WO2022025498A1

WO2022025498A1 - Method for performing channel access procedure and device therefor

Info

Publication number: WO2022025498A1
Application number: PCT/KR2021/009155
Authority: WO
Inventors: 명세창; 양석철; 김선욱; 배덕현
Original assignee: 엘지전자 주식회사
Priority date: 2020-07-30
Filing date: 2021-07-16
Publication date: 2022-02-03

Abstract

The present disclosure provides a method for transmitting an uplink signal by a terminal in a wireless communication system. Specifically, the method comprises: on the basis of first channel access parameter entries for a first downlink control information (DCI) format, obtaining second channel access parameter entries for a second DCI format; receiving DCI including information relating to one second channel access parameter entry among the second channel access parameter entries; on the basis of the one second channel access parameter entry, performing a channel access procedure (CAP); and transmitting the uplink signal on the basis of the result of the CAP, wherein the DCI has the second DCI format.

Description

Method for performing channel access procedure and apparatus therefor

The present disclosure (disclosure) relates to a method and an apparatus for performing a channel access procedure, and more particularly, URLLC (ultra-reliable low-latency communications) through a DCI format in which a bit width can be varied. ) Indicating a channel access parameter for transmission, and to a method and an apparatus for the same for performing a channel access procedure based on this.

As more and more communication devices require greater communication traffic according to the flow of time, a next-generation 5G system, which is a wireless broadband communication that is improved compared to the existing LTE system, is required. In this next-generation 5G system, called NewRAT, communication scenarios are divided into Enhanced Mobile BroadBand (eMBB)/ Ultra-reliability and low-latency communication (URLLC)/Massive Machine-Type Communications (mMTC).

Here, eMBB is a next-generation mobile communication scenario with characteristics such as High Spectrum Efficiency, High User Experienced Data Rate, and High Peak Data Rate, and URLLC is a next-generation mobile communication scenario with characteristics such as Ultra Reliable, Ultra Low Latency, and Ultra High Availability. (eg, V2X, Emergency Service, Remote Control), and mMTC is a next-generation mobile communication scenario with Low Cost, Low Energy, Short Packet, and Massive Connectivity characteristics. (e.g., IoT).

An object of the present disclosure is to provide a method for performing a channel access procedure and an apparatus therefor.

The technical problems to be achieved in the present disclosure are not limited to the technical problems mentioned above, and other technical problems not mentioned will be clearly understood by those of ordinary skill in the art to which the present disclosure belongs from the description below. will be able

In a method for a terminal to transmit an uplink signal in a wireless communication system according to an embodiment of the present disclosure, based on first channel access parameter entries for a first DCI (Downlink Control Information) format, the second Obtaining second channel connection parameter entries for a DCI format, receiving a DCI including information about a second channel connection parameter entry of any one of the second channel connection parameter entries, 2 Based on the channel access parameter entry, a channel access procedure (Channel Access Procedure; CAP) is performed, and the uplink signal is transmitted based on the CAP result, wherein the DCI is the second DCI format can

In this case, each of the first channel access parameter entries and the second channel access parameter entries is a first value for a CAT (Channel Access Type), a second value for a CPE (Cyclic Prefix Extension), and a CAPC (Channel Access Type). A third value for Access Priority Class) may be included.

The method may further include receiving the first channel access parameter entries through a higher layer.

Also, the second channel access parameter entries may be obtained based on the number of bits for the second channel access parameter included in the second DCI format.

Also, a priority for the first channel access parameter entries may be the same as a priority for the second channel access parameter entries.

Also, based on the fact that the number of bits for the second channel access parameter included in the second DCI format is 0, the one second channel access parameter entry may be preset.

In the wireless communication system according to the present disclosure, a terminal for transmitting an uplink signal, comprising: at least one transceiver; at least one processor; and at least one memory operatively coupled to the at least one processor and storing instructions that, when executed, cause the at least one processor to perform an operation, the operation comprising: a first DCI ( Downlink Control Information) obtains second channel access parameter entries for a second DCI format based on first channel access parameter entries for the format, and through the at least one transceiver, the second channel access parameter Receive a DCI, including information on any one of the second channel access parameter entries, among the entries, and based on the one of the second channel access parameter entries, perform a Channel Access Procedure (CAP) and transmitting the uplink signal based on the CAP result through the at least one transceiver, wherein the DCI may be in the second DCI format.

In the wireless communication system according to the present disclosure, an apparatus for transmitting an uplink signal, comprising: at least one processor; and at least one memory operatively coupled to the at least one processor and storing instructions that, when executed, cause the at least one processor to perform an operation, the operation comprising: a first DCI ( Downlink Control Information) obtains second channel access parameter entries for a second DCI format based on first channel access parameter entries for the format, and among the second channel access parameter entries, Receives DCI, including information on two channel access parameter entries, based on any one of the second channel access parameter entries, performs a Channel Access Procedure (CAP), and based on the CAP result It is characterized in that the uplink signal is transmitted in a

A computer-readable storage medium including at least one computer program for causing at least one processor to perform an operation according to an embodiment of the present disclosure, the operation comprising: a first channel for a first Downlink Control Information (DCI) format Obtains second channel access parameter entries for a second DCI format based on access parameter entries, and includes information about any one of the second channel access parameter entries among the second channel access parameter entries , receiving DCI, performing a channel access procedure (CAP) based on the one of the second channel access parameter entries, and transmitting the uplink signal based on the CAP result However, the DCI may be the second DCI format.

According to the present disclosure, even if the bit size of DCI for a communication system requiring high reliability and low latency, such as URLLC, is variably operated, it is possible to efficiently instruct a channel access parameter to the terminal.

The effects obtainable in the present disclosure are not limited to the above-mentioned effects, and other effects not mentioned may be clearly understood by those of ordinary skill in the art to which the present disclosure belongs from the description below. will be.

1 illustrates physical channels used in a 3GPP system, which is an example of a wireless communication system, and a general signal transmission method using the same.

2 illustrates the structure of a radio frame.

3 illustrates a resource grid of slots.

4 shows an example in which a physical channel is mapped in a slot.

5 illustrates a Physical Uplink Shared Channel (PUSCH) transmission process.

6 illustrates an uplink transmission operation of a terminal.

7 illustrates repeated transmission based on a configured grant.

8 is a diagram illustrating a wireless communication system supporting an unlicensed band applicable to the present disclosure.

9 illustrates a method of occupying a resource within an unlicensed band applicable to the present disclosure.

10 illustrates a channel access procedure of a terminal for uplink and/or downlink signal transmission in an unlicensed band applicable to the present disclosure.

11 is a view for explaining a plurality of LBT-SB (Listen Before Talk - Subband) applicable to the present disclosure.

12 is a diagram for explaining a resource block (RB) interlace applicable to the present disclosure.

13 is a diagram for explaining a resource allocation method for uplink transmission in a shared spectrum applicable to the present disclosure.

14 to 15 are diagrams for explaining a preemption indication in ultra-reliable low-latency communications (URLLC) transmission applicable to the present disclosure.

16 to 18 are diagrams for explaining overall operation processes of a terminal, a base station, and a network according to an embodiment of the present disclosure.

19 illustrates a communication system applied to the present disclosure.

20 illustrates a wireless device applicable to the present disclosure.

21 illustrates a vehicle or an autonomous driving vehicle that may be applied to the present disclosure.

The following technologies include code division multiple access (CDMA), frequency division multiple access (FDMA), time division multiple access (TDMA), orthogonal frequency division multiple access (OFDMA), single carrier frequency division multiple access (SC-FDMA), etc. It can be used in various wireless access systems. CDMA may be implemented with a radio technology such as Universal Terrestrial Radio Access (UTRA) or CDMA2000. TDMA may be implemented with a radio technology such as Global System for Mobile communications (GSM)/General Packet Radio Service (GPRS)/Enhanced Data Rates for GSM Evolution (EDGE). OFDMA may be implemented with a radio technology such as IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802-20, Evolved UTRA (E-UTRA), and the like. UTRA is part of the Universal Mobile Telecommunications System (UMTS). 3GPP (3rd Generation Partnership Project) long term evolution (LTE) is a part of Evolved UMTS (E-UMTS) using E-UTRA, and LTE-A (Advanced) is an evolved version of 3GPP LTE. 3GPP NR (New Radio or New Radio Access Technology) is an evolved version of 3GPP LTE/LTE-A.

For clarity of explanation, description is based on a 3GPP communication system (eg, NR), but the spirit of the present disclosure is not limited thereto. For backgrounds, terms, abbreviations, etc. used in the description of the present disclosure, reference may be made to matters described in standard documents published before the present disclosure (eg, 38.211, 38.212, 38.213, 38.214, 38.300, 38.331, etc.).

Now, let's look at 5G communication including the NR system.

The three main requirements areas for 5G are (1) Enhanced Mobile Broadband (eMBB) area, (2) Massive Machine Type Communication (mMTC) area and (3) Ultra-reliable and It includes an Ultra-reliable and Low Latency Communications (URLLC) area.

Some use cases may require multiple areas for optimization, while other use cases may focus on only one key performance indicator (KPI). 5G is to support these various use cases in a flexible and reliable way.

eMBB goes far beyond basic mobile Internet access, covering rich interactive work, media and entertainment applications in the cloud or augmented reality. Data is one of the key drivers of 5G, and for the first time in the 5G era, we may not see dedicated voice services. In 5G, voice is simply expected to be processed as an application using the data connection provided by the communication system. The main causes for increased traffic volume are an increase in content size and an increase in the number of applications requiring high data rates. Streaming services (audio and video), interactive video and mobile Internet connections will become more widely used as more devices connect to the Internet. Many of these applications require always-on connectivity to push real-time information and notifications to users. Cloud storage and applications are rapidly increasing in mobile communication platforms, which can be applied to both work and entertainment. And, cloud storage is a special use case that drives the growth of uplink data rates. 5G is also used for remote work in the cloud, requiring much lower end-to-end latency to maintain a good user experience when tactile interfaces are used. Entertainment For example, cloud gaming and video streaming are other key factors that increase the demand for mobile broadband capabilities. Entertainment is essential on smartphones and tablets anywhere, including in high-mobility environments such as trains, cars and airplanes. Another use example is augmented reality for entertainment and information retrieval. Here, augmented reality requires very low latency and instantaneous amount of data.

Also, one of the most anticipated 5G use cases relates to the ability to seamlessly connect embedded sensors in all fields, namely mMTC. By 2020, the number of potential IoT devices is projected to reach 20.4 billion. Industrial IoT is one of the areas where 5G will play a major role in enabling smart cities, asset tracking, smart utilities, agriculture and security infrastructure.

URLLC includes new services that will transform industries through ultra-reliable/available low-latency links such as self-driving vehicles and remote control of critical infrastructure. This level of reliability and latency is essential for smart grid control, industrial automation, robotics, and drone control and coordination.

Next, a number of usage examples in a 5G communication system including an NR system will be described in more detail.

5G could complement fiber-to-the-home (FTTH) and cable-based broadband (or DOCSIS) as a means of delivering streams rated from hundreds of megabits per second to gigabits per second. This high speed is required to deliver TVs in resolutions of 4K and higher (6K, 8K and higher), as well as virtual and augmented reality. Virtual Reality (VR) and Augmented Reality (AR) applications almost include immersive sporting events. Certain applications may require special network settings. For VR games, for example, game companies may need to integrate core servers with network operators' edge network servers to minimize latency.

Automotive is expected to be an important new driving force for 5G with many use cases for mobile communication to vehicles. For example, entertainment for passengers requires simultaneous high capacity and high mobility mobile broadband. The reason is that future users continue to expect high-quality connections regardless of their location and speed. Another use case in the automotive sector is augmented reality dashboards. It identifies objects in the dark and overlays information that tells the driver about the distance and movement of the object over what the driver is seeing through the front window. In the future, wireless modules will enable communication between vehicles, information exchange between vehicles and supporting infrastructure, and information exchange between automobiles and other connected devices (eg, devices carried by pedestrians). Safety systems can help drivers lower the risk of accidents by guiding alternative courses of action to help them drive safer. The next step will be remote-controlled or self-driven vehicles. This requires very reliable and very fast communication between different self-driving vehicles and between vehicles and infrastructure. In the future, self-driving vehicles will perform all driving activities, allowing drivers to focus only on traffic anomalies that the vehicle itself cannot discern. The technological requirements of self-driving vehicles demand ultra-low latency and ultra-fast reliability to increase traffic safety to unattainable levels for humans.

Smart cities and smart homes, referred to as smart societies, will be embedded with high-density wireless sensor networks. A distributed network of intelligent sensors will identify conditions for cost and energy-efficient maintenance of a city or house. A similar setup can be performed for each household. Temperature sensors, window and heating controllers, burglar alarms and appliances are all connected wirelessly. Many of these sensors are typically low data rates, low power and low cost. However, for example, real-time HD video may be required in certain types of devices for surveillance.

The consumption and distribution of energy, including heat or gas, is highly decentralized, requiring automated control of distributed sensor networks. Smart grids use digital information and communication technologies to interconnect these sensors to gather information and act on it. This information can include supplier and consumer behavior, enabling smart grids to improve efficiency, reliability, economics, sustainability of production and distribution of fuels such as electricity in an automated manner. The smart grid can also be viewed as another low-latency sensor network.

The health sector has many applications that can benefit from mobile communications. The communication system may support telemedicine providing clinical care from a remote location. This can help reduce barriers to distance and improve access to consistently unavailable health care services in remote rural areas. It is also used to save lives in critical care and emergency situations. A wireless sensor network based on mobile communication may provide remote monitoring and sensors for parameters such as heart rate and blood pressure.

Wireless and mobile communications are becoming increasingly important in industrial applications. Wiring is expensive to install and maintain. Thus, the possibility of replacing cables with reconfigurable wireless links is an attractive opportunity for many industries. Achieving this, however, requires that the wireless connection operate with cable-like delay, reliability and capacity, and that its management be simplified. Low latency and very low error probability are new requirements that need to be connected with 5G.

Logistics and freight tracking are important use cases for mobile communications that use location-based information systems to enable tracking of inventory and packages from anywhere. Logistics and freight tracking use cases typically require low data rates but require wide range and reliable location information.

1 is a diagram for explaining physical channels used in a 3GPP system and a general signal transmission method.

In a state in which the power is turned off, the power is turned on again, or a terminal newly entering a cell performs an initial cell search operation such as synchronizing with the base station (S11). To this end, the UE receives a Synchronization Signal Block (SSB) from the base station. The SSB includes a Primary Synchronization Signal (PSS), a Secondary Synchronization Signal (SSS), and a Physical Broadcast Channel (PBCH). The UE synchronizes with the base station based on PSS/SSS and acquires information such as cell identity. In addition, the terminal may receive the PBCH from the base station to obtain the broadcast information in the cell. In addition, the UE may receive a DL RS (Downlink Reference Signal) in the initial cell search step to check the downlink channel state.

After completing the initial cell search, the UE may receive a Physical Downlink Control Channel (PDCCH) and a Physical Downlink Control Channel (PDSCH) corresponding thereto to obtain more specific system information (S12).

Thereafter, the terminal may perform a random access procedure to complete access to the base station (S13 to S16). Specifically, the UE transmits a preamble through a physical random access channel (PRACH) (S13), and receives a random access response (RAR) for the preamble through a PDCCH and a corresponding PDSCH (S14). . Thereafter, the UE transmits a Physical Uplink Shared Channel (PUSCH) by using the scheduling information in the RAR (S15), and may perform a contention resolution procedure such as the PDCCH and the corresponding PDSCH (S16).

When the random access process is performed in two steps, S13/S15 is performed in one step (in which the terminal performs transmission) (message A), and S14/S16 is performed in one step (in which the base station performs transmission). It can be done (message B).

After performing the above procedure, the UE may perform PDCCH/PDSCH reception (S17) and PUSCH/PUCCH (Physical Uplink Control Channel) transmission (S18) as a general uplink/downlink signal transmission procedure. Control information transmitted by the terminal to the base station is referred to as uplink control information (UCI). UCI includes HARQ ACK/NACK (Hybrid Automatic Repeat and reQuest Acknowledgment/Negative-ACK), SR (Scheduling Request), CSI (Channel State Information), and the like. CSI includes a Channel Quality Indicator (CQI), a Precoding Matrix Indicator (PMI), and a Rank Indication (RI). UCI is generally transmitted through PUCCH, but may be transmitted through PUSCH when control information and data are to be transmitted at the same time. In addition, according to a request/instruction of a network, the UE may aperiodically transmit UCI through PUSCH.

2 is a diagram showing the structure of a radio frame.

In NR, uplink and downlink transmission consists of frames. One radio frame has a length of 10 ms, and is defined as two 5 ms half-frames (HF). One half-frame is defined as 5 1ms subframes (Subframe, SF). One subframe is divided into one or more slots, and the number of slots in the subframe depends on subcarrier spacing (SCS). Each slot includes 12 or 14 OFDM(A) symbols according to a cyclic prefix (CP). When CP is usually used, each slot includes 14 symbols. When the extended CP is used, each slot includes 12 symbols. Here, the symbol may include an OFDM symbol (or a CP-OFDM symbol) and an SC-FDMA symbol (or a DFT-s-OFDM symbol).

Table 1 exemplifies that the number of symbols per slot, the number of slots per frame, and the number of slots per subframe vary according to SCS when CP is usually used.

SCS (152^u)SCS (152^u)	NslotsymbNslotsymb	Nframe,uslotNframe, uslot	Nsubframe,uslotNsubframe,uslot
15KHz (u=0)15KHz (u=0)	1414	1010	1One
30KHz (u=1)30KHz (u=1)	1414	2020	22
60KHz (u=2)60KHz (u=2)	1414	4040	44
120KHz (u=3)120KHz (u=3)	1414	8080	88
240KHz (u=4)240KHz (u=4)	1414	160160	1616

* Nslotsymb: the number of symbols in the slot

* Nframe,uslot: number of slots in frame

* Nsubframe,uslot: the number of slots in the subframe

Table 2 illustrates that when the extended CP is used, the number of symbols per slot, the number of slots per frame, and the number of slots per subframe vary according to SCS.

SCS (152^u)SCS (152^u)	NslotsymbNslotsymb	Nframe,uslotNframe, uslot	Nsubframe,uslotNsubframe,uslot
60KHz (u=2)60KHz (u=2)	1212	4040	44

The structure of the frame is merely an example, and the number of subframes, the number of slots, and the number of symbols in the frame may be variously changed. Numerology (eg, SCS, CP length, etc.) may be set differently. Accordingly, the (absolute time) interval of a time resource (eg, SF, slot, or TTI) (commonly referred to as TU (Time Unit) for convenience) composed of the same number of symbols may be set differently between the merged cells.

NR supports multiple numerology (or subcarrier spacing (SCS)) to support various 5G services. For example, when SCS is 15kHz, it supports a wide area in traditional cellular bands, and when SCS is 30kHz/60kHz, dense-urban, lower latency and a wider carrier bandwidth, and when the SCS is 60 kHz or higher, a bandwidth greater than 24.25 GHz to overcome phase noise.

The NR frequency band is defined as two types of frequency ranges (FR1, FR2). FR1 and FR2 may be configured as shown in Table 3 below. In addition, FR2 may mean a millimeter wave (mmW).

Frequency Range designationFrequency Range designation	Corresponding frequency rangeCorresponding frequency range	Subcarrier SpacingSubcarrier Spacing
FR1FR1	450MHz - 7125MHz450MHz - 7125MHz	15, 30, 60kHz15, 30, 60 kHz
FR2FR2	24250MHz - 52600MHz24250MHz - 52600MHz	60, 120, 240kHz60, 120, 240 kHz

3 illustrates a resource grid of slots. One slot includes a plurality of symbols in the time domain. For example, in the case of a normal CP, one slot includes 14 symbols, but in the case of an extended CP, one slot includes 12 symbols. The carrier includes a plurality of subcarriers in the frequency domain. A resource block (RB) is defined as a plurality of (eg, 12) consecutive subcarriers in the frequency domain. A bandwidth part (BWP) is defined as a plurality of consecutive (P)RBs in the frequency domain, and may correspond to one numerology (eg, SCS, CP length, etc.). A carrier may include a maximum of N (eg, 5) BWPs. Data communication is performed through the activated BWP, and only one BWP can be activated for one terminal. Each element in the resource grid is referred to as a resource element (RE), and one complex symbol may be mapped.

4 is a diagram illustrating an example in which a physical channel is mapped in a slot.

A DL control channel, DL or UL data, and a UL control channel may all be included in one slot. For example, the first N symbols in a slot may be used to transmit a DL control channel (hereinafter, DL control region), and the last M symbols in a slot may be used to transmit a UL control channel (hereinafter, UL control region). N and M are each an integer greater than or equal to 0. A resource region (hereinafter, referred to as a data region) between the DL control region and the UL control region may be used for DL data transmission or UL data transmission. A time gap for DL-to-UL or UL-to-DL switching may exist between the control region and the data region. The PDCCH may be transmitted in the DL control region, and the PDSCH may be transmitted in the DL data region. Some symbols at the time of switching from DL to UL in a slot may be used as a time gap.

Hereinafter, each physical channel will be described in more detail.

Downlink Channel Structure

The base station transmits a related signal to the terminal through a downlink channel to be described later, and the terminal receives the related signal from the base station through a downlink channel to be described later.

(1) Physical Downlink Shared Channel (PDSCH)

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

(2) Physical Downlink Control Channel (PDCCH)

The PDCCH carries Downlink Control Information (DCI). For example, PCCCH (ie, DCI) is a transmission format and resource allocation of a downlink shared channel (DL-SCH), resource allocation information for an uplink shared channel (UL-SCH), paging information for a paging channel (PCH), It carries system information on DL-SCH, resource allocation information for higher layer control messages such as random access response transmitted on PDSCH, transmit power control commands, activation/deactivation of CS (Configured Scheduling), and the like. DCI includes a cyclic redundancy check (CRC), and the CRC is masked/scrambled with various identifiers (eg, Radio Network Temporary Identifier, RNTI) according to the owner or use purpose of the PDCCH. For example, if the PDCCH is for a specific terminal, the CRC is masked with a terminal identifier (eg, Cell-RNTI, C-RNTI). If the PDCCH relates to paging, the CRC is masked with a Paging-RNTI (P-RNTI). If the PDCCH relates to system information (eg, System Information Block, SIB), the CRC is masked with a System Information RNTI (SI-RNTI). If the PDCCH relates to a random access response, the CRC is masked with RA-RNTI (Random Access-RNTI).

The modulation method of the PDCCH is fixed (eg, Quadrature Phase Shift Keying, QPSK), and one PDCCH is composed of 1, 2, 4, 8, or 16 CCEs (Control Channel Elements) according to the AL (Aggregation Level). One CCE consists of six REGs (Resource Element Groups). One REG is defined as one OFDMA symbol and one (P)RB.

The PDCCH is transmitted through a control resource set (CORESET). CORESET corresponds to a set of physical resources/parameters used to carry PDCCH/DCI within the BWP. For example, CORESET contains a REG set with a given pneumonology (eg, SCS, CP length, etc.). CORESET may be configured through system information (eg, MIB) or UE-specific higher layer (eg, RRC) signaling. Examples of parameters/information used to set CORESET are as follows. One or more CORESETs are configured for one UE, and a plurality of CORESETs may overlap in the time/frequency domain.

- controlResourceSetId: Indicates identification information (ID) of CORESET.

- frequencyDomainResources: Indicates frequency domain resources of CORESET. It is indicated through a bitmap, and each bit corresponds to an RB group (= 6 consecutive RBs). For example, the Most Significant Bit (MSB) of the bitmap corresponds to the first RB group in the BWP. An RB group corresponding to a bit having a bit value of 1 is allocated as a frequency domain resource of CORESET.

- duration: indicates a time domain resource of CORESET. Indicates the number of consecutive OFDMA symbols constituting CORESET. For example, duration has a value of 1-3.

- cce-REG-MappingType: Indicates the CCE-to-REG mapping type. Interleaved type and non-interleaved type are supported.

- precoderGranularity: Indicates the precoder granularity in the frequency domain.

- tci-StatesPDCCH: Indicates information (eg, TCI-StateID) indicating a Transmission Configuration Indication (TCI) state for the PDCCH. The TCI state is used to provide a Quasi-Co-Location (QCL) relationship between the DL RS(s) in the RS set (TCI-state) and the PDCCH DMRS port.

- tci-PresentInDCI: Indicates whether the TCI field in DCI is included.

- pdcch-DMRS-ScramblingID: Indicates information used for initialization of the PDCCH DMRS scrambling sequence.

For PDCCH reception, the UE may monitor (eg, blind decoding) a set of PDCCH candidates in CORESET. The PDCCH candidate indicates CCE(s) monitored by the UE for PDCCH reception/detection. PDCCH monitoring may be performed in one or more CORESETs on active DL BWPs on each activated cell in which PDCCH monitoring is configured. The set of PDCCH candidates monitored by the UE is defined as a PDCCH search space (SS) set. The SS set may be a Common Search Space (CSS) set or a UE-specific Search Space (USS) set.

Table 4 illustrates the PDCCH search space.

TypeType	Search SpaceSearch Space	RNTIRNTI	Use CaseUse Case
Type0-PDCCHType0-PDCCH	CommonCommon	SI-RNTI on a primary cellSI-RNTI on a primary cell	SIB DecodingSIB Decoding
Type0A-PDCCHType0A-PDCCH	CommonCommon	SI-RNTI on a primary cellSI-RNTI on a primary cell	SIB DecodingSIB Decoding
Type1-PDCCHType1-PDCCH	CommonCommon	RA-RNTI or TC-RNTI on a primary cellRA-RNTI or TC-RNTI on a primary cell	Msg2, Msg4 decoding in RACHMsg2, Msg4 decoding in RACH
Type2-PDCCHType2-PDCCH	CommonCommon	P-RNTI on a primary cellP-RNTI on a primary cell	Paging DecodingPaging Decoding
Type3-PDCCHType3-PDCCH	CommonCommon	INT-RNTI, SFI-RNTI, TPC-PUSCH-RNTI, TPC-PUCCH-RNTI, TPC-SRS-RNTI, C-RNTI, MCS-C-RNTI, or CS-RNTI(s)INT-RNTI, SFI-RNTI, TPC-PUSCH-RNTI, TPC-PUCCH-RNTI, TPC-SRS-RNTI, C-RNTI, MCS-C-RNTI, or CS-RNTI(s)
UE SpecificUE Specific	UE SpecificUE Specific	C-RNTI, or MCS-C-RNTI, or CS-RNTI(s)C-RNTI, or MCS-C-RNTI, or CS-RNTI(s)	User specific PDSCH decodingUser specific PDSCH decoding

The SS set may be configured through system information (eg, MIB) or UE-specific higher layer (eg, RRC) signaling. S (eg, 10) or less SS sets may be configured in each DL BWP of the serving cell. For example, the following parameters/information may be provided for each SS set. Each SS set is associated with one CORESET, and each CORESET configuration can be associated with one or more SS sets.- searchSpaceId: Indicates the ID of the SS set.

- controlResourceSetId: indicates the CORESET associated with the SS set.

- monitoringSlotPeriodicityAndOffset: Indicates the PDCCH monitoring period interval (slot unit) and the PDCCH monitoring interval offset (slot unit).

- monitoringSymbolsWithinSlot: indicates the first OFDMA symbol(s) for PDCCH monitoring in a slot in which PDCCH monitoring is configured. It is indicated through a bitmap, and each bit corresponds to each OFDMA symbol in a slot. The MSB of the bitmap corresponds to the first OFDM symbol in the slot. OFDMA symbol(s) corresponding to bit(s) having a bit value of 1 corresponds to the first symbol(s) of CORESET in the slot.

- nrofCandidates: Indicates the number of PDCCH candidates for each AL={1, 2, 4, 8, 16} (eg, one of 0, 1, 2, 3, 4, 5, 6, 8).

- searchSpaceType: Indicates whether the SS type is CSS or USS.

- DCI format: Indicates the DCI format of a PDCCH candidate.

Based on the CORESET/SS set configuration, the UE may monitor PDCCH candidates in one or more SS sets in the slot. An opportunity (eg, time/frequency resource) to monitor PDCCH candidates is defined as a PDCCH (monitoring) opportunity. One or more PDCCH (monitoring) opportunities may be configured within a slot.

Table 5 illustrates DCI formats transmitted through the PDCCH.

DCI formatDCI format	UsageUsage
0_00_0	Scheduling of PUSCH in one cellScheduling of PUSCH in one cell
0_10_1	Scheduling of PUSCH in one cellScheduling of PUSCH in one cell
1_01_0	Scheduling of PDSCH in one cellScheduling of PDSCH in one cell
1_11_1	Scheduling of PDSCH in one cellScheduling of PDSCH in one cell
2_02_0	Notifying a group of UEs of the slot formatNotifying a group of UEs of the slot format
2_12_1	Notifying a group of UEs of the PRB(s) and OFDM symbol(s) where UE may assume no transmission is intended for the UENotifying a group of UEs of the PRB(s) and OFDM symbol(s) where UE may assume no transmission is intended for the UE
2_22_2	Transmission of TPC commands for PUCCH and PUSCHTransmission of TPC commands for PUCCH and PUSCH
2_32_3	Transmission of a group of TPC commands for SRS transmissions by one or more UEsTransmission of a group of TPC commands for SRS transmissions by one or more UEs

DCI format 0_0 is used to schedule a TB-based (or TB-level) PUSCH, and DCI format 0_1 is a TB-based (or TB-level) PUSCH or CBG (Code Block Group)-based (or CBG-level) PUSCH can be used to schedule DCI format 1_0 is used to schedule a TB-based (or TB-level) PDSCH, and DCI format 1_1 is used to schedule a TB-based (or TB-level) PDSCH or a CBG-based (or CBG-level) PDSCH. Can (DL grant DCI). DCI format 0_0/0_1 may be referred to as UL grant DCI or UL scheduling information, and DCI format 1_0/1_1 may be referred to as DL grant DCI or UL scheduling information. DCI format 2_0 is used to deliver dynamic slot format information (eg, dynamic SFI) to the terminal, and DCI format 2_1 is used to deliver downlink pre-emption information to the terminal. DCI format 2_0 and/or DCI format 2_1 may be delivered to terminals in a corresponding group through a group common PDCCH, which is a PDCCH delivered to terminals defined as one group. DCI format 0_0 and DCI format 1_0 may be referred to as a fallback DCI format, and DCI format 0_1 and DCI format 1_1 may be referred to as a non-fallback DCI format. In the fallback DCI format, the DCI size/field configuration remains the same regardless of the UE configuration. On the other hand, in the non-fallback DCI format, the DCI size/field configuration varies according to UE configuration.

Uplink Channel Structure

The terminal transmits a related signal to the base station through an uplink channel to be described later, and the base station receives the related signal from the terminal through an uplink channel to be described later.

(1) Physical Uplink Control Channel (PUCCH)

The PUCCH carries Uplink Control Information (UCI), HARQ-ACK, and/or a scheduling request (SR), and is divided into Short PUCCH and Long PUCCH according to the PUCCH transmission length.

UCI includes:

- SR (Scheduling Request): Information used to request a UL-SCH resource.

- HARQ (Hybrid Automatic Repeat reQuest)-ACK (Acknowledgment): It is a response to a downlink data packet (eg, codeword) on the PDSCH. Indicates whether the downlink data packet has been successfully received. 1 bit of HARQ-ACK may be transmitted in response to a single codeword, and 2 bits of HARQ-ACK may be transmitted in response to two codewords. The HARQ-ACK response includes positive ACK (simply, ACK), negative ACK (NACK), DTX or NACK/DTX. Here, HARQ-ACK is mixed with HARQ ACK/NACK and ACK/NACK.

- CSI (Channel State Information): feedback information for a downlink channel. Multiple Input Multiple Output (MIMO)-related feedback information includes a Rank Indicator (RI) and a Precoding Matrix Indicator (PMI).

Table 6 illustrates PUCCH formats. According to the PUCCH transmission length, it can be divided into Short PUCCH (formats 0, 2) and Long PUCCH (formats 1, 3, 4).

PUCCH formatPUCCH format	Length in OFDM symbols N_symb ^PUCCH Length in OFDM symbols N _symb ^PUCCH	Number of bitsNumber of bits	UsageUsage		EtcEtc
00	1 - 21 - 2	≤2≤2	HARQ, SRHARQ, SR	Sequence selectionsequence selection
1One	4 - 144 - 14	≤2≤2	HARQ, [SR]HARQ, [SR]	Sequence modulation sequence modulation
22	1 - 21 - 2	>2>2	HARQ, CSI, [SR]HARQ, CSI, [SR]	CP-OFDMCP-OFDM
33	4 - 144 - 14	>2>2	HARQ, CSI, [SR]HARQ, CSI, [SR]	DFT-s-OFDM(no UE multiplexing)DFT-s-OFDM (no UE multiplexing)
44	4 - 144 - 14	>2>2	HARQ, CSI, [SR]HARQ, CSI, [SR]	DFT-s-OFDM(Pre DFT OCC)DFT-s-OFDM (Pre DFT OCC)

PUCCH format 0 carries UCI having a maximum size of 2 bits, and is mapped and transmitted based on a sequence. Specifically, the UE transmits a specific UCI to the base station by transmitting one of the plurality of sequences through the PUCCH having the PUCCH format 0. The UE transmits a PUCCH of PUCCH format 0 within a PUCCH resource for setting a corresponding SR only when transmitting a positive SR. PUCCH format 1 carries UCI with a maximum size of 2 bits, and the modulation symbol is in the time domain. It is spread by an orthogonal cover code (OCC) (which is set differently depending on whether or not frequency hopping is performed). DMRS is transmitted in a symbol in which a modulation symbol is not transmitted (ie, time division multiplexing (TDM) is performed and transmitted).

PUCCH format 2 carries UCI having a bit size greater than 2 bits, and a modulation symbol is transmitted through frequency division multiplexing (FDM) with DMRS. DM-RS is located at symbol indexes #1, #4, #7, and #10 in a given resource block with a density of 1/3. A Pseudo Noise (PN) sequence is used for the DM_RS sequence. For 2-symbol PUCCH format 2, frequency hopping may be activated.

In PUCCH format 3, UE multiplexing is not performed in the same physical resource blocks, and UCI of a bit size greater than 2 bits is carried. In other words, the PUCCH resource of PUCCH format 3 does not include an orthogonal cover code. The modulation symbol is transmitted through DMRS and time division multiplexing (TDM).

In PUCCH format 4, multiplexing is supported for up to 4 UEs in the same physical resource blocks, and UCI of a bit size greater than 2 bits is carried. In other words, the PUCCH resource of PUCCH format 3 includes an orthogonal cover code. The modulation symbol is transmitted through DMRS and time division multiplexing (TDM).

(2) Physical Uplink Shared Channel (PUSCH)

PUSCH carries uplink data (eg, UL-SCH transport block, UL-SCH TB) and/or uplink control information (UCI), and CP-OFDM (Cyclic Prefix - Orthogonal Frequency Division Multiplexing) waveform or It is transmitted based on a Discrete Fourier Transform-spread-Orthogonal Frequency Division Multiplexing (DFT-s-OFDM) waveform. When the PUSCH is transmitted based on the DFT-s-OFDM waveform, the UE transmits the PUSCH by applying transform precoding. For example, when transform precoding is not possible (eg, transform precoding is disabled), the UE transmits a PUSCH based on the CP-OFDM waveform, and when transform precoding is possible (eg, transform precoding is enabled), the UE transmits CP- PUSCH may be transmitted based on an OFDM waveform or a DFT-s-OFDM waveform. PUSCH transmission is dynamically scheduled by a UL grant in DCI, or semi-static based on higher layer (eg, RRC) signaling (and/or Layer 1 (L1) signaling (eg, PDCCH)) -static) can be scheduled (configured scheduling, configured grant). PUSCH transmission may be performed on a codebook-based or non-codebook-based basis.

Table 7 illustrates DCI formats transmitted through the PDCCH.

Uplink Channel Structure

(1) Physical Uplink Control Channel (PUCCH)

UCI includes:

- SR (Scheduling Request): Information used to request a UL-SCH resource.

Table 8 illustrates PUCCH formats. According to the PUCCH transmission length, it can be divided into Short PUCCH (formats 0, 2) and Long PUCCH (formats 1, 3, 4).

PUCCH format 0 carries UCI having a maximum size of 2 bits, and is mapped and transmitted based on a sequence. Specifically, the UE transmits a specific UCI to the base station by transmitting one of the plurality of sequences through the PUCCH having the PUCCH format 0. The UE transmits a PUCCH of PUCCH format 0 within a PUCCH resource for configuring a corresponding SR only when transmitting a positive SR. PUCCH format 1 carries UCI with a maximum size of 2 bits, and the modulation symbol is a time domain It is spread by an orthogonal cover code (OCC) (which is set differently depending on whether or not frequency hopping is performed). DMRS is transmitted in a symbol in which a modulation symbol is not transmitted (that is, time division multiplexing (TDM) is performed and transmitted).

(2) Physical Uplink Shared Channel (PUSCH)

5 illustrates a PUSCH transmission process. Referring to FIG. 5 , the UE may detect the PDCCH in slot #n. Here, the PDCCH includes uplink scheduling information (eg, DCI formats 0_0, 0_1). DCI formats 0_0 and 0_1 may include the following information.

- Frequency domain resource assignment: indicates the RB set allocated to the PUSCH

- Time domain resource assignment: indicates the slot offset K2, the starting position (eg, symbol index) and length (eg, the number of OFDM symbols) of the PUSCH in the slot. The start symbol and length may be indicated through a Start and Length Indicator Value (SLIV) or may be indicated respectively.

Thereafter, the UE may transmit the PUSCH in slot #(n+K2) according to the scheduling information of slot #n. Here, PUSCH includes UL-SCH TB.

In downlink, the base station may dynamically allocate resources for downlink transmission to the terminal through PDCCH(s) (including DCI format 1_0 or DCI format 1_1). In addition, the base station may transmit that some of the resources scheduled in advance to a specific terminal are pre-empted for signal transmission to another terminal through the PDCCH(s) (including DCI format 2_1). In addition, the base station sets a period of downlink assignment through higher layer signaling based on a semi-persistent scheduling (SPS) method, and activation/deactivation of downlink assignment set through PDCCH By signaling , downlink allocation for initial HARQ transmission may be provided to the UE. In this case, when retransmission for the initial HARQ transmission is required, the base station explicitly schedules retransmission resources through the PDCCH. When downlink assignment through DCI and downlink assignment based on semi-persistent scheduling collide, the UE may give priority to downlink assignment through DCI.

Similar to the downlink, in the uplink, the base station may dynamically allocate resources for uplink transmission to the terminal through the PDCCH(s) (including DCI format 0_0 or DCI format 0_1). In addition, the base station may allocate an uplink resource for initial HARQ transmission to the terminal based on a configured grant method (similar to SPS). In dynamic scheduling, the PDCCH is accompanied by PUSCH transmission, but in the configured grant, the PDCCH is not accompanied by the PUSCH transmission. However, uplink resources for retransmission are explicitly allocated through PDCCH(s). As such, an operation in which an uplink resource is preset by a base station without a dynamic grant (eg, an uplink grant through scheduling DCI) is called a 'configured grant'. The configured grant is defined in the following two types.

- Type 1: Uplink grant of a certain period is provided by higher layer signaling (set without separate first layer signaling)

- Type 2: The uplink grant is provided by signaling the period of the uplink grant by higher layer signaling, and signaling the activation/deactivation of the configured grant through the PDCCH

6 illustrates an uplink transmission operation of a terminal. The UE may transmit a packet to be transmitted based on a dynamic grant (FIG. 6(a)) or may transmit based on a preset grant (FIG. 6(b)).

A resource for a grant configured to a plurality of terminals may be shared. Uplink signal transmission based on the configured grant of each UE may be identified based on time/frequency resources and reference signal parameters (eg, different cyclic shifts, etc.). Accordingly, when the uplink transmission of the terminal fails due to signal collision, the base station can identify the corresponding terminal and explicitly transmit a retransmission grant for the corresponding transport block to the corresponding terminal.

By the configured grant, K times repeated transmission including initial transmission is supported for the same transport block. The HARQ Process ID for the uplink signal repeatedly transmitted K times is equally determined based on the resource for the initial transmission. A redundancy version for a corresponding transport block that is repeatedly transmitted K times is one of {0,2,3,1}, {0,3,0,3}, or {0,0,0,0} has

7 illustrates repeated transmission based on a configured grant.

The UE performs repeated transmission until one of the following conditions is satisfied:

- When an uplink grant for the same transport block is successfully received

- When the number of repeated transmissions for the transport block reaches K

- (In case of Option 2), when the end time of period P has reached

Similar to the Licensed-Assisted Access (LAA) of the existing 3GPP LTE system, a method of using an unlicensed band for cellular communication is being considered in the 3GPP NR system. However, unlike LAA, the NR cell (hereinafter, NR UCell) in the unlicensed band aims at a standalone (SA) operation. As an example, PUCCH, PUSCH, PRACH transmission, etc. may be supported in the NR UCell.

8 shows an example of a wireless communication system supporting an unlicensed band applicable to the present disclosure.

In the following description, a cell operating in a licensed band (hereinafter, L-band) is defined as an L-cell, and a carrier of the L-cell is defined as a (DL/UL) LCC. In addition, a cell operating in an unlicensed band (hereinafter, U-band) is defined as a U-cell, and a carrier of the U-cell is defined as (DL/UL) UCC. The carrier/carrier-frequency of the cell may mean an operating frequency (eg, center frequency) of the cell. A cell/carrier (eg, CC) may be collectively referred to as a cell.

When the terminal and the base station transmit and receive signals through the carrier-coupled LCC and UCC as shown in FIG. 8(a), the LCC may be set to a PCC (Primary CC) and the UCC may be set to an SCC (Secondary CC). As shown in FIG. 8(b), the terminal and the base station may transmit/receive signals through one UCC or a plurality of carrier-coupled UCCs. That is, the terminal and the base station can transmit and receive signals through only UCC(s) without LCC. For standalone operation, PRACH, PUCCH, PUSCH, SRS transmission, etc. may be supported in the UCell.

Hereinafter, the signal transmission/reception operation in the unlicensed band described in the present disclosure may be performed based on the above-described deployment scenario (unless otherwise stated).

Unless otherwise noted, the definitions below may be applied to terms used in this disclosure.

- Channel: Consists of continuous RBs in which a channel access procedure is performed in a shared spectrum, and may refer to a carrier or a part of a carrier.

- Channel Access Procedure (CAP): Indicates a procedure for evaluating channel availability based on sensing in order to determine whether other communication node(s) use a channel before signal transmission. A basic unit for sensing is a sensing slot of Tsl=9us duration. When the base station or the terminal senses the channel during the sensing slot period, and the detected power for at least 4us within the sensing slot period is less than the energy detection threshold X _Thresh , the sensing slot period Tsl is considered to be in the idle state. Otherwise, the sensing slot period Tsl=9us is considered a busy state. The CAP may be referred to as Listen-Before-Talk (LBT).

- Channel occupancy: means the corresponding transmission (s) on the channel (s) by the base station / terminal after performing the channel access procedure.

- Channel Occupancy Time (COT): After the base station / terminal performs a channel access procedure, any (any) base station / terminal (s) sharing the channel occupancy with the base station / terminal transmits (s) on the channel ) refers to the total time that can be performed. When determining the COT, if the transmission gap is 25us or less, the gap period is also counted in the COT. The COT may be shared for transmission between the base station and the corresponding terminal(s).

- DL Transmission Burst: Defined as the set of transmissions from the base station, with no gaps exceeding 16us. Transmissions from the base station, separated by a gap greater than 16 us, are considered separate DL transmission bursts from each other. The base station may perform the transmission(s) after the gap without sensing channel availability within the DL transmission burst.

- UL Transmission Burst: Defined as the set of transmissions from the terminal, with no gap exceeding 16us. Transmissions from the UE, separated by a gap greater than 16 us, are considered as separate UL transmission bursts from each other. The UE may perform transmission(s) after the gap without sensing channel availability within the UL transmission burst.

- Discovery Burst: refers to a DL transmission burst comprising a set of signal(s) and/or channel(s), defined within a (time) window and associated with a duty cycle. In an LTE-based system, the discovery burst is transmission(s) initiated by the base station, including PSS, SSS, and cell-specific RS (CRS), and may further include non-zero power CSI-RS. A discovery burst in an NR-based system is the transmission(s) initiated by the base station, comprising at least an SS/PBCH block, CORESET for PDCCH scheduling PDSCH with SIB1, PDSCH carrying SIB1 and/or non-zero It may further include a power CSI-RS.

9 illustrates a method of occupying resources in an unlicensed band applicable to the present disclosure.

Referring to FIG. 9 , a communication node (eg, a base station, a terminal) within an unlicensed band must determine whether to use a channel of another communication node(s) before signal transmission. To this end, the communication node in the unlicensed band may perform a channel access process (CAP) to access the channel (s) on which transmission (s) is performed. The channel access process may be performed based on sensing. For example, the communication node may first perform CS (Carrier Sensing) before signal transmission to check whether other communication node(s) are transmitting the signal. A case in which it is determined that other communication node(s) does not transmit a signal is defined as CCA (Clear Channel Assessment) has been confirmed. If there is a pre-defined or CCA threshold (eg, X _Thresh ) set by a higher layer (eg, RRC), the communication node determines the channel state as busy when energy higher than the CCA threshold is detected in the channel and , otherwise, it may be determined that the channel state is idle. If it is determined that the channel state is dormant, the communication node may start transmitting a signal in the unlicensed band. CAP can be replaced with LBT.

Table 9 illustrates a channel access procedure (CAP) supported in NR-U applicable to this disclosure.

	TypeType	Explanation Explanation
DLDL
DLDL	Type 1 CAPType 1 CAP	CAP with random back-off - time duration spanned by the sensing slots that are sensed to be idle before a downlink transmission(s) is randomCAP with random back-off - time duration spanned by the sensing slots that are sensed to be idle before a downlink transmission(s) is random

Type 2 CAP - Type 2A, 2B, 2CType 2 CAP - Type 2A, 2B, 2C	CAP without random back-off - time duration spanned by sensing slots that are sensed to be idle before a downlink transmission(s) is deterministicCAP without random back-off - time duration spanned by sensing slots that are sensed to be idle before a downlink transmission(s) is deterministic
ULUL
ULUL	Type 1 CAPType 1 CAP	CAP with random back-off - time duration spanned by the sensing slots that are sensed to be idle before a downlink transmission(s) is randomCAP with random back-off - time duration spanned by the sensing slots that are sensed to be idle before a downlink transmission(s) is random

Type 2 CAP - Type 2A, 2B, 2CType 2 CAP - Type 2A, 2B, 2C	CAP without random back-off - time duration spanned by sensing slots that are sensed to be idle before a downlink transmission(s) is deterministicCAP without random back-off - time duration spanned by sensing slots that are sensed to be idle before a downlink transmission(s) is deterministic

In a wireless communication system supporting an unlicensed band, one cell (or carrier (eg, CC)) or BWP set to a terminal may be configured as a wideband having a larger BW (BandWidth) than that of existing LTE, however, BW requiring CCA based on independent LBT operation based on regulation, etc. may be limited. If a sub-band (SB) in which individual LBT is performed is defined as an LBT-SB, a plurality of LBT-SBs may be included in one wideband cell/BWP. The RB set constituting the LBT-SB may be set through higher layer (eg, RRC) signaling. Accordingly, based on (i) the BW of the cell/BWP and (ii) the RB set allocation information, one cell/BWP may include one or more LBT-SBs. A plurality of LBTs in the BWP of a cell (or carrier) -SB may be included. The LBT-SB may have, for example, a 20 MHz band. The LBT-SB is composed of a plurality of consecutive (P)RBs in the frequency domain, and may be referred to as a (P)RB set.

On the other hand, in Europe, two types of LBT operations called FBE (Frame Based Equipment) and LBE (Load Based Equipment) are exemplified. FBE is channel occupancy time (eg, 1~10ms), which means the time during which a communication node can continue transmission when channel access is successful, and an idle period corresponding to at least 5% of the channel occupancy time (idle period) constitutes one fixed (fixed) frame. In addition, CCA is defined as the operation of observing a channel during a CCA slot (at least 20 μs) at the end of an idle period. A communication node periodically performs CCA in units of fixed frames, and if the channel is unoccupied, it transmits data during the channel occupied time. Wait until the CCA slot.

In the case of LBE, the communication node first sets the value of q∈{4, 5, ... , 32} and then performs CCA for one CCA slot. If the channel is not occupied in the first CCA slot, data can be transmitted by securing a maximum (13/32)q ms length. If the channel is occupied in the first CCA slot, the communication node randomly selects a value of N∈{1, 2, ..., q} and stores it as the initial value of the counter. Thereafter, while sensing the channel state in units of CCA slots, if the channel is in an unoccupied state in units of CCA slots, the value stored in the counter is decremented by one. When the counter value becomes 0, the communication node can transmit data by securing a time of up to (13/32)q ms in length.

The eNB/gNB or UE of the LTE/NR system must also perform LBT for signal transmission in an unlicensed band (referred to as U-band for convenience). In addition, when the eNB or UE of the LTE/NR system transmits a signal, other communication nodes such as WiFi also perform LBT so that the eNB or UE does not cause interference with the transmission. For example, in the WiFi standard (801.11ac), the CCA threshold is defined as -62 dBm for a non-WiFi signal and -82 dBm for a WiFi signal. For example, when a signal other than WiFi is received by the STA (Station) or the AP (Access Point) with power of -62 dBm or more, the STA (Station) or AP (Access Point) does not transmit other signals in order not to cause interference. .

On the other hand, the terminal performs type 1 or type 2 CAP for uplink signal transmission in the unlicensed band. In general, the terminal may perform a CAP (eg, type 1 or type 2) configured by the base station for uplink signal transmission. For example, the UE may include CAP type indication information in a UL grant for scheduling PUSCH transmission (eg, DCI formats 0_0, 0_1).

In the Type 1 UL CAP, the length of a time interval spanned by a sensing slot sensed as idle before transmission(s) is random. Type 1 UL CAP may be applied to the following transmission.

- Scheduled and / or configured (configured) PUSCH / SRS transmission (s) from the base station

- Scheduling and/or configured PUCCH transmission(s) from the base station

- Transmission(s) related to RAP (Random Access Procedure)

10 illustrates a Type 1 CAP operation during a channel access procedure of a terminal for transmitting uplink and/or downlink signals in an unlicensed band applicable to the present disclosure.

First, with reference to FIG. 10, an uplink signal transmission in an unlicensed band will be described.

The terminal first senses whether the channel is idle during the sensing slot period of the delay duration Td, and then, when the counter N becomes 0, transmission may be performed (S1034). At this time, the counter N is adjusted by sensing the channel during the additional sensing slot period(s) according to the procedure below:

Step 1) (S1020) Set N=N _init . Here, N _init is a random value uniformly distributed between 0 and CWp. Then go to step 4.

Step 2) (S1040) If N>0 and the terminal chooses to decrement the counter, set N=N-1.

Step 3) (S1050) The channel is sensed during the additional sensing slot period. At this time, if the additional sensing slot period is idle (Y), the process moves to step 4. If not (N), go to step 5.

Step 4) (S1030) If N=0 (Y), the CAP procedure is terminated (S1032). Otherwise (N), go to step 2.

Step 5) (S1060) The channel is sensed until a busy sensing slot is detected within the additional delay period Td or all sensing slots within the additional delay period Td are detected as idle.

Step 6) (S1070) If the channel is sensed as idle during all sensing slot sections of the additional delay section Td (Y), the process moves to step 4. If not (N), go to step 5.

Table 10 illustrates that the mp, minimum CW, maximum CW, Maximum Channel Occupancy Time (MCOT) and allowed CW sizes applied to the CAP vary according to the channel access priority class.

Channel Access Priority Class (p)Channel Access Priority Class (p)	mpmp	CWmin,pCWmin,p	CWmax,p CWmax,p	Tulmcot,pTulmcot, p	allowed CWp sizesallowed CWp sizes
1One	22	33	77	2 ms2 ms	{3,7}{3,7}
22	22	77	1515	4 ms4 ms	{7,15}{7,15}
33	33	1515	10231023	6 or 10 ms 6 or 10 ms	{15,31,63,127,255,511,1023}{15,31,63,127,255,511,1023}
44	77	1515	10231023	6 or 10 ms6 or 10 ms	{15,31,63,127,255,511,1023}{15,31,63,127,255,511,1023}

The delay interval Td is configured in the order of interval Tf (16us) + mp consecutive sensing slot intervals Tsl (9us). Tf includes the sensing slot period Tsl at the start of the 16us period. CWmin,p <= CWp <= CWmax,p. CWp is set as CWp = CWmin,p, and may be updated before step 1 based on an explicit/implicit reception response to a previous UL burst (eg, PUSCH) (CW size update). For example, CWp may be initialized to CWmin,p based on an explicit/implicit reception response to a previous UL burst, may be increased to the next highest allowed value, or the existing value may be maintained.

In Type 2 UL CAP, the length of a time interval spanned by a sensing slot sensed as idle before transmission(s) is deterministic. Type 2 UL CAPs are classified into Type 2A/2B/2C UL CAPs. In Type 2A UL CAP, the UE may transmit transmission immediately after the channel is sensed as idle for at least the sensing period Tshort_dl=25us. Here, Tshort_dl consists of a period Tf (=16us) and one sensing slot period immediately following. In Type 2A UL CAP, Tf includes a sensing slot at the beginning of the interval. In Type 2B UL CAP, the UE may transmit transmission immediately after the channel is sensed as idle for the sensing period Tf=16us. In Type 2B UL CAP, Tf includes a sensing slot within the last 9us of the interval. In Type 2C UL CAP, the UE does not sense a channel before performing transmission.

For uplink data transmission of the UE in the unlicensed band, the base station must first succeed in LBT for UL grant transmission on the unlicensed band, and the UE must also succeed in LBT for UL data transmission. That is, UL data transmission can be attempted only when both LBTs of the base station end and the terminal end succeed. In addition, since a delay of at least 4 msec is required between UL data scheduled from the UL grant in the LTE system, the scheduled UL data transmission may be delayed because other transmission nodes coexisting in the unlicensed band preferentially access during the corresponding time. For this reason, a method for increasing the efficiency of UL data transmission in an unlicensed band is being discussed.

In NR, in order to support UL transmission having relatively high reliability and low delay time, the base station uses a combination of an upper layer signal (eg, RRC signaling) or an upper layer signal and an L1 signal (eg, DCI) in time, frequency, and Supports configured grant type 1 and type 2 for setting code domain resources to the terminal. The UE may perform UL transmission using a resource configured as Type 1 or Type 2 without receiving a UL grant from the eNB. Type 1 is the set period of the grant, offset compared to SFN=0, time/frequency resource allocation (time/freq. resource allocation), number of repetitions, DMRS parameter, MCS/TBS, power control parameter, etc. Without this L1 signal, all are set only to the higher layer signal such as RRC. In Type 2, the configured grant period and power control parameters are set with higher layer signals such as RRC, and information about the remaining resources (eg, offset of initial transmission timing and time/frequency resource allocation, DMRS parameters, MCS/TBS, etc.) ) is a method indicated by activation DCI, which is an L1 signal.

Now, with reference to FIG. 10, a downlink signal transmission in an unlicensed band will be described.

The base station may perform one of the following channel access procedures (CAP) for downlink signal transmission in the unlicensed band.

(1) Type 1 downlink (DL) CAP method

In the Type 1 DL CAP, the length of a time interval spanned by a sensing slot sensed as idle before transmission(s) is random. Type 1 DL CAP can be applied to the following transmission.

- initiated by the base station, comprising (i) a unicast PDSCH with user plane data, or (ii) a unicast PDSCH with user plane data and a unicast PDCCH scheduling user plane data ) transmit(s), or;

- Transmission(s) initiated by the base station, either (i) with a discovery burst only, or (ii) with a discovery burst multiplexed with non-unicast information.

Referring to FIG. 10 , the base station first senses whether a channel is idle during a sensing slot period of a delay duration Td, and then, when the counter N becomes 0, transmission may be performed (S1034). At this time, the counter N is adjusted by sensing the channel during the additional sensing slot period(s) according to the procedure below:

Step 1) (S1020) Set N=Ninit. Here, Ninit is a random value uniformly distributed between 0 and CWp. Then go to step 4.

Step 2) (S1040) If N>0 and the base station chooses to decrement the counter, set N=N-1.

Table 11 shows the mp applied to the CAP according to the channel access priority class, the minimum contention window (CW), the maximum CW, the maximum channel occupancy time (MCOT), and the allowed CW sizes (allowed CW sizes). ) is different.

Channel Access Priority Class (p)Channel Access Priority Class (p)	m_p m _p	CWmin,pCWmin,p	CWmax,pCWmax,p	Tmcot,pTmcot,p	allowed CWp sizesallowed CWp sizes
1One	1One	33	77	2 ms2 ms	{3,7}{3,7}
22	1One	77	1515	3 ms3 ms	{7,15}{7,15}
33	33	1515	6363	8 or 10 ms8 or 10 ms	{15,31,63}{15,31,63}
44	77	1515	10231023	8 or 10 ms8 or 10 ms	{15,31,63,127,255,511,1023}{15,31,63,127,255,511,1023}

The delay interval Td is configured in the order of interval Tf (16us) + mp consecutive sensing slot intervals Tsl (9us). Tf includes the sensing slot period Tsl at the start time of the 16us period.

CWmin,p <= CWp <= CWmax,p. CWp is set as CWp = CWmin,p, and may be updated before step 1 based on HARQ-ACK feedback (eg, ACK or NACK ratio) for the previous DL burst (eg, PDSCH) (CW size update). For example, CWp may be initialized to CWmin,p based on the HARQ-ACK feedback for the previous DL burst, may be increased to the next highest allowed value, or the existing value may be maintained.

(2) Type 2 downlink (DL) CAP method

In the Type 2 DL CAP, the length of a time interval spanned by a sensing slot sensed as idle before transmission(s) is deterministic. Type 2 DL CAPs are classified into Type 2A/2B/2C DL CAPs.

Type 2A DL CAP can be applied to the following transmission. In Type 2A DL CAP, the base station may transmit transmission immediately after the channel is sensed as idle for at least the sensing period Tshort_dl=25us. Here, Tshort_dl consists of a period Tf (=16us) and one sensing slot period immediately following. Tf includes a sensing slot at the beginning of the interval.

- transmission(s) initiated by the base station, either (i) with a discovery burst only, or (ii) with a discovery burst multiplexed with non-unicast information, or;

- Transmission(s) of the base station after a 25us gap from the transmission(s) by the terminal within the shared channel occupancy.

Type 2B DL CAP is applicable to transmission(s) performed by a base station after a 16us gap from transmission(s) by a terminal within a shared channel occupation time. In Type 2B DL CAP, the base station may transmit transmission immediately after the channel is sensed as idle for Tf=16us. Tf includes a sensing slot within the last 9us of the interval. Type 2C DL CAP is applicable to transmission(s) performed by a base station after a maximum of 16us gap from transmission(s) by a terminal within a shared channel occupation time. In Type 2C DL CAP, the base station does not sense the channel before performing transmission.

In a wireless communication system supporting an unlicensed band, one cell (or carrier (eg, CC)) or BWP set to a terminal may be configured as a wideband having a larger BW (BandWidth) than that of existing LTE, however, BW requiring CCA based on independent LBT operation based on regulation, etc. may be limited. If a sub-band (SB) in which individual LBT is performed is defined as an LBT-SB, a plurality of LBT-SBs may be included in one wideband cell/BWP. The RB set constituting the LBT-SB may be set through higher layer (eg, RRC) signaling. Accordingly, based on (i) the BW of the cell/BWP and (ii) the RB set allocation information, one cell/BWP may include one or more LBT-SBs.

11 illustrates a case in which a plurality of LBT-SBs are included in the unlicensed band.

Referring to FIG. 11 , a plurality of LBT-SBs may be included in the BWP of a cell (or carrier). The LBT-SB may have, for example, a 20 MHz band. The LBT-SB is composed of a plurality of consecutive (P)RBs in the frequency domain, and may be referred to as a (P)RB set. Although not shown, a guard band GB may be included between the LBT-SBs. Therefore, BWP is {LBT-SB #0 (RB set #0) + GB #0 + LBT-SB #1 (RB set #1 + GB #1) + ... + LBT-SB #(K-1) (RB set (#K-1))} may be configured. For convenience, the LBT-SB/RB index may be set/defined to start from a low frequency band and increase toward a high frequency band.

12 illustrates an RB interlace. In the shared spectrum, in consideration of OCB (Occupied Channel Bandwidth) and PSD (Power Spectral Density) related regulations, a set of (equal interval) discontinuous (single) RBs on a frequency is used/allocated for UL (physical) channel/signal transmission It can be defined as a unit resource that becomes Such a discontinuous RB set is defined as "RB interlace" (simply, interlace) for convenience.

12 , a plurality of RB interlaces (simply, interlaces) may be defined within a frequency band. Here, the frequency band may include a (wideband) cell/CC/BWP/RB set, and the RB may include a PRB. For example, interlace #m∈{0, 1, ..., M-1} may consist of (common) RB {m, M+m, 2M+m, 3M+m, ...} . M represents the number of interlaces. A transmitter (eg, a terminal) may transmit a signal/channel using one or more interlaces. The signal/channel may include PUCCH or PUSCH.

For example, in the case of UL resource allocation type 2, RB allocation information (eg, frequency domain resource assignment of FIG. E 5 ) provides a maximum of M (positive integer) interlace indices and (in case of DCI 0_1) to the UE.

It may indicate a set of consecutive RBs. Here, the RB set corresponds to a frequency resource in which a channel access procedure (CAP) is individually performed in a shared spectrum, and is composed of a plurality of consecutive (P)RBs. The UE uses the RB(s) corresponding to the intersection of the indicated interlace and the indicated RB set(s) [and, (if any) a guard band between the indicated RB set(s)] as a frequency resource for PUSCH transmission. can decide Here, a guard band between consecutive RB set(s) is also used as a frequency resource for PUSCH transmission. Therefore, the RB(s) corresponding to the intersection of (1) the indicated interlace and (2) [the indicated RB set(s) + (if any) the guard band between the indicated RB set(s)] transmits the PUSCH It may be determined as a frequency resource for

When u=0, the X (positive integer) MSB of the RB allocation information indicates an interlace index set (m0+1) allocated to the UE, and the indication information consists of a Resource Indication Value (RIV). When 0 <= RIV < M(M+1)/2, it has l=0, 1 , ..., L-1, and RIV is (i) the starting interlace index mo and (ii) the successive interlace indexes. Corresponds to the number L (a positive integer). RIV is defined as follows.

[수학식 1][Equation 1]

if

then

else

Here, M represents the number of interlaces, mo represents the start interlace index, L represents the number of consecutive interlaces,

represents the flooring function.

When RIV >= M(M+1)/2, RIV corresponds to (i) a start interlace index mo and (ii) a set of l values as shown in Table 12.

RIV=M(M-1)/2RIV=M(M-1)/2	m₀ m ₀	l l
00	00	{0, 5}{0, 5}
1One	00	{0, 1, 5, 6}{0, 1, 5, 6}
22	1One	{0, 5}{0, 5}
33	1One	{0, 1, 2, 3, 5, 6, 7, 8}{0, 1, 2, 3, 5, 6, 7, 8}
44	22	{0, 5}{0, 5}
55	22	{0, 1, 2, 5, 6, 7}{0, 1, 2, 5, 6, 7}
66	33	{0, 5}{0, 5}
77	44	{0, 5}{0, 5}

In the case of u=1, the X (positive integer) MSB of RB allocation information (ie, frequency domain resource assignment) includes a bitmap indicating an interlace allocated to the UE. The size of the bitmap is M bits, and each bit corresponds to an individual interlace. For example, interlaces #0 to #(M-1) are mapped one-to-one to MSB to LSB of the bitmap, respectively. If the bit value in the bitmap is 1, the corresponding interlace is allocated to the terminal, otherwise, the corresponding interlace is not allocated to the terminal.

In the case of u=0 and u=1, the RB allocation information

may indicate to the UE the RB set(s) continuously allocated for PUSCH. Here, N ^BWP _RB-set indicates the number of RB sets set in the BWP,

represents the ceiling function. PUSCH may be scheduled by DCI format 0_1, Type 1 configured grant and Type 2 configured grant. The resource allocation information may be composed of RIV (hereinafter, RIV _RBset ). If 0 <= RIV _RBset < N ^BWP _RB-set (N ^BWP _RB-set +1)/2, then l=0, 1, ..., L _RBset-1 , and RIV is (i) the starting RB set ( RB _setSTART ) and (ii) the number of consecutive RB set(s) (L _RBset ) (a positive integer). RIV is defined as follows.

[수학식 2][Equation 2]

Here, L _RBset indicates the number of consecutive RB set(s), N ^BWP _RB-set indicates the number of RB sets set in the BWP, and RB _setSTART indicates the index of the starting RB set,

represents the flooring function.

13 illustrates resource allocation for UL transmission in a shared spectrum.

Referring to FIG. 13( a ), based on the resource allocation information for PUSCH indicating {interlace #1, RB set #1}, RBs belonging to interlace #1 in RB set #1 may be determined as PUSCH resources. . That is, RBs corresponding to the intersection of {interlace #1, RB set #1} may be determined as PUSCH resources. Referring to FIG. 13(b), based on the resource allocation information for PUSCH indicating {interlace #2, RB set #1/#2}, RBs belonging to interlace #2 in RB set #1/#2 are It may be determined as a PUSCH resource. In this case, a GB between RB set #1 and RB set #2 (ie, GB #1) may also be used as a PUSCH transmission resource. That is, RBs corresponding to the intersection of {interlace #1, RB set #1/#2+GB #1} may be determined as PUSCH resources. In this case, even if adjacent to RB set #1/#2, a GB that is not between RB set #1 and RB set #2 (ie, GB #0) is not used as a PUSCH transmission resource.

프리엠션 지시(Pre-emption indication)Pre-emption indication

For NR, dynamic resource sharing between eMBB and URLLC is supported. eMBB and URLLC services may be scheduled on non-overlapping time/frequency resources, and URLLC transmission may occur on resources scheduled for ongoing eMBB traffic. The eMBB UE may not know whether the PDSCH transmission of the corresponding UE is partially punctured, and the UE may not be able to decode the PDSCH due to corrupted coded bits. In consideration of this, NR provides a preemption indication. The preemption indication may also be referred to as an interrupted transmission indication.

With respect to the preemption indication, the UE receives the DownlinkPreemption IE through RRC signaling from the BS. Table 13 below shows an example of DownlinkPreemption IE.

[표 13][Table 13]

When the UE is provided with the DownlinkPreemption IE, the UE is configured with the INT-RNTI provided by the parameter int-RNTI in the DownlinkPreemption IE for monitoring of a PDCCH carrying DCI format 2_1. The UE is additionally configured with a set of serving cells by INT-ConfigurationPerServing Cell including a set of serving cell indices provided by servingCellID and a corresponding set of positions for fields in DCI format 2_1 by positionInDCI, dci-PayloadSize It is established with the information payload size for DCI format 2_1 by , and is set with the indicated granularity of time-frequency resources by timeFrequencySect.

The UE receives DCI format 2_1 from the BS based on the DownlinkPreemption IE.

When the UE detects DCI format 2_1 for a serving cell in the configured set of serving cells, the UE determines that the DCI format of the set of PRBs and symbols of the monitoring period immediately preceding the monitoring period to which the DCI format 2_1 belongs. It can be assumed that there is no transmission to the UE in the PRBs and symbols indicated by 2_1. For example, referring to FIG. 14 , the UE sees that the signal in the time-frequency resource indicated by the preemption is not the DL transmission scheduled for it and decodes data based on the signals received in the remaining resource region.

14 is a diagram illustrating an example of a preemption instruction method.

A combination of {M,N} is set by the RRC parameter timeFrequencySet. {M,N}={14,1}, {7,2}.

15 shows an example of a time/frequency set of a preemption indication.

A 14-bit bitmap for indicating preemption indicates one or more frequency parts (N>=1) and/or one or more time domain parts (M>=1). When {M,N}={14,1}, 14 parts in the time domain correspond to 14 bits of a 14-bit bitmap one-to-one as in the left diagram of FIG. J3, and the 14 bits A part corresponding to the bit set to 1 is a part including pre-empted resources. When {M,N}={14,2}, as in the right diagram of FIG. 15 , the time-frequency resource of the monitoring period is divided into 7 parts in the time domain and 2 parts in the frequency domain , divided into a total of 14 time-frequency parts. The total of 14 time-frequency parts correspond one-to-one to 14 bits of a 14-bit bitmap, and a part corresponding to a bit set to 1 among the 14 bits is a part including preempted resources. .

Hereinafter, a method and apparatus for indicating a channel access parameter for the present disclosure and performing a channel access procedure based thereon will be described in earnest.

Specifically, each field in DCI and the width of each field can be variably adjusted to obtain high reliability to support URLLC (ultra-reliable low-latency communications) operation. DCI format x_2 family (eg DCI format 0_2, DCI format 1_2) was introduced.

When the DCI format x_2 series is used for UL or DL scheduling in an unlicensed band, a channel including at least one of CAT (channel access type), CPE (cyclic prefix extension), and CAPC (Channel Access Priority Class) for channel access A channel access parameter may indicate one joint-encoded entry to a specific field in DCI.

Therefore, in the present disclosure, a method of setting and indicating a joint-encoded channel access parameter entry will be described.

On the other hand, in Rel-16 NR-U, DCI format x_0 (eg DCI format 1_0 or DCI format 0_0) or DCI format x_1 (eg DCI format 1_1 or DCI format 0_1) through the channel access parameter indication field in the terminal All or part of CAT (channel access type) / CPE (cyclic prefix extension) / CAPC (channel access priority class) can indicate one joint-encoded entry.

In the case of Fallback DCI (DCI format x_0 series), one of the indices of the mother table consisting of 4 entries in TS 38.212 can be dynamically indicated.

An example of a mother table used for fallback DCI may be as shown in [Table 14] below.

Bit field mapped to indexBit field mapped to index	Channel Access Type Channel Access Type	The CP extension T_"ext" index defined in Clause 5.3.1 of [4, TS 38.211]The CP extension T_"ext" index defined in Clause 5.3.1 of [4, TS 38.211]
00	Type2C-ULChannelAccess defined in [clause 4.2.1.2.3 in 37.213]Type2C-ULChannelAccess defined in [clause 4.2.1.2.3 in 37.213]	22
1One	Type2A-ULChannelAccess defined in [clause 4.2.1.2.1 in 37.213]Type2A-ULChannelAccess defined in [clause 4.2.1.2.1 in 37.213]	33
22	Type2A-ULChannelAccess defined in [clause 4.2.1.2.1 in 37.213]Type2A-ULChannelAccess defined in [clause 4.2.1.2.1 in 37.213]	1One
33	Type1-ULChannelAccess defined in [clause 4.2.1.1 in 37.213]Type1-ULChannelAccess defined in [clause 4.2.1.1 in 37.213]	00

In the case of non-fallback DCI (DCI format x_1 series), some entries are set as RRC (Radio Resource Control) from the mother table defined in TS 38.212, and one of the set entry sets is dynamically indicated.

In this case, an example of a mother table used for non-fallback DCI may be as shown in [Table 15] and/or [Table 16] below.

Entry indexentry index	Channel Access Type Channel Access Type	The CP extension T_"ext" index defined in Clause 5.3.1 of [4, 38.211]The CP extension T_"ext" index defined in Clause 5.3.1 of [4, 38.211]	CAPCCAPC
00	Type2C-ULChannelAccess　 defined in [clause 4.2.1.2.3 in 37.213]Type2C-ULChannelAccess　 defined in [clause 4.2.1.2.3 in 37.213]	00	1One
1One	Type2C-ULChannelAccess　 defined in [clause 4.2.1.2.3 in 37.213]Type2C-ULChannelAccess　 defined in [clause 4.2.1.2.3 in 37.213]	00	22
22	Type2C-ULChannelAccess　 defined in [clause 4.2.1.2.3 in 37.213]Type2C-ULChannelAccess　 defined in [clause 4.2.1.2.3 in 37.213]	00	33
33	Type2C-ULChannelAccess　 defined in [clause 4.2.1.2.3 in 37.213]Type2C-ULChannelAccess　 defined in [clause 4.2.1.2.3 in 37.213]	00	44
44	Type2C-ULChannelAccess　 defined in [clause 4.2.1.2.3 in 37.213]Type2C-ULChannelAccess　 defined in [clause 4.2.1.2.3 in 37.213]	22	1One
55	Type2C-ULChannelAccess　 defined in [clause 4.2.1.2.3 in 37.213]Type2C-ULChannelAccess　 defined in [clause 4.2.1.2.3 in 37.213]	22	22
66	Type2C-ULChannelAccess　 defined in [clause 4.2.1.2.3 in 37.213]Type2C-ULChannelAccess　 defined in [clause 4.2.1.2.3 in 37.213]	22	33
77	Type2C-ULChannelAccess　 defined in [clause 4.2.1.2.3 in 37.213]Type2C-ULChannelAccess　 defined in [clause 4.2.1.2.3 in 37.213]	22	44
88	Type2B-ULChannelAccess　 defined in [clause 4.2.1.2.3 in 37.213]Type2B-ULChannelAccess　 defined in [clause 4.2.1.2.3 in 37.213]	00	1One
99	Type2B-ULChannelAccess　 defined in [clause 4.2.1.2.3 in 37.213]Type2B-ULChannelAccess　 defined in [clause 4.2.1.2.3 in 37.213]	00	22
1010	Type2B-ULChannelAccess　 defined in [clause 4.2.1.2.3 in 37.213]Type2B-ULChannelAccess　 defined in [clause 4.2.1.2.3 in 37.213]	00	33
1111	Type2B-ULChannelAccess　 defined in [clause 4.2.1.2.3 in 37.213]Type2B-ULChannelAccess　 defined in [clause 4.2.1.2.3 in 37.213]	00	44
1212	Type2B-ULChannelAccess　 defined in [clause 4.2.1.2.3 in 37.213]Type2B-ULChannelAccess　 defined in [clause 4.2.1.2.3 in 37.213]	22	1One
1313	Type2B-ULChannelAccess　 defined in [clause 4.2.1.2.3 in 37.213]Type2B-ULChannelAccess　 defined in [clause 4.2.1.2.3 in 37.213]	22	22
1414	Type2B-ULChannelAccess　 defined in [clause 4.2.1.2.3 in 37.213]Type2B-ULChannelAccess　 defined in [clause 4.2.1.2.3 in 37.213]	22	33
1515	Type2B-ULChannelAccess　 defined in [clause 4.2.1.2.3 in 37.213]Type2B-ULChannelAccess　 defined in [clause 4.2.1.2.3 in 37.213]	22	44
1616	Type2A-ULChannelAccess defined in [clause 4.2.1.2.1 in 37.213]Type2A-ULChannelAccess defined in [clause 4.2.1.2.1 in 37.213]	00	1One
1717	Type2A-ULChannelAccess defined in [clause 4.2.1.2.1 in 37.213]Type2A-ULChannelAccess defined in [clause 4.2.1.2.1 in 37.213]	00	22
1818	Type2A-ULChannelAccess defined in [clause 4.2.1.2.1 in 37.213]Type2A-ULChannelAccess defined in [clause 4.2.1.2.1 in 37.213]	00	33
1919	Type2A-ULChannelAccess defined in [clause 4.2.1.2.1 in 37.213]Type2A-ULChannelAccess defined in [clause 4.2.1.2.1 in 37.213]	00	44
2020	Type2A-ULChannelAccess defined in [clause 4.2.1.2.1 in 37.213]Type2A-ULChannelAccess defined in [clause 4.2.1.2.1 in 37.213]	1One	1One
2121	Type2A-ULChannelAccess defined in [clause 4.2.1.2.1 in 37.213]Type2A-ULChannelAccess defined in [clause 4.2.1.2.1 in 37.213]	1One	22
2222	Type2A-ULChannelAccess defined in [clause 4.2.1.2.1 in 37.213]Type2A-ULChannelAccess defined in [clause 4.2.1.2.1 in 37.213]	1One	33
2323	Type2A-ULChannelAccess defined in [clause 4.2.1.2.1 in 37.213]Type2A-ULChannelAccess defined in [clause 4.2.1.2.1 in 37.213]	1One	44
2424	Type2A-ULChannelAccess defined in [clause 4.2.1.2.1 in 37.213]Type2A-ULChannelAccess defined in [clause 4.2.1.2.1 in 37.213]	33	1One
2525	Type2A-ULChannelAccess defined in [clause 4.2.1.2.1 in 37.213]Type2A-ULChannelAccess defined in [clause 4.2.1.2.1 in 37.213]	33	22
2626	Type2A-ULChannelAccess defined in [clause 4.2.1.2.1 in 37.213]Type2A-ULChannelAccess defined in [clause 4.2.1.2.1 in 37.213]	33	33
2727	Type2A-ULChannelAccess defined in [clause 4.2.1.2.1 in 37.213]Type2A-ULChannelAccess defined in [clause 4.2.1.2.1 in 37.213]	33	44
2828	Type1-ULChannelAccess defined in [clause 4.2.1.1 in 37.213]Type1-ULChannelAccess defined in [clause 4.2.1.1 in 37.213]	00	1One
2929	Type1-ULChannelAccess defined in [clause 4.2.1.1 in 37.213]Type1-ULChannelAccess defined in [clause 4.2.1.1 in 37.213]	00	22
3030	Type1-ULChannelAccess defined in [clause 4.2.1.1 in 37.213]Type1-ULChannelAccess defined in [clause 4.2.1.1 in 37.213]	00	33
3131	Type1-ULChannelAccess defined in [clause 4.2.1.1 in 37.213]Type1-ULChannelAccess defined in [clause 4.2.1.1 in 37.213]	00	44
3232	Type1-ULChannelAccess defined in [clause 4.2.1.1 in 37.213]Type1-ULChannelAccess defined in [clause 4.2.1.1 in 37.213]	1One	1One
3333	Type1-ULChannelAccess defined in [clause 4.2.1.1 in 37.213]Type1-ULChannelAccess defined in [clause 4.2.1.1 in 37.213]	1One	22
3434	Type1-ULChannelAccess defined in [clause 4.2.1.1 in 37.213]Type1-ULChannelAccess defined in [clause 4.2.1.1 in 37.213]	1One	33
3535	Type1-ULChannelAccess defined in [clause 4.2.1.1 in 37.213]Type1-ULChannelAccess defined in [clause 4.2.1.1 in 37.213]	1One	44
3636	Type1-ULChannelAccess defined in [clause 4.2.1.1 in 37.213]Type1-ULChannelAccess defined in [clause 4.2.1.1 in 37.213]	22	1One
3737	Type1-ULChannelAccess defined in [clause 4.2.1.1 in 37.213]Type1-ULChannelAccess defined in [clause 4.2.1.1 in 37.213]	22	22
3838	Type1-ULChannelAccess defined in [clause 4.2.1.1 in 37.213]Type1-ULChannelAccess defined in [clause 4.2.1.1 in 37.213]	22	33
3939	Type1-ULChannelAccess defined in [clause 4.2.1.1 in 37.213]Type1-ULChannelAccess defined in [clause 4.2.1.1 in 37.213]	22	44
4040	Type1-ULChannelAccess defined in [clause 4.2.1.1 in 37.213]Type1-ULChannelAccess defined in [clause 4.2.1.1 in 37.213]	33	1One
4141	Type1-ULChannelAccess defined in [clause 4.2.1.1 in 37.213]Type1-ULChannelAccess defined in [clause 4.2.1.1 in 37.213]	33	22
4242	Type1-ULChannelAccess defined in [clause 4.2.1.1 in 37.213]Type1-ULChannelAccess defined in [clause 4.2.1.1 in 37.213]	33	33
4343	Type1-ULChannelAccess defined in [clause 4.2.1.1 in 37.213]Type1-ULChannelAccess defined in [clause 4.2.1.1 in 37.213]	33	44

Entry indexentry index	Channel Access Type Channel Access Type	The CP extension Text index defined in Clause 5.3.1 of [4, TS 38.211]The CP extension Text index defined in Clause 5.3.1 of [4, TS 38.211]
00	Type2C-ULChannelAccess　 defined in [clause 4.2.1.2.3 in 37.213]Type2C-ULChannelAccess　 defined in [clause 4.2.1.2.3 in 37.213]	00
1One	Type2C-ULChannelAccess　 defined in [clause 4.2.1.2.3 in 37.213]Type2C-ULChannelAccess　 defined in [clause 4.2.1.2.3 in 37.213]	22
22	Type2B-ULChannelAccess　 defined in [clause 4.2.1.2.3 in 37.213]Type2B-ULChannelAccess　 defined in [clause 4.2.1.2.3 in 37.213]	00
33	Type2B-ULChannelAccess　 defined in [clause 4.2.1.2.3 in 37.213]Type2B-ULChannelAccess　 defined in [clause 4.2.1.2.3 in 37.213]	22
44	Type2A-ULChannelAccess defined in [clause 4.2.1.2.1 in 37.213]Type2A-ULChannelAccess defined in [clause 4.2.1.2.1 in 37.213]	00
55	Type2A-ULChannelAccess defined in [clause 4.2.1.2.1 in 37.213]Type2A-ULChannelAccess defined in [clause 4.2.1.2.1 in 37.213]	1One
66	Type2A-ULChannelAccess defined in [clause 4.2.1.2.1 in 37.213]Type2A-ULChannelAccess defined in [clause 4.2.1.2.1 in 37.213]	33
77	Type1-ULChannelAccess defined in [clause 4.2.1.1 in 37.213]Type1-ULChannelAccess defined in [clause 4.2.1.1 in 37.213]	00
88	Type1-ULChannelAccess defined in [clause 4.2.1.1 in 37.213]Type1-ULChannelAccess defined in [clause 4.2.1.1 in 37.213]	1One
99	Type1-ULChannelAccess defined in [clause 4.2.1.1 in 37.213]Type1-ULChannelAccess defined in [clause 4.2.1.1 in 37.213]	22
1010	Type1-ULChannelAccess defined in [clause 4.2.1.1 in 37.213]Type1-ULChannelAccess defined in [clause 4.2.1.1 in 37.213]	33

Meanwhile, DCI format x_2 (eg DCI format 0_2 or DCI format 1_2) may be introduced in order to increase reliability by variably setting a field and its size in DCI to support the URLLC operation.

In particular, in the case of UL scheduling to the UE through DCI format x_2 in the unlicensed band, channel access parameters including CAT/CPE/CAPC may be indicated, and if the channel access parameter field is set in DCI format x_2, Considering the size, a method to configure the entries to be indicated may be needed. In addition, since data of URLLC can be set for high priority or low priority through the priority indicator, it is also considered to individually set the channel access parameter entry set for high priority and the channel access parameter entry set for low priority through RRC. can

Hereinafter, methods for setting a channel access parameter entry according to the proposed methods of the present disclosure will be described.

Before a full-scale description, an overall operating method of a terminal and a base station according to the proposed methods of the present disclosure will be described with reference to FIGS. 16 to 18 .

16 is a diagram illustrating an overall operation process of a terminal according to the proposed methods of the present disclosure.

Referring to FIG. 16 , the UE may receive information on first channel access parameter entries including some or all of the entries included in the mother table for DCI format x_1 through RRC (S1601). Also, the UE may acquire second channel access parameter entries for DCI format x_2 according to [Proposed Method #1] to [Proposed Method #3] based on the first channel access parameter entries.

Meanwhile, the UE may obtain low priority entries of DCI format x_1 according to [Proposed Method #3].

Also, S1601 may be omitted. That is, the terminal may not receive information about the first channel access parameter entries. In this case, the terminal may obtain the second channel access parameter entries according to [Proposed Method #4] (S1603).

The terminal that has obtained the second channel access parameter entries is instructed by one of the second channel access parameter entries through DCI format x_2. That is, the terminal may receive DCI format x_2 indicating one of the second channel access parameter entries (S1605).

The terminal performs a channel access procedure (eg, LBT (Listen before Talk)) based on the second channel access parameter entry indicated through DCI format x_2 (S1607), and uplink based on the channel access procedure result A signal may be transmitted (S1609).

Now, an overall operation process of a base station for implementing the proposed methods of the present disclosure will be described with reference to FIG. 17 .

Referring to FIG. 17 , the base station may transmit information on first channel access parameter entries including some or all of the entries included in the mother table for DCI format x_1 through RRC (S1701). Also, the base station may acquire second channel access parameter entries for DCI format x_2 according to [Proposed Method #1] to [Proposed Method #3] among the first channel access parameter entries. At this time, according to [Proposed Method #3], low priority entries of DCI format x_1 may be obtained.

In addition, when S1701 is omitted, that is, when the base station does not transmit information about the first channel access parameter entries, the second channel access parameter entries may be obtained according to [Proposed Method #4].

The base station may indicate one of the obtained second channel access parameter entries to the terminal through DCI format x_2 (S1703).

Also, it is possible to receive an uplink signal transmitted based on the indicated second channel access parameter entry (S1705).

Now, an overall operation process of the network according to the proposed methods of the present disclosure will be described with reference to FIG. 18 .

Referring to FIG. 18 , the base station may transmit information about first channel access parameter entries including some or all of the entries included in the mother table for DCI format x_1 to the terminal through RRC (S1801). Also, the UE may acquire second channel access parameter entries for DCI format x_2 according to [Proposed Method #1] to [Proposed Method #3] based on the first channel access parameter entries.

Also, S1801 may be omitted. That is, the terminal may not receive information about the first channel access parameter entries. In this case, the terminal may obtain the second channel access parameter entries according to [Proposed Method #4] (S1803).

The base station may transmit one of the second channel access parameter entries to the terminal through DCI format x_2 (S1805).

The terminal performs a channel access procedure (eg, LBT (Listen before Talk)) based on the second channel access parameter entry indicated through DCI format x_2 (S1807), and uplink based on the channel access procedure result A signal may be transmitted to the base station (S1809).

Hereinafter, we will look at the proposed methods for implementing the overall operation process of the above-described terminal and base station in detail.

[제안 방법 #1][Suggested method #1]

A field for indicating the second channel connection parameter may be set in DCI format x_2 (eg, DCI format 0_2 or DCI format 1_2). In addition, when all or part of CAT (channel access type) / CPE (cyclic prefix extension) / CAPC (channel access priority class) is dynamically indicated through the corresponding field, one of the joint-encoded second channel access parameter entries, A method of setting an entry set for DCI format x_2 may be as follows.

1. 실시 예 #1-11. Example #1-1

All or part of the first channel access parameter entries of the mother table for DCI format x_1 (eg, DCI 0_1 or DCI 1_1) defined in the standard through a higher layer signal such as RRC second channel access for DCI format x_2 It can be set as a set of parameter entries.

Looking at specific examples in this regard,

(One) DCI format except for entries whose CAP is type 1 by the number of entries corresponding to the field width of the second channel access parameter indication field set in DCI format x_2 from the first channel access parameter entry of the mother table for DCI format x_1 It can be set for x_2.

For example, when the second channel access parameter indication field is 2 bits, 4 first channel access parameter entries are added to the second channel for DCI format x_2, except that CAP is type 1 among the first channel access parameter entries. It can be set with connection parameter entries.

At this time, the reason for excluding the entry in which the CAP is type 1 is that in a communication system that requires a low delay such as URLLC, a CAP method that requires a relatively long time for LBT such as CAP type 1 may not be preferred. Accordingly, the second channel access parameter entries may be determined excluding the first channel access parameter entries that are CAP type 1 .

(2) First channel access with CAPC=1 by the number of entries corresponding to the field width of the second channel access parameter indication field set in DCI format x_2 from the first channel access parameter entries of the mother table for DCI format x_1 Only parameter entries may be set as second channel access parameter entries for DCI format x_2.

For example, when the second channel access parameter indication field is 2 bits, among the first channel access parameter entries, four first channel access parameter entries with CAPC=1 are used as second channel access parameter entries for DCI format x_2. can be set.

At this time, the reason for setting only the first channel access parameter entries with CAPC = 1 as the second channel access parameter entry is that the smaller the CAPC value, the higher the likelihood that a smaller CWS value will be selected, and the time it takes to perform the LBT is relatively short. The probability is high. Therefore, in a communication system requiring low latency, such as URLLC, since an entry with CAPC=1 may be most efficient, only the first channel access parameter entries with CAPC=1 can be set as the second channel access parameter.

(3) From the first channel access parameter entry of the mother table for DCI format x_1, CPE = 0 by the number of entries corresponding to the field width of the second channel access parameter indication field set in DCI format x_2, except for entries It can be set as second channel access parameter entries for DCI format x_2.

For example, when the second channel access parameter indication field is 2 bits, 4 first channel access parameter entries except for CPE=0 among the first channel access parameter entries are added to the second channel access parameter entry for DCI format x_2 can be set to

At this time, the reason for excluding the first channel access parameter entry with CPE=0 is that, in a communication system requiring low delay such as URLLC, it is good that the transmission of the signal is guaranteed as much as possible. Therefore, since CPE=0 may lower the probability of guaranteeing signal transmission, the first channel access parameter except for CPE=0 may be set as the second channel access parameter entries.

(4) Combining some or all of the above-described methods (1) to (3) to set the second channel access parameter entry set for DCI format x_2 from the first channel access parameter entry of the mother table for DCI format x_1 can

2. 실시 예 #1-22. Example #1-2

The entire set of first channel access parameter entries for DCI format x_1 set through a higher layer signal such as RRC may be used as it is as second channel access parameter entries for DCI format x_2.

3. 실시 예 #1-33. Example #1-3

Some entries of the first channel access parameter entry set set for DCI format x_1 through a higher layer signal such as RRC may be set as second channel access parameter entries for DCI format x_2 as follows.

(1) Among the first channel access parameter entries set for DCI format x_1 by the number of entries corresponding to the field width of the second channel access parameter indication field set in DCI format x_2, in ascending order from lowest index or highest index A second channel access parameter entry set for DCI format x_2 may be configured in descending order from .

For example, when 8 first channel access parameter entries of #0 to #7 are set through RRC and the number of bits of the second channel access parameter indication field for DCI format x_2 is 2 bits, from the lowest index to ascending order You can use the first channel access parameter entries of #0~#3 as the second channel access parameter entry, or use the first channel access parameter entries of #4~#7 in descending order from the highest index as the second channel access parameter entry. have.

(2) The number of entries corresponding to the field width of the second channel access parameter indication field set in DCI format x_2 is the number of entries in which the CAP is type 1 among the first channel access parameter entries set for DCI format x_1, except for entries and can be used as second channel access parameter entries for DCI format x_2.

(3) The first channel access with CAPC=1 among the first channel access parameter entries set for DCI format x_1 by the number of entries corresponding to the field width of the second channel access parameter indication field set in DCI format x_2 Only the parameter entry can be used as the second channel access parameter entry for DCI format x_2.

At this time, the reason for setting only the first channel access parameter entries with CAPC = 1 as the second channel access parameter entry is that the smaller the CAPC value, the higher the likelihood that a smaller CWS value will be selected, and the time it takes to perform the LBT is relatively short. Therefore, in a communication system requiring low latency such as URLLC, since the entry with CAPC=1 can be most efficient, only the first channel access parameter entries with CAPC=1 can be set as the second channel access parameter. have.

(4) CPE = 0 among the first channel access parameter entries set for DCI format x_1 by the number of entries corresponding to the field width of the second channel access parameter indication field set in DCI format x_2, except for entries It can be used as second channel access parameter entries for DCI format x_2.

(5) A second channel access parameter entry set for DCI format x_2 may be determined and used by combining some or all of the above-described methods (1) to (4).

On the other hand, for example, in [Proposed Method #1], the meaning of the number of entries corresponding to the field width of the second channel access parameter indication field set in DCI format x_2 is the second channel access parameter of DCI format x_2 When the meter indication field is y bits, 2^y entries in the order of lowest index or 2^y entries in the order of highest index among the N first channel access parameter entries set for DCI format x_1 are first for DCI format x_2 It may mean using as a 2-channel access parameter entry.

[Suggested method #1] is a method for instructing the UE to CAT/CPE/CAPC through the second channel access parameter field in DCI format x_2. As in Example #1-1, DCI format defined in standard document TS 38.212 It can be indicated using the mother table of the first channel access parameter for x_1. For example, specific entries among entries of the mother table of the first channel access parameter for DCI format x_1 may be set as the second channel access parameter entry set for DCI format x_2 from the base station through a higher layer signal such as RRC. have. At this time, the methods of (1) to (4) of embodiment #1-1 select the second channel access parameter entries for DCI format x_2 from among the entries of the mother table of the first channel access parameter for DCI format x_1 can be applied when

Embodiment #1-2 sets the first channel access parameter entry (eg, CAT/CPE/CAPC entry) set for DCI format x_1 through a higher layer signal such as RRC, and the second channel access parameter for DCI format x_2 is used in the same way as When the base station sets the first channel access parameter entry set for DCI format x_1 to the terminal, the terminal can apply the corresponding entry set to DCI format x_2 in the same way and use it. For example, the first channel access parameter entry set configured for DCI format 0_1 may be equally used as the second channel access parameter entry set for DCI format 0_2. Also, the first channel access parameter entry set configured for DCI format 1_1 may be equally used as the second channel access parameter entry set for DCI format 1_2.

In Example #1-3, among the first channel access parameter entries of the mother table for DCI format x_1, when the first channel access parameter entry sets that can be indicated by DCI through RRC are configured, some of the corresponding entry sets For entries, one of (1) to (5) of Example #1-3 may be applied to configure a second channel access parameter entry set for DCI format x_2. For example, it is assumed that the first channel access parameter entry set configured for DCI format x_1 consists of a total of 8 entries from indices 0 to 7. At this time, if the number of bits of the second channel access parameter included in DCI format x_2 is 2 bits, the entries from 0 to 3 in the order of the lowest index among 7 entries in the set index 0 entry are the first for DCI format x_2. It can be used as 2 channel access parameter entries. Alternatively, index entries 7 to 4 in the order of the highest index may be used as the second channel access parameter entries for DCI format x_2.

Alternatively, as in Example #1-3 (2), in the first channel access parameter entry set set for DCI format x_1, except for entries in which CAT is LBT type 1, it is indicated by the second channel access parameter field of DCI format x_2 The number of possible entries may be used as the second channel access parameter entry for DCI format x_2 in order. On the other hand, in this case, in combination with embodiment #1-3 (1), except for entries that are LBT type1, the second channel access parameter entries can be configured in ascending order from the lowest index or in descending order from the highest index.

Alternatively, by applying embodiment #1-3 (3), the second channel access parameter entry may be configured based on only entries having CAPC=1 among the first channel access parameter entry set for DCI format x_1. Even in this case, in combination with Example #1-3 (1), among entries with CAPC=1, the second channel access parameter entries may be configured in ascending order from the lowest index or in descending order from the highest index.

Alternatively, by applying embodiment #1-3 (4), the second channel access parameter entry set for DCI format x_2 may be configured except for the entry having CPE=0. Even in this case, in combination with Example #1-3 (1), the second channel access parameter entries may be configured in ascending order from the lowest index or in descending order from the highest index, excluding the entry having CPE=0.

Meanwhile, at least one of embodiments #1-3 (1) to (4) may be combined to configure the second channel access parameter entry, for example, embodiments #1-3 (2) and (3) If this is combined, it is possible to configure the second channel access parameter entries based on the first channel access parameter entries with CAPC = 1 among those that are not LBT type 1. However, this is only one example, and Examples #1-3 (1) to (4) may be implemented by combining two or more examples in a manner similar to the above-described example.

[제안 방법 #2][Suggested method #2]

A second channel access parameter indication field is set in DCI format x_2 (eg DCI format 0_2 or DCI format 1_2), and CAT (channel access type) / CPE (cyclic prefix extension) / CAPC (channel access priority class) ) When all or part of one of the joint-encoded entries is dynamically indicated, let's look at how to configure the second channel access parameter entry set for high priority and the second channel access parameter entry set for low priority. do.

1. 실시 예 #2-11. Example #2-1

Some entries among the first channel access parameter entry sets set for high priority of DCI format x_1 through a higher layer signal such as RRC may be configured as second channel access parameter entries for high priority of DCI format x_2. In addition, some entries among the first channel access parameter entry set set for low priority of DCI format x_1 may be configured as second channel access parameter entry for low priority of DCI format x_2. The specific method for this is as follows.

(1) High priority first channel access parameter entry set and low priority first set for DCI format x_1 by the number of entries corresponding to the field width of the channel access parameter indication field set for each priority in DCI format x_2 From the channel access parameter entry set, in ascending order from the lowest index or from the highest index in descending order, a second channel access parameter entry set for high priority of DCI format x_2 and a second channel access parameter entry set for low priority of DCI format x_2 are configured, respectively. can do.

(2) The first channel access parameter entry set for high priority set for DCI format x_1 and low priority by the number of entries corresponding to the field width of the second channel access parameter indication field set for each priority in DCI format x_2 Except for entries whose CAP is type 1 from the first channel access parameter entry set for Each can be configured.

(3) The first channel access parameter entry set for high priority set for DCI format x_1 and low priority by the number of entries corresponding to the field width of the second channel access parameter indication field set for each priority in DCI format x_2 Only the entry with CAPC = 1 from the first channel access parameter entry set for DCI format x_2 configures the second channel access parameter entry set for high priority and the second channel access parameter entry set for low priority of DCI format x_2, respectively. can

(4) The first channel access parameter entry set for high priority set for DCI format x_1 and low priority by the number of entries corresponding to the field width of the second channel access parameter indication field set for each priority in DCI format x_2 From the first channel access parameter entry set for entry, except for entries with CPE = 0, the second channel access parameter entry set for high priority of DCI format x_2 and the second channel access parameter entry set for low priority of DCI format x_2 Each can be configured.

(5) A second channel access parameter entry set for high priority of DCI format x_2 and a second for low priority of DCI format x_2 by combining some or all of (1) to (4) of embodiment #2-1 A channel access parameter entry set can be configured.

2. 실시 예 #2-22. Example #2-2

The entire first channel access parameter entry set for high priority of DCI format x_1 set through a higher layer signal such as RRC can be used equally as the second channel access parameter entry set for high priority of DCI format x_2. Similarly, the entire first channel access parameter entry set for low priority of DCI format x_1 may be equally used as the second channel access parameter entry set for low priority of DCI format x_2.

On the other hand, for example, in [Proposed Method #2], the meaning of the number of entries corresponding to the field width of the second channel access parameter indication field set for each priority in DCI format x_2 is high priority of DCI format x_2 When the 2nd channel access parameter indication field for y is y bit, 2^y in the order of lowest index or 2^y in the order of highest index among N first channel access parameter entries set for high priority of DCI format x_1 This may mean using only n entries as the second channel access parameter entry set for high priority of DCI format x_2.

[Suggested method #2] will be described in detail. If the terminal is from the base station, among the first channel access parameter entries of the mother table for DCI format x_1, the first channel access parameter entry set for high priority that can be indicated by DCI through RRC and the first channel access for low priority When each parameter entry set is set, the second channel access parameter entry for low priority of DCI format x_2 by applying one of embodiments #2-1 (1) to (5) to some entries among the entry sets for each priority It can be configured as a set or a second channel access parameter entry set for high priority.

For example, it is assumed that the first channel access parameter entry set configured for high priority of DCI format x_1 consists of a total of 8 entries from index 0 to index 7. If the number of bits of the second channel access parameter included in DCI format x_2 is 2 bits, by applying Example #2-1 (1), the lowest index order among entries 7 from entry 0 to entry 0 is applied. The first channel access parameter entry up to index 3 may be used as the second channel access parameter entry set for high priority of DCI format x_2. Alternatively, index entries 7 to 4 in the order of the highest index may be used as the second channel access parameter entry set for high priority of DCI format x_2.

In addition, in the first channel access parameter entry set for high priority and the first channel access parameter entry set for low priority set for DCI format x_1 as in Example #2-1 (2), CAT is LBT type 1 A second channel access parameter entry set for high priority of DCI format x_2 and a second channel for low priority of DCI format x_2 by the number of entries that can be indicated by the second channel access parameter field for each priority of DCI format x_2 except for entries Each can be used as a set of connection parameter entry.

Alternatively, by applying Example #2-1 (3), only the entry with CAPC=1 among the first channel access parameter entry set for high priority and the first channel access parameter entry set for low priority of DCI format x_1 is DCI format x_2 A second channel access parameter entry set for high priority and a second channel access parameter entry set for low priority can be configured, respectively.

Alternatively, by applying Example #2-1 (4), CPE = 0 of the first channel access parameter entry set for high priority and the first channel access parameter entry set for low priority of DCI format x_1, except for the entry A second channel access parameter entry set for high priority and a second channel access parameter entry set for low priority of DCI format x_2 may be configured.

As another method, as in Example #2-2, a first channel access parameter entry set for high priority of DCI format x_1 set through a higher layer signal such as RRC and a first channel access parameter entry for low priority of DCI format x_1 The entire set may be equally used as the second channel access parameter entry set for high priority of DCI format x_2 and the second channel access parameter entry set for low priority of DCI format x_2, respectively. For example, a first channel access parameter entry set configured for high priority of DCI format 0_1 may be used equally as a second channel access parameter entry set configured for high priority of DCI format 0_2. Alternatively, the first channel access parameter entry set set for high priority of DCI format 1_1 may be equally used as the second channel access parameter entry set for high priority of DCI format 1_2.

[제안 방법 #3][Suggested method #3]

A channel access parameter indication field is set in a specific DCI format (DCI format x_1 or DCI format x_2), and all or part of CAT (channel access type) / CPE (cyclic prefix extension) / CAPC (channel access priority class) When one of the joint-encoded entries is dynamically indicated, a channel access parameter entry set for low priority can be configured from the channel access parameter entry set set for high priority of the corresponding DCI format.

1. 실시 예 #3-11. Example #3-1

Some entries among the channel access parameter entry sets set for high priority of a specific DCI format x_1 (or DCI format x_2) through a higher layer signal such as RRC are channeled for low priority of DCI format x_1 (or DCI format x_2) It can be configured with parameters. The specific method for this is as follows.

(1) DCI format x_1 (or DCI format x_2) channel configured for high priority by the number of entries corresponding to the field width of the channel access parameter indication field for high priority of DCI format x_1 (or DCI format x_2) From the access parameter entry set, a channel access parameter entry set for DCI format x_1 (or DCI format x_2) low priority can be configured in ascending order from the lowest index or in descending order from the highest index.

(2) High priority set for DCI format x_1 (or DCI format x_2) by the number of entries corresponding to the field width of the channel access parameter indication field set for high priority of DCI format x_1 (or DCI format x_2) It can be used as a channel access parameter entry set for low priority for DCI format x_1 (or DCI format x_2) except for entries whose CAP is type 1 from the channel access parameter entry set for DCI format x_1 (or DCI format x_2).

At this time, the reason for excluding the entry in which the CAP is type 1 is that for data for low priority, a CAP method that requires a relatively long time for LBT, such as CAP type1, may not be preferred. Accordingly, among the channel access parameter entries for high priority, channel access parameter entries for low priority may be determined except for channel access parameter entries of CAP type 1 .

(3) High set for DCI format x_1 (or DCI format x_2) by the number of entries corresponding to the field width of the channel access parameter indication field set for high priority of DCI format x_1 (or DCI format x_2) From the channel access parameter entry set for priority, an entry set for low priority of DCI format x_1 (or DCI format x_2) can be configured only by an entry with CAPC=1.

At this time, the reason for setting the channel access parameter entry only with the first channel access parameter entries with CAPC = 1 is that the smaller the CAPC value, the higher the likelihood that a smaller CWS value will be selected, and the probability that the time taken to perform the LBT is relatively short. Therefore, in data transmission set to low priority, since the entry with CAPC=1 can be the most efficient, among the channel access parameter entries for high priority, only the channel access parameter entries with CAPC=1 are set to low priority. It can be set as a channel access parameter entry for

(4) DCI format x_1 (or DCI format x_2) as much as the number of entries corresponding to the field width of the channel access parameter indication field set for high priority in DCI format x_1 (or DCI format x_2) High priority set by understanding DCI format x_1 (or DCI format x_2) It can be used as a channel access parameter entry set for low priority of DCI format x_1 (or DCI format x_2) except for entries with CPE=0 in the channel access parameter entry set of .

At this time, the reason for excluding the channel access parameter entry with CPE=0 is to ensure transmission of a low priority signal as much as possible. Therefore, since CPE=0 may lower the probability of guaranteeing signal transmission, channel access parameter entries except for CPE=0 may be set as channel access parameter entries for low priority.

(5) DCI format from the channel access parameter entry set for high priority of DCI format x_1 (or DCI format x_2) by combining some or all of the methods (1) to (4) of Example #3-1 A channel access parameter entry set for low priority of x_1 (or DCI format x_2) can be configured.

2. 실시 예 #3-22. Example #3-2

The entire channel access parameter entry set for high priority of DCI format x_1 (or DCI format x_2) set through a higher layer signal such as RRC is set as a channel access parameter entry set for low priority of DCI format x_1 (or DCI format x_2). can be used in the same way.

For example, in [Proposed Method #3], the meaning of the number of entries corresponding to the field width of the channel access parameter indication field set for low priority of DCI format x_1 (or DCI format x_2) is DCI format x_1 When the channel access parameter indication field for low priority of (or DCI format x_2) is y bit, DCI format x_1 (or DCI format x_2) among N channel access parameter entries set for high priority 2^ in the order of the lowest index This may mean using only 2^y entries in the order of y or highest index as a channel access parameter entry set for low priority of DCI format x_1 (or DCI format x_2).

Let's take a closer look at [Suggested method #3].

If, from the base station, a channel access parameter entry set for high priority that can be indicated in a specific DCI format through RRC is configured for the terminal, some or all of the entries in the channel access parameter entry set configured for high priority are set in embodiment #3 Based on one of the methods (1) to (5) of -1, it can be configured as a channel access parameter entry set for the low priority of the specific DCI format.

For example, it is assumed that the channel access parameter entry set configured for high priority of DCI format x_1 consists of a total of 8 entries from index 0 to 7. If the number of bits of the channel access parameter field included in the DCI format is 2 bits, based on Example #3-1 (1), the lowest index of entries 0 to 7 in the set index entry 0 to 3 The entry up to index can be used as a channel access parameter entry set for low priority of DCI format x_1. Alternatively, index entries 7 to 4 in the order of the highest index may be used as a channel access parameter entry set for low priority of DCI format x_1.

Or, in the channel access parameter entry set for high priority set for DCI format x_1 as in Example #3-1 (2), except for entries in which CAT is LBT type 1, a channel for low priority of DCI format x_1 As many entries as can be indicated by the access parameter field may be used as the channel access parameter entry set for low priority of DCI format x_1.

Alternatively, based on Example #3-1 (3), only an entry with CAPC=1 among the entry sets for high priority of DCI format x_1 may be used as a channel access parameter entry set for low priority of DCI format x_1.

Alternatively, based on Example #3-1 (4), it may be used as a channel access parameter entry set for low priority of DCI format x_1 except for an entry with CPE = 0 among the entry set for high priority of DCI format x_1 have.

As another method, as in Example #3-2, the entire channel access parameter entry set for high priority of DCI format x_1 (or DCI format x_2) configured through a higher layer signal such as RRC is DCI format x_1 (or DCI format It can be equally used as a channel access parameter entry set for low priority of x_2).

[제안 방법 #4] [Suggested method #4]

The channel access parameter indication field is not set in DCI format x_2 (eg DCI format 0_2 or DCI format 1_2), or there is no DCI format x_1 itself, or the channel access parameter entry set for DCI format x_1 is set with RRC and Indicate one of the joint-encoded channel access parameter entries in which all or part of CAT (channel access type) / CPE (cyclic prefix extension) / CAPC (channel access priority class) is not configured through the same higher layer signal Let's take a look at how to do it.

1. 실시 예 #4-11. Example #4-1

Based on the field width of the second channel access parameter indication field set in DCI format x_2, some or all entries in the channel access parameter entry table for DCI format x_0 may be used as channel access parameters for DCI format x_2 .

(1) When the width of the second channel access parameter indication field set in DCI format x_2 is 1 bit, among the entries included in the channel access parameter entry table for DCI format x_0, two specific entries defined in the standard or Two entries set/indicated by the base station in advance may be used as channel access parameter entries for DCI format x_2.

(2) When the width of the second channel access parameter indication field configured for DCI format x_2 is 0 bits, among the entries included in the channel access parameter entry table for DCI format x_0, one specific entry defined in the standard Alternatively, one entry set/indicated by the base station in advance may be used as the second channel access parameter etnry.

(3) When the width of the second channel access parameter indication field set for DCI format x_2 is 2 bits, 4 entries defined in the standard in the channel access parameter entry table for DCI format x_0 are the same for DCI format x_2 can be used

In this case, the method of determining the second channel access parameter entry set to be used for DCI x_2 in the channel access parameter entry table for DCI format x_0 is (1) to (1) to ( 4) can be based on

In addition, according to the priority, a second channel access parameter entry for high priority of DCI format x_2 and a second channel access parameter entry for low priority of DCI format x_2 may be configured differently. In this case, the second channel access parameter entry corresponding to the corresponding priority may be used according to the priority indicator set in DCI format x_2. If the priority indicator is not set, the second channel access parameter entry for low priority may be used as a default. Characteristically, even when the first channel access parameter entry set for DCI format x_1 is configured through RRC, as described above, the second channel access parameter entry set of DCI format x_2 can be configured using the mother table for fallback DCI. have.

Specifically, let's take a look at [Suggested method #4].

Standard TS 38.212 defines a mother table for fallback DCI (DCI format 0_0 or DCI format 1_0). In addition, one of the channel access parameter entries of the corresponding mother table is indicated through the channel access parameter field of DCI format x_0. Some or all of the channel access parameter entries of the mother table for DCI format x_0 may be used as the second channel access parameter entry set for DCI format x_2.

On the other hand, when selecting the second channel access parameter entry for DCI format x_2 from the mother table for Fallback DCI, according to the width of the second channel access parameter indication field set in DCI format x_2, embodiments #4-1 (1) to It can be selected based on (3).

When the width of the second channel access parameter indication field set in DCI format x_2 is 1 bit, two specific channel access parameter entries defined in the standard in the channel access parameter entry table for DCI format x_0 or set/indicated from the base station in advance The received two channel access parameter entries may be used as the second channel access parameter for DCI format x_2.

Alternatively, when the width of the second channel access parameter indication field set in DCI format x_2 is 0 bits, one specific channel access parameter entry defined in the standard in the channel access parameter entry table for DCI format x_0 or set by the base station in advance One channel access parameter entry indicated by / can be used.

Alternatively, when the width of the second channel access parameter indication field set in DCI format x_2 is 2 bits, 4 entries defined in the standard in the channel access parameter entry table for DCI format x_0 are added to the second channel for DCI format x_2. The same can be used as a connection parameter entry.

Meanwhile, the methods of the above-described embodiment #4-1 may be applied even when the first channel access parameter entry set for DCI format x_1 is configured through RRC.

Also, according to the priority, the second channel access parameter entry set for high priority of DCI format x_2 and the second channel access parameter entry set for low priority of DCI format x_2 may be different from each other. A corresponding second channel access parameter entry set is used according to the priority indicator in DCI format x_2, and if the priority indicator is not set, the second channel access parameter for low priority may be used as a default.

Since examples of the above-described proposed method may also be included as one of the implementation methods of the present invention, it is obvious that they may be regarded as a kind of proposed method. In addition, the above-described proposed methods may be implemented independently, but may also be implemented in the form of a combination (or merge) of some of the proposed methods. For example, Examples #1-1 (1) to (5), Examples #1-2, and Examples #1-3 (1) to (5) of [Proposed Method #1], [Suggested Method # 2] Example #2-1 (1) to (5), Example #2-2, Example #3-1 (1) to (5) of [Proposed Method #3], Example #3- Among Examples #4-1 (1) to (3) of 2 and [Proposed Method #4], one example may be implemented independently, or two or more may be implemented in combination.

For example, after configuring the first channel access parameter entry set for low priority of DCI format x_1 from the first channel access parameter entry set for high priority of DCI format x_1 according to [Proposed method #3], [Proposed method #2], configure a second channel access parameter entry set for high priority of DCI format x_2 from the first channel access parameter entry set for high priority of DCI format x_1, and first for low priority of DCI format x_1 A second channel access parameter entry set for low priority of DCI format x_2 may be configured from the 1 channel access parameter entry set.

As another example, according to [Proposed Method #2], a second channel connection parameter entry set for high priority of DCI format x_2 is configured from the first channel connection parameter entry set for high priority of DCI format x_1, and [Suggested method #3], a second channel access parameter entry set for low priority of DCI format x_2 may be configured from the second channel access parameter entry set for high priority of DCI format x_2.

Information on whether the proposed methods are applied (or information on the rules of the proposed methods) is notified by the base station to the terminal or the transmitting terminal to the receiving terminal through a predefined signal (eg, a physical layer signal or a higher layer signal). Rules can be defined to

Although not limited thereto, the various descriptions, functions, procedures, suggestions, methods, and/or operation flowcharts of the present invention disclosed in this document may be applied to various fields requiring wireless communication/connection (eg, 5G) between devices. have.

Hereinafter, it will be exemplified in more detail with reference to the drawings. In the following drawings/descriptions, the same reference numerals may represent the same or corresponding hardware blocks, software blocks, or functional blocks, unless otherwise indicated.

19 illustrates a communication system 1 applied to the present invention.

Referring to FIG. 19 , the communication system 1 applied to the present invention includes a wireless device, a base station, and a network. Here, the wireless device refers to a device that performs communication using a radio access technology (eg, 5G NR (New RAT), LTE (Long Term Evolution)), and may be referred to as a communication/wireless/5G device. Although not limited thereto, the wireless device may include a robot 100a, a vehicle 100b-1, 100b-2, an eXtended Reality (XR) device 100c, a hand-held device 100d, and a home appliance 100e. ), an Internet of Thing (IoT) device 100f, and an AI device/server 400 . For example, the vehicle may include a vehicle equipped with a wireless communication function, an autonomous driving vehicle, a vehicle capable of performing inter-vehicle communication, and the like. Here, the vehicle may include an Unmanned Aerial Vehicle (UAV) (eg, a drone). XR devices include AR (Augmented Reality)/VR (Virtual Reality)/MR (Mixed Reality) devices, and include a Head-Mounted Device (HMD), a Head-Up Display (HUD) provided in a vehicle, a television, a smartphone, It may be implemented in the form of a computer, a wearable device, a home appliance, a digital signage, a vehicle, a robot, and the like. The portable device may include a smart phone, a smart pad, a wearable device (eg, a smart watch, smart glasses), a computer (eg, a laptop computer), and the like. Home appliances may include a TV, a refrigerator, a washing machine, and the like. The IoT device may include a sensor, a smart meter, and the like. For example, the base station and the network may be implemented as a wireless device, and the specific wireless device 200a may operate as a base station/network node to other wireless devices.

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

Wireless communication/

connection

150a, 150b, and 150c may be performed between the wireless devices 100a to 100f/base station 200 and the base station 200/base station 200 . Here, the wireless communication/connection includes uplink/downlink communication 150a and sidelink communication 150b (or D2D communication), and communication between base stations 150c (eg relay, IAB (Integrated Access Backhaul)). This can be done through technology (eg 5G NR) Wireless communication/

connection

150a, 150b, 150c allows the wireless device and the base station/radio device, and the base station and the base station to transmit/receive wireless signals to each other. For example, the wireless communication/

connection

150a, 150b, and 150c may transmit/receive signals through various physical channels.To this end, based on various proposals of the present invention, At least some of various configuration information setting processes, various signal processing processes (eg, channel encoding/decoding, modulation/demodulation, resource mapping/demapping, etc.), resource allocation processes, etc. may be performed.

20 illustrates a wireless device applicable to the present invention.

Referring to FIG. 20 , the first wireless device 100 and the second wireless device 200 may transmit/receive wireless signals through various wireless access technologies (eg, LTE, NR). Here, {first wireless device 100, second wireless device 200} is {wireless device 100x, base station 200} of FIG. 19 and/or {wireless device 100x, wireless device 100x) } can be matched.

The first wireless device 100 includes one or more processors 102 and one or more memories 104 , and may further include one or more transceivers 106 and/or one or more antennas 108 . The processor 102 controls the memory 104 and/or the transceiver 106 and may be configured to implement the descriptions, functions, procedures, suggestions, methods, and/or operational flowcharts disclosed herein. For example, the processor 102 may process information in the memory 104 to generate first information/signal, and then transmit a wireless signal including the first information/signal through the transceiver 106 . In addition, the processor 102 may receive the radio signal including the second information/signal through the transceiver 106 , and then store information obtained from signal processing of the second information/signal in the memory 104 . The memory 104 may be connected to the processor 102 and may store various information related to the operation of the processor 102 . For example, memory 104 may provide instructions for performing some or all of the processes controlled by processor 102 , or for performing descriptions, functions, procedures, suggestions, methods, and/or operational flowcharts disclosed herein. may store software code including Here, the processor 102 and the memory 104 may be part of a communication modem/circuit/chip designed to implement a wireless communication technology (eg, LTE, NR). The transceiver 106 may be coupled to the processor 102 , and may transmit and/or receive wireless signals via one or more antennas 108 . The transceiver 106 may include a transmitter and/or a receiver. The transceiver 106 may be used interchangeably with a radio frequency (RF) unit. In the present invention, a wireless device may refer to a communication modem/circuit/chip.

Specifically, commands and/or operations controlled by the processor 102 of the first wireless device 100 and stored in the memory 104 according to an embodiment of the present invention will be described.

The following operations are described based on the control operation of the processor 102 from the perspective of the processor 102, but may be stored in the memory 104, such as software code for performing these operations. For example, in the present disclosure, the at least one memory 104 is a computer-readable storage medium, which can store instructions or programs, which, when executed, are At least one processor operably connected to at least one memory may cause operations according to embodiments or implementations of the present disclosure related to the following operations.

Specifically, the processor 102 may control the transceiver 106 to receive information about the first channel access parameter entries including some or all of the entries included in the mother table for DCI format x_1 through RRC. . Also, the processor 102 may acquire second channel access parameter entries for DCI format x_2 according to [Proposed Method #1] to [Proposed Method #3] based on the first channel access parameter entries.

Meanwhile, the processor 102 may obtain low priority entries of DCI format x_1 according to [Proposed Method #3].

Also, the processor 102 may not receive information about the first channel connection parameter entries. In this case, the processor 102 may obtain the second channel access parameter entries according to [Proposed Method #4].

The processor 102 that has obtained the second channel access parameter entries may control the transceiver 106 to receive one of the second channel access parameter entries through DCI format x_2. That is, the processor 102 may control the transceiver 106 to receive the DCI format x_2 indicating one of the second channel access parameter entries.

The processor 102 performs a channel access procedure (eg, LBT (Listen before Talk)) based on the second channel access parameter entry indicated through DCI format x_2, and uplink based on the channel access procedure result The transceiver 106 may be controlled to transmit a signal.

The second wireless device 200 includes one or more processors 202 , one or more memories 204 , and may further include one or more transceivers 206 and/or one or more antennas 208 . The processor 202 controls the memory 204 and/or the transceiver 206 and may be configured to implement the descriptions, functions, procedures, suggestions, methods, and/or flow charts disclosed herein. For example, the processor 202 may process the information in the memory 204 to generate third information/signal, and then transmit a wireless signal including the third information/signal through the transceiver 206 . In addition, the processor 202 may receive the radio signal including the fourth information/signal through the transceiver 206 , and then store information obtained from signal processing of the fourth information/signal in the memory 204 . The memory 204 may be connected to the processor 202 and may store various information related to the operation of the processor 202 . For example, the memory 204 may provide instructions for performing some or all of the processes controlled by the processor 202, or for performing the descriptions, functions, procedures, suggestions, methods, and/or operational flowcharts disclosed herein. may store software code including Here, the processor 202 and the memory 204 may be part of a communication modem/circuit/chip designed to implement a wireless communication technology (eg, LTE, NR). The transceiver 206 may be coupled to the processor 202 and may transmit and/or receive wireless signals via one or more antennas 208 . The transceiver 206 may include a transmitter and/or a receiver. The transceiver 206 may be used interchangeably with an RF unit. In the present disclosure, a wireless device may refer to a communication modem/circuit/chip.

Specifically, commands and/or operations controlled by the processor 202 of the second wireless device 200 and stored in the memory 204 according to an embodiment of the present invention will be described.

The following operations are described based on the control operation of the processor 202 from the perspective of the processor 202, but may be stored in the memory 204, such as software code for performing these operations. For example, in the present disclosure, the at least one memory 204 is a computer-readable storage medium that can store instructions or programs, which, when executed, are At least one processor operably connected to at least one memory may cause operations according to embodiments or implementations of the present disclosure related to the following operations.

Specifically, the processor 202 may control the transceiver 206 to transmit information about first channel access parameter entries including some or all of the entries included in the mother table for DCI format x_1 through RRC. . Also, the processor 202 may obtain second channel access parameter entries for DCI format x_2 according to [Proposed Method #1] to [Proposed Method #3] among the first channel access parameter entries. At this time, according to [Proposed Method #3], low priority entries of DCI format x_1 may be obtained.

In addition, when the transceiver 206 is controlled so that the processor 202 does not transmit information about the first channel access parameter entries, the second channel access parameter entries may be obtained according to [Proposed Method #4].

The processor 202 may control the transceiver 206 to indicate one of the obtained second channel access parameter entries to the terminal through DCI format x_2.

In addition, the transceiver 206 may be controlled to receive the uplink signal transmitted based on the indicated second channel access parameter entry.

Hereinafter, hardware elements of the

wireless devices

100 and 200 will be described in more detail. Although not limited thereto, one or more protocol layers may be implemented by one or

more processors

102 , 202 . For example, one or

more processors

102 , 202 may implement one or more layers (eg, functional layers such as PHY, MAC, RLC, PDCP, RRC, SDAP). The one or

more processors

102, 202 are configured to process one or more Protocol Data Units (PDUs) and/or one or more Service Data Units (SDUs) according to the description, function, procedure, proposal, method, and/or operational flowcharts disclosed herein. can create One or

more processors

102 , 202 may generate messages, control information, data, or information according to the description, function, procedure, proposal, method, and/or flow charts disclosed herein. The one or

more processors

102 and 202 generate a signal (eg, a baseband signal) including PDUs, SDUs, messages, control information, data or information according to the functions, procedures, proposals and/or methods disclosed herein. , to one or

more transceivers

106 and 206 . The one or

more processors

102 , 202 may receive signals (eg, baseband signals) from one or

more transceivers

106 , 206 , and may be described, functions, procedures, proposals, methods, and/or operational flowcharts disclosed herein. PDUs, SDUs, messages, control information, data, or information may be acquired according to the fields.

One or

more processors

102, 202 may be referred to as a controller, microcontroller, microprocessor, or microcomputer. One or

more processors

102 , 202 may be implemented by hardware, firmware, software, or a combination thereof. For example, one or more Application Specific Integrated Circuits (ASICs), one or more Digital Signal Processors (DSPs), one or more Digital Signal Processing Devices (DSPDs), one or more Programmable Logic Devices (PLDs), or one or more Field Programmable Gate Arrays (FPGAs) may be included in one or

more processors

102 , 202 . The descriptions, functions, procedures, suggestions, methods, and/or flowcharts of operations disclosed in this document may be implemented using firmware or software, and the firmware or software may be implemented to include modules, procedures, functions, and the like. The descriptions, functions, procedures, suggestions, methods, and/or flow charts disclosed in this document provide that firmware or software configured to perform is contained in one or

more processors

102 , 202 , or stored in one or

more memories

104 , 204 . It may be driven by the

above processors

102 and 202 . The descriptions, functions, procedures, proposals, methods, and/or flowcharts of operations disclosed herein may be implemented using firmware or software in the form of code, instructions, and/or a set of instructions.

One or

more memories

104 , 204 may be coupled with one or

more processors

102 , 202 , and may store various forms of data, signals, messages, information, programs, code, instructions, and/or instructions. The one or

more memories

104 and 204 may be comprised of ROM, RAM, EPROM, flash memory, hard drives, registers, cache memory, computer readable storage media, and/or combinations thereof. One or

more memories

104 , 204 may be located inside and/or external to one or

more processors

102 , 202 . Additionally, one or

more memories

104 , 204 may be coupled to one or

more processors

102 , 202 through various technologies, such as wired or wireless connections.

One or

more transceivers

106 , 206 may transmit user data, control information, radio signals/channels, etc. referred to in the methods and/or operational flowcharts of this document to one or more other devices. One or

more transceivers

106, 206 may receive user data, control information, radio signals/channels, etc. referred to in the descriptions, functions, procedures, suggestions, methods and/or flow charts, etc. disclosed herein, from one or more other devices. have. For example, one or

more transceivers

106 , 206 may be coupled to one or

more processors

102 , 202 and may transmit and receive wireless signals. For example, one or

more processors

102 , 202 may control one or

more transceivers

106 , 206 to transmit user data, control information, or wireless signals to one or more other devices. In addition, one or

more processors

102 , 202 may control one or

more transceivers

106 , 206 to receive user data, control information, or wireless signals from one or more other devices. Further, one or

more transceivers

106, 206 may be coupled to one or

more antennas

108, 208, and the one or

more transceivers

106, 206 may be coupled via one or

more antennas

108, 208 to the descriptions, functions, and functions disclosed herein. , may be set to transmit and receive user data, control information, radio signals/channels, etc. mentioned in procedures, proposals, methods and/or operation flowcharts. In this document, one or more antennas may be a plurality of physical antennas or a plurality of logical antennas (eg, antenna ports). The one or

more transceivers

106, 206 convert the received radio signal/channel, etc. from the RF band signal to process the received user data, control information, radio signal/channel, etc. using the one or

more processors

102, 202. It can be converted into a baseband signal. One or

more transceivers

106 , 206 may convert user data, control information, radio signals/channels, etc. processed using one or

more processors

102 , 202 from baseband signals to RF band signals. To this end, one or

more transceivers

106 , 206 may include (analog) oscillators and/or filters.

21 illustrates a vehicle or an autonomous driving vehicle to which the present invention is applied. The vehicle or autonomous driving vehicle may be implemented as a mobile robot, a vehicle, a train, an aerial vehicle (AV), a ship, and the like.

Referring to FIG. 21 , the vehicle or autonomous driving vehicle 100 includes an antenna unit 108 , a communication unit 110 , a control unit 120 , a driving unit 140a , a power supply unit 140b , a sensor unit 140c and autonomous driving. It may include a part 140d. The antenna unit 108 may be configured as a part of the communication unit 110 .

The communication unit 110 may transmit/receive signals (eg, data, control signals, etc.) to and from external devices such as other vehicles, base stations (e.g., base stations, roadside units, etc.), servers, and the like. The controller 120 may control elements of the vehicle or the autonomous driving vehicle 100 to perform various operations. The controller 120 may include an Electronic Control Unit (ECU). The driving unit 140a may cause the vehicle or the autonomous driving vehicle 100 to run on the ground. The driving unit 140a may include an engine, a motor, a power train, a wheel, a brake, a steering device, and the like. The power supply unit 140b supplies power to the vehicle or the autonomous driving vehicle 100 , and may include a wired/wireless charging circuit, a battery, and the like. The sensor unit 140c may obtain vehicle status, surrounding environment information, user information, and the like. The sensor unit 140c includes an inertial measurement unit (IMU) sensor, a collision sensor, a wheel sensor, a speed sensor, an inclination sensor, a weight sensor, a heading sensor, a position module, and a vehicle forward movement. / may include a reverse sensor, a battery sensor, a fuel sensor, a tire sensor, a steering sensor, a temperature sensor, a humidity sensor, an ultrasonic sensor, an illuminance sensor, a pedal position sensor, and the like. The autonomous driving unit 140d includes a technology for maintaining a driving lane, a technology for automatically adjusting speed such as adaptive cruise control, a technology for automatically driving along a predetermined route, and a technology for automatically setting a route when a destination is set. technology can be implemented.

For example, the communication unit 110 may receive map data, traffic information data, and the like from an external server. The autonomous driving unit 140d may generate an autonomous driving route and a driving plan based on the acquired data. The controller 120 may control the driving unit 140a to move the vehicle or the autonomous driving vehicle 100 along the autonomous driving path (eg, speed/direction adjustment) according to the driving plan. During autonomous driving, the communication unit 110 may obtain the latest traffic information data from an external server non/periodically, and may acquire surrounding traffic information data from surrounding vehicles. Also, during autonomous driving, the sensor unit 140c may acquire vehicle state and surrounding environment information. The autonomous driving unit 140d may update the autonomous driving route and driving plan based on the newly acquired data/information. The communication unit 110 may transmit information about a vehicle location, an autonomous driving route, a driving plan, and the like to an external server. The external server may predict traffic information data in advance using AI technology or the like based on information collected from the vehicle or autonomous vehicles, and may provide the predicted traffic information data to the vehicle or autonomous vehicles.

The embodiments described above are those in which elements and features of the present invention are combined in a predetermined form. Each component or feature should be considered optional unless explicitly stated otherwise. Each component or feature may be implemented in a form that is not combined with other components or features. It is also possible to configure embodiments of the present invention by combining some elements and/or features. The order of operations described in the embodiments of the present invention may be changed. Some features or features of one embodiment may be included in another embodiment, or may be replaced with corresponding features or features of another embodiment. It is apparent that claims that are not explicitly cited in the claims can be combined to form an embodiment or included as a new claim by amendment after filing.

A specific operation described in this document to be performed by a base station may be performed by an upper node thereof in some cases. That is, it is obvious that various operations performed for communication with the terminal in a network including a plurality of network nodes including the base station may be performed by the base station or other network nodes other than the base station. The base station may be replaced by terms such as a fixed station, gNode B (gNB), Node B, eNode B (eNB), and an access point.

It is apparent to those skilled in the art that the present invention may be embodied in other specific forms without departing from the characteristics of the present invention. Accordingly, the above detailed description should not be construed as restrictive in all respects but as exemplary. The scope of the present invention should be determined by a reasonable interpretation of the appended claims, and all modifications within the equivalent scope of the present invention are included in the scope of the present invention.

Although the method and apparatus for performing the above-described channel access procedure have been described focusing on examples applied to the 5th generation NewRAT system, it is possible to apply to various wireless communication systems in addition to the 5th generation NewRAT system.

Claims

A method for a terminal to transmit an uplink signal in a wireless communication system, the method comprising:

Obtaining second channel connection parameter entries for a second DCI format based on first channel connection parameter entries for a first Downlink Control Information (DCI) format,

Receive a DCI including information about any one of the second channel connection parameter entries among the second channel connection parameter entries;

Based on the one of the second channel access parameter entry, performing a channel access procedure (Channel Access Procedure; CAP),

It is characterized in that the uplink signal is transmitted based on the CAP result,

The DCI is the second DCI format,

Uplink signal transmission method.
The method of claim 1,

Each of the first channel access parameter entries and the second channel access parameter entries includes a first value for CAT (Channel Access Type), a second value for CPE (Cyclic Prefix Extension), and a Channel Access Priority Class (CAPC) ) containing a third value for

Uplink signal transmission method.
The method of claim 1,

Further comprising receiving the first channel connection parameter entries through a higher layer,

Uplink signal transmission method.
The method of claim 1,

The second channel connection parameter entries are obtained based on the number of bits for the second channel connection parameter included in the second DCI format,

Uplink signal transmission method.
The method of claim 1,

The priority for the first channel access parameter entries is the same as the priority for the second channel access parameter entries,

Uplink signal transmission method.
The method of claim 1,

Based on that the number of bits for the second channel access parameter included in the second DCI format is 0, the one second channel access parameter entry is preset,

Uplink signal transmission method.
A terminal for transmitting an uplink signal in a wireless communication system, the terminal comprising:

at least one transceiver;

at least one processor; and

at least one memory operatively coupled to the at least one processor and storing instructions that, when executed, cause the at least one processor to perform an operation;

The action is:

Obtaining second channel access parameter entries for a second DCI format based on first channel access parameter entries for a first Downlink Control Information (DCI) format,

Receive, through the at least one transceiver, DCI, including information about any one of the second channel connection parameter entries, about a second channel connection parameter entry;

Based on the one of the second channel access parameter entry, performing a channel access procedure (Channel Access Procedure; CAP),

Through the at least one transceiver, characterized in that the uplink signal is transmitted based on the CAP result,

The DCI is the second DCI format,

terminal.
8. The method of claim 7,

Each of the first channel access parameter entries and the second channel access parameter entries includes a first value for CAT (Channel Access Type), a second value for CPE (Cyclic Prefix Extension), and a Channel Access Priority Class (CAPC) ) containing a third value for

terminal.
8. The method of claim 7,

Further comprising receiving the first channel connection parameter entries through a higher layer,

terminal.
8. The method of claim 7,

The second channel connection parameter entries are obtained based on the number of bits for the second channel connection parameter included in the second DCI format,

terminal.
8. The method of claim 7,

The priority for the first channel access parameter entries is the same as the priority for the second channel access parameter entries,

terminal.
8. The method of claim 7,

Based on that the number of bits for the second channel access parameter included in the second DCI format is 0, the one second channel access parameter entry is preset,

terminal.
An apparatus for transmitting an uplink signal in a wireless communication system, the apparatus comprising:

at least one processor; and

at least one memory operatively coupled to the at least one processor and storing instructions that, when executed, cause the at least one processor to perform an operation;

The action is:

Obtaining second channel access parameter entries for a second DCI format based on first channel access parameter entries for a first Downlink Control Information (DCI) format,

Receive a DCI including information about any one of the second channel connection parameter entries among the second channel connection parameter entries;

Based on the one of the second channel access parameter entry, performing a channel access procedure (Channel Access Procedure; CAP),

It characterized in that the uplink signal is transmitted based on the CAP result,

The DCI is the second DCI format,

Device.
A computer-readable storage medium comprising at least one computer program for causing at least one processor to perform an operation, the operation comprising:

Obtaining second channel access parameter entries for a second DCI format based on first channel access parameter entries for a first Downlink Control Information (DCI) format,

Receive a DCI including information about any one of the second channel connection parameter entries among the second channel connection parameter entries;

Based on the one of the second channel access parameter entry, performing a channel access procedure (Channel Access Procedure; CAP),

It characterized in that the uplink signal is transmitted based on the CAP result,

The DCI is the second DCI format,

A computer-readable storage medium.