Method for transmitting and receiving uplink channel in wireless communication system and apparatus therefor

Abstract

A method of a terminal transmitting a physical uplink shared channel (PUSCH) in a wireless communication system is disclosed. Specifically, the disclosed method is characterized by comprising the steps of: receiving an uplink (UL) grant for scheduling a dynamic grant (DG)-PUSCH; transmitting a configured grant (CG)-PUSCH; and transmitting the DG-PUSCH based on the UL grant, wherein the DG-PUSCH is transmitted without a gap after the transmission of the CG-PUSCH based on a first frequency resource for the DG-PUSCH being the same as or a subset of a second frequency resource for the CG-PUSCH.

Description

Technical Field

[0001] The present disclosure relates to a method and apparatus for transmitting and receiving uplink channels in a wireless communication system. More specifically, the present disclosure relates to a method and apparatus for transmitting and receiving configured grant (CG)-physical uplink shared channel (PUSCH) and dynamic grant (DG)-PUSCH. Background Art

[0002] Wireless access systems have been widely deployed to provide various types of communication services, such as voice and data. Typically, a wireless access system is a multiple-access system that supports communication among multiple users by sharing available system resources (bandwidth, transmission power, etc.). For example, multiple-access systems include code division multiple access (CDMA), frequency division multiple access (FDMA), time division multiple access (TDMA), orthogonal frequency division multiple access (OFDMA), and single-carrier frequency division multiple access (SC-FDMA). Summary of the Invention

[0003] Technical issues

[0004] The present disclosure is intended to provide a method and apparatus for transmitting and receiving an uplink channel in a wireless communication system.

[0005] Those skilled in the art will understand that the objectives that can be achieved by the present disclosure are not limited to the contents specifically described above, and the above and other objectives that can be achieved by the present disclosure can be clearly understood from the following detailed description.

[0006] Technical Solution

[0007] According to one aspect of the present disclosure, a method for transmitting a physical uplink shared channel (PUSCH) by a user equipment (UE) in a wireless communication system is provided herein, comprising: receiving an uplink grant for scheduling a dynamic grant (DG)-PUSCH, transmitting a configured grant (CG)-PUSCH, and transmitting the DG-PUSCH based on the UL grant. Based on the fact that a first frequency resource used for the DG-PUSCH is equal to a second frequency resource used for the CG-PUSCH or the first frequency resource is a subset of the second frequency resource, the DG-PUSCH can be transmitted without a gap after transmitting the CG-PUSCH.

[0008] Transmitting the CG-PUSCH may include performing a listen-before-talk (LBT) operation for transmitting the CG-PUSCH and transmitting the CG-PUSCH based on a result of performing the LBT operation. Transmitting the DG-PUSCH may include transmitting the DG-PUSCH without performing the LBT operation.

[0009] The start symbol of DG-PUSCH and the end symbol of CG-PUSCH may be continuous on the time axis.

[0010] Based on the fact that the first frequency resource is not equal to the second frequency resource and the first frequency resource is not a subset of the second frequency resource, at least one last symbol among the symbols of the CG-PUSCH preceding the DG-PUSCH may be dropped.

[0011] The transmission of DG-PUSCH may be scheduled after the transmission of CG-PUSCH.

[0012] In another aspect of the present disclosure, an apparatus for transmitting a physical uplink shared channel (PUSCH) in a wireless communication system is provided herein, comprising: at least one processor; and at least one memory operably connected to the at least one processor and configured to store instructions that, when executed, cause the at least one processor to perform operations. The operations may include receiving an uplink grant for scheduling a dynamic grant (DG)-PUSCH, transmitting a configured grant (CG)-PUSCH, and transmitting the DG-PUSCH based on the UL grant. Based on the fact that the first frequency resource used for the DG-PUSCH is equal to the second frequency resource used for the CG-PUSCH or the first frequency resource is a subset of the second frequency resource, the DG-PUSCH may be transmitted without gaps after transmitting the CG-PUSCH.

[0013] Transmitting the CG-PUSCH may include performing a listen-before-talk (LBT) operation for transmitting the CG-PUSCH, and transmitting the CG-PUSCH based on a result of performing the LBT operation. Transmitting the DG-PUSCH may include transmitting the DG-PUSCH without performing the LBT operation.

[0014] The start symbol of DG-PUSCH and the end symbol of CG-PUSCH may be continuous on the time axis.

[0015] Based on the fact that the first frequency resource is not equal to the second frequency resource and the first frequency resource is not a subset of the second frequency resource, at least one last symbol among the symbols of the CG-PUSCH preceding the DG-PUSCH may be dropped.

[0016] The transmission of DG-PUSCH may be scheduled after the transmission of CG-PUSCH.

[0017] In another aspect of the present disclosure, a computer-readable storage medium is provided herein, comprising at least one computer program that causes at least one processor to perform operations. The operations may include receiving an uplink grant for scheduling a dynamic grant (DG)-PUSCH, sending a configured grant (CG)-PUSCH, and sending the DG-PUSCH based on the UL grant. Based on the first frequency resource used for the DG-PUSCH being equal to the second frequency resource used for the CG-PUSCH or the first frequency resource being a subset of the second frequency resource, the DG-PUSCH may be sent without a gap after sending the CG-PUSCH.

[0018] In another aspect of the present disclosure, a user equipment (UE) for transmitting a physical uplink shared channel (PUSCH) in a wireless communication system is provided herein, comprising: at least one transceiver; at least one processor; and at least one memory operably connected to the at least one processor and configured to store instructions that, when executed, cause the at least one processor to perform operations. The operations may include: receiving an uplink grant for scheduling a dynamic grant (DG)-PUSCH through at least one transceiver, transmitting a configured grant (CG)-PUSCH through at least one transceiver, and transmitting the DG-PUSCH based on the UL grant through at least one transceiver. Based on the fact that the first frequency resource used for the DG-PUSCH is equal to the second frequency resource used for the CG-PUSCH or the first frequency resource is a subset of the second frequency resource, the DG-PUSCH may be transmitted without gaps after transmitting the CG-PUSCH.

[0019] In another aspect of the present disclosure, a method for receiving a physical uplink shared channel (PUSCH) by a base station (BS) in a wireless communication system is provided herein, comprising: sending an uplink grant for scheduling a dynamic grant (DG)-PUSCH, receiving a configured grant (CG)-PUSCH, and receiving the DG-PUSCH based on the UL grant. Based on the fact that a first frequency resource for the DG-PUSCH is equal to a second frequency resource for the CG-PUSCH or the first frequency resource is a subset of the second frequency resource, the DG-PUSCH frequency resource can be received without gaps after sending the CG-PUSCH.

[0020] In another aspect of the present disclosure, a base station (BS) for receiving a physical uplink shared channel (PUSCH) in a wireless communication system is provided herein, comprising: at least one transceiver; at least one processor; and at least one memory operably connected to the at least one processor and configured to store instructions that, when executed, cause the at least one processor to perform operations. The operations may include: sending an uplink grant for scheduling a dynamic grant (DG)-PUSCH through at least one transceiver, receiving a configured grant (CG)-PUSCH through at least one transceiver, and receiving the DG-PUSCH based on the UL grant through at least one transceiver. Based on the first frequency resource used for the DG-PUSCH being equal to the second frequency resource used for the CG-PUSCH, or the first frequency resource being a subset of the second frequency resource, the DG-PUSCH frequency resource can be received without gaps after sending the CG-PUSCH.

[0021] Beneficial effects

[0022] According to the present disclosure, when a dynamic grant (DG)-physical uplink shared channel (PUSCH) is scheduled while a configured grant (CG)-PUSCH (physical uplink shared channel) is sent, CG-PUSCH and DG-PUSCH can be sent and received by effectively performing listen-before-talk (LBT).

[0023] Those skilled in the art will recognize that the effects that can be achieved using the present disclosure are not limited to the contents specifically described above, and other advantages of the present disclosure will be more clearly understood from the following detailed description in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 illustrates physical channels in a 3rd Generation Partnership Project (3GPP) system as an exemplary wireless communication system and a general signal transmission method using the same;

[0025] Figure 2 Figure 1 shows the radio frame structure;

[0026] Figure 3 illustrating a resource grid during the duration of a time slot;

[0027] Figure 4 illustrates an exemplary mapping of physical channels in time slots;

[0028] Figure 5 illustrates an exemplary uplink (UL) transmission operation of a user equipment (UE);

[0029] Figure 6 illustrates an exemplary repeated transmission of a grant based on configuration;

[0030] Figure 7 A wireless communication system is illustrated that supports a license-exempt band;

[0031] Figure 8 An exemplary method of occupying resources in a license-exempt band is illustrated;

[0032] Figure 9 An exemplary channel access procedure for a UE for UL signal transmission and / or DL signal transmission in a license-exempt band applicable to the present disclosure is illustrated;

[0033] Figures 10 to 15 is a diagram illustrating a UL channel transmission and reception method according to an embodiment of the present disclosure;

[0034] Figure 16 An exemplary communication system to which the present disclosure is applied is illustrated;

[0035] Figure 17 An exemplary wireless device applicable to the present disclosure is illustrated;

[0036] Figure 18 Another exemplary wireless device applicable to the present disclosure is illustrated; and

[0037] Figure 19 An exemplary vehicle or self-driving vehicle applicable to the present disclosure is illustrated. DETAILED DESCRIPTION

[0038] The following techniques can be used in various wireless access systems such as 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. The CDMA can be implemented as a radio technology such as universal terrestrial radio access (UTRA) or CDMA2000. The TDMA can be implemented as a radio technology such as global system for mobile communications (GSM) / general packet radio service (GPRS) / enhanced data rates for GSM evolution (EDGE). The OFDMA can be implemented as a radio technology such as institute of electrical and electronics engineers (IEEE) 802.11 (wireless fidelity (Wi-Fi)), IEEE 802.16 (worldwide interoperability for microwave access (WiMAX)), IEEE 802.20, evolved UTRA (E-UTRA) etc. The UTRA is a part of a universal mobile telecommunication system (UMTS). A 3rd generation partnership project (3GPP) long term evolution (LTE) is a part of an evolved-UMTS (E-UMTS) using the E-UTRA, and LTE-advanced (LTE-A) is an evolution of the 3GPP LTE. The 3GPP new radio or new radio access technology (NR) is an evolution of the 3GPP LTE / LTE-A.

[0039] As more and more communication devices require greater communication capacity, there has been a demand for enhanced mobile broadband communications relative to traditional radio access technologies (RATs). Large-scale machine type communications (MTC) that provide various services to multiple interconnected devices and things anytime and anywhere is one of the important issues to be solved by the next generation of communications. Discussions are also underway on the design of communication systems that take into account services that are sensitive to reliability and latency. In this way, the introduction of next-generation radio access technologies (RATs) for enhanced mobile broadband communications (eMBB), massive MTC (mMTC), and ultra-reliable low-latency communications (URLLC) is under discussion. For convenience, this technology is referred to as NR or new RAT in this disclosure.

[0040] Although the following description is given in the context of a 3GPP communication system (e.g., NR) for clarity, the technical spirit of the present disclosure is not limited to the 3GPP communication system. For the background technology, terms, and abbreviations used in this disclosure, please refer to the technical specifications published before this disclosure (e.g., 38.211, 38.212, 38.213, 38.214, 38.300, 38.331, etc.).

[0041] In wireless access systems, user equipment (UE) receives information from a base station (BS) on the downlink (DL) and transmits information to the BS on the uplink (UL). Information sent and received between the UE and BS includes general data and various types of control information. Depending on the type and purpose of the information sent and received between the BS and UE, various physical channels exist.

[0042] Figure 1 Illustration of physical channels in a 3GPP system and a general signal transmission method using the physical channels.

[0043] When the UE is powered on or enters a new cell, the UE performs an initial cell search (S11). The initial cell search involves acquiring synchronization with the BS. To this end, the UE receives a synchronization signal block (SSB) from the BS. The SSB includes a primary synchronization signal (PSS), a secondary synchronization signal (SSS), and a physical broadcast channel (PBCH). The UE synchronizes its timing with the BS and obtains information such as a cell identifier (ID) based on the PSS / SSS. In addition, the UE can obtain information broadcast in the cell by receiving the PBCH from the BS. During the initial cell search, the UE can also monitor the DL channel status by receiving a downlink reference signal (DL RS).

[0044] After the initial cell search, the UE may acquire more detailed system information by receiving a physical downlink control channel (PDCCH) and a physical downlink shared channel (PDSCH) corresponding to the PDCCH (S12).

[0045] Subsequently, in order to complete the connection to the BS, the UE may perform a random access procedure with the BS (S13 to S16). Specifically, the UE may transmit a preamble on a physical random access channel (PRACH) (S13), and may receive a PDCCH and a random access response (RAR) for the preamble on a PDSCH corresponding to the PDCCH (S14). The UE may then transmit a physical uplink shared channel (PUSCH) using the scheduling information in the RAR (S15), and perform a contention resolution procedure, including receiving a PDCCH and a PDSCH signal corresponding to the PDCCH (S16).

[0046] When the random access procedure is performed in two steps, steps S13 and S15 may be performed as one step (wherein message A is sent by the UE), and steps S14 and S16 may be performed as one step (wherein message B is sent by the BS).

[0047] After the above process, in the general UL / DL signal transmission process, the UE can receive PDCCH and / or PDSCH from the BS (S17), and send a physical uplink shared channel (PUSCH) and / or a physical uplink control channel (PUCCH) to the BS (S18). The control information sent by the UE to the BS is generally referred to as uplink control information (UCI). UCI includes hybrid automatic repeat and request acknowledgment / negative acknowledgment (HARQ-ACK / NACK), scheduling request (SR), channel state information (CSI), etc. CSI includes channel quality indicator (CQI), precoding matrix index (PMI), rank indication (RI), etc. Typically, UCI is sent on the PUCCH. However, if control information and data should be sent at the same time, the control information and data can be sent on the PUSCH. In addition, upon receiving a request / command from the network, the UE can send UCI on the PUSCH irregularly.

[0048] Figure 2 Figure 1 shows the radio frame structure.

[0049] In NR, UL and DL transmissions are configured in frames. Each radio frame has a length of 10ms and is divided into two 5ms half-frames. Each half-frame is divided into five 1ms subframes. A subframe is divided into one or more time slots, and the number of time slots in a subframe depends on the subcarrier spacing (SCS). Depending on the cyclic prefix (CP), each time slot includes 12 or 14 OFDM (A) symbols. When a normal CP is used, each time slot includes 14 OFDM symbols. When an extended CP is used, each time slot includes 12 OFDM symbols. Symbols can include OFDM symbols (or CP-OFDM symbols) and SC-FDMA symbols (or discrete Fourier transform-spread OFDM (DFT-s-OFDM) symbols).

[0050] Table 1 exemplarily illustrates that the number of symbols per slot, the number of slots per frame, and the number of slots per subframe vary according to the SCS in the normal CP case.

[0051] [Table 1]

[0052] SCS(15*2^u) <![CDATA[N slot symb ]]> N frame,u slot ]]> <![CDATA[N subframe,u slot ]]> 15KHz (u=0) 14 10 1 30KHz (u=1) 14 20 2 60KHz (u=2) 14 40 4 120KHz (u=3) 14 80 8 240KHz (u=4) 14 160 16

[0053] *N slot symb : The number of symbols in a time slot

[0054] *N frame,u slot : Number of time slots in a frame

[0055] *N subframe,u slot : Number of time slots in a subframe

[0056] Table 2 illustrates that the number of symbols per slot, the number of slots per frame, and the number of slots per subframe vary according to SCS in the case of extended CP.

[0057] [Table 2]

[0058] SCS(15*2^u) N slot symb ]]> <![CDATA[N frame,u slot ]]> <![CDATA[N subframe,u slot ]]> 60KHz (u=2) 12 40 4

[0059] The frame structure is only an example, and the number of subframes, the number of time slots, and the number of symbols in a frame can be changed in various ways. In the NR system, different OFDM(A) parameter sets (e.g., SCS, CP length, etc.) can be configured for multiple cells aggregated for one UE. Therefore, the (absolute time) duration (for convenience, referred to as a time unit (TU)) of a time resource (e.g., a subframe, time slot, or transmission time interval (TTI)) consisting of the same number of symbols can be configured differently between aggregated cells.

[0060] In NR, various parameter sets (or SCSs) can be supported to support various fifth-generation (5G) services. For example, with an SCS of 15kHz, wide areas in traditional cellular bands can be supported, while with an SCS of 30kHz or 60kHz, dense urban areas, lower latency, and wide carrier bandwidth can be supported. With an SCS of 60kHz or higher, bandwidths greater than 24.25kHz can be supported to overcome phase noise.

[0061] The NR band can be defined by two types of frequency ranges, FR1 and FR2. FR1 and FR2 can be configured as shown in Table 3 below. FR2 can be millimeter wave (mmW).

[0062] [Table 3]

[0063] Frequency range name Corresponding frequency range Subcarrier spacing FR1 450MHz-7125MHz 15, 30, 60kHz FR2 24250MHz-52600MHz 60, 120, 240kHz

[0064] Figure 3 The diagram shows a resource grid over the duration of a time slot. A time slot includes multiple symbols in the time domain. For example, a time slot includes 14 symbols in the normal CP case and 12 symbols in the extended CP case. A carrier includes multiple subcarriers in the frequency domain. A resource block (RB) can be defined by multiple (e.g., 12) consecutive subcarriers in the frequency domain. A bandwidth part (BWP) can be defined by multiple consecutive (physical) RBs ((P)RBs) in the frequency domain and corresponds to a parameter set (e.g., SCS, CP length, etc.). A carrier can include a maximum of N (e.g., 5) BWPs. Data communication can be carried out in active BWPs, and only one BWP can be activated for a UE. Each element in the resource grid can be referred to as a resource element (RE) to which a complex symbol can be mapped.

[0065] Figure 4 An exemplary mapping of physical channels in time slots is illustrated.

[0066] DL control channels, DL or UL data, and UL control channels can all be included in one time slot. For example, the first N symbols in a time slot (hereinafter referred to as the DL control region) can be used to send DL control channels, and the last M symbols in a time slot (hereinafter referred to as the UL control region) can be used to send UL control channels. N and M are integers equal to or greater than 0. The resource area (hereinafter referred to as the data area) between the DL control area and the UL control area can be used for DL ​​data transmission or UL data transmission. A time gap for DL ​​to UL or UL to DL switching can be defined between the control area and the data area. PDCCH can be sent in the DL control region, and PDSCH can be sent in the DL data region. Some symbols in a time slot when switching from DL to UL can be configured as time gaps.

[0067] Now, a detailed description will be given of the physical channels.

[0068] The PDSCH transmits DL data (e.g., downlink shared channel (DL-SCH) transport blocks (TBs)) and adopts modulation schemes such as quadrature phase shift keying (QPSK), 16-ary quadrature amplitude modulation (16QAM), 64-ary QAM (64QAM), or 256-ary QAM (256QAM). TBs are encoded as codewords. The PDSCH can transmit up to two codewords. The codewords are individually subjected to scrambling and modulation mapping, and the modulation symbols from each codeword are mapped to one or more layers. An OFDM signal is generated by mapping each layer to a resource together with the DMRS, and the OFDM signal is transmitted through the corresponding antenna port.

[0069] PDCCH delivers DCI. For example, PDCCH (i.e., DCI) can carry information about the transport format and resource allocation of the DL shared channel (DL-SCH), resource allocation information of the uplink shared channel (UL-SCH), paging information about the paging channel (PCH), system information about DL-SCH, information about resource allocation of higher-layer control messages such as RAR sent on PDSCH, transmit power control commands, information about activation / release of configured scheduling, etc. DCI includes a cyclic redundancy check (CRC). Depending on the owner or use of the PDCCH, the CRC is masked with various identifiers (IDs) (e.g., radio network temporary identifier (RNTI)). For example, if the PDCCH is for a specific UE, the CRC is masked by the UE ID (e.g., cell RNTI (C-RNTI)). If the PDCCH is used for a paging message, the CRC is masked by the paging RNTI (P-RNTI). If the PDCCH is used for system information (e.g., system information block (SIB)), the CRC is masked by the system information RNTI (SI-RNTI). When the PDCCH is used for RAR, the CRC is masked by a random access RNTI (RA-RNTI).

[0070] The PDCCH uses a fixed modulation scheme (e.g., QPSK). A PDCCH consists of 1, 2, 4, 8, or 16 control channel elements (CCEs) depending on its aggregation level (AL). A CCE consists of 6 resource element groups (REGs), each of which is defined by one OFDM symbol of a (P)RB.

[0071] The PDCCH is transmitted in a control resource set (CORESET). A CORESET corresponds to a set of physical resources / parameters used to deliver PDCCH / DCI in a BWP. For example, a CORESET is defined as a set of REGs with a given parameter set (e.g., SCS, CP length, etc.). A CORESET can be configured by system information (e.g., Master Information Block (MIB)) or UE-specific higher layer signaling (e.g., RRC signaling). For example, the following parameters / information can be used to configure a CORESET, and multiple CORESETs may overlap with each other in the time / frequency domain.

[0072] -controlResourceSetId: indicates the ID of the CORESET.

[0073] -frequencyDomainResources: Indicates the frequency domain resources of the CORESET. The frequency domain resources are indicated by a bitmap, and each bit of the bitmap corresponds to an RB group (i.e., six consecutive RBs). For example, the most significant bit (MSB) of the bitmap corresponds to the first RB group of the BWP. The RB group corresponding to the bit set to 1 is allocated as the frequency domain resource of the CORESET.

[0074] Duration: Indicates the time region resource of the CORESET. It indicates the number of consecutive OFDMA symbols in the CORESET. For example, the duration is set to one of 1 to 3.

[0075] -cce-REG-MappingType: Indicates the CCE to REG mapping type. Both interleaved and non-interleaved types are supported.

[0076] -precoderGranularity: Indicates the precoder granularity in the frequency domain.

[0077] -tci-StatesPDCCH: Provides information indicating the Transmission Configuration Indication (TCI) state for PDCCH (e.g., TCI-StateID). The TCI state is used to provide a quasi-co-location relationship between (one or more) DL RSs in an RS set (TCI state) and the PDCCH DMRS port.

[0078] -tci-PresentInDCI: Indicates whether the TCI field is included in the DCI.

[0079] -pdcch-DMRS-ScramblingID: Provides information for initializing the PDCCH DMRS scrambling sequence.

[0080] To receive the PDCCH, the UE may monitor (e.g., blindly decode) a set of PDCCH candidates in a CORESET. A PDCCH candidate is a CCE(s) that the UE monitors for PDCCH reception / detection. PDCCH monitoring may be performed in one or more CORESETs in the active DL BWP on each active cell configured with PDCCH monitoring. 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.

[0081] Table 4 lists exemplary PDCCH SSs.

[0082] [Table 4]

[0083]

[0084] The SS set can be configured by system information (e.g., MIB) or UE-specific higher layer (e.g., RRC) signaling. S or fewer SS sets can be configured in each DL BWP of the serving cell. For example, the following parameters / information can be provided for each SS set. Each SS set can be 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.

[0085] -controlResourceSetId: Indicates the CORESET associated with the SS set.

[0086] - monitoringSlotPeriodicityAndOffset: indicates the PDCCH monitoring periodicity (in time slots) and the PDCCH monitoring offset (in time slots).

[0087] -monitoringSymbolsWithinSlot: Indicates the first OFDMA symbol(s) used for PDCCH monitoring in a slot configured with PDCCH monitoring. The OFDMA symbols are indicated by a bitmap, and each bit of the bitmap corresponds to an OFDM symbol in the slot. The MSB of the bitmap corresponds to the first OFDM symbol of the slot. The OFDMA symbol(s) corresponding to the bit(s) set to 1 correspond to the first symbol(s) of the CORESET in that slot.

[0088] -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, and 8).

[0089] -searchSpaceType: Indicates whether the SS type is CSS or USS.

[0090] -DCI format: indicates the DCI format of the PDCCH candidate.

[0091] The UE can monitor PDCCH candidates in one or more SS sets in a time slot based on the CORESET / SS set configuration. The timing (e.g., time / frequency resources) at which PDCCH candidates should be monitored is defined as a PDCCH (monitoring) opportunity. One or more PDCCH (monitoring) opportunities can be configured in a time slot.

[0092] Table 5 illustrates an exemplary DCI format transmitted on the PDCCH.

[0093] [Table 5]

[0094] DCI format use 0_0 PUSCH scheduling in a cell 0_1 PUSCH scheduling in a cell 1_0 PDSCH scheduling in a cell 1_1 PDSCH scheduling in a cell 2_0 Notify UE group of timeslot format 2_1 Notify the UE group of PRBs and OFDM symbols where the UE can assume that the transmission is not intended for the UE 2_2 Transmission of TPC commands for PUCCH and PUSCH 2_3 Transmission of a set of TPC commands via SRS transmission of one or more UEs

[0095] DCI format 0_0 can be used to schedule TB-based (or TB-level) PUSCH, and DCI format 0_1 ​​can be used to schedule TB-based (or TB-level) PUSCH or code block group (CBG) (or CBG-level) PUSCH. DCI format 1_0 can be used to schedule TB-based (or TB-level) PDSCH, and DCI format 1_1 can be used to schedule TB-based (or TB-level) PDSCH or CBG (or CBG-level) PDSCH (DL grant DCI). DCI format 0_0 / 0_1 can be referred to as UL grant DCI or UL scheduling information, and DCI format 1_0 / 1_1 can be referred to as DL grant DCI or DL ​​scheduling information. DCI format 2_0 is used to deliver dynamic slot format information (e.g., dynamic slot format indicator (SFI)) to the UE, and DCI format 2_1 is used to deliver DL preemption information to the UE. DCI format 2_0 and / or DCI format 2_1 can be delivered to the corresponding UE group on the group common PDCCH, which is the PDCCH for the UE group. DCI format 0_0 and DCI format 1_0 can be referred to as fallback DCI formats, while DCI format 0_1 ​​and DCI format 1_1 can be referred to as non-fallback DCI formats. In the fallback DCI format, the DCI size / field configuration remains the same regardless of the UE configuration. In contrast, the DCI size / field configuration varies depending on the UE configuration in the non-fallback DCI format.

[0096] PUCCH delivers uplink control information (UCI). UCI includes the following information.

[0097] -SR: Information used to request UL-SCH resources.

[0098] -HARQ-ACK: A response to a DL data packet (e.g., a codeword) on the PDSCH. HARQ-ACK indicates whether the DL data packet has been successfully received. In response to a single codeword, a 1-bit HARQ-ACK can be sent. In response to two codewords, a 2-bit HARQ-ACK can be sent. HARQ-ACK responses include positive ACK (abbreviated as ACK), negative ACK (NACK), discontinuous transmission (DTX), or NACK / DTX. The term HARQ-ACK can be used interchangeably with HARQ ACK / NACK and ACK / NACK.

[0099] -CSI: Feedback information for DL ​​channels. Feedback information related to Multiple Input Multiple Output (MIMO) includes RI and PMI.

[0100] Table 6 illustrates an exemplary PUCCH format. Based on PUCCH transmission duration, PUCCH formats can be divided into short PUCCH (formats 0 and 2) and long PUCCH (formats 1, 3, and 4).

[0101] [Table 6]

[0102]

[0103] PUCCH format 0 conveys up to 2 bits of UCI and is mapped in a sequence-based manner for transmission. Specifically, the UE sends specific UCI to the BS by sending one of multiple sequences on the PUCCH in PUCCH format 0. Only when the UE sends a positive SR, the UE sends the PUCCH in PUCCH format 0 in the PUCCH resources used for the corresponding SR configuration.

[0104] PUCCH format 1 conveys up to 2 bits of UCI in the time domain, and the modulation symbols of the UCI are spread in the time domain with an orthogonal cover code (OCC), which is configured differently depending on whether frequency hopping is performed. DMRS is transmitted in symbols where no modulation symbols are transmitted (i.e., transmitted using time division multiplexing (TDM)).

[0105] PUCCH format 2 conveys more than two bits of UCI, and the modulation symbols of the DCI are frequency-division multiplexed (FDM) with the DMRS. The DMRS is located in symbols #1, #4, #7, and #10 of a given RB at a density of 1 / 3. A pseudo-noise (PN) sequence is used for the DMRS sequence. Frequency hopping can be activated for the two-symbol PUCCH format 2.

[0106] PUCCH format 3 does not support UE multiplexing in the same PRBS and conveys more than 2 bits of UCI. In other words, the PUCCH resources of PUCCH format 3 do not include OCC. Modulation symbols and DMRS are sent in time-division multiplexing (TDM).

[0107] PUCCH format 4 supports multiplexing of up to four UEs in the same PRBS and conveys more than two bits of UCI. In other words, the PUCCH resources of PUCCH format 3 include OCC. Modulation symbols and DMRS are transmitted using time-division multiplexing (TDM).

[0108] The PUSCH delivers UL data (e.g., UL shared channel transport block (UL-SCH TB)) and / or UCI based on a CP-OFDM waveform or a DFT-s-OFDM waveform. When the PUSCH is transmitted with a DFT-s-OFDM waveform, the UE transmits the PUSCH with transform precoding. For example, when transform precoding is not possible (e.g., disabled), the UE may transmit the PUSCH with a CP-OFDM waveform, and when transform precoding is possible (e.g., enabled), the UE may transmit the PUSCH with a CP-OFDM waveform or a DFT-s-OFDM waveform. PUSCH transmission may be dynamically scheduled by a UL grant in the DCI, or semi-statically scheduled (configured scheduling or configured grant) by higher layer (e.g., RRC) signaling (and / or Layer 1 (L1) signaling such as PDCCH). PUSCH transmission may be performed in a codebook-based or non-codebook-based manner.

[0109] On the DL, the BS can dynamically allocate resources for DL ​​transmission to the UE through (one or more) PDCCHs (including DCI format 1_0 or DCI format 1_1). In addition, the BS can indicate to a specific UE through (one or more) PDCCHs (including DCI format 2_1) that some resources pre-scheduled for the UE have been preempted for signal transmission to another UE. In addition, the BS can configure the DL assignment period through higher layer signaling in a semi-persistent scheduling (SPS) scheme, and signal the activation / deactivation of the DL assignment configured by the PDCCH to provide the UE with a DL assignment for initial HARQ transmission. When retransmission for the initial HARQ transmission is required, the BS explicitly schedules the retransmission resources through the PDCCH. When a DCI-based DL assignment conflicts with an SPS-based DL assignment, the UE can give priority to the DCI-based DL assignment.

[0110] Similar to DL, for UL, the BS can dynamically allocate resources for UL transmission to the UE through (one or more) PDCCHs (including DCI format 0_0 or DCI format 0_1). In addition, the BS can allocate UL resources for initial HARQ transmission to the UE based on the configured grant (CG) method (similar to SPS). Although dynamic scheduling involves PDCCH for PUSCH transmission, the configured grant does not involve PDCCH for PUSCH transmission. However, the UL resources for retransmission are explicitly allocated by (one or more) PDCCHs. In this way, the operation of the BS pre-configuring UL resources without dynamic grant (DG) (for example, by scheduling UL grant of DCI) is called "CG". Two types of CG are defined.

[0111] - Type 1: UL grants with a predetermined period are provided by higher layer signaling (without L1 signaling).

[0112] -Type 2: The period of UL grant is configured by higher layer signaling, and activation / deactivation of CG is signaled by PDCCH to provide UL grant.

[0113] Figure 5 FIGURE 1 illustrates an exemplary UL transmission operation of a UE. The UE may be based on DG( Figure 5 (a)) or based on CG( Figure 5 (b)) to send the expected packet.

[0114] Resources for CG can be shared among multiple UEs. UL signal transmission based on the CG from each UE can be identified by time / frequency resources and RS parameters (e.g., different cyclic shifts, etc.). Therefore, when a UE fails to transmit an UL signal due to a signal collision, the BS can identify the UE and explicitly send a retransmission grant for the corresponding TB to the UE.

[0115] The CG supports K repetitions of the same TB, including an initial transmission. Based on the resources used for the initial transmission, the same HARQ process ID is determined for the K repetitions of the UL signal. The redundancy version (RV) of the K repetitions of the TB has one of the patterns {0, 2, 3, 1}, {0, 3, 0, 3}, and {0, 0, 0, 0}.

[0116] Figure 6 An exemplary CG-based repeated transmission is illustrated.

[0117] The UE performs repeated transmissions until one of the following conditions is met:

[0118] - Successfully received UL grant for the same TB;

[0119] -TB is repeated up to K times; and

[0120] - (In option 2) the end time of period P is reached.

[0121] Similar to License Assisted Access (LAA) in conventional 3GPP LTE systems, the use of unlicensed bands for cellular communications in 3GPP NR systems is also being considered. Unlike LAA, standalone (SA) operation is targeted in NR cells in unlicensed bands (hereinafter referred to as NR unlicensed cells (Ucells)). For example, PUCCH, PUSCH, and PRACH transmissions can be supported in NR Ucells.

[0122] In an NR system to which various embodiments of the present disclosure are applicable, each component carrier (CC) may be allocated / supported up to 400 MHz. When a UE operating in such a wideband CC always turns on the radio frequency (RF) module in the entire CC, the battery consumption of the UE may increase.

[0123] Alternatively, considering various use cases (e.g., eMBB, URLLC, mMTC, etc.) operating within a single wideband CC, different parameter sets (e.g., SCS) can be supported for each frequency band within the CC.

[0124] Alternatively, each UE may have a different maximum bandwidth capability.

[0125] In this regard, the BS may indicate to the UE to operate only in a portion of the bandwidth of the wideband CC instead of the full bandwidth. The portion of the bandwidth may be defined as a bandwidth part (BWP).

[0126] A BWP may be a subset of consecutive RBs on the frequency axis. One BWP may correspond to one parameter set (eg, SCS, CP length, slot / mini-slot duration, etc.).

[0127] The BS can configure multiple BWPs in a CC configured for a UE. For example, the BS can configure a BWP occupying a relatively small frequency region in the PDCCH monitoring time slot and schedule the PDSCH indicated (or scheduled) by the PDCCH in a larger BWP. Alternatively, when UEs are concentrated on a specific BWP, the BS can configure another BWP for some UEs for load balancing. Alternatively, considering frequency-domain inter-cell interference cancellation between adjacent cells, the BS can exclude some spectrum from the total bandwidth and configure BWPs on both sides of the cell in the same time slot.

[0128] The BS may configure at least one DL / UL BWP for a UE associated with a wideband CC, activate at least one of the configured DL / UL BWP(s) at a specific point in time (via L1 signaling (e.g., DCI), MAC signaling, or RRC signaling), and instruct switching to another configured DL / UL BWP (via L1 signaling, MAC signaling, or RRC signaling). Furthermore, upon expiration of a timer value (e.g., a BWP inactivity timer value), the UE may switch to the predetermined DL / UL BWP. The activated DL / UL BWP may be referred to as an active DL / UL BWP. During initial access or before RRC connection establishment, the UE may not receive a configuration for a DL / UL BWP from the BS. The DL / UL BWP assumed by the UE in this case is defined as the initial active DL / UL BWP.

[0129] Figure 7 An exemplary wireless communication system supporting a license-free band suitable for use with the present disclosure is illustrated.

[0130] In the following description, a cell operating in a licensed band (L band) is defined as an L cell, and a carrier of the L cell is defined as a (DL / UL) LCC. A cell operating in an unlicensed band (U band) is defined as a U cell, and a carrier of the U cell is defined as a (DL / UL) UCC. A carrier / carrier frequency of a cell may refer to an operating frequency (e.g., center frequency) of the cell. A cell / carrier (e.g., CC) is generally referred to as a cell.

[0131] When the BS and UE send and receive signals on the LCC and UCC of carrier aggregation, such as Figure 7 As shown in (a), LCC and UCC can be configured as primary CC (PCC) and secondary CC (SCC) respectively. BS and UE can send and receive signals on one UCC or on multiple carrier aggregated UCCs, as shown in Figure 7 (b) In other words, the BS and UE can send and receive signals only on (one or more) UCCs without using any LCCs. For SA operation, PRACH, PUCCH, PUSCH, and SRS transmission can be supported on the UCell.

[0132] Signal transmission and reception operations in the license-free band as described in this disclosure may be applied to the above-mentioned deployment scenarios (unless otherwise specified).

[0133] Unless otherwise stated, the following definitions apply to the following terms used in this disclosure.

[0134] - Channel: A carrier or a portion of a carrier consisting of a set of consecutive RBs, where a channel access procedure (CAP) is performed in the shared spectrum.

[0135] Channel Access Procedure (CAP): A procedure for evaluating channel availability based on sensing before signal transmission to determine whether (one or more) other communication nodes are using the channel. The basic sensing unit is a sensing slot of duration Tsl = 9 μs. The BS or UE senses the slot during the sensing slot duration. When the power detected for at least 4 μs within the sensing slot duration is less than the energy detection threshold Xthresh, the sensing slot duration Tsl is considered idle. Otherwise, the sensing slot duration Tsl is considered busy. CAP can also be referred to as Listen Before Talk (LBT).

[0136] - Channel occupancy: transmission(s) from BS / UE on the channel after CAP.

[0137] - Channel Occupancy Time (COT): The total time that a BS / UE and any BS / UE(s) sharing the channel occupancy perform(s) transmission(s) on the channel after the CAP. Regarding COT determination, if a transmission gap is less than or equal to 25 us, the gap duration may be counted in the COT. The COT may be shared for transmissions between a BS and corresponding UE.

[0138] -DL transmission burst: A collection of transmissions from a BS without any gaps greater than 16 μs. Transmissions from a BS separated by gaps greater than 16 μs are considered separate DL transmission bursts. The BS may perform (one or more) transmissions after a gap without sensing channel availability within a DL transmission burst.

[0139] -UL transmission burst: A set of transmissions from a UE without any gaps greater than 16 μs. Transmissions from a UE separated by gaps greater than 16 μs are considered separate UL transmission bursts. The UE may perform (one or more) transmissions after a gap without sensing channel availability within a DL transmission burst.

[0140] -Discovery burst: A DL transmission burst including a set of (one or more) signals and / or (one or more) channels that are confined to a window and associated with a duty cycle. The discovery burst may include (one or more) transmissions initiated by the BS, including PSS, SSS, and cell-specific RS (CRS), and further including non-zero power CSI-RS. In an NR system, the discovery burst may include (one or more) transmissions initiated by the BS, which include at least SS / PBCH blocks, and further include a CORESET of a PDCCH for scheduling a PDSCH carrying SIB1, a PDSCH carrying SIB1, and / or non-zero power CSI-RS.

[0141] Figure 8 An exemplary method of occupying resources in a license-exempt band is illustrated.

[0142] refer to Figure 8 , a communication node (e.g., BS or UE) operating in an unlicensed band should determine whether (one or more) other communication nodes are using a channel before signal transmission. For this purpose, the communication node may perform CAP to access (one or more) channels on which (one or more) transmissions are to be performed in the unlicensed band. CAP may be performed based on sensing. For example, a communication node may determine whether (one or more) other communication nodes are transmitting signals on (one or more) channels by carrier sensing (CS) before signal transmission. Determining that (one or more) other communication nodes are not transmitting signals is defined as confirming a clear channel assessment (CCA). In the presence of a CCA threshold (e.g., X) that has been predefined or configured by higher layer (e.g., RRC) signaling, the communication node may determine whether (one or more) other communication nodes are transmitting signals on (one or more) channels. thresh ), when energy above the CCA threshold is detected in the channel, the communication node may determine that the channel is busy. Otherwise, the communication node may determine that the channel is idle. When the channel is determined to be idle, the communication node may begin transmitting signals in the unlicensed band. CAP can be replaced by LBT.

[0143] Table 7 describes exemplary CAPs supported in NR-U.

[0144] [Table 7]

[0145]

[0146] In a wireless communication system supporting an unlicensed band, a cell (or carrier (e.g., CC)) or BWP configured for a UE may be a broadband with a larger bandwidth (BW) than conventional LTE. However, the BW of a CCA requiring independent LBT operation may be limited according to regulations. A subband (SB) in which LBT is performed separately is defined as an LBT-SB. Multiple LBT-SBs may then be included in one broadband cell / BWP. The RB set included in the LBT-SB may be configured through higher layer (e.g., RRC) signaling. Therefore, based on (i) the BW of the cell / BWP and (ii) the RB set allocation information, one or more LBT-SBs may be included in one cell / BWP. Multiple LBT-SBs may be included in the BWP of a cell (or carrier). The LBT-SB may be, for example, a 20 MHz band. The LBT-SB may include multiple consecutive (P)RBs in the frequency domain and may therefore be referred to as a (P)RB set.

[0147] In Europe, two LBT operations are defined: frame-based equipment (FBE) and load-based equipment (LBE). In FBE, a fixed frame consists of a channel occupation time (e.g., 1 to 10 ms) and an idle period corresponding to at least 5% of the occupied channel occupation time. The channel occupation time is the time period during which the communication node can continue to transmit during a successful channel access, and CCA is defined as an operation that observes the channel during a CCA slot (at least 20 μs) at the end of the idle period. The communication node performs CCA periodically based on the fixed frame. When the channel is not occupied, the communication node transmits during the channel occupation time, and when the channel is occupied, the communication node postpones transmission and waits until the CCA slot in the next period.

[0148] In LBE, the communication node can set q∈{4, 5, ..., 32} and then perform CCA within one CCA slot. When the channel is not occupied in the first CCA slot, the communication node can ensure a time period of up to (13 / 32)q ms and send data during this time period. When the channel is occupied in the first CCA slot, the communication node randomly selects N∈{1, 2, ..., q}, stores the selected value as the initial value, and then senses the channel state based on the CCA slot. Each time the channel is not occupied in the CCA slot, the communication node decrements the stored counter value by 1. When the counter value reaches 0, the communication node can ensure a time period of up to (13 / 32)q ms and send data.

[0149] The eNB or UE of the LTE / NR system should also perform LBT for signal transmission in the unlicensed band (for convenience, referred to as the U band). In addition, when the eNB or UE of the LTE / NR system transmits a signal, other communication nodes such as Wi-Fi should also perform LBT so that the eNB or UE does not cause transmission interference. For example, in the Wi-Fi standard (801.11ac), the CCA threshold is defined as -62dBm for non-Wi-Fi signals and -82dBm for Wi-Fi signals. For example, when a station (STA) or access point (AP) receives a signal other than a Wi-Fi signal at a power of -62dBm or greater, the STA or AP does not transmit other signals to avoid causing interference.

[0150] The UE performs Type 1 or Type 2 CAP for UL signal transmission in the unlicensed band. Generally, the UE can perform the CAP (e.g., Type 1 or Type 2) configured by the BS for UL signal transmission. For example, CAP type indication information can be included in the UL grant (e.g., DCI format 0_0 or DCI format 0_1) that schedules PUSCH transmission.

[0151] In Type 1 UL CAP, the length of the time period spanned by the sensing slots that are sensed as idle before the transmission(s) is random. Type 1 UL CAP can apply to the following transmissions.

[0152] - PUSCH / SRS transmission(s) scheduled and / or configured by the BS

[0153] - PUCCH transmission(s) scheduled and / or configured by the BS

[0154] - Transmission(s) related to random access procedure (RAP)

[0155] Figure 9 Type 1 CAP in CAP for UL signal transmission in unlicensed band for UEs applicable to the present disclosure is illustrated.

[0156] First, reference will be made to Figure 9 UL signal transmission in unlicensed band is described.

[0157] The UE can sense whether the channel is idle for a sensing slot duration of T d after the counter N decrements to 0, the UE can perform the transmission (S934). The counter N is adjusted by sensing the channel for additional slot duration(s) according to the following procedure.

[0158] Step 1) Set N = Ninit, where Ninit is a random number uniformly distributed between 0 and CW P , and go to Step 4 (S920).

[0159] Step 2) If N > 0 and the UE chooses to decrement the counter, set N = N - 1 (S940).

[0160] Step 3) Sense the channel for additional slot duration and go to Step 4 if the additional slot duration is idle (Y). Otherwise (N), go to Step 5 (S950).

[0161] Step 4) If N = 0 (Y) (S930), stop the CAP (S932). Otherwise (N), go to Step 2.

[0162] Step 5) Sense the channel until a busy sensing slot is detected within an additional deferral duration Td or all slot durations of the additional deferral duration Td are sensed as idle (S960).

[0163] Step 6) If the channel is sensed as idle for all slot durations of the additional deferral duration Td (Y), go to Step 4. Otherwise (N), go to Step 5 (S970).

[0164] Table 8 illustrates mp, minimum CW, maximum CW, maximum channel occupancy time (MCOT), and allowed CW size variation applied to CAP according to channel access priority level.

[0165] [Table 8]

[0166]

[0167] The hold-off duration Td includes a duration Tf (16 μs) followed by mp consecutive time slot durations, where each time slot duration Tsl is 9 μs and Tf includes a sensing time slot duration T at the beginning of the 16-us duration. sl CWmin,p<=CWp<=CWmax,p. CWp is set to CWmin,p and may be updated based on an explicit / implicit reception response to a previous UL burst (e.g., PUSCH) before step 1 (CW size update). For example, CW p It may be initialized to CWmin,p based on the explicit / implicit reception response to the previous UL burst, may be increased to the next higher allowed value, or may be maintained at the existing value.

[0168] In a Type 2 UL CAP, the length of the time period spanned by the sensing timeslots sensed as idle before (one or more) transmissions is deterministic. Type 2 UL CAPs are classified into Type 2A UL CAP, Type 2B UL CAP, and Type 2C UL CAP. In a Type 2A UL CAP, the UE may send a signal immediately after the channel is sensed as idle during at least the sensing duration Tshort_dl (=25 μs). Tshort_dl includes the duration Tf (=16 μs) and an immediately following sensing timeslot duration. In a Type 2A UL CAP, Tf includes the sensing timeslot at the beginning of the duration. In a Type 2B UL CAP, the UE may send a signal immediately after the channel is sensed as idle during the sensing timeslot duration Tf (=16 μs). In a Type 2B UL CAP, Tf includes the sensing timeslots within the last 9 μs of the duration. In a Type 2C UL CAP, the UE does not sense the channel before transmission.

[0169] To allow a UE to transmit UL data in an unlicensed band, the BS must successfully transmit an UL grant in the unlicensed band during LBT operation, and the UE must also successfully transmit UL data during LBT operation. That is, the UE can attempt UL data transmission only when both the BS and the UE succeed in their LBT operations. Furthermore, because there is a delay of at least 4 milliseconds between an UL grant and scheduled UL data in LTE systems, earlier access from another transmitting node coexisting in the unlicensed band during this period may delay the UE's scheduled UL data transmission. In this context, methods for improving the efficiency of UL data transmission in unlicensed bands are being discussed.

[0170] In order to support UL transmission with relatively high reliability and relatively low time delay, NR also supports CG type 1 and CG type 2, in which the BS pre-configures time, frequency and coding resources for the UE through higher layer signaling (e.g., RRC signaling) or both higher layer signaling and L1 signaling (e.g., DCI). In the absence of a UL grant received from the BS, the UE can perform UL transmission in resources configured with type 1 or type 2. In type 1, the periodicity of the CG, the offset from SFN=0, time / frequency resource allocation, the number of repetitions, DMRS parameters, MCS / TB size (TBS), power control parameters, etc. are all configured only by higher layer signaling such as RRC signaling, without L1 signaling. Type 2 is a scheme in which the periodicity and power control parameters of the CG are configured by higher layer signaling such as RRC signaling, and information about the remaining resources (e.g., offset of the initial transmission timing, time / frequency resource allocation, DMRS parameters and MCS / TBS) is indicated by activating DCI as L1 signaling.

[0171] Now, refer to Figure 9 Describes DL signal transmission in the U-band.

[0172] The BS may perform one of the following CAPs for DL ​​signal transmission in the U-band.

[0173] (1) Type 1 DL CAP method

[0174] In a Type 1 DL CAP, the length of the duration spanned by a sensing slot that is sensed as idle before the transmission(s) is random.The Type 1 DL CAP may be applied to the following transmissions.

[0175] - a transmission(s) initiated by the BS 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; or

[0176] - BS-initiated transmission(s) with (i) only discovery burst, or (ii) discovery burst multiplexed with non-unicast information

[0177] refer to Figure 9 , the BS may first sense whether the channel is idle during the sensing time slot duration of the postponed duration Td. After the counter N is decremented to 0, the transmission may be performed (S934). According to the following process, the counter N is adjusted by sensing the channel during the additional time slot duration (one or more).

[0178] Step 1) Set N=Ninit, where Ninit is a random number uniformly distributed between 0 and CWp, and go to step 4 (S920).

[0179] Step 2) If N>0 and the BS chooses to decrement the counter, it sets N=N-1 (S940).

[0180] Step 3) Sense the channel during the additional time slot duration, and if the additional time slot duration is idle (Y), go to step 4. Otherwise (N), go to step 5 (S950).

[0181] Step 4) If N=0 (Y) (S930), stop CAP (S932). Otherwise (N), go to step 2.

[0182] Step 5) The channel is sensed until a busy sensing slot is detected within the additional deferral duration Td or all slots of the additional deferral duration Td are sensed as idle (S960).

[0183] Step 6) If the channel is sensed to be idle during all time slots of the additional deferral duration Td (Y), go to step 4. Otherwise (N), go to step 5 (S970).

[0184] Table 9 illustrates the minimum contention window (CW), maximum CW, maximum channel occupancy time (MCOT), and allowed CW size variations applied to CAP according to the channel access priority level.

[0185] [Table 9]

[0186]

[0187] The deferral duration Td includes a duration Tf (16 μs) followed by mp consecutive sensing time slot durations, wherein each sensing time slot duration Tsl is 9 μs, and Tf includes the sensing time slot duration Tsl at which the 16 μs duration begins.

[0188] CWmin,p <= CWp <= CWmax,p. CWp is set to CWmin,p and can be updated (CW size update) based on HARQ-ACK feedback (e.g., ratio of ACK or NACK signals) for a previous UL burst (e.g., PDSCH) prior to step 1. For example, CWp can be initialized to CWmin,p based on HARQ-ACK feedback for a previous UL burst, can be increased to the next highest allowed value, or can be maintained at an existing value.

[0189] (2) Type 2 DL CAP methods

[0190] In Type 2 DL CAP, the length of the duration spanning the time(s) of transmission prior to sensing is deterministic. Type 2 DL CAP is categorized as Type 2A DL CAP, Type 2B DL CAP, and Type 2C DL CAP.

[0191] Type 2A DL CAP can apply to the following transmissions. In Type 2A DL CAP, the BS can transmit a signal immediately after sensing the channel to be idle during at least a sensing duration Tshort_dl of 25 μβ. Tshort_dl includes a duration Tf(= 16 μβ) and one contiguous sensing slot duration. Tf includes a sensing slot at the beginning of the duration.

[0192] - (i) transmission(s) initiated by the BS with (i) discovery only burst, or (ii) discovery burst multiplexed with non-unicast information, or

[0193] - (one or more) transmissions by the BS within a shared channel occupancy, after a gap of 25 μβ from (one or more) transmissions by the UE.

[0194] Type 2B DL CAP applies to (one or more) transmissions by the BS within a shared channel occupancy, after a gap of 16 μβ from (one or more) transmissions by the UE. In Type 2B DL CAP, the BS can transmit a signal immediately after sensing the channel to be idle during Tf = 16 μβ. Tf includes a sensing slot within the last 9 μβ of the duration. Type 2C DL CAP applies to (one or more) transmissions by the BS within a shared channel occupancy, after a maximum gap of 16 μβ from (one or more) transmissions by the UE. In Type 2C DL CAP, the BS does not sense the channel prior to performing the transmission.

[0195] Power headroom report (PHR)

[0196] The PHR procedure is used to provide the serving gNB with information on how much transmission power is available to the UE in addition to the power currently used for transmission. The power headroom can be calculated using the following equation.

[0197] [Equation 1]

[0198] Power headroom = UE maximum transmission power - PUSCH power = Pmax - P_pusch

[0199] If the power headroom value is (+), this indicates "I still have some headroom at maximum power," implying "I can send more data."

[0200] If the power headroom value is (-), this indicates "I am already transmitting more power than I am allowed to transmit."

[0201] Specifically, the PHR procedure is used to provide the following types of power headroom related information to the serving gNB.

[0202] - Type 1 power headroom: The difference between the UE's maximum transmit power and the estimated power of the UL Shared Channel (UL-SCH) transmission for each activated serving cell

[0203] - Type 2 power headroom: The difference between the UE's maximum transmit power and the estimated power of UL-SCH and PUCCH transmissions in a special cell (SpCell) of another MAC entity

[0204] - Type 3 power headroom: the difference between the UE's maximum transmit power and the estimated power of the Sounding Reference Signal (SRS) transmission of each activated serving cell.

[0205] Before describing the proposed method, the NR-based channel access scheme for the license-unlicensed band used in this disclosure is classified as follows.

[0206] - Category 1 (CAT-1): After a switching gap within the COT, the next transmission immediately follows the previous transmission, and the switching gap is shorter than 16μs, even including the transceiver turnaround time. Cat-1 LBT can correspond to the above-mentioned Type 2C CAP.

[0207] - Category 2 (Cat-2): LBT method without backoff. Transmission can be performed immediately once the channel is confirmed to be idle during a certain time period shortly before the transmission. Cat-2 LBT can be subdivided according to the length of the minimum sensing duration required for channel sensing immediately preceding the transmission. For example, Cat-2 LBT with a minimum sensing duration of 25 μβ can correspond to the above-mentioned Type 2A CAP, and Cat-2 LBT with a minimum sensing duration of 16 μβ can correspond to the above-mentioned Type 2B CAP. The minimum sensing duration is merely exemplary, and a minimum sensing duration smaller than 25 μβ or 16 μβ (e.g., a minimum sensing duration of 9 μβ) is also available.

[0208] - Category 3 (Cat-3): LBT method with backoff based on a fixed contention window size (CWS) i. The transmitting entity selects a random number N in the range of 0 to a (fixed) maximum CWS value, and decrements a counter value each time the channel is determined to be idle. When the counter value reaches 0, the transmitting entity is allowed to perform transmission.

[0209] - Category 4 (Cat-4): LBT method with backoff based on a variable CWS. The transmitting entity selects a random number N in the range of 0 to a (variable) maximum CWS value, and decrements a counter value each time the channel is determined to be idle. When the counter value reaches 0, the transmitting entity is allowed to perform transmission. If the transmitting entity receives feedback indicating a reception failure of the transmission, the transmitting entity will increase the maximum CWS value by one step, select a random number again within the increased CWS value, and perform the LBT procedure. Cat-4 LBT can correspond to the above-mentioned Type 1 CAP.

[0210] The following description is given under the understanding that the term band can be used interchangeably with CC / cell, and that CC / cell (index) can be replaced with a BWP (index) configured within the CC / cell, or a combination of CC / cell (index) and BWP (index).

[0211] The terms are defined as follows.

[0212] - UCI: Control information transmitted by the UE on the UL. The UCI includes various types of control information (i.e., UCI types). For example, the UCI can include HARQ-ACK (shortened as A / N or AN), SR, and CSI.

[0213] - PUCCH: Physical layer UL channel for UCI transmission. For convenience, PUCCH resources configured and / or indicated for A / N, SR, and CSI transmission are referred to as A / N PUCCH resources, SR PUCCH resources, and CSI PUCCH resources, respectively.

[0214] -UL Grant DCI: DCI for UL grant. For example, UL Grant DCI means DCI formats 0_0 and 0_1 and is transmitted on the PDCCH.

[0215] -DL assignment / grant DCI: DCI for DL ​​grant. For example, DL assignment / grant DCI means DCI formats 1_0 and 1_1, and is transmitted on the PDCCH.

[0216] -PUSCH: Physical layer UL channel used for UL data transmission.

[0217] -Slot: The basic time unit (TU) (or time interval) used for data scheduling. A slot includes multiple symbols. Here, a symbol includes an OFDM symbol (e.g., a CP-OFDM symbol or a DFT-s-OFDM symbol). In this specification, the terms symbol, OFDM-based symbol, OFDM symbol, CP-OFDM symbol, and DFT-s-OFDM symbol are interchangeable.

[0218] - Performing LBT on / about channel X: This means performing LBT in order to confirm whether to transmit channel X. For example, CAP may be performed before starting transmission of channel X.

[0219] On the LAA UL, with the introduction of asynchronous HARQ processes, there is no additional channel, such as the Physical HARQ Indicator Channel (PHICH), for indicating HARQ-ACK information for the PUSCH to the UE. Therefore, accurate HARQ-ACK information may not be used to adjust the CW size in the UL LBT process. In the UL LBT process, when a UL grant is received in the nth subframe, the first subframe of the most recent UL transmission (TX) burst before the (n-3)th subframe has been configured as a reference subframe, and the CW size has been adjusted based on the New Data Indicator (NDI) of the HARQ process ID corresponding to the reference subframe. That is, when the BS switches the NDI every one or more transport blocks (TBs) or indicates retransmission of one or more TBs, a method has been introduced: under the assumption that the transmission of the PUSCH has failed in the reference subframe due to a collision between the PUSCH and other signals, the corresponding CW size is increased to the next largest CW size of the currently applied CW size in the set of pre-agreed CW sizes, or under the assumption that the PUSCH in the reference subframe has been successfully transmitted without any collision with other signals, the CW size is initialized to the minimum value (e.g., CW min ).

[0220] In the NR system, each CC can support up to 400 MHz. When a UE operating in such a wideband CC always operates with the RF module turned on for the entire CC, the battery consumption of the UE may increase.

[0221] Alternatively, considering various communication use cases such as eMBB, URLLC and / or mMTC operating in a single wideband CC, different parameter sets (e.g., SCS) can be supported for each frequency band within the CC.

[0222] Each UE may have a different maximum bandwidth capability. In this regard, the BS can instruct the UE to operate only within a portion of the bandwidth rather than the full bandwidth of the wideband CC. For convenience, a portion of the bandwidth can be defined as a BWP. A BWP can include contiguous RBs on the frequency axis and corresponds to a set of parameters such as the SCS, CP length, and / or slot / mini-slot duration.

[0223] The BS can even configure multiple BWPs in one CC configured for the UE. For example, the BS can configure a BWP occupying a relatively small frequency region in the PDCCH monitoring time slot and schedule the PDSCH scheduled by the PDCCH in a BWP allocated to a frequency region larger than the BWP used for the PDCCH.

[0224] Alternatively, when UEs are concentrated on a specific BWP, the BS may configure another BWP where some UEs can send signals and signaling signals for load balancing.

[0225] Alternatively, considering frequency-domain inter-cell interference cancellation between adjacent cells, the BS can exclude some middle spectrum of the total bandwidth and configure both side BWPs in the same time slot. That is, the BS can configure at least one DL / UL BWP for a UE associated with a wideband CC and activate at least one of the configured DL / UL BWPs at a specific time point through L1 signaling, MAC control element (CE) signaling, or radio resource control (RRC) signaling.

[0226] In addition, the currently activated BWP may be switched to another DL / UL BWP through L1 signaling, MAC CE signaling, or RRC signaling, or the activated BWP may be switched to a predetermined DL / UL BWP when a timer value based on a timer expires.

[0227] The activated DL / UL BWP is defined as the active DL / UL BWP. During initial access or before RRC connection establishment, the UE may not receive the configuration of the DL / UL BWP. The DL / UL BWP assumed by the UE in this case is defined as the initial active DL / UL BWP.

[0228] In NR-U, when the bandwidth allocated to the base station and / or user equipment (UE) is greater than 20 MHz, the BWP can be divided into units of integer multiples of 20 MHz for fair coexistence with Wi-Fi, and LBT can be performed in units of 20 MHz. The 20 MHz frequency band, which is distinguished from LBT, is called a subband.

[0229] For UE UL data transmission in the U-band, the base station must successfully perform LBT for UL grant transmission in the U-band, and the UE must also successfully perform LBT for UL data transmission. That is, the UE can attempt to transmit UL data only if both LBT performed by the base station and the UE are successful. In LTE systems, because a minimum delay of 4 milliseconds occurs between a UL grant and the UL data scheduled by the UL grant, earlier access from another transmitting node coexisting in the U-band during the corresponding period may delay UL data transmission. In this case, a method for increasing the efficiency of UL data transmission in the U-band is needed.

[0230] In LTE LAA, the BS can notify the UE of the autonomous uplink (AUL) subframes or time slots for autonomous UL transmission through an X-bit bitmap (e.g., a 4-bit bitmap), where the UE can send UL data without receiving a UL grant. When the activation of autonomous transmission is indicated to the UE, the UE can send UL data in the subframes or time slots indicated by the X-bit bitmap even if a UL grant is not received. When sending PDSCH to the UE, the BS also sends PDCCH, which is the scheduling information required for decoding. Similarly, when sending PUSCH to the BS on AUL, the UE also sends AUL UCI, which is the information required for the BS to decode the PUSCH. The AUL UCI includes information required to receive the AUL PUSCH, such as the HARQ identity (ID), NDI, redundancy version (RV), AUL subframe start position, and AUL subframe end position, as well as information shared with the BS that the UE initiates COT.

[0231] Specifically, “sharing UE-initiated COT with BS” may indicate the following procedure.

[0232] A portion of the channel occupied by the UE can be assigned to the BS through Category 4 LBT or Type 1 CAP with random backoff, and the BS can perform 25μsec one-shot LBT based on the timing gap caused by the UE not using the end symbol. In this case, when the channel is idle due to performing one-shot LBT, the BS can transmit PDCCH and / or PDSCH. This process is called COT sharing between the UE and the BS.

[0233] To support UL transmission with relatively high reliability and relatively low time delay, NR also supports CG Type 1 and CG Type 2, in which the BS configures time, frequency, and code domain resources for the UE through higher layer signaling (e.g., RRC signaling) or a combination of higher layer signaling and L1 signaling (e.g., DCI).

[0234] In other words, even if a UL grant is not received from the BS, the UE can perform UL transmission in resources configured with Type 1 or Type 2. In Type 1, the periodicity of the CG, the offset from SFN=0, time / frequency resource allocation, the number of repetitions, the demodulation reference signal (DMRS) parameters, the modulation and coding scheme (MCS) / TBS, the power control parameters, etc. can only be configured by higher layer signaling such as RRC signaling.

[0235] Type 2 is a scheme that configures the periodicity and power control parameters of the CG through higher layer signaling such as RRC signaling, and indicates information about the remaining resources such as the offset of the initial transmission timing, time / frequency resource allocation, DMRS parameters, and MCS / TBS by activating DCI as L1 signaling.

[0236] LTE LAA's AUL and NR's CG show significant differences in the method of sending HARQ-ACK feedback for a PUSCH that a UE has sent without receiving an UL grant, and in the presence or absence of UCI sent along with the PUSCH. The HARQ process is determined by the equation of the symbol index, symbol period, and number of HARQ processes in NR's CG, while explicit HARQ-ACK feedback information is sent in the AUL Downlink Feedback Information (AUL-DFI) in LTE LAA.

[0237] In addition, in LTE LAA, whenever AUL PUSCH transmission is performed, UCI including information such as HARQ ID, NDI, and RV is also transmitted in AUL UCI. In the case of NR CG, the BS identifies the UE by the time / frequency resources and DMRS resources used by the UE for PUSCH transmission, while in the case of LTE LAA, the BS identifies the UE by explicitly including the UE ID in the AUL UCI transmitted together with the PUSCH and DMRS resources.

[0238] The BS can configure the CG resources for the UE as Type 1 or Type 2, and the UE can perform UL transmission by performing LBT on the configured time / frequency resources. The BS can share the COT obtained through Cat-4 LBT with the UE, so that the UE can only perform Cat-2 LBT within the BS's COT to increase the channel access probability. Similarly, the UE can share the COT obtained by performing Cat-4 LBT for CG PUSCH transmission or DG PUSCH transmission outside the BS's COT with the BS, so that the BS can perform DL transmission by performing Cat-2 LBT within the remaining COT after the UE performs UL transmission.

[0239] When performing this UL-to-DL COT sharing, the transmission power of the UE and the base station may differ. If the base station transmits a signal with relatively high DL power in the COT that the UE acquires based on an energy detection (ED) threshold calculated based on the maximum UL power configured for the UE, this may cause severe interference or transmission collisions with other neighboring nodes. Therefore, the base station can configure the ED threshold for UL-to-DL COT sharing for the UE through higher-layer signaling such as RRC signaling.

[0240] Therefore, the UE may have a first ED threshold calculated based on the maximum UL power configured by the BS according to the Energy Detection Threshold Adaptation Procedure defined in Section 4.1.5 of 3GPP TS 37.213 and a second ED threshold configured by the BS for UL-to-DL COT sharing, and selectively use one ED threshold depending on whether the COT is shared during UL transmission. Alternatively, the second ED threshold configured by the BS may always be used as a default value.

[0241] In this case, the UE can inform the BS whether COT sharing is allowed by including information about which ED threshold or UL power has been used to perform LBT and UL transmission in the CG-UCI. Here, "the UE notifies the BS whether COT sharing is allowed" may mean that the UE notifies the BS whether other DL transmissions other than PDCCH transmissions up to 2 symbols may be within the shared COT.

[0242] In the case of DL to UL COT sharing, the UE can receive a signal such as GC-PDCCH from the BS, which includes information on whether CG-PUSCH can be transmitted within the COT, and perform Cat-2 LBT. Then, if the channel is idle, the UE can perform UL transmission.

[0243] In this case, the ED threshold for Cat-2 LBT may use the ED threshold configured by the BS or use the ED threshold of the UE based on the UL power configuration of the UE, as described above.

[0244] Unlike LTE AUL, if the frequency-axis resources for CG are configured as a wideband of 20 MHz or more, the frequency-axis resources may include multiple LBT subbands in units of 20 MHz. In order for the UE to perform UL transmission on the corresponding CG-PUSCH resource, transmission is allowed only when the UE successfully performs LBT in all LBT subbands as a result of performing LBT in each LBT subband. In addition, even when the remaining COT is shared and used for DL ​​transmission, DL transmission may be allowed only in subbands that are equal to or smaller than the LBT subband in which the UE successfully performed LBT.

[0245] As described in clause 4.2.1 of 3GPP TS 37.213, UE transmission operation without LBT is supported when DG-PUSCH on LTE AUL is scheduled in consecutive subframes with no gaps with AUL-PUSCH if the conditions described in the following [Table 10] are met.

[0246] [Table 10]

[0247]

[0248] Even in NR-U, if the DG-PUSCH is scheduled continuously without gaps in the timeline resources of the CG configured for the UE, that is, in the case of CG-DG back-to-back scheduling, the UE can send DG-PUSCH without LBT only when the frequency band of the DG-PUSCH has the same LBT subband as the frequency band of the CG-PUSCH. In this case, there should be no gap between the end symbol of the CG-PUSCH and the start symbol of the DG-PUSCH. If there is a gap or the LBT subbands are not equal, an LBT gap corresponding to a specific X symbols immediately before the DG-PUSCH may be required for the UE to perform LBT.

[0249] In NR, with respect to multiple CCs / cells configured for a UE, the BS can simultaneously receive PHRs for all CCs / cells through the DG-PUSCH or CG-PUSCH transmitted in one CC / cell. Each CC / cell may be a U-cell operating in the U-band, a cell operating in the L-band, or a CC / cell in which a supplementary UL (SUL) is additionally configured.

[0250] There are two types of PHR information that can be included in the DG-PUSCH or CG-PUSCH: the actual PHR based on the power used by the UE for the actual transmission of the PUSCH and the virtual PHR based on the reference transmission format defined in Section 7.7 of 3GPP TS 38.213. The reference transmission format is a transmission format used to virtually calculate the PHR in the absence of PUSCH transmission. For example, such a transmission format can be defined based on one RB and the lowest MCS level.

[0251] In the case of a CG-PUSCH or DG-PUSCH transmitted through a carrier of the L-band, there is no possibility of confusion between the actual PHR and the virtual PHR because transmission is always guaranteed. However, a CG-PUSCH transmitted through a carrier of the U-band may be transmitted or may be discarded, depending on whether the UL LBT is successful. Therefore, if the CG-PUSCH of the NR-U cell including the PHR report cannot be transmitted due to LBT failure or if the LBT of the PUSCH of another CC / cell fails, the BS may be confused as to whether the PHR transmitted at the retransmission time point is the actual PHR or the virtual PHR. To solve this problem, a method may be considered in which only the virtual PHR is always transmitted when the PHR is transmitted through the CG-PUSCH of the NR-U cell, or the UE may signal to the BS which of the actual PHR and the virtual PHR has been transmitted through the CG-UCI.

[0252] Hereinafter, proposed methods for solving the above problems will be described. Specifically, [Proposed Method #1] to [Proposed Method #3] describe an ED threshold used by the UE based on whether to share COT and a method for performing LBT and / or transmitting PUSCH based on the ED threshold.

[0253] [Proposed Method #4] describes the conditions for the UE to transmit DG-PUSCH without LBT for CG-DG PUSCH back-to-back transmission and the UE's operation when the conditions are not met.

[0254] [Proposed Method #5] and [Proposed Method #6] describe methods for UE to send PHR.

[0255] [Proposed method #1] to [Proposed method #6] are not always performed independently. In other words, [Proposed method #1] to [Proposed method #6] may be operated / performed individually, but two or more proposed methods may be operated / performed in combination.

[0256] For example, [proposed method #1], [proposed method #4], and [proposed method #5] can be combined to perform the operation of the UE and / or the BS, and [proposed method #1], [proposed method #2], and [proposed method #3] can be combined to perform the operation of the UE and / or the BS. That is, [proposed method #1] through [proposed method #6] are not optional and are classified for convenience of explanation.

[0257] In addition, the embodiments of [proposed method #1] through [proposed method #6] described below according to the disclosure are not limited to the U band, and can be applied to the operation between the UE and the BS which transmits and receives UL / DL signals through a frequency band in which LBT-based CAP can be performed.

[0258] For example, [proposed method #1] through [proposed method #6] described below can also be applied to the operation between the UE and the BS which transmits and receives UL / DL signals through a Citizens Broadband Radio Service (CBRS) band.

[0259] In addition, "performing LBT" can have the same meaning as "performing CCA". A series of procedures in which UL / DL signals are transmitted and received through a frequency band in an idle state based on LBT and / or CCA is defined as CAP. Thus, performing LBT and / or CCA can have the same meaning as performing CAP.

[0260] [proposed method #1] A method in which, when a first ED threshold to be used for performing UL LBT for UL-to-DL COT sharing is received from the BS through higher layer signaling such as RRC signaling, the UE selects an ED threshold to be used for LBT performed before transmitting CG-PUSCH and indicates the selected ED threshold through CG-UCI as follows

[0261] (1) A method of performing UL LBT based on a first ED threshold configured through higher layer signaling and transmitting CG-UCI including information about the first ED threshold so that the UE shares a remaining COT after transmitting CG-PUSCH with the BS

[0262] (2) A method of performing UL LBT based on a second ED threshold calculated according to a maximum UL power configured by the BS, instead of a first ED threshold configured through higher layer signaling, and transmitting CG-UCI including information about the second ED threshold so that the UE does not allow DL transmission other than PDCCH transmission of up to 2 symbols of the BS in the remaining COT after transmitting CG-PUSCH.

[0263] Reference will be made to Figure 10The above-mentioned [Proposed Method #1] is described in detail. The UE may share the COT for CG PUSCH transmission or DG PUSCH transmission obtained by performing Cat-4 LBT with the BS, so that the BS may transmit a DL signal and / or DL ​​channel after performing Cat-2 LBT within the remaining COT after the UE performs UL transmission.

[0264] However, when the transmission power of the UE and the BS is different and the BS transmits a DL signal and / or DL ​​channel with a relatively large DL power in the COT obtained by the UE based on the second ED threshold calculated according to the maximum UL power configured for the UE, this may cause severe interference or transmission collision with other neighboring nodes. Therefore, the BS can configure the UE with a first ED threshold for UL-to-DL COT sharing through higher layer signaling such as RRC signaling (S1001).

[0265] In addition, the UE can select one of a second ED threshold calculated based on the maximum UL power configured by the BS and a first ED threshold configured by the BS for UL to DL COT sharing, according to whether DL transmission other than PDCCH transmission of up to 2 symbols is allowed within the COT shared with the BS, and perform UL LBT and UL transmission based on the selected ED threshold.

[0266] In this case, when the UE shares the COT with the BS, by transmitting information about which ED threshold of the first ED threshold and the second ED threshold (or UL power based on the selected threshold) has been used to perform LBT and UL transmission in the CG-UCI, the UE can inform the BS whether DL transmission other than PDCCH transmission of up to 2 symbols is allowed within the shared COT. Here, "up to 2 symbols" may mean a duration corresponding to a length of up to 2 symbols based on a 15-kHz SCS. For example, the length of up to 2 symbols based on a 15-kHz SCS may be a duration corresponding to a length of up to 4 symbols based on a 30-kHz SCS and a duration corresponding to a length of up to 8 symbols based on a 60-kHz SCS.

[0267] Alternatively, when the UE shares the COT with the BS, by transmitting information about the length of the remaining COT in the CG-UCI based on 2 symbols for the 15-kHz SCS, the UE can inform the BS whether other DL transmissions including PDCCH transmissions of up to 2 symbols are allowed within the shared COT. As described above, the information about the length of the remaining COT can be included in the CG-UCI based on 4 symbols for the 30-kHz SCS or 8 symbols for the 60-kHz SCS.

[0268] Alternatively, when COT is shared, if only PDCCH transmission of up to 2 symbols is always allowed, that is, if DL transmission other than PDCCH transmission of up to 2 symbols is not allowed, the UE can indicate that DL transmission other than PDCCH transmission of 2 symbols is not allowed by sending information indicating that there is no remaining length of COT to the BS in CG-UCI (S1003). That is, upon receiving information indicating that there is no remaining COT length from the UE through CG-UCI, the BS can interpret this information as meaning that DL transmission other than PDCCH transmission of up to 2 symbols (based on 15-kHz SCS) is not allowed. Alternatively, upon receiving information indicating that there is no remaining COT length from the UE through CG-UCI, the BS can interpret this information as meaning that the UE has sent CG-PUSCH using the second ED threshold instead of using the first ED threshold.

[0269] That is, if the UE notifies the BS through CG-UCI that UL LBT and UL transmission are performed based on the first ED threshold configured by the BS, the BS can perform DL transmission such as PDSCH transmission of more symbols including PDCCH transmission of 2 symbols by sharing the COT of the UE. In this case, the BS can perform DL transmission based on Cat-2 LBT within the shared COT. On the contrary, if the UE notifies the BS through CG-UCI that UL LBT and UL transmission are performed based on the second ED threshold calculated according to the maximum UL power, the BS can recognize that DL transmission other than 2-symbol PDCCH transmission shared using COT cannot be performed. In this case, the BS can perform DL transmission based on Cat-4 LBT (S1005).

[0270] In other words, when a BS configures COT sharing for a UE and the BS transmits a DL signal within the shared COT, if the BS transmits the DL signal at a relatively high power, the DL signal transmitted by the BS may interfere with or collide with signals from other nodes. Therefore, the BS may configure a first ED threshold for COT sharing, and the UE may perform UL LBT based on the first ED threshold when the COT is shared. For example, if a UE performs UL LBT based on a relatively low first ED threshold and transmits a UL signal by determining that the corresponding channel is idle, this means that other nodes will not transmit signals at a power exceeding the first ED threshold in the corresponding channel. This may also mean that there are relatively few signals from other nodes with which the BS's DL signal may interfere. Accordingly, the BS may configure a relatively low first ED threshold so that the UE can perform UL LBT based on the first ED threshold while sharing the COT.

[0271] However, even if the BS configures the UE can share the COT, the UE does not have to always share the COT. That is, when the UE should use all of the COT in order to transmit the CG-PUSCH or use only a very short length of the COT to receive another DL signal, the UE can not share the COT and use all of the COT to transmit the CG-PUSCH.

[0272] However, even in this case, if the UE should use the first ED threshold to perform the UL LBT, the probability of the UL LBT success is reduced, which can result in only a reduced channel access opportunity of the UE. Therefore, it is advantageous for the UE to perform the UL LBT using the second ED threshold calculated based on the maximum UL power if the COT is not shared.

[0273] Here, not sharing the COT can mean that no other DL signal transmission than the 2-symbol PDCCH transmission of the BS is allowed within the COT.

[0274] Therefore, the UE can selectively use the ED threshold according to whether the COT is shared or not. For example, if the COT is shared, the UE can use the first ED threshold to perform the UL LBT, and if the COT is not shared, the UE can use the second ED threshold to perform the UL LBT.

[0275] In this case, only when the BS identifies whether the UE shares the COT and / or which ED threshold is used, the BS can perform an appropriate operation such as DL transmission and / or UL reception. Therefore, the UE can transmit relevant information in the CG-UCI multiplexed with the CG-PUSCH to the BS.

[0276] For example, the UE includes and transmits information on whether the COT is shared (i.e., information on whether the sharing of the COT is possible) in the CG-UCI. When the BS receives the CG-UCI, the BS can know whether the COT sharing is possible and which ED threshold has been used by the UE through the information included in the CG-UCI. For example, if the CG-UCI received by the BS includes information indicating that the COT sharing is possible, the BS can identify that the UE has performed the UL LBT using the first ED threshold. In contrast, if the CG-UCI includes information that the COT cannot be shared, the BS can identify that the UE will perform the UL LBT using the second ED threshold.

[0277] As another example, the UE may include information about the ED threshold used for UL LBT in the CG-UCI. For example, if information about the first ED threshold is included in the CG-UCI received by the BS, the BS recognizes that the UE has performed UL LBT using the first ED threshold and that COT sharing is possible. Conversely, if information about the second threshold is included in the CG-UCI received by the BS, the BS may recognize that the UE has performed UL LBT using the second ED threshold and that COT sharing is not possible. That is, the UE may explicitly transmit one of the information about which ED threshold is used and the information about whether COT sharing is possible, and implicitly transmit the other to the BS in association with the explicit information.

[0278] However, the UE can explicitly include all information about which ED threshold to use and information about whether COT sharing is possible in the CG-UCI and send the CG-UCI to the BS.

[0279] [Proposed Method #2] A method that, upon receiving a first ED threshold to be used for UL LBT for UL-to-DL COT sharing from a BS through higher layer signaling such as RRC signaling, uses one of (i) a first ED threshold configured through the higher layer signaling and (ii) a second ED threshold calculated by the UE based on the maximum UL power configured by the BS as an ED threshold to be used for LBT performed before the UE transmits a DG-PUSCH.

[0280] Specifically, reference will be made to Figure 11 [Proposed Method #2] is described in detail. In the case of DG-PUSCH, since there is no method for notifying the BS of which ED threshold has been used through a UL signal such as CG-UCI as in [Proposed Method #1], the UE can perform UL LBT using the ED threshold indicated by the scheduling of the UL grant sent by the BS and transmit the PUSCH (S1105). In other words, upon receiving a DG-PUSCH scheduled based on the first ED threshold for UL to DL COT sharing from the UE, the BS can transmit other DL (e.g., PDSCH) signals including a 2-symbol PDCCH in the remaining COT after the DG-PUSCH transmission ends.

[0281] Upon receiving a DG-PUSCH indicating that UL LBT and UL transmission are performed using a second ED threshold calculated by the UE based on the maximum UL power, the BS may transmit a PDCCH of up to 2 symbols after the DG-PUSCH transmission ends (S1103). To this end, the BS may configure the UE with a first ED threshold for UL to DL COT sharing (S1101) through higher layer signaling such as RRC signaling.

[0282] In other words, when the BS instructs the UE to use the first ED threshold for COT sharing through a UL grant, the BS can share the UE's COT to transmit other DL signals and / or DL ​​channels, including a PDCCH of up to 2 symbols. That is, the BS can perform DL transmission based on Cat-2 LBT within the shared COT. Conversely, when the BS instructs the UE to use the second ED threshold calculated based on the maximum UL power through a UL grant, the BS can only transmit PDCCH of up to 2 symbols within the UE's COT. In this case, the BS can perform DL transmission based on Cat-4 LBT (S1107).

[0283] [Proposed Method #3] A method of selecting an ED threshold for DG-PUSCH or CG-PUSCH transmission based on Cat-2 LBT by sharing the remaining COT after DL transmission within the COT of the BS, upon receiving a first ED threshold to be used for UL LBT for UL to DL COT sharing from the BS through higher layer signaling such as RRC signaling

[0284] (1) Method using the first ED threshold configured by the BS

[0285] (2) Method for calculating the second ED threshold using the maximum UL power configured by the UE based on the BS

[0286] (3) Using the Max(first ED threshold, second ED threshold) method

[0287] (4) Method using Min(first ED threshold, second ED threshold)

[0288] Will refer to Figure 12 The above-mentioned [proposed method #3] is described in detail. The BS may configure a first ED threshold for UL to DL COT sharing for the UE through higher layer signaling such as RRC signaling (S1201). The BS may perform DL transmission (e.g., PDSCH) to the UE using the COT obtained based on Cat-4 LBT (S1203). In the case of DL to UL COT sharing, the UE performs Cat-2 LBT by receiving an indication / configuration of whether to transmit CG-PUSCH within the COT from the BS through a physical layer signal such as GC-PDCCH or through a higher layer signal. If the channel is idle, the UE may perform UL transmission (S1205). In this case, the ED threshold of the UE for Cat-2 LBT may be the first ED threshold configured by the BS as in (1) or the second ED threshold of the UE based on the power configured based on the maximum UL power configured by the UE as in (2). Alternatively, the UE may use a larger or smaller value between the first ED threshold of (1) and the second ED threshold of (2) as the ED threshold (S1205).

[0289] [Proposed Method #4] A method that performs back-to-back transmission of CG-DGPUSCH with respect to DG-PUSCH scheduled based on UL grant according to the following conditions while transmitting CG-PUSCH after performing Cat-4 LBT on the configured grant resources configured by the base station. Here, the CG-UL resources may include multiple LBT subbands.

[0290] (1) A method in which, when there is no gap between the end symbol of CG-PUSCH and the start symbol of DG-PUSCH on the time axis, and the LBT subband resource of the CG-PUSCH that has been sent on the frequency axis and the LBT subband resource of the scheduled DG-PUSCH are the same or the LBT subband to which the DG-PUSCH is allocated is a subset of the LBT subband of the CG-PUSCH, DG-PUSCH is continuously sent immediately after the CG-PUSCH without LBT.

[0291] (2) A method in which, when there is a gap between the end symbol of CG-PUSCH and the start symbol of DG-PUSCH, the LBT subband resources of the CG-PUSCH already transmitted on the frequency axis are different from the LBT subband resources of the scheduled CG-PUSCH, or the LBT subband to which the DG-PUSCH is allocated is not included in the LBT subband of the CG-PUSCH (i.e., the LBT subband of the DG-PUSCH is not a subset of the LBT subband of the CG-PUSCH), specific X symbols, Y CG-PUSCHs, or Z time slots are dropped immediately before the DG-PUSCH in order to ensure LBT before transmitting the DG-PUSCH.

[0292] In this case, the X, Y, and Z values ​​for how many symbols, how many CG-PUSCHs, and how many time slots are to be dropped for the LBT gap may use values ​​specified in the standard. Alternatively, the X, Y, and Z values ​​may use values ​​configured / indicated by the BS through higher layer signaling such as RRC signaling, physical layer signaling such as DCI, or a combination of higher layer signaling and physical layer signaling. In the above proposed method, back-to-back transmission of DG-PUSCH to CG-PUSCH can be performed by rearranging the order of CG-PUSCH to DG-PUSCH and DG-PUSCH to CG-PUSCH.

[0293] In (2), when the priority of DG-PUSCH is higher than that of CG-PUSCH, there is a gap between DG-PUSCH and CG-PUSCH, or the LBT subband resources of DG-PUSCH and CG-PUSCH are different, the UE may discard the transmission of CG-PUSCH after DG-PUSCH.

[0294] In LTE LAA, when DG-PUSCH is scheduled in consecutive subframes and has no gaps with AUL-PUSCH, the UE can transmit DG-PUSCH without LBT (clause 4.2.1 of 3GPP TS 37.213).

[0295] Similarly, refer to Figure 13 The above-mentioned [proposed method #4] is described in detail. When CG-PUSCH is transmitted based on Cat-4 LBT even in NR-U (S1303), if DG-PUSCH is continuously scheduled by UL grant without a gap with the timeline resource of the CG configured for the UE (S1301), that is, in the case of CG-DG back-to-back scheduling, the UE can transmit DG-PUSCH without LBT. In this case, unlike LTE, in NR-U, since the bandwidth of the CG resource configured for the UE is greater than 20MHz, multiple LBT subbands can be included in the CG resource. Therefore, in order to continuously transmit DG-PUSCH without LBT using the COT obtained for CG-PUSCH, the frequency band of the scheduled DG-PUSCH should be included in the frequency band of CG-PUSCH. That is, the LBT subband of DG-PUSCH should be the same as the LBT subband of CG-PUSCH, or the LBT subband of DG-PUSCH should be a subset of the LBT subband of CG-PUSCH. Similar to the case of LTE LAA, there should be no time gap between CG-PUSCH and DG-PUSCH (S1305).

[0296] For example, reference Figure 14 , if LBT subband #1 and LBT subband #2 are allocated as CG resources and DG-PUSCH is scheduled while CG-PUSCH is transmitted by performing LBT on CG-PUSCH, LBT subband #1 and LBT subband #2 can be allocated as LBT subbands of DG-PUSCH so that the LBT subband of DG-PUSCH is the same as the LBT subband of CG resources, or LBT subband #1 or LBT subband #2 can be allocated as LBT subband of DG-PUSCH so that the LBT subband of DG-PUSCH is a subset of the LBT subband of CG resources.

[0297] However, the subset relationship does not necessarily have to be satisfied in units of LBT subbands. For example, assuming Figure 14Each LBT subband illustrated in the figure includes 10 RBs with indexes #0 to #9, respectively. Since the UE has performed LBT on a total of 20 RBs included in subband #1 and LBT subband #2 for CG-PUSCH transmission, even in the case where RBs with indexes #5 to #9 of LBT subband #1 and RBs with indexes #0 to #4 of LBT subband #2 are allocated as frequency resources for DG-PUSCH, and in the case where RBs with indexes #0 to #9 of LBT subband #1 and RBs with indexes #0 to #9 of LBT subband #2 are allocated as LBT subbands for DG-PUSCH, the UE can send DG-PUSCH without LBT.

[0298] That is to say, the frequency resources (or frequency domain) used for DG-PUSCH transmission should be included in or be the same as the frequency resources (or frequency domain) used for CG-PUSCH transmission. This inclusion relationship does not need to satisfy the subset relationship in units of LBT subbands. Even in the case where the LBT subbands for DG-PUSCH are configured on the LBT subbands of two CG-PUSCHs, it can be said that the frequency resources of DG-PUSCH are included in the frequency resources of CG-PUSCH. In other words, the frequency resources used for DG-PUSCH transmission need to have a subset relationship with respect to all frequency resources used for CG-PUSCH transmission.

[0299] In other words, when there is no gap between the end symbol of CG-PUSCH and the start symbol of DG-PUSCH on the time axis, and the LBT subband resources of the transmitted CG-PUSCH on the frequency axis are the same as the DG-PUSCH scheduled for the UE or the LBT subband / LBT frequency resources of the DG-PUSCH are included in the LBT subband / LBT frequency resources of the CG-PUSCH, the UE can continue to send DG-PUSCH immediately after the CG-PUSCH without LBT.

[0300] However, if there is a gap between the end symbol of CG-PUSCH and the start symbol of DG-PUSCH on the time axis, or if the LBT subband resources of the CG-PUSCH already sent on the frequency axis and the LBT subband resources of the scheduled DG-PUSCH are different, that is, if the LBT subband of DG-PUSCH is not included in the LBT subband of CG-PUSCH, the UE cannot send DG-PUSCH without LBT.

[0301] In this case, the UE should drop a specific number of X symbols, Y CG-PUSCHs, or Z time slots immediately before the DG-PUSCH in order to ensure LBT clearance before sending the DG-PUSCH. The X, Y, or Z values ​​for how many symbols, how many CG-PUSCHs, or how many time slots are dropped to ensure LBT clearance can use values ​​specified in the standard. Alternatively, the X, Y, or Z values ​​can be configured / indicated to the UE by the BS through higher layer signaling, physical layer signaling, or a combination of higher layer signaling and physical layer signaling, and the UE can drop symbols, CG-PUSCHs, or time slots using the configured / indicated values.

[0302] In addition, the same method can be applied even when the order of CG-PUSCH and DG-PUSCH is reversed, that is, in the case of back-to-back DG-CG transmission. In other words, if there is no time gap between DG-PUSCH and CG-PUSCH on CG resources configured continuously immediately after DG-PUSCH, and if CG-PUSCH and DG-PUSCH are transmitted through the same LBT and the LBT subband of CG-PUSCH is a subset of the subband of DG-PUSCH, the UE can continue to transmit CG-PUSCH without LBT immediately after the end of DG-PUSCH transmission. However, because DG-PUSCH has a higher priority than CG-PUSCH, if there is a time gap between DG-PUSCH and CG-PUSCH or if the LBT subband of DG-PUSCH and the LBT subband of CG-PUSCH are different, the UE can skip CG-PUSCH transmission without dropping specific X symbols of DG-PUSCH or Y DG-PUSCH, as in (2).

[0303] [Proposed method #5] A method in which, when a UE sends a PHR for each CC in a CG-PUSCH sent in an NR-U cell in a scenario where multiple L cells or multiple U cells such as an NR-U cell are configured for the UE, a virtual PHR is always sent or whether the PHR included in the CG-PUSCH is a virtual PHR or an actual PHR is indicated through CG-UCI.

[0304] refer to Figure 15 In NR, regarding multiple CCs / cells configured for a UE, the BS can simultaneously receive PHRs for all CCs / cells through a DG-PUSCH or CG-PUSCH transmitted in one CC / cell (S1501). In this case, each CC / cell may be a U-cell operating in a U-band, a cell operating in an L-band, or a CC / cell in which a SUL is additionally configured.

[0305] There are two types of PHR information that can be included in the DG-PUSCH or CG-PUSCH: actual PHR based on the power of the PUSCH actually transmitted by the UE and virtual PHR based on the reference format defined in clause 7.7 of 3GPP TS 38.213.

[0306] Because CG-PUSCH or DG-PUSCH transmission in a licensed carrier is always guaranteed, there is no possibility that the BS will generate confusion as to whether the PHR included in the PUSCH is an actual PHR or a virtual PHR. However, depending on whether the UL LBT is successful, the CG-PUSCH transmitted in the unlicensed carrier may be transmitted or discarded. In this case, if the CG-PUSCH of the NR-U cell including the PHR report is not transmitted due to LBT failure, even when the CG-PUSCH including the PHR is retransmitted through the next CG resource, the BS may generate confusion as to whether the PHR included in the CG-PUSCH is an actual PHR or a virtual PHR, because the BS cannot distinguish whether the CG-PUSCH is initially transmitted or retransmitted.

[0307] To solve this problem, when the UE sends a PHR for each CC in the CG-PUSCH sent in the NR-U cell in a case where multiple L-cells or multiple U-cells such as NR-U cells are configured for the UE, the UE may always send a virtual PHR, or may inform the BS whether the PHR included in the CG-PUSCH is a virtual PHR or an actual PHR through a bitmap for each CC / cell in the CG-UCI. For example, when the number of CCs / cells configured for the UE is 8, the CG-UCI may include an 8-bit bitmap. When the bit value is "0" (or "1"), this may indicate that the PHR for the corresponding CC / cell is an actual PHR, and when the bit value is "1" (or "0"), this may indicate that the PHR for the corresponding CC / cell is a virtual PHR. The size of the bitmap included in the CG-UCI may be changed or fixed according to the number of CCs / cells configured for the UE. If the number of CCs / cells smaller than the bitmap size is configured for the UE in a case where the bitmap size is fixed, the remaining bits may be filled with zeros. For example, if the bitmap size is 8 bits and the number of CCs / cells configured for the UE is 4, the UE can notify the BS of the PHR information for each CC / cell through the first 4 bits, and the remaining 4 bits can be padded with zeros. If the number of CCs / cells configured for the UE is greater than the bitmap size, the BS can obtain the PHR information through a modulo operation. For example, if the bitmap size is 8 bits and 10 CCs / cells #0 to #9 are configured for the UE, the first bit of the bitmap can indicate whether the PHR for CC / cell #0 and CC / cell #8 is a virtual PHR or an actual PHR.

[0308] In addition, for cells where SUL is configured, the UE can simultaneously transmit not only the PHR for the SUL carrier but also the PHR for the normal uplink (NUL) carrier. In this case, the UE can configure and transmit PHR reports for both carriers as virtual PHR and type 1 PHR.

[0309] In addition, when the UE simultaneously sends a PHR for the NUL carrier and a PHR for the SUL carrier for a cell configured with SUL, the UE may configure and send PHR reports for both carriers as virtual PHRs, and configure and send PHR reports for carriers in which PUSCH is configured as type 1 PHRs, and PHR reports for carriers in which PUSCH and / or PUCCH are not configured or carriers in which PUSCH and / or PUCCH are not configured but SRS switching is configured as type 3 PHRs.

[0310] [Proposed method #6] A method in which, when multiple L-cells or multiple U-cells such as NR-U cells are configured for a UE, both a SUL carrier and a NUL carrier are configured in a specific cell, and PUSCH or PUCCH transmission can be configured in each carrier, (1) PHR is configured and transmitted only for carriers configured with PUSCH / PUCCH among the SUL carrier and the NUL carrier, (2) information on PHR for predefined / configured / indicated carriers is transmitted, or (3) information on carriers corresponding to PHR included in CG-PUSCH is indicated through CG-UCI or MAC CE.

[0311] The carrier for which the PHR is reported may be a carrier configured with PUCCH or PUSCH among the SUL carrier and the NUL carrier. The PHR type may be fixed to a specific PHR type (e.g., type 1), or may be configured for / instructed to the UE to use a specific one of type 1 and type 3. In addition, the UE may be configured / instructed to always send the PHR as a virtual PHR, or to send one of a virtual PHR and an actual PHR.

[0312] Multiple L-cells or U-cells can be configured for a UE. In addition, both the NUL carrier and the SUL carrier can be configured in a specific cell, and PUSCH or PUCCH transmission can be configured in at least one of the two carriers. In this case, PHR reports for all cells / CCs configured for the UE can be sent via CG-PUSCH transmitted in the U-cell. If PUSCH or PUCCH transmission is configured in only one of the NUL carrier and the SUL carrier, the UE can only send PHR for the carrier where PUSCH or PUCCH transmission is configured.

[0313] Alternatively, even if PUSCH transmission is configured for both the SUL carrier and the NUL carrier, only the PHR for the previously configured / indicated / defined carrier may be transmitted. Alternatively, only the PHR for a specific carrier among the two carriers configured with PUSCH or PUCCH transmission may be transmitted, and information about the carrier corresponding to the transmitted PHR may be notified to the BS through the CG-UCI or MAC CE.

[0314] The various descriptions, functions, processes, proposals, methods and / or operational flowcharts of the present disclosure described herein may be applied to, but not limited to, various fields requiring wireless communication / connectivity between devices (e.g., 5G).

[0315] More specific examples will be described below with reference to the accompanying drawings. In the following drawings / descriptions, unless otherwise specified, similar reference numerals represent identical or corresponding hardware blocks, software blocks, or functional blocks.

[0316] Figure 16 The diagram shows a communication system 1 applied to the present disclosure.

[0317] refer to Figure 16 , the communication system 1 applied to the present disclosure includes wireless devices, a BS, and a network. A wireless device is a device that performs communication using a radio access technology (RAT) (e.g., 5G NR (or new RAT) or LTE), also known as a communication / radio / 5G device. The wireless device may include, but is not limited to, a robot 100a, vehicles 100b-1 and 100b-2, an extended reality (XR) device 100c, a handheld device 100d, a home appliance 100e, an IoT device 100f, and an artificial intelligence (AI) device / server 400. For example, a vehicle may include a vehicle with wireless communication capabilities, an autonomous vehicle, and a vehicle capable of performing vehicle-to-vehicle (V2V) communication. Here, a vehicle may include an unmanned aerial vehicle (UAV) (e.g., a drone). XR devices may include augmented reality (AR) / virtual reality (VR) / mixed reality (MR) devices and may be implemented in the form of a head-mounted device (HMD), a head-up display (HUD) installed in a vehicle, a television (TV), a smartphone, a computer, a wearable device, a home appliance, a digital signage, a vehicle, a robot, and the like. Handheld devices may include smartphones, smartpads, wearable devices (e.g., smartwatches or smart glasses), and computers (e.g., laptops). Home appliances may include televisions, refrigerators, washing machines, and the like. IoT devices may include sensors, smart meters, and the like. For example, the BS and network may be implemented as wireless devices, and a specific wireless device 200a may serve as a BS / network node for other wireless devices.

[0318] Wireless devices 100a to 100f can be connected to a network 300 via a BS 200. AI technology can be applied to wireless devices 100a to 100f, and wireless devices 100a to 100f can be connected to an AI server 400 via the network 300. The network 300 can be configured using a 3G network, a 4G (e.g., LTE) network, or a 5G (e.g., NR) network. Although wireless devices 100a to 100f can communicate with each other via the BS 200 / network 300, wireless devices 100a to 100f can perform direct communication (e.g., sidelink communication) with each other without the intervention of the BS / network. For example, vehicles 100b-1 and 100b-2 can perform direct communication (e.g., V2V / Vehicle-to-Everything (V2X) communication). IoT devices (e.g., sensors) can perform direct communication with other IoT devices (e.g., sensors) or other wireless devices 100a to 100f.

[0319] Wireless communications / connections 150a, 150b, and 150c may be established between wireless devices 100a to 100f and BS 200, and between BSs 200. Wireless communications / connections may be established via various RATs (e.g., 5G NR), such as UL / DL communication 150a, sidelink communication 150b (or D2D communication), or inter-BS communication 150c (e.g., relay or integrated access backhaul (IAB)). Wireless signals may be transmitted and received between wireless devices, between wireless devices and BSs, and between BSs via the wireless communications / connections 150a, 150b, and 150c. For example, signals may be transmitted and received on various physical channels via the wireless communications / connections 150a, 150b, and 150c. To this end, at least a portion of various configuration information configuration processes, various signal processing processes (e.g., channel coding / decoding, modulation / demodulation, and resource mapping / demapping), and resource allocation processes for transmitting / receiving wireless signals may be performed based on various suggestions of the present disclosure.

[0320] Figure 17 The diagram illustrates a wireless device suitable for use with the present disclosure.

[0321] refer to Figure 17 , the first wireless device 100 and the second wireless device 200 can transmit wireless signals via various RATs (e.g., LTE and NR). {The first wireless device 100 and the second wireless device 200} may correspond to Figure 16 {wireless device 100x and BS 200} and / or {wireless device 100x and wireless device 100x}.

[0322] The first wireless device 100 can include one or more processors 102 and one or more memories 104, and can further include one or more transceivers 106 and / or one or more antennas 108. The processor(s) 102 can control the memory(s) 104 and / or the transceiver(s) 106, and can be configured to implement the descriptions, functions, procedures, proposals, methods and / or operational flowcharts disclosed in the present document. For example, the processor(s) 102 can process information within the memory(s) 104 to generate first information / signals, and then transmit wireless signals including the first information / signals through the transceiver(s) 106. The processor(s) 102 can receive wireless signals including second information / signals through the transceiver(s) 106, and then store information obtained by processing the second information / signals in the memory(s) 104. The memory(s) 104 can be connected to the processor(s) 102 and store multiple pieces of information related to the operation of the processor(s) 102. For example, the memory(s) 104 can store software code including instructions for executing some or all of the procedures controlled by the processor(s) 102 or for executing the descriptions, functions, procedures, proposals, methods and / or operational flowcharts disclosed in the present document. The processor(s) 102 and the memory(s) 104 can be part of a communication modem / circuitry / chip designed to implement a RAT (e.g., LTE or NR). The transceiver(s) 106 can be connected to the processor(s) 102, and transmit and / or receive wireless signals through the one or more antennas 108. Each of the transceiver(s) 106 can include a transmitter and / or a receiver. The transceiver(s) 106 can be used interchangeably with radio frequency (RF) unit(s). In the present disclosure, a wireless device can be a communication modem / circuitry / chip.

[0323] The second wireless device 200 may include one or more processors 202 and one or more memories 204, and may further include one or more transceivers 206 and / or one or more antennas 208. The processor 202 may control the memory 204 and / or the transceiver 206 and may be configured to implement the descriptions, functions, processes, proposals, methods, and / or operational flow charts disclosed in this document. For example, the processor 202 may process the information in the memory 204 to generate third information / signals, and then transmit a wireless signal including the third information / signals through the transceiver 206. The processor 202 may receive a wireless signal including fourth information / signals through the transceiver 106, and then store information obtained by processing the fourth information / signals in the memory 204. The memory 204 may be connected to the processor 202 and store various information related to the operation of the processor 202. For example, the memory 204 may store software code including instructions for executing some or all of the processes controlled by the processor 202 or for executing the descriptions, functions, processes, proposals, methods, and / or operational flowcharts disclosed in this document. The processor 202 and the memory 204 may be part of a communication modem / circuit / chip designed to implement a RAT (e.g., LTE or NR). The transceiver 206 may be connected to the processor 202 and transmit and / or receive wireless signals via one or more antennas 208. Each of the transceivers 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 be a communication modem / circuit / chip.

[0324] The hardware elements of the wireless devices 100 and 200 will now be described in more detail. One or more protocol layers may be implemented by, but are not limited to, one or more processors 102 and 202. For example, the one or more processors 102 and 202 may implement one or more layers (e.g., functional layers such as physical (PHY), medium access control (MAC), radio link control (RLC), packet data convergence protocol (PDCP), RRC, and service data adaptation protocol (SDAP)). The one or more processors 102 and 202 may generate one or more protocol data units (PDUs) and / or one or more service data units (SDUs) according to the descriptions, functions, processes, proposals, methods, and / or operational flow charts disclosed in this document. The one or more processors 102 and 202 may generate messages, control information, data, or information according to the descriptions, functions, processes, proposals, methods, and / or operational flow charts disclosed in this document and provide the messages, control information, data, or information to the one or more transceivers 106 and 206. The one or more processors 102 and 202 may generate a signal (e.g., a baseband signal) including a PDU, SDU, message, control information, data, or information according to the descriptions, functions, procedures, proposals, methods, and / or operational flow charts disclosed in this document and provide the generated signal to the one or more transceivers 106 and 206. The one or more processors 102 and 202 may receive a signal (e.g., a baseband signal) from the one or more transceivers 106 and 206 and obtain the PDU, SDU, message, control information, data, or information according to the descriptions, functions, procedures, proposals, methods, and / or operational flow charts disclosed in this document.

[0325] The one or more processors 102 and 202 may be referred to as controllers, microcontrollers, microprocessors, or microcomputers. The one or more processors 102 and 202 may be implemented using 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 the one or more processors 102 and 202. The descriptions, functions, processes, proposals, methods, and / or operational flowcharts disclosed in this document may be implemented using firmware or software, and the firmware or software may be configured to include modules, processes, or functions. The firmware or software configured to execute the descriptions, functions, processes, proposals, methods, and / or operational flowcharts disclosed in this document may be included in the one or more processors 102 and 202, or may be stored in one or more memories 104 and executed by the one or more processors 102 and 202. The descriptions, functions, processes, proposals, methods, and / or operational flowcharts disclosed in this document may be implemented using firmware or software in the form of code, instructions, and / or instruction sets.

[0326] Specifically, while the UE is sending CG-PUSCH based on Cat-4 LBT in NR-U, when DG-PUSCH is continuously scheduled without gaps in the timeline resources of the CG configured for the UE, and when the LBT subband of DG-PUSCH is equal to the LBT subband of CG-PUSCH or is a subset of the LBT subband of CG-PUSCH, the processor 102 according to an embodiment of the present disclosure can control the UE to continue sending DG-PUSCH after sending CG-PUSCH without LBT.

[0327] When there is a gap between the end symbol of the CG-PUSCH and the start symbol of the DG-PUSCH on the time axis, or the LBT subband resources of the CG-PUSCH that has been sent on the frequency axis are different from the LBT subband resources of the scheduled CG-PUSCH, that is, the LBT subband of the DG-PUSCH is not included in the LBT subband of the CG-PUSCH, the processor 102 can control the UE to drop specific X symbols, Y CG-PUSCHs or Z time slots immediately before the DG-PUSCH to ensure the LBT gap before sending the DG-PUSCH.

[0328] The processor 102 can control the UE to select one of a second ED threshold calculated based on the maximum UL power configured by the BS and a first ED threshold configured by the BS for UL to DL COT sharing, according to whether DL transmission other than PDCCH transmission of up to 2 symbols is allowed within the COT shared with the BS, and perform UL LBT and UL transmission based on the selected ED threshold.

[0329] In this case, the processor 102 can control the UE to notify the BS whether DL transmission other than PDCCH transmission of up to 2 symbols is allowed within the COT shared with the BS during COT sharing by sending information in the CG-UCI about which ED threshold of the first ED threshold and the second ED threshold (or UL power based on the selected threshold) has been used to perform LBT and UL transmission.

[0330] As another embodiment, the processor 202 according to an embodiment of the present disclosure may control the reception of a CG-PUSCH transmitted based on Cat-4 LBT from the UE in NR-U, continuously schedule the DG-PUSCH without gaps with the timeline resources for configuring the CG for the UE, and configure the LBT subband of the DG-PUSCH, which is equal to the LBT subband of the CG-PUSCH or a subset of the LBT subband of the CG-PUSCH. In this case, the processor 202 may control the continued reception of the DG-PUSCH after the UE transmits the CG-PUSCH without LBT.

[0331] The processor 202 may configure the CG-PUSCH and the DG-PUSCH so that there is a gap between the end symbol of the CG-PUSCH and the start symbol of the DG-PUSCH on the time axis, or the LBT subband resources of the CG-PUSCH that has been sent and the LBT subband resources of the scheduled CG-PUSCH on the frequency axis are different. In this case, in order to allow the UE to ensure the LBT gap before sending the DG-PUSCH, the processor 202 may control the reception of the CG-PUSCH except for a specific X symbols, Y CG-PUSCHs, or Z time slots immediately before the DG-PUSCH.

[0332] The processor 202 may control the maximum UL power required to configure a first ED threshold for COT sharing and calculate a second ED threshold for a case where the COT is not shared for the UE. When the UE selects one of the second ED threshold calculated based on the maximum UL power configured by the base station and the first ED threshold configured by the base station for UL-to-DL COT sharing and performs UL LBT and UL transmission based on the selected ED threshold, the processor 202 may control the UE to receive UL transmission depending on whether DL transmission other than PDCCH transmission of up to 2 symbols is allowed within the COT shared with the base station.

[0333] The processor 202 may control the CG-UCI to receive information about which ED threshold (or UL power based on the selected threshold) of the first ED threshold and the second ED threshold has been used for performing LBT and UL transmission. The processor 202 may identify whether DL transmission other than PDCCH transmission of up to 2 symbols is allowed within the COT shared with the UE based on the CG-UCI.

[0334] One or more memories 104 and 204 can be connected to one or more processors 102 and 202 and store various types of data, signals, messages, information, programs, codes, instructions and / or commands. One or more memories 104 and 204 can be configured to include read-only memory (ROM), random access memory (RAM), electrically erasable programmable read-only memory (EPROM), flash memory, hard drive, registers, cash memory, computer-readable storage media and / or combinations thereof. One or more memories 104 and 204 can be located inside and / or outside one or more processors 102 and 202. One or more memories 104 and 204 can be connected to one or more processors 102 and 202 via various technologies such as wired or wireless connections.

[0335] One or more transceivers 106 and 206 may transmit user data, control information, and / or wireless signals / channels described in the methods and / or operational flowcharts of this document to one or more other devices. One or more transceivers 106 and 206 may receive user data, control information, and / or wireless signals / channels described in the description, the descriptions, functions, processes, proposals, methods, and / or operational flowcharts disclosed in this document from one or more other devices. For example, one or more transceivers 106 and 206 may be connected to one or more processors 102 and 202 and transmit and receive wireless signals. For example, one or more processors 102 and 202 may control one or more transceivers 106 and 206 to transmit user data, control information, or wireless signals to one or more other devices. One or more processors 102 and 202 may control one or more transceivers 106 and 206 to receive user data, control information, or wireless signals from one or more other devices. One or more transceivers 106 and 206 can be connected to one or more antennas 108 and 208, and one or more transceivers 106 and 206 can be configured to transmit and receive user data, control information, and / or wireless signals / channels mentioned in the descriptions, functions, processes, and recommendations disclosed in this document through one or more antennas 108 and 208. In this document, one or more antennas can be multiple physical antennas or multiple logical antennas (e.g., antenna ports). One or more transceivers 106 and 206 can convert received wireless signals / channels, etc. from RF band signals to baseband signals so that the received user data, control information, and wireless signals / channels can be processed using one or more processors 102 and 202. One or more transceivers 106 and 206 can convert user data, control information, wireless signals / channels processed using one or more processors 102 and 202 from baseband signals to RF band signals. To this end, one or more transceivers 106 and 206 can include (analog) oscillators and / or filters.

[0336] Figure 18 FIGURE 1 illustrates another example of a wireless device applied to the present disclosure. The wireless device may be implemented in various forms according to usage / service (refer to FIGURE 2 ). Figure 18 ).

[0337] refer to Figure 18 , wireless devices 100 and 200 may correspond to Figure 18The wireless devices 100 and 200 may be configured to include various elements, components, units / portions, and / or modules. For example, each of the wireless devices 100 and 200 may include a communication unit 110, a control unit 120, a memory unit 130, and additional components 140. The communication unit 110 may include a communication circuit 112 and (one or more) transceivers 114. For example, the communication circuit 112 may include Figure 19 One or more processors 102 and 202 and / or one or more memories 104 and 204. For example, one or more transceivers 114 may include Figure 19 The control unit 120 is electrically connected to the communication unit 110, the memory unit 130, and the additional components 140, and provides overall control for the wireless device. For example, the control unit 120 can control the electrical / mechanical operation of the wireless device based on the program / code / instructions / information stored in the memory unit 130. The control unit 120 can transmit information stored in the memory unit 130 to the outside (e.g., other communication devices) via the communication unit 110 via a wireless / wired interface, or store information received from the outside (e.g., other communication devices) via the communication unit 110 via a wireless / wired interface in the memory unit 130.

[0338] The additional component 140 may be configured in various ways depending on the type of wireless device. For example, the additional component 140 may include at least one of a power supply unit / battery, an input / output (I / O) unit, a drive unit, and a computing unit. The wireless device may be configured as, but not limited to, a robot ( Figure 16 100a), vehicles ( Figure 16 100b-1 and 100b-2), XR devices ( Figure 16 100c), handheld devices ( Figure 16 100d), household appliances ( Figure 16 100e), IoT devices ( Figure 16 100f), digital broadcasting terminals, hologram equipment, public safety equipment, MTC equipment, medical equipment, fintech equipment (or financial equipment), security equipment, climate / environmental equipment, AI servers / equipment ( Figure 16 400), BS( Figure 16 200), network nodes, etc.

[0339] exist Figure 18In the wireless devices 100 and 200, all of the various elements, components, units / portions, and / or modules can be connected to each other through wired interfaces, or at least a part thereof can be wirelessly connected to each other through the communication unit 110. For example, in each of the wireless devices 100 and 200, the control unit 120 and the communication unit 110 can be connected by wire, and the control unit 120 and the first units (e.g., 130 and 140) can be wirelessly connected through the communication unit 110. Each element, component, unit / portion, and / or module in the wireless device 100 can further include one or more elements. For example, the control unit 120 can be configured with a set of one or more processors. For example, the control unit 120 can be configured with a set of one or more processors. For example, the control unit 120 can be configured with a set of a communication control processor, an application processor, an electronic control unit (ECU), a graphic processing unit, and a memory control processor. In another example, the storage unit 130 can be configured with a RAM, a dynamic RAM (DRAM), a ROM, a flash memory, a volatile memory, a non-volatile memory, and / or a combination thereof.

[0340] Figure 19 The vehicle or the autonomous driving vehicle applied to the present disclosure is illustrated. The vehicle or the autonomous driving vehicle can be implemented as a mobile robot, a car, a train, a manned / unmanned aerial vehicle (AV), a ship, etc.

[0341] Reference Figure 19 The vehicle or the autonomous driving vehicle 100 can include 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 an autonomous driving unit 140d. The antenna unit 108 can be configured as a part of the communication unit 110. The blocks 110 / 130 / 140a to 140d correspond to the blocks 110 / 130 / 140 of FIG. 1, respectively. Figure 18

[0342] ​The communication unit 110 can send and receive signals (e.g., data and control signals) to and from external devices such as other vehicles, base stations (e.g., gNBs and roadside units), and servers. The control unit 120 can perform various operations by controlling components of the vehicle or autonomous vehicle 100. The control unit 120 may include an ECU. The drive unit 140a can enable the vehicle or autonomous vehicle 100 to navigate a road. The drive unit 140a may include an engine, a motor, a powertrain, wheels, brakes, a steering system, and the like. The power supply unit 140b can supply power to the vehicle or autonomous vehicle 100 and may include wired / wireless charging circuits, a battery, and the like. The sensor unit 140c can acquire information regarding vehicle status, surrounding environment, user information, and the like. The sensor unit 140 c may include an inertial measurement unit (IMU) sensor, a collision sensor, a wheel sensor, a speed sensor, a slope sensor, a weight sensor, a heading sensor, a location module, a vehicle forward / backward sensor, a battery sensor, a fuel sensor, a tire sensor, a steering sensor, a temperature sensor, a humidity sensor, an ultrasonic sensor, an illumination sensor, a pedal position sensor, etc. The autonomous driving unit 140 d may implement a technology for maintaining a lane in which the vehicle is driving, a technology for automatically adjusting a speed such as adaptive cruise control, a technology for autonomously driving along a determined path, a technology for driving by automatically setting a path if a destination is set, etc.

[0343] For example, the communication unit 110 can receive map data, traffic information data, and the like from an external server. The autonomous driving unit 140d can generate an autonomous driving route and driving plan based on the obtained data. The control unit 120 can control the drive unit 140a so that the vehicle or autonomous driving vehicle 100 moves along the autonomous driving route according to the driving plan (e.g., speed / direction control). During autonomous driving, the communication unit 110 can periodically obtain recent traffic information data from the external server and can obtain surrounding traffic information data from neighboring vehicles. During autonomous driving, the sensor unit 140c can obtain information regarding vehicle status and / or surrounding environment information. The autonomous driving unit 140d can update the autonomous driving route and driving plan based on the newly obtained data / information. The communication unit 110 can transmit information regarding the vehicle's location, autonomous driving route, and / or driving plan to the external server. The external server can use AI technology, etc., based on the information collected from the vehicle or autonomous driving vehicle to predict traffic information data and provide the predicted traffic information data to the vehicle or autonomous driving vehicle.

[0344] The embodiments of the present disclosure described herein below are combinations of elements and features of the present disclosure. Unless otherwise stated, these elements or features may be considered as optional. Each element or feature may be practiced without being combined with other elements or features. In addition, the embodiments of the present disclosure may be constructed by combining a portion of the elements and / or features. The order of operations described in the embodiments of the present disclosure may be rearranged. Some configurations of any one embodiment may be included in another embodiment and may be replaced by the corresponding configurations of another embodiment. It will be apparent to those skilled in the art that claims that are not explicitly referenced to each other in the appended claims may be presented in combination as embodiments of the present disclosure, or may be included as new claims by subsequent amendments after filing an application.

[0345] In the present disclosure, in some cases, specific operations described as being performed by a base station (BS) may be performed by an upper node of the BS. That is, it is apparent that in a network consisting of multiple network nodes including a BS, various operations performed for communication with an MS may be performed by the BS or network nodes other than the BS. The term "BS" may be replaced with terms such as "fixed station," "Node B," "enhanced Node B (eNodeB or eNB)," and "access point."

[0346] Those skilled in the art will understand that the present disclosure may be implemented in other specific ways than those set forth herein without departing from the spirit and essential characteristics of the present disclosure. Therefore, the above embodiments are to be construed in all respects as illustrative and not restrictive. The scope of the present disclosure is to be determined by the appended claims and their legal equivalents, not by the above description, and all changes coming within the meaning and equivalent range of the appended claims are intended to be included therein.

[0347] Industrial Applicability

[0348] Although the above-mentioned method of transmitting and receiving a UL channel in a wireless communication system and the apparatus thereof have been described based on an example applied to a 5G NR system, the method and apparatus may be applied to various wireless communication systems in addition to the 5G NR system.

Claims

1. A method for transmitting a physical uplink shared channel (PUSCH) by a user equipment (UE) in a wireless communication system, the method comprising: receiving an uplink grant for scheduling a dynamic grant (DG)-PUSCH; Sending configured grant (CG)-PUSCH; and Sending the DG-PUSCH based on the UL grant, wherein, based on the first frequency resource used for the DG-PUSCH being a subset of the second frequency resource used for the CG-PUSCH, the DG-PUSCH is transmitted without a gap after the CG-PUSCH is transmitted; and Wherein, based on the fact that the first frequency resource is not a subset of the second frequency resource, the transmission on the last CG-PUSCH symbol before the DG-PUSCH is discarded.

2. The method according to claim 1, in, Sending the CG-PUSCH includes: performing a listen-before-talk (LBT) operation for transmitting the CG-PUSCH, and transmitting the CG-PUSCH based on a result of performing the LBT operation, and The sending of the DG-PUSCH includes: Based on the first frequency resource being a subset of the second frequency resource, transmitting the DG-PUSCH without performing the LBT operation, and Based on the fact that the first frequency resources are not a subset of the second frequency resources, the DG-PUSCH is sent while performing the LBT operation.

3. The method according to claim 1, wherein The start symbol of the DG-PUSCH and the end symbol of the CG-PUSCH are continuous on the time axis.

4. The method according to claim 1, wherein The transmission of the DG-PUSCH is scheduled after the transmission of the CG-PUSCH.

5. An apparatus for transmitting a physical uplink shared channel (PUSCH) in a wireless communication system, the apparatus comprising: at least one processor; and At least one computer memory operatively connected to the at least one processor and storing instructions that, when executed, cause the at least one processor to perform operations comprising: receiving an uplink grant for scheduling a dynamic grant (DG)-PUSCH; Sending configured grant (CG)-PUSCH; and transmitting the DG-PUSCH based on the UL grant, and wherein, based on the first frequency resource used for the DG-PUSCH being a subset of the second frequency resource used for the CG-PUSCH, the DG-PUSCH is transmitted without a gap after the CG-PUSCH is transmitted; and Wherein, based on the fact that the first frequency resource is not a subset of the second frequency resource, the transmission on the last CG-PUSCH symbol before the DG-PUSCH is discarded.

6. The device according to claim 5, in, Sending the CG-PUSCH includes: performing a listen-before-talk (LBT) operation for transmitting the CG-PUSCH, and transmitting the CG-PUSCH based on a result of performing the LBT operation, and The sending of the DG-PUSCH includes: Based on the first frequency resource being a subset of the second frequency resource, transmitting the DG-PUSCH without performing the LBT operation, and Based on the fact that the first frequency resources are not a subset of the second frequency resources, the DG-PUSCH is sent while performing the LBT operation.

7. The device according to claim 5, wherein The start symbol of the DG-PUSCH and the end symbol of the CG-PUSCH are continuous on the time axis.

8. The device according to claim 5, wherein The transmission of the DG-PUSCH is scheduled after the transmission of the CG-PUSCH.

9. A computer-readable storage medium storing at least one computer program, the computer program comprising instructions that, when executed by at least one processor, cause the at least one processor to perform operations comprising: receiving an uplink grant for scheduling a dynamic grant (DG)-PUSCH; Sending configured grant (CG)-PUSCH; and Sending the DG-PUSCH based on the UL grant, wherein, based on the first frequency resource used for the DG-PUSCH being a subset of the second frequency resource used for the CG-PUSCH, the DG-PUSCH is transmitted without a gap after the CG-PUSCH is transmitted; and Wherein, based on the fact that the first frequency resource is not a subset of the second frequency resource, the transmission on the last CG-PUSCH symbol before the DG-PUSCH is discarded.

10. A user equipment (UE) for transmitting a physical uplink shared channel (PUSCH) in a wireless communication system, the UE comprising: at least one transceiver; at least one processor; as well as At least one computer memory operatively connected to the at least one processor and storing instructions that, when executed, cause the at least one processor to perform operations comprising: receiving, by the at least one transceiver, an uplink grant for scheduling a dynamic grant (DG)-PUSCH; transmitting, by the at least one transceiver, a configured grant (CG)-PUSCH; and transmitting the DG-PUSCH based on the UL grant through the at least one transceiver, and wherein, based on the first frequency resource used for the DG-PUSCH being a subset of the second frequency resource used for the CG-PUSCH, the DG-PUSCH is transmitted without a gap after the CG-PUSCH is transmitted; and Wherein, based on the fact that the first frequency resource is not a subset of the second frequency resource, the transmission on the last CG-PUSCH symbol before the DG-PUSCH is discarded.

11. A method for receiving a physical uplink shared channel (PUSCH) by a base station (BS) in a wireless communication system, the method comprising: Sending an uplink grant for scheduling dynamic grant (DG)-PUSCH; Receive configured grant (CG)-PUSCH; as well as receiving the DG-PUSCH based on the UL grant, wherein, based on the first frequency resource used for the DG-PUSCH being a subset of the second frequency resource used for the CG-PUSCH, the DG-PUSCH is received without a gap after the CG-PUSCH is transmitted, and Wherein, based on the fact that the first frequency resource is not a subset of the second frequency resource, the transmission on the last CG-PUSCH symbol before the DG-PUSCH is discarded.

12. A base station (BS) for receiving a physical uplink shared channel (PUSCH) in a wireless communication system, the BS comprising: at least one transceiver; at least one processor; as well as At least one computer memory operatively connected to the at least one processor and storing instructions that, when executed, cause the at least one processor to perform operations comprising: transmitting, by the at least one transceiver, an uplink grant for scheduling a dynamic grant (DG)-PUSCH; receiving, by the at least one transceiver, a configured grant (CG)-PUSCH; and receiving, by the at least one transceiver, the DG-PUSCH based on the UL grant, and wherein, based on the first frequency resource used for the DG-PUSCH being a subset of the second frequency resource used for the CG-PUSCH, the DG-PUSCH is received without a gap after the CG-PUSCH is transmitted, and Wherein, based on the fact that the first frequency resource is not a subset of the second frequency resource, the transmission on the last CG-PUSCH symbol before the DG-PUSCH is discarded.

Images