Transmission power control method for simultaneous transmission across multiple panels in wireless communication system and apparatus therefor

Abstract

The present disclosure relates to a method performed by a user equipment (UE) in a wireless communication system. Specifically, the method comprises the steps of: determining a first transmission power of a first uplink channel and a second transmission power of a second uplink channel; and transmitting a first uplink channel to a base station (BS) using a first transmission power based on the first uplink grant, and transmitting a second uplink channel to the BS using a second transmission power based on the second uplink grant, in which, in a case where the first uplink channel and the second uplink channel are simultaneously transmitted to the BS, the first transmission power is greater than the second transmission power. One of the first transmission power and the second transmission power is selected based on a first control resource set (CORESET) index associated with the first uplink grant and a second CORESET index associated with the second uplink grant, and the selected one transmission power is reduced such that a sum of the first transmission power and the second transmission power conforms to a maximum transmission power of the UE.

Description

Technical Field

[0001] The present disclosure relates to a wireless communication system, and more particularly, to a transmission power control method and device for simultaneous transmission across multiple panels (STxMP) in a wireless communication system. Background Art

[0002] Wireless communication systems are widely deployed to provide various types of communication services such as voice and data. Generally, wireless communication systems are multiple access systems that can support communication with multiple users by sharing available system resources (bandwidth, transmission power, etc.). Examples of multiple access systems include code division multiple access (CDMA) systems, frequency division multiple access (FDMA) systems, time division multiple access (TDMA) systems, orthogonal frequency division multiple access (OFDMA) systems, and single carrier frequency division multiple access (SC-FDMA) systems. Summary of the invention

[0003] Technical issues

[0004] Hereinafter, a transmission power control method and apparatus thereof for simultaneous transmission across multiple panels (STxMP) in a wireless communication system will be described based on the above discussion.

[0005] Those skilled in the art to which the embodiments pertain will understand that the objects that can be achieved using the embodiments are not limited to those specifically described above, and the above and other objects will be more clearly understood from the following detailed description.

[0006] Technical Solution

[0007] In one aspect of the present disclosure, a method is provided herein for execution by a user equipment (UE) in a wireless communication system. The method includes the following steps: determining a first transmission power of a first uplink channel; determining a second transmission power of a second uplink channel; sending the first uplink channel to a base station (BS) at the first transmission power based on a first uplink grant; and sending the second uplink channel to the BS at the second transmission power based on a second uplink grant. The method includes the following steps: based on simultaneous transmission of the first uplink channel and the second uplink channel to the BS, selecting a transmission power from a first transmission power and a second transmission power based on a first control resource set (CORESET) index related to the first uplink grant and a second CORESET index related to the second uplink grant; and reducing the selected transmission power so that the sum of the first transmission power and the second transmission power meets the maximum transmission power of the UE.

[0008] In another aspect of the present disclosure, a UE is provided herein. The UE includes: at least one transceiver; at least one processor; and at least one computer memory, which is operatively connected to the at least one processor and stores instructions, which, when executed, cause the at least one processor to perform operations. The operations include: determining a first transmission power of a first uplink channel; determining a second transmission power of a second uplink channel; sending the first uplink channel to the BS at the first transmission power based on a first uplink grant; and sending the second uplink channel to the BS at the second transmission power based on a second uplink grant. The operations include: based on simultaneous transmission of the first uplink channel and the second uplink channel to the BS, selecting a transmission power from a first transmission power and a second transmission power based on a first CORESET index related to the first uplink grant and a second CORESET index related to the second uplink grant; and reducing the selected transmission power so that the sum of the first transmission power and the second transmission power meets the maximum transmission power of the UE.

[0009] In another aspect of the present disclosure, a processing device in a wireless communication system is provided herein. The processing device includes: at least one processor; and at least one computer memory, which is operatively connected to the at least one processor and stores instructions, which, when executed, cause the at least one processor to perform operations for a UE. The operations include: determining a first transmission power of a first uplink channel; determining a second transmission power of a second uplink channel; sending the first uplink channel to the BS at the first transmission power based on a first uplink grant; and sending the second uplink channel to the BS at the second transmission power based on a second uplink grant. The operations include: based on simultaneous transmission of the first uplink channel and the second uplink channel to the BS, selecting a transmission power from the first transmission power and the second transmission power based on a first CORESET index related to the first uplink grant and a second CORESET index related to the second uplink grant; and reducing the selected transmission power so that the sum of the first transmission power and the second transmission power meets the maximum transmission power of the UE.

[0010] In another aspect of the present disclosure, a computer-readable storage medium is provided herein. The computer-readable storage medium stores at least one computer program including instructions, which, when executed by at least one processor, causes the at least one processor to perform operations for a UE. The operations include: determining a first transmission power of a first uplink channel; determining a second transmission power of a second uplink channel; sending the first uplink channel to the BS at the first transmission power based on a first uplink grant; and sending the second uplink channel to the BS at the second transmission power based on a second uplink grant. The operations include: based on simultaneous transmission of the first uplink channel and the second uplink channel to the BS, selecting a transmission power from the first transmission power and the second transmission power based on a first CORESET index related to the first uplink grant and a second CORESET index related to the second uplink grant; and reducing the selected transmission power so that the sum of the first transmission power and the second transmission power meets the maximum transmission power of the UE.

[0011] In various aspects of the present disclosure, when at least one of the first uplink grant and the second uplink grant is a Type 1 configuration grant (CG), a sounding reference signal (SRS) resource index related to the corresponding uplink grant is considered to be a CORESET index related to the corresponding uplink grant.

[0012] In various aspects of the present disclosure, when at least one of the first uplink grant and the second uplink grant is a Type 2CG, a CORESET index related to the Type 2CG is an index of a CORESET that receives downlink control information including an activation indicator of the Type 2CG.

[0013] In various aspects of the present disclosure, a transmission power of an uplink channel to be transmitted based on an uplink grant related to a higher CORESET index between the first CORESET index and the second CORESET index is selected among the first transmission power and the second transmission power.

[0014] In various aspects of the present disclosure, when the selected transmission power is reduced to the minimum transmission power, it is preferred that other transmission powers are reduced.

[0015] The above solutions are only some examples of the present disclosure, and those skilled in the art may derive and understand various examples reflecting the technical features of the present disclosure from the following detailed description.

[0016] Beneficial Effects

[0017] According to the present disclosure, wireless signal transmission and reception can be efficiently performed in a wireless communication system.

[0018] Those skilled in the art will understand that the technical effects that can be achieved using the present disclosure are not limited to those specifically described above, and the above and other technical effects that can be achieved by the present disclosure will be more clearly understood from the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings are provided to help understand the embodiments and the detailed description. However, the technical features of the embodiments are not limited to specific drawings, and the features disclosed in the various drawings can be combined with each other to form new embodiments. The reference numerals in the various drawings represent structural elements:

[0020] Figure 1 Physical channels used in a 3rd Generation Partnership Project (3GPP) system as an example of a wireless communication system and a general signal transmission method using the same are shown.

[0021] Figure 2 Shows the radio frame structure.

[0022] Figure 3 A resource grid showing time slots.

[0023] Figure 4 An exemplary mapping of physical channels in time slots is shown.

[0024] Figure 5 An exemplary process of transmitting a physical downlink shared channel (PDSCH) and acknowledgement / negative acknowledgement (ACK / NACK) is shown.

[0025] Figure 6 An exemplary physical uplink shared channel (PUSCH) transmission process is shown.

[0026] Figure 7 An exemplary process for uplink transmission power control is shown.

[0027] Figure 8 is a flow chart illustrating a power control method when a user equipment (UE) performs simultaneous transmission across multiple panels (STxMP) according to the present disclosure.

[0028] Figures 9 to 12 A communication system (1) and a wireless device suitable for use with the present disclosure are shown. DETAILED DESCRIPTION

[0029] The techniques described herein can be used for 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. CDMA can be implemented as a radio technology such as Universal Terrestrial Radio Access (UTRA) or CDMA2000. TDMA can be implemented as a radio technology such as Global System for Mobile Communications (GSM) / General Packet Radio Service (GPRS) / Enhanced Data Rate for GSM Evolution (EDGE). OFDMA can be implemented as a radio technology such as IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE802.20, Evolved UTRA (E-UTRA), etc. UTRA is part of Universal Mobile Telecommunications System (UMTS). 3GPP LTE is part of Evolved UMTS (E-UMTS) using E-UTRA. 3GPP LTE uses OFDMA for downlink and SC-FDMA for uplink. LTE-A is the evolution of 3GPP LTE. 3GPP NR (New Radio or New Radio Access Technology) is an evolved version of 3GPP LTE / LTE-A / LTE-A pro.

[0030] As more and more communication devices require greater communication capacity to send and receive signals, there is a need for improved mobile broadband communications relative to traditional radio access technologies. Therefore, communication systems that take into account services / UEs that are sensitive to reliability and latency are being discussed. Next generation radio access technologies that take into account enhanced mobile broadband communications, massive machine type communications (MTC), and ultra-reliable low latency communications (URLLC) may be referred to as new radio access technologies (RATs) or new radios (NRs).

[0031] Although the present disclosure is mainly described in the context of 3GPP NR for clarity of description, the technical concept of the present disclosure is not limited to 3GPP NR.

[0032] In this specification, the expression "setting" may be replaced by the expression "configuration", and the two may be used interchangeably. In addition, conditional expressions (e.g., "if ~~", "in the case of ~~", "when ~~", etc.) may be replaced by expressions "based on ~~" or "in the state of ~~". In addition, the operation or SW / HW configuration of the user equipment (UE) / base station (BS) may be inferred / understood based on the satisfaction of the conditions. In addition, when the processing of the receiving (or transmitting) side can be inferred / understood from the processing of the transmitting (or receiving) side in the signal transmission / reception between wireless communication devices (e.g., BS and UE), its description may be omitted. For example, signal determination / generation / encoding / transmission on the transmitting side may be understood as signal monitoring reception / decoding / determination on the receiving side. In addition, when it is said that the UE performs (or does not perform) a specific operation, this may also be interpreted as meaning that the BS expects / assumes that the UE performs the specific operation (or expects / assumes that the UE does not perform the specific operation) to operate. In addition, when it is said that the BS performs (or does not perform) a specific operation, this can also be interpreted as meaning that the UE expects / assumes that the BS performs the specific operation (or expects / assumes that the BS does not perform the specific operation) to operate. In addition, the identification and indexing of the various sections, implementation methods, examples, options, methods, schemes, etc. in the following description are for convenience of description and should not be interpreted as meaning that each forms an independent disclosure or that each should be implemented separately. In addition, unless there is an explicit conflicting / contrary description when describing the various sections, implementation methods, examples, options, methods, schemes, etc., it can be inferred / interpreted to mean that at least some of them can be implemented in combination together, or they can be implemented by omitting at least some of them.

[0033] In a wireless communication system, a UE receives information from a BS through a downlink (DL) and transmits information to the BS through an uplink (UL). The information transmitted and received by the BS and the UE includes data and various control information, and includes various physical channels according to the type / purpose of the information transmitted and received by the UE and the BS.

[0034] Figure 1 The diagram shows physical channels in a 3GPP NR system and a signal transmission method using the physical channels.

[0035] When the UE is powered on or when the UE initially enters a cell, in step S101, the UE performs an initial cell search involving synchronization with the BS. For the initial cell search, the UE receives a synchronization signal block (SSB). The SSB includes a primary synchronization signal (PSS), a secondary synchronization signal (SSS), and a physical broadcast channel (PBCH). The UE synchronizes with the BS based on the PSS / SSS and acquires information such as a cell identifier (ID). The UE can then receive broadcast information from the cell on the PBCH. At the same time, the UE can check the downlink channel status by receiving a downlink reference signal (DL RS) during the initial cell search.

[0036] After the initial cell search, the UE may acquire more specific system information by receiving a physical downlink control channel (PDCCH) and receiving a physical downlink shared channel (PDSCH) based on information of the PDCCH in step S102.

[0037] Subsequently, in order to complete the connection with the eNB, the UE may perform a random access procedure with the eNB (S103 to S106). In the random access procedure, the UE may send a preamble on a physical random access channel (PRACH) (S103) and may receive a random access response (RAR) to the preamble on a PDSCH associated with the PDCCH (S104). The UE may use the scheduling information in the RAR to send a physical uplink shared channel (PUSCH) (S105) and perform a contention resolution procedure, including receiving a PDCCH signal and a PDSCH signal corresponding to the PDCCH signal (S106).

[0038] After the above process, the UE may receive PDCCH and / or PDSCH from the eNB (S107) and send a physical uplink shared channel (PUSCH) and / or a physical uplink control channel (PUCCH) to the eNB (S108), which is a general DL and UL signal transmission process. In particular, the UE receives downlink control information (DCI) on the PDCCH. The control information sent from the UE to the eNB is collectively referred to as uplink control information (UCI). UCI includes hybrid automatic repeat and request confirmation / negative determination (HARQ-ACK / NACK), scheduling request (SR), channel state information (CSI), etc. CSI includes channel quality indicator (CQI), precoding matrix indicator (PMI), rank indication (RI), etc. Although UCI is usually sent through PUCCH, it can be sent through PUSCH when control information and service data should be sent simultaneously. In addition, UCI can be sent aperiodically through PUSCH according to the request / instruction of the network.

[0039] Figure 2The structure of the radio frame is shown. The radio frame can be used for UL transmission and DL transmission in NR. The length of the radio frame is 10ms and can be defined by two 5ms half frames. HF may include five 1ms subframes. The subframe may be divided into one or more time slots, and the number of time slots in the SF may be determined according to the subcarrier spacing (SCS). Depending on the cyclic prefix (CP), each time slot may include 12 or 14 OFDM (A) symbols. In the case of normal CP (NCP), each time slot may include 14 symbols, and in the case of extended CP (ECP), each time slot may include 12 symbols. In this article, the symbol may be an OFDM symbol (or CP-OFDM symbol) or an SC-FDMA symbol (or DFT-s-OFDM symbol).

[0040] Table 1 below lists the number of symbols N per time slot according to SCS configuration μ in the case of NCP slot symb , the number of time slots per frame N frame,u slot and the number of time slots per subframe N subframe,u slot .

[0041] [Table 1]

[0042] <![CDATA[SCS(15*2 ∧ in)]]> <![CDATA[N slot symb ]]> <![CDATA[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

[0043] Table 2 below lists the number of symbols N per time slot according to the SCS configuration μ in the case of ECP slot symb , the number of time slots per frame N frame,u slot and the number of time slots per subframe N subframe,u slot .

[0044] [Table 2]

[0045] <![CDATA[SCS(15*2 ∧ in)]]> <![CDATA[N slot symb ]]> <![CDATA[N frame,u slot ]]> <![CDATA[N subframe,u slot ]]> 60KHz(u=2) 12 40 4

[0046] The structure of the frame is only an example. The number of subframes, the number of time slots, and the number of symbols in a frame may vary.

[0047] In the NR system, OFDM parameter sets (e.g., SCS) may be configured differently for multiple cells aggregated for one UE. Therefore, the (absolute time) duration of a time resource (e.g., SF, time slot, or TTI) (referred to as a time unit (TU) for simplicity) consisting of the same number of symbols may be configured differently between aggregated cells. Here, the symbol may include an OFDM symbol (or CP-OFDM symbol) and an SC-FDMA symbol (or a discrete Fourier transform-spread-OFDM (DFT-s-OFDM) symbol).

[0048] Figure 3 An exemplary resource grid showing the duration of a time slot. A time slot includes multiple symbols in the time domain. For example, in the case of a normal CP, a time slot includes 14 symbols, and in the case of an extended CP, a time slot includes 12 symbols. A carrier includes multiple subcarriers in the frequency domain. A resource block (RB) is defined as a plurality of (e.g., 12) consecutive subcarriers in the frequency domain. A bandwidth part (BWP) may be defined as a plurality of physical RBs (PRBs) in the frequency domain and corresponds to a parameter set (e.g., SCS, CP length, etc.). A carrier may include up to N (e.g., five) BWPs. Data communication may be performed in an active BWP, and only one BWP may be enabled for a UE. Each element of a resource grid may be referred to as a resource element (RE) and mapped to a complex symbol.

[0049] Figure 4 An example of mapping physical channels in a time slot is shown. PDCCH may be sent in the DL control region, and PDSCH may be sent in the DL data region. PUCCH may be sent in the UL control region, and PUSCH may be sent in the UL data region. GP provides a time gap for switching from a transmit mode to a receive mode or from a receive mode to a transmit mode at the BS and UE. Some symbols within a subframe at a DL to UL switching time point may be configured as GP.

[0050] The individual physical channels are described in more detail below.

[0051] PDCCH transmits DCI. For example, PDCCH (i.e., DCI) may carry information about the transmission 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 high-level control messages (e.g., RAR sent on PDSCH), transmit power control commands, information about the activation / release of the configured scheduling, etc. DCI includes a cyclic redundancy check (CRC). The CRC is masked using various identifiers (IDs) (e.g., radio network temporary identifier (RNTI)) according to the owner or purpose of the PDCCH. For example, if the PDCCH is used 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 for system information (eg, system information block (SIB)), the CRC is masked by a system information RNTI (SI-RNTI). When the PDCCH is for RAR, the CRC is masked by a random access-RNTI (RA-RNTI).

[0052] The PDCCH includes 1, 2, 4, 8 or 16 control channel elements (CCEs) depending on the aggregation level (AL). CCE is a logical allocation unit for providing a specific code rate to the PDCCH according to the radio channel state. CCE includes 6 resource element groups (REGs). REG is defined as one OFDM symbol and one (P)RB. The PDCCH is transmitted in a control resource set (CORESET). CORESET is defined as a set of REGs with a given parameter set (e.g., SCS, CP length, etc.). Multiple CORESETs for one UE may overlap with each other in the time / frequency domain. CORESET may be configured by system information (e.g., master information block (MIB)) or UE-specific high-level (e.g., radio resource control (RRC) layer) signaling. Specifically, the number of RBs and the number of OFDM symbols (up to 3) included in the CORESET may be configured by high-level signaling.

[0053] For PDCCH reception / detection, the UE monitors PDCCH candidates. PDCCH candidates represent CCEs that the UE should monitor for PDCCH detection. Each PDCCH candidate is defined as 1, 2, 4, 8 or 16 CCEs according to AL. Monitoring includes (blind) decoding of PDCCH candidates. The set of PDCCH candidates monitored by the UE is defined as a PDCCH search space (SS). The SS includes a common search space (CSS) or a UE-specific search space (USS). The UE can acquire DCI by monitoring PDCCH candidates in one or more SSs configured by MIB or high-level signaling. Each CORESET is associated with one or more SSs, and each SS is associated with a COREST. SS can be defined based on the following parameters.

[0054] -controlResourceSetId: indicates the CORESET associated with the SS

[0055] -monitoringSlotPeriodicityAndOffset: indicates PDCCH monitoring periodicity (time slot) and PDCCH monitoring period offset (time slot)

[0056] -monitoringSymbolsWithinSlot: indicates the PDCCH monitoring symbols within the slot (e.g., the first symbol of CORESET)

[0057] -nrofCandidates: AL = {1,2,4,8,16} indicates the number of PDCCH candidates (one of 0, 1, 2, 3, 4, 5, 6 and 8)

[0058] * A timing (eg, time / frequency resource) at which a PDCCH candidate is to be monitored is defined as a PDCCH (monitoring) timing. One or more PDCCH (monitoring) timings may be configured within a slot.

[0059] Table 3 shows the characteristics of each SS type.

[0060] [Table 3]

[0061]

[0062] Table 4 shows the DCI format transmitted on the PDCCH.

[0063] [Table 4]

[0064]

[0065] 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)-based (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-based (or CBG-level) PDSCH (or 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 transmit dynamic time slot format information (e.g., dynamic SFI) to the UE, and DCI format 2_1 can be used to transmit DL preemption information to the UE. DCI format 2_0 and / or DCI format 2_1 can be sent to UEs in the group via a group common PDCCH (a PDCCH transmitted to UEs defined as a group).

[0066] DCI format 0_0 and DCI format 1_0 may be referred to as fallback DCI formats, while DCI format 0_1 ​​and DCI format 1_1 may be referred to as non-fallback DCI formats. Under the fallback DCI format, the DCI size / field configuration remains the same regardless of the UE configuration. In contrast, under the non-fallback DCI format, the DCI size / field configuration varies according to the UE configuration.

[0067] The PDSCH carries DL data (e.g., DL-SCH transport block (DL-SCH TB)), and modulation schemes such as quadrature phase shift keying (QPSK), 16 quadrature amplitude modulation (16QAM), 64QAM, 256QAM, etc. are applied to the PDSCH. The TB is encoded to generate a codeword. The PDSCH can carry up to two codewords. Each codeword can be subjected to scrambling and modulation mapping, and the modulation symbol generated from the codeword can be mapped to one or more layers. Each layer is mapped to a resource together with a demodulation reference signal (DMRS), generated as an OFDM symbol signal and sent through a corresponding antenna port.

[0068] PUCCH carries UCI. UCI includes the following information.

[0069] -SR (Scheduling Request): Information used to request UL-SCH resources

[0070] -HARQ (Hybrid Automatic Repeat Request)-ACK (Acknowledgement): A response to a DL data packet (e.g., codeword) on the PDSCH. This indicates whether the DL data packet was successfully received. One HARQ-ACK bit may be sent in response to a single codeword, and two HARQ-ACK bits may be sent in response to two codewords. The HARQ-ACK response includes a positive ACK (abbreviated as ACK), a negative ACK (NACK), DTX, or NACK / DTX. HARQ-ACK may be used interchangeably with HARQ ACK / NACK and ACK / NACK.

[0071] -CSI (Channel State Information): Feedback information of DL channels. Multiple Input Multiple Output (MIMO) related feedback information includes RI and PMI.

[0072] Table 5 shows an exemplary PUCCH format. Based on PUCCH transmission duration, the PUCCH format may be divided into short PUCCH (formats 0 and 2) and long PUCCH (formats 1, 3, and 4).

[0073] [Table 5]

[0074]

[0075] PUCCH format 0 carries up to 2 bits of UCI and is mapped and sent based on a sequence. Specifically, the UE sends one of multiple sequences through the PUCCH of PUCCH format 0 to send specific UCI to the BS. Only when a positive SR is sent, the UE sends the PUCCH of PUCCH format 0 in the PUCCH resources configured for the corresponding SR.

[0076] PUCCH format 1 carries up to 2 bits of UCI, and modulation symbols are spread in the time domain with an orthogonal cover code (OCC) (configured differently depending on whether frequency hopping is performed). DMRS is transmitted in symbols that do not carry modulation symbols (ie, transmitted in time division multiplexing (TDM)).

[0077] PUCCH format 2 carries more than 2 bits of UCI, and the modulation symbols are sent with frequency division multiplexing (FDM) using DMRS. DMRS are located in symbol indexes #1, #4, #7, and #10 within a given RB at a density of 1 / 3. Pseudo-noise (PN) sequences are used for DMRS sequences. For 2-symbol PUCCH format 2, frequency hopping can be enabled.

[0078] In PUCCH format 3, UEs do not multiplex within the same PRBS and transmit UCI of more than 2 bits. In other words, PUCCH resources of PUCCH format 3 do not include OCC. Modulation symbols are transmitted in TDM using DMRS.

[0079] PUCCH format 4 supports multiplexing of up to 4 UEs in the same physical RS and carries more than 2 bits of UCI. In other words, the PUCCH resource of PUCCH format 3 includes OCC. The modulation symbols are transmitted in TDM using DMRS.

[0080] At least one of the one or more cells configured to the UE may be configured for PUCCH transmission. At least the primary cell may be configured as a cell for PUCCH transmission. Based on at least one cell configured for PUCCH transmission, at least one PUCCH cell group may be configured for the UE, and each PUCCH cell group includes one or more cells. The PUCCH cell group may be referred to as a PUCCH group for short. PUCCH transmission may be configured not only for the primary cell but also for the Scell, and the primary cell belongs to the primary PUCCH group, while the PUCCH-SCell configured for PUCCH transmission belongs to the secondary PUCCH group. The PUCCH on the primary cell may be used for cells belonging to the primary PUCCH group, and the PUCCH on the PUCCH-SCell may be used for cells belonging to the secondary PUCCH group.

[0081] The PUSCH carries UL data (e.g., UL-SCH TB) and / or UCI, and is transmitted based on a cyclic prefix-orthogonal frequency division multiplexing (CP-OFDM) waveform or a discrete Fourier transform-spread-orthogonal frequency division multiplexing (DFT-s-OFDM) waveform. When the PUSCH is transmitted based on the DFT-s-OFDM waveform, the UE transmits the PUSCH by applying transform precoding. For example, when transform precoding is not possible (e.g., transform precoding is disabled), the UE may transmit the PUSCH based on the CP-OFDM waveform, and when transform precoding is possible (e.g., transform precoding is enabled), the UE may transmit the PUSCH based on the CP-OFDM waveform or the DFT-s-OFDM waveform. PUSCH transmission may be dynamically scheduled by a UL grant in the DCI, or semi-statically scheduled based on higher layer (e.g., RRC) signaling (and / or layer 1 (L1) signaling (e.g., PDCCH)). PUSCH transmission may be performed in a codebook-based or non-codebook-based manner.

[0082] Figure 5 ACK / NACK transmission processing is shown. Figure 5 , the UE may detect the PDCCH in slot #n. The PDCCH includes DL scheduling information (e.g., DCI format 1_0 or DCI format 1_1). The PDCCH indicates DL assignment with PDSCH offset K0 and PDSCH with HARQ-ACK report offset K1. For example, DCI format 1_0 or DCI format 1_1 may include the following information.

[0083] - Frequency domain resource assignment: indicates the RB set assigned to PDSCH.

[0084] - Time domain resource assignment: Indicates K0 (e.g., slot offset), the starting position of the PDSCH in slot #n+K0 (e.g., OFDM symbol index), and the length of the PDSCH (e.g., number of OFDM symbols)

[0085] -PDSCH-to-HARQ_feedback timing indicator: indicates K1.

[0086] -HARQ process number (4 bits): indicates the HARQ process identification (ID) of data (eg, PDSCH or TB).

[0087] -PUCCH resource indicator (PRI): indicates the PUCCH resource to be used for UCI transmission among multiple PUCCH resources in a PUCCH resource set

[0088] Subsequently, the UE may receive the PDSCH from time slot #(n+K0) according to the scheduling information in time slot #n. Upon completion of PDSCH reception in time slot #n1 (where n+K0≤n1), the UE may send UCI via PUCCH in time slot #(n1+K1). The UCI may include a HARQ-ACK response to the PDSCH. Figure 5 In the example, it is assumed for convenience that the SCS of the PDSCH and the SCS of the PUCCH are the same and slot #n1=slot #n+K0, but the present disclosure is not limited thereto. When the SCSs are different, K1 may be indicated / interpreted based on the SCS of the PUCCH.

[0089] When the PDSCH is configured to send at most one TB, the HARQ-ACK response may include one bit. When the PDSCH is configured to send at most two TBs, the HARQ-ACK response may include two bits if spatial bundling is not configured and one bit if spatial bundling is configured. When the HARQ-ACK transmission time for multiple PDSCHs is specified as time slot #(n+K1), the UCI sent in time slot #(n+K1) includes HARQ-ACK responses for multiple PDSCHs.

[0090] Whether the UE should perform spatial bundling for the HARQ-ACK response may be configured for each cell group (e.g., via RRC / high-layer signaling). For example, spatial bundling may be configured separately for each HARQ-ACK response sent via PUCCH and / or each HARQ-ACK response sent via PUSCH.

[0091] When the maximum number of TBs (or codewords) that can be received at one time (or can be scheduled by one DCI) in the corresponding serving cell is 2 (or greater) (for example, when the high-level parameter maxNrofCodeWordsScheduledByDCI corresponds to 2 TBs), spatial bundling can be supported. In addition, more than four layers can be used for 2TB transmission, and at most four layers can be used for 1TB transmission. As a result, when spatial bundling is configured for the corresponding cell group, spatial bundling can be performed for the serving cells in the cell group that can schedule more than four layers. On the serving cell, a UE that wants to send a HARQ-ACK response through spatial bundling can generate a HARQ-ACK response by performing a bit-by-bit logical AND operation on the A / N bits of multiple TBs.

[0092] For example, assuming that a UE receives a DCI that schedules two TBs and receives the two TBs through a PDSCH based on the DCI, the UE that performs spatial bundling can generate a single A / N bit by performing a logical AND operation on a first A / N bit of a first TB and a second A / N bit of a second TB. As a result, when both the first TB and the second TB are ACK, the UE reports an ACK bit value to the BS, and when either TB is NACK, the UE reports a NACK bit value to the BS.

[0093] For example, when only one TB is actually scheduled in a serving cell configured to receive two TBs, the UE may generate a single A / N bit by performing a logical AND operation on the A / N bits of the one TB and a bit value 1. As a result, the UE reports the A / N bits of the one TB to the BS as is.

[0094] There are multiple parallel DL HARQ processes for DL ​​transmission in the BS / UE. Multiple parallel HARQ processes allow DL transmission to be performed continuously while the BS waits for HARQ feedback on successful or unsuccessful reception of the previous DL transmission. Each HARQ process is associated with a HARQ buffer of the medium access control (MAC) layer. Each DL HARQ process manages state variables such as the number of transmissions of the MAC physical data block (PDU) in the buffer, the HARQ feedback for the MAC PDU in the buffer, and the current redundancy version. Each HARQ process is identified by a HARQ process ID.

[0095] Figure 6 An exemplary PUSCH transmission process is shown. Figure 6 , the UE may detect the PDCCH in slot #n. The PDCCH may include UL scheduling information (eg, DCI format 0_0 or DCI format 0_1). DCI format 0_0 or DCI format 0_1 ​​may include the following information.

[0096] - Frequency domain resource assignment: indicates the RB set allocated to PUSCH.

[0097] -Time domain resource assignment: Specify the slot offset K2 indicating the starting position (eg, symbol index) and the length of the PUSCH in the slot (eg, the number of OFDM symbols). The starting symbol and length of the PUSCH may be indicated by a start and length indicator value (SLIV) or separately.

[0098] Then, the UE may transmit the PUSCH in slot #(n+K2) according to the scheduling information in slot #n. The PUSCH includes the UL-SCH TB.

[0099] QCL (quasi-isotope)

[0100] Two antenna ports are quasi-colocated when the channel properties of an antenna port can be derived from the channel of another antenna port. The channel properties may include one or more of delay spread, Doppler spread, frequency / Doppler shift, average received power, receive timing / average delay, and spatial RX parameters.

[0101] A list of multiple TCI state configurations can be configured to the UE through the high-level parameter PDSCH-Config. Each TCI state is associated with a QCL configuration parameter between one or two DL RSs and the DMRS port of the PDSCH. The QCL may include qcl-Type1 for the first DS RS and qcl-Type2 for the second DL RS. The QCL type may correspond to one of the following types.

[0102] - "QCL-TypeA": {Doppler shift, Doppler spread, average delay, delay spread}

[0103] - "QCL-TypeB": {Doppler shift, Doppler spread}

[0104] - "QCL-TypeC": {Doppler shift, average delay}

[0105] - "QCL-TypeD": {spatial Rx parameters}

[0106] Beam Management (BM)

[0107] BM is a series of processes for acquiring and maintaining a set of BS (or transmission and reception point (TRP)) beams and / or UE beams that can be used for DL ​​and UL transmission / reception. BM may include the following processes and terms.

[0108] -Beam measurement: The BS or UE measures the characteristics of the received beamformed signal.

[0109] -Beam determination: The BS or UE selects its transmit (Tx) beam / receive (Rx) beam.

[0110] - Beam sweeping: Covering the spatial domain using a Tx beam and / or an Rx beam in a predetermined manner during a predetermined time interval.

[0111] -Beam reporting: The UE reports information about the beamformed signal based on beam measurements.

[0112] BM processing may be divided into (1) DL BM processing using SSB or CSI-RS and (2) UL BM processing using a sounding reference signal (SRS). In addition, each BM processing may include Tx beam sweeping for determining a Tx beam and Rx beam sweeping for determining an Rx beam.

[0113] The DL BM process may include (1) beamforming DL RS (eg, CSI-RS or SSB) transmission from the BS and (2) beam reporting from the UE.

[0114] The beam report may include a preferred DL RS ID and a reference signal received power (RSRP) corresponding to the DL RS ID. The DL RS ID may be a SSB resource indicator (SSBRI) or a CSI-RS resource indicator (CRI).

[0115] M-TRP (Multiple Transmit and Receive Point) in NR Release 16

[0116] In NR Release 16, the S-DCI-based M-TRP PDSCH transmission method and the M-DCI-based M-TRPPDSCH transmission method are supported.

[0117] -S-DCI based M-TRP PDSCH in NR Release 16

[0118] One of SDM, FDM, and TDM can be used by further dividing the S-DCI-based M-TRP PDSCH transmission. In the case of SDM, one TB is sent in multiple layers, but the layers belonging to different DM-RS CDM groups are sent on different Tx beams (i.e., with different QCL RS or different TCI states). This can increase the number of layers compared to the existing S-TRP transmission method, thereby improving the transmission capacity. In addition, when one TB is sent in multiple layers, some layers are sent to TRP 1 and other layers are sent to TRP 2, which can improve channel reliability through diversity gain.

[0119] In the case of FDM, two schemes are supported, Scheme 2a and Scheme 2b. In Scheme 2a, a single TB is transmitted in multiple RBs, but RBs belonging to different RB groups are transmitted on different Tx beams (i.e., QCL RS or TCI states). In Scheme 2b, the same TB is transmitted in different RB groups, but RBs belonging to different RB groups are transmitted on different Tx beams (i.e., QCL RS or TCI states).

[0120] In the case of TDM, two schemes are supported, Scheme 3 and Scheme 4. In Scheme 4 of inter-slot TDM, the same TB is repeatedly transmitted in multiple slots, but slots belonging to different slot groups are transmitted on different Tx beams (i.e., QCL RS or TCI states). In contrast, in Scheme 4 of intra-slot TDM, the same TB is repeatedly transmitted in multiple OFDM symbol groups, but some OFDM symbol groups and the remaining OFDM symbol groups are transmitted on different Tx beams (i.e., QCL RS or TCI states).

[0121] - M-TRP PDSCH based on M-DCI in NR Release 16

[0122] M-TRP PDSCH transmission based on M-DCI is a method in which each TRP schedules and transmits PDSCH through DCI. That is, TRP 1 transmits PDSCH 1 through DCI 1, and TRP 2 transmits PDSCH 2 through DCI 2. When PDSCH 1 and PDSCH 2 overlap on the same time and frequency resources, the two PDSCHs are received in the same RE, which increases resource efficiency and therefore increases transmission capacity.

[0123] To this end, NR Release 16 introduces CORESET pools, which are groups of multiple CORESETs. TRP 1 sends PDCCH in the CORESETs belonging to CORESET pool 0, and also sends PDSCH scheduled by the PDCCH. TRP 2 sends PDCCH in the CORESETs belonging to CORESET pool 1, and also sends PDSCH scheduled by the PDCCH. A specific TRP can schedule PUSCH transmission of the UE through the CORESETs belonging to each CORESET pool. UCI is received on PUCCH in some PUCCH resources scheduled by TRP 1 and the remaining PUCCH resources scheduled by TRP 2. In the case of PUSCH or PUCCH, the channels scheduled or used by the TRP are TDM with each other, so there is no overlap and an increase in transmission capacity cannot be expected. However, the UE can send independent PUSCH / PUCCH to each of TRP 1 and TRP 2.

[0124] M-TRP transmission in NR Release 17

[0125] NR Release 17 supports M-TRP PDCCH repetition transmission, M-TRP PDCCH / PDSCH SFN transmission, S-DCI-based M-TRP PUSCH repetition transmission, and M-TRP PUCCH repetition transmission based on a single PUCCH resource.

[0126] In all these transmission techniques, the same content (i.e., DCI, UL TB, or UCI) is repeatedly transmitted with URLLC target enhancement in order to increase reliability. The repetition transmission is performed with TDM or FDM in the case of M-TRP PDCCH repetition transmission, the repetition transmission is performed in the same time / frequency / layer in the case of M-TRP PDCCH / PDSCH SFN transmission, the repetition transmission is performed with TDM in the case of M-TRP PUSCH repetition transmission based on S-DCI, and the repetition transmission is performed with TDM in the case of M-TRPPUCCH repetition transmission based on a single PUCCH resource.

[0127] -S-DCI-based M-TRP PDCCH repetitive transmission in NR Release 17

[0128] In NR Release 17, for M-TRP PDCCH repeated transmission, multiple CORESETs configured with different TCI states (i.e., different QCL RSs) are configured for the UE, and multiple SS sets connected to the CORESETs are configured. The BS indicates / configures the link between the SS set connected to one CORESET and the SS set connected to another CORESET to / for the UE for repeated transmission, so that the UE can know that the PDCCH candidates of the SS set are repeatedly sent.

[0129] For example, two CORESETs, CORESET#0 and CORESET#1, may be configured for the UE, which are connected to SS sets #0 and #1, respectively, and SS set #0 and SS set #1 may be linked. The UE may know that the same DCI is repeatedly transmitted on the PDCCH candidate of SS set #0 and the PDCCH candidate of SS set #1, and through a specific rule, a specific PDCCH candidate of SS set #0 and a specific PDCCH candidate of SS set #1 are a pair configured for repeated transmission of the same DCI. The two PDCCH candidates are called linked PDCCH candidates, and when the UE successfully receives either of the two PDCCH candidates, the UE may successfully decode the DCI. However, when receiving PDCCH candidates of SS set #0, the UE uses the QCL RS (i.e., DL beam) of the TCI state connected to CORESET #0 of SS set #0, and when receiving PDCCH candidates of SS set #1, it uses the QCL RS (i.e., DL beam) of the TCI state connected to CORESET #1 of SS set #1, so that the UE receives the linked PDCCH candidates in different beams.

[0130] -M-TRP SFN PDCCH in NR Release 17

[0131] As a special case of M-TRP PDCCH repetitive transmission, multiple TRPs can repeatedly send the same DCI over the same time / frequency / DM-RS port, which can be called SFN PDCCH transmission. However, for SFN PDCCH transmission, the BS configures multiple TCI states for one CORESET (rather than multiple CORESETs with different TCI states). When the UE receives a PDCCH candidate in the SS set connected to this one CORESET, it performs channel estimation on the PDCCH DM-RS and attempts to decode the PDCCH DM-RS using all these multiple TCI states.

[0132] -M-TRP SFN PDSCH in NR Release 17

[0133] In the above-mentioned M-TRP PDSCH repetition transmission, the two TRPs repeatedly send the corresponding channels in different resources. However, in special cases, when the two TRPs use the same resources, that is, even when the same channel is repeatedly sent in the same frequency, time and layer (or DM-RS port), the reliability of the channel can be improved. In this case, the repeatedly transmitted same channels are combined and received in the air because their resources are not distinguished. Therefore, from the perspective of the receiver, they are identified as one channel. In the NR standard, for PDSCH SFN transmission, two DL TCI states can be configured for PDSCH DM-RS reception.

[0134] -S-DCI-based M-TRP PUSCH repetitive transmission in NR Release 17

[0135] For S-DCI-based M-TRP PUSCH transmission, the BS configures two SRS sets for the UE, and the SRS sets are used to indicate the UL transmission port and UL beam / QCL information of TRP#1 and TRP#2, respectively. In addition, the BS may indicate the SRS resources of the corresponding SRS set through two SRI fields in one DCI, and indicate up to two power control (PC) parameter sets. For example, the first SRI field may indicate the SRS resources and PC parameter set defined for set 0, and the second SRI field may indicate the SRS resources and PC parameter set defined for set 1.

[0136] The UE receives an indication of the UL Tx port, PC parameter set, and UL beam / QCL information for TRP#1 through the first SRI field, and performs PUSCH transmission in the TO corresponding to SRS set #0. Similarly, the UE receives an indication of the UL Tx port, PC parameter set, and UL beam / QCL information for TRP#2 through the second SRI field, and performs PUSCH transmission in the TO corresponding to SRS set #1.

[0137] -M-TRP PUCCH repetitive transmission based on a single PUCCH resource in NR Release 17

[0138] For M-TRP PUCCH transmission based on a single PUCCH resource, the BS enables / configures two spatial relationship information for a single PUCCH resource for the UE, and when the UE sends UCI in the PUCCH resource, the spatial relationship information is used to indicate the spatial relationship information of TRP#1 and TRP#2 respectively.

[0139] For example, the UE receives an indication of the Tx beam / PC parameters for TRP#1 through the value indicated by the first spatial relationship information, and uses the information to perform PUCCH transmission in the TO corresponding to TRP#1. Similarly, the UE receives an indication of the Tx beam / PC parameters for TRP#2 through the value indicated by the second spatial relationship information, and uses the information to perform PUCCH transmission in the TO corresponding to TRP#2.

[0140] In the Rel 17 standardization meeting, the configuration method is enhanced so that two spatial relationship information can be configured for PUCCH resources for M-TRP PUCCH repeated transmission. That is, when the PC parameters are set in each spatial relationship information, the spatial relationship RS can be configured. As a result, the PC information and spatial relationship RS information corresponding to the two TRPs can be configured through the two spatial relationship information, and the UE uses the first spatial relationship information to send UCI in TO 1 through PUCCH, and uses the second spatial relationship information to send the same UCI (i.e., CSI, ACKNAK, SR) in TO 2 through PUCCH.

[0141] In the following, a PUCCH resource configured with two spatial relationship information is referred to as an M-TRP PUCCH resource, and a PUCCH resource configured with one spatial relationship information is referred to as an S-TRP PUCCH resource.

[0142] Meaning of TCI status / beam indication

[0143] Using or mapping a specific TCI state (or TCI) when receiving data / DCI / UCI in a specific frequency / time / space resource may mean that in DL, the QCL type and QCL RS indicated by the DL TCI state are used to estimate the channel from the DM-RS in the frequency / time / space resource, and data / DCI is received / demodulated based on the estimated channel.

[0144] In UL, it may mean sending / modulating DM-RS and data / UCI in frequency / time / space resources using the Tx beam and / or Tx power indicated by the UL TCI state.

[0145] The UL TCI state includes information about a Tx beam or Tx power for the UE, which may be configured for the UE through other parameters such as spatial relation information rather than the TCI state.

[0146] The UL TCI state may be directly indicated by the DCI carrying the UL grant, or may mean the spatial relationship information of the SRS resource indicated by the SRI field in the UL grant DCI. Alternatively, it may mean the open-loop Tx power control parameter linked to the value indicated by the SRI field in the UL grant DCI. Alternatively, the UL TCI may be indicated by the DL grant DCI.

[0147] For ease of explanation, the methods proposed in the present disclosure will be described by assuming collaborative transmission / reception between two TRPs, but these methods can also be extended and applied to environments with three or more multi-TRPs and multi-panel environments. The UE can identify different TRPs as different TCI states. When the UE uses TCI state 1 to send / receive data / DCI / UCI, it means that the UE uses TRP 1 to send and receive data / DCI / UCI.

[0148] In the present disclosure, a transmission opportunity (TO) refers to each channel being sent at different times when multiple channels are TDM, each channel being sent at different frequencies / RBs when multiple channels are frequency division multiplexed (FDM), and / or each channel being sent at different layers / beams / DM-RS ports when multiple channels are space division multiplexed (SDM). Each TO is mapped to one TCI state. When the same channel is repeatedly sent, the complete DCI / data / UCI is sent in one TO, and the receiver receives multiple TOs to improve the reception success rate.

[0149] Uplink Transmit Power Control

[0150] In a wireless communication system, it may be necessary to increase or decrease the transmission power of a UE depending on the situation. Controlling the transmission power of a UE and / or mobile device is referred to as UL power control. For example, transmission power control may be applied to meet requirements (e.g., signal-to-noise ratio (SNR), bit error rate (BER), block error rate (BLER), etc.) at a BS (e.g., gNB, eNB, etc.).

[0151] Power control may be performed using an open-loop power control method and a closed-loop power control method.

[0152] Specifically, the open-loop power control method refers to a method of controlling transmission power without feedback from a transmitting device (e.g., BS) to a receiving device (e.g., UE) and / or feedback from a receiving device to a transmitting device. For example, the UE receives a specific channel / signal (pilot channel / signal) from the BS and estimates the received power strength using the channel / signal. The UE can then control the transmission power using the estimated received power strength.

[0153] In contrast, the closed-loop power control method refers to a method of controlling transmission power based on feedback from a transmitting device to a receiving device and / or feedback from a receiving device to a transmitting device. For example, a BS receives a specific channel / signal from a UE, and based on the power level, SNR, BER, BLER, etc. measured from the received specific channel / signal, the BS determines an optimal power level for the UE. The BS then sends information (i.e., feedback) about the determined optimal power level to the UE via a control channel, and the UE can control its transmission power using the feedback provided by the BS.

[0154] Hereinafter, a power control method when a UE performs UL transmission to a BS in a wireless communication system will be described. Specifically, the power control method will be described for transmission of the following channels: 1) UL data channel (e.g., PUSCH), 2) UL control channel (e.g., PUCCH), 3) SRS, and 4) random access channel (e.g., PRACH).

[0155] In this case, TO(i) of PUSCH, PUCCH, SRS and / or PRACH may be defined by a slot index (n_s) within a frame having a system frame number (SFN), a first symbol (S) within a slot, and the number of consecutive symbols (L).

[0156] Priority of uplink transmission power control

[0157] Hereinafter, a method of controlling transmission power of a UE will be described considering a single cell operation in a carrier aggregation environment or a single cell operation in a multi-UL carrier (eg, two carriers) environment.

[0158] If the total UE transmit (or send) power of the UL transmissions for each transmission opportunity (i) exceeds a linear value of the configured UE transmit (or send) power, the UE may be configured to allocate power to the UL transmissions according to a priority order.

[0159] In this case, the priority of transmission power control may be configured or defined in the following order.

[0160] -PRACH transmission on the primary cell (PCell)

[0161] - PUCCH for Hybrid Automatic Repeat Request-Acknowledgement (HARQ-ACK) information and / or Scheduling Request (SR) or PUSCH for HARQ-ACK information

[0162] - PUCCH or PUSCH for channel state information (CSI)

[0163] - PUSCH not used for HARQ-ACK information nor for CSI

[0164] - SRS transmission or PRACH transmission in a serving cell other than the PCell (however, aperiodic SRS has a higher priority than semi-persistent SRS and / or periodic SRS)

[0165] The UE may control the total transmission power in each symbol of the transmission opportunity (i) to be less than or equal to the linear value of the configured UE transmission power based on the power allocation according to the priority order as described above. For example, to this end, the UE may be configured to scale and / or drop the power of the UL transmission with low priority. In this case, the details of the scaling and / or dropping may be configured or defined according to the UE implementation.

[0166] As a specific example, for transmissions with the same priority in carrier aggregation, the UE may assume that the transmission in the Pcell has a higher priority than the transmission in the secondary cell (Scell). Additionally / alternatively, for transmissions with the same priority in multiple UL carriers (e.g., two UL carriers), the UE may assume that the PUCCH transmission is configured as the carrier with a high priority. In addition, if the PUCCH transmission is not configured on any carrier, the UE may assume that the transmission on the non-supplementary UL carrier has a high priority.

[0167] Figure 7 An exemplary process for UL transmit power control is shown.

[0168] Reference Figure 7 , the UE may receive parameters and / or information related to transmission power (Tx power) from the BS (P05). In this case, the UE may receive corresponding parameters and / or information via high-layer signaling (eg, RRC signaling, MAC-CE, etc.).

[0169] Subsequently, the UE may receive a TPC command related to the transmission power from the BS (P10). In this case, the UE may receive the corresponding TPC command through low-layer signaling (e.g., DCI). For example, for PUSCH transmission, PUCCH transmission, and / or SRS transmission, the UE may receive information about the TPC command to be used for determining the power control adjustment state through the TPC command field of the predefined DCI format as described above. However, the corresponding step may be omitted in PRACH transmission.

[0170] Thereafter, the UE may determine (or calculate) the transmission power (P15) of the UL transmission based on the parameters, information and / or TPC command received from the BS. Additionally / alternatively, when two or more UL channels and / or signals need to be transmitted together as in carrier aggregation, the UE may determine the transmission power of the UL transmission considering the above-mentioned priority order.

[0171] The UE may perform transmission of one or more UL channels and / or signals (eg, PUSCH, PUCCH, SRS, PRACH, etc.) to the BS based on the determined (or calculated) transmission power (P20).

[0172] STxMP (simultaneous transmission across multiple panels)

[0173] In NR Release 18, a method for UE to simultaneously send multiple channels / RS of the same type or multiple channels / RS of different types is being discussed. For legacy UEs, the operation of sending multiple channels / RS at a time is limited. For example, multiple SRS resources can be sent simultaneously in different SRS sets for UL beam measurement, but it is not possible to send multiple PUSCHs simultaneously.

[0174] However, for advanced UEs discussed in NR Release 18, these restrictions are relaxed, allowing the use of multiple transmission panels to simultaneously transmit multiple channels or RSs. Such UEs are referred to as STxMP UEs. For example, two PUSCHs corresponding to two ULTBs are scheduled on the same RE, and in order to transmit PUSCH 1 and PUSCH 2, spatial relation RS1 and power control (PC) parameter set 1 (i.e., UL TCI state 1) and spatial relation RS2 and PC parameter set 2 (i.e., UL TCI state 2) are configured. The UE uses panel 1 corresponding to UL TCI state 1 to transmit PUSCH 1, and panel 2 corresponding to UL TCI state 2 to transmit PUSCH 2.

[0175] When the BS schedules PUSCH via DCI, the BS may indicate whether the PUSCH is to be sent in STxMP mode, using a single panel, or based on M-TRP PUSCH repetition. The UE needs to be STxMP capable and should make the STxMP mode available in advance via RRC signaling. To achieve this, the existing SRS resource set indicator field may be redefined, or a new DCI field may be introduced.

[0176] Transmission power control method for STxMP transmission

[0177] The present disclosure proposes a transmission power control method when the UL channels (e.g., PUSCH / PUCCH / SRS) simultaneously transmitted by the STxMP UE partially overlap in the time domain. When the STxMP UL transmission is scheduled using a single DCI, the UL channels do not partially overlap in the time domain. However, when the STxMP UL transmission is scheduled using multiple DCIs, the UL channels may frequently partially overlap in the time domain.

[0178] Although the following examples mainly focus on the case of utilizing multiple DCI scheduling, the proposed method can be extended and applied to the case where the UL channels are partially overlapped in the time domain even with a single DCI, depending on the transmission method. In particular, for utilizing a single DCI scheduling, dynamic information exchange can be performed between the two TRPs, so the ideal backhaul case can be considered with respect to the method proposed below.

[0179] In 3GPP NR standard release 16, for M-DCI-based M-TRP (based on multi-DCI), UL channels scheduled in different CORESET pools (i.e., different TRPs) should be scheduled at different times. However, in 3GPP NR standard release 18, with the introduction of STxMP UE, since the UE can simultaneously transmit two UL channels / RS (e.g., PUSCH / PUCCH) through each panel, UL channels scheduled in different CORESET pools (i.e., different TRPs) can be transmitted simultaneously even if the UL channels overlap in the time domain.

[0180] For example, when PUSCH 0 is scheduled from OFDM symbol 0 to symbol 4 in CORESET pool 0 (i.e., TRP1), and PUSCH 1 is scheduled from OFDM symbol 2 to symbol 6 in CORESET pool 1 (i.e., TRP2), the STxMP UE may transmit PUSCH 0 using only panel 0 in OFDM symbols 0 and 1, transmit both PUSCH 0 and PUSCH 1 using panel 0 and panel 1 in OFDM symbols 2 to 4, and transmit PUSCH 1 using only panel 1 in OFDM symbols 5 and 6. In OFDM symbols 2 to 4 where two PUSCHs overlap in the time domain, the UE may perform STxMP using panel 0 and panel 1. If power control of each PUSCH in a region is performed according to a conventional method, the transmission power may exceed the value Pc_max.

[0181] For example, if the transmission power of each of PUSCH 0 and PUSCH 1 is Pc_max, the total transmission power may be 2*Pc_max, which exceeds Pc_max. On the other hand, for OFDM symbols 0, 1, 5, and 6 that do not overlap in the time domain, the UE sends a single PUSCH using a single panel. In this case, even if the transmission power of each of PUSCH 0 and PUSCH 1 is Pc_max, the total transmission power does not exceed Pc_max. In other words, for two PUSCHs scheduled in different CORESET pools (or even from a single CORESET pool), if the two PUSCHs partially overlap in the time domain, it is desirable to apply different power control methods for overlapping and non-overlapping areas in the time domain.

[0182] For convenience of explanation, the proposed methods are described based on PUSCH, but these methods are equally applicable to PUCCH / SRS.

[0183] Hereinafter, these methods will be described for two cases: a case where two CORESET pools (i.e., two TRPs) are connected via a non-ideal backhaul without dynamic information exchange and a case where two CORESET pools are connected via an ideal backhaul with dynamic information exchange. The BS may determine which method among the proposed methods to use for the non-ideal and ideal backhaul cases based on the backhaul conditions of the BS. The BS may indicate the determined method to the UE through RRC signaling.

[0184] <Non-ideal return trip situation>

[0185] In the case of non-ideal backhaul, the two TRPs may not exchange information on the dynamically scheduled UL channels. Therefore, TRP1 (i.e., TRP scheduling using CORESET pool 0) may not know whether the UL channels scheduled by TRP 1 overlap with the UL channels scheduled by TRP2 (i.e., TRP scheduling using CORESET pool 1) in the time domain. Similarly, TRP 2 may also not know whether the UL channels scheduled by TRP 2 overlap with the UL channels scheduled by TRP 1 in the time domain.

[0186] Therefore, each TRP should conservatively perform power control of its UL channel by assuming the worst-case scenario that the UL channel overlaps with the UL channel of another cooperating TRP. In other words, although it is uncertain whether the UL channels will overlap, even if the channels overlap, TRP 1 should assume that the maximum transmission power of the UL channel scheduled by TRP 1 is Pc_max (or Pc_max_common)*α (e.g., 1 / 2) to ensure that the total transmission power of the UE does not exceed Pc_max (or Pc_max_common). The final transmission power of PUSCH 0 is determined as the smaller value between the calculated transmission power of PUSCH 0 and Pc_max*α (or Pc_max_common*α).

[0187] Similarly, power control is performed by assuming that the maximum transmission power of the UL channel scheduled by TRP 2 is Pc_max (or Pc_max_common)*(1-α). Therefore, the final transmission power of PUSCH 1 is determined as the smaller value between the calculated transmission power of PUSCH 1 and Pc_max*(1-α) (or Pc_max_common*(1-α)).

[0188] In the above example, the scaling values ​​applied to panel 0 and panel 1 are assumed to be α and 1-α, respectively. However, the same α may also be assumed for both panels.

[0189] The α value may be indicated by the BS to the UE, or the α value may be indicated by the UE to the BS. Alternatively, considering the possibility that all UL channels scheduled in each pool may overlap, α may be set to 1 / (number of CORESET pools) or 1 / (number of panels that can perform simultaneous transmission), or α may be set to min(1 / number of CORESET pools, 1 / number of panels that can perform simultaneous transmission).

[0190] <Ideal return trip situation>

[0191] In an ideal backhaul case, two TRPs can exchange information on dynamically scheduled UL channels. Therefore, TRP 1 (i.e., TRP scheduling using CORESET pool 0) can know whether the UL channel scheduled by TRP 1 partially overlaps with the UL channel scheduled by TRP 2 (i.e., TRP scheduling using CORESET pool 1) in the time domain. Similarly, TRP 2 can also know whether the UL channel scheduled by TRP 2 partially overlaps with the UL channel scheduled by TRP 1 in the time domain. As a result, each TRP can distinguish between overlapping symbol sets and non-overlapping symbol sets for the UL channels sent by the TRP and apply different power control methods to the overlapping symbol sets and non-overlapping symbol sets. The UE should also distinguish between overlapping symbol sets and non-overlapping symbol sets for the UL channels and apply different power control methods.

[0192] For non-overlapping symbol sets, the existing power control method can be applied as is.

[0193] For overlapping symbol sets, the power control method proposed in the non-ideal backhaul case can be applied as is. As a result, the total transmission power of each panel can always satisfy the condition of being less than or equal to Pc_max (or Pc_max_common).

[0194] Alternatively, if the sum of the transmission powers of the two panels exceeds Pc_max (or Pc_max_common), the transmission powers of the individual panels may be readjusted to ensure that the total transmission power does not exceed Pc_max (or Pc_max_common). The transmission power of some or all panels may be reduced proportionally. For example, if the proportional reduction is applied to only one of the panels (if there is a predefined panel priority, and for convenience, this panel is referred to as panel 2 with a lower priority), the transmission power of panel 2 may be proportionally reduced by multiplying the transmission power of panel 2 by the value [(Pc_max_common-transmission power of panel 1) / transmission power of panel 2]. Alternatively, the calculated power offset may also be subtracted from the transmission power of some or all panels.

[0195] When the sum of the transmission powers of two panels exceeds Pc_max (or Pc_max_common), if the transmission powers of the individual panels are readjusted to ensure that the total transmission power does not exceed Pc_max (or Pc_max_common), the following is proposed to determine the panel whose transmission power needs to be reduced first.

[0196] First proposal - first reduce the transmission power of UL channels scheduled by a specific CORESET pool or a specific TRP. For example, if CORESET pool 0 and CORESET pool 1 schedule PUSCH 0 and PUSCH 1 respectively, then first reduce the transmission power of PUSCH 1 with lower priority. This ensures that one TRP takes precedence over another TRP in terms of UL transmission power allocation.

[0197] Second proposal - When a PUSCH including UCI (e.g., PUSCH 0) and a PUSCH with only data (e.g., PUSCH 1) are transmitted based on STxMP, the transmit power of PUSCH 1 is reduced first. This ensures that UCI takes precedence over UL TBs in terms of UL transmit power allocation. If two UL channels (PUSCH or PUCCH) include UCI, the above first proposal can be applied to determine the priority of UL transmit power allocation.

[0198] The third proposal - determine the priority of UL transmission power allocation according to the UCI type of the two UL channels sent based on STxMP. For example, the UL transmission power allocation priority is determined as follows: ACK / NACK (highest priority)>SR>CSI (lowest priority). If the priorities are the same, the first proposal can be applied to determine the UL transmission power allocation priority.

[0199] In addition, even for the same UCI type (ie, ACK / NACK, SR, or CSI), priority may be determined as follows to perform UL transmission power allocation.

[0200] For example, according to the current 3GPP NR standard version 16, the priority between ACK / NACK types is configured as follows. For a single cell, the UE is configured with a PUCCH configuration list, and within the PUCCH configuration list, two PUCCH configurations (e.g., PUCCH configuration 1 and PUCCH configuration 2) may be configured. For each PUCCH configuration, an independent ACK / NACK codebook type may be configured, and an independent PUCCH resource may also be configured. If ACK / NACK is sent based on the codebook type and PUCCH resource configured for PUCCH configuration 1, the ACK / NACK is regarded as a priority 0 ACK / NACK. On the other hand, if ACK / NACK is sent based on the codebook type and PUCCH resource configured for PUCCH configuration 2, the ACK / NACK is regarded as a priority 1 ACK / NACK having a higher priority than a priority 0 ACK / NACK. Therefore, when a PUCCH or PUSCH including an ACK / NACK priority 1 and a PUCCH or PUSCH including an ACK / NACK priority 0 are sent based on STxMP, the transmission power of the PUCCH or PUSCH including the ACK / NACK priority 0 is first reduced.

[0201] In the case of SR, multiple SR resource configurations may be configured within a PUCCH configuration (the first PUCCH configuration if there are multiple PUCCH configurations), and within each SR resource configuration, low / high (i.e., level 2) priority may be indicated by phy-PriorityIndex-r16. For CSI, priority is also distinguished as specified in clause 5.2.5 of 3GPP NR 38.214.

[0202] Regarding the priority of SR or ACK / NACK, the BS may give priority to SR or ACK / NACK of URLLC data having a higher priority, while the BS may assign a lower priority to data not related to URLLC.

[0203] Fourth proposal - Use the scheduling priority index of PUSCH to determine the panel for which PUSCH transmission power is reduced first. For DCI format 0_2, a 1-bit priority indicator can be configured. Using the 1-bit priority indicator, the BS can indicate the priority of the PUSCH scheduled by the DCI to the UE. In particular, if there is no priority indicator within the DCI, the PUSCH can be assumed to have a lower priority. Therefore, the transmission power of the panel with the lower priority PUSCH is reduced first.

[0204] The first to fourth proposals may be applied in combination. For example, one proposal may be applied first, and if the priority is not identified using the proposal, another proposal may be applied to identify the priority.

[0205] In the above proposal, if the UL channel transmission power of a specific panel is first reduced, the transmission power of the panel may become 0. In this case, since STxMP is not allowed, a minimum transmission power value m of each panel may be introduced to perform STxMP. That is, the transmission power of the lower priority panel is reduced to be not less than the minimum value m. Even after the transmission power of the lower priority panel is reduced to the minimum value m, if the sum of the transmission powers of the two panels exceeds Pc_max (or Pc_max_common), the transmission power of the higher priority panel is further reduced.

[0206] In the above proposal, different power control methods are applied to non-overlapping symbol sets and overlapping symbol sets. As a result, there is an implementation burden for the UE to perform symbol-level power control. Therefore, UEs that can perform symbol-level power control and UEs that cannot perform symbol-level power control can be distinguished, and each UE can report this capability as a UE capability. For UEs that cannot perform symbol-level power control, the power control method applied to the overlapping symbol set can also be applied to the non-overlapping symbol set.

[0207] In the above, four proposals are described to determine the panel whose transmission power needs to be reduced first. In the following, it will be described how to determine the priority based on the number of repetitions of the channels sent on the panel. For example, if the PUSCH on panel 0 is not repeated (i.e., the number of repetitions is 1) and the PUSCH on panel 1 is repeated (i.e., the number of repetitions>1), the transmission power of the repeated PUSCH is reduced first. In the case of repeated PUSCH, the PUSCH can be sent separately in other repeated transmission opportunities where there is no overlap in the time domain. For example, when the PUSCH is repeated four times, if the first PUSCH is sent in STxMP mode, the remaining three repetitions of the transmission can be performed on a single panel. Therefore, for the PUSCH that is not repeated, since there is only one transmission opportunity, it is preferred to allocate transmission power to the PUSCH first.

[0208] The above operations can be summarized as follows. The transmission power of the PUSCH with a larger number of repetitions can be reduced first. Alternatively, the transmission power of the PUSCH with a smaller number of repetitions can be reduced first. If the number of repetitions of a channel is higher, it is preferred to assign a higher transmission power priority to the channel because the channel needs to achieve higher reliability. However, for repeated transmission opportunities that overlap in the time domain, its transmission power needs to be reduced, while for repeated transmission opportunities that do not overlap in the time domain, transmission is performed without reducing its transmission power according to the existing method.

[0209] In the proposed ideal backhaul scenario, the priority determination method can be directly applied to determine the panel that needs to reduce the transmission power first. For example, the transmission power allocation priority applied to the carrier aggregation (CA) environment can be applied as the STxMP power allocation priority. Similarly, since it is also stipulated that the priority is considered when selecting the UL channel, the priority can be directly used to determine the transmission power allocation priority of STxMP. However, in the case of STxMP, multiple channels can be transmitted simultaneously across multiple panels. Therefore, instead of selecting one channel and discarding the other channels as in the prior art, multiple channels are selected and multiple channels are transmitted simultaneously with the allocated transmission power.

[0210] <Power control method for CG PUSCH STxMP transmission>

[0211] In 3GPP NR Release 15, only one configured grant (CG) PUSCH can be configured for each cell. However, from 3GPP NR Release 16, multiple CG PUSCHs can be configured for each cell, and the types of each CG PUSCH can be configured differently. In this case, the symbols assigned to different CG PUSCHs can overlap in the time domain. A UE without STxMP capability can only select one of the multiple CG PUSCHs for transmission, and the other CG PUSCHs can be not sent. According to 3GPP NR TS38.213, for two CG PUSCHs with different priority indices, the CG PUSCH with the higher priority index is sent.

[0212] In addition, two methods for determining the CG PUSCH to be selected are described in 3GPP NR TS 38.321. The first method depends on the UE implementation. That is, the UE selects a CG PUSCH. According to the second method, the BS informs the UE of the priority based on the data type of the PUSCH TB, and the UE selects the CG PUSCH according to the priority. The data type is determined based on the TB type created at the MAC layer, which is different from CG PUSCH type 1 and CG PUSCH type 2. Therefore, the priority of PUSCH type 1 can be higher than that of PUSCH type 2, or vice versa.

[0213] For CG PUSCH, there may or may not be a potential UL TB in the symbol scheduled with the resources pre-allocated for the potential UL TB. Therefore, the BS should perform blind detection (BD) to determine whether to send CG PUSCH. From the perspective of transmission power allocation, the BS can interpret whether the UE sends the PUSCH with the transmission power calculated according to the predefined rules or with zero transmission power by performing BD.

[0214] Considering the characteristics of CG PUSCH, whether the connection between two TRPs (or two cells) corresponding to two CORESET pools is an ideal backhaul or not, one TRP may not know whether the CG PUSCH scheduled by the other TRP is actually transmitted. Therefore, it is preferable to assume a worst-case scenario such as a non-ideal backhaul, and consider that the other TRP is transmitting the CG PUSCH in the CG PUSCH symbols of the corresponding TRP. In other words, regardless of whether the backhaul is ideal or non-ideal, the method proposed for the non-ideal backhaul case needs to be applied.

[0215] Alternatively, when there is an overlap between CG PUSCH symbols, the method proposed for the ideal backhaul case can be used to perform power control. In this case, the priority indices configured for the CG PUSCH can be compared, and the transmission power of the CG PUSCH with a smaller index (i.e., lower priority) can be reduced first. Alternatively, based on the priority selection method defined in the existing standard for CG PUSCH, the CG PUSCH whose transmission power needs to be reduced first can be selected.

[0216] Alternatively, CG PUSCH type 2 can be considered to have a higher priority than CG PUSCH type 1, and the transmission power of CG PUSCH type 1 can be reduced first. Since CG PUSCH type 2 is enabled via DCI and can be considered to have a closer scheduling time compared to CG PUSCH type 1, the transmission priority and power allocation priority of type 2 CG PUSCH can be set higher than those of type 1 CG PUSCH. Conversely, CG PUSCH type 1 can be processed with a priority higher than that of CG PUSCH type 2, and the transmission power of CG PUSCH type 2 can be reduced first.

[0217] Here, the TRP can be replaced by the serving cell. Alternatively, the TRP can correspond to the CORESET pool index. TRP 0 and TRP1 can be represented as CORESET pool 0 and CORESET pool 1, respectively. The PUSCH of CORESET pool x refers to the PUSCH for which the scheduling DCI or enabling DCI is set to CORESET pool x. Type 1 CG PUSCH refers to the type 1 CG PUSCH in which the SRS resource set index x is configured in ConfiguredGrantConfig.

[0218] <Power control method for STxMP transmission of CG PUSCH and DG PUSCH>

[0219] According to the current NR standard, when the symbol of the CG PUSCH and the symbol of the dynamic grant (DG) PUSCH overlap in a single cell, the DG PUSCH is transmitted and the CG PUSCH is not transmitted. However, if the priority indexes of the DG PUSCH and the CG PUSCH are different, the PUSCH to be transmitted is selected based on the priority index. For example, if the priority index of the CG PUSCH is higher than the priority index of the DG PUSCH, the CG PUSCH may be transmitted and the DG PUSCH may not be transmitted.

[0220] According to the current NR standard, in a CA environment, when the symbol of the DG PUSCH from one cell overlaps with the symbol of the CG PUSCH from another cell, the transmission power can be allocated to the channel with a higher priority index, and the remaining channels can be transmitted with the remaining transmission power or not transmitted at all. In other words, the transmission power allocation of the remaining channels is determined based on the UE implementation.

[0221] In the case of an ideal backhaul, the power control method proposed for the ideal backhaul case may be applied, and the transmission power of the channel with the lower priority index may be reduced first. If the priority indexes are the same, the transmission power of the CGPUSCH needs to be reduced first. For DG PUSCH, since the scheduling time of DG PUSCH is considered to be closer than that of CG PUSCH, the transmission priority and transmission power allocation priority of DG PUSCH may be set higher than that of CG PUSCH. Alternatively, CGPUSCH may be processed with a higher priority than DG PUSCH, and the transmission power of DG PUSCH may be reduced first.

[0222] On the other hand, the Type 1CG PUSCH is not directly connected to the CORESET pool index, but to the SRS resource set index. Therefore, whether there is overlap between Type 1CG PUSCHs sent by different TRPs or between Type 1CG PUSCHs sent by the same TRP can be determined by the SRS resource set index related to the PUSCH. In this case, in the method of allocating transmission power or determining transmission power allocation priority using the CORESET pool index, when applied to the Type 1CG PUSCH, the CORESET pool index can be replaced with the SRS resource set index. When the DG PUSCH or Type 2CG PUSCH overlaps with the Type 1CG PUSCH, the SRS resource set index 0 related to the Type 1CG PUSCH is interpreted as corresponding to the CORESET pool index 0, and the transmission power allocation method between the PUSCHs is applied accordingly. Similarly, the SRS resource set index 1 related to the Type 1CG PUSCH is interpreted as corresponding to the CORESET pool index 1, and the transmission power allocation method between the PUSCHs is applied accordingly.

[0223] Figure 8 is a flowchart illustrating a power control method when a UE performs STxMP according to the present disclosure.

[0224] Reference Figure 8 In step A05, the UE determines a first transmission power of a first UL channel based on the first UL grant, and determines a second transmission power of a second UL channel based on the second UL grant.

[0225] In the present disclosure, it is assumed that the first UL channel and the second UL channel are simultaneously transmitted to the BS. Therefore, in step A10, the UE selects one of the first transmission power and the second transmission power based on a first CORESET (Control Resource Set) index related to the first UL grant and a second CORESET index related to the second UL grant.

[0226] In this case, if at least one of the first UL grant and the second UL grant is Type 1CG, the SRS resource index related to the UL grant may be regarded as a CORESET index related to the corresponding UL grant.

[0227] Alternatively, if at least one of the first UL grant and the second UL grant is a Type 2CG, the CORESET index related to the Type 2CG may be an index of a CORESET that receives the DCI including the enablement indicator of the Type 2CG.

[0228] Alternatively, among the first transmission power and the second transmission power, the transmission power of the UL channel to be transmitted based on the UL grant related to the higher CORESET index between the first CORESET index and the second CORESET index may be selected.

[0229] Next, in step A15, the UE reduces the selected transmission power so that the sum of the first transmission power and the second transmission power meets the maximum transmission power of the UE. If the selected transmission power is reduced to the minimum transmission power, the other transmission power may also be reduced.

[0230] Finally, in step A20, the UE transmits the first UL channel to the BS at the first transmission power based on the first UL grant, and simultaneously transmits the second UL channel to the BS at the second transmission power based on the second UL grant.

[0231] In the present disclosure, since the entity responsible for UL transmission power control is the BS / TRP, the proposed method is explained from the perspective of the BS. However, since the UE needs to adjust the transmission power as expected by the BS, the entity to which the proposed method is applied is the UE.

[0232] In the present disclosure, for PUSCH, multiple panels may correspond to multiple SRS resource sets specified for closed loop / non-closed loop (CB / NCB) purposes or SRS resources indicated by multiple SRI fields. For example, panel 1 and panel 2 may correspond to SRS resource set 0 and SRS resource set 1, respectively. Alternatively, panel 1 and panel 2 may correspond to SRS resources indicated by the first SRI field and the second SRI field, respectively. In addition, multiple panels may correspond to PMIs indicated by multiple transmitter panel modulation indicator (TPMI) fields. For example, panel 1 may correspond to the PMI indicated by the first TPMI field, and panel 2 may correspond to the PMI indicated by the second TPMI field. In addition, for PUCCH, multiple panels may correspond to multiple pieces of spatial relationship information (SRI) configured for PUCCH resources. For example, panel 1 may correspond to spatial relationship information (or info) 0, and panel 2 may correspond to spatial relationship information (or info) 1. Alternatively, in order to directly indicate the panel, a panel ID may be introduced in the standard. Alternatively, multiple panels may correspond to multiple UL TCI states indicated by a unified TCI framework.

[0233] Alternatively, a panel may be defined as a group of antenna ports with coherence. For example, when a 4Tx codebook is configured in the existing standard, PUSCH antenna ports 1000 and 1002 may be defined as panel 1, and PUSCH antenna ports 1001 and 1003 may be defined as panel 2. Similarly, if an 8Tx codebook is introduced in the future, PUSCH antenna ports 1000, 1002, 1004, and 1006 may be defined as panel 1, and PUSCH antenna ports 1001, 1003, 1005, and 1007 may be defined as panel 2. For NCBPUSCH, a phase tracking reference signal (PT-RS) port index may be configured for each SRS resource, and it may be assumed that SRS resources with the same PT-RS port index are transmitted on the same panel.

[0234] For ease of explanation, the above proposal assumes two STxMP panels, two UL TCI states, and two spatial relationship information / RS and PC sets configured for UL M-TRP transmission. However, the two panels, TCI states, and sets can be extended and applied to N1, N2 or N3 panels, TCI states, and sets, respectively.

[0235] The above proposals can ultimately be applied through composition / aggregation.

[0236] The above proposals are described based on PUSCH, but these proposals can also be extended and applied to other channels, such as PUCCH, PDSCH, PDCCH, etc.

[0237] The applicability of the above proposals and the parameters used in the proposals may be provided by the BS to the UE through DCI, MAC-CE or RRC signaling, or reported by the UE to the BS.

[0238] Fig. 9 An exemplary communication system to which the present embodiment is applied is shown.

[0239] Reference Fig. 9, the communication system 1 applied to the present embodiment includes a wireless device, a base station (BS), and a network. Herein, the wireless device refers to a device that performs communication using a radio access technology (RAT) (e.g., 5G new RAT (NR) or long term evolution (LTE)), and may be referred to 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 Internet of Things (IoT) device 100f, and an artificial intelligence (AI) device / server 400. For example, a vehicle may include a vehicle with a wireless communication function, an autonomous driving vehicle, and a vehicle capable of performing communication between vehicles. Herein, 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, a smart phone, a computer, a wearable device, a home appliance device, a digital sign, a vehicle, a robot, etc. Handheld devices may include smart phones, smart boards, wearable devices (e.g., smart watches or smart glasses), and computers (e.g., notebooks). Home appliances may include TVs, refrigerators, and washing machines. IoT devices may include sensors and smart meters. For example, a BS and a network may be implemented as wireless devices, and a specific wireless device 200a may operate as a BS / network node relative to other wireless devices.

[0240] The wireless devices 100a to 100f may be connected to the network 300 via the BS 200. The AI ​​technology may be applied to the wireless devices 100a to 100f, and the wireless devices 100a to 100f may be connected to the AI ​​server 400 via the network 300. The network 300 may be configured using a 3G network, a 4G (e.g., LTE) network, or a 5G (e.g., NR) network. Although the wireless devices 100a to 100f may communicate with each other via the BS 200 / network 300, the wireless devices 100a to 100f may perform direct communication (e.g., side link communication) with each other without passing through the BS / network. For example, vehicles 100b-1 and 100b-2 may perform direct communication (e.g., vehicle-to-vehicle (V2V) / vehicle-to-everything (V2X) communication). An IoT device (e.g., a sensor) may perform direct communication with other IoT devices (e.g., a sensor) or other wireless devices 100a to 100f.

[0241] Wireless communication / connection 150a, 150b or 150c may be established between wireless devices 100a to 100f / BS200 or BS200 / BS200. Herein, wireless communication / connection may be established through various RATs (e.g., 5G NR) such as uplink / downlink communication 150a, sidelink communication 150b (or D2D communication) or inter-BS communication (e.g., relay, integrated access backhaul (IAB)). The wireless device and the BS / wireless device may send / receive radio signals to / from each other through wireless communication / connection 150a and 150b. For example, wireless communication / connection 150a and 150b may send / receive signals through various physical channels. To this end, at least a portion of various configuration information for configuring processes for sending / receiving radio signals, various signal processing processes (e.g., channel coding / decoding, modulation / demodulation, and resource mapping / demapping), and resource allocation processes may be performed based on various proposals of the present embodiment.

[0242] Fig.10 An exemplary wireless device to which the present embodiment is applicable is shown.

[0243] Reference Fig.10 , the first wireless device 100 and the second wireless device 200 may transmit radio signals via various RATs (e.g., LTE and NR). Herein, {the first wireless device 100 and the second wireless device 200} may correspond to Fig. 9 {wireless device 100x and BS 200} and / or {wireless device 100x and wireless device 100x}.

[0244] The first wireless device 100 may include one or more processors 102 and one or more memories 104, and further include one or more transceivers 106 and / or one or more antennas 108. The processor 102 may control the memory 104 and / or the transceiver 106, and may be configured to implement the description, functions, processes, proposals, methods, and / or operation flowcharts disclosed in this document. For example, the processor 102 may process the information in the memory 104 to generate first information / signals, and then transmit a radio signal including the first information / signals through the transceiver 106. The processor 102 may receive a radio signal including second information / signals through the transceiver 106, and then store information obtained by processing the second information / signals in the memory 104. The memory 104 may be connected to the processor 102, and may store various information related to the operation of the processor 102. For example, the memory 104 may store software codes including commands for executing part or all of the processes controlled by the processor 102 or for executing the description, functions, processes, proposals, methods, and / or operation flowcharts disclosed in this document. Herein, the processor 102 and the memory 104 may be part of a communication modem / circuit / chip designed to implement a RAT (e.g., LTE or NR). The transceiver 106 may be connected to the processor 102 and transmit and / or receive radio signals through one or more antennas 108. Each transceiver 106 may include a transmitter and / or a receiver. The transceiver 106 may be used interchangeably with a radio frequency (RF) unit. In this embodiment, the wireless device may represent a communication modem / circuit / chip.

[0245] The second wireless device 200 may include one or more processors 202 and one or more memories 204, and 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 description, functions, processes, proposals, methods, and / or operation flowcharts 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 radio signal including the third information / signals through the transceiver 206. The processor 202 may receive a radio signal including fourth information / signals through the transceiver 206, 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 may store various information related to the operation of the processor 202. For example, the memory 204 may store software codes including commands for executing part or all of the processes controlled by the processor 202 or for executing the description, functions, processes, proposals, methods, and / or operation flowcharts disclosed in this document. Herein, 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 radio signals through one or more antennas 208. Each transceiver 206 may include a transmitter and / or a receiver. The transceiver 206 may be used interchangeably with an RF unit. In this embodiment, the wireless device may represent a communication modem / circuit / chip.

[0246] In the following, the hardware elements of the wireless devices 100 and 200 will be described in more detail. One or more protocol layers may be implemented by (but not limited to) one or more processors 102 and 202. For example, one or more processors 102 and 202 may implement one or more layers (e.g., functional layers such as PHY, MAC, RLC, PDCP, RRC, and SDAP). 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 flowcharts disclosed in this document. 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 flowcharts disclosed in this document. 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 description, functions, procedures, proposals, methods, and / or operational flowcharts disclosed in this document, and provide the generated signal to one or more transceivers 106 and 206. One or more processors 102 and 202 may receive a signal (e.g., a baseband signal) from one or more transceivers 106 and 206 and obtain the PDU, SDU, message, control information, data, or information according to the description, functions, procedures, proposals, methods, and / or operational flowcharts disclosed in this document.

[0247] One or more processors 102 and 202 may be referred to as controllers, microcontrollers, microprocessors, or microcomputers. One or more processors 102 and 202 may be implemented by hardware, firmware, software, or a combination thereof. As an example, one or more application specific integrated circuits (ASICs), one or more digital signal processors (DSPs), one or more digital signal processing devices (DSPDs), one or more programmable logic devices (PLDs), or one or more field programmable gate arrays (FPGAs) may be included in one or more processors 102 and 202. The descriptions, functions, processes, proposals, methods, and / or operational flow charts 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. Firmware or software configured to execute the descriptions, functions, processes, proposals, methods, and / or operational flow charts disclosed in this document may be included in one or more processors 102 and 202 or stored in one or more memories 104 and 204 to be driven by one or more processors 102 and 202. The descriptions, functions, processes, proposals, methods and / or operational flow charts disclosed in this document may be implemented in the form of codes, commands and / or command sets using firmware or software.

[0248] One or more memories 104 and 204 may 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 may be configured by read-only memory (ROM), random access memory (RAM), electrically erasable programmable read-only memory (EPROM), flash memory, hard disk drive, register, cache memory, computer-readable storage medium and / or a combination thereof. One or more memories 104 and 204 may be located inside and / or outside of one or more processors 102 and 202. One or more memories 104 and 204 may be connected to one or more processors 102 and 202 by various technologies such as wired or wireless connections.

[0249] One or more transceivers 106 and 206 may send user data, control information and / or radio signals / channels mentioned in the method and / or operation flow chart of this document to one or more other devices. One or more transceivers 106 and 206 may receive user data, control information and / or radio signals / channels mentioned in the description, function, process, proposal, method and / or operation flow chart 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 send and receive radio signals. For example, one or more processors 102 and 202 may perform control so that one or more transceivers 106 and 206 may send user data, control information or radio signals to one or more other devices. One or more processors 102 and 202 may perform control so that one or more transceivers 106 and 206 may receive user data, control information or radio signals from one or more other devices. One or more transceivers 106 and 206 may be connected to one or more antennas 108 and 208, and one or more transceivers 106 and 206 may be configured to send and receive user data, control information and / or radio signals / channels mentioned in the description, functions, processes, proposals, methods and / or operation flow charts disclosed in this document through one or more antennas 108 and 208. In this document, one or more antennas may be multiple physical antennas or multiple logical antennas (e.g., antenna ports). One or more transceivers 106 and 206 may convert received radio signals / channels, etc. from RF band signals to baseband signals so as to process received user data, control information, radio signals / channels, etc. using one or more processors 102 and 202. One or more transceivers 106 and 206 may convert user data, control information, radio signals / channels, etc. processed using one or more processors 102 and 202 from baseband signals to RF band signals. To this end, one or more of the transceivers 106 and 206 may include (analog) oscillators and / or filters.

[0250] Fig.11 2 shows other exemplary wireless devices to which this embodiment is applied. The wireless device may be configured to receive the wireless signal according to the usage / service (see Fig. 9 ) are implemented in various forms.

[0251] Reference Fig.11 , the wireless devices 100 and 200 may correspond to Fig.10The wireless devices 100 and 200 of the present invention may be configured by various elements, components, units / parts 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 an additional component 140. The communication unit may include a communication circuit 112 and a transceiver 114. For example, the communication circuit 112 may include Fig.10 One or more processors 102 and 202 and / or one or more memories 104 and 204. For example, the transceiver 114 may include Fig.10 The control unit 120 is electrically connected to the communication unit 110, the memory unit 130, and the additional components 140, and controls the overall operation of the wireless device. For example, the control unit 120 may control the electrical / mechanical operation of the wireless device based on the program / code / command / information stored in the memory unit 130. The control unit 120 may transmit information stored in the memory unit 130 to the outside (e.g., other communication devices) via the communication unit 110 through a wireless / wired interface, or store information received from the outside (e.g., other communication devices) via the communication unit 110 in the memory unit 130 through a wireless / wired interface.

[0252] The additional components 140 may be configured differently depending on the type of wireless device. For example, the additional components 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 in the form of, but not limited to, a robot ( Fig. 9 100a), vehicles ( Fig. 9 100b-1 and 100b-2), XR devices ( Fig. 9 100c), handheld device ( Fig. 9 100d), household appliances ( Fig. 9 100e), IoT devices ( Fig. 9 100f), digital broadcasting terminal, holographic device, public safety device, MTC device, medical device, fintech device (or financial device), security device, climate / environmental device, AI server / device ( Fig. 9 400), BS( Fig. 9 200), network nodes, etc. The wireless device can be used in a mobile or fixed location according to the usage example / service.

[0253] exist Fig.11In the wireless devices 100 and 200, various elements, components, units / parts and / or modules in the wireless devices 100 and 200 may all be connected to each other through a wired interface, or at least a part thereof may be wirelessly connected 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 may be wired, and the control unit 120 and the first unit (e.g., 130 and 140) may be wirelessly connected through the communication unit 110. The various elements, components, units / parts and / or modules within the wireless devices 100 and 200 may also include one or more elements. For example, the control unit 120 may be configured by a collection of one or more processors. As an example, the control unit 120 may be configured by a collection of a communication control processor, an application processor, an electronic control unit (ECU), a graphics processing unit and a memory control processor. As another example, the memory unit 130 may be configured by a random access memory (RAM), a dynamic RAM (DRAM), a read-only memory (ROM)), a flash memory, a volatile memory, a non-volatile memory and / or a combination thereof.

[0254] Fig.12 An exemplary vehicle or autonomous driving vehicle to which the present embodiment is applied is shown. The vehicle or autonomous driving vehicle may be implemented as a mobile robot, a car, a train, a manned / unmanned aerial vehicle (AV), a ship, etc.

[0255] One or more memories 104 and 204 may 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 may be configured by read-only memory (ROM), random access memory (RAM), electrically erasable programmable read-only memory (EPROM), flash memory, hard disk drive, register, cache memory, computer-readable storage medium and / or a combination thereof. One or more memories 104 and 204 may be located inside and / or outside of one or more processors 102 and 202. One or more memories 104 and 204 may be connected to one or more processors 102 and 202 by various technologies such as wired or wireless connections.

[0256] One or more transceivers 106 and 206 may send user data, control information and / or radio signals / channels mentioned in the method and / or operation flow chart of this document to one or more other devices. One or more transceivers 106 and 206 may receive user data, control information and / or radio signals / channels mentioned in the description, function, process, proposal, method and / or operation flow chart 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 send and receive radio signals. For example, one or more processors 102 and 202 may perform control so that one or more transceivers 106 and 206 may send user data, control information or radio signals to one or more other devices. One or more processors 102 and 202 may perform control so that one or more transceivers 106 and 206 may receive user data, control information or radio signals from one or more other devices. One or more transceivers 106 and 206 may be connected to one or more antennas 108 and 208, and one or more transceivers 106 and 206 may be configured to send and receive user data, control information and / or radio signals / channels mentioned in the description, functions, processes, proposals, methods and / or operation flow charts disclosed in this document through one or more antennas 108 and 208. In this document, one or more antennas may be multiple physical antennas or multiple logical antennas (e.g., antenna ports). One or more transceivers 106 and 206 may convert received radio signals / channels, etc. from RF band signals to baseband signals so as to process received user data, control information, radio signals / channels, etc. using one or more processors 102 and 202. One or more transceivers 106 and 206 may convert user data, control information, radio signals / channels, etc. processed using one or more processors 102 and 202 from baseband signals to RF band signals. To this end, one or more of the transceivers 106 and 206 may include (analog) oscillators and / or filters.

[0257] Fig.11 2 shows other exemplary wireless devices to which this embodiment is applied. The wireless device may be configured to receive the wireless signal according to the usage / service (see Fig. 9 ) are implemented in various forms.

[0258] Reference Fig.11 , the wireless devices 100 and 200 may correspond to Fig.10The wireless devices 100 and 200 of the present invention may be configured by various elements, components, units / parts 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 an additional component 140. The communication unit may include a communication circuit 112 and a transceiver 114. For example, the communication circuit 112 may include Fig.10 One or more processors 102 and 202 and / or one or more memories 104 and 204. For example, the transceiver 114 may include Fig.10 The control unit 120 is electrically connected to the communication unit 110, the memory unit 130, and the additional components 140, and controls the overall operation of the wireless device. For example, the control unit 120 may control the electrical / mechanical operation of the wireless device based on the program / code / command / information stored in the memory unit 130. The control unit 120 may transmit information stored in the memory unit 130 to the outside (e.g., other communication devices) via the communication unit 110 through a wireless / wired interface, or store information received from the outside (e.g., other communication devices) via the communication unit 110 in the memory unit 130 through a wireless / wired interface.

[0259] The additional components 140 may be configured differently depending on the type of wireless device. For example, the additional components 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 in the form of, but not limited to, a robot ( Fig. 9 100a), vehicles ( Fig. 9 100b-1 and 100b-2), XR devices ( Fig. 9 100c), handheld device ( Fig. 9 100d), household appliances ( Fig. 9 100e), IoT devices ( Fig. 9 100f), digital broadcasting terminal, holographic device, public safety device, MTC device, medical device, fintech device (or financial device), security device, climate / environmental device, AI server / device ( Fig. 9 400), BS( Fig. 9 200), network nodes, etc. The wireless device can be used in a mobile or fixed location according to the usage example / service.

[0260] exist Fig.11In the wireless devices 100 and 200, various elements, components, units / parts and / or modules in the wireless devices 100 and 200 may all be connected to each other through a wired interface, or at least a part thereof may be wirelessly connected 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 may be wired, and the control unit 120 and the first unit (e.g., 130 and 140) may be wirelessly connected through the communication unit 110. The various elements, components, units / parts and / or modules within the wireless devices 100 and 200 may also include one or more elements. For example, the control unit 120 may be configured by a collection of one or more processors. As an example, the control unit 120 may be configured by a collection of a communication control processor, an application processor, an electronic control unit (ECU), a graphics processing unit and a memory control processor. As another example, the memory unit 130 may be configured by a random access memory (RAM), a dynamic RAM (DRAM), a read-only memory (ROM)), a flash memory, a volatile memory, a non-volatile memory and / or a combination thereof.

[0261] Fig.12 An exemplary vehicle or autonomous driving vehicle to which the present embodiment is applied is shown. The vehicle or autonomous driving vehicle may be implemented as a mobile robot, a car, a train, a manned / unmanned aerial vehicle (AV), a ship, etc.

[0262] Reference Fig.12 , the vehicle or autonomous driving vehicle 100 may include an antenna unit 108, a communication unit 110, a control unit 120, a drive unit 140a, a power supply unit 140b, a sensor unit 140c, and an autonomous driving unit 140d. The antenna unit 108 may be configured as a part of the communication unit 110. Blocks 110 / 130 / 140a to 140d correspond to Fig.11 Block 110 / 130 / 140.

[0263] The communication unit 110 may send and receive signals (e.g., data and control signals) to and from external devices such as other vehicles, BSs (e.g., gNBs and roadside units), and servers. The control unit 120 may perform various operations by controlling elements of the vehicle or autonomous vehicle 100. The control unit 120 may include an electronic control unit (ECU). The drive unit 140a may enable the vehicle or autonomous vehicle 100 to travel on a road. The drive unit 140a may include an engine, a motor, a power system, wheels, brakes, a steering device, etc. The power supply unit 140b may supply power to the vehicle or autonomous vehicle 100, and include a wired / wireless charging circuit, a battery, etc. The sensor unit 140c may obtain vehicle status, surrounding environment information, user information, etc. The sensor unit 140c 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 position module, a vehicle forward / backward sensor, a battery sensor, a fuel sensor, a tire sensor, a steering sensor, a temperature sensor, a depth sensor, an ultrasonic sensor, a lighting sensor, a pedal position sensor, etc. The autonomous driving unit 140d may implement a technology for maintaining a lane in which the vehicle is traveling, a technology for automatically adjusting a speed (e.g., adaptive cruise control), a technology for autonomously traveling along a determined path, a technology for traveling by automatically setting a path if a destination is set, and the like.

[0264] For example, the communication unit 110 may receive map data, traffic information data, etc. from an external server. The autonomous driving unit 140d may generate an autonomous driving path and a driving plan from the obtained data. The control unit 120 may control the drive unit 140a so that the vehicle or the autonomous driving vehicle 100 may move along the autonomous driving path according to the driving plan (e.g., speed / direction control). In the middle of autonomous driving, the communication unit 110 may aperiodically / periodically obtain the latest traffic information data from the external server and obtain surrounding traffic information data from neighboring vehicles. In the middle of autonomous driving, the sensor unit 140c may obtain vehicle status and / or surrounding environment information. The autonomous driving unit 140d may update the autonomous driving path and driving plan based on the newly obtained data / information. The communication unit 110 may transmit information about the vehicle position, autonomous driving path, and / or driving plan to an external server. The external server may predict traffic information data based on information collected from the vehicle or autonomous driving vehicle using AI technology, etc., and provide the predicted traffic information data to the vehicle or autonomous driving vehicle.

[0265] Those skilled in the art will appreciate that, without departing from the spirit and basic characteristics of the present embodiment, the present embodiment may be implemented in other specific forms other than those described herein. Therefore, the above-mentioned embodiments should be interpreted as being illustrative in all respects, rather than restrictive. The scope of the present disclosure should be determined by the attached claims and their legal equivalents, rather than by the above description, and all changes falling within the meaning and equivalent scope of the attached claims are intended to be included therein. It is obvious to those skilled in the art that claims that are not explicitly referenced to each other in the attached claims may be presented as an embodiment combination, or included as a new claim by subsequent amendments after the application is submitted.

[0266] It will be apparent to those skilled in the art that the present disclosure may be specifically implemented in other specific forms without departing from the scope of the present disclosure. Therefore, the above detailed description should not be interpreted as being restrictive in all aspects, but should be regarded as illustrative. The scope of the present disclosure should be determined by the reasonable interpretation of the attached claims, and all changes within the equivalent scope of the present disclosure are intended to be included within the scope of the present disclosure.

[0267] Industrial Applicability

[0268] The present disclosure is applicable to UE, BS or other devices in a wireless mobile communication system.

Claims

1. A method performed by a user equipment UE in a wireless communication system, the method comprising the following steps: determining a first transmission power for a first uplink channel; determining a second transmission power for a second uplink channel; sending the first uplink channel to a base station BS at the first transmission power based on a first uplink grant; as well as transmitting the second uplink channel to the BS at the second transmission power based on a second uplink grant, Wherein, the method comprises the following steps: Based on simultaneous transmission of the first uplink channel and the second uplink channel to the BS, selecting a transmission power from among the first transmission power and the second transmission power based on a first control resource set CORESET index related to the first uplink grant and a second CORESET index related to the second uplink grant; and The selected transmission power is reduced so that the sum of the first transmission power and the second transmission power meets the maximum transmission power of the UE.

2. The method according to claim 1, wherein: Based on that at least one of the first uplink grant and the second uplink grant is a type 1 configuration grant CG, a sounding reference signal SRS resource index related to the corresponding uplink grant is regarded as a CORESET index related to the corresponding uplink grant.

3. The method according to claim 1, wherein: Based on that at least one of the first uplink grant and the second uplink grant is a type 2 configuration grant CG, a CORESET index related to the type 2 CG is an index of a CORESET that receives downlink control information including an activation indicator of the type 2 CG.

4. The method according to claim 1, wherein: A transmission power of an uplink channel to be transmitted based on an uplink grant related to a higher CORESET index between the first CORESET index and the second CORESET index is selected among the first transmission power and the second transmission power.

5. The method according to claim 1, comprising the steps of: Based on the selected transmission power being reduced to the minimum transmission power, another transmission power is reduced.

6. A user equipment UE 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: determining a first transmission power for a first uplink channel; determining a second transmission power for a second uplink channel; sending the first uplink channel to a base station BS at the first transmission power based on a first uplink grant; and transmitting the second uplink channel to the BS at the second transmission power based on a second uplink grant, The operations include: Based on simultaneous transmission of the first uplink channel and the second uplink channel to the BS, selecting a transmission power from among the first transmission power and the second transmission power based on a first control resource set CORESET index related to the first uplink grant and a second CORESET index related to the second uplink grant; and The selected transmission power is reduced so that the sum of the first transmission power and the second transmission power meets the maximum transmission power of the UE.

7. The UE according to claim 6, wherein: Based on that at least one of the first uplink grant and the second uplink grant is a type 1 configuration grant CG, a sounding reference signal SRS resource index related to the corresponding uplink grant is regarded as a CORESET index related to the corresponding uplink grant.

8. The UE according to claim 6, wherein: Based on that at least one of the first uplink grant and the second uplink grant is a type 2 configuration grant CG, a CORESET index related to the type 2 CG is an index of a CORESET that receives downlink control information including an activation indicator of the type 2 CG.

9. The UE according to claim 6, wherein: A transmission power of an uplink channel to be transmitted based on an uplink grant related to a higher CORESET index between the first CORESET index and the second CORESET index is selected among the first transmission power and the second transmission power.

10. The UE according to claim 6, wherein: The operations include reducing another transmission power based on the selected transmission power being reduced to a minimum transmission power.

11. A processing device in a wireless communication system, the processing device comprising: at least one processor; as well as at least one computer memory operatively connected to the at least one processor and storing instructions which, when executed, cause the at least one processor to perform operations for a user equipment (UE), the operations comprising: determining a first transmission power for a first uplink channel; determining a second transmission power for a second uplink channel; sending the first uplink channel to a base station BS at the first transmission power based on a first uplink grant; and transmitting the second uplink channel to the BS at the second transmission power based on a second uplink grant, The operations include: Based on simultaneous transmission of the first uplink channel and the second uplink channel to the BS, selecting a transmission power from among the first transmission power and the second transmission power based on a first control resource set CORESET index related to the first uplink grant and a second CORESET index related to the second uplink grant; and The selected transmission power is reduced so that the sum of the first transmission power and the second transmission power meets the maximum transmission power of the UE.

12. A computer-readable storage medium configured to store at least one program code comprising instructions, wherein when the instructions are executed, at least one processor performs operations for a user equipment (UE), the operations comprising: determining a first transmission power for a first uplink channel; determining a second transmission power for a second uplink channel; sending the first uplink channel to a base station BS at the first transmission power based on a first uplink grant; as well as transmitting the second uplink channel to the BS at the second transmission power based on a second uplink grant, The operations include: Based on simultaneous transmission of the first uplink channel and the second uplink channel to the BS, selecting a transmission power from among the first transmission power and the second transmission power based on a first control resource set CORESET index related to the first uplink grant and a second CORESET index related to the second uplink grant; and The selected transmission power is reduced so that the sum of the first transmission power and the second transmission power meets the maximum transmission power of the UE.

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