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

Abstract

The method and apparatus for transmitting and receiving signals in a wireless communication system disclosed herein omits transmission of part 2 CSI according to priority levels, which may be subdivided based on sub-configuration levels.

Description

[Technical Field]

[0001] The present invention relates to a method and apparatus for use in a wireless communication system. [Background technology]

[0002] Wireless communication systems have been widely deployed to provide various communication services such as voice and data. Generally, wireless communication systems are multiple access systems that support communication with multiple users by sharing available system resources (such as bandwidth and transmission power). Examples of multiple access systems include Code Division Multiple Access (CDMA) systems, Frequency Division Multiple Access (FDMA) systems, Time Division Multiple Access (TDMA) systems, Orthogonal Frequency Division Multiple Access (OFDMA) systems, and Single Carrier Frequency Division Multiple Access (SC-FDMA) systems. Summary of the Invention [Problem to be solved by the invention]

[0003] A technical problem to be solved by the present invention is to provide a signal transmission / reception method and apparatus for efficiently transmitting and receiving reference signals and measurement reports in a wireless communication system.

[0004] The technical object of the present invention is not limited to the above-mentioned technical object, and other technical objects can be inferred from the embodiments of the present invention. [Means for solving the problem]

[0005] The present invention provides a method and apparatus for transmitting and receiving signals in a wireless communication system.

[0006] According to one aspect of the present invention, there is provided a method for transmitting and receiving signals by a terminal in a wireless communication system, comprising the steps of: receiving a CSI (Channel State Information) reporting configuration; and transmitting a CSI report based on a measurement result for the CSI-RS; wherein for the CSI reports, each CSI report includes Part 1 CSI and Part 2 CSI, and the Part 2 CSI includes Group 0 CSI, Group 1 CSI, and Group 2 CSI, different priority levels are determined for the Group 0 CSI, the Group 1 CSI, and the Group 2 CSI, and omission of Part 2 CSI from the first CSI report is performed at a lower-configuration level within the same priority level based on a first CSI reporting configuration including a lower-configuration among the CSI reporting configurations corresponding to a first CSI report including a lower-configuration, and omission of Part 2 CSI from the second CSI report is performed for all information of a specific priority level based on a second CSI reporting configuration not including a lower-configuration among the CSI reporting configurations corresponding to a second CSI report not including a lower-configuration.

[0007] In another aspect of the present invention, there is provided an apparatus, a processor and a storage medium for carrying out the signal transmission and reception method.

[0008] The device includes an autonomous vehicle capable of communicating with at least a terminal, a network, and other autonomous vehicles other than the device.

[0009] The above-described aspects of the present invention are merely some of the preferred embodiments of the present invention, and various embodiments reflecting the technical features of the present invention will be apparent to those skilled in the art based on the detailed description of the present invention below. [Effects of the Invention]

[0010] According to one embodiment of the present invention, when reference signals and measurement reports are transmitted and received between communication devices, there is an advantage that more efficient signal transmission and reception can be achieved through operations differentiated from conventional inventions.

[0011] The technical effects of the present invention are not limited to the above-mentioned technical effects, and other technical effects may be inferred from the embodiments of the present invention. [Brief explanation of the drawings]

[0012] [Figure 1] FIG. 1 is a diagram illustrating the structure of a radio frame. [Figure 2] FIG. 1 illustrates a resource grid of slots. [Figure 3] FIG. 1 is a diagram showing an example of mapping physical channels within a slot. [Figure 4-6] 1 is a diagram illustrating a signal transmission and reception method according to an embodiment of the present invention. [Figure 7-10] 1 illustrates an apparatus according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0013] The following technologies can be used for various wireless access systems, such as CDMA, FDMA, TDMA, OFDMA, SC-FDMA, etc. CDMA can be implemented by radio technologies such as UTRA (Universal Terrestrial Radio Access) and CDMA2000. TDMA can be implemented by radio technologies such as GSM (Global System for Mobile communications), GPRS (General Packet Radio Service), and EDGE (Enhanced Data Rates for GSM Evolution). OFDMA can be implemented by radio technologies such as IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802-20, E-UTRA (Evolved UTRA), etc. UTRA is part of UMTS (Universal Mobile Telecommunications System). 3GPP (3rd Generation Partnership Project: registered trademark; the same applies hereinafter) LTE (long term evolution) is a part of E-UMTS (Evolved UMTS) that uses E-UTRA, and LTE-A / LTE-A pro are evolved versions of 3GPP LTE. 3GPP NR (New Radio or New Radio Access Technology) is an evolved version of 3GPP LTE / LTE-A / LTE-A pro.

[0014] For clarity, the following description will be based on a 3GPP communication system (e.g., LTE-A, NR), but the technical concept of the present invention is not limited thereto. LTE refers to technology from 3GPP TS 36.xxx Release 8 onward. Specifically, LTE technology from 3GPP TS 36.xxx Release 10 onward is called LTE-A, and LTE technology from 3GPP TS 36.xxx Release 13 onward is called LTE-A pro. 3GPP NR refers to technology from TS 38.xxx Release 15 onward. LTE / NR can also be referred to as a 3GPP system. "xxx" refers to the specific number of the standard document. LTE / NR is collectively referred to as a 3GPP system. For background technology, terms, abbreviations, etc. used in the description of the present invention, please refer to the matters described in standard documents published before the present invention. For example, the following documents may be referenced:

[0015] 3GPP NR

[0016] - 38.211: Physical channels and modulation

[0017] - 38.212: Multiplexing and channel coding

[0018] - 38.213: Physical layer procedures for control

[0019] - 38.214: Physical layer procedures for data

[0020] - 38.300: NR and NG-RAN Overall Description

[0021] - 38.331: Radio Resource Control (RRC) protocol specification

[0022] FIG. 1 is a diagram illustrating the structure of a radio frame used in NR.

[0023] In NR, uplink and downlink transmissions are composed of frames. A radio frame has a length of 10 ms and is defined as two 5 ms half-frames (HF). A half-frame is defined as five 1 ms subframes (SF). A subframe is divided into one or more slots, and the number of slots in a subframe depends on the subcarrier spacing (SCS). Each slot contains 12 or 14 OFDM(A) symbols depending on the cyclic prefix (CP). If a general CP is used, each slot contains 14 symbols. If an extended CP is used, each slot contains 12 symbols. Here, a symbol can include an OFDM symbol (or a CP-OFDM symbol) or an SC-FDMA symbol (or a DFT-s-OFDM symbol).

[0024] Table 1 illustrates that when a general CP is used, the number of symbols per slot, the number of slots per frame, and the number of slots per subframe change depending on the SCS.

[0025] [Table 1]

[0026] Table 2 illustrates how the number of symbols per slot, the number of slots per frame, and the number of slots per subframe change depending on the SCS when an extended CP is used.

[0027] [Table 2]

[0028] In an NR system, multiple cells merged to one user equipment (UE) are configured to have different OFDM(A) pneumatics (e.g., SCS, CP length, etc.), which results in different (absolute time) durations of time resources (e.g., SF, slot, or TTI) (collectively referred to as TU (Time Unit) for convenience) consisting of the same number of symbols.

[0029] NR supports multiple Orthogonal Frequency Division Multiplexing (OFDM) pneumonologies (e.g., subcarrier spacing, SCS) to support various 5G services. For example, a 15 kHz SCS supports wide areas in traditional cellular bands, while a 30 kHz / 60 kHz SCS supports dense urban areas, lower latency, and wider carrier bandwidths.

[0030] The NR frequency band is defined by two types of frequency ranges (FR) (FR1 / FR2). FR1 / FR2 are configured as shown in Table 3 below. FR2 also stands for millimeter wave (mmW).

[0031] [Table 3]

[0032] FIG. 2 is a diagram illustrating the slot structure of an NR frame.

[0033] A slot contains multiple symbols in the time domain. For example, in the case of a general CP, one slot contains 14 symbols, while in the case of an extended CP, one slot contains 12 symbols. A carrier contains multiple subcarriers in the frequency domain. An RB (Resource Block) is defined as multiple (e.g., 12) consecutive subcarriers in the frequency domain. Multiple RB interlaces (or simply, interlaces) are defined in the frequency domain. Interlace m ∈ {0, 1, ..., M-1} consists of (common) RBs {m, M+m, 2M+m, 3M+m, ...}, where M represents the number of interlaces. A BWP (Bandwidth Part) is defined as multiple consecutive PRBs (Physical RBs) in the frequency domain and can correspond to one numerology (e.g., SCS, CP length, etc.). A carrier contains up to N BWPs (e.g., 5). Data communication is performed using activated BWPs, and only one BWP can be activated for one terminal. Each element in the resource grid is called a resource element (RE), and one modulation symbol can be mapped to it.

[0034] In a wireless communication system, a terminal receives information from a base station via a downlink (DL), and the terminal transmits information to the base station via an uplink (UL). Information exchanged between the base station and the terminal includes data and various control information, and various physical channels / signals exist depending on the type / purpose of the information exchanged. A physical channel corresponds to a set of resource elements (RE) that carry information derived from a higher layer. A physical signal corresponds to a set of resource elements (RE) used by a physical layer (PHY), but does not carry information derived from a higher layer. Higher layers include the Medium Access Control (MAC) layer, Radio Link Control (RLC) layer, Packet Data Convergence Protocol (PDCP) layer, and Radio Resource Control (RRC) layer.

[0035] DL physical channels include PBCH (Physical Broadcast channel), PDSCH (Physical Downlink Shared channel), and PDCCH (Physical Downlink Control channel). DL physical signals include DL RS (Reference Signal), PSS (Primary synchronization signal), and SSS (Secondary synchronization signal). DL RSs include DM-RS (Demodulation RS), PT-RS (Phase-tracking RS), and CSI-RS (Channel-state information RS). UL physical channels include PRACH (Physical Random Access Channel), PUSCH (Physical Uplink Shared Channel), and PUCCH (Physical Uplink Control Channel). UL physical signals include UL RSs. UL RSs include DM-RS, PT-RS, and SRS (Sounding RS).

[0036] FIG. 3 is a diagram showing an example of mapping physical channels into slots.

[0037] A single slot contains the DL control channel, DL or UL data, and UL control channel. For example, the first N symbols in a slot are used to transmit the DL control channel (hereinafter referred to as the DL control region), and the last M symbols in a slot are used to transmit the UL control channel (hereinafter referred to as the UL control region). N and M are integers equal to or greater than 0. The resource region between the DL control region and the UL control region (hereinafter referred to as the data region) is used to transmit DL data or UL data. A time gap exists between the control region and the data region for DL-to-UL or UL-to-DL switching. The PDCCH is transmitted in the DL control region, and the PDSCH is transmitted in the DL data region. Some symbols at the time of switching from DL to UL within a slot are used as the time gap.

[0038] The base station is, for example, a gNodeB.

[0039] Uplink (UL) physical channels / signals

[0040] (1) PUSCH

[0041] The PUSCH carries uplink data (e.g., UL-SCH TB) and / or uplink control information (UCI) and is transmitted based on a cyclic prefix-orthogonal frequency division multiplexing (CP-OFDM) waveform or a discrete fourier transform-spread-orthogonal frequency division multiplexing (DFT-s-OFDM) waveform. When the PUSCH is transmitted based on a DFT-s-OFDM waveform, the terminal applies transform precoding to transmit the PUSCH. For example, when transform precoding is not possible (e.g., transform precoding is disabled), the terminal transmits the PUSCH based on the CP-OFDM waveform, and when transform precoding is possible (e.g., transform precoding is enabled), the terminal transmits the PUSCH based on the CP-OFDM waveform or the DFT-s-OFDM waveform. The PUSCH is dynamically scheduled by the PDCCH (dynamic scheduling) or semi-statically scheduled based on higher layer (e.g., RRC) signaling (and / or Layer 1 (L1) signaling (e.g., PDCCH)) (Configured Scheduling, CS). Therefore, in dynamic scheduling, PUSCH transmission is accompanied by the PDCCH, but in CS, PUSCH transmission is not accompanied by the PDCCH. CS includes Type-1 CG (Configured Grant) PUSCH transmission and Type-2 CG PUSCH transmission. In Type-1 CG, all parameters for PUSCH transmission are signaled by a higher layer. In Type-2 CG, some parameters for PUSCH transmission are signaled by a higher layer, and the rest are signaled by the PDCCH. Basically, in CS, PUSCH transmission is not accompanied by the PDCCH.

[0042] (2) PUCCH

[0043] The PUCCH carries Uplink Control Information (UCI), which includes:

[0044] - SR (Scheduling Request): Information used to request UL-SCH resources

[0045] - HARQ-ACK (Hybrid Automatic Repeat and reQuest Acknowledgement): A reception acknowledgement signal for DL ​​signals (e.g., PDSCH, SPS release PDCCH). HARQ-ACK responses include positive ACK (simply ACK), negative ACK (NACK), DTX (Discontinuous Transmission), or NACK / DTX. HARQ-ACK is also used interchangeably with A / N, ACK / NACK, HARQ-ACK / NACK, etc. HARQ-ACK is generated on a TB-by-TB / CBG-by-CBG basis.

[0046] CSI (Channel Status Information): Feedback information for the DL channel. CSI includes CQI (Channel Quality Information), RI (Rank Indicator), PMI (Precoding Matrix Indicator), PTI (Precoding Type Indicator), etc.

[0047] Downlink (DL) physical channels / signals

[0048] (1) PDSCH

[0049] The PDSCH carries downlink data (e.g., DL-shared channel transport block, DL-SCH TB). The TB is encoded into a codeword (CW) and then transmitted after undergoing scrambling and modulation processes. The CW includes one or more code blocks (CBs). One or more CBs are grouped into a CBG (CB group). Depending on the cell configuration, the PDSCH can carry up to two CWs. Scrambling and modulation are performed for each CW, and the modulation symbols generated from each CW are mapped to one or more layers. Each layer undergoes precoding, is mapped to resources along with DMRS, and transmitted from the corresponding antenna port. The PDSCH is dynamically scheduled by the PDCCH (configured scheduling) or semi-statically scheduled (configured scheduling, CS) based on higher layer (e.g., RRC) signaling (and / or Layer 1 (L1) signaling (e.g., PDCCH)). Therefore, in dynamic scheduling, PDSCH transmission is accompanied by a PDCCH, whereas in CS, PDSCH transmission is not accompanied by a PDCCH. CS includes SPS (semi-persistent scheduling).

[0050] (2) PDCCH

[0051] The PDCCH carries Downlink Control Information (DCI). For example, the PCCCH (i.e., DCI) carries the transmission format and resource allocation of the DL-SCH, frequency / time resource allocation information for the UL-SCH (shared channel), paging information for the PCH (paging channel), system information on the DL-SCH, frequency / time resource allocation information for higher layer control messages such as a voluntary access response (RAR) transmitted on the PDSCH, transmit power control commands, and information on activation / deactivation of SPS / CS (Configured Scheduling). Various DCI formats are provided depending on the information in the DCI.

[0052] 1.Priority and omission rules of multiple CSI report

[0053] The above content can be applied in combination with the method proposed in the present invention, which will be described later, or can be supplemented to clarify the technical features of the method proposed in the present invention.

[0054] In addition, the methods described below are equally applicable to the aforementioned NR system (licensed band) or shared spectrum, and can of course be modified or substituted according to the terms, expressions, structures, etc. defined in each system so that the technical ideas proposed in the present invention can be embodied in those systems as well.

[0055] Energy savings in base stations are an important consideration in wireless communication systems, including 3GPP, as they can contribute to building environmentally friendly networks by reducing carbon emissions and reducing operational expenditures (OPEX) for carriers. In particular, the introduction of 5G communications requires higher transmission rates, which necessitates base stations to be equipped with more antennas and provide services over wider bandwidths and frequency bands. As a result, a recent study estimated that base station energy costs have reached 20% of total OPEX. Due to this growing interest in base station energy savings, a new study item, "study on network energy savings," was approved in 3GPP NR release 18.

[0056] Specifically, in this item, enhancement techniques are considered for the following methods in order to improve the energy saving capability in terms of transmission and reception of a base station.

[0057] - How to achieve more efficient operation dynamically and / or semi-statically and finer granularity adaptation of transmissions and / or receptions in one or more of network energy saving techniques in time, frequency, spatial, and power domains, with potential support / feedback from the UE, and potential UE assistance information

[0058] When CSI information related to multiple AP numbers and / or multiple power offset values ​​for a CSI-RS resource is transmitted as one CSI report, the payload size may become large for the resources allocated to the CSI report. In this specification, rules regarding priority and omission are proposed to allow a terminal to omit some CSI information or divide it into other CSI reports for transmission in such cases.

[0059] In this specification, a base station instructs a terminal to calculate and report CSI information related to multiple antenna ports (APs) and / or multiple power offset values ​​for one or multiple CSI-RS resources, and adjusts the number of APs for a downlink signal / channel or adjusts the transmission power based on the received CSI report, thereby achieving network energy saving (NES) gain. For example, the base station configures a terminal to report, in a single CSI report, CSI information assuming multiple numbers of APs (e.g., 64 APs and 32 APs) and / or CSI information related to multiple CSI-RS-to-PDSCH power offset values ​​(e.g., -3 dB, 0 dB) for one CSI-RS resource or each of multiple CSI-RS resources in a CSI-RS resource set. Based on the information in the report, the base station can determine the optimal number of APs and PDSCH transmission power / MCS, thereby reducing the power consumption of the base station. In this case, if the amount of CSI information to be included in the CSI report is greater than the amount of resources allocated for the CSI report, a "priority and omission rule" is required to sequentially determine CSI information to be omitted based on priority or moved to another CSI report. Hereinafter, in the present invention, "power offset" may refer to powerControlOffset, which is an RRC parameter indicating a power offset value between PDSCH RE and NZP CSI-RS RE (specifically, the ratio between PDSCH EPRE and NZP CSI-RS EPRE assumed when the terminal calculates CSI feedback). Note that in the present invention, NAP is an abbreviation for "number of antenna port", and PCO is an abbreviation for "power control offset (i.e., powerControlOffset)".In this case, PCO may refer to powerControlOffset, an RRC parameter indicating a power offset value of PDSCH REs relative to NZP CSI-RS REs, or powerControlOffsetSS, an RRC parameter indicating the ratio between EPREs of NZP CSI-RSs relative to SS / PBCH blocks. In the former case, PDSCH power is adjusted based on CSI-RS power, and in the latter case, CSI-RS power is adjusted relative to SSB power.

[0060] In the present invention, a base station operating in an NES mode for ES may refer to, for example, the operation of the base station by presetting multiple OFF intervals (base station DTX intervals) in which the base station turns off transmission of a specific DL signal during a specific time interval and dynamically indicating one of the OFF intervals to indicate that the DL signal will not be transmitted during the predefined time interval, thereby reducing power consumption of the base station and the terminal. Furthermore, a base station operating in an NES mode for ES may also refer to an operation mode in which, not only in the time domain but also in the frequency domain, the base station does not perform transmission and / or reception via a specific receive antenna port of the base station when the specific receive antenna port of the base station is semi-statically or dynamically turned off, thereby reducing power consumption of the base station and the terminal. Furthermore, a base station operating in an NES mode for ES may also refer to an operation mode in which, in the spatial domain, the base station does not perform transmission and / or reception via a specific receive antenna port of the base station when the specific receive antenna port of the base station is semi-statically or dynamically turned off, thereby reducing power consumption of the base station and the terminal.

[0061] Table 4 is an excerpt from 3GPP TS 38.331, and Table 5 is an excerpt from 3GPP TS 38.214, illustrating RRC parameters for configuring NZP CSI-RS resources in a conventional NR system. In particular, Tables 4 and 5 show that the powerControlOffset parameter indicates the power offset between PDSCH REs and NZP CSI-RS REs.

[0062] [Table 4]

[0063] [Table 5]

[0064] The UE can determine the SSB transmission power of the serving base station through the RRC parameter ss-PBCH-BlockPower. The UE can also determine the CSI-RS transmission power (per CSI-RS resource) of the serving base station through the RRC parameter powerControlOffsetSS. The base station can adjust the PDSCH transmission power or MCS based on the CQI in the UE's CSI report. When receiving CSI-RS transmitted from the base station, the UE can calculate and report the CQI assuming that the PDSCH is power boosted or power reduced based on the powerControlOffset in the CSI-RS resource configuration. Therefore, the UE calculates and reports the CSI assuming that there is a power fluctuation of the offset value relative to the power of the actually received CSI-RS. The base station can appropriately adjust the PDSCH power and MCS based on the reported information, or can schedule the PDSCH using the conventional settings without adjusting them (up to gNB implementation). If CSI information corresponding to multiple power offset values ​​and / or multiple numbers of APs can be configured and / or instructed to be transmitted via a single CSI report, the base station does not need to perform RRC reconfiguration, which involves a relatively long delay, or receive multiple CSI reports for multiple power offset values ​​and / or multiple APs to change the power offset value and / or the number of APs in a CSI-RS resource or CSI-RS resource set. The base station can save energy by receiving CSI reports for multiple power offset values ​​and / or multiple numbers of APs at once and quickly utilizing them for downlink power adjustment and / or AP number adjustment.

[0065] In an NR system, a physical uplink control channel (PUCCH) can be defined for transmitting uplink control indicators (UCIs) including HARQ-ACKs, channel state information (CSIs), scheduling requests (SRs), and / or beam-related information. A relatively short PUCCH (referred to as an sPUCCH for convenience) consisting of one or two symbols can be transmitted within one slot consisting of 14 symbols. A relatively long PUCCH (referred to as a long PUCCH for convenience) consisting of four or more symbols can also be transmitted within one slot consisting of 14 symbols. Furthermore, UCI can also be transmitted via a physical uplink shared channel (PUSCH) for transmitting UL data. A PUSCH including only UCI, without including an uplink-shared channel (UL-SCH), can also be transmitted.

[0066] In an NR system, CSI is broadly divided into two types, referred to as Type-1 CSI and Type-2 CSI. Both Type-1 CSI and Type-2 CSI are types that report CSI based on a codebook. Type-1 CSI is a precoding matrix indicator (PMI) feedback method with normal spatial resolution and requires a relatively small payload size. On the other hand, Type-2 CSI is a feedback method with higher spatial resolution and requires a relatively large payload size. Each type of CSI has three reporting methods, broadly speaking: wideband (WB), partial band (PB), and subband (SB), depending on the bandwidth at which measurements are performed. The bandwidths are WB, PB, and SB, in that order. PB may refer to an active BWP. WB indicates a bandwidth (BW) larger than PB, and SB indicates a bandwidth smaller than PB. Each type of CSI is broadly composed of two parts. Part 1 CSI includes rank information and the like, and its payload size is not variable. Part 2 CSI may have a variable payload size depending on Part 1 CSI (i.e., rank value). Also, depending on the periodicity of CSI reporting, periodic / semi-persistent / aperiodic CSI reporting schemes may exist.

[0067] In the case of UCI information with a very large payload size, such as part 2 CSI, depending on the size of the resource region of the transmitted PUCCH and / or PUSCH, not all information may be included in a single transmission, and some information may be omitted. Priority may be set according to the type of included information. For example, as shown in FIG. 4, when the number of types of CSI reported in one slot is N (which may be linked with, for example, a CSI process index or a CC index), the priority of the entire part 2 CSI is determined according to a priority determined taking into account whether the type of CSI is WB CSI or SB CSI, and the CSI may be omitted in order from the lowest priority block.

[0068] Furthermore, when UCI is piggybacked on a PUSCH in an NR system, a beta offset (beta_offset) value can be configured by semi-static configuration via RRC signaling and / or dynamic instruction via a UL grant according to the type of UCI and its payload size. This beta offset can be defined as a parameter for adjusting the coding rate for UCI piggybacking. Specifically, the beta offset can be configured separately for HARQ-ACK, CSI Part 1, and CSI Part 2. For HARQ-ACK, different beta offset values ​​can be configured for a payload size of less than 3 bits, between 3 and 11 bits, and more than 11 bits. Also, different values ​​can be configured for CSI Part 1 and CSI Part 2 for a payload size of 11 bits or less and more than 11 bits. As an example, the number of coded symbols (Q') including a specific UCI (e.g., HARQ-ACK, CSI, etc.) is configured as shown in Equation 1. where O represents the payload size of the UCI, M_sc^PUSCH represents the size of the resource region on the frequency axis allocated to the PUSCH, N_symb^PUSCH represents the size of the resource region on the time axis allocated to the PUSCH, and K_r represents the information bit size of the code block r. According to Equation 1, the UCI can be transmitted for a maximum of four symbols within the allocated PUSCH region. The larger the beta offset value, the more coded symbols are transmitted for the UCI, resulting in a lower coding rate.

[0069]

number

[0070] According to Section 5.2.3 of 3GPP TS 38.214, when the CSI reported over the PUSCH consists of two parts (i.e., Part 1 and Part 2), the UE can omission Part 2 CSI according to the priority order of Figure 5. N_Rep is the number of CSI reports configured to be included in and transmitted on the PUSCH, where Priority 0 is the highest priority and Priority 2N_Rep is the lowest priority. CSI report #n corresponds to the CSI report having the nth smallest Pri_iCSI(y, k, c, s) value among the CSI reports defined in Section 5.2.5 of 3GPP TS 38.214 (see Table 6).

[0071] [Table 6]

[0072] Meanwhile, for the purpose of NES, the base station may turn on or off certain spatial elements or adjust the power value for a downlink signal / channel. In this specification, a spatial element may refer to an antenna port, active transceiver chains, a panel, or transmission and reception points (TRPs). To dynamically apply various NES techniques in the spatial and power domains, the base station may associate CSI-RS resource sets having different antenna ports for one CSI reporting configuration (e.g., CSI-ReportConfig) or associate multiple power offsets (e.g., a powerControlOffset parameter that is a power offset value between PDSCH and CSI-RS, a powerControlOffsetSS parameter that is a power offset value between SSS and CSI-RS, etc.).

[0073] Meanwhile, at least one CSI framework can be introduced using the following methods:

[0074] - Method #1: Within the CSI-ReportConfig configuration, multiple CSI-RS resource sets are linked for one CMR (channel measurement resource, configurable via the resourcesForChannelMeasurement parameter) or one IMR (interference measurement resource, configurable via the csi-IM-ResourcesForInterference or nzp-CSI-RS-ResourcesForInterference parameter). For example, if CSI-RS resource set #1 and CSI-RS resource set #2 are linked for a CMR, the CSI-RS resources belonging to CSI-RS resource set #1 are configured with 16 APs, and the CSI-RS resources belonging to CSI-RS resource set #2 are configured with 8 APs.

[0075] - Method #2: In a CSI-ReportConfig configuration, if there is one CSI-RS resource set associated with one CMR or one IMR, the set is composed of one or more CSI-RS resources with different attributes such as the number of APs and / or power offset. For example, for CSI-RS resource set #1 configured as a CMR, CSI-RS resource #1 belonging to CSI-RS resource set #1 is configured with 16 APs (or the value of power offset #1 is set), and CSI-RS resource #2 belonging to the same set is configured with 8 APs (or the value of power offset #2 is set).

[0076] - Method #3: When a CSI-ReportConfig configuration includes one CSI-RS resource set associated with one CMR or one IMR, some or all of the CSI-RS resources in the set can be configured with multiple AP counts and / or power offsets. For example, in CSI-RS resource set #1 configured as a CMR, if CSI-RS resource #1 belonging to CSI-RS resource set #1 is configured with a maximum of 16 APs, CSI reporting using some of the APs is configured. Alternatively, multiple power offset values ​​are configured for CSI-RS resource #2 belonging to the same set, and CSI reporting using all or some of the power offsets is configured.

[0077] Under the above CSI framework, the CSI reporting method can be defined by at least one of the following options:

[0078] Option #1: CSI taking into account multiple numbers of APs and / or multiple power offset values ​​configured in one CSI report can all be included in one CSI report. Alternatively, CSI taking into account multiple numbers of APs and / or multiple power offsets as configured / instructed by the base station (in this case, the number of APs and / or power offset configured / instructed by the base station may be part of the number of APs and / or power offset value configured in the CSI report) can be included in one CSI report.

[0079] - Option #2: Even if multiple AP numbers and / or multiple power offset values ​​are configured in one CSI report, CSI that takes into account only a single AP number and / or a single power offset can be included in one CSI report, depending on the configuration / instruction of the base station.

[0080] - Option #3: Even if multiple AP numbers and / or multiple power offset values ​​are configured in one CSI report (pre-configured by the base station or using pre-defined criteria), CSI taking into account some AP numbers and / or some power offsets can be included in one CSI report based on the terminal's judgment / decision.

[0081] Within the CSI-ReportConfig, L (>1) sub-configurations can be configured, where each sub-configuration can correspond to one spatial domain adaptation pattern or one power domain adaptation pattern.

[0082] Here, the spatial domain adaptation pattern may correspond to a specific number of antenna ports (or antenna port on / off pattern) or a specific CSI-RS power value (e.g., the CSI-RS power value determined by the powerControlOffsetSS parameter, which is a power offset value between SSS and CSI-RS; if some antenna elements corresponding to one antenna port are turned off, this may affect the CSI-RS power value). When Method #2 is applied, if A1 APs (or power value P1) are configured for CSI-RS index #n1 belonging to a resource set and A2 APs (or power value P2) are configured for CSI-RS index #n2 belonging to the same set, sub-configuration index #s1 is linked to CSI-RS #n1, sub-configuration index #s2 is linked to CSI-RS index #n2, and a different spatial domain adaptation pattern may be configured for each sub-configuration. When Method #3 is applied, when A1 APs (or power values ​​P1 / P2) are configured for CSI-RS index #n1 belonging to a resource set, the number of APs A1 (or power value P1) is linked to sub-configuration index #s1, and the number of APs A2 (or power value P2) constituting CSI-RS index #n1 is linked to sub-configuration index #s2 (A1 > A2), and a different spatial domain adaptation pattern can be configured for each sub-configuration.

[0083] Furthermore, the power domain adaptation pattern may mean that a power offset value (e.g., a power offset value determined by a powerControlOffset parameter that is a power offset value between PDSCH and CSI-RS, a powerControlOffsetSS parameter that is a power offset value between SSS and CSI-RS, etc.) varies. When Method #2 is applied, when a power value P1 is configured for CSI-RS index #n1 belonging to a resource set and a power value P2 is configured for CSI-RS index #n2 belonging to the same set, the sub-configuration index #s1 is linked to the CSI-RS index #n1 and the sub-configuration index #s2 is linked to the CSI-RS index #n2, so that a different power domain adaptation pattern can be configured for each sub-configuration. When Method #3 is applied, when a power value P1 (or power value P2) is configured for CSI-RS index #n1 belonging to a resource set, the sub-configuration index #s1 is linked to the power value P1 and the sub-configuration index #s2 is linked to the power value P2, so that a different power domain adaptation pattern can be configured for each sub-configuration. The terminal can feed back to the base station a CSI report consisting of CSI corresponding to N (N is a value between 1 and L) sub-configurations among the L sub-configurations (using one of the above-mentioned Option #1 / 2 / 3).

[0084] [Method #1] Priority, Omission Rules, and CSI Report Configuration Method When CSI Feedback for Multiple AP Numbers and / or Power Offset Values ​​is Triggered for CSI Reports with Priority 0

[0085] Conventionally, only one power offset value was set per CSI-RS resource. Because the number of ports of all CSI-RS resources included in a CSI-RS resource set must be the same, the CSI (CQI and PMI) included in a CSI report was calculated assuming a single power offset and a single number of APs. However, for the purpose of energy conservation, a base station can instruct a terminal to transmit CSI assuming multiple numbers of APs and / or CSI assuming multiple power offset values ​​through a single CSI report. The terminal is instructed to transmit PMI values ​​assuming multiple numbers of APs (e.g., PMI assuming 32 APs and PMI assuming 64 APs) and CQI values ​​assuming multiple power offset values ​​(e.g., CQI value for 0 dB and CQI value for 3 dB) through a single CSI report. In this case, the amount of resources allocated for the CSI report may be insufficient to include all of the CSI assuming the multiple numbers of APs and multiple power offset values.

[0086] In preparation for such a case, the base station may pre-configure / instruct a priority and omission rule, and the terminal may omit lower-priority CSI or shift to another CSI report and transmit a higher-priority CSI report to fit the allocated CSI reporting resources. For example, referring to FIG. 5, Part 2 WB CSI and Group 0 CSI of e Type II (enhanced Type II CSI) from CSI report 1 to CSI report N_Rep are configured as one block, and the CSI within one configured block has the same priority (Priority 0). Therefore, if the resources allocated for CSI reporting are insufficient to carry all information corresponding to Priority 0, the entire block corresponding to Priority 0 is dropped. Therefore, in preparation for a case in which the amount of Priority 0 CSI reporting resources is insufficient to carry all CSI calculated assuming multiple AP numbers and / or multiple power offset values, a separate priority rule (N additional sub-priorities within Priority 0) may be configured / instructed or pre-defined by the base station.

[0087] As a method for setting a priority rule among CSI information, individual priorities can be set for each number of APs, each power offset value, or a combination of both. For example, when there is CSI assuming multiple numbers of APs, only CSI calculated assuming 64 APs or CSI calculated assuming a 3 dB power offset can be set to a high priority, so that the information can be included in the CSI report with the highest priority even when CSI reporting resources are insufficient. If the CSI-RS resource (set) index differs for each number of APs and power offset value, the priorities can be set in ascending or descending order of the (set) index. As another example, as a method for giving priority to CSI with higher accuracy, a higher priority can be set for the number of APs / power offset value corresponding to CSI with a higher CQI (or a larger number of layers or a larger RI value). For example, if 64 ports (or a power offset value of 0 dB) are configured in CSI-RS resource set #1 and 32 ports (or a power offset value of 3 dB) are configured in CSI-RS resource set #2, and the priorities are configured in ascending order of CSI-RS resource set index, CSI calculated assuming 64 ports (or a power offset value of 0 dB) may be included in the CSI report with a higher priority than CSI calculated assuming 32 ports (or a power offset value of 3 dB). Here, information regarding the ordering of CSI information may also be transmitted (e.g., included in the CSI information of Part 1) to inform the base station which AP number or power offset value each of the multiple CSIs in the CSI report configured by the terminal is related to. Unless otherwise configured / instructed, the conventional reporting method may be extended and applied as is. When multiple CRIs are reported (when multiple CSI-RS resources are configured), the CSI information corresponding to the first CRI may be considered to have the highest priority, and the CSI report may be configured accordingly.

[0088] As a specific example of dividing sub-priorities within Priority 0, it is assumed that CSI related to a maximum of two AP numbers and two power offset values ​​is triggered as one CSI report. Sub-priorities 0 / 1 / 2 / 3 exist within Priority 0, and the priority among CSIs of Priority 0 can be set / indicated / defined as follows: (CSI information A - CSI information calculated assuming a smaller number of APs than CSI information A among CSI information calculated assuming a plurality of AP numbers > (CSI information B - CSI information calculated assuming a smaller number of APs than CSI information A among CSI information calculated assuming a plurality of AP numbers) > (CSI information C - CSI information calculated assuming the largest power offset value among CSI information calculated assuming a plurality of power offset values) > (CSI information D - CSI information calculated assuming a smaller power offset value than CSI information C among CSI information calculated assuming a plurality of power offset values). Suppose a UE has a 64-port WB PMI, a 32-port WB PMI, and a 64-port WB PMI. When the feedback of PMI, CQI assuming a 3 dB power offset, and CQI assuming a 0 dB power offset is instructed, but the amount of resources allocated to one CSI report is insufficient to accommodate all the CSI information, the CSI with the lowest priority is omitted or offloaded to the next CSI report according to the priority and omission rules in the above example. If the 64-port WB PMI is considered to have the highest priority and the priority levels are divided into the 32-port WB PMI, CQI assuming a 3 dB power offset, and CQI assuming a 0 dB power offset, the CQI with the lowest priority, assuming a 0 dB power offset, is omitted or offloaded to the next CSI report. For example, if the amount of resources allocated to a CSI report can accommodate only 64 / 32-port WB PMI, one CSI report can contain the 64 / 32-port WB PMI, which corresponds to lower priority 0 / 1. Only PMI information is included and CQI information assuming a 3 dB / 0 dB power offset corresponding to lower-priority 2 / 3 is dropped.

[0089] When the base station operates in normal mode (i.e., non-NES mode), the terminal reports CSI using the conventional CSI reporting configuration method with priority 0. However, when there is an explicit (group common DCI / MAC-CE) or implicit (NES state / mode=ON) instruction from the base station, the terminal can configure the CSI in the CSI report by dividing lower priorities within priority 0 as described above. Alternatively, the priority may differ between a large number of APs and a small number of APs (or a large power offset and a small power offset) depending on the NES / non-NES mode of the base station. For example, in NES mode, a higher priority is given to CSI information assuming a large number of APs (or a large power offset), and in non-NES mode, a higher priority is given to a small number of APs (or a small power offset).

[0090] [Method #2] Priority, Omission Rules, and CSI Report Configuration Method When CSI Feedback Regarding Multiple AP Numbers and / or Power Offset Values ​​is Triggered for CSI Reports Other Than Priority 0 (i.e., CSIs Corresponding to Priority 1 to Priority 2N_Rep)

[0091] In Figure 5, for priority levels 1 to 2N_Rep, excluding priority level 0, sub-band CSI is divided into even sub-bands and odd sub-bands. If the amount of CSI reporting resources is insufficient, CSI reports with larger CSI report numbers are omitted, and even sub-bands within the same CSI report number are omitted, and the amount of CSI information is adjusted according to the amount of resources.

[0092] Just as the number of priorities is subdivided into 2N_Rep by dividing sub-band CSI information into even / odd numbers, as in [Method #1], the priorities can be further subdivided according to the type of CSI. The subdivided priorities can be set / instructed by the base station or predefined in the terminal. For example, in addition to even / odd sub-band CSI, the priority levels between CSI calculated assuming a specific number of APs can be subdivided. If CSI assuming up to two AP numbers is triggered by one CSI report, the total number of priorities can be subdivided into 4N_Rep. Furthermore, if priorities are pre-set between CSI calculated assuming up to two power offset values, the number of priorities can be subdivided into up to 16N_Rep.

[0093] As another method for prioritizing CSIs, priorities can be set individually for each number of APs, each power offset value, or a combination of both. For example, when there are CSIs assuming multiple numbers of APs, if only CSIs calculated assuming 64 APs or a 3 dB power offset are set as high priority, the information can be included in the CSI report with the highest priority even when CSI reporting resources are insufficient. If CSI-RS resource (set) indices differ for each number of APs and power offset value, the priorities can be set in ascending or descending order of the (set) indices. For example, if 64 ports (or a 0 dB power offset value) are configured for CSI-RS resource set #1 and 32 ports (or a 3 dB power offset value) are configured for CSI-RS resource set #2, and the priorities are set in ascending order of CSI-RS resource set index, the CSI calculated assuming 64 ports (or a 0 dB power offset value) can be included in the CSI report with a higher priority than the CSI calculated assuming 32 ports (or a 3 dB power offset value).

[0094] As another example, as a more accurate means of prioritizing CSI, a higher priority may be assigned to the number of APs / power offset value corresponding to CSI with a higher CQI (or with more layers or a larger RI value). Here, in order to inform the base station of which AP number or power offset value multiple CSIs in a CSI report configured by the terminal are related to, information on the ordering of CSIs may also be included in the CSI report (e.g., included in Part 1 CSI) and transmitted. Alternatively, unless otherwise configured / instructed, the conventional reporting method may be extended and applied as is. When multiple CRIs are reported (when multiple CSI-RS resources are configured), the CSI corresponding to the first CRI may be considered to have the highest priority, and the CSI report may be configured.

[0095] As an example of a method of subdividing the priority between even / odd sub-band CSI and CSI assuming up to two AP numbers, if there is CSI assuming 64 APs and CSI assuming 32 APs, the priority levels can be subdivided as follows: Priority 1: CSI corresponding to even sub-bands among CSI assuming 64 APs; Priority 2: CSI information corresponding to even sub-bands among CSI assuming 32 APs; Priority 3: CSI corresponding to odd sub-bands among CSI assuming 64 APs; and Priority 4: CSI corresponding to odd sub-bands among CSI assuming 32 APs.

[0096] Alternatively, the total number of priorities may be maintained at 2N_Rep, and prioritized CSI reports may be configured by prioritizing the number of APs and power offset values ​​rather than distinguishing between even and odd subbands for each CSI report #n. For example, priority levels may be set such that Priority 1 is CSI corresponding to even and odd subbands among CSI information assuming the number of APs is 64, and Priority 2 is CSI corresponding to even and odd subbands among CSI information assuming the number of APs is 32. Alternatively, the priorities may be divided in the following order: Priority 1 is CSI corresponding to even or odd subbands among CSI information assuming the number of APs is 64, and Priority 2 is CSI corresponding to even or odd subbands among CSI information assuming the number of APs is 32. Alternatively, a method of reducing the number of subbands by increasing the size of the frequency domain corresponding to each subband may be used. As another alternative, the priority levels may be set in the following order: priority 1 is set to CSI corresponding to even sub-bands among CSI assuming 64 APs and CSI corresponding to even sub-bands among CSI assuming 32 APs, and priority 2 is set to CSI corresponding to odd sub-bands among CSI assuming 64 APs and CSI corresponding to odd sub-bands among CSI assuming 32 APs.

[0097] On the other hand, each CSI report #n may include only sub-band CSI for a specific number of APs and / or a specific power offset value that are set to high priority, and may include only WB CSI without sub-band CSI for other numbers of APs and / or power offset values. That is, sub-band CSI for CSI calculated assuming a number of APs and / or a power offset value that are not set to high priority may be omitted.

[0098] [Method #3] When e-Type II CSI feedback corresponding to multiple APs is triggered as one CSI report, a method for configuring CSI reports by applying specific priority and omission rules according to the number of APs even among e-Type II CSIs

[0099] The "Enhanced Type II CSI codebook" is an efficient feedback scheme based on space-frequency domain compression that reduces the CSI feedback overhead of conventional Type II CSI codebooks while maintaining some of the performance gain of MU-MIMO. For eType II CSI (Enhanced Type II CSI), UCI Part 2 is divided into three groups, and the CSI information included in each group is shown in Table 7. The priority of each group is G0 > G1 > G2. The priority levels of the UCI information included in G1 and G2 are as follows: The values ​​calculated by Pri(l,i,f) = 2·L·υ·π(f) + υ·i+l as described in 3GPP TS 38.214 are sorted in ascending order. The UCIs corresponding to the upper half of the indices are assigned to G1, and the UCIs corresponding to the lower half of the indices are assigned to G2.

[0100] [Table 7]

[0101] As can be seen from Figure 5, in eType II CSI Part 2, CSI omission is performed first in ascending order of CSI reporting number because it has the lowest priority, and within the same CSI reporting number, G2 is omitted first because it has the lowest priority. Depending on the amount of resources allocated to CSI reporting, G2 and G1 are omitted alternately, starting with the UCI with the lowest priority, located at the bottom of Figure 5. If there is still insufficient space for CSI reporting, UCIs included in G0 are also omitted.

[0102] The e type II CSI information belonging to each G0 / G1 / G2 is calculated assuming a specific number of APs. For multiple AP numbers, e type II CSI corresponding to each AP number can be calculated. In this case, the base station can trigger e type II CSI feedback corresponding to multiple AP numbers as a single CSI report, and the priority and omission rules for each AP number can be set / instructed / defined in advance. For example, the base station can set / instruct (or predefine in the terminal) a higher priority for CSI calculated assuming a larger number of APs, and instruct that UCI belonging to G0 among e type II CSI calculated assuming 64 APs and UCI belonging to G0 among e type II CSI calculated assuming 32 APs be simultaneously transmitted in a single CSI report. If the amount of resources allocated to the CSI report is insufficient to include all CSI, G0 CSI calculated assuming 64 APs can be preferentially included in the CSI report, and G0 CSI calculated assuming 32 APs can be omitted or included in the CSI report with the next highest priority.

[0103] Another method for prioritizing CSIs is to set priorities for each number of APs. For example, if there are CSIs assuming multiple APs, a high priority can be set for only G0 / G1 / G2 CSIs calculated assuming 64 APs. This allows the corresponding information to be included in the CSI report with the highest priority even when CSI reporting resources are insufficient. If the CSI-RS resource (set) index differs for each number of APs, the priorities can be set in ascending or descending order of the (set) index. For example, if 64 ports are configured in CSI-RS resource set #1 and 32 ports are configured in CSI-RS resource set #2, and the priorities are set in ascending order, G0 / G1 / G2 CSIs calculated assuming 64 ports can be configured in the CSI report with a higher priority than G0 / G1 / G2 CSIs calculated assuming 32 ports.

[0104] Similarly, for eType II CSI belonging to G1 and G2, the priority and omission rules may be set / indicated / defined in advance for each CSI information calculated assuming a specific number of APs. Alternatively, the amount of CSI can be adjusted by adjusting the granularity in the spatial domain. For example, the total number of priorities may be maintained at 2N_Rep, and the CSI report may be configured for each CSI report #n by prioritizing the priority among the number of APs over the priority by group (such as G1 or G2). For example, priority levels may be set such that Priority 1 is the CSI corresponding to G1 and G2 among the CSI assuming the number of 64 APs, and Priority 2 is the CSI corresponding to G1 and G2 among the CSI assuming the number of 32 APs. Alternatively, the priority may be set in the order of Priority 1 being the CSI corresponding to G1 or G2 among the CSI assuming the number of 64 APs, and Priority 2 being the CSI corresponding to G1 or G2 among the CSI assuming the number of 32 APs. As another method, the priority levels may be set in the order of CSI corresponding to G1 among CSI assuming the number of 64 APs and CSI corresponding to G1 among CSI assuming the number of 32 APs for Priority 1, and CSI corresponding to G2 among CSI assuming the number of 64 APs and CSI corresponding to G2 among CSI assuming the number of 32 APs for Priority 2. Characteristically, in CSI reporting assuming a plurality of numbers of APs, Type II CSI feedback may not be used, and only Type I and Type II CSI feedback may be used, taking into account the processing timeline.

[0105] In the present invention, a specific number of APs or a specific power offset value may correspond to a specific sub-configuration index among multiple CSI reporting sub-configurations included in the CSI reporting configuration. For example, a spatial domain adaptive pattern having 64 APs and a spatial domain adaptive pattern having 32 APs correspond to sub-configuration index #0 and sub-configuration index #1, respectively. Furthermore, the base station may configure / instruct a single CSI report to report multiple CSIs corresponding to N sub-configurations among L sub-configurations configured in the CSI reporting configuration. Thus, the number of CSIs corresponding to sub-configuration indexes included in each CSI report or the CSI information corresponding to each sub-configuration index may vary. Therefore, when calculating the priority of each CSI report using the formula in Table 6, both the sub-configuration index and the number of sub-configuration indexes included in the CSI report may be taken into consideration.

[0106] For example, Pri iCSI (y,k,c,s,p,q)=2N cells· M s· y+N cells· M s· k+M s· As shown in c+s+(Lp)+q, a sub-configuration index p and the number q of sub-configurations included in the CSI report among the total L sub-configuration indexes are added as parameters to the formula, and the higher the sub-configuration index included in the CSI report and the more sub-configurations included in the CSI report, the higher the priority of the CSI report.In the case of conventional CSI reporting, since there is no sub-configuration index, the priority is always calculated with p=L and q=0.

[0107] Other examples include Pr iiCSI (y,k,c,s,q)=2 · q max· N cells· M s· y+q max· N cells· M s· k+q max· M s· c+qmax· As shown in s+q, the sub-configuration index q and the maximum number of sub-configuration indexes q_max can be added as parameters to the formula. The lower the sub-configuration index included in the CSI report, the higher the priority of the CSI report. Here, in the case of conventional CSI reporting, since there is no sub-configuration index, the priority is always calculated with q=0.

[0108] On the other hand, if the above formula considers the number or index of sub-configurations to determine the priority of CSI reports including specific CSI, as in the proposed method, if the resources allocated to CSI reporting are insufficient to carry all CSI information, the sub-configuration index and / or its number can also be considered in the omission rules for CSI Part 2.

[0109] When CSI Part 2 is omitted according to the priority order shown in FIG. 5, additional priority levels can be defined taking into account the sub-configuration indexes and / or the number N of sub-configuration indexes instructed to be included in the CSI report. For example, when each priority level of CSI Part 2 is defined, in addition to the number N_Rep of CSI reports, more granular priority levels can be defined that reflect the number N (and / or up to the index) of sub-configuration indexes instructed / configured to be included in the CSI report. For example, if the value of N_Rep is 2, the first CSI report is a conventional CSI report including a single CSI without a sub-configuration index, and the second CSI report is a CSI report with N=4 including four sub-configuration indexes, a priority level defined as N_Rep=5 is set, and the Part 2 CSI with the lowest priority is omitted. Depending on the number N of sub-configuration indexes instructed / configured to be included in the CSI report, the priority level can be set so that the larger N is, the higher the priority, or the higher (or lower) the sub-configuration indexes in the CSI report are, the higher the priority.

[0110] [Method #4] According to the priority set for each sub-configuration, WB CSI corresponding to a sub-configuration with a lower priority is always omitted in the CSI report with priority 0.

[0111] Meanwhile, in the present invention, a specific number of APs or a specific power offset value may be configured to correspond to a sub-configuration having a specific index in the CSI reporting configuration. The base station may configure a total of L sub-configurations in a terminal and trigger / activate a terminal to transmit multiple CSI corresponding to N (N>1) sub-configurations as one CSI report. In this case, as described above, a priority may be configured for each sub-configuration corresponding to a specific number of APs or a specific power offset value. For each of the N sub-configuration indexes triggered / activated to be included in a CSI report (especially within priority 0), the CSI may be configured to differ according to the priority (e.g., specific CSI information may always be omitted). Specifically, among multiple sub-configuration indexes triggered / activated to be included in a CSI report (priority 0), CSI information corresponding to a sub-configuration configured with a relatively high priority may be configured / instructed to always include WB CSI, and WB CSI corresponding to other sub-configurations with lower priority may always be omitted. That is, a priority is pre-set for each sub-configuration index, and when one (priority 0) CSI report is constructed with CSI corresponding to multiple sub-configurations, WB CSI for a lower priority sub-configuration can always be omitted, taking into account the resources allocated to the CSI report.

[0112] For example, in the CSI reporting configuration, sub-configuration index #1 corresponding to the number of 64 APs, sub-configuration index #2 corresponding to the number of 32 APs, sub-configuration index #3 corresponding to a -3 dB power offset, and sub-configuration index #4 corresponding to a 0 dB power offset are configured, and sub-configuration indexes #1 and #3 are configured to have high priority, and sub-configuration indexes #2 and #4 are configured to have low priority. In this case, when CSI reporting is triggered / activated so that CSI corresponding to all sub-configurations is included in one CSI report, WB CSI is included in the CSI report for sub-configuration indexes #1 and #3 corresponding to high priority, and WB CSI information is omitted and not included in the CSI report for sub-configuration indexes #2 and #4 corresponding to low priority.

[0113] Alternatively, the priority may be considered to be automatically set based on the sub-configuration indexes set in the CSI-ReportConfig. Based on a predetermined rule (such as in a standard document) or a base station configuration / instruction, a rule may be predefined such that high priority is assigned only to the lowest or highest index (among the triggered / activated sub-configuration indexes) (or high priority is assigned only to Y indexes including the lowest index), and low priority is assigned to the other indexes. In such a case, if sub-configuration index #1 corresponding to 64 APs, sub-configuration index #2 corresponding to 32 APs, sub-configuration index #3 corresponding to a -3 dB power offset, and sub-configuration index #4 corresponding to a 0 dB power offset are set in the CSI reporting configuration, sub-configuration index #1 is considered to have the highest priority, and the WB CSI information corresponding to 64 APs is included in the CSI report, while the WB CSI information corresponding to the other sub-configuration indexes is omitted and not included in the CSI report.

[0114] [Method #5] When CSI corresponding to multiple sub-configuration indexes is included in one CSI report and the rules of priority and omission are applied to the CSI report unit, a method for omitting only CSI information corresponding to some sub-configurations

[0115] When CSI corresponding to N (>1) sub-configurations is configured in one CSI report based on the CSI reporting configuration, the CSI Part 1 and Part 2, and the CSI priority and omission rules when a legacy CSI report with N=1 is configured (legacy CSI report) need to be enhanced or modified. Table 8 shows the approach for CSI mapping, priority, and omission rules for CSI with multiple sub-configurations discussed at the RAN1#113 meeting.

[0116] [Table 8]

[0117] Approach 1 is a method of applying the CSI mapping order of CSI Part 1 and Part 2, as well as the CSI priority and omission rules, per CSI report, similar to conventional CSI reporting. When CSI corresponding to N sub-configurations is configured within a CSI report, CSI quantities (e.g., CRI, RI, CQI, etc.) corresponding to all N sub-configurations are multiplexed into one CSI Part 1 to form CSI report #n. Similarly to conventional CSI reporting, CSI Part 2 is configured according to the priority level, with even-numbered sub-band CSI corresponding to all N sub-configurations within the same CSI report #n having first priority and odd-numbered sub-band CSI having second priority. If the amount of resources allocated to the CSI report is insufficient to include all CSI, the lower-priority block, i.e., odd-numbered sub-band CSI, is omitted first.

[0118] For example, if four sub-configurations (indexes #1, #2, #3, and #4) are included in CSI report #1 and are triggered / activated to be reported on the PUSCH or PUCCH, CSI part 2 may consist of block #1, which is CSI corresponding to the even sub-bands of all sub-configurations #1, #2, #3, and #4, and block #2, which is CSI corresponding to the odd sub-bands. If the resources allocated to the CSI report are insufficient to carry both block #1 and block #2, the UE may omit block #2 according to the priority level. In such a block-by-block omission, even if the amount of resources allocated to the CSI report is insufficient to carry the entire block #2, odd sub-band CSI for some indexes of the sub-configurations included in block #2 can be included, it is necessary to omit all odd sub-band CSI of all sub-configurations at once, which is inefficient in terms of CSI feedback accuracy and resource utilization. Therefore, even when CSI priority and omission rules are applied at the CSI reporting unit as in Approach 1, a method can be considered in which omission is performed at a sub-setting unit rather than at a block unit.

[0119] In this way, when a method can be applied in which only some of the lower-configurations are omitted rather than the entire block, in the above example, if there are insufficient CSI reporting resources to include the entire block #2 in the CSI report, but odd sub-band CSI corresponding to two lower-configurations can be included in the CSI report, odd sub-band CSI corresponding to specific two lower-configuration indexes will be included in the CSI report, and only some of the odd sub-band CSI corresponding to the other two lower-configuration indexes can be omitted.

[0120] By applying this principle, if the amount of resources is insufficient for the CSI report to include all of block #1 and block #2, block #2 is dropped first, and then only the even sub-band CSI corresponding to some of the lower-level settings in block #1 is included in the CSI report, and only the even sub-band CSI corresponding to some of the other lower-level settings can be omitted.

[0121] Even if both Block #1 and Block #2 are dropped, if all CSI Part 1 corresponding to the triggered / activated N (>1) sub-configurations are not included in the CSI report, the same principle as CSI Part 2 can be applied to CSI Part 1. That is, instead of the entire CSI Part 1, only CSI corresponding to some sub-configurations is omitted, preventing the entire CSI Part 1 from being omitted.

[0122] On the other hand, not only 3GPP TS 38.214 but also 3GPP TS 38.213 Section 9.2.5.2 state that if the CSI resources are insufficient to include all CSI, the terminal omits (drops) CSI reports. Tables 9 and 10 are excerpts from 3GPP TS 38.213 Section 9.2.5.2.

[0123] [Table 9]

[0124] [Table 10] JPEG2026506096000013.jpg49161

[0125] In Tables 9 and 10, even for portions that indicate omission (dropping) on ​​a CSI reporting basis (portions marked "the UE selects..." or "the UE drops..."), it may be more efficient to omit (drop) on a sub-configuration basis to prevent unnecessary dropping of CSI information. For example, when the number of sub-configurations triggered / activated to be included in a CSI report is N=3 (sub-configuration indexes #1, #2, #3), if the resources allocated to the CSI report are insufficient to include Part 2 CSI for all sub-configuration indexes but Part 2 CSI for sub-configuration index #1 can be included, only Part 2 CSI for sub-configuration indexes #2 and #3 are omitted (dropped), rather than Part 2 for all sub-configuration indexes being omitted (dropped), and Part 2 CSI for sub-configuration index #1 can be included in the CSI report.

[0126] However, the present invention is not limited to application in transmission and reception of uplink and / or downlink signals. For example, the present invention can also be used in direct communication between terminals. Furthermore, the concept of a base station in the present invention includes not only a base station but also a relay node. For example, the operation of a base station in the present invention may be performed by a base station, or may be performed by a relay node.

[0127] An example of the proposed method described above can also be included as one of the methods for implementing the present invention, and is therefore recognized as a type of proposed method. The proposed methods described above may be implemented independently, or may be implemented in the form of a combination (or merging) of some of the proposed methods. Rules can be defined so that information regarding whether the proposed method described above is applied (or information regarding the rules of the proposed method) is notified by a base station to a terminal or by a transmitting terminal to a receiving terminal via a predefined signal (e.g., a physical layer signal or an upper layer signal).

[0128] Example

[0129] FIG. 6 is a flowchart illustrating a signal transmission and reception method according to an embodiment of the present invention.

[0130] Referring to FIG. 6, an embodiment of the present invention may be performed by a terminal and may include a step of receiving a CSI reporting configuration (S401), a step of receiving a CSI-RS on a CSI-RS resource based on the CSI reporting configuration (S403), and a step of transmitting a CSI report based on measurement results for the CSI-RS (S405).

[0131] In addition to the operations of FIG. 6, one or more of the operations described in Section 1 may additionally be performed.

[0132] The CSI reporting configuration in Figure 6 may be an RRC parameter, CSI-ReportConfig. One CSI reporting configuration may include one or more CSI-RS resource set configurations. One CSI-RS resource set configuration may include one or more CSI-RS resource configurations. Table 4 illustrates CSI-RS resource configurations that can be configured via RRC signaling.

[0133] As described above, CSI in a conventional NR system can be divided into Type 1 CSI and Type 2 CSI. Each type of CSI is divided into Part 1 CSI and Part 2 CSI. Also, referring to Table 7, Part 2 CSI of e Type 2 CSI includes Group 0 CSI, Group 2 CSI, and Group 2 CSI.

[0134] A priority level is determined for each CSI report as shown in Figures 4 and 5. In conventional NR systems, a larger CSI report number (or CSI report index) has a lower priority, and within the same CSI report number, a higher group index has a lower priority. However, UCI included in G0 (Group 0 CSI) is set to the highest priority (priority 0) regardless of the CSI report number. If necessary, the terminal can omit all Part 2 CSI of the corresponding priority level in ascending order of priority (highest priority index).

[0135] According to the content proposed in this specification in addition to the conventional NR system, L sub-configurations can be included in the CSI-ReportConfig. Each sub-configuration can correspond to a spatial domain adaptation pattern or a power domain adaptation pattern. Since the spatial domain adaptation pattern corresponds to a specific number of antenna ports, each sub-configuration can include parameters related to the specific number of antenna ports. Since the power domain adaptation pattern corresponds to a specific power offset value, each sub-configuration can include parameters related to the specific power offset value.

[0136] As described above, CSI corresponding to one sub-configuration included in a specific CSI reporting configuration is included in a CSI report and fed back to the base station. To distinguish it from a CSI report corresponding to a CSI reporting configuration, the CSI report corresponding to a sub-configuration may be referred to as a CSI sub-report (or sub-report).

[0137] In each method herein, priority and bypass rules for sub-settings are disclosed against this background.

[0138] In particular, with reference to Method #2, the priority and omission rules are disclosed when a CSI report other than priority 0 contains multiple sub-reports.

[0139] Specifically, Method 2 discloses the following:

[0140] As an example of "a method of subdividing priorities between even / odd sub-band CSI and CSI assuming a maximum of two AP (antenna port) numbers," when there is CSI assuming 64 APs and CSI assuming 32 APs, the priority levels can be subdivided in the following order: priority 1 is CSI information corresponding to even sub-bands among CSI assuming 64 APs; priority 2 is CSI information corresponding to even sub-bands among CSI assuming 32 APs; priority 3 is CSI information corresponding to odd sub-bands among CSI assuming 64 APs; and priority 4 is CSI information corresponding to odd sub-bands among CSI assuming 32 APs.

[0141] Referring to FIG. 5, in a conventional NR system, CSI corresponding to even sub-bands is group 1 CSI, and CSI corresponding to odd sub-bands is group 2 CSI. Furthermore, since CSI assuming 64 APs is a spatial domain adaptation pattern related to the configuration of the number of antenna ports, it corresponds to a sub-CSI report corresponding to a sub-configuration. Therefore, the proposal of Method #2 can be understood as subdividing Group 1 CSI or Group 2 CSI, which conventionally correspond to the same priority level, by sub-configuration level. When the priority level is subdivided based on the sub-configuration level, the terminal can omit CSI for each sub-configuration level even within the same priority level, rather than omitting all information for a specific priority level as in the conventional system. Therefore, the terminal omits sub-reports for even sub-bands according to the priority of the sub-configuration level (omitting sub-reports in Group 1 CSI in descending order of sub-configuration index), and omits sub-reports for odd sub-bands according to the priority of the sub-configuration level (omitting sub-reports in Group 2 CSI in descending order of sub-configuration index). Since only sub-reports for even sub-bands or only sub-reports for odd sub-bands are included within the same priority level, after the sub-report group 2 CSI corresponding to a specific sub-configuration index n is omitted, the sub-report group 2 CSI corresponding to the sub-configuration index n-1 is omitted first before the sub-report group 1 CSI corresponding to the sub-configuration index n is omitted.

[0142] In summary, in a situation where multiple CSI reporting configurations are received in a terminal and the terminal transmits multiple CSI reports as shown in FIG. 6, if a first CSI reporting configuration including a sub-configuration corresponds to a first CSI including a sub-report, omission of Part 2 CSI for a second CSI report is performed at the sub-configuration level within the same priority level. For a second CSI report that does not include a sub-configuration, the same operation as in a conventional NR system is performed. Therefore, based on the fact that a second CSI reporting configuration that does not include a sub-configuration corresponds to a second CSI report that does not include a sub-report, omission of Part 2 CSI for a second CSI report is performed for all information at a specific priority level.

[0143] In addition to the operations described in connection with FIG. 6, one or more of the operations described through FIGS. 1 to 5 and / or the operations described in Section 1 may be combined and performed additionally.

[0144] An example of a communication system to which the present invention is applied

[0145] Without being limited thereto, the various descriptions, functions, procedures, suggestions, methods and / or flow charts of the present invention disclosed in this specification may be applied to various fields requiring device-to-device wireless communication / connection (e.g., 5G).

[0146] Hereinafter, a more detailed description will be given with reference to the drawings. In the following drawings / description, the same reference numerals indicate the same or corresponding hardware blocks, software blocks or function blocks unless otherwise specified.

[0147] FIG. 7 is a diagram illustrating a communication system 1 to which the present invention is applied.

[0148] Referring to FIG. 7, a communication system 1 applicable to the present invention includes wireless devices, base stations, and a network. Here, the wireless devices refer to devices that communicate using wireless connection technologies (e.g., 5G NR, LTE), and are also referred to as communication / wireless / 5G devices. The wireless devices include, but are not limited to, a robot 100a, vehicles 100b-1 and 100b-2, an XR (eXtended Reality) device 100c, a handheld device 100d, a home appliance 100e, an IoT (Internet of Things) device 100f, and an AI server / device 400. For example, the vehicles include vehicles equipped with wireless communication capabilities, autonomous vehicles, vehicles capable of vehicle-to-vehicle communication, and the like. Here, the vehicles include unmanned aerial vehicles (UAVs) (e.g., drones). XR devices include Augmented Reality (AR), Virtual Reality (VR), and Mixed Reality (MR) devices, and are embodied in the form of Head-Mounted Devices (HMDs), Head-Up Displays (HUDs) mounted on vehicles, TVs, smartphones, computers, wearable devices, home appliances, digital billboards, vehicles, robots, etc. Mobile devices include smartphones, smart pads, wearable devices (e.g., smart watches, smart glasses), computers (e.g., laptops, etc.), etc. Home appliances include TVs, refrigerators, washing machines, etc. IoT devices include sensors, smart meters, etc. For example, base stations and networks may also be embodied as wireless devices, and a specific wireless device 200a may operate as a base station / network node for other wireless devices.

[0149] The wireless devices 100a to 100f are connected to a network 300 via a base station 200. Artificial Intelligence (AI) technology is applied to the wireless devices 100a to 100f, and the wireless devices 100a to 100f are connected to an AI server 400 via the network 300. The network 300 is configured using a 3G network, a 4G (e.g., LTE) network, or a 5G (e.g., NR) network. The wireless devices 100a to 100f can communicate with each other via the base station 200 / network 300, but can also communicate directly without going through the base station / network (e.g., sidelink communication). For example, vehicles 100b-1 and 100b-2 can communicate directly (e.g., V2V (Vehicle to Vehicle) / V2X (Vehicle to Everything) communication). IoT devices (e.g., sensors) can also communicate directly with other IoT devices (e.g., sensors) or other wireless devices 100a to 100f.

[0150] Wireless communication / connections 150a, 150b, and 150c are performed between the wireless devices 100a to 100f and the base stations 200, and between the base stations 200. Here, the wireless communication / connections are performed using various wireless connection technologies such as uplink / downlink communication 150a and sidelink communication 150b (or D2D communication), and communication between base stations 150c (e.g., relay, Integrated Access Backhaul (IAB)) (e.g., 5G NR). Through the wireless communication / connections 150a, 150b, and 150c, the wireless devices and the base stations, and the base stations, can transmit / receive wireless signals to / from each other. For example, the wireless communication / connections 150a, 150b, and 150c can transmit / receive signals via various physical channels. To this end, according to various proposals of the present invention, any one of various configuration information setting processes for transmitting / receiving wireless signals, various signal processing processes (e.g., channel coding / decoding, modulation / demodulation, resource mapping / demapping, etc.), and resource allocation processes is performed.

[0151] Examples of wireless devices to which the present invention is applied

[0152] FIG. 8 is a diagram illustrating a wireless device to which the present invention can be applied.

[0153] 8, a first wireless device 100 and a second wireless device 200 transmit and receive wireless signals using various wireless access technologies (e.g., LTE, NR). Here, {first wireless device 100, second wireless device 200} corresponds to {wireless devices 100a-100f, base station 200} and / or {wireless devices 100a-100f, wireless devices 100a-100f} in FIG. 7.

[0154] The first wireless device 100 includes one or more processors 102 and one or more memories 104, and further includes one or more transceivers 106 and / or one or more antennas 108. The processor 102 is configured to control the memory 104 and / or the transceiver 106 to implement the descriptions, functions, procedures, suggestions, methods, and / or flowcharts disclosed herein. For example, the processor 102 processes information in the memory 104 to generate first information / signals and then transmits a wireless signal including the first information / signals via the transceiver 106. The processor 102 also receives a wireless signal including a second information / signal via the transceiver 106 and then stores information obtained from signal processing of the second information / signals in the memory 104. The memory 104 is coupled to the processor 102 and stores various information related to the operation of the processor 102. For example, the memory 104 stores software code including instructions for performing some or all of the processes controlled by the processor 102 or for implementing the descriptions, functions, procedures, suggestions, methods, and / or flowcharts disclosed herein. Here, the processor 102 and memory 104 are part of a communication modem / circuit / chip designed to implement a wireless communication technology (e.g., LTE, NR). The transceiver 106 is coupled to the processor 102 and transmits and / or receives wireless signals via one or more antennas 108. The transceiver 106 includes a transmitter and / or a receiver. The transceiver 106 may also be referred to as an RF (radio frequency) unit. In the present invention, a wireless device may also refer to a communication modem / circuit / chip.

[0155] The second wireless device 200 includes one or more processors 202 and one or more memories 204, and further includes one or more transceivers 206 and / or one or more antennas 208. The processor 202 is configured to control the memory 204 and / or the transceiver 206 to implement the descriptions, functions, procedures, suggestions, methods, and / or flowcharts disclosed herein. For example, the processor 202 processes information in the memory 204 to generate third information / signal, and then transmits a wireless signal including the third information / signal via the transceiver 206. The processor 202 also receives a wireless signal including a fourth information / signal via the transceiver 206, and then stores information obtained from signal processing of the fourth information / signal in the memory 204. The memory 204 is coupled to the processor 202 and stores various information related to the operation of the processor 202. For example, the memory 204 stores software code including instructions for performing some or all of the processes controlled by the processor 202 or for implementing the descriptions, functions, procedures, suggestions, methods, and / or flowcharts disclosed herein. Here, the processor 202 and memory 204 are part of a communication modem / circuit / chip designed to implement a wireless communication technology (e.g., LTE, NR). The transceiver 206 is coupled to the processor 202 and transmits and / or receives wireless signals via one or more antennas 208. The transceiver 206 includes a transmitter and / or a receiver. The transceiver 206 may also be referred to as an RF unit. In the present invention, a wireless device may also refer to a communication modem / circuit / chip.

[0156] The hardware elements of the wireless device 100, 200 are described in more detail below. Without limitation, 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, and SDAP). The 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, suggestions, methods, and / or flowcharts disclosed herein. The one or more processors 102, 202 may generate messages, control information, data, or information according to the descriptions, functions, procedures, suggestions, methods, and / or flowcharts disclosed herein. The one or more processors 102, 202 generate signals (e.g., baseband signals) including PDUs, SDUs, messages, control information, data, or information according to the functions, procedures, suggestions, and / or methods disclosed herein and provide them to the one or more transceivers 106, 206. The one or more processors 102, 202 receive signals (e.g., baseband signals) from the one or more transceivers 106, 206 and obtain the PDUs, SDUs, messages, control information, data, or information according to the descriptions, functions, procedures, suggestions, methods, and / or flowcharts disclosed herein.

[0157] The one or more processors 102, 202 may also be referred to as a controller, microcontroller, microprocessor, or microcomputer. The one or more processors 102, 202 may be implemented using hardware, firmware, software, or a combination thereof. For example, the one or more processors 102, 202 may include 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). The descriptions, functions, procedures, suggestions, methods, and / or flowcharts disclosed herein may be implemented using firmware or software, and the firmware or software may be embodied to include modules, procedures, functions, etc. Firmware or software configured to perform the descriptions, functions, procedures, suggestions, methods, and / or flowcharts disclosed herein may be included in the one or more processors 102, 202 or may be stored in one or more memories 104, 204 and executed by the one or more processors 102, 202. The descriptions, functions, procedures, suggestions, methods and / or flow charts disclosed in this specification may be embodied using firmware or software in the form of code, instructions and / or sets of instructions.

[0158] The one or more memories 104, 204 may be coupled to the one or more processors 102, 202 and may store various types of data, signals, messages, information, programs, code, instructions, and / or instructions. The one or more memories 104, 204 may be comprised of 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 internal and / or external 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 techniques, such as wired or wireless connections.

[0159] One or more transceivers 106, 206 can transmit user data, control information, wireless signals / channels, etc., as referenced in the methods and / or flowcharts herein to one or more other devices. One or more transceivers 106, 206 can receive user data, control information, wireless signals / channels, etc., as referenced in the descriptions, functions, procedures, suggestions, methods and / or flowcharts herein from one or more other devices. For example, one or more transceivers 106, 206 can be coupled 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. Also, one or more processors 102, 202 can control one or more transceivers 106, 206 to receive user data, control information, or wireless signals from one or more other devices. Furthermore, one or more transceivers 106, 206 are coupled to one or more antennas 108, 208 and are configured to transmit and receive user data, control information, radio signals / channels, etc., as referred to in the descriptions, functions, procedures, suggestions, methods, and / or flowcharts disclosed herein via the one or more antennas 108, 208. In this specification, one or more antennas may refer to multiple physical antennas or multiple logical antennas (e.g., antenna ports). The one or more transceivers 106, 206 convert the received user data, control information, radio signals / channels, etc., from RF band signals to baseband signals for processing by one or more processors 102, 202. The one or more transceivers 106, 206 convert the user data, control information, radio signals / channels, etc., processed by one or more processors 102, 202, from baseband signals to RF band signals. For this purpose, the one or more transceivers 106, 206 include (analog) oscillators and / or filters.

[0160] Examples of use of wireless devices to which this invention is applied

[0161] 9 is a diagram showing another example of a wireless device to which the present invention is applied. The wireless device may be embodied in various forms depending on the use case / service (see FIG. 7).

[0162] 9, wireless devices 100, 200 correspond to the wireless devices 100, 200 of FIG. 8 and are composed of various elements, components, units / sections, and / or modules. For example, the wireless devices 100, 200 include a communication unit 110, a control unit 120, a memory unit 130, and an additional element 140. The communication unit includes a communication circuit 112 and a transceiver 114. For example, the communication circuit 112 includes one or more processors 102, 202 and / or one or more memories 104, 204 in FIG. 8. For example, the transceiver 114 includes one or more transceivers 106, 206 and / or one or more antennas 108, 208 in FIG. 8. The control unit 120 is electrically coupled to the communication unit 110, the memory unit 130, and the additional element 140 and controls the overall operation of the wireless device. For example, the control unit 120 controls the electrical / mechanical operations of the wireless device based on the programs / codes / instructions / information stored in the memory unit 130. The control unit 120 also transmits the information stored in the memory unit 130 to the outside (e.g., another communication device) via the communication unit 110 via a wireless / wired interface, or stores information received from the outside (e.g., another communication device) via the communication unit 110 via a wireless / wired interface in the memory unit 130.

[0163] The additional element 140 may be configured in various ways depending on the type of wireless device. For example, the additional element 140 may include any one of a power unit / battery, an input / output unit (I / O unit), a driving unit, and a computer unit. Wireless devices may be embodied in the form of, but not limited to, a robot (FIG. 7, 100a), a vehicle (FIG. 7, 100b-1, 100b-2), an XR device (FIG. 7, 100c), a mobile device (FIG. 7, 100d), a home appliance (FIG. 7, 100e), an IoT device (FIG. 7, 100f), a digital broadcasting terminal, a hologram device, a public safety device, an MTC device, a medical device, a FinTech device (or financial device), a security device, a climate / environment device, an AI server / device (FIG. 7, 400), a base station (FIG. 7, 200), a network node, etc. Wireless devices may be mobile or fixed depending on the use case / service.

[0164] In FIG. 9, the various elements, components, units / sections and / or modules within the wireless devices 100, 200 are all connected to each other by wired interfaces or at least some are connected wirelessly by a communication section 110. For example, in the wireless devices 100 and 200, the control unit 120 and the communication unit 110 are connected by wire, and the control unit 120 and the first unit (e.g., 130, 140) are connected wirelessly via the communication unit 110. Furthermore, each element, component, unit / part and / or module in the wireless devices 100 and 200 further includes one or more elements. For example, the control unit 120 is configured with a set of one or more processors. For example, the control unit 120 is configured with a set of a communication control processor, an application processor, an ECU (Electronic Control Unit), a graphics processor, a memory control processor, etc. As another example, the memory unit 130 is configured with a RAM (Random Access Memory), a DRAM (Dynamic RAM), a ROM (Read Only Memory), a flash memory, a volatile memory, a non-volatile memory and / or a combination thereof.

[0165] Examples of vehicles or autonomous vehicles to which the present invention is applicable

[0166] 10 is a diagram illustrating an example of a vehicle or an autonomous vehicle to which the present invention is applied. The vehicle or the autonomous vehicle may be embodied as a mobile robot, a car, a train, an aerial vehicle (AV), a ship, etc.

[0167] 10, a vehicle or autonomous vehicle 100 includes an antenna unit 108, a communication unit 110, a control unit 120, a drive unit 140a, a power supply unit 140b, a sensor unit 140c, and an autonomous driving unit 140d. The antenna unit 108 is configured as part of the communication unit 110. Blocks 110 / 130 / 140a to 140d correspond to blocks 110 / 130 / 140 in FIG. 8, respectively.

[0168] The communication unit 110 transmits and receives signals (e.g., data, control signals, etc.) to and from external devices such as other vehicles, base stations (e.g., base stations, roadside units, etc.), and servers. The control unit 120 controls elements of the vehicle or autonomous vehicle 100 to perform various operations. The control unit 120 includes an ECU (Electronic Control Unit). The driving unit 140a causes the vehicle or autonomous vehicle 100 to move on the ground. The driving unit 140a includes an engine, a motor, a powertrain, wheels, brakes, a steering device, etc. The power supply unit 140b supplies power to the vehicle or autonomous vehicle 100 and includes wired / wireless charging circuits, a battery, etc. The sensor unit 140c can obtain vehicle status, surrounding environment information, user information, etc. The sensor unit 140c includes an IMU (inertial measurement unit) sensor, a collision sensor, a wheel sensor, a speed sensor, an inclination sensor, a weight detection sensor, a heading sensor, a position module, a vehicle forward / reverse sensor, a battery sensor, a fuel sensor, a tire sensor, a steering sensor, a temperature sensor, a humidity sensor, an ultrasonic sensor, an illuminance sensor, a pedal position sensor, etc. The autonomous driving unit 140d implements technology for maintaining a lane while driving, technology for automatically adjusting speed such as adaptive cruise control, technology for automatically driving along a predetermined route, technology for automatically setting a route and driving when a destination is set, etc.

[0169] For example, the communication unit 110 receives map data, traffic information data, etc. from an external server. The autonomous driving unit 140d generates an autonomous driving route and a driving plan based on the obtained data. The control unit 120 controls the driving unit 140a (e.g., adjusting speed / direction) so that the vehicle or autonomous vehicle 100 moves along the autonomous driving route according to the driving plan. The communication unit 110 aperiodically obtains the latest traffic information data from an external server during autonomous driving and also obtains surrounding traffic information data from surrounding vehicles. The sensor unit 140c also obtains vehicle status and surrounding environment information during autonomous driving. The autonomous driving unit 140d updates the autonomous driving route and driving plan based on the newly obtained data / information. The communication unit 110 transmits information regarding the vehicle position, autonomous driving route, driving plan, etc. to an external server. The external server can predict traffic information data using AI technology based on information collected from the vehicle or autonomous vehicle and provide the predicted traffic information data to the vehicle or autonomous vehicle.

[0170] It is obvious to those skilled in the art that the present invention can be embodied in other specific forms without departing from the characteristics of the present invention. Therefore, the above detailed description should not be construed as limiting in all respects, but should be considered as illustrative. The scope of the present invention should be determined by reasonable interpretation of the appended claims, and all modifications within the equivalent scope of the present invention are included in the scope of the present invention.

[0171] [Industrial Applicability] As mentioned above, the present invention can be applied to a variety of wireless communication systems.

[0172] [Claims at the time of international application] [Claim 1] A method for a terminal to transmit and receive signals in a wireless communication system, comprising: receiving a CSI (Channel State Information) reporting configuration; receiving a CSI-reference signal (CSI-RS) on a CSI-RS resource based on the CSI reporting configuration; and transmitting a CSI report based on the measurement result for the CSI-RS; For the CSI reports, each CSI report includes Part 1 CSI and Part 2 CSI; the part 2 CSI includes group 0 CSI, group 1 CSI, and group 2 CSI; different priority levels are determined for the Group 0 CSI, the Group 1 CSI, and the Group 2 CSI; based on a first CSI reporting configuration including a lower-level configuration among the CSI reporting configurations corresponding to a first CSI report including a lower-level report, omitting Part 2 CSI for the first CSI report is performed at a lower-level configuration level within the same priority level; and omitting Part 2 CSI for the second CSI report is performed for all information of a specific priority level, based on a second CSI reporting configuration, among the CSI reporting configurations, that does not include a sub-configuration, corresponding to a second CSI report that does not include a sub-report. [Claim 2] 2. The signal transmission and reception method of claim 1, wherein determining the priority level includes determining the Group 0 CSI for the CSI report to be the highest priority level, determining a higher priority level as the CSI reporting index becomes lower, and determining the Group 1 CSI to be a higher priority level than the Group 2 CSI within the same CSI reporting index. [Claim 3] The signal transmission and reception method according to claim 1 , wherein, in the first CSI reporting configuration, one lower-level configuration includes one parameter related to a power offset value. [Claim 4] 2. The signal transmission and reception method according to claim 1, wherein, in the first CSI reporting configuration, one lower-level configuration includes one parameter related to the number of antenna ports. [Claim 5] A terminal for transmitting and receiving signals in a wireless communication system, comprising: At least one transmitter / receiver; at least one processor; and at least one memory operatively connected to said at least one processor and storing instructions that, when executed, cause said at least one processor to perform certain operations; The specific operation is: receiving a CSI (Channel State Information) reporting configuration; receiving a CSI-reference signal (CSI-RS) on a CSI-RS resource based on the CSI reporting configuration; and transmitting a CSI report based on the measurement result for the CSI-RS; For the CSI reports, each CSI report includes Part 1 CSI and Part 2 CSI; the Part 2 CSI includes Group 0 CSI, Group 1 CSI, and Group 2 CSI; different priority levels are determined for the Group 0 CSI, the Group 1 CSI, and the Group 2 CSI; based on a first CSI reporting configuration including a lower-level configuration among the CSI reporting configurations corresponding to a first CSI report including a lower-level report, omitting Part 2 CSI for the first CSI report is performed at a lower-level configuration level within the same priority level; The terminal, based on the fact that a second CSI reporting configuration that does not include a sub-configuration among the CSI reporting configurations corresponds to a second CSI report that does not include a sub-report, omitting Part 2 CSI for the second CSI report is performed for all information of a specific priority level. [Claim 6] 6. The terminal of claim 5, wherein determining the priority level includes determining the Group 0 CSI for the CSI report to be the highest priority level, determining a higher priority level as the CSI reporting index becomes lower, and determining the Group 1 CSI to be a higher priority level than the Group 2 CSI within the same CSI reporting index. [Claim 7] The terminal of claim 5, wherein, in the first CSI reporting configuration, one lower-level configuration includes one parameter related to a power offset value. [Claim 8] The terminal of claim 5, wherein, in the first CSI reporting configuration, one lower-level configuration includes one parameter related to the number of antenna ports. [Claim 9] 1. An apparatus for a terminal, comprising: at least one processor; and at least one computer memory operatively connected to said at least one processor and that, when executed, causes said at least one processor to perform operations; The operation is receiving a CSI (Channel State Information) reporting configuration; receiving a CSI-reference signal (CSI-RS) on a CSI-RS resource based on the CSI reporting configuration; and transmitting a CSI report based on the measurement result for the CSI-RS; For the CSI reports, each CSI report includes Part 1 CSI and Part 2 CSI; the Part 2 CSI includes Group 0 CSI, Group 1 CSI, and Group 2 CSI; different priority levels are determined for the Group 0 CSI, the Group 1 CSI, and the Group 2 CSI; based on a first CSI reporting configuration including a lower-level configuration among the CSI reporting configurations corresponding to a first CSI report including a lower-level report, omitting Part 2 CSI for the first CSI report is performed at a lower-level configuration level within the same priority level; the omission of Part 2 CSI for the second CSI report is performed for all information of a specific priority level, based on a second CSI reporting configuration among the CSI reporting configurations that does not include a sub-configuration corresponding to a second CSI report that does not include a sub-report. [Claim 10] A computer-readable non-volatile storage medium containing at least one computer program that causes at least one processor to perform operations, The operation is receiving a CSI (Channel State Information) reporting configuration; receiving a CSI-reference signal (CSI-RS) on a CSI-RS resource based on the CSI reporting configuration; and transmitting a CSI report based on the measurement result for the CSI-RS; For the CSI reports, each CSI report includes Part 1 CSI and Part 2 CSI; the Part 2 CSI includes Group 0 CSI, Group 1 CSI, and Group 2 CSI; different priority levels are determined for the Group 0 CSI, the Group 1 CSI, and the Group 2 CSI; based on a first CSI reporting configuration including a lower-level configuration among the CSI reporting configurations corresponding to a first CSI report including a lower-level report, omitting Part 2 CSI for the first CSI report is performed at a lower-level configuration level within the same priority level; A storage medium, wherein, based on the fact that a second CSI reporting configuration among the CSI reporting configurations, which does not include a sub-configuration, corresponds to a second CSI report that does not include a sub-report, omission of Part 2 CSI for the second CSI report is performed for all information of a specific priority level.

Claims

1. A method for a terminal to transmit and receive signals in a wireless communication system, comprising: receiving a Channel State Information (CSI) reporting configuration; receiving a CSI-reference signal (CSI-RS) on a CSI-RS resource based on the CSI reporting configuration; and transmitting a CSI report based on the measurement result for the CSI-RS; For the CSI reports, each CSI report includes Part 1 CSI and Part 2 CSI; the Part 2 CSI includes Group 0 CSI, Group 1 CSI, and Group 2 CSI; Different priority levels are determined for the group 0 CSI, the group 1 CSI, and the group 2 CSI; Based on the fact that a first CSI reporting configuration including a sub-configuration among the CSI reporting configurations corresponds to a first CSI report including a sub-report, omission of Part 2 CSI for the first CSI report is performed at a sub-configuration level within the same priority level; A signal transmission / reception method in which, based on the fact that a second CSI reporting setting among the CSI reporting settings, which does not include a sub-setting, corresponds to a second CSI report which does not include a sub-report, omission of Part 2 CSI for the second CSI report is performed for all information of a specific priority level.

2. 2. The signal transmission and reception method of claim 1, wherein determining the priority level includes determining the Group 0 CSI for the CSI report to be the highest priority level, determining a higher priority level as the CSI report index becomes lower, and determining the Group 1 CSI to be a higher priority level than the Group 2 CSI within the same CSI report index.

3. The signal transmission and reception method according to claim 1 , wherein, in the first CSI reporting configuration, one sub-configuration includes one parameter related to a power offset value.

4. The signal transmission and reception method according to claim 1 , wherein one sub-configuration in the first CSI reporting configuration includes one parameter related to the number of antenna ports.

5. A terminal for transmitting and receiving signals in a wireless communication system, comprising: at least one transceiver; at least one processor; and at least one memory operatively connected to said at least one processor and storing instructions that, when executed, cause said at least one processor to perform certain operations; The specific operation is: receiving a Channel State Information (CSI) reporting configuration; receiving a CSI-reference signal (CSI-RS) on a CSI-RS resource based on the CSI reporting configuration; and transmitting a CSI report based on the measurement result for the CSI-RS; For the CSI reports, each CSI report includes Part 1 CSI and Part 2 CSI; the Part 2 CSI includes Group 0 CSI, Group 1 CSI, and Group 2 CSI; Different priority levels are determined for the group 0 CSI, the group 1 CSI, and the group 2 CSI; Based on the fact that a first CSI reporting configuration including a sub-configuration among the CSI reporting configurations corresponds to a first CSI report including a sub-report, omission of Part 2 CSI for the first CSI report is performed at a sub-configuration level within the same priority level; A terminal, in which the omission of Part 2 CSI for the second CSI report is performed for all information of a specific priority level based on the fact that a second CSI reporting setting among the CSI reporting settings, which does not include a sub-setting, corresponds to a second CSI report which does not include a sub-report.

6. 6. The terminal of claim 5, wherein determining the priority level includes determining the Group 0 CSI for the CSI report to be the highest priority level, determining a higher priority level as the CSI report index becomes lower, and determining the Group 1 CSI to be a higher priority level than the Group 2 CSI within the same CSI report index.

7. The terminal of claim 5, wherein, in the first CSI reporting configuration, one sub-configuration includes one parameter related to a power offset value.

8. The terminal of claim 5, wherein, in the first CSI reporting configuration, one sub-configuration includes one parameter related to the number of antenna ports.

9. 1. An apparatus for a terminal, comprising: at least one processor; and at least one computer memory operatively connected to said at least one processor and that, when executed, causes said at least one processor to perform operations; The operation is receiving a Channel State Information (CSI) reporting configuration; receiving a CSI-reference signal (CSI-RS) on a CSI-RS resource based on the CSI reporting configuration; and transmitting a CSI report based on the measurement result for the CSI-RS; For the CSI reports, each CSI report includes Part 1 CSI and Part 2 CSI; the Part 2 CSI includes Group 0 CSI, Group 1 CSI, and Group 2 CSI; Different priority levels are determined for the group 0 CSI, the group 1 CSI, and the group 2 CSI; Based on the fact that a first CSI reporting configuration including a sub-configuration among the CSI reporting configurations corresponds to a first CSI report including a sub-report, omission of Part 2 CSI for the first CSI report is performed at a sub-configuration level within the same priority level; A device, wherein omission of Part 2 CSI for the second CSI report is performed for all information of a specific priority level based on the fact that a second CSI reporting setting among the CSI reporting settings, which does not include a sub-setting, corresponds to a second CSI report which does not include a sub-report.

10. A computer-readable non-volatile storage medium containing at least one computer program that causes at least one processor to perform operations, comprising: The operation is receiving a Channel State Information (CSI) reporting configuration; receiving a CSI-reference signal (CSI-RS) on a CSI-RS resource based on the CSI reporting configuration; and transmitting a CSI report based on the measurement result for the CSI-RS; For the CSI reports, each CSI report includes Part 1 CSI and Part 2 CSI; the Part 2 CSI includes Group 0 CSI, Group 1 CSI, and Group 2 CSI; Different priority levels are determined for the group 0 CSI, the group 1 CSI, and the group 2 CSI; Based on the fact that a first CSI reporting configuration including a sub-configuration among the CSI reporting configurations corresponds to a first CSI report including a sub-report, omission of Part 2 CSI for the first CSI report is performed at a sub-configuration level within the same priority level; A storage medium in which, based on the fact that a second CSI reporting setting among the CSI reporting settings that does not include a sub-setting corresponds to a second CSI report that does not include a sub-report, the omission of Part 2 CSI for the second CSI report is performed for all information of a specific priority level.

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