indicated by an indicator included in DCI or SCI is greater than 27, or when it is set other than MCS table 2, MCS may mean a condition when is greater than 28. Specific details are the same as described above.

Or more specifically, I _MCS for at least one TB in DCI or SCI A case in which the value is greater than a specific value (W = 27 or 28) may be assumed or considered as retransmission. In the above, _{a specific value for comparison with I MCS} may be determined to be 27 or 28 according to a setting for which MCS table to be used.

For example, the specific value W may be determined according to an upper parameter mcs-Table value or mcs-Table-SL value in a setting related to PDSCH transmission, PUSCH transmission, PSSCH transmission/reception, or SPS transmission, for example as 'qam256' If set, the specific value may be 27, and in other cases, it may be 28.

As an example, 120 kHz subcarrier spacing is used, in 100 MHz frequency bandwidth, 2-layer transmission, and transmission with 64 QAM, TB given by the base station or terminal to the terminal MCS 26 and 7 symbols using PDSCH Upon initial transmission, the base station or the terminal may not be able to perform retransmission with the same 7 symbols. This is because a specific terminal may not be able to process scheduling in which the condition of Equation 2 is violated.

Therefore, when the retransmission is performed, the case in which the scheduling constraint condition (eg, Equation 2) is taken into account when the base station and the terminal determine the subsequent operation may be limited to specific cases. Meanwhile, in the following, Equation 2 will be described as an example of a scheduling constraint, but the embodiment of the present invention is not limited thereto.

For example, when scheduling retransmission of a specific TB, the number of symbols L to which the PDSCH or PSSCH used for retransmission is mapped is smaller than the number of symbols L' mapped to the PDSCH or PSSCH used for initial transmission and less than 7 symbols. A method for applying the condition of Equation 2 may be used. That is, the number of symbols L' to which the PDSCH or PSSCH used for retransmission is mapped is equal to or greater than the number of symbols L' to which the PDSCH or PSSCH used for initial transmission is mapped, or the symbol to which the PDSCH or PSSCH used for retransmission is mapped. When the number L is equal to or greater than 7 symbols, the condition of Equation 2 may not be applied.

As another example, when scheduling retransmission of a specific TB, the number of symbols L to which the PDSCH or PSSCH used for retransmission is mapped is smaller than the smaller of the number L' and 7 to which the PDSCH or PSSCH used for initial transmission is mapped. A method of applying the condition of Equation 2 may be used only when That is, the condition of Equation 2 is applied only when the number of symbols L to which the PDSCH or PSSCH used for retransmission is mapped is less than min(L', 7).

When determining the number of symbols used for PDSCH or PSSCH mapping in this embodiment and subsequent embodiments, demodulation reference signal (DMRS) symbols for PDSCH or PSSCH may also be included in symbols used for PDSCH or PSSCH mapping. That is, to determine the number of symbols, DCI or SCI indicating PDSCH or PSSCH mapping information or all symbols used for PDSCH or PSSCH transmission transmitted through higher signaling may be considered. Similarly, in the case of PUSCH, the DMRS symbol for PUSCH may be included in a symbol used for PUSCH mapping and may be determined.

According to this, when retransmission is performed or I _{MCS for at least one TB in DCI or SCI} When the value is greater than a specific value (W = 27 or 28), Equation 2 above only when the PDSCH or PSSCH for retransmission is mapped to a smaller number of symbols than the number of symbols mapped to the PDSCH or PSSCH used for initial transmission. A scheduling constraint given by can be considered. This is the method proposed in this embodiment based on the fact that in many cases, the base station uses the same number of symbols for initial transmission and retransmission, and scheduling in the case of a large TBS is performed in a case where the number of symbols is greater than 7 symbols. This may be because it is possible to reduce the complexity of the base station scheduling algorithm and implementation method.

In addition to the embodiment in which the scheduling restriction condition (Equation 2) is applied based on the retransmission status and the number of symbols of the PDSCH or PSSCH, Equation 2 may be a condition applied in other cases. As an example, when the UE reports the capability of fast processing time, or when an upper parameter of Capability2-PDSCH-Processing is set, or when processingType2Enabled in the upper parameter set of PDSCH-ServingCellConfig (or PUSCH-ServingCellConfig) is set to TRUE Equation 2 may also be applied to . The application of Equation 2 above may mean that data transmission/reception is performed based on the scheduling only when the scheduling satisfies Equation 2 by checking the condition of Equation 2

[Seventh embodiment]

The present embodiment relates to another method and apparatus for scheduling and receiving data so as not to exceed a maximum data rate of a terminal when transmitting or retransmitting data. In this embodiment and subsequent embodiments, data may be referred to as a TB or a transport block or a transport block in combination.

When the terminal accesses the base station, the capability of the terminal may be reported to the base station, and the capability of the terminal includes at least one of the parameters capable of calculating the maximum data rate of the terminal, such as the maximum number of layers that the terminal can support, and the maximum modulation order. One may be included.

와 같은 파라미터를 포함할 수 있다.The maximum data rate of the terminal may be calculated, for example, as given in Equation 1, based on the capability of the terminal reported to the base station and parameters set by the base station through RRC signaling to the terminal. The maximum data rate of the terminal may be determined based on the baseband processing or signal processing capability of the terminal, including channel estimation, equalization, channel code decoding, multi-antenna reception, and the like. That is, when the maximum data rate of a certain terminal is high, it can be seen that the signal processing capability of the corresponding terminal is high. The terminal may calculate a 'maximum data rate' for communication with the base station and a 'maximum data rate' for communication with the terminal, respectively. Different values may be used for at least one parameter used when calculating the 'maximum data rate' depending on the communication counterpart. The parameter is at least

It may include parameters such as

The terminal may receive downlink control information or sidelink control information including scheduling information, determine the scheduling information, and calculate an actual instantaneous data rate therefrom using at least one of the following methods.

The UE may know the amount of data to be transmitted/received or the TBS value from the scheduling information, and may also check the number of symbols to which the PDSCH, PUSCH, or PSSCH is mapped.

If the actual data rate calculated based on the information scheduled for the terminal is greater than the maximum data rate of the corresponding terminal, the terminal may not be able to finish the signal processing required to transmit/receive scheduled data within a given time. Therefore, it may be necessary for the base station to schedule so that the actual instantaneous data rate is smaller than the maximum data rate of the corresponding terminal. This is because, when scheduling is performed so that the actual instantaneous data rate is greater than the maximum data rate of the terminal, the terminal cannot complete signal processing within a given time, and thus frequency time resources are inefficiently used.

Scheduling and data transmission/reception methods may vary according to a method of calculating the actual instantaneous data rate. For example, a method of checking whether the actual instantaneous data rate satisfies the capability of the terminal may be calculated based on Equation 2 above. In Equation 2, the left side of the inequality sign can be seen as a scheduled instantaneous data rate, and the DataRateCC on the right side can be seen as the maximum data rate in the corresponding serving cell of the UE determined according to the UE capability. As the DataRateCC on the right side, a corresponding value may be used depending on whether the scheduling is for transmission/reception with a base station such as PDSCH or PUSCH or scheduling for transmission/reception with a terminal such as PSSCH.

As an example, another method of checking whether the actual instantaneous data rate satisfies the capability of the terminal may be calculated based on Equation 4 above. In Equation 4, the left side of the inequality sign can be seen as the instantaneous data rate transmitted from J serving cells at the scheduled moment, and the DataRate on the right side is the maximum data rate of J serving cells set in the UE according to the UE capability. can For the DataRate on the right, a value corresponding to each may be used depending on whether the scheduling is for transmission/reception with a base station such as PDSCH or PUSCH or scheduling for transmission/reception with a terminal such as PSSCH. The slot s_j is a slot in the serving cell j that overlaps or includes a specific time point at which the instantaneous data rate is to be calculated.

Equation 4 above may be a condition applied to all cases including initial transmission and retransmission, and Equation 2 may be a condition applied to retransmission. However, Equation 2 or 4 is only an example of a condition for limiting scheduling and is not limited to the scope of the present invention.

For all cases in which the base station or the terminal schedules the retransmission of a specific TB to the terminal, for example, if the scheduling is limited to satisfy the condition of Equation 2, there may be many cases in which the retransmission cannot be scheduled. In the above, when the base station or the terminal schedules the retransmission of a specific TB to the terminal, when the MCS table 2 below is set, when the MCS indicated by the indicator included in DCI or SCI is greater than 27, or when it is set other than MCS table 2 It may mean a condition when MCS is greater than 28. Specific details are the same as described above.

Or more specifically, I _MCS for at least one TB in DCI or SCI A case in which the value is greater than a specific value (W = 27 or 28) may be assumed or considered as retransmission. In the above, _{a specific value for comparison with I MCS} may be determined to be 27 or 28 according to a setting for which MCS table to be used.

For example, the specific value W may be determined according to a higher layer parameter mcs-Table value or mcs-Table-SL value included in settings related to PDSCH transmission, PUSCH transmission, PSSCH transmission/reception, or SPS transmission, for example, 'qam256 ', the specific value may be 27, and in other cases, it may be 28.

As an example, 120 kHz subcarrier spacing is used, in 100 MHz frequency bandwidth, two-layer transmission, and transmission with 64 QAM, TB given by the base station or terminal to the terminal, MCS 26, PDSCH or PSSCH in 7 symbols When initial transmission is performed using the BS, the base station or the terminal may not be able to perform retransmission with the same 7 symbols. This is because a specific terminal may not be able to process scheduling in which the condition of Equation 2 is violated.

Therefore, when the retransmission is performed, the case in which the scheduling constraint condition (eg, Equation 2) is taken into account when the base station and the terminal determine the subsequent operation may be limited to specific cases. Meanwhile, in the following, Equation 2 will be described as an example of a scheduling constraint, but the embodiment of the present invention is not limited thereto.

For example, when scheduling retransmission of a specific TB, for the number of symbols L' to which the PDSCH or PSSCH used for initial transmission is mapped, the number of symbols L' to which the PDSCH or PSSCH used for retransmission is mapped is greater than L'-x symbols. A method of applying the condition of Equation 2 only when it is small may be used. That is, when the number of symbols L to which the PDSCH or PSSCH used for retransmission is mapped is equal to or greater than the number of symbols L'-x to which the PDSCH or PSSCH used for initial transmission is mapped, the condition of Equation 2 may not be applied. .

In the above, the x value may be applied as a fixed value such as 2 or 3, but may be a value that the base station separately sets as higher signaling. For example, when the value of x is set to 2 or predetermined, the number of symbols L to which the PDSCH or PSSCH used for retransmission is mapped with respect to the number of symbols L' to which the PDSCH or PSSCH used for initial transmission is mapped is When it is less than L'-2, the condition of Equation 2 may be applied.

When determining the number of symbols used for PDSCH or PSSCH mapping in this embodiment and subsequent embodiments, demodulation reference signal (DMRS) symbols for PDSCH or PSSCH may also be included in the number of symbols used for PDSCH or PSSCH mapping. That is, to determine the number of symbols, DCI or SCI indicating PDSCH or PSSCH mapping information or all symbols used for PDSCH or PSSCH transmission transmitted through higher signaling may be considered. Similarly, in the case of PUSCH, the DMRS symbol for PUSCH may be included in a symbol used for PUSCH mapping and may be determined.

According to this, when retransmission is performed or I _{MCS for at least one TB in DCI or SCI} When the value is greater than a specific value (W = 27 or 28), Equation 2 above only when the PDSCH or PSSCH for retransmission is mapped to a number of symbols less than the number of symbols mapped to the PDSCH or PSSCH used for initial transmission. A scheduling constraint given by can be considered. In many cases, the base station scheduling algorithm and the base station scheduling algorithm and This may be because the complexity of the implementation method can be lowered.

In addition to the embodiment in which the scheduling restriction condition (Equation 2) is applied based on the retransmission status and the number of symbols of the PDSCH or PSSCH, Equation 2 may be a condition applied in other cases. As an example, when the UE reports the capability of fast processing time, or when an upper parameter of Capability2-PDSCH-Processing is set, or when processingType2Enabled in the upper parameter set of PDSCH-ServingCellConfig (or PUSCH-ServingCellConfig) is set to TRUE Equation 2 may also be applied to . The application of Equation 2 above may mean that data transmission/reception is performed based on the scheduling only in the case of scheduling that satisfies Equation 2 by checking the condition of Equation 2 above.

Hereinafter, the operation of the terminal will be described.

The UE may check a condition for determining a subsequent operation method through DCI or SCI transmitted through PDCCH.

According to an embodiment, the condition of Equation 5 below may be used to determine a subsequent operation method when the DCI or the SCI is confirmed as a result of the initial transmission.

[Equation 5]

According to an embodiment, the UE is I _MCS for at least one TB in DCI or SCI When the value is greater than a specific value (W = 27 or 28), the instantaneous data rate condition of Equation 2 may be utilized to determine a subsequent operation method. In the present invention, the instantaneous data rate condition may be used in the same manner as the above-described scheduling constraint condition.

In the above and below embodiments, _{a specific value for comparison with I MCS} may be determined to be 27 or 28 according to a setting for which MCS table to be used. For example, the specific value may be determined according to an upper layer parameter mcs-Table value or mcs-Table-SL value in a setting related to PDSCH transmission, PUSCH transmission, PSSCH transmission/reception, or SPS transmission, for example as 'qam256' If set, the specific value may be 27, and in other cases, it may be 28.

For the receiving terminal, in the above, J may be the total number of PSSCHs received by the terminal in one slot.

In the sidelink operation, the receiving terminal may select J so that Equation 5 is satisfied, and at this time, it may select J from among all received PSSCHs in order of high QoS, that is, in order of high priority. When QoS is the same, the receiving terminal may arbitrarily select a PSSCH (from among PSSCHs of the same priority). Alternatively, the receiving terminal may determine J in ascending order of the lowest (or highest or central) PRB index among PRBs to which the PSSCH is mapped in selecting J. Alternatively, the receiving terminal may determine J PSSCHs in descending order.

According to an embodiment, according to the length of the symbol number (L) of the retransmission PDSCH or PSSCH scheduled by DCI or SCI, and/or (and/or) the number of symbols (L) of the retransmission PDSCH or PSSCH and the initial transmission PDSCH or PSSCH Whether to use the instantaneous data rate condition of Equation (2) may be determined according to the comparison result of the number of symbols (L') of .

According to an embodiment, the UE has a symbol number (L) of a retransmission PDSCH or PSSCH scheduled by DCI or SCI is less than a specific number (eg, L < 7), and I _MCS value for at least one TB in DCI or SCI is When it is greater than a specific value ( W = 27 or 28), the instantaneous data rate condition of Equation 2 may be used to determine a subsequent operation method. The UE indicates that the number of symbols (L) of the retransmission PDSCH or PSSCH is equal to or greater than a specific number (eg, L >= 7), and the I _MCS value for at least one TB in DCI or SCI is a specific value ( W = 27 or 28) ), the scheduled PDSCH or PSSCH may be processed without checking whether the instantaneous data rate condition of Equation 2 is satisfied.

According to an embodiment, the UE has a smaller number of symbols (L) of the retransmission PDSCH or PSSCH scheduled by DCI or SCI than the number of initial transmission PDSCH or PSSCH symbols (L′) (ie, L < L′), within DCI or SCI. I _MCS for at least one TB When the value is greater than a specific value (W = 27 or 28), the instantaneous data rate condition of Equation 2 may be utilized to determine a subsequent operation method. The UE indicates that the number of symbols (L) of the retransmission PDSCH or PSSCH is greater than or equal to the number of symbols (L′) of the initial transmission PDSCH or PSSCH (ie, L >= L′, I _MCS value for at least one TB in DCI or SCI) If it is greater than this specific value ( W = 27 or 28), the scheduled PDSCH or PSSCH may be processed without checking whether the instantaneous data rate condition of Equation 2 is satisfied.

According to an embodiment, the UE has a smaller number of symbols (L) of a retransmission PDSCH or PSSCH scheduled by DCI or SCI than an initial transmission PDSCH or PSSCH symbol number (L′) and a specific number (eg, 7) (ie, L < 7 and L <L', I _{MCS for at least one TB in DCI} When the value is greater than a specific value (W = 27 or 28), the instantaneous data rate condition of Equation 2 may be utilized to determine a subsequent operation method. The terminal is the number of symbols (L) of the retransmission PDSCH or PSSCH is greater than or equal to an initial specific number, or the number of symbols (L') of the initial transmission PDSCH or PSSCH is greater than (ie, L >= 7 or L >= L'), at least in DCI If the I _MCS value for one TB is greater than a specific value ( W = 27 or 28), the scheduled PDSCH or PSSCH may be processed without checking whether the instantaneous data rate condition of Equation 2 is satisfied.

According to an embodiment, the terminal is smaller than the minimum value of the number of symbols (L) of the retransmission PDSCH or PSSCH scheduled by DCI or SCI (L') and a specific number (eg, 7) ( That is, L < min(7, L'), I _{MCS for at least one TB in DCI or SCI} When the value is greater than a specific value (W = 27 or 28), the instantaneous data rate condition of Equation 2 may be utilized to determine a subsequent operation method. The terminal indicates that the number of symbols (L) of the retransmission PDSCH or PSSCH is greater than or equal to the minimum value of the initial transmission PDSCH or PSSCH symbol number (L') and a specific number (eg, 7) (ie, L >= min(7, L') )), if the I _MCS value for at least one TB in the DCI or SCI is greater than a specific value ( W = 27 or 28), the scheduled PDSCH or PSSCH without checking whether the instantaneous data rate condition of Equation 2 is satisfied can be processed

According to an embodiment, the UE has a smaller number of symbols (L) of the retransmission PDSCH or PSSCH scheduled by DCI or SCI than the difference between the number of initial transmission PDSCH or PSSCH symbols (L′) and the specific number of symbols (x) (that is, L <L'-x), I _MCS for at least one TB in DCI or SCI When the value is greater than a specific value (W = 27 or 28), the instantaneous data rate condition of Equation 2 may be utilized to determine a subsequent operation method. The UE indicates that the number of symbols (L) of the retransmission PDSCH or PSSCH is greater than or equal to the difference between the number of symbols of the initial transmission PDSCH or PSSCH (L') and the specific number of symbols (x) (ie, L >= L'-x), DCI Alternatively, if the I _MCS value for at least one TB in the SCI is greater than a specific value ( W = 27 or 28), the scheduled PDSCH or PSSCH may be processed without checking whether the instantaneous data rate condition of Equation 2 is satisfied. . The x value can be applied as a fixed value such as 2 or 3. Alternatively, the x value may be a value that the base station separately sets as higher signaling.

According to an embodiment, the UE may include punctured symbols in determining the number of symbols (L) of the retransmission PDSCH or PSSCH scheduled by DCI or SCI.

According to an embodiment, the UE may determine the number of symbols (L) of the retransmission PDSCH or PSSCH scheduled by DCI or SCI by excluding punctured symbols.

The above embodiments can also be applied to PUSCH in the same way. The above embodiments can also be applied to a physical sidelink shared channel (PSSCH) in the same way.

[Eighth embodiment]

14 is a diagram illustrating an operation of a terminal for downlink reception or sidelink transmission/reception according to an embodiment of the present invention.

According to an embodiment, the UE may perform PDCCH (or PSCCH, equally applicable to the cases of FIGS. 14 to 20 below) monitoring in a predetermined resource ( 1410 ).

The UE decodes the DCI transmitted from the base station through the PDCCH (or the SCI transmitted from another UE through the PSCCH, the same applies to the cases of FIGS. 14 to 20 below), and whether it is necessary to check whether the instantaneous data rate condition is satisfied can be checked. If it is necessary to check whether the instantaneous data rate condition is satisfied, it can be checked whether the PDSCH or PSSCH scheduled by the corresponding DCI satisfies the instantaneous data rate condition described above ( 1420 ).

If the instantaneous data rate condition is satisfied, the UE may receive the scheduled PDSCH or transmit/receive the PSSCH ( 1430 ).

If the instantaneous data rate condition is not satisfied, the UE may not perform an operation for receiving a scheduled PDSCH or an operation for transmitting and receiving a PSSCH ( 1440 ). The UE may stop the PDSCH or PSSCH buffering or may not perform the PDSCH or PSSCH buffering operation. In the case of a terminal transmitting the PSSCH, if the instantaneous data rate condition is not satisfied, the generation of the PSSCH may be stopped or the generation operation may not be performed. (not shown)

[Example 9]

15 is another diagram illustrating an operation of a terminal for downlink reception or sidelink transmission/reception according to an embodiment of the present invention.

According to another embodiment, the UE may perform PDCCH monitoring on a predetermined resource (1510).

The UE may decode the DCI transmitted from the base station through the PDCCH and check whether it is necessary to check whether the instantaneous data rate condition described above is satisfied. If it is necessary to check whether the instantaneous data rate condition is satisfied, it can be checked whether the PDSCH or PSSCH scheduled by the corresponding DCI satisfies the instantaneous data rate condition (1520).

If the instantaneous data rate condition is satisfied, the UE may perform an operation of receiving the scheduled PDSCH or transmitting/receiving the PSSCH (1530).

If the instantaneous data rate condition is not satisfied, the UE buffers the PDSCH or PSSCH (that is, the information value of the PDSCH or PSSCH is stored in the buffer), and when the PDSCH or PSSCH corresponds to retransmission, stored in the soft buffer according to the HARQ scheme. Based on log likelihood ratio (LLR) information corresponding to the PDSCH or PSSCH, a CC (chase combining) combining may be performed or an IR (incremental redundancy) combining may be performed ( 1540 ). When the energy or SNR of the buffered or combined result value satisfies a specific condition, the UE may start the decoding process. Alternatively, the terminal may start the decoding process after performing combining more than a certain number of times, that is, after receiving retransmissions more than a certain number of times.

[Example 10]

16 is another diagram illustrating an operation of a terminal for downlink reception or sidelink transmission/reception according to an embodiment of the present invention.

According to another embodiment, the UE may perform PDCCH monitoring on a predetermined resource or a configured resource.

The UE may decode the DCI delivered from the base station through the PDCCH and check whether it is necessary to check whether the instantaneous data rate condition is satisfied. If it is necessary to check whether the instantaneous data rate condition is satisfied, it can be checked whether the PDSCH or PSSCH scheduled by the corresponding DCI satisfies the instantaneous data rate condition (1620).

If the instantaneous data rate condition is satisfied, the UE may perform an operation of receiving the scheduled PDSCH (1630).

If the instantaneous data rate condition is not satisfied, the UE may buffer the received PDSCH or PSSCH ( 1641 ) and check whether PDSCH or PSSCH resources are punctured ( 1642 ). For example, the UE may be configured with at least one RNTI through RRC signaling, and a specific RNTI may be used to indicate whether a pre-allocated PDSCH or PSSCH resource is punctured. For example, this RNTI may be an INT-RNTI.

When such an RNTI is configured, the UE may store only the LLR value of the data portion delivered to the non-punctured resource in the soft buffer according to the HARQ scheme and perform CC combining or IR combining (1643). The UE may start the decoding process when the energy or SNR of the combined result satisfies a specific condition. Alternatively, the terminal may start the decoding process after performing combining more than a certain number of times, that is, after receiving retransmissions more than a certain number of times. The UE does not consider (or discards) the value according to the signal transmitted from the punctured resource.

[Example 11]

17 and 18 are other diagrams illustrating an operation of a terminal for downlink reception or PSSCH transmission/reception according to an embodiment of the present invention.

According to another embodiment, the UE may perform PDCCH monitoring in a predetermined resource or in a configured resource (1710). The UE may perform an operation of receiving the scheduled PDSCH or PSSCH through DCI delivered through the PDCCH once without checking whether the PDSCH or PSSCH length is classified and/or whether the instantaneous data rate condition is satisfied. There is (1720). In addition, the UE may determine a resource (frequency, timing) to which the HARQ-ACK information will be transmitted through the delivered DCI.

The UE may set HARQ-ACK information corresponding to the corresponding PDSCH or PSSCH as NACK before decoding the PDSCH (1730).

And the UE may check whether the HARQ-ACK update timing has arrived (1740). The UE may determine the HARQ-ACK update timing according to the position on the time axis of the HARQ-ACK transmission PUCCH resource. For example, the HARQ-ACK update timing is a predetermined time from the start time of the first symbol of the HARQ-ACK transmission PUCCH resource (eg, PUCCH generation time for HARQ-ACK transmission, which can be determined by the capability of the UE) There) may be a viewpoint located in front of it. The terminal may determine the deadline and determine whether the deadline has been reached.

When the HARQ-ACK update timing is reached, when the PDSCH or PSSCH decoding is completed, the UE may update the corresponding HARQ-ACK information based on the result ( 1750 ). For example, when the PDSCH or PSSCH decoding is successful, the UE may update the corresponding HARQ-ACK information to ACK. If PDSCH or PSSCH decoding is completed before HARQ-ACK information transmission timing and HARQ-ACK information is updated, the UE transmits the updated information as HARQ-ACK information, and PDSCH or PSSCH decoding is not completed until HARQ-ACK transmission timing. -If the ACK information is not updated, the preset HARQ-ACK information (ie, NACK information) may be transmitted.

Meanwhile, referring to FIG. 18 , if the PDSCH or PSSCH decoding is not completed, the UE may continue decoding even though the HARQ-ACK information transmission time has passed ( 1810 ).

The UE checks whether the PDSCH or PSSCH decoding is successful ( 1820 ), and if the decoding is successful, the network does not process the data retransmitted by the PDSCH or another UE through the PSSCH (according to DCI scheduling retransmission). ACK may be transmitted in the designated HARQ-ACK information transmission resource (1830). If decoding is not successful, the UE may continue the decoding process after performing CC combining or IR combining according to the HARQ scheme determined or designated based on data that the network retransmits through the PDSCH or another UE through the PSSCH ( 1840).

According to another embodiment, the UE may perform PDCCH monitoring in a predetermined resource or in a configured resource.

The UE may decode the DCI transmitted through the PDCCH to determine whether it is necessary to check whether the instantaneous data rate condition is satisfied. And, if it is necessary to check whether the instantaneous data rate condition is satisfied, it can be determined whether the PUSCH or PSSCH scheduled by the corresponding DCI satisfies the instantaneous data rate condition.

If the instantaneous data rate condition is satisfied, the UE may perform an operation of transmitting the scheduled PUSCH or PSSCH. If the instantaneous data rate condition is not satisfied, the UE may not perform a preparation operation (eg, data preparation according to the HARQ scheme) for transmitting the scheduled PUSCH or PSSCH. (not shown)

According to another embodiment, the UE may perform PDCCH monitoring in a predetermined resource or in a configured resource.

A UE prepares to transmit a PUSCH or PSSCH scheduled through DCI once delivered through a PDCCH without discrimination according to the length of the PUSCH or PSSCH and/or checking whether the instantaneous data rate condition is satisfied (an example) At least one of data preparation, scrambling, modulation, etc.) according to the HARQ scheme may be performed.

The UE may determine a resource (frequency, timing) to which the PUSCH or PSSCH will be transmitted based on DCI. If preparation for PUSCH or PSSCH transmission is completed before the PUSCH transmission timing, the UE may perform PUSCH or PSSCH transmission on the scheduled PUSCH or PSSCH resource, and if not completed, the UE may stop the PUSCH or PSSCH transmission preparation operation. (not shown)

According to another embodiment, the base station may perform an operation for receiving the PUSCH from resources (frequency, timing) scheduled to the terminal through DCI transmitted through the PDCCH.

The base station may perform an operation for detecting DMRS in the scheduled resource. If DMRS is detected, the base station may continue the operation for receiving PUSCH data, and if DMRS is not detected, the base station may not perform the operation for receiving PUSCH data. (not shown)

[Embodiment 12]

19 is a diagram illustrating an operation of a base station according to an embodiment of the present invention.

The base station may determine at least one of a frequency band to be used, a bandwidth of a carrier to be used in the frequency band, and a subcarrier interval to be used ( 1910 ). In addition, the base station may determine for each terminal an upper parameter (eg, an RRC parameter) related to an initially accessed terminal, a newly RRC-configured terminal, a terminal in which a change (eg, an RRC parameter) has occurred, and a terminal in which an exchange of UE capability has occurred. .

The base station may calculate the maximum data rate for each terminal by using the above parameters and Equation (1). The base station may calculate each maximum data rate according to the communication counterpart of the terminal, that is, whether the terminal transmits/receives data to/from the base station or if the terminal transmits/receives data to/from another terminal ( 1920 ).

Also, the base station may calculate a TBS_threshold value (1930). In this case, the criterion for calculating TBS_threshold may be calculated based on at least one of information related to a specific resource size, such as a specific resource size, for example, the number of symbols of a specific length. An example of another parameter for calculating TBS_threshold may be the number of symbols included in one slot.

20A is another diagram illustrating an operation of a base station according to an embodiment of the present invention.

Scheduling for initial transmission or decoding for initial transmission fails, so scheduling for retransmission may be required. In this case, the base station may determine a terminal requiring such scheduling (2010).

The base station may determine the MCS of the scheduling terminal based on the determined channel state information (CSI) of the terminal (2020).

Then, the base station may check the TBS_Threshold determined for each terminal ( 2030 ), and determine the size of the scheduling resource of the terminal based on the TBS_Threshold ( 2040 ).

20B is a diagram illustrating an embodiment in which a base station determines a scheduling resource of a terminal according to an embodiment of the present invention.

According to an embodiment of determining the scheduling resource of the terminal, the base station may determine the minimum scheduling unit resource (2041). The minimum scheduling unit resource may be N (N=1, 2, 3...) RBs.

The base station may apply the minimum scheduling unit resource N differently according to a given situation. For example, the minimum scheduling unit resource may be one RB. The base station may compare whether the TBS_Threshold of the terminal is satisfied at this time while adding the minimum scheduling unit resource, for example, by adding one RB ( 2043 ).

If TBS_Threshold is satisfied during comparison (ie, when TBS calculated based on the scheduled RB is smaller than TBS_Threshold), the base station may additionally allocate a minimum scheduling unit resource ( 2045 ). If TBS_Threshold is not satisfied (ie, when TBS calculated based on the scheduled RB is equal to or greater than TBS_Threshold), the UE may determine the number of scheduling unit resources ( 2047 ).

According to another embodiment of determining the scheduling resource of the terminal, the base station may pre-calculate a TBS value corresponding to the number of minimum scheduling unit resources and store the TBS value in a table. Therefore, it is possible to determine the number of scheduling unit resources that satisfy the TBS_Threshold value without the need to calculate while adding scheduling unit resources.

The base station may determine whether the determined scheduling resource size is available in the corresponding slot. That is, it may be determined whether a scheduling resource of a determined size can be included in a corresponding slot. If available, resource allocation to the corresponding terminal is finally determined, and DCI or SCI corresponding thereto can be transmitted to the corresponding terminal through the PDCCH. If it is not available, the base station finally decides not to allocate resources in the corresponding slot to the corresponding terminal, or changes to allocating only the available resources to the corresponding terminal and transmits the corresponding DCI or SCI to the corresponding terminal through the PDCCH. can

Although examples of PDSCH transmission have been described in the above embodiments, this may also be applied to PUSCH transmission or PSSCH transmission. In this case, the base station configuration information and terminal capability information related to downlink transmission used in the above embodiments may be applied by changing the base station configuration information and terminal capability information related to uplink transmission.

[Thirteenth embodiment]

The thirteenth embodiment provides a method for determining a data rate according to a band or a combination of bands used by the terminal for communication.

The maximum data rate of the sidelink of the terminal can be calculated as described in the first embodiment, the 1-1 embodiment, the 1-2 embodiment, the 1-3 embodiment, etc. of the present invention, and the capability of the terminal can be determined according to In particular, the value of f, which is a scaling factor, can be determined as described above again below.

is the scaling factor given by higher layer parameter scalingFactor and can take the values 1, 0.8, 0.75, and 0.4.

is the scaling factor given by higher layer parameter scalingFactor and can take the values 1, 0.8, 0.75, and 0.4.

This can be determined according to the upper signaling scalingFactor parameter, and the parameter can be determined as one of 0.8, 0.75, and 0.4 (this does not limit the case where a new value is added), and if not set or not reported, 1 can be considered as

However, the scalingFactor parameter may be a parameter value that the terminal reports to the base station, or reports or delivers to neighboring terminals. This may vary depending on a frequency band or a combination of frequency bands supported by the UE, and may be transmitted, for example, by one of the following methods or a combination of the following methods.

- Method 1: per Uu band combination

- Method 2: per-PC5-band-combination

- Method 3: per-Uu-band-combination-and-per-PC5-band-combination

- Method 4: per-PC5-band

For example, when method 1 is used (Uu band 1, Uu band 2), when each combination is (band 3, band 5), the f values may be set to 0.4 and 0.75. In the case of a combination of different bands, the f-value may be different even for bands with the same number.

In the case of using the method 3 above, the baseband processing capability that the UE can use in the PC5 band may vary depending on whether the UE is activated in the Uu band performing an operation such as DL or UL. Also on the contrary, depending on whether the UE activates the PC5 band, that is, whether the UE is performing a sidelink operation or not, or whether the UE activates the V2X function, the UE performs an operation such as DL or UL Uu band The available baseband processing capacity may vary. That is, since the baseband processing capability that the UE can really use varies depending on whether the Uu and PC5 bands are activated, the f value (used for calculating the data rate) that the UE should apply needs to be different. Even in the case of scheduling DL and UL data transmission to the terminal from the standpoint of the base station, depending on whether the terminal activates the PC5 band, that is, whether the terminal is performing a sidelink operation or not, or whether the terminal activates the V2X function , DL and UL data scheduling methods may need to be changed. That is, the maximum DL TBS or the maximum UL TBS that the base station can schedule to the terminal may be determined by whether the terminal performs a sidelink operation. For example, the maximum TBS schedulable in DL or UL to the terminal may vary depending on whether the terminal is performing a sidelink operation. For example, if the UE is performing sidelink operation in PC5 band, the maximum TBS that can be scheduled in DL or UL may be small, and conversely, if the UE is not performing sidelink operation in PC5 band, the maximum schedulable in DL or UL TBS may become large. However, since the base station does not know whether the terminal is performing a sidelink operation in the PC5 band, it may not know how to perform scheduling.

In order to solve the above problems, the following methods may be considered.

- Method X1: The terminal may transmit information (eg, a list of bands) of the PC5 band or PC5 band combination currently being activated by the terminal to the base station. This may be transmitted through higher signaling (RRC signaling, UE capability).

- Method X2: The base station may deliver information on a band combination currently applied to the terminal for scheduling to the terminal. This may be set to the terminal as configuration information. That is, the base station is a method of setting a band combination applied to the corresponding terminal. The configured band combination may be one of those included in the UE capability reported by the terminal to the base station.

- Method X3: If the PC5 band is included in the band combination reported by the UE as UE capability, the base station may perform scheduling to the UE assuming that the UE always activates the PC5 band. For example, when the UE reports the n71 band and also reports the n71-n47 band combination, if the base station schedules the UE in the n71 band, consider the scalingFactor reported by the UE for the n71-n47 band combination. Thus, DL and UL scheduling can be performed, and scheduling can be performed within the maximum TBS suitable for this.

- Method X4: The terminal may transmit information on the currently active Uu band or Uu band combination to other nearby terminals. This may be transmitted through higher signaling (RRC signaling, UE capability).

- Method X5: When the terminal performs data transmission in the sidelink, it is assumed that the capability of the neighboring terminal is the smallest possible value (0.4 in the example above) of the snailingFactor value in the corresponding sidelink band, and the sidelink TBS is used. Create and send data.

- Method X6: The UE may determine whether to receive DL data (PDSCH) and transmit UL data (PUSCH) scheduled by the base station differently depending on whether it is currently performing PC5 operation. That is, when the UE reports f = 1 (or may not report an f value) for the n71 band, and reports the scaling value in n71 as f = 0.75 for the band combination of n71-n47 , when the UE is performing transmission/reception or a related operation in the sidelink band of n47, the maximum data in n71 calculated on the basis of f=0.75 whether DL data (PDSCH) and UL data (PUSCH) are transmitted in n71 judged on the basis of the rate. Conversely, in the above example, if the terminal is not performing transmission/reception or a related operation in the sidelink band of n47, whether to transmit DL data (PDSCH) and UL data (PUSCH) in n71 is calculated based on f=1. It is judged based on the maximum data rate of the n71. Also, conversely, in the case of the sidelink, the f value of the sidelink required in the sidelink data rate to be calculated when determining whether to transmit/receive the sidelink data PSSCH may be differently determined depending on whether the operation is performed in the Uu band.

The maximum data rate may be calculated, for example, as given in Equation 1 above, based on the capability of the terminal reported to the base station and parameters set by the base station through RRC signaling to the terminal. The maximum data rate of the terminal may be determined based on the baseband processing or signal processing capability of the terminal, including channel estimation, equalization, channel code decoding, multi-antenna reception, and the like. That is, when the maximum data rate of a certain terminal is high, it can be seen that the signal processing capability of the corresponding terminal is high. The terminal may calculate a 'maximum data rate' for communication with the base station and a 'maximum data rate' for communication with the terminal, respectively. Different values may be used for at least one parameter used when calculating the 'maximum data rate' depending on the communication counterpart. The parameter may include at least a parameter such as f that is a scalingFactor.

The operation of the terminal performing the present embodiment may be as follows as an example. For the operation of the terminal, all the described operations do not have to be performed, and one or more of the operations described below may be performed and may be performed in a different order.

The terminal may transmit its capability information to the base station. The capability information may include information on a band combination of a Uu band and a PC5 band that can coexist (which the UE can support). Thereafter, the terminal reports to the base station whether the terminal is operating the sidelink (or whether the terminal is performing a sidelink operation, whether the terminal has activated the V2X function, etc.) to the base station (this process is optionally can be done). Thereafter, the base station may schedule signal transmission/reception to the terminal in consideration of the capability information of the terminal. The terminal uses the scaling factor parameter set according to the present embodiment according to the sidelink operation reported or determined according to the contents of this embodiment, and uses the 'maximum data rate' for communication with the base station and/or for communication with the terminal. The 'maximum data rate' for each can be calculated. Thereafter, the terminal may determine whether to transmit/receive a signal or perform transmission/reception with a base station and/or another terminal based on the calculated maximum data rate.

A transmitter, a receiver, and a processor of the terminal and the base station for performing the embodiments of the present disclosure are illustrated in FIGS. 21 and 22, respectively. In order to calculate an actual data rate and perform a transmission/reception method according to at least one of various embodiments, a receiving unit, a processing unit, and a transmitting unit of the base station and the terminal may operate according to the above-described embodiments, respectively.

21 is a block diagram of a terminal according to an embodiment of the present invention.

21 , the terminal of the present disclosure may include a terminal receiving unit 21-00, a terminal transmitting unit 21-04, and a terminal processing unit 21-02. The terminal receiving unit 21-00 and the terminal transmitting unit 21-04 may be collectively referred to as a transceiver in the present disclosure. The transceiver may transmit/receive a signal to/from a base station or another terminal. Here, the signal may include control information and data. To this end, the transceiver may include an RF transmitter for up-converting and amplifying a frequency of a transmitted signal, and an RF receiver for low-noise amplifying and down-converting a received signal.

In addition, the transceiver may receive a signal through the wireless channel and output the signal to the terminal processing unit 21-02, and transmit the signal output from the terminal processing unit 21-02 through the wireless channel. The terminal processing unit 21-02 may control a series of processes so that the terminal may operate according to the above-described embodiment of the present disclosure. For example, the terminal receiving unit 21-00 receives control information and data including scheduling information for data transmission from a base station or another terminal, and the terminal processing unit 21-02 receives the terminal's peak data rate and scheduled data. By comparing the amount of data, decoding and transmission may be determined, and signal processing may be performed accordingly. Thereafter, signals that need to be transmitted by the terminal transmitter 21-04 may be transmitted to a base station or another terminal.

22 is a block diagram of a base station according to an embodiment of the present invention.

22 , the base station of the present disclosure may include a base station receiving unit 22-01, a base station transmitting unit 22-05, and a base station processing unit 22-03. The base station receiving unit 22-01 and the base station transmitting unit 22-05 may be collectively referred to as a transceiver in the present disclosure. The transceiver may transmit/receive a signal to/from the terminal. Here, the signal may include control information and data. To this end, the transceiver may include an RF transmitter for up-converting and amplifying a frequency of a transmitted signal, and an RF receiver for low-noise amplifying and down-converting a received signal. In addition, the transceiver may receive a signal through a wireless channel and output it to the base station processing unit 22-03, and transmit the signal output from the base station processing unit 22-03 through a wireless channel.

The base station processing unit 22-03 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 base station processing unit 22-03 calculates the peak data rate of the terminal according to the communication counterpart of the terminal, determines the TBS in a range that does not exceed the peak data rate, and performs scheduling to generate control information. have.

Thereafter, the control information generated by the base station transmitter 22-05 may be transmitted, and the base station receiver 22-01 may receive a feedback or uplink data signal from the terminal.

The present invention for solving the above problems is a method of a terminal in a wireless communication system, the method comprising: monitoring a physical downlink control channel (PDCCH); control information: determining whether a scheduling constraint is determined based on DCI Checking whether a constraint condition is satisfied; if the scheduling restriction condition is satisfied, receiving data from the base station through the PDSCH.

The terminal of the present invention for solving the above problems monitors a transceiver and a physical downlink control channel (PDCCH), and downlink control information decoded as a result of the monitoring (DCI) checks whether a scheduling constraint is determined based on and a controller for receiving data from the base station through the PDSCH when the scheduling restriction condition is satisfied.

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 included in each embodiment within a range that does not impair the essence of the invention.

On the other hand, the embodiments of the present invention disclosed in the present specification and drawings are merely presented as specific examples to easily explain the technical contents of the present invention and help the understanding of the present invention, and are not intended to limit the scope of the present invention. That is, it will be apparent to those of ordinary skill in the art to which the present invention pertains that other modifications are possible based on the technical spirit of the present invention. In addition, each of the above embodiments may be operated in combination with each other as needed. For example, it may be possible that the first embodiment and the second embodiment are applied in combination, or that a part of the first embodiment and a part of the second embodiment are applied in combination. In addition, the above embodiments may be implemented in other modifications based on the technical idea of the embodiment, such as LTE system, 5G system.

Claims (1)

A control signal processing method in a wireless communication system, comprising:
receiving a first control signal transmitted from a base station;
processing the received first control signal; and
and transmitting a second control signal generated based on the processing to the base station.

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