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

Abstract

A method and device for transmitting and receiving signals in a wireless communication system disclosed in the present specification transmit and receive a CSI report. A CSI report configuration for the CSI report includes a plurality of sub-configurations. If DCI for triggering the CSI report does not include any information about the sub-configurations, the CSI report includes CSI information about all of the sub-configurations.

Description

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

[0001] The present invention relates to a method and apparatus used in a wireless communication system.

[0002] Wireless communication systems are widely deployed to provide various types of communication services, such as voice and data. Typically, wireless communication systems are multiple access systems that support communication with multiple users by sharing available system resources (e.g., bandwidth, transmission power). Examples of multiple access systems include Code Division Multiple Access (CDMA), Frequency Division Multiple Access (FDMA), Time Division Multiple Access (TDMA), Orthogonal Frequency Division Multiple Access (OFDMA), and Single Carrier Frequency Division Multiple Access (SC-FDMA).

[0003] The technical problem to be achieved by the present invention is to provide a signal transmission and reception method and a device therefor for efficiently transmitting and receiving a reference signal and a measurement report in a wireless communication system.

[0004] The technical problems of the present invention are not limited to the technical problems described above, and other technical problems can be inferred from the embodiments of the present invention.

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

[0006] In one aspect of the present invention, a method for transmitting and receiving a signal by a terminal in a wireless communication system is provided, comprising: receiving a channel state information (CSI) reporting configuration; receiving downlink control information (DCI) for triggering a CSI report; receiving a CSI-reference signal (CSI-RS) on a CSI-RS resource based on the CSI reporting configuration; and transmitting a CSI report triggered by the DCI based on a measurement result for the CSI-RS; wherein the CSI reporting configuration includes sub-configurations, and based on the DCI including information corresponding to one or more of the sub-configurations, the CSI report includes CSI information for the one or more sub-configurations, and based on the DCI not including information corresponding to any of the sub-configurations, the CSI report includes CSI information for all of the sub-configurations.

[0007] In another aspect of the present invention, a method for transmitting and receiving a signal by a base station in a wireless communication system comprises the steps of: transmitting a channel state information (CSI) reporting configuration; transmitting downlink control information (DCI) for triggering a CSI report; transmitting a CSI-reference signal (CSI-RS) on a CSI-RS resource based on the CSI reporting configuration; and receiving a CSI report triggered by the DCI based on a measurement result for the CSI-RS; wherein the CSI reporting configuration includes sub-configurations, and based on the DCI including information corresponding to one or more of the sub-configurations, the CSI report includes CSI information for the one or more sub-configurations, and based on the DCI not including information corresponding to any of the sub-configurations, the CSI report includes CSI information for all of the sub-configurations.

[0008] As another aspect of the present invention, a device, a processor and a storage medium for performing one of the signal transmission and reception methods are provided.

[0009] The above devices may include at least a terminal, a network, and an autonomous vehicle capable of communicating with other autonomous vehicles other than the above devices.

[0010] The above-described aspects of the present invention are only some of the preferred embodiments of the present invention, and various embodiments reflecting the technical features of the present invention can be derived and understood by a person having ordinary skill in the art based on the detailed description of the present invention described below.

[0011] According to one embodiment of the present invention, when a reference signal and a measurement report are transmitted and received between communication devices, there is an advantage in that more efficient signal transmission and reception can be performed through operations differentiated from the conventional invention.

[0012] The technical effects of the present invention are not limited to the technical effects described above, and other technical effects can be inferred from the embodiments of the present invention.

[0013] Figure 1 illustrates the structure of a radio frame.

[0014] Figure 2 illustrates a resource grid of slots.

[0015] Figure 3 shows an example of physical channels being mapped within a slot.

[0016] Figure 4 illustrates a signal transmission and reception method according to an embodiment of the present invention.

[0017] Figures 5 to 8 illustrate devices according to embodiments of the present invention.

[0018] The following technologies can be used in various wireless access systems, such as CDMA, FDMA, TDMA, OFDMA, and SC-FDMA. CDMA can be implemented using wireless technologies such as UTRA (Universal Terrestrial Radio Access) or CDMA2000. TDMA can be implemented using wireless technologies such as GSM (Global System for Mobile communications) / GPRS (General Packet Radio Service) / EDGE (Enhanced Data Rates for GSM Evolution). OFDMA can be implemented using wireless technologies such as IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802-20, and E-UTRA (Evolved UTRA). UTRA is a part of UMTS (Universal Mobile Telecommunications System). 3GPP (3rd Generation Partnership Project) LTE (Long Term Evolution) is a part of E-UMTS (Evolved UMTS) that uses E-UTRA, and LTE-A (Advanced) / LTE-A pro is an evolved version of 3GPP LTE. 3GPP NR (New Radio or New Radio Access Technology) is an evolved version of 3GPP LTE / LTE-A / LTE-A pro.

[0019] For clarity, the description is based on a 3GPP communication system (e.g., LTE, NR), but the technical idea of ​​the present invention is not limited thereto. LTE refers to technology after 3GPP TS 36.xxx Release 8. Specifically, LTE technology after 3GPP TS 36.xxx Release 10 is referred to as LTE-A, and LTE technology after 3GPP TS 36.xxx Release 13 is referred to as LTE-A pro. 3GPP NR refers to technology after TS 38.xxx Release 15. LTE / NR may be referred to as a 3GPP system. "xxx" refers to a standard document detail number. LTE / NR may be collectively referred to as a 3GPP system. For background technology, terms, abbreviations, etc. used in the description of the present invention, reference may be made to matters described in standard documents published prior to the present invention. For example, reference may be made to the following documents.

[0020] 3GPP NR

[0021] - 38.211: Physical channels and modulation

[0022] - 38.212: Multiplexing and channel coding

[0023] - 38.213: Physical layer procedures for control

[0024] - 38.214: Physical layer procedures for data

[0025] - 38.300: NR and NG-RAN Overall Description

[0026] - 38.331: Radio Resource Control (RRC) protocol specification

[0027] Figure 1 illustrates the structure of a radio frame used in NR.

[0028] In NR, uplink (UL) and downlink (DL) transmissions are structured as frames. A radio frame is 10ms long and is defined as two 5ms half-frames (HF). Each half-frame is defined as five 1ms 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). When normal CP is used, each slot contains 14 symbols. When extended CP is used, each slot contains 12 symbols. Here, the symbols can include OFDM symbols (or CP-OFDM symbols), SC-FDMA symbols (or DFT-s-OFDM symbols).

[0029] Table 1 illustrates that when CP is normally used, the number of symbols per slot, the number of slots per frame, and the number of slots per subframe vary depending on the SCS.

[0030] [Table 1]

[0031]

[0032] Table 2 illustrates that when extended CP is used, the number of symbols per slot, the number of slots per frame, and the number of slots per subframe vary depending on the SCS.

[0033] [Table 2]

[0034]

[0035] In an NR system, OFDM(A) numerology (e.g., SCS, CP length, etc.) may be set differently between multiple cells that are merged into a single user equipment (UE). Accordingly, the (absolute time) interval of a time resource (e.g., SF, slot, or TTI) (conveniently referred to as a TU (Time Unit)) consisting of the same number of symbols may be set differently between the merged cells.

[0036] NR supports multiple Orthogonal Frequency Division Multiplexing (OFDM) numerologies (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 can support dense urban areas, lower latency, and wider carrier bandwidth.

[0037] The NR frequency band is defined by two types of frequency ranges (FR) (FR1 / FR2). FR1 / FR2 can be configured as shown in Table 3 below. FR2 can also refer to millimeter wave (mmW).

[0038] [Table 3]

[0039]

[0040] Figure 2 illustrates the slot structure of an NR frame.

[0041] A slot contains multiple symbols in the time domain. For example, for a normal CP, one slot contains 14 symbols, and for 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 (simply, interlaces) can be defined in the frequency domain. An interlace m ∈ {0, 1, ..., M-1} can be composed of (common) RBs {m, M+m, 2M+m, 3M+m, ...}. M represents the number of interlaces. A BWP (Bandwidth Part) is defined as multiple consecutive RBs (e.g., physical RBs, PRBs) in the frequency domain, and can correspond to one OFDM numerology (e.g., SCS(u), CP length, etc.). A carrier can contain up to N (e.g., 5) BWPs. Data communication is performed through activated BWPs, and only one BWP can be activated per terminal within a single cell / carrier. Each element in the resource grid is referred to as a Resource Element (RE), to which a single modulation symbol can be mapped.

[0042] In a wireless communication system, a terminal receives information from a base station via the downlink (DL), and the terminal transmits information to the base station via the uplink (UL). The information transmitted and received between the base station and the terminal includes data and various control information, and various physical channels / signals exist depending on the type / purpose of the information they transmit and receive. A physical channel corresponds to a set of resource elements (REs) that carry information derived from a higher layer. A physical signal corresponds to a set of resource elements (REs) used by the physical layer (PHY), but does not carry information derived from a higher layer. The higher layers include the Medium Access Control (MAC) layer, the Radio Link Control (RLC) layer, the Packet Data Convergence Protocol (PDCP) layer, and the Radio Resource Control (RRC) layer.

[0043] DL physical channels include Physical Broadcast Channel (PBCH), Physical Downlink Shared Channel (PDSCH), and Physical Downlink Control Channel (PDCCH). DL physical signals include DL Reference Signal (RS), Primary Synchronization Signal (PSS), and Secondary Synchronization Signal (SSS). DL RS includes Demodulation RS (DM-RS), Phase-tracking RS (PT-RS), and Channel-state information RS (CSI-RS). UL physical channels include Physical Random Access Channel (PRACH), Physical Uplink Shared Channel (PUSCH), and Physical Uplink Control Channel (PUCCH). UL physical signals include UL RS. UL RS includes DM-RS, PT-RS, and Sounding RS (SRS).

[0044] Figure 3 shows an example of physical channels being mapped within a slot.

[0045] A DL control channel, DL or UL data, and UL control channel can all be included in a single slot. For example, the first N symbols in a slot can be used to transmit a DL control channel (hereinafter, DL control region), and the last M symbols in the slot can be used to transmit a UL control channel (hereinafter, UL control region). N and M are each integers greater than or equal to 0. A resource region (hereinafter, data region) between the DL control region and the UL control region can be used for DL ​​data transmission or UL data transmission. A time gap for DL-to-UL or UL-to-DL switching can exist between the control region and the data region. A PDCCH can be transmitted in the DL control region, and a PDSCH can be transmitted in the DL data region. Some symbols at the time of switching from DL to UL within a slot can be used as a time gap.

[0046] In the present invention, the base station may be, for example, a gNodeB.

[0047] Uplink (UL) physical channel / signal

[0048] (1) PUSCH

[0049] The PUSCH carries uplink data (e.g., UL-SCH TB) and / or uplink control information (UCI), and is transmitted based on a CP-OFDM (Cyclic Prefix-Orthogonal Frequency Division Multiplexing) waveform or a DFT-s-OFDM (Discrete Fourier Transform-spread-OFDM) waveform. When the PUSCH is transmitted based on a DFT-s-OFDM waveform, the UE transmits the PUSCH by applying transform precoding. For example, when transform precoding is disabled (e.g., transform precoding is disabled), the UE transmits the PUSCH based on the CP-OFDM waveform, and when transform precoding is enabled (e.g., transform precoding is enabled), the UE can transmit the PUSCH based on the CP-OFDM waveform or the DFT-s-OFDM waveform. PUSCH can be dynamically scheduled by 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 PDCCH, but in CS, PUSCH transmission is not accompanied by PDCCH. CS includes Type-1 Configured Grant (CG) PUSCH transmission and Type-2 CG PUSCH transmission. In Type-1 CG, all parameters for PUSCH transmission are signaled by higher layers. In Type-2 CG, some of the parameters for PUSCH transmission are signaled by higher layers, and the rest are signaled by PDCCH. Basically, in CS, PUSCH transmission is not accompanied by PDCCH.

[0050] (2) PUCCH

[0051] PUCCH carries Uplink Control Information (UCI). UCI includes:

[0052] - SR (Scheduling Request): Information used to request UL-SCH resources.

[0053] - HARQ-ACK (Hybrid Automatic Repeat and reQuest Acknowledgement): This is a reception response signal for DL ​​signals (e.g., PDSCH, SPS release PDCCH). The HARQ-ACK response may include positive ACK (simply ACK), negative ACK (NACK), Discontinuous Transmission (DTX), or NACK / DTX. HARQ-ACK can be used interchangeably with A / N, ACK / NACK, HARQ-ACK / NACK, etc. HARQ-ACK can be generated on a TB basis / CBG basis.

[0054] - CSI (Channel Status Information): Feedback information for the DL channel. CSI includes the Channel Quality Indicator (CQI), Rank Indicator (RI), Precoding Matrix Indicator (PMI), and Precoding Type Indicator (PTI).

[0055] Downlink (DL) physical channel / signal

[0056] (1) PDSCH

[0057] 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. A CW includes one or more code blocks (CBs). One or more CBs can be grouped into a single CB group (CBBG). Depending on the cell configuration, a 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 is precoded, mapped to resources along with the DMRS, and transmitted through the corresponding antenna port. PDSCH can be dynamically scheduled by 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, PDSCH transmission is accompanied by PDCCH, whereas in CS, PDSCH transmission is not accompanied by PDCCH. CS includes semi-persistent scheduling (SPS).

[0058] (2) PDCCH

[0059] 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 upper-layer control messages such as the Random Access Response (RAR) transmitted on the PDSCH, transmission power control commands, and information regarding the activation / release of Configured Scheduling (SPS / CS). Various DCI formats are provided depending on the information contained within the DCI.

[0060] 1. Configuration of CSI content for multi-CSI report

[0061] The above-mentioned contents can be applied in combination with the proposed methods described below, or can be supplemented to clarify the technical characteristics of the proposed methods.

[0062] In addition, the methods described below can be equally applied to the NR system (licensed band) or shared spectrum described above, and the technical ideas proposed in this specification can be modified or replaced to fit the terms, expressions, structures, etc. defined in each system so that they can be implemented in the corresponding systems.

[0063] Energy conservation at base stations is a key consideration in wireless communication systems, including 3GPP, as it can contribute to building eco-friendly networks by reducing carbon emissions and reducing operational expenditures (OPEX) for telecommunications operators. In particular, the introduction of 5G communications will require higher transmission rates, necessitating base stations to be equipped with more antennas and provide services over wider bandwidths and frequency bands. Consequently, recent studies have shown that base station energy costs have reached up to 20% of total OPEX. This increased interest in base station energy conservation led to the approval of a new study item, "Study on Network Energy Savings," in 3GPP NR Release 18.

[0064] Specifically, in order to improve the energy saving capability of the base station from the perspective of transmission and reception, the following enhancement techniques are being considered.

[0065] - 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 UE, and potential UE assistance information.

[0066] In this specification, we propose a configuration of multiple CSI information when multiple CSI information is transmitted and received in a single CSI report according to the number of APs or power offset adjustment for base station energy saving.

[0067] In this specification, we mainly consider a scenario in which a base station receives CSI reports for multiple APs (antenna ports) and / or multiple power offsets at once, and adjusts the number of APs to use when transmitting a downlink signal / channel to a terminal or adjusts the transmission power, thereby obtaining a network energy saving (NES) benefit. The base station can reduce the number of APs or reduce the transmission power based on the reported CSI. Therefore, an energy saving (ES) benefit can be obtained by adjusting unnecessary parts of the antenna element (AE) and / or the transmission power. For example, the base station configures a terminal to transmit CSI information assuming multiple APs (e.g., 64 APs and 32 APs) and / or CSI information for multiple CSI-RS to PDSCH power offset values ​​(e.g., -3 dB, 0 dB) in a single CSI report for each of a single CSI-RS resource or multiple CSI-RS resources in a CSI-RS resource set. Furthermore, power consumption of the base station can be reduced by determining the optimal number of APs and PDSCH transmission power / MCS based on the information in this CSI report. Therefore, in this specification, a method for configuring CSI-RS resources and a CSI-RS resource set for reporting on multiple APs and / or multiple power offset values ​​is proposed. In addition, a method for configuring a CSI report when CSI information on multiple APs and / or multiple power offset values ​​is transmitted through a single CSI report is proposed.

[0068] The power offset according to the conventional NR system may mean 'powerControlOffset', an RRC parameter that indicates the power offset value between the PDSCH RE and the NZP (non-zero power) CSI-RS RE (resource element) (see Table 4).

[0069] Hereinafter, in the present invention, NAP is an abbreviation for 'number of antenna ports', and PCO is an abbreviation for 'power control offset' (i.e., powerControlOffset). In this case, PCO may mean 'powerControlOffset', which is an RRC parameter for a power offset value between a PDSCH RE and a NZP (non-zero power) CSI-RS RE (resource element). Alternatively, it may mean 'powerControlOffsetSS', which is an RRC parameter for a ratio between an SS / PBCH (synchronization signal / physical broadcast channel) block and an NZP CSI-RS EPRE (energy per resource element). In the former case, the PDSCH power may be adjusted based on the CSI-RS power, and in the latter case, the CSI-RS power may be adjusted based on the SSB power.

[0070] The UE can know the SSB (synchronization signal / physical broadcast channel block) transmission power of the serving base station through the RRC parameter ss-PBCH-BlockPower. In addition, the UE can know 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 transmission power of the PDSCH or adjust the MCS based on the CQI in the CSI report of the UE. When the UE receives the CSI-RS transmitted by 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 change by the offset value compared to the power of the CSI-RS actually received. The base station can adjust the power and MCS of the PDSCH appropriately based on the reported information, or can schedule the PDSCH using the existing settings without adjusting them (up to gNB implementation). If CSI information corresponding to multiple power offset values ​​and / or the number of APs can be configured and / or instructed to be transmitted through a single CSI report, the base station does not need to perform an RRC reconfiguration with relatively large delay or receive multiple CSI reports for each of the multiple power offset values ​​and / or the multiple APs in order to change the power offset values ​​and / or the number of APs within a CSI-RS resource or a set of CSI-RS resources. Instead, the base station receives CSI reports for multiple power offset values ​​and / or APs at once, and quickly utilizes the received CSI reports for downlink power adjustment and / or AP number adjustment.Through this, energy saving effects of the base station can be achieved. For convenience, this specification mainly describes a method for configuring CSI-RS resources and CSI-RS resource sets for multiple power offset values, and a method for configuring / reporting CSI for multiple power offset values. However, this can also be applied to a method for configuring CSI-RS resources and CSI-RS resource sets for the number of APs, and a method for configuring / reporting CSI information for the number of APs. In addition, CSI information for multiple power offset values ​​and APs can all be transmitted together in a single CSI report.

[0071] Meanwhile, a base station can turn on or off certain spatial elements for the purpose of NES, or adjust the power value for a downlink signal / channel. In this specification, spatial elements may mean antenna ports, active transceiver chains, panels, or transmission and reception points (TRPs). In order to dynamically apply various NES technologies in the spatial domain and power domain, the base station can link CSI-RS resource sets having different antenna ports for a single CSI reporting configuration (e.g., CSI-ReportConfig), or link multiple power offsets (e.g., powerControlOffset parameter, which is a power offset value between PDSCH and CSI-RS, powerControlOffsetSS parameter, which is a power offset value between SSB and CSI-RS, etc.).

[0072] Meanwhile, at least one CSI framework may be introduced among the following methods.

[0073] - Method#1: Multiple CSI-RS resource sets are linked for one CMR (abbreviation for channel measurement resource, which can be configured by the resourcesForChannelMeasurement parameter) or one IMR (abbreviation for interference measurement resource, which can be configured by the csi-IM-ResourcesForInterference or nzp-CSI-RS-ResourcesForInterference parameters) within the CSI-ReportConfig configuration. 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 can be configured with 16 APs, and the CSI-RS resources belonging to CSI-RS resource set #2 can be configured with 8 APs.

[0074] - Method#2: When there is a CSI-RS resource set linked to a CMR or an IMR in the CSI-ReportConfig configuration, the set is composed of one or more CSI-RS resources with different properties such as the number of APs and / or power offsets. For example, for CSI-RS resource set#1 configured as CMR, CSI-RS resource#1 belonging to CSI-RS resource set#1 may be configured with 16 Aps (or the power offset#1 value may be set), and CSI-RS resource#2 belonging to the same set may be configured with 8 APs (or the power offset#2 value may be set).

[0075] - Method#3: When there is a CSI-RS resource set linked to a CMR or an IMR in the CSI-ReportConfig configuration, some or all of the CSI-RS resource(s) within the set can be configured with multiple AP numbers and / or power offsets. For example, for the CSI-RS resource set #1 configured as CMR, if the CSI-RS resource #1 belonging to the CSI-RS resource set #1 is configured with a maximum of 16 APs, CSI reporting utilizing some of the AP(s) can be configured. Alternatively, multiple power offset values ​​can be configured for the CSI-RS resource #2 belonging to the same set, and CSI reporting utilizing all or part of the power offsets can be configured.

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

[0077] - Option#1: CSIs considering multiple AP counts and / or multiple power offset values ​​set in a single CSI report can all be included in a single CSI report. Alternatively, through the configuration / instruction of the base station, CSIs considering multiple AP counts and / or multiple power offsets (in this case, the AP counts and / or power offsets set / instructed by the base station may be part of the AP counts and / or power offset values ​​set in the corresponding CSI report) can be included in a single CSI report.

[0078] - Option#2: Even if multiple AP counts and / or multiple power offset values ​​are set in a single CSI report, CSIs considering only a single AP count and / or a single power offset can be included in a single CSI report through the base station's configuration / instruction.

[0079] - Option#3: Even if multiple AP counts and / or multiple power offset values ​​are set in a single CSI report, CSIs considering some AP counts and / or some power offsets can be included in a single CSI report through the terminal's judgment / decision (using criteria set in advance by the base station or pre-defined).

[0080] There can be L (>1) sub-configurations configured within a CSI-ReportConfig. Each sub-configuration can correspond to one spatial domain adaptation pattern or one power domain adaptation pattern.

[0081] Here, the spatial domain adaptation pattern can 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, because if some antenna elements corresponding to one antenna port are turned off, it can affect the CSI-RS power value). When Method#2 is applied, when the number of APs (or power value P1) of A1 is set for the CSI-RS index#n1 belonging to the resource set, and the number of APs (or power value P2) of A2 is set for the CSI-RS index#n2 belonging to the same set, the sub-configuration index#s1 is linked to the CSI-RS#n1, and the sub-configuration index#s2 is linked to the CSI-RS index#n2, so that the spatial domain adaptation pattern can be set differently for each sub-configuration. When Method#3 is applied, when the number of APs A1 (or power value P1 / P2) is set for CSI-RS index#n1 belonging to a resource set, the number of APs A1 (or power value P1) is linked to sub-setting index#s1, and the number of APs A2 (or power value P2) constituting CSI-RS index#n1 is linked to sub-setting index#s2 (A1 > A2), so that a spatial domain adaptation pattern can be set differently for each sub-setting.

[0082] In addition, the power domain adaptation pattern may mean that the power offset value (e.g., the power offset value determined by the powerControlOffset parameter, which is the power offset value between PDSCH and CSI-RS, the powerControlOffsetSS parameter, which is the power offset value between SSS and CSI-RS, etc.) changes. When Method#2 is applied, when the power value P1 is set to the CSI-RS index#n1 belonging to the resource set and the power value P2 is set to the CSI-RS index#n2 belonging to the same set, the sub-setting index#s1 is linked to the CSI-RS index#n1, and the sub-setting index#s2 is linked to the CSI-RS index#n2, so that the power domain adaptation pattern can be set differently for each sub-setting. When Method#3 is applied, when the power value P1 (power value P2) is set to the CSI-RS index#n1 belonging to the resource set, the power value P1 is linked to the sub-setting index#s1, and the power value P2 is linked to the sub-setting index#s2, so that a different power domain adaptation pattern can be set for each sub-setting. The terminal can feed back to the base station a CSI report composed of CSI corresponding to N (N value 1 or more and L or less) sub-settings among the L sub-settings (by using one of the methods of Option#1 / 2 / 3 above).

[0083] In the present invention, the fact that the base station operates in the NES mode for ES may mean, for example, that the base station sets multiple OFF periods (DTX periods of the base station) in advance to turn off transmission of a specific DL signal during a specific time period, and dynamically indicates one of the OFF periods to indicate that the corresponding DL signal will not be transmitted during the predefined time period, thereby reducing power consumption of the base station and the terminal. In addition, the fact that the base station operates in the NES mode for ES may mean that operations such as BWP switching and dynamic RB adaptation are performed not only in the time domain but also in the frequency domain. In addition, the fact that the base station operates in the NES mode for ES may also mean an operation mode in which, when a specific receiving antenna port of the base station is semi-statically or dynamically turned off in the spatial domain, the base station does not transmit and / or receive through the corresponding antenna port, thereby reducing power consumption of the base station and the terminal.

[0084] [Method #1] When SP-CSI reporting or AP-CSI reporting is triggered through DCI, if there is no sub-configuration index corresponding to the trigger state indicated by DCI, a method of reporting all CSI information corresponding to L (>1) sub-configurations set in the CSI-ReportConfig setting.

[0085] There are three types of CSI reporting methods: P(periodic)-CSI reporting, SP(semi-persistent)-CSI reporting, and AP(aperiodic)-CSI reporting. P-CSI and SP-CSI reporting via PUCCH are transmitted on pre-configured periods and resources. SP-CSI and AP-CSI reporting via PUSCH are transmitted aperiodicly based on DCI, using pre-allocated resources or resources indicated by DCI.

[0086] Among these, in the case of SP-CSI reporting and AP-CSI reporting through PUSCH, triggering is performed through the AP-CSI trigger state field in DCI format 0_1, DCI format 0_2, or DCI format 0_3. Through this field, a specific aperiodic trigger state index set in CSI-AperiodicTriggerStateList or a codepoint defined in MAC CE is indicated. The bit length of this field is determined through the reportTriggerSize of the RRC parameter CSI-MeasConfig. When the bit length is sufficient, the mapping relationship for each codepoint in the DCI field can be set through DCI alone like the former, and when the bit length is not sufficient, the mapping relationship for each codepoint in the DCI field can be set through MAC CE like the latter. At this time, a link relationship between an index indicated through the AP-CSI trigger state field in DCI format 0_1, 0_2, or 0_3 and a sub-configuration index (or sub-configuration group index) corresponding to the NAP and / or PCO values ​​set by CSI-ReportConfig can be established in advance. When a specific index is indicated through the AP-CSI trigger state field, CSI information corresponding to the linked NAP and / or PCO values ​​can be included in the AP-CSI report and transmitted.

[0087] The base station can receive multi-CSI information for some N (>1) of the L sub-configurations configured in the CSI-ReportConfig configuration. Meanwhile, the base station may need to receive a report including CSI information for all L sub-configurations, depending on the case. In this case, even if a specific trigger state is configured for multi-CSI reporting, the sub-configuration index to be linked may not be configured (intentionally). When SP-CSI reporting or AP-CSI reporting is triggered through DCI, if there is no sub-configuration index corresponding to the trigger state indicated by the DCI, the terminal can report all CSI information corresponding to L (>1) sub-configurations configured in the CSI-ReportConfig configuration.

[0088] [Method #2] How to calculate the bitwidth of the CRI and RI fields when multi-CSI information corresponding to multiple sub-settings is transmitted through a single CSI report.

[0089] Method #2 may include the following methods:

[0090] (1) When the number of CSI-RS resources corresponding to sub-setting index n is X_n, a method of calculating the CRI (CSI-RS resource index) field width by adding all floor{log2(X_n)} values ​​for each sub-setting. At this time, index n can be triggered / activated sub-setting indices or configured sub-setting indices.

[0091] (2) If the number of CSI-RS resources belonging to each sub-setting is the same and the CRI is not different for each sub-setting during CRI feedback, which is a common CSI quantity, a method of calculating the bit width of the CRI field by considering only a single sub-setting.

[0092] Below is a detailed explanation of (1) and (2) of Method #2.

[0093] According to 3GPP TS 38.212, the bit width of the CRI field in a CSI report is ceil(log2(K S )) is calculated, where K S is the number of CSI-RS resources. The base station can configure L(>1) sub-reports in the CSI-ReportConfig configuration for multi-CSI reporting. If N(>1) sub-configurations are configured / instructed to be included in one CSI report, the terminal can configure K S The value can be calculated by replacing the number of CSI-RSs within the sub-setting (or the number of CSI-RSs associated with the corresponding sub-setting).

[0094] That is, the bit width of the CRI field can be calculated by considering the number of multiple sub-settings corresponding to one CSI reporting configuration. Specifically, when the number of CSI-RS resources corresponding to sub-setting index n is X_n, the bit width of the CRI field can be calculated by adding all floor{log2(X_n)} values. Here, the index n may be a sub-setting index that is activated, triggered, or configured to be included in multi-CSI reporting. If the number of CSI-RS resources belonging to each sub-setting is the same, or the CRI of each sub-setting is configured to be commonly reported, or a rule is defined in advance so that the CRI of each sub-setting is commonly reported, or the CRI of each sub-setting is not different in the CRI feedback and is therefore a common CSI quantity, the bit width of the CRI field can be calculated by considering only a single sub-setting configuration without the need to calculate the CRI bit width for each of the multiple sub-settings.

[0095] The above CRI field bit width calculation method can be similarly applied to the bit width of the RI field. When the codebook type (codebookType) is Type I, the RI bit width can be calculated as min{2, ceil{log2(n_RI)}}, and when the codebook type is Type II, the RI bit width can be calculated as min{2, ceil{log2(n_RI)}}. Here, n_RI is the value of the rank indicator allowed for each codebook type. Therefore, the bit width of the RI field can also be calculated by considering the number of multiple sub-configurations corresponding to one CSI reporting configuration. Specifically, when the number of allowed indicator values ​​corresponding to a sub-configuration index n is Y_n, for Type I it can be calculated by adding the min{2, floor{log2(Y_n)}} values ​​for all sub-configurations, and for Type II it can be calculated by adding the min{1, floor{log2(Y_n)}} values ​​for all sub-configurations. Similarly, if the number of CSI-RS resources belonging to each sub-configuration is the same and the RI is not different for each sub-configuration, which is a common CSI quantity, the bit width of the RI field may be calculated by considering only a single sub-configuration.

[0096] Meanwhile, when CSI information corresponding to N (>1) sub-settings is configured for a single CSI report based on CSI-ReportConfig, the configuration methods of CSI Part 1 and Part 2 of the legacy CSI report when the existing N=1 CSI report is configured need to be enhanced or modified. The following are approaches to CSI mapping, priority, and omission rules for CSI with multiple sub-settings discussed in the RAN1#113 meeting.

[0097] ● Approach 1: CSI mapping order for CSI Part 1 or Part 2 and CSI omission / priority rule are performed per CSI report.

[0098] - CSI Part 1: CSI quantities (such as CRI, RI and CQI when applicable) corresponding to all of N sub-configurations are multiplexed into a single CSI Part 1.

[0099] ○ The mapping order is determined as follows: (mapping order is determined as)

[0100] ■ Example: CSI quantity first and sub-configuration index second, or sub-configuration index first and CSI quantity second

[0101] - CSI Part 2: Two priority reporting levels can be allocated to a CSI report.

[0102] ○ Each priority reporting level is determined as follows:

[0103] ■ Example: For the first priority reporting level, even subbands of all N sub-configurations are determined, and for the second priority reporting level, odd subbands of all N sub-configurations are determined (e.g., even subbands of all N sub-configurations for the priority reporting level and odd subbands of all N sub-configurations for the second priority reporting level)

[0104] ○ For CSI omission, legacy mechanisms can be reused.

[0105] Approach 1 is a method of applying the CSI mapping order and CSI priority and omission rules of CSI Parts 1 and 2 per CSI report unit, similar to the conventional CSI report. When CSIs corresponding to N sub-configurations are 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 configure CSI Report #n. In addition, CSI Part 2 is also configured, similar to the conventional method, with the even sub-band CSI corresponding to all N sub-configurations within the same CSI report #n being configured with the first priority level, the even sub-band CSI being configured with the second priority, and so on. If the amount of resources allocated to the CSI report is not sufficient to include all CSI, the blocks with lower priorities, i.e., the odd sub-band CSI, are omitted first.

[0106] ● Approach 2: CSI mapping order for CSI Part 1 or Part 2 and CSI omission / priority rule are performed per sub-configuration.

[0107] - CSI Part 1: CSI quantities (such as CRI, RI and CQI when applicable) corresponding to each sub-configuration are separately generated and then concatenated into a single bit sequence for CSI part 1 for the CSI report configuration.

[0108] - CSI part 2: Two priority reporting levels can be allocated to each sub-configuration, i.e., 2 x N priority reporting levels in total.

[0109] ○ For CSI omission / priority rule, sub-configuration index needs to be additionally considered and Pri_iCSI(y,k,c,s) in document 214 can be modified as follows: (For CSI omission / priority rule, sub-configuration index needs to be additionally considered and Pri iCSI (y,k,c,s) in 214 specification can be modified, as followsJ

[0110] ■ Pri iCSI (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 + q max s+q

[0111] where q is the sub-configuration index and q_max is the maximum value of the sub-configuration index within the CSI reporting configuration. max is the maximum number of sub-configuration indexes in a CSI report configuration).

[0112] For Approach 2 (per sub-configuration), the CSI field mapping order and CSI omission / priority rules of CSI Parts 1 and 2 are applied on a per-sub-configuration basis. When CSI information corresponding to N sub-configurations are configured within a CSI report, the N pieces of CSI information generated separately for each sub-configuration CSI quantities (e.g., CRI, RI, CQI) are concatenated into a single bit sequence and multiplexed into CSI Part 1. In addition, for CSI Part 2, a priority reporting level can be applied per sub-configuration, so that the existing CSI omission / priority rules can be applied to the CSI Part 2 information corresponding to each sub-configuration as 2xN. This means that priorities can be assigned between sub-configurations by reflecting the sub-configuration index in the formula Pri_iCSI(y,k,c,s) for calculating priorities per CSI report in TS 38.214. Accordingly, omission of CSI information units on a sub-configuration basis is applicable. In Approach 1 (per CSI report), even and odd sub-band CSI information blocks are composed of two blocks corresponding to all N sub-configurations triggered / activated to be included in the CSI report. On the other hand, in Approach 2 (per sub-configuration), even and odd sub-band CSI information per sub-configuration are each composed of one block. Therefore, a total of 2xN blocks are composed, and omission according to priority per sub-configuration can also be applied on a block-by-block basis.

[0113] Approach 3:

[0114] - CSI Part 1: Contains CSI quantities (such as CRI, RI and CQI when applicable) associated with a reference sub-configuration.

[0115] ○ A reference sub-configuration, for example, which is the sub-configuration with the largest number of antenna ports based on the corresponding (N1, N2) values.

[0116] - CSI Part 2: Contains remaining CSI quantities for the reference sub-configuration (e.g., PMI, LI), and (N-1) CSIs for the remaining sub-configurations.

[0117] [Method #3] How to configure CSI Part 1 when multi-CSI information corresponding to multiple sub-settings is transmitted and received through a single CSI report.

[0118] According to the existing 3GPP TS 38.212 Table 6.3.1.1.2-9, in the case of a single CSI report, the configuration order of the CSI fields in the CSI Part 1 is 'CRI - RI - WB (wideband) CQI for the first TB - SB (subband) differential CQI for the first TB'. In the case of a multi-CSI report, which is one CSI report for multiple sub-configurations, since 'CRI - RI - WB CQI for the first TB - SB differential CQI for the first TB' information exists for each sub-configuration, a new CSI field configuration method may be required when the CSI report is configured.

[0119] In the first method, CSI fields can be sequentially configured for each triggered / activated sub-setting to be included in the CSI report. This method can be expressed in a form of multiple iterations of the existing single-CSI report CSI field configuration method described above, where all CSI fields for one sub-setting are mapped first, and then the CSI fields for the next sub-setting are mapped. For example, if multi-CSI reporting is triggered / enabled to include CSI information corresponding to sub-settings #1, #2, and #3, 'CRI - RI - WB CQI for the first TB - SB differential CQI for the first TB for the first TB' of sub-setting #1, then 'CRI - RI - WB CQI for the first TB - SB differential CQI for the first TB' of sub-setting #2, and then finally 'CRI - RI - WB CQI for the first TB - SB differential CQI for the first TB' of sub-setting #3 are sequentially mapped. At this time, which CSI field corresponding to which sub-setting index is mapped first can be configured / defined in advance. Alternatively, the CSI fields can be mapped in ascending order from the lowest index or in descending order from the highest index.

[0120] In a second method, the CSI field can be configured by gathering the same CSI fields for each sub-setting that is triggered / activated to be included in the CSI report. In this method, the CSI information of each sub-setting for one CSI field is gathered and mapped all at once, and then the corresponding CSI information for each sub-setting is gathered and mapped for the next CSI field. For example, if a multi-CSI report is triggered / activated to include CSI information corresponding to sub-settings #1, #2, and #3, the CSI information corresponding to each sub-setting is mapped for each CSI field, such as CRI of sub-setting #1 - CRI of sub-setting #2 - CRI of sub-setting #3 - RI of sub-setting #1 - RI of sub-setting #2 - RI of sub-setting #3 - ... - . In this case, the CSI field corresponding to which sub-setting index is mapped first can be set / defined in advance. Alternatively, CSI fields may be mapped in ascending order from the lowest index or descending order from the highest index.

[0121] If the information of a specific CSI field is common to sub-configurations, the CSI field may be included only once or configured in a compressed manner. For example, if the number of CSI-RS resources belonging to each sub-configuration is the same, so that the CRI is the same for each sub-configuration. Alternatively, if the CRI for each sub-configuration is configured to be reported in common or a rule is defined in advance, the CRI field may not be configured for each sub-configuration but may be configured with the CRI value for one sub-configuration. Therefore, in the first method example above, only the CRI field for sub-configuration #1 may exist, and the CRI field may be omitted for subsequent sub-configurations #2 and #3. In the second method example, the CRI field may be configured with the CRI value for sub-configuration #1, and then the CSI field may be configured for each sub-configuration.

[0122] Specifically, in the above approach 3, if the CSI fields (CRI, RI, CQI, etc.) for the reference sub-setting are included in CSI Part 1 and the CSI fields for the remaining sub-settings are all included in CSI Part 2, if the RI values ​​are different for each sub-setting, the amount of CSI information, such as PMI, varies greatly depending on the RI value. Considering this, RI information for each sub-setting must be included in CSI Part 1 to provide information on the configuration of CSI Part 2. However, if the RI values ​​of the multiple sub-settings to be included in the multi-CSI report are all the same, there is no problem in interpreting the CSI information of the remaining sub-settings configured in CSI Part 2 even if CSI Part 1 includes only the RI value corresponding to the reference sub-setting. Therefore, if the RI values ​​of the multiple sub-settings to be included in the multi-CSI report are all the same, there is an advantage in that the CSI payload of CSI Part 1 can be reduced if CSI Part 1 includes only the RI value corresponding to the reference sub-setting. That is, if the RI values ​​are set to be common for each sub-setting or the corresponding constraints are applied, a method may be applied in which the CSI fields (CRI, RI, CQI, etc.) for the reference sub-setting (e.g., the sub-setting with the lowest or highest index) are configured in CSI Part 1 as in the above approach 3, and the CSI fields for the remaining sub-settings are all configured in CSI Part 2.

[0123] [Method #4] CSI field mapping method when configuring CSI part 2 of a multi-CSI report that includes CSI information corresponding to multiple sub-settings.

[0124] According to 3GPP TS 38.212 Table 6.3.1.1.2-10, the CSI field is currently mapped in the order of 'Wideband CQI for the second TB - LI - WB PMI' for wideband. According to 3GPP TS 38.212 Table 6.3.1.1.2-11, the CSI field is mapped in the order of 'Differential CQI for the second TB of all even sub-bands - SB PMI of even sub-bands - Differential CQI for the second TB of all odd sub-bands - SB PMI of odd sub-bands' for sub-band.

[0125] When configuring CSI Part 2 of a multi-CSI report for multiple sub-settings, 1) CSI fields can be sequentially configured for each triggered / activated sub-setting to be included in the CSI report, similar to the CSI Part 1 configuration method of Method #3. This method can be expressed in the form of multiple repetitions of the existing single-CSI report CSI field configuration method described above, where all CSI fields for one sub-setting are mapped and then the CSI fields of the next sub-setting are mapped. Alternatively, 2) CSI fields can be configured by gathering identical CSI fields for each triggered / activated sub-setting to be included in the CSI report. This method gathers the CSI information of each sub-setting for one CSI field and maps it all at once, and then moves on to the next CSI field, where the corresponding CSI information for each sub-setting is gathered and mapped again.

[0126] Meanwhile, if the number N of sub-configurations triggered / activated to be included in a single CSI report is greater than or equal to a threshold, only the CSI information for a specific number of sub-configurations may be included, and CSI Part 2 for the remaining sub-configurations may be omitted. This can reduce the payload size of the CSI report. For example, if N>2, only the sub-band CSI information (CQI / PMI) corresponding to two specific sub-configurations may be included in the CSI report, and all CSI information for the remaining sub-configurations may be omitted. In this case, the two sub-configurations that will constitute the sub-band CSI information may be preset, the two sub-configurations with the smallest / largest indices, or the two sub-configurations with the largest number of APs.

[0127] Alternatively, four blocks may always be configured, two blocks may be configured with CSI information for a reference sub-configuration, and the remaining two blocks may be configured with the remaining sub-configuration(s). For example, when there are three sub-configurations configured to be included in a multi-CSI report, two blocks may be configured with the even and odd sub-band CSI information of the reference sub-configuration (e.g., sub-configuration index #1), one block may be configured by collecting all the even sub-band CSI information of the remaining two sub-configurations (e.g., sub-configuration indexes #2 and #3), and another block may be configured by collecting all the odd-subband CSI information of the remaining two sub-configurations.

[0128] Specifically, when multi-CSI reporting is configured in an Access 2 (per sub-configuration) manner, CSI Part 2 information may be omitted for some sub-configurations (e.g., for sub-configurations to which only power-domain adaptation has been applied or for sub-configurations where the number of APs corresponds to 1).

[0129] Meanwhile, the present invention is not limited to the 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 base station in the present invention may include not only a base station but also a relay node. For example, the base station operations in the present invention may be performed by the base station, but may also be performed by a relay node.

[0130] It is clear that the examples of the proposed methods described above can also be considered as a type of proposed methods, as they can be included as one of the implementation methods of the present invention. In addition, the proposed methods described above can be implemented independently, but can also be implemented in the form of a combination (or merge) of some of the proposed methods. Information on whether the proposed methods are applicable (or information on the rules of the proposed methods) can be defined as a rule so that the base station notifies the terminal or the transmitting terminal notifies the receiving terminal through a predefined signal (e.g., a physical layer signal or a higher layer signal).

[0131] Implementation example

[0132] Figure 4 is a flowchart of a signal transmission and reception method according to embodiments of the present invention.

[0133] Referring to FIG. 4, embodiments of the present invention can be performed by a terminal and can be configured to include a step of receiving a CSI report setting (S501), a step of receiving a DCI for triggering a CSI report (S503), a step of receiving a CSI-RS on a CSI-RS resource based on the CSI report setting (S505), and a step of transmitting a CSI report triggered by the DCI based on a measurement result for the CSI-RS (S507).

[0134] In addition to the operations of FIG. 5, one or more of the operations described in Section 1 may be additionally performed.

[0135] The CSI reporting configuration of FIG. 5 may be an RRC parameter, CSI-ReportConfig. The 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.

[0136] In the conventional NR system, one CSI-RS resource configuration is assigned one CSI report index (e.g., CSI report #n, where n is a positive integer). The base station of the conventional NR system can adjust the PDSCH transmission power based on the CQI in the CSI report of the terminal. When the terminal receives the CSI-RS transmitted by the base station, the terminal calculates and reports the CQI by assuming that the PDSCH is power boosted or power reduced based on the powerControlOffset parameter in the CSI-RS resource configuration. In addition, the base station of the conventional NR system can indicate the number of APs assumed to derive the CQI through the nrofPorts parameter in the CSI-RS-ResourceMapping RRC parameter. When the terminal receives the CSI-RS transmitted by the base station, the terminal assumes the number of APs based on the third parameter in the CSI-RS resource configuration, derives the CQI, and includes the derived CQI in the CSI report and transmits it.

[0137] Referring to the description in Section 1, CSI-ReportConfig may contain L sub-configurations. Each sub-configuration may contain parameters for changing the assumptions on the power offset value and / or the number of APs for one CSI-RS resource configuration.

[0138] Referring to Method #1, a CSI report including CSI information for some of the sub-configurations can be transmitted and received via DCI. The DCI can include information corresponding to one or more of the sub-configurations, and the UE can transmit the CSI information for the corresponding sub-configurations in the CSI report based on the information included in the received DCI. However, if the base station wishes to receive CSI reports for all sub-configurations, the DCI may not include information for any of the sub-configurations. If the information included in the received DCI does not correspond to any of the configured sub-configurations, the UE can transmit the CSI report including CSI information for all sub-configurations.

[0139] Referring to Method #1, a specific field (AP-CSI trigger state field or CSI request field) included in the DCI may indicate a code point. One code point may be mapped to one trigger state, and a trigger state may include information about one or more sub-configurations. The mapping information may be received via RRC signaling or MAC CE.

[0140] Additionally, for a CSI report to include CSI information for all sub-configurations, the trigger state mapped to the codepoint may need to be for multi-CSI reporting. Therefore, the values ​​that can be set as codepoints can be divided into values ​​for which the trigger state is for single-CSI reporting and values ​​for which it is for multi-CSI reporting. Accordingly, if a value indicated by a codepoint is for single-CSI reporting and there is no sub-configuration corresponding to that value, the CSI report may not be performed.

[0141] In cases where the bit length of a specific field is not sufficient, a mapping relationship between a code point and a trigger state is established through MAC CE, so that whether a trigger state is for a single-CSI report or a multi-CSI report can be distinguished based on the mapping relationship established through MAC CE.

[0142] In addition to the operations described with respect to FIG. 4, one or more of the operations described with respect to FIGS. 1 to 3 and / or the operations described in Section 1 may be additionally performed in combination.

[0143] Examples of communication systems to which the present invention is applied

[0144] Although not limited thereto, the various descriptions, functions, procedures, proposals, methods and / or operational flowcharts of the present invention disclosed in this document may be applied to various fields requiring wireless communication / connection (e.g., 5G) between devices.

[0145] Hereinafter, more specific examples will be provided with reference to the drawings. In the drawings / descriptions below, the same drawing reference numerals may represent identical or corresponding hardware blocks, software blocks, or functional blocks, unless otherwise described.

[0146] Figure 5 illustrates a communication system (1) applied to the present invention.

[0147] Referring to FIG. 5, a communication system (1) applied to the present invention includes a wireless device, a base station, and a network. Here, the wireless device refers to a device that performs communication using a wireless access technology (e.g., 5G NR (New RAT), LTE (Long Term Evolution)) and may be referred to as a communication / wireless / 5G device. Although not limited thereto, the wireless device may include a robot (100a), a vehicle (100b-1, 100b-2), an XR (eXtended Reality) device (100c), a hand-held device (100d), a home appliance (100e), an IoT (Internet of Things) device (100f), and an AI device / server (400). For example, the vehicle may include a vehicle equipped with a wireless communication function, an autonomous vehicle, a vehicle capable of performing vehicle-to-vehicle communication, etc. Here, the vehicle may include an Unmanned Aerial Vehicle (UAV) (e.g., a drone). XR devices include AR (Augmented Reality) / VR (Virtual Reality) / MR (Mixed Reality) devices, and can be implemented in the form of HMD (Head-Mounted Device), HUD (Head-Up Display) installed in a vehicle, television, smartphone, computer, wearable device, home appliance, digital signage, vehicle, robot, etc. Mobile devices can include smartphone, smart pad, wearable device (e.g., smart watch, smart glass), computer (e.g., laptop, etc.), etc. Home appliances can include TV, refrigerator, washing machine, etc. IoT devices can include sensors, smart meters, etc. For example, base stations and networks can also be implemented as wireless devices, and a specific wireless device (200a) can act as a base station / network node to other wireless devices.

[0148] Wireless devices (100a to 100f) can be connected to a network (300) via a base station (200). Artificial Intelligence (AI) technology can be applied to the wireless devices (100a to 100f), and the wireless devices (100a to 100f) can be connected to an AI server (400) via the network (300). The network (300) can be configured using a 3G network, a 4G (e.g., LTE) network, a 5G (e.g., NR) network, etc. The wireless devices (100a to 100f) can communicate with each other via the base station (200) / network (300), but can also communicate directly (e.g., sidelink communication) without going through the base station / network. For example, vehicles (100b-1, 100b-2) can communicate directly (e.g., V2V (Vehicle to Vehicle) / V2X (Vehicle to Everything) communication). In addition, IoT devices (e.g., sensors) can communicate directly with other IoT devices (e.g., sensors) or other wireless devices (100a to 100f).

[0149] Wireless communication / connection (150a, 150b, 150c) can be established between wireless devices (100a~100f) / base stations (200), and base stations (200) / base stations (200). Here, wireless communication / connection can be achieved through various wireless access technologies (e.g., 5G NR) such as uplink / downlink communication (150a), sidelink communication (150b) (or D2D communication), and communication between base stations (150c) (e.g., relay, IAB (Integrated Access Backhaul). Through wireless communication / connection (150a, 150b, 150c), wireless devices and base stations / wireless devices, and base stations and base stations can transmit / receive wireless signals to each other. For example, wireless communication / connection (150a, 150b, 150c) can transmit / receive signals through various physical channels. To this end, at least some of various configuration information setting processes for transmitting / receiving wireless signals, various signal processing processes (e.g., channel encoding / decoding, modulation / demodulation, resource mapping / demapping, etc.), and resource allocation processes can be performed based on various proposals of the present invention.

[0150] Examples of wireless devices to which the present invention is applied

[0151] Figure 6 illustrates a wireless device applicable to the present invention.

[0152] Referring to FIG. 6, the first wireless device (100) and the second wireless device (200) can transmit and receive wireless signals through various wireless access technologies (e.g., LTE, NR). Here, {the first wireless device (100), the second wireless device (200)} can correspond to {the wireless device (100x), the base station (200)} and / or {the wireless device (100x), the wireless device (100x)} of FIG. 5.

[0153] A first wireless device (100) includes one or more processors (102) and one or more memories (104), and may further include one or more transceivers (106) and / or one or more antennas (108). The processor (102) controls the memories (104) and / or the transceivers (106), and may be configured to implement the descriptions, functions, procedures, proposals, methods, and / or operational flowcharts disclosed in this document. For example, the processor (102) may process information in the memory (104) to generate first information / signal, and then transmit a wireless signal including the first information / signal via the transceiver (106). In addition, the processor (102) may receive a wireless signal including second information / signal via the transceiver (106), and then store information obtained from signal processing of the second information / signal in the memory (104). The memory (104) may be connected to the processor (102) and may store various information related to the operation of the processor (102). For example, the memory (104) may perform some or all of the processes controlled by the processor (102), or may store software code including commands for performing the descriptions, functions, procedures, proposals, methods, and / or operation flowcharts disclosed in this document. Here, the processor (102) and the memory (104) may be part of a communication modem / circuit / chip designed to implement a wireless communication technology (e.g., LTE, NR). The transceiver (106) may be connected to the processor (102) and may transmit and / or receive wireless signals via one or more antennas (108). The transceiver (106) may include a transmitter and / or a receiver. The transceiver (106) may be used interchangeably with an RF (Radio Frequency) unit. In the present invention, a wireless device may also mean a communication modem / circuit / chip.

[0154] The second wireless device (200) includes one or more processors (202), one or more memories (204), and may further include one or more transceivers (206) and / or one or more antennas (208). The processor (202) controls the memories (204) and / or the transceivers (206), and may be configured to implement the descriptions, functions, procedures, proposals, methods, and / or operational flowcharts disclosed in this document. For example, the processor (202) may process information in the memory (204) to generate third information / signals, and then transmit a wireless signal including the third information / signals via the transceivers (206). Furthermore, the processor (202) may receive a wireless signal including fourth information / signals via the transceivers (206), and then store information obtained from signal processing of the fourth information / signals in the memory (204). The memory (204) may be connected to the processor (202) and may store various information related to the operation of the processor (202). For example, the memory (204) may perform some or all of the processes controlled by the processor (202), or may store software code including commands for performing the descriptions, functions, procedures, proposals, methods, and / or operation flowcharts disclosed in this document. Here, the processor (202) and the memory (204) may be part of a communication modem / circuit / chip designed to implement wireless communication technology (e.g., LTE, NR). The transceiver (206) may be connected to the processor (202) and may transmit and / or receive wireless signals via one or more antennas (208). The transceiver (206) may include a transmitter and / or a receiver. The transceiver (206) may be used interchangeably with an RF unit. In the present invention, a wireless device may also mean a communication modem / circuit / chip.

[0155] Hereinafter, the hardware elements of the wireless device (100, 200) will be described in more detail. Although not limited thereto, one or more protocol layers may be implemented by one or more processors (102, 202). For example, one or more processors (102, 202) may implement one or more layers (e.g., functional layers such as PHY, MAC, RLC, PDCP, RRC, SDAP). One or more processors (102, 202) may generate one or more Protocol Data Units (PDUs) and / or one or more Service Data Units (SDUs) according to the descriptions, functions, procedures, proposals, methods, and / or operation flowcharts disclosed in this document. One or more processors (102, 202) may generate messages, control information, data, or information according to the descriptions, functions, procedures, proposals, methods, and / or operation flowcharts disclosed in this document. One or more processors (102, 202) can generate signals (e.g., baseband signals) including PDUs, SDUs, messages, control information, data or information according to the functions, procedures, proposals and / or methods disclosed herein, and provide the signals to one or more transceivers (106, 206). One or more processors (102, 202) can receive signals (e.g., baseband signals) from one or more transceivers (106, 206) and obtain PDUs, SDUs, messages, control information, data or information according to the descriptions, functions, procedures, proposals, methods and / or operational flowcharts disclosed herein.

[0156] One or more processors (102, 202) may be referred to as a controller, a microcontroller, a microprocessor, or a microcomputer. One or more processors (102, 202) may be implemented by hardware, firmware, software, or a combination thereof. For example, one or more Application Specific Integrated Circuits (ASICs), one or more Digital Signal Processors (DSPs), one or more Digital Signal Processing Devices (DSPDs), one or more Programmable Logic Devices (PLDs), or one or more Field Programmable Gate Arrays (FPGAs) may be included in one or more processors (102, 202). The descriptions, functions, procedures, proposals, methods, and / or operational flowcharts disclosed in this document may be implemented using firmware or software, and the firmware or software may be implemented to include modules, procedures, functions, etc. The descriptions, functions, procedures, suggestions, methods and / or operation flowcharts disclosed in this document may be implemented using firmware or software configured to perform one or more processors (102, 202) or stored in one or more memories (104, 204) and executed by one or more processors (102, 202). The descriptions, functions, procedures, suggestions, methods and / or operation flowcharts disclosed in this document may be implemented using firmware or software in the form of codes, instructions and / or sets of instructions.

[0157] One or more memories (104, 204) may be coupled to one or more processors (102, 202) and may store various forms of data, signals, messages, information, programs, codes, instructions, and / or commands. The one or more memories (104, 204) may be configured as ROM, RAM, EPROM, flash memory, hard drives, registers, cache memory, computer-readable storage media, and / or combinations thereof. The one or more memories (104, 204) may be located internally and / or externally to the one or more processors (102, 202). Additionally, the one or more memories (104, 204) may be coupled to the one or more processors (102, 202) via various technologies, such as wired or wireless connections.

[0158] One or more transceivers (106, 206) can transmit user data, control information, wireless signals / channels, etc., as mentioned in the methods and / or flowcharts of this document, to one or more other devices. One or more transceivers (106, 206) can receive user data, control information, wireless signals / channels, etc., as mentioned in the descriptions, functions, procedures, proposals, methods and / or flowcharts of this document, from one or more other devices. For example, one or more transceivers (106, 206) can be connected to one or more processors (102, 202) and can transmit and receive wireless signals. For example, one or more processors (102, 202) can control one or more transceivers (106, 206) to transmit user data, control information, or wireless signals to one or more other devices. Additionally, one or more processors (102, 202) may control one or more transceivers (106, 206) to receive user data, control information, or wireless signals from one or more other devices. Additionally, one or more transceivers (106, 206) may be coupled to one or more antennas (108, 208), and one or more transceivers (106, 206) may be configured to transmit and receive user data, control information, wireless signals / channels, or the like, as referred to in the descriptions, functions, procedures, proposals, methods, and / or operational flowcharts disclosed herein, via one or more antennas (108, 208). In this document, one or more antennas may be multiple physical antennas or multiple logical antennas (e.g., antenna ports). One or more transceivers (106, 206) can convert received user data, control information, wireless signals / channels, etc. from RF band signals to baseband signals in order to process the received user data, control information, wireless signals / channels, etc. using one or more processors (102, 202).One or more transceivers (106, 206) may convert user data, control information, wireless signals / channels, etc. processed by one or more processors (102, 202) from baseband signals to RF band signals. For this purpose, one or more transceivers (106, 206) may include an (analog) oscillator and / or filter.

[0159] Examples of wireless devices to which the present invention is applied

[0160] Figure 7 illustrates another example of a wireless device applicable to the present invention. The wireless device may be implemented in various forms depending on the use case / service (see Figure 5).

[0161] Referring to FIG. 7, the wireless device (100, 200) corresponds to the wireless device (100, 200) of FIG. 6 and may be composed of various elements, components, units / units, and / or modules. For example, the wireless device (100, 200) may include a communication unit (110), a control unit (120), a memory unit (130), and additional elements (140). The communication unit may include a communication circuit (112) and a transceiver(s) (114). For example, the communication circuit (112) may include one or more processors (102, 202) and / or one or more memories (104, 204) of FIG. 6. For example, the transceiver(s) (114) may include one or more transceivers (106, 206) and / or one or more antennas (108, 208) of FIG. 6. The control unit (120) is electrically connected to the communication unit (110), the memory unit (130), and the additional elements (140) and controls the overall operation of the wireless device. For example, the control unit (120) may control the electrical / mechanical operation of the wireless device based on the program / code / command / information stored in the memory unit (130). In addition, the control unit (120) may transmit information stored in the memory unit (130) to an external device (e.g., another communication device) via a wireless / wired interface through the communication unit (110), or store information received from an external device (e.g., another communication device) via a wireless / wired interface in the memory unit (130).

[0162] The additional element (140) may be configured in various ways depending on the type of the wireless device. For example, the additional element (140) may include at least one of a power unit / battery, an input / output unit (I / O unit), a driving unit, and a computing unit. Although not limited thereto, the wireless device may be implemented in the form of a robot (Fig. 5, 100a), a vehicle (Fig. 5, 100b-1, 100b-2), an XR device (Fig. 5, 100c), a portable 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 a financial device), a security device, a climate / environmental device, an AI server / device (Fig. 5, 400), a base station (Fig. 5, 200), a network node, etc. Wireless devices may be mobile or stationary depending on the use / service.

[0163] In FIG. 7, various elements, components, units / parts, and / or modules within the wireless device (100, 200) may be entirely interconnected via a wired interface, or at least some may be wirelessly connected via a communication unit (110). For example, within the wireless device (100, 200), the control unit (120) and the communication unit (110) may be wired, and the control unit (120) and a first unit (e.g., 130, 140) may be wirelessly connected via the communication unit (110). In addition, each element, component, unit / part, and / or module within the wireless device (100, 200) may further include one or more elements. For example, the control unit (120) may be composed of a set of one or more processors. For example, the control unit (120) may be composed of a set of a communication control processor, an application processor, an electronic control unit (ECU), a graphics processing processor, a memory control processor, etc. As another example, the memory unit (130) may be composed of RAM (Random Access Memory), DRAM (Dynamic RAM), ROM (Read Only Memory), flash memory, volatile memory, non-volatile memory, and / or a combination thereof.

[0164] Examples of vehicles or autonomous vehicles to which the present invention is applied

[0165] Figure 8 illustrates a vehicle or autonomous vehicle applicable to the present invention. The vehicle or autonomous vehicle may be implemented as a mobile robot, a car, a train, a manned or unmanned aerial vehicle (AV), a ship, or the like.

[0166] Referring to FIG. 8, a vehicle or autonomous vehicle (100) may include an antenna unit (108), a communication unit (110), a control unit (120), a driving unit (140a), a power supply unit (140b), a sensor unit (140c), and an autonomous driving unit (140d). The antenna unit (108) may be configured as a part of the communication unit (110). Blocks 110 / 130 / 140a to 140d correspond to blocks 110 / 130 / 140 of FIG. 7, respectively.

[0167] The communication unit (110) can transmit and receive signals (e.g., data, control signals, etc.) with external devices such as other vehicles, base stations (e.g., base stations, road side units, etc.), and servers. The control unit (120) can control elements of the vehicle or autonomous vehicle (100) to perform various operations. The control unit (120) can include an ECU (Electronic Control Unit). The drive unit (140a) can drive the vehicle or autonomous vehicle (100) on the ground. The drive unit (140a) can include an engine, a motor, a power train, wheels, brakes, a steering device, etc. The power supply unit (140b) supplies power to the vehicle or autonomous vehicle (100) and can include a wired / wireless charging circuit, a battery, etc. The sensor unit (140c) can obtain vehicle status, surrounding environment information, user information, etc. The sensor unit (140c) may include an IMU (inertial measurement unit) sensor, a collision sensor, a wheel sensor, a speed sensor, an incline sensor, a weight detection sensor, a heading sensor, a position module, a vehicle forward / backward sensor, a battery sensor, a fuel sensor, a tire sensor, a steering sensor, a temperature sensor, a humidity sensor, an ultrasonic sensor, an illuminance sensor, a pedal position sensor, etc. The autonomous driving unit (140d) may implement a technology for maintaining a driving lane, a technology for automatically controlling speed such as adaptive cruise control, a technology for automatically driving along a set path, a technology for automatically setting a path and driving when a destination is set, etc.

[0168] For example, the communication unit (110) can receive map data, traffic information data, etc. from an external server. The autonomous driving unit (140d) can generate an autonomous driving route and driving plan based on the acquired data. The control unit (120) can control the drive unit (140a) so that the vehicle or autonomous vehicle (100) moves along the autonomous driving route according to the driving plan (e.g., speed / direction control). During autonomous driving, the communication unit (110) can irregularly / periodically acquire the latest traffic information data from an external server and can acquire surrounding traffic information data from surrounding vehicles. In addition, during autonomous driving, the sensor unit (140c) can acquire vehicle status and surrounding environment information. The autonomous driving unit (140d) can update the autonomous driving route and driving plan based on newly acquired data / information. The communication unit (110) can transmit information regarding the vehicle location, autonomous driving route, driving plan, etc. to the external server. External servers can predict traffic information data in advance using AI technology or other technologies based on information collected from vehicles or autonomous vehicles, and provide the predicted traffic information data to the vehicles or autonomous vehicles.

[0169] It will be apparent to those skilled in the art that the present invention can be embodied in other specific forms without departing from the scope of the invention. Therefore, the above detailed description should not be construed as limiting in any respect, but rather as illustrative. The scope of the present invention should be determined by a reasonable interpretation of the appended claims, and all modifications within the scope of equivalents of the present invention are intended to be included within the scope of the present invention.

[0170] As described above, the present invention can be applied to various wireless communication systems.

Claims

1. In a method for a terminal to transmit and receive a signal in a wireless communication system, A step for receiving a CSI (channel state information) report setting; A step of receiving DCI (downlink control information) to trigger CSI reporting; A step of receiving a CSI-RS (CSI-reference signal) on a CSI-RS resource based on the above CSI reporting settings; and A step of transmitting a CSI report triggered by the DCI based on the measurement result for the CSI-RS; The above CSI reporting settings include sub-settings, Based on the above DCI including information corresponding to one or more of the sub-settings, the CSI report includes CSI information for the one or more sub-settings, Based on the fact that the DCI does not contain information corresponding to any of the sub-settings, the CSI report contains CSI information for all of the sub-settings. Method of transmitting and receiving signals.

2. In paragraph 1, The above DCI indicates one or more sub-settings based on the code point of a specific field, The values ​​that can be the above code points are divided into values ​​for indicating single-CSI reporting for one sub-setting and values ​​for indicating multi-CSI reporting for multiple sub-settings. Method of transmitting and receiving signals.

3. In paragraph 2, If the above code point is a first value for indicating the multi-CSI report, and there is no sub-setting corresponding to the first value, the CSI report includes CSI information for all of the sub-settings. Method of transmitting and receiving signals.

4. In paragraph 2, If the above code point is a second value for indicating the single-CSI report, and there is no sub-setting corresponding to the second value, the CSI report is not performed. Method of transmitting and receiving signals.

5. In paragraph 2, Based on the number of bits in the above specific field, values ​​for indicating single-CSI reporting and values ​​for indicating multi-CSI reporting are distinguished through a MAC (medium access control) CE (control element). Method of transmitting and receiving signals.

6. In a terminal for transmitting and receiving signals in a wireless communication system, At least one transceiver; at least one processor; and At least one memory operably connected to said at least one processor and storing instructions that, when executed, cause said at least one processor to perform a specific operation; The above specific actions are: A step for receiving a CSI (channel state information) report setting; A step of receiving DCI (downlink control information) to trigger CSI reporting; A step of transmitting a CSI-RS (CSI-reference signal) on a CSI-RS resource based on the above CSI reporting settings; and A step of transmitting a CSI report triggered by the DCI based on the measurement result for the CSI-RS; The above CSI reporting settings include sub-settings, Based on the above DCI including information corresponding to one or more of the sub-settings, the CSI report includes CSI information for the one or more sub-settings, Based on the fact that the DCI does not contain information corresponding to any of the sub-settings, the CSI report contains CSI information for all of the sub-settings. Terminal.

7. In paragraph 6, The above DCI indicates one or more sub-settings based on the code point of a specific field, The values ​​that can be the above code points are divided into values ​​for indicating single-CSI reporting for one sub-setting and values ​​for indicating multi-CSI reporting for multiple sub-settings. Terminal.

8. In paragraph 7, If the above code point is a first value for indicating the multi-CSI report, and there is no sub-setting corresponding to the first value, the CSI report includes CSI information for all of the sub-settings. Terminal.

9. In paragraph 7, If the above code point is a second value for indicating the single-CSI report, and there is no sub-setting corresponding to the second value, the CSI report is not performed. Terminal.

10. In paragraph 7, Based on the number of bits in the above specific field, values ​​for indicating single-CSI reporting and values ​​for indicating multi-CSI reporting are distinguished through a MAC (medium access control) CE (control element). Terminal.

11. In a device for a terminal, at least one processor; and At least one computer memory operably connected to said at least one processor and configured to, when executed, cause said at least one processor to perform operations, said operations comprising: A step for receiving a CSI (channel state information) report setting; A step of receiving DCI (downlink control information) to trigger CSI reporting; A step of receiving a CSI-RS (CSI-reference signal) on a CSI-RS resource based on the above CSI reporting settings; and A step of transmitting a CSI report triggered by the DCI based on the measurement result for the CSI-RS; The above CSI reporting settings include sub-settings, Based on the above DCI including information corresponding to one or more of the sub-settings, the CSI report includes CSI information for the one or more sub-settings, Based on the fact that the DCI does not contain information corresponding to any of the sub-settings, the CSI report contains CSI information for all of the sub-settings. device.

12. A computer-readable non-volatile storage medium comprising at least one computer program that causes at least one processor to perform an operation, the operation comprising: A step for receiving a CSI (channel state information) report setting; A step of receiving DCI (downlink control information) to trigger CSI reporting; A step of receiving a CSI-RS (CSI-reference signal) on a CSI-RS resource based on the above CSI reporting settings; and A step of transmitting a CSI report triggered by the DCI based on the measurement result for the CSI-RS; The above CSI reporting settings include sub-settings, Based on the above DCI including information corresponding to one or more of the sub-settings, the CSI report includes CSI information for the one or more sub-settings, Based on the fact that the DCI does not contain information corresponding to any of the sub-settings, the CSI report contains CSI information for all of the sub-settings. Storage media.

13. In a method for a base station to transmit and receive signals in a wireless communication system, Step of transmitting CSI (channel state information) reporting settings; A step of transmitting DCI (downlink control information) to trigger CSI reporting; A step of transmitting a CSI-RS (CSI-reference signal) on a CSI-RS resource based on the above CSI reporting settings; and A step of receiving a CSI report triggered by the DCI based on the measurement result for the CSI-RS; The above CSI reporting settings include sub-settings, Based on the above DCI including information corresponding to one or more of the sub-settings, the CSI report includes CSI information for the one or more sub-settings, Based on the fact that the DCI does not contain information corresponding to any of the sub-settings, the CSI report contains CSI information for all of the sub-settings. Method of transmitting and receiving signals.

14. In a base station for transmitting and receiving signals in a wireless communication system, At least one transceiver; at least one processor; and At least one memory operably connected to said at least one processor and storing instructions that, when executed, cause said at least one processor to perform a specific operation; The above specific actions are: Step of transmitting CSI (channel state information) reporting settings; A step of transmitting DCI (downlink control information) to trigger CSI reporting; A step of transmitting a CSI-RS (CSI-reference signal) on a CSI-RS resource based on the above CSI reporting settings; and A step of receiving a CSI report triggered by the DCI based on the measurement result for the CSI-RS; The above CSI reporting settings include sub-settings, Based on the above DCI including information about one or more of the sub-settings, the CSI report includes CSI information about the one or more sub-settings, Based on the fact that the DCI does not contain information about any of the sub-settings, the CSI report contains CSI information about all of the sub-settings. Base station.

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