Method performed by terminal or base station in wireless communication system, and device therefor

Abstract

A method performed by a terminal according to at least one of the embodiments disclosed in the present specification includes the steps of: receiving information on a channel state information (CSI) report configuration through higher layer signaling; acquiring CSI on the basis of a plurality of CSI-reference signal (CSI-RS) resources; and transmitting a CSI report related to a plurality of CSI-RS resource indicators (CRIs) on the basis of the CSI. The acquired CSI includes a plurality of part-2 CSIs associated with the plurality of CRIs, and the order of alignment of the plurality of part-2 CSIs in the CSI report can be determined on the basis of the plurality of CRIs.

Description

Method performed by a terminal or network in a wireless communication system and device therefor

[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 by a terminal or a network 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] In NR Rel.15~18, up to 32-Tx port CSI-RS transmission is supported, and a CRI (CSI-RS resource indicator) is defined to indicate the CSI-RS that the terminal uses for CSI reporting, and the structure is such that 1 CRI is linked to 1 CSI report.

[0004] To increase system throughput in NR Rel-19, discussions are underway to expand to a maximum of 128 port CSI-RS.

[0005] The technical task of this disclosure is to provide a method and device for efficiently performing wireless signal transmission and reception processes. As an example, methods for CSI reporting for multiple CRIs are provided.

[0006] In addition to the technical challenges described above, other technical challenges can be inferred from the description below.

[0007] According to one aspect of the present disclosure, a method performed by a terminal may include receiving information regarding a channel state information (CSI) reporting configuration via higher layer signaling; acquiring CSI based on a plurality of CSI-reference signal (CSI-RS) resources; and transmitting a CSI report related to a plurality of CSI-RS resource indicators (CRIs) based on the CSI. The acquired CSI may include a plurality of part-2 CSIs associated with the plurality of CRIs. A sorting order of the plurality of part-2 CSIs within the CSI report may be determined based on the plurality of CRIs.

[0008] Some of the plurality of Part-2 CSIs may be omitted from the CSI report. The omission priority of each of the plurality of Part-2 CSIs may be determined based on the plurality of CRIs.

[0009] Among the above multiple CRIs, the Part-2 CSI associated with the CRI with the lowest priority may have the highest omission priority.

[0010] The above plurality of Part-2 CSIs may be related to a plurality of groups, including a first group and a second group. The second group may have a higher omission priority than the first group.

[0011] Part-2 CSI linked to the CRI with the highest priority among the above multiple CRIs may be included in the above CSI report.

[0012] CSI reports related to the above multiple CRIs may have the same priority as CSI reports including L1-RSRP (layer 1-reference signal received power) or L1-SINR (layer 1-signal to interference plus noise ratio).

[0013] CSI reports related to the above multiple CRIs may have a higher priority than the remaining CSI reports except for CSI reports including L1-RSRP (layer 1-reference signal received power) or L1-SINR (layer 1-signal to interference plus noise ratio).

[0014] The above CSI report can be transmitted via PUSCH (physical uplink shared channel).

[0015] According to another aspect of the present disclosure, a non-transitory computer-readable recording medium having recorded thereon a program for performing the method described above may be provided.

[0016] According to another aspect of the present disclosure, a device comprises: a memory configured to store instructions; and a processor configured to perform operations by executing the instructions, wherein the operations of the processor may include receiving information about a channel state information (CSI) reporting configuration via higher layer signaling; acquiring CSI based on a plurality of CSI-reference signal (CSI-RS) resources; and transmitting a CSI report related to a plurality of CSI-RS resource indicators (CRIs) based on the CSI. The acquired CSI may include a plurality of part-2 CSIs associated with the plurality of CRIs. A sorting order of the plurality of part-2 CSIs within the CSI report may be determined based on the plurality of CRIs.

[0017] The above device may further include a transceiver.

[0018] The above device may be a terminal in a wireless communication system.

[0019] The above device may be a processing device configured to control a terminal in a wireless communication system.

[0020] According to another aspect of the present disclosure, a method performed by a base station may include transmitting information regarding a channel state information (CSI) reporting configuration to a terminal via higher layer signaling; transmitting a CSI-reference signal (CSI-RS) based on a plurality of CSI-RS resources; and receiving a CSI report related to a plurality of CSI-RS resource indicators (CRIs) from the terminal. The CSI report may include a plurality of part-2 CSIs associated with the plurality of CRIs. A sorting order of the plurality of part-2 CSIs within the CSI report may be determined based on the plurality of CRIs.

[0021] According to another aspect of the present disclosure, a non-transitory computer-readable recording medium having recorded thereon a program for performing the method described above may be provided.

[0022] According to another aspect of the present disclosure, a base station includes a memory configured to store instructions; and a processor configured to perform operations by executing the instructions, wherein the operations of the processor may include transmitting information about a channel state information (CSI) reporting configuration to a terminal via higher layer signaling; transmitting a CSI-RS based on a plurality of CSI-reference signal (CSI-RS) resources; and receiving a CSI report related to a plurality of CSI-RS resource indicators (CRIs) from the terminal. The CSI report includes a plurality of part-2 CSIs associated with the plurality of CRIs, and a sorting order of the plurality of part-2 CSIs within the CSI report may be determined based on the plurality of CRIs.

[0023] According to the present disclosure, wireless signal transmission and reception can be efficiently performed in a wireless communication system. For example, CSI reporting for multiple CRIs can be performed more efficiently, and ambiguity can be resolved when CSI omission is required by defining CRI-based priorities.

[0024] In addition to the technical effects described above, other technical effects can be inferred from the description below.

[0025] 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.

[0026] Figure 2 illustrates the structure of a radio frame.

[0027] Figure 3 illustrates a resource grid of slots.

[0028] Figure 4 illustrates an example of physical channels being mapped within a slot.

[0029] Figure 5 illustrates the PDSCH and ACK / NACK transmission process.

[0030] Figure 6 illustrates a PUSCH transmission process.

[0031] Figure 7 shows an example of a CSI-related procedure.

[0032] Figure 8 illustrates the antenna configuration and the port configuration within the panel.

[0033] Figure 9 is a diagram illustrating the structure of an enhanced Type II codebook.

[0034] FIG. 10 is a diagram illustrating a method for a terminal to report CSI to a network according to one embodiment.

[0035] FIG. 11 illustrates a flow of a method performed by a terminal according to one embodiment.

[0036] FIG. 12 illustrates a flow of a method performed by a base station according to one embodiment.

[0037] Figures 13 to 16 illustrate communication systems and wireless devices 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 the 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 terminal 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] CSI-related actions

[0107] Figure 7 shows an example of a CSI-related procedure.

[0108] 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.

[0109] - 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.

[0110] - 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.

[0111] - 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.

[0112] - 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.

[0113] - 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.

[0114] 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).

[0115] 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.

[0116] 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.

[0117] CSI codebooks defined in the NR standard (e.g., PMI codebooks) can be broadly divided into Type I and Type II codebooks. Type I codebooks are primarily targeted at SU (Single User)-MIMO, which supports both high-order and low-order signals. Type II codebooks can primarily support MI-MIMO, which supports up to two layers. Compared to Type I, Type II codebooks can provide more accurate CSI, but may increase signaling overhead. Meanwhile, Enhanced Type II codebooks were introduced to address the CSI overhead shortcomings of existing Type II codebooks. Enhanced Type II codebooks were introduced by reducing the codebook payload by considering frequency-axis correlation.

[0118] CSI reporting via PUSCH can be configured as Part 1 and Part 2. Part 1 has a fixed payload size and is used to identify the number of information bits in Part 2. Part 1 is transmitted in its entirety before Part 2.

[0119] - For Type I CSI feedback, Part 1 contains the RI (if reported), the CRI (if reported), and the CQI of the first code word. Part 2 contains the PMI, and when RI > 4, Part 2 contains the CQI.

[0120] - For Type II CSI feedback, Part 1 contains the RI (if reported), CQI, and an indication of the number of non-zero WB amplitude coefficients per layer of Type II CSI. Part 2 contains the PMI of Type II CSI.

[0121] - For Enhanced Type II CSI feedback, Part 1 contains the RI (if reported), CQI, and the total number of non-zero WB amplitude coefficients for all layers of Enhanced Type II CSI. Part 2 contains the PMI of Enhanced Type II CSI.

[0122] If CSI reporting on PUSCH includes two parts and the CSI payload to be reported is less than the payload size provided by the PUSCH resources allocated for CSI reporting, the UE may omit part of Part 2 CSI.

[0123] Meanwhile, semi-persistent CSI reporting performed in PUCCH format 3 or 4 supports Type II CSI feedback, but only Part 1 of Type II CSI feedback.

[0124] QCL (quasi-co location)

[0125] Two antenna ports are quasi-co-located if the channel properties of one antenna port can be inferred from the channel properties of the other antenna port. The channel properties may include one or more of Delay spread, Doppler spread, Frequency / Doppler shift, Average received power, Received Timing / average delay, and Spatial RX parameters.

[0126] A terminal can configure a list of multiple TCI-State configurations via the upper layer parameter PDSCH-Config. Each TCI-State is associated with one or two DL reference signals and a QCL configuration parameter between the DM-RS port of the PDSCH. The QCL can include qcl-Type1 for the first DL RS and qcl-Type2 for the second DL RS. The QCL type can correspond to one of the following:

[0127] - 'QCL-TypeA': {Doppler shift, Doppler spread, average delay, delay spread}

[0128] - 'QCL-TypeB': {Doppler shift, Doppler spread}

[0129] - 'QCL-TypeC': {Doppler shift, average delay}

[0130] - 'QCL-TypeD': {Spatial Rx parameter}

[0131] Figure 8 illustrates the antenna configuration and the port configuration within the panel.

[0132] Referring to FIG. 8, the antenna configuration (910) can be set for the first domain (1st domain) and the second domain (2nd domain), and TXRU virtualization can be applied in relation to the antenna configuration (910) in relation to the port configuration (920).

[0133] With respect to the antenna configuration (910), M represents the number of columns in the panel (i.e., the number of antenna ports in the first domain within the panel), N represents the number of rows in the panel (i.e., the number of antenna ports in the second domain within the panel), P represents polarization (1: co-pol, 2: X-pol), Mg represents the number of panels in the first domain, and Ng represents the number of panels in the second domain. Accordingly, the total number of antenna elements can be expressed as P*M*N*Mg*Ng. As an example, the antenna configuration (910) illustrated in FIG. 8 corresponds to [(M, N, P, Mg, Ng) = (4, 4, 2, 2, 2)]. In Fig. 8, dgH represents panel spacing in the first domain, dgV represents channel spacing in the second domain, dH represents antenna spacing in the first domain, and dV represents antenna spacing in the second domain.

[0134] With respect to the panel configuration (920), N1 represents the number of columns in the first domain (the number of antenna ports in the first domain within the panel), N2 represents the number of rows in the second domain (the number of antenna ports in the second domain within the panel), and P represents polarization (1: co-pol, 2: X-pol). Accordingly, the total number of CSI-RS ports in the panel can be expressed as P*N1*N2. For example, the panel configuration (920) illustrated in FIG. 8 corresponds to [(N1, N2, P) = (2, 2, 2)].

[0135] CSI Codebook

[0136] CSI codebooks defined in the NR standard (e.g., PMI codebooks) can be broadly categorized into Type I and Type II codebooks. For a deeper understanding of these codebooks, refer to Section 5.2.2.2 of TS 38.214 (incorporated by reference).

[0137] (1) Type I codebook

[0138] Type I codebooks primarily target Single User (SU)-MIMO, which supports both high-order and low-order signals. Type I codebooks can be divided into (i) single-panel codebooks and (ii) multi-panel codebooks. (i) A single-panel codebook may be based on the assumption that a terminal receives downlink transmissions from a single antenna panel. (ii) A multi-panel codebook may support base station configurations that use multiple (e.g., two or four) antenna panels. Unlike a single-panel codebook, which supports ranks 1 through 8, a multi-panel codebook can support ranks 1 through 4.

[0139] A Type I codebook can be configured with the selection of preferred DFT vector(s) from an oversampled DFT vector set as a spatial domain basis and the co-phase instructions for the cross polarization of the base station antenna.

[0140] As an example, the codeword vector for 1-layer transmission for a 1D array antenna can be defined based on mathematical expression 1.

[0141]

[0142] In mathematical expression 1, N represents the number of antenna elements included in the 1D antenna array, O represents an oversampling factor, and the index of the codebook vector l can be 0, 1, 2..., O*N-1.

[0143] Meanwhile, the precoder vector for a 2D antenna array can be defined based on the Kronecker product between two 1D array precoder vectors.

[0144] (2) Type II codebook

[0145] Type II codebooks can primarily support MI-MIMO, which supports up to two layers. Compared to Type I, Type II codebooks can provide more accurate CSI, but may increase signaling overhead. In a Type II codebook, the PMI can identify a set of beams and a set of amplitude coefficients. The amplitude coefficients can be used to generate a weighted sum of the beams. Type II codebooks can also identify the phase shift due to co-phasing between beams. Type II port selection codebooks can support wideband / long-term CSI (e.g., i1) and subband / short-term CSI (e.g., i2) reporting based on precoded (or beamformed) CSI-RSs when the base station knows information about the channel between the terminal and the base station.

[0146] For Type II codebooks, multiple DFT vectors are selected as SD basis, and the selected DFT vectors are linearly combined to achieve high resolution and excellent MU-MIMO performance.

[0147] Meanwhile, the enhanced Type II codebook was introduced to address the CSI overhead shortcomings of the existing Type II codebook by reducing the payload of the codebook by considering the correlation of the frequency axis.

[0148] Figure 9 is a diagram illustrating the structure of an enhanced Type II codebook.

[0149] Referring to Fig. 9, the precoding matrix W in the enhanced Type II codebook can be expressed as W = W1*W2*W3. W1 corresponds to the SD basis related to SD compression, W3 corresponds to the FD basis related to FD compression, and W2 corresponds to linear combining (LC) coefficients according to the FD compression of W3. When the terminal determines the matrix W as the PMI of the enhanced Type II, it reports the indices of W1, the coefficients of W2, and the indices of W3 to the network. The dimension of the matrix W is P(=2N1*N2)*N3, where W1 is P*2L, W2 is 2L*M, and W3 is N3*M. The terminal selects 2L basis beam vectors with respect to W1, M LC coefficients with respect to W2, and M FD basis vectors with respect to W3 (wherein each vector is an orthogonal DFT vector with a size of N3*1). L is the number of SD beams as a parameter for SD compression, which can be 2, 3, or 6. N3 and M are parameters for FD compression, where N3 is the DFT size for FD compression, and N3=N SB *It is expressed as R, where R is the granularity between CQI and PMI, which can be 1 or 2. M is the number of FD compression units, and is expressed as M = ceiling (p*(N3 / R)). The (L, p, β) parameter combination (paramCombination-r16) that defines enhanced Type II is as shown in Table 6.

[0150] paramCombination-r16LP v βυ ∈{1,2}υ ∈{3,4}121 / 41 / 81 / 4221 / 41 / 81 / 2341 / 41 / 81 / 4441 / 41 / 81 / 2541 / 41 / 43 / 4641 / 21 / 41 / 2

[0151] In Table 6, v corresponds to RI, and β is a parameter related to the upper limit of the LC coefficients selected by the terminal.

[0152] The enhanced Type II codebook vector constituting the l-th layer is expressed as in mathematical expression 2.

[0153]

[0154]

[0155] In Equation 2, l = 1, 2, 3, 4, and N1 and N2 represent the lengths of the first and second spatial domains (SD) of each base station (or each port group). v m1 (i) , m2 (j) (i=0,1,...,L-1) are L SD DFT vectors selected for linear combining (e.g., they can be 1-dimensional DFT vectors or 2-dimensional DFT vectors depending on the antenna geometry of each base station). The codebook vectors are determined by the parameters q1, q2, n1, and n2, which correspond to parameters introduced to select the optimal L beams among a total of Q1*N1*Q2*N2 beams (where Q1 and Q2 are oversampling factors for the first and second domains). n3 is a parameter introduced to select a frequency domain (FD) DFT basis. p l (1) , p l (2) corresponds to the amplitude coefficient. p l (1) is an indicator of a 4-bit quantization level, and is an indicator that indicates the relative amplitude through 4 bits based on the largest value among the strongest coefficients (p_ref) for each polarization for each layer (polarization with the strongest coefficient). p l(2) corresponds to an indicator indicating the relative amplitude of 3 bits based on p_ref within each polarity. The 4-bit phase coefficient indicator is i ,2,5,l and this is φ l,i,f is associated with . t represents the frequency domain index (t=0,...,N3-1, e.g., a group of PRBs or subbands), and y is a DFT vector of length-N3, which is the FD basis. t,l (f) Each element can correspond to Mv. Mv corresponds to the number of FD bases selected by the terminal among N3 FD bases.

[0156] CSI omission related actions

[0157] The NR standard provides that, if necessary, CSI part 2 of a two-part CSI can be omitted from the CSI report based on its priority value, which is called CSI omission.

[0158] Table 7 summarizes some of the CSI omissions on the PUCCH defined in Section 9.2.5.2 of the NR standard document TS38.213. For convenience, Table 7 only covers some of the details, but other details omitted from Table 7 may be incorporated by reference in Section 9.2.5.2.

[0159]

[0160]

[0161] Table 8 summarizes some of the priority value calculation methods defined in CSI part 2 of TS38.214.

[0162]

[0163] Table 9 shows a portion of the CSI omission content on PUSCH defined in Section 5.2.3 of TS38.214.

[0164]

[0165]

[0166] CSI priority for multiple CRI-based CSI reporting

[0167] In the following description, a channel measurement resource (CMR) may include a CSI-RS resource configured for channel measurement (e.g., non-zero power CSI-RS). An interference measurement resource (IMR) may include a CSI-RS resource configured for interference measurement (e.g., zero / non-zero power CSI-RS).

[0168] In Rel-19 NR MIMO or later standards, CSI supporting up to 128 CSI-RS ports in FR1 can be considered to increase system throughput of DL / UL and for more flexible MIMO operation.

[0169] a. Type-I codebook refinement supporting up to a total of 128 CSI-RS ports across all resources, assuming legacy CSI-RS resources (with up to 32 CSI-RS ports per resource), based on extension of legacy codebooks.

[0170] b. Type-II codebook refinement supporting up to a total of 128 CSI-RS ports across all resources, assuming legacy CSI-RS resources (with up to 32 CSI-RS ports per resource), based on extension of legacy codebooks, without modifying any codebook parameter other than introducing additional values ​​for the number of ports codebook parameter(s).

[0171] c. Extension of CRI(s)-based CSI reporting (CQI / PMI / RI calculated per CRI for ≥1 CRI) for hybrid beamforming supporting up to a total of 128 CSI-RS ports across all resources, with up to 32 CSI-RS ports per resource, without new codebook design.

[0172] According to the above item c, in the case of multiple CSI-RS resource indicator (CRI)-based CSI reporting, multiple CSIs according to multiple (analog) beamformings assumed by the base station can be reported from the terminal and utilized for scheduling for MU-MIMO. In addition, CSI reporting may be performed for multiple CMR / IMR combinations for MU-MIMO assumed by the base station. Unlike existing CSI reports, this multiple CRI-based CSI reporting entails multiple CSI measurement / calculation according to multiple CMR / IMR and corresponding multiple CSI reports. Therefore, existing CSI collision handling CSI priority rules and CSI omission rules must be changed or newly defined. Here, two CSIs are said to collide when the resources carrying the two CSIs overlap in the time / frequency axis. (Two CSI reports are said to collide if the time occupancy of the physical channels scheduled to carry the CSI reports overlap in at least one OFDM symbol and are transmitted on the same carrier.)

[0173] Accordingly, this specification proposes solutions to address issues related to CSI priority rules and CSI omission rules for CSI collision handling in multiple CRI-based CSI reporting.

[0174] Referring to Table 8, the smaller the PriiCSI(y,k,c,s) value calculated by the priority formula, the higher the priority, and the priority formula can be broadly divided into four steps of priority level calculation process. 1) First, it is based on the type of channel carrying the CSI (y value), and it has a high priority in the order of AP CSI on PUSCH > SP CSI on PUSCH > SP CSI on PUCCH > Periodic CSI on PUCCH. 2) Next, it is based on the priority according to the type of CSI (k value), and it has a high priority in the order of beam reporting related CSI > non-beam reporting related CSI depending on whether the CSI is beam reporting related CSI (whether L1-RSRP / SINR is included). 3) The next level is the cell index (c value), and 4) the next level is prioritized in the order of reportConfigID, through which the final priority value is determined.

[0175] In the case of Multiple CRI based CSI reporting, it can be composed of Part 1 CSI and Part 2 CSI similar to the existing legacy CSI. Part 1 CSI is mainly composed of CSIs that define / determine the payload of Part 2 CSI with a fixed payload, and representative examples include CRI / 1st CQI / RI / non-zero coefficient indicator (for Type 2 CSI). Part 2 CSI includes the remaining CSIs excluding the Part 1 CSI, and representative examples include 2nd CQI, LI, and PMI. In the case of Multiple CRI based CSI reporting, RI / CQI / PMI / LI, etc. are calculated / reported for each of the multiple CSIs selected / reported by CRI in a combination of CMR (group) and / or IMR, or some CSI elements can be commonly reported to multiple CMR (group) and / or IMR. For example, L resources corresponding to L CRIs are selected from multiple CMRs (groups) and / or IMRs, and the terminal can report L CRIs and L CSIs (1 CSI for each CRI (e.g., 2 part CSI)) at once through Multiple CRI based CSI reporting.

[0176] For example,

[0177] - Part 1 CSI may include at least CRI / RI / 1st CQI, or CRI may be considered as a higher level Part 0 CSI and used to determine the payload of Part 1 CSI. Here, RI or 1st CQI (WB CQI) may be calculated / reported as CMR (group) / IMR common or CMR (group) / IMR specific.

[0178] - Part 2 CSI may include at least 2nd CQI / LI / PMI, etc., where 2nd CQI (WB CQI) or WB PMI may be calculated / reported as CMR (group) / IMR common or CMR (group) / IMR specific.

[0179] For this type of Multiple CRI-based CSI reporting, we suggest having the following priorities:

[0180] Proposal 1

[0181] Multiple CRI based CSI reporting has the following CSI report priority values, PriiCSI(y,k,c,s).

[0182] (1) Alt 1: Multiple CRI-based reporting can have a higher priority than the existing normal CSI reporting. For example, Multiple CRI-based reporting can have the same priority as beam-related reporting, as in Option 1, or a lower priority than beam-related reporting, as in Option 2. Alt 1 can be expressed as the following formula:

[0183] 1) Option 1: Beam = Multiple CRI based CSI report > other CSI report

[0184] In this case, the CSI report priority value described in Table 8, the k value of PriiCSI(y,k,c,s), must be modified as follows.

[0185] - k= 0 for CSI reports carrying L1-RSRP or L1-SINR or multiple CRI (>1)

[0186] - k= 1 for CSI reports not carrying L1-RSRP or L1-SINR or multiple CRI (>1);

[0187] 2) Option 2: Beam > Multiple CRI based CSI report > other CSI report

[0188] PriiCSI(y,k,c,s) = 3*Ncells*Ms*y + Ncells*Ms*k + MS*c + s

[0189] - k=0 for CSI reports carrying multiple CRI (>1)

[0190] - k=1 for CSI reports carrying L1-RSRP or L1-SINR

[0191] - k=2 for CSI reports not carrying L1-RSRP or L1-SINR or multiple CRI (>1);

[0192] (2) Alt 2: As a priority of the report config level, in the case of Multiple CRI based CSI report, if it conflicts with the CSI report indicated based on the existing legacy CSI report config, it has a higher priority, and if it conflicts with LTM (lower layer triggered mobility)-CSI, it has a lower priority.

[0193] The reason why the multiple CRI based CSI report has the same priority as the beam related report even though it is not a beam related CSI report in option 1 is because the multiple CRI based CSI includes CSI reports for multiple beams implemented by the base station for MU-MIMO.

[0194] In option 2, multiple CRI reporting contains more information than other CSI reports (e.g., CSI reporting for multiple CMRs / IMRs), and since it is a CSI that triggers for the purpose of MU scheduling, it can be configured to have the highest priority among CSIs.

[0195] Alternatively, a new multiple CRI based CSI report config can be configured, for example, MCRI-CSI-ReportConfig can be configured. In this case, the priority of the report config level can be determined. For example, the following priority can be considered. LTM-CSI-ReportConfig → MCRI-CSI-ReportConfig → CSI-ReportConfig. Here, LTM-CSI refers to CSI reporting related to L1 / L2 triggered mobility. In case of Multiple CRI based CSI report, if it conflicts with CSI report indicated based on existing legacy CSI report config, Multiple CRI based CSI report has higher priority than CSI report set / reported with (legacy) CSI report config, and if it conflicts with LTM-CSI, Multiple CRI based CSI report has lower priority than CSI set / reported with LTM-CSI-ReportConfig.

[0196] The above proposal 1 defines a collision rule for the newly introduced Multiple CRI-based CSI reporting. Therefore, when multiple CSI reports containing Multiple CRI-based CSI collide, the base station and terminal can operate without ambiguity regarding CSI priority. For example, there may be an advantage in that the Multiple CRI-based CSI report, which contains relatively more information, is not dropped and is reported to the base station. From this perspective, the Multiple CRI-based CSI reporting may be limited to PUSCH-based CSI reporting.

[0197] Meanwhile, as previously discussed, in NR, when the amount of radio resources (e.g., PUSCH / PUCCH) set for CSI reporting is smaller than the CSI payload that the UE wants to report, instead of dropping the entire CSI, an operation is supported to omit some CSI to fit the available CSI payload size. The target of the CSI omission is Part 2 CSI. Part 1 CSI is mainly composed of CSIs that determine / define the payload of Part 2 CSI with fixed payload, and representative examples include CRI / 1st CQI / RI / non-zero coefficient indicator (for Type 2 CSI). Part 2 CSI includes the remaining CSIs excluding the Part 1 CSI, and representative examples may include 2nd CQI, LI, and PMI. In the case of the above multiple CRI based CSI reporting, RI / CQI / PMI / LI, etc. are calculated and reported respectively according to the combination of CMR (group) and / or IMR, and some CSI elements can be commonly reported to multiple CMR (group) and / or IMR.

[0198] Multiple CRI-based CSI reporting also needs to support this CSI omission, and to support this, the following is proposed.

[0199] Proposal 2

[0200] For multiple CRI based CSI reporting, the following Part 2 CSI omission rules are proposed.

[0201] In the description of Proposal 2, a high Priority may imply a low Omission Priority, and conversely, a low Priority may imply a high Omission Priority. A high Omission Priority may imply that a CSI omission is omitted first when it is performed.

[0202] (1) Method 1: When the number of CSIs calculated / reported by the terminal for multiple CMRs / IMRs is L, the L CSIs can be classified / distinguished into group 0 / 1 / 2 CSI (or WB CSI / even SB CSI / odd SB CSI) according to the codebook type, similar to the legacy CSI omission rule. Group 0 / 1 / 2 CSI (or WB / SB CSI) is sequentially encoded / mapped to UCI according to the priority (MCRI_priority) of the L CSIs. When CSI omission is performed, omission is performed in the order of group 2→1→0, similar to the legacy omission rule, and Part 2 CSI omission is performed in the order of MCRI_priority from low to high within the same group CSI.

[0203] (2) Method 2: When the number of CSIs calculated / reported by the terminal for multiple CMRs / IMRs is L, group 0 / 1 / 2 CSIs can be newly defined for the L CSIs. CSI omission is performed in the order of group 2→1→0, as in the legacy omission rule.

[0204] (3) Method 3: When the number of CSIs calculated / reported by the terminal for multiple CMRs / IMRs is L, the L CSIs can be classified / distinguished by newly defining group 0 / 1 / 2 / … / L-1 CSI according to MCRI_priority. When CSI omission is required, Part 2 CSI omission can be performed in the order of group L-1→L-2→… . →2→1→0.

[0205] (4) Method 4: When the number of CSIs calculated / reported by the terminal for multiple CMRs / IMRs is L, Part 2 CSI omission is performed by assigning different CSI omission priorities to the best N CSI reports (high priority) among the L and the remaining LN CSI reports (lower priority). A low CSI omission priority can be assigned to the best N CSI reports (high priority) among the L, and a high CSI omission priority can be assigned to the CSI reports (lower priority) for the remaining LN.

[0206] Below, Table 10 illustrates a more concrete example of Proposal 2, assuming that K (e.g., 8) CMRs are configured in CSI-ReportConfig or a new report config (e.g., MCRI-CSI-ReportConfig) as follows. The terminal assumes that only one IMR is common to all CMRs.

[0207] - CMR#1 = CSI-RS resource #1 - 32 port CSI-RS,- CMR#2 = CSI-RS resource #2 - 32 port CSI-RS,- CMR#3 = CSI-RS resource #3 - 32 port CSI-RS,- CMR#4 = CSI-RS resource #4 - 32 port CSI-RS,- CMR#5 = CSI-RS resource #5 - 32 port CSI-RS,- CMR#6 = CSI-RS resource #6 - 32 port CSI-RS,- CMR#7 = CSI-RS resource #7 - 32 port CSI-RS,- CMR#8 = CSI-RS resource #8 - 32 port CSI-RS,- IMR#1 = ZP CSI-RS resource #1

[0208] In the above example, it is assumed that the terminal selects four CMRs to report based on CRI, CMR#1, #3, #4, #7, and the best CMR (N=1) is CMR#3. Here, the criteria for selecting the best CMR can be based on metrics such as (e.g., RSRP / CQI / SINR / RI / Throughput) and / or a threshold (instructed / set by the base station). In addition, although the above example assumes a single ZP CSI-RS resource as an IMR, it can be extended to multiple ZP CSI-RS resources and / or NZP CSI-RS (CSI-IM). In this case, CRI selection is performed based on a pair of CMR (group) and IMR, and CSI reporting can be performed based on this. In addition, in the case of the transmission power setting of the plurality of CMRs (e.g., powerControlOffset: Power offset of PDSCH RE to NZP CSI-RS RE and / or powerControlOffsetSS: Power offset of NZP CSI-RS RE to SSS RE), it can be set / indicated resource (group) wise, and in the case of NZP CSI-RS based IMR (e.g., NZP CSI-IM), the higher layer parameter can be set / indicated resource wise.

[0209] Based on this example, we further explain Method 1 / 2 / 3 of Proposal 2. In the above example, we assume that the MCRI_priority corresponding to CMR#1, #3, #4, and #7 is given in the order of CMR#3, #1, #4, and #7.

[0210] (1) In Method 1, the CSI report index of the multiple CRI based CSI (MCRI CSI) report can be determined based on the calculation of the CSI priority value (i.e., PriiCSI(y,k,c,s)) including Proposal 1, and the CSI report index determined in this way is referred to as #n. Each group 0 / 1 / 2 CSI (or by WB / even SB / odd SB, hereinafter collectively referred to as group) of Part 2 CSI of CSI report # n is configured for each CMR, and the encoding / mapping order within each group is determined (from high to low) according to MCRI_priority. Here, the configuration of Part 2 CSI is based on the codebook type and / or parameter set by the base station. The definition of group 0 / 1 / 2 CSI is based on the codebook type and / or parameter.

[0211] Group 0 CSIs of CSI report #n belong to priority 0 in CSI omission priority (i.e., Table 5.2.3-1 of TS 38.214, extracted in Table 9), and are mapped / encoded (in UCI) in the order of MCRI_priority from highest to lowest in the nth order within priority 0: CMR #3 → CMR #1 → CMR#4 → CMR#7.

[0212] Group 1 CSIs of CSI report #n belong to CSI omission priority 2n-1, and group 1 CSIs corresponding to CMR #3 → CMR #1 → CMR#4 → CMR#7 in CSI omission priority 2n-1 are encoded sequentially.

[0213] Group 2 CSIs of CSI report #n belong to CSI omission priority 2n, and group 2 CSIs corresponding to CMR #3 → CMR #1 → CMR#4 → CMR#7 in CSI omission priority 2n are encoded sequentially.

[0214] Finally, the CSI omission order is from highest to lowest CSI omission priority value, i.e. priority 0 is omitted last.

[0215] Group 1 / 2 CSI of MCRI CSI is not omitted for the entire group at the group level, but CSI omission can be performed based on MCRI_priority for each MCRI CSI level within the group. In this case, the CSI omission order is as follows.

[0216] [CSI omission priority 2n] Group 2 CSI and / or odd SB CSI corresponding to CMR#7 →

[0217] [CSI omission priority 2n] Group 2 CSI and / or odd SB CSI corresponding to CMR#4 →

[0218] [CSI omission priority 2n] Group 2 CSI and / or odd SB CSI corresponding to CMR#1 →

[0219] [CSI omission priority 2n] Group 2 CSI and / or odd SB CSI corresponding to CMR#3 →

[0220] [CSI omission priority 2n-1] Group 1 CSI and / or even SB CSI corresponding to CMR#7 →

[0221] [CSI omission priority 2n-1] Group 1 CSI and / or even SB CSI corresponding to CMR#4 →

[0222] [CSI omission priority 2n-1] Group 1 CSI and / or even SB CSI of CSI corresponding to CMR#1 →

[0223] [CSI omission priority 2n-1] Group 1 CSI and / or even SB CSI corresponding to CMR#3 →

[0224] [CSI omission priority 2n-2] group 2 CSI of CSI report #n-1 →

[0225] [CSI omission priority 2n-3] group 1 CSI of CSI report #n-1 →

[0226] … ..

[0227] [CSI omission priority 0] CSI report 1 to #n group 0 CSI

[0228] In Method 1, information about MCRI_priority on multiple CSIs in multiple CRI-based CSI reporting can be included in Part 1 CSI and reported to the base station, or the base station can instruct the terminal through a higher layer. Alternatively, it can be determined based on an implicit rule, in the order of CMR ID (or CMR / IMR pair ID or CMR group ID) or in the order set in report_config. For the convenience of the following explanation, it is assumed that MCRI_priority is a value explicitly reported above or a priority value determined by an implicit rule.

[0229] (2) Method 2 follows the existing legacy rule, but redefines group 0 / 1 / 2 CSI differently from method 1. For example, in Table 10, group 0 CSI can be composed of CSI corresponding to CMR#3, group 1 CSI can be composed of CSI corresponding to CMR#1, and group 2 CSI can be composed of CSI corresponding to CMR#4 and #7. The UE can report to the base station which CSIs belong to which groups by including them in the CSI report (for example, including them in part 1 CSI). Alternatively, the base station can set / instruct the UE to set / instruct the CSI according to the corresponding CMR (and / or IMR) to group 0 / 1 / 2 CSI through a higher layer. If the CSI(s) belonging to a specific group are not selected for the CRI selection of the UE, the corresponding group CSI is regarded as non-existent, and the corresponding CSI omission priority is skipped during the CSI omission of the UE.

[0230] As another example of Method 2, the configuration for group 0 of CSI report #n can be performed by separating L group 0 CSIs into group 1 / 2 CSIs according to Method 1 (sequentially mapping / encoding L group 0 CSIs (to UCI) based on MCRI_priority), excluding group 0 CSI from L CSIs according to CMR (and / or IMR pair), and performing legacy part 2 CSI omission. Method 2 has the advantage of being able to reuse legacy part 2 CSI omission as it is.

[0231] (3) As an example of Method 3 (extending the group in Method 2), each group and MCRI CSI are mapped 1:1 based on MCRI_priority. For example, in Table 10, group 0 CSI can be configured as CSI corresponding to CMR#3, group 1 CSI as CSI corresponding to CMR#1, group 2 CSI as CSI corresponding to CMR#4, and group 3 CSI as CSI corresponding to CMR#7. Then, group 0 CSI of CSI report #n belongs to CSI omission priority 0, and the remaining group 1 CSI to group 3 CSI belong to CSI omission priortiy 2n-1, priority 2n, priority 2n+1, and omission is performed in the order of highest CSI omission priority.

[0232] Generalizing the above example, in CSI report #n, which is MCRI-based CSI, each of the L CSIs can belong to L groups 0 to L-1, where group 0 CSI belongs to CSI omission priority 0, and group 1 CSI to group L-1 CSI are mapped to CSI omission priority 2n-1 to CSI omission priority 2n+L-2.

[0233] As another example of Method 3, the configuration for group 0 of CSI rerport #n is performed based on Method 1 (sequential mapping / encoding (to UCI) of L group 0 CSIs based on MCRI_priority), but each of the L CSIs according to CMR (and / or IMR pair) except group 0 CSI is defined as group 1 / 2 / 3 / … L CSI. The mapping order is based on MCRI_priority. Then, CSI rerport #n, which is a CSI, performs L-level CSI omission. That is, group 1 CSI to group L CSI are mapped from CSI omission priority 2n-1 to CSI omission priority 2n+L-1, and part 2 CSI omission is performed.

[0234] For example, (i) L CRIs and (ii) L CSIs associated with the L CRIs may be included in an M CRI based CSI report. In this case, the L CSIs may be assigned MCRI_priority according to the associated CRI, and the order (placement / sorting order) in which the L CSIs are included / omitted in the report may be determined according to the MCRI_priority.

[0235] As a specific example of Method 3, we can consider the placement / sorting / omission priority methods as in Examples 1 and 2 of Table 11. In Examples 1 and 2, the description of Group 0 is omitted.

[0236] Example 1) ...Group 1 CSI of even subbands for the highest priority CRI Group 2 CSI of odd subbands for the highest priority CRI Group 1 CSI of even subbands for the second highest priority CRI Group 2 CSI of odd subbands for the second highest priority CRI ...,Lth group 1 CSI of even subbands for the even highest priority CRI Group 2 CSI of odd subbands for the Lth highest priority CRI Example 2) ...Group 1 PMI component for the highest priority CRI Group 2 PMI component for the highest priority CRI Group 1 PMI component for the second highest priority CRI Group 2 PMI component for the second highest priority CRI ...,Lth group 1 PMI component for the Lth highest priority CRI Group 2 PMI component for the Lth highest priority CRI

[0237] (4) In Method 4, MCRI CSIs can be divided into two priorities, and different CSI omission priorities can be assigned to each priority. In the example of Table 10, if N = 1, the CMR corresponding to 1 is CMR#3, which belongs to high priority CSI. These high priority CSI(s) can, for example, follow legacy CSI omission (and omission priority). For example, if MCRI CSI is CSI report #n, and for the CSI report corresponding to CMR#3, omission for CSI report #n can be performed based on legacy, and omission for CSI report #n can be performed based on legacy Part 2 CSI omission. In addition, for CSI corresponding to CMR#1,#4,#7, the CSI omission priority corresponding to CSI report #n+X can be set, not the CSI omission priority for CSI report #n. Here, the value X can be a value set by the base station or can be agreed upon in advance. For example, if there are M CSI report indices reported on PUSCH (or PUCCH), (e.g., CSI report#1, #2, … #n, #n+1, …. #M), the value of X can be set or promised to be the same as CSI report #M+1 for CSI corresponding to CMR#1,#4,#7. In other words, MCRI CSIs with lower priority have lower CSI omission priority than M CSI reports when there are M CSI reports on PUSCH (or PUCCH). For convenience, this is described for the case where N=1, but can also be extended to the case where N>1.For example, if N=2, two CSI reports are mapped / encoded (in UCI) as CSI corresponding to CSI report #n in an order determined by priority or other rule-based order, and CSI omission can be performed following legacy CSI omission rule or based on Method 1.

[0238] As another example of Method 4, for group 0 CSIs of MCRI CSI, the same configuration as Method 1 is used, and based on CSIs excluding group 0 CSI, Best N CSI with high priority and LN CSI with low priority are configured, so that the CSI omission rule of the embodiment of Method 4 can be followed.

[0239] Proposal 2 described above is a method in which a terminal measures a channel / interference based on multiple CMRs / IMRs based on base station settings and reports multiple CRIs / CSIs in a manner set by the base station. In this case, if there are more CSI payloads to report than the PUCCH / PUSCH payload set by the base station for the CSI report, CSI omission is performed. For example, this is an operation in which the terminal, after completing calculations for L or M CSI reports, omit the CSI calculated to fit the PUCCH / PUSCH payload.

[0240] Another way is to have the terminal select the M value so that it does not calculate redundant CSI (CSI omitted or CSI dropped) based on conditions based on the PUSCH / PUCCH payload and / or target rate. For example, the M value can be determined before calculating the entire CSI (e.g., CRI / RI / CQI / PMI), and CSI reporting corresponding to the M value can be performed. One way to determine the M value is to set / indicate a reference payload value for a CSI report to a higher layer. For example, the (maximum) allowable CSI payload per CSI report can be set / indicated in the CSI report config. Then, the terminal can determine the M value based on the payload, and report the CMR / IMR corresponding to the M value as CRI, etc. As an example of the above method, if the (maximum) allowable CSI payload per CSI is set to 100 bits and the PUSCH / PUCCH payload scheduled for CSI reporting is set to 250 bits, the terminal can determine up to 2 (M=2) to perform CRI reporting and 2 RI / CQI / PMI reports.

[0241] In the case of the above-described proposal 2 methods 1 / 2 / 3 / 4, it is proposed to sequentially omit the part related to SB CSI of Part 2 CSI or the part related to group 1,2 CSI in units of CSI omission priority, and to omit the part corresponding to group 0 or WB CSI at once.

[0242] In addition to the above proposal 2 methods 1 / 2 / 3 / 4, group 0 / WB CSI can also perform omission according to the order of CSI reports. For example, if all other priorities are omitted and only CSI omission priority 0 remains, rather than deciding whether to drop the entire priority 0, omission is sequentially performed in the order of the CSI report index within priority 0 from the largest to the smallest. For example, when MCRI-based CSI reporting corresponds to CSI report #n, in the omission order of the CSI report #n, group 0 CSI / WB CSI can sequentially perform CSI omission based on MCRI_priority until it is suitable for the payload set by the base station.

[0243] Although the CSI omission of Proposal 2 is explained based on CSI on PUSCH, it can also be extended to CSI on PUCCH (e.g., Table 7). Primarily, in the case of CSI on PUCCH, it can be applied to Type 1 CSI, and when MCRI-based CSI reporting on PUCCH is applied, as described in section 9.2.5.2 of TS 38.213, Proposals 1 and 2 can be applied. More specifically, the CSI omission can be applied to CSI reporting on PUCCH using either the CSI priority of Proposal 1 or the CSI omission decision methods 1 / 2 / 3 / 4 of Proposal 2, either alone or in combination.

[0244] Although the above proposal is an invention for MCRI based CSI reporting, the above proposals 1 / 2 can also be applied to cases where multiple CSI-RS resources are aggregated to perform single / multiple CSI reporting for a single large aggregated channel (e.g., 32 port CSI-RS + 32 port CSI-RS = 64 port CSI-RS or 32 port CSI-RS * 4 = 128 port CSI-RS).

[0245] Figure 10 is a diagram illustrating a method for a terminal to report CSI to a network based on at least some of Proposals 1 / 2. Some of the terminal / base station operations illustrated in Figure 10 may be omitted depending on the embodiment.

[0246] Referring to FIG. 10, a terminal may transmit a UE Capability report (1005). The UE Capability report may include, but is not limited to, at least one of the maximum number of CSI-RS resources that the terminal can support, the number of CSI-RS ports, the total number of CSI-RS ports that can be simultaneously supported, and / or the number of Rx antenna groups.

[0247] A terminal may receive configuration information from a base station via upper layer signaling (1010). The configuration information may include configuration information related to CSI-RS transmission and / or CSI reporting.

[0248] The base station can transmit a CSI-RS to the terminal (1015). The terminal can measure / predict / calculate CSI based on the CSI-RS (1020).

[0249] The base station can generate a CSI report based on the CSI (1025). At this time, the terminal can generate the CSI report by performing a CSI omission based on configuration information and / or CSI priority.

[0250] The terminal can transmit a CSI report (1030).

[0251] The terminal can receive scheduling information of a downlink channel (e.g., PDCCH, PDSCH) from the base station (1035).

[0252] The terminal can receive a scheduled downlink channel / signal from the base station (1040).

[0253] FIG. 11 illustrates a flow of a method performed by a terminal according to one embodiment.

[0254] Referring to FIG. 11, a terminal can receive information about CSI (channel state information) reporting settings through upper layer signaling (1105).

[0255] A terminal can acquire CSI based on multiple CSI-RS (CSI-reference signal) resources (1110). The acquired CSI may include multiple Part-2 CSIs linked to the multiple CRIs.

[0256] The terminal may transmit a CSI report related to a plurality of CRIs (CSI-RS resource indicators) based on the CSI (1115). The sort order of the plurality of Part-2 CSIs within the CSI report may be determined based on the plurality of CRIs.

[0257] Some of the plurality of Part-2 CSIs may be omitted from the CSI report. The omission priority of each of the plurality of Part-2 CSIs may be determined based on the plurality of CRIs.

[0258] Among the above multiple CRIs, the Part-2 CSI associated with the CRI with the lowest priority may have the highest omission priority.

[0259] The above plurality of Part-2 CSIs may be related to a plurality of groups, including a first group and a second group. The second group may have a higher omission priority than the first group.

[0260] Part-2 CSI linked to the CRI with the highest priority among the above multiple CRIs may be included in the above CSI report.

[0261] CSI reports related to the above multiple CRIs may have the same priority as CSI reports including L1-RSRP (layer 1-reference signal received power) or L1-SINR (layer 1-signal to interference plus noise ratio).

[0262] CSI reports related to the above multiple CRIs may have a higher priority than the remaining CSI reports except for CSI reports including L1-RSRP (layer 1-reference signal received power) or L1-SINR (layer 1-signal to interference plus noise ratio).

[0263] The above CSI report can be transmitted via PUSCH (physical uplink shared channel).

[0264] FIG. 12 illustrates a flow of a method performed by a base station according to one embodiment.

[0265] Referring to FIG. 12, the base station can transmit information on CSI (channel state information) reporting settings to the terminal through upper layer signaling (1205).

[0266] The base station can transmit a CSI-RS (CSI-reference signal) based on multiple CSI-RS resources (1210).

[0267] The base station may receive a CSI report related to a plurality of CRIs (CSI-RS resource indicators) from the terminal (1215). The CSI report may include a plurality of Part-2 CSIs linked to the plurality of CRIs. The sort order of the plurality of Part-2 CSIs within the CSI report may be determined based on the plurality of CRIs.

[0268] The sort order of the multiple part-2 CSIs may be related to the omission priority of each of the multiple part-2 CSIs.

[0269] Among the above multiple CRIs, the Part-2 CSI associated with the CRI with the lowest priority may have the highest omission priority.

[0270] The above plurality of Part-2 CSIs may be related to a plurality of groups, including a first group and a second group. The second group may have a higher omission priority than the first group.

[0271] Part-2 CSI linked to the CRI with the highest priority among the above multiple CRIs may be included in the above CSI report.

[0272] CSI reports related to the above multiple CRIs may have the same priority as CSI reports including L1-RSRP (layer 1-reference signal received power) or L1-SINR (layer 1-signal to interference plus noise ratio).

[0273] CSI reports related to the above multiple CRIs may have a higher priority than the remaining CSI reports except for CSI reports including L1-RSRP (layer 1-reference signal received power) or L1-SINR (layer 1-signal to interference plus noise ratio).

[0274] The above CSI report can be received via PUSCH (physical uplink shared channel).

[0275] Fig. 13 illustrates a communication system (1) applicable to the present disclosure.

[0276] 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.

[0277] 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).

[0278] 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.

[0279] Figure 14 illustrates a wireless device applicable to the present disclosure.

[0280] 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.

[0281] 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.

[0282] 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.

[0283] 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.

[0284] 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.

[0285] 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.

[0286] 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.

[0287] Figure 15 illustrates another example of a wireless device applicable to the present invention. The wireless device may be implemented in various forms depending on the use case / service (see Figure 13).

[0288] Referring to FIG. 15, the wireless device (100, 200) corresponds to the wireless device (100, 200) of FIG. 14 and may be composed of various elements, components, units / units, and / or modules. For example, the wireless device (100, 200) may include a communication unit (110), a control unit (120), a memory unit (130), and an additional element (140). The communication unit may include a communication circuit (112) and a transceiver(s) (114). For example, the communication circuit (112) may include one or more processors (102, 202) and / or one or more memories (104, 204) of FIG. 14. For example, the transceiver(s) (114) may include one or more transceivers (106, 206) and / or one or more antennas (108, 208) of FIG. 14. The control unit (120) is electrically connected to the communication unit (110), the memory unit (130), and the additional elements (140) and controls the overall operation of the wireless device. For example, the control unit (120) may control the electrical / mechanical operation of the wireless device based on the program / code / command / information stored in the memory unit (130). In addition, the control unit (120) may transmit information stored in the memory unit (130) to an external device (e.g., another communication device) via a wireless / wired interface through the communication unit (110), or store information received from an external device (e.g., another communication device) via a wireless / wired interface in the memory unit (130).

[0289] The additional element (140) may be configured in various ways depending on the type of the wireless device. For example, the additional element (140) may include at least one of a power unit / battery, an input / output unit (I / O unit), a driving unit, and a computing unit. Although not limited thereto, the wireless device may be implemented in the form of a robot (Fig. 13, 100a), a vehicle (Fig. 13, 100b-1, 100b-2), an XR device (Fig. 13, 100c), a portable device (Fig. 13, 100d), a home appliance (Fig. 13, 100e), an IoT device (Fig. 13, 100f), a digital broadcasting terminal, a hologram device, a public safety device, an MTC device, a medical device, a fintech device (or a financial device), a security device, a climate / environmental device, an AI server / device (Fig. 13, 400), a base station (Fig. 13, 200), a network node, etc. Wireless devices may be mobile or stationary depending on the use / service.

[0290] In FIG. 15, various elements, components, units / parts, and / or modules within the wireless device (100, 200) may be entirely interconnected via a wired interface, or at least some may be wirelessly connected via a communication unit (110). For example, within the wireless device (100, 200), the control unit (120) and the communication unit (110) may be wired, and the control unit (120) and a first unit (e.g., 130, 140) may be wirelessly connected via the communication unit (110). In addition, each element, component, unit / part, and / or module within the wireless device (100, 200) may further include one or more elements. For example, the control unit (120) may be composed of a set of one or more processors. For example, the control unit (120) may be composed of a set of a communication control processor, an application processor, an electronic control unit (ECU), a graphics processing processor, a memory control processor, etc. As another example, the memory unit (130) may be composed of RAM (Random Access Memory), DRAM (Dynamic RAM), ROM (Read Only Memory), flash memory, volatile memory, non-volatile memory, and / or a combination thereof.

[0291] Figure 16 illustrates a vehicle or autonomous vehicle applicable to the present disclosure. The vehicle or autonomous vehicle may be implemented as a mobile robot, a car, a train, a manned or unmanned aerial vehicle (AV), a ship, or the like.

[0292] Referring to FIG. 16, a vehicle or autonomous vehicle (100) may include an antenna unit (108), a communication unit (110), a control unit (120), a driving unit (140a), a power supply unit (140b), a sensor unit (140c), and an autonomous driving unit (140d). The antenna unit (108) may be configured as a part of the communication unit (110). Blocks 110 / 130 / 140a to 140d correspond to blocks 110 / 130 / 140 of FIG. 15, respectively.

[0293] The communication unit (110) can transmit and receive signals (e.g., data, control signals, etc.) with external devices such as other vehicles, base stations (e.g., base stations, road side units, etc.), and servers. The control unit (120) can control elements of the vehicle or autonomous vehicle (100) to perform various operations. The control unit (120) can include an ECU (Electronic Control Unit). The drive unit (140a) can drive the vehicle or autonomous vehicle (100) on the ground. The drive unit (140a) can include an engine, a motor, a power train, wheels, brakes, a steering device, etc. The power supply unit (140b) supplies power to the vehicle or autonomous vehicle (100) and can include a wired / wireless charging circuit, a battery, etc. The sensor unit (140c) can obtain vehicle status, surrounding environment information, user information, etc. The sensor unit (140c) may include an IMU (inertial measurement unit) sensor, a collision sensor, a wheel sensor, a speed sensor, an incline sensor, a weight detection sensor, a heading sensor, a position module, a vehicle forward / backward sensor, a battery sensor, a fuel sensor, a tire sensor, a steering sensor, a temperature sensor, a humidity sensor, an ultrasonic sensor, an illuminance sensor, a pedal position sensor, etc. The autonomous driving unit (140d) may implement a technology for maintaining a driving lane, a technology for automatically controlling speed such as adaptive cruise control, a technology for automatically driving along a set path, a technology for automatically setting a path and driving when a destination is set, etc.

[0294] For example, the communication unit (110) can receive map data, traffic information data, etc. from an external server. The autonomous driving unit (140d) can generate an autonomous driving route and driving plan based on the acquired data. The control unit (120) can control the drive unit (140a) so that the vehicle or autonomous vehicle (100) moves along the autonomous driving route according to the driving plan (e.g., speed / direction control). During autonomous driving, the communication unit (110) can irregularly / periodically acquire the latest traffic information data from an external server and can acquire surrounding traffic information data from surrounding vehicles. In addition, during autonomous driving, the sensor unit (140c) can acquire vehicle status and surrounding environment information. The autonomous driving unit (140d) can update the autonomous driving route and driving plan based on newly acquired data / information. The communication unit (110) can transmit information regarding the vehicle location, autonomous driving route, driving plan, etc. to the external server. External servers can predict traffic information data in advance using AI technology or other technologies based on information collected from vehicles or autonomous vehicles, and provide the predicted traffic information data to the vehicles or autonomous vehicles.

[0295] 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.

[0296] 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.

[0297] The present disclosure may 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 information about channel state information (CSI) reporting settings via upper layer signaling; Acquiring CSI based on multiple CSI-RS (CSI-reference signal) resources; and Including transmitting a CSI report related to a plurality of CRIs (CSI-RS resource indicators) based on the above CSI, The above-mentioned acquired CSI includes a plurality of part-2 CSIs linked to the plurality of CRIs, A method wherein the sorting order of the plurality of part-2 CSIs within the CSI report is determined based on the plurality of CRIs.

2. In paragraph 1, Some of the above multiple Part-2 CSIs are omitted from the CSI report; A method wherein the omission priority of each of the plurality of part-2 CSIs is determined based on the plurality of CRIs.

3. In paragraph 2, A method wherein the Part-2 CSI associated with the CRI with the lowest priority among the above multiple CRIs has the highest omission priority.

4. In paragraph 2, The above plurality of Part-2 CSIs relate to a plurality of groups including a first group and a second group, A method wherein the second group has a higher omission priority than the first group.

5. In paragraph 1, A method in which the Part-2 CSI associated with the CRI with the highest priority among the above multiple CRIs is included in the CSI report.

6. In paragraph 1, A method wherein the CSI report related to the above plurality of CRIs has the same priority as the CSI report including L1-RSRP (layer 1-reference signal received power) or L1-SINR (layer 1-signal to interference plus noise ratio).

7. In paragraph 1, A method in which CSI reports related to the above-mentioned plurality of CRIs have a higher priority than the remaining CSI reports except for CSI reports including L1-RSRP (layer 1-reference signal received power) or L1-SINR (layer 1-signal to interference plus noise ratio).

8. In paragraph 1, A method in which the above CSI report is transmitted via a PUSCH (physical uplink shared channel).

9. A non-transitory computer-readable recording medium having recorded thereon a program for performing the method described in paragraph 1.

10. In the device, a memory configured to store instructions; and A processor configured to perform operations by executing the above instructions, The operations of the above processor are: Receive information about channel state information (CSI) reporting settings via upper layer signaling; Acquiring CSI based on multiple CSI-RS (CSI-reference signal) resources; and Including transmitting a CSI report related to a plurality of CRIs (CSI-RS resource indicators) based on the above CSI, The above-mentioned acquired CSI includes a plurality of part-2 CSIs linked to the plurality of CRIs, A device wherein the sorting order of the plurality of part-2 CSIs within the CSI report is determined based on the plurality of CRIs.

11. In paragraph 10, Including a transmitter and receiver, The above device is a terminal in a wireless communication system.

12. In paragraph 10, The above device is a processing device configured to control a terminal in a wireless communication system.

13. In a method performed by a base station, Transmit information about CSI (channel state information) reporting settings to the terminal via upper layer signaling; Transmitting CSI-RS based on multiple CSI-RS (CSI-reference signal) resources; and Including receiving a CSI report related to a plurality of CRI (CSI-RS resource indicators) from the terminal, The above CSI report includes multiple Part-2 CSIs linked to the multiple CRIs, A method wherein the sorting order of the plurality of part-2 CSIs within the CSI report is determined based on the plurality of CRIs.

14. A non-transitory computer-readable recording medium having recorded thereon a program for performing the method described in Article 13.

15. At the base station, a memory configured to store instructions; and A processor configured to perform operations by executing the above instructions, The operations of the above processor are: Transmit information about CSI (channel state information) reporting settings to the terminal via upper layer signaling; Transmitting CSI-RS based on multiple CSI-RS (CSI-reference signal) resources; and Including receiving a CSI report related to a plurality of CRI (CSI-RS resource indicators) from the terminal, The above CSI report includes multiple Part-2 CSIs linked to the multiple CRIs, A base station, wherein the sorting order of the plurality of part-2 CSIs within the CSI report is determined based on the plurality of CRIs.

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