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 in the present specification transmit a CSI report via a PUCCH resource, where the PUCCH resource may be determined based on an assumption that each CSI sub-report in the CSI report has a rank of 1.

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] As one aspect of the present invention, there is provided a method for a terminal to transmit and receive signals in a wireless communication system, the method including (comprising; configuring; establishing; configuring; encompassing; containing; having); receiving a CSI (Channel State Information) reporting configuration; receiving a CSI-RS on a CSI-reference signal (CSI-RS) resource based on the CSI reporting configuration; and transmitting a CSI report based on a measurement result for the CSI-RS, wherein the CSI report is transmitted via a PUCCH resource, and the PUCCH resource is determined based on an assumption that each CSI sub-report in the CSI report indicates rank 1.

[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] 1 is a diagram illustrating a signal transmission and reception method according to an embodiment of the present invention. [Figure 5-8] 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 PDCCH, whereas in CS, PDSCH transmission is not accompanied by 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] In particular, this specification proposes a method for handling cases where a collision occurs on the time axis with other CSI reports by setting and / or defining a priority rule for a CSI report that includes CSI assuming multiple numbers of APs and / or multiple power offset values.

[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 antenna ports (APs) related to downlink signals / channels or adjusts 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 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) in one CSI report for one CSI-RS resource or each of multiple CSI-RS resources in a CSI-RS resource set. The base station can reduce its power consumption by determining the optimal number of APs and PDSCH transmission power / MCS based on the information in the report. 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] Hereinafter, in the present invention, "power offset" may refer to powerControlOffset, 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 a 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 RE relative to NZP CSI-RS RE, or may refer to powerControlOffsetSS, an RRC parameter indicating the ratio between NZP CSI-RS EPRE and SS / PBCH block. 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.

[0061] 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.

[0062] 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.

[0063] [Table 4]

[0064] [Table 5]

[0065] 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 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 number of APs in the 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 adjusting downlink power and / or the number of APs. For convenience, this specification mainly describes methods for configuring CSI-RS resources and CSI-RS resource sets for multiple power offset values, and methods for CSI configuration and reporting.However, the present invention is also applicable to the configuration methods of CSI-RS resources and CSI-RS resource sets for multiple numbers of APs, as well as the CSI configuration and reporting methods. Also, CSI information for multiple power offset values ​​and numbers of APs can be transmitted together as one CSI report.

[0066] 3GPP TS 38.214 Section 5.2.5 discloses a method for calculating and handling the priority value of a CSI report, as shown in Table 6. When multiple CSI reports are configured for a terminal and the OFDM symbols occupied by two CSI reports overlap by at least one symbol within the same carrier, a collision is defined as occurring between the two CSI reports. According to the collision rules in Table 6, the CSI report with the lower priority is not transmitted, or one CSI report is transmitted according to the multiplexing rules.

[0067] [Number 1]

[0068] Pri iCSI (y,k,c,s)=2N cells M s· y+N cells· M s· k+M s· c+s

[0069] [Table 6]

[0070] Equation 1 above can be interpreted as the priority rules listed on the right side of Table 6 based on the parameters on the left side of Table 6. For example, according to Rule 1, priorities are determined according to the channel on which the CSI report is transmitted and the time-domain behavior. An example of the time-domain behavior is the periodicity / non-periodicity of the CSI report. According to Rule 1, aperiodic CSI transmitted via the PUSCH has the highest priority, and periodic CSI transmitted via the PUCCH has the lowest priority. Therefore, if a collision occurs between aperiodic CSI on the PUSCH and periodic CSI on the PUCCH, where the aperiodic CSI overlaps at least one symbol on the same carrier, the periodic CSI on the PUCCH is dropped and not transmitted, and the aperiodic CSI on the PUSCH is transmitted with priority. Rule 2 is applied between CSI reports with the same priority according to Rule 1. According to Rule 2, priorities are determined according to the contents of the CSI report. For example, a CSI report containing CSI related to beam management, such as L1-RSRP or L1-SINR, is transmitted with priority over a CSI report containing PMI or other different CSI. Thus, for CSI reports that have the same priority according to a specific rule, the following rule applies:

[0071] 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.).

[0072] Meanwhile, at least one CSI framework can be introduced using the following methods:

[0073] - 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.

[0074] - 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).

[0075] - 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.

[0076] Under the above CSI framework, the CSI reporting method can be defined by at least one of the following options:

[0077] 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.

[0078] - 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.

[0079] - 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.

[0080] 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.

[0081] 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.

[0082] 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 to CSI-RS index #n1 belonging to a resource set and a power value P2 is configured to 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 to 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).

[0083] [Method #1] When a collision occurs between CSI reports, the CSI content in each CSI report is compared, and the priority between a CSI report including CSI calculated assuming multiple AP numbers or multiple power offset values ​​and a CSI report including other CSI, and / or the priority between a cell operating in NES and a cell operating in non-NES, is set / instructed / defined in advance.

[0084] When a collision occurs between two CSI reports, the priorities of the two CSI reports are compared based on a first collision rule (i.e., the channel and time-domain operation through which the CSI reports are transmitted). When the two CSI reports have the same priority, the CSI contents included in the two CSI reports are compared to determine the priority based on a second collision rule. In this case, the base station may pre-set / indicate the priority of a CSI report including CSI calculated assuming multiple AP numbers or multiple power offset values. Alternatively, the priority may be defined in a standard document or the like and pre-stored in the terminal. For example, a CSI report including beam-related CSI such as L1-RSRP or L1-SINR may be set to the highest priority, and a CSI calculated assuming multiple AP numbers or multiple power offset values ​​may be set to the next highest priority. Alternatively, conversely, depending on the purpose or need of the base station (e.g., when the base station operates in a normal operation mode (non-NES mode)), a CSI report including CSI calculated assuming multiple AP numbers or multiple power offset values ​​may be set to the lowest priority.

[0085] In addition, the priority between a CSI report including CSI calculated assuming multiple numbers of APs and a CSI report including CSI calculated assuming multiple power offset values ​​may also be set / indicated / defined in advance. For example, individual priorities may be set for each number of APs, each power offset value, or a combination thereof. Specifically, when CSI assuming multiple numbers of APs exists, only CSI calculated assuming 64 APs or CSI calculated assuming a 3 dB power offset is set as high priority, and if a collision occurs between two CSI reports, the CSI report assuming 64 APs is transmitted. As yet another example, in order to prioritize CSI with higher accuracy, a higher priority may be given to 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).

[0086] As another example, the base station may pre-configure / instruct the CSI report assuming a plurality of AP numbers and a plurality of power offset values ​​to have the highest priority, and then pre-configure / instruct the CSI report assuming a plurality of AP numbers to have a higher priority than the CSI report assuming a plurality of power offset values. When three CSI reports including different CSIs exist and a collision occurs between two different CSI reports, CSI report A may include all CSIs calculated assuming a plurality of AP numbers and a plurality of power offset values, CSI report B may include CSIs calculated assuming a plurality of AP numbers, and CSI report C may include CSIs assuming a plurality of power offset values. Based on the pre-configured priorities, the terminal may transmit CSI report A when CSI report A collides with CSI report B or C, and may preferentially transmit CSI report B when CSI report B collides with CSI report C. Alternatively, when a collision occurs between CSI reports, the base station may multiplex and transmit two CSIs instead of dropping one of them. In this case, the CSI with higher priority is mapped first, and if the amount of resources allocated to the CSI report is small relative to the payload size, the CSI with lower priority may be omitted.

[0087] On the other hand, if the priorities of two CSI reports based on CSI content are the same, the priority is determined by comparing the cell indexes of the serving cells. In this case, the CSI report of the cell operating as the NES may be preset / instructed / defined to have the next highest priority or the highest priority after the P-cell (primary cell) and the PS-cell (primary secondary cell). Conversely, depending on the purpose / need of the base station (e.g., when the base station operates in a normal operation mode (non-NES mode)), the CSI report of the cell operating as the NES may be set to a lower priority than the P-cell and the PS-cell. In this case, the base station may apply different priorities through an explicit instruction (group common DCI / MAC-CE) or may apply the priority in conjunction with an implicit instruction (instruction of NES or non-NES mode / state=ON). Here, configuring / instructing CSI reporting assuming multiple numbers of APs and / or multiple power offset values ​​(or configuring / instructing CSI reporting for NES) may mean that CSI corresponding to N or more (N>1) sub-configurations out of a total of L sub-configurations pre-configured in the terminal is fed back via PUCCH or PUSCH in one CSI reporting instance.

[0088] In the proposed 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 may correspond to sub-configuration index #0 and sub-configuration index #1, respectively. Furthermore, the base station may configure / instruct a CSI report to report multiple CSIs corresponding to N sub-configurations among L sub-configurations configured in the CSI reporting configuration as one CSI report. Thus, the number of CSIs corresponding to the sub-configuration indexes included in each CSI report or the CSI information corresponding to each sub-configuration index may differ. Therefore, when calculating the priority of each CSI report using the formula in Table 7, both the sub-configuration index and the number of sub-configuration indexes included in the CSI report may be taken into consideration.

[0089] [Table 7]

[0090] 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 of sub-configurations q 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.

[0091] As another example, Pr iiCSI (y,k,c,s,q)=2 q max Ncells M s y+q max N cells M s k+q max M s c+q max s+q, the sub-setting index q and the maximum number of sub-setting indexes q max is added to the formula as a parameter. 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.

[0092] [Method #2] CSI Transmission Method Assuming Multiple AP Numbers and / or Multiple Power Offset Values ​​Through Multiple CSI PUCCH Resources

[0093] A single CSI report can be transmitted through a PUCCH resource configured by the RRC parameter pucch-CSI-ResourceList. Multiple CSI reports can be transmitted through a PUCCH resource configured by the RRC parameter multi-CSI-PUCCH-ResourceList. If CSI reporting assuming multiple AP numbers and / or multiple power offset values ​​is configured / instructed for a UE (or CSI reporting for NES is configured / instructed) and multi-CSI-PUCCH-ResourceList is configured for the UE, the amount of CSI may be relatively larger than the amount of CSI calculated assuming a single AP number or a single power offset value. Thus, the base station can configure / instruct the UE to perform CSI reporting using PUCCH resources configured for multiple CSI reports, rather than the PUCCH resource for a single CSI report. Here, configuring / instructing CSI reporting assuming multiple numbers of APs and / or multiple power offset values ​​(or configuring / instructing CSI reporting for NES) may mean that CSI corresponding to N or more (N>1) sub-configurations out of a total of L sub-configurations pre-configured in the terminal is fed back via PUCCH or PUSCH in one CSI reporting instance.

[0094] That is, even if the condition for selecting multiple CSI PUCCHs is not met (e.g., even if the multi-CSI-PUCCH-ResourceList is configured but there is no overlap between multiple PUCCH resources or PUSCH / PUCCH resources), the UE that has received the configuration / instruction can select multiple CSI PUCCH resources instead of a single CSI PUCCH resource to perform CSI reporting when CSI calculated assuming multiple AP numbers and / or multiple power offset values ​​is triggered as one CSI report. Alternatively, the base station can configure separate PUCCH resources in advance in preparation for the case where CSI calculated assuming multiple AP numbers and / or multiple power offset values ​​is to be reported, and the UE can perform CSI reporting through the separate PUCCH resources. In this case, if the multi-CSI-PUCCH-ResourceList is not configured, the UE can report CSI information on a single CSI PUCCH or drop CSI information with lower priority and report only as much CSI as can be carried on a single CSI PUCCH resource.

[0095] If a collision occurs between CSI reports for different single AP numbers and single power offset values, the CSI may be multiplexed or only the CSI with the highest priority may be transmitted, and the other CSI reports may be dropped, depending on the UE's capability. That is, if the UE is capable of simultaneous reporting, it transmits two multiplexed CSIs over multiple CSI PUCCH resources. On the other hand, if it is not capable, the UE may calculate a priority rule between conventional CSI reports, transmit only one CSI with the highest priority, and drop the rest. Furthermore, if the base station suddenly instructs the UE to change the number of APs (or power offset value) through DCI while the UE is calculating CSI information assuming a specific number of APs (or a specific power offset value) in response to a base station instruction and preparing a report, the UE may calculate the corresponding CSI from the time of the DCI instruction and determine whether to drop the CSI report, taking into account a processing timeline, such as the start time of CSI report transmission. For example, if a CSI report for CSI assuming 64 APs is additionally instructed via DCI while the UE is calculating CSI assuming 32 APs and preparing a CSI report, the UE may drop the CSI report if there is insufficient processing time before transmitting the CSI report, taking into account the processing timeline. Alternatively, the UE may not expect the base station to change the number of APs (or power offset value) via DCI while calculating CSI assuming a specific number of APs (or a specific power offset value) and preparing a report.

[0096] Meanwhile, when the UE reports CSI via the PUCCH, it needs to calculate a UCI payload size for selecting a specific PUCCH resource from among multiple PUCCH resources configured in the UE. If the CSI report is related to multiple AP numbers (and / or multiple power offset values), the RANK-1 criterion for which AP number the UCI payload size should be assumed may be configured / instructed in advance by the base station. The UE may be configured / instructed to assume the UCI payload size based on the RANK-1 criterion for a specific AP number. Alternatively, the UE may be configured / instructed to assume the UCI payload size based on the sum of the CSI Part 2 payload sizes based on the RANK-1 criterion for each AP number (or, more generally, the RANK-1 criterion for each sub-configuration). In general, the UE may be configured / instructed to assume the UCI payload size based on the sum of the CSI Part 2 payload sizes based on the RANK-1 criterion for each sub-configuration. For example, if a terminal is instructed to report CSI assuming 32 APs and 64 APs and is pre-configured / instructed to assume a UCI payload size based on the largest AP number, the terminal can assume a UCI payload size based on RANK-1 for 64 APs and select a PUCCH resource that matches the payload size from the configured PUCCH resources.

[0097] [Method 3] Configuring multiple PUCCH resources for CSI reporting and selecting and transmitting specific PUCCH resources according to the number of activated / triggered sub-configurations

[0098] As a specific method for the base station to configure separate PUCCH resources to report CSI information calculated in advance assuming multiple numbers of APs and / or multiple power offset values, the terminal is configured with multiple PUCCH resources for CSI reporting from the base station, and can select and transmit a specific PUCCH resource to be used for CSI reporting depending on the number of sub-configurations that are actually activated / triggered.

[0099] Currently, according to 3GPP TS 38.331, only one PUCCH resource for transmitting a semi-persistent (SP)-CSI report can be configured per BWP. However, in case CSI corresponding to multiple sub-configurations is included in one CSI report and transmitted via the PUCCH, the base station can pre-configure multiple PUCCH resources for the terminal. For example, two PUCCH resources (or X>1) for the SP-CSI report are pre-allocated. The PUCCH resources can be indexed as PUCCH resource #1 and PUCCH resource #2. N is smaller than L, where L is the total number of configured sub-configurations and N is the number of sub-configurations actually triggered / activated as a CSI report among the L sub-configurations. The N value and the PUCCH resource can be pre-linked so that if N is 3 or less and a CSI report is triggered, PUCCH resource #1 is used to transmit the CSI report, and if N is 4 or more (more than 3), PUCCH resource #2 is used to transmit the CSI report.

[0100] As another example, when the base station configures / instructs the terminal to report one sub-configuration as a CSI report (i.e., N=1), PUCCH resource #1 may be pre-interlocked to be used. When the base station configures / instructs the terminal to report more than N=1 as a CSI report, PUCCH resource #2 may be pre-interlocked to be used. PUCCH resource #1 may be a PUCCH resource configured one per BWP according to the conventional NR system. PUCCH resource #2 may be a PUCCH resource that is distinct from the conventional PUCCH resource configured by the base station for CSI reporting for energy saving purposes. When the number of sub-configurations triggered / activated to be included in one CSI report is one, the terminal may perform CSI reporting using PUCCH resource #1, and when the number of sub-configurations triggered / activated to be included in one CSI report is more than one, the terminal may perform CSI reporting using PUCCH resource #2.

[0101] [Method #4] PUCCH resource configuration method for multiple CSI reports and method for selecting PUCCH resources to be used for CSI reporting based on the number of NES CSI reports (CSI information corresponding to multiple sub-configurations is included in one CSI report) on a transmission occasion (TO) or the number of triggered / activated sub-configurations

[0102] According to conventional 3GPP TS 38.213, the PUCCH resource to be selected varies depending on the number of CSI reports transmitted in one transmission occasion (TO) (i.e., whether it is a single CSI report or multiple CSI reports) (Table 8).

[0103] [Table 8]

[0104] If a TO corresponding to multiple CSI reports also includes a CSI report configured with L (L>1) sub-configurations, multi-CSI-PUCCH-ResourceList2 is configured in addition to the conventional multi-CSI-PUCCH-ResourceList. A different PUCCH resource may be pre-configured to be selected depending on whether an NES (for base station energy saving purposes) CSI report (a CSI report including CSI information corresponding to multiple sub-configurations) is included or the number of triggered / activated sub-sub-configurations. For example, in a situation where a terminal needs to transmit multiple CSI (HARQ-ACK / SR / CSI) via a PUCCH, if the base station has pre-configured / instructed the terminal to report one sub-configuration as a CSI report, the PUCCH resources configured in multi-CSI-PUCCH-ResourceList may be pre-configured to be used. If the number of multiplexed sub-configurations exceeds one (configured by the base station for CSI reporting for energy saving purposes), the PUCCH resources configured in multi-CSI-PUCCH-ResourceList2 may be pre-configured to be used. If there is one sub-configuration triggered / activated to be included in multiple CSI reports, the terminal may perform the CSI report using the PUCCH resources in multi-CSI-PUCCH-ResourceList, and if there is more than one sub-configuration, the terminal may transmit the CSI report using the PUCCH resources in multi-CSI-PUCCH-ResourceList2.

[0105] Alternatively, although currently, up to two PUCCH resources can be configured in the conventional multi-CSI-PUCCH-ResourceList, for NES CSI reporting, more PUCCH resources can be configured in Rel-18, and the CSI reports can be interlocked so that they are transmitted using different PUCCH resources depending on the number of NES CSI reports (CSI information corresponding to multiple sub-configurations is included in one CSI report) or the number of triggered / activated sub-configurations.

[0106] 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.

[0107] 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).

[0108] Example

[0109] FIG. 4 is a flowchart illustrating a signal transmission and reception method according to an embodiment of the present invention.

[0110] Referring to FIG. 4, 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).

[0111] In addition to the operations of FIG. 4, one or more of the operations described in Section 1 may additionally be performed.

[0112] The CSI reporting configuration in Figure 4 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.

[0113] 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.

[0114] According to the additional content proposed in this specification for conventional NR systems, L sub-configurations may be included in the CSI reporting configuration CSI-ReportConfig. Each sub-configuration may 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 may 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 may include parameters related to the specific power offset value.

[0115] 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).

[0116] In this context, the methods disclosed herein disclose determining PUCCH resources.

[0117] In particular, referring to Method #2, the terminal selects a specific PUCCH resource from among multiple configured PUCCH resources to transmit a CSI report on the PUCCH resource. If the CSI report is a CSI report concatenated with multiple AP numbers, i.e., if the CSI report is a CSI report including multiple sub-reports corresponding to multiple sub-configurations, it needs to determine for which AP number or power offset value the PUCCH resource should be selected assuming rank 1.

[0118] Referring to an example of Method #2, the base station can be configured / instructed to assume rank 1 for a specific reference number of APs or a specific power offset value, or can be configured / instructed to assume rank 1 for each number of APs or each power offset value.

[0119] Considering that the number of APs or the power offset value corresponds to a sub-configuration and the sub-configuration corresponds to a sub-report, the PUCCH resource is determined based on the assumption that a specific CSI sub-report indicates rank 1 (first assumption) or based on the assumption that each CSI sub-report within a CSI report indicates rank 1 (second assumption).

[0120] More specifically, when the terminal determines the PUCCH resource based on the second assumption, the terminal may calculate a UCI payload size based on the second assumption and select the PUCCH resource based on the calculated UCI payload size, where the calculated UCI payload size may be related to Part 2 CSI.

[0121] The selected PUCCH resource may be determined as the PUCCH resource set by multi-CSI-PUCCH-ResourceList, which is an RRC parameter for a single CSI report, or the PUCCH resource set by multi-CSI-PUCCH-ResourceList, which is an RRC parameter for a multiple CSI report. This is because even if the number of CSI reports is one, the amount of CSI is greater than that of a conventional single CSI report because the CSI report includes multiple CSI sub-reports.

[0122] Furthermore, the number of PRBs for the PUCCH resource can be determined based on the UCI payload size, MCS, code rate, number of PUCCH symbols, etc. If the UCI payload size is determined based on the second assumption, this can also be interpreted as the number of PRBs for the PUCCH resource being determined based on the second assumption.

[0123] In addition to the operations described in connection with FIG. 4, one or more of the operations described through FIGS. 1 to 3 and / or the operations described in Section 1 may be combined and performed additionally.

[0124] An example of a communication system to which the present invention is applied

[0125] Without being limited thereto, the various descriptions, features, 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).

[0126] 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.

[0127] FIG. 5 is a diagram illustrating a communication system 1 to which the present invention is applied.

[0128] Referring to FIG. 5, 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.

[0129] 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.

[0130] 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.

[0131] Examples of wireless devices to which the present invention is applied

[0132] FIG. 6 is a diagram illustrating a wireless device to which the present invention can be applied.

[0133] 6, 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. 5.

[0134] 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.

[0135] 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.

[0136] 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.

[0137] 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.

[0138] 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.

[0139] 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.

[0140] Examples of use of wireless devices to which this invention is applied

[0141] 7 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. 5).

[0142] Referring to Figure 7, wireless devices 100, 200 correspond to the wireless devices 100, 200 of Figure 6 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 Figure 6. For example, the transceiver 114 includes one or more transceivers 106, 206 and / or one or more antennas 108, 208 in Figure 6. 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.

[0143] 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 are not limited to, a robot (FIG. 5, 100a), a vehicle (FIG. 5, 100b-1, 100b-2), an XR device (FIG. 5, 100c), a mobile device (FIG. 5, 100d), a home appliance (FIG. 5, 100e), an IoT device (FIG. 5, 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. 5, 400), a base station (FIG. 5, 200), a network node, etc. Wireless devices may be mobile or fixed depending on the use case / service.

[0144] In FIG. 7, 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.

[0145] Examples of vehicles or autonomous vehicles to which the present invention is applicable

[0146] 8 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.

[0147] 8, 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. 7, respectively.

[0148] 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.

[0149] 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.

[0150] 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.

[0151] [Industrial Applicability] As mentioned above, the present invention can be applied to a variety of wireless communication systems.

[0152] [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; the CSI report is transmitted over a PUCCH resource; The signal transmission and reception method, wherein the PUCCH resource is determined based on an assumption that each CSI sub-report in the CSI report indicates rank 1. [Claim 2] The signal transmission and reception method according to claim 1, wherein the PUCCH resource is determined based on an uplink control channel (UCI) payload size calculated according to the assumption. [Claim 3] The signal transmission and reception method according to claim 1 , wherein each of the CSI sub-reports corresponds to an antenna port number or a power offset value. [Claim 4] The signal transmission and reception method of claim 1 , wherein the CSI report includes Part 2 CSI. [Claim 5] The signal transmission and reception method according to claim 1, wherein the number of PRBs (physical resource blocks) for the PUCCH resource is determined based on the assumption. [Claim 6] 2. The signal transmission / reception method of claim 1, wherein, based on the CSI report including a CSI sub-report, even if the number of CSI reports is one, the PUCCH resource is determined as the PUCCH resource for the multiple CSI reports out of the PUCCH resource for a single CSI report and the PUCCH resource for multiple CSI reports. [Claim 7] 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; the CSI report is transmitted over a PUCCH resource; The terminal, wherein the PUCCH resource is determined based on an assumption that each CSI sub-report in the CSI report indicates rank 1. [Claim 8] The terminal according to claim 7, wherein the PUCCH resource is determined based on an uplink control channel (UCI) payload size calculated according to the assumption. [Claim 9] The terminal of claim 7, wherein each of the CSI sub-reports corresponds to an antenna port number or a power offset value. [Claim 10] The terminal of claim 7 , wherein the CSI report includes Part 2 CSI. [Claim 11] The terminal of claim 7, wherein a number of physical resource blocks (PRBs) for the PUCCH resource is determined based on the assumption. [Claim 12] 8. The terminal of claim 7, wherein, based on the CSI report including a CSI sub-report, even if the number of CSI reports is one, the PUCCH resource is determined as the PUCCH resource for the multiple CSI reports among a PUCCH resource for a single CSI report and a PUCCH resource for multiple CSI reports. [Claim 13] 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; the CSI report is transmitted over a PUCCH resource; The apparatus, wherein the PUCCH resource is determined based on an assumption that each CSI sub-report in the CSI report has a rank of 1. [Claim 14] A computer-readable non-volatile storage medium, 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; the CSI report is transmitted over a PUCCH resource; The PUCCH resource is determined based on an assumption that each CSI sub-report in the CSI report has a rank of 1.

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; the CSI report is transmitted via a PUCCH resource; A signal transmission / reception method, wherein the PUCCH resource is determined based on an assumption that each CSI sub-report in the CSI report indicates rank 1.

2. The signal transmission / reception method of claim 1 , wherein the PUCCH resource is determined based on an uplink control channel (UCI) payload size calculated according to the assumption.

3. The method of claim 1 , wherein each of the CSI sub-reports corresponds to an antenna port number or a power offset value.

4. The method of claim 1 , wherein the CSI report includes Part 2 CSI.

5. The method of claim 1 , wherein the number of physical resource blocks (PRBs) for the PUCCH resource is determined based on the assumption.

6. 2. The signal transmission / reception method of claim 1, wherein, based on the CSI report including a CSI sub-report, even if the number of CSI reports is one, the PUCCH resource is determined as the PUCCH resource for the multiple CSI reports out of the PUCCH resource for a single CSI report and the PUCCH resource for multiple CSI reports.

7. 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; the CSI report is transmitted via a PUCCH resource; The PUCCH resource is determined based on an assumption that each CSI sub-report in the CSI report indicates rank 1.

8. The terminal of claim 7 , wherein the PUCCH resource is determined based on an uplink control channel (UCI) payload size calculated according to the assumption.

9. The terminal of claim 7, wherein each CSI sub-report corresponds to an antenna port number or a power offset value.

10. The terminal of claim 7 , wherein the CSI report includes Part 2 CSI.

11. The terminal of claim 7, wherein the number of physical resource blocks (PRBs) for the PUCCH resource is determined based on the assumption.

12. 8. The terminal of claim 7, wherein, based on the CSI report including a CSI sub-report, even if the number of CSI reports is one, the PUCCH resource is determined as the PUCCH resource for the multiple CSI reports among the PUCCH resource for a single CSI report and the PUCCH resource for multiple CSI reports.

13. 1. An apparatus for a terminal, comprising: at least one processor; and at least one computer memory operatively connected to the at least one processor and that, when executed, causes the 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; the CSI report is transmitted via a PUCCH resource; The apparatus, wherein the PUCCH resource is determined based on an assumption that each CSI sub-report in the CSI report has a rank of 1.

14. A computer-readable non-volatile storage medium, at least one computer program that causes 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; the CSI report is transmitted via a PUCCH resource; The PUCCH resource is determined based on an assumption that each CSI sub-report in the CSI report has a rank of 1.

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