Method and apparatus for transmitting and receiving signal in wireless communication system

Abstract

A terminal according to at least one of embodiments disclosed in the present specification receives a channel state information (CSI) report configuration via higher layer signaling, receives downlink control information (DCI) including information for a CSI request via a physical downlink control channel (PDCCH), and transmits a CSI report related to the CSI request on the basis of satisfaction of a condition for a valid CSI report, wherein, on the basis of the CSI report configuration including a list of sub-configurations, the terminal may determine a Z value and a Z' value for determining whether the condition for a valid CSI report is satisfied only on the basis of on some of the (Z, Z')-candidate values.

Description

Method and device for transmitting and receiving signals in a wireless communication system

[0001] The present disclosure relates to a wireless communication system, and more particularly, to a method and device for transmitting or receiving an uplink / downlink wireless signal in a wireless communication system.

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

[0003] Energy conservation at base stations is a key consideration in wireless communication systems, including 3GPP, as it can contribute to building eco-friendly networks by reducing carbon emissions and reducing operational expenditures (OPEX) for telecommunications providers. In particular, the introduction of 5G communications requires higher data rates, necessitating base stations to be equipped with more antennas and provide services across wider bandwidths and frequency bands. Consequently, the energy costs associated with these services are reaching up to 20% of total OPEX. Against this backdrop, network energy savings (NES) are being discussed in wireless communication standardization, including 3GPP NR.

[0004] The technical task of the present disclosure is to provide a method and a device for efficiently performing a wireless signal transmission and reception process. For example, a method and a device for more efficiently transmitting and receiving CSI reports in an environment that supports a CSI reporting configuration including one or more sub-configurations for an NES may be provided.

[0005] The technical tasks to be achieved are not limited to the technical tasks mentioned above, and other technical tasks not mentioned can be inferred from the description below.

[0006] According to one aspect of the present disclosure, a method performed by a terminal comprises: receiving a CSI (channel state information) report configuration via upper layer signaling; receiving DCI (downlink control information) including information for a CSI request via a PDCCH (physical downlink control channel); And transmitting a CSI report related to the CSI request based on the satisfaction of a condition for a valid CSI report, wherein the terminal determines whether the condition for the valid CSI report is satisfied based on a Z value and a Z' value, wherein the Z value is related to a time length from the last symbol of the PDCCH to the first symbol of the CSI report, and the Z' value is related to a time length from the last symbol of a CSI-RS resource to the first symbol of the CSI report, and wherein the CSI report configuration includes a list of sub-configurations for individually configuring at least one of a CSI codebook, an enablement of a CSI-RS (channel state information-reference signal) antenna port subset, a CSI-RS resource subset, or power offset information for each sub-configuration, wherein the terminal: determines the Z value and the Z' value based on only some of the (Z, Z')-candidate values ​​among a plurality of (Z, Z')-candidate values.

[0007] Based on the above CSI reporting configuration including the list of the sub-configurations, the terminal can determine the Z value and the Z' value only based on the third (Z, Z')-candidate values, excluding the first (Z, Z')-candidate values ​​and the second (Z, Z')-candidate values ​​for each of a plurality of conditions related to CSI, which are not more than 4 CSI-RS ports for a single resource.

[0008] The above multiple conditions include a first condition, and the first condition can be satisfied when (i) a numeral related to subcarrier spacing (SCS) is less than a threshold, (ii) CSI is triggered while 0 CPUs (CSI processing units) are occupied, (iii) a physical uplink shared channel (PUSCH) for transmitting the CSI report does not include any of a transport block or HARQ-ACK, (iv) the CSI report does not include a CRI (CSI-RS Resource Indicator) and has a wideband frequency granularity with a maximum of 4 CSI-RS ports for a single resource or less, and (v) a codebook type is a single panel or a report content is set to cri-RI-CQI (cri-rank indicator-channel quality indicator).

[0009] The above multiple conditions include a second condition, and the second condition can be satisfied when (iv) the CSI report does not include a CRI (CSI-RS Resource Indicator) and has a wideband frequency granularity with a maximum of 4 CSI-RS ports for a single resource or less, and (v) the codebook type is a single panel or the report content is set to cri-RI-CQI (cri-rank indicator-channel quality indicator).

[0010] The above plurality of (Z, Z')-candidate values ​​may include first (Z, Z')-candidate values, second (Z, Z')-candidate values ​​greater than the first (Z, Z')-candidate values ​​for the same numeral, and third (Z, Z')-candidate values ​​greater than the first (Z, Z')-candidate values ​​and the second (Z, Z')-candidate values ​​for the same numeral. Based on the CSI reporting configuration including the list of sub-configurations, the terminal may determine the Z value and the Z' value based only on the third (Z, Z')-candidate values.

[0011] The above Z value may be related to the time length from the end of the last symbol of the PDCCH to the start of the CP (cyclic prefix) of the first symbol of the CSI report, and the above Z' value may be related to the time length from the end of the last symbol of the CSI-RS resource to the start of the CP of the first symbol of the CSI report.

[0012] Based on the above CSI reporting setting including the list of the sub-settings, the terminal can determine the Z value and the Z' value based only on Table A below.

[0013] [Table A]

[0014]

[0015] According to another aspect of the present disclosure, a non-transitory recording medium may be provided that is configured to store instructions that, when executed by a processor of a terminal, cause the terminal to perform the method described above.

[0016] According to another aspect of the present disclosure, a device comprises at least one memory configured to store instructions; and at least one processor configured to perform operations by executing the instructions, wherein the operations performed by the at least one processor include: receiving a channel state information (CSI) reporting configuration via higher layer signaling; receiving downlink control information (DCI) including information for a CSI request via a physical downlink control channel (PDCCH); And transmitting a CSI report related to the CSI request based on the satisfaction of a condition for a valid CSI report, wherein the device determines whether the condition for a valid CSI report is satisfied based on a Z value and a Z' value, wherein the Z value is related to a time length from the last symbol of the PDCCH to the first symbol of the CSI report, and the Z' value is related to a time length from the last symbol of a CSI-RS resource to the first symbol of the CSI report, and wherein the CSI report configuration includes a list of sub-configurations for individually configuring at least one of a CSI codebook, an enablement of a CSI-RS (channel state information-reference signal) antenna port subset, a CSI-RS resource subset, or power offset information for each sub-configuration, wherein the device: determines the Z value and the Z' value based on only some of the (Z, Z')-candidate values ​​among a plurality of (Z, Z')-candidate values.

[0017] The device may further include a transceiver. The device may be a terminal configured to operate in a wireless communication system.

[0018] The above device may be a processing device configured to control a terminal in a wireless communication system.

[0019] According to another aspect of the present disclosure, a method performed by a base station comprises: transmitting a channel state information (CSI) report configuration via upper layer signaling; transmitting downlink control information (DCI) including information for a CSI request via a physical downlink control channel (PDCCH); And receiving a CSI report related to the CSI request based on the satisfaction of a condition for a valid CSI report, wherein it is determined whether the condition for a valid CSI report is satisfied based on a Z value and a Z' value, wherein the Z value is related to a time length from the last symbol of the PDCCH to the first symbol of the CSI report, and the Z' value is related to a time length from the last symbol of a CSI-RS resource to the first symbol of the CSI report, and wherein the CSI report configuration includes a list of sub-configurations for individually configuring at least one of a CSI codebook, an enablement of a CSI-RS (channel state information-reference signal) antenna port subset, a CSI-RS resource subset, or power offset information for each sub-configuration: the Z value and the Z' value can be determined based on only some of the (Z, Z')-candidate values ​​among a plurality of (Z, Z')-candidate values.

[0020] According to another aspect of the present disclosure, a base station comprises at least one memory configured to store instructions; and at least one processor configured to perform operations by executing the instructions, wherein the operations performed by the at least one processor include: transmitting a CSI (channel state information) report configuration via higher layer signaling; transmitting DCI (downlink control information) including information for a CSI request via a PDCCH (physical downlink control channel); And receiving a CSI report related to the CSI request based on the satisfaction of a condition for a valid CSI report, wherein it is determined whether the condition for a valid CSI report is satisfied based on a Z value and a Z' value, wherein the Z value is related to a time length from the last symbol of the PDCCH to the first symbol of the CSI report, and the Z' value is related to a time length from the last symbol of a CSI-RS resource to the first symbol of the CSI report, and wherein the CSI report configuration includes a list of sub-configurations for individually configuring at least one of a CSI codebook, an enablement of a CSI-RS (channel state information-reference signal) antenna port subset, a CSI-RS resource subset, or power offset information for each sub-configuration: the Z value and the Z' value can be determined based on only some of the (Z, Z')-candidate values ​​among a plurality of (Z, Z')-candidate values.

[0021]

[0022] According to one embodiment, the wireless signal transmission and reception process can be performed efficiently. For example, in an environment where a CSI reporting configuration including one or more sub-configurations for an NES is supported, the transmission and reception of CSI reports can be performed more efficiently.

[0023] Other effects not mentioned can be inferred from the description below.

[0024] Figure 1 illustrates physical channels used in a 3GPP system, which is an example of a wireless communication system, and a general signal transmission method using the channels.

[0025] Figure 2 illustrates the structure of a radio frame.

[0026] Figure 3 illustrates a resource grid of slots.

[0027] Figure 4 illustrates an example of physical channels being mapped within a slot.

[0028] Figure 5 illustrates the PDSCH and ACK / NACK transmission process.

[0029] Figure 6 illustrates a PUSCH transmission process.

[0030] Figure 7 shows an example of a CSI-related procedure.

[0031] FIG. 8 is a diagram for explaining CSI calculation time and valid CSI report determination according to one embodiment.

[0032] Figure 9 illustrates an example of the operation of a terminal and a network according to one embodiment.

[0033] FIG. 10 illustrates an example of aperiodic CSI reporting according to one embodiment.

[0034] Figure 11 illustrates a flow of terminal operation according to one embodiment.

[0035] Figure 12 illustrates the flow of base station operation according to one embodiment.

[0036] Figure 13 illustrates a communication system applicable to the present disclosure.

[0037] Figure 14 illustrates a wireless device applicable to the present disclosure.

[0038] The following technologies can be used in various wireless access systems, such as CDMA (code division multiple access), FDMA (frequency division multiple access), TDMA (time division multiple access), OFDMA (orthogonal frequency division multiple access), and SC-FDMA (single carrier frequency division multiple access). CDMA can be implemented with radio technologies such as UTRA (Universal Terrestrial Radio Access) or CDMA2000. TDMA can be implemented with radio technologies such as GSM (Global System for Mobile communications) / GPRS (General Packet Radio Service) / EDGE (Enhanced Data Rates for GSM Evolution). OFDMA can be implemented with radio technologies such as IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802-20, and E-UTRA (Evolved UTRA). UTRA is a part of UMTS (Universal Mobile Telecommunications System). 3GPP (3rd Generation Partnership Project) LTE (long term evolution) is part of E-UMTS (Evolved UMTS) that uses E-UTRA, and LTE-A (Advanced) is an evolved version of 3GPP LTE. 3GPP NR (New Radio or New Radio Access Technology) is an evolved version of 3GPP LTE / LTE-A.

[0039] As more and more communication devices demand greater communication capacity, the need for improved mobile broadband communications compared to existing Radio Access Technology (RAT) is emerging. Furthermore, massive Machine Type Communications (MTC), which connects multiple devices and objects to provide diverse services anytime, anywhere, is also a key issue to be considered in next-generation communications. Furthermore, communication system design that considers reliability and latency-sensitive services / terminals is being discussed. Accordingly, the introduction of next-generation RATs that consider enhanced Mobile BroadBand Communication (eMBB), massive MTC, and Ultra-Reliable and Low Latency Communication (URLLC) is being discussed. For convenience, this technology is referred to as NR (New Radio or New RAT) in the present invention.

[0040] For clarity of explanation, the description will focus on 3GPP NR, but the technical idea of ​​the present invention is not limited thereto.

[0041] In this specification, the expression "setting" can be replaced with the expression "configure / configuration", and the two can be used interchangeably. In addition, conditional expressions (e.g., "if", "in a case", or "when", etc.) can be replaced with the expression "based on that ~~" or "in a state / status". In addition, the operation of the terminal / base station or the SW / HW configuration according to the satisfaction of the condition can be inferred / understood. In addition, if the process of the receiving (or transmitting) side can be inferred / understood from the process of the transmitting (or receiving) side in signal transmission / reception between wireless communication devices (e.g., base stations, terminals), the description thereof can be omitted. For example, signal determination / generation / encoding / transmission, etc. of the transmitting side can be understood as signal monitoring reception / decoding / determination, etc. of the receiving side. In addition, the expression that the terminal performs (or does not perform) a specific operation can also be interpreted as meaning that the base station operates while expecting / assuming (or expecting / assuming that the terminal does not perform) the specific operation. In addition, the expression that the base station performs (or does not perform) a specific operation can also be interpreted as meaning that the terminal operates while expecting / assuming (or expecting / assuming that the base station does not perform) the specific operation. In addition, the division and index of each section, embodiment, example, option, method, plan, etc. in the following description are for the convenience of explanation and should not be interpreted as meaning that each constitutes an independent invention or that each must be implemented only individually. In addition, in describing each section, embodiment, example, option, method, plan, etc., if there is no explicitly conflicting / opposing description, it can be inferred / interpreted that at least some of them can be combined and implemented together, or at least some can be implemented with the omission of each.

[0042] In a wireless communication system, a terminal receives information from a base station via the downlink (DL) and transmits it to the base station via the uplink (UL). The information transmitted and received between the base station and the terminal includes data and various control information, and various physical channels exist depending on the type and purpose of the information being transmitted and received.

[0043] Figure 1 is a drawing for explaining physical channels used in a 3GPP NR system and a general signal transmission method using them.

[0044] When a terminal is powered on again from a powered-off state or enters a new cell, it performs an initial cell search operation, such as synchronizing with the base station, in step S101. To this end, the terminal receives a Synchronization Signal Block (SSB) from the base station. The SSB includes a Primary Synchronization Signal (PSS), a Secondary Synchronization Signal (SSS), and a Physical Broadcast Channel (PBCH). Based on the PSS / SSS, the terminal synchronizes with the base station and obtains information such as a cell ID (cell identity). In addition, the terminal can obtain broadcast information within the cell based on the PBCH. Meanwhile, the terminal can check the downlink channel status by receiving a Downlink Reference Signal (DL RS) during the initial cell search phase.

[0045] After completing the initial cell search, the terminal can obtain more specific system information by receiving a physical downlink control channel (PDCCH) and a physical downlink shared channel (PDSCH) based on the physical downlink control channel information in step S102.

[0046] Thereafter, the terminal may perform a random access procedure such as steps S103 to S106 to complete connection to the base station. To this end, the terminal may transmit a preamble through a physical random access channel (PRACH) (S103) and receive a response message to the preamble through a physical downlink control channel and a corresponding physical downlink shared channel (S104). In the case of contention-based random access, a contention resolution procedure such as transmission of an additional physical random access channel (S105) and reception of a physical downlink control channel and a corresponding physical downlink shared channel (S106) may be performed.

[0047] The terminal that has performed the procedure as described above can then perform the general uplink / downlink signal transmission procedure, such as receiving a physical downlink control channel / physical downlink shared channel (S107) and transmitting a physical uplink shared channel (PUSCH) / physical uplink control channel (PUCCH) (S108). The control information that the terminal transmits to the base station is collectively referred to as uplink control information (UCI). UCI includes HARQ ACK / NACK (Hybrid Automatic Repeat and request Acknowledgement / Negative-ACK), SR (Scheduling Request), CSI (Channel State Information), etc. CSI includes CQI (Channel Quality Indicator), PMI (Precoding Matrix Indicator), RI (Rank Indication), etc. UCI is generally transmitted through PUCCH, but can be transmitted through PUSCH when control information and traffic data must be transmitted simultaneously. Additionally, UCI can be transmitted aperiodically via PUSCH upon request / instruction from the network.

[0048] Figure 2 illustrates the structure of a radio frame. In NR, uplink and downlink transmissions are organized into frames. Each radio frame is 10 ms long and is divided into two 5 ms half-frames (HF). Each half-frame is divided into five 1 ms sub-frames (SF). A sub-frame is divided into one or more slots, and the number of slots within a sub-frame depends on the subcarrier spacing (SCS). Each slot contains 12 or 14 OFDM (Orthogonal Frequency Division Multiplexing) symbols, depending on the cyclic prefix (CP). When a normal CP is used, each slot contains 14 OFDM symbols. When an extended CP is used, each slot contains 12 OFDM symbols.

[0049] Table 1 illustrates that when CP is normally used, the number of symbols per slot, the number of slots per frame, and the number of slots per subframe vary depending on the SCS.

[0050] SCS (15*2^u)N slot symb N frame,u slot N subframe,u slot 15KHz (u=0)1410130KHz (u=1)1420260KHz (u=2)14404120KHz (u=3)14808240KHz (u=4)1416016

[0051] * N slot symb : Number of symbols in the slot

[0052] * N frame,u slot :Number of slots in the frame

[0053] * N subframe,u slot :Number of slots in a subframe

[0054] Table 2 illustrates that when extended CP is used, the number of symbols per slot, the number of slots per frame, and the number of slots per subframe vary depending on the SCS.

[0055] SCS (15*2^u)N slot symb N frame,u slot N subframe,u slot 60KHz (u=2)12404

[0056] The structure of the frame is only an example, and the number of subframes, number of slots, and number of symbols in the frame can be varied.

[0057] In an NR system, OFDM numerology (e.g., SCS) may be set differently between multiple cells that are merged into a single terminal. Accordingly, the (absolute time) interval of a time resource (e.g., SF, slot, or TTI) (conveniently referred to as TU (Time Unit)) consisting of the same number of symbols may be set differently between the merged cells. Here, the symbol may include an OFDM symbol (or CP-OFDM symbol), an SC-FDMA symbol (or Discrete Fourier Transform-spread-OFDM, DFT-s-OFDM symbol).

[0058] Figure 3 illustrates a resource grid of a slot. A slot contains multiple symbols in the time domain. For example, in the case of a regular CP, one slot contains 14 symbols, but in the case of an extended CP, one slot contains 12 symbols. A carrier contains multiple subcarriers in the frequency domain. A Resource Block (RB) is defined as multiple (e.g., 12) consecutive subcarriers in the frequency domain. A Bandwidth Part (BWP) is defined as multiple consecutive Physical RBs (PRBs) in the frequency domain and can correspond to a single numerology (e.g., SCS, CP length, etc.). A carrier can contain up to N (e.g., 5) BWPs. Data communication is performed through activated BWPs, and only one BWP can be activated for a single terminal. Each element in the resource grid is referred to as a Resource Element (RE), to which one complex symbol can be mapped.

[0059] Figure 4 illustrates an example of how physical channels are mapped within a slot. A PDCCH can be transmitted in the DL control region, and a PDSCH can be transmitted in the DL data region. A PUCCH can be transmitted in the UL control region, and a PUSCH can be transmitted in the UL data region. GP provides a time gap between the base station and the terminal when switching from transmission mode to reception mode or from reception mode to transmission mode. Some symbols within a subframe at the time of transition from DL to UL can be set as GP.

[0060] Below, each physical channel is described in more detail.

[0061] The PDCCH carries Downlink Control Information (DCI). For example, the PCCCH (i.e., DCI) carries the transmission format and resource allocation of the downlink shared channel (DL-SCH), resource allocation information for the uplink shared channel (UL-SCH), paging information for the paging channel (PCH), system information on the DL-SCH, resource allocation information for upper layer control messages such as random access responses transmitted on the PDSCH, transmission power control commands, activation / deactivation of Configured Scheduling (CS), etc. The DCI includes a cyclic redundancy check (CRC), which is masked / scrambled with various identifiers (e.g., Radio Network Temporary Identifier, RNTI) depending on the owner or usage of the PDCCH. For example, if the PDCCH is for a specific terminal, the CRC is masked with a terminal identifier (e.g., Cell-RNTI, C-RNTI). If the PDCCH is for paging, the CRC is masked with the Paging-RNTI (P-RNTI). If the PDCCH is for system information (e.g., a System Information Block, SIB), the CRC is masked with the System Information RNTI (SI-RNTI). If the PDCCH is for a random access response, the CRC is masked with the Random Access-RNTI (RA-RNTI).

[0062] The PDCCH consists of 1, 2, 4, 8, or 16 Control Channel Elements (CCEs) depending on the Aggregation Level (AL). A CCE is a logical allocation unit used to provide a PDCCH with a predetermined code rate depending on the radio channel status. A CCE consists of six Resource Element Groups (REGs). A REG is defined as one OFDM symbol and one (P)RB. The PDCCH is transmitted through a Control Resource Set (CORESET). A CORESET is defined as a set of REGs with a given numerology (e.g., SCS, CP length, etc.). Multiple CORESETs for a single UE can overlap in the time / frequency domain. A CORESET can be configured through system information (e.g., Master Information Block, MIB) or UE-specific upper layer (e.g., Radio Resource Control, RRC, layer) signaling. Specifically, the number of RBs and the number of OFDM symbols (up to 3) that constitute the CORESET can be set by upper layer signaling.

[0063] To receive / detect PDCCH, the UE monitors PDCCH candidates. PDCCH candidates represent the CCE(s) that the UE should monitor for PDCCH detection. Each PDCCH candidate is defined as 1, 2, 4, 8, or 16 CCEs depending on the AL. Monitoring involves (blind) decoding the PDCCH candidates. The set of PDCCH candidates that the UE monitors is defined as a PDCCH Search Space (SS). The search space 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 search spaces configured by the MIB or higher-layer signaling. Each CORESET is associated with one or more search spaces, and each search space is associated with one COREST. The search space can be defined based on the following parameters.

[0064] - controlResourceSetId: Indicates the CORESET associated with the search space.

[0065] - monitoringSlotPeriodicityAndOffset: Indicates the PDCCH monitoring period (in slots) and the PDCCH monitoring interval offset (in slots).

[0066] - monitoringSymbolsWithinSlot: Indicates the PDCCH monitoring symbols within the slot (e.g., the first symbol(s) of the CORESET).

[0067] - nrofCandidates: AL={1, 2, 4, 8, 16} indicates the number of PDCCH candidates (one of 0, 1, 2, 3, 4, 5, 6, 8)

[0068] * An opportunity (e.g., time / frequency resource) for monitoring PDCCH candidates is defined as a PDCCH (monitoring) opportunity. One or more PDCCH (monitoring) opportunities can be configured within a slot.

[0069] Table 3 illustrates the characteristics of each search space type.

[0070] TypeSearch SpaceRNTIUse CaseType0-PDCCHCommonSI-RNTI on a primary cellSIB DecodingType0A-PDCCHCommonSI-RNTI on a primary cellSIB DecodingType1-PDCCHCommonRA-RNTI or TC-RNTI on a primary cellMsg2, Msg4 decoding in RACHType2-PDCCHCommonP-RNTI on a primary cellPaging DecodingType3-PDCCHCommonINT-RNTI, SFI-RNTI, TPC-PUSCH-RNTI, TPC-PUCCH-RNTI, TPC-SRS-RNTI, C-RNTI, MCS-C-RNTI, or CS-RNTI(s)UE SpecificUE SpecificC-RNTI, or MCS-C-RNTI, or CS-RNTI(s)User specific PDSCH decoding

[0071] Table 4 illustrates DCI formats transmitted via PDCCH.

[0072] DCI formatUsage0_0Scheduling of PUSCH in one cell0_1Scheduling of PUSCH in one cell1_0Scheduling of PDSCH in one cell1_1Scheduling of PDSCH in one cell2_0Notifying a group of UEs of the slot format2_1Notifying a group of UEs of the PRB(s) and OFDM symbol(s) where UE may assume no transmission is intended for the UE2_2Transmission of TPC commands for PUCCH and PUSCH2_3Transmission of a group of TPC commands for SRS transmissions by one or more UEs

[0073] DCI format 0_0 is used to schedule a TB-based (or TB-level) PUSCH, and DCI format 0_1 ​​can be used to schedule a TB-based (or TB-level) PUSCH or a CBG (Code Block Group)-based (or CBG-level) PUSCH. DCI format 1_0 is used to schedule a TB-based (or TB-level) PDSCH, and DCI format 1_1 can be used to schedule a TB-based (or TB-level) PDSCH or a CBG-based (or CBG-level) PDSCH (DL grant DCI). DCI format 0_0 / 0_1 may be referred to as UL grant DCI or UL scheduling information, and DCI format 1_0 / 1_1 may be referred to as DL grant DCI or DL ​​scheduling information. DCI format 2_0 is used to convey dynamic slot format information (e.g., dynamic SFI) to the terminal, and DCI format 2_1 is used to convey downlink pre-emption information to the terminal. DCI format 2_0 and / or DCI format 2_1 can be conveyed to the terminals within a group through the group common PDCCH, which is a PDCCH conveyed to the terminals defined as a group.

[0074] 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. In the fallback DCI format, the DCI size / field configuration remains the same regardless of the terminal configuration. On the other hand, in the non-fallback DCI format, the DCI size / field configuration varies depending on the terminal configuration.

[0075] PDSCH carries downlink data (e.g., DL-SCH transport block, DL-SCH TB) and applies modulation methods such as Quadrature Phase Shift Keying (QPSK), 16 Quadrature Amplitude Modulation (QAM), 64 QAM, and 256 QAM. TB is encoded to generate a codeword. PDSCH can carry up to two codewords. Scrambling and modulation mapping are performed for each codeword, and modulation symbols generated from each codeword can be mapped to one or more layers. Each layer is mapped to resources along with a Demodulation Reference Signal (DMRS), generated as an OFDM symbol signal, and transmitted through the corresponding antenna port.

[0076] PUCCH carries Uplink Control Information (UCI). UCI includes:

[0077] - SR (Scheduling Request): Information used to request UL-SCH resources.

[0078] - HARQ(Hybrid Automatic Repeat reQuest)-ACK(Acknowledgement): This is a response to a downlink data packet (e.g., codeword) on the PDSCH. It indicates whether the downlink data packet was successfully received. One HARQ-ACK bit can be transmitted in response to a single codeword, and two HARQ-ACK bits can be transmitted in response to two codewords. The HARQ-ACK response includes a positive ACK (simply, ACK), a negative ACK (NACK), a DTX, or a NACK / DTX. Here, HARQ-ACK is used interchangeably with HARQ ACK / NACK and ACK / NACK.

[0079] - CSI (Channel State Information): Feedback information for the downlink channel. MIMO (Multiple Input Multiple Output)-related feedback information includes the Rank Indicator (RI) and Precoding Matrix Indicator (PMI).

[0080] Table 5 illustrates PUCCH formats. Depending on the PUCCH transmission length, they can be classified into Short PUCCH (formats 0 and 2) and Long PUCCH (formats 1, 3, and 4).

[0081] PUCCH formatLength in OFDM symbols N PUCCH symb Number of bitsUsageEtc01 - 2≤2HARQ, SRSequence selection14 - 14≤2HARQ, [SR]Sequence modulation21 - 2>2HARQ, CSI, [SR]CP-OFDM34 - 14>2HARQ, CSI, [SR]DFT-s-OFDM(no UE multiplexing)44 - 14>2HARQ, CSI, [SR]DFT-s-OFDM(Pre DFT OCC)

[0082] PUCCH format 0 carries UCI of up to 2 bits in size and is mapped and transmitted based on sequence. Specifically, the terminal transmits a specific UCI to the base station by transmitting one of multiple sequences through the PUCCH of PUCCH format 0. The terminal transmits the PUCCH of PUCCH format 0 within the PUCCH resources for the corresponding SR configuration only when transmitting a positive SR.

[0083] PUCCH format 1 carries UCI of up to 2 bits in size, and modulation symbols are spread in the time domain using an orthogonal cover code (OCC) (which is set differently depending on whether frequency hopping is used). DMRS are transmitted in symbols where modulation symbols are not transmitted (i.e., transmitted using Time Division Multiplexing (TDM).

[0084] PUCCH format 2 carries UCI with a bit size greater than 2 bits, and modulation symbols are transmitted by frequency division multiplexing (FDM) with DMRS. DM-RSs are located at symbol indices #1, #4, #7, and #10 within a given resource block with a density of 1 / 3. Pseudo Noise (PN) sequences are used for DM_RS sequences. Frequency hopping can be enabled for 2-symbol PUCCH format 2.

[0085] PUCCH format 3 does not multiplex terminals within the same physical resource blocks and carries UCI with a bit size greater than 2 bits. In other words, PUCCH resources in PUCCH format 3 do not include orthogonal cover codes. Modulation symbols are transmitted through time division multiplexing (TDM) with DMRS.

[0086] PUCCH format 4 supports multiplexing of up to four terminals within the same physical resource blocks and carries UCI with a bit size greater than 2 bits. In other words, PUCCH resources in PUCCH format 3 include orthogonal cover codes. Modulation symbols are transmitted through time division multiplexing (TDM) with DMRS.

[0087] At least one of one or more configured cells in a terminal may be configured for PUCCH transmission. At least the primary cell may be configured as a cell for PUCCH transmission. At least one PUCCH cell group may be configured in the terminal based on at least one cell configured for PUCCH transmission, and each PUCCH cell group includes one or more cells. The PUCCH cell group may be simply referred to as a PUCCH group. 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, and the PUCCH-SCell configured for PUCCH transmission belongs to the secondary PUCCH group. For cells belonging to the primary PUCCH group, the PUCCH on the primary cell may be used, and for cells belonging to the secondary PUCCH group, the PUCCH on the PUCCH-SCell may be used.

[0088] PUSCH carries uplink data (e.g., UL-SCH transport block, UL-SCH TB) and / or uplink control information (UCI), and is transmitted based on a CP-OFDM (Cyclic Prefix - Orthogonal Frequency Division Multiplexing) waveform or a DFT-s-OFDM (Discrete Fourier Transform - spread - Orthogonal Frequency Division Multiplexing) waveform. When the PUSCH is transmitted based on a DFT-s-OFDM waveform, the UE transmits the PUSCH by applying transform precoding. For example, when transform precoding is disabled (e.g., transform precoding is disabled), the UE transmits the PUSCH based on the CP-OFDM waveform, and when transform precoding is enabled (e.g., transform precoding is enabled), the UE can transmit the PUSCH based on the CP-OFDM waveform or the DFT-s-OFDM waveform. PUSCH transmissions can be dynamically scheduled by UL grants in DCI, or semi-statically scheduled (configured grant) based on higher layer (e.g., RRC) signaling (and / or Layer 1 (L1) signaling (e.g., PDCCH)). PUSCH transmissions can be performed in a codebook-based or non-codebook-based manner.

[0089] Figure 5 illustrates an ACK / NACK transmission process. Referring to Figure 5, a terminal can detect a PDCCH in slot #n. Here, the PDCCH includes downlink scheduling information (e.g., DCI formats 1_0, 1_1), and the PDCCH indicates a DL assignment-to-PDSCH offset (K0) and a PDSCH-HARQ-ACK reporting offset (K1). For example, DCI formats 1_0, 1_1 can include the following information:

[0090] - Frequency domain resource assignment: Indicates the set of RBs allocated to the PDSCH.

[0091] - Time domain resource assignment: K0 (e.g., slot offset), indicates the starting position of the PDSCH within slot #n+K0 (e.g., OFDM symbol index), and the length of the PDSCH (e.g., number of OFDM symbols).

[0092] - PDSCH-to-HARQ_feedback timing indicator: Indicates K1

[0093] - HARQ process number (4 bits): Indicates the HARQ process ID (Identity) for data (e.g., PDSCH, TB)

[0094] - PUCCH resource indicator (PRI): Indicates the PUCCH resource to be used for UCI transmission among multiple PUCCH resources within the PUCCH resource set.

[0095] Afterwards, the terminal receives PDSCH from slot #(n+K0) according to the scheduling information of slot #n, and when reception of PDSCH is finished in slot #n1 (where, n+K0≤n1), UCI can be transmitted through PUCCH in slot #(n1+K1). Here, UCI may include HARQ-ACK response for PDSCH. In Fig. 5, for convenience, it is assumed that SCS for PDSCH and SCS for PUCCH are the same and slot # n1 = slot #n+K0, but the present invention is not limited thereto. If the SCSs are different, K1 can be indicated / interpreted based on the SCS of PUCCH.

[0096] When the PDSCH is configured to transmit at most 1 TB, the HARQ-ACK response may consist of 1 bit. When the PDSCH is configured to transmit at most 2 TB, the HARQ-ACK response may consist of 2 bits if spatial bundling is not configured, and may consist of 1 bit if spatial bundling is configured. When the HARQ-ACK transmission timing for multiple PDSCHs is designated as slot #(n+K1), the UCI transmitted in slot #(n+K1) includes HARQ-ACK responses for multiple PDSCHs.

[0097] Whether a UE should perform spatial bundling for a HARQ-ACK response can be configured (e.g., via RRC / higher layer signaling) for each cell group. For example, spatial bundling can be individually configured for each HARQ-ACK response transmitted over the PUCCH and / or each HARQ-ACK response transmitted over the PUSCH.

[0098] Spatial bundling can be supported when the maximum number of TBs (or codewords) that can be received at a time (or scheduled via 1 DCI) in the serving cell is 2 (or more than 2) (e.g., when the upper layer parameter maxNrofCodeWordsScheduledByDCI corresponds to 2-TB). Meanwhile, more than 4 layers can be used for 2-TB transmission, and up to 4 layers can be used for 1-TB transmission. Consequently, when spatial bundling is configured for the cell group, spatial bundling can be performed for serving cells that can schedule more than 4 layers among the serving cells in the cell group. On the serving cell, a UE that wishes to transmit a HARQ-ACK response via spatial bundling can generate the HARQ-ACK response by performing a (bit-wise) logical AND operation on the A / N bits for multiple TBs.

[0099] For example, assuming that a terminal receives a DCI scheduling 2 TB and receives 2 TB via PDSCH based on the DCI, the terminal performing spatial bundling can generate a single A / N bit by logically ANDing the first A / N bit for the first TB and the second A / N bit for the second TB. Consequently, if both the first TB and the second TB are ACK, the terminal reports the ACK bit value to the base station, and if either TB is NACK, the terminal reports the NACK bit value to the base station.

[0100] For example, if only 1-TB is actually scheduled on a serving cell configured to receive 2-TB, the terminal can generate a single A / N bit by logically ANDing the A / N bit for the 1-TB with bit value 1. Consequently, the terminal reports the A / N bit for the 1-TB to the base station as is.

[0101] A base station / terminal has multiple parallel DL HARQ processes for DL ​​transmission. These multiple parallel HARQ processes allow DL transmissions to be performed continuously while waiting for HARQ feedback regarding the success or failure of the previous DL transmission. Each HARQ process is associated with a HARQ buffer in the MAC (Medium Access Control) layer. Each DL HARQ process manages state variables such as the number of transmissions of MAC Physical Data Blocks (PDUs) in the buffer, HARQ feedback for MAC PDUs in the buffer, and the current redundancy version. Each HARQ process is identified by a HARQ process ID.

[0102] Figure 6 illustrates a PUSCH transmission process. Referring to Figure 6, a terminal can detect a PDCCH in slot #n. Here, the PDCCH includes uplink scheduling information (e.g., DCI formats 0_0 and 0_1). DCI formats 0_0 and 0_1 can include the following information.

[0103] - Frequency domain resource assignment: Indicates the set of RBs allocated to PUSCH.

[0104] - Time domain resource assignment: Slot offset K2 indicates the starting position (e.g., symbol index) and length (e.g., number of OFDM symbols) of the PUSCH within the slot. The starting symbol and length can be indicated through SLIV (Start and Length Indicator Value) or can be indicated separately.

[0105] Thereafter, the terminal can transmit a PUSCH in slot #(n+K2) according to the scheduling information of slot #n. Here, the PUSCH includes a UL-SCH TB.

[0106] Figure 7 shows an example of a CSI-related procedure.

[0107] The terminal receives configuration information related to CSI from the base station via RRC signaling (710). The configuration information related to CSI may include at least one of CSI-IM (interference management) resource-related information, CSI measurement configuration-related information, CSI resource configuration-related information, CSI-RS resource-related information, or CSI report configuration-related information.

[0108] - CSI-IM resources can be configured for interference measurement (IM) of the terminal. In the time domain, the CSI-IM resource set can be configured periodically, semi-persistently, or aperiodicly. The CSI-IM resources can be configured as Zero Power (ZP)-CSI-RS for the terminal. The ZP-CSI-RS can be configured separately from the Non-Zero Power (NZP)-CSI-RS.

[0109] - The UE may assume that the CSI-RS resource(s) for channel measurement configured for one CSI reporting and the CSI-IM / NZP CSI-RS resource(s) for interference measurement (when NZP CSI-RS resource(s) are used for interference measurement) are in a QCL relationship with respect to 'QCL-TypeD' per resource.

[0110] - The CSI resource configuration may include at least one of a CSI-IM resource for interference measurement, an NZP CSI-RS resource for interference measurement, and an NZP CSI-RS resource for channel measurement. The CMR (channel measurement resource) may be an NZP CSI-RS for CSI acquisition, and the IMR (Interference measurement resource) may be an NZP CSI-RS for CSI-IM and IM.

[0111] - CSI-RS can be configured for one or more terminals. Different CSI-RS configurations may be provided for each terminal, or the same CSI-RS configuration may be provided to multiple terminals. CSI-RS can support up to 32 antenna ports. CSI-RS corresponding to N (N is 1 or greater) antenna ports can be mapped to N RE locations within a time-frequency unit corresponding to one slot and one RB. When N is 2 or greater, N-port CSI-RS can be multiplexed using CDM, FDM, and / or TDM schemes. CSI-RS can be mapped to REs other than REs to which CORESET, DMRS, and SSB are mapped. In the frequency domain, CSI-RS can be configured for the entire bandwidth, a portion of the bandwidth (BWP), or a portion of the bandwidth. CSI-RS may be transmitted in each RB within the bandwidth for which CSI-RS is configured (i.e., density = 1), or in every second RB (e.g., even or odd RB) (i.e., density = 1 / 2). When CSI-RS is used as a Tracking Reference Signal (TRS), a single-port CSI-RS may be mapped on three subcarriers in each resource block (i.e., density = 3). One or more CSI-RS resource sets may be configured for a UE in the time domain. Each CSI-RS resource set may include one or more CSI-RS configurations. Each CSI-RS resource set may be configured periodically, semi-persistently, or aperiodicly.

[0112] - The CSI report configuration may include configurations for feedback type, measurement resources, report type, etc. The NZP-CSI-RS resource set may be used for the CSI report configuration of the corresponding terminal. The NZP-CSI-RS resource set may be associated with CSI-RS or SSB. In addition, multiple periodic NZP-CSI-RS resource sets may be configured as TRS resource sets. (i) The feedback type may include a Channel Quality Indicator (CQI), a Precoding Matrix Indicator (PMI), a CSI-RS Resource Indicator (CRI), an SSB Resource block Indicator (SSBRI), a Layer Indicator (LI), a Rank Indicator (RI), a Layer 1-Reference Signal Received Strength (RSRP), etc. (ii) Measurement resources may include configurations for downlink signals and / or downlink resources on which the terminal performs measurements to determine feedback information. The measurement resources may be configured as ZP and / or NZP CSI-RS resource sets associated with CSI reporting configurations. The NZP CSI-RS resource set may include a CSI-RS set or an SSB set. For example, L1-RSRP may be measured for a CSI-RS set or an SSB set. (iii) Reporting types may include configurations for a time point at which the terminal performs reporting and an uplink channel, etc. The reporting time point may be configured as periodic, semi-persistent, or aperiodic. Periodic CSI reporting may be transmitted on PUCCH. Semi-persistent CSI reporting may be transmitted on PUCCH or PUSCH based on a MAC CE indicating activation / deactivation. Aperiodic CSI reporting may be indicated by DCI signaling.For example, the CSI request field of an uplink grant may indicate one of several report trigger sizes. Aperiodic CSI reports may be transmitted on the PUSCH.

[0113] The terminal measures CSI based on configuration information related to CSI. CSI measurement may include a procedure of receiving a CSI-RS (720) and computing the received CSI-RS to acquire CSI (730).

[0114] The UE can transmit a CSI report to the base station (740). For the CSI report, the time and frequency resources that the UE can use are controlled by the base station. The CSI (channel state information) can include at least one of a channel quality indicator (CQI), a precoding matrix indicator (PMI), a CSI-RS resource indicator (CRI), an SS / PBCH block resource indicator (SSBRI), a layer indicator (LI), a rank indicator (RI), L1-RSRP, and / or L-SINR.

[0115] The time domain behavior of CSI reporting supports periodic, semi-persistent, and aperiodic. i) Periodic CSI reporting is performed on short PUCCH and long PUCCH. The periodicity and slot offset of periodic CSI reporting can be configured by RRC, and refer to the CSI-ReportConfig IE. ii) SP (semi-periodic) CSI reporting is performed on short PUCCH, long PUCCH, or PUSCH. In case of SP CSI on short / long PUCCH, the periodicity and slot offset are configured by RRC, and CSI reporting is activated / deactivated by separate MAC CE / DCI. In case of SP CSI on PUSCH, the periodicity of SP CSI reporting is configured by RRC, but the slot offset is not configured by RRC, and SP CSI reporting is activated / deactivated by DCI (format 0_1). For SP CSI reporting on PUSCH, a separate RNTI (SP-CSI C-RNTI) is used. The initial CSI reporting timing follows the PUSCH time domain allocation value indicated in the DCI, and subsequent CSI reporting timings follow the cycle set by RRC. DCI format 0_1 ​​includes a CSI request field and can activate / deactivate a specific configured SP-CSI trigger state. SP CSI reporting has the same or similar activation / deactivation mechanism as the data transmission mechanism on the SPS PUSCH.iii) Aperiodic CSI reporting is performed on PUSCH and is triggered by DCI. In this case, information related to the triggering of aperiodic CSI reporting can be transmitted / indicated / configured via MAC-CE. For AP CSI with AP CSI-RS, the AP CSI-RS timing is configured by RRC, and the timing for AP CSI reporting is dynamically controlled by DCI.

[0116] CSI enhancement for Network Energy Saving

[0117] To assess the impact of NES (Network Energy Saving) on ​​terminal channel quality when introduced, enhancements to the CSI framework are being discussed at the NR Rel. 18 standardization meeting. Accordingly, this specification discloses various embodiments for CPU (CSI Processing Unit) occupancy and CSI measurement for CSI reporting configured for NES.

[0118] Table 6 is an excerpt of the items to be reflected in the 3GPP TS38.214 document according to the agreement reached in recent NR standardization discussions (R1-2308743).

[0119]

[0120]

[0121]

[0122]

[0123]

[0124]

[0125]

[0126]

[0127] As shown in Table 6 above, one or more sub-configurations can be set within one CSI report configuration, and one or a combination of the following settings can be set within each sub-configuration.

[0128] - A list of IDs of one or more CSI-RS resource(s).

[0129] - antenna port subset indication consisting of a bitmap (i.e., an indication of the antenna port subset to be activated)

[0130] - Additional power offset delta from the EPRE offset between PDSCH and CSI-RS set in the CSI-RS resource configuration

[0131] - CSI Codebook

[0132] For example, when a list of sub-configuration(s) is provided via a CSI report configuration, at least one of the following parameters may be configured for each sub-configuration: (i) a CSI codebook, (ii) a bitmap for enablement of a CSI-RS (channel state information-reference signal) antenna port subset, (iii) a CSI-RS resource subset, and / or (v) a power offset delta.

[0133] For example, according to sub-configuration setting method #1, a first sub-configuration among CSI report configurations may include a {first CSI codebook, a first CSI-RS antenna port subset, a first power offset delta} parameter set, and a second sub-configuration may include a {second CSI codebook, a second CSI-RS antenna port subset, a second power offset delta} parameter set. In this case, each sub-configuration may be associated with all CSI-RS resources of the corresponding CSI report configuration.

[0134] For example, according to sub-configuration setting method #2, a first sub-configuration among the CSI report configurations may include a {first CSI-RS resource subset, first power offset delta} parameter set, and a second sub-configuration may include a {second CSI-RS resource subset, second power offset delta} parameter set. The first CSI-RS resource subset and the second CSI-RS resource subset may each be selected from among the CSI-RS resources included in the CSI report configuration.

[0135] For convenience, a CSI report configuration that includes a sub-configuration in which a list of IDs of one or more CSI-RS resource(s) is set is called type 2 SD (spatial domain) adaptation, a CSI report configuration that includes a sub-configuration in which a bitmapped antenna port subset indication is set is called type 1 SD adaptation, and a CSI report configuration that includes a sub-configuration in which an additional power offset delta value is set is called PD (power domain) adaptation. One or more sub-configuration(s) in a CSI report configuration may include a list of IDs of one or more CSI-RS resource(s) and / or a power offset delta value, in which case it is called type 2 SD + PD adaptation, and a CSI report configuration may include a bitmapped antenna port subset indication and / or a power offset delta value, in which case it is called type 1 SD + PD adaptation.For Type 1 SD or PD or Type 1 SD + PD adaptation, each CSI-RS resource can be associated with all sub-configurations configured in one CSI report configuration, and for Type 2 SD, each CSI-RS resource can be associated with only a single sub-configuration among multiple sub-configurations in one CSI report configuration. For Type 2 SD + PD adaptation, list #1 of CSI-RS resource(s) configured in a sub-configuration in the same CSI report configuration and list #2 of CSI-RS resource(s) configured in another sub-configuration may be identical or disjoint.

[0136] Meanwhile, when L sub-configurations are set in one CSI report configuration, the UE can report CSI information corresponding to each of the L sub-configurations to the base station through one PUSCH / PUCCH. Among the L sub-configurations, only N (N value greater than or equal to 1 below L) sub-configurations can be activated or triggered through MAC-CE or DCI, and in this case, the UE can report CSI information corresponding to each of the N sub-configurations to the base station through one PUSCH / PUCCH. Specifically, for a CSI reporting configuration in which semi-persistent CSI reporting on PUCCH is set, N sub-configuration(s) out of L sub-configurations set through MAC-CE can be activated, and for a CSI reporting configuration in which semi-persistent CSI reporting on PUSCH or aperiodic CSI reporting is set, N sub-configuration(s) out of L sub-configurations set through DCI can be triggered.

[0137] In order for a terminal to calculate / report CSI information corresponding to one or more sub-configuration(s) for one CSI report, we propose a CSI measurement method and a CSI-RS resource / port counting method that take into account the implementation complexity of the terminal.

[0138] [Proposal #1] Counting the number of CSI-RS resources and / or ports when a single CSI-RS resource can be linked to multiple sub-configurations.

[0139] The counting method in the existing NR specification is defined as follows:

[0140] "If a CSI-RS resource is referred N times by one or more CSI Reporting Settings, the CSI-RS resource and the CSI-RS ports within the CSI-RS resource are counted N times."

[0141] That is, if a single CSI-RS resource is associated with multiple CSI reporting settings, the number of CSI-RS resources and ports is counted as the number of CSI reporting settings. The purpose of this counting is that, since the terminal cannot store more than a certain number of resources / ports when storing CSI-RS in memory due to implementation, the base station can receive the number of resources / ports according to the terminal capability and set the CSI reporting setting so as not to exceed the terminal capability based on the counting rule described above.

[0142] As the CSI framework for NES has been enhanced, multiple sub-configurations can be configured within a single CSI reporting setting, and the same CSI-RS resources can be linked to each sub-configuration. Therefore, it became necessary to define a CSI-RS resource / port counting method for these cases.

[0143] First, we would like to propose a CSI-RS resource counting method. When one CSI-RS resource is configured for X CSI reporting settings, and the number of sub-configurations linked to the CSI-RS resource within each CSI reporting setting is defined as N(k), CSI-RS resource counting can be defined as N(1)+N(2)+...+N(X). Here, N(1) refers to the number of sub-configurations linked to the CSI-RS resource in the first CSI-RS reporting setting (where the CSI-RS resource is configured), and N(X) refers to the number of sub-configurations linked to the CSI-RS resource in the Xth CSI-RS reporting setting (where the CSI-RS resource is configured). If there is no sub-configuration configured for the kth CSI-RS reporting setting, the value of N(k) refers to 1. Specifically, the N(k) value, i.e., the number of sub-configurations linked to the CSI-RS resource, may be determined by applying one or a combination of the following alts depending on the terminal's capability, CSI reporting type (e.g., P / SP / AP CSI reporting), or CSI-RS resource type (e.g., P / SP / AP CSI-RS resource).

[0144] - Alt-1: Even if multiple sub-configurations are set or activated for the kth CSI reporting setting (i.e., CSI-ReportConfig), the N(k) value is always considered 1.

[0145] - Alt-2: If multiple (i.e., L) sub-configurations are configured for the kth CSI reporting setting (regardless of how many of the L are actually activated / triggered), the value of N(k) is always considered as L.

[0146] - Alt-3: Even if multiple (i.e., L) sub-configurations are set for the kth CSI reporting setting, if N out of L are actually activated / triggered through MAC-CE or DCI, the N(k) value is considered as N.

[0147] - Alt-4: For the above Alt-2 or Alt-3 or Alt-5 or Alt-6, if there are sub-configurations that differ only in the power offset (between CSI-RS and PDSCH) for the same CSI-RS resource, those sub-configurations are counted as 1. For example, for the configured CSI reporting setting, if Alt-2 is applied, N(k)=4, but in reality, sub-configurations #1 and #2 differ only in the power offset, and sub-configurations #3 and #4 also differ only in the power offset, so in this case, N(k)=2 can be counted. As another example, if only sub-configurations #1 / 2 are activated, if Alt-3 is applied, N(k)=2, but in reality, sub-configurations #1 and #2 differ only in the power offset, so in this case, N(k)=1 can be counted.

[0148] - Alt-5: Multiple (i.e., L) sub-configurations are configured for the k-th CSI reporting setting (especially for SP-CSI reporting on PUSCH or AP-CSI reporting), and only M of the L can be activated via DCI. For example, the CSI reporting setting and (if multiple sub-configurations are configured for the corresponding CSI reporting setting) sub-configuration(s) linked to each code-point of the CSI request field on DCI can be configured / indicated in advance, and the UE can feed back the CSI reporting setting and CSI information corresponding to the sub-configuration(s) linked to the indicated code-point to the base station via the UL channel (e.g., PUSCH). At this time, the maximum number of sub-configurations among all code-points of the CSI request field linked to the k-th CSI reporting setting can be counted as the N(k) value. For example, if the code-points of the CSI request field linked to the kth CSI reporting setting in which a total of 4 sub-configurations are set are '001', '110', and '111', and '001' is linked to 2 sub-configurations in the kth CSI reporting setting, '110' is linked to 1 sub-configuration in the kth CSI reporting setting, and '111' is linked to 3 sub-configurations in the kth CSI reporting setting, then the corresponding N(k) value can be determined as 3.That is, even if 4 sub-configurations are configured, the maximum number of sub-configurations that can be triggered via DCI is 3, so it may be desirable to count only the number of CSI-RS resources corresponding to them. In this example, it is assumed that all 4 sub-configurations are configured to be linked to the CSI-RS resources, such as in type 1 SD and / or PD and / or type 1 + PD adaptation. The same method can be extended and applied to type 2 SD or type 2 SD + PD adaptation. For example, if CSI-RS resource ID#1 is linked only to sub-configuration #0 / 1 among the four sub-configurations, and the code-points of the CSI request field linked to the kth CSI reporting setting in which a total of four sub-configurations are set are '001', '110', and '111', and '001' is linked to two sub-configurations (e.g., sub-configuration #0 / 2) within the kth CSI reporting setting, '110' is linked to one sub-configuration (e.g., sub-configuration #2) within the kth CSI reporting setting, and '111' is linked to three sub-configurations (e.g., sub-configuration #0 / 1 / 2) within the kth CSI reporting setting, then the corresponding N(k) value can be determined as 2.That is, even if 4 sub-configurations are set, since the maximum number of sub-configurations that can be triggered through DCI and linked to the corresponding CSI-RS resource ID#1 is 2 (i.e., since it is linked to sub-configuration #0 / 1 when the code-point of the CSI request field is '111'), it may be desirable to count only the number of CSI-RS resources corresponding thereto. The method can be applied limitedly to P-CSI-RS resources and / or SP-CSI-RS resources (linked to AP-CSI reporting and / or SP-CSI reporting on PUSCH).

[0149] - Alt-6: For the k-th CSI reporting setting, multiple (i.e., L) sub-configurations are configured, and only N of the L can be triggered via DCI (especially for SP-CSI reporting on PUSCH or AP-CSI reporting), and only N of the L can be activated via MAC-CE (especially for SP-CSI reporting on PUCCH). If a specific UE reports capability signaling that it supports at most M sub-configurations that can be activated / triggered, it may be desirable to consider only the maximum number of CSI-RS resources assuming the M as the N(k) value. For example, in case of type 1 SD and / or PD and / or type 1 + PD adaptation, the min(M, "the number of sub-configurations associated with the corresponding CSI-RS resource (i.e., 4)") value can be determined as the N(k) value for the kth CSI reporting setting in which a total of 4 sub-configurations are configured. If M=2, even if 4 sub-configurations are configured, the maximum number of sub-configurations that can be activated and / or triggered via MAC-CE and / or DCI is M=2, so it may be desirable to count only the number of CSI-RS resources corresponding thereto. The same method can be extended and applied to type 2 SD or type 2 SD + PD adaptation.For example, if CSI-RS resource ID#1 is linked only to sub-configuration #0 / 1 among the four pre-defined sub-configurations, the min(M, "the number of sub-configurations linked to the corresponding CSI-RS resource (i.e., 2)") value can be determined as the N(k) value for the corresponding CSI reporting setting. The method can be applied only to P-CSI-RS resource and / or SP-CSI-RS resource (linked to AP-CSI reporting and / or SP-CSI reporting on PUSCH / PUCCH).

[0150] - Alt-7: If a specific CSI-RS resource is called through M sub-configuration(s) out of X sub-configuration(s) belonging to one CSI reporting, as shown in Table B below, the CSI-RS resource can be counted M times. In this case, X can mean the number of sub-configurations set for the corresponding CSI reporting for P / SP-CSI-RS, and can mean the number of sub-configurations activated through DCI among the sub-configuration(s) set for the corresponding CSI reporting for AP-CSI-RS.

[0151] As an example, one of the above alts may be determined depending on the terminal capability.

[0152] Next, we propose a method for counting the number of ports of a CSI-RS resource. When one CSI-RS resource is configured for X CSI reporting settings, and "the number of sub-configurations linked to the corresponding CSI-RS resource within each CSI reporting setting" x "the number of ports configured in the corresponding CSI-RS resource configuration" is defined as N(k), the port counting of the CSI-RS resource can be defined as N(1)+N(2)+ ... +N(X). Here, N(1) means the product of "the number of sub-configurations linked to the CSI-RS resource in the first CSI-RS reporting setting (where the CSI-RS resource is set)" and "the number of ports set in the CSI-RS resource configuration", and N(X) means the product of "the number of sub-configurations linked to the CSI-RS resource in the Xth CSI-RS reporting setting (where the CSI-RS resource is set)" and "the number of ports set in the CSI-RS resource configuration". If there is no sub-configuration set for the kth CSI-RS reporting setting, the N(k) value means "the number of ports set in the CSI-RS resource configuration". Specifically, the N(k) value, i.e., the number of sub-configurations linked to the CSI-RS resource, is determined by the capability of the terminal or the CSI reporting type (e.g., P / SP / AP CSI reporting) or the CSI-RS resource type (e.g., P / SP / AP CSI-RS resource) etc., one of the following alts or a combination thereof can be applied.

[0153] - Alt-A: Even if multiple sub-configurations are set or activated for the kth CSI reporting setting (i.e., CSI-ReportConfig), the N(k) value is always considered as "the number of ports set in the corresponding CSI-RS resource configuration".

[0154] - Alt-B: If multiple (i.e., L) sub-configurations are configured for the kth CSI reporting setting (regardless of how many of the L are actually activated / triggered), the value of N(k) is always considered as the product of L and the "number of ports configured in the corresponding CSI-RS resource configuration".

[0155] - Alt-C: Even if multiple (i.e., L) sub-configurations are configured for the kth CSI reporting setting, if N out of L are actually activated / triggered via MAC-CE or DCI, the N(k) value is considered as the product of N and "the number of ports configured in the corresponding CSI-RS resource configuration".

[0156] - Alt-D: For the above Alt-B or Alt-C, if there are sub-configurations that have different power offsets (between CSI-RS and PDSCH) for the same CSI-RS resource, the sub-configurations can be regarded as a single sub-configuration. For example, for the configured CSI reporting setting, if Alt-B is applied, N(k)=4*16, but in reality, sub-configurations #1 and #2 differ only in power offset, and sub-configurations #3 and #4 also differ only in power offset, so in this case, N(k)=2*16 can be counted. As another example, if only sub-configurations #1 / 2 are activated, if Alt-C is applied, N(k)=2*16, but in reality, sub-configurations #1 and #2 differ only in power offset, so in this case, N(k)=16 can be counted.

[0157] - Alt-E: When applying the above Alt-B or Alt-C or Alt-D or Alt-F, if port subset indication information (i.e., bitmap information for port on / off) is set for a specific sub-configuration, such as in type 1 SD or type 1 SD + PD adaptation, the number of ports set in the corresponding CSI-RS resource configuration can be replaced with the number of ports turned on in the corresponding bitmap information. For example, for the set CSI reporting setting, if Alt-B is applied, N(k)=4*16, but since bitmap information is set for sub-configurations #3 and #4, signaling that only 8 ports are turned on, in this case, N(k)=2*16+2*8 can be counted. As another example, if only sub-configuration #1 / 3 are activated, then if Alt-C is applied, then N(k)=2*16, but in reality, sub-configuration #3 has bitmap information set to signal that only 8 ports are on, so in this case, we can count as N(k)=16+8.

[0158] - Alt-F: Multiple (i.e., L) sub-configurations are configured for the k-th CSI reporting setting (especially for SP-CSI reporting on PUSCH or AP-CSI reporting), and only M of the L can be activated via DCI. For example, the CSI reporting setting linked to each code-point of the CSI request field on DCI and (if multiple sub-configurations are configured for the corresponding CSI reporting setting) the sub-configuration(s) can be configured / indicated in advance, and the UE can feed back the CSI reporting setting linked to the indicated code-point and the CSI information corresponding to the sub-configuration(s) to the base station via the UL channel (e.g., PUSCH). At this time, the N(k) value may be considered as the product of the "maximum number of sub-configurations" and the "number of ports set in the corresponding CSI-RS resource configuration" among all code-points of the CSI request field linked to the kth CSI reporting setting, or the N(k) value may be considered as the maximum value among the "sum of the number of ports in the on state set in the sub-configuration(s) linked to each code-point (or the sum of the number of antenna ports signaled as '1' in the bitmap)" (and the number of ports set in the corresponding CSI-RS resource configuration).For example, a 16-port CSI-RS resource and a total of 4 sub-configurations (sub-configuration#0 has all 16 antenna ports turned on, sub-configuration#1 has only 8 antenna ports turned on, sub-configuration#2 has only 4 antenna ports turned on, and sub-configuration#3 has only 2 antenna ports turned on, which is signaled through antenna port subset indication or bitmap) are configured, and the code-points of the CSI request field associated with the k-th CSI reporting setting are '001', '110', and '111', and '001' is associated with 2 sub-configurations (e.g., sub-configuration#1 / 3) within the k-th CSI reporting setting, '110' is associated with 1 sub-configuration (e.g., sub-configuration#0) within the k-th CSI reporting setting, and '111' is associated with the k-th CSI reporting setting. If it is linked with my 3 sub-configurations (e.g., sub-configuration#1 / 2 / 3), the corresponding N(k) value can be determined as 3*16. That is, even if 4 sub-configurations are set, the maximum number of sub-configurations that can be triggered through DCI is 3, so it may be desirable to count only the number of CSI-RS resource ports corresponding to this.If the N(k) value is considered as the maximum value among the "sum of the number of ports that are set to on in the linked sub-configuration(s) for each code-point (or the sum of the number of antenna ports whose bitmap is signaled as '1')" (and the number of ports set in the corresponding CSI-RS resource configuration) among all code-points of the linked CSI request field in another way, then the N(k) value can be determined as max{8+2, 16, 8+4+2}=16. If the value determined by the max formula is less than the number of ports set in the CSI-RS resource configuration, the final N(k) value can be determined as the number of ports set in the CSI-RS resource configuration. In this example, it is assumed that all four sub-configurations are linked to the above CSI-RS resource, such as type 1 SD and / or PD and / or type 1 + PD adaptation. The same method can be extended and applied to type 2 SD or type 2 SD + PD adaptation. For example, 16-port CSI-RS resource ID#1 is linked to only sub-configuration #0 / 1 among the 4 sub-configurations, and the code-points of the CSI request field linked to the k-th CSI reporting setting, which has a total of 4 sub-configurations, are '001', '110', and '111', and '001' is linked to 2 sub-configurations (e.g., sub-configuration #0 / 2) is linked to '110', 1 sub-configuration (e.g., sub-configuration #2) in the k-th CSI reporting setting is linked to '111', and 3 sub-configurations (e.g., sub-configuration #0 / 1 / 2) in the k-th CSI reporting setting is linked to '111', then the corresponding N(k) value can be determined as 16*2=32. That is, even if 4 sub-configurations are set, since the maximum number of sub-configurations that can be triggered through DCI and linked to the corresponding CSI-RS resource ID#1 is 2 (i.e., since it is linked to sub-configuration #0 / 1 when the code-point of the CSI request field is '111'), it may be desirable to count only the product of the number of CSI-RS resources corresponding to this and the number of antenna ports. The method may be applied only to P-CSI-RS resources and / or SP-CSI-RS resources (linked to AP-CSI reporting and / or SP-CSI reporting on PUSCH).

[0159] - Alt-G: For the k-th CSI reporting setting, multiple (i.e., L) sub-configurations are configured, and only N of the L can be triggered via DCI (especially for SP-CSI reporting on PUSCH or AP-CSI reporting), and only N of the L can be activated via MAC-CE (especially for SP-CSI reporting on PUCCH). If a specific UE reports capability signaling that it supports at most M sub-configurations that can be activated / triggered, it may be desirable to consider only the maximum number of CSI-RS ports assuming the M as the N(k) value. For example, for type 1 SD and / or PD and / or type 1 SD + PD adaptation, assume a k-th CSI reporting setting with a 16-port CSI-RS resource and a total of 4 sub-configurations (sub-configuration#0 with all 16 antenna ports turned on, sub-configuration#1 with only 8 antenna ports turned on, sub-configuration#2 with only 4 antenna ports turned on, and sub-configuration#3 with only 2 antenna ports turned on, which is signaled via antenna port subset indication or bitmap).For the kth CSI reporting setting where a total of 4 sub-configurations are configured, the maximum of the sums of the numbers of antenna ports associated with the min(M, "the number of sub-configurations associated with the corresponding CSI-RS resource (i.e., 4)" sub-configurations can be determined as the N(k) value. If M=2, even if 4 sub-configurations are configured, the maximum number of sub-configurations that can be activated and / or triggered via MAC-CE and / or DCI is M=2, so it may be desirable to count only the maximum number of CSI-RS ports that can correspond to this, which is 16+8=24. If the resulting value is less than the number of antenna ports configured in the CSI-RS resource, the N(k) value can be finally determined as the number of antenna ports configured in the CSI-RS resource. The same method can be extended and applied to the corresponding Type 2 SD or type 2 SD + PD adaptation. For example, if CSI-RS resource ID#1 is linked only to sub-configuration #0 / 1 among the four prerequisite sub-configurations, the product of min(M, "the number of sub-configurations linked to the corresponding CSI-RS resource (i.e., 2)" and the antenna port set for the corresponding CSI-RS resource can be determined as the N(k) value. If the resulting value is less than the number of antenna ports set for the CSI-RS resource, the N(k) value can be finally determined as the number of antenna ports set for the CSI-RS resource.The method may be limited to P-CSI-RS resources and / or SP-CSI-RS resources (linked to AP-CSI reporting and / or SP-CSI reporting on PUSCH / PUCCH).

[0160] - Alt-H: If a specific CSI-RS resource is called through M sub-configuration(s) out of X sub-configuration(s) belonging to one CSI reporting as shown in Table B below, the corresponding CSI-RS port may be counted differently depending on type 1 SD or type 2 SD or PD adaptation. In case of type 1 SD adaptation (or at least one sub-configuration is type 1 SD or type 1 SD + PD adaptation, or at least one sub-configuration has a bitmap-based port subset indication set), max(∑ s=1 M P s,P) CSI-RS ports can be counted as much as the value determined by the formula, where P can mean the number of antenna ports set for the CSI-RS resource, Ps can mean the number of '1's (or the number of antenna ports set to on) in the bitmap signaling the port subset indication set for the sub-configuration index s, and if the bitmap is not set for the corresponding sub-configuration index s, Ps = P. In case of Type 2 SD adaptation or PD adaptation or Type 2 SD + PD adaptation (or when no bitmap-based port subset indication is set for any sub-configuration, or when a CSI-RS resource ID list is set for at least one sub-configuration), CSI-RS ports can be counted as much as the value determined by the formula M x P, where P can mean the number of antenna ports set for the CSI-RS resource. At this time, X may mean the number of sub-configurations set for the corresponding CSI reporting for P / SP-CSI-RS, and may mean the number of sub-configurations activated through DCI among the sub-configuration(s) set for the corresponding CSI reporting for AP-CSI-RS.

[0161] The text proposal reflecting the above Alt-6 and Alt-G may be as shown in Table 7 below. Additionally, for type 1 SD and / or PD and / or type 1 SD + PD adaptation, a configuration constraint was assumed in which a smaller sub-configuration index value enabled more antenna ports.

[0162]

[0163]

[0164]

[0165]

[0166]

[0167] Alternatively, a text proposal reflecting the above Alt-6 and Alt-G may be as shown in Table 8 below.

[0168]

[0169]

[0170] Table 9 is an excerpt of the items to be reflected in the 3GPP TS38.214 document according to the agreement reached in recent NR standardization discussions (R1-2308743).

[0171]

[0172]

[0173]

[0174]

[0175]

[0176]

[0177] Meanwhile, the terminal can report the number of CSI-RS resources that can be simultaneously configured for the CC / BWP or the entire CC / BWP as Y. If it is determined that the CSI-RS resource corresponding to one CSI-RS resource is counted K times (for a CSI report configuration with one or more sub-configurations configured) by utilizing one or a combination of the above alts, and if K is greater than Y, the terminal can expect that the CSI-RS resource is counted only Y times and that only some of the sub-configurations(es) including the CSI-RS resource are triggered / activated via DCI / MAC-CE, etc., so that the CSI-RS resource is counted at most Y times at a specific point in time. The proposal can be applied to the CSI-RS resource linked to SP-CSI and / or AP-CSI reporting.

[0178] Alternatively, the UE may report the number of antenna ports for the CSI-RS resource(s) that can be configured simultaneously for the corresponding CC / BWP or the entire CC / BWP as Y. If one or a combination of the above alts is used to determine that the antenna port corresponding to one CSI-RS resource is counted K times (for a CSI report configuration with one or more sub-configurations configured), and K is greater than Y, the UE may expect that the antenna port for the corresponding CSI-RS resource is counted only Y times and that only some of the sub-configurations(es) including the corresponding CSI-RS resource are triggered / activated via DCI / MAC-CE, etc., so that the number of antenna ports of the CSI-RS resource at a specific point in time is counted at most Y times. The proposal can be applied to CSI-RS resources linked to SP-CSI and / or AP-CSI reporting.

[0179] As an example, one of the above alts may be determined depending on the terminal capability.

[0180] [Proposal #2] How to check CPU usage and CSI processing time for CSI reporting with one or more sub-configurations set

[0181] Table 10 is an excerpt from Table 9 (R1-2308743).

[0182]

[0183]

[0184]

[0185] Condition #1 in the above Table 10 means that when a significant number of conditions are satisfied, {maximum SCS is 120 kHz SCS, aperiodic CSI on CSI-only PUSCH triggered by UL grant, L=0 CPU occupied, number of CSI-RS resources configured in CSI report is one, number of antenna ports configured in the corresponding CSI-RS resource is at most 4, type-1 codebook or non-PMI configuration}, all CPUs will be occupied. If more than one sub-configuration is configured for one CSI report configuration for NES purpose, it may be unclear whether one of the conditions {number of CSI-RS resources configured in the CSI report is one, number of antenna ports configured in the corresponding CSI-RS resource is at most 4} is satisfied.

[0186] First, the following can be considered in determining whether “the number of CSI-RS resources set in the CSI report is one” is satisfied.

[0187] - For Periodic CSI (P-CSI) reporting, the condition "the number of CSI-RS resources configured in the CSI report is one" is considered satisfied only if the sum of the number of CSI-RS resources associated with each of the L sub-configurations configured for the corresponding CSI report configuration, and the N sub-configurations activated / triggered via MAC-CE / DCI for semi-persistent CSI (SP-CSI) or aperiodic CSI (AP-CSI) reporting is one. Specifically, for type 1 SD or PD or type 1 SD + PD adaptation, only a single CSI-RS resource is configured for CMR purposes within the corresponding CSI report configuration, and only a single sub-configuration is configured (for P-CSI reporting) or only a single sub-configuration is activated / triggered (for SP-CSI reporting and / or AP-CSI reporting). Alternatively, for type 2 SD or type 2 SD + PD adaptation, only a single sub-configuration may be configured (for P-CSI reporting) or only a single sub-configuration may be activated / triggered (for SP-CSI reporting and / or AP-CSI reporting) and the number of CSI-RS resources associated with that sub-configuration may be limited to one.

[0188] Similarly, the following may be considered in determining whether “the number of antenna ports set for the corresponding CSI-RS resource is at most 4” is satisfied.

[0189] - For P-CSI reporting, the condition "the number of antenna ports configured for the corresponding CSI-RS resource is at most 4" is considered satisfied only if the number of antenna ports associated with each of the L sub-configurations configured for the corresponding CSI report configuration, and the N sub-configurations activated / triggered via MAC-CE / DCI for SP-CSI or AP-CSI reporting is at most 4. Specifically, for type 1 SD or type 1 SD + PD adaptation, the number of antenna ports (if not configured, the number of antenna ports configured for the associated CSI-RS resource) based on the port subset indication information configured for the configured sub-configuration (for P-CSI reporting) or activated / triggered sub-configuration(s) (for SP-CSI reporting and / or AP-CSI reporting) may be limited to 4 or less. Alternatively, for type 2 SD or PD or type 2 SD + PD adaptation, the number of antenna ports provided through the CSI-RS resource(s) set in the corresponding CSI report configuration may be limited to 4 or less.

[0190] Alternatively, when one or more sub-configurations are set for one CSI report configuration for NES purposes, condition #1 of Table 10 above may not always be satisfied and a constraint may be applied so that only the NES condition is satisfied.

[0191] Table 11 is an excerpt from the existing NR standard document, TS 38.214 v17.6.0.

[0192]

[0193]

[0194]

[0195]

[0196] Referring to Table 11, the terminal determines whether the conditions for valid CSI reporting are satisfied based on the Z value and the Z' value.

[0197] The Z value relates to the time period from the last symbol of the PDCCH that triggers the CSI report to the first symbol of the CSI report. Specifically, the terminal calculates Zref based on the Z value. To satisfy the requirement of a valid CSI report, the time period from the end of the last symbol of the PDCCH that triggers the CSI report to the start of the CP of the first symbol of the CSI report must be at least Zref. Otherwise, the CSI report is not valid, and the terminal may not perform the CSI report requested by the corresponding PDCCH.

[0198] The Z' value relates to the time length from the last symbol of the CSI-RS resource to the first symbol of the CSI report. Specifically, the terminal calculates Z'ref based on the Z' value. To satisfy the requirement of a valid CSI report, the time length from the end of the last symbol of the CSI-RS resource to the start of the CP of the first symbol of the CSI report must be at least Z'ref. Otherwise, the CSI report is not valid, and the terminal may not perform the CSI report.

[0199] Condition #1 of the above Table 11 means that feedback is possible in a relatively fast time when a considerable number of conditions are satisfied: {maximum SCS is 120 kHz SCS, aperiodic CSI on CSI-only PUSCH triggered by UL grant, L=0 CPU occupied, the number of CSI-RS resources set in the CSI report is one, the number of antenna ports set in the corresponding CSI-RS resource is at most 4, type-1 codebook or non-PMI configuration}. In addition, Condition #2 of the above Table 11 means that feedback is possible in a relatively fast time (although a little slower than Condition #1) when the conditions: {wideband CQI / PMI, the number of CSI-RS resources set in the CSI report is one, the number of antenna ports set in the corresponding CSI-RS resource is at most 4, type-1 codebook or non-PMI configuration} are satisfied. If more than one sub-configuration is set for a single CSI report configuration for NES purposes, it may be unclear whether the following conditions are satisfied: {the number of CSI-RS resources set for the CSI report is 1, and the number of antenna ports set for the corresponding CSI-RS resource is at most 4}.

[0200] First, the following can be considered in determining whether “the number of CSI-RS resources set in the CSI report is one” is satisfied.

[0201] - For Periodic CSI (P-CSI) reporting, the condition "the number of CSI-RS resources configured in the CSI report is one" is considered satisfied only if the sum of the number of CSI-RS resources associated with each of the L sub-configurations configured for the corresponding CSI report configuration, and the N sub-configurations activated / triggered via MAC-CE / DCI for semi-persistent CSI (SP-CSI) or aperiodic CSI (AP-CSI) reporting is one. Specifically, for type 1 SD or PD or type 1 SD + PD adaptation, only a single CSI-RS resource is configured for CMR purposes within the corresponding CSI report configuration, and only a single sub-configuration is configured (for P-CSI reporting) or only a single sub-configuration is activated / triggered (for SP-CSI reporting and / or AP-CSI reporting). Alternatively, for type 2 SD or type 2 SD + PD adaptation, only a single sub-configuration may be configured (for P-CSI reporting) or only a single sub-configuration may be activated / triggered (for SP-CSI reporting and / or AP-CSI reporting) and the number of CSI-RS resources associated with that sub-configuration may be limited to one.

[0202] Similarly, the following may be considered in determining whether “the number of antenna ports set for the corresponding CSI-RS resource is at most 4” is satisfied.

[0203] - For P-CSI reporting, the condition "the number of antenna ports configured for the corresponding CSI-RS resource is at most 4" is considered satisfied only if the number of antenna ports associated with each of the L sub-configurations configured for the corresponding CSI report configuration, and the N sub-configurations activated / triggered via MAC-CE / DCI for SP-CSI or AP-CSI reporting is at most 4. Specifically, for type 1 SD or type 1 SD + PD adaptation, the number of antenna ports (if not configured, the number of antenna ports configured for the associated CSI-RS resource) based on the port subset indication information configured for the configured sub-configuration (for P-CSI reporting) or activated / triggered sub-configuration(s) (for SP-CSI reporting and / or AP-CSI reporting) may be limited to 4 or less. Alternatively, for type 2 SD or PD or type 2 SD + PD adaptation, the number of antenna ports provided through the CSI-RS resource(s) set in the corresponding CSI report configuration may be limited to 4 or less.

[0204] Alternatively, when one or more sub-configurations are set for one CSI report configuration for NES purposes, a constraint may be imposed such that condition #1 of Table 11 above is not always satisfied and only condition #2 or condition #3 is satisfied, or condition #1 and condition #2 of Table 11 above may be not always satisfied and only condition #3 is satisfied.

[0205] When a CSI report configuration includes a list of sub-configurations, ambiguity may arise in determining (Z, Z'). If, for (Z, Z') determination, conditions #1, #2, etc. are simply checked for satisfaction for each sub-configuration, the terminal may incur an excessive processing burden in determining the (Z, Z') combination.

[0206] Here, (i) the (Z, Z') values ​​according to Condition #1 (i.e., the (Z1, Z1') values ​​in Table 5.4-1) are smaller than the (Z, Z') values ​​according to Condition #2 (i.e., the (Z1, Z1') values ​​in Table 5.4-2), and (ii) the (Z, Z') values ​​according to Condition #2 (i.e., the (Z1, Z1') values ​​in Table 5.4-2) are smaller than the (Z, Z') values ​​according to Condition #3 (i.e., the (Z2, Z2') values ​​in Table 5.4-2). Therefore, when using the (Z, Z') values ​​according to Condition #3, which can secure the most ample CSI processing time, there is an advantage in that the terminal can secure the CSI processing time without having to individually check whether Conditions #1 and #2 are satisfied for each sub-configuration.

[0207] That is, even if CSI calculation is possible for some sub-configurations if only the CSI processing time according to Condition #1 (or Condition #2) is secured, there is a possibility that CSI processing time according to Condition #3 may be required for other sub-configurations. In this situation, checking all conditions individually for each sub-configuration to use the minimum (Z, Z') value, and determining the (Z, Z') value according to the specific sub-configuration that requires the largest (Z, Z') value among these sub-configurations has the disadvantage of increasing the processing overhead of the terminal. To solve this problem, it is proposed to use a relatively large (Z, Z') value according to Condition #3 that can be satisfied by all sub-configurations without checking them individually.

[0208] Meanwhile, reporting 'ssb-Index-SINR', 'cri-SINR', 'ssb-Index-SINR- Index' or 'cri-SINR- Index' in Table 11 is related to beam management. That is, (i) "if the CSI to be transmitted corresponds to wideband frequency-granularity where the reportQuantity is set to 'ssb-Index-SINR', 'cri-SINR', 'ssb-Index-SINR- Index', or 'cri-SINR- Index', or ((Z1,Z1')of the table 5.4-2) if the CSI to be transmitted corresponds to wideband frequency-granularity where the reportQuantity is set to 'ssb-Index-SINR', 'cri-SINR', 'ssb-Index-SINR- Index ', or 'cri-SINR- Index ', or)" and (ii) "if the reportQuantity is set to 'cri-RSRP', 'ssb-Index-RSRP', 'cri-RSRP- Index', or 'ssb-Index-RSRP- Index', (Z3,Z3'), where Xμ follows the capability beamReportTiming reported by the UE and KBl follows the capability beamSwitchTiming reported by the UE as defined in [13, TS 38.306], or ((Z3,Z3')of the table 5.4-2 if reportQuantity is set to 'cri-RSRP', 'ssb-Index-RSRP', 'cri-RSRP- Index' or 'ssb-Index-RSRP- Index ', where Xμ is according to UE reported capability beamReportTiming and KBl is according to UE reported capability beamSwitchTiming as defined in [13, TS 38.306], or) is related to beam management. However, since the current NES operation does not apply to beam management, condition #3 can be applied directly without considering whether the sub-configuration configured for NES satisfies the conditions for beam management. To be more precise, if a CSI reporting configuration including a list of sub-configurations is set to the UE, the UE shall set the upper layer parameter reportQuantity to 'cri-RSRP', 'cri-SINR', 'cri-SINR- Index', 'cri-RSRP-Index', 'none', 'ssb-Index-RSRP', It is not expected that reportQuantity will be set to 'ssb-Index-SINR', 'ssb-Index-RSRP- Index', 'ssb-Index-SINR- Index', or 'tdcp'. Therefore, when a CSI reporting configuration including a list of sub-configurations is set to a terminal, the terminal can directly apply condition #3 without having to consider whether the conditions that apply when reportQuantity is set to 'cri-RSRP', 'ssb-Index-RSRP', 'cri-RSRP- Index', or 'ssb-Index-RSRP- Index', 'ssb-Index-SINR', 'cri-SINR', 'ssb-Index-SINR- Index ', or 'cri-SINR- Index ' are satisfied.

[0209] FIG. 8 is a diagram illustrating CSI calculation time and valid CSI report determination according to one embodiment. In FIG. 8, for convenience of explanation, conditions related to beam management are excluded (or assumed not to be met).

[0210] Referring to FIG. 8, the terminal can determine (Z, Z') differently depending on whether the CSI reporting configuration includes a sub-configuration (805). Determining the (Z, Z') values ​​using only condition #3 as described above can be restricted to cases where the CSI reporting configuration includes a list of sub-configurations(s). In other words, if the CSI reporting configuration does not include a list of sub-configurations(s), the satisfaction of conditions including conditions #1 and #2 can be checked as before, and if the remaining conditions are not satisfied, the (Z, Z') values ​​can be determined according to condition #3.

[0211] For example, the terminal may determine (Z, Z') values ​​based on the first (Z1, Z1') if the CSI reporting configuration does not include a list of sub-configuration(s) and condition #1 is satisfied (810 Y, 815). The first (Z1, Z1') may refer to (Z1, Z1') of Table 5.4-1 included in Table 11.

[0212] For example, the terminal may determine the (Z, Z') values ​​based on the second (Z1, Z1') if the CSI reporting configuration does not include a list of sub-configuration(s) and condition #2 is satisfied (820 Y, 825). The second (Z1, Z1') may refer to (Z1, Z1') of Table 5.4-2 included in Table 11.

[0213] Condition #1 and Condition #2 may be conditions related to CSI with at most 4 CSI-RS ports or less for a single resource, respectively. Specifically, Condition #1 may mean that when max{μPDCCH, μCSI-RS, μUL} ≤ 3 and L = 0 CPU is occupied (as per Section 5.2.1.6), the CSI to be transmitted is a single CSI that is triggered and transmitted without a PUSCH containing a transport block or HARQ-ACK or both, corresponding to a wideband frequency granularity, and the CSI corresponds to at most 4 CSI-RS ports in a single resource without CRI reporting, and CodebookType is set to 'typeI-SinglePanel' or reportQuantity is set to 'cri-RI-CQI'. Condition #2 could mean that the CSI to be transmitted corresponds to wideband frequency granularity, corresponds to up to 4 CSI-RS ports in a single resource without CRI reporting, and CodebookType is set to 'typeI-SinglePanel' or reportQuantity is set to 'cri-RI-CQI'.

[0214] The terminal may determine (Z, Z') based on (Z2,Z2') of Table 5.4-2 (820 N, 830) if the CSI reporting configuration does not include a list of sub-configuration(s) and neither Condition #1 nor Condition #2 is satisfied.

[0215] Alternatively, the terminal may determine (Z, Z') based only on (Z2,Z2') of Table 5.4-2 (805 Y, 830) if the CSI reporting configuration includes a list of sub-configuration(s) (regardless of both Condition #1 and Condition #2).

[0216] The terminal can determine whether the valid CSI report requirement is satisfied based on the determined (Z, Z') (835). Specifically, the terminal can determine (Zref, Z'ref) based on the determined (Z, Z'). If the interval from the end of the last symbol of the PDCCH that triggers the CSI report to the start of the CP of the first symbol of the CSI report is greater than or equal to Zref, and if the interval from the end of the last symbol of the CSI-RS resource to the start of the CP of the first symbol of the CSI report is greater than or equal to Z'ref, the terminal can determine that the valid CSI report requirement is satisfied and perform the CSI report. Otherwise, the terminal can determine that the requested CSI report is invalid and not perform it.

[0217] For example, it can be defined in the standard as shown in Table 12 below.

[0218]

[0219]

[0220] [Proposal #3] Defining CPU occupancy intervals for CSI reporting with one or more sub-configurations

[0221] Table 13 is an excerpt from the existing NR standard document, TS 38.214 v17.6.0.

[0222]

[0223]

[0224]

[0225] According to Table 13 above, for case #1 / 2 / 3 (in case of CSI report configuration with one or more sub-configurations set), it may be unclear which resource the linked CSI-RS resource is.

[0226] - For the P-CSI report, the CPU occupancy interval can be defined as in case #1 above, targeting only the CSI-RS resource(s) linked to the set L sub-configuration(s).

[0227] - For SP-CSI report, CPU occupancy interval can be defined as in case #1 / 2 above only for CSI-RS resource(s) linked to N sub-configuration(s) activated or triggered by MAC CE (for SP-CSI report on PUCCH) or DCI (for SP-CSI report on PUSCH) among L sub-configuration(s) set.

[0228] - For the AP-CSI report, the CPU occupancy interval can be defined as in case #3 above only for the CSI-RS resource(s) linked to the N sub-configuration(s) triggered by DCI among the L sub-configuration(s) set.

[0229] This method can be applied only in case of type 2 SD or SD + PD adaptation (i.e., only a subset of CSI-RS resources associated with a CSI report configuration can be linked within one sub-configuration).

[0230] [Proposal #4] Validity check and CSI reporting method for CSI reporting with one or more sub-configurations set

[0231] Table 14 is an excerpt from the existing NR standard document, TS 38.214 v17.6.0.

[0232]

[0233]

[0234] When the CSI processing time and resulting terminal operation can be defined as described in Table 14 above, the following issues may exist for a CSI report configuration with one or more sub-configurations set, and the solutions for each issue are as follows.

[0235] - Issue 1: How to check the validity of CSI reports

[0236] When multiple sub-configurations are configured (for P-CSI reporting) or activated / triggered (for SP / AP-CSI reporting), the validity check can be performed separately for each sub-configuration. Alternatively, it can be configured separately whether to perform the check on a sub-configuration-by-subconfiguration basis or on a CSI-by-CSI reporting basis as before.

[0237] - Issue 2: Clarification of CSI-RS resources that may be involved in determining the starting point of Z.

[0238] For the AP-CSI report, the starting point of Z' can be determined only for the CSI-RS resource(s) linked to the N sub-configuration(s) triggered by DCI among the L sub-configuration(s) set.

[0239] - Issue 3: Handling cases where the Z' timeline is not satisfied

[0240] (i) When multiple sub-configurations are activated and the Z' timeline is satisfied for some sub-configurations (the corresponding sub-configurations are conveniently named valid sub-configurations) but the Z' timeline is not satisfied for other sub-configurations (the corresponding sub-configurations are conveniently named invalid sub-configurations), Opt1) the CSI information corresponding to the invalid sub-configurations can be dropped / omit and only the CSI information corresponding to the valid sub-configurations can be configured and fed back / reported by the terminal to the base station. Or Opt2) the CSI information corresponding to all sub-configurations can be fed back / reported by the terminal to the base station, but the CSI information corresponding to the invalid sub-configurations can be reported without being updated from the previous report or including a default value (in the present invention, the default value may mean a value that the base station sets in advance or is predefined, and may be, for example, the lowest CQI / PMI value).

[0241] (ii) If multiple sub-configurations are activated and the Z' timeline is satisfied for some sub-configurations (the sub-configurations are conveniently named as valid sub-configurations) but the Z' timeline is not satisfied for other sub-configurations (the sub-configurations are conveniently named as invalid sub-configurations), the entire CSI reporting may be handled in the same way as when the Z' timeline is not satisfied (i.e., the UE may ignore the scheduling DCI if the number of triggered reports is one and no HARQ-ACK or transport block is multiplexed on the PUSCH. Otherwise, the UE is not required to update the CSI for the n-th triggered CSI report).

[0242] (iii) The solution to the issue can be applied only in the case where validity check is performed separately for each sub-configuration in Issue 1 above.

[0243] This method can be applied only in case of type 2 SD or SD + PD adaptation (i.e., only a subset of CSI-RS resources associated with a CSI report configuration can be linked within one sub-configuration).

[0244] Figure 9 illustrates an example of the operation of a terminal and a network according to one embodiment.

[0245] Referring to FIG. 9, a terminal can receive a CSI reporting setting including a list of one or more sub-configurations from a network through upper layer signaling (905).

[0246] The terminal can calculate CSI based on the proposed CPU occupation, CSI-RS resource / port counting, and / or CSI processing time method (910).

[0247] The terminal can transmit the calculated CSI to the network for the CSI reporting setting (915).

[0248] FIG. 10 illustrates an example of aperiodic CSI reporting according to one embodiment.

[0249] A terminal may receive CSI reporting configuration(s) from a network via upper layer signaling (A05). It is assumed that at least one of the CSI reporting configuration(s) includes a list of sub-configurations. For each sub-configuration, at least one of a CSI codebook, an enablement of a CSI-RS (channel state information-reference signal) antenna port subset, a CSI-RS resource subset, or power offset information may be individually configured.

[0250] A terminal may receive a CSI request from the network (A10). The CSI request may be received via DCI included in a PDCCH. The CSI request may request aperiodically transmitting CSI reports based on a CSI reporting configuration that includes a list of sub-configurations.

[0251] The terminal can determine the validity of the requested aperiodic CSI report (A15). The terminal can determine (Z, Z') and, based on the determined (Zref, Z'ref). The terminal can determine the validity of the requested aperiodic CSI report based on the determined (Zref, Z'ref). The Z value (and / or Zref) may be related to the time length from the end of the last symbol of the PDCCH to the start of the CP of the first symbol of the CSI report. The Z' value (and / or Z'ref) may be related to the time length from the end of the last symbol of the CSI-RS resource to the start of the CP of the first symbol of the CSI report.

[0252] The terminal may determine the Z value and the Z' value based only on Z2, Z2' of Table 5.4-2 included in Table 11 described above, based on the fact that the aperiodic CSI report is related to a CSI reporting configuration that includes a list of sub-configuration(s).

[0253] The terminal may calculate and report CSI if it determines that the requested aperiodic CSI report is valid (A20, A25). Aperiodic CSI reports may be transmitted via the PUSCH.

[0254] Figure 11 illustrates a flow of terminal operation according to one embodiment.

[0255] Referring to FIG. 11, the terminal can receive CSI (channel state information) reporting settings through upper layer signaling (B05).

[0256] The terminal can receive DCI (downlink control information) containing information for a CSI request through a PDCCH (physical downlink control channel) (B10).

[0257] The terminal may transmit a CSI report related to the CSI request based on whether the conditions for a valid CSI report are satisfied (B15).

[0258] The terminal may determine whether the conditions for valid CSI reporting are satisfied based on the Z value and the Z' value. The Z value may be related to the time length from the last symbol of the PDCCH to the first symbol of the CSI report, and the Z' value may be related to the time length from the last symbol of the CSI-RS resource to the first symbol of the CSI report.

[0259] Based on the above CSI reporting configuration including a list of sub-configurations for individually configuring at least one of a CSI codebook, an enablement of a CSI-RS (channel state information-reference signal) antenna port subset, a CSI-RS resource subset, or power offset information for each sub-configuration, the terminal can: determine the Z value and the Z' value based on only some of the (Z, Z')-candidate values ​​among a plurality of (Z, Z')-candidate values.

[0260] Based on the above CSI reporting configuration including the list of the sub-configurations, the terminal can determine the Z value and the Z' value only based on the third (Z, Z')-candidate values, excluding the first (Z, Z')-candidate values ​​and the second (Z, Z')-candidate values ​​for each of a plurality of conditions related to CSI, which are not more than 4 CSI-RS ports for a single resource.

[0261] The above multiple conditions include a first condition, and the first condition can be satisfied when (i) a numeral related to subcarrier spacing (SCS) is less than a threshold, (ii) CSI is triggered while 0 CPUs (CSI processing units) are occupied, (iii) a physical uplink shared channel (PUSCH) for transmitting the CSI report does not include any of a transport block or HARQ-ACK, (iv) the CSI report does not include a CRI (CSI-RS Resource Indicator) and has a wideband frequency granularity with a maximum of 4 CSI-RS ports for a single resource or less, and (v) a codebook type is a single panel or a report content is set to cri-RI-CQI (cri-rank indicator-channel quality indicator).

[0262] The above multiple conditions include a second condition, and the second condition can be satisfied when (iv) the CSI report does not include a CRI (CSI-RS Resource Indicator) and has a wideband frequency granularity with a maximum of 4 CSI-RS ports for a single resource or less, and (v) the codebook type is a single panel or the report content is set to cri-RI-CQI (cri-rank indicator-channel quality indicator).

[0263] The above plurality of (Z, Z')-candidate values ​​may include first (Z, Z')-candidate values, second (Z, Z')-candidate values ​​greater than the first (Z, Z')-candidate values ​​for the same numeral, and third (Z, Z')-candidate values ​​greater than the first (Z, Z')-candidate values ​​and the second (Z, Z')-candidate values ​​for the same numeral. Based on the CSI reporting configuration including the list of sub-configurations, the terminal may determine the Z value and the Z' value based only on the third (Z, Z')-candidate values.

[0264] The above Z value may be related to the time length from the end of the last symbol of the PDCCH to the start of the CP (cyclic prefix) of the first symbol of the CSI report, and the above Z' value may be related to the time length from the end of the last symbol of the CSI-RS resource to the start of the CP of the first symbol of the CSI report.

[0265] Based on the above CSI reporting setting including the list of the sub-settings, the terminal can determine the Z value and the Z' value based only on Z2, Z2' of Table 5.4-2 included in Table 11 described above.

[0266] Figure 12 illustrates the flow of base station operation according to one embodiment.

[0267] Referring to FIG. 12, the base station can transmit a CSI (channel state information) report setting via upper layer signaling (C05).

[0268] The base station can transmit DCI (downlink control information) containing information for a CSI request through PDCCH (physical downlink control channel) (C10).

[0269] The base station can receive a CSI report related to the CSI request based on whether the conditions for a valid CSI report are satisfied (C15).

[0270] It can be determined whether the conditions for valid CSI reporting are satisfied based on the Z value and the Z' value. The Z value may be related to the time length from the last symbol of the PDCCH to the first symbol of the CSI report, and the Z' value may be related to the time length from the last symbol of the CSI-RS resource to the first symbol of the CSI report.

[0271] Wherein the CSI reporting configuration includes a list of sub-configurations for individually configuring at least one of a CSI codebook, an enablement of a CSI-RS (channel state information-reference signal) antenna port subset, a CSI-RS resource subset, or power offset information for each sub-configuration: the Z value and the Z' value can be determined based on only some of the (Z, Z')-candidate values ​​among a plurality of (Z, Z')-candidate values.

[0272] Based on the above CSI reporting configuration including the list of the sub-configurations, the base station can determine the Z value and the Z' value only based on the third (Z, Z')-candidate values, excluding the first (Z, Z')-candidate values ​​and the second (Z, Z')-candidate values ​​for each of a plurality of conditions related to CSI, which are not more than 4 CSI-RS ports for a single resource.

[0273] The above multiple conditions include a first condition, and the first condition can be satisfied when (i) a numeral related to subcarrier spacing (SCS) is less than a threshold, (ii) CSI is triggered while 0 CPUs (CSI processing units) are occupied, (iii) a physical uplink shared channel (PUSCH) for transmitting the CSI report does not include any of a transport block or HARQ-ACK, (iv) the CSI report does not include a CRI (CSI-RS Resource Indicator) and has a wideband frequency granularity with a maximum of 4 CSI-RS ports for a single resource or less, and (v) a codebook type is a single panel or a report content is set to cri-RI-CQI (cri-rank indicator-channel quality indicator).

[0274] The above multiple conditions include a second condition, and the second condition can be satisfied when (iv) the CSI report does not include a CRI (CSI-RS Resource Indicator) and has a wideband frequency granularity with a maximum of 4 CSI-RS ports for a single resource or less, and (v) the codebook type is a single panel or the report content is set to cri-RI-CQI (cri-rank indicator-channel quality indicator).

[0275] The above plurality of (Z, Z')-candidate values ​​may include first (Z, Z')-candidate values, second (Z, Z')-candidate values ​​greater than the first (Z, Z')-candidate values ​​for the same numeral, and third (Z, Z')-candidate values ​​greater than the first (Z, Z')-candidate values ​​and the second (Z, Z')-candidate values ​​for the same numeral. Based on the CSI reporting configuration including the list of sub-configurations, the base station may determine the Z value and the Z' value based only on the third (Z, Z')-candidate values.

[0276] The above Z value may be related to the time length from the end of the last symbol of the PDCCH to the start of the CP (cyclic prefix) of the first symbol of the CSI report, and the above Z' value may be related to the time length from the end of the last symbol of the CSI-RS resource to the start of the CP of the first symbol of the CSI report.

[0277] Based on the above CSI reporting setting including the list of the sub-settings, the base station can determine the Z value and the Z' value based only on Z2, Z2' of Table 5.4-2 included in Table 11 described above.

[0278] Fig. 13 illustrates a communication system (1) applicable to the present disclosure.

[0279] Referring to FIG. 13, a communication system (1) includes a wireless device, a base station, and a network. Here, the wireless device refers to a device that performs communication using a wireless access technology (e.g., 5G NR (New RAT), LTE (Long Term Evolution)) and may be referred to as a communication / wireless / 5G device. Although not limited thereto, the wireless device may include a robot (100a), a vehicle (100b-1, 100b-2), an XR (eXtended Reality) device (100c), a hand-held device (100d), a home appliance (100e), an IoT (Internet of Things) device (100f), and an AI device / server (400). For example, the vehicle may include a vehicle equipped with a wireless communication function, an autonomous vehicle, a vehicle capable of performing vehicle-to-vehicle communication, etc. Here, the vehicle may include an Unmanned Aerial Vehicle (UAV) (e.g., a drone). XR devices include AR (Augmented Reality) / VR (Virtual Reality) / MR (Mixed Reality) devices, and can be implemented in the form of HMD (Head-Mounted Device), HUD (Head-Up Display) installed in a vehicle, television, smartphone, computer, wearable device, home appliance, digital signage, vehicle, robot, etc. Mobile devices can include smartphone, smart pad, wearable device (e.g., smart watch, smart glass), computer (e.g., laptop, etc.), etc. Home appliances can include TV, refrigerator, washing machine, etc. IoT devices can include sensors, smart meters, etc. For example, base stations and networks can also be implemented as wireless devices, and a specific wireless device (200a) can act as a base station / network node to other wireless devices.

[0280] Wireless devices (100a to 100f) can be connected to a network (300) via a base station (200). Artificial Intelligence (AI) technology can be applied to the wireless devices (100a to 100f), and the wireless devices (100a to 100f) can be connected to an AI server (400) via the network (300). The network (300) can be configured using a 3G network, a 4G (e.g., LTE) network, a 5G (e.g., NR) network, etc. The wireless devices (100a to 100f) can communicate with each other via the base station (200) / network (300), but can also communicate directly (e.g., sidelink communication) without going through the base station / network. For example, vehicles (100b-1, 100b-2) can communicate directly (e.g., V2V (Vehicle to Vehicle) / V2X (Vehicle to Everything) communication). In addition, IoT devices (e.g., sensors) can communicate directly with other IoT devices (e.g., sensors) or other wireless devices (100a to 100f).

[0281] Wireless communication / connection (150a, 150b, 150c) can be established between wireless devices (100a~100f) / base stations (200), and base stations (200) / base stations (200). Here, wireless communication / connection can be achieved through various wireless access technologies (e.g., 5G NR) such as uplink / downlink communication (150a), sidelink communication (150b) (or D2D communication), and communication between base stations (150c) (e.g., relay, IAB (Integrated Access Backhaul). Through wireless communication / connection (150a, 150b, 150c), wireless devices and base stations / wireless devices, and base stations and base stations can transmit / receive wireless signals to each other. For example, wireless communication / connection (150a, 150b, 150c) can transmit / receive signals through various physical channels. To this end, at least some of various configuration information setting processes for transmitting / receiving wireless signals, various signal processing processes (e.g., channel encoding / decoding, modulation / demodulation, resource mapping / demapping, etc.), and resource allocation processes can be performed based on various proposals of the present invention.

[0282] Figure 14 illustrates a wireless device applicable to the present invention.

[0283] Referring to FIG. 14, the first wireless device (100) and the second wireless device (200) can transmit and receive wireless signals through various wireless access technologies (e.g., LTE, NR). Here, {the first wireless device (100), the second wireless device (200)} can correspond to {the wireless device (100x), the base station (200)} and / or {the wireless device (100x), the wireless device (100x)} of FIG. 13.

[0284] A first wireless device (100) includes one or more processors (102) and one or more memories (104), and may further include one or more transceivers (106) and / or one or more antennas (108). The processor (102) controls the memories (104) and / or the transceivers (106), and may be configured to implement the descriptions, functions, procedures, proposals, methods, and / or operational flowcharts disclosed in this document. For example, the processor (102) may process information in the memory (104) to generate first information / signal, and then transmit a wireless signal including the first information / signal via the transceiver (106). In addition, the processor (102) may receive a wireless signal including second information / signal via the transceiver (106), and then store information obtained from signal processing of the second information / signal in the memory (104). The memory (104) may be connected to the processor (102) and may store various information related to the operation of the processor (102). For example, the memory (104) may perform some or all of the processes controlled by the processor (102), or may store software code including commands for performing the descriptions, functions, procedures, proposals, methods, and / or operation flowcharts disclosed in this document. Here, the processor (102) and the memory (104) may be part of a communication modem / circuit / chip designed to implement a wireless communication technology (e.g., LTE, NR). The transceiver (106) may be connected to the processor (102) and may transmit and / or receive wireless signals via one or more antennas (108). The transceiver (106) may include a transmitter and / or a receiver. The transceiver (106) may be used interchangeably with an RF (Radio Frequency) unit. In the present invention, a wireless device may also mean a communication modem / circuit / chip.

[0285] The second wireless device (200) includes one or more processors (202), one or more memories (204), and may further include one or more transceivers (206) and / or one or more antennas (208). The processor (202) controls the memories (204) and / or the transceivers (206), and may be configured to implement the descriptions, functions, procedures, proposals, methods, and / or operational flowcharts disclosed in this document. For example, the processor (202) may process information in the memory (204) to generate third information / signals, and then transmit a wireless signal including the third information / signals via the transceivers (206). Furthermore, the processor (202) may receive a wireless signal including fourth information / signals via the transceivers (206), and then store information obtained from signal processing of 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 perform some or all of the processes controlled by the processor (202), or may store software code including commands for performing the descriptions, functions, procedures, proposals, methods, and / or operation flowcharts disclosed in this document. Here, the processor (202) and the memory (204) may be part of a communication modem / circuit / chip designed to implement wireless communication technology (e.g., LTE, NR). The transceiver (206) may be connected to the processor (202) and may transmit and / or receive wireless signals via one or more antennas (208). The transceiver (206) may include a transmitter and / or a receiver. The transceiver (206) may be used interchangeably with an RF unit. In the present invention, a wireless device may also mean a communication modem / circuit / chip.

[0286] Hereinafter, the hardware elements of the wireless device (100, 200) will be described in more detail. Although not limited thereto, one or more protocol layers may be implemented by one or more processors (102, 202). For example, one or more processors (102, 202) may implement one or more layers (e.g., functional layers such as PHY, MAC, RLC, PDCP, RRC, SDAP). One or more processors (102, 202) may generate one or more Protocol Data Units (PDUs) and / or one or more Service Data Units (SDUs) according to the descriptions, functions, procedures, proposals, methods, and / or operation flowcharts disclosed in this document. One or more processors (102, 202) may generate messages, control information, data, or information according to the descriptions, functions, procedures, proposals, methods, and / or operation flowcharts disclosed in this document. One or more processors (102, 202) can generate signals (e.g., baseband signals) including PDUs, SDUs, messages, control information, data or information according to the functions, procedures, proposals and / or methods disclosed herein, and provide the signals to one or more transceivers (106, 206). One or more processors (102, 202) can receive signals (e.g., baseband signals) from one or more transceivers (106, 206) and obtain PDUs, SDUs, messages, control information, data or information according to the descriptions, functions, procedures, proposals, methods and / or operational flowcharts disclosed herein.

[0287] One or more processors (102, 202) may be referred to as a controller, a microcontroller, a microprocessor, or a microcomputer. One or more processors (102, 202) may be implemented by hardware, firmware, software, or a combination thereof. For example, one or more Application Specific Integrated Circuits (ASICs), one or more Digital Signal Processors (DSPs), one or more Digital Signal Processing Devices (DSPDs), one or more Programmable Logic Devices (PLDs), or one or more Field Programmable Gate Arrays (FPGAs) may be included in one or more processors (102, 202). The descriptions, functions, procedures, proposals, methods, and / or operational flowcharts disclosed in this document may be implemented using firmware or software, and the firmware or software may be implemented to include modules, procedures, functions, etc. The descriptions, functions, procedures, suggestions, methods and / or operation flowcharts disclosed in this document may be implemented using firmware or software configured to perform one or more processors (102, 202) or stored in one or more memories (104, 204) and executed by one or more processors (102, 202). The descriptions, functions, procedures, suggestions, methods and / or operation flowcharts disclosed in this document may be implemented using firmware or software in the form of codes, instructions and / or sets of instructions.

[0288] One or more memories (104, 204) may be coupled to one or more processors (102, 202) and may store various forms of data, signals, messages, information, programs, codes, instructions, and / or commands. The one or more memories (104, 204) may be configured as ROM, RAM, EPROM, flash memory, hard drives, registers, cache memory, computer-readable storage media, and / or combinations thereof. The one or more memories (104, 204) may be located internally and / or externally to the one or more processors (102, 202). Additionally, the one or more memories (104, 204) may be coupled to the one or more processors (102, 202) via various technologies, such as wired or wireless connections.

[0289] One or more transceivers (106, 206) can transmit user data, control information, wireless signals / channels, etc., as mentioned in the methods and / or flowcharts of this document, to one or more other devices. One or more transceivers (106, 206) can receive user data, control information, wireless signals / channels, etc., as mentioned in the descriptions, functions, procedures, proposals, methods and / or flowcharts of this document, from one or more other devices. For example, one or more transceivers (106, 206) can be connected to one or more processors (102, 202) and can transmit and receive wireless signals. For example, one or more processors (102, 202) can control one or more transceivers (106, 206) to transmit user data, control information, or wireless signals to one or more other devices. Additionally, one or more processors (102, 202) may control one or more transceivers (106, 206) to receive user data, control information, or wireless signals from one or more other devices. Additionally, one or more transceivers (106, 206) may be coupled to one or more antennas (108, 208), and one or more transceivers (106, 206) may be configured to transmit and receive user data, control information, wireless signals / channels, or the like, as referred to in the descriptions, functions, procedures, proposals, methods, and / or operational flowcharts disclosed herein, via one or more antennas (108, 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, 206) can convert received user data, control information, wireless signals / channels, etc. from RF band signals to baseband signals in order to process the received user data, control information, wireless signals / channels, etc. using one or more processors (102, 202).One or more transceivers (106, 206) may convert user data, control information, wireless signals / channels, etc. processed by one or more processors (102, 202) from baseband signals to RF band signals. For this purpose, one or more transceivers (106, 206) may include an (analog) oscillator and / or filter.

[0290] The embodiments described above are combinations of components and features of the present invention in a predetermined form. Each component or feature should be considered optional unless explicitly stated otherwise. Each component or feature may be implemented without being combined with other components or features. Furthermore, it is also possible to form an embodiment of the present invention by combining some components and / or features. The order of operations described in the embodiments of the present invention may be changed. Some components or features of one embodiment may be included in another embodiment or may be replaced with corresponding components or features of another embodiment. It is self-evident that claims that do not have an explicit citation relationship in the patent claims may be combined to form an embodiment or may be incorporated as a new claim through a post-application amendment.

[0291] It will be apparent to those skilled in the art that the present invention can be embodied in other specific forms without departing from the scope of the invention. Therefore, the above detailed description should not be construed as limiting in any respect, but rather as illustrative. The scope of the present invention should be determined by a reasonable interpretation of the appended claims, and all modifications within the scope of equivalents of the present invention are intended to be included within the scope of the present invention.

[0292] The present invention can be used in a terminal, base station, or other equipment of a wireless mobile communication system.

Claims

1. In a method performed by a terminal, Receive channel state information (CSI) reporting settings via upper layer signaling; Receiving DCI (downlink control information) containing information for CSI request through PDCCH (physical downlink control channel); and Including transmitting a CSI report related to said CSI request based on satisfaction of a condition for a valid CSI report; The terminal determines whether the conditions for the valid CSI report are satisfied based on the Z value and the Z' value, wherein the Z value is related to the time length from the last symbol of the PDCCH to the first symbol of the CSI report, and the Z' value is related to the time length from the last symbol of the CSI-RS resource to the first symbol of the CSI report. Based on the above CSI reporting configuration including a list of sub-configurations for individually configuring at least one of a CSI codebook, an enablement of a CSI-RS (channel state information-reference signal) antenna port subset, a CSI-RS resource subset, or power offset information for each sub-configuration, the terminal: A method for determining the Z value and the Z' value based on only some of the (Z, Z')-candidate values ​​among a plurality of (Z, Z')-candidate values.

2. In paragraph 1, A method wherein the terminal determines the Z value and the Z' value based only on the third (Z, Z')-candidate values, excluding the first (Z, Z')-candidate values ​​and the second (Z, Z')-candidate values ​​for each of a plurality of conditions related to CSI, which are not more than 4 CSI-RS ports for a single resource, based on the CSI reporting configuration including the list of sub-configurations.

3. In paragraph 2, The above multiple conditions include the first condition, A method in which the above first condition is satisfied when (i) a numeral related to subcarrier spacing (SCS) is less than a threshold, (ii) CSI is triggered while 0 CPUs (CSI processing units) are occupied, (iii) a physical uplink shared channel (PUSCH) for transmitting the CSI report does not include either a transport block or HARQ-ACK, (iv) the CSI report does not include a CRI (CSI-RS Resource Indicator) and has a wideband frequency granularity with a maximum of 4 CSI-RS ports for a single resource or less, and (v) a codebook type is a single panel or a report content is set to cri-RI-CQI (cri-rank indicator-channel quality indicator).

4. In paragraph 3, The above multiple conditions include a second condition, The above second condition is satisfied when (iv) the CSI report does not include a CRI (CSI-RS Resource Indicator) and has a wideband frequency granularity with a maximum of 4 CSI-RS ports for a single resource, and (v) the codebook type is a single panel or the report content is set to cri-RI-CQI (cri-rank indicator-channel quality indicator).

5. In paragraph 1, The above plurality of (Z, Z')-candidate values ​​include first (Z, Z')-candidate values, second (Z, Z')-candidate values ​​greater than the first (Z, Z')-candidate values ​​for the same numeral, and third (Z, Z')-candidate values ​​greater than the first (Z, Z')-candidate values ​​and the second (Z, Z')-candidate values ​​for the same numeral, A method wherein the terminal determines the Z value and the Z' value based only on the third (Z, Z')-candidate values, based on the CSI reporting setting including the list of sub-settings.

6. In paragraph 1, The above Z value is related to the time length from the end of the last symbol of the PDCCH to the start of the CP (cyclic prefix) of the first symbol of the CSI report, The above Z' value is related to the time length from the end of the last symbol of the CSI-RS resource to the start of the CP of the first symbol of the CSI report.

7. In paragraph 1, Based on the above CSI reporting setting including the list of the sub-settings, the terminal determines the Z value and the Z' value based only on Table A below. [Table A] method.

8. A non-transitory recording medium configured to store instructions that, when executed by a processor of a terminal, cause the terminal to perform the method described in claim 1.

9. In the device, At least one memory configured to store instructions; and At least one processor configured to perform operations by executing the above instructions, The operations performed by at least one processor are: Receive channel state information (CSI) reporting settings via upper layer signaling; Receiving DCI (downlink control information) containing information for CSI request through PDCCH (physical downlink control channel); and Including transmitting a CSI report related to said CSI request based on satisfaction of a condition for a valid CSI report; The device determines whether the condition for the valid CSI report is satisfied based on the Z value and the Z' value, wherein the Z value is related to the time length from the last symbol of the PDCCH to the first symbol of the CSI report, and the Z' value is related to the time length from the last symbol of the CSI-RS resource to the first symbol of the CSI report. Based on the above CSI reporting configuration including a list of sub-configurations for individually configuring at least one of a CSI codebook, an enablement of a CSI-RS (channel state information-reference signal) antenna port subset, a CSI-RS resource subset, or power offset information for each sub-configuration, the device: A device that determines the Z value and the Z' value based on only some of the (Z, Z')-candidate values ​​among a plurality of (Z, Z')-candidate values.

10. In paragraph 9, The above device further comprises a transceiver, The above device is a terminal configured to operate in a wireless communication system.

11. In paragraph 9, The above device is a processing device configured to control a terminal in a wireless communication system.

12. In a method performed by a base station, Transmit channel state information (CSI) reporting settings via upper layer signaling; Transmitting DCI (downlink control information) containing information for CSI request through PDCCH (physical downlink control channel); and Receiving a CSI report related to said CSI request based on satisfaction of a condition for a valid CSI report; It is determined whether the conditions for the valid CSI report are satisfied based on the Z value and the Z' value, wherein the Z value is related to the time length from the last symbol of the PDCCH to the first symbol of the CSI report, and the Z' value is related to the time length from the last symbol of the CSI-RS resource to the first symbol of the CSI report. Wherein the CSI reporting configuration includes a list of sub-configurations for individually configuring at least one of a CSI codebook, an enablement of a CSI-RS (channel state information-reference signal) antenna port subset, a CSI-RS resource subset, or power offset information for each sub-configuration: A method in which the Z value and the Z' value are determined based on only some of the (Z, Z')-candidate values ​​among a plurality of (Z, Z')-candidate values.

13. In the device, At least one memory configured to store instructions; and At least one processor configured to perform operations by executing the above instructions, The operations performed by at least one processor are: Transmit channel state information (CSI) reporting settings via upper layer signaling; Transmitting DCI (downlink control information) containing information for CSI request through PDCCH (physical downlink control channel); and Receiving a CSI report related to said CSI request based on satisfaction of a condition for a valid CSI report; It is determined whether the conditions for the valid CSI report are satisfied based on the Z value and the Z' value, wherein the Z value is related to the time length from the last symbol of the PDCCH to the first symbol of the CSI report, and the Z' value is related to the time length from the last symbol of the CSI-RS resource to the first symbol of the CSI report. Wherein the CSI reporting configuration includes a list of sub-configurations for individually configuring at least one of a CSI codebook, an enablement of a CSI-RS (channel state information-reference signal) antenna port subset, a CSI-RS resource subset, or power offset information for each sub-configuration: A device wherein the Z value and the Z' value are determined based on only some of the (Z, Z')-candidate values ​​among a plurality of (Z, Z')-candidate values.

14. In paragraph 13, The above device further comprises a transceiver, The above device is a base station configured to operate in a wireless communication system.

15. In paragraph 13, The above device is a processing device configured to control a base station in a wireless communication system.

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